JP6750240B2 - Air conditioner - Google Patents

Description

The present invention relates to an air conditioner having a refrigeration circuit using a vortex tube.

In some air conditioners, a vortex tube is used in the refrigeration circuit. For example, in Patent Document 1, an air conditioner in which a compressor, a condenser, an expansion mechanism, and an evaporator are sequentially connected to constitute a refrigeration circuit for circulating a refrigerant, and a vortex tube is provided between the compressor and the condenser. Is disclosed. The vortex tube has a refrigerant supply port, a high temperature refrigerant discharge port, and a low temperature refrigerant discharge port. The refrigerant supply port of this vortex tube is connected to the refrigerant discharge side refrigerant pipe of the compressor, the high temperature refrigerant discharge port of the vortex tube is connected to the condenser, and the low temperature refrigerant discharge port of the vortex tube is connected to the suction port of the compressor. It is connected. Further, an electromagnetic opening/closing valve whose opening is controlled only when heating is started is provided between the refrigerant supply port of the vortex tube and the discharge port of the compressor. The high-temperature and high-pressure gas refrigerant discharged from the compressor that has not reached the high-temperature and high-pressure state at the time of heating startup is first supplied to the vortex tube and separated into the high-temperature gas refrigerant and the low-temperature gas refrigerant. Since only the high temperature gas refrigerant of the separated refrigerant flows into the condenser, warm air can be blown even if the fan on the indoor unit side is rotated at the time of starting the heating. That is, in the refrigeration circuit described in Patent Document 1, the vortex tube is used for the purpose of extracting the high temperature gas refrigerant from the refrigerant discharged from the compressor at the time of starting heating.

JP-A-8-313096

However, in Patent Document 1, since the low temperature gas refrigerant discharged from the low temperature refrigerant discharge port of the vortex tube circulates as it is to the compressor, this low temperature gas refrigerant has not been effectively utilized in the refrigeration circuit. Therefore, there was room for improving the capacity of the refrigeration circuit.

In view of the above circumstances, an object of the present invention is to provide an air conditioner capable of improving the performance of a refrigeration circuit by utilizing a refrigerant circulating between the vortex tube and the compressor in the refrigeration circuit using the vortex tube. Is to provide.

To achieve the above object, in the air conditioner of the present invention, during cooling operation, the refrigerant is a compressor, a refrigerant supply port of a vortex tube to a high temperature refrigerant discharge port, a first heat exchanger, and a first supercooling heat exchanger. A refrigerating circuit in which the expansion valve and the second heat exchanger are sequentially circulated, and the refrigerant is sequentially circulated from the refrigerant supply port of the compressor and the vortex tube to the low temperature refrigerant discharge port and the first subcooling heat exchanger. The first supercooling heat exchanger heat-exchanges the high-pressure refrigerant flowing out from the first heat exchanger with the low-temperature gas refrigerant flowing out from the low-temperature refrigerant discharge port of the vortex tube.

In the air conditioner of the present invention, during the heating operation, the refrigerant flows from the compressor, the refrigerant supply port of the vortex tube to the high-temperature refrigerant discharge port, the second heat exchanger, the second supercooling heat exchanger, and the expansion. And a refrigeration circuit in which the refrigerant sequentially circulates through the valve, the first heat exchanger, and the refrigerant sequentially circulates through the compressor, the refrigerant supply port of the vortex tube, the low-temperature refrigerant discharge port, and the second supercooling heat exchanger. In the second subcooling heat exchanger, the high-pressure refrigerant flowing out from the second heat exchanger and the low-temperature gas refrigerant flowing out from the low-temperature refrigerant discharge port of the vortex tube are heat-exchanged.

In the air conditioner of the present invention, the air conditioner further includes a first pressure sensor that measures the pressure at the outlet of the nozzle of the vortex tube, and a second pressure that measures the pressure on the high temperature refrigerant outlet side of the vortex tube. A sensor, a third pressure sensor for measuring the pressure on the low temperature refrigerant outlet side of the vortex tube, a first temperature sensor for measuring the temperature on the high temperature refrigerant outlet side of the vortex tube, and a low temperature refrigerant outlet of the vortex tube. The temperature, pressure and flow rate of the refrigerant discharged from the vortex tube based on the second temperature sensor that measures the temperature on the outlet side, the measurement results of the first to third pressure sensors, and the first and second temperature sensors. The control unit controls the pressure at the outlet of the nozzle and the opening degree of the flow rate adjusting valve so that the ratio becomes a predetermined value.

According to the present invention, the performance of the refrigeration circuit can be improved.

The refrigeration circuit at the time of cooling operation of the air conditioner of one embodiment. The refrigeration circuit at the time of heating operation of the air conditioner of one embodiment. The block diagram of the control part of the air conditioning apparatus of one embodiment. The control flow of the control part of the air conditioning apparatus of one embodiment.

Embodiments of the present invention will be described below with reference to the drawings.

The refrigeration circuit 1 of the air conditioner 100 shown in FIGS. 1 and 2 includes a compressor 2, an oil separator 3, a vortex tube 4, a four-way valve 5, a first heat exchanger 6, and a first supercooling heat exchanger 7. From the expansion valve 8, the second subcooling heat exchanger 9, the second heat exchanger 10, the accumulator 11, the first check valve 12, the second check valve 13, the three-way valve 14 and the pipe P connecting them. Composed.

As shown in FIG. 1, the refrigeration circuit 1 includes a compressor 2, an oil separator 3, a vortex tube 4, a four-way valve 5, a first heat exchanger 6, and a first subcooling heat exchanger during a cooling operation. 7, an expansion valve 8, a second subcooling heat exchanger 9, a second heat exchanger 10, a four-way valve 5, an accumulator 11, and a main refrigeration circuit (main refrigeration circuit during cooling operation) sequentially connected to the compressor 2. , The compressor 2, the oil separator 3, the vortex tube 4, the three-way valve 14, the first subcooling heat exchanger 7, the first check valve 12, the accumulator 11, and the secondary refrigeration circuit sequentially connected to the compressor 2 ( A sub-refrigerating circuit is formed during cooling operation.

On the other hand, during the heating operation, the refrigeration circuit 1 has a compressor 2, an oil separator 3, a vortex tube 4, a four-way valve 5, a second heat exchanger 10, and a second subcooling heat exchange, as shown in FIG. Main refrigerating circuit (main refrigerating circuit during heating operation) sequentially connected to the device 9, the expansion valve 8, the first subcooling heat exchanger 7, the first heat exchanger 6, the four-way valve 5, the accumulator 11, and the compressor 2. And a compressor 2, an oil separator 3, a vortex tube 4, a three-way valve 14, a second subcooling heat exchanger 9, a second check valve 13, an accumulator 11, and a secondary refrigeration circuit sequentially connected to the compressor 2. (Secondary refrigeration circuit during heating operation) is formed.

The vortex tube 4 includes a coolant supply port 4a, a high temperature coolant discharge port 4b, and a low temperature coolant discharge port 4c. The refrigerant supply port 4 a of the vortex tube 4 is connected to the discharge port 2 a of the compressor 2 via the oil separator 3. The high temperature refrigerant discharge port 4b of the vortex tube 4 is connected to the four-way valve 5. The low temperature refrigerant discharge port 4c of the vortex tube 4 is connected to the inlet of the three-way valve 14. The vortex tube 4 is supplied with a high-temperature and high-pressure gas refrigerant discharged from the discharge port 2a of the compressor 2 from the refrigerant supply port 4a, and energy is separated by the Ranque-Hilsch effect to separate the high-temperature gas refrigerant and the low-temperature gas refrigerant. To do. At that time, when the refrigerant passes through the nozzle 4d on the refrigerant supply port 4a side of the vortex tube 4, the refrigerant reaches the refrigerant discharge port 4e of the nozzle 4d while performing decompression expansion close to isentropic expansion (adiabatic expansion). Separation occurs. The vortex tube 4 forms a high temperature refrigerant discharge path between the refrigerant supply port 4a and the high temperature refrigerant discharge port 4b, and a low temperature refrigerant discharge path between the refrigerant supply port 4a and the low temperature refrigerant discharge port 4c. The vortex tube 4 has a needle valve (not shown) in the nozzle 4d of the vortex tube on the refrigerant supply port 4a side, and a flow rate adjusting valve (not shown) in the high temperature refrigerant discharge port 4b side of the vortex tube 4. ) Has.

The four-way valve 5 has four ports, the first port 5a is connected to the high temperature refrigerant discharge port 4b of the vortex tube 4 as described above, the second port 5b is connected to the first heat exchanger 6, and the third port The port 5c is connected to the second heat exchanger 10, and the fourth port 5d is connected to the accumulator 11 as described above.

The first subcooling heat exchanger 7 has a main flow path 7a that is a part of the main refrigeration circuit and a sub flow path 7b that is a part of the sub refrigeration circuit. One refrigerant inlet/outlet 7c of the main flow path 7a is connected to the first heat exchanger 6, and the other refrigerant inlet/outlet 7d is connected to the expansion valve 8. One refrigerant inlet/outlet 7e of the sub flow passage 7b is connected to the three-way valve 14, and the other refrigerant inlet/outlet 7f is connected to the first check valve 12. The first subcooling heat exchanger 7 is used for subcooling during cooling operation, and heat is exchanged between the high-pressure refrigerant flowing from the first heat exchanger 6 and the low-temperature gas refrigerant flowing from the vortex tube 4. ing. During the heating operation, the low-temperature gas refrigerant that has flowed out of the vortex tube 4 by the three-way valve 14 described later flows into the second subcooling heat exchanger 9 described below, and the subflow of the first subcooling heat exchanger 7 is performed. Since it does not flow into the passage 7b, the first subcooling heat exchanger 7 does not function as a heat exchanger.

The second subcooling heat exchanger 9 has a main flow path 9a that is a part of the main refrigeration circuit and a sub flow path 9b that is a part of the sub refrigeration circuit, like the first subcooling heat exchanger 7. To be done. One refrigerant inlet/outlet port 9c of the main flow path 9a is connected to the expansion valve 8, and the other refrigerant inlet/outlet port 9d is connected to the second heat exchanger 10. One refrigerant inlet/outlet 9f of the sub-flow passage 9b is connected to the three-way valve 14, and the other refrigerant inlet/outlet 9e is connected to the second check valve 13. The second supercooling heat exchanger 9 is used for supercooling during heating operation, and heat-exchanges with the high-pressure refrigerant flowing from the second heat exchanger 10 and the low-temperature gas refrigerant flowing from the vortex tube 4. ing. During the cooling operation, the low-temperature gas refrigerant flowing out of the vortex tube 4 by the three-way valve 14 described later flows into the first subcooling heat exchanger 7, and the subflow passage 9b of the second subcooling heat exchanger 9 is flowed. Second subcooling heat exchanger 9 does not function as a heat exchanger.

The three-way valve 14 has three ports, the first port 14a is connected to the low temperature refrigerant discharge port 4c of the vortex tube 4 as described above, and the second port 14b is the first subcooling heat exchanger as described above. 7, and the third port 14c is connected to the sub-flow passage 9b of the second supercooling heat exchanger 9 as described above. The three-way valve 14 switches the connection destination to the sub flow passage 7b of the first subcooling heat exchanger 7 during the cooling operation, and connects the connection destination to the sub passage 9b of the second subcooling heat exchanger 9 during the heating operation. Switch.

Each of the first check valve 12 and the second check valve 13 is connected to a pipe P that connects the fourth port 5d of the four-way valve 5 and the accumulator 11.

The oil separator 3 separates and collects the refrigerating machine oil dissolved in the high pressure gas refrigerant discharged from the compressor 2 and returns it to the suction side of the compressor 2. This prevents the compressor 2 from being burned, and also prevents the performance deterioration of the vortex tube 4 and the heat transfer performance of various heat exchangers.

The first heat exchanger 6 is an outdoor heat exchanger, and functions as a condenser or a radiator during cooling operation, and functions as an evaporator during heating operation.

The second heat exchanger 10 is an indoor heat exchanger, and functions as an evaporator during cooling operation and as a condenser or radiator during heating operation.

The first check valve 12 is connected to the sub passage 7b of the first supercooling heat exchanger 7. The first check valve 12 is for preventing the refrigerant from flowing backward during the heating operation and flowing into the sub flow path 7b of the first subcooling heat exchanger 7 and the three-way valve 14.

The second check valve 13 is connected to the sub passage 9b of the second supercooling heat exchanger 9. The second check valve 13 is for preventing the refrigerant from flowing backward during the cooling operation and flowing into the sub flow passage 9b of the second subcooling heat exchanger 9 and the three-way valve 14.

In the refrigeration circuit 1 having this configuration, during the cooling operation, as shown in FIG. 1, the refrigerant is supplied to the vortex tube 4 via the compressor 2 and the oil separator 3 to generate a high temperature gas refrigerant and a low temperature gas refrigerant. To be separated. The low-temperature gas refrigerant separated by the vortex tube 4 is discharged from the fourth port 5d of the four-way valve 5 via the three-way valve 14, the sub-flow passage 7b of the first subcooling heat exchanger 7, and the first check valve 12. After merging with the low temperature refrigerant, it returns to the compressor 2 via the accumulator 11. On the other hand, the high temperature gas refrigerant separated by the vortex tube 4 expands from the first port 5a to the 22nd port 5b of the four-way valve 5, the first heat exchanger 6, the main flow passage 7a of the first supercooling heat exchanger 7, and the expansion. After merging with the low temperature refrigerant of the sub refrigeration circuit through the valve 8, the main flow passage 9a of the second supercooling heat exchanger 9, the second heat exchanger 10, and the third port 5c to the fourth port 5d of the four-way valve 5. , And returns to the compressor 2 via the accumulator 11.

Therefore, in the refrigeration circuit 1 during the cooling operation, the low-temperature gas refrigerant separated by the vortex tube 4 does not return to the compressor 2 as it is, but is discharged from the first heat exchanger 6 by the first subcooling heat exchanger 7. Since the generated high-pressure refrigerant is supercooled, the heat exchange capacity of the refrigeration circuit can be improved.

On the other hand, during the heating operation, as shown in FIG. 2, the refrigerant is supplied to the vortex tube 4 via the compressor 2 and the oil separator 3 and separated into a high temperature gas refrigerant and a low temperature gas refrigerant. The separated low-temperature gas refrigerant is passed through the three-way valve 14, the sub-flow passage 9b of the second subcooling heat exchanger 9, and the second check valve 13 to the low-temperature gas refrigerant from the fourth port 5d of the four-way valve 5. After joining, it returns to the compressor 2 via the accumulator 11. On the other hand, the separated high-temperature gas refrigerant is supplied from the first port 5a to the third port 5c of the four-way valve 5, the second heat exchanger 10, the main flow passage 9a of the second supercooling heat exchanger 9, the expansion valve 8, and the 1 After merging with the low temperature refrigerant of the sub refrigerating circuit through the main flow path 7a of the subcooling heat exchanger 7, the first heat exchanger 6, and the second port 5b to the fourth port 5d of the four-way valve 5, the accumulator 11 is connected. Return to compressor 2 via.

Therefore, even in the refrigeration circuit 1 during the heating operation, the low-temperature gas refrigerant separated by the vortex tube 4 does not return to the compressor 2 as it is, but is discharged from the second heat exchanger 10 by the second supercooling heat exchanger 9. Since the generated high-pressure refrigerant is supercooled, the heat exchange capacity of the refrigeration circuit can be improved.

As shown in FIGS. 1 to 3, in the air conditioner 100 of this embodiment, the first pressure sensor 16 and the high-temperature refrigerant discharge of the vortex tube 4 are connected to the discharge port 4e of the nozzle 4d on the refrigerant supply port 4a side of the vortex tube 4. The second pressure sensor 17 at the outlet 4b, the first temperature sensor 18 at the high temperature refrigerant discharge port 4b of the vortex tube 4, the third pressure sensor 19 at the low temperature refrigerant discharge port 4c of the vortex tube 4, and the low temperature refrigerant discharge port 4c of the vortex tube 4. A second temperature sensor 20, a pressure sensor 21 at the intake port 11a of the accumulator 11, a pressure sensor 22 at the discharge port 2a of the compressor 2, an indoor temperature sensor 24 near the first heat exchanger 6, and a second heat exchanger. An outdoor temperature sensor 23 is provided in the vicinity of 10.

The second pressure sensor 17 and the first temperature sensor 18 are provided at the high temperature refrigerant discharge port 4b of the vortex tube 4, and the third pressure sensor 19 and the second temperature sensor 20 are provided at the low temperature refrigerant discharge port 4c of the vortex tube 4, for example, in the vicinity of the pipe P. Is located in. A pressure sensor 21 is arranged at the suction port 11a of the accumulator 11 and a pressure sensor 22 at the discharge port 2a of the compressor 2, for example, near the pipe P. The indoor temperature sensor 24 is arranged, for example, on the windward side of the second heat exchanger 10, and is arranged at a position in contact with the sucked indoor air. Similarly, the outdoor temperature sensor 24 is also arranged, for example, on the windward side of the first heat exchanger 6, and is arranged at a position in contact with the sucked outdoor air.

As shown in FIG. 3, the control unit 25 of the air conditioner 100 inputs measured values from these various sensors 16 to 24, and rotates the compressor 2, the opening degree of the expansion valve 8, and the four-way valve 5. Switching, switching of the three-way valve 14, adjustment mechanism portion 4a of the opening degree of the needle valve of the nozzle 4d of the vortex tube 4, rotation speed of the indoor blower fan 26, rotation speed of the outdoor blower fan 27, high temperature refrigerant of the vortex tube 4. The opening degree of the flow rate adjusting valve on the discharge port 4b side is controlled.

Typically, the control unit 25 controls the direction switching of the four-way valve 5 and the direction switching of the three-way valve 14 to configure the refrigeration circuit 1 shown in FIG. 1 during the cooling operation, and to show the heating circuit in FIG. 2 during the heating operation. The refrigeration circuit 1 is configured.
Further, the control unit 25 controls the opening degree of the needle valve of the nozzle 4d of the vortex tube 4 and the opening degree of the flow rate adjusting valve of the vortex tube 4 on the high temperature refrigerant discharge port 4b side.

Conventionally, in the vortex tube 4, the mechanism for performing decompression expansion is in the nozzle 4d and the vortex chamber, and the decompression amount cannot be freely adjusted. Therefore, the pressure reduction amount is largely determined by the specifications of the nozzle structure, and it is difficult to employ this as the main pressure reduction and expansion mechanism. Furthermore, when liquid or gas-liquid two-phase refrigerant is introduced into the refrigerant supply port 4a of the vortex tube 4, energy separation does not occur. Therefore, in the present invention, the refrigerant supply port 4a of the vortex tube 4 is connected to the discharge port 2a side of the compressor 2 via the oil separator 3 and the high temperature superheated gas refrigerant is injected. At that time, in the oil separator 3, the refrigerating machine oil is separated from the high temperature gas refrigerant, and is injected into the refrigerant supply port 4a of the vortex tube 4 as a high temperature gas refrigerant without oil mist. In addition, the nozzle 4d of the vortex tube 4 is a variable nozzle (not shown), and its structure is, for example, by installing a needle valve inside the nozzle and adjusting the amount of throttling by varying the needle valve (for example, vertical movement amount). Pressure adjustment at the discharge port 4e of 4d and reliable energy separation are performed. At that time, the opening degree of the flow rate adjusting valve on the high temperature refrigerant discharge port 4b side of the vortex tube 4 is made to cooperate. More specifically, the pressure is measured by the first pressure sensor 16 at the outlet of the nozzle 4d on the refrigerant supply port 4a side of the vortex tube 4, and the control unit 25 uses the measured value to measure the flow rate on the high temperature refrigerant discharge port 4b side. Controls the opening of the adjusting valve. Here, the opening degree of the flow rate adjusting valve is linked with the opening degree adjustment of the needle valve by setting the temperature and pressure of the high temperature gas refrigerant to the flow rate ratio (flow rate ratio: low temperature gas refrigerant discharge amount/total mass flow rate) near a predetermined value. Alternatively, the main purpose is to converge to a predetermined range. Basically, the flow rate adjusting valve acts on the adjustment of the flow rate ratio and the temperature of each separated refrigerant, and the needle valve of the nozzle 4d adjusts the pressure of the discharge port 4e of the nozzle 4d. The cooperation of these two valves allows the discharge temperature and pressure of the high-temperature gas refrigerant and the low-temperature gas refrigerant to converge within a predetermined (target) range, thereby achieving good system efficiency.

For example, in order to lower the pressure of the discharge port 4e of the nozzle 4d with respect to the target value of the operating pressure of the refrigerant, the needle valve inside the nozzle of the vortex tube 4 is operated in the closing direction to reduce the pressure of the discharge port 4e of the nozzle 4d. Adjust. When it is necessary to raise the high temperature refrigerant discharge temperature of the vortex tube 4 with respect to the target values of the operating temperature and pressure of the refrigerant, the flow rate adjusting valve on the high temperature refrigerant discharge port 4b side of the vortex tube 4 is set so that the flow rate ratio becomes large. Operate in the closing direction. By lowering the pressure of the discharge port 4e of the nozzle 4d, the high temperature refrigerant discharge temperature of the vortex tube 4 tends to increase, and the low temperature refrigerant discharge temperature of the vortex tube 4 also tends to decrease. When it is desired to lower the low temperature refrigerant discharge temperature of the vortex tube 4 with respect to the target values of the operating temperature and pressure of the refrigerant, the flow rate is decreased, that is, the flow rate adjustment of the vortex tube 4 on the high temperature refrigerant discharge port 4b side. Operate the valve in the opening direction.
Such operation control is performed by the control unit 25. FIG. 4 is an example of the control flow.

The control unit 25 adjusts the opening degree of the needle valve inside the nozzle of the vortex tube 4 so that the pressure of the refrigerant becomes a predetermined value corresponding to the target value (step 401), and adjusts the pressure of the discharge port 4e of the nozzle 4d to the first value. 1 The pressure sensor 16 measures (step 402). Next, the control unit 25 adjusts the opening degree of the flow rate adjusting valve of the vortex tube 4 on the high temperature refrigerant discharge port 4b side so as to be a predetermined value corresponding to the target temperature and pressure of the refrigerant on the high temperature refrigerant discharge port 4b side. (Step 403), the temperature and pressure of the high temperature gas refrigerant discharged from the high temperature refrigerant discharge port 4b of the vortex tube 4 are measured by the first temperature sensor 18 and the second pressure sensor 17 (step 404). The control unit 25 repeats steps 403 and 404 until the target temperature and pressure of the refrigerant on the high temperature refrigerant outlet 4b side are reached, and when the target temperature and pressure are reached (step 405), the above flow rate ratio is measured (step). 406). Then, the control unit 25 repeats steps 401 to 406 N times until the target flow rate ratio is reached (steps 407 and 408).

The high-temperature gas refrigerant discharged from the high-temperature refrigerant discharge port 4b side of the vortex tube 4 is discharged into the first port 5a of the four-way valve 5, and the low-temperature gas refrigerant discharged from the low-temperature refrigerant discharge port 4c side of the vortex tube 4 is a three-way valve. It is introduced into the secondary flow path of either the first or the second subcooling heat exchanger 7 or 9 via 14 according to the cooling operation or the heating operation, and the adjustment ratio thereof realizes good system efficiency. Therefore, the above-mentioned target value is set, and is different between the cooling operation and the heating operation.
The present invention is not limited to the above embodiment.

For example, the nozzle 4d of the vortex tube 4 is not a variable nozzle as in the above-described embodiment, but a plurality of nozzles are installed and the number of used nozzles is controlled so that the variable nozzle has substantially the same function. You can

1 Refrigeration circuit 2 Compressor 3 Oil separator 4 Vortex tube 5 Four-way valve 6 First heat exchanger 7 First supercooling heat exchanger 8 Expansion valve 9 Second supercooling heat exchanger 10 Second heat exchanger 11 Accumulator 12 First check valve 13 Second check valve 14 Three-way valve 16 First pressure sensor 17 Second pressure sensor 18 First temperature sensor 19 Third pressure sensor 20 Second temperature sensor 21, 22 Pressure sensor 23, 24 Temperature Sensor 25 controller

Claims (2)

During the cooling operation, the refrigerant circulates sequentially from the compressor, the refrigerant supply port of the vortex tube to the high temperature refrigerant discharge port, the first heat exchanger, the first subcooling heat exchanger, the expansion valve, and the second heat exchanger, and A refrigeration circuit in which a refrigerant sequentially circulates through the compressor, a refrigerant supply port of a vortex tube, a low-temperature refrigerant discharge port, and the first subcooling heat exchanger, and the first subcooling heat exchanger includes: 1. Heat exchange between the high-pressure refrigerant flowing out of the heat exchanger and the low-temperature gas refrigerant flowing out from the low-temperature refrigerant discharge port of the vortex tube ,
During heating operation, the refrigerant flows from the compressor, the refrigerant supply port of the vortex tube to the high-temperature refrigerant discharge port, the second heat exchanger, the second subcooling heat exchanger, the expansion valve, and the first heat exchanger. A second refrigeration heat exchanger, wherein the refrigeration circuit sequentially circulates and the refrigerant circulates sequentially through the compressor, the vortex tube refrigerant supply port, the low temperature refrigerant discharge port, and the second subcooling heat exchanger; In the air conditioner , the high-pressure refrigerant flowing out from the second heat exchanger and the low-temperature gas refrigerant flowing out from the low-temperature refrigerant discharge port of the vortex tube are heat-exchanged . The air conditioner according to claim 1 , wherein
The air conditioner further comprises a first pressure sensor for measuring the pressure of the refrigerant passing through the outlet of the nozzle of the vortex tube,
A second pressure sensor for measuring the pressure of the refrigerant passing through the high temperature refrigerant discharge port side of the vortex tube;
A third pressure sensor for measuring the pressure of the low temperature refrigerant discharge port side of the vortex tube,
A first temperature sensor for measuring the temperature of the refrigerant passing through the high temperature refrigerant outlet side of the vortex tube;
A second temperature sensor for measuring the temperature of the low temperature refrigerant discharge port side of the vortex tube;
A flow rate adjusting valve for adjusting the temperature and pressure of the refrigerant on the high temperature refrigerant outlet side of the vortex tube,
Based on the measurement results of the first to third pressure sensors and the first and second temperature sensors, the temperature, pressure, and the low temperature gas of the refrigerant discharged from the high temperature refrigerant discharge port side of the vortex tube , with respect to the total mass flow rate. An air conditioner comprising: a control unit that controls the pressure at the outlet of the nozzle and the opening of the flow rate adjustment valve so that the flow rate ratio of the discharge amount of the refrigerant becomes a predetermined value.

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