阅读说明：本技术 气液分离装置 (Gas-liquid separator ) 是由 董军启 董海锋 于 2020-04-30 设计创作，主要内容包括：本申请公开了一种气液分离装置,换热组件包括螺旋盘绕第一筒体的换热管,换热管的一侧与第一筒体贴近或贴合,另一侧与第二筒体贴近或贴合,换热管包括第一流通通道、环绕第一流通通道的管壁以及自管壁凸伸出的第一延伸部,第一筒体、第二筒体及换热管之间形成第二流通通道,第一延伸部位于第二流通通道。本申请中换热管设有自管壁凸伸出的第一延伸部,第一延伸部位于第二流通通道,通过设置凸伸于管壁之外的第一延伸部,增加换热管与第二流通通道中流体的热交换面积,提升第一流通通道内的流体与第二流通通道内流体的热交换效果,从而提升气液分离装置的换热效果。(The application discloses gas-liquid separation device, heat exchange assembly include the heat exchange tube of spiral winding first barrel, one side and the first barrel of heat exchange tube are close to or are laminated, the opposite side is pressed close to or are laminated with the second barrel, the heat exchange tube includes first circulation passageway, encircle the pipe wall of first circulation passageway and stretch out the first extension from the pipe wall, form the second circulation passageway between first barrel, second barrel and the heat exchange tube, first extension is located the second circulation passageway. The heat exchange tube is provided with a first extending part protruding from the tube wall, the first extending part is located in the second circulation channel, the first extending part protruding out of the tube wall is arranged, the heat exchange area of fluid in the heat exchange tube and the second circulation channel is increased, the heat exchange effect of the fluid in the first circulation channel and the fluid in the second circulation channel is improved, and therefore the heat exchange effect of the gas-liquid separation device is improved.)

1. A gas-liquid separation apparatus, comprising: the device comprises a first cylinder (1), a second cylinder (2), a first flow guide part (3), a second flow guide part (4), a gas-liquid distribution assembly (5) and a heat exchange assembly (6);

the first cylinder (1) is positioned at the inner side of the second cylinder (2), the gas-liquid separation device is provided with a first cavity (10) and a second cavity (20) which are communicated in a fluid manner, the first cavity (10) is positioned in the second cylinder (2), the first cavity (10) is positioned outside the first cylinder (1), the second cavity (20) at least comprises a space positioned in the first cylinder (1), at least part of the heat exchange assembly (6) is positioned in the first cavity (10), and at least part of the gas-liquid distribution assembly (5) is positioned in the second cavity (20);

the first flow guide part (3) is fixedly arranged with the second cylinder (2), the gas-liquid distribution assembly (5) is fixedly arranged with the first flow guide part (3), the first flow guide part (3) is provided with a third cavity (30), the gas-liquid distribution assembly (5) is communicated with the second cavity (20) and the third cavity (30), and the third cavity (30) is fluidly communicated with the first cavity (10);

the second flow guide part (4) is fixedly arranged with the second cylinder (2), the first flow guide part (3) is positioned at one end of the second cylinder (2) in the axial direction, and the second flow guide part is positioned at the other end of the second cylinder (2) in the axial direction;

heat exchange assembly (6) are including spiral winding heat exchange tube (61) of first barrel (1), one side and first barrel (1) of heat exchange tube (61) are pressed close to or are laminated, the opposite side with second barrel (2) are pressed close to or are laminated, heat exchange tube (61) include first circulation passageway (40), encircle pipe wall (611) of first circulation passageway (40) and from first extension (612) that pipe wall (611) are protruding, first barrel (1) second barrel (2) reach form second circulation passageway (50) between heat exchange tube (61), first extension (612) are located second circulation passageway (50).

2. A gas-liquid separating apparatus according to claim 1, wherein the heat exchanging pipe (61) further comprises a projection projecting from a pipe wall, the projection being in contact with at least one of the first cylinder (1) and the second cylinder (2).

3. A gas-liquid separating apparatus according to claim 2, wherein the protruding portion includes a second extending portion (613) and a third extending portion (614), the third extending portion (614) extends from the pipe wall (611) in the direction of the first cylinder (1), a free end of the third extending portion (614) is adjacent to or attached to the first cylinder (1), the second extending portion (613) extends from the pipe wall (611) in the direction of the second cylinder (2), and a free end of the second extending portion (613) is adjacent to or attached to the second cylinder (2).

4. A gas-liquid separating device according to claim 2, wherein said projection is adjacent to or fitted to said first cylinder (1), and said tube wall (611) of said heat exchange tube (61) on the side opposite to said projection is adjacent to or fitted to said second cylinder (2); or, the bulge is attached to or attached to the second cylinder (2), and the pipe wall (611) on the side opposite to the bulge of the heat exchange pipe (61) is attached to or attached to the first cylinder (1).

5. A gas-liquid separating apparatus according to claim 1, wherein the first flow channel (40) and the second flow channel (50) are each spirally wound around the first cylinder (1), and when the gas-liquid separating apparatus is in an operating state, the fluid in the second flow channel (50) exchanges heat with the fluid in the first flow channel (40), and the flow direction of the fluid in the second flow channel (50) is opposite to the flow direction of the fluid in the first flow channel (40), or the flow direction of the fluid in the second flow channel (50) is the same as the flow direction of the fluid in the first flow channel (40).

6. A gas-liquid separating device according to claim 1, wherein the number of said first extensions (612) is at least one, and a free end of at least one of said first extensions (612) is in contact with said tube wall (611) of said heat exchange tube (61) or is adjacent to or in abutment with a free end of another of said first extensions (612).

7. A gas-liquid separating device according to claim 1, wherein said heat exchanging pipe (61) further comprises fourth extensions (615), said fourth extensions (615) projecting inwardly from said pipe wall (611), said fourth extensions (615) being located in said first flow-through channels (40), said fourth extensions (615) being at least one in number.

8. A gas-liquid separating apparatus according to claim 1, wherein the first guide portion (3) is provided with a first flow passage communicating the second chamber (20) and the outside of the gas-liquid separating apparatus, the second guide portion (4) is provided with a second flow passage communicating the first chamber (10) and the outside of the gas-liquid separating apparatus, one end of the heat exchange tube (61) is communicated with the first flow passage of the first guide portion (3), and the other end of the heat exchange tube (61) is communicated with the second flow passage of the second guide portion (4).

9. A gas-liquid separating apparatus according to claim 1, wherein the heat exchange unit (6) comprises a first pipe joint (62) connected to the first guide portion (3) and a second pipe joint (63) connected to the second guide portion (4), one end of the heat exchange pipe (61) is connected to the first pipe joint (62), the other end of the heat exchange pipe (61) is connected to the second pipe joint (63), an inner cavity of the first pipe joint (62) communicates an inner cavity of the heat exchange pipe (61) with the outside of the gas-liquid separating apparatus, and an inner cavity of the second pipe joint (63) communicates an inner cavity of the heat exchange pipe (61) with the outside of the gas-liquid separating apparatus.

10. A gas-liquid separating apparatus according to any one of claims 1 to 9, wherein the gas-liquid distributing member (5) comprises a flow guide tube (51) and a sleeve (52), the flow guide tube (51) is connected to the first flow guide portion (3), the flow guide tube (51) is at least partially positioned in the second chamber (20), one end of the flow guide tube (51) communicates with the third chamber (30), and the other end of the flow guide tube (51) communicates with the second chamber (20);

the sleeve (52) is sleeved outside the guide pipe (51), the sleeve (52) is connected with the guide pipe (51), one end, far away from the first flow guide part (3), of the guide pipe (51) is communicated with an inner cavity of the sleeve (52), and one end, close to the first flow guide part (3), of the sleeve (52) is communicated with the second cavity (20);

the sleeve (52) comprises a side wall and a bottom wall, the side wall is provided with at least one first hole (522) which radially penetrates through the side wall, the bottom wall is provided with at least one second hole (523) which axially penetrates through the bottom wall, the first hole (522) is communicated with the second cavity (20) and the inner cavity of the sleeve (52), and the second hole (523) is communicated with the second cavity (20) and the inner cavity of the sleeve (52).

Technical Field

The application relates to the field of air conditioner components, in particular to a gas-liquid separation device.

Background

In the air conditioning system, an intermediate heat exchanger is adopted to exchange heat between a high-temperature refrigerant from a condenser and a low-temperature refrigerant from an evaporator so as to increase the temperature of the refrigerant entering a compressor, and the temperature of the refrigerant before throttling can be reduced in a refrigeration mode, so that the refrigeration efficiency of the evaporator is improved. Most compressors can only compress gaseous refrigerant, and if liquid refrigerant enters the compressor, liquid impact can be caused, and the compressor can be damaged. To reduce the risk of liquid slugging of the compressor, a gas-liquid separator may be installed before the compressor.

In the correlation technique, adopt the gas-liquid separation device who collects heat transfer and gas-liquid separation function as an organic whole, gas-liquid separation device includes interior barrel, outer barrel and is located the intermediate layer chamber between barrel and the outer barrel, and the gas-liquid distribution subassembly is located the inboard of barrel, and heat exchange assembly is located the intermediate layer intracavity, and the refrigerant that gets into in the intermediate layer chamber carries out the heat exchange with heat exchange assembly, can reduce the refrigerant temperature that flows into the expansion valve under the refrigeration mode, improves the refrigeration effect to can further reduce compressor liquid hammer phenomenon. For the heat transfer route of refrigerant among the increase heat exchange assembly, the heat exchange tube spiral coils the interior barrel setting, and the refrigerant in the intermediate layer chamber is from last to supreme flowing down or from down, carries out the heat exchange with the refrigerant in the heat exchange tube, and the heat exchange tube is big with the refrigerant heat exchange area in the intermediate layer chamber more, and the heat transfer effect is better.

Disclosure of Invention

In view of the above-mentioned problem that the correlation technique exists, the application provides a better gas-liquid separation device of heat transfer effect.

In order to achieve the purpose, the following technical scheme is adopted in the application:

a gas-liquid separation device comprising: the gas-liquid heat exchanger comprises a first cylinder, a second cylinder, a first flow guide part, a second flow guide part, a gas-liquid distribution assembly and a heat exchange assembly; the first cylinder is positioned on the inner side of the second cylinder, the gas-liquid separation device is provided with a first cavity and a second cavity which are in fluid communication, the first cavity is positioned in the second cylinder, the first cavity is positioned outside the first cylinder, the second cavity at least comprises a space positioned in the first cylinder, at least part of the heat exchange assembly is positioned in the first cavity, and at least part of the gas-liquid distribution assembly is positioned in the second cavity; the first flow guide part is fixedly arranged with the second cylinder, the gas-liquid distribution assembly is fixedly arranged with the first flow guide part, the first flow guide part is provided with a third cavity, the gas-liquid distribution assembly is communicated with the second cavity and the third cavity, and the third cavity is communicated with the first cavity in a fluid manner; the second flow guide part is fixedly arranged with the second cylinder, the first flow guide part is positioned at one end of the second cylinder in the axial direction, and the second flow guide part is positioned at the other end of the second cylinder in the axial direction; the heat exchange assembly comprises a spiral coil and is wound on a heat exchange tube of the first barrel, one side of the heat exchange tube is close to or attached to the first barrel, the other side of the heat exchange tube is close to or attached to the second barrel, the heat exchange tube comprises a first circulation channel, a tube wall surrounding the first circulation channel and a first extending portion protruding from the tube wall, the first barrel is provided with a second circulation channel, the second barrel is provided with a second circulation channel, and the first extending portion is located in the second circulation channel.

Heat exchange assembly includes the heat exchange tube of spiral winding first barrel in this application, one side of heat exchange tube is pressed close to or is laminated with first barrel, the opposite side is pressed close to or is laminated with the second barrel, first barrel, form the second circulation passageway between second barrel and the heat exchange tube, the heat exchange tube is equipped with the first extension of protruding stretching out of the pipe wall, first extension is located the second circulation passageway, through protruding first extension outside the pipe wall that stretches out, increase the heat exchange area of fluid in heat exchange tube and the second circulation passageway, promote the fluid in the first circulation passageway and the interior fluidic heat exchange effect in second circulation passageway, thereby promote gas-liquid separation device's heat transfer effect.

Drawings

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

FIG. 2 is an exploded view of a portion of an embodiment of a gas-liquid separator according to the present application;

FIG. 3 is an exploded view of a portion of an embodiment of a gas-liquid separator according to the present application;

FIG. 4 is a schematic cross-sectional view of an embodiment of the gas-liquid separation apparatus of the present application;

fig. 5 is a partially enlarged view of a portion a shown in fig. 4;

FIG. 6 is a schematic cross-sectional perspective view of an embodiment of a gas-liquid separation apparatus of the present application;

FIG. 7 is a schematic perspective cross-sectional view of a heat exchange assembly of an embodiment of a gas-liquid separation device of the present application;

fig. 8 is a partially enlarged view of a portion B shown in fig. 7;

FIG. 9 is a schematic view of a first guide portion of an embodiment of the gas-liquid separation apparatus of the present application;

FIG. 10 is a schematic view of a second guide portion of an embodiment of the gas-liquid separation apparatus of the present application;

FIGS. 11A-11F are schematic cross-sectional views of various embodiments of heat exchange tubes of an embodiment of a gas-liquid separation device of the present application;

FIG. 12 is a schematic diagram of a connection of a thermal management system 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 application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, 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 application. As used in this application 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. Similarly, 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; "plurality" means two or more than two. Unless otherwise specified, "front," "back," "lower," and/or "upper" are used for ease of description only 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.

Hereinafter, a gas-liquid separation apparatus according to an exemplary embodiment of the present application will be described in detail with reference to the accompanying drawings. The features of the following examples and embodiments can be supplemented or combined with each other without conflict.

According to an embodiment of the gas-liquid separation device 100 of the present application, as shown in fig. 1 to 10, the gas-liquid separation device 100 includes a first cylinder 1, a second cylinder 2, a first flow guide portion 3, a second flow guide portion 4, a gas-liquid distribution assembly 5, and a heat exchange assembly 6.

In this embodiment, the first cylinder 1 includes a cylinder 11 and a bottom cover 12, and the cylinder 11 and the bottom cover 12 may be formed separately and then connected together, or may be formed integrally. The bottom cover 12 is disposed at one end of the barrel 11 near the second guide portion 4. The barrel part 11 of the first barrel 1 and the second barrel 2 are both hollow cylinders with approximately circular cross sections, the outer diameter of the barrel part 11 of the first barrel 1 is smaller than the inner diameter of the second barrel 2, and the first barrel 1 is located on the inner side of the second barrel 2.

The gas-liquid separation device 100 has a first chamber 10 and a second chamber 20 which are fluidly connected, the first chamber 10 is located in the second cylinder 2, the first chamber 10 is located outside the first cylinder 1, and the second chamber 20 at least includes a space located in the first cylinder 1. A second chamber 20 is formed in the first cylinder 1, and the gas-liquid distribution assembly 5 is at least partially located in the second chamber 20. The first cavity 10 is a cavity defined by the outer wall surface of the first cylinder 1 and the inner wall surface of the second cylinder 2, and at least part of the heat exchange assembly 6 is positioned in the first cavity 10.

The first flow guide part 3 and the second flow guide part 4 are respectively fixedly arranged with the second cylinder 2, one end face of the second cylinder 2 surrounds part of the first flow guide part 3, and the other end face of the second cylinder surrounds part of the second flow guide part 4. One end face of the first cylinder 1 opposite to the bottom cover 12 abuts against the first flow guide part 3, and the bottom cover 12 abuts against the second flow guide part 4. In some embodiments, the first flow guiding part 3 may be connected to the first cylinder 1 and the second cylinder 2, or may be abutted by a sealing structure; the second guide portion 4 may be connected to the first cylinder 1 and the second cylinder 2, or may be abutted by the sealing structure. The first guide portion 3 has a third chamber 30, the gas-liquid distribution assembly 5 is fixedly disposed on the first guide portion 3, the gas-liquid distribution assembly 5 is communicated with the second chamber 20, the third chamber 30 and the outside of the gas-liquid separation device 100, and the third chamber 30 is communicated with the first chamber 10.

In the present embodiment, as shown in fig. 3 and 9, the first flow guide portion 3 includes a first member 31 and a second member 32 which are arranged at an interval, and the first member 31 is connected to the second member 32. The projection of the first member 31 completely falls into the projection of the second member 32 along the axial direction of the gas-liquid separation device 100, the first member 31 is fixedly provided with the first cylinder 1, the second member 32 is fixedly provided with the second cylinder 2, and the third chamber 30 includes at least a space between the first member 31 and the second member 32. The first member 31 includes a first through hole 33 communicating with the third chamber 30 and a second through hole 34 communicating with the second chamber 20, and the second member 32 includes a third through hole 35 communicating with the outside of the gas-liquid separation device 100.

The projection of the first cylinder 1 falls entirely within the projection of the first member 31 in the axial direction of the gas-liquid separation device 100, and the outer contour shape of the first member 31 is substantially the same as the cross-sectional shape of the first cylinder 1.

The first member 31 includes a first end surface 311 distant from the first cylinder 1, a second end surface 312 opposite to the first end surface 311, and a first step surface 313, and the first step surface 313 divides the side wall surface of the first member 31 into two sections, i.e., a first side wall surface 314 and a second side wall surface 315. The first step surface 313 is connected to the first sidewall surface 314 in an extending manner and connected to the second sidewall surface 315 in an extending manner. The upper end surface of the first cylinder 1 abuts against the first step surface 313. In some embodiments, a portion of the inner wall surface of the first cylinder 1 is disposed in close contact with the second sidewall surface 315. The first through hole 33 and the second through hole 34 each form an opening at the first end surface 311 and the second end surface 312. The upper end surface of the first cylinder 1 is fixedly connected with the first member 31 by soldering or gluing. One end surface of the second member 32 close to the first member 31 is provided with a third through hole 35 penetrating the second member 32, and the third through hole 35 communicates the outside of the gas-liquid separation device 100 with the second chamber 20.

In some embodiments, referring to fig. 2 to 6 and fig. 9, the first end surface 311 of the first member 31 is provided with a first protruding portion 341, the first protruding portion 341 is disposed around the second through hole 34, an end of the first protruding portion 341 away from the first member 31 is at least partially received in the third through hole 35 of the second member 32, a part of an outer side wall of the first protruding portion 341 is connected to the second member 32, and an inner cavity of the first protruding portion 341 communicates the second through hole 34 and the third through hole 35, that is, the inner cavity of the first protruding portion 341 communicates the outside of the gas-liquid separation device 100 and the second chamber 20. On the one hand, the connection between the first member 31 and the second member 32 and the communication between the outside of the gas-liquid separation device 100 and the second chamber 20 can be realized, and on the other hand, the distance between the first member 31 and the second member 32 can be ensured, and a sufficient space is left for the third chamber 30. In some embodiments, referring to fig. 3 and 9, in order to further ensure the separation distance between the first member 31 and the second member 32, a support column 317 is provided on the first member 31 or the second member 32, and one end of the support column 317 abuts against the first member 31 and the other end abuts against the second member 32.

The second end face 312 of the first member 31 is provided with a second projecting portion 331, a third projecting portion 332, and a first groove portion 333 between the second projecting portion 331 and the third projecting portion 332, the second projecting portion 331 and the third projecting portion 332 are both disposed around the first through hole 33, and the third projecting portion 332 is disposed away from the first through hole 33 with respect to the second projecting portion 331.

The gas-liquid distribution assembly 5 includes a guide tube 51 and a first plate 53, the guide tube 51 and the first plate 53 are respectively fixed to the first component 31, and at least a portion of the guide tube 51 is located in the second chamber 20. One end of the draft tube 51 is accommodated in the second protruding portion 331, a part of the outer side wall of the draft tube 51 is connected to the inner side wall of the second protruding portion 331, and the inner cavity of the draft tube 51 is communicated with the first through hole 33, that is, the inner cavity of the draft tube 51 is communicated with the third cavity 30. The first plate 53 is partially received between the second and third projecting portions 331 and 332, i.e., received in the first groove portion 333, to achieve fixation of the first plate 53.

In this embodiment, referring to fig. 4, the second flow guiding portion 4 covers an end of the second cylinder 2 away from the first flow guiding portion 3. The projection of the second guide 4 falls entirely into the projection of the second cylinder 2 in the axial direction of the gas-liquid separation device 100.

The second diversion part 4 has a fourth through hole 41 communicating the outside of the gas-liquid separation device 100 with the first chamber 10, and along the axial direction of the gas-liquid separation device 100, the fourth through hole 41 is divided into two sections, referring to fig. 6, a section far away from the first chamber 10 is a first section in a substantially straight cylindrical shape, a section near the first chamber 10 is a second section in a substantially horn shape, the size of the outline of the cross section of one end of the second section is the same as that of the cross section of the first section, and the size of the outline of the cross section of the other end of the second section is larger than that of the cross section of the first section, so that the resistance when the fluid in the first chamber 10 enters the fourth through hole 41 is reduced.

The bottom cover 12 of the first cylinder 1 is provided with a first supporting member 121 abutted between the first cylinder 1 and the second flow guiding portion 4, in this embodiment, as shown in fig. 3, 4 and 6, the first supporting member 121 is a substantially straight cylinder, and the second flow guiding portion 4 is provided with a second groove portion 43 for accommodating the first supporting member 121, so as to increase the stability of the first cylinder 1. In other embodiments, the first supporting member 121 may be disposed at the second diversion part 4, and the bottom cover 12 of the first cylinder 1 is provided with a groove part for accommodating the first supporting frame end member 121.

In this embodiment, during installation, an end surface of one end of the first cylinder 1 opposite to the bottom cover 12 abuts against the first step surface 313, a part of an inner wall surface of the first cylinder 1 is connected to the second side wall surface 315 to realize sealing of the first cylinder 1, and the first supporting member 121 of the bottom cover 12 of the first cylinder 1 is limited by the second groove portion 43 of the second diversion portion 4; part of the inner wall surface of one end of the second cylinder 2 is connected to part of the outer side wall surface of the second member 32, and part of the inner wall surface of the other end of the second cylinder 2 is connected to part of the outer side wall surface of the second guide part 4, so that the second cylinder 2 is sealed. Alternatively, the connection mode between the second cylinder 2 and the first flow guide part 3 and the second flow guide part 4 may be electromagnetic pulse welding.

In the present embodiment, referring to fig. 4 to 6, the gas-liquid distribution assembly 5 includes a flow guide pipe 51, a sleeve 52 and a first plate 53. The sleeve 52 is sleeved outside the guide tube 51, the first plate 53 has a through hole, one end of the guide tube 51 passes through the through hole to enable the first plate 53 to be sleeved on the upper portion of the guide tube 51, and the first plate 53 is located above the sleeve 52. The periphery of the through hole of the first plate 53 extends towards the first flow guiding portion 3 to form a fourth protruding portion 533, the fourth protruding portion 533 is accommodated in the first groove portion 333, the inner sidewall of the fourth protruding portion 533 is attached to the outer sidewall of the second protruding portion 331, and the outer sidewall of the fourth protruding portion 533 is attached to the inner sidewall of the third protruding portion 332, so that the first plate 53 is fixed. One end of the duct 51 is received in the second boss 331 after passing through the through hole of the first plate 53, and the end surface thereof abuts against the first member 31.

The first plate 53 includes a main body portion 531 and an outer extension portion 532 extending downward along an outer edge of the main body portion 531. A gap is formed between the upper surface of the main body 531 and the first member 31, so that the first fluid can flow into the second chamber 20 from the second through hole 34. A gap is formed between the outer wall surface of the outer extension portion 532 and the inner wall surface of the first cylinder 1, so that the first fluid continues to flow downwards after entering the second chamber 20 from the second through hole 34. A gap is provided between the lower surface of the main body portion 531 and the upper end surface of the sleeve 52, a gap is provided between the inner wall surface of the outer extension portion 532 and the outer wall of the sleeve 52, and one end of the sleeve 52 close to the first plate 53 is opened to communicate the second chamber 20 with the inner cavity of the sleeve 52. The diameter of the main body 531 is smaller than the inner diameter of the first cylinder 1 and larger than the outer diameter of the sleeve 52.

The inner wall surface of the sleeve 52 is spaced from the outer wall surface of the draft tube 51 by a predetermined distance so that a third flow passage 60 through which the first fluid flows is formed between the inner wall surface of the sleeve 52 and the outer wall surface of the draft tube 51. The end of the cannula 52 remote from the first plate 53 is sealed so that the lumen of the cannula 52 is isolated from the second lumen 20 at the end remote from the first plate 53. A gap is left between the inner wall surface of the lower end of the draft tube 51 and the lower end surface of the sleeve 52 to communicate the third flow passage 60 with the inner cavity of the draft tube 51.

In the present embodiment, the sleeve 52 and the delivery tube 51 are both hollow cylinders with a generally circular cross-section. The draft tube 51 has one end connected to the first member 31 and communicated with the third chamber 30, and the other end opened and communicated with the third flow passage 60. One end of the sleeve 52 close to the second flow guiding part 4 is self-sealed, and the other end is open and communicated with the second cavity 20. The inner side wall of the sleeve 52 near one end of the second flow guiding part 4 is provided with a limiting structure 521, and the end of the flow guiding pipe 51 extends into the limiting structure 521, so that the fixed sleeve 52 and the flow guiding pipe 51 can be used for limiting the displacement of the sleeve 52, but the design of the limiting structure 521 does not influence the flow of the first fluid, and referring to fig. 4 and 6, the limiting structure 521 is three protrusions uniformly distributed along the circumferential direction of the inner wall of the sleeve 52 (refer to fig. 4 and 6).

In some embodiments, the sleeve 52 can be fixed only by the limiting structure 521, the sleeve 52 can be fixed by connecting the sleeve 52 with the first plate 53, and the sleeve 52 can be fixed by connecting the sleeve 52 with the bottom cover 12.

In some embodiments, the side wall of the draft tube 51 near the end of the first member 31 is opened with at least one balance hole 511 communicating the third flow channel 60 and the inner cavity of the draft tube 51, and the balance hole 511 is used for reducing the phenomenon that the liquid first fluid is sucked into the compressor 300 due to the pressure difference when the compressor 300 is stopped.

The gas-liquid separator 100 is further provided with a filter member 71, and the filter member 71 is fixed to an end of the sleeve 52 adjacent to the bottom cover 12. The filter assembly 71 includes a filter net 712 and a bracket 711, and the bracket 711 is abutted between the sleeve 52 and the bottom cover 12 for fixing the filter net 712 and limiting the sleeve 52 to reduce the shaking of the gas-liquid distribution assembly 5. The bottom cover 12 may further have a boss or a groove engaged with the bracket 711, and one end of the bracket 711 is sleeved on the outer side of the boss or inserted into the groove. In some embodiments, the filter mesh 712 and the frame 711 may be formed separately and then secured together, or may be integrally formed, such as by plastic injection molding.

The sleeve 52 is provided with at least one through hole for guiding the refrigerant oil in the second chamber 20 into the inner cavity of the flow guide tube 51, so that the refrigerant oil flows to the compressor 300 along with the first fluid, and the diameter and arrangement of the through hole are matched according to the capacity of the heat management system, so that the ratio of the refrigerant oil returning to the compressor 300 to the first fluid is better. The sleeve 52 comprises a bottom wall and a side wall, the bottom wall of the sleeve 52 is provided with at least one first hole 522 which axially penetrates, and the fluid entering the first hole 522 is filtered by the filter screen 712, so that impurities can be prevented from entering the compressor 300 through the first hole 522; the side wall of the sleeve 52 is provided with at least one second hole 523 penetrating in the radial direction, and taking three second holes 523 as an example, two adjacent second holes 523 are provided at an interval, and the arrangement direction of the second holes 523 is substantially parallel to the axial direction of the gas-liquid separation device 100.

When the thermal management system is in the cooling mode, a relatively large amount of refrigerant is used for circulation in the system, a small amount of liquid refrigerant is stored in the gas-liquid separation device 100, the liquid level in the corresponding second chamber 20 is low, and the density of the refrigerant oil in the gas-liquid separation device 100 in the cooling mode is higher than that of the liquid refrigerant, at this time, the refrigerant oil is mainly guided to enter the draft tube 51 through the first hole 522 arranged on the bottom wall, the first hole 522 plays a larger role, and certainly, the second hole 523 may also guide a part of the first fluid to enter the third flow channel 50, so that the first fluid flows into the draft tube 51, the refrigerant oil and the first fluid have a certain intersolubility, the refrigerant oil is mixed in the first fluid, and a part of the refrigerant oil can also be guided to enter the draft tube 51, and because the hole diameters of the first hole 522 and the second hole 523 are both small, the first fluid guided through the second hole 523 is small, the effect of gas-liquid separation is less influenced. When the thermal management system is in a heating mode, relatively few refrigerants used for circulation in the system are used, more liquid refrigerants are stored in the gas-liquid separation device 100, the liquid level height in the corresponding second cavity 20 is high, the density of the refrigeration oil in the gas-liquid separation device 100 in the heating mode is smaller than that of the liquid first fluid, at the moment, the refrigeration oil is mainly guided to enter the guide pipe 51 through the second hole 523 arranged on the side wall, the function of the second hole 523 is larger, the same principle is adopted, at the moment, the first hole 522 can also guide part of the first fluid to enter the guide pipe 51, and the effect of gas-liquid separation is less influenced due to the small hole diameter and the mutual solubility of the refrigeration oil and the first fluid. Because the height of the liquid first fluid in the first cylinder 1 changes along with the change of the working state of the thermal management system, at least two second holes 523 are arranged along the axial direction of the gas-liquid separation device, and when the refrigeration oil floats on the liquid first fluid, the purpose of guiding the refrigeration oil to enter the guide pipe 51 under different working states can be realized.

The reason why the sleeve 52 is provided with the first hole 522 and the second hole 523 is that the refrigerant oil in the second chamber 20 can be introduced into the inner cavity of the draft tube 51 in the heating mode, the cooling mode or other modes.

In some embodiments, when there are at least two second holes 523, the at least two second holes 523 are arranged in a straight line, and the extending direction of the straight line is parallel to the axial direction of the gas-liquid separation device 100. In some other embodiments, the at least two second holes 523 are not arranged in a straight line, and two adjacent second holes 523 are spaced apart from each other in a direction parallel to the axial direction of the gas-liquid separation device 100.

In some other embodiments, the sleeve 52 may be sealingly secured to the bottom cap 12 at one end and be open at the other end. The sleeve 52 may also be fixed to the bottom cover 12 at one end and fixed to the first plate 53 at the other end, but the end of the sleeve 52 close to the first plate 53 is provided with an opening, which communicates the inner cavity of the sleeve 52 with the second cavity 20. The sleeve 52 may also be sealed to itself at one end but secured to or connected to the bottom cover 12 and open or connected to the first plate 53 at the other end, but the interior cavity of the sleeve 52 communicates with the second chamber 20 at the end adjacent the first plate 53. The sleeve 52 may also be fixed to the first plate 53 at one end and sealed to itself without contacting the bottom cover 12 at the other end, with the inner cavity of the sleeve 52 communicating with the second chamber 20 at the end adjacent to the first plate 53.

When the gas-liquid separator 100 is operated, the flow direction of the first fluid is as follows: the first fluid flows into the second chamber 20 through the inner cavity of the first protrusion 341 and the second through hole 34 from the third through hole 35, continues to flow downward from the gap between the outer wall 532 and the inner wall of the first cylinder 1, then flows through the gap between the inner wall of the outer wall 532 and the outer wall of the sleeve 52, and the gap between the lower surface of the main body 531 and the upper end surface of the sleeve 52 in this order, enters the third flow passage 60 from the upper end of the sleeve 52, and continues to flow downward in the third flow passage 60. The first fluid then enters the draft tube 51 from the lower end of the draft tube 51 and continues to flow upward in the draft tube 51. The first fluid then enters the third chamber 30 from the first through hole 33, enters the first chamber 10 from the gap between the first member 31 and the second member 32, and continues to flow downward. Finally, the first fluid flows out of the gas-liquid separation device 100 through the fourth through hole 41 of the second guide portion 4 to enter the compressor 300. At this point, the first fluid completes the whole flow of gas-liquid separation and heat exchange. Wherein the first fluid exchanges heat with the heat exchange assembly 6 during flowing in the first cavity 10.

It should be noted that the first fluid entering the second chamber 20 from the first guide portion 3 is generally a gas-liquid mixed first fluid. After entering the second chamber 20, the liquid first fluid sinks due to gravity, so that the liquid first fluid is stored in the first cylinder 1, and the gaseous first fluid floats up, and enters the third flow channel 60 from the upper end of the sleeve 52 under the suction action of the compressor 300, so that the liquid first fluid is retained at the bottom of the first cylinder 1, and the gaseous first fluid flows through the third chamber 30 and the first chamber 10, and then flows out of the gas-liquid separation device 100 from the second diversion part 4, so as to realize gas-liquid separation of the first fluid.

In this embodiment, the gas-liquid separation device 100 includes a heat exchange assembly 6 at least partially disposed in the first chamber 10, and the heat exchange assembly 6 includes a heat exchange tube 61, a first tube joint 62 and a second tube joint 63. The heat exchange tube 61 includes a first end 616 partially received by the first tube connector 62 and a second end 617 partially received by the second tube connector 63.

The second member 32 of the first guide part 3 includes a fifth through hole 36 for communicating the outside of the gas-liquid separation device 100 with the heat exchange module 6, the first pipe joint 62 is fixedly connected with the second member 32, at least a part of the first pipe joint 62 is accommodated in the fifth through hole 36, and the inner cavity of the first pipe joint 62 communicates the outside of the gas-liquid separation device 100 with the inner cavity of the heat exchange pipe 61. The second guiding part 4 comprises a sixth through hole 42 for connecting the outside of the ventilation-liquid separation device 100 and the heat exchange assembly 6, a second pipe joint 63 is fixedly connected with the second guiding part 4, at least part of the second pipe joint 63 is accommodated in the sixth through hole 42, and the inner cavity of the second pipe joint 63 is communicated with the outside of the ventilation-liquid separation device 100 and the inner cavity of the heat exchange pipe 61. In some other embodiments, the first end portion 616 is at least partially received in the fifth through hole 36, the first end portion 616 is directly and fixedly connected to the first flow guiding portion 3, the second end portion 617 is at least partially received in the sixth through hole 42, and the second end portion 617 is directly and fixedly connected to the second flow guiding portion 4.

In the present embodiment, at least a part of the cylinder portion 11 of the first cylinder 1 is recessed in a direction away from the second cylinder 2 to form a first recess 111 and a second recess 112, and the first recess 111 and the second recess 112 are spaced apart from each other. A portion of the heat exchange tube 61 adjacent to the first flow guide 3 is received in the first recess 111, and a portion of the heat exchange tube 61 adjacent to the second flow guide 4 is received in the second recess 112. A first escape portion 316 is provided at a portion of the first member 31 corresponding to the first recess 111 in the axial direction of the gas-liquid separation device 100 to facilitate connection and assembly of the heat exchange tube 61 and the second member 32. Since the first plate 53 is disposed in the first cylinder 1 at a position close to the first flow guide portion 3, the first plate 53 is provided with a second escape portion 534 corresponding to the first recess 111 to facilitate the assembly of the first plate 53. Alternatively, the first recess 111 and the second recess 112 may be provided in communication. In order to facilitate the connection and assembly of the heat exchange tube 61 and the second flow guiding part 4, the bottom cover 12 may also be provided with an avoiding part, so as to reduce the bending of the heat exchange tube 61 and reduce the flow resistance of the second medium.

In this embodiment, the heat exchange tube 61 is spirally wound around the first cylinder 1, one side of the heat exchange tube 61 contacts the first cylinder 1, and the other side contacts the second cylinder 2. The first cylinder 1, the second cylinder 2 and the heat exchange tube 61 cooperate to form a second flow channel 50, and the second flow channel 50 is located in the first chamber 10. Because the pipe wall 611 on one side of the heat exchange pipe 61 is attached to the first cylinder 1, the third extending portion 614 on the opposite side is attached to the second cylinder 2, the heat exchange pipe 61 is spirally wound around the first cylinder 1, the first circulation channel 40 and the second circulation channel 50 are both spirally wound around the first cylinder 1, that is, the first circulation channel 40 and the second circulation channel 50 are both spiral circulation channels. When the gas-liquid separation device 100 is in an operating state, the second fluid in the first flow channel 40 exchanges heat with the first fluid in the second flow channel 50, and the first flow channel 40 and the second flow channel 50 are both spiral flow channels, which are longer than straight flow channels and more sufficient in heat exchange.

In the present embodiment, the heat exchange tube 61 includes the first flow channel 40, the tube wall 611 surrounding the first flow channel 40, and the first extension portion 612 protruding outward from the tube wall 611, the first extension portion 612 is located in the second flow channel 50, and the cross-sectional shape of the first extension portion 612 is substantially elongated. The first extension portion 612 is located in the second flow channel 50, and can play a role in increasing the heat exchange area between the heat exchange tube 61 and the first fluid, and improve the heat exchange effect between the second fluid and the first fluid, so as to improve the heat exchange effect of the gas-liquid separation device, and on the other hand, the first extension portion can also play a role in disturbing the flow path of the first fluid, so as to further enhance the heat exchange effect between the first fluid and the second fluid.

The number of the first extensions 612 is at least one. In some embodiments, the first extension 612 extends in a direction parallel to the axial direction. In some other embodiments, the direction of extension of the first extension 612 intersects the axial direction. Referring to fig. 11A to 11F, the number of the first extending portions 612 is plural, and the lengths of the plural first extending portions 612 may be all equal, may not be all equal, or may not be partially equal; the extending directions of the plurality of first extending portions 612 may all be parallel to the axial direction, may all intersect with the axial direction, or may partially intersect with the axial direction parallel to the axial direction. In some other embodiments, the cross-section of the first extension 612 includes, but is not limited to, an elongated shape, and may also be a corrugated shape, a perforated shape, or a structure with protrusions or grooves, as long as the function of turbulence is achieved, and the present application is not limited thereto.

In some other embodiments, the first extension 612 may also contact the tube wall 611 or the free end of another first extension 612 in the axial direction, and the second flow-through channel 50 is further arranged in different areas, so as to further increase the heat exchange effect between the first fluid and the second fluid. The height of the second flow channel 50 in the axial direction may be limited by the length of the first extension 612, or may be limited in other ways.

The heat exchange tube 61 further comprises a second extension part 613 protruding from the tube wall 611 to the second cylinder 2, the free end of the second extension part 613 contacts with the inner side wall of the second cylinder 2, and the tube wall 611 of the heat exchange tube 61 on the side opposite to the second extension part 613 contacts with the first cylinder 1. Optionally, a pipe wall 611 of the heat exchange pipe 61 on a side opposite to the second extending portion 613 is a planar structure (see fig. 8), the planar structure is attached to the outer side wall of the first cylinder 1, the heat exchange pipe 61 is in surface-to-surface contact with the first cylinder 1, and compared with a line-to-line contact manner, the contact area is larger, and the contact is firmer. The cross section of the second extending portion 613 is substantially elongated, and an end surface of one end of the second extending portion 613, which is far away from the tube wall 611, is a plane, so as to increase a contact area between the second extending portion 613 and the second cylinder 2. In some other embodiments, the cross-section of the second extending portion 613 includes, but is not limited to, an elongated shape, and may also be a corrugated shape, a perforated shape, or a structure with a protrusion or a groove, as long as the fit of the second extending portion 613 and the second cylinder is not affected, and the present application is not limited thereto.

The second extending portion 613 protruding out of the tube wall 611 is disposed to contact the second cylinder 2, so that the number of the first extending portions 612 disposed on the tube wall 611 can be increased compared with the case that the tube wall 611 directly contacts the second cylinder 2, and the heat exchange area between the heat exchange tube 61 and the first fluid is further increased.

In order to further increase the heat exchange effect between the first fluid and the second fluid, the heat exchange tube 61 may further include a fourth extension portion 615 protruding inward from the tube wall 611, the fourth extension portion 615 is disposed in the first flow channel 40, and the cross-sectional shape of the fourth extension portion 615 is substantially elongated. The fourth extension 615 is located in the first circulation channel 40 and functions to disturb the flow path of the second fluid, thereby enhancing the heat exchange effect between the first fluid and the second fluid.

The number of the fourth extensions 615 is at least one. In some embodiments, the direction of extension of the fourth extension 615 is parallel to the axial direction. In some embodiments, the direction of extension of the fourth extension 615 intersects the axial direction, e.g., is perpendicular to the axial direction. Referring to fig. 11A to 11C, the number of the fourth extending portions 615 is multiple, and the lengths of the multiple fourth extending portions 615 may be all equal, may not be all equal, or may not be partially equal; the extending directions of the plurality of fourth extending portions 615 may be all parallel to the axial direction, may all intersect the axial direction, or may be partially parallel to the axial direction and partially intersect the axial direction. In some other embodiments, the cross section of the fourth extension 615 includes but is not limited to an elongated shape, for example, the cross section of the fourth extension 615 may also have an arc convex shape as shown in fig. 11B, a concave portion 618 is further disposed between two adjacent fourth extensions 615, and both the fourth extensions 615 and the concave portions 618 may play a role in disturbing flow, and of course, when the cross section of the fourth extension 615 is substantially elongated, the concave portion 618 may also be disposed to increase the effect of disturbing flow. In addition, the fourth extension portion 615 may also have a corrugated shape, a structure with holes or protrusions or grooves, as long as it can play a role of turbulence, and the application is not limited thereto.

In some other embodiments, referring to fig. 11D to 11F, the heat exchange tube 61 further includes a third extension 614 protruding from the tube wall 611 to the second cylinder 2, a free end of the third extension 614 contacts with the outer sidewall of the first cylinder 1, the tube wall 611 of the heat exchange tube 61 on the side opposite to the third extension 614 contacts with the second cylinder 2 or a second extension 613 on the side of the heat exchange tube 61 opposite to the third extension 614 contacts with the second cylinder 2. If the tube wall 611 on the side of the heat exchange tube 61 opposite to the third extending portion 614 is in contact with the second cylinder 2, optionally, the tube wall 611 on the side of the heat exchange tube 61 opposite to the third extending portion 614 is a planar structure (see fig. 8), the planar structure is attached to the inner side wall of the second cylinder 2, the heat exchange tube 61 is in contact with the second cylinder 2 in a surface-to-surface manner, and compared with a line-to-line contact manner, the contact area is larger, and the contact is firmer. The cross section of the third extending portion 614 is substantially elongated, and the end surface of one end of the third extending portion 614 away from the tube wall 611 is a plane, so that the contact area between the third extending portion 614 and the first barrel 1 is increased. By providing the third extension portion 614, the number of the first extension portions 612 provided on the tube wall 611 can be further increased, and the heat exchange area of the heat exchange tube 61 with the first fluid can be further increased.

In some other embodiments, the heat exchange tube 61 may not be provided with the fourth extension portion 615, and the cross-sectional shape of the first flow channel 40 may include, but is not limited to, a circle, a kidney, a gear, or a special shape without affecting the flow of the second fluid, which is not limited in the present application.

In this embodiment, the first extension 612, the second extension 613, the third extension 614 and the fourth extension 615 are integrally formed with the tube wall 611, so as to simplify the manufacturing and assembling process of the heat exchange assembly 6. After the heat exchange tube 61 is spirally wound around the first cylinder 1 and fixed, the tube wall 611, the third extension 614, the second extension 613, the first extension 612 and the fourth extension 615 are assembled, so that the first circulation channel 40 and the second circulation channel 50 spirally wound around the first cylinder 1 can be automatically formed.

Regarding the "contact" in the present application, the contact may be not complete contact or only very close to without contact due to manufacturing process errors, and most of the first fluid is guided to flow in the second flow channel 50, only a small part of the first fluid flows through the gap between one side of the heat exchange tube 61 and the first cylinder 1, or the gap between the other side and the second cylinder 2, for example, one side of the heat exchange tube 61 is not complete contact or only very close to without contact with the first cylinder 1, and the other side is not complete contact or only very close to without contact with the second cylinder 2, without affecting the purpose of increasing the heat exchange area of the heat exchange tube 61 and the first fluid, and the present application is not limited.

When the gas-liquid separation device 100 is operated, the flow direction of the second fluid in the refrigeration mode is as follows: the second fluid flows into the first flow channel 40 of the heat exchange tube 61 from the sixth through hole 42 through the second pipe joint 63, flows along the spiral first flow channel 40 to the first pipe joint 62, and finally flows out of the gas-liquid separation device 100 from the fifth through hole 36; the flow direction of the second fluid in the heating mode is as follows: the second fluid flows into the first flow channel 40 of the heat exchange tube 61 from the fifth through hole 36 through the first pipe joint 62, flows along the spiral-shaped first flow channel 40 to the second pipe joint 63, and finally flows out of the gas-liquid separation device 100 from the sixth through hole 42. So far, the second fluid completes the whole process of heat exchange. Wherein the second fluid flowing in the first flow channel 40 exchanges heat with the first fluid flowing in the second flow channel 50 in the first chamber 10.

In this embodiment, in the cooling mode, along the view angle from the first flow guiding part 3 to the second flow guiding part 4, the first fluid spirally flows along the clockwise direction, the second fluid spirally flows along the counterclockwise direction, and the first fluid and the second fluid exchange heat in the reverse direction; in the heating mode, the first fluid and the second fluid both spirally flow in the clockwise direction along the view angle from the first flow guide part 3 to the second flow guide part 4, and the first fluid and the second fluid exchange heat in the same direction. Optionally, under the same structure, the heat exchange effect of the reverse heat exchange is better compared with the effect of the same-direction heat exchange.

In some other embodiments, in the cooling mode, when the first flow guide portion 3 faces the second flow guide portion 4, the first fluid and the second fluid both spirally flow in a clockwise direction, that is, the second fluid flows in from the fifth through hole 36 and flows out from the sixth through hole 42; in contrast, in the heating mode, the first fluid spirally flows in a clockwise direction and the second fluid spirally flows in a counterclockwise direction along the view from the first flow guide part 3 to the second flow guide part 4, that is, the second fluid flows in from the sixth through hole 42 and flows out from the fifth through hole 36.

Referring to fig. 3, 4 and 6, a filtering device 72 is disposed between the first cylinder 1 and the second guiding portion 4, one end of the filtering device 72 abuts against the first cylinder 1, and the other end abuts against the second guiding portion 4. The filter device 72 is disposed coaxially with the body portion 11 of the first cylinder 1, and in order to facilitate the assembly and connection of the heat exchange tube 61 and the second guiding portion 4, the filter device 72 is provided with a third avoiding portion 721 disposed corresponding to the second concave portion 112. The filtering device 72 is used for filtering the impurities in the first fluid and preventing the impurities from entering the compressor 300 through the fourth through hole 41. The material of the filtering device 72 may be a metal material or a non-metal material, and the filtering device may perform a filtering function.

Fig. 12 is a schematic connection diagram of a thermal management system according to an exemplary embodiment of the present application, where the direction of the arrows is the refrigerant flow direction and the thermal management system is in a cooling mode. Referring to fig. 12, a thermal management system includes a gas-liquid separation device 100, an evaporator 200, a compressor 300, a condenser 400, and a throttling device 500. The evaporator 200 is communicated with the gas-liquid distribution module 5 through the first guide portion 3 of the gas-liquid separation device 100, the outlet of the evaporator 200 is communicated with the third through hole 35, the compressor 300 is communicated with the gas-liquid distribution module 5 through the second guide portion 4 of the gas-liquid separation device 100, and the inlet of the compressor 300 is communicated with the fourth through hole 41. The condenser 400 is communicated with the heat exchange assembly 6 through the second guide portion 4 of the gas-liquid separation device 100, the outlet of the condenser 400 is communicated with the sixth through hole 42, the throttling device 500 is communicated with the heat exchange assembly 6 through the first guide portion 3 of the gas-liquid separation device 100, and the inlet of the throttling device 500 is communicated with the fifth through hole 36. In the refrigeration mode, a high-temperature gaseous refrigerant flowing out of the compressor 300 exchanges heat through the condenser 400, flows through the heat exchange assembly 6 in the gas-liquid separation device 100, is throttled by the throttling device 500, enters the evaporator 200 for heat exchange, a gas-liquid two-phase refrigerant flowing out of the evaporator 200 enters the gas-liquid separation device 100, is subjected to gas-liquid separation by the gas-liquid separation device 100, and then flows into the compressor 300, so that a heat exchange cycle is completed. In the gas-liquid separation device 100, under the action of the gas-liquid distribution assembly 5, the liquid refrigerant is stored in the first cylinder 1, the gaseous refrigerant exchanges heat with the heat exchange assembly 6, the temperature of the gaseous refrigerant rises after heat exchange, and the temperature of the refrigerant flowing in the heat exchange assembly 6 decreases, so that the temperature of the refrigerant entering the compressor 300 rises, and the temperature of the refrigerant flowing into the throttling device 500 decreases, thereby improving the refrigeration effect of the evaporator 200.

In the heating mode, a high-temperature gaseous refrigerant flowing out of the compressor 300 enters the condenser 400 for heat exchange, is throttled by the throttling device 500 and then flows through the heat exchange assembly 6 in the gas-liquid separation device 100, then enters the evaporator 200 for heat exchange, a gas-liquid two-phase refrigerant flowing out of the evaporator 200 enters the gas-liquid separation device 100, and after gas-liquid separation of the gas-liquid separation device 100, the gaseous refrigerant flows into the compressor 300 to complete one heat exchange cycle.

Because first circulation passageway 40 and second circulation passageway 50 all are the heliciform setting, the heat transfer route of first fluid and second fluid is longer relatively, and the heat exchange is more abundant to make the heat transfer effect between the two better.

It should be understood that the first fluid and the second fluid are both refrigerants, the first fluid is a refrigerant flowing out of the evaporator 200, and the second fluid is a refrigerant flowing out of the condenser 400 or flowing out of the throttling device 500.

As used herein, "substantially" and "approximately" mean that the degree of similarity is greater than 50%. For example, the first cylinder 1 is approximately cylindrical, which means that the first cylinder 1 is hollow and cylindrical, the side wall of the first cylinder 1 may be provided with a concave part or a convex structure, and the cross section of the first cylinder 1 has a profile which is not circular, but 50% of the profile is formed by an arc line.

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 as defined by the appended claims.