Gas-liquid separator and thermal management system

Abstract

The present application discloses a gas-liquid separator, wherein the first cylinder is located inside the second cylinder, and the gas-liquid separator has a first cavity, which is located inside the second cylinder and outside the first cylinder; a first manifold extending in a direction parallel to the axis of the first cylinder is located between the first cylinder and the second cylinder, and at least part of the side wall of the first cylinder is recessed inward to form a first recess, and the first manifold is arranged corresponding to the first recess; on a first plane perpendicular to the axis of the first cylinder, the projection of the first recess is U-shaped, and the projection of the first manifold is at least partially accommodated in the U-shaped space of the projection of the first recess. In the present application, when the diameter of the second cylinder remains unchanged, other parts of the first cylinder can be closer to the second cylinder, so that the volume of the first cylinder is large enough, which has little effect on the heat exchange performance of the heat exchange component, and makes the heat exchange performance of the heat exchange component and the refrigerant storage capacity in the first cylinder relatively balanced. The present application also provides a thermal management system.

Description

Technical Field

[0001] The present application relates to the field of heat exchange technology, and in particular to a gas-liquid separator and a thermal management system. Background Art

[0002] In the air conditioning system, an intermediate heat exchanger is used to exchange heat between the high-temperature refrigerant from the condenser and the low-temperature refrigerant from the evaporator, so that the temperature of the refrigerant entering the compressor increases. In the cooling mode, the temperature of the refrigerant before throttling can also be reduced, thereby improving the cooling efficiency of the evaporator. Most compressors can only compress gaseous refrigerants. If liquid refrigerant enters the compressor, it will cause liquid hammer and damage the compressor. In order to avoid liquid hammering of the compressor, a gas-liquid separator is installed before the compressor.

[0003] In the related art, a gas-liquid separator integrating heat exchange and gas-liquid separation functions is adopted. The gas-liquid separator includes an inner cylinder, an outer cylinder and an interlayer cavity between the inner cylinder and the outer cylinder. The gas-liquid distribution component is located on the inner side of the inner cylinder, and the heat exchange component is located in the interlayer cavity. The refrigerant entering the interlayer cavity exchanges heat with the heat exchange component. In the refrigeration mode, the temperature of the refrigerant flowing into the expansion valve can be reduced, the refrigeration effect can be improved, and the compressor liquid hammer phenomenon can be further reduced. When the diameter of the outer cylinder remains unchanged, the large diameter of the manifold of the heat exchange component will result in a small volume of the inner cylinder, and the amount of refrigerant stored in the inner cylinder is small. The small diameter of the manifold of the heat exchange component and the large volume of the inner cylinder will result in a large amount of refrigerant stored in the inner cylinder, but the heat exchange performance of the heat exchange component will deteriorate. How to ensure a balance between the refrigerant storage capacity of the inner cylinder and the heat exchange performance of the heat exchange component is a technical problem that needs to be solved urgently. Summary of the invention

[0004] In view of the above-mentioned problems existing in the related art, the present application provides a gas-liquid separator with balanced heat exchange performance and refrigerant storage capacity.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: a gas-liquid separator, comprising: a first cylinder, a second cylinder and a heat exchange component, the first cylinder is located on the inner side of the second cylinder, the gas-liquid separator has a first cavity, the first cavity is located in the second cylinder, and the first cavity is located outside the first cylinder; the heat exchange component is at least partially located in the first cavity, the heat exchange component comprises a first collecting pipe, the first collecting pipe extends in a direction parallel to the axis of the first cylinder, the first collecting pipe is located between the first cylinder and the second cylinder, at least part of the side wall surface of the first cylinder is recessed inward to form a first recess, and the first collecting pipe is arranged corresponding to the first recess; the first cylinder and the first collecting pipe have a projection on a first plane, the first plane is perpendicular to the axis of the first cylinder, and on the first plane, the projection of the first recess is U-shaped, and the projection of the first collecting pipe is at least partially accommodated in the U-shaped space of the projection of the first recess.

[0006] In the present application, at least a portion of the side wall surface of the first cylinder is recessed inward to form a first recess. On the first plane, the projection of the first collecting pipe is at least partially accommodated in the U-shaped space of the projection of the first recess. When the diameter of the second cylinder remains unchanged, other parts of the first cylinder can be closer to the second cylinder, so that the volume of the first cylinder is large enough, which has little effect on the heat exchange performance of the heat exchange component, so that the heat exchange performance of the heat exchange component and the refrigerant storage amount in the first cylinder are more balanced.

[0007] In view of the above-mentioned problems existing in the related technology, the present application adopts the following technical solution: a thermal management system, including the above-mentioned gas-liquid separator, the thermal management system also includes an evaporator, a compressor, a condenser and a throttling device, the gas-liquid distribution component is connected between the evaporator and the compressor, and the heat exchange component is connected between the condenser and the throttling device. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a three-dimensional structural schematic diagram of an embodiment of a gas-liquid separator of the present application;

[0009] Figure 2 is a schematic diagram of the three-dimensional structure of an embodiment of a gas-liquid separator of the present application, wherein the second cylinder is not shown;

[0010] Figure 3 It is a three-dimensional exploded schematic diagram of an embodiment of a gas-liquid separator of the present application;

[0011] Figure 4 yes Figure 3 A schematic diagram of the assembly structure of the first guide part, the second guide part, the gas-liquid distribution component, the first support member and the second support member is shown;

[0012] Figure 5is a schematic top view of an embodiment of a gas-liquid separator of the present application, wherein the first flow guide portion is not shown;

[0013] Figure 6 is a schematic cross-sectional three-dimensional structure diagram of an embodiment of a gas-liquid separator of the present application, wherein the direction indicated by the arrow is the flow direction of the second fluid;

[0014] Figure 7 is a cross-sectional schematic diagram of an embodiment of a gas-liquid separator of the present application, wherein the direction indicated by the arrow is the flow direction of the first fluid;

[0015] Figure 8 It is a schematic diagram of the three-dimensional structure of the first flow guide part of an embodiment of the gas-liquid separator of the present application;

[0016] Fig. 9 It is a schematic diagram of the three-dimensional structure of the second flow guide part of an embodiment of the gas-liquid separator of the present application;

[0017] Fig.10 It is a schematic diagram of the three-dimensional structure of the first cylinder of another embodiment of the gas-liquid separator of the present application;

[0018] Fig.11 is a schematic projection diagram of an embodiment of a gas-liquid separator of the present application on a first plane;

[0019] Fig.12 is a simplified schematic diagram of an embodiment of the projection of the outer contour of the second cylinder, the outer contour of the first header, the outer contour of the second header and the outer contour of the sleeve on the first plane, wherein the outer surface of the first header is tangent to the outer surface of the second header, the outer surface of the first header and the outer surface of the second header are both tangent to the inner surface of the second cylinder, and the outer contour of the first cylinder is not shown;

[0020] Fig.13 is a simplified schematic diagram of an embodiment of the projection of the outer contour of the second cylinder, the outer contour of the first header, the outer contour of the second header and the outer contour of the sleeve on the first plane, wherein the outer surface of the first header is tangent to the outer surface of the second header, the outer surface of the first header and the outer surface of the second header are both substantially tangent to the outer surface of the sleeve, and the outer contour of the first cylinder is not shown;

[0021] Fig.14 is a simplified schematic diagram of an embodiment of projections of the outer contour of the second cylinder, the outer contour of the first header, the outer contour of the second header and the outer contour of the sleeve on the first plane, wherein the center of the projection of the first header coincides with the center of the projection of the second header, and the outer contour of the first cylinder is not shown;

[0022] Fig.15is a simplified schematic diagram of an embodiment of the projection of the outer contour of the second cylinder, the outer contour of the first collector, the outer contour of the second collector and the outer contour of the sleeve on the first plane, wherein the outer surface of the first collector and the outer surface of the second collector are both substantially tangent to the outer surface of the sleeve, the first collector and the second collector are symmetrically arranged with respect to a diameter of the second cylinder, and the outer contour of the first cylinder is not shown;

[0023] Fig.16 is a connection diagram of an embodiment of a thermal management system of the present application, wherein the direction indicated by the arrow is the flow direction of the refrigerant, and the thermal management system is in cooling mode at this time.

[0024] Wherein: 100, gas-liquid separator; 200, evaporator; 300, compressor; 400, condenser; 500, throttling device;

[0025] 10. First cavity; 20. Second cavity; 30. Third cavity; 40. Channel;

[0026] 1. first cylinder; 11. first side wall; 111. first side surface; 112. second side surface;

[0027] 2. The second cylinder;

[0028] 3. First flow guide; 31. First component; 311. First end surface; 312. Second end surface; 313. First step surface; 314. First side wall surface; 315. Second side wall surface; 32. Second component; 321. Third end surface; 322. Fourth end surface; 323. Second step surface; 324. Third side wall surface; 325. Fourth side wall surface; 33. First through hole; 331. First extension portion; 34. Second through hole; 341. Second extension portion; 35. Third through hole; 36. Fifth through hole;

[0029] 4. second guide portion; 41. third component; 42. fourth component; 43. fourth through hole; 44. sixth through hole;

[0030] 5. gas-liquid distribution assembly; 51. flow guide tube; 52. connecting tube; 53. sleeve; 54. first plate; 541. main body; 542. extension;

[0031] 6. heat exchange assembly; 61. first current collector; 62. second current collector; 63. heat exchange tube; 64. heat exchange element; 641. first heat exchange element; 642. second heat exchange element;

[0032] 71. first support member; 72. second support member; 721. filter screen; 722. bracket; 73. first connecting member;

[0033] 8. Thermal insulation assembly; 9. Flow guide piece. DETAILED DESCRIPTION

[0034] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0035] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0036] It should be understood that the words "first", "second" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "an" do not indicate a quantity limitation, but indicate the presence of at least one; "plurality" indicates a quantity of two or more. Unless otherwise specified, words such as "front", "rear", "lower" and / or "upper" are only for convenience of description and are not limited to one position or one spatial orientation. Words such as "include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprises" include the elements or objects listed after "include" or "comprises" and their equivalents, and do not exclude other elements or objects.

[0037] The gas-liquid separator of the exemplary embodiment of the present application is described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments and implementations can complement or be combined with each other.

[0038] According to a specific embodiment of the gas-liquid separator 100 of the present application, Figure 1-9 As shown, the gas-liquid separator 100 includes a first cylinder 1, a second cylinder 2, and a heat exchange assembly 6. The first cylinder 1 is located inside the second cylinder 2. The gas-liquid separator 100 has a first cavity 10 and a second cavity 20 that are connected. The first cavity 10 is located inside the second cylinder 2. The first cavity 10 is located outside the first cylinder 1. The second cavity 20 at least includes a space located inside the first cylinder 1. In this embodiment, at least a portion of the heat exchange assembly 6 is located inside the first cavity 10. In other embodiments, the heat exchange assembly 6 may also be located outside the second cylinder 2.

[0039] In this embodiment, the first barrel 1 and the second barrel 2 are both hollow cylinders with a generally circular cross section, and the outer diameter of the first barrel 1 is smaller than the inner diameter of the second barrel 2. A second cavity 20 is formed in the first barrel 1, and a gas-liquid distribution assembly 5 is disposed in the second cavity 20. The first cavity 10 is a chamber surrounded by the outer wall surface of the first barrel 1 and the inner wall surface of the second barrel 2.

[0040] The gas-liquid separator 100 also includes a first flow guide 3 and a second flow guide 4, which are fixedly arranged with the second cylinder 2 respectively, one end face of the second cylinder 2 abuts against the first flow guide 3, and the other end face abuts against the second flow guide 4, and one end face of the first cylinder 1 abuts against the first flow guide 3, and the other end is spaced apart from the first flow guide 3. In some embodiments, the first flow guide 3 can be connected to the first cylinder 1 and the second cylinder 2, or abutted by a sealing structure; the second flow guide 4 can be connected to the first cylinder 1 and the second cylinder 2, or abutted by a sealing structure. The first flow guide 3 has a third cavity 30, and the gas-liquid distribution component 5 is fixedly arranged with the first flow guide 3, and the gas-liquid distribution component 5 is connected with the second cavity 20, the third cavity 30 and the outside of the gas-liquid separator 100, and the third cavity 30 is connected with the first cavity 10.

[0041] In this embodiment, the first flow guide 3 includes a first component 31 and a second component 32 which are arranged at intervals. Along the axial direction of the gas-liquid separator 100, the projection of the first component 31 completely falls into the projection of the second component 32. The first component 31 is fixedly arranged with the first cylinder 1, and the second component 32 is fixedly arranged with the second cylinder 2. The third cavity 30 at least includes a space between the first component 31 and the second component 32. The first component 31 includes a first through hole 33 communicating with the third cavity 30 and a second through hole 34 communicating with the second cavity 20, and the second component 32 includes a third through hole 35 communicating with the outside of the gas-liquid separator 100.

[0042] The gas-liquid distribution assembly 5 includes a flow guide tube 51 and a connecting tube 52. One end of the connecting tube 52 is fixedly arranged with the first component 31, and the other end is fixedly arranged with the second component 32. The flow guide tube 51 is fixedly arranged with the first component 31. At least a part of the flow guide tube 51 is located in the second cavity 20, and at least a part of the connecting tube 52 is located in the third cavity 30. The inner cavity of the flow guide tube 51 is connected with the first through hole 33, and the inner cavity of the connecting tube 52 is connected with the second through hole 34 and the third through hole 35.

[0043] Along the axial direction of the gas-liquid separator 100 , the projection of the first cylinder 1 completely falls into the projection of the first component 31 , and the outer contour shape of the first component 31 is substantially the same as the cross-sectional shape of the first cylinder 1 .

[0044] The first component 31 includes a first end face 311 away from the first barrel 1, a second end face 312 opposite to the first end face 311, and a first step face 313. The first step face 313 divides the side wall surface of the first component 31 into two sections, namely, a first side wall surface 314 and a second side wall surface 315. The first step face 313 is extended to connect the first side wall surface 314, and is extended to connect the second side wall surface 315. The upper end face of the first barrel 1 abuts against the first step face 313. In some embodiments, part of the inner wall surface of the first barrel 1 is arranged to fit the second side wall surface 315. The first through hole 33 and the second through hole 34 both form openings at the first end face 311 and the second end face 312.

[0045] The second component 32 includes a third end face 321 away from the second barrel 2, a fourth end face 322 opposite to the third end face 321, and a second step face 323. The second step face 323 divides the side wall of the second component 32 into two sections, namely, a third side wall 324 and a fourth side wall 325. The second step face 323 is extended to connect the third side wall 324, and is extended to connect the fourth side wall 325. The upper end face of the second barrel 2 abuts against the second step face 323. In some embodiments, part of the inner wall of the second barrel 2 is arranged to fit the fourth side wall 325. The third through hole 35 is formed with openings at both the third end face 321 and the fourth end face 322.

[0046] The gas-liquid separator 100 also includes a pipeline connection assembly, which is connected to the second component 32. The pipeline connection assembly includes a first connector 73 having a first channel, a second connector having a second channel, a fastener connecting the first connector 73 and the second connector, and a seal provided between the first connector 73 and the second connector. When the first connector 73 and the second connector are connected by the fastener, the first channel is connected to the second channel and the seal is compressed, and the connection between the first channel and the second channel is sealed by the seal. One of the first connector 73 and the second connector is connected to the second component 32, and the other is connected to the pipe. The first channel and the second channel communicate with the third through hole 35 and the outside of the gas-liquid separator 100. When the first connector 73 and the second connector are fixedly connected by the fastener, the second cavity 20 is connected to the external pipe, and the gas-liquid separator 100 is connected to the thermal management system. It can be understood that in the present application, the pipeline connection assembly is connected to the second component 32 means that one of the first connector 73 or the second connector can be integrally formed with the second component 32 (refer to Figure 2 ), the pipeline connection assembly and the second component 32 can also be formed separately and then processed and connected together.

[0047] In some embodiments, reference Figure 6-8The edge of the opening of the first through hole 33 located at the second end surface 312 extends toward the second cavity 20 to form a first extension portion 331, and the inner side wall of the first extension portion 331 is connected to a part of the outer side wall of the flow guide tube 51, thereby increasing the reliability of the connection between the flow guide tube 51 and the first component 31. The edge of the opening of the second through hole 34 located at the first end surface 311 extends toward the third cavity 30 to form a second extension portion 341, and the inner side wall of the second extension portion 341 is connected to a part of the outer side wall of the connecting tube 52, thereby increasing the reliability of the connection between the connecting tube 52 and the first component 31.

[0048] In this embodiment, the second flow guide 4 includes a third component 41 and a fourth component 42 which are arranged at intervals, the third component 41 covers the end of the second cylinder 2 away from the first flow guide 3, and the fourth component 42 covers the end of the first cylinder 1 away from the first flow guide 3. Along the axial direction of the gas-liquid separator 100, the projection of the third component 41 completely falls into the projection of the second cylinder 2, and the projection of the fourth component 42 completely falls into the projection of the first cylinder 1. At least a portion of the outer wall surface of the third component 41 is sealed and connected with a portion of the inner wall surface of the second cylinder 2, and at least a portion of the outer wall surface of the fourth component 42 is sealed and connected with a portion of the inner wall surface of the first cylinder 1. In other embodiments, the third component 41 can be similar in structure to the second component 32, the third component 41 has a step surface, the second cylinder 2 abuts against the step surface, and along the axial direction of the gas-liquid separator 100, the projection of the third component 41 completely falls into the projection of the second cylinder 2; the fourth component 42 can be similar in structure to the first component 31, the fourth component 42 has a step surface, the first cylinder 1 abuts against the step surface, and along the axial direction of the gas-liquid separator 100, the projection of the fourth component 42 completely falls into the projection of the first cylinder 1.

[0049] The third component 41 has a fourth through hole 43 connecting the outside of the gas-liquid separator 100 and the first cavity 10, and the fourth through hole 43 is formed with openings on two opposite sides of the third component 41. In some embodiments, the opening formed on the side of the fourth through hole 43 close to the first cavity 10 is larger than the opening formed on the side away from the first cavity 10, specifically, the fourth through hole 43 is divided into two sections, the section away from the first cavity 10 is a first section that is roughly in the shape of a straight cylinder, and the section close to the first cavity 10 is a second section that is roughly in the shape of a trumpet, the outline size of the cross section of one end of the second section is the same as the outline size of the cross section of the first section, and the outline size of the cross section of the other end of the second section is larger than the outline size of the cross section of the first section.

[0050] The gas-liquid separator 100 is provided with a first support member 71 abutting between the third member 41 and the fourth member 42. Figure 3 , 4As shown in FIGS. 6 and 7 , the first support member 71 is a substantially straight cylindrical body, and the third component 41 and the fourth component 42 are respectively provided with grooves for accommodating the ends of the first support member 71, so as to increase the stability of the first support member 71 in supporting the third component 41 and the fourth component 42. In some other embodiments, the first support member 71 may be at least one protrusion formed by extending the third component 41 or the fourth component 42, and the protrusion is located between the third component 41 and the fourth component 42 to support the third component 41 and the fourth component 42.

[0051] In some other embodiments, the second guide portion 4 may only include the third component 41 covering the second barrel 2, the first barrel 1 includes a barrel portion and a bottom cover integrally formed with the barrel portion, and the side wall of the barrel portion is the first side wall 11. The first support member 71 abuts between the third component 41 and the bottom cover. The matching relationship between the bottom cover, the first support member 71 and the third component 41 is similar to the matching relationship between the third component 41, the fourth component 42 and the first support member 71, and will not be repeated here.

[0052] The third component 41 is connected to the pipeline connection assembly. When the first connection member 73 is fixedly connected to the second connection member by a fastener, the first cavity 10 is communicated with the outside of the gas-liquid separator 100, and the gas-liquid separator 100 is connected to the thermal management system.

[0053] In this embodiment, during installation, the end face of one end of the first cylinder 1 abuts against the first step surface 313, the inner wall surface of the first cylinder 1 is welded to the second side wall surface 315, and the inner wall surface of the other end of the first cylinder 1 is welded to the outer wall surface of the fourth component 42, thereby achieving sealing of the first cylinder 1; the end face of one end of the second cylinder 2 abuts against the second step surface 323, the inner wall surface of the second cylinder 2 is welded to the fourth side wall surface 325, and the inner wall surface of the other end of the second cylinder 2 is welded to the outer wall surface of the third component 41, thereby achieving sealing of the second cylinder 2.

[0054] In this embodiment, the gas-liquid distribution component 5 includes a guide tube 51, a connecting tube 52, a sleeve 53, and a first plate 54. The sleeve 53 is sleeved on the outside of the guide tube 51. The first plate 54 has a through hole. One end of the guide tube 51 passes through the through hole so that the first plate 54 is sleeved on the upper part of the guide tube 51. The first plate 54 is located above the sleeve 53.

[0055] The first plate 54 includes a main body 541 sleeved on the flow guide tube 51 and an extension 542 extending downward along the outer edge of the main body 541. There is a gap between the upper surface of the main body 541 and the second end surface 312 of the first component 31, so that the first fluid can flow from the connecting tube 52 into the second cavity 20. There is a gap between the outer wall surface of the extension 542 and the inner wall surface of the first cylinder 1, so that the first fluid continues to flow downward after entering the second cavity 20 from the connecting tube 52. There is a gap between the lower surface of the main body 541 and the upper end surface of the sleeve 53, and there is a gap between the inner wall surface of the extension 542 and the outer wall of the sleeve 53, and the end of the sleeve 53 close to the first plate 54 is open, so that the second cavity 20 is connected with the inner cavity of the sleeve 53.

[0056] The inner wall surface of the sleeve 53 is spaced a preset distance from the outer wall surface of the flow guide tube 51, so that a channel 40 for the first fluid to flow is formed between the inner wall surface of the sleeve 53 and the outer wall surface of the flow guide tube 51. The end of the sleeve 53 away from the first plate 54 is sealed, so that the inner cavity of the sleeve 53 is isolated from the second cavity 20 at the end away from the first plate 54. A gap is left between the lower end surface of the flow guide tube 51 and the lower end surface of the sleeve 53, so that the channel 40 is connected to the inner cavity of the flow guide tube 51.

[0057] In this embodiment, the sleeve 53, the flow guide tube 51 and the connecting tube 52 are all hollow cylinders with a roughly circular cross-section. One end of the flow guide tube 51 is connected to the first component 31 and communicates with the third chamber 30, and the other end is open and communicates with the channel 40, that is, the open end is connected to the channel 40. One end of the connecting tube 52 is connected to the first component 31 and communicates with the second chamber 20, and the other end is connected to the second component 32 and communicates with the outside of the gas-liquid separator 100. One end of the sleeve 53 close to the fourth component 42 is self-sealing, and the other end is open and communicates with the second chamber 20. The inner side wall of the end of the sleeve 53 close to the fourth component 42 is provided with a limiting structure (refer to Figure 6 ), the end of the guide tube 51 extends into the limiting structure, thereby fixing the sleeve 53 and the guide tube 51, which can be used to limit the displacement of the guide tube, but the design of the limiting structure does not affect the flow of the first fluid.

[0058] In some embodiments, the sleeve 53 can be fixed only by the limiting structure, or the sleeve 53 can be connected to the first plate 54 to fix the sleeve 53.

[0059] In some embodiments, a balancing hole (not shown) connecting the channel 40 and the inner cavity of the flow guide tube 51 is opened on the side wall of one end of the flow guide tube 51 close to the first component 31. The balancing hole is used to reduce the phenomenon that the liquid first fluid is sucked into the compressor 300 due to the pressure difference when the compressor 300 is shut down.

[0060] The gas-liquid separator 100 is also provided with a filter assembly 72, which is fixed to one end of the sleeve 53 near the fourth component 42. The filter assembly 72 includes a filter screen 721 and a bracket 722, and the bracket 722 abuts between the sleeve 53 and the fourth component 42, and is used to fix the filter screen 721, and can also be used to limit the sleeve to reduce the shaking of the gas-liquid distribution component 5. The fourth component 42 can also be provided with a boss or a groove that cooperates with the bracket 722, and one end of the bracket 722 is sleeved on the outside of the boss or inserted into the groove. An oil return hole (not shown) can be provided at one end of the sleeve 53 near the fourth component 42, and the aperture of the oil return hole is matched according to the capacity of the thermal management system, so that the ratio of the refrigerant oil and the first fluid returned to the compressor is better, and the filter screen 721 can prevent impurities from entering the compressor through the oil return hole.

[0061] In some other embodiments, the sleeve 53 may be sealed and fixed to the fourth component 42 or the bracket 722 at one end, and open at the other end. The sleeve 53 may also be sealed and fixed to the fourth component 42 at one end, and sealed and fixed to the first plate 54 at the other end, but the sleeve 53 is provided with an opening at the end close to the first plate 54, and the opening communicates the inner cavity of the sleeve 53 with the second cavity 20. The sleeve 53 may also be sealed at one end but fixed to or connected to the fourth component 42, and open or connected to the first plate 54 at the other end, but the inner cavity of the sleeve 53 at the end close to the first plate 54 communicates with the second cavity 20. The sleeve 53 may also be fixed to the first plate 54 at one end, and sealed at the other end and not in contact with the fourth component 42, and the inner cavity of the sleeve 53 at the end close to the first plate 54 communicates with the second cavity 20.

[0062] It should be understood that when the gas-liquid separator 100 is not provided with the fourth component 42 but the first cylinder 1 has a bottom cover, the matching relationship between the sleeve 53 and the bottom cover is similar to the matching relationship between the sleeve 53 and the fourth component 42, which will not be repeated here.

[0063] In some other embodiments, the flow guide tube 51 is U-shaped, and one end thereof is higher than the other end, the higher end is connected to the first component 31, and the lower end is an open end. The open end is spaced a predetermined distance from the second end face 312. A connecting tube 52 connected to the first component 31 and communicating with the second through hole 34 is provided in the first cylinder 1, and the lower end face of the connecting tube 52 is lower than the open end, so that after the gas-liquid mixed refrigerant enters the second cavity 20 through the connecting tube 52, the liquid refrigerant sinks due to gravity, and the gaseous refrigerant floats and flows into the U-shaped flow guide tube 51 from the open end, and then enters the first cavity 10 through the third cavity 30.

[0064] When the gas-liquid separator 100 is working, the flow direction of the first fluid is as follows: the first fluid flows from the third through hole 35 through the connecting pipe 52 into the second chamber 20, and continues to flow downward from the gap between the extension 542 and the inner wall of the first cylinder 1, and then flows through the gap between the inner wall of the extension 542 and the outer wall of the sleeve 53, and the gap between the lower surface of the main body 541 and the upper end surface of the sleeve 53, and enters the channel 40 from the upper end of the sleeve 53, and continues to flow downward in the channel 40. After that, the first fluid enters the guide tube 51 from the lower end (open end) of the guide tube 51, and continues to flow upward in the guide tube 51. After that, the first fluid enters the third chamber 30 from the first through hole 33, enters the first chamber 10 from the gap between the first component 31 and the second component 32, and continues to flow downward. Finally, the first fluid flows out of the gas-liquid separator 100 through the fourth through hole 43 of the third component 41 to enter the compressor 300. At this point, the first fluid completes the entire process of gas-liquid separation and heat exchange. In the process of the first fluid flowing in the first cavity 10, heat is exchanged with the heat exchange component 6.

[0065] It should be noted that the first fluid entering the second chamber 20 from the first guide portion 3 is usually 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, while the gaseous first fluid floats up, and under the suction action of the compressor, enters the channel 40 from the upper end of the sleeve 53, 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 separator 100 from the second guide portion 4 to achieve gas-liquid separation of the first fluid.

[0066] The gas-liquid separator 100 includes a heat exchange assembly 6 at least partially located in the first chamber 10, and the heat exchange assembly 6 includes a first header 61, a second header 62, a heat exchange tube 63 and a heat exchange member 64. The second component 32 of the first air guide 3 includes a fifth through hole 36 connecting the outside of the gas-liquid separator 100 and the heat exchange assembly 6, and the third component 41 of the second air guide 4 includes a sixth through hole 44 connecting the outside of the gas-liquid separator 100 and the heat exchange assembly 6. In this embodiment, one end of the first header 61 is connected to the second component 32, one end of the second header 62 is connected to the third component 41, the first header 61 and the second header 62 are arranged in parallel, one end of the first header 61 is sealed and the other end is connected to the fifth through hole 36, and one end of the second header 62 is sealed and the other end is connected to the sixth through hole 44. At least part of the side wall of the first cylinder 1 is recessed in a direction away from the second cylinder 2 to form a first recess, and the first header 61 and the second header 62 are both arranged corresponding to the first recess, and at least part of the first header 61 and the second header 62 are accommodated in the first recess. Along the axial direction of the gas-liquid separator 100, the first component 31 and the fourth component 42 are provided with a relief portion at the position corresponding to the first recess, so as to facilitate the connection and assembly of the first header 61 and the second header 62 with the second component 32 and the third component 41.

[0067] Optionally, the heat exchange tube 63 is a flat tube, the number of which includes at least one, one end of which is connected to the first header 61, and the other end of which is connected to the second header 62. Each flat tube includes a plurality of flow channels extending along the flat tube, the plurality of flow channels are arranged at intervals from each other, and each flow channel communicates with the inner cavity of the first header 61 and the inner cavity of the second header 62.

[0068] The heat exchange element 64 is connected to the heat exchange tube 63. It should be understood that the connection means that the heat exchange element 64 and the heat exchange tube 63 can be integrally formed or separately formed and then connected together through processing. The heat exchange tube 63 and the heat exchange element 64 are both arranged around at least a portion of the first cylinder 1.

[0069] In some other embodiments, a flat tube is arranged around the first cylinder 1 to form an approximately cylindrical shape; in some embodiments, at least two flat tubes are arranged in parallel along the axial direction parallel to the gas-liquid separator 100, and at least two flat tubes are coiled in the same direction to form an approximately cylindrical shape.

[0070] Reference Figure 6 and Figure 7In this embodiment, the heat exchanger 64 and the heat exchange tube 63 are connected by brazing. The heat exchanger 64 includes a first heat exchanger 641 and a second heat exchanger 642 respectively located on opposite sides of the heat exchange tube 63. The first heat exchanger 641 and the second heat exchanger 642 are respectively fixedly connected to the heat exchange tube 63. The first heat exchanger 641 is connected to the inner wall surface of the second cylinder 2 and one side wall surface of the heat exchange tube 63, and the second heat exchanger 642 is connected to the outer wall surface of the first cylinder 1 and the other side wall surface of the heat exchange tube 63. The first heat exchanger 641 and the second heat exchanger 642 are connected to the first cylinder 1 and the second cylinder 2 by brazing. The first heat exchanger 641 and the second heat exchanger 642 are arranged in the first cavity 10, so as to strengthen the heat exchange between the second fluid in the heat exchange tube 63 and the first fluid in the first cavity 10.

[0071] Reference Figure 2 and Figure 7 In this embodiment, a flow guide 9 is provided between the first manifold 61, the second manifold 62 and the second cylinder 2 to prevent the first fluid from directly flowing out of the first chamber 10 through the gap between the first manifold 61, the second manifold 62 and the second cylinder 2. The flow guide 9 may be connected to the first heat exchange member 641 or may not be connected to the first heat exchange member 641. This application does not limit this, and it may be set according to the specific application environment.

[0072] The flow guide 9 includes at least two parts located at the upper end of the first collecting pipe 61 and the lower end of the first collecting pipe 61, so as to prevent part of the first fluid flowing out of the third chamber 30 from directly flowing downward through the gap between the first collecting pipe 61 and the second collecting pipe 62 and the second cylinder 2 and even flowing out of the first chamber 10, so that the first fluid can flow through the outside of the heat exchange element 64 and the heat exchange tube 63 as much as possible, which is beneficial to improve the heat exchange efficiency of the gas-liquid separator 100.

[0073] Reference Figure 2 , 3, 9, 11, the flow guide 9 includes a first mating surface that fits with the second cylinder 2, a second mating surface that fits with the first manifold 61, and a third mating surface that fits with the second manifold 62. Optionally, the first mating surface and the second cylinder 2 can be fitted, that is, the first mating surface is a curved surface, which can effectively prevent the first fluid from flowing out of the first cavity 10 from the gap between the flow guide 9 and the inner wall surface of the second cylinder 2. A convex rib is provided between the second mating surface and the third mating surface, one side of the wall surface of the convex rib extends to connect with the second mating surface, and the other side extends to connect with the third mating surface, the convex rib is provided in the gap between the first manifold 61 and the second manifold 62, one side of the wall surface of the convex rib fits with the first manifold 61, and the other side fits with the second manifold 62, and the second mating surface fits with the first manifold 61, and the third mating surface fits with the second manifold 62, which can effectively prevent the first fluid from flowing out of the first cavity 10 from the gap between the first manifold 61, the second manifold 62 and the flow guide 9.

[0074] The gas-liquid separator 100 is working, and when the system using the gas-liquid separator is in cooling mode, the flow direction of the second fluid is as follows: the second fluid flows from the sixth through hole 44 through the second header 62 into the heat exchange tube 63, flows along the heat exchange tube 63 to the first header 61, and finally the second fluid flows out of the gas-liquid separator 100 from the fifth through hole 36. At this point, the second fluid completes the entire process of heat exchange. In the first cavity 10, the second fluid flowing in the inner cavity of the heat exchange tube 63 exchanges heat with the first fluid flowing in the first cavity 10.

[0075] In this embodiment, the second cylinder 2, the first manifold 61, and the second manifold 62 have projections on the first plane, and the first plane is perpendicular to the axial direction of the gas-liquid separator 100. Fig.10 As shown, the outer contours of the first header 61, the second header 62, the sleeve 53 and the second cylinder 2 projected on the first plane are all circular.

[0076] On the first plane, the center of the outer contour of the projection of the second cylinder 2 is marked as A, the midpoint of the line connecting the center of the outer contour of the projection of the first manifold 61 and the center of the outer contour of the projection of the second manifold 62 is marked as B, and the line connecting point A to point B and the extension line thereof form ray LI. The outer contour of the projection of the first manifold 61 has a tangent point marked as C, point C is located on the side of the first manifold 61 away from ray LI, the tangent line from point A to point C and the extension line thereof form ray L2, and an angle R1 is formed between L1 and L2, and the value range of angle R1 is 5°≤R1≤120°. The outer contour of the projection of the second manifold 62 has a tangent point marked as D, point D is located on the side of the second manifold 62 away from ray LI, the tangent line from point A to point D and the extension line thereof form ray L3, and an angle R2 is formed between L1 and L3, and the value range of angle R2 is 5°≤R2≤120°.

[0077] On the first plane, the diameter of the outer contour of the projection of the first manifold 61 is D1, and the value range of D1 is 8mm≤D1≤16mm; the diameter of the outer contour of the projection of the second manifold 62 is D2, and the value range of D2 is 8mm≤D2≤16mm; the diameter of the outer contour of the projection of the second cylinder 2 is D3, and the value range of D3 is 50mm≤D3≤100mm; the diameter of the outer contour of the projection of the sleeve 53 is D4, and the value range of D4 is 16mm≤D4≤25mm, 0.15≤D4 / D3≤0.5. The values ​​of the above-mentioned angles R1 and R2 are related to the values ​​of D1, D2, D3 and D4, that is, when any value of D1, D2, D3 and D4 changes, the values ​​of the angles R1 and R2 may change accordingly.

[0078] Reference Fig.11 , the first manifold 61 and the second manifold 62 are arranged in parallel and tangentially, a small part of the first manifold 61 and the second manifold 62 is accommodated in the first recess, at this time, the heat exchange tube 63 is not accommodated in the first recess, the extension direction of the end of the heat exchange tube 63 connected to the first manifold 61 is perpendicular to L1, and the extension direction of the end of the heat exchange tube 63 connected to the second manifold 62 is perpendicular to L1, such an arrangement can reduce the bending of the end of the heat exchange tube 63, can reduce the flow resistance of the second fluid flowing from the heat exchange tube 63 into the first manifold 61 and from the second manifold 62 into the heat exchange tube 63, and can also simplify the process of assembling the heat exchange tube 63 with the first manifold 61 and the second manifold 62. On the other hand, since only a small part of the first manifold 61 and the second manifold 62 are accommodated in the first recess, compared with the structure in which the first manifold 61 and the second manifold 62 are completely accommodated in the first recess, the volume of the first cylinder 1 can be increased, and the gas-liquid separator effect of the gas-liquid separator 100 can be improved.

[0079] like Fig.12 As shown, it is a simple schematic diagram of the projection of the outer contour of the second cylinder 2, the outer contour of the first collecting tube 61, the outer contour of the second collecting tube 62 and the outer contour of the sleeve 53 on the first plane. In the figure, the thickness of the second cylinder 2 is infinitely close to zero. The outer surface of the first collecting tube 61 is tangent to the inner surface of the second cylinder 2, the outer surface of the second collecting tube 62 is tangent to the inner surface of the second cylinder 2, and the outer surface of the first collecting tube 61 is tangent to the outer surface of the second collecting tube 62. Point A, point B, point C, point D, ray L1, ray L2 and ray L3 are shown in the figure. D1 is equal to D2, and L1 is perpendicular to the line connecting the center of the outer contour of the projection of the first collecting tube 61 and the center of the outer contour of the projection of the second collecting tube 62. Therefore, R1 is equal to R2, the value range of angle R1 is 10°≤R1≤56°, and the value range of angle R2 is 10°≤R2≤56°. As Fig.13As shown, it is a simplified schematic diagram of the projection of the outer contour of the second cylinder 2, the outer contour of the first collector 61, the outer contour of the second collector 62 and the outer contour of the sleeve 53 on the first plane. In the figure, the thickness of the first cylinder 1 and the second cylinder 2 is infinitely close to zero, wherein the contour line of the first cylinder 1 is not shown. The outer surface of the first collector 61 is arranged roughly tangent to the outer surface of the sleeve 53, the outer surface of the second collector 62 is arranged roughly tangent to the outer surface of the sleeve 53, the outer surface of the first collector 61 is arranged tangent to the outer surface of the second collector 62, and point A, point B, point C, point D, ray L1, ray L2 and ray L3 are shown in the figure. The value range of angle R1 is 28°≤R1≤60°, and the value range of angle R2 is 28°≤R2≤60°.

[0080] It should be understood that the first collecting pipe 61 and the second collecting pipe 62 are located between the first cylinder 1 and the second cylinder 2, and the sleeve 53 is located on the inner side of the first cylinder 1, so the first side wall 11 of the first cylinder 1 is located between the first collecting pipe 61 and the second collecting pipe 62 and the sleeve 53, and the outer surface of the first collecting pipe 61 and the outer surface of the second collecting pipe 62 are not directly tangent to the outer surface of the sleeve 53. Approximately tangent means that when the wall thickness of the first cylinder 1 is infinitely close to zero, the outer surface of the first collecting pipe 61 and the outer surface of the second collecting pipe 62 are infinitely close to the outer surface of the sleeve 53, and are close to being tangent.

[0081] Combination Fig.12 and Fig.13 , when the outer diameter of the first manifold 61 and the outer diameter of the second manifold 62 remain unchanged, and the outer surface of the first manifold 61 and the outer surface of the second manifold 62 are kept tangent, the first manifold 61 and the second manifold 62 gradually approach the sleeve 53 along the radial direction of the second cylinder 2, that is, the first manifold 61 and the second manifold 62 gradually change from being tangent to the inner surface of the second cylinder 2 to being approximately tangent to the outer surface of the sleeve 53, and the angles R1 and R2 gradually increase. Since the first manifold 61 and the second manifold 62 are arranged corresponding to the first recess, the first manifold 61 and the second manifold 62 are at least partially accommodated in the first recess, when the angles R1 and R2 gradually increase, the depth of the first recess also gradually increases, and at this time the volume of the first cylinder 1 also gradually decreases.

[0082] like Fig.14As shown, it is a simplified schematic diagram of the projection of the outer contour of the second cylinder 2, the outer contour of the first collector 61, the outer contour of the second collector 62 and the outer contour of the sleeve 53 on the first plane. In the figure, the thickness of the first cylinder 1 and the second cylinder 2 is infinitely close to zero, wherein the contour line of the first cylinder 1 is not shown. Along the direction parallel to the axis of the first cylinder 1, the first collector 61 and the second collector 62 are arranged side by side. On the first plane, the center of the projection of the first collector 61 coincides with the center of the projection of the second collector 62. The outer surfaces of the first collector 61 and the second collector 62 are both tangent to the inner surface of the second cylinder 2. Point A, point B, point C, point D, ray L1, ray L2 and ray L3 are shown in the figure. The value range of angle R1 is 5°≤R1≤28°, and the value range of angle R2 is 5°≤R2≤28°. When the outer surfaces of the first collecting pipe 61 and the second collecting pipe 62 are both substantially tangent to the outer surface of the sleeve 53, the value range of the angle R1 is 14°≤R1≤30°, and the value range of the angle R2 is 14°≤R2≤30°.

[0083] like Fig.15 As shown, it is a simplified schematic diagram of the projection of the outer contour of the second cylinder 2, the outer contour of the first header 61, the outer contour of the second header 62 and the outer contour of the sleeve 53 on the first plane. In the figure, the thickness of the first cylinder 1 and the second cylinder 2 is infinitely close to zero, wherein the contour line of the first cylinder 1 is not shown. The first header 61 and the second header 62 are arranged along the circumference of the first cylinder 1. On the first plane, the center of the projection of the first header 61 and the center of the projection of the second header 62 do not coincide. The value range of the angle R1 is 5°<R1≤120°, and the value range of the angle R2 is 5°<R1≤120°. It should be understood that when the projection of the first collecting tube 61 and the projection of the second collecting tube 62 are symmetrically distributed on the first plane relative to a diameter of the sleeve, point A and point B coincide. Since the first collecting tube 61 and the second collecting tube 62 are symmetrically distributed, L1 is a ray passing through point A and perpendicular to the center of the outer contour of the projection of the first collecting tube 61 and the center of the outer contour of the projection of the second collecting tube 62.

[0084] The gas-liquid separator 100 also includes a heat insulation component 8, which is fixedly arranged with the first cylinder 1. The first cylinder 1 includes a first side wall 11, and the first side wall 11 includes a first side surface 111 close to the second cavity 20 and a second side surface 112 close to the first cavity 10. The heat insulation component 8 is fixedly connected to at least one of the first side surface 111 and the second side surface 112, and at least a part of the first side surface 111 and / or the second side surface 112 is fitted with the heat insulation component 8. Optionally, the heat insulation component 8 can be a heat insulation coating sprayed on the first side wall 11 of the first cylinder 1, and the heat insulation component 8 can also be a heat insulation component fixed on the first side wall 11. The materials of the heat insulation coating and the heat insulation component will not cause pollution to the first fluid and will not affect the cleanliness of the first fluid.

[0085] It can be understood that, taking the thermal insulation component 8 as a thermal insulation coating as an example, the thermal insulation coating can be sprayed only on the first side 111, or only on the second side 112, or both the first side 111 and the second side 112 can be sprayed with the thermal insulation coating, as long as the heat exchange between the liquid first fluid in the first cylinder 1 and the heat exchange component 6 or the first fluid outside the first cylinder 1 can be reduced, the present application is not limited.

[0086] like Figure 3 As shown, the first cylinder 1 includes a first part and a second part, the first part is close to the first guide part 3, the second part is close to the second guide part 4, and at least the second part is provided with a heat insulation component 8 for reducing the heat exchange between the liquid first fluid in the first cavity 10 and the first fluid and the heat exchange component 6 in the second cavity 20. Along the axial direction of the gas-liquid separator 100, the height of the second part is at least half of the height of the first cylinder 1. The inventor conducted a large number of experiments and found that when the height of the second part along the axial direction of the gas-liquid separator 100 is at least half of the axial height of the first cylinder 1, the heat exchange of the liquid first fluid in the second cavity 20 can be more effectively reduced. In some embodiments, the height of the second part along the axial direction of the gas-liquid separator 100 can be the same as the axial height of the first cylinder 1, which can more comprehensively prevent the liquid first fluid in the first cylinder 1 from performing heat exchange, thereby ensuring the heat exchange performance of the thermal management system.

[0087] The heat insulation component 8 completely covers the second part. Taking the heat insulation component 8 as a heat insulation coating as an example, the heat insulation coating is sprayed on the first side surface 111 and / or the second side surface 112 corresponding to the second part (refer to Figure 3 , the shaded portion is the area where the heat-insulating coating is sprayed on the second side surface 112). The heat-insulating coating may be fully coated on the first side surface 111 and / or the second side surface 112, or may be sprayed only on the first side surface 111 and / or the second side surface 112 corresponding to the second portion.

[0088] When the gas-liquid separator 100 is working, due to the effect of gravity, the liquid first fluid will be stored at one end of the first cylinder 1 close to the second guide part 4, and the gaseous first fluid will flow into the first cavity 10 through the gas-liquid distribution component 5 to exchange heat with the heat exchange component, and then flow out of the gas-liquid separator 100. Since the required refrigerant filling amount of the thermal management system under different working conditions is different, the gas-liquid separator 100 in the related art will store liquid refrigerant, and then adjust the refrigerant filling amount of the thermal management system by adjusting whether to export the liquid refrigerant and adjusting the amount of the liquid refrigerant exported.

[0089] In the present application, if the stored liquid first fluid exchanges heat with the heat exchange component 6 or the gaseous first fluid in the first cavity 10, it may be heated into a gaseous state and enter the heat exchange cycle of the thermal management system, which will affect the heat exchange performance of the thermal management system. Therefore, a heat insulation component 8 is provided on the first side wall 11 of the first cylinder 1 to reduce the heat exchange between the liquid first fluid in the first cylinder 1 and the heat exchange component 6 or the gaseous first fluid in the first cavity 10, thereby ensuring the normal operation of the thermal management system and thus ensuring the heat exchange performance of the thermal management system.

[0090] According to another specific embodiment of the gas-liquid separator 100 of the present application, Fig.10 As shown, the difference between this embodiment and the above embodiment is that the first part and the second part of the first barrel 1 are molded separately and then assembled and connected together. The axial height of the barrel portion corresponding to the second part is at least half of the axial height of the first barrel 1. The barrel portion corresponding to the second part is made of a material with poor thermal conductivity compared to metal, such as plastic or ceramic. The percentage of gaseous refrigerant in the refrigerant in the first cavity 10 corresponding to the barrel portion corresponding to the first part is large, and the heating of this part of the refrigerant has little effect on the thermal management system. The barrel portion corresponding to the first part can be made of metal or the same material as the barrel portion corresponding to the second part. Its main purpose is to reduce the heat exchange between the first fluid in the heat exchange component 6 and the first cavity 10 and the liquid first fluid in the first barrel 1, thereby ensuring the heat exchange performance of the thermal management system. The parts of this embodiment that are the same as the above embodiment are not repeated here.

[0091] According to another specific embodiment of the gas-liquid separator 100 of the present application, the difference between this embodiment and the above embodiment is that the location of the heat insulation component 8 is different. The heat exchanger 64 includes a first heat exchanger 641 and a second heat exchanger 642 respectively located on opposite sides of the heat exchange tube 63, and the second heat exchanger 642 is at least partially attached to the first cylinder 1. The second heat exchanger 642 and the first cylinder 1 are attached to form a contact surface, and the shape of the contact surface is related to the structure of the second heat exchanger 642. The heat insulation component 8 is arranged in the area corresponding to the contact surface on the first side 111 and / or the second side 112. Its main purpose is to reduce the heat exchange between the heat exchange component 6 and the liquid first fluid in the first cylinder 1, so as to ensure the heat exchange performance of the thermal management system. In some other embodiments, the heat insulation component 8 can also be arranged only on the side wall corresponding to the contact surface of the second part, and its main purpose is to reduce the heat exchange between the heat exchange component 6 and the liquid first fluid in the first cylinder 1. The same parts of this embodiment as the above embodiment are not repeated here.

[0092] Fig.16 This is a connection diagram of the thermal management system of the exemplary embodiment of the present application. The direction indicated by the arrow is the direction of the refrigerant flow, and the thermal management system is in cooling mode. Fig.16 As shown, a thermal management system includes a gas-liquid separator 100, an evaporator 200, a compressor 300, a condenser 400 and a throttling device 500. The evaporator 200 is connected to the gas-liquid distribution component 5 through the first guide portion 3 of the gas-liquid separator 100, and the outlet of the evaporator 200 is connected to the third through hole 35. The compressor 300 is connected to the gas-liquid distribution component 5 through the second guide portion 4 of the gas-liquid separator 100, and the inlet of the compressor 300 is connected to the fourth through hole 43. The condenser 400 is connected to the heat exchange component 6 through the second guide portion 4 of the gas-liquid separator 100, and the outlet of the condenser 400 is connected to the sixth through hole 44. The throttling device 500 is connected to the heat exchange component 6 through the first guide portion 3 of the gas-liquid separator 100, and the inlet of the throttling device 500 is connected to the fifth through hole 36. In the cooling mode, the high-temperature gaseous refrigerant flowing out of the compressor 300 flows through the heat exchange component 6 in the gas-liquid separator 100 after heat exchange in the condenser 400, and then enters the evaporator 200 for heat exchange after throttling by the throttling device 500. The gas-liquid two-phase refrigerant flowing out of the evaporator 200 enters the gas-liquid separator 100. After gas-liquid separation in the gas-liquid separator 100, the refrigerant flows into the compressor 300, completing a heat exchange cycle. In the gas-liquid separator 100, the liquid refrigerant is stored in the first cylinder 1 through the action of the gas-liquid distribution component 5, and the gaseous refrigerant exchanges heat with the heat exchange component 6. After the heat exchange, the temperature of the gaseous refrigerant increases, and the temperature of the refrigerant flowing in the heat exchange component 6 decreases, so that the temperature of the refrigerant entering the compressor 300 can be increased, and the temperature of the refrigerant flowing into the throttling device 500 can be reduced, thereby improving the refrigeration effect of the evaporator 200.

[0093] In the heating mode, the high-temperature gaseous refrigerant flowing out of the compressor 300 enters the condenser 400 for heat exchange, is throttled by the throttling device 500, flows through the heat exchange component 6 in the gas-liquid separator 100, and then enters the evaporator 200 for heat exchange. The gas-liquid two-phase refrigerant flowing out of the evaporator 200 enters the gas-liquid separator 100. After gas-liquid separation in the gas-liquid separator 100, the refrigerant flows into the compressor, completing a heat exchange cycle.

[0094] Since the heat exchange component 6 and the gas-liquid distribution component 5 are both arranged in the gas-liquid separator 100, the heat exchange component 6 and the gaseous refrigerant after heat exchange will exchange heat with the liquid refrigerant stored in the first cylinder 1. The liquid refrigerant that should be stored in the first cylinder 1 may be vaporized after heat exchange, and then enter the compressor, and then enter the heat exchange cycle, which may affect the performance of the thermal management system. In the present application, at least the second part of the first cylinder 1 has a heat insulation function, which can reduce the heat exchange between the liquid refrigerant in the first cylinder 1 and the heat exchange component 6 and the gaseous refrigerant in the first cavity 10, thereby ensuring the heat exchange performance of the thermal management system.

[0095] When the diameter of the second cylinder 2 remains unchanged, the design of the heat exchange component 6 will affect both the volume of the first cylinder 1 and the heat exchange capacity of the heat exchange component 6. When the volume of the heat exchange component 6 is large, the heat exchange performance of the heat exchange component 6 is good, but since the volume of the second cylinder 2 of the gas-liquid separator 100 is constant, when the volume of the heat exchange component 6 is large, it is necessary to reduce the volume of the first cylinder 1 to complete the assembly. At this time, the volume of the first cylinder 1 is relatively small. Since the heat exchange performance of the heat exchange component 6 is good, the temperature of the refrigerant entering the compressor 300 is high at this time, and the temperature of the refrigerant before throttling in the refrigeration mode is also low, the heat exchange performance of the thermal management system is better, but due to the small volume of the first cylinder 1, the gas-liquid separation effect of the gas-liquid separation component 5 is poor, and the liquid storage capacity of the first cylinder 1 is small, more liquid will enter the compressor 300, which will cause "liquid hammer" phenomenon and damage the compressor. If the volume of the heat exchange assembly 6 is reduced in order to increase the volume of the first cylinder 1, the heat exchange performance of the heat exchange assembly 6 is poor, the benefits brought to the heat exchange performance of the thermal management system are small, and the heat exchange efficiency is relatively low. Therefore, it is necessary to balance the volume of the heat exchange assembly 6 and the volume of the first cylinder 1 (that is, the liquid storage volume of the first cylinder 1) so that the two can achieve a better match.

[0096] The heat exchange performance of the heat exchange assembly 6 is related to the volume of the heat exchange assembly 6, and the volume of the heat exchange assembly 6 affects the thickness of the core body. That is, when the header is larger, the volume of the heat exchange assembly 6 is also larger, and the heat exchange performance of the heat exchange assembly 6 is also better. Since the header is arranged between the first cylinder 1 and the second cylinder 2, the header will affect the volume of the first cylinder 1.

[0097] In the present application, the outer diameter of the first manifold is greater than or equal to the outer diameter of the second manifold, and the value range of the angle R1 related to the outer diameter of the first manifold 61 is 5°≤R1≤120°. Within this value range, the heat exchange performance of the heat exchange component and the liquid storage volume of the first cylinder 1 can be well balanced, so that the two can achieve a better match, thereby improving the performance of the thermal management system. Since the heat exchange component 6 also includes a second manifold 62, the value range of the angle R2 related to the second manifold 62 is further set to 5°≤R2≤120°, which can better balance the heat exchange performance of the heat exchange component and the liquid storage volume of the first cylinder 1.

[0098] It should be understood in the present application that the first fluid and the second fluid are both refrigerants, the first fluid is the refrigerant flowing out of the evaporator 200 , and the second fluid is the refrigerant flowing out of the condenser 400 or the throttling device 500 .

[0099] The above is only a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Although the present application has been disclosed as a preferred embodiment as above, it is not intended to limit the present application. Any technician familiar with the profession can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present application. However, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application still falls within the scope of the technical solution of the present application.

Claims

1. A gas-liquid separator, characterized in that: include: A first cylinder (1), a second cylinder (2), and a heat exchange assembly (6), wherein the first cylinder (1) is located inside the second cylinder (2), the gas-liquid separator (100) has a first cavity (10), the first cavity (10) is located inside the second cylinder (2), and the first cavity (10) is located outside the first cylinder (1); At least part of the heat exchange component (6) is located in the first chamber (10), the heat exchange component (6) comprises a first header (61), the first header (61) extends in a direction parallel to the axis of the first cylinder (1), the first header (61) is located between the first cylinder (1) and the second cylinder (2), at least part of the side wall of the first cylinder (1) is recessed inwards to form a first recess, and the first header (61) is arranged corresponding to the first recess; The first cylinder (1) and the first collector (61) have projections on a first plane, the first plane being perpendicular to the axis of the first cylinder (1), and on the first plane, the projection of the first recess is in a U shape, and the projection of the first collector (61) is at least partially accommodated in the U-shaped space of the projection of the first recess; The first cylinder (1) comprises two second recesses, the recessed direction of the second recesses is opposite to that of the first recesses, along the circumferential direction of the first cylinder (1), at least part of the first collecting pipe (61) is located between the two second recesses, the first recess is located between the cavities of the two second recesses, the cavity of one of the second recesses is located between a side wall of the first recess and other parts of the first cylinder (1), and the cavity of the other second recess is located between a side wall of the first recess and other parts of the first cylinder (1), and the inner cavity of the first cylinder (1) comprises the cavities of the two second recesses; The heat exchange assembly (6) comprises a second header (62), the second header (62) extending in a direction parallel to the axis of the first cylinder (1), the second header (62) being located between the first cylinder (1) and the second cylinder (2), and the outer contours of the first header (61), the second header (62) and the second cylinder (2) projected on the first plane are all circular; On the first plane, the center of the outer contour of the projection of the second cylinder (2) is marked as A, the midpoint of the line connecting the center of the outer contour of the projection of the first header (61) and the center of the outer contour of the projection of the second header (62) is marked as B, and the line connecting point A to point B and its extension line form a ray LI; The outer contour of the projection of the first collector (61) has a tangent point marked as C, point C is located on the side of the first collector (61) away from the ray L1, the tangent line from point A to point C and its extension line form a ray L2, an angle R1 is formed between L1 and L2, and the value range of the angle R1 is 5°≤R1≤120°; The outer contour of the projection of the second collector (62) has a tangent point marked as D, point D is located on the side of the second collector (62) away from the ray L1, the tangent line from point A to point D and its extension line form a ray L3, an angle R2 is formed between L1 and L3, and the value range of the angle R2 is 5°≤R2≤120°.

2. A gas-liquid separator as claimed in claim 1, characterized in that: The heat exchange assembly (6) comprises a second header (62), the second header (62) extending in a direction parallel to the axis of the first cylinder (1), the second header (62) being located between the first cylinder (1) and the second cylinder (2), the first header (61) and the second header (62) being arranged in parallel, the second header (62) being arranged corresponding to the first recess, and on the first plane, a projection of the second header (62) being at least partially accommodated in a U-shaped space of a projection of the first recess.

3. A gas-liquid separator as claimed in claim 1, characterized in that: On the first plane, the diameter of the outer contour of the projection of the first collecting pipe (61) is D1, 8 mm ≤ D1 ≤ 16 mm; the diameter of the outer contour of the projection of the second collecting pipe (62) is D2, 8 mm ≤ D2 ≤ 16 mm; the diameter of the outer contour of the projection of the second cylinder (2) is D3, 50 mm ≤ D3 ≤ 100 mm; The first current collecting pipe (61) and the second current collecting pipe (62) are arranged in parallel and tangentially, the value range of the angle R1 is 10°≤R1≤60°, and the value range of the angle R2 is 10°≤R2≤60°.

4. A gas-liquid separator as claimed in claim 3, characterized in that: The outer surface of the first collecting pipe (61) is tangent to the inner surface of the second cylinder (2), the outer surface of the second collecting pipe (62) is tangent to the inner surface of the second cylinder (2), the outer surface of the first collecting pipe (61) is tangent to the outer surface of the second collecting pipe (62), the value range of the angle R1 is 10°≤R≤56°, and the value range of the angle R2 is 10°≤R2≤56°.

5. A gas-liquid separator as claimed in claim 3, characterized in that: The gas-liquid separator (100) further comprises a sleeve (53) having a circular cross-sectional shape, the sleeve (53) being located inside the first cylinder (1), the center of the projection of the sleeve (53) coinciding with the center of the projection of the second cylinder (2) on a first plane, the diameter of the outer contour of the projection of the sleeve (53) being D4, 16 mm≤D4≤25 mm, 0.15≤D4 / D3≤0.5; The outer surface of the first current collecting pipe (61) is arranged substantially tangent to the outer surface of the sleeve (53), the outer surface of the second current collecting pipe (62) is arranged substantially tangent to the outer surface of the sleeve (53), the outer surface of the first current collecting pipe (61) is arranged tangent to the outer surface of the second current collecting pipe (62), the value range of the angle R1 is 28°≤R1≤60°, and the value range of the angle R2 is 28°≤R2≤60°.

6. A gas-liquid separator as claimed in claim 1, characterized in that: On the first plane, the diameter of the outer contour of the projection of the first collecting pipe (61) is D1, 8 mm ≤ D1 ≤ 16 mm; the diameter of the outer contour of the projection of the second collecting pipe (62) is D2, 8 mm ≤ D2 ≤ 16 mm; the diameter of the outer contour of the projection of the second cylinder (2) is D3, 50 mm ≤ D3 ≤ 100 mm; Along a direction parallel to the axis of the first cylinder (1), the first collecting pipe (61) and the second collecting pipe (62) are arranged in parallel; on a first plane, the center of the projection of the first collecting pipe (61) coincides with the center of the projection of the second collecting pipe (62); the value range of the angle R1 is 5°≤R1≤30°; and the value range of the angle R2 is 5°≤R2≤30°.

7. A gas-liquid separator as claimed in claim 1, characterized in that: The diameter of the projected outer contour of the first collecting pipe (61) is D1, 8 mm ≤ D1 ≤ 16 mm; the diameter of the projected outer contour of the second collecting pipe (62) is D2, 8 mm ≤ D2 ≤ 16 mm; the diameter of the projected outer contour of the second cylinder (2) is D3, 50 mm ≤ D3 ≤ 100 mm; On the first plane, the center of the projection of the first collecting pipe (61) and the center of the projection of the second collecting pipe (62) do not overlap, the value range of the angle R1 is 5°<R1≤120°, and the value range of the angle R2 is 5°<R1≤120°.

8. A gas-liquid separator as claimed in claim 2, characterized in that: The gas-liquid separator (100) further comprises a first flow guide portion (3), a second flow guide portion (4) and a gas-liquid distribution assembly (5); the gas-liquid separator (100) comprises a second chamber (20) connected to the first chamber (10); the second chamber (20) comprises at least a space located in the first cylinder (1); The heat exchange assembly (6) further comprises a heat exchange tube (63) and a heat exchange element (64), wherein the heat exchange element (64) is connected to the heat exchange tube (63), and the heat exchange tube (63) and the heat exchange element (64) are both arranged around a portion of the first cylinder (1); one end of the heat exchange tube (63) is connected to the first header (61), and the other end is connected to the second header (62); the inner cavity of the heat exchange tube (63) communicates with the inner cavity of the first header (61) and the inner cavity of the second header (62); along the arrangement direction of the first header (61) and the second header (62), a portion of the first cylinder (1) is located between the heat exchange tube (63) and the first header (61), and another portion of the first cylinder (1) is located between the heat exchange tube (63) and the second header (62); The first flow guide portion (3) is fixedly arranged on the second cylinder (2); the first flow guide portion (3) has a third cavity (30), and the third cavity (30) is communicated with the first cavity (10); The second flow guide portion (4) is fixedly arranged on the second cylinder (2), the first flow guide portion (3) and the second flow guide portion (4) are located on two opposite sides of the second cylinder (2), and the second flow guide portion (4) is in communication with the first chamber (10) and the outside of the gas-liquid separator (100); The gas-liquid distribution assembly (5) comprises a flow guide tube (51), a connecting tube (52) and a sleeve (53); at least a portion of the flow guide tube (51) is located in the second chamber (20); the flow guide tube (51) is fixedly arranged with the first flow guide portion (3); at least a portion of the connecting tube (52) is located in the third chamber (30); the connecting tube (52) is fixedly arranged with the first flow guide portion (3); the sleeve (53) is sleeved on the outside of the flow guide tube (51); the sleeve (53) is fixedly arranged with the flow guide tube (51); one end of the flow guide tube (51) is in communication with the third chamber (30) and the other end is in communication with the second chamber (20); one end of the connecting tube (52) is in communication with the second chamber (20) and the other end is in communication with the outside of the gas-liquid separator (100); and one end of the sleeve (53) close to the first flow guide portion (3) is in communication with the second chamber (20).

9. A thermal management system, characterized in that: The thermal management system comprises a gas-liquid separator (100) as claimed in any one of claims 1 to 8, and further comprises an evaporator (200), a compressor (300), a condenser (400) and a throttling device (500), wherein a gas-liquid distribution component (5) is connected between the evaporator (200) and the compressor (300), and the heat exchange component (6) is connected between the condenser (400) and the throttling device (500).

Images