CN110857824A

CN110857824A - Gas-liquid separator and air conditioning system

Info

Publication number: CN110857824A
Application number: CN201810969630.8A
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
Anticipated expiration: 2038-08-23
Also published as: CN110857824B

Abstract

The application provides a vapour and liquid separator and air conditioning system. The gas-liquid separator comprises a first cylinder, a second cylinder sleeved outside the first cylinder at a preset distance, and a first end cover covering the upper ends of the first cylinder and the second cylinder; an interlayer space is formed between the first cylinder and the second cylinder; the gas-liquid separator comprises a heat exchange assembly arranged in the interlayer space, and the heat exchange assembly comprises a collecting pipe arranged at the end part of the heat exchange assembly; first end cover open be equipped with the baffling passageway of the inside cavity intercommunication of pressure manifold, the baffling passageway link up the upper and lower surface of first end cover, the baffling passageway is including being located the first opening of first end cover upper surface and being located the second opening of first end cover lower surface, wherein, first open-ended the central axis with second open-ended the central axis is not on same straight line, just first opening is close to than the second opening the center of first end cover sets up.

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

Different refrigerants have different pressure requirements on the work of the air conditioning system, when a high-pressure refrigerant is used, the working pressure of the air conditioning system is higher than that of a low-pressure refrigerant, higher requirements are also provided for the pressure resistant strength of a gas-liquid separator with a heat exchange function, and particularly higher requirements are provided for the strength of parts such as a collecting pipe for circulating a high-temperature refrigerant. In the related art, the pressure resistance of the header is ensured by increasing the overall size of the header. In order to ensure that the flow velocity in the pipe is in a reasonable range, the size of the gas-liquid separator is limited, and only the outer diameter of the collecting pipe can be increased, so that the overall size of the high-pressure collecting pipe is increased, and inconvenience is brought to the installation of the collecting pipe.

Disclosure of Invention

The invention aims to solve the problem that the installation space of the collecting pipe is insufficient after the integral size of the collecting pipe is increased due to the limitation of the size of the gas-liquid separator.

According to a first aspect of embodiments herein, there is provided a gas-liquid separator. The gas-liquid separator comprises a first cylinder, a second cylinder sleeved outside the first cylinder at a preset distance, and a first end cover covering the upper ends of the first cylinder and the second cylinder; an interlayer space is formed between the first cylinder and the second cylinder;

the gas-liquid separator comprises a heat exchange assembly arranged in the interlayer space, and the heat exchange assembly comprises a collecting pipe arranged at the end part of the heat exchange assembly;

first end cover open be equipped with the baffling passageway of the inside cavity intercommunication of pressure manifold, the baffling passageway link up the upper and lower surface of first end cover, the baffling passageway is including being located the first opening of first end cover upper surface and being located the second opening of first end cover lower surface, wherein, first open-ended the central axis with second open-ended the central axis is not on same straight line, just first opening is close to than the second opening the center of first end cover sets up.

Optionally, the baffle channel includes a first section extending downward from the first opening, a second section extending upward from the second opening, and a third section connecting the first section and the second section; the first section and the second section are arranged in a staggered mode, and the distance between the first section and the center of the first end cover is smaller than the distance between the second section and the center of the first end cover.

Optionally, the first end cover includes a body portion connected to the second cylinder and a pressing cover disposed on a side of the body portion away from the second cylinder; the first section penetrates through the upper surface and the lower surface of the gland, and the third section and the second section are arranged on the body part and penetrate through the upper surface and the lower surface of the body part.

Optionally, the third section is an inclined channel; wherein the content of the first and second substances,

at least one inclined plug forms an inclined side wall of the inclined channel; or the like, or, alternatively,

the inclined step surface arranged on the third section and the raised head arranged on the gland form an inclined side wall of the inclined channel.

Optionally, the third section includes a strip-shaped groove, the strip-shaped groove includes a first groove portion and a second groove portion, and the first groove portion is closer to the center of the end cover than the second groove portion; wherein the first slot portion is in communication with the first segment and the second slot portion is in communication with the second segment.

Optionally, a welding boss corresponding to the second section is arranged below the second section, and the upper end of the collecting pipe is arranged in the welding boss.

Optionally, the collecting pipes include a first collecting pipe and a second collecting pipe which are arranged side by side, a flat pipe is further arranged between the first barrel and the second barrel, 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 heat exchanger comprises a first collecting pipe and a second collecting pipe, wherein a partition is arranged in the first collecting pipe, a first joint and a second joint are arranged at the end part of the first collecting pipe, and two ends of the second collecting pipe are sealed.

Optionally, the gas-liquid separator includes a second end cover covering the lower end of the second cylinder, and a deflecting channel communicated with the other end of the collecting pipe is arranged on the second end cover.

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, the first end cap is provided with a first interface communicated with the mass accommodating cavity, a channel extending along the radial direction of the first end cap is arranged in the first end cap, and the channel is communicated with the mass accommodating cavity and the interlayer space.

Optionally, heat dissipation elements are respectively arranged on one side of the flat tubes, which faces the outer wall surface of the first cylinder body, and one side of the flat tubes, which faces the inner wall surface of the second cylinder body, and one part of the heat dissipation elements is in contact with the outer wall surface of the first cylinder body while the other part is in contact with the inner wall surface of the second cylinder 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.

It is seen from above technical scheme that this application makes vapour and liquid separator's end cover have sufficient space to set up the pressure manifold, especially the device such as the joint of pressure manifold tip through setting up baffling passageway at first end cover.

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. 3 is a perspective view of a first end cap according to an exemplary embodiment of the present application.

Fig. 4 is a partial schematic block diagram of the first end cap of fig. 3.

Fig. 5 is a schematic view of the first end cap of fig. 3 from another perspective.

FIG. 6 is an exploded schematic view of a first end cap according to an exemplary embodiment of the present application.

Fig. 7 is a top schematic view of the first end cap of fig. 6.

FIG. 8 is a cross-sectional view of the first end cap of FIG. 7 taken along section line B-B.

FIG. 9 is an exploded view of another first endcap of an exemplary embodiment of the present application.

Fig. 10 is a cross-sectional schematic view of the first end cap of fig. 9.

FIG. 11 is an exploded view of another first endcap of an exemplary embodiment of the present application.

Fig. 12 is a cross-sectional schematic view of the first end cap of fig. 11.

FIG. 13 is an exploded view of yet another first endcap of an exemplary embodiment of the present application.

FIG. 14 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. 15 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. 16 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 100 according to an exemplary embodiment of the present application. The gas-liquid separator 100 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 16, 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. 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, and the mass accommodating cavity 201 is communicated with the interlayer space 202. The mass accommodating chamber 201 is provided with a gas-liquid separation assembly 11, and the related contents of the gas-liquid separation assembly 11 will be described in detail in the following embodiments, which will not be described herein.

The gas-liquid separator 100 includes a heat exchange assembly 20 disposed in a plenum 202. The heat exchange assembly 20 includes a collecting pipe 211 and a flat pipe 21 disposed at an end of the heat exchange assembly 20. 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 header 211 extends substantially in the axial direction r of the first cylinder 2. The end of the upper end of the header 211 is provided with a first joint 213. The interlayer space 202 is a channel of a first refrigerant, and the flat tube 21 is a channel of a second refrigerant. Optionally, the first refrigerant is a low-temperature refrigerant, and the second refrigerant is a high-temperature refrigerant.

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. I.e. the first end 101 is located above the second end 102.

Further, the gas-liquid separator 100 includes a first end cap 4 covering upper ends of the first cylinder 2 and the second cylinder 3. In some embodiments, the upper end of the second cylinder 3 is welded to the first end cap 4, and the upper end of the first cylinder 2 abuts against the first end cap 4. Correspondingly, the first end cap 4 is provided with a deflection channel 41 communicated with the inner cavity of the collecting main 211, and the deflection channel 41 penetrates through the upper and lower surfaces of the first end cap 4. The baffle passage 41 includes a first opening 4111 on the upper surface of the first cap 4 and a second opening 4121 on the lower surface of the first cap 4. Accordingly, at least a portion of the first joint 213 is disposed at the first opening 4111. The central axis of the first opening 4111 and the central axis of the second opening 4121 both extend in a substantially vertical direction, and are not in the same straight line, and the first opening 4111 is disposed closer to the center of the first end cap 4 than the second opening 4121. That is, the first opening 4111 is disposed inside the first end cap 4 with respect to the second opening 4121, so that the deflecting channel 41 is moved a distance inward in the bottom-to-top direction, which is beneficial for the disposition of the collecting main 211, especially for the disposition of the end device of the collecting main 211. I.e. the first end cap 4 has enough space to provide an end fitting of the header 211, such as the first joint 213 of the header or the like.

In some embodiments, baffle channel 41 includes a first section 411 extending downward a predetermined distance from first opening 4111, a second section 412 extending upward a predetermined distance from second opening 4121, and a third section 413 connecting first section 411 and second section 412. Accordingly, the first section 411 is offset from the second section 412, and the distance between the first section 411 and the center of the first end cap 4 is smaller than the distance between the second section 412 and the center of the first end cap 4. I.e. the first section 411 is closer to the centre of the first end cap 4 than the second section 412. Specifically, at least a portion of the first joint 213 is disposed at the first segment 411.

In some embodiments, the first end cap 4 includes a body portion 401 connected to the second cylinder 3 and a gland 402 disposed on a side of the body portion 401 remote from the second cylinder 3. The first section 411 penetrates the upper and lower surfaces of the gland 402. The third and

second sections

413 and 412 communicating with each other are provided in the body portion 401 and penetrate the upper and lower surfaces of the body portion 401. Wherein, in some embodiments, the body portion 401 and the gland 402 may be provided independently. Of course, in other embodiments, the body portion 401 and the gland 402 may be integrally formed.

In some embodiments, the third segment 413 is a slanted channel. The body 401 and the cover 402 are two independent members for example. Optionally, in some embodiments, the third segment 413 is provided with an inclined step surface 415 on a side near the center of the first end cap 4. The side of the gland 402 remote from the centre of the first end cap 4 is provided with a downwardly extending projection 416. In particular, during installation, the nose 416 extends at least partially into the third segment 413 and is disposed opposite the step surface 415. The inclined step surface 415 and nose 416 form inclined side walls of an inclined channel (see fig. 5-8).

Optionally, in other embodiments, two opposing plugs 414 may be disposed in the third segment 413. One of the plugs 414 is disposed on a side of the third section 413 close to the center of the first end cap 4, and the other plug 414 is disposed on a side of the third section 413 away from the first end cap 4. The two plugs 414 form the angled sidewalls of the angled channels (see also fig. 9 and 10). In some embodiments, the plug 414 may be connected to other components of the first end cap 4 by brazing, which may facilitate assembly of the gas-liquid separator 100. The inclined channel is formed by adding the plug 414, so that the process is simple and the production and the processing are easier.

In some embodiments, third segment 413 includes strip groove 4130, strip groove 4130 includes first groove portion 4131 and second groove portion 4132, and first groove portion 4131 is closer to the center of end cap 4 than second groove portion 4132. The first groove 4131 is in communication with the first segment 411 above the first groove 4132, and the second groove 4132 is in communication with the second segment 412 below the second groove (as shown in fig. 11 and 12). Specifically, the groove 4130 includes a bar-shaped opening 4133. The groove 4130 may be formed to extend a predetermined distance from the slit 4133 to a right lower side. The strip-shaped groove 4130 can be directly milled by groove milling equipment, and the process is simple and easy to operate.

Further, in some embodiments, a welding boss 217 corresponding to the second section 412 is disposed below the second section 412 (see fig. 13). The welding boss 217 is substantially annular, and the upper end of the header 211 is provided in the welding boss 217. The welding boss 217 may be integrally formed with the first end cap 4 or may be provided separately. The welding boss can effectively increase the welding area between the collecting pipe and the first end cover, thereby improving the welding strength, enabling the gas-liquid separator 100 to have higher bursting pressure, such as 40MPa, and improving the stability of the welding quality.

Specifically, in some embodiments, the body portion 401 of the first end cap 4 is substantially stepped. The main body 401 includes a first covering portion 4011 located at an upper portion for covering the second cylinder 3, and a second covering portion 4012 extending downward from an inner side of the first covering portion 4011 for covering the first cylinder 2. In addition, a notch is formed on the side of the second cover 4012 adjacent to the baffle channel 41, so that the body 401 has enough space to dispose the second section 412. Accordingly, the welding boss 417 may be connected to the body 401 by welding or the like. Of course, the welding boss 417 may be integrally formed with the body 401. The present application is not limited to this, and may be set according to a specific application environment.

Further, in some embodiments, the header 211 includes first and

second headers

2110, 2111 disposed side-by-side. One end of the flat pipe 21 is inserted into the first collecting pipe 2110, and the other end is inserted into 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. The first header 2110 has a first joint 213 at an upper end thereof and a second joint 212 at a lower end thereof. A new second refrigerant is introduced into the first header 2110 from one end of the first header 2110, and the heat-exchanged second refrigerant is extracted from the other end. Both ends of the second header 2111 are sealed. The first header 213 and the second header 212 described herein may be understood as end devices of a header. It should be noted that the header end fitting may also include other structures or components that can communicate with the header. This is not limited in this application.

In some embodiments, the flat tube 21 is formed by a plurality of flat tubes arranged in parallel along the same direction and wrapped on 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 arranged in parallel, and accordingly, the flat tubes are inserted into the header 211. The second refrigerant can flow in the same direction in the flat tube. Because the flat tubes 21 are arranged in the interlayer space 202. The second refrigerant flows in the flat tubes, and the heat of the second refrigerant is exchanged with the first refrigerant in the interlayer space 202 through the tube walls of the flat tubes.

Further, a heat sink 23 is provided in the interlayer space 202 to enhance heat exchange. In some embodiments, the flat tube 21 includes a heat sink 23 on a side facing the outer wall surface of the first cylinder 2. The heat sink 23 may be in contact with the outer wall surface of the first cylinder 2. The flat tube 21 is wrapped with a heat sink 23 on the side facing the inner wall surface of the second cylinder 3. The heat sink 23 can be in contact with the inner wall surface of the second cylinder 3. In other embodiments, the heat sink 23 is only enclosed on the side of the flat tube 21 facing the outer wall of the first cylinder 2. In still other embodiments, the heat sink 23 is included only on the side of the flat tube 21 facing the inner wall surface of the second cylinder 3. The heat sink 23 may be disposed by brazing or the like. The number and the arrangement mode of the heat dissipation pieces 23 are not limited, and the heat dissipation pieces can be arranged according to specific application environments.

In some embodiments, the heat dissipation member 23 is formed by sequentially connecting a plurality of sheet-shaped 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, in some embodiments, the first end cap 4 is provided with a first port 42 communicating with the mass storage chamber 201. Optionally, the first interface 42 may include a first segment 421 and a second segment 422 that form the first interface 42. The first section 421 is located on the body 401 and penetrates the upper and lower surfaces of the body 401, and the second section 422 is located on the cover 422 and penetrates the upper and lower surfaces of the cover 422 (refer to fig. 6, 9 and 11). The first port 42 may be provided with a first connection pipe 103 for introducing a first refrigerant into the mass accommodating cavity 201.

Further, in some embodiments, the interlayer space 202 is a cavity enclosed 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 includes a second end cap 5 covering the lower ends of the first cylinder 2 and the second cylinder 3. The second end cap 5 is also provided with a baffle passage 51 communicating with the lower end of the header 211. Specifically, at least a portion of the second connector 212 is installed in the outlet of the baffle passage 51 near the lower end.

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.

Further, in some embodiments, 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, 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.

In some embodiments, a channel 43 is provided in the first end cap 4, extending in a radial direction of the first end cap 4, and the upper end of the gas guide tube 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. Specifically, the through hole 43 may be disposed in the second covering portion 4012. The second cover 4012 is further provided with a manifold hole 44, and one or more through holes 43 are collected in the manifold hole 44. Accordingly, the upper end of the air duct 111 is inserted into the manifold hole 44, so that the space inside the air duct 111 of the channel 43 is communicated.

Specifically, when the gas-liquid separator 100 is operated, the flow direction of the first refrigerant is as shown in fig. 14. 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. 15. The second refrigerant enters the first chamber 2115 from the second joint 212 provided in the baffle passage 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 refrigerant flows out through the first joint 213 disposed in the baffle channel 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. The gas-liquid separator is characterized by comprising a first cylinder, a second cylinder sleeved outside the first cylinder at a preset distance, and a first end cover covering the upper ends of the first cylinder and the second cylinder; an interlayer space is formed between the first cylinder and the second cylinder;

2. The gas-liquid separator of claim 1, wherein the baffle channel comprises a first segment extending downwardly from the first opening, a second segment extending upwardly from the second opening, and a third segment communicating the first and second segments; the first section and the second section are arranged in a staggered mode, and the distance between the first section and the center of the first end cover is smaller than the distance between the second section and the center of the first end cover.

3. The gas-liquid separator of claim 2, wherein the first end cap comprises a body portion coupled to the second cylinder and a gland disposed on a side of the body portion distal from the second cylinder; the first section penetrates through the upper surface and the lower surface of the gland, and the third section and the second section are arranged on the body part and penetrate through the upper surface and the lower surface of the body part.

4. The gas-liquid separator of claim 3, wherein the third section is an inclined passage; wherein the content of the first and second substances,

5. The gas-liquid separator of claim 2, wherein the third segment comprises a strip groove comprising a first groove portion and a second groove portion, the first groove portion being closer to a center of the end cap than the second groove portion; wherein the first slot portion is in communication with the first segment and the second slot portion is in communication with the second segment.

6. The gas-liquid separator according to claim 2, wherein a welding boss corresponding to the second section is provided below the second section, and an upper end of the header pipe is provided in the welding boss.

7. The gas-liquid separator according to claim 1, wherein the collecting pipes comprise a first collecting pipe and a second collecting pipe which are arranged side by side, a flat pipe is further arranged between the first barrel and the second barrel, 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 heat exchanger comprises a first collecting pipe and a second collecting pipe, wherein a partition is arranged in the first collecting pipe, a first joint and a second joint are arranged at the end part of the first collecting pipe, and two ends of the second collecting pipe are sealed.

8. The gas-liquid separator according to claim 1, wherein said gas-liquid separator comprises a second end cap covering a lower end of said second cylinder, said second end cap being provided with a baffle passage communicating with another end of said header.

9. 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.

10. The gas-liquid separator of claim 9, wherein the first end cap is provided with a first port in communication with the mass containing cavity, and wherein the first end cap is provided with a channel extending in a radial direction of the first end cap, the channel communicating the mass containing cavity and the plenum space.

11. The gas-liquid separator according to claim 7, wherein heat radiating members are included in both a side of the flat tube facing the outer wall surface of the first cylinder and a side of the flat tube facing the inner wall surface of the second cylinder, and a part of the heat radiating members is in contact with the outer wall surface of the first cylinder and another part of the heat radiating members is in contact with the inner wall surface of the second cylinder.

12. 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 11 is arranged between the heat exchanger and the compressor.