KR20030076355A - Air conditioner - Google Patents

Abstract

The problem of the present invention is that despite the opening of the capacity control valve, it is possible to suppress the problem that the capacity control valve is closed due to the bellows or the valve rod following the refrigerant flow, thereby reducing the load on the compressor. To provide.

The main circuit of the apparatus has an accumulator 12, a compressor 13 and a heat exchanger. The bypass passage 3 returns excess refrigerant from the compressor 13 to the accumulator 12 and has a capacity control valve 4. The displacement control valve 4 has a base 41 having a valve chamber 40 having a refrigerant inlet 40a and a refrigerant outlet 40b, and a valve 41 which is movable in the axial length direction and is held in the valve chamber 40. A valve valve 42 having a portion 42C, a valve drive portion 46 which opens and closes the valve portion 42c by moving the valve rod 42, and an outer circumferential surface of the valve rod 42 are covered. The bellows 55 which seals the seal 40 is provided. The coolant outlet 40b is disposed to face the outer circumferential surface of the valve rod 42 or the outer circumferential surface of the bellows 55.

Description

Air Conditioning Equipment {AIR CONDITIONER}

The present invention relates to an air conditioner for operating a compressor for compressing a refrigerant in a drive unit such as a gas engine, and more particularly, to an air conditioner having a bypass passage for returning excess refrigerant from an compressor to an accumulator.

As an air conditioning apparatus, a gas engine driven air conditioning apparatus is demonstrated as an example. BACKGROUND ART As a gas engine driven air conditioner, a main circuit for cooling or heating and a bypass passage are known. The main circuit sucks and compresses a gas engine driven by the combustion of fuel gas, an accumulator for accommodating the refrigerant and separating the gaseous refrigerant and the liquid refrigerant, and a gaseous refrigerant of the accumulator driven by the gas engine and accompanying the drive. And a heat exchanger for performing air conditioning for heat exchange of the compressed refrigerant.

The bypass passage is for performing a bypass operation for returning the excess refrigerant of the compressor to the accumulator, and is provided in the main circuit so as to connect the compressor and the accumulator. The bypass passage is provided with a capacity control valve to be located between the compressor and the accumulator. The capacity control valve controls the capacity of the refrigerant flowing from the bypass passage to the accumulator.

This capacity control valve is shown in FIG. As shown in FIG. 4, the capacity control valve 400c includes a refrigerant inlet 400a through which the refrigerant flows from the compressor 130 and a refrigerant flowing out toward the accumulator 120 through the bypass passage 300. By moving the valve bar 420 and the movable valve bar 420 having a base 410 having an outlet 400b, a valve portion 420c for closing or opening the refrigerant outlet 400b of the base 410. The valve drive part 490 which has the drive motor which opens and closes the refrigerant | coolant outlet 400b, and the cylindrical bellows 550 which cover the outer peripheral surface of the valve rod 420 and seal the valve chamber 400c are provided.

In the bypass operation described above, excess refrigerant returns from the compressor 130 to the accumulator 120 after passing the bypass passage 300 and the capacity control valve 400c. At this time, the refrigerant flows into the valve chamber 400c from the refrigerant inlet 400a of the capacity control valve 400c, discharges from the refrigerant outlet 400b in the direction of the arrow W4, and flows to the accumulator 120 to the accumulator 120. Are accepted.

By the way, according to the conventional technique described above, a structure in which the refrigerant outlet 400b of the capacity control valve 400c faces the tip of the valve portion 420c of the valve rod 420 is employed. Therefore, when the refrigerant is discharged from the refrigerant outlet 400b in the direction of arrow W4, depending on the operating conditions, the refrigerant discharged from the refrigerant outlet 400b causes the bellows 550 or the valve rod 420 to flow in the refrigerant flow direction (arrow W4). Direction) may be displaced together. That is, there is a fear that the valve rod 420 follows the refrigerant flow direction (arrow W4 direction) while pulling the bellows 550 in the arrow W4 direction. The reason for this is that, as can be understood from Fig. 4, the moving directions of the valve rod 420 and the bellows 550 correspond to the refrigerant flow direction (arrow W4 direction) in the refrigerant outlet 400b.

According to the above-described prior art, in the bypass operation, although the capacity control valve 400c is opened, the bellows 550 or the valve rod 420 follows the flow of the refrigerant depending on the operating conditions, and the valve There is a fear that the valve portion 420c of the rod 420 closes the refrigerant outlet 400b momentarily and the capacity control valve 400c momentarily opens.

Although the valve portion 420c closes the refrigerant outlet 400b momentarily, the valve portion 420c is spaced apart from the refrigerant outlet 400b by the elastic return action of the bellows 550 and the refrigerant outlet 400b is opened. do.

As described above, in the bypass operation, although the capacity control valve 400c is opened, when the capacity control valve 400c is momentarily opened, upstream of the capacity control valve 400c in the bypass passage 300. In 300a, since the pressure of the refrigerant is rapidly increased, there is a fear that an unnecessary load is applied to the compressor 130.

In particular, when the refrigerant in the bypass passage 300 is a liquid refrigerant, the incompressibility of the refrigerant is increased. Therefore, the pressure of the refrigerant rapidly increases upstream 300a of the bypass passage 300, and the compressor 130 Unnecessary load may be applied. Specifically, when the air conditioner is started after a long time stop, since the liquefaction of the refrigerant in the compressor 130 proceeds easily to become an uncompressed fluid, the above-described problem occurs when the bypass operation is performed. There is concern.

The present invention has been made in view of the above situation, and when the refrigerant is discharged from the refrigerant outlet of the capacity control valve toward the accumulator, the refrigerant discharged from the refrigerant outlet of the capacity control valve displaces the bellows or the valve rod of the capacity control valve together. It is possible to suppress the problem that the bellows and the valve rod follow the refrigerant flow and close the capacity control valve even though the capacity control valve is open valve. It is a subject to provide an air conditioning apparatus.

1 is a circuit diagram of a gas engine driven air conditioning apparatus.

2 is a sectional view of the dose control valve;

3 is a sectional view schematically showing a capacity control valve according to another embodiment;

4 is a cross-sectional view schematically showing a capacity control valve used in a gas engine driven air conditioner according to a conventional example.

<Explanation of symbols for the main parts of the drawings>

1: main circuit

4: capacity control valve

11: gas engine (drive section)

12: accumulator

13: compressor

14: outdoor heat exchanger

17: indoor heat exchanger

40: valve chamber

40a: refrigerant inlet

40b: refrigerant outlet

41: base

42: valve rod

46 drive unit

49: drive motor

51, 52: drive shaft

55: bellows

An air conditioner according to the present invention includes a driving unit, an accumulator for accommodating a refrigerant and separating a gaseous refrigerant and a liquid refrigerant, a compressor driven by the driving unit for sucking and compressing the gaseous refrigerant of the accumulator accompanying the drive, and a compressed unit. A main circuit having a heat exchanger for performing heat exchange of the refrigerant for air conditioning,

A bypass passage installed to connect the compressor and the accumulator to return excess refrigerant from the compressor to the accumulator;

An air conditioner having a capacity control valve installed in a bypass passage so as to be located between a compressor and an accumulator, and controlling a capacity of a refrigerant flowing from the bypass passage to the accumulator,

Capacity control valve,

A movable valve bar having a base having a valve chamber having a refrigerant inlet through which a refrigerant in the bypass passage flows and a refrigerant outlet through which the refrigerant flows out toward the accumulator, and axially movable in the valve chamber of the base. And a driving portion for opening and closing the valve portion by moving the valve rod, and a cylindrical bellow for covering the outer circumferential surface of the valve rod and sealing the valve chamber.

The coolant outlet is characterized in that it is disposed opposite the outer peripheral surface of the valve rod or the outer peripheral surface of the bellows.

As described above, the refrigerant outlet of the displacement control valve opposes the outer circumferential surface of the valve rod or the outer circumferential surface of the bellows. For this reason, the movement direction of the valve rod or bellows of the capacity control valve is significantly different from the refrigerant outflow direction at the refrigerant outlet of the capacity control valve. Therefore, when the refrigerant from the compressor to the accumulator is discharged from the refrigerant outlet of the capacity control valve, the fear that the refrigerant discharged from the refrigerant outlet of the capacity control valve displaces the bellows or the valve rod together in the refrigerant flow direction.

That is, the risk that the bellows and the valve rod of the displacement control valve follow the displacement of the refrigerant flow is reduced. Therefore, in spite of opening the displacement control valve at the time of bypass operation, the problem that the displacement control valve is momentarily closed is suppressed.

According to the air conditioning apparatus according to the present invention, the coolant outlet and the coolant inlet are formed in the capacity control valve so that the center axis of the coolant outlet is intersected with the center axis of the valve rod, and the center axis of the coolant inlet is along the center axis of the valve bar. The form provided in the base can be employ | adopted.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described, referring drawings. The air conditioner according to the present embodiment is a gas engine driven air conditioner. First, the main circuit 1 concerning a gas engine driven air conditioning apparatus is demonstrated. The main circuit 1 performs cooling or heating, and includes an outdoor unit 10 and an indoor unit 16. The outdoor unit 10 is driven by a gas engine 11 serving as a driving unit driven by combustion of fuel gas, an accumulator 12 accommodating refrigerant in a state in which a gaseous refrigerant and a liquid refrigerant are separated, and a gas engine 11. And a fixed displacement compressor 13B for sucking and compressing the gaseous refrigerant of the accumulator 12 accompanying the driving, a variable displacement compressor 13 for sucking and compressing the gaseous refrigerant of the accumulator 12, and air conditioning. For this purpose, an outdoor heat exchanger 14 for performing heat exchange of the refrigerant is provided as a basic element. The compressors 13 and 13B are scroll compressors, and are interlocked by the gas engine 11 via a timing belt. Therefore, the gas engine 11 functions as a common drive source of the compressors 13 and 13B.

The indoor unit 16 of the main circuit 1 has, as a basic element, an indoor heat exchanger 17 for performing heat exchange of the refrigerant for air conditioning, and an expansion valve 18 for expanding the refrigerant.

The refrigerant inlet 15 of the compressor 13B and the refrigerant inlet 15 of the variable displacement compressor 13 are connected to the refrigerant outlet 12a of the accumulator 12 by a passage 1v.

The bypass passage 3 is for performing bypass operation for returning the excess refrigerant of the variable displacement compressor 13 to the accumulator 12. The bypass passage 3 is provided in the main circuit 1 so as to connect the refrigerant discharge port 19 of the variable displacement compressor 13 and the bypass port 12b of the accumulator 12. The bypass passage 3 is provided with a displacement control valve 4 so as to be located between the compressor 13 and the accumulator 12.

According to the air conditioning load of the main circuit 1, the rotation speed of the compressors 13 and 13B is controlled by a control system. In addition, the opening and closing of the capacity control valve 4 of the bypass passage 3 is controlled by the control system in accordance with the air conditioning load of the main circuit 1. Therefore, at the time of bypass operation, the surplus refrigerant compressed by the variable displacement compressor 13 is supplied to the bypass port 12b of the accumulator 12 via the bypass passage 3 without supplying the main circuit 1 to the main circuit 1. The flow rate of the refrigerant supplied to the main circuit 1 is thereby limited.

The basic path of the main circuit 1 at the time of cooling is demonstrated. When the gas engine 11 is driven by the fuel gas, the compressors 13 and 13B are driven, and the gaseous refrigerant of the accumulator 12 is sucked from the refrigerant outlet 12a of the accumulator 12 and the compressors 13 and 13B. Is compressed). The refrigerant compressed to high temperature and high pressure is discharged from the refrigerant discharge ports 20 of the compressors 13 and 13B, and the passage 1a, the oil separator 61, the first port 62a of the four-way valve 62, and the passage ( After 1b), the outdoor heat exchanger 14 is reached, and the high temperature and high pressure refrigerant is cooled in the outdoor heat exchanger 14 to be heat exchanged to liquefy. The refrigerant having liquefied advances to the expansion valve 18 through the passage 1c, the filter drier 63, the ball valve 65A, the passage 1d, and the strainer 17n, and in the expansion valve 18, It expands and becomes a low temperature. The refrigerant, which has become low temperature, passes through the strainer 17m to the indoor heat exchanger 17, heat exchanges in the indoor heat exchanger 17 to cool the room, and passes the passage 1e, the ball valve 65B, the passage 1f, The return port 12c of the accumulator 12 passes through the third port 62c of the four-way valve 62, the second port 62b of the four-way valve 62, the double tube heat exchanger 67, and the passage 1h. Return to The returned refrigerant is stored in the accumulator 12 in a state separated into a liquid refrigerant and a gaseous refrigerant.

Next, the basic path of the main circuit 1 at the time of heating is demonstrated. When the gas engine 11 is driven by the fuel gas, the compressors 13 and 13B are driven, and the gaseous refrigerant of the accumulator 12 is sucked from the refrigerant outlet 12a of the accumulator 12 and the compressors 13 and 13B. Is compressed). The refrigerant compressed to high temperature and high pressure is discharged from the refrigerant discharge port 20 of the compressors 13 and 13B, and passes through the passage 1a, the oil separator 61, and the third port 62c of the four-way valve 62, It passes through the passage 1f, the ball valve 65B, and the passage 1e, reaches the indoor heat exchanger 17, and heats it in the indoor heat exchanger 17 to heat the room. Then, the refrigerant passing through the indoor heat exchanger 17 reaches the expansion valve 18 through the strainer 17m, is expanded by the expansion valve 18, passes through the strainer 17n, and passes through the passage 1d and the ball valve ( 65A), passing through the filter drier 63 'and the passage 1c to the outdoor heat exchanger 14, and further comprising the first port 62a, the second port 62b of the four-way valve 62, the double tube heat exchanger. (67), the passage 1h is returned to the return port 12c of the accumulator 12. The returned refrigerant is stored in the accumulator 12 in a state separated into a liquid refrigerant and a gaseous refrigerant. At the time of heating, when it is lower than predetermined | prescribed temperature of the outdoor, the liquid flow volume adjustment valve 70 opens. As a result, the refrigerant in the passage 1d is also classified into the passage 1k through the liquid flow rate adjusting valve 70 so as to pass mainly through the passage 1k rather than the outdoor heat exchanger 14 side, and thus the double tube heat exchanger 67 and the passage. After 1h, it returns to the return port 12c of the accumulator 12.

And the description is added about the capacity | capacitance control valve 4 provided in the bypass passage 3. As shown in Fig. 2, the displacement control valve 4 includes a base 41 having a valve chamber 40, a movable valve rod 42 accommodated in the valve chamber 40, a valve drive unit 46, A cylindrical bellows 55 having a bellows structure is provided. The base 41 of the capacity control valve 4 is connected to the refrigerant discharge port 19 of the variable displacement compressor 13 to supply a refrigerant inlet 40a into which the refrigerant compressed by the compressor 13 flows, and the refrigerant accumulators. It has a refrigerant outlet 40b which flows out toward 12. As shown in FIG. The coolant inlet 40a and the coolant outlet 40b communicate with the valve chamber 40 of the base 41. The coolant inlet 40a is connected to the inlet pipe 70a, and the coolant outlet 40b is connected to the outlet pipe 70b. The inflow pipe 70a and the outflow pipe 70b are connected to the bypass passage 3.

As shown in Fig. 2, the valve drive section 46 is built in the motor housing section 47, the connecting section 48 connected to the motor housing section 47, and the motor housing section 47 to define the output shaft 49c. A drive motor 49 having a plurality, a plurality of gears 50 rotated at the output shaft 49c of the drive motor 49, a first rotatable drive shaft 51 rotatably driven by the gear 50, and a first Coaxially coupled to the drive shaft 51 has a rotatable second drive shaft 52 having a male screw portion 52c on its outer circumference. The male screw portion 52c of the second drive shaft 52 is screwed to the female screw portion 48c formed on the inner circumferential portion of the coupling portion 48 surrounding the second drive shaft 52. Moreover, the male screw part 52c and the female screw part 48c can function as a conversion mechanism which converts a rotational motion into a linear motion.

The valve rod 42 is held in the valve chamber 40 of the base 41 so as to be movable along the axial length direction of the valve rod 42. The valve rod 42 is formed of a first valve rod 42A having a small diameter and a second valve rod 42B having a large diameter, which are arranged in series and engaged with each other. 42 A of 1st valve rods are couple | bonded with the 2nd drive shaft 52 via the locking mechanism 53. As shown in FIG. The valve rod 42 may be displaced relative to the second drive shaft 52 along the axial length direction of the second drive shaft 52.

The diameter of the 1st valve rod 42A is large, and the diameter of the 2nd valve rod 42B is large. The opening / closing valve portion 42c is formed at the tip end of the second valve rod 42B of the valve rod 42. The valve portion 42c is opposed to the refrigerant inlet 40a.

The bellows 55 covers the outer circumferential surface 42f of the second valve rod 42B of the valve rod 42 and seals the refrigerant in the valve chamber 40 so as not to leak out of the valve chamber 40, and the shaft length direction And elastically deformable required in the radial direction. That is, the bellows 55 secures the mobility in the axial length direction (arrow F direction, arrow R direction) of the second valve rod 42B of the valve rod 42, while the refrigerant in the valve chamber 40 is connected to the valve chamber ( 40) to prevent leakage. Therefore, one end of the bellows 55 is held by the first valve rod 42A, and the other end of the bellows 55 is held by the base 41. In addition, the bellows 55 presses the valve rod 42 in the direction of the arrow R so that the valve portion 42d at the tip end of the valve rod 42 is opened apart from the inflow port 40a by its elastic force.

As shown in FIG. 2, the female threaded portion 56r of the nut member 56 is screwed to the male threaded portion 41r of the base 41. Therefore, the connection part 48 and the base 41 of the valve drive part 46 are detachably connected by the nut member 56. FIG. If the drive motor 49 is broken, even if the nut member 56 is rotated and removed from the base 41, the connection portion 48 of the valve drive portion 46 can be separated from the base 41, Only the valve driver 46 having the drive motor 49 can be replaced. Therefore, in the state where the base 41 having the valve chamber 40 in which the refrigerant is sealed is attached to the main circuit 1 of the air conditioning apparatus according to the present embodiment, the drive motor 49 can be replaced. You can get it.

According to the present embodiment, opening and closing of the capacity control valve 4 of the bypass passage 3 are controlled according to the air conditioning load of the main circuit 1 as described above. When the capacity control valve 4 is closed, the drive motor 49 rotates in one direction by a control system (not shown). Then, the drive shafts 51 and 52 rotate in one direction past the gear 50. Therefore, the second drive shaft 52 having the male screw portion 52c rotates with respect to the female screw portion 48c of the connecting portion 48. Accordingly, the rotational movement of the second drive shaft 52 is converted into the straight movement of the valve rod 42, and the valve rod 42 advances in the direction of the arrow F while tensioning the bellows 55, and as a result, the valve rod 42 Valve portion 42c is seated in the coolant inlet 40a. As a result, the capacity control valve 4 is closed to stop the refrigerant flow in the bypass passage 3.

In contrast, when the excess refrigerant compressed by the variable displacement compressor 13 is returned to the accumulator 12 without being supplied to the main circuit 1, a bypass operation is performed. In the bypass operation, the capacity control valve 4 is opened. In this manner, when the displacement control valve 4 is opened in the bypass operation, the drive motor 49 is driven to rotate in the reverse direction by the control system. Then, the drive shafts 51 and 52 rotate in the reverse direction beyond the gear 50. Therefore, the second drive shaft 52 having the male screw portion 52c rotates in the reverse direction with respect to the female screw portion 48c of the connecting portion 48, and the valve rod 42 retreats in the arrow R direction. As a result, the valve portion 42c of the valve rod 42 is spaced apart from the refrigerant inlet 40a, and the capacity control valve 4 is opened. For this reason, in the bypass operation, surplus refrigerant compressed by the variable displacement compressor 13 flows the bypass passage 3 from the refrigerant discharge port 19 of the compressor 13 in the direction of the arrow W1, and the capacity control valve 4 Flows from the coolant inlet 40a to the coolant outlet 40b, and passes through the bypass port 12b to return to the accumulator 12.

According to the present embodiment, the refrigerant outlet 40b formed in the base 41 of the displacement control valve 4 is the outer circumferential surface of the second valve rod 42B among the valve rods 42, as shown in FIG. (42h) is opposed. Specifically, as shown in Fig. 2, the central shaft center P1 of the coolant outlet 40b intersects with the central shaft center P2 of the valve rod 42 in an orthogonal state. On the other hand, the coolant inlet port 40a formed in the base 41 of the displacement control valve 4 directly faces the seating surface 42d of the valve portion 42c of the valve rod 42. Specifically, the center shaft center P3 of the refrigerant inlet 40a is along the center shaft center P2 of the valve rod 42. In other words, the extension line of the center axis center P3 of the refrigerant inlet 40a coincides with the center axis center P2 of the valve rod 42.

As described above, according to the present embodiment, as shown in FIG. 2, the refrigerant outlet 40b of the displacement control valve 4 faces the outer circumferential surface 42h of the second valve rod 42B of the valve rod 42. Doing. For this reason, the movement direction (arrow F direction, arrow R direction) of the valve rod 42 or the bellows 55 of the displacement control valve 4 has the refrigerant flow in the refrigerant outlet 40b of the displacement control valve 4. It is quite different from the direction (arrow W3 direction).

Therefore, according to the present embodiment, when the refrigerant in the bypass passage 3 flows through the capacity control valve 4 in the direction of arrow W1, the refrigerant is discharged from the refrigerant outlet 40b of the capacity control valve 4 in the direction of arrow W3. It is possible to suppress the possibility of the refrigerant to be displaced together the valve rod 42.

That is, it can suppress that the valve rod 42 follows a displacement in the refrigerant flow direction (arrow W3 direction) to the flow of the refrigerant discharged from the refrigerant outlet 40b. Therefore, according to the present embodiment, despite the opening of the displacement control valve 4, the problem that the valve rod 42 follows the displacement of the refrigerant flow and the displacement control valve 4 is temporarily closed are suppressed. . For this reason, according to this embodiment, unlike the prior art, the problem that an unnecessary load acts on the variable displacement compressor 13 at the time of a bypass operation can be suppressed.

In particular, even when the liquid type of the coolant in the bypass passage 3 is advanced and the incompressibility of the coolant is increased, the problem that the pressure of the coolant in the bypass passage 3 increases rapidly during the bypass operation can be suppressed. The problem that an unnecessary load acts on the compressor 13 can be suppressed. Therefore, even when starting the air conditioner after stopping for a long time, it is advantageous to suppress the above problems.

(Etc)

3 shows a sectional view of a displacement control valve 4D according to another embodiment. The dose control valve 4D according to the present embodiment is basically the same as that of the dose control valve 4 described above, and basically exhibits the same effect. Therefore, the air conditioner which concerns on a present Example is basically the same structure as the above air conditioner, and basically shows the same effect.

In the displacement control valve 4D shown in Fig. 3, the bellows 55D coaxially covers the outer circumferential surface 42f of the valve rod 42D. The coolant outlet 40b of the base 41 faces the outer circumferential surface 55f of the bellows 55D. Also in this embodiment, the center shaft center P1 of the coolant outlet 40b intersects with the center shaft center P2 of the valve rod 42D at a right angle, and the center shaft center P3 of the coolant inlet 40a is valved. The coolant outlet 40b and the coolant inlet 40a are provided in the base 41 so as to follow the center axis P2 of the rod 42D.

Also in this embodiment shown in Fig. 3, the refrigerant outlet 40b of the capacity control valve 4D faces the outer circumferential surface 55f of the bellows 55D and the outer circumferential surface 42f of the valve rod 42D. For this reason, the movement direction (arrow F direction, arrow R direction) of the valve rod 42D or the bellows 55D of the capacity control valve 4D is the refrigerant flow in the refrigerant outlet 40b of the capacity control valve 4D. It is quite different from the direction (arrow W3 direction). Therefore, when the refrigerant in the bypass passage 3 flows through the capacity control valve 4D, the refrigerant discharged in the direction of the arrow W3 from the refrigerant outlet 40b of the capacity control valve 4D flows in the bellows 55D and the valve. The problem of displacing the rods 42D together is suppressed. That is, the fear that the bellows 55D and the valve rod 42D follow the displacement of the refrigerant discharged from the refrigerant outlet 40b in the direction of the arrow W3 is suppressed. Therefore, even though the capacity control valve 4D is opened for bypass operation, the problem of the momentary closing of the capacity control valve 4D is suppressed.

In the above embodiment, the compressors 13 and 13B are provided, but only the variable displacement compressor 13 may be used. Compressors 13 and 13B are scroll compressors, but are not limited thereto. Although the above air conditioning apparatus performs both cooling and heating, only one of them may be necessary depending on the case. In addition, this invention is not limited only to the above-mentioned embodiment, It can change and implement suitably within the range which does not deviate from the summary.

As described above, according to the air conditioner according to the present invention, the refrigerant outlet is disposed opposite the outer circumferential surface of the valve rod or the outer circumferential surface of the bellows. For this reason, even if the capacity control valve is opened, the problem that the bellows and the valve rod follow the displacement of the refrigerant flow and the capacity control valve is closed is suppressed. Therefore, the problem that the refrigerant pressure in the bypass passage is sharply increased is suppressed, which can contribute to reducing unnecessary load acting on the compressor.

Claims (3)

An accumulator for accommodating a driving unit, a refrigerant for separating gas-type refrigerant and a liquid refrigerant, a compressor driven by the driving unit for sucking and compressing the gas-type refrigerant of the accumulator accompanying the driving, and a heat exchange of the compressed refrigerant A main circuit having a heat exchanger for the purpose of A bypass passage installed to connect the compressor and the accumulator to return excess refrigerant from the compressor to the accumulator; An air conditioner comprising: a displacement control valve installed in the bypass passage so as to be positioned between the compressor and the accumulator to control a volume of refrigerant flowing from the bypass passage to the accumulator, The capacity control valve, A base having a valve chamber having a refrigerant inlet through which the refrigerant in the bypass passage flows and a refrigerant outlet through which the refrigerant flows out toward the accumulator, and a movable valve having a valve portion movably held in the valve chamber of the base in the axial length direction. A valve rod for opening and closing the valve portion by moving the valve rod, a cylindrical bellows covering the outer circumferential surface of the valve rod and sealing the valve chamber, The coolant outlet is arranged to face an outer circumferential surface of the valve rod or an outer circumferential surface of the bellows. The coolant outlet and the coolant inlet port of claim 1, wherein the coolant outlet port and the coolant inlet port intersect the center axis of the valve bar while the center axis of the coolant inlet port is along the center axis of the valve bar. An air conditioning apparatus, which is provided at the base of the displacement control valve. The air conditioner according to claim 1, wherein the valve portion faces a refrigerant inlet.