CN110857822A

CN110857822A - Gas-liquid separator and air conditioning system

Info

Publication number: CN110857822A
Application number: CN201810968969.6A
Authority: CN
Inventors: 李理; 王美; 董军启
Original assignee: Hangzhou Sanhua Research Institute Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2018-08-23
Filing date: 2018-08-23
Publication date: 2020-03-03

Abstract

The application provides a vapour and liquid separator and air conditioning system. The gas-liquid separator comprises a first cylinder and a second cylinder sleeved outside the first cylinder at a preset distance, and an interlayer space is arranged between the first cylinder and the second cylinder; at least part of the side wall surface of the first cylinder is inwards recessed to form an avoiding part; the gas-liquid separator also comprises a heat exchange assembly arranged in the interlayer space, and the heat exchange assembly comprises a collecting pipe; the collecting pipe extends along the axial direction of the first cylinder, and at least part of the collecting pipe is arranged corresponding to the avoiding part. This application is through being located at least the section of thick bamboo wall department of the tip of first barrel sets up dodges the portion to at least part of pressure manifold corresponds this and dodges the portion setting, makes vapour and liquid separator structure compacter.

Description

Gas-liquid separator and air conditioning system

Technical Field

The application relates to the technical field of air conditioners, in particular to a gas-liquid separator and an air conditioning system.

Background

In an air conditioning system, an intermediate heat exchanger is often used to exchange heat between a low-temperature refrigerant coming out of an evaporator and a high-temperature refrigerant coming out of a cooler, so that the temperature of the refrigerant entering a compressor is increased, the temperature of the refrigerant before throttling is reduced, and the refrigeration efficiency of the heat exchanger is improved. Generally, most compressors can only compress gaseous refrigerant, and if liquid refrigerant enters the compressor, liquid impact can be caused to damage the compressor. In order to avoid compressor slugging, a gas-liquid separator needs to be installed before the compressor. In the related art, a gas-liquid separator integrating heat exchange and gas-liquid separation functions is often adopted, so that how to make the structure of the gas-liquid separator integrating heat exchange and gas-liquid separation more compact is a problem to be solved urgently at present.

Disclosure of Invention

The invention aims to provide a gas-liquid separator which has a more compact structure and integrates the functions of heat exchange and gas-liquid separation.

According to a first aspect of embodiments herein, there is provided a gas-liquid separator. The gas-liquid separator comprises a first cylinder and a second cylinder sleeved outside the first cylinder at a preset distance, and an interlayer space is arranged between the first cylinder and the second cylinder; wherein, the side wall surface of at least part of the first cylinder is inwards concave to form an avoiding part;

the gas-liquid separator also comprises a heat exchange assembly arranged in the interlayer space, and the heat exchange assembly comprises a collecting pipe; the collecting pipe extends along the axial direction of the first cylinder, and the collecting pipe is arranged corresponding to the avoiding part.

Optionally, the avoiding portion extends to the other end of the first cylinder from one end of the first cylinder along the axis direction of the first cylinder, a first opening is formed in one end of the avoiding portion, and a second opening is formed in the other end of the avoiding portion.

Optionally, the one end of first barrel is opened, and the other end is provided with the closure the shutoff portion of second barrel, dodge the portion including follow the axis direction of first barrel certainly the open one end of first barrel extends to the first portion of dodging of the other end of first barrel, and be located the shutoff portion and with the first second of dodging the portion correspondence dodges the portion.

Optionally, the avoiding portion includes a groove extending in an axial direction of the first cylinder.

Optionally, the avoiding portion includes a first groove or two adjacent second grooves and third grooves.

Optionally, the avoiding portion includes a first straight wall surface extending in an axial direction of the first cylinder.

Optionally, the avoiding portion extends from one end of the first cylinder to the other end of the first cylinder by a preset distance to form a first plane and a slope connected with the first plane.

Optionally, the avoiding portion includes a second plane extending from the slope to the other end of the first cylinder.

Optionally, the collecting pipes include a first collecting pipe and a second collecting pipe which are arranged side by side, the heat exchange assembly includes a flat pipe, one end of the flat pipe is inserted into the first collecting pipe, and the other end of the flat pipe is inserted into the second collecting pipe; the end part of the first collecting pipe is provided with a first joint and a second joint, and two ends of the second collecting pipe are sealed.

Optionally, the gas-liquid separator includes a first end cover covering the upper ends of the first cylinder and the second cylinder, the first end cover is provided with a first through hole corresponding to the first collecting pipe, and at least part of the first joint is disposed in the first through hole;

the gas-liquid separator comprises a second end cover covering the lower end of the second cylinder, a second through hole corresponding to the first collecting pipe is formed in the second end cover, and at least part of the second joint is arranged in the second through hole.

Optionally, a mass accommodating cavity is formed in the first cylinder, and a gas-liquid separation assembly is arranged in the mass accommodating cavity.

Optionally, heat dissipation elements are respectively arranged on one side of the flat tube, which faces the outer wall surface of the first tube body, and one side of the flat tube, which faces the inner wall surface of the second tube body, in a wrapping manner, wherein one part of the heat dissipation elements is in contact with the outer wall surface of the first tube body, and the other part of the heat dissipation elements is in contact with the inner wall surface of the second tube body.

According to a second aspect of embodiments of the present application, there is provided an air conditioning system. The air conditioning system at least comprises a heat exchanger and a compressor which are connected through a pipeline, and the gas-liquid separator is arranged between the heat exchanger and the compressor.

According to the technical scheme, the first cylinder body is provided with the avoiding part, and at least part of the collecting pipe is arranged corresponding to the avoiding part, so that the structure of the gas-liquid separator is more compact.

Drawings

Fig. 1 is a schematic perspective view of a gas-liquid separator according to an exemplary embodiment of the present application.

FIG. 2 is a schematic cross-sectional view of a gas-liquid separator in accordance with an exemplary embodiment of the present application.

Fig. 3A is a schematic perspective view of a first cylinder of a gas-liquid separator according to an exemplary embodiment of the present application.

Fig. 3B is a cross-sectional view of the first cylinder shown in fig. 3A.

Fig. 3C is an assembly structure diagram of the first cylinder and the heat exchanger shown in fig. 3A.

Fig. 4A is a schematic perspective view of a first cylinder of a gas-liquid separator according to another exemplary embodiment of the present application.

Fig. 4B is a cross-sectional view of the first cylinder shown in fig. 4A.

Fig. 5 is a schematic perspective view of a first cylinder of a gas-liquid separator according to another exemplary embodiment of the present application.

Fig. 6 is a schematic perspective view of a first cylinder of a gas-liquid separator according to another exemplary embodiment of the present application.

Fig. 7A is a schematic perspective view of a first cylinder of a gas-liquid separator according to another exemplary embodiment of the present application.

Fig. 7B is a schematic view of an assembly structure of the first cylinder and the heat exchanger shown in fig. 7A.

Fig. 8 is a schematic perspective view of a first cylinder of a gas-liquid separator according to another exemplary embodiment of the present application.

Fig. 9 is a schematic perspective view of a first cylinder of a gas-liquid separator according to another exemplary embodiment of the present application.

FIG. 10 is a schematic medium flow diagram of a low pressure loop of a gas-liquid separator in accordance with an exemplary embodiment of the present application.

FIG. 11 is a schematic medium flow diagram of a high pressure loop of a gas-liquid separator in accordance with an exemplary embodiment of the present application.

FIG. 12 is a schematic view of a refrigeration system connection according to an exemplary embodiment of the present application.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the terms "first," "second," and the like as used in the description and in the claims, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. References to "a number" in this application include both two and more.

Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The features of the following examples and embodiments may be combined with each other without conflict.

Fig. 1 is a schematic perspective view of a gas-liquid separator according to an exemplary embodiment of the present application. The gas-liquid separator can be applied to various refrigeration systems, and is suitable for various fields such as household air conditioners, commercial air conditioners, automobiles and the like. Referring to fig. 1 to 12, a refrigeration system is shown. The refrigerating system comprises a heat exchanger, a cooler, an expansion valve, a compressor and the like which are connected by pipelines, wherein a gas-liquid separator 100 is arranged between the heat exchanger and the compressor.

The gas-liquid separator 100 includes a first cylinder 2 and a second cylinder 3 sleeved outside the first cylinder 2 at a predetermined distance. An interlayer space 202 for circulating a refrigerant (i.e., a first refrigerant) is provided between the first cylinder 2 and the second cylinder 3. And an escape part 29 formed by at least partially recessing the side wall surface of the first cylinder 2. The relief 29 can be formed by a part of the wall of the first cylinder 2 being recessed or bent inwards. In particular, the relief portion 29 may be formed by a stamping process. Of course, other processes may be adopted to form the avoiding portion, which is not limited in the present application and may be set according to a specific application environment.

The gas-liquid separator 100 has opposing first and second ends 101 and 102. The first end 101 may be regarded as an upper end and the second end 102 may be regarded as a lower end, unless otherwise specified. Wherein the upper and lower ends are for illustrative purposes only and are not limited to one position or one spatial orientation.

In some embodiments, the first cylinder 2 and the second cylinder 3 are both hollow cylinders, and the outer diameter of the first cylinder 2 is smaller than the inner diameter of the second cylinder 3. A mass accommodating cavity 201 is formed in the first cylinder 2, a gas-liquid separation assembly 11 is disposed in the mass accommodating cavity 201, and the related contents of the gas-liquid separation assembly 11 will be described in detail in the following embodiments, which are not described herein again.

The interlayer space 202 is a chamber surrounded by the outer wall surface of the first cylinder 2 and the inner wall surface of the second cylinder 3. Optionally, the lower end surface of the first cylinder 2 is higher than the lower end surface of the second cylinder 3. Accordingly, the lower end of the first cylinder 2 is provided with an inner end cap 6 to isolate the mass accommodating chamber 201 from the sandwiching space 202.

Further, the gas-liquid separator 100 includes a heat exchange assembly 20 disposed in the plenum 202. The heat exchange assembly 20 comprises a flat pipe 21 and a collecting pipe 211 arranged at the end part of the flat pipe 21. The end of the flat tube 21 is inserted into the header 211, so that the inner space of the flat tube 21 is communicated with the inner space of the header 211. The axial direction r of the collecting pipe 211 along the first cylinder 2 extends, and at least part of the collecting pipe 211 is correspondingly provided with the avoiding part 29, so that the structure of the gas-liquid separator is more compact, the position of the collecting pipe is deviated to the axial line of the first cylinder, namely, the end part of the collecting pipe is increased with the distance of the second cylinder, and the end cover of the gas-liquid separator is provided with enough space to be connected with the joint at the end part of the collecting pipe. The phrase "the main pipe 211 is disposed corresponding to the avoiding portion 29" means that at least a part of the wall surface of the avoiding portion 29 adjacent to the main pipe 211 is attached to or adjacent to or has a small gap due to a manufacturing process, and further, the shape and the size of the avoiding portion 29 are substantially the same as those of the main pipe 211 adjacent to the avoiding portion 29, and the shape and the size of the avoiding portion 29 are both disposed in cooperation. Correspondingly, the interlayer space 202 is a channel of the first refrigerant, and the flat tubes 21 are channels of the second refrigerant. Optionally, the first refrigerant is a low-temperature refrigerant, and the second refrigerant is a high-temperature refrigerant.

In some embodiments, the flat tube 21 is formed by a plurality of flat tubes arranged in parallel along the same direction to cover the outer wall surface of the first cylinder 2. The flat pipe 21 can be attached to the outer wall surface of the first cylinder 2, and heat exchange between the interlayer space 202 and the flat pipe 21 is realized through heat radiation of the outer wall surface of the first cylinder 2. The second refrigerant channel and the first refrigerant channel of the gas-liquid separator 100 are separately arranged, the structure is simple, and the risk of mixing the refrigerants in the two states after pipeline leakage does not occur.

In another embodiment, the outer wall surface of the flat tube 21 is attached to the inner wall surface of the second cylinder 3. The flat tubes 21 are flat tubes wound around the inner wall surface of the second cylinder 3 in a spiral manner or flat tubes having other cross-sectional shapes.

In still other embodiments, the flat tubes 21 are not attached to the outer wall surface of the first cylinder 2 and the inner wall surface of the second cylinder 3, but are spaced apart from each other by a certain distance.

For example, in some embodiments, the flat tube 21 includes a plurality of flat tubes 210 arranged in parallel, and accordingly, the flat tubes 210 are inserted into the header 211. The second refrigerant can flow in the flat tubes 210 in the same direction. Because flat pipe 21 sets up in the intermediate layer space. The second refrigerant flows in the flat tubes 210, and the heat of the second refrigerant is exchanged with the first refrigerant in the interlayer space through the tube walls of the flat tubes.

In some embodiments, the header 211 includes a first header 2110 and a second header 2111 arranged side by side, and one end of the flat tube 21 is inserted into the first header 2110 and the other end is inserted into the second header 2111. A first joint 213 is disposed at an end of the first header 2110 to lead out the second refrigerant in the first header 2110 or introduce the second refrigerant into the first header 2110. A second joint 212 is disposed at an end of the second collecting pipe 2111, so as to correspondingly introduce the second refrigerant into the second collecting pipe 2111 or lead out the second refrigerant in the second collecting pipe 2111.

Optionally, a partition 2113 is disposed in the first header 2110 to partition an internal space of the first header 2110 into a first chamber 2115 and a second chamber 2116 which are independent of each other, so as to increase a flow path of the second refrigerant. Wherein the first chamber 2115 is located below the second chamber 2116. Accordingly, a part of the flat tubes 21 communicates with the inside of the first chamber 2115 and the second header 2111, and the other part communicates with the inside of the second header 2111 and the second chamber 2116.

Further, the gas-liquid separator includes a first end cap 4 covering the upper ends of the first cylinder 2 and the second cylinder 3, and the first end cap 4 is provided with a first through hole 41 corresponding to the first header 2110. Specifically, at least a portion of the first contact 213 is fitted into the first through hole 41.

The first end cap 4 is further provided with a first port 42 communicating with the mass accommodating chamber 201. The first port 42 may be provided with a first connection pipe 103 for introducing the first refrigerant into the mass accommodating chamber 201.

The second cylinder 3 is welded to the first end cap 4 at its upper end, and the first cylinder 2 abuts against the first end cap 4 at its upper end.

Further, the gas-liquid separator includes a second end cap 5 covering the lower end of the second cylinder 3. The second end cap 5 is provided with a second through hole 51 corresponding to the first header 2110. Specifically, at least a portion of the second connector 212 is mounted in the second through hole 51.

The second end cap 5 is further provided with a second port 52 communicating with the sandwiched space 202. Similarly, a second connection pipe 104 may be disposed in the second port 52, and the first refrigerant subjected to heat exchange in the interlayer space 202 may be led out through the second connection pipe 104.

The second end cap 5 and the inner end cap 6 are spaced apart by a predetermined distance. Accordingly, the second interface 52 may be disposed at or adjacent the center of the second end cap 5. Of course, the second interface 52 may be disposed at other positions of the second end cap 5, which is not limited in this application and may be set according to the specific application environment.

Further, in some embodiments, the relief portion 29 extends from one end of the first cylinder 2 to the other end of the first cylinder 2 in the axial direction of the first cylinder 2. Compared with a gas-liquid separator without the relief portion 29, the position of the header pipe is shifted toward the axis r of the first cylinder, i.e., the distance between the header pipe and the axis r of the first cylinder is made smaller. Accordingly, the distance between the first through hole 41 and the center of the first end cap 4 is also smaller, so that the first end cap 4 has a sufficient space for disposing the first joint 213. Similarly, the second end cap 5 has enough space to accommodate the installation of the second connector 212.

The offset distance of the manifold to the axis r of the first cylinder is related to the size (e.g., depth of recess) of the relief 29. In the concrete implementation, the mounting of the collecting main, the joints (including the first joint and the second joint) and the like with different sizes can be adapted by adjusting the size of the avoiding part 29.

Both ends of the avoiding part 29 can be provided with openings so as to facilitate the arrangement of the collecting pipe. For example, in the first cylindrical body 2 shown in fig. 3A, an opening 2911 is opened at the upper end of the escape portion 29, and an opening 2912 is opened at the lower end of the escape portion 29. This arrangement is applicable to an embodiment in which the first joint 213 and the second joint 212 are provided at both ends of the gas-liquid separator 100, respectively.

In some embodiments, the upper end of the first cylinder 2 is open and the lower end is provided with a stopper 28 that closes the second cylinder 2. For example, as shown in fig. 5, the escape portion 29 includes a first escape portion 295 extending from the open upper end of the first tubular body 2 to the lower end of the first tubular body 2 in the axial direction r of the first tubular body 2, and a second escape portion 281 located at the blocking portion 28 and corresponding to the first escape portion 295. The second escape portion 281 may be aligned with the first escape portion 295. Accordingly, an opening 2951 is opened at the upper end of the escape portion 29, and an opening 2811 is opened at the lower end of the escape portion 29.

As shown in fig. 6, the escape portion 29 includes a first escape portion 296 extending from the open upper end of the first cylinder 2 to the lower end of the first cylinder 2 in the axial direction r of the first cylinder 2, and a second escape portion 282 located at the blocking portion 28 and corresponding to the first escape portion 296. The second relief 282 may be aligned with the first relief 296.

The second avoiding portion 281 and the first avoiding portion 295 may also include planes aligned with each other, which is not limited in this application and may be set according to a specific application environment. It should be noted that in some embodiments, the blocking portion 28 may be understood as an inner end cap 6.

Of course, the escape portion 29 may be open at one end and closed at the other end. This arrangement is suitable for embodiments in which both the first connector 213 and the second connector 212 are disposed at the first end 101. The present application is not limited to this, and may be set according to a specific application environment.

In some embodiments, the relief 29 comprises a groove extending in the axial direction r of the first barrel 2.

For example, the relief 29 can include a first groove 291. Taking the case that the collecting pipe 211 includes a first collecting pipe 2110 and a second collecting pipe 2111 which are arranged in parallel, the collecting pipe 211 is arranged corresponding to the avoiding portion 29, that is, the first collecting pipe 2110 and the second collecting pipe 2111 may be partially or completely arranged in the first groove 291. The first header 2110 and the second header 2111 are located at a smaller distance from the axis r of the first cylinder 2 than in a gas-liquid separator without the relief portion 29. Accordingly, the distance between the first through hole 41 and the center of the first end cap 4 is smaller, and the distance between the second through hole 51 and the center of the second end cap 5 is smaller. So that the first end cap 4 has enough space to arrange the first connector 213 and the second end cap 5 has enough space to arrange the second connector 212, i.e. the installation of the first connector 213 and the second connector 212 is facilitated.

Alternatively, the relief 29 may include two adjacently disposed second and

third grooves

2921 and 2922. Similarly, for example, the collecting pipe 211 includes a first collecting pipe 2110 and a second collecting pipe 2111 which are arranged in parallel, and the collecting pipe 211 is arranged corresponding to the avoiding portion 29, that is, at least a portion of the first collecting pipe 2110 may be arranged in the second groove 2921, and at least a portion of the second collecting pipe 2111 may be arranged in the third groove 2922. I.e., the second grooves 2921 correspond to the first header 2110, and the third grooves 2922 may correspond to the second header 2111. The embodiment with two grooves here is advantageous for ensuring the volume of the mass chamber 201 compared to the embodiment in which the relief 29 comprises only the first groove 291. Note that the depth and the degree of curvature of the second groove 2921 and the third groove 2922 may be set according to the pipe diameters of the first header 2110 and the second header 2111.

Accordingly, in the embodiment illustrated in FIG. 6, the first avoidance portion 296 includes adjacently disposed grooves 2961 and 2962. Its second relief 296 includes a groove 2821 corresponding to the groove 2961 and a groove 2822 corresponding to the groove 2962.

The groove included in the escape portion 29 may have other curved shapes. The present application is not limited to this, and may be set according to a specific application environment.

Further alternatively, the escape portion 29 includes a first straight wall surface 293 extending in the axial direction r of the first cylinder 2. The manifold 211 is disposed in correspondence with the relief 29, which means that the manifold 211 is disposed adjacent to the first flat wall 293. The header 211 may or may not be attached to the first flat wall 293.

In other embodiments, the bypass portion 29 extends from the upper end to the lower end of the first cylinder 2 by a certain distance (e.g., a predetermined distance) to form a first plane 2941 and a slope 2942 (see fig. 8) connecting the lower end of the first plane 2941. Of course, in other embodiments, the first plane may be replaced by an arc-shaped concave surface to form the groove accordingly. Compared with a gas-liquid separator without the relief portion 29, a sufficient space can be reserved at the first end cover 4 corresponding to the relief portion 29 to provide the first through hole 41 with a relatively large diameter, so that the installation of the first joint is facilitated. The manifold 211 is positioned relative to the relief 29, which is understood to be positioned adjacent to the first plane 2941 and the ramp 2942.

In still other embodiments, the relief 29 can include a second plane 2943 (see FIG. 9) extending downward from a lower end of the ramp 2942 in addition to the first plane 2941 and the ramp 2942 described above. Wherein the second plane 2943 may be a flat wall. Of course, in other embodiments, the second plane 2943 may be replaced by an arcuate concave surface to form a groove accordingly.

Further, a heat sink 23 is provided in the interlayer space 202 to enhance heat exchange. In some embodiments, the heat dissipation members 23 are wrapped on both sides of the flat tube 21 facing the outer wall surface of the first cylinder 2 and the inner wall surface of the second cylinder 3, that is, the heat dissipation members 23 are disposed on both sides of the flat tube 21. The two heat dissipating members 23 may be brazed to the outer wall surface of the first cylindrical body 2 and the inner wall surface of the second cylindrical body 3, or may be brazed to both sides of the flat tube 21. It is of course also possible to provide the heat sink only on one side of the flat tubes. The heat radiating element can be brazed on the outer wall surface of the first cylinder body, or the inner wall surface of the second cylinder body, or one of the two sides of the flat tube. Of course, the heat sink 23 may be disposed in other manners, and may be in contact with only the outer wall surface of the first cylinder, the inner wall surface of the second cylinder, or the outer wall of the flat tube 21. The number and the setting mode of the radiating pieces are not limited, and the radiating pieces can be set according to specific application environments.

In the present embodiment, the heat dissipation member 23 is formed by sequentially connecting a plurality of sheet-like units in a shape like a Chinese character ji end to end, so as to increase the heat dissipation area; the inverted V-shaped convex parts of any two adjacent columns or two adjacent rows of radiating fins are distributed in a staggered mode, and disturbance to heat exchange refrigerant is effectively increased.

Further, the gas-liquid separation assembly 11 includes a gas-guiding tube 111, a sleeve 112 covering the gas-guiding tube 111, and an umbrella cap 113 covering the upper portion of the gas-guiding tube 111 and located above the sleeve 112.

The umbrella cap 113 includes a main body portion 1131 sleeved on the air tube 111 and an outer extension portion 1132 extending downward along the outward edge of the main body portion 1131. A gap is formed between the upper surface of the body 1131 and the lower surface of the first end cap 4, so that the first refrigerant can flow from the first connecting pipe 103 into the mass accommodating cavity 201. A gap is formed between the outer wall surface of the extension portion 1132 and the inner wall surface of the first cylinder 2, so that the first refrigerant continues to flow downward after entering the mass accommodating cavity 201 from the first connecting pipe 103. A gap is provided between the lower surface of the body portion 1131 and the upper end surface of the sleeve 112, a gap is provided between the inner wall surface of the outer extension portion 1132 and the outer wall of the sleeve 112, and the upper end of the sleeve 112 is opened to communicate the mass accommodating chamber 201 with the passage 115.

The inner wall surface of the sleeve 112 and the outer wall surface of the air duct 111 are spaced apart by a predetermined distance, so that a channel 115 for a first refrigerant flow passage is formed between the inner wall surface of the sleeve 112 and the outer wall surface of the air duct 111. The lower end of the sleeve 112 is connected to the inner end cap 6 to isolate the lower end of the channel 115 from the mass containing chamber 201. A gap is left between the lower end surface of the air duct 111 and the inner end cap 6 to communicate the passage 115 with the interior of the air duct 111.

A channel 43 extending along the radial direction of the first end cap 4 is arranged in the first end cap 4, and the upper end of the air duct 111 is inserted into the first end cap 4. One end of the passage 43 communicates with the space inside the airway tube 111, and the other end communicates with the interlayer space 202. The number of the channels 43 may include one or more.

Further, a molecular sieve can be arranged in the first cylinder 2. The molecular sieve is disposed in the mass-containing chamber 201, and may be connected to the gas-liquid separation module 11, for example.

Specifically, when the gas-liquid separator 100 is operated, the flow direction of the first refrigerant is as shown in fig. 10. The first refrigerant flows into the mass accommodating chamber 201 from the first connecting pipe 103, continues to flow downward from the gap between the outer wall surface 1132 and the inner wall surface of the first cylinder 2, then flows through the gap between the inner wall surface of the outer wall surface 1132 and the outer wall surface of the sleeve, and the gap between the lower surface of the body 1131 and the upper end surface of the sleeve 112 in this order, enters the passage 115 from the upper end of the sleeve 112, and continues to flow downward in the passage 115. Then, the first refrigerant enters the air duct 111 from the lower end of the air duct 111, and continues to flow upward in the air duct 111. The first coolant then enters the sandwiched space 202 through the channel 43 and continues to flow downward. Finally, the first refrigerant flows out of the gas-liquid separator 100 through the second connection pipe 104 to enter the compressor. At this point, the first refrigerant completes the whole flow of gas-liquid separation and heat exchange. In the process that the first refrigerant flows in the interlayer space 202, the first refrigerant exchanges heat with the second refrigerant in the flat tube 21 through the tube wall of the flat tube 21, the heat dissipation member 23 and the like

The first refrigerant that enters the mass accommodating chamber 201 from the first connection pipe 103 is usually a gas-liquid mixed first refrigerant. After entering the mass accommodating cavity 201, the liquid first refrigerant sinks due to gravity, and the gaseous first refrigerant floats upwards and enters the channel 115 from the upper end of the sleeve 112, so that gas-liquid separation of the first refrigerant is realized.

The flow direction of the second refrigerant is shown in fig. 11. The second refrigerant enters the first chamber 2115 from the second joint 212 provided in the second through hole 51, flows into the second header 2111 through the flat tube 21 communicating with the first chamber 2115, and flows into the second header 2111. The second refrigerant then flows into the second chamber 2116 through part of the flat tube 21. Finally, the second cooling medium flows out through the first joint 213 disposed at the first through hole 41. And the second refrigerant completes the heat exchange process.

Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application, and all changes, substitutions and alterations that fall within the spirit and scope of the application are to be understood as being covered by the following claims.

Claims

1. A gas-liquid separator is characterized by comprising a first cylinder and a second cylinder sleeved outside the first cylinder at a preset distance, wherein an interlayer space is arranged between the first cylinder and the second cylinder; at least part of the side wall surface of the first cylinder is inwards recessed to form an avoiding part;

the gas-liquid separator also comprises a heat exchange assembly arranged in the interlayer space, and the heat exchange assembly comprises a collecting pipe; the collecting pipe extends along the axial direction of the first cylinder, and at least part of the collecting pipe is arranged corresponding to the avoiding part.

2. The gas-liquid separator according to claim 1, wherein the avoiding portion extends from one end of the first cylindrical body to the other end of the first cylindrical body in an axial direction of the first cylindrical body, and the avoiding portion has a first opening at one end and a second opening at the other end.

3. The gas-liquid separator according to claim 1, wherein one end of the first cylindrical body is open, and the other end is provided with a blocking portion that blocks the second cylindrical body, and the avoiding portion includes a first avoiding portion that extends from the open end of the first cylindrical body to the other end of the first cylindrical body in the axial direction of the first cylindrical body, and a second avoiding portion that is located at the blocking portion and corresponds to the first avoiding portion.

4. The gas-liquid separator according to claim 2 or 3, wherein the avoiding portion comprises a groove extending in an axial direction of the first cylinder.

5. The gas-liquid separator of claim 4, wherein the relief comprises one first groove or two adjacently disposed second and third grooves.

6. The gas-liquid separator according to claim 2 or 3, wherein the avoiding portion includes a first straight wall surface extending in an axial direction of the first cylinder.

7. The gas-liquid separator according to claim 1, wherein the relief portion extends from one end of the first cylinder to the other end of the first cylinder by a predetermined distance to form a first plane and a slope connected to the first plane.

8. The gas-liquid separator of claim 7, wherein the relief comprises a second flat surface extending from the ramp toward the other end of the first cylinder.

9. The gas-liquid separator according to claim 1, wherein the collecting pipes comprise a first collecting pipe and a second collecting pipe arranged side by side, the heat exchange assembly comprises a flat pipe, one end of the flat pipe is inserted into the first collecting pipe, and the other end of the flat pipe is inserted into the second collecting pipe; the end part of the first collecting pipe is provided with a first joint and a second joint, and two ends of the second collecting pipe are sealed.

10. The gas-liquid separator according to claim 9, wherein the gas-liquid separator comprises a first end cap covering upper ends of the first cylinder and the second cylinder, the first end cap being provided with a first through hole corresponding to the first collecting pipe, and at least a portion of the first joint being disposed in the first through hole;

11. The gas-liquid separator of claim 1, wherein a mass-containing cavity is disposed within the first barrel, the mass-containing cavity having a gas-liquid separation assembly disposed therein.

12. The gas-liquid separator according to claim 9, wherein the side of the flat tube facing the outer wall surface of the first cylinder and the side facing the inner wall surface of the second cylinder each include a heat radiating member, wherein a part of the heat radiating member is in contact with the outer wall surface of the first cylinder and another part of the heat radiating member is in contact with the inner wall surface of the second cylinder.

13. An air conditioning system, characterized by comprising at least a heat exchanger and a compressor connected by a pipeline, wherein the gas-liquid separator as claimed in any one of claims 1 to 12 is arranged between the heat exchanger and the compressor.