Stationary volume ratio adjustment mechanism

A screw compressor with a volume ratio adjustment mechanism. The volume adjustment mechanism is a penetration in the housing of a screw compressor. The penetration includes one or more apertures. The apertures provide a flow path between the compressor outlet and an interlobe region of the screw compressor rotors. A member resides in the penetration and is movable from a first position in which the apertures are blocked and the flow path is closed and a second position in which the apertures are not blocked and the flow path is open. By unblocking the apertures and opening the flow path, the volume ratio can be adjusted.

Compressor

A compressor including a compression mechanism configured and positioned to receive vapor from an intake passage and provide compressed vapor to a discharge passage. An opening is positioned in the compression mechanism in fluid communication with the discharge passage. A valve has an aperture formed therein, the aperture configured and positioned in fluid communication with a passageway to provide a path for a pressurized vapor flow to a first chamber and a first piston without mixing with vapor in the discharge passage. A second chamber is in fluid communication with a second piston and the discharge passage, the first piston and the second piston of the valve configured to move together. First piston and second piston movement are controllable in response to predetermined conditions to maintain the magnitude of pressure of the compression mechanism immediately upstream of the opening at substantially the same pressure magnitude at the discharge passage.

Single-screw compressor

A screw compressor includes a screw rotor, a gate rotor, a drive mechanism to rotate the screw rotor, a cylinder, a discharge port and an adjustment mechanism. The screw rotor has an outer periphery with a helical groove engaged with radially arranged gates of the gate rotor. First and second axial ends of the screw rotor form suction and discharge sides, respectively. The cylinder accommodates the screw rotor to define a compression chamber in the helical groove. Fluid in the coin cession chamber flows through the discharge port toward the discharge side of the screw rotor. The adjustment mechanism is configured to adjust a compression ratio of the compression chamber within a predetermined. range. The adjustment mechanism adjusts the compression ratio to a minimum compression ratio immediately before or when operation of the adjustment mechanism is stopped.

Screw compressor

A screw compressor includes a casing having low and high pressure spaces, a screw rotor inserted in a cylinder part of the casing, and a slide valve disclosed in the cylinder part. The screw rotor has a plurality of helical grooves forming a compression chamber. The slide valve is moveable along an axis of the screw rotor and faces an outer periphery of the screw rotor to form a discharge port to communicating the compression chamber with the high pressure space. Fluid in the low pressure space is sucked into the compression chamber, compressed, and then discharged to the high-pressure space when the screw rotor rotates. The slide valve includes a sealing projection located on a back surface of the slide valve opposite to the screw rotor, and separating the low and high pressure spaces from each other when the sealing projection is in slidable contact with the casing.

VOLUME RATIO CONTROL SYSTEM AND METHOD

A system and method for controlling the volume ratio of a compressor is provided. The system can use a port () or ports in a rotor cylinder to bypass vapor from the compression chamber to the discharge passage of the compressor. A control valve () can be used to open or close the port or ports to obtain different volume ratios in the compressor. The control valve () can be moved or adjusted by one or more valves that control a flow of fluid to the valve. A control algorithm can be used to control the one or more valves to move the control valve to obtain different volume ratios from the compressor. The control algorithm can control the one or more valves in response to operating parameters associated with the compressor. 1. (canceled)2. A compressor comprising:an intake passage;a discharge passage;a compression mechanism, the compression mechanism being positioned to receive vapor from the intake passage and provide compressed vapor to the discharge passage;a port positioned in the compression mechanism to bypass a portion of the vapor in the compression mechanism to the discharge passage;a valve positioned near the port to control vapor flow through the port;the valve having a first position to permit a first vapor flow from the compression mechanism to the discharge passage, a second position to permit a second vapor flow from the compression mechanism to the discharge passage and a third position to prevent vapor flow from the compression mechanism to the discharge passage;the compressor having a first volume ratio in response to the valve being in the first position, a second volume ratio in response to the valve being in the second position and a third volume ratio in response to the valve being in the third position, the first volume ratio being less than the second volume ratio and the the second volume ratio being less than the third volume ratio;at least one solenoid valve, the at least one solenoid valve being positioned to control a flow of fluid to the ...

COMPRESSOR HAVING CAPACITY MODULATION ASSEMBLY

A compressor may include a shell, first and second scrolls, a seal assembly, a modulation control chamber, and a modulation control valve. The first scroll may include a first end plate having a biasing passage extending therethrough. The seal assembly may isolate a discharge pressure region from a suction pressure region. The seal assembly and the first scroll may define an axial biasing chamber therebetween that communicates with the axial biasing chamber and a first pocket between the first and second scrolls. The modulation control chamber may be fluidly coupled with the biasing chamber by a first passage. The modulation control valve may be fluidly coupled with the modulation control chamber by a second passage and movable between a first position allowing communication between the second passage and the suction pressure region and a second position restricting communication between the second passage and the suction pressure region. 1. A compressor comprising:a shell assembly defining a suction pressure region and a discharge pressure region;a first scroll member disposed within said shell assembly and including a first end plate having a discharge passage, a first spiral wrap extending from said first end plate and a biasing passage extending through said first end plate;a second scroll member disposed within said shell assembly and including a second end plate having a second spiral wrap extending therefrom, said first and second spiral wraps meshingly engaged with each other and forming a series of pockets therebetween;a seal assembly engaging said first scroll member and isolating said discharge pressure region from said suction pressure region, said seal assembly and said first scroll member defining an axial biasing chamber therebetween, said biasing passage being in communication with a first of said pockets and said axial biasing chamber;a modulation control chamber fluidly coupled with said axial biasing chamber by a first passage; anda modulation ...

Apparatus and Method for Enhancing Compressor Efficiency

Disclosed herein is a single screw gas compressor having a housing including a cylindrical bore, a primary and secondary gate rotors mounted for rotation in the housing, each gate rotor having a plurality of gear teeth, a main rotor rotatably mounted in the bore and having a plurality of grooves and a plurality of threads, wherein each groove meshingly engages at least one of the gear teeth from each gate rotor, a primary economizer port in communication with the cylindrical bore, and a secondary economizer port in communication with the cylindrical bore. 1. A single screw gas compressor comprising:a housing including a cylindrical bore;primary and secondary gate rotors mounted for rotation in the housing, each gate rotor having a plurality of gear teeth;a main rotor rotatably mounted in the bore and having a plurality of grooves and a plurality of threads, wherein each groove meshingly engages at least one of the gear teeth from each gate rotor;a primary economizer port in communication with the cylindrical bore; anda secondary economizer port in communication with the cylindrical bore.2. The compressor of further including a first gas compression chamber created by a portion of the primary gate rotor claim 1 , a portion of a respective main rotor groove claim 1 , and the cylindrical bore claim 1 , and a second gas compression chamber created by a portion of the secondary gate rotor claim 1 , a portion of a respective main rotor groove claim 1 , and the cylindrical bore.3. The compressor of claim 2 , wherein gas is received in the first gas compression chamber via the primary economizer port during rotational operation of the main rotor.4. The compressor of claim 2 , wherein gas is received in the second gas compression chamber via the secondary economizer port during rotational operation of the main rotor.5. The compressor of claim 4 , further including a secondary discharge port opening claim 4 , wherein gas in the second gas chamber is discharged via the ...

BEARING PLATE BLEED PORT FOR ROOTS-TYPE SUPERCHARGERS

A Roots-type supercharger includes a housing a first rotor a second rotor an outlet volume a transfer volume and a bleed port The housing includes an interior chamber an inlet port and an outlet port The first rotor and the second rotor have a plurality of lobes respectively. The outlet volume is substantially bounded between the outlet port, the first rotor, the second rotor, and the interior chamber of the housing. The transfer volume is substantially bounded between the first rotor, the second rotor, and the interior chamber of the housing. The bleed port is adapted to fluidly connect the outlet volume and the transfer volume at least during a portion of a transfer volume cycle. The variable bleed port may include a plate that pivots about a pivot or slides along a slide. The plate may be arc shaped and may arc around a centerline of one of the rotors. The plate may be positioned within an operating cavity. The operating cavity may be defined within the housing between a bearing plate and a main housing of the housing. A method of supercharging an internal combustion engine includes bleeding a transfer volume to an outlet volume through a bleed port. 1100. A Roots-type supercharger comprising:{'b': 120', '130', '140', '150, 'a housing including an interior chamber , an inlet port , and an outlet port ;'}{'b': 200', '210, 'a first rotor with a plurality of lobes ;'}{'b': 300', '310, 'a second rotor with a plurality of lobes ;'}{'b': '400', 'an outlet volume substantially bounded between the outlet port, the first rotor, the second rotor, and the interior chamber of the housing;'}{'b': '500', 'a transfer volume substantially bounded between the first rotor, the second rotor, and the interior chamber of the housing; and'}{'b': 600', '600, 'a bleed port , ′ adapted to fluidly connect the outlet volume and the transfer volume at least during a portion of a transfer volume cycle.'}2160152. The Roots-type supercharger of claim 1 , wherein the housing includes a first ...

ADJUSTABLE CORE TURBOCHARGER

A turbocharger is provided herein. The turbocharger includes a housing and an adjustable core at least partially circumferentially surrounded by the housing, the adjustable core having a turbine rotor coupled to a compressor rotor via a shaft. The turbocharger further includes an adjustment mechanism coupled to the adjustable core configured to adjust an axial position of the housing relative to the adjustable core in response to adjustment commands. 1. A method for a turbocharger comprising:adjusting an adjustment mechanism of the turbocharger in response to operating conditions, the turbocharger include a housing and an adjustable core circumferentially surrounded by the housing, the adjustable core axially slideable relative to the housing and including a turbine rotor coupled to a compressor rotor via a shaft, the adjustment mechanism coupled to the adjustable core, the core sliding the compressor rotor and the turbine rotor concurrently.2. The method of claim 1 , wherein the housing include a compressor volute and a turbine scroll claim 1 , the compressor volute configured to receive air from a compressor rotor and the turbine scroll configured to direct exhaust gas into a turbine rotor claim 1 , wherein the core slides the compressor rotor relative to the volute and the turbine rotor relative to the turbine scroll concurrently.3. The method of claim 1 , further comprising a second turbine scroll configured to direct exhaust gas to the turbine rotor.4. The method of claim 3 , wherein the first and second turbine scrolls are separated via a divider.5. The method of claim 4 , wherein the divider includes a coolant passage configured to flow coolant therethrough.6. The method of claim 1 , wherein the adjustable core includes an adjustment post extending therefrom.7. The method of claim 6 , wherein the adjustment post is moveably positioned in a track.8. The method of claim 7 , wherein the track circumferentially extends around the adjustable core and includes a ...

VARIABLE CAPACITY COMPRESSOR

A variable capacity compressor is provided, including: two cylinders and a middle plate; at least one flow channel provided in the middle plate, wherein one end of the flow channel is connected to an exhaust chamber of any one of the two cylinders, the other end is connected to a suction chamber of the other one of the two cylinders. In present disclosure, by setting a flow channel in the middle plate of the variable capacity compressor, the exhaust chamber of one cylinder is connected to the suction chamber of the other cylinder. When the flow channel is completely closed, the two cylinders operate independently; when the flow channel is opened, the refrigerant in the exhaust chamber flows into the suction chamber through the flow channel, that is, the upper cylinders and the lower cylinder are connected to each other, which can adjust the capacity of the compressor. 1. A variable capacity compressor , comprising:two cylinders;a middle plate, separating the two cylinders, and at least one flow channel provided in the middle plate, wherein one end of the flow channel is connected to an exhaust chamber of any one of the two cylinders, the other end of the flow channel is connected to a suction chamber of the other one of the two cylinders; each flow channel is provided with a flow control component for adjusting flow rate of refrigerant flowing through the flow channel.2. The variable capacity compressor of claim 1 , wherein the flow control component comprises a first slider provided in the middle plate claim 1 , and the first slider is capable of moving along a radial direction of the middle plate to change an effective flow area of the flow channel claim 1 , which adjusts the flow rate of the refrigerant flowing through the flow channel.3. The variable capacity compressor of claim 2 , wherein the first slider is driven by a solenoid valve claim 2 , so that the first slider moves along the radial direction of the middle plate.4. The variable capacity compressor of ...

Variable economizer injection position

A compressor includes a bore, a rotor disposed within the bore, a compressor inlet, and a compressor outlet. The compressor further includes a compression chamber defined between the bore and the rotor, wherein a volume of the compression chamber gradually reduces from the compressor inlet to the compressor outlet. The compressor includes an economizer. The economizer is fluidically connected to the compression chamber. The economizer is configured to inject a working fluid into the compression chamber at an injection position. The injection position is changeable according to a working condition of the compressor.

VARIABLE VOLUME RATIO COMPRESSOR

A compressor and method for controlling the volume ratio of a compressor is provided. The compressor includes a an intake passage, a discharge passage and a compression mechanism, the compression mechanism being positioned to receive vapor from the intake passage and provide compressed vapor to the discharge passage. At least one opening is positioned in the compression mechanism to bypass a portion of the vapor in the compression mechanism to the discharge passage, the at least one opening being sized and positioned to automatically vary a volume ratio in the compressor in response to a varying pressure differential between the intake passage and the discharge passage. 1. A compressor comprising:an intake passage;a discharge passage;a compression mechanism, the compression mechanism being positioned to receive vapor from the intake passage and provide compressed vapor to the discharge passage; andat least one opening positioned in the compression mechanism to bypass a portion of the vapor in the compression mechanism to the discharge passage;wherein the at least one opening being sized and positioned to automatically vary a volume ratio in the compressor in response to a varying pressure differential between the intake passage and the discharge passage.2. The compressor of claim 1 , wherein the volume ratio is variable between a partial load and a full load.3. The compressor of claim 1 , wherein the compressor is a screw compressor.4. The compressor of claim 3 , wherein the screw compressor includes a first rotor and a second rotor.5. The compressor of claim 4 , wherein the at least one opening is positioned in fluid communication with at least one of the first rotor and the second rotor.6. The compressor of claim 4 , wherein the at least one opening is positioned in fluid communication with each of the first rotor and the second rotor.7. The compressor of claim 6 , wherein at least a portion of the at least one opening is positioned symmetric to a plane positioned ...

SYSTEMS AND METHODS FOR ENHANCED COMPRESSOR BEARING LIFE

The present disclosure relates to a bearing load control system that includes a force application device configured to apply a force to a bearing of a compressor and a sensor configured to provide feedback indicative of an operating parameter of the compressor. The bearing load control system also includes a controller that is communicatively coupled to the sensor and configured to determine an indication of a thrust force applied to the bearing based on the feedback indicative of the operating parameter. The controller is also configured to adjust the force application device to control the force applied to the bearing based at least in part on a control algorithm and the indication of the thrust force. 1. A bearing load control system , comprising:a force application device configured to apply a force to a bearing of a compressor;a sensor configured to provide feedback indicative of an operating parameter of the compressor; anda controller, wherein the controller is communicatively coupled to the sensor and configured to determine an indication of a thrust force applied to the bearing based on the feedback indicative of the operating parameter, wherein the controller is configured to adjust the force application device to control the force applied to the bearing based at least in part on a control algorithm and the indication of the thrust force.2. The bearing load control system of claim 1 , wherein the controller is configured to adjust the force application device to control the force claim 1 , such that a resultant force applied to the bearing is within a threshold range of a target bearing load.3. The bearing load control system of claim 1 , wherein the force and the thrust force are applied in a same direction with respect to a central axis of the compressor or applied in substantially opposite directions with respect to the central axis of the compressor.4. The bearing load control system of claim 1 , wherein the sensor is configured to provide additional ...

Gas Compressor

A technique is provided that can further reduce power at the time of “unload operation control” in a gas compressor that generates a compressed gas at a set pressure by constant-speed control. The gas compressor includes a compressor main unit, a drive source, an intake throttle valve, a gas release valve, rotation speed converting means, a pressure detecting device that detects a discharge pressure, and a controller that, the relationship between an upper-limit pressure H and a lower-limit pressure L being H>L, carries out opening the intake throttle valve and closing the gas release valve and operating the drive source at a full-load rotation speed until the discharge pressure reaches the upper-limit pressure H. The controller carries out at least one of closing the intake throttle valve and opening the gas release valve to reduce the discharge pressure to within a predetermined range when the discharge pressure reaches the upper-limit pressure H. The controller carries out switching to load operation when the discharge pressure drops to the lower-limit pressure L. In the gas compressor, the controller outputs a command of a lower rotation speed than the full-load rotation speed to the rotation speed converting means when the discharge pressure rises and reaches the upper-limit pressure H. The controller outputs a command of the full-load rotation speed to the rotation speed converting means when the discharge pressure drops and reaches the lower-limit pressure L.

COMPRESSOR WITH CAPACITY MODULATION AND VARIABLE VOLUME RATIO

A compressor is provided and may include a shell assembly defining a suction pressure region and a discharge pressure region. A first scroll member may include a first discharge port and a first modulation port. A second scroll member may include a first variable volume ratio port. A capacity modulation valve assembly may be in fluid communication with the first modulation port and may be displaceable between open and closed positions to selectively provide communication between a first intermediate compression pocket and the suction pressure region via the first modulation port. A variable volume ratio valve assembly may be in fluid communication with the first variable volume ratio port. The variable volume ratio valve assembly may be displaceable between open and closed positions to selectively provide communication between a second intermediate compression pocket and the discharge pressure region via the first variable volume ratio port. 1. (canceled)2. A compressor comprising:a shell assembly;a first scroll member disposed within said shell assembly, said first scroll member including a first end plate defining a discharge port and a first port and having a first spiral wrap extending from a first side thereof;a second scroll member disposed within said shell assembly and including a second end plate defining a second port and having a second spiral wrap extending therefrom and meshingly engaged with said first spiral wrap to form a suction-pressure pocket in fluid communication with a suction-pressure region disposed outside of said first and second spiral wraps, intermediate-pressure pockets, and a discharge-pressure pocket in fluid communication with a discharge-pressure region disposed outside of said first and second spiral wraps, a first of said intermediate-pressure pockets being in fluid communication with said first port and a second of said intermediate-pressure pockets being in fluid communication with said second port;a motor assembly driving ...

Screw compressor slide valve and screw compressor with gas pulsation attenuation function

A screw compressor slide valve with gas pulsation attenuation function includes valve walls and internal through holes. A screw compressor includes the screw compressor slide valve. A part of exhausted gas of the screw compressor is directly discharged from an exhaust port to an exhaust chamber to form a main exhaust flow channel; another part of the exhausted gas is discharged from the exhaust port into the exhaust chamber after being delayed by the internal through holes, which forms a branched exhaust flow channel. Since the branched exhaust flow channel is longer than the main exhaust flow channel, when the gas pulsation in the branched exhaust flow channel lags behind that in the main exhaust flow channel by 180-degree in phase, two gas pulsations in the two flow channels are offset due to opposite gas pulsation phases, which attenuates the gas pulsation, thereby suppressing induced vibration and noise.

Compressor and air conditioner

The invention discloses a compressor. The compressor includes a first primary cylinder, a second primary cylinder and a secondary cylinder, which are stacked, a separator is provided between two adjacent cylinders. The first primary cylinder is provided with a first air entry, the second primary cylinder is provided with a second air entry, and the secondary cylinder is provided with an air outlet. The first primary cylinder and the second primary cylinder are connected in serial to the secondary cylinder after being connected in parallel. A refrigerant entering the first air entry and the second air entry is discharged from the air outlet after primary or/and secondary compression. The two separators are divided into a first separator and a second separator. Any one or two of the first separator, the second separator and a lower flange may be provided with a slide piece control device. 1. A compressor , comprising:a first primary cylinder, a second primary cylinder, a secondary cylinder and a lower flange, wherein the first primary cylinder, the second primary cylinder and the secondary cylinder are stacked, a separator is provided between two adjacent cylinders, the secondary cylinder is provided at the same side of the first primary cylinder and the second primary cylinder, or the secondary cylinder is provided between the first primary cylinder and the second primary cylinder, and the lower flange is provided at the lower sides of the first primary cylinder, the second primary cylinder and the secondary cylinder;the first primary cylinder is provided with a first air entry and a first slide piece groove, a first slide piece is provided in the first slide piece groove, the second primary cylinder is provided with a second air entry and a second slide piece groove, a second slide piece is provided in the second slide piece groove, the secondary cylinder is provided with an air outlet and a third slide piece groove, and a third slide piece is provided in the third ...

GAS COMPRESSOR

A gas compressor is configured such that a suction-side area that is in sliding contact with the inner circumferential surface of a cylinder chamber when a compression chamber is in the suction stroke has a larger radius of curvature than that of a compression-side area that is in sliding contact with the inner circumferential surface of the cylinder chamber when the compression chamber is in the compression stroke. 1. A gas compressor comprising:a cylinder block in a cylindrical shape, having a cylinder chamber where to compress refrigerant;a rotor rotatably provided in the cylinder chamber, the rotor having an outer circumferential surface facing an inner circumferential surface of the cylinder chamber and a plurality of vane slots opening on the outer circumferential surface with intervals in a rotational direction of the rotor; anda plurality of vanes housed in the respective vane slots and biased in a direction of protruding from the outer circumferential surface, distal end surfaces of the vanes sliding on the inner circumferential surface along with rotation of the rotor, the vanes partitioning a space between the outer circumferential surface and the inner circumferential surface into a plurality of compression chambers in which the refrigerant is sucked and compressed, whereinthe distal end surface of each of the vanes has a suction-side area that is in sliding contact with the inner circumferential surface when the compression chamber separated by the vane having the distal end surface is in a suction stroke, and a compression-side area that is in sliding contact with the inner circumferential surface when the compression chamber separated by the vane having the distal end surface is in a compression stroke,the suction-side area and the compression-side area have smaller radii of curvature than that of the inner circumferential surface, andthe suction-side area has a larger radius of curvature than that of the compression-side area.2. The gas compressor ...

AIR CONDITIONER AND COMPRESSOR

The present disclosure relates to an air conditioner and a compressor. The compressor includes: a first cylinder assembly, including a first cylinder body and a first sliding vane, a volume control assembly, including a pressure regulator; wherein the pressure regulator is provided with a storage cavity, and the storage cavity is communicated with the variable volume control cavity; wherein the first sliding vane is configured to slide in a reciprocating manner between the first compression cavity and the variable volume control cavity along the first sliding vane groove, to change the volume of the variable volume control cavity; and the refrigerant introduced into the variable volume control cavity flows between the variable volume control cavity and the storage cavity along with a change of the volume of the variable volume control cavity. 1. A compressor , comprising:a first cylinder assembly, comprising a first cylinder body and a first sliding vane, wherein the first cylinder body is provided with a first compression cavity, a variable volume control cavity and a first sliding vane groove, and the first sliding vane groove communicates the first compression cavity with the variable volume control cavity, the first sliding vane is slidably arranged in the first sliding vane groove, and a part of the first sliding vane being configured to extend into the first compression cavity, and another part of the first sliding vane being configured to extend into the inside of the variable volume control cavity; anda variable volume control assembly, comprising a pressure regulator; wherein the pressure regulator is provided with a storage cavity, the storage cavity being configured to accommodate refrigerant, and the storage cavity is communicated with the variable volume control cavity; andwherein the first sliding vane is so configured that when the first sliding vane slides along the first sliding vane groove the size of the another part extending into the variable ...

Compressor Unit and Method for Operating a Compressor Unit

A compressor unit including a screw compressor having a compressor housing that has a screw rotor chamber arranged in the compressor housing, two screw rotors that are arranged in the screw rotor chamber and are mounted on the compressor housing to be rotatable about a respective screw rotor axis, and at least one control slider, which is arranged in a slider channel of the compressor housing, is adjacent to both screw rotors and is movable in a direction of displacement parallel to the screw rotor axes and takes a form such that it affects the final volume and/or the initial volume, wherein there is provided on the screw compressor a compressor operational control unit that takes a form such that it performs a compressor operating function that assists at least one operation of the compressor unit. 1. A compressor unit , including a screw compressor having a compressor housing that has a screw rotor chamber arranged in the compressor housing , at least one screw rotor that is arranged in the screw rotor chamber , is mounted on the compressor housing to be rotatable about a screw rotor axis and receives gaseous medium having an initial volume that is supplied by way of a low-pressure chamber arranged in the compressor housing and discharges it , compressed to a final volume , in the region of a high-pressure chamber arranged in the compressor housing , and at least one control slider , which is arranged in a slider channel of the compressor housing , is adjacent to the screw rotor and is movable in a direction of displacement parallel to the screw rotor axis and takes a form such that it affects the final volume and/or the initial volume ,there is provided on the screw compressor a compressor operational control unit that takes a form such that it performs a compressor operating function that assists at least one operation of the compressor unit.2. A compressor unit according to claim 1 , wherein the at least one compressor operating function is a parameter ...

Screw Compressor

A screw compressor, including a compressor housing having a screw rotor chamber arranged therein, two screw rotors that are arranged in the screw rotor chamber and are mounted on the compressor housing, each rotatably about a respective screw rotor axis, and engage in each other by means of their helical contours, and including two control sliders that are arranged one behind the other in a slider channel of the compressor housing in a direction of displacement parallel to the screw rotor axes and are adjacent to both screw rotors by means of slider compression wall surfaces and are movable in the direction of displacement, wherein, in a combined position with mutually facing end surfaces sealing tightly with each other, the first control slider and the second control slider and are movable together in the direction of displacement and, in a separated position, are positionable at a spacing from one another, forming an intermediate space, wherein, at least in a transfer position located between the combined position and the separated position, the control sliders form an inflow chamber into which the medium to be compressed flows out of one of the compression chambers by passing between the mutually facing end surfaces of the control sliders, and wherein one of the control sliders is provided with at least one outflow outlet that is adjacent to the inflow chamber and through which the medium from the inflow chamber enters an outflow opening in the slider channel that overlaps with the outflow outlet in this transfer position. 1. A screw compressor , including a compressor housing having a screw rotor chamber arranged therein , two screw rotors that are arranged in the screw rotor chamber and are mounted on the compressor housing , each rotatably about a respective screw rotor axis , and engage in each other by means of their helical contours and each cooperate with compression wall surfaces which are adjacent thereto and partly surround them in order to receive ...

Variable Volume Ratio Compressor

A compressor may include a shell, first and second scroll members, a partition plate and a bypass valve member. The shell defines a discharge-pressure region and a suction-pressure region. The first scroll member is disposed within the shell and may include a first end plate having a discharge passage, and first and second bypass passages extending through the first end plate. The partition plate is disposed within the shell and separates the discharge-pressure region from the suction-pressure region and includes an opening in communication with the discharge-pressure region. The bypass valve member is movable between a first position restricting fluid flow through at least one of the first and second bypass passages and the opening and a second position in allowing fluid flow through the at least one of the first and second bypass passages and the opening. 1. A compressor comprising:a shell defining a discharge-pressure region and a suction-pressure region;a first scroll member disposed within the shell and including a first end plate and a first spiral wrap extending from a first side of the first end plate, the first end plate including a discharge passage, a first bypass passage and a second bypass passage extending through the first side and a second side of the first end plate;a second scroll member including a second spiral wrap cooperating with the first spiral wrap to define first and second fluid pockets therebetween, the first and second fluid pockets in communication with the first and second bypass passages, respectively;a partition plate disposed within the shell and separating the discharge-pressure region from the suction-pressure region, the partition plate including an opening in communication with the discharge-pressure region, the first scroll member including a hub through which the discharge passage extends;a bypass valve member disposed around the hub and movable between a first position in which the bypass valve member restricts fluid flow ...

Variable Volume Ratio Compressor

A compressor may include a shell, first and second scroll members, a partition plate and a bypass valve member. The shell defines a discharge-pressure region and a suction-pressure region. The first scroll member is disposed within the shell and may include a first end plate having a discharge passage, and first and second bypass passages extending through the first end plate. The partition plate is disposed within the shell and separates the discharge-pressure region from the suction-pressure region and includes an opening in communication with the discharge-pressure region. The bypass valve member is movable between a first position restricting fluid flow through at least one of the first and second bypass passages and the opening and a second position in allowing fluid flow through the at least one of the first and second bypass passages and the opening.

SCREW COMPRESSOR

A screw compressor includes a screw rotor, a rotor casing accommodating the screw rotor, and an internal-volume-ratio-adjusting valve capable of changing internal volume ratio. The internal-volume-ratio-adjusting valve includes a valve body movable along an axial direction of the screw rotor and defining a gas-discharge position, and a cylinder containing at least one pressurizing chamber with a cylinder rod and a piston. The cylinder rod is coupled to the valve body and disposed along the axial direction. The piston is fixed inside the pressurizing chamber to the cylinder rod and divides the pressurizing chamber into two pressurizing spaces along the axial direction. The screw compressor further includes a first communication passage connecting one of the two pressurizing spaces with the discharge gas passage, and a second communication passage connecting the other with a just-before-discharge tooth space immediately before a tooth space that communicates with the discharge port. 1. A screw compressor comprising:a screw rotor including a pair of a male rotor and a female rotor;a rotor casing accommodating the screw rotor, the rotor casing having a suction gas passage and a suction port through which a gas is sucked and a discharge port and a discharge gas passage through which the gas is discharged; andan internal-volume-ratio adjusting valve capable of changing an internal volume ratio, a valve body disposed inside the rotor casing, the valve body being movable along an axial direction of the screw rotor and defining a discharge position at which the gas is discharged from tooth spaces formed between the screw rotor and the rotor casing to the discharge port; and', 'a cylinder containing at least one pressurizing chamber and having a cylinder rod and a piston, the cylinder rod being coupled to the valve body and being disposed along the axial direction of the screw rotor, the piston being fixed inside the or each pressurizing chamber to the cylinder rod and ...

VARIABLE-CAPACITY COMPRESSOR AND REFRIGERATION DEVICE HAVING SAME

The present disclosure relates to a variable-capacity compressor () and a refrigeration device (). The variable-capacity compressor () comprises a housing (), a compression mechanism, two first suction conduits () and a variable-capacity valve (); the compression mechanism comprises two bearings () and a cylinder assembly, the cylinder assembly comprises a first cylinder () and a second cylinder (), at least one of the first cylinder () and the second cylinder () is configured as a variable-capacity cylinder, and a compression chamber () and a suction port (A) is formed in the variable-capacity cylinder; the variable-capacity valve () is disposed in the compression mechanism and configured to be movable between a communication position and an isolation position, wherein the variable-capacity cylinder operates when the variable-capacity valve () is located in the communication position, and the variable-capacity cylinder is unloaded when the variable-capacity valve () is located the isolation position. 1. A variable-capacity compressor , comprising:a housing;a compression mechanism disposed in the housing and comprising two bearings and a cylinder assembly disposed between the two bearings, in which the cylinder assembly comprises a first cylinder and a second cylinder, at least one of the first cylinder and the second cylinder is configured as a variable-capacity cylinder, and a compression chamber and a suction port is formed in the variable-capacity cylinder;two first suction conduits connected to the first cylinder and the second cylinder respectively; anda variable-capacity valve disposed in the compression mechanism and configured to be movable between a communication position where the compression chamber is communicated with the suction port and an isolation position where the compression chamber is isolated from the suction port,wherein the variable-capacity cylinder operates when the variable-capacity valve is located in the communication position, and the ...

SCREW COMPRESSOR

A screw compressor includes an internal-volume-ratio variable mechanism including a variable Vi valve configured to make a Vi value being an internal volume ratio variable. The screw compressor controls a position of the variable Vi valve in two stages. The position of the variable Vi valve when the Vi value is set to be large is set to attain a Vi value with which a compressor efficiency during operation under a predetermined high-load condition or a predetermined high-compression-ratio condition is equal to or higher than a set efficiency set in advance. 1. A screw compressor comprising an internal-volume-ratio variable mechanism including a variable Vi valve configured to make a Vi value being an internal volume ratio variable ,wherein the screw compressor controls a position of the variable Vi valve in two stages, andwherein, in an operation range of the compressor, the position of the variable Vi valve when the Vi value is set to be large is set to attain a Vi value with which a compressor efficiency during operation under a predetermined high-load condition or a predetermined high-compression-ratio condition is equal to or higher than a set efficiency set in advance.2. (canceled)3. The screw compressor of claim 1 ,wherein the position of the variable Vi valve when the Vi value is set to be small is set to attain a Vi value with which a value obtained by multiplying each of coefficients of performance at top one to top three operation loads having large weights in a primary annual performance factor calculated by applying weights for four operation loads, by the weight corresponding to the operation load is equal to or greater than a set value set in advance.4. The screw compressor of claim 1 ,wherein the internal-volume-ratio variable mechanism includesa piston coupled to the variable Vi valve; anda cylinder configured to house the piston,wherein inside of the cylinder is divided into two spatial chambers by the piston, andwherein the two spatial chambers are ...

Displacement pump

To provide a displacement pump that can be assembled while properly maintaining side clearances. The displacement pump (100, 101, 102, 103, 104, 105) of the present invention for sucking and discharging a fluid such as gasoline vapor by changing pressure in a space constituted by an outer peripheral surface of a rotor (1) and an inner wall surface of a casing (2), comprising a side clearance adjusting member (4), rotating with respect to the pump main body (6), for moving a shaft (3) integrally formed with the rotor (1) in an axial direction of the shaft (3).

VARIABLE ECONOMIZER INJECTION POSITION

A compressor includes a bore, a rotor disposed within the bore, a compressor inlet, a compressor outlet and a compression chamber defined between the bore and the rotor. A volume of the compression chamber gradually reduces from the compressor inlet to the compressor outlet. An economizer is configured to fluidically connect to the compression chamber. The economizer is configured to inject a working fluid into the compression chamber at an injection position. The injection position is changeable according to a working condition of the compressor. 1. A single compressor , comprisinga bore,a rotor disposed within the bore,a shaft supporting the rotor, the shaft extending in an axial direction,a compressor inlet,a compressor outlet,a compression chamber defined between the bore and the rotor, wherein a working fluid in the compression chamber is compressed and flows from the compressor inlet to the compressor outlet, andan injection port having a variable injection position along the axial direction.2. The compressor according to claim 1 , wherein the injection port is configured to fluidically connect to an economizer to receive the working fluid from the economizer to the compression chamber.3. The compressor according to claim 1 , wherein the injection port is formed by a manifold claim 1 , the manifold is configured to fluidically connect an economizer and the compression chamber claim 1 , the manifold includesa manifold inlet,two or more manifold outlets disposed downstream of the manifold inlet, the manifold outlets disposed upstream of the compression chamber.4. The compressor according to claim 1 , further comprising a manifold fluidically connecting the economizer and the compression chamber claim 1 , the manifold further including claim 1 ,a manifold inlet,a plurality of manifold outlets disposed downstream of the manifold inlet, the manifold outlets disposed upstream of the compression chamber, wherein each manifold outlet is disposed at a different ...

Compressor Having Capacity Modulation Assembly

A compressor may include a shell, first and second scrolls, a seal assembly, a modulation control chamber, and a modulation control valve. The first scroll may include a first end plate having a biasing passage extending therethrough. The seal assembly may isolate a discharge pressure region from a suction pressure region. The seal assembly and the first scroll may define an axial biasing chamber therebetween that communicates with the axial biasing chamber and a first pocket between the first and second scrolls. The modulation control chamber may be fluidly coupled with the biasing chamber by a first passage. The modulation control valve may be fluidly coupled with the modulation control chamber by a second passage and movable between a first position allowing communication between the second passage and the suction pressure region and a second position restricting communication between the second passage and the suction pressure region. 1. A compressor comprising:a shell assembly defining a suction-pressure region and a discharge-pressure region, said shell assembly including a partition separating said suction-pressure region from said discharge-pressure region;a first scroll member disposed within said shell assembly and including a first end plate having a discharge passage, a modulation port, a biasing passage, and a first spiral wrap extending from said first end plate;a second scroll member disposed within said shell assembly and including a second end plate having a second spiral wrap extending therefrom, said first and second spiral wraps meshingly engaged and forming a series of pockets during orbital displacement of said second scroll member relative to said first scroll member, said modulation port in communication with a first one of said pockets, said biasing passage in communication with a second one of said pockets;a floating seal assembly engaged with said partition and said first scroll member and isolating said discharge-pressure region from said ...

SCREW COMPRESSOR AND CONTROL METHOD THEREFOR

A screw compressor (), comprising a screw rotor () and a spool valve (). The screw rotor () comprises a suction head end () and an exhaust tail end (). Gas is sucked in from the suction head end () and compressed gas is discharged from the exhaust tail end (). The spool valve () comprises a working side () for sealing a compression chamber of the screw rotor (). The working side () comprises a spool valve head end () and a spool valve tail end () and can do a reciprocating motion along the axis direction of the screw rotor (). When the spool valve () moves to a suction capacity adjusting position (), the spool valve head end () is located at the inner side of the suction head end () of the screw rotor (), and a suction capacity adjusting distance (D) is formed between the spool valve head end () and the suction head end () so that the suction capacity of the screw compressor is adjusted. The suction capacity of the screw compressor () can be adjusted by means of the spool valve (), so that the problem of motor temperature and exhaust gas temperature limits of conventional variable frequency screw sets is effectively solved and the operational range and the load regulation ability of the screw compressor are expanded. 1100. Screw compressor () , characterized in that it comprises:{'b': ['110', '111', '112', '110', '111', '112'], '#text': 'a screw rotor (), which comprises a suction head end () and an exhaust tail end (), wherein the screw rotor () is configured as such that it can suck in gas from the suction head end () and discharge compressed gas from the exhaust tail end (); and'}{'b': ['120', '125', '103', '110', '125', '121', '122', '121', '122', '111', '112', '110', '110', '120', '110'], '#text': 'a spool valve (), which comprises a working side () for sealing a compression chamber () of the screw rotor (), wherein the working side () comprises a spool valve head end () and a spool valve tail end (), the spool valve head end () and the spool valve tail end () ...

ELECTRONIC CAPACITY CONTROL VALVE FOR PORTABLE SCREW COMPRESSOR

A spiral valve and a screw compressor having a compressor housing and the spiral valve are provided. The spiral valve includes an actuator module disposed adjacent an exterior of the compressor housing, the actuator module includes an electric motor, a gearbox mechanically coupled to the electric motor to transmit torque from the electric motor, a shutter coupled to the gearbox to rotate in response to a transmitted torque from the electric motor, wherein the shutter is positioned to open and close one or more of a plurality of bypass ports formed in the compressor housing based on the rotational position of the shutter, wherein the compression length of the screw compressor may be controlled by controlling the opening and closing of the one or more bypass ports. 1. A spiral valve for a screw compressor having a compressor housing , the spiral valve comprising: an electric motor;', 'a gearbox mechanically coupled to the electric motor to transmit a torque from the electric motor;, 'an actuator module disposed adjacent an exterior of the compressor housing, the actuator module comprisinga shutter coupled to the gearbox to rotate in response to the transmitted torque from the electric motor, wherein the shutter is positioned to open and close one or more of a plurality of bypass ports formed in the compressor housing based on a rotational position of the shutter,wherein a compression length of the screw compressor may be controlled by controlling the opening and closing of the one or more bypass ports.2. The spiral valve of claim 1 , wherein the plurality of bypass ports includes a first bypass port and a second bypass port adjacent to the first bypass port;within a distance between the first bypass port and the second bypass port is less than 120% of a manufacturing tolerance of the compressor housing, and greater than or equal to 100% of the manufacturing tolerance of the compressor housing.3. The spiral valve of claim 1 , wherein the plurality of bypass ports ...

SCREW COMPRESSOR WITH ADJUSTABLE INTERNAL VOLUME RATIO

A screw compressor is provided having adjustable internal volume ratio, including a body and a male rotor, a female rotor and a slide valve configured inside the body, a groove being configured at one side of the male rotor and the female rotor, and the slide valve being configured inside the groove with the slide valve movable inside the groove from a first position corresponding to a minimum internal volume ratio to a second position corresponding to a maximum internal volume ratio. 1. A screw compressor having adjustable internal volume ratio , comprises a body and a male rotor , a female rotor and a slide valve inside said body , a groove being configured at one side of said male rotor and said female rotor , said slide valve being configured inside said groove , wherein said slide valve is able to move inside said groove from a first position corresponding to a minimum internal volume ratio to a second position corresponding to a maximum internal volume ratio.2. A screw compressor with adjustable internal volume ratio according to claim 1 , wherein said slide valve is able to move to a third position corresponding to a middle internal volume ratio between said first position and said second position.3. A screw compressor with adjustable internal volume ratio according to claim 2 , wherein said female rotor and said male rotor have a suction end and an exhaust end claim 2 , said slide valve has a first end and a second end claim 2 , with said first end next to said suction ends and said second end next to said exhaust ends claim 2 , and a radial exhaust port being configured at said second end of said slide valve.4. A screw compressor with adjustable internal volume ratio according to claim 3 , wherein said first position is a position where said first end extends outside said suction ends claim 3 , while said second end does not extend outside said exhaust ends claim 3 , said second position is a position where said first end is level with said suction ends ...

Improved inlet port configuration for roots-type supercharger

A supercharger having twisted meshing rotors sealingly contained within a housing having an inlet port to admit air into the meshing rotors and an outlet port to expel air from the meshing rotors, the rotors having mesh points where the rotors contact one another and spaces between their mesh points to accept air from the inlet port and propel it to the outlet port as the rotors are rotated and the mesh points travel axially, the housing, inlet and rotors defining an angle known as the seal transfer angle which is greater than or equal to zero degrees when the inlet port is closed and the volume of air between rotors is sealed and has no leakage path. In the described supercharger the housing, rotors and inlet port are configured to have a negative seal transfer angle of, e.g., −10 to −40 degrees or more, up to the maximum available, and to provide a leakage path for an angular portion of the rotors' rotation, improving high end performance without degrading low end performance

CONTROL DEVICE FOR INTERNAL COMBUSTION ENGINE

A control device for an internal combustion engine is provided which enables control of dilution of oil by fuel and water drops, i.e., control of the amount of so-called oil dilution. The control device for an internal combustion engine that is lubricated or cooled by oil includes: a variable displacement oil pump capable of varying the amount of discharge of the oil; an air-fuel ratio sensor for sensing an air-fuel ratio of the internal combustion engine; and an ECU for controlling the amount of discharge of the variable displacement oil pump. The ECU controls the amount of discharge of the variable displacement oil pump, based on the air-fuel ratio sensed by the air-fuel ratio sensor. 1. A control device for an internal combustion engine that is lubricated or cooled by oil , comprising:a variable displacement oil pump configured to vary an amount of discharge of the oil;an air-fuel ratio sensing unit configured to sense an air-fuel ratio of the internal combustion engine; anda control unit configured to control the amount of discharge of the variable displacement oil pump,wherein the control unit is configured to control the amount of discharge of the variable displacement oil pump, based on the air-fuel ratio sensed by the air-fuel ratio sensing unit.2. The control device for the internal combustion engine according to claim 1 , further comprising a temperature sensing unit configured to sense a temperature of the internal combustion engine claim 1 ,wherein the control unit is configured to control the amount of discharge of the variable displacement oil pump, based on the air-fuel ratio sensed by the air-fuel ratio sensing unit and the temperature of the internal combustion engine sensed by the temperature sensing unit.3. The control device for the internal combustion engine according to claim 2 , wherein the control unit is configured to provide control so as to increase the amount of discharge of the variable displacement oil pump when the air-fuel ratio is ...

Single screw compressor

A single screw compressor comprises a main rotor and at least one gate rotor, a casing for the main rotor having a discharge port at a discharge end of the casing, and a slide slidable within a bore in the casing adjacent the main rotor. The slide has a cut-out (6) between first (2) and second (4) sealing parts of the slide, the slide is slidable between a high volume ratio position where the cut-out (6) is within the casing and provides a path to the discharge port, and a low volume ratio position where the slide is beyond the discharge end of the casing to provide a fixed discharge path in the bore of the casing.

SUCTION SIDE SLIDE VALVE FOR A SCREW COMPRESSOR

The present disclosure is directed to a screw compressor system having a rotor housing with a pair of screw rotors rotatably supported within a compression chamber. A suction side slide valve is in fluid communication with an inlet to the compression chamber. The suction side slide valve is movable between a closed position and a fully open position to define a variable suction side inlet volume for controlling capacity of the compressor. 1. A compressor system comprising:a rotor housing;a compression chamber positioned within the housing, the compression chamber having a suction side and a discharge side;male and female screw rotors rotatably meshed together within the compression chamber, the screw rotors operable for compressing a working fluid;an inlet opening connected to the housing upstream of the compression chamber;a discharge port connected to the housing downstream of the compression chamber;an inlet port defined between the housing and the screw rotors on the suction side of the housing prior to fluid compression; anda suction side slide valve operably connected to the housing, the slide valve movable between first and second positions defined as fully closed and fully open to vary the size of the inlet port.2. The compressor system of claim 1 , wherein the slide valve is movable to an intermediate position at any location between the first and second positions.3. The compressor system of claim 2 , wherein the compressor operates at a full load claim 2 , a part load and unloaded when the slide valve is in the first position claim 2 , an intermediate position and the second position claim 2 , respectively.4. The compressor system of claim 1 , wherein the slide valve is defined by a top wall extending between first and second side walls and male and female rotor interface walls opposite of the top wall.5. The compressor system of further comprising:a guide channel formed in the top wall of the slide valve;a first slide groove formed in the first side of ...

INTEGRATED PRESSURE PLATE AND PORT PLATE FOR PUMP

An integrated pressure plate and port plate, and method of forming same, for a pump includes a housing having a pumping chamber formed therein. The housing includes first and second metal pressure plate portions that form at least a portion of the pumping chamber wherein at least one of the first and second pressure plate portions has a hard coating formed of a different material than a remainder of the housing metal on a surface thereof where integrated ports are formed on surface(s) of the pressure plate portion(s). Surface irregularities relieve stresses and promote adhesion of the coating (e.g., tungsten carbide) to the underlying metal (aluminum alloy). 1. A pump assembly comprising:a housing having a pumping chamber formed therein, the housing including first and second metal pressure plate portions that form at least a portion of the pumping chamber wherein at least one of the first and second pressure plate portions has a hard coating formed of a different material than a remainder of the housing metal on a surface thereof where integrated ports are formed in surfaces of the pressure plate portions; anda rotor received in the pumping chamber for rotation relative to the housing.2. The pump assembly of wherein the each of the first and second pressure plate portions includes the hard coating that forms at least a portion of the pumping chamber.3. The pump assembly of wherein the coating is tungsten carbide.4. The pump assembly of wherein the first and second pressure plate portions include preselected surface irregularities to relieve stresses and promote adhesion of the tungsten carbide coating to the underlying metal.5. The pump assembly of wherein the housing is an aluminum or aluminum alloy.6. The pump assembly of wherein the coating is tungsten carbide and in which integrated port plate features are formed.7. The pump assembly of wherein the metal of the first and second pressure plate portions includes preselected surface irregularities to relieve ...

Variable Volume Ratio Compressor

A compressor may include a shell assembly, first and second scrolls, and a valve assembly. The shell assembly may define a discharge chamber. The first scroll may be disposed within the discharge chamber and may include a first end plate and a first spiral wrap. The first end plate may include a discharge passage in communication with the discharge chamber. The second scroll may be disposed within the discharge chamber and may include a second end plate and a second spiral wrap. The first and second spiral wraps define fluid pockets therebetween. The second end plate may include a port selectively communicating with one of the fluid pockets. The valve assembly may be mounted to the second scroll and may include a valve member that is movable between open and closed positions to allow and restrict communication between the port and the discharge chamber.

A SILENT GEAR PUMP OR MOTOR SUPPRESSING TROUBLES OF TRAPPING FLUID

Fluid delivery devices using a pair of meshed external gears, in spite of no reciprocating component for fluid delivery enabling low rotational vibration, the high noise due to the trapping phenomenon, and the teeth bouncing contact due to undesired large backlash heretofore afforded in the gear manufacturing process, restrict the employments in the industrial field requiring quiet environment such as electric motor vehicles or room services. 1. A gear pump or motor comprising a shaft gear and a driven gear meshed rotatably within a gear chamber formed with a housing and opposite side walls , which delivers fluids from an inlet chamber to an outlet chamber; a backlash of the said meshed gears having fluid-leak-tight clearance; a closed chamber provided in an internal portion of at least a said side wall; an opening provided on a said side wall from which a communication passage extends to a said closed chamber; and at least an elastic disc capsule contained in the said closed chamber , comprising a pair of concaved elastic disc plates abutted and sealed against each other with gas inside , of which occupying volume varies elastically subject to the fluid pressure therein enabling to absorb or expel the squeezed fluid in the trapped interstice during the trapping period of the interstice , whereby the fluid entrapped in the said interstice isolated by the fluid-leak-tight backlash suppressing the pressure transmission inwardly or outwardly , whereof volumetric variation during the trapping period is compensated by the compression or expansion of the said elastic disc capsule , suppressing pressure pulse and air bubble generation and eliminating the teeth bouncing contact.2. A gear pump or motor comprising a shaft gear and a driven gear meshed rotatably within a gear chamber formed with a housing and opposite side walls , which delivers fluids from an inlet chamber to an outlet chamber; a backlash of meshed gears having fluid-leak-tight clearance , whereby , during ...

Dual-Stage Compressor, Control Method Thereof and Air Conditioning Unit

The present disclosure relates to a dual-stage compressor, a control method thereof, and an air conditioning unit. The dual-stage compressor includes a low-pressure stage; a high-pressure stage connected in series with the low-pressure stage; and a volume ratio adjustment mechanism arranged at the high-pressure stage and configured to adjust the volume ratio of refrigerant compression at the high-pressure stage. When the final compression pressure of the compressor is lower or greater than the exhaust pressure, the volume ratio adjustment mechanism is operated to increase or reduce the volume ratio of refrigerant compression at the high-pressure stage so that the final compression pressure of the compressor is equal to the exhaust pressure, and overcompression and undercompression are improved to adapt to changes in external conditions, increase the energy efficiency of the compressor, and reduce the noise of the compressor. 1. A dual-stage compressor , comprising:a low-pressure stage;a high-pressure stage connected in series with the low-pressure stage; anda volume ratio adjustment mechanism arranged at the high-pressure stage and configured to adjust the volume ratio of refrigerant compression at the high-pressure stage.2. The dual-stage compressor according to claim 1 , wherein the compressor is a screw compressor claim 1 , and the volume ratio adjustment mechanism comprises a first slide valve adjustment mechanism configured to adjust an output position of an exhaust port at the high-pressure stage.3. The dual-stage compressor according to claim 1 , further comprising a capacity adjustment mechanism arranged at the low-pressure stage and configured to adjust an output capacity of refrigerant compression at the low-pressure stage.4. The dual-stage compressor according to claim 3 , wherein the capacity adjustment mechanism comprises a second slide valve adjustment mechanism configured to adjust the output capacity of a bypass port at the low-pressure stage.5. The ...

Compressor Having Capacity Modulation Assembly

A compressor may include a shell, first and second scrolls, a seal assembly, a modulation control chamber, and a modulation control valve. The first scroll may include a first end plate having a biasing passage extending therethrough. The seal assembly may isolate a discharge pressure region from a suction pressure region. The seal assembly and the first scroll may define an axial biasing chamber therebetween that communicates with the axial biasing chamber and a first pocket between the first and second scrolls. The modulation control chamber may be fluidly coupled with the biasing chamber by a first passage. The modulation control valve may be fluidly coupled with the modulation control chamber by a second passage and movable between a first position allowing communication between the second passage and the suction pressure region and a second position restricting communication between the second passage and the suction pressure region.

COMPRESSOR

A compressor includes a rotary shaft, a front rotor including a front rotor surface, an intermediate wall portion including a first wall surface opposed to the front rotor surface in an axial direction, and a vane that is inserted into a vane groove formed in the intermediate wall portion and is moved in the axial direction with rotation of the front rotor. The vane includes a first vane end that is an end in the axial direction and contacts the front rotor surface. The first vane end is curved so as to be convex toward the front rotor surface and extends in the direction perpendicular to the axial direction. The front rotor surface includes a front curving surface curved in the axial direction so as to be displaced in the axial direction in accordance with its angular position. 1. The compressor according to claim 10 , wherein a concave surface curved in the axial direction so as to be concave toward the wall surface, and', 'a convex surface curved in the axial direction so as to be convex toward the wall surface,, 'the curving surface includes'}the concave surface includes a concave surface radially inner end and a concave surface radially outer end as opposite ends in the radial direction,in the concave surface, a radius of curvature of the concave surface radially inner end in the axial direction is smaller than a radius of curvature of the concave surface radially outer end,the convex surface includes a convex surface radially inner end and a convex surface radially outer end as opposite ends in the radial direction, andin the convex surface, a radius of curvature of the convex surface radially inner end in the axial direction is smaller than a radius of curvature of the convex surface radially outer end.2. The compressor according to claim 1 , whereinthe vane includes a tabular shape having a thickness in a direction perpendicular to both the axial direction and the longitudinal direction of the vane end, andthe thickness of the vane is set such that the vane ...

CAPACITY MODULATED SCROLL COMPRESSOR

A capacity modulation assembly is provided and may include a control valve and a first line extending between the control valve and a suction pressure region disposed within a compressor shell, whereby the suction pressure region is in communication with a suction inlet gas fitting extending through a shell of a compressor. The capacity modulation assembly may additionally include a second line extending between the control valve and an intermediate pressure region disposed within the compressor shell, whereby the intermediate pressure region is in communication with compression pockets defined between an orbiting scroll and a non-orbiting scroll. 1. A compressor comprising:a shell defining an opening that receives a suction gas inlet fitting in communication with a suction pressure region disposed within the shell;a bearing housing fixed relative to the shell;a compression mechanism located within the shell, supported on the bearing housing and in communication with the suction pressure region, the compression mechanism including an orbiting scroll and a non-orbiting scroll that include spiral wraps defining compression pockets therebetween, at least one of the orbiting scroll and the non-orbiting scroll defining an intermediate passage that provides communication between the compression pockets and an intermediate pressure region disposed within the shell; anda capacity modulation assembly including a first control valve, a first line, and a second line, the first line extending between the suction pressure region and the first control valve, the second line extending between the intermediate pressure region and the first control valve, the first control valve selectively opening to provide communication between the intermediate pressure region and the suction pressure region and thereby separate the orbiting scroll and the non-orbiting scroll to reduce the capacity of the compressor.2. The compressor of claim 1 , wherein the first control valve is disposed ...

CONTROL VALVE FOR VARIABLE DISPLACEMENT COMPRESSOR

A control valve includes: a first valve to control a flow rate of refrigerant flowing from a discharge chamber to a control chamber of a compressor; a second valve to control a flow rate of the refrigerant flowing from the control chamber to a suction chamber; a solenoid to generate a drive force in a first valve closing direction and a second valve opening direction; a biasing member to generate a biasing force in an first valve opening direction and a second valve closing direction; and a pressure sensing part to sense a pressure in the suction chamber or the control chamber, and generate a counterforce against the drive force. A state in which both of the first and second valves are open is present during an increase in the current supplied to the solenoid from zero to an upper limit current value, and an increase rate of an opening degree of the first valve is increased during a decrease in the current supplied to the solenoid, a predetermined lower limit current value being an inflection point of the increase. 1. A control valve applicable to a variable displacement compressor having a suction chamber , a discharge chamber , and a control chamber and having a discharge capacity varied by regulating a pressure in the control chamber , the control valve comprising:a first valve provided between the discharge chamber and the control chamber, to control a flow rate of refrigerant flowing from the discharge chamber to the control chamber;a second valve and a third valve provided parallel to each other between the control chamber and the suction chamber, to control a flow rate of the refrigerant flowing from the control chamber to the suction chamber;a solenoid to generate a drive force in a closing direction of the first valve and an opening direction of the second valve depending on an amount of supplied current; anda pressure sensing part to sense a pressure in the suction chamber or the pressure in the control chamber, and generate a counterforce against the ...

Rotary compressors with variable speed and volume control

Systems and methods are used to control operation of a rotary compressor of a refrigeration system to improve efficiency by varying the volume ratio and the speed of the compressor in response to current operating and load conditions. The volume of the axial and/or radial discharge ports of the compressor can be varied to provide a volume ratio corresponding to operating conditions. In addition, permanent magnet motors and/or control of rotor tip speed can be employed for further efficiency gains.

Compressor Having Capacity Modulation Assembly

A compressor may include a shell, first and second scrolls, a seal assembly, a modulation control chamber, and a modulation control valve. The first scroll may include a first end plate having a biasing passage extending therethrough. The seal assembly may isolate a discharge pressure region from a suction pressure region. The seal assembly and the first scroll may define an axial biasing chamber therebetween that communicates with the axial biasing chamber and a first pocket between the first and second scrolls. The modulation control chamber may be fluidly coupled with the biasing chamber by a first passage. The modulation control valve may be fluidly coupled with the modulation control chamber by a second passage and movable between a first position allowing communication between the second passage and the suction pressure region and a second position restricting communication between the second passage and the suction pressure region. 1. A compressor comprising:a shell assembly defining a suction-pressure region and a discharge-pressure region, said shell assembly including a partition separating said suction-pressure region from said discharge-pressure region;a first scroll member disposed within said shell assembly and including a first end plate having a discharge passage, a modulation port, and a first spiral wrap extending from said first end plate;a second scroll member disposed within said shell assembly and including a second end plate having a second spiral wrap extending therefrom, said first and second spiral wraps meshingly engaged and forming a series of pockets during orbital displacement of said second scroll member relative to said first scroll member, said modulation port in communication with a first one of said pockets;a floating seal assembly engaged with said partition and isolating said discharge-pressure region from said suction-pressure region, said floating seal assembly defining an axial biasing chamber containing intermediate-pressure ...

METHOD OF IMPROVED CONTROL FOR VARIABLE VOLUME RATIO VALVE

Variable volume ratio compressors may be controlled using a switching parameter based on compressor speed and suction density to improve the matching of compressor volume ratio to desired discharge conditions. Delay periods may be implemented in the determination of when to change volume ratio to control the frequency of changes to the volume ratio. The switching parameter may be a product of the compressor speed and suction density. The volume ratio of the compressor may be controlled by switching valves directing pressure to a piston of a variable volume ratio system of the compressor. 1. A compressor system , comprising:a variable volume ratio compressor configured to be operated at one of a plurality of different volume ratios and having a suction; and obtain a speed of operation of the variable volume ratio compressor and a refrigerant density at the suction of the variable volume ratio compressor;', 'determine a switching parameter based on the speed of operation and the refrigerant density;', 'determine whether to change a volume ratio of the variable volume ratio compressor based on a switching condition and the switching parameter; and', 'when it is determined to change the volume ratio, direct a change in the volume ratio that the variable volume ratio compressor is operated at., 'a controller configured to2. The compressor system of claim 1 , wherein the plurality of different volume ratios is two different volume ratios.3. The compressor system of claim 1 , further comprising one or more sensors located at the suction of the variable volume ratio compressor claim 1 , and wherein the controller obtains the refrigerant density based on outputs from the one or more sensors.4. The compressor system of claim 1 , wherein the outputs from the one or more sensors include a suction pressure and a suction temperature.5. The compressor system of claim 1 , wherein the switching parameter determined by the controller is a product of the speed of operation and the ...

VARIABLE VOLUME RATIO SCREW COMPRESSOR

A screw compressor, method of operating, and refrigerant circuit are disclosed. The screw compressor includes a suction inlet that receives a working fluid to be compressed. A compression mechanism is fluidly connected to the suction inlet that compresses the working fluid. A discharge outlet is fluidly connected to the compression mechanism that outputs the working fluid following compression by the compression mechanism. A valve assembly is configured to vary a location at which the compression mechanism compresses the working fluid, the valve assembly being disposed to modify a suction location of the screw compressor. 1. A screw compressor , comprising:a suction inlet that receives a working fluid to be compressed;a compression mechanism fluidly connected to the suction inlet that compresses the working fluid, the compression mechanism including one or more rotors;a rotor housing containing the one or more rotors;a discharge outlet fluidly connected to the compression mechanism that outputs the working fluid following compression by the compression mechanism; and a suction port of the compression mechanism is closer to a discharge end of the rotor housing in the first position than in the second position, and', 'a longitudinal length along which the compression mechanism compresses the working fluid is longer in the second position than in the first position., 'a rotor sealing member configured to move relative to the rotor housing between a first position and second position, wherein'}2. The screw compressor of claim 1 , wherein the suction port is an axial suction port claim 1 , and the location at which the compression mechanism receives the working fluid is variable for the axial suction port.3. The screw compressor of claim 1 , wherein the rotor sealing member is part of a slide piston assembly configured to move in a direction that is parallel to a longitudinal axis of the compression mechanism claim 1 , and the second position disposes the rotor sealing ...

Compressor Having Capacity Modulation Assembly

A compressor may include first and second scrolls, and an axial biasing chamber. Spiral wraps of the scrolls mesh with each other and form compression pockets including a suction-pressure compression pocket, a discharge-pressure compression pocket, and intermediate-pressure compression pockets. The axial biasing chamber may be disposed axially between the second end plate and a component. Working fluid disposed within the axial biasing chamber may axially bias the second scroll toward the first scroll. The second end plate includes outer and inner ports. The outer port is disposed radially outward relative to the inner port. The outer port may be open to a first one of the intermediate-pressure compression pockets and in selective fluid communication with the axial biasing chamber. The inner port may be open to a second one of the intermediate-pressure compression pockets and in selective fluid communication with the axial biasing chamber. 1. A compressor comprising:a first scroll including a first end plate and a first spiral wrap extending from the first end plate;a second scroll including a second end plate and a second spiral wrap extending from the second end plate, the first and second spiral wraps meshing with each other and forming a plurality of compression pockets therebetween;an axial biasing chamber disposed axially between the second end plate and a floating seal assembly, wherein the floating seal assembly at least partially defines the axial biasing chamber; anda valve assembly in communication with the axial biasing chamber and movable between a first position providing fluid communication between a first pressure region and the axial biasing chamber and a second position providing fluid communication between a second pressure region and the axial biasing chamber,wherein the second pressure region is at a higher pressure than the first pressure region.2. The compressor of claim 1 , wherein the first pressure region is a first intermediate-pressure ...

COMPRESSOR STOP VALVE AND ASSOCIATED SYSTEM

A compressor system is provided that includes a contact cooled compressor and a coolant separator. The coolant separator is used to remove coolant fluid from a compressed flow stream produced by the contact cooled compressor during its operation. The coolant separator routes the removed coolant fluid back to the contact cooled compressor for further use. In some forms the coolant fluid is cooled prior to delivery back to the compressor. A stop valve can be provided in the coolant fluid return line to halt the flow of the fluid. A pressure sensitive member can be disposed to sense pressure of the coolant fluid that has been routed past the stop valve. Operation of the compressor can be changed as a result of the sensed pressure from the pressure sensitive member. Information from a temperature sensitive member can also be used to change operation of the compressor. 121.-. (canceled)22. A compressor assembly comprising:a compressor configured to raise a pressure of a compressible fluid, the compressor configured to employ oil within the compressor to lubricate at least one compressor elements;an oil reservoir coupled with the compressor via a conduit, the conduit configured to convey oil under pressure to the compressor from the oil reservoir;a controller configured to control operation of the compressor; anda temperature sensor in thermal communication with oil conveyed by the conduit to determine a temperature of the oil, the temperature determined by the temperature sensor being biased to provide an estimated temperature,wherein the controller is configured to cause operation of the compressor to halt when the controller determines that the estimated temperature exceeds an operational threshold temperature.23. The compressor assembly as recited in claim 22 , further comprising a valve coupled with the conduit between the oil reservoir and the compressor claim 22 , the valve operable to stop the flow of oil from the oil reservoir to the compressor.24. The compressor ...

COMPRESSOR

A variable capacity scroll compressor includes a fixed scroll. The fixed scroll of the compressor includes a bypass flow path configured to connect a suction unit to a compression unit, a cylinder space provided on the bypass flow path, and an on/off valve disposed to be movable back and forth in the cylinder space to open/close the bypass flow path according to a difference between a discharge pressure of the discharge unit and a suction pressure of the suction unit. Thus a capacity of the compressor may be reduced by connecting the suction unit to the compression unit under a low load condition in which a difference between a discharge pressure and a suction pressure is relatively less.

Infinitely variable vi in screw compressors using proportional valve control

A variable-efficiency screw compressor for use in a closed-loop system configured to perform refrigeration is provided. The variable-efficiency screw compressor includes an inlet port to draw refrigerant into the variable-efficiency screw compressor, one or more rotating screws in fluid communication with the inlet port to compress the refrigerant, forming a compressed refrigerant, a discharge port in fluid communication with the rotating screws to receive the compressed refrigerant and discharge the refrigerant, wherein the discharge port includes an adjustable piston movable within the discharge port from a first position in which volume is higher to a second position in which volume is lower, the adjustable piston arranged and disposed to adjust volume of the discharge port in response to a change in demand.

VANE PUMP

A vane cell pump with a rotor () rotatably mounted in an adjustable stroke ring () and driven by a drive shaft () and with several vanes () is proposed, which vanes are mounted in a radially displaceable manner in radially running slots () of the rotor () and are subjected to rear vane chamber pressure. In accordance with the invention, it is provided that at least one forced guide element is allocated to one vane () for the radial movement of the vane () in such a manner that the forced guide element is integrated into the rotor () and/or into the drive shaft () without any effect on installation space. 131241234432. Vane cell pump with a rotor () rotatably mounted in an adjustable stroke ring () and driven by a drive shaft () , and with several vanes () , which are mounted in a radially displaceable manner in radially running slots () of the rotor () and are subjected to rear vane chamber pressure , characterized in that at least one forced guide element is allocated to one vane () for the radial movement of the vane () in such a manner that the forced guide element is integrated into the rotor () and/or into the drive shaft () without any effect on installation space.212- (canceled) The present invention relates to a vane cell pump in accordance with the type more specifically described in the preamble of claim .Mechanical vane cell pumps with adjustable stroke rings are, for example, sufficiently known. With such vane cell pumps, a pressurization of the rear vane chamber is provided, in order to, in ongoing operation, subject the respective vanes to rear vane chamber pressure in such a manner that they are moved radially outwards. However, upon the start of the vane cell pump, the pump pressure initially must be built up, such that no rear vane chamber pressure is initially present. In addition, at low ambient temperatures, the problem arises that, due to the friction conditions, the vanes do not independently extend into the joining gap, and thus no pumping ...

COMPRESSOR WITH ROTATING CAM AND SLIDING END VANES

An apparatus for compressing or pumping fluid includes a housing having an interior chamber. A rotating cam is rotatably mounted within an interior chamber and includes a reversible cam body configured to enable fluid to flow in a foreword direction and a reverse direction. The reversible cam body has a first sloped annular channel formed therein. The first end of the reversible cam body includes a ramp up portion, a ramp down portion, and inner and outer circumferential sidewalls that circumscribe the ramp to define the first sloped annular channel. The apparatus may include a circumferential cam gear located on the outer circumferential sidewall and a secondary drive shaft with a pinion gear to rotate the circumferential cam gear. 1. An apparatus for compressing or pumping fluid , the apparatus comprising:a housing having an interior chamber, the housing including a first end wall on one side of the interior chamber, the first end wall having a fluid inlet and a fluid outlet;a rotating cam rotatably mounted within the interior chamber, the rotating cam comprising a reversible cam body configured to enable fluid to flow in a forward direction and a reverse direction, the reversible cam body having a first end located adjacent to the first end wall, the first end having a first sloped annular channel formed therein, the first end of the reversible cam body including a ramp up portion, a ramp down portion, and inner and outer circumferential sidewalls that circumscribe the ramp to define the first sloped annular channel; anda first end vane slidably mounted within a slot in the first end wall so as to extend into the first sloped annular channel for sliding therein as the rotating cam rotates, the first end vane being biased towards the ramp so as to divide the sloped annular channel into an inlet chamber and an outlet chamber such that, as the rotating cam rotates, the inlet chamber expands and communicates with the fluid inlet for receiving the fluid, and the ...

Variable Volume Ratio Compressor

A compressor may include a shell assembly, a non-orbiting scroll, and an orbiting scroll. The shell assembly may define a discharge chamber. The non-orbiting scroll includes a first end plate and a first spiral wrap extending from the first end plate. The first end plate may include a variable-volume-ratio port. The orbiting scroll may be disposed within the discharge chamber. The orbiting scroll includes a second end plate and a second spiral wrap extending from the second end plate and cooperating with the first spiral wrap to define a plurality of fluid pockets therebetween. The second end plate may include a discharge passage in communication with a radially innermost one of the fluid pockets and the discharge chamber. The variable-volume-ratio port may be disposed radially outward relative to the discharge passage and may be in selective communication with the radially innermost one of the fluid pockets. 1. A compressor comprising:a shell assembly defining a discharge chamber;a non-orbiting scroll including a first end plate and a first spiral wrap extending from the first end plate, the first end plate including a variable-volume-ratio port; andan orbiting scroll disposed within the discharge chamber and including a second end plate and a second spiral wrap extending from the second end plate and cooperating with the first spiral wrap to define a plurality of fluid pockets therebetween, the second end plate including a discharge passage, the discharge passage in communication with a radially innermost one of the fluid pockets and the discharge chamber,wherein the variable-volume-ratio port is disposed radially outward relative to the discharge passage and is in selective communication with the radially innermost one of the fluid pockets.2. The compressor of claim 1 , wherein the radially innermost one of the fluid pockets is in communication with the discharge chamber only through the discharge passage.3. The compressor of claim 2 , wherein the orbiting scroll ...

METHOD OF IMPROVED CONTROL FOR VARIABLE VOLUME RATIO VALVE

Variable volume ratio compressors may be controlled using a switching parameter based on compressor speed and suction density to improve the matching of compressor volume ratio to desired discharge conditions. Delay periods may be implemented in the determination of when to change volume ratio to control the frequency of changes to the volume ratio. The switching parameter may be a product of the compressor speed and suction density. The volume ratio of the compressor may be controlled by switching valves directing pressure to a piston of a variable volume ratio system of the compressor. 1. A compressor system , comprising:a variable volume ratio compressor configured to be operated at one of a plurality of different volume ratios and having a suction; and obtain a speed of operation of the variable volume ratio compressor and a refrigerant density at the suction of the variable volume ratio compressor;', 'determine a switching parameter based on the speed of operation and the refrigerant density;', 'determine whether to change a volume ratio of the variable volume ratio compressor based on a switching condition and the switching parameter; and', 'when it is determined to change the volume ratio, direct a change in the volume ratio that the variable volume ratio compressor is operated at., 'a controller configured to2. The compressor system of claim 1 , wherein the plurality of different volume ratios is two different volume ratios.3. The compressor system of claim 1 , further comprising one or more sensors located at the suction of the variable volume ratio compressor claim 1 , and wherein the controller obtains the refrigerant density based on outputs from the one or more sensors.4. The compressor system of claim 1 , wherein the outputs from the one or more sensors include a suction pressure and a suction temperature.5. The compressor system of claim 1 , wherein the switching parameter determined by the controller is a product of the speed of operation and the ...

VARIABLE VOLUME RATIO SCREW COMPRESSOR

A screw compressor, method of operating, and refrigerant circuit are disclosed. The screw compressor includes a suction inlet that receives a working fluid to be compressed. A compression mechanism is fluidly connected to the suction inlet that compresses the working fluid. A discharge outlet is fluidly connected to the compression mechanism that outputs the working fluid following compression by the compression mechanism. A valve assembly is configured to vary a location at which the compression mechanism compresses the working fluid, the valve assembly being disposed to modify a suction location of the screw compressor. 1. A screw compressor , comprising:a suction inlet that receives a working fluid to be compressed;a compression mechanism fluidly connected to the suction inlet that compresses the working fluid;a discharge outlet fluidly connected to the compression mechanism that outputs the working fluid following compression by the compression mechanism; anda valve assembly configured to vary a location at which the compression mechanism compresses the working fluid, the valve assembly being disposed to modify a suction location of the screw compressor.2. The screw compressor of claim 1 , wherein the location at which the compression mechanism receives the working fluid is variable for an axial suction port.3. The screw compressor of claim 1 , wherein the valve assembly is a slide piston assembly configured to move in a direction that is parallel to a longitudinal axis of the compression mechanism.4. The screw compressor of claim 1 , wherein the valve assembly is configured to move in a direction that is perpendicular to a longitudinal axis of the compression mechanism.5. The screw compressor of claim 1 , wherein the valve assembly is configured to adjust a location of a radial suction port.6. The screw compressor of claim 1 , further comprising a variable frequency drive.7. The screw compressor of claim 1 , wherein the valve assembly is actuatable based on a ...

Rotary Fluid Transfer Apparatus and Associated Methods

A fluid transfer device () and corresponding method of transferring fluid. The device () comprises an inner member () with a central axis () and comprising an outer surface (); and an outer member () coaxially arranged with the inner member () and comprising an inner surface () radially spaced from the outer surface of the inner member () to define a space between the inner () and outer members (). The device () has a first axial member and a second axial member. There is at least one variable fluid chamber () defined in the space, with a fluid inlet () to the at least one fluid chamber (); and a fluid outlet () from the at least one fluid chamber. At least one of the first and/or second axial member/s is rotatable about the central axis () to vary a volume of the at least one fluid chamber (). The volume of the at least one fluid chamber () corresponds to a rotational position of the first and/or second axial member/s. 1. A fluid transfer device comprising:an inner member with a central axis and comprising an outer surface;an outer member coaxially arranged with the inner member and comprising an inner surface radially spaced from the outer surface of the inner member to define a space between the inner and outer members;a first axial member;a second axial member;at least one fluid chamber defined in the space;a fluid inlet to the at least one fluid chamber; anda fluid outlet from the at least one fluid chamber;at least one of the first and/or second axial member/s being rotatable about the central axis to vary a volume of the at least one fluid chamber,2. The device as claimed in claim 1 , wherein the device comprises a pump.3. The device as claimed in claim 1 , wherein the volume of the at least one fluid chamber corresponds to a rotational position of the first and/or second axial member/s.4. The device as claimed in claim 1 , wherein the device or inner member comprises a throughbore.5. The device as claimed in claim 1 , wherein the fluid chamber is an annular ...

ROTARY PUMP WITH A PLASTIC COMPOSITE STRUCTURE

A rotary pump including: a housing having an inlet and an outlet for a fluid, and a delivery chamber connected to the inlet and outlet; a delivery rotor rotatable in the delivery chamber about a rotational axis has a structure which is central in relation to the rotational axis; and a setting structure surrounding the delivery rotor and with the delivery rotor forms delivery cells, delivering the fluid from the inlet to the outlet, can be moved back and forth relative to the delivery rotor, in order to adjust a delivery volume of the rotary pump. At least one of the setting structure and/or the rotor structure is a material composite structure including a moulded region made of plastic and a functional region which is fixedly connected to the moulded region and made of a functional material which has a different chemical composition to the plastic of the moulded region. 1. A rotary pump comprising:a housing which comprises an inlet and an outlet for a fluid and comprises a delivery chamber which is connected to the inlet and the outlet;a delivery rotor which can be rotated in the delivery chamber about a rotational axis and comprises a rotor structure which is central in relation to the rotational axis;and a setting structure which surrounds the delivery rotor and together with the delivery rotor forms delivery cells, in order to deliver the fluid from the inlet to the outlet, and can be moved back and forth relative to the delivery rotor in order to be able to adjust a specific delivery volume of the rotary pump;wherein at least one of the structures, i.e. the setting structure and/or the rotor structure, is a material composite structure and comprises a moulded region made of plastic and a functional region which is fixedly connected to the moulded region and made of a functional material which has a different chemical composition to the plastic of the moulded region.2. The rotary pump according to claim 1 , wherein the functional region reinforces and/or ...

Compressor Capacity Modulation System For Multiple Compressors

A system includes a plurality of compressors, an evaporator, an expansion device, and a system controller. The compressors may be linked in parallel. The system controller may: determine a saturated evaporator temperature, a saturated condensing temperature, and a target capacity demand; determine an estimated system capacity and an estimated power consumption for each compressor operating configuration; compare the estimated system capacity with the target capacity demand and an error tolerance value; select an optimum operating mode based on the comparisons and based on the estimated power consumption; and command activation and deactivation of the plurality of compressors to achieve the selected optimum operating mode. The optimum operating mode may be selected after the normal system logic achieves a steady state and may be selected from a group having the estimated system capacity within the error tolerance of the target capacity demand and a lowest associated power consumption value. 1. A system comprising:a plurality of compressors linked in parallel by a common discharge line and a common suction line;an evaporator;a condenser; anda system controller that determines a saturated evaporator temperature of the evaporator, a saturated condensing temperature of the condenser, a target capacity demand for the plurality of compressors, and an estimated system capacity and an estimated power consumption for each operating configuration of the plurality of compressors based on the saturated evaporator temperature and the saturated condensing temperature;wherein the system controller compares the estimated system capacity for each operating configuration with the target capacity demand and an error tolerance value and selects an optimum operating mode of the plurality of compressors based on the comparisons and the estimated power consumption for each operating configuration, the optimum operating mode being selected from a group of operating configurations having the ...

VARIABLE-CAPACITY CONTROL STRUCTURE, COMPRESSOR AND VARIABLE-CAPACITY CONTROL METHOD THEREOF

Disclosed are a variable-capacity control structure, a compressor and a variable-capacity control method thereof. The variable-capacity control structure includes: a variable-capacity assembly and a sliding vane restraint unit; the variable-capacity assembly is provided outside a housing of a compressor to which the variable-capacity control structure is attached, and is configured to act in a setting order; the sliding vane restraint unit is provided inside a pump body of the compressor, and is configured to cause a variable-capacity cylinder assembly in the compressor to be in a working state or an idling state under controlling the variable-capacity assembly to act in the setting order. By the solution of the present disclosure, advantages that vibration is reduced, compressor is not easy to shut down and pipeline is not easy to break are implemented. 1. A variable-capacity control structure , comprising: a variable-capacity assembly and a sliding vane restraint unit; whereinthe variable-capacity assembly is provided outside a housing of a compressor to which the variable-capacity control structure is attached, and is configured to act in a setting order;the sliding vane restraint unit is provided inside a pump body of the compressor, and is configured to cause a variable-capacity cylinder assembly in the compressor to be in a working state or an idling state under controlling the variable-capacity assembly to act in the setting order.2. The structure according to claim 1 , wherein claim 1 , the variable-capacity assembly comprises: a check valve;the check valve is provided in a pipeline between a variable-capacity cylinder intake port of a variable-capacity cylinder in the variable-capacity cylinder assembly and a second dispenser outlet of a dispenser in the compressor, and is configured to be in an on state when a refrigerant flows from the second dispenser outlet to the variable-capacity cylinder intake port, or be in a cut-off state when the refrigerant ...

INTERMEDIATE DISCHARGE PORT FOR A COMPRESSOR

An intermediate discharge port in a scroll compressor and a method for controlling part-load efficiency of a scroll compressor are disclosed. The compressor includes a compressor housing; a non-orbiting scroll member and an orbiting scroll member forming a compression chamber; a discharge port for receiving a compressed fluid; and an intermediate discharge port fluidly connected between the compression chamber and the discharge port, the intermediate discharge port including a sealing member, fluid flow being prevented between the compression chamber and the discharge port through the intermediate discharge port when in a flow-blocked state, and fluid flow being enabled between the compression chamber and the discharge port through the intermediate discharge port when in a flow-permitted state. 1. A compressor , comprising:a compressor housing;a non-orbiting scroll member and an orbiting scroll member forming a compression chamber;a discharge port for receiving a compressed fluid; andan intermediate discharge port fluidly connected between the compression chamber and the discharge port, the intermediate discharge port including a sealing member, fluid flow being prevented between the compression chamber and the discharge port through the intermediate discharge port when in a flow-blocked state, and fluid flow being enabled between the compression chamber and the discharge port through the intermediate discharge port when in a flow-permitted state.2. The compressor according to claim 1 , wherein the intermediate discharge port is disposed at a location of the compression chamber at which a fluid being compressed is partially compressed.3. The compressor according to claim 1 , wherein the compressor includes a plurality of intermediate discharge ports.4. The compressor according to claim 1 , wherein the intermediate discharge port includes a biasing mechanism for maintaining the sealing member in the flow-blocked state.5. The compressor according to claim 1 , wherein ...

SPIRAL VALVE ACTUATOR FOR AIR COMPRESSOR

A worm drive actuator for a spiral valve that opens and closes bypass ports on a rotary screw air compressor is provided. 1. An air compressor comprising:a compression chamber having an inlet and an outlet, the compression chamber defined by two radially intersecting axial bores, wherein each said bore contains an air compression screw;at least one bypass port in said compression chamber, wherein said at least one bypass port when open is in fluid communication with a spiral valve chamber that contains a spiral valve, wherein rotation of the spiral valve opens or closes the at least one bypass port; and a worm gear coupled to the spiral valve, and', 'a worm driven by an electric motor., 'a worm drive that actuates the spiral valve, the worm drive comprising2. The air compressor of comprising an effective compression volume of the compression chamber produced when at least one bypass port is open which is smaller than a closed compression volume produced when at least one bypass port is closed.3. The air compressor of wherein the at least one bypass port comprises multiple bypass ports claim 1 , with a first port located closer to the compression chamber outlet than a second port. 1. Technical FieldThe present invention relates to an actuator for a spiral valve that controls the opening and closing of a bypass port on a twin screw air compressor.2. BackgroundTwin screw air compressors are known in the art. Examples of configurations for twin screw air compressors are shown in U.S. Pat. No. 7,285,882 and US Publication No. 2007/0241627. As depicted therein, inside a compressor housing, a motor (typically a permanent magnet rotor/stator motor) is used to drive one of the two compression screws, which in turn drives the other screw. Air is taken in through an inlet, compressed between the screws as they turn, and output through an outlet which is in the opposite side of the screws, in the axial direction, as the air inlet.In one embodiment, an air compressor comprises: ...

CAPACITY CONTROL FOR CHILLERS HAVING SCREW COMPRESSORS

A compressor system includes a screw compressor () and a controller (). The screw compressor includes a slide valve () selectively actuatable between a first position and a second position to facilitate modulating a capacity of the screw compressor between fully-loaded and fully-unloaded. The controller is communicably coupled to the slide valve. The controller is configured to receive a chilled fluid temperature setpoint for a fluid in heat transfer communication with a refrigerant of the refrigeration circuit; receive temperature data indicative of a chilled fluid temperature of the fluid; determine a difference between the chilled fluid temperature and the chilled fluid temperature setpoint; and provide one of a load command and an unload command to the slide valve based the difference between the chilled fluid temperature and the chilled fluid temperature setpoint. According to an example embodiment, the controller () does not receive feedback from the screw compressor () regarding a position of the slide valve (). 1. A compressor system for a refrigeration circuit , comprising:a screw compressor including a slide valve selectively actuatable between a first position and a second position to facilitate modulating a capacity of the screw compressor between fully-loaded and fully-unloaded; and receive a chilled fluid temperature setpoint for a fluid in heat transfer communication with a refrigerant of the refrigeration circuit;', 'receive temperature data indicative of a billed fluid temperature of the fluid;', 'determine a difference between the chilled fluid temperature and the chilled fluid temperature setpoint; and', 'provide one of a load command and an unload command to the slide valve based the difference between the chilled fluid temperature and the chilled fluid temperature setpoint., 'a controller communicably coupled to the slide valve, the controller configured to2. The compressor system of claim 1 , wherein the controller is further configured to: ...

SCROLL COMPRESSOR

A scroll compressor according to the present invention includes a casing, an orbiting member provided within the casing and performing an orbiting motion, a non-orbiting member forming a compression chamber together with the orbiting member, the compression chamber having a suction chamber, an intermediate pressure chamber and a discharge chamber, a communication passage communicating inside and outside of the compression chamber with each other, an opening/closing valve assembly provided outside the non-orbiting member within the casing and opening and closing the communication passage, and a switching valve assembly provided within the casing and operating the opening/closing valve assembly, whereby a facilitated fabrication, improved valve responsiveness and a relaxed restriction for a specification of a valve can be achieved, and also an over-compression can be prevented by an installation of a check valve, and an assembling efficiency can be improved by installing two valve assemblies outside the non-orbiting member. 1. A scroll compressor , comprising:a casing;an orbiting member provided within the casing, and the orbiting member to perform an orbiting motion;a non-orbiting member, wherein the orbiting member and the non-orbiting member to form a compression chamber, the compression chamber having a suction chamber, an intermediate pressure chamber and a discharge chamber;a communication passage configured to communicate inside and outside of the compression chamber;an opening/closing valve assembly configured to open and close the communication passage, the opening/closing valve assembly provided outside the non-orbiting member and within the casing; and,a switching valve assembly configured to control the opening/closing valve assembly, the switching valve assembly being provided within the casing,wherein the non-orbiting member is provided with a connection passage, and the opening/closing valve assembly and the switching valve assembly are coupled to each ...

Variable Volume Ratio Compressor

A compressor may include a shell, first and second scroll members, a partition plate and a bypass valve member. The shell defines a discharge-pressure region and a suction-pressure region. The first scroll member is disposed within the shell and may include a first end plate having a discharge passage, and first and second bypass passages extending through the first end plate. The partition plate is disposed within the shell and separates the discharge-pressure region from the suction-pressure region and includes an opening in communication with the discharge-pressure region. The bypass valve member is movable between a first position restricting fluid flow through at least one of the first and second bypass passages and the opening and a second position in allowing fluid flow through the at least one of the first and second bypass passages and the opening. 1. A compressor comprising:a shell defining a discharge-pressure region and a suction-pressure region;a first scroll member disposed within the shell and including a first end plate and a first spiral wrap extending from a first side of the first end plate, the first end plate including a discharge passage, a first bypass passage and a second bypass passage extending through the first side and a second side of the first end plate;a second scroll member including a second spiral wrap cooperating with the first spiral wrap to define first and second fluid pockets therebetween, the first and second fluid pockets in communication with the first and second bypass passages, respectively;a partition plate disposed within the shell and separating the discharge-pressure region from the suction-pressure region, the partition plate including a first opening in communication with the discharge-pressure region;a bypass valve retainer attached to the partition plate and including a second opening in communication with the first opening, the discharge passage and the discharge-pressure region; anda bypass valve member disposed ...

Eccentric screw pump

The invention relates to an eccentric screw pump comprising at least one stator ( 1 ) made from an elastic material and a rotor ( 2 ) that is rotatable in the stator ( 1 ), wherein at least some regions of the stator ( 1 ) are surrounded by a stator casing ( 3 ), and the stator casing ( 3 ), as a casing split along its length, consists of at least two casing segments ( 19 ) and forms a stator clamping device by means of which the stator can be clamped against the rotor ( 2 ) in the radial direction, wherein the stator clamping device has one or more movable adjusting elements which work on the casing segments ( 19 ) to adjust and clamp the stator. Said pump is characterised in that the stator clamping device comprises one or more actuators which are connected to the adjusting elements or are equipped with adjusting elements for an automated advancement of the stator.

COMPRESSOR VALVE SYSTEM AND ASSEMBLY

A compressor may include first and second scroll members having first and second scroll wraps, respectively. The scroll members define a suction inlet, a discharge outlet, and fluid pockets moving therebetween. The second scroll member may include a port, and a passage. The port may be in fluid communication with at least one of the pockets. The passage may extend through a portion of the second end plate and may be in fluid communication with the port. A valve assembly may be disposed in the passage and may include a valve member displaceable between open and closed positions. A recompression volume may be disposed between the valve member and the at least one of the pockets. The recompression volume may be less than or equal to approximately one percent of a volume of one of the pockets at a suction seal-off position.

COMPRESSOR TEMPERATURE CONTROL SYSTEMS AND METHODS

A system for controlling capacity of a compressor comprises a minimum determination module () selectively increasing a minimum capacity of a compressor when a temperature of the compressor is greater than a first predetermined temperature; and a control module () increasing an actual capacity of the compressor in response to an increase in the minimum capacity. A method for controlling capacity of a compressor is also disclosed. The system and method modulate the capacity of the compressor according to the different temperatures. 1. A compressor capacity control system comprising:a minimum determination module that selectively increases a minimum capacity of a compressor when a temperature of the compressor is greater than a first predetermined temperature; anda control module that increases an actual capacity of the compressor in response to an increase in the minimum capacity.2. The compressor capacity control system of further comprising a capacity command module that sets a capacity command to a greater one of the minimum capacity and a target capacity of the compressor claim 1 ,wherein the control module controls the actual capacity of the compressor based on the capacity command.3. The compressor capacity control system of wherein the minimum determination module sets the minimum capacity to a predetermined maximum capacity of the compressor when the temperature of the compressor is greater than a second predetermined temperature claim 2 ,wherein the second predetermined temperature is greater than the first predetermined temperature.4. The compressor capacity control system of wherein the minimum determination module sets the minimum capacity to a predetermined minimum capacity of the compressor when the temperature of the compressor is less than the first predetermined temperature.5. The compressor capacity control system of further comprising a proportional claim 2 , integral claim 2 , derivative (PID) module that determines an adjustment value based on a ...

SCROLL COMPRESSOR WITH PARTIAL LOAD CAPACITY

A scroll compressor lubrication system and a scroll compressor are disclosed. The scroll compressor includes a capacity modulator, a lubricant opening, and a gas diverting passage. The capacity modulator is in fluid communication with compression pockets for selectively unloading gas from the pockets. The lubricant opening is in fluid communication with at least one bearing portion of the scroll compressor. Lubricant from the at least one bearing portion in the scroll compressor flows through the lubricant opening. The gas diverting passage includes an inlet and an outlet. The inlet of the gas diverting passage is in fluid communication with the capacity modulator, and the gas diverting passage extends below the lubricant opening such that gas from the outlet of the gas diverting passage can flow through a travel path of the lubricant that flows through the lubricant opening and entrains at least part of the lubricant to at least one bearing portion for lubrication. 1. A scroll compressor , comprising:a shell adapted to contain a lubricant;a scroll set in the shell, the scroll set including an orbiting scroll and a non-orbiting scroll, wherein pockets being defined between the orbiting scroll and the non-orbiting scroll for compressing gas;a capacity modulator in fluid communication with the pockets for selectively unloading gas from the pockets;a lubricant opening in fluid communication with at least one bearing portion of the scroll compressor, lubricant from the at least one bearing portion of the scroll compressor flows through the lubricant opening; anda gas diverting passage in the shell, the gas diverting passage including an inlet and an outlet, the inlet of the gas diverting passage being in fluid communication with the capacity modulator, and the gas diverting passage extending below the lubricant opening such that gas from the outlet of the gas diverting passage can flow through a travel path of the lubricant that flows through the lubricant opening and ...

A multiple vane roto-dynamic variable displacement kinetic system

A multiple vane kinetic system that produces variation in enclosed volumes between pairs of radial vane sets independent of each other and coaxial with a central axis within a annular casing that encapsulates the vane sets and operates in a sequence where the vane sets function as rotating links of the mechanism for a pellicular period, which is preceeded and succeeded by another period where either vane sets successively alternate between being a fixed link and a rotating link of the mechanism and during the former period the volumes between vanes remain constant as long as the vane sets have equal angular velocities, otherwise varies at rates proportional to differing angular velocities. The two time periods are controlled by timing devices actuating the vane sets to be coupled and decoupled with a power shaft and the variation in length of the two time periods makes roto-dynamic variable displacement machine.

COMPRESSOR

A screw compressor () with at least one screw rotor () which is rotatably arranged about a rotational axis arranged in the axial direction. The at least one screw rotor () is arranged in a compression area () which is fluid-tight against the surrounding area at least in some sections and opens into a high-pressure volume (). The compressor () further has a Vi slide () for influencing an inner volume ratio of the compressor, the Vi slide () at least partly forming a section of the fluid-tight border of the compression area () and being arranged such that the position of the slide can be adjusted in the axial direction. The Vi slide () can be continuously displaced, and the compressor () has a device () for detecting the position of the slide. 1. A screw compressor having at least one screw rotor which is arranged such that it can be rotated about an axis of rotation arranged in the axial direction , wherein the at least one screw rotor is arranged in a compression space , which is designed to be at least in sections fluid-tight in the direction of the surroundings and opens out into a high-pressure volume , wherein the compressor also has a Vi slide for influencing an internal volume ratio of the compressor , wherein the Vi slide forms , at least in part , a portion of the fluid-tight boundary of the compression space and is arranged such that it can be displaced in position in the axial direction ,whereinthe Vi slide can be displaced in a stepless manner and the compressor has a device for sensing the slide position.2. The compressor as claimed in claim 1 , whereinthe Vi slide has a slide-position sensor or a position transducer.3. The compressor as claimed in claim 1 , whereinthe Vi slide has an axially arranged recess, in particular groove, of which the depth increases in the axial direction.4. The compressor as claimed in claim 3 , whereinthe compressor has a rod with two ends, wherein one end of the rod engages in the recess, and wherein the rod is in operative ...

COMPRESSOR COMPRISING A VARIABLE VOLUME INDEX VALVE

A compressor is provided including a housing having a suction inlet and a discharge outlet. A compression mechanism within the housing is configured to receive a vapor at the suction inlet and to provide a compressor vapor to the discharge outlet. A volume index valve is arranged near the discharge outlet. The volume index valve includes a piston positioned within a hollow chamber and configured to move between a closed position and an open position to provide a bypass flow path from an intermediate portion of the compression mechanism to the discharge outlet. The piston is configured to move within the chamber automatically in response to the operating pressure of the vapor within the compressor. 1. A compressor comprising:a housing including a suction inlet and a discharge outlet;a compression mechanism configured to receive a vapor at the suction inlet and to provide compressed vapor to the discharge outlet;a volume index valve arranged near the discharge outlet, the volume index valve including a piston positioned within a hollow chamber and configured to move between a closed position and an open position to provide a bypass flow path from an intermediate portion of the compression mechanism to the discharge outlet, the piston being configured to move within the chamber automatically in response to the operating pressures of the vapor within the compressor.2. The compressor according to claim 1 , wherein the hollow chamber includes an integrally formed first portion having a first cross-sectional area and second portion having a second cross-sectional area larger than the first cross-sectional area claim 1 , the first portion being positioned adjacent the compression mechanism and the second portion being adjacent the housing.3. The compressor according to claim 2 , wherein a cover mounted to the housing overlaps an end of the second portion of the hollow chamber.4. The compressor according to claim 3 , wherein the piston includes a first section arranged ...

COMPRESSOR HAVING CAPACITY MODULATION SYSTEM

A compressor may include first and second scrolls, a seal assembly and a valve ring. The first scroll may include a first end plate having a discharge passage, a modulation port, and a biasing passage. The modulation port may be in communication with a first pocket formed between spiral wraps of the first and second scrolls. The biasing passage may be in communication with a second pocket formed between spiral wraps of the first and second scrolls. The modulation valve ring is axially displaceable relative to the seal assembly and the first scroll between first and second positions. The valve ring may abut an end plate of the first scroll and close the modulation port when in the first position. The valve ring may abut an axially-facing surface of the seal assembly and is spaced apart from the end plate to open the modulation port when in the second position. 1. A compressor comprising:a shell assembly defining a suction-pressure region and a discharge-pressure region, the shell assembly including a partition separating the suction-pressure region from the discharge-pressure region;a first scroll member disposed within the shell assembly and including a first end plate having a discharge passage, a modulation port, a biasing passage, and a first spiral wrap extending from the first end plate;a second scroll member disposed within the shell assembly and including a second end plate having a second spiral wrap extending therefrom, the first and second spiral wraps meshingly engaged and forming a series of pockets during orbital displacement of the second scroll member relative to the first scroll member, the modulation port in communication with a first one of the pockets, the biasing passage in communication with a second one of the pockets;a floating seal assembly engaged with the partition and the first scroll member and isolating the discharge-pressure region from the suction-pressure region;a modulation valve ring located axially between the floating seal ...

Screw Machine

A screw machine having a rotor housing portion and an outflow housing portion, screw rotors mounted in the rotor housing portion that form a rotor pair, and a control slide that is likewise mounted in the rotor housing portion, which delimits a working space of the rotor housing portion and which can be shifted parallel to the rotor axes of the screw rotors to change a size of the effective working space. The control slide, when shifted out of the rotor housing portion into the outflow housing portion, is guided by a positively joined guide of the outflow housing portion. 1. A screw machine , comprisinga machine housing having a rotor housing portion and an outflow housing portion;screw rotors mounted in the rotor housing portion that form a rotor pair;a control slide mounted in the rotor housing portion that delimits a compression space of the rotor housing portion and configured to be shifted parallel to a rotor axis of the screw rotors to changing a size of an effective working space such that the effective working space is made smaller as the control slide is shifted out of the rotor housing portion into the outflow housing portion; anda positively joined guide that is and configured to guide the control slide configured to guide the control slide as the control slide is shifted out of the rotor housing portion into the outflow housing portion.2. The screw machine according to claim 1 , wherein the positively joined guide of the outflow housing portion comprises a guide rod that supports and guides the control slide in a positively joined manner.3. The screw machine according to claim 2 , wherein the guide rod extends parallel to the rotor axis of the screw rotors.4. The screw machine according to claim 2 , wherein the guide rod is affixed to the outflow housing portion and has an end facing away from one or more of the rotor housing portion and the control slide.5. The screw machine according to claim 2 , wherein the guide rod is configured to support and guide ...

VARIABLE VOLUME RATIO SCROLL COMPRESSOR

A compressor may include a scroll member, a hub, a discharge valve and a bypass valve. An end plate of the scroll member includes a recess, a discharge passage in communication with the recess, and a bypass passage in communication with the recess and disposed radially outward relative to the discharge passage. The hub may be received in the recess and may include a central opening in communication with the discharge passage and the bypass passage. The discharge valve may be disposed between the hub and the end plate and may control fluid flow through the discharge passage. The bypass valve may be disposed between the hub and the end plate and may be movable between a first position restricting fluid flow through the bypass passage and a second position allowing fluid to flow through the bypass passage, around the discharge valve and through the central opening. 1. A compressor comprising:a scroll member including an end plate and a wrap extending from the end plate, the end plate including a recess, a discharge passage in communication with the recess, and a bypass passage in communication with the recess and disposed radially outward relative to the discharge passage;a hub received in the recess and including a central opening in communication with the discharge passage and the bypass passage;a discharge valve disposed between the hub and the end plate and controlling fluid flow through the discharge passage; anda bypass valve disposed between the hub and the end plate and movable between a first position restricting fluid flow through the bypass passage and a second position allowing fluid to flow through the bypass passage, around the discharge valve and through the central opening.2. The compressor of claim 1 , wherein the bypass valve includes a valve retainer engaging a reed valve member and defining the second position of the bypass valve.3. The compressor of claim 2 , further comprising an annular spring disposed between the hub and the valve retainer and ...

A DEVICE FOR A MACHINE OF DISPLACEMENT TYPE, A CONTROLLING GEAR ARRANGEMENT FOR THE DEVICE, AND USAGE OF THE CONTROLLING GEAR ARRANGEMENT

A rotary piston machine of displacement type, comprising two mutually continuously movable parts () having co-axial rotation axes () and mutually variable movement, wherein the first part () internally has at least two radially inwardly directed wings () with mutual angular distance along the curved inside wall () of the part between the wings (), wherein the second part () has a hub () which has at least two radially outwardly directed wings () with mutual angular distance, wherein a portion of the hub () between the wings of the second part is in slidable or adjacent contact with a curved, free end portion () of the wings on the first part (), wherein a curved, free end portion () of each wing on the other part () is in slidable or adjacent contact with the curved inside wall () on the first part () which is located between respective ones of two neighbouring wings () on the first part (), wherein the wings () of the second part () being movable between respective neighbouring wings () on the first part, so that chambers which are created between co-operative pairs of wings on the first part and the second part successively increase and decrease, and decrease and increase, respectively, in volume during the course of a rotation cycle of the created chambers, and wherein movements of said mutually movable parts are caused by a controlling gear arrangement () which operationally co-operates with a rotatable main drive shaft () of the machine. 1. A device for a machine of displacement type , comprising:a) a non-rotatable housing which surrounds two mutually movable parts,b) a first part which with its outer circumference is controllably rotationally movable along inside wall of the housing,c) a second part which is controllably movable relative to inner circumferential face of the first part, andd) at least one inlet aperture and at least one outlet aperture associated with a wall of the housing,wherein:e) that the two mutually movable parts have co-axial axes of ...

SCROLL COMPRESSOR

A scroll compressor according to the present invention includes a casing, an orbiting member provided within the casing and performing an orbiting motion, a non-orbiting member forming a compression chamber together with the orbiting member, the compression chamber having a suction chamber, an intermediate pressure chamber and a discharge chamber, a communication passage configured to bypass a refrigerant of the compression chamber into the casing, an opening/closing valve assembly configured to open and close the communication passage, and a switching valve assembly configured to operate the opening/closing valve assembly, the switching valve assembly being provided outside the casing and connected to the opening/closing valve assembly, whereby an installation of the bypass hole can result in prevention of over-compression and an installation of a control valve for varying a capacity outside the casing can result in reduction of costs for the control valve. 1. A scroll compressor , comprising:a casing;an orbiting member provided within the casing, and the orbiting member to perform an orbiting motion;a non-orbiting member, wherein the orbiting member and the non-orbiting member to form a compression chamber, the compression chamber having a suction chamber, an intermediate pressure chamber and a discharge chamber;a communication passage configured to allow a refrigerant of the compression chamber to flow;an opening/closing valve assembly configured to open and close the communication passage; anda switching valve assembly configured to control the opening/closing valve assembly, the switching valve assembly to be coupled to the opening/closing valve assembly, and the switching valve assembly to be provided outside the casing.2. The scroll compressor of claim 1 , wherein the non-orbiting member includes a bypass hole to allow a refrigerant of the intermediate pressure chamber to at least partially pass claim 1 , and wherein a check valve is provided at the bypass ...

SCROLL COMPRESSOR

A scroll compressor according to the present invention includes a casing, an orbiting member provided within the casing and performing an orbiting motion, a non-orbiting member forming a compression chamber together with the orbiting member, the compression chamber having a suction chamber, an intermediate pressure chamber and a discharge chamber, a communication passage communicating inside and outside of the compression chamber with each other, an opening/closing valve assembly provided outside the non-orbiting member within the casing and opening and closing the communication passage, and a switching valve assembly provided within the casing and operating the opening/closing valve assembly, whereby a facilitated fabrication, improved valve responsiveness and a relaxed restriction for a specification of a valve can be achieved, and also an over-compression can be prevented by an installation of a check valve, and an assembling efficiency can be improved by installing two valve assemblies outside the non-orbiting member. 1. A scroll compressor , comprising:a casing;an orbiting member provided within the casing, and the orbiting member to perform an orbiting motion;a non-orbiting member, wherein the orbiting member and the non-orbiting member to form a compression chamber, the compression chamber having a suction chamber, an intermediate pressure chamber and a discharge chamber;a communication passage configured to communicate inside and outside of the compression chamber;an opening/closing valve assembly configured to open and close the communication passage, the opening/closing valve assembly provided outside the non-orbiting member and within the casing; anda switching valve assembly configured to control the opening/closing valve assembly, the switching valve assembly being provided within the casing.2. The scroll compressor of claim 1 , wherein the opening/closing valve assembly includes a valve to operate based on a pressure difference claim 1 , and the ...

Screw compressor

A screw compressor includes a casing, a motor provided in the casing, a screw rotor inserted into a cylinder in the casing, a bearing holder, a drive shaft, a first bearing, and a second bearing. The cylinder is formed on a lateral side of the motor. The bearing holder is disposed on an opposite side of the screw rotor from the motor and adjacent to the screw rotor. The drive shaft is connected to the motor and the screw rotor. The first bearing is disposed adjacent to the screw rotor. The second bearing is disposed adjacent to the motor in an axial direction of the drive shaft. At least a portion of the first bearing is disposed inside the screw rotor.

Pump Assembly and Method for Evacuating a Vapor-Filled Chamber

The invention relates to an assembly comprising a vacuum pump and a chamber, wherein a suction tract extends between the chamber and the vacuum pump. The vacuum pump is a liquid ring machine. According to the invention, a liquid outlet is arranged in the suction tract in order to add liquid to gas sucked in from the chamber. The invention further relates to a method for evacuating a chamber filled with vapor. According to the invention, the vapor is condensed by introducing additional liquid into the suction tract, thus by co-condensation. By supplying liquid selectively only when liquid is required for the condensation of the vapor, water is saved. 1161517151616181715. An assembly produced from a vacuum pump () and a chamber () , wherein an intake tract () extends between the chamber () and the vacuum pump () and wherein the vacuum pump () is a liquid ring machine , characterized in that a liquid outlet () is arranged in the intake tract () in order to mix gas sucked out of the chamber () with liquid.216. The assembly of claim 1 , wherein the vacuum pump () is designed for the purpose of generating a vacuum of less than 150 mbar claim 1 , preferably less than 100 mbar claim 1 , further preferably less than 70 mbar.318. The assembly of claim 1 , wherein the liquid outlet () includes a spray opening.422211616. The assembly of claim 1 , wherein a separator () connects to the output side () of the vacuum pump () in order to collect liquid volumes conveyed by the vacuum pump ().524211618. The assembly of claim 1 , wherein a return line () claim 1 , which extends from the outlet side () of the vacuum pump () as far as the liquid outlet () claim 1 , is provided for the liquid.616252524. The assembly of claim 5 , wherein the vacuum pump () includes an inlet () for supplying an operating liquid and in that the inlet () is connected to the return line ().7201825. The assembly of claim 1 , comprising a fresh water connection () for supplying a liquid to the liquid outlet () ...

Scroll compressor

A scroll compressor is provided that may include a casing including a rotational shaft, a cover fixed inside of the casing to partition the inside of the casing into a suction space and a discharge space, a first scroll that is revolved by rotational of the rotational shaft, a second scroll disposed on or at a side of the first scroll to define a plurality of compression chambers together with the first scroll, the second scroll having an intermediate pressure discharge hole that communicates with a compression chamber having an intermediate pressure of the plurality of compression chambers, a back pressure plate coupled to the second scroll, the back pressure plate having an intermediate pressure suction hole that communicates with the intermediate pressure discharge hole, and a floating plate movably disposed on or at a side of the back pressure plate to define the back pressure chamber together with the back pressure plate. The discharge space may have a volume greater by a set ratio or more than a volume of the back pressure chamber.

CONTROL VALVE FOR VARIABLE DISPLACEMENT COMPRESSOR

A control valve includes: a first valve to control a flow rate of refrigerant flowing from a discharge chamber to a control chamber of a compressor; a second valve to control a flow rate of the refrigerant flowing from the control chamber to a suction chamber; a solenoid to generate a drive force in a first valve closing direction and a second valve opening direction; a biasing member to generate a biasing force in an first valve opening direction and a second valve closing direction; and a pressure sensing part to sense a pressure in the suction chamber or the control chamber, and generate a counterforce against the drive force. A state in which both of the first and second valves are open is present during an increase in the current supplied to the solenoid from zero to an upper limit current value, and an increase rate of an opening degree of the first valve is increased during a decrease in the current supplied to the solenoid, a predetermined lower limit current value being an inflection point of the increase. 1. A control valve applicable to a variable displacement compressor having a suction chamber , a discharge chamber , and a control chamber , and having a discharge capacity varied by regulating a pressure in the control chamber , the control valve comprising:a first valve provided between the discharge chamber and the control chamber, to control a flow rate of refrigerant flowing from the discharge chamber to the control chamber;a second valve provided between the control chamber and the suction chamber, to control a flow rate of the refrigerant flowing from the control chamber to the suction chamber;a solenoid to generate a drive force in a closing direction of the first valve and an opening direction of the second valve depending on an amount of supplied current;a biasing member to generate a biasing force in an opening direction of the first valve and a closing direction of the second valve; anda pressure sensing part to sense a pressure in the suction ...

Compressor Having Capacity Modulation Assembly

A compressor may include first and second scrolls, and an axial biasing chamber. Spiral wraps of the scrolls mesh with each other and form compression pockets including a suction-pressure compression pocket, a discharge-pressure compression pocket, and intermediate-pressure compression pockets. The axial biasing chamber may be disposed axially between the second end plate and a component. Working fluid disposed within the axial biasing chamber may axially bias the second scroll toward the first scroll. The second end plate includes outer and inner ports. The outer port is disposed radially outward relative to the inner port. The outer port may be open to a first one of the intermediate-pressure compression pockets and in selective fluid communication with the axial biasing chamber. The inner port may be open to a second one of the intermediate-pressure compression pockets and in selective fluid communication with the axial biasing chamber.

Rotary Fluid Transfer Apparatus and Associated Methods

A fluid transfer device comprising an inner member with a central axis and an outer surface; an outer member coaxially arranged with the inner member, and a space defined radially between the inner and outer members; a first and second axial members; at least one fluid chamber defined in the space having an inlet and an outlet; the first axial member is rotationally fixed relative to the outer member and the second axial member is rotatable about the central axis to vary the volume of the fluid chamber. The relative rotational position of the first and second axial members is defined by a cam arrangement which comprises first and second axial member walls; the first axial member wall forms a first cam track wall which provides a first cam track waveform, the second axial member wall which comprises a second cam track wall; each cam track wall is circumferentially continuous. 2. A motor as claimed in wherein the volume of the at least one fluid chamber is variable in response to a fluid pressure.3. A motor as claimed in wherein the at least one fluid chamber volume is variable in response to a fluid pressure differential.4. A motor as claimed in wherein the fluid pressure differential is a differential fluid pressure across the inlet and the outlet.5. A motor as claimed in wherein the motor is an engine.6. A motor as claimed in wherein the motor is a combustion engine.7. A motor as claimed in wherein at least a portion of the at least one fluid chamber comprises a combustion chamber.8. A motor as claimed in wherein the at least one fluid chamber volume varies in response to a change in internal chamber pressure.9. A motor as claimed in wherein the at least one outlet may comprise an exhaust outlet.10. A motor as claimed in wherein the volume of the at least one fluid chamber corresponds to an axial position of the first and/or second axial members.11. A motor as claimed in wherein the axial position comprises an axial separation.12. A motor as claimed in wherein the ...

SCROLL COMPRESSOR

A scroll compressor includes a casing accommodating a rotary shaft and a driving unit, a first scroll making an orbiting movement by the rotary shaft, a second scroll engaged with the first scroll to form a compression chamber and having a bypass hole bypassing a refrigerant sucked into the compression chamber to an internal space of the casing, and a back-pressure chamber assembly pressing the second scroll toward the first scroll, wherein the back-pressure chamber assembly includes: a back-pressure space, a first valve unit allowing the bypass hole and the internal space of the casing to selectively communicate with each other, and a second valve unit opened and closed to selectively supply the refrigerant of the back-pressure space to the first valve unit to operate the first valve unit, and positioned to be fixed to the casing. 1. A scroll compressor comprising:a casing that defines an internal space;a rotary shaft located in the casing;a driving unit configured to rotate the rotary shaft;a first scroll located in the casing and connected to the rotary shaft, the first scroll being configured to rotate based on rotation of the rotary shaft;a second scroll that is engaged with the first scroll, that defines a compression chamber based on engagement with the first scroll, and that defines a bypass hole configured to allow flow of refrigerant from the compression chamber to the internal space of the casing; anda back-pressure chamber assembly configured to provide pressure to the second scroll toward the first scroll, the back-pressure chamber assembly defining a back-pressure space configured to receive refrigerant and to communicate with the compression chamber, a first valve unit that defines a valve space and that selectively enables communication between the bypass hole and the internal space of the casing based on operation modes, the first valve unit comprising a bypass valve located in the valve space, and', 'a second valve unit that is coupled to the ...

SCROLL COMPRESSOR

A scroll compressor according to the present invention includes a casing, an orbiting member provided within the casing and performing an orbiting motion, a non-orbiting member forming a compression chamber together with the orbiting member, the compression chamber having a suction chamber, an intermediate pressure chamber and a discharge chamber, a communication passage configured to bypass a refrigerant of the compression chamber into the casing, an opening/closing valve assembly configured to open and close the communication passage, and a switching valve assembly configured to operate the opening/closing valve assembly, the switching valve assembly being provided outside the casing and connected to the opening/closing valve assembly, whereby an installation of the bypass hole can result in prevention of over-compression and an installation of a control valve for varying a capacity outside the casing can result in reduction of costs for the control valve. 1. A scroll compressor , comprising:a casing having an inner space;an orbiting member provided in an inner space of the casing, and the orbiting member to perform an orbiting motion;a non-orbiting member, wherein the orbiting member and the non-orbiting member to form a compression chamber, the compression chamber having a suction chamber, an intermediate pressure chamber and a discharge chamber;a communication passage configured to allow a refrigerant of the compression chamber to flow;an opening/closing valve assembly configured to open and close the communication passage; anda switching valve assembly configured to control the opening/closing valve assembly, the switching valve assembly to be coupled to the opening/closing valve assembly, and the switching valve assembly to be provided outside the casing,wherein the non-orbiting member includes a plurality of bypass holes to allow a refrigerant of the intermediate pressure chamber to at least partially pass,wherein a portion of the opening/closing valve ...

Patent DE3143328C2

COMPRESSOR UNIT AND METHOD FOR OPERATING A COMPRESSOR UNIT

A compressor unit including a screw compressor having a compressor housing that has a screw rotor chamber arranged in the compressor housing, two screw rotors that are arranged in the screw rotor chamber and are mounted on the compressor housing to be rotatable about a respective screw rotor axis, and at least one control slider, which is arranged in a slider channel of the compressor housing, is adjacent to both screw rotors and is movable in a direction of displacement parallel to the screw rotor axes and takes a form such that it affects the final volume and/or the initial volume, wherein there is provided on the screw compressor a compressor operational control unit that takes a form such that it performs a compressor operating function that assists at least one operation of the compressor unit. 1. A compressor unit , comprising:a screw compressor having a compressor housing that has a screw rotor chamber arranged in the compressor housing;at least one screw rotor that is arranged in the screw rotor chamber, and is mounted on the compressor housing to be rotatable about a screw rotor axis and to receive a gaseous medium having an initial volume that is supplied by way of a low-pressure chamber arranged in the compressor housing, and to discharge the gaseous medium, compressed to a final volume, in the region of a high-pressure chamber arranged in the compressor housing; andat least one control slider arranged in a slider channel of the compressor housing, and which is adjacent to the screw rotor, the at least one control slider being movable in a direction of displacement parallel to the screw rotor axis and being configured such that the at least one control slider affects the final volume and/or the initial volume;wherein the screw compressor has a compressor operational control unit configured to perform a compressor operating function, which is an operation assisting function that assists at least one operation of the compressor unit.2. The compressor unit ...

Screw compressor (options)

FIELD: machine building.SUBSTANCE: group of inventions relates to a screw compressor. Said compressor includes a housing, two screw rotors (26, 28), at least one control valve (52, 54), which is movable in the direction of movement parallel to the axes of rotor (26, 28), position-detector device (152) for at least one control valve that has position display element (156, 158) associated with at least one control valve. At least one element (156, 158) interacts with detector element (154), which extends parallel to the direction of movement of at least one control valve (52, 54) and along which element (156, 158) is movable. Element (154) is interfaced with evaluation device (192), which records the corresponding position of element (156, 158) along element (154). Element (154) extends parallel to displacement direction (72) of at least one control valve (52, 54). Element (156, 158) is movable along element (154). Element (154) is mated to device (192), which registers the corresponding position of element (156, 158) along element (154). Element (154) is located in detector channel (216) passing inside the housing parallel to displacement direction (72) and closed by a cover.EFFECT: group of inventions is aimed at ensuring accurate registration of the position of the control valves.28 cl, 18 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 684 053 C2 (51) МПК F04C 18/16 (2006.01) F04C 28/12 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК F04C 18/16 (2018.05); F04C 28/12 (2018.05) (21)(22) Заявка: 2017116018, 05.10.2015 (24) Дата начала отсчета срока действия патента: Дата регистрации: (73) Патентообладатель(и): БИТЦЕР КЮЛЬМАШИНЕНБАУ ГМБХ (DE) 03.04.2019 (56) Список документов, цитированных в отчете о поиске: US 5257921 A, 02.11.1993. GB 08.10.2014 DE 102014114605.0; 28.09.2015 DE 102015116324.1 (43) Дата публикации заявки: 12.11.2018 Бюл. № 32 2331574 A, 26.05.1999. DE 3422573 A1, 19.12.1985. US 4610612 A, 09.09 ...

螺旋压缩机

本发明涉及一种螺旋压缩机，包括具有螺旋转子室(18)的压缩机壳体(12)、两个设置在螺旋转子室中并且在压缩机壳体上分别围绕螺旋转子轴线可旋转地支承的相互嵌接的螺旋转子(26、28)以及至少一个设置在压缩机壳体的滑块通道(56)中并且以滑块压缩壁面(62、64)邻接到两个螺旋转子(26、28)上的控制滑块(52、54)，所述控制滑块能沿平行于螺旋转子轴线的移动方向(72)运动，所述控制滑块刚性地与活塞杆(118)连接，所述活塞杆引导至用于使至少一个控制滑块运动的缸装置(112)，并且所述控制滑块借助能够沿移动方向(112)运动地容纳活塞杆(118)的引导插件(172)相对于压缩机壳体引导，其中，在引导插件(172)中所述活塞杆(112)借助于引导元件(242、276、278、292)横向于移动方向被弹性柔韧地引导。

Screw compressor with controlled discharge

A variable capacity screw compressor comprising a casing, housing two intersecting bores defining a working chamber in which a pair of intermeshing screws comprising helical lands and intervening grooves are mounted to rotate and to compress a working fluid as it is being passed axially through the working chamber from a low pressure inlet wall to a high pressure outlet wall, the inlet wall having an inlet passage in substantially axial alignment with the axes of the rotary screws for filling the ends of the grooves facing the axial inlet passage with working fluid. The capacity of the compressor to operate within a predetermined range of load variations from full load to no load conditions is regulated by a slide valve located on the high pressure side of the compressor and being axially displaceable in response to varying load conditions to expose a by-pass opening for venting partially compressed working fluid directly into the grooves of the compressor screws at a location between the by-pass opening and the axially aligned inlet passage to thereby interrupt admission of cold working fluid into the grooves from the inlet passage.

Compressor module and method of operation of compressor module

FIELD: machine building.SUBSTANCE: group of inventions relates to a compressor module. Module comprises screw compressor (10) with housing (12), in which chamber is located, at least one screw rotor located in chamber and installed in housing (12) with possibility of rotation around axis, which through the low-pressure chamber located in housing (12) receives the supplied gaseous medium with the initial volume and releases it with compression to the final volume into the high-pressure chamber area located in housing (12), as well as at least one distributing slide installed in slide channel of housing (12) and adjacent to rotor, which moves in parallel to axis direction and is configured to act on final volume and/or initial volume. Compressor 10 is provided with compressor operation control unit. Compressor (10) has housing (230) of control device, in which control unit is located. Housing (230) is located on housing (12). Control unit is equipped with communication unit for data exchange with external devices.EFFECT: group of inventions is aimed at providing the possibility of the control unit performing at least one operating function module of the compressor.40 cl, 17 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 729 967 C2 (51) МПК F04C 18/16 (2006.01) F04C 28/12 (2006.01) F04C 28/28 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК F04C 18/16 (2019.05); F04C 28/12 (2019.05); F04C 28/28 (2019.05) (21)(22) Заявка: 2018138286, 06.04.2016 (24) Дата начала отсчета срока действия патента: Дата регистрации: (73) Патентообладатель(и): БИТЦЕР КЮЛЬМАШИНЕНБАУ ГМБХ (DE) 13.08.2020 (43) Дата публикации заявки: 12.05.2020 Бюл. № 14 (45) Опубликовано: 13.08.2020 Бюл. № 23 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 06.11.2018 (56) Список документов, цитированных в отчете о поиске: US 4609329 A, 02.09.1986. WO 03/ 019010 A1, 06.05.2003. EP 1498611 A1, 19.01.2005. US 5257921 A, 02.11.1993. WO 9318307 ...

Scroll compressor

The present invention relates to a scroll compressor. The present invention can simplify the assembling process of the compressor by modularizing the valve and the valve spring in the housing and fastening the housing directly to the fixed scroll. In addition, a sealing groove communicating with the intermediate compression chamber is formed in the housing to form a buffer space between the high pressure portion and the low pressure portion, so that the refrigerant in the high pressure portion leaks to the low pressure portion during normal operation.

多叶片转子动力可变排量动力学系统

一种多叶片动力学系统，该系统产生在多对径向叶片组之间所包围的容积的变化并且按顺序运行，该叶片组彼此独立并且与在包封叶片组的环形外壳内的中心轴线同轴，在该顺序中，叶片组在特定周期内用作机构的旋转联杆，该特定周期在另一周期之前和之后，在另一周期中，任一叶片组在固定联杆和旋转联杆之间连续交替，并且在前一周期期间，只要叶片组具有相同角速度，叶片之间的容积就保持恒定，否则以与不同角速度成比例的速度变化。两个时间周期通过定时装置控制，定时装置致动叶片组与动力轴联接和脱开，并且两个时间周期的长度变化制造转子动力可变排量机器。

空気調和装置

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

Rotary compressor

본 발명은 두개의 압축용량을 갖는 로터리 압축를 개시한다. 이를 위하여 본 발명은 시계 및 반시계방향 둘 다로 회전가능하며, 소정 크기의 편심부를 갖는 구동축; 소정크기의 내부체적을 형성하는 실린더; 상기 실린더 내주면에 접하도록 상기 편심부의 외주면에 회전가능하게 설치되어, 상기 내주면을 따라 구름운동을 하며 상기 내주면과 함께 유체의 흡입 및 압축을 위한 유체 챔버를 형성하는 롤러; 상기 롤러와 계속적으로 접촉하도록 상기 실린더에 탄성적으로 설치되되는 베인; 그리고 상기 실린더 상하부에 각각 설치되어 각각 상기 구동축을 회전가능하게 지지하며, 상기 내부체적을 밀폐하는 상부 및 하부 베어링; 상기 유체챔버와 연통하는 토출포트들; 상기 유체챔버와 연통하며 서로 소정각도로 이격되는 흡입포트들; 상기 흡입포트들중 어느 하나를 상기 구동축의 회전방향에 따라 선택적으로 개방하는 밸브 어셈블리로 이루어져, 상기 구동축의 회전방향에 따라 상기 유체챔버내에 서로 다른 크기의 압축공간들이 형성되어 서로 다른 두개의 압축용량을 갖는 것을 특징으로 하는 로터리 압축기를 제공한다. The present invention discloses rotary compression with two compression capacities. To this end, the present invention can be rotated in both clockwise and counterclockwise, the drive shaft having an eccentric portion of a predetermined size; A cylinder forming an internal volume of a predetermined size; A roller rotatably installed on an outer circumferential surface of the eccentric portion so as to be in contact with the inner circumferential surface of the cylinder, for rolling along the inner circumferential surface and forming a fluid chamber together with the inner circumferential surface for suction and compression of the fluid; A vane elastically installed on the cylinder to continuously contact the roller; And upper and lower bearings respectively installed on upper and lower portions of the cylinder to rotatably support the driving shaft, and seal the internal volume. Discharge ports communicating with the fluid chamber; Suction ports communicating with the fluid chamber and spaced apart from each other by a predetermined angle; It consists of a valve assembly for selectively opening any one of the suction ports according to the rotational direction of the drive shaft, the compression spaces of different sizes are formed in the fluid chamber in accordance with the rotational direction of the drive shaft two different compression capacity It provides a rotary compressor characterized by having.

SCREW COMPRESSOR

РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2017 116 018 A (51) МПК F04C 18/16 (2006.01) F04C 28/12 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2017116018, 05.10.2015 (71) Заявитель(и): БИТЦЕР КЮЛЬМАШИНЕНБАУ ГМБХ (DE) Приоритет(ы): (30) Конвенционный приоритет: 08.10.2014 DE 102014114605.0; 28.09.2015 DE 102015116324.1 32 R U (43) Дата публикации заявки: 12.11.2018 Бюл. № (72) Автор(ы): ЛЁРХ Рони (DE), ФЕЛЛЕР Клаус (DE), МИКУЛИЦ Тихомир (DE) (85) Дата начала рассмотрения заявки PCT на национальной фазе: 10.05.2017 EP 2015/072934 (05.10.2015) (87) Публикация заявки PCT: A WO 2016/055412 (14.04.2016) Адрес для переписки: 105082, Москва, Спартаковский пер., 2, стр. 1, секция 1, этаж 3, ЕВРОМАРКПАТ R U (57) Формула изобретения 1. Винтовой компрессор (10), включающий в себя корпус (12) компрессора с расположенным в нем пространством (18) винтовых роторов, два расположенных в пространстве (18) винтовых роторов и установленных на корпусе (12) компрессора с возможностью вращения в каждом случае вокруг оси (22, 24) винтового ротора винтовых ротора (26, 28), которые их винтовыми контурами (32, 34) входят во взаимное зацепление и взаимодействуют в каждом случае с граничащими с ними и частично охватывающими их поверхностями (36, 38) уплотняющих стенок для принятия подводимой газообразной среды через расположенное в корпусе (12) компрессора пространство (42) низкого давления и для ее отдачи в области расположенного в корпусе (12) компрессора пространства (44) высокого давления, причем газообразная среда в образованных между винтовыми контурами (32, 34) и граничащими с ними поверхностями (36, 38) уплотняющих стенок уплотняющих камерах захватывается при пониженном давлении с всасываемым объемом и сжимается при высоком давлении до конечного объема, а также по меньшей мере один расположенный в золотниковом канале (56) корпуса (12) компрессора и граничащий с обоими винтовыми роторами (26, 28) поверхностями (62, 64) ...

Rotary Type Compressor Having Dual Capacity

본 발명은 이중용량 압축기에 관한 것으로, 구동축의 회전방향에 따라 상하로 배치된 2개의 압축부의 편심이 이루어지거나 편심이 해제되면서 냉력 가변이 이루질 수 있도록 한 것이다. The present invention relates to a dual displacement compressor, which is made so that the eccentricity of the two compression units arranged up and down according to the rotational direction of the drive shaft is made or the cooling force can be varied while the eccentric is released. 이를 위한 본 발명은, 소정 크기의 내부 체적이 형성되고, 작동유체가 각각 흡입 및 토출되는 흡입구 및 토출구가 형성된 상부 실린더 및 하부 실린더와; 상기 상부 실린더 및 하부 실린더의 중심과 동심상으로 설치되어 시계 및 반시계 방향으로 회전하도록 설치되는 구동축과; 상기 구동축에 구동축과 일정량 편심되게 형성되어, 상기 상부 실린더 및 하부 실린더 내부에 각각 배치되는 상,하부 편심캠부와; 상기 상,하부 편심캠부의 외측에 상대 이동 가능하게 설치되고, 상기 구동축이 일방향으로 회전시 구동축 중심과 일정 거리 편심되게 결합되어 그 외주면이 상,하부 실린더의 내주면과 접촉 상태를 유지하면서 회전하고, 상기 구동축이 반대방향으로 회전시 구동축 중심과 대체로 동심을 이루도록 결합되어 그 외주면이 상,하부 실린더의 내주면과 비접촉 상태를 유지하면서 회전하도록 된 중공의 상,하부 롤러부재와; 상기 상,하부 롤러부재의 외주면과 계속적으로 접촉하도록 상기 상,하부 실린더에 탄성적으로 설치되는 상,하부 베인을 포함하여 구성되고; 상기 상,하부 롤러부재는 어느 한 쪽이 구동축과 편심을 이룰 때 다른 한 쪽이 구동축과 대체로 동심을 이루도록 됨을 특징으로 하는 이중용량 로터리 압축기를 제공한다. The present invention for this purpose is formed with an internal volume of a predetermined size, the upper cylinder and the lower cylinder is formed with a suction port and a discharge port through which the working fluid is sucked and discharged; A drive shaft installed concentrically with the center of the upper cylinder and the lower cylinder to rotate in a clockwise and counterclockwise direction; An upper and lower eccentric cam portions formed on the driving shaft so as to be eccentric with the driving shaft and disposed in the upper cylinder and the lower cylinder, respectively; It is installed on the outer side of the upper and lower eccentric cam portion so as to be relatively movable, the drive shaft is rotated in one direction and eccentrically coupled to the center of the drive shaft, the outer peripheral surface is rotated while maintaining contact with the inner peripheral surface of the upper, lower cylinders, A hollow upper and lower roller member coupled to form a ...

Fluid Compressor Or Pump Apparatus

本发明涉及一种装置，其可呈泵或压缩机的形式，并且其能用来压缩或加速流体，比如空气、气体、气态混合物和/或液体。尤其，本发明提供了一种机构，其中流体能连续地进入每个构成压缩腔的径向隔室，并且然后从其中排出。