Parallel-flow two-stage condensation heat pump water heater

Technical Field

The present invention relates to household appliances field, in particular to a heat pump water heater, in particular to a down flow type double-stage condensation heat pump water heater.

Background Art

Heat pump water heater is the water outlet temperature of the condensing temperature of the heat pump system of the decision. The R22 system, condensation temperature of the 65 [...] , corresponding system pressure is 2.75 MPa; for R410a system, condensation temperature of the 65 [...] , corresponding system pressure is 4.15 MPa, removing heat-exchange temperature difference, the water outlet temperature is 60 the become [...] on the market at present the water outlet temperature limit of the heat pump water heater. 60 the of [...] such as the temperature of water for bathing the field of life is already sufficient, but in some industrial field of a higher temperature is required, generally requires the 75-85 [...] , even more high water temperature.

In the already open application number is " the 200720104425. 2 in the literature of China Patent [...] , discloses a multi-stage solar hot water heater, wherein the water is in the water tank from the preceding stage has been in the water tank to a first heating the warm water, the level in the water tank after further heating, the temperature of hot water in the water tank to obtain improved by a relatively large margin, the use of the hot water discharged from the rear-level in the water tank, than the usual single-stage solar water heater effect is better. From the Patent application solves the problem that the structure of the water tank of the hot water temperature. However, there are also various levels of water in the water tank is limited, sometimes can not meet the requirement of using a large amount of hot water, such as some hotels, restaurants, schools often water in the solar water heater concentrated water during the night, only on the water level in the solar energy water heater cannot provide more people of requirements for water. At the same time, the irradiation time is long in the sunshine weather conditions, at all levels of the water in the solar energy water heater is heated to a high temperature, some out from the water tank, water resource and heat energy caused by the waste heat. On the one hand, heat water can not satisfy the requirements for water, on the one hand and to the loss of part of the hot water. Secondly, the solar water heater to meet the water for domestic use, as the drinking water is not yet received the requirements of the application.

At the same time, there is on the market at present some of the high-temperature hot water heat pump device, a special compressor is mixed in the high temperature working substance as to, its cost is high. Also the overlapping type double-stage compression technique, this technology needs to be as a result of the heat source side temperature is relatively high, its application places subject to certain restrictions.

Content of the invention

The technical problem to be solved by the invention is:to provide a two-stage condensation of the downflow heat pump water heater, which adopts the conventional refrigerant working medium, water can be heated to boiling, the structure is simple, high heating efficiency, reduces the waste of water resource and heat energy.

In order to solve the above technical problem, the present invention provides a parallel-flow type double-stage condensation heat pump water heater, comprises a massflow enthalpygain compressor, the heat pump water heater also includes a first-stage condenser, secondary condenser, vortex tube refrigerator, an economizer and an evaporator; the air supplying enthalpygain the exhaust opening of the compressor and a first-stage condenser, refrigerator inlet end of the vortex tube, the vortex tube refrigerator low-temperature exhaust-side, an economizer, a throttle valve, and an evaporator enthalpy are sequentially connected with the air suction port of the compressor to form a fluorine-side flow path; said air supply enthalpygain the exhaust opening of the compressor and a first-stage condenser, refrigerator inlet end of the vortex tube, the vortex tube refrigerator high-temperature exhaust-side, two-stage condenser, an economizer, a throttle valve, air enthalpy in the air supply opening of the compressor are connected together to form a fluorine-side air supply loop; said first stage condenser and the secondary condenser is connected by the pipe to form a water-side flow path, the water pump in the drives the flow path [...] the direction of flow of the water with the [...][...] the flow path in the same direction, thereby providing the heat exchange efficiency of the water flow and the [...].

According to the present invention the parallel-flow type double-stage condensation heat pump water heater, preferably the [...] the flow path in the water after being heated through a first-stage condenser, can reach the highest temperature the 60 [...]. Specific heating temperature, can be adjusted in the flow path on the water side of the water flow and to control [...] fluorine-side flow path in.

According to the present invention the parallel-flow type double-stage condensation heat pump water heater, preferably the a-stage condenser water after heating, and then after being heated by the secondary condenser, the water temperature can be up to 90 the above [...] , preferably, can be heated to boiling.

The downflow of the invention two-stage condensation heat pump water heater, which adopts the conventional refrigerant working medium, water can be heated to boiling, in order to meet some conditions that require relatively high temperature of the water. At the same time, the structure is simple, high heating efficiency, reduces the waste of water resource and heat energy.

Description of drawings

Figure 1 in the invention two-stage condensation [...] the structure schematic diagram of the heat pump water heater.

Mode of execution

The following, the embodiment for the present invention illustrated in the Figure for a more detailed description. The embodiment of this invention is only a description of the best mode of execution, the scope of the present invention is not any restriction.

Embodiment

As shown in Figure 1, in the invention two-stage condensation [...] the structure schematic diagram of the heat pump water heater. It includes air supply enthalpygain compressor 1, a first-stage condenser 2, two-stage condenser 4, vortex tube refrigerator 3, an economizer 5, throttle valve 6, 7 and an evaporator 8 ; the massflow enthalpygain compressor 1 of the exhaust outlet and a first-stage condenser 2, vortex tube refrigerator 3 air inlet, vortex tube refrigerator 3 low-temperature exhaust-side, an economizer 5, throttle valve 6, an evaporator 8 and a blowdown enthalpygain compressor 1 is connected with the air suction port forming fluorine-side flow path; said air supply enthalpygain compressor 1 of the exhaust outlet and a first-stage condenser 2, vortex tube refrigerator 3 the inlet end of the, vortex tube refrigerator 3 of the high-temperature exhaust-side, two-stage condenser 4, an economizer 5, the throttle valve 7 and air supply enthalpygain compressor 1 is connected with the air supply opening formed in the fluorine-side air supply loop; said first stage condenser 2 and the second-stage condenser 4 by a water pipe are connected together to form a water-side flow path, the water pump in the drives the flow path [...] the direction of flow of the water with the [...][...] the flow path in the same direction, thereby improving the heat exchange efficiency of the water flow and the [...].

Preferably, in the microreactor [...] of the water after being heated through a first-stage condenser, can reach the highest temperature the 60 [...]. Specific heating temperature, can be adjusted in the flow path on the water side of the water flow and to control [...] fluorine-side flow path in.

Preferably, the a-stage condenser water after heating, and then after being heated by the secondary condenser, the water temperature can be up to 90 the above [...] , preferably, can be heated to boiling.

Next, the temperature of the environment the 20 [...] , the water inlet temperature the 15 [...] , for example, to the invention the two-stage condensation [...] heat pump water heater to carry out a detailed introduction of the heating process:

Enthalpy from the air compressor 1 of the air exhaust of the 80 [...] high-temperature high-pressure refrigerant gas into a first-stage condenser 2, and the 15 [...] cold water heat exchange, the refrigerant is condensed into the 45 [...] enter the vortex tube refrigerator 3, at the same time to increase the temperature of the 55 [...] , it is the heat pump water heater direct-heating technology, then enters the second-stage condenser 4. Vortex tube refrigerator 3 after treatment in the refrigerant, a portion of the into the 120 [...] high-temperature gas from the vortex tube refrigerator 3 of the high-temperature exhaust-side enters the second-stage condenser 4 and 60 the hot water [...] heat exchange, the water temperature can be raised to 90 the above [...] , [...] boiling. Second-stage condenser 4 at the same time in the refrigerant is condensed to the 80 [...] into the economizer 5. Vortex tube refrigerator 3 in a portion of the -10 the other refrigerant [...] low-temperature gas from the vortex tube refrigerator 3 the low-temperature exhaust-side into the economizer 5 and 80 the heat exchange refrigerant [...]. -10 the temperature of the refrigerant [...] to increase the 40 [...] , the throttle valve 6 enters the evaporator after the throttle voltage 8 after heat absorption and evaporation, to return to the massflow enthalpygain compressor 1 ; 80 the refrigerant [...] to the 30 after [...] , the throttle valve 7 slightly throttling step-down and then into the massflow enthalpygain compressor 1 of the air supply chamber.

The downflow of the invention two-stage condensation heat pump water heater, which adopts the conventional refrigerant working medium, water can be heated to boiling, in order to meet some conditions that require relatively high temperature of the water. At the same time, the structure is simple, high heating efficiency, reduces the waste of water resource and heat energy.