JPH1194403A - Gas-liquid separator of refrigerating cycle device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent degradation of the lubricant through removal of water content mixed in the refrigerant by providing a water content removal layer filled with the desiccant to absorb the water contained in the refrigerant in a part of an area in a gas-liquid separator. SOLUTION: A gas component outlet 31 is formed on an upper end, and a liquid component outlet 32 is formed on a lower end of a slender cylindrical body 30 of a gas-liquid separator 21. The body 30 is provided with a refrigerant introduction pipe 33 on its center part in the longitudinal direction, its refrigerant introduction pipe 33 and the liquid component outlet 32 are connected to a communication piping 19, and a gas component outlet 31 is connected to a gas injection pipe 25. A water content removal layer 34 filled with the desiccant 41 to absorb the water contained in the refrigerant is formed in an area upward of a refrigerant introduction pipe 33, and an area downward of the refrigerant introduction pipe 33 is a gas-liquid separation area 35. Degradation of the lubricant can be prevented by removing water mixed in the refrigerant.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas-liquid separator of a refrigeration cycle apparatus in which a gas component is injected into a compressor according to an operation state.

[0002]

2. Description of the Related Art As a conventional refrigeration cycle apparatus, from the viewpoint of enhancing the capacity of a compressor, for example, an actual compressor 1-58 is used.
As disclosed in Japanese Patent No. 046, a refrigeration cycle apparatus has been proposed in which the capacity of a compressor is improved by gas injection. On the other hand, in recent years, adoption of an HFC-based refrigerant as a refrigerant used in a refrigeration cycle device has been studied in consideration of prevention of environmental destruction and the like. And
When employing this HFC-based refrigerant, it is desirable to use an ester-based oil compatible with the HFC-based refrigerant as a lubricating oil.

[0003]

However, in a refrigeration cycle apparatus having a gas injection function, it is necessary to add a gas-liquid separator, an injection pipe, and the like during the refrigeration cycle. On the other hand, the ester-based oil used when using the HFC-based refrigerant has a problem that it is hydrolyzed and deteriorated due to the inclusion of moisture. Therefore, in order to prevent the ester-based refrigerant from deteriorating due to moisture, it is necessary to provide a device for removing moisture, such as a dryer, during the refrigeration cycle. As described above, in a refrigeration cycle apparatus using an HFC-based refrigerant as a refrigerant and having a gas injection function, compared to a normal refrigeration cycle apparatus, at least a gas-liquid separator, a gas injection pipe, a dryer apparatus, and the like. Need to be added. However, the addition of such a device inevitably goes against the recent demand for downsizing of the air conditioner. In particular, in a home air conditioner generally called a room air conditioner, there is a strong demand for a reduction in the number of parts and a reduction in the size of the device accompanying the reduction in the number of parts.

Accordingly, an object of the present invention is to provide a separate dryer device for drying a refrigerant required when an HFC-based refrigerant is used as a refrigerant for a refrigeration cycle device that includes a gas-liquid separator and performs gas injection. It is an object of the present invention to provide a gas-liquid separator of a refrigeration cycle device capable of performing this without using a gas-liquid separator.

[0005]

The gas-liquid separator of the refrigeration cycle apparatus according to the present invention according to the first aspect of the present invention has the following features.
In a gas-liquid separator of a refrigeration cycle device for separating a gas component injected into a compressor, a moisture removal layer in which a partial area in the gas-liquid separator is filled with a desiccant that absorbs moisture contained in a refrigerant. Is provided. 3. The gas-liquid separator of a refrigeration cycle apparatus according to claim 2, wherein the main body extends vertically, a gas component outlet formed at an upper end of the main body, and a liquid component formed at a lower end of the main body. An outlet, a refrigerant introduction pipe for introducing a refrigerant into the main body, and a moisture removal layer filled with a desiccant, wherein the moisture removal layer is provided between the gas component exit and the opening of the refrigerant introduction pipe. It is characterized by having been provided. According to a third aspect of the present invention, in the gas-liquid separator of the refrigeration cycle apparatus according to the second aspect, the refrigerant introduction pipe is inserted from a lower end of the main body. And
According to a fourth aspect of the present invention, in the gas-liquid separator of the refrigeration cycle device according to the third aspect, the opening position of the refrigerant introduction pipe is set to be smaller than the opening position of the liquid component outlet. It is also characterized by being raised. Claim 5
The gas-liquid separator of the refrigeration cycle device of the present invention described above, a main body extending in the vertical direction, a gas component outlet formed at the upper end of the main body, and a liquid component outlet formed at the lower end of the main body, A coolant introduction pipe for introducing a coolant into the main body, and a moisture removal layer filled with a desiccant, wherein the moisture removal layer is provided between the coolant introduction pipe and the liquid component outlet. And According to a sixth aspect of the present invention, there is provided the gas-liquid separator of the refrigeration cycle apparatus according to the second or fifth aspect, wherein the refrigerant introduction pipe is inserted from an intermediate portion of the main body. An opening of the refrigerant introduction pipe is directed to an inner surface of a side wall of the main body. A gas-liquid separator for a refrigeration cycle device according to the present invention according to claim 7 is the gas-liquid separator for a refrigeration cycle device according to claim 2 or 5, wherein an opening of the refrigerant introduction pipe is provided in the water removal layer. It is characterized by aiming. The gas-liquid separator of the refrigeration cycle apparatus of the present invention according to claim 8 is the fifth embodiment.
In the gas-liquid separator of the refrigeration cycle apparatus described in the above, the refrigerant introduction pipe is inserted from the upper end of the main body. The gas-liquid separator of the refrigeration cycle device according to the ninth aspect of the present invention is the gas-liquid separator of the refrigeration cycle device of the eighth aspect, wherein the opening position of the refrigerant introduction pipe is set to be smaller than the opening position of the gas component outlet. It is also characterized by being lowered.
According to a tenth aspect of the present invention, in the gas-liquid separator of the refrigeration cycle apparatus according to any one of the first to ninth aspects, an HFC-based refrigerant is used as a refrigerant. It is characterized by.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A gas-liquid separator according to a first embodiment of the present invention utilizes a part of a gas-liquid separator essential as an element of a refrigeration cycle for performing gas injection, and uses a desiccant. There is no need to provide a separate dryer since the moisture removal layer filled with is provided. Therefore, HF
When the C-based refrigerant is employed, the deterioration of the ester-based oil compatible with the C-based refrigerant can be achieved without increasing the number of parts of the apparatus. Furthermore, since the gas-liquid separator can be expected to perform gas-liquid separation by the baffle action of the desiccant, the gas-liquid separator has the effect of improving its original function.

In the gas-liquid separator according to the second embodiment of the present invention, a moisture removing layer is provided between a gas component outlet and an opening of a refrigerant introduction pipe. As described above, a part of the gas-liquid separator, which is indispensable as an element of the refrigeration cycle for performing gas injection, is used to provide the moisture removal layer filled with the desiccant, so that it is necessary to separately provide a dryer. Absent. Therefore, when the HFC-based refrigerant is employed, the deterioration of the ester-based oil compatible with the HFC-based refrigerant can be achieved without increasing the number of parts of the apparatus. Furthermore, since the moisture removal layer is provided between the gas component outlet and the opening of the refrigerant introduction pipe, the rectification effect of the moisture removal layer further promotes gas separation and reduces pulsation of gas injection. Can be.

[0008] A third embodiment of the present invention is the same as the second embodiment, except that a refrigerant inlet pipe is inserted from the lower end of the main body. Therefore, the piping connected to the liquid component outlet and the refrigerant introduction pipe are provided adjacent to each other in the same direction in the lower part of the main body, so that the number of processing steps can be reduced.

A fourth embodiment of the present invention is the same as the third embodiment, except that the opening position of the refrigerant introduction pipe is higher than the opening position of the liquid component outlet. By setting the opening position of the refrigerant introduction pipe high as described above, it is possible to prevent the liquid component from being disturbed due to the introduction of the refrigerant.

In the gas-liquid separator according to a fifth embodiment of the present invention, a water removal layer is provided between a refrigerant introduction pipe and a liquid component outlet. As described above, a part of the gas-liquid separator, which is indispensable as an element of the refrigeration cycle for performing gas injection, is used to provide the moisture removal layer filled with the desiccant, so that it is necessary to separately provide a dryer. Absent. Therefore, when the HFC-based refrigerant is employed, the deterioration of the ester-based oil compatible with the HFC-based refrigerant can be achieved without increasing the number of parts of the apparatus. Further, since the water removal layer is provided between the refrigerant introduction pipe and the liquid component outlet, the refrigerant passes through the water removal layer in the state of the liquid component, and the refrigerant retains water even in the normal operation state in which gas injection is not performed. It can pass through the removal layer and increase the water absorption capacity.

According to a sixth embodiment of the present invention, in the gas-liquid separator of the refrigeration cycle apparatus according to the second or fifth embodiment, a refrigerant introduction pipe is inserted from an intermediate portion of the main body,
The opening of the refrigerant introduction pipe faces the inner surface of the side wall of the main body. By directing the opening of the refrigerant introduction pipe toward the inner surface of the side wall of the main body, the introduced refrigerant collides with the inner surface of the side wall, so that the separation of the liquid component and the gas component is further promoted. Therefore, the gas-liquid separation function can be enhanced.

A seventh embodiment of the present invention is the same as the second or fifth embodiment, except that the opening of the refrigerant introduction pipe is directed to the moisture removing layer. By directing the opening of the refrigerant introduction pipe toward the moisture removal layer in this manner, the liquid component existing in the gas-liquid separation region is not disturbed. Therefore, the gas-liquid separation function can be enhanced.

An eighth embodiment of the present invention is the same as the fifth embodiment, except that the refrigerant introduction pipe is inserted from the upper end of the main body. Therefore, the pipe connected to the gas component outlet and the refrigerant introduction pipe are provided adjacent to each other in the same direction in the upper part of the main body, so that the number of processing steps can be reduced.

In a ninth embodiment of the present invention, the opening position of the refrigerant introduction pipe is lower than the opening position of the gas component outlet in the eighth embodiment. By setting the opening position of the refrigerant introduction pipe low as described above, it is possible to prevent the refrigerant that has not been sufficiently gas-liquid separated from flowing out from the gas component outlet.

In a tenth embodiment of the present invention, an HFC-based refrigerant is used as the refrigerant in the first to ninth embodiments. When an HFC-based refrigerant is used as the refrigerant, a function of removing moisture is particularly required, so that the effect of providing the moisture removal layer as described above is high.

[0016]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram of an air conditioner as an example of a refrigeration cycle device according to the present invention, and FIG. 2 is an enlarged vertical sectional view of a gas-liquid separator incorporated in the air conditioner. The air conditioner 1 is generally composed of an indoor unit 2
And an outdoor unit 3, and first and second connection pipes 4 and 5 for connecting between them. The indoor unit 2 includes an indoor heat exchanger 6 serving as an evaporator or a condenser, and internal pipes 7 and 8 connected to the entrance and exit of the indoor heat exchanger 6, respectively. On the other hand, the first and second
One end of each of the connection pipes 4 and 5 is detachably connected. In the figure, reference numeral 9 denotes an indoor blower, and the indoor blower 9 is attached to an outlet (not shown) of the indoor unit 2.

The outdoor unit 3 includes an outdoor heat exchanger 10 which serves as a condenser or an evaporator, and first and second heat exchangers 10 connected to the entrance and exit, respectively.
A first internal pipe 1 having second internal pipes 11 and 12;
1 is detachably connected to the other end of the first connection pipe 4 described above, and the second internal pipe 12 is detachably connected to the other end of the second connection pipe 5 described above. . In the figure,
Reference numeral 13 denotes an electric fan arranged adjacent to the outdoor heat exchanger 10. A bridge circuit 14 is interposed in the first internal pipe 11, the bridge circuit 14 has first to fourth four check valves 15 to 18, and a communication pipe 19 has a first check valve 15 to 18. The main expansion valve 20 and the gas-liquid separator 21 as a pressure reducing mechanism are mounted. The first internal pipe 11 has a bridge circuit 14 and the outdoor heat exchanger 1.
0, a capillary tube 22 as a second decompression mechanism is interposed.

On the other hand, the compressor 23
And a four-way valve 24 are provided. Switching between the cooling and heating is performed by switching the four-way valve 24. In the drawing, the direction of the arrow indicated by the solid line indicates the flow direction of the refrigerant in the heating operation mode, and the direction of the arrow indicated by the broken line indicates the flow direction of the refrigerant in the cooling operation mode. The compressor 23 has an injection port 23c independent of its original suction port 23a or discharge port 23b, and the injection port 23c is provided with an electromagnetic on-off valve 26.
Is connected to the gas-liquid separator 21 via a gas injection pipe 25 provided with Here, in this air conditioner 1, an HFC-based refrigerant is employed as a refrigerant, and a polyol ester oil is employed as a lubricating oil.

In the four-way valve 24 shown in FIG. 1, the mode in the cooling operation mode is shown by a broken line, and the mode in the heating operation mode is shown by a solid line. In the cooling operation mode,
After leaving the outdoor heat exchanger 10 and entering the first internal pipe 11, the refrigerant passes through the first check valve 15 of the bridge circuit 14, passes through the main expansion valve 20, passes through the gas-liquid separator 21, 2
Pass through the check valve 16 to the indoor unit 2 side. On the other hand, in the heating operation mode, the refrigerant that has entered the outdoor unit 3 from the indoor unit 2 through the first connection pipe 4 passes through the third check valve 17 of the bridge circuit 14 and passes through the main expansion valve 20. After passing through the gas-liquid separator 21 through the fourth check valve 18, the flow proceeds through the capillary tube 22 and enters the outdoor heat exchanger 10. During the heating operation, when a particularly large capacity is required, the on-off valve 26 is opened to open the gas injection pipe 25, and the gas injection pipe 2 is opened.
Through 5, the gas component separated by the gas-liquid separator 21 is injected into the compressor 23. Thereby, the capacity of the compressor 23 is increased.

As shown in FIG. 2, the gas-liquid separator 21 has a relatively elongated cylindrical main body 30 extending vertically. The main body 30 has a gas component outlet 31 at an upper end and a liquid component outlet 32 at a lower end. The main body 30
Has a refrigerant introduction pipe 33 at the center in the longitudinal direction.
The refrigerant introduction pipe 33 and the liquid component outlet 32 are connected to the communication pipe 19 described above. The opening 33 a of the refrigerant introduction pipe 33 faces the side wall of the main body 30. That is,
The coolant is supplied to the main body 3 through the opening 33 a of the coolant introduction pipe 33.
It is discharged toward the 0 side wall. On the other hand, the gas component outlet 31
Is connected to the gas injection pipe 25 described above.

A water removal layer 34 is formed inside the main body 30 in a region above the refrigerant introduction pipe 33.
The region below 3 is a gas-liquid separation region 35. That is, in the main body 30, a pair of partition plates 36 and 37 are provided in a region above the refrigerant introduction pipe 33 and vertically separated from each other, and these partition plates 36 and 37 are respectively formed by caulking or the like. 30. As shown in FIG. 3, a large number of communication holes 38 are formed in the partition plates 36 and 37. A spring 39 is placed on the lower first partition plate 36.
The holding plate 40 is attached via
Similarly to the partition plates 36 and 37, a large number of communication holes (not shown) are formed in the. The space sandwiched between the pressing plate 40 and the upper second partition plate 37 is filled with the desiccant 41, and the above-described elements form the moisture removal layer 34. As the desiccant 41, a desiccant having relatively large particles such as molecular sieve having a capability of absorbing moisture is preferably used. Such a desiccant 41 is held in the main body 30 by a spring-biased holding plate 40.

The flow of the refrigerant in the gas-liquid separator 21 will be described in the case of the gas injection operation in the heating operation mode. The gas-liquid two-phase refrigerant that has passed through the main expansion valve 20 is introduced into the gas-liquid separator 21 through the refrigerant introduction pipe 33. At this time, the separation between the liquid component and the gas component is promoted by the collision with the inner wall surface of the main body 30 and the aggregation of the liquid particles in the gas-liquid separation region 35. The liquid component of the refrigerant after the gas-liquid separation flows out of the gas-liquid separator 21 through the liquid component outlet 32. On the other hand, the gas component passes through the desiccant 41, and after the water mixed in the gas component is removed, the gas-liquid separator 21 passes through the gas component outlet 31.
Spill out of. This refrigerant gas enters the compressor 23 from the injection port 23c. As described above, the refrigerant can be dried using the gas injection operation mode. In addition, the gas separation is further promoted by the rectifying action by passing through the desiccant 41 disposed near the gas component outlet 31, and the pulsation of gas injection is reduced. As described above, the gas-liquid separator 21 not only promotes gas-liquid separation, which is its original function, but also performs drying of gas components by the desiccant 41. Liquid separation and HFC
Removal of water mixed in the system refrigerant can be performed together, and space saving can be achieved as compared with a case where these two functions are configured by separate devices.

FIGS. 4 to 8 are enlarged vertical sectional views of gas-liquid separators according to second to sixth embodiments of the present invention. In the description of these other embodiments, the same elements as those in the above-described first embodiment will be denoted by the same reference numerals, and the description thereof will be omitted. Hereinafter, each characteristic portion of these other embodiments will be described. explain.

FIG. 4 shows a second embodiment according to the present invention. In the second embodiment, a refrigerant introduction pipe 33 is provided.
Opening 33a is bent upward and the opening 33a
a is open to the moisture removal layer 34. According to the second embodiment configured as described above, in the main body 30 of the gas-liquid separator 21, the refrigerant is introduced from the refrigerant introduction pipe 33 so as to avoid the gas-liquid separation region 35 where the liquid component of the refrigerant exists. Therefore, it is possible to prevent the liquid component from being disturbed due to the introduction of the refrigerant.
The original gas-liquid separation performance can be improved.

FIG. 5 shows a third embodiment according to the present invention. In this third embodiment, a refrigerant introduction pipe 33 is provided.
Is disposed at the lower end of the main body 30 adjacent to the liquid component outlet 32, the refrigerant introduction pipe 33 extends straight upward along the axis of the main body 30, and its opening 33 a faces the water removal area 34. It is open. In addition, the refrigerant introduction pipe 3
The third opening 33 a is provided at a position higher than the opening position of the liquid component outlet 32. According to the second embodiment configured as described above, the number of processing steps can be reduced by providing the communication pipe 19 for allowing the liquid component of the refrigerant to flow out and the refrigerant introduction pipe 33 adjacent to each other in the same direction. Further, by providing the opening 33a of the refrigerant introduction pipe 33 at a position higher than the opening position of the liquid component outlet 32, it is possible to prevent disturbance of the liquid component due to introduction of the refrigerant.

FIG. 6 shows a fourth embodiment according to the present invention. In the fourth embodiment, a water removing layer 34 is provided in a region below the main body 30, that is, in a region adjacent to the liquid component outlet 32. It is arranged. In the fourth embodiment,
Since the desiccant 41 is present in the liquid component in the gas-liquid separator 21, the desiccant 41 can make maximum use of its water absorbing ability. In addition, even during the normal operation without gas injection, the refrigerant always passes through the water removal layer 34, so that the water removal effect is high.

FIG. 7 shows a fifth embodiment according to the present invention. In the fifth embodiment, the fourth embodiment shown in FIG.
As in the embodiment, the desiccant 41 is disposed in a lower region of the main body 30, that is, in a region adjacent to the liquid component outlet 32.
Further, the opening 33 a of the refrigerant introduction pipe 33 arranged at the central portion in the longitudinal direction of the main body 30 is bent downward and opened toward the moisture removal layer 34. In the fifth embodiment, the refrigerant introduced into the main body is directly transferred to the partition plate 3.
6. Collision of the liquid component is promoted by colliding with the holding plate 40 and the desiccant 41, thereby improving the gas-liquid separation performance.

FIG. 8 shows a sixth embodiment according to the present invention. In the sixth embodiment, the fourth embodiment shown in FIG.
As in the embodiment, the desiccant 41 is disposed in a lower region of the main body 30, that is, in a region adjacent to the liquid component outlet 32.
Further, a refrigerant introduction pipe 33 is arranged at the upper end of the main body 30 adjacent to the gas component outlet 31, and the refrigerant introduction pipe 33 extends straight downward along the axis of the main body 30, and its opening 33a is dried. It is opened downward toward the agent 41. The opening 33a of the refrigerant introduction pipe 33 is provided at a position lower than the opening position of the gas component outlet 31. According to the sixth embodiment having such a configuration, the number of processing steps can be reduced by providing the connecting pipe 19 for allowing the gas component of the refrigerant to flow out and the refrigerant introducing pipe 33 adjacent to each other in the same direction. Further, the opening 33a of the refrigerant introduction pipe 33 is connected to the gas component outlet 31.
By disposing the refrigerant at a position lower than the opening position, it is possible to prevent the refrigerant having insufficient gas-liquid separation from being discharged from the gas component outlet.

[0029]

As described above, according to the present invention, in a refrigeration cycle device having a gas injection function, a part of the internal space of a gas-liquid separator attached to the device is used as a desiccant storage space. Therefore, it is possible to prevent the deterioration of the lubricant by removing water mixed in the HFC-based refrigerant without increasing the space occupied by the device, and to promote the gas-liquid separation by the rectifying action of the desiccant. Can be.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of an air conditioner as an embodiment according to the present invention.

FIG. 2 is an enlarged vertical sectional view of the gas-liquid separator of the first embodiment applied to the air conditioner according to the present invention.

FIG. 3 is a sectional view taken along the line III-III in FIG. 2;

FIG. 4 is an enlarged vertical sectional view of a gas-liquid separator according to a second embodiment.

FIG. 5 is an enlarged longitudinal sectional view of a gas-liquid separator of a third embodiment.

FIG. 6 is an enlarged vertical sectional view of a gas-liquid separator of a fourth embodiment.

FIG. 7 is an enlarged vertical sectional view of a gas-liquid separator according to a fifth embodiment.

FIG. 8 is an enlarged vertical sectional view of a gas-liquid separator of a sixth embodiment.

[Description of Signs] 1 Air conditioner 6 Indoor heat exchanger 10 Outdoor heat exchanger 19 Communication pipe 20 Main expansion valve 21 Gas-liquid separator 22 Capillary tube 23 Compressor 25 Gas injection pipe 30 Main body of gas-liquid separator 31 gas component outlet 32 liquid component outlet 33 refrigerant introduction pipe 34 moisture removal layer 41 desiccant

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yuichi Yakumaru 1006 Kazuma Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd.

Claims (10)

[Claims] 1. A gas-liquid separator of a refrigeration cycle device for separating a gas component to be injected into a compressor according to an operation state.
A gas-liquid separator for a refrigeration cycle device, comprising a moisture removal layer filled with a desiccant that absorbs moisture contained in a refrigerant. 2. A main body extending vertically, a gas component outlet formed at an upper end of the main body, a liquid component outlet formed at a lower end of the main body, and a refrigerant introduction for introducing a refrigerant into the main body. Gas and liquid for a refrigeration cycle device, comprising: a pipe; and a moisture removal layer filled with a desiccant, wherein the moisture removal layer is provided between the gas component outlet and the opening of the refrigerant introduction pipe. Separator. 3. The gas-liquid separator of a refrigeration cycle apparatus according to claim 2, wherein the refrigerant introduction pipe is inserted from a lower end of the main body. 4. The gas-liquid separator of a refrigeration cycle apparatus according to claim 3, wherein an opening position of the refrigerant introduction pipe is higher than an opening position of the liquid component outlet. 5. A main body extending vertically, a gas component outlet formed at an upper end of the main body, a liquid component outlet formed at a lower end of the main body, and a refrigerant introduction for introducing a refrigerant into the main body. A gas-liquid separator for a refrigeration cycle device, comprising: a pipe; and a moisture removal layer filled with a desiccant, wherein the moisture removal layer is provided between the refrigerant introduction pipe and the liquid component outlet. . 6. The refrigerant introduction pipe is inserted from an intermediate portion of the main body, and an opening of the refrigerant introduction pipe is directed to an inner surface of a side wall of the main body.
A gas-liquid separator for a refrigeration cycle apparatus according to claim 1. 7. The gas-liquid separator of a refrigeration cycle apparatus according to claim 2, wherein an opening of the refrigerant introduction pipe is directed to the moisture removal layer. 8. The gas-liquid separator of a refrigeration cycle apparatus according to claim 5, wherein the refrigerant introduction pipe is inserted from an upper end of the main body. 9. The gas-liquid separator of a refrigeration cycle apparatus according to claim 8, wherein an opening position of the refrigerant introduction pipe is lower than an opening position of the gas component outlet. 10. The gas-liquid separator of a refrigeration cycle apparatus according to claim 1, wherein an HFC-based refrigerant is used as the refrigerant.