KR100748112B1 - Flash gas reducing type air-conditioner - Google Patents

Abstract

A flash gas reducing type air conditioner is provided to separate flash gas and oil from refrigerant stably in a simple structure by a flash gas/oil separation unit, thereby stabilizing liquid refrigerant supply. A flash gas reducing type air conditioner includes an air supply duct(10) for supplying atmospheric air into a room, and an exhaust duct(20) for discharging room air to the outside. A refrigerating unit(30) has a first heat exchanger(31) mounted in the air supply duct, a compressor(32) connected to the first heat exchanger, a second heat exchanger(33) connected to the compressor and mounted in the air exhaust duct, a receiver tank(34) mounted on the way between the first and second heat exchanger, and an expansion valve(35). A gas/oil separating unit(40) is mounted between the expansion valve and the first heat exchanger for separating flash gas and oil from refrigerant to introducing liquid refrigerant into the first heat exchanger. A pipe connection part(50) connects the refrigerating unit to the gas/oil separating part for carrying out cooling/heating operation via the refrigerating unit.

Description

FLASH GAS REDUCING TYPE AIR-CONDITIONER

1 is a block diagram showing an air conditioner according to the present invention,

2 is an enlarged configuration diagram of main parts of an air conditioner according to the present invention;

3 is a configuration diagram showing a cooling operation state according to the present invention,

4 is a block diagram showing a heating operation state according to the present invention,

5 is a configuration diagram showing another embodiment of an air conditioner according to the present invention;

6 is a configuration diagram showing another embodiment of an air conditioner according to the present invention;

Figure 7 is a block diagram showing a conventional refrigeration apparatus.

* Explanation of symbols for the main parts of the drawings

10: air supply duct 11: air supply fan

20: exhaust duct 21: exhaust fan

30: refrigeration unit

   31: first heat exchanger 32: compressor

   33: second heat exchanger 34: receiver

   35 expansion valve 36 auxiliary heat exchanger

40: gas oil separator

   41: separation tank 42: flash gas discharge pipe

   43: oil discharge pipe

50: pipe connection

   51: first connector 52: second connector

   53: third connector 54: fourth connector

   55: fifth connector

60: constant temperature and humidity

   61: constant temperature and humidity induction pipe 62: constant temperature and humidity heat exchanger

   63: constant temperature and humidity discharge pipe

The present invention relates to an air conditioner for cooling and heating used for cooling and heating in a room. More specifically, the flash gas and oil are separated by a simple structure to facilitate the separation of flash gas and oil. It relates to a reduced type air conditioner.

In general, an air conditioner for cooling and heating refers to a device that maintains indoor air in a pleasant state by maintaining the indoor temperature in an appropriate state by simultaneously heating or cooling while supplying external air to the room.

The air conditioner for cooling and heating uses a refrigerating device that forms a series of refrigeration cycles to heat or cool the air, and the refrigerating device is a heat pump that circulates the coolant in reverse and uses heat generated from the coolant or heat of condensation. Air conditioning is to be done.

As such a conventional refrigeration apparatus, there is a "refrigeration cycle system having a fresh gas purge control means" (patent registration No. 530000 No. 2005.11.14.), Which has been filed and registered by the present applicant, which is shown in FIG. The following describes the working relationship with.

As shown in FIG. 7, the conventional refrigeration apparatus includes an evaporator 100, a compressor 200, a condenser 300, and an expansion valve 400 to form a series of refrigeration cycles, and the expansion valve 400. The purge control means 500 is installed on the conduit between the evaporator 100.

The purge control means 500 removes the flash gas generated by passing through the expansion valve 400 and remaining in the gaseous state instead of completely liquefied to remove the flash gas generated in the liquid phase from the expansion valve 400 to the evaporator 100. The refrigerant is supplied to prevent the deterioration of efficiency caused by the flash gas, thereby significantly improving the refrigeration efficiency.

However, the above conventional technology has the following problems.

When the conventional refrigeration apparatus is applied to an air conditioner and used, there is a problem in that the cooling and heating performance is lowered due to the oil contained in the refrigerant liquid.

The reduction in the cooling and heating performance as described above increases the consumption of energy, this increase in energy consumption has been a factor to increase the maintenance cost of the air conditioner.

In addition, when the conventional refrigerating device is applied to the air conditioner, the refrigerant liquid passing through the expansion valve is a low pressure state, there is a problem that the supply of the refrigerant liquid to the evaporator is not stable.

Accordingly, the present invention improves the "refrigeration cycle system having a fresh gas purge control means" (patent registration No. 530000 2005.11.14.), Which the applicant has already filed and registered in order to solve the conventional problems as described above. Applied to the air conditioner,

It is an object of the present invention to provide a flash gas reduction type air conditioner having a simple structure, which facilitates separation of flash gas and oil, thereby significantly reducing cooling and heating performance.

In addition, another object of the present invention is to provide a flash gas reduction type air conditioner to ensure a stable and smooth supply of the refrigerant liquid by the increase in the internal pressure, and at the same time a stable and smooth separation of the flash gas and oil.

In addition, another object of the present invention is to absorb the heat contained in the indoor air discharged to the outside in multiple stages to further reduce the energy saving while miniaturization of the second heat exchanger installation of the second heat exchanger inside the exhaust duct It is to provide a flash gas reduction type air conditioner to be made easily.

In addition, another object of the present invention is to provide a flash gas reduction type air conditioner to make a constant temperature and humidity of the air supplied to the room with a simple structure smoothly and stably.

In order to achieve the object of the present invention as described above, the flash gas reduction type air conditioner according to a preferred embodiment of the present invention has an air supply fan, the air supply duct for supplying the outside air to the room; An exhaust duct having an exhaust fan and discharging indoor air to the outside; A first heat exchanger installed inside the air supply duct, a compressor connected to the first heat exchanger, a second heat exchanger connected to the compressor and installed inside the exhaust duct, the second heat exchanger and a first heat exchanger A refrigeration unit including a receiver and an expansion valve installed on a conduit therebetween; A gas oil separator installed between the expansion valve and the first heat exchanger to separate flash gas and oil from the refrigerant so that a liquid refrigerant flows into the first heat exchanger; A pipe connection portion connecting a connection between the refrigeration unit and the gas oil separator in a pipeline so that a cooling and heating operation is performed through the refrigeration unit; It is characterized by including.

In addition, the pipe connection portion, the first connection pipe having a first branch pipe connected between the first heat exchanger and the compressor and connected between the first triangular valve and the receiver installed on the pipeline, and the compressor and the first A second connecting tube having a second branch pipe connected between the second heat exchanger and connected between the second triangular valve installed on the pipeline and the gas oil separator, and connected between the second heat exchanger and the receiver; A third connecting pipe having a third branch pipe connected between the third triangular valve and the first connecting pipe installed on the upper portion, and connected between the receiver and the second branch pipe with the expansion valve installed on the pipeline. And a fourth connecting pipe having a fourth branch pipe connected between the fourth triangular valve and the second connecting pipe installed on the pipeline, and connected between the gas oil separator and the first heat exchanger, and separating the gas oil. Gas hole formed by branching tip And a fifth connecting tube having a tube, and the liquid refrigerant supply pipe, characterized in that it comprises.

In addition, the pipe connection portion, characterized in that it further comprises a control valve installed in the second branch pipe and the fourth connection pipe so that the supply amount is controlled while the back flow of the refrigerant is prevented.

In addition, the pipe connection portion, characterized in that it further comprises an opening and closing valve which is respectively installed in the gas supply pipe and the liquid refrigerant supply pipe so that the opening and closing of the pipe in accordance with the heating and cooling operation.

In addition, the gas oil separator, the end of the second branch pipe is connected, the front end of the gas supply pipe is disposed in the upper upper portion, the liquid refrigerant supply pipe is disposed in the lower inner portion lower than the tip of the gas supply pipe and the specific gravity difference A separation tank separating the flash gas, the refrigerant liquid and the oil by a flash gas discharge tube having one end connected to the inner upper portion of the separation tank and the other end connected to the compressor, and a lower portion of the inner lower portion of the separation tank relatively lower than the liquid refrigerant supply pipe. One end is connected to the other end is characterized in that it comprises an oil discharge pipe, which is connected to the compressor.

In addition, the gas oil separation unit, a flash gas control valve installed in the flash gas discharge pipe to control the discharge of flash gas while preventing the reverse flow of flash gas, and the oil discharge pipe to control the discharge of oil while preventing the back flow of oil An oil control valve is installed on, characterized in that it further comprises.

The refrigeration unit may further include an auxiliary heat exchanger connected to the conduit of the second connection pipe and installed in the exhaust duct so that heat exchange is performed in two stages in the exhaust duct.

In addition, the constant temperature and humidity unit for circulating the high-temperature refrigerant gas discharged from the compressor to the air supply duct to maintain the air in the room temperature and humidity; It further comprises.

The constant temperature and humidity unit may include a constant temperature and humidity induction pipe having one end connected to the second connection pipe and having a supply control valve, and the other end of the constant temperature and humidity induction pipe connected to and installed in the air supply duct. And a constant temperature / humidity discharge tube having one end connected to the constant temperature / humidity heat exchanger and the other end connected to the third connection tube so that the refrigerant heat exchanged in the constant temperature / humidity heat exchanger is discharged.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing an air conditioner according to the present invention, Figure 2 is an enlarged configuration diagram of the main portion of the air conditioner according to the present invention.

As shown therein, the flash gas reduction type air conditioner has an air supply duct (10) having an air supply fan (11) for supplying the outside air to the room, and an exhaust duct having an exhaust fan (21) for discharging indoor air to the outside. 20, a refrigeration unit 30 forming a series of cooling and heating cycles, a gas oil separator 40 for separating flash gas and oil from a refrigerant circulated through the refrigeration unit 30, and the refrigeration unit 30 and a pipe connection part 50 for connecting the gas oil separator 40 to the pipe.

The air supply duct 10 sucks air at one end by the operation of the air supply fan 11 and supplies the air to the room through the other end. The exhaust duct 20 serves to suck the air in the room at one end by the operation of the exhaust fan 21 and to discharge it to the outside through the other end.

In addition, the refrigeration unit 30 has a first heat exchanger 31 installed inside the air supply duct 10, a compressor 32 connected to the first heat exchanger 31, and the compressor 32. And a second heat exchanger 33 connected to the exhaust duct 20 and installed on the conduit between the second heat exchanger 33 and the first heat exchanger 31. And an expansion valve 35.

The refrigeration unit 30 is connected to the pipeline by the pipe connection 50 to form a series of refrigeration cycle while forming a closed circuit to cool the air passing through the air supply duct 10 through the first heat exchanger (31) The cooling operation or the reverse operation of the refrigeration cycle is to heat the air passing through the air supply duct 10 through the first heat exchanger 31 to perform a heating operation.

In addition, the gas oil separator 40 is installed between the expansion valve 35 and the first heat exchanger 31 to separate the flash gas and oil from the refrigerant, through the separation of the flash gas and oil The pure liquid refrigerant may be introduced into the first heat exchanger 31, thereby significantly increasing the cooling efficiency by the first heat exchanger 31.

The gas oil separator 40 having such a role is installed between the expansion valve 35 and the first heat exchanger 31 and the separation tank 41 separating the flash gas, the refrigerant liquid and the oil by the specific gravity difference. And, one end is connected to the inner upper portion of the separation tank 41 and the other end is connected to the flash gas discharge pipe 42, the other end is connected to the inner bottom of the separation tank 41 and the other end is It includes an oil discharge pipe 43 connected to the compressor (32).

The separation tank 41 allows the refrigerant liquid having the flash gas and the oil to be layered due to the specific gravity difference while passing through the expansion valve 35. In other words, the separation tank 41 is located in the upper portion of the flash gas in the refrigerant liquid introduced after passing through the expansion valve 35, a pure liquid refrigerant layer is formed below the flash gas and the lower portion of the liquid refrigerant layer To layer the oil.

The flash gas discharge pipe 42 serves to discharge the flash gas collected in a layered state inside the separation tank 41 to the compressor 32, and the oil discharge pipe 43 is the separation tank 41. The oil collected in the lowermost layer of the inside) serves to discharge to the compressor (32).

The gas oil separator 40 further includes a flash gas control valve 44 installed in the flash gas discharge pipe 42. The flash gas control valve 44 controls the flash gas to be smoothly discharged to the compressor 32 by controlling the discharge time and the discharge of the flash gas while preventing the reverse flow of the flash gas discharged through the flash gas discharge pipe 42. Play a role.

The gas oil separator 40 further includes an oil control valve 45 installed at the oil discharge pipe 43. The oil control valve 45 serves to control the oil to be smoothly discharged to the compressor 32 by adjusting the discharge time and the discharge amount of the oil while preventing the back flow of the oil.

In addition, the pipe connection 50 is to connect between the refrigeration unit 30 and the gas oil separation unit 40 in the pipeline, the various devices to the pipes to facilitate the heating and cooling operation through the refrigeration unit (30). It connects to the phase.

The pipe connection 50 that serves as described above is connected between the first heat exchanger 31 and the compressor 32 and between the first three-way 511 and the receiver 34 installed on the pipeline. A first connecting pipe 51 having a first branch pipe 512 to be connected, a second triangular valve 521 and a gas connected between the compressor 32 and the second heat exchanger 33 and installed on a pipeline; Between the second heat exchanger 33 and the receiver 34 and the second connection pipe 52 having a second branch pipe 522 connected between the separation tank 41 of the oil separation unit 40 A third connecting pipe 53 having a third branch pipe 532 connected between the third triangular side 531 and the first connecting pipe 51 installed on the pipeline;

The third triangular valve 541 and the second connection pipe 52 connected between the receiver 34 and the second branch pipe 522 and installed on the pipe line with the expansion valve 35 installed on the line. The fourth connecting pipe 54 having a fourth branch pipe (542) connected between the) and the connection between the separation tank 41 and the first heat exchanger (31) of the gas oil separator (40) And a fifth connection pipe 55 having a gas supply pipe 551 and a liquid refrigerant supply pipe 552 formed by branching the front end connected to the separation tank 41.

The first connecting pipe 51 is to connect the refrigerant flows between the first heat exchanger 31 and the compressor (32). The first three-way valve 511 installed on the pipe line of the first connection pipe 51 receives the refrigerant discharged from the first heat exchanger 31 during the cooling operation through the first connection pipe 51 through the compressor 32. And the refrigerant discharged through the first connection pipe 51 from the first heat exchanger 31 to the first branch pipe 512 while being switched during the heating operation to the receiver 34. Serves to discharge.

The second connecting pipe 52 connects the refrigerant to flow between the compressor 32 and the second heat exchanger 33. The second triangular valve 521 installed on the pipeline of the second connection pipe 52 receives the refrigerant discharged from the compressor 32 during the cooling operation through the second connection pipe 52 through the second heat exchanger 33. And supply the refrigerant discharged from the compressor 32 through the second connecting pipe 52 to the second branch pipe 522 and flow to the separation tank 41 during the heating operation. Do it.

The third connecting pipe 53 connects the refrigerant to flow between the second heat exchanger 33 and the receiver 34. The third triangular valve 531 installed on the pipe of the third connection pipe 53 receives a refrigerant discharged from the second heat exchanger 33 during the cooling operation through the third connection pipe 53. 34), and during the heating operation, the refrigerant is discharged through the third connecting pipe 53 from the second heat exchanger 33 to the third branch pipe 532 to be switched to the compressor 32. It serves to flow to the first connecting pipe (51) connected.

The fourth connecting pipe 54 connects the refrigerant to the second branch pipe 522 via the expansion valve 35 in the receiver 34. The fourth triangular valve 541 provided on the pipeline of the fourth connection pipe 54 separates the refrigerant discharged from the receiver 34 through the fourth connection pipe 54 during the cooling operation. When the heating operation is switched to the refrigerant is discharged through the fourth connecting pipe 54 from the receiver 34 to the fourth branch pipe 542 connected to the second heat exchanger 33 It serves to flow to the second connecting pipe (52).

The fifth connecting pipe 55 is connected to the refrigerant flow from the separation tank 41 to the first heat exchanger (31). The tip of the fifth connecting pipe 55 is branched into the gas supply pipe 551 and the liquid refrigerant supply pipe 552 so that the pure liquid in the separation tank 41 through the liquid refrigerant supply pipe 552 during the cooling operation. The refrigerant is supplied to the first heat exchanger and serves to supply the gaseous refrigerant in the separation tank 41 to the first heat exchanger 31 through the gas supply pipe 551 during the heating operation.

The gas supply pipe 551 having such a role is disposed at an upper end of the separation tank 41 to supply gaseous refrigerant including flash gas to the first heat exchanger 31 during heating operation. The liquid refrigerant supply pipe 552 is disposed relatively lower than the tip of the gas supply pipe 551 into the separation tank 41 to supply pure liquid refrigerant to the first heat exchanger 31 during the cooling operation.

The pipe connection part 50 further includes a control valve 56 installed at each of the second branch pipe 522 and the fourth connection pipe 54. The control valve 56 serves to control the supply amount while preventing a backflow of the refrigerant flowing through the second branch pipe 522 and the fourth connection pipe 54.

The pipe connection part 50 further includes an on / off valve 57 installed in the gas supply pipe 551 and the liquid refrigerant supply pipe 552, respectively. The on-off valve 57 is to open and close the pipe of the gas supply pipe 551 and the liquid refrigerant supply pipe 552 in accordance with the cooling operation and heating operation.

That is, in the cooling operation, the on / off valve 57 installed in the gas supply pipe 551 is closed and the on / off valve 57 installed in the liquid refrigerant supply pipe 552 is opened. In contrast, in the heating operation, the gas supply pipe 551 is reversed. The on-off valve 57 installed in the liquid refrigerant supply pipe 552 is closed while the on-off valve 57 is opened.

3 is a configuration diagram showing a cooling operation state according to the present invention.

As shown in the drawing, the high pressure refrigerant gas discharged from the compressor 32 during the cooling operation is introduced into the second heat exchanger 33 through the second connection pipe 52.

At this time, the second heat exchanger 33 cools the refrigerant gas circulated therein while being heat-exchanged by the cold air of the room discharged to the outside by the exhaust fan 21 from the inside of the exhaust duct 20.

The refrigerant gas cooled by the second heat exchanger 33 flows into the receiver 34 through the third triangular side 531 through the third connecting pipe 53, and the third refrigerant is discharged from the receiver 34. 4 flows through the tube (54). At this time, the refrigerant is converted into the flash gas and the refrigerant liquid while passing through the expansion valve (35) installed in the fourth connecting pipe (54).

The refrigerant passing through the expansion valve 35 is introduced into the separation tank 41 through the second branch pipe 522 connected to the end of the fourth connecting pipe 54 via the fourth trilateral valve 541. . The flash gas and the coolant liquid introduced into the separation tank 41 are separated by the specific gravity and separated to the oil included therein, and then the coolant liquid through the liquid coolant supply pipe 552 by the opening and closing of the valve 57. Bay flows into the fifth connecting pipe (55).

The liquid refrigerant introduced into the fifth connection pipe 55 is supplied to the first heat exchanger 31 installed in the air supply duct 10, and the liquid refrigerant supplied to the first heat exchanger 31 is supplied to the air supply fan ( 11) is converted into the refrigerant gas by heat exchange with the air supplied from the outdoor to the indoor, thereby cooling the air supplied to the indoor room to cool the room.

The refrigerant gas generated while passing through the first heat exchanger 31 is introduced through the first connecting pipe 51 and then introduced into the compressor 32 again through the first three-way valve 511 to perform a series of refrigeration cycles. Will continue.

Flash gas and oil collected in the separation tank 41 during the refrigerating cycle as described above are introduced into the compressor 32 through the flash gas discharge pipe 42 and the oil discharge pipe 43 to be removed.

4 is a configuration diagram showing a heating operation state according to the present invention.

As shown in the drawing, the high-pressure refrigerant gas discharged from the compressor 32 during the heating operation is introduced into the second connecting pipe 52 after the second high pressure refrigerant gas 521 is installed in the second connecting pipe 52. The flow path is changed by the change of) and flows into the second branch pipe 522.

The refrigerant gas introduced into the second branch pipe 522 is introduced into the separation tank 41 through the second branch pipe 522, and the opening and closing valve 57 is opened in the separation tank 41. By the gas supply pipe 551 flows to the fifth connecting pipe (55). The refrigerant gas flowing into the fifth connection pipe 55 flows into the first heat exchanger 31 installed at the end of the fifth connection pipe 55.

At this time, the high temperature refrigerant gas supplied to the first heat exchanger 31 heats the air supplied to the room while heat-exchanging with the air supplied from the outside to the room through the air supply duct 10 by the operation of the air supply fan 11. Thus, the room is heated.

After the refrigerant passing through the first heat exchanger 31 is discharged through the first connecting pipe 51, the flow path is changed by switching of the first three-sided valve 511 installed in the first connecting pipe 51. And flows into the first branch pipe 512. The refrigerant introduced into the first branch pipe 512 flows into the fourth connection pipe 54 through the receiver 34 and passes through the expansion valve 35 installed in the fourth connection pipe 54.

The refrigerant passing through the expansion valve 35 flows into the fourth branch pipe 542 by switching the fourth triangular valve 541 installed in the fourth connecting pipe 54, and the fourth branch pipe 542. Refrigerant introduced into the second heat exchanger (33) through the second connecting pipe (52).

The refrigerant introduced into the second heat exchanger 33 is discharged through the third connecting pipe 53 after being heat-exchanged with warm air discharged to the outside through the exhaust duct 20 indoors, and the third connecting pipe ( 53 is introduced into the first connecting pipe 51 through the third branch pipe 532 by switching of the third triangular valve 531.

In this way, the refrigerant introduced into the first connecting pipe 51 is introduced into the compressor 32 again to heat the room while continuously performing a series of heating cycles.

5 is a configuration diagram showing another embodiment of an air conditioner according to the present invention.

As shown therein, the refrigeration unit 30 of the present air conditioner is connected to the conduit of the second connection pipe 52 and installed in the exhaust duct 20 in front of the second heat exchanger 33. Auxiliary heat exchanger 36 is further included.

The auxiliary heat exchanger (36) allows heat exchange in two stages in the exhaust duct (20) together with the second heat exchanger (33), thereby providing a heat exchanger having a larger capacity regardless of the size of the exhaust duct (20). It is easy to install.

In other words, the auxiliary heat exchanger 36 is connected to the second heat exchanger 33 in two stages when the size of the second heat exchanger 33 is to be enlarged as the capacity of the second heat exchanger 33 is increased. In accordance with this, the size of the exhaust duct 20 is inevitably increased.

6 is a configuration diagram showing another embodiment of an air conditioner according to the present invention.

As shown therein, the air conditioner further includes a constant temperature and humidity unit 60 for circulating the high temperature refrigerant gas discharged from the compressor 32 into the air supply duct 10 to maintain the air in the room at a constant temperature and humidity condition. .

The constant temperature and humidity part 60 having such a role is connected to the second connection pipe 52 and the constant temperature and humidity guide tube 61 having a supply control valve 611 and the constant temperature and humidity induction pipe 61. The other end of the constant temperature and constant heat exchanger 62 is installed in the air supply duct 10 and the end of the constant temperature and heat exchanger 62 so that the refrigerant heat exchanged in the constant temperature and humidity heat exchanger 62 is discharged. It is connected to the other end and includes a constant temperature and humidity discharge pipe 63 is connected to the third connecting pipe (53).

The constant temperature and humidity unit 60 is discharged from the compressor 32 and flows into the constant temperature and humidity heat exchanger 62 through the high temperature refrigerant gas flowing in the second connection pipe 52 through the constant temperature and humidity induction pipe 61. By heat exchange, the air passing through the first heat exchanger 31 installed in the air supply duct 10 serves to remove moisture while maintaining a constant temperature by heating the air supplied to the room.

The supply control valve 611 is to adjust the supply amount and the supply time of the high-temperature refrigerant gas flowing into the constant temperature and humidity heat exchanger 62 by a series of proportional control to facilitate the constant temperature and humidity of the air supplied to the room. .

As described above, the present invention has a simple structure, so that the separation of the flash gas and oil is performed smoothly and the heating and cooling performance is remarkably improved, thereby reducing the energy.

In addition, the present invention has an effect that the supply of the refrigerant liquid is made stable and smooth by the increase in the internal pressure, and at the same time, the separation of the flash gas and the oil is made stable and smooth.

In addition, the present invention smoothly absorbs the heat contained in the indoor air discharged to the outside to further reduce the energy saving while further miniaturization of the second heat exchanger has the effect that the installation of the second heat exchanger inside the exhaust duct can be easily Have

In addition, the present invention has the effect that the constant temperature and humidity of the air supplied to the room with a simple structure made smooth and stable.

Claims (9)

An air supply duct 10 having an air supply fan 11 and supplying outside air to the room; An exhaust duct 20 having an exhaust fan 21 for discharging indoor air to the outside; The first heat exchanger 31 installed inside the air supply duct 10, the compressor 32 connected to the first heat exchanger 31, and the exhaust duct 20 connected to the compressor 32. A second heat exchanger (33) installed inside the), and a receiver 34 and an expansion valve (35) installed on a conduit between the second heat exchanger (33) and the first heat exchanger (31). A refrigeration unit 30 including; A gas oil separator 40 installed between the expansion valve 35 and the first heat exchanger 31 to separate flash gas and oil from the refrigerant so that a liquid refrigerant flows into the first heat exchanger 31; Wow; A pipe connection portion 50 connecting the refrigeration unit 30 and the gas oil separator 40 to a pipeline so that the cooling and heating operation is performed through the refrigerating unit 30; Flash gas reduction type air conditioner comprising a. According to claim 1, The pipe connecting portion 50, A first branch pipe 512 connected between the first heat exchanger 31 and the compressor 32 and connected between the first triangular valve 511 installed on the conduit and the receiver 34. 1 connector 51, The second branch pipe 522 is connected between the compressor 32 and the second heat exchanger 33 and is connected between the second triangular valve 521 installed on the pipeline and the gas oil separator 40. A second connecting pipe 52 having A third branch pipe 532 connected between the second heat exchanger 33 and the receiver 34 and connected between the third triangular valve 531 and the first connection pipe 51 installed on the pipeline. The third connector 53 having a, The third triangular valve 541 and the second connection pipe 52 connected between the receiver 34 and the second branch pipe 522 and installed on the pipe line with the expansion valve 35 installed on the line. A fourth connecting pipe 54 having a fourth branch pipe 542 connected between A gas supply pipe 551 and a liquid refrigerant supply pipe 552, which are connected between the gas oil separator 40 and the first heat exchanger 31, and have a branched end connected to the gas oil separator 40. The fifth connector 55 having a, Flash gas reduction type air conditioner comprising a. The pipe connection part 50 of claim 2, A control valve 56 installed in each of the second branch pipe 522 and the fourth connection pipe 54 so as to control the supply amount while preventing the backflow of the refrigerant; Flash gas reduction type air conditioner, characterized in that it further comprises. The pipe connection part 50 of claim 2, Opening and closing valve 57 is provided in each of the gas supply pipe 551 and the liquid refrigerant supply pipe 552 to open and close the pipe in accordance with the heating and cooling operation, Flash gas reduction type air conditioner, characterized in that it further comprises. According to claim 2, wherein the gas oil separator 40, An end of the second branch pipe 522 is connected, and a tip of the gas supply pipe 551 is disposed on the upper inner side, and the liquid refrigerant supply pipe 552 is lower than the front end of the gas supply pipe 551 on the inner lower side. A separation tank 41 disposed to separate the flash gas, the refrigerant liquid, and the oil by a specific gravity difference; A flash gas discharge pipe 42 having one end connected to an inner upper portion of the separation tank 41 and the other end connected to the compressor 32; An oil discharge pipe 43 having one end connected to an inner lower portion of the separation tank 41 and the other end connected to the compressor 32 lower than the liquid refrigerant supply pipe 552, Flash gas reduction type air conditioner comprising a. According to claim 5, The gas oil separator 40, A flash gas control valve 44 installed in the flash gas discharge pipe 42 to control flash gas discharge while preventing backflow of the flash gas; Oil control valve 45 is installed in the oil discharge pipe 43 so that the discharge of oil is controlled while preventing the back flow of oil, Flash gas reduction type air conditioner, characterized in that it further comprises. The method of claim 2, wherein the refrigeration unit 30, Auxiliary heat exchanger (36) which is connected to the pipeline of the second connecting pipe (52) and installed in the exhaust duct 20 so that heat exchange in the second step in the exhaust duct (20), Flash gas reduction type air conditioner, characterized in that it further comprises. The method of claim 2, A constant temperature and humidity unit (60) for circulating the high temperature refrigerant gas discharged from the compressor (32) to the air supply duct (10) to maintain indoor air in a constant temperature and humidity condition; Flash gas reduction type air conditioner, characterized in that it further comprises. The method of claim 8 wherein the constant temperature and humidity unit 60, A constant temperature / humidity induction pipe 61 having one end connected to the second connection pipe 52 and having a supply control valve 611; A constant temperature / humidity heat exchanger (62) connected to the other end of the constant temperature / humidity induction pipe (61) and installed in the air supply duct (10); A constant temperature and humidity discharge pipe (63) having one end connected to the constant temperature and humidity heat exchanger (62) and the other end connected to the third connection pipe (53) to discharge the refrigerant heat exchanged in the constant temperature and humidity heat exchanger (62), Flash gas reduction type air conditioner comprising a.

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