JP2009144677A - Gas pump and air conditioning arrangement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas pump capable of changing the flow direction of a gas by a simple structure. <P>SOLUTION: In this gas pump, a first port 25a and a second port 25b communicating with a pump chamber 28 are formed in a cylinder 25. A first in/out flow port communicating with the first port 25a and allowing a gas to flow therethrough and a second in/out flow port communicating with the second port 25b and allowing the gas to flow therethrough are formed in a hermetic vessel. The gas is discharged to the outside through the first in/out flow port, the first port 25a, the pump chamber 28, the second port 25b, and the second in/out flow port when a drive shaft 23 is rotated in the forward direction. When the drive shaft is rotated in the reverse direction, the gas is discharged to the outside through the second in/out flow port, the second port 25b, the pump chamber 28, the first port 25a, and the first in/out flow port. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a gas pump and an air conditioner in which the gas pump is incorporated.

Conventionally, in an air-conditioning apparatus including two refrigerant circuits on the heat source side and the heat transfer side, heat is generally transferred by a gas pump or a liquid pump in the heat transfer side refrigerant circuit.
Patent Document 1 describes the configuration of a refrigerant circuit that operates by switching between a cooling operation and a heating operation using a gas pump in the refrigerant circuit on the heat transfer side in the air conditioner.
In this air conditioner, in the refrigerant circuit on the heat transfer side, in order to switch between cooling operation and heating operation, the refrigerant always flows in one direction into the gas pump using a four-way valve.

On the other hand, if the function of the gas pump can be realized by rotating the motor drive shaft in the reverse direction, the four-way valve is not required and the refrigerant circuit on the heat transfer side is simplified.
As a means for realizing this, for example, in Patent Document 2, two gas pump mechanisms are arranged on both sides of a drive shaft via a one-way clutch, and each is switched and used depending on the rotation direction so that refrigerant gas flows in both directions. Is possible.

JP 7-269964 A JP-A-7-91385

  However, in this case, there are problems that two pump mechanisms are required and a complicated mechanism such as a one-way clutch is required.

  An object of the present invention is to provide a gas pump that can change the gas flow direction with a simple structure.

  It is another object of the present invention to provide an air conditioner that can be operated by switching between a cooling operation and a heating operation without using a four-way valve in the refrigerant circuit on the heat transfer side by using the gas pump.

The gas pump according to the present invention includes a sealed container, a motor provided inside the sealed container and having a drive shaft capable of rotating forward and reverse, and the drive shaft extending on a central axis fixed to the inner wall surface of the sealed container. And a circular cylinder having a circular cross section forming a pump chamber between the inner wall surface of the cylinder and the peripheral wall surface of the rotor by being eccentrically fixed to the drive shaft and approaching the inner wall surface of the cylinder And a plurality of vane grooves formed in the rotor so as to extend in the radial direction are provided so as to be slidable in the radial direction, and the distal end surface of the inner wall surface of the cylinder is caused by the centrifugal force caused by the rotation of the rotor. A gas pump comprising a vane sliding on
The cylinder is formed with a first port and a second port communicating with the pump chamber,
The closed container is formed with a first outflow inlet through which gas flows into and out of the first port and a second outflow inlet through which gas flows into and out of the second port,
Due to the positive rotation of the drive shaft, the gas is discharged to the outside through the first outlet, the first port, the pump chamber, the second port, and the second outlet.
Due to the reverse rotation of the drive shaft, the gas is discharged to the outside through the second outlet, the second port, the pump chamber, the first port, and the first outlet.

The gas pump according to the present invention includes a sealed container, a motor provided in the sealed container and having a drive shaft capable of rotating forward and reverse, and the drive shaft fixed on the inner wall surface of the sealed container on the central axis. An extended elliptical cylinder and a first pump chamber and a second pump between the inner wall surface of the cylinder and the peripheral wall surface of the rotor, which are fixed to the drive shaft so that the center axis line and the center axis line coincide with each other. A rotor having a circular cross-section partitioned into a pump chamber and a plurality of vane grooves formed to extend in the radial direction in the rotor are provided slidably in the radial direction. A gas pump provided with a vane whose tip surface slides on the inner wall surface of the cylinder,
The cylinder is formed with a first port and a second port communicating with the first pump chamber, a third port and a fourth port communicating with the second pump chamber, respectively. A communication path that connects the first port and the front third port is formed,
The closed container has a first outflow inlet through which gas flows into and out of the first port, a second outflow inlet through which gas flows into and out of the second port and the fourth port, respectively. Formed,
Due to the positive rotation of the drive shaft, the gas flows through the first outlet, the first port, the first pump chamber and the second port, the second outlet, and the first Discharged to the outside through the outflow inlet, the first port, the communication path, the third port, the second pump chamber, the fourth port, and the second outflow inlet;
Due to the reverse rotation of the drive shaft, the gas flows through the second outlet, the second port, the first pump chamber and the first port, and the second outlet. The gas is discharged outside through the outflow inlet, the fourth port, the second pump chamber, the third port, the communication path, the first port, and the first outflow inlet.

  In the air conditioner according to the present invention, the air conditioner includes two refrigerant circuits on the heat source side and the heat transfer side, and the drive shaft rotates forward and backward in the refrigerant circuit on the heat transfer side to supply the refrigerant gas. The gas pump which conveys heat through is incorporated.

  According to the gas pump of the present invention, the tip end surface of the vane slides on the inner wall surface of the cylinder by the action of the centrifugal force generated by the rotation of the forward and reverse rotating rotor, and the gas flow direction can be changed with a simple structure.

  Further, according to the air conditioning apparatus of the present invention, the refrigerant gas transfer direction can be changed without requiring a complicated mechanism, and the four-way valve is not required in the refrigerant circuit on the heat transfer side. It becomes possible to operate by switching the heating operation, and space and resource saving of the air conditioner can be achieved.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or equivalent members and parts will be described with the same reference numerals.
Embodiment 1 FIG.
1 is a refrigerant circuit diagram of an air-conditioning apparatus according to Embodiment 1 of the present invention, FIG. 2 is a front sectional view showing a gas pump 9 of FIG. 1, and FIG. 3 is an explanatory view of a pump mechanism portion of the gas pump 9 of FIG. is there.
The refrigerant circuit of the air conditioner is composed of a first refrigerant circuit 1 on the heat source side and a second refrigerant circuit 2 on the heat transfer side.
The first refrigerant circuit 1 includes a compressor 3, an outdoor heat exchanger 4, an expansion valve 5, a four-way valve 6 for switching between cooling operation and heating operation, and an intermediate for exchanging heat with the second refrigerant circuit 2. It is comprised with the heat exchanger 7, and the 1st refrigerant | coolant 10 is enclosed with the inside.
The second refrigerant circuit 2 includes an indoor heat exchanger 8, a gas pump 9, and an intermediate heat exchanger 7 for exchanging heat with the first refrigerant circuit 1, and a second refrigerant 11 is enclosed therein. ing.

The gas pump 9 incorporated in the second refrigerant circuit 2 is provided with a drive shaft 23 extending on the central axis inside a sealed container 21 having a circular cross section. A variable speed motor 22 is provided at the upper end of the drive shaft 23 so that the drive shaft 23 can rotate forward and backward. A rotor 24 having a circular cross section is fixed eccentrically to the drive shaft 23 at an intermediate portion of the drive shaft 23. The rotor 24 is formed with a pair of vane grooves 24a extending toward the center so as to face each other. A vane 26 slidable in the radial direction is inserted into each vane groove 24a.
A cylinder 25 having a circular cross section is fixed to the sealed container 21 on the outer periphery of the rotor 24. The central axis of the cylinder 25 coincides with the drive shaft 23 and the axis. Further, a disc-shaped first frame 27 a and second frame 27 b are fixed to both end faces of the cylinder 25. As the rotor 24 approaches the inner wall surface of the cylinder 25, a pump chamber 28 formed between the inner wall surface of the cylinder 25 and the peripheral wall surface of the rotor 24 and the first frame 27a and the second frame 27b is formed. Has been.
The first frame 27 a and the second frame 27 b are provided with a first bearing 29 a and a second bearing 29 b that support the drive shaft 23.

In the cylinder 25, a first port 25 a (left port in FIG. 3) and a second port 25 b (FIG. 3) communicated with the pump chamber 28 in the vicinity of a portion where the radial clearance with the rotor 24 is minimized. 3, the right port) is formed. The first port 25a is formed on the side surface of the sealed container 21 and communicates with a first outlet / inlet port 40a through which refrigerant gas flows in and out. The closed vessel 21 is attached with a first tube 9a communicating with the first outflow port 40a.
The second port 25 b communicates with the upper space in the sealed container 21, and a second outlet 40 b through which refrigerant gas flows in and out is formed on the axis of the drive shaft 23 on the top surface of the sealed container 21. Has been. A second pipe 9b communicating with the second outlet / inlet 40b is attached to the top surface of the sealed container 21.
The first pipe 9a is connected to the indoor heat exchanger 8 via a pipe. The second pipe 9b is connected to the intermediate heat exchanger 7 via a pipe.

At the lower end of the drive shaft 23, for example, a centrifugal pump type oil pump mechanism 30 described in JP-A-60-206988 is formed.
The oil pump mechanism 30 is eccentric to the drive shaft 23 and extends in the axial direction to form an eccentric hole 31. A cup 32 having a suction port 32 a at the center is attached to the lower end of the drive shaft 23. A first communication passage 34 a communicating with the first bearing 29 a is formed in the upper portion of the eccentric hole 31. A second communication passage 34 b communicating with the second bearing 29 b is formed in the middle portion of the eccentric hole 31.

Next, the operation of the air-conditioning apparatus according to Embodiment 1 of the present invention will be described.
First, the operation of the gas pump 9 will be described.
In FIG. 3, among the arrows shown on the rotor 24, a solid line arrow indicates a forward rotation (clockwise rotation) direction, a broken line arrow indicates a reverse rotation (counterclockwise rotation) direction, and the other solid line arrows indicate a forward rotation direction. The refrigerant gas flow direction and the broken-line arrows indicate the refrigerant gas flow direction during reverse rotation.
When the drive shaft 23 of the motor 22 rotates forward, the rotor 24 rotates through the drive shaft 23 in the direction of the solid arrow (clockwise). Rotates clockwise while sliding on the inner wall. By this pump action, the refrigerant gas flows into the pump chamber 28 through the first pipe 9a, the first outlet / inlet port 40a, and the first port 25a. The refrigerant gas conveyed by the vane 26 in the pump chamber 28 is discharged to the upper space in the second port 25b and the sealed container 21, and then is discharged from the second pipe 9b to the outside through the second outlet / inlet 40b. leak.

  On the other hand, when the drive shaft 23 of the motor 22 rotates counterclockwise, the rotor 24 rotates in the direction of the broken arrow (counterclockwise) via the drive shaft 23, and accordingly the pump chamber 28 also rotates counterclockwise. Accordingly, the vane 26 rotates counterclockwise while the tip end surface slides on the inner wall surface of the cylinder 25 by the action of centrifugal force. By this pumping action, the refrigerant gas flows into the upper space in the sealed container 21 through the second pipe 9b and the second outlet / inlet port 40b, and flows into the pump chamber 28 through the second port 25b. The refrigerant gas conveyed in the pump chamber 28 flows out from the first pipe 9a through the first port 25a and the first outlet / inlet port 40a.

  As described above, when the drive shaft 23 of the motor 22 rotates in the forward direction, the refrigerant gas flows from the first tube 9a to the second tube 9b, and when it rotates in the reverse direction, the refrigerant gas flows from the second tube 9b to the first tube 9a. Can be transported.

  In either case of forward rotation or reverse rotation of the drive shaft 23, the oil stored in the oil sump 33 at the bottom of the sealed container 21 is caused by the centrifugal force generated by the rotation of the drive shaft 23, and the suction port 32 a, the eccentricity. It is supplied to the first bearing 29a through the hole 31 and the first communication path 34a, and is also supplied to the second bearing 29a through the second communication path 34b.

Next, operation | movement of an air conditioning apparatus is demonstrated in Fig.4 (a) and FIG.4 (b).
4A shows the cooling operation, FIG. 4B shows the heating operation, and the arrows in the figure indicate the flow directions of the refrigerants 10 and 11.
First, the operation during the cooling operation will be described with reference to FIG. In the first refrigerant circuit 1, when the compressor 3 is driven, the first refrigerant 10, which is a low-temperature and low-pressure gas, becomes a high-temperature and high-pressure gas and flows into the outdoor heat exchanger 4 through the four-way valve 6. The first refrigerant 10 that has flowed into the outdoor heat exchanger 4 is heat-exchanged with outdoor air, cooled, and partially or wholly condensed. The first refrigerant 10 in a liquid or gas-liquid two-phase state expands through the expansion valve 5, enters a low-temperature, low-pressure gas-liquid two-phase state, and flows into the intermediate heat exchanger 7. The first refrigerant 10 that has flowed into the intermediate heat exchanger 7 cools the second refrigerant 11, enters a gas state, and flows into the compressor 3 again through the four-way valve 6.

  On the other hand, in the second refrigerant circuit 2, the gas pump 9 is driven in the forward rotation direction, and the second refrigerant 11 of low-pressure gas flows into the gas pump 9 from the first pipe 9a and flows out from the second pipe 9b. Into the intermediate heat exchanger 7. The second refrigerant 11 that has flowed into the intermediate heat exchanger 7 is cooled by the first refrigerant 10 that is in a low temperature state, and enters a liquid or gas-liquid two-phase state and flows into the indoor heat exchanger 8. The second refrigerant 11 flowing into the indoor heat exchanger 8 evaporates by cooling the indoor air. The second refrigerant 11 evaporated to become low-pressure gas flows into the gas pump 9 from the first pipe 9a again.

  Next, the operation | movement at the time of heating operation is demonstrated in FIG.4 (b). In the first refrigerant circuit 1, when the compressor 3 is driven, the first refrigerant 10, which is a low-temperature and low-pressure gas, becomes a high-temperature and high-pressure gas and flows into the intermediate heat exchanger 7 through the four-way valve 6. The 1st refrigerant | coolant 10 which flowed into the intermediate heat exchanger 7 heats the 2nd refrigerant | coolant 11, and a part or all is condensed. The first refrigerant 10 in a liquid or gas-liquid two-phase state expands through the expansion valve 5, enters a low-temperature / low-pressure gas-liquid two-phase state, and flows into the outdoor heat exchanger 4. The first refrigerant 10 that has flowed into the outdoor heat exchanger 4 is heated by the outdoor air to be in a gas state, and flows into the compressor 3 again through the four-way valve 6.

  On the other hand, in the second refrigerant circuit 2, the gas pump 9 is driven in the reverse rotation direction, and the second refrigerant 11 of high-pressure gas flows into the gas pump 9 from the second pipe 9b and flows out from the first pipe 9a. Flow into the indoor heat exchanger 8. Part or all of the second refrigerant 11 that has flowed into the indoor heat exchanger 8 is condensed by heating the indoor air. The second refrigerant 11 in a liquid or gas-liquid two-phase state flows into the intermediate heat exchanger 7 and is heated and evaporated by the first refrigerant 10 in a high temperature state. The second refrigerant 11 that has become a high-pressure gas flows into the gas pump 9 from the second pipe 9b again.

In the above operation, the second refrigerant circuit 2 has a low pressure during the cooling operation and a high pressure during the heating operation. Therefore, the density of the second refrigerant 11 sucked into the gas pump 9 is low during the cooling operation and high during the heating operation.
On the other hand, since the gas pump 9 includes the motor 22 that can change the rotation of the drive shaft 23, the rotational speed of the drive shaft 23 is increased during the cooling operation to increase the volume flow rate, and the drive shaft is used during the heating operation. It is possible to adjust the refrigerant flow rate appropriately by lowering the rotational speed of 23 to reduce the volume flow rate.

As described above, according to the air-conditioning apparatus according to Embodiment 1 of the present invention, in the second refrigerant circuit 2 on the heat transfer side, the vane 26 is centrifuged as the drive shaft 23 of the motor 22 rotates. The tip end surface rotates while sliding on the inner wall surface of the cylinder 25 by the action of the force, whereby the refrigerant gas can be easily conveyed.
Further, the direction in which the second refrigerant 11 is conveyed can be easily changed by changing the rotation direction of the drive shaft 23.
Thereby, in the 2nd refrigerant circuit 2, a cooling operation and a heating operation can be switched, without requiring a four-way valve, and space saving and resource saving of an air conditioning apparatus can be achieved.
Also, by setting the rotational speed of the drive shaft 23 high during the cooling operation and setting the rotational speed of the drive shaft 23 low during the heating operation, it is possible to adjust the refrigerant flow rate to an appropriate value during both the cooling operation and the heating operation. Efficient operation is possible.

Embodiment 2. FIG.
FIG. 5 is a sectional view showing the overall structure of a gas pump 9 applied to an air conditioner according to Embodiment 2 of the present invention, and FIG. 6 is an explanatory view showing the pump mechanism portion of FIG.
In this embodiment, the gas pump 9 incorporated in the second refrigerant circuit 2 is provided with a drive shaft 23 extending on the central axis inside a sealed container 21 having a circular cross section. An upper end portion of the drive shaft 23 is provided with a motor 22 capable of rotating the drive shaft 23 forward and backward and having a variable speed drive shaft 23. The drive shaft 23 passes through the center of the rotor 24 having a circular cross section. In the rotor 24, vane grooves 24a extending toward the center are formed at four locations at equal intervals in the circumferential direction. A vane 26 slidable in the radial direction is inserted into each vane groove 24a.
A cylinder 25 having an elliptical cross section is fixed to the sealed container 21 on the outer periphery of the rotor 24. The central axis of the cylinder 25 coincides with the axis of the drive shaft 23 and the rotor 24. Further, a disc-shaped first frame 27 a and second frame 27 b are fixed to both end faces of the cylinder 25.
In the cylinder 25, a first pump chamber 28 a and a second pump chamber 28 b are formed by the first frame 27 a, the second frame 27 b and the rotor 22. The first frame 27 a and the second frame 27 b are provided with a first bearing 29 a and a second bearing 29 b that support the drive shaft 23.

Further, the first port 25a and the second port 25b are formed in the cylinder 25 in the vicinity of a portion where the radial gap with the rotor 24 is minimized in the first pump chamber 28a. Further, a third port 25c and a fourth port 25d are formed in the vicinity of the portion where the radial gap with the rotor 24 is minimized in the second pump chamber 28a.
The first port 25a is formed on the side surface of the sealed container 21 and communicates with a first outlet / inlet port 40a through which refrigerant gas flows in and out. The closed vessel 21 is attached with a first tube 9a communicating with the first outflow port 40a. The first port 25a communicates with the third port 25c via a communication passage 25e formed extending in the circumferential direction inside the wall portion of the cylinder 25.

The second port 25 b communicates with the upper space in the sealed container 21, and a second outlet 40 b through which refrigerant gas flows in and out is formed on the axis of the drive shaft 23 on the top surface of the sealed container 21. Has been. A second pipe 9b communicating with the second outlet / inlet 40b is attached to the top surface of the sealed container 21. The fourth port 25 d communicates with the upper space in the sealed container 21.
The first pipe 9a is connected to the indoor heat exchanger 8 via a pipe. The second pipe 9b is connected to the intermediate heat exchanger 7 via a pipe.
Other configurations, that is, the motor 22 and the oil pump mechanism 30 are the same as those in the first embodiment.

Next, operation | movement of the gas pump 9 applied to the air conditioning apparatus which concerns on Embodiment 2 of this invention is demonstrated. In addition, the arrow in FIG.5 and FIG.6 has shown the direction of the same refrigerant | coolant as FIG.2 and FIG.3.
When the drive shaft 23 of the motor 22 rotates in the forward direction, the rotor 24 rotates through the drive shaft 23 in the clockwise direction indicated by the solid line arrow, and accordingly, each pump chamber 28 also rotates in the clockwise direction. Accordingly, the vane 26 rotates in the clockwise direction while the tip end surface slides on the inner wall surface of the cylinder 25 by the action of centrifugal force. By this pumping action, the refrigerant gas flows into the first port 25a from the first pipe 9a and the first outlet / inlet port 40a, and is divided into two at the first port 25a. One refrigerant gas directly flows into the adjacent first pump chamber 28a, and the other refrigerant gas flows into the different second pump chamber 28b through the third port 25c via the communication path 25e. The refrigerant gas transported in the pump chambers 28a and 28b passes through the second port 25b and the fourth port 25d and is discharged into the upper space in the sealed container 21, and then passes through the second outlet port 40b. It flows out of the machine from the second pipe 9b.

On the other hand, when the drive shaft 23 of the motor 22 rotates in the reverse rotation direction, the rotor 24 rotates in the counterclockwise direction indicated by the broken arrow through the drive shaft 23, and accordingly the vane 26 has its tip end surface caused by centrifugal force. While sliding on the inner wall surface of the cylinder 25, it rotates counterclockwise. By this pumping action, the refrigerant gas flows into the upper space in the sealed container 21 from the second pipe 9b and the second outlet / inlet 40b. Among them, the refrigerant gas flowing into the second port 25b is transported through the first pump chamber 28a and then flows out of the first pipe 9a through the first port 25a and the first inlet / outlet port 40a. . The refrigerant gas that has flowed into the fourth port 25d is transported through the second pump chamber 28b and then the first port 25a and the first outlet / inlet port 40a via the third port 25c and the communication passage 25e. Through the first pipe 9a.
With the above configuration, when the drive shaft 23 of the motor 22 rotates in the forward direction, the refrigerant gas is transferred from the first tube 9a to the second tube 9b, and when it rotates in the reverse direction, the refrigerant gas is transferred from the second tube 9b to the first tube 9a. Can be transported.

  The configuration and operation of the air conditioner in which the gas pump 9 of the second embodiment is incorporated in the second refrigerant circuit 2 are the same as those of the air conditioner according to the first embodiment, and the description thereof is omitted.

As described above, according to the air conditioner according to the second embodiment of the present invention, as in the first embodiment, as the drive shaft 23 of the motor 22 rotates, the vane 26 is subjected to the distal end surface by the action of centrifugal force. The refrigerant gas can be easily transported by rotating while sliding on the inner wall surface of the cylinder 25.
Further, the direction in which the second refrigerant 11 is conveyed can be easily changed by changing the rotation direction of the drive shaft 23.
Further, as in the first embodiment, the second refrigerant circuit 2 can switch between the cooling operation and the heating operation without requiring a four-way valve, and space and resource saving of the air conditioner can be achieved.
Further, by adjusting the rotation speed of the drive shaft 23 of the gas pump 9 during cooling operation and setting the rotation speed of the drive shaft 23 of the gas pump 9 low during heating operation, the refrigerant flow rate is adjusted to an appropriate value during both cooling and heating operations. It is possible to always operate appropriately and efficiently.

It is a refrigerant circuit figure of the air conditioning apparatus which concerns on Embodiment 1 of this invention. It is sectional drawing which shows the gas pump of FIG. It is explanatory drawing which shows the pump mechanism part of the gas pump of FIG. FIG. 4 (a) is an explanatory view showing the operation during cooling operation of the air-conditioning apparatus according to Embodiment 1 of the present invention, and FIG. 4 (b) is the heating operation of the air-conditioning apparatus according to Embodiment 1 of the present invention. It is explanatory drawing which shows operation | movement at the time. It is sectional drawing which shows the gas pump applied to the air conditioning apparatus which concerns on Embodiment 2 of this invention. It is explanatory drawing which shows the pump mechanism part of the gas pump of FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 1st refrigerant circuit, 2nd 2nd refrigerant circuit, 3 compressor, 4 outdoor heat exchanger, 5 expansion valve, 6 4-way valve, 7 intermediate heat exchanger, 8 indoor heat exchanger, 9 gas pump, 9a 1st Pipe, 9b second pipe, 10 first refrigerant, 11 second refrigerant, 21 airtight container, 22 motor, 23 drive shaft, 24 rotor, 24a vane groove, 25 cylinder, 25a first port, 25b first 2 port, 25c third port, 25d fourth port, 25e communication path, 26 vane, 27a, 27b frame, 28 pump chamber, 28a first pump chamber, 28b second pump chamber, 29a, 29b bearing 30 Oil pump mechanism, 40a first outlet, 40b second outlet.

Claims (7)

A sealed container;
A motor having a drive shaft provided inside the hermetic container and capable of forward and reverse rotation;
A cylindrical cylinder fixed to the inner wall surface of the sealed container and having the drive shaft extended on a central axis;
A rotor having a circular cross section that forms a pump chamber between the inner wall surface of the cylinder and the peripheral wall surface of the rotor by being eccentrically fixed to the drive shaft and approaching the inner wall surface of the cylinder;
A plurality of vane grooves formed in the rotor so as to extend in the radial direction are provided so as to be slidable in the radial direction, and the tip surface slides on the inner wall surface of the cylinder by the action of centrifugal force caused by the rotation of the rotor. A gas pump comprising a vane,
The cylinder is formed with a first port and a second port communicating with the pump chamber,
The closed container is formed with a first outflow inlet through which gas flows into and out of the first port and a second outflow inlet through which gas flows into and out of the second port,
Due to the positive rotation of the drive shaft, the gas is discharged to the outside through the first outlet, the first port, the pump chamber, the second port, and the second outlet.
Due to the reverse rotation of the drive shaft, the gas is discharged to the outside through the second outflow inlet, the second port, the pump chamber, the first port, and the first outflow inlet. And gas pump. A sealed container;
A motor having a drive shaft provided inside the hermetic container and capable of forward and reverse rotation;
An elliptical cylinder fixed to the inner wall surface of the sealed container and having the drive shaft extended on a central axis;
A circular cross section that is fixed to the drive shaft so that the central axis coincides with the central axis and is divided into a first pump chamber and a second pump chamber between an inner wall surface of the cylinder and a peripheral wall surface of the rotor. The rotor,
A plurality of vane grooves formed in the rotor so as to extend in the radial direction are provided so as to be slidable in the radial direction, and the tip surface slides on the inner wall surface of the cylinder by the action of centrifugal force caused by the rotation of the rotor. A gas pump comprising a vane,
The cylinder is formed with a first port and a second port communicating with the first pump chamber, a third port and a fourth port communicating with the second pump chamber, respectively. A communication path that connects the first port and the front third port is formed,
The closed container has a first outflow inlet through which gas flows into and out of the first port, a second outflow inlet through which gas flows into and out of the second port and the fourth port, respectively. Formed,
Due to the positive rotation of the drive shaft, the gas flows through the first outlet, the first port, the first pump chamber and the second port, the second outlet, and the first Discharged to the outside through the outflow inlet, the first port, the communication path, the third port, the second pump chamber, the fourth port, and the second outflow inlet;
Due to the reverse rotation of the drive shaft, the gas flows through the second outlet, the second port, the first pump chamber and the first port, and the second outlet. A gas pump that is discharged to the outside through an outflow inlet, a fourth port, the second pump chamber, the third port, the communication path, the first port, and the first outflow inlet.   The gas pump according to claim 1 or 2, wherein the drive shaft of the motor has a variable speed.   4. A centrifugal pump type oil pump mechanism that is provided at an end portion of the drive shaft and supplies oil to a bearing of the drive shaft provided across the rotor. The gas pump according to item 1. In an air conditioner comprising two refrigerant circuits on the heat source side and the heat transfer side,
The air conditioning apparatus according to any one of claims 1 to 4, wherein the gas pump according to any one of claims 1 to 4 is incorporated in the refrigerant circuit on the heat conveying side through refrigerant gas. .   The air conditioner according to claim 5, wherein the rotation direction of the drive shaft of the gas pump is switched between a cooling operation mode and a heating operation mode.   The air conditioner according to claim 5 or 6, wherein the number of rotations of the drive shaft is larger in the cooling operation mode than in the heating operation mode.

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