Header assembly and heat exchanger

Abstract

The header assembly comprises a header part and a flow guide part, the header part comprises a first cavity and a second cavity, the first cavity comprises an opening, the flow guide part comprises a flow guide channel, the flow guide channel can communicate with the first cavity and the second cavity, and the flow guide part comprises a first communicating part, a second communicating part and a third communicating part; in the extension direction of the header assembly, the second communication part is located between the first communication part and the third communication part, the flow guide channel can communicate with the first cavity through the first communication part and the second communication part, and the flow guide channel can communicate with the second cavity through the third communication part. And in the extension direction of the header assembly, the second communication part is arranged close to the opening.

Description

Technical Field

[0001] The present application relates to the field of refrigeration, and in particular to a header assembly and a heat exchanger. Background Art

[0002] The heat exchanger includes a header and heat exchange tubes. The heat exchange tubes are inserted into the header. When the heat exchanger is used as an evaporator, the refrigerant flows into the heat exchange tubes after passing through the header for heat exchange with the material outside the heat exchange tubes.

[0003] When the heat exchanger is used as an evaporator, two-phase refrigerant generally enters the manifold. Under the action of gravity, the two-phase refrigerant will separate into gas and liquid in the manifold. The gaseous refrigerant flows upward into the upper heat exchange tube, and the liquid refrigerant flows downward into the lower heat exchange tube. This will cause the heat exchange of the upper heat exchange tube to be weak, greatly reducing the heat exchange effect of the heat exchanger. Summary of the invention

[0004] The purpose of the present application is to provide a header assembly and a heat exchanger that effectively improve the mixing uniformity of gas-liquid two-phase refrigerants.

[0005] On the one hand, the present application provides a manifold assembly, including a manifold part and a guide part, the manifold part including a first cavity and a second cavity, the first cavity including an opening, the guide part including a guide channel, the guide channel can connect the first cavity and the second cavity, the guide part includes a first connecting part, a second connecting part and a third connecting part, in the extension direction of the manifold assembly, the second connecting part is located between the first connecting part and the third connecting part, the guide channel can connect the first cavity through the first connecting part and the second connecting part, the guide channel can connect the second cavity through the third connecting part, and in the extension direction of the manifold assembly, the second connecting part is arranged close to the opening.

[0006] By setting a guide part connecting the first cavity and the second cavity, and providing the first connecting part, the second connecting part and the third connecting part in the guide part, the guide channel can be connected to the first cavity through the first connecting part and the second connecting part, and connected to the second cavity through the third connecting part, and the second connecting part is arranged close to the opening, the gas-liquid mixed refrigerant flowing in from the opening enters the guide channel through the second connecting part, a part of the refrigerant flows into the first cavity through the first connecting part along the guide channel, and another part of the refrigerant flows into the second cavity through the third connecting part along the guide channel, the refrigerant flowing into the first cavity through the first connecting part and the part of the gaseous refrigerant in the first cavity form convection, the pressure of the first cavity close to the first connecting part is reduced, so that the gas-liquid refrigerant flowing in from the opening can be closer to the first connecting part, the uniformity of the gas-liquid state of the refrigerant in the first cavity is effectively improved, and the heat exchange performance of the heat exchanger is improved.

[0007] Another aspect of the present application provides a heat exchanger, comprising a plurality of heat exchange tubes and a header assembly, wherein the header assembly comprises a header portion, the header portion comprises a first cavity and a second cavity, the heat exchange tubes are arranged along an extension direction of the header assembly, the heat exchange tubes comprise refrigerant channels, a portion of the refrigerant channels of the heat exchange tubes are connected to the first cavity, and another portion of the refrigerant channels of the heat exchange tubes are connected to the second cavity; the header assembly comprises a guide portion, the guide portion comprises a guide channel, the guide channel can connect the first cavity and the second cavity, the guide portion comprises a first connecting portion, a second connecting portion and a third connecting portion, the guide channel can connect the first cavity through the first connecting portion and the second connecting portion, the guide channel can connect the second cavity through the third connecting portion, the first cavity comprises an opening, and in the extension direction of the header assembly, the second connecting portion is closer to the opening than the first connecting portion.

[0008] By setting a guide portion connecting the first cavity and the second cavity on the collecting tube assembly connecting the heat exchange tubes, and opening the first connecting portion, the second connecting portion and the third connecting portion in the guide portion, the guide channel can be connected to the first cavity through the first connecting portion and the second connecting portion, and connected to the second cavity through the third connecting portion, and the second connecting portion is arranged close to the opening, the gas-liquid mixed refrigerant flowing in from the opening enters the guide channel through the second connecting portion, a part of the refrigerant flows into the first cavity through the first connecting portion along the guide channel, and another part of the refrigerant flows into the second cavity through the third connecting portion along the guide channel, the refrigerant flowing into the first cavity through the first connecting portion and part of the gaseous refrigerant in the first cavity form convection to achieve dynamic balance, so that the refrigerant close to the first connecting portion flows out along the refrigerant channel of the heat exchange tube, so that the gas-liquid two-state refrigerant in the first cavity can be closer to the first connecting portion, the proportion of the gaseous refrigerant in the first cavity is reduced, and the heat exchange performance of the heat exchanger is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 A schematic structural diagram of an embodiment of a header assembly of the present application; Figure 2 It is a structural schematic diagram of another embodiment of the header assembly of the present application; Figure 3 This is a structural schematic diagram of another embodiment of the header assembly of the present application; Figure 4 A schematic structural diagram of an embodiment of an isolation portion of a header assembly of the present application; Figure 5 for Figure 4 A schematic diagram of the cross-sectional structure of the isolation portion; Figure 6 is a schematic cross-sectional structure diagram of another embodiment of the header assembly in a certain use state; Figure 7This is a schematic structural diagram of an embodiment of a heat exchanger of the present application. Attached photos

[0010] 100, manifold assembly; 1, manifold; 2, flow guide; 11, first cavity; 12, second cavity; 111, opening; 21, flow guide channel; 22, first connecting portion; 23, second connecting portion; 24, third connecting portion; 3, isolating portion; 13, first end portion; 14, second end portion; 13', first end cover; 14', second end cover; 4, flow guide; 41, flow guide channel; 42, first port; 43, second port; 31, hole; 311, connecting hole; 312, first orifice portion; 313, second orifice portion; 26, tube wall; 25, stopper; 32, second orifice portion; 321, second through hole; 200, heat exchanger; 201, heat exchange tube; 15, plug interface; 202, diverter; 2021, first port; 2022, second port. Example

[0011] 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.

[0012] 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 "one" do not indicate a quantity limitation, but indicate the existence of at least one; "several" means two or more quantities, unless otherwise specified. The directional words such as upper, lower, left, right, front, back, inside, outside, top, bottom, etc. mentioned or may be mentioned in the text are defined relative to the structure shown in the corresponding drawings. They are relative concepts, so they may change accordingly according to their different positions and different usage states. Therefore, these or other directional terms should not be interpreted as restrictive terms. "Include" or "comprise" and similar words mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects.

[0013] The valve device 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.

[0014] The following is combined with Figure 1 To Attachment Figure 6 Some embodiments of the header assembly are described in detail.

[0015] like Figures 1 to 6 The manifold assembly 100 includes a manifold portion 1 and a guide portion 2. The manifold portion 1 includes a first cavity 11 and a second cavity 12. The first cavity 11 includes an opening 111. The guide portion 2 includes a guide channel 21. The guide channel 21 can connect the first cavity 11 and the second cavity 12. The guide portion 2 includes a first connecting portion 22, a second connecting portion 23 and a third connecting portion 24. In the extension direction of the manifold assembly 100, the second connecting portion 23 is located between the first connecting portion 22 and the third connecting portion 24. The guide channel 21 can connect the first cavity 11 through the first connecting portion 22 and the second connecting portion 23. The guide channel 21 can connect the second cavity 12 through the third connecting portion 24. In the extension direction of the manifold assembly 100, the second connecting portion 23 is arranged close to the opening 111. Furthermore, the flow cross-sectional area of ​​the guide channel 21 is smaller than the flow cross-sectional area of ​​the first cavity 11 . Such a design enables the refrigerant entering the guide channel 21 through the second connecting portion 23 to quickly climb along the thinner guide channel 21 to reach the first connecting portion 22 , and be ejected through the opening of the first connecting portion 22 .

[0016] Furthermore, if Figure 1 and Figure 6 , the first cavity 11 and the second cavity 12 are isolated. Specifically, the manifold assembly 100 includes a partition 3. Along the extension direction of the manifold assembly 100, the manifold 1 includes a first end 13 and a second end 14. The partition 3 is arranged between the first end 13 and the second end 14. Along the extension direction of the manifold assembly 100, the first cavity 11 is located on one side of the partition 3, and the second cavity 12 is located on the other side of the partition 3. It can also be said that the partition 3 divides the manifold 1 into at least the first cavity 11 and the second cavity 12. Along the extension direction of the manifold assembly 100, the first cavity 11 is located on one side of the partition 3, and the second cavity 12 is located on the other side of the partition 3. In the direction, the isolation portion 3 is closer to the opening 111 than the first end portion 13. Specifically, the opening 111 is arranged close to the isolation portion 3. In some application environments, the first end portion 13 is located above the second end portion 14, and the opening 111 is arranged close to the bottom of the first cavity 11. Due to the effect of gravity, the liquid refrigerant is more concentrated in the cavity close to the isolation portion 3. When the gas-liquid refrigerant enters the first cavity 11 through the opening 111, it can disturb the liquid refrigerant close to the isolation portion 3, thereby achieving the effect of mixing the gas-liquid refrigerant.

[0017] Furthermore, the volume of the first chamber 11 is greater than that of the second chamber 12. Specifically, the volume of the first chamber 11 is defined as Q1, and the volume of the second chamber 12 is defined as Q2, wherein 0.5≤Q1 / (Q1+Q2)≤0.9. Because the dryness of the refrigerant at the evaporator inlet is generally below 0.5, when the above ratio is less than 0.5, the volume of the first chamber 11 is too small, and a large amount of two-phase refrigerant will be brought into the second chamber 12, and obvious gas-liquid stratification will occur inside the refrigerant in the second chamber 12 along the gravity direction. When the ratio is greater than 0.9, the volume of the first chamber 11 is too large. Even if some refrigerant rises along the guide portion 2 and enters the first end portion 13 of the first chamber 11, the volume of the first chamber 11 is relatively large, and a large amount of gaseous refrigerant is gathered outside the guide portion 2. The small amount of gas-liquid mixed refrigerant drawn out of the guide portion 2 has little effect on the gaseous refrigerant, and the uneven distribution phenomenon in the first chamber 11 is still serious.

[0018] Further, the flow cross-sectional area of ​​the second connecting portion 23 is greater than the flow cross-sectional area of ​​the third connecting portion 24, and the center line of the flow cross-sectional area of ​​the third connecting portion 24 coincides with the center line of the guide portion 2. Specifically, Figure 1 The second connecting portion 23 and the third connecting portion 24 are one or a plurality of connecting holes arranged at intervals, and the connecting holes can be circular, square, polygonal, etc. Of course, in another embodiment, as Figure 6 The second connecting portion 23 and the third connecting portion 24 are one or multiple connecting holes arranged at intervals, and the connecting holes are long holes. Such a structural arrangement helps to accelerate the refrigerant flowing from the guide channel 21 to the third connecting portion 24. The accelerated refrigerant rushes out through the third connecting portion 24, which has a certain disturbing effect on the refrigerant at the bottom of the second cavity 12, thereby improving the gas-liquid mixing uniformity of the refrigerant in the second cavity 12.

[0019] like Figure 1 and Figure 6The first cavity 11 and the second cavity 12 can be connected through the guide channel 21. Specifically, the guide channel 21 can be connected to the first cavity 11 through the first connecting portion 22 and the second connecting portion 23. The first connecting portion 22 and the second connecting portion 23 are arranged on the guide portion 2. In some embodiments, the first connecting portion 22 and the second connecting portion 23 are connecting holes. The first connecting portion 22 is closer to the first end portion 13 than the second connecting portion 23. Further, along the extension direction of the manifold assembly 100, the second connecting portion 23 is closer to the opening 111 than the first connecting portion 22. It can also be said that the second connecting portion 23 is closer to the isolation portion 3 than the first connecting portion 22. In some In the application environment, the first end 13 is located above the second end 14. Under the action of gravity, the gaseous refrigerant in the first cavity 11 is close to the first end 13, and the liquid refrigerant is close to the isolation portion 3. The second connecting portion 23 is arranged close to the opening 111, which helps the gas-liquid mixed refrigerant entering from the opening 111 to enter the guide channel 21 through the second connecting portion 23, thereby guiding the refrigerant to the first end 13 and / or the second end 14. In addition, the second connecting portion 23 is closer to the isolation portion 3, which helps part of the liquid refrigerant to enter the guide channel 21 together with the gas-liquid mixed refrigerant, thereby achieving uniform mixing of the refrigerants in the first cavity 11 and the second cavity 12.

[0020] like Figure 1 and Figure 6 , in a direction perpendicular to the extension direction of the header assembly 100, the opening 111 is provided on the wall of the header portion 1 on the peripheral side of the second connecting portion 23, further, as Figure 1 , the opening 111 and the opening of the second connecting portion 23 are arranged opposite to each other, or in other words, a plane perpendicular to the extension direction of the header assembly 100 is defined as a plane P, and the center line L1 of the opening 111 and the center line L2 of the flow cross section of the second connecting portion 23 are both located on the plane P. Of course, as Figure 6, the opening 111 and the opening of the second connecting portion 23 are arranged at an angle, or in other words, the center line L1 of the opening 111 and the center line L2 of the flow cross section of the second connecting portion 23 are arranged at an angle, and further, the center line L1 of the opening 111 and the center line L2 of the second connecting portion 23 coincide with each other; by arranging the opening 111 and the second connecting portion 23 relative to each other or arranging the opening 111 on the peripheral side of the second connecting portion 23, when the gas-liquid refrigerant enters the first cavity 11 through the opening 111, since the opening 111 is close to the second connecting portion 23, part of the gas-liquid refrigerant enters the guide channel 2 through the second connecting portion 23. 1, a part of the refrigerant flows into the first cavity 11 through the first connecting portion 22. At the first end 13 of the manifold 1, the gas-liquid mixed refrigerant flowing into the first cavity 11 through the first connecting portion 22 and the refrigerant entering the first cavity 11 through the opening 111 form convection, and a dynamic balance is achieved, so that the refrigerant located at the first end 13 flows out along the tube cavity of the heat exchange tube connected to the manifold assembly 100, and the pressure of the first end 13 is reduced, so that the gas-liquid refrigerant near the opening 111 can be closer to the first end 13, effectively improving the uniformity of the gas-liquid refrigerant in the first cavity 11, and improving the heat exchange performance of the heat exchanger.

[0021] like Figure 1 , along the extension direction of the header assembly 100, the second connecting portion 23 is located between the first connecting portion 22 and the third connecting portion 24, and the guide channel 21 can be connected to the second cavity 12 through the third connecting portion 24. Specifically, the third connecting portion 24 is close to the second end 14, and part of the refrigerant entering the guide channel 21 through the second connecting portion 23 can enter the second cavity 12 through the third connecting portion 24. In some application environments, the first end 13 is located above the second end 14. Further, the header assembly 100 is arranged in a vertical direction, and the extension direction of the header assembly 100 is the vertical direction. Since the opening 111 is close to the second connecting portion 23, part of the gas-liquid two-state refrigerant enters the guide channel 21 through the second connecting portion 23, and part of the gas-liquid mixed state refrigerant entering the guide channel 21 enters the second cavity 12 through the third connecting portion 24, and then enters the tube cavity of the heat exchange tube connected with the second cavity 12 for heat exchange. Furthermore, the third connecting portion 24 is close to the second end portion 14, so the refrigerant flowing out of the third connecting portion 24 has a disturbing effect on the refrigerant in the second cavity 12, which is beneficial to further uniform mixing of the refrigerant in the second cavity 12 and improving the heat exchange efficiency of the heat exchanger.

[0022] like Figure 2 and Figure 3The manifold assembly 100 includes a drainage portion 4, which communicates with the first cavity 11 and the second cavity 12. Specifically, the drainage portion 4 includes a drainage channel 41, a first port 42, and a second port 43. The drainage channel 41 communicates with the first cavity 11 through the first port 42, and the drainage channel 41 communicates with the second cavity 12 through the second port 43. Further, along the extension direction of the manifold assembly 100, the first port 42 is closer to the isolation portion 3 than the opening 111, and the second port 43 is closer to the isolation portion 3 than the third connecting portion 24. By providing the drainage portion 4, part of the refrigerant in the first cavity 11 can be drained to the second cavity 12 through the drainage portion 4. Specifically, as shown in FIG. Figure 3 , the drainage portion 4 passes through the isolating portion 3 and is fixedly connected to the isolating portion 3, or the drainage portion 4 and the isolating portion 3 are an integral part. In some application environments, the first end 13 is located above the second end 14, the upper end of the drainage portion 4 is located in the first cavity 11, and the lower end of the drainage portion 4 is located in the second cavity 12. Along the extension direction of the manifold assembly 100, the drainage portion 4 protrudes from the two sides of the isolating portion 3, so that the first port 42 is exposed to the first cavity 11, and the second port 43 is exposed to the second cavity 12. By arranging the drainage portion 4 in the manifold assembly 100, the first cavity 11 and the second cavity 12 are connected through the drainage portion 4, so that part of the liquid refrigerant in the lower part of the first cavity 11 can be drained to the second cavity 12, and the third connecting portion 24 is arranged below the second port 43, and the liquid refrigerant flowing into the second cavity 12 can be impacted by the gas-liquid mixed refrigerant flowing out of the third connecting portion 24 to generate disturbance, which is helpful for further gas-liquid mixing and achieving uniform gas-liquid mixing.

[0023] like Figure 4 and Figure 5 Further, the isolation portion 3 includes a first hole portion 31, the first hole portion 31 includes a first through hole 311, the first through hole 311 connects the first cavity 11 and the second cavity 12, along the extension direction of the manifold assembly 100, the first hole portion 31 includes a first orifice portion 312 and a second orifice portion 313, the first orifice portion 312 is closer to the second cavity 12 than the opening 111, further, the guide portion 2 is tubular, at least part of the guide portion 2 can pass through the connecting hole 311, the outer wall portion of the guide portion 2 and the inner hole wall of the first hole portion 31 are arranged in a close fit, specifically, the guide portion 2 is fixedly connected to the isolation portion 3 through the first hole portion 31, in some embodiments, at least part of the first hole portion 31 protrudes from one side surface of the isolation portion 3, which is beneficial to the axial positioning of the guide portion 2.

[0024] like Figure 1Further, the flow guide 2 includes a tube wall 26 and a limiting portion 25. Along the radial direction of the flow guide 2, the limiting portion 25 protrudes from the tube wall 26 of the flow guide 2. The limiting portion 25 is arranged along the circumferential direction of the flow guide 2. The outer diameter of the limiting portion 25 is greater than the outer diameter of the tube wall 26 of the flow guide 2. Specifically, the limiting portion 25 is formed by extruding the flow guide 2 from both sides. The flow guide 2 can be connected by limiting the limiting portion 25 and the hole portion 31. Further, the isolation portion 3 is fixedly connected to the manifold 1. The flow guide 2 is located in the manifold 1. The manifold 1 includes a mounting groove portion (not shown in the figure). Along the extension direction of the manifold assembly 100, the mounting groove portion is closer to the second end portion 14 than the opening 111. At least part of the isolation portion 3 passes through the mounting groove portion to achieve fixed connection with the manifold 1.

[0025] like Figure 6 The manifold assembly 100 includes a first end cover 13' and a second end cover 14', the first end cover 13' is located at the first end 13, and the second end cover 14' is located at the second end 14. Further, the isolation portion 3 is located between the first end cover 13' and the second end cover 14'. Further, the isolation portion 3 passes through at least a portion of the wall forming the manifold portion 1 and the guide portion 2, the isolation portion 3 includes a second hole portion 32, the second hole portion 32 includes a second through hole 321, and the second through hole 321 is exposed to the guide channel 21, so that the space on both sides of the guide channel 21 is connected.

[0026] The following is combined with Figure 7 An embodiment of a heat exchanger is described in detail.

[0027] like Figure 7 The heat exchanger 200 includes a plurality of heat exchange tubes 201 and a header assembly 100. The structure and working principle of the header assembly 100 refer to the structure assembly 100 introduced above and will not be repeated here.

[0028] like Figure 7 The heat exchange tubes 201 are arranged along the extension direction of the header assembly 100. Specifically, a plurality of plug-in ports 15 are provided on the side of the header 1 facing away from the outlet 111. One end of the heat exchange tube 201 is inserted into the plug-in port 15. The heat exchange tubes 201 are arranged along the extension direction of the header assembly 100. The heat exchange tubes 201 include refrigerant channels (not shown in the figure). The refrigerant channels of some of the heat exchange tubes 201 are connected to the first cavity 11, and the refrigerant channels of another part of the heat exchange tubes 201 are connected to the second cavity 12, so as to achieve the purpose of collecting or distributing the header 1.

[0029] Further, the heat exchanger 200 includes a plurality of header assemblies 100 and a flow divider 202, the flow divider 202 includes a first port 2021 and a plurality of second ports 2022, the first port 2021 is connected to the second port 2022, and the second port 2022 is connected to the openings 111 of the plurality of header assemblies 100, so that the refrigerant flowing in from the first port 2021 can be distributed to each header assembly 100, further, the arrangement direction of the header assembly 100 is the same as the arrangement direction of the heat exchange tube 201, and the plurality of header assemblies 100 are connected end to end, that is, the first end 13 of one header assembly 100 and the adjacent other header assembly 100 are connected. The second end 14 of the assembly 100 is relatively arranged or fixedly connected or is an integral structure. Specifically, in some embodiments, there is a spacing between two adjacent manifold assemblies 100, and other components can be arranged within the spacing, of course, other components may not be arranged; in some embodiments, two adjacent manifold assemblies 100 are fixedly connected by welding, clamping, etc.; in other embodiments, two adjacent manifold assemblies 100 are divided into two manifold assemblies 100 by an isolation piece, that is, the first end 13 of one manifold assembly 100 and the second end 14 of another manifold assembly 100 can be the same component.

[0030] Furthermore, the heat exchanger 200 also includes a header 203, and the other end of the heat exchange tube 201 is connected to the header 203. In some embodiments, the header 203 and the header assembly 100 are arranged in parallel, and the extension direction of the two is consistent with the stacking direction of the heat exchange tube 201.

[0031] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail in this specification with reference to the above embodiments, it should be understood by those skilled in the art that the present invention can still be modified or replaced by equivalents, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A header assembly, characterized in that: The invention comprises a manifold assembly (1) and a flow guide assembly (2), wherein the manifold assembly (1) comprises a first cavity (11) and a second cavity (12), wherein the first cavity (11) comprises an opening (111), and the flow guide assembly (2) comprises a flow guide channel (21), wherein the flow guide channel (21) is capable of connecting the first cavity (11) and the second cavity (12), and wherein the flow guide assembly (2) comprises a first connecting portion (22), a second connecting portion (23) and a third connecting portion (24), wherein in the extending direction of the manifold assembly, the second connecting portion (23) is located between the first connecting portion (22) and the third connecting portion (24), wherein the flow guide channel (21) is capable of connecting the first cavity (11) via the first connecting portion (22) and the second connecting portion (23), and wherein the flow guide channel (21) is capable of connecting the second cavity (12) via the third connecting portion (24), and wherein in the extending direction of the manifold assembly, the second connecting portion (23) is arranged close to the opening (111).

2. The header assembly according to claim 1, characterized in that The manifold assembly comprises a first end (13) and a second end (14), and the manifold assembly comprises an isolating portion (3), wherein the isolating portion (3) is arranged between the first end (13) and the second end (14), and along the extension direction of the manifold assembly, the first cavity (11) is located on one side of the isolating portion (3), and the second cavity (12) is located on the other side of the isolating portion (3), and along the extension direction of the manifold assembly, the isolating portion (3) is closer to the opening (111) than the first end (13).

3. The header assembly according to claim 1 or 2, characterized in that: The volume of the first cavity (11) is greater than the volume of the second cavity (12), the flow cross-sectional area of ​​the flow guide channel (21) is smaller than the flow cross-sectional area of ​​the first cavity (11), and the flow cross-sectional area of ​​the opening (111) is greater than the flow cross-sectional area of ​​the second connecting portion (23).

4. The header assembly according to claim 3, characterized in that The center line of the third connecting portion (24) coincides with the center line of the flow guide portion (2), and the flow cross-sectional area of ​​the second connecting portion (23) is greater than the flow cross-sectional area of ​​the third connecting portion (24).

5. The header assembly according to any one of claims 1 to 4, characterized in that: The manifold assembly comprises a drainage portion (4), the drainage portion (4) communicating with the first cavity (11) and the second cavity (12), the drainage portion (4) comprising a drainage channel (41), a first port (42) and a second port (43), the drainage channel communicating with the first cavity (11) via the first port (42), the drainage channel (41) communicating with the second cavity via the second port (43), along an extension direction of the manifold assembly, the first port (42) is closer to the isolation portion (3) than the opening (111), and the second port (43) is closer to the isolation portion (3) than the third communication portion (24).

6. The header assembly according to any one of claims 2 to 5, characterized in that: The isolation portion (3) comprises a first hole portion (31), the first hole portion (31) comprises a first through hole (311), the first through hole (311) communicates with the first cavity (11) and the second cavity (12), along the extension direction of the header assembly, the first hole portion (31) comprises a first orifice portion (312) and a second orifice portion (313), the first orifice portion (312) is closer to the second cavity (12) than the opening (111), at least part of the flow guide portion (2) can pass through the first through hole (311), and the outer wall portion of the flow guide portion (2) and the hole wall of the first through hole (311) are arranged in close contact with each other; The flow guide portion (2) comprises a tube wall (26) and a limiting portion (25); along the radial direction of the flow guide portion (2), the limiting portion (25) protrudes from the tube wall (26); and the flow guide portion (2) can be connected in a limiting manner via the limiting portion (25) and the hole portion (31).

7. The header assembly according to any one of claims 2 to 5, characterized in that: The isolation portion (3) comprises a second hole portion (32), the second hole portion (32) comprises a second through hole (321), and the second through hole (321) is exposed to the guide channel (21).

8. The header assembly according to claim 6, characterized in that The isolating portion (3) is fixedly connected to the manifold portion (1), the flow guide portion (2) is located in the manifold portion (1), the manifold portion (1) comprises a mounting groove portion, and along the extension direction of the manifold assembly, the mounting groove portion is closer to the second end portion (14) than the opening (111), and at least a portion of the isolating portion (3) passes through the mounting groove portion.

9. A heat exchanger, characterized in that: The heat exchange tubes (201) are provided with a plurality of heat exchange tubes (201) and a header assembly (100), wherein the header assembly comprises a header portion (1), the header portion (1) comprises a first cavity (11) and a second cavity (12), the heat exchange tubes (201) are arranged along the extension direction of the header assembly (100), the heat exchange tubes (201) comprise refrigerant channels, the refrigerant channels of some of the heat exchange tubes (201) are connected to the first cavity (11), and the refrigerant channels of another part of the heat exchange tubes (201) are connected to the second cavity (12); The manifold assembly (100) comprises a flow guide portion (2), the flow guide portion (2) comprising a flow guide channel (21), the flow guide channel (21) being capable of connecting the first cavity (11) and the second cavity (12), the flow guide portion (2) comprising a first connecting portion (22), a second connecting portion (23) and a third connecting portion (24), the flow guide channel (21) being capable of connecting the first cavity via the first connecting portion (22) and the second connecting portion (23), the flow guide channel (21) being capable of connecting the second cavity (12) via the third connecting portion (24), the first cavity (11) comprising an opening (111), and in the extension direction of the manifold assembly, the second connecting portion (23) being closer to the opening (111) than the first connecting portion (22).

10. The heat exchanger according to claim 9, characterized in that The heat exchanger comprises a plurality of header assemblies (100), wherein the header assemblies (100) comprise a first end portion (13) and a second end portion (14); along the extension direction of the header assemblies (100), the first end portion (13) of the header assemblies (100) and the second end portion (14) of the adjacent header assemblies are arranged relative to each other or are fixedly connected or are an integral structure; the header assemblies (100) comprise a partition portion (3); along the extension direction of the header assemblies (100), the partition portion (3) is arranged between the first end portion (13) and the second end portion (14); the first chamber (11) is located on one side of the partition portion (3), and the second chamber (12) is located on the other side of the partition portion (3); along the extension direction of the header assemblies (100), the partition portion (3) is closer to the opening (111) than the first end portion (13).

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