Recovery of fermentation salts from dilute aqueous solutions

Drive unit for hand-held power tool

A drive unit (2) for a hand-held power tool includes a stator (8) located in the drive unit housing (6), an end member (12) provided at each of the opposite ends (10) of the stator (8), a rotor (14) provided with at least one permanent magnet (16), arranged in a receiving space (20) limited by the stator (8) and the end members (12), and the rotatably supported by a drive axle (18) on the end members (12); and a fan (22) rotatably connected with the drive axle (18) for generating a cooling flow (K) from one stator end (10) to another stator end (10) between an inner surface (26) of the drive unit housing (6) and an outer surface (28) of the stator (8) for cooling the stator (8) and the drive unit, with the stator outer surface (28) being provided with a plurality of deflection surfaces (32) extending transverse to the longitudinal extent (L) of the stator (8).

HANDHELD POWER TOOL WITH AIR-GUIDING ELEMENT

A handheld power tool, including a housing wall and a fan device with an air intake and an air outlet in the housing wall. The fan device has an air guide, and an outflow space is delimited between, on the one hand, the housing wall at the air outlet and, on the other hand, an outflow side of the air intake, as well as laterally by a first surface contour and by a second surface contour of the air guide. The first surface contour and the second surface contour each extend from the housing wall to the outflow side of the air-intake means, and the air-guiding element is shaped in such a way that the size of the cross-sectional surface of the outflow space increases continuously crosswise to the outflow direction of the air intake in the outflow direction.

Recovery of fermentation salts from dilute aqueous solutions

Dilute solutions of fermentation sales may be concentrated by extracting water using low-miscibility, low-molecular-weight secondary and tertiary amines, e.g. triethylamine (TEA), diisopropyl amine (DIA), N,N-diethylmethylamine (DEMA), and mixtures thereof. At 30° C.-55° C., which corresponds to typical fermentation temperatures, these low-molecular-weight amines or their mixtures, can extract large amounts of water from dilute aqueous solutions containing fermentation salts. Thus, dilute fermentation salt solutions can be concentrated by selectively removing water. At these low temperatures, the amine phase contains 20-35% water and a much reduced quantity of fermentation salt. When the temperature is raised, water phases out of the amine, allowing the amine to be recycled and reused to extract additional water. Using this approach, about 82.5% of water can be removed from a 3% dilute solution using conventional multistage, countercurrent extraction, thus providing a 15% concentrated fermentation ...

Suction Module and Hand-Held Power Tool With a Suction Module

A suction module which can be connected to a hand-held power tool, and a hand-held power tool including the suction module, is disclosed. The suction module includes a suction head which can receive a tool of the hand-held power tool that is rotatable around a tool axis and a fan with a fan wheel that is rotatable around a fan axis for suctioning air from the suction head. The suction head is connected to the fan by an intake channel, which in a first section runs along a longitudinal axis of the suction module and in a second section along a vertical axis of the suction module that is fixed transverse to the longitudinal axis. The fan axis runs parallel to a narrow axis, which is aligned transverse to the longitudinal axis and transverse to the vertical axis. 1. A suction module , comprising:a suction head;a suction housing;a fan disposed within the suction housing, wherein air from the suction head is suctionable by the fan and wherein the fan has a fan wheel that is rotatable around a fan axis;wherein the suction housing has a longitudinal axis, a vertical axis fixed transverse to the longitudinal axis, and a narrow axis having a smaller dimension than the longitudinal axis and the vertical axis, wherein the narrow axis is aligned transverse to the longitudinal axis and transverse to the vertical axis;and wherein the fan axis runs along the narrow axis.2. The suction module according to claim 1 , wherein the suction head is connected to the fan by an intake channel which runs in a first section along the longitudinal axis and in a second section along the vertical axis.3. The suction module according to claim 2 , wherein the fan axis is aligned transverse to a plane spanned by the first and the second section of the intake channel.4. The suction module according to claim 1 , wherein the fan wheel is directly drivable around the fan axis by a motor.5. The suction module according to claim 4 , wherein the fan axis is an axis of the motor.6. The suction module ...

BELT COOLING SYSTEM

A power tool having a housing, a motor, especially an electric motor, a drive shaft that can be driven by the motor, a belt drive for transmitting the driving force of the motor to a tool, and a first fan that serves to generate a first air path in the housing as well as to cool at least the motor. The first fan and the belt drive can be driven by the drive shaft. The power tool has a second fan that serves to generate a second air path in the housing as well as to cool at least the belt drive. 16-. (canceled)7. A power tool comprising:a housing;a motor;a drive shaft drivable by the motor;a belt drive for transmitting the driving force of the motor to a tool; anda first fan serving to generate a first air path in the housing as well as to cool at least the motor, the first fan and the belt drive drivable by the drive shaft; anda second fan serving to generate a second air path in the housing as well as to cool at least the belt drive.8. The power tool as recited in wherein the second fan is drivable by the drive shaft.9. The power tool as recited in wherein the first air path has a first intake opening on an outside of the housing and the second air path has a second intake opening on the outside of the housing claim 7 , and whereby the first and second intake openings are positioned on a side of the housing facing away from the tool.10. The power tool as recited in wherein the second fan is positioned with respect to the belt drive in such a way that at least part of the belt drive to be cooled is at least partially situated in an excess-pressure area generated by the second fan.11. The power tool as recited in wherein the first air path and the second air path are positioned at least partially separately from each other in the housing.12. The power tool as recited in wherein the second fan is made at least partially of metal.13. The power tool as recited in wherein the motor is an electric motor. The invention relates to a power tool that has a housing, a motor, ...

Drive unit for hand-held power tool

A drive unit (2) for a hand-held power tool includes a stator (8) located in the drive unit housing (6), an end member (12) provided at each of the opposite ends (10) of the stator (8), a rotor (14) provided with at least one permanent magnet (16), arranged in a receiving space (20) limited by the stator (8) and the end members (12), and the rotatably supported by a drive axle (18) on the end members (12); and a fan (22) rotatably connected with the drive axle (18) for generating a cooling flow (K) from one stator end (10) to another stator end (10) between an inner surface (26) of the drive unit housing (6) and an outer surface (28) of the stator (8) for cooling the stator (8) and the drive unit, with the stator outer surface (28) being provided with a plurality of deflection surfaces (32) extending transverse to the longitudinal extent (L) of the stator (8).

Hand-held electric power tool with monitoring of motor temperature

A hand-held electric power tool has a hand-held outer housing (23), an electric motor (1) with a fan (3) for generating a flow (4) of cooling air, and an electronics module (2) having an electronic motor control (2a) and a computing element (2b) for monitoring the motor temperature and including a motor temperature model (11), and a temperature sensor (5) arranged directly at the electronics module (2) and connected therewith.

Suction module and hand tool machine with suction module

Drive device for a hand tool

Ein handgeführtes Elektrogerät mit einer Antriebsvorrichtung (2) weist einen in einem Antriebsgehäuse (6) untergebrachten Stator (8) auf, der zwischen zwei Statorenden (10), an denen jeweils ein Abschlusselement (12) angeordnet ist, eine Längserstreckung (L) aufweist. Ferner weist die Antriebsvorrichtung (2) einen wenigstens einen Permanentmagnet (16) umfassenden Rotor (14), der in einem durch den Stator (8) und die Abschlusselemente (12) begrenzten Aufnahmeraum (20) angeordnet und über eine Antriebsachse (18) an den Abschlusselementen (12) drehgelagert ist, sowie einen Lüfter (22) auf, der mit der Antriebsachse (18) bewegungsgekoppelt ist und mittels dem zwischen einer Gehäuseinnenfläche (26) des Antriebsgehäuses (6) und einer Statoraußenfläche (28) des Stators (8) ein Kühlluftstrom (K) von einem der Statorenden (10) zu dem jeweils anderen Statorende (10) erzeugbar ist. Es ist vorgesehen, dass an der Statoraußenfläche (28) mehrere Prallflächen (32) ausgebildet sind, die sich quer zur Längserstreckung (L) des Stators (8) erstrecken. A hand-held electrical appliance with a drive device (2) has a stator (8) accommodated in a drive housing (6), which has a longitudinal extension (L) between two stator ends (10), on each of which a closure element (12) is arranged. Furthermore, the drive device (2) has a rotor (14) which comprises at least one permanent magnet (16) and which is arranged in a receiving space (20) delimited by the stator (8) and the terminating elements (12) and is driven by a drive axle (18) End elements (12) is rotatably mounted, and a fan (22) which is coupled for movement with the drive axle (18) and by means of between a housing inner surface (26) of the drive housing (6) and a stator outer surface (28) of the stator (8) Cooling air flow (K) of one of the stator ends (10) to the other end of the stator (10) can be generated. It is provided that on the stator outer surface (28) a plurality of baffles (32) are formed, which extend transversely to the ...