Air conditioning system

Abstract

To provide an air conditioning system that can suppress filter clogging and prevent performance degradation. [Solution] The air conditioning system includes a gas-liquid separator. The gas-liquid separator includes a sealed container 40, an intake-side pipe 41 having a discharge port 41a for drawing refrigerant into the sealed container 40 and discharging it along the inner surface of the sealed container 40, a discharge-side pipe 42 having an intake port 42a for drawing in gaseous refrigerant separated in the sealed container 40 and a return hole 42b for drawing in liquid refrigerant, and for discharging refrigerant to the outside of the sealed container 40, an adsorption means extending from the bottom of the sealed container 40 to the height of the discharge port 41a on the inner surface of the sealed container 40 for adsorbing foreign matter in the refrigerant, and a filter 43 provided to block the return hole 42b of the discharge-side pipe 42.

Description

Technical Field

[0001] The present invention relates to an air conditioner provided with a gas-liquid separator.

Background Art

[0002] When replacing an air conditioner or a compressor due to a failure, foreign matter remains in the piping connecting the indoor unit and the outdoor unit. If this foreign matter enters the compressor after replacement, the compressor may fail again. Therefore, when replacing an air conditioner or a compressor, it is essential to clean the existing connection piping to remove foreign matter, or to install a filter for collecting foreign matter if foreign matter removal by cleaning is not performed.

[0003] Conventionally, as a technique for collecting metal foreign matter so that it does not enter the compressor, a gas-liquid separator (accumulator) installed on the refrigerant suction side of the compressor includes a filter and a permanent magnet provided on the filter, and a technique for efficiently collecting metal foreign matter with the filter to which magnetic force is applied is known (for example, see Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] / / 原文此处无具体内容,翻译时保留标签占位符 / / 原文此处无具体内容,翻译时保留标签占位符 However, in the above conventional technology, when the compressor fails, the amount of foreign matter increases and its size also becomes large. Therefore, the filter is likely to be clogged, and when clogged, it becomes a resistance to the flow of the refrigerant, leading to a decrease in performance. / / 原文此处无具体内容,翻译时保留标签占位符

Means for Solving the Problems

[0006] / / 原文此处无具体内容,翻译时保留标签占位符 / / 原文此处无具体内容,翻译时保留标签占位符 In view of the above problems, the present invention is an air conditioner provided with a gas-liquid separator, The gas-liquid separator, A sealed container, A suction-side piping having a discharge port that draws refrigerant into a sealed container and discharges it along the inner surface of the sealed container, It has an intake port for drawing in gaseous refrigerant separated within a sealed container and a hole for drawing in liquid refrigerant, and a discharge side pipe for discharging refrigerant to the outside of the sealed container, An adsorption means is provided on the inner surface of the sealed container, extending from the bottom of the sealed container to the height of the discharge port, for adsorbing foreign matter in the refrigerant. A filter is installed to block the hole in the discharge side piping and An air conditioning system is provided, including the following: [Effects of the Invention]

[0007] According to the present invention, filter clogging can be suppressed and performance degradation can be prevented. [Brief explanation of the drawing]

[0008] [Figure 1] A diagram showing an example of the configuration of an air conditioning system. [Figure 2] A diagram showing a first example configuration of a gas-liquid separator included in an air conditioning system. [Figure 3] A diagram showing the installation location of the filter. [Figure 4] A diagram showing a second example configuration of a gas-liquid separator. [Modes for carrying out the invention]

[0009] Figure 1 shows an example of the configuration of an air conditioning system. The air conditioning system 10 includes an indoor unit 11 installed in the space (indoors) where air conditioning is performed, an outdoor unit 12 installed outside, and a controller operated by the user. The air conditioning system 10 performs air conditioning by circulating a refrigerant between the indoor unit 11 and the outdoor unit 12 and exchanging heat with the indoor air, which is the fluid to be cooled or heated. For this reason, the indoor unit 11 and the outdoor unit 12 are connected by two refrigerant pipes for circulating the refrigerant.

[0010] The indoor unit 11 and the outdoor unit 12 may each consist of two or more units, and two or more indoor units 11 may be connected to one outdoor unit 12. Hydrofluorocarbons (HFCs) and hydrofluoroolefins (HFOs) can be used as refrigerants. Examples of HFCs include R410A and R32. Examples of HFOs include R1234yf.

[0011] The indoor unit 11 communicates with the controller and receives various signals such as operation commands, stop commands, commands to change the set temperature, and commands to change the operating mode. The indoor unit 11 and the controller may be connected by a cable and communicate via wire, or they may communicate wirelessly using infrared or the like. The indoor unit 11 is connected to the outdoor unit 12 via a communication line and works in cooperation with the outdoor unit 12 to provide indoor air conditioning.

[0012] The indoor unit 11 receives an operation command from the controller and starts up, instructing the outdoor unit 12 to start up. After starting up, the outdoor unit 12 adjusts the compressor rotation speed, the opening of the outdoor expansion valve, etc., and controls the amount of refrigerant circulated, etc., so that the indoor temperature reaches the set temperature.

[0013] The indoor unit 11 comprises an indoor heat exchanger 20, an indoor fan 21, and an indoor fan motor 22 as a power source. The indoor fan 21 is driven by the indoor fan motor 22 and takes in indoor air, which is sent to the indoor heat exchanger 20. The indoor heat exchanger 20 has heat transfer tubes through which a refrigerant flows, and is configured so that the incoming air comes into contact with the surface of the heat transfer tubes to perform heat exchange. The air that has undergone heat exchange by the indoor heat exchanger 20 is discharged into the room.

[0014] The indoor unit 11 may also be equipped with various sensors for measuring indoor temperature, an indoor expansion valve, and the like.

[0015] The outdoor unit 12 includes a compressor 30, an accumulator 31 as a gas-liquid separator, a four-way valve 32, an outdoor expansion valve 33, an outdoor heat exchanger 34, an outdoor fan 35, and an outdoor fan motor 36 as a power device. The compressor 30 is driven by a compressor motor, compresses low-pressure gas refrigerant, and discharges it as high-pressure gas refrigerant. The accumulator 31 separates gas and liquid so that no liquid enters the compressor 30.

[0016] The four-way valve 32 is a valve that switches the refrigerant flow path according to the operating state (operation mode) of the air conditioner 10. The operation modes include a cooling mode, a heating mode, a ventilation mode, etc. The outdoor expansion valve 33 is a valve that expands high-pressure refrigerant and adjusts the pressure and flow rate of the refrigerant. The outdoor fan 35 is driven by the outdoor fan motor 36, takes in outdoor air, and sends it to the outdoor heat exchanger 34. The outdoor heat exchanger 34, similar to the indoor heat exchanger 20, has heat transfer tubes through which refrigerant flows inside, and is configured such that the incoming air contacts the surface of the heat transfer tubes to perform heat exchange. The air heat-exchanged by the outdoor heat exchanger 34 is discharged outdoors.

[0017] The outdoor unit 12 further includes a control device 37. The control device 37 is connected to the compressor 30, the four-way valve 32, the outdoor expansion valve 33, the indoor fan motor 22, and the outdoor fan motor 36, and controls these components. Specifically, it controls the rotation speed of the compressor motor, the opening degree of the outdoor expansion valve 33, the rotation speeds of the indoor fan motor 22 and the outdoor fan motor 36, etc. To control these, various sensors are also attached to the outdoor unit 12. The control device 37 performs these controls based on the information detected by the various sensors. Note that the control device 37 is not limited to the outdoor unit 12, and may be provided in the indoor unit 11, or the function may be divided into two and provided in each of the indoor unit 11 and the outdoor unit 12, or it may not be mounted inside the indoor unit 11 or the outdoor unit 12, but may be arranged as a separate device at a location different from the indoor unit 11 and the outdoor unit 12.

[0018] During the cooling operation, the indoor heat exchanger 20 is used as an evaporator, and the outdoor heat exchanger 34 is used as a condenser. Therefore, as shown by the arrows, the control device 37 circulates the refrigerant enclosed in the system in the order of the compressor 30, the four-way valve 32, the outdoor heat exchanger 34, the outdoor expansion valve 33, the indoor heat exchanger 20, the four-way valve 32, the accumulator 31, and the compressor 30.

[0019] The compressor 30 compresses the refrigerant in a low-temperature and low-pressure gaseous state (refrigerant gas) and discharges it as a high-temperature and high-pressure refrigerant gas. The outdoor heat exchanger 34 exchanges heat with the outdoor air and cools and condenses the refrigerant gas. The outdoor expansion valve 33 expands the refrigerant, adjusts the pressure of the refrigerant flowing into the evaporator, and also adjusts the flow rate of the refrigerant to keep the superheat degree at the outlet of the evaporator constant. The superheat degree indicates how many degrees higher than the saturation temperature and is an index indicating the degree of superheat.

[0020] The indoor heat exchanger 20 exchanges heat with the indoor air and returns the refrigerant gas heated to the above-mentioned superheat degree to the outdoor unit 12. The refrigerant gas returned from the indoor heat exchanger 20 is sent to the accumulator 31 through the four-way valve 32 and then returned to the compressor 30.

[0021] During the heating operation, contrary to the cooling operation, the indoor heat exchanger 20 is used as a condenser, the outdoor heat exchanger 34 is used as an evaporator, and the refrigerant enclosed in the system is circulated in the order of the compressor 30, the four-way valve 32, the indoor heat exchanger 20, the outdoor expansion valve 33, the outdoor heat exchanger 34, the four-way valve 32, the accumulator 31, and the compressor 30.

[0022] For the compressor 30, a high-efficiency, low-vibration, and low-noise rotary compressor, scroll compressor, etc. are used.

[0023] By the way, the compressor 30 may fail due to long-term use or suction of foreign matter, etc., and the indoor expansion valve, the four-way valve 32, and the outdoor expansion valve 33 may fail due to clogging of foreign matter, etc. When such major components and machines fail, it is necessary to replace them with new components and machines.

[0024] When replacing the air conditioning unit 10, the outdoor unit 12, or the compressor 30, foreign matter remains in the piping connecting the indoor unit 11 and the outdoor unit 12. This foreign matter includes iron filings, metal shavings, dust, and debris. Iron filings and metal shavings are metallic foreign matter generated from the sliding parts of the compressor 30 due to deterioration of the lubricating oil, while dust and debris are non-metallic foreign matter. In particular, if metallic foreign matter enters the compressor 30 after replacement, it may cause seizing in the sliding parts, potentially leading to another compressor failure.

[0025] Therefore, if a compressor 30 or similar unit malfunctions and needs to be replaced with a new one, the existing piping can be cleaned to remove foreign matter. However, cleaning existing piping is a time-consuming and labor-intensive process. Therefore, a filter can be installed in the liquid refrigerant piping to remove foreign matter from the existing piping. This shortens the time required to replace the compressor 30 or similar unit.

[0026] The compressor 30 is connected to the piping via an accumulator 31. Therefore, a filter for removing foreign matter can be installed inside the accumulator 31, as described in Patent Document 1 above. However, when the compressor 30 or other components malfunction, the amount and size of foreign matter increase, so even if a filter is installed, it will quickly become clogged, which will create resistance to the refrigerant flow and lead to a decrease in performance.

[0027] Therefore, we provide an air conditioning system equipped with an accumulator 31 that can suppress filter clogging and prevent performance degradation.

[0028] Figure 2 shows a first example configuration of a gas-liquid separator (accumulator 31) provided in an air conditioning system. Figure 2(a) is a top view of the accumulator 31 as seen from above, and Figure 2(b) is a side view of the accumulator 31 as seen from the side.

[0029] The accumulator 31 includes a hollow sealed container 40. An intake pipe 41 for drawing refrigerant into the sealed container 40 and a discharge pipe 42 for discharging the refrigerant from the sealed container 40 to the outside are provided so as to penetrate the sealed container 40.

[0030] The accumulator 31 has a predetermined volume and, when the refrigerant being drawn in consists of two phases, separates the refrigerant into a gaseous component (gaseous refrigerant, i.e., gaseous refrigerant) and a liquid component (liquid refrigerant, i.e., liquid refrigerant). The liquid component includes not only liquid refrigerant but also lubricating oil. The accumulator 31 utilizes the fact that there is a density difference between the liquid component and the gaseous component, which causes a difference in centrifugal force due to the swirling flow. To generate a swirling flow, the suction side piping 41 is L-shaped and has a piping portion that extends horizontally inside the sealed container 40. At the end of this piping portion, there is a discharge port 41a that discharges along the inner surface of the sealed container 40. The gaseous components of the refrigerant gather near the center of the approximately circular cross-section of the accumulator 31, rise to the upper side of the accumulator 31 and accumulate there, while the liquid components of the refrigerant gather at the edges (inner surfaces) of the approximately circular cross-section of the accumulator 31, descend due to their own weight, and accumulate at the lower side (bottom) of the accumulator 31.

[0031] The discharge-side piping 42 has an inlet 42a at one end for drawing in the gaseous portion of the separated refrigerant. The inlet 42a is positioned a predetermined distance from the upper surface (inner side of the upper surface) of the accumulator 31 to draw in the gaseous refrigerant that accumulates above the accumulator 31, and the opening of the inlet 42a faces the upper surface of the accumulator 31. The discharge-side piping 42 extends vertically (in the longitudinal direction of the accumulator 31) to a position near the bottom surface (inner side of the lower surface) of the accumulator 31, then folds back and extends upward again, forming a U-shaped pipe. The other end of the discharge-side piping 42 extends vertically through the upper surface of the sealed container 40.

[0032] The discharge piping 42 has a return hole 42b for drawing in liquid at the lowest piping portion adjacent to the bottom surface of the accumulator 31. This piping portion extends horizontally (radially in the direction of the accumulator 31), and the return hole 42b is a hole of a predetermined diameter formed on the side of this piping portion. The compressor 30 allows a predetermined proportion of liquid to be contained in the refrigerant it draws in, and the liquid drawn in through the return hole 42b and the gaseous refrigerant drawn in through the intake port 42a are mixed and supplied to the compressor 30.

[0033] Since the liquid separated by the accumulator 31 contains foreign matter remaining in the existing piping, if the liquid is sucked in through the return hole 42b, the foreign matter will be drawn into the compressor 30. Therefore, as shown in Figure 3, a filter 43 is attached to the return hole 42b. The filter 43 protrudes outward from the outer circumference of the discharge-side piping 42 and is installed to block the return hole 42b, separating and removing foreign matter contained in the liquid separated by the accumulator 31. Note that the filter 43 does not need to protrude from the outer circumference of the discharge-side piping 42 as long as it can separate and remove foreign matter contained in the liquid.

[0034] The filter 43 installed in the return hole 42b can only remove foreign matter contained in the liquid, and if the amount of foreign matter in the liquid is large or the size of the foreign matter is large, the filter will quickly become clogged.

[0035] Therefore, an adsorption means is provided on the inner surface of the sealed container 40, extending from the bottom of the sealed container 40 to the height of the discharge port 41a, to adsorb foreign matter in the refrigerant. The adsorption means can be any material or means that can adsorb foreign matter. Here, in order to adsorb and remove mainly metallic foreign matter, a magnet 44 is used as the adsorption means. The magnet 44 can be a permanent magnet such as a neodymium magnet, alnico magnet, ferrite magnet, or samarium cobalt magnet, and of these, a neodymium magnet, which has the strongest paramagnetic properties, is preferable.

[0036] The refrigerant discharged from the outlet 41a swirls along the inner surface of the accumulator 31, which has a roughly circular cross-section. The magnet 44 is a rod-shaped object that extends from the bottom of the accumulator 31 to the height of the outlet 41a and is installed adjacent to the inner surface of the accumulator 31. As a result, centrifugal force acts on foreign matter in the swirling refrigerant, causing it to accumulate on the inner surface of the accumulator 31. Each time it passes over the magnet 44 installed adjacent to the inner surface, metallic foreign matter is attracted to it. The foreign matter descends due to its own weight, and most of it is contained in the liquid. However, metallic foreign matter is attracted and removed after swirling several times, so there is almost no metallic foreign matter in the liquid, and most of it is non-metallic foreign matter. Since metallic foreign matter makes up the majority of the foreign matter, and most of it is attracted to and removed by the magnet 44, the amount of foreign matter contained in the liquid is small and does not reach a level that would cause the filter 43 to clog.

[0037] In this way, the metal foreign matter, which makes up the majority of the foreign matter, can be attracted and removed by the magnet 44 before it passes through the filter 43, thus suppressing clogging of the filter 43. By suppressing clogging of the filter 43, it is possible to prevent a decrease in the performance of the compressor 30, and consequently, a decrease in the performance of the air conditioning system.

[0038] The accumulator 31 has the function of separating gas and liquid, as well as storing liquid refrigerant. The effective volume of the accumulator 31 is set to the maximum amount of liquid refrigerant that can be stored, and the height of the discharge port 41a of the suction side piping 41 (the lowest vertical position of the opening of the discharge port 41a) is set to be higher than the liquid level when the maximum amount of liquid refrigerant is stored. This is to ensure that even when the amount of liquid refrigerant is close to the maximum amount, gas and liquid can be properly separated as long as the maximum amount has not been reached.

[0039] As shown in Figure 2(b), the suction port 42a of the discharge piping 42 is oriented vertically towards the upper surface of the accumulator 31, and the discharge port 41a of the suction piping 41 is oriented horizontally towards the inner surface of the accumulator 31. Furthermore, the height of the suction port 42a (the vertical position of the opening of the suction port 42a) is higher than the height of the discharge port 41a (the uppermost vertical position of the opening of the discharge port 41a). This prevents foreign matter contained in the refrigerant discharged from the discharge port 41a from directly flowing into the suction port 42a.

[0040] The magnet 44 is made to extend at least from the uppermost vertical position of the return hole 42b to the uppermost vertical position of the opening of the discharge port 41a. This is to capture metallic foreign matter before it passes through the filter 43. The magnet 44 may also extend further below the uppermost vertical position of the return hole 42b, or further above the discharge port 41a.

[0041] The magnet 44 should preferably be thin so as not to create resistance to the swirling refrigerant. Since the refrigerant swirls, the magnet 44 does not need to be installed around the entire circumference of the inner surface of the sealed container 40, but can be installed only in a portion of the circumference. The magnet 44 can be one whose horizontally cut cross-section is arc-shaped to match the inner surface of the sealed container 40.

[0042] As shown in Figure 2(a), the discharge pipe 42 can be installed at the center of the sealed container 40 when viewed from above. This is to efficiently draw in the refrigerant gas that tends to accumulate near the center of the cross-section of the sealed container 40. As shown in Figure 2(a), the suction pipe 41 can be installed near the inner surface of the sealed container 40 when viewed from above. This is to generate a swirling flow by causing it to collide with the inner surface of the sealed container 40.

[0043] The position of the suction port 42a of the discharge pipe 42 is preferably such that, as shown in Figure 2(a), when viewed from above the sealed container 40, the refrigerant is drawn in after passing the magnet 44 as it swirls in the direction indicated by the arrow after being discharged from the discharge port 41a of the suction pipe 41. Therefore, although the magnet 44 can be installed at any position in the circumferential direction because the refrigerant swirls, it is preferable that the magnet 44 is positioned so that the refrigerant passes before the suction port 42a in the swirling direction of the refrigerant indicated by the arrow.

[0044] In the example shown in Figure 2(a), the intake port 42a is located near the side of the pipe portion 41b that extends horizontally inside the sealed container 40 of the L-shaped intake pipe 41, from which the refrigerant discharged from the discharge port 41a begins to swirl, passes over the magnet 44, and is drawn in after completing approximately one rotation.

[0045] To explain the flow of the refrigerant, the refrigerant drawn into the suction pipe 41 is discharged into the sealed container 40 from the discharge port 41a. The refrigerant discharged from the discharge port 41a collides with and reflects off the inner surface of the sealed container 40 located in front of the discharge port 41a. Because the inner surface is curved, the repeated collisions and reflections cause the refrigerant to flow along the inner surface, generating a swirling flow. A magnet 44 is installed on the inner surface of the sealed container 40. As the swirling refrigerant passes over the magnet 44, metallic foreign matter contained in the refrigerant is attracted to the magnet 44, and the metallic foreign matter is removed from the refrigerant. The metallic foreign matter is attracted to and removed by the magnet 44 as the refrigerant swirls around several times.

[0046] In the sealed container 40, if the refrigerant is in a gas-liquid two-phase state, the gaseous refrigerant accumulates at the top of the sealed container 40, while the liquid refrigerant descends due to its own weight and accumulates at the bottom of the sealed container 40. The gaseous refrigerant accumulated at the top of the sealed container 40 enters the discharge piping 42 through the suction port 42a by suction from the compressor 30, and the liquid refrigerant containing lubricating oil accumulated at the bottom of the sealed container 40 is sucked into the discharge piping 42 through the return hole 42b via the filter 43.

[0047] In the discharge piping 42, gaseous refrigerant and liquid refrigerant are mixed and supplied to the compressor 30. The lubricating oil contained in the liquid refrigerant is returned to the compressor 30 and used to lubricate the sliding parts of the compressor 30. In the case of a rotary compressor, the compressor 30 is equipped with a shaft, rollers, vanes, cylinders, bearings, etc., and there are parts (sliding parts) where components such as the shaft and bearings, cylinders and rollers, and cylinders and vanes slide against each other. The lubricating oil is supplied to these sliding parts to prevent seizing of the parts. The lubricating oil also lubricates the refrigerant circuit (outdoor expansion valve 33, etc.) through which the refrigerant circulates.

[0048] Figure 4 shows a second example configuration of the gas-liquid separator (accumulator 31) provided in the air conditioning system. The sealed container 40, discharge piping 42, filter 43, and magnet 44 are the same as in the example shown in Figure 2, so their explanation is omitted here.

[0049] In the example shown in Figure 2, the suction side piping 41 has a piping portion 41b that extends horizontally inside the sealed container 40. However, in the example shown in Figure 4, the piping portion 41b extends downward from the horizontal direction inside the sealed container 40 at a predetermined angle with respect to the horizontal direction, and has a discharge port 41a at its tip.

[0050] As shown in the example in Figure 2, if the piping section 41b extends horizontally inside the sealed container 40, some of the refrigerant that collides with the inner surface of the sealed container 40 may flow upwards where the gaseous refrigerant is accumulating, and be drawn in through the suction port 42a of the discharge piping 42.

[0051] On the other hand, as shown in the example in Figure 4, if the piping portion 41b extends diagonally downward from the horizontal within the sealed container 40, even if it collides with the inner surface of the sealed container 40, it becomes less likely to flow upward to where the gaseous refrigerant is accumulating, thereby suppressing the refrigerant discharged from the discharge port 41a from being directly sucked in from the suction port 42a of the discharge side piping 42.

[0052] If the angle θ at which the piping section 41b extends horizontally is too large, the fluid will be discharged directly toward the bottom surface, making it impossible to generate a swirling flow. Therefore, a small angle is sufficient, for example, it can be between 5° and 30°.

[0053] As described above, the risk of foreign matter entering the compressor after replacement and causing compressor failure can be reduced. In addition, by generating a swirling flow, metallic foreign matter can be adsorbed and removed sufficiently and efficiently. Furthermore, by positioning the inlet 42a higher than the outlet 41a, it is possible to prevent foreign matter in the refrigerant discharged from the outlet 41a from being directly drawn in through the inlet 42a.

[0054] Although the air conditioning device of the present invention has been described in detail using the embodiments described above, the present invention is not limited to the embodiments described above. It can be modified to include other embodiments, additions, changes, or deletions within the scope that a person skilled in the art can conceive, and any embodiment that achieves the function and effects of the present invention is included within the scope of the present invention.

[0055] Therefore, if the device is equipped with a gas-liquid separator, it is also possible to provide chillers, refrigerators, outdoor units, etc.

[0056] In short, the present invention provides an air conditioning system comprising (1) a gas-liquid separator, wherein the gas-liquid separator includes a sealed container, an intake-side pipe having a discharge port for drawing refrigerant into the sealed container and discharging it along the inner surface of the sealed container, a discharge-side pipe having an intake port for drawing in gaseous refrigerant separated in the sealed container and a hole for drawing in liquid refrigerant, and for discharging refrigerant to the outside of the sealed container, an adsorption means extending from the bottom of the sealed container to the height of the discharge port on the inner surface of the sealed container for adsorbing foreign matter in the refrigerant, and a filter provided to block the hole in the discharge-side pipe.

[0057] According to the present invention, (2) an air conditioning device as described in (1) above is provided, wherein the height of the intake port is higher than the height of the discharge port.

[0058] According to the present invention, (3) the suction side piping has a piping portion that extends horizontally within the sealed container, and the discharge port is provided at the tip of the piping portion, as described in (1) or (2) above.

[0059] According to the present invention, (4) the suction side piping has a piping portion that extends downward from the horizontal direction within the sealed container, and the discharge port is provided at the tip of the piping portion, as described in (1) or (2) above.

[0060] According to the present invention, (5) a swirling flow is generated as the refrigerant flows along the inner surface of the sealed container, and the intake port is positioned, when viewed from above the sealed container, after the swirling refrigerant discharged from the discharge port has passed the magnet, as described in any of (1) to (4) above.

[0061] Furthermore, according to the present invention, (6) the discharge side piping is a U-shaped pipe, with the intake port provided at one end, the other end extending vertically through the sealed container, and having a piping portion that extends horizontally through the bottom of the sealed container, and the hole for sucking in the liquid refrigerant accumulated in the sealed container is formed in the piping portion, and the filter is attached so as to block the hole, as described in any of (1) to (5) above. [Explanation of Symbols]

[0062] 10…Air conditioning system 11...Indoor unit 12...Outdoor unit 20…Indoor heat exchanger 21…Indoor fan 22... Indoor fan motor 30... Compressor 31... Accumulator 32... Four-way valve 33... Outdoor expansion valve 34…Outdoor heat exchanger 35…Outdoor fan 36... Outdoor fan motor 37...Control device 40... airtight container 41... Intake side piping 41a...Discharge port 41b…Piping part 42…Discharge side piping 42a...Inlet 42b... Return hole 43…Filter 44…Magnets

Claims

1. An air conditioning system equipped with a gas-liquid separator, The aforementioned gas-liquid separator, A sealed container, A suction-side piping having a discharge port for drawing refrigerant into the sealed container and discharging it along the inner surface of the sealed container, The sealed container has an intake port for drawing in gaseous refrigerant separated within the sealed container and a hole for drawing in liquid refrigerant, and a discharge side pipe for discharging refrigerant to the outside of the sealed container, The inner surface of the sealed container is provided with an adsorption means that extends from the bottom of the sealed container to the height of the discharge port and adsorbs foreign matter in the refrigerant, A filter provided to block the hole in the discharge side piping and Air conditioning system, including

2. The air conditioning device according to claim 1, wherein the height of the intake port is higher than the height of the discharge port.

3. The air conditioning device according to claim 2, wherein the intake side piping has a piping portion that extends horizontally within the sealed container, and the discharge port is located at the tip of the piping portion.

4. The air conditioning device according to claim 2, wherein the intake piping has a piping portion that extends downward from the horizontal direction within the sealed container, and the discharge port is at the tip of the piping portion.

5. The air conditioning device according to claim 3 or 4, wherein a swirling flow is generated as the refrigerant flows along the inner surface of the sealed container, and the intake port is positioned after the swirling refrigerant discharged from the discharge port has passed over the adsorption means, when the sealed container is viewed from above in a plan view.

6. The air conditioning device according to claim 1, wherein the discharge side piping is a U-shaped pipe, with the intake port provided at one end, the other end extending vertically through the sealed container, and having a piping portion that extends horizontally through the bottom of the sealed container, the piping portion having the hole for drawing in the liquid refrigerant accumulated in the sealed container, and the filter is attached so as to block the hole.

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