CN211717241U

CN211717241U - Heat exchanger flat tube and heat exchanger with same

Info

Publication number: CN211717241U
Application number: CN202020233327.4U
Authority: CN
Inventors: 魏文建; 王冠军
Original assignee: Zhejiang Dunan Thermal Technology Co Ltd
Current assignee: Zhejiang Dunan Thermal Technology Co Ltd
Priority date: 2020-02-28
Filing date: 2020-02-28
Publication date: 2020-10-20
Anticipated expiration: 2030-02-28

Abstract

The utility model provides a heat exchanger flat tube and a heat exchanger with the same, the heat exchanger flat tube comprises two oppositely arranged plate bodies, a fluid channel is formed between the two plate bodies, a turbulence convex hull is arranged in the fluid channel, and at least one plate body is provided with the turbulence convex hull; along the direction of perpendicular to plate body, the vortex convex closure has relative bottom and the top that sets up, and the bottom is connected with the plate body, and the profile at top and the profile at bottom are oval. Through the utility model provides a technical scheme can solve the relatively poor technical problem of heat exchange efficiency of the flat pipe of heat exchanger among the prior art.

Description

Heat exchanger flat tube and heat exchanger with same

Technical Field

The utility model relates to a heat exchanger technical field particularly, relates to a flat pipe of heat exchanger and have its heat exchanger.

Background

At present, a convex hull structure is arranged in a heat exchanger flat tube in the prior art, and a certain turbulence effect can be caused to a fluid medium in the flat tube through the convex hull structure. However, the convex hull structure in the prior art is mainly a circular convex hull structure, the turbulent flow effect of the circular convex hull structure is limited, and the heat exchange efficiency of the flat pipe of the heat exchanger cannot be well improved.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a flat pipe of heat exchanger and have its heat exchanger to solve the relatively poor technical problem of heat exchange efficiency of the flat pipe of heat exchanger among the prior art.

In order to achieve the above object, according to one aspect of the present invention, a flat heat exchanger tube is provided, the flat heat exchanger tube includes two plate bodies arranged oppositely, a fluid channel is formed between the two plate bodies, a turbulent flow convex hull is arranged in the fluid channel, and a turbulent flow convex hull is arranged on at least one of the plate bodies; along the direction of perpendicular to plate body, the vortex convex closure has relative bottom and the top that sets up, and the bottom is connected with the plate body, and the profile at top and the profile at bottom are oval.

Furthermore, a connecting line of the central point of the top and the central point of the surface where the bottom is located forms a central line, and the central line is perpendicular to the plate body.

Furthermore, the turbulent convex hull also comprises a side wall surface, and the sectional area of the side wall surface is gradually reduced along the direction from the bottom to the top.

Further, the side wall surface is an elliptic cone surface.

Furthermore, the cone angle of the elliptic conical surface is alpha, and alpha is more than 0 and less than or equal to 90 degrees.

Further, the distance between the surface of the top and the bottom is H_L，0＜H_L≤2mm。

Further, the long axis of the surface where the bottom is located is L_x，2mm≤L_x≤6mm。

Further, the minor axis of the plane on which the bottom is located is L_y，1≤L_y≤3mm。

Further, the long axis of the surface where the bottom is located is L_xThe minor axis of the plane of the bottom is L_y，1＜L_x/L_y≤4。

Further, the distance between the central points of two adjacent turbulent convex hulls is D along the flowing direction of the fluid in the fluid channel_h，2mm≤D_h≤8mm。

Further, the distance between the central points of two adjacent turbulent convex hulls along the direction perpendicular to the flowing direction of the fluid in the fluid channel is D_L，2mm≤D_L≤8mm。

According to the utility model discloses an on the other hand provides a heat exchanger, including the flat pipe of heat exchanger, the flat pipe of heat exchanger is the above-mentioned flat pipe of heat exchanger that provides.

Further, the heat exchanger flat pipe is a plurality of, and the heat exchanger still includes: the heat exchanger comprises an inlet collecting pipe, a plurality of heat exchanger flat pipes and a plurality of heat exchanger flat pipes, wherein the plurality of heat exchanger flat pipes are inserted into the inlet collecting pipe at intervals so that fluid in the inlet collecting pipe flows into the plurality of heat exchanger flat pipes; divide the liquid structure, divide the liquid structure to set up in the import collector pipe, divide the structural a plurality of minute liquid mouths that are provided with of liquid, a plurality of minute liquid mouths set up with a plurality of heat exchanger flat tubes one-to-one, and each divides the liquid mouth to set up with the fluid passage intercommunication of corresponding heat exchanger flat tube to make the fluid after dividing the liquid structure to flow into to corresponding heat exchanger flat tube in through dividing the liquid mouth.

Use the technical scheme of the utility model, through be provided with the vortex convex closure on at least one plate body, this vortex convex closure bottom and plate body coupling, the top and the plate body interval of vortex convex closure set up, because the profile at top and the profile of bottom are the ellipse, can carry out the water conservancy diversion through the fluid of top profile and top profile in the fluid passage better to improve the heat exchange efficiency of the flat pipe of heat exchanger. Therefore, through the utility model provides a technical scheme can solve the relatively poor technical problem of heat exchange efficiency of the flat pipe of heat exchanger among the prior art.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a top view of a heat exchanger flat tube according to an embodiment of the present invention;

fig. 2 shows a front view of a heat exchanger flat tube according to an embodiment of the present invention;

FIG. 3 shows a view from A-A in FIG. 2;

fig. 4 shows a distance H between the top and bottom surfaces of the flat tube of the heat exchanger according to an embodiment of the present invention_L；

Fig. 5 shows that the long axis of the face of the bottom place of the flat tube of the heat exchanger provided according to the utility model is L_xAnd the minor axis of the plane of the bottom is L_y；

Fig. 6 shows that according to the present invention, a flow direction of a fluid in the fluid channel is provided for the heat exchanger flat tube, and a distance between central points of two adjacent turbulent convex hulls is D_h；

Fig. 7 shows a schematic structural diagram of a heat exchanger provided according to a second embodiment of the present invention;

fig. 8 shows a schematic partial internal structural diagram of a heat exchanger according to a second embodiment of the present invention;

FIG. 9 shows a side view of the partial structure of FIG. 8;

fig. 10 shows a schematic structural diagram of a liquid separating structure of a heat exchanger according to a second embodiment of the present invention; and

fig. 11 shows a schematic structural diagram of a liquid separation plate of a heat exchanger according to an embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. a plate body; 20. a turbulent convex hull; 21. a bottom; 22. a top portion; 23. a side wall surface; 30. flat tubes of the heat exchanger; 41. an inlet header pipe; 42. an outlet header; 50. a connecting pipe; 60. a liquid separating structure; 61. a liquid separation port; 62. a liquid separating cavity.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

As shown in fig. 1 to 6, the embodiment of the present invention provides a heat exchanger flat tube 30, the heat exchanger flat tube 30 includes two plate bodies 10 that are arranged relatively, a fluid channel is formed between the two plate bodies 10, a turbulent convex hull 20 is arranged in the fluid channel, and the turbulent convex hull 20 is arranged on at least one plate body 10. The spoiler convex 20 has a bottom 21 and a top 22 opposite to each other in a direction perpendicular to the plate body 10, the bottom 21 is connected to the plate body 10, and the top 22 and the bottom 21 have an elliptical shape. Specifically, the top 22 and the bottom 21 of the spoiler convex 20 may be both planar structures. The plate body 10 and the turbulence convex hulls 20 in the plate embodiment can be integrally formed by stamping, so that the manufacturing is convenient; or the plate body 10 and the turbulator protrusion 20 may be formed as separate structures, and they are connected by welding or other processes.

Adopt the flat pipe 30 of heat exchanger in this embodiment, because the top 22 profile and the bottom 21 profile of this vortex convex closure 20 are oval, and oval-shaped major axis direction is unanimous with the length direction of plate body 10 (the length direction along plate body 10 has relative first end and the second end that sets up, first end is the inflow end, the second end is the outflow end), can carry out the water conservancy diversion to the fluid in the fluid passage better like this, strengthen the torrent that the refrigerant flows, increase flow area, improve the refrigerant velocity of flow, thereby heat transfer performance has been increased, thereby be convenient for improve the heat exchange efficiency of the flat pipe 30 of heat exchanger. Therefore, through the flat pipe 30 of heat exchanger that this embodiment provided, can solve the lower technical problem of heat exchange efficiency of the flat pipe 30 of heat exchanger among the prior art.

Specifically, when only being provided with the protruding package of vortex 20 on a plate body 10, the protruding package of vortex 20 on a plate body 10 will carry out the butt with another plate body 10, carries out the vortex to the fluid under the effect of the protruding package of vortex 20 to accelerate heat exchange efficiency. When the two plate bodies 10 are provided with the turbulent convex hulls 20, the turbulent convex hulls 20 on one plate body 10 are abutted with the turbulent convex hulls 20 on the other plate body 10, and the heat exchanger flat pipes 30 can better disturb fluid under the action of the two turbulent convex hulls 20 when working, so that the heat efficiency can be better changed quickly.

In this embodiment, the two plate bodies 10 are provided with the turbulent convex hull 20, and the two plate bodies 10 are symmetrically arranged and welded to form the heat exchanger flat tube 30 after being assembled. A plurality of turbulent convex hulls 20 are arranged on the first plate body 10 and the second plate body 10, and the plurality of turbulent convex hulls 20 form an array distribution structure, so that fluid can be well disturbed, and the heat exchange performance can be stably improved.

In this embodiment, the top portion 22 and the bottom portion 21 may be both planar structures, so that a connecting line between a central point of the top portion 22 and a central point of a surface of the bottom portion 21 forms a central line, and the central line is perpendicular to the plate body 10, so as to better perform heat conduction and heat exchange.

Specifically, the spoiler convex 20 in this embodiment further includes a sidewall surface 23, the sidewall surface 23 is disposed between the bottom portion 21 and the top portion 22, one end of the sidewall surface 23 is connected to the bottom portion 21, and the other end of the sidewall surface 23 is connected to the top portion 22. The sectional area of the side wall surface 23 is gradually reduced in the direction from the bottom portion 21 to the top portion 22. By adopting the arrangement, the outline of the bottom 21 and the outline of the top 22 are both elliptical, and the side wall surface 23 is of a gently transitional structure, so that kinetic energy loss caused by large impact change of fluid can be avoided, and the fluid is guided better to improve the heat exchange effect.

In this embodiment, the side wall surface 23 is an elliptical conical surface, and by adopting such a structure, the elliptical conical surface is similar to the effect of an arc surface, and the elliptical conical surface is integrally a smooth transition structure, so that the elliptical conical surface is taken as a flow guide surface to better guide the motion of a fluid, thereby improving the heat exchange effect.

In this embodiment, the taper angle of the elliptical cone is α (i.e. the angle of the spoiler convex 20), and α is greater than 0 and less than or equal to 90 °. By adopting the arrangement, when the cone angle of the elliptic conical surface is excessively set, the flow guiding effect is influenced, and the influence on the fluid is small. And through setting to above-mentioned angle scope, can improve water conservancy diversion efficiency to improve the water conservancy diversion effect better.

Specifically, the distance between the top 22 and the bottom 21 in this embodiment is H_L(i.e. the depth of punching) 0 < H_LLess than or equal to 2 mm. When the distance is set to be too large, the distance between the two plate bodies 10 is set to be too large, so that the flow area of the fluid is increased, but it is not favorable for sufficiently flowing the fluidThe fluid in the heat exchanger is guided and exchanges heat, thereby influencing the heat exchange efficiency. And the distance between the surface of the top 22 and the surface of the bottom 21 is set to be within the range, so that the flow guide efficiency can be improved, and the heat exchange effect can be better improved.

In the present embodiment, the major axis of the surface on which the bottom 21 is located is L_x，2mm≤L_xLess than or equal to 6 mm. If the long axis of the surface where the bottom 21 is located is too long, the structure of the convex hull is too large, so that enough convex hull structures cannot be arranged, the turbulent flow effect can be influenced, and the heat exchange effect is further influenced. If the long axis of the face of bottom 21 place is too little, will make the structure undersize of convex closure, like this, the convex closure will not play effectual water conservancy diversion effect, therefore can influence the vortex effect, and then influence the heat transfer effect. And when the major axis through with the face at bottom 21 place set to above-mentioned range value for the major axis is in reasonable value range, also can set up the suitable interval between the adjacent vortex convex closure 20, and then can improve water conservancy diversion efficiency better, with better improvement heat transfer effect.

In the present embodiment, the minor axis of the plane in which the bottom 21 is located is L_y，1≤L_yLess than or equal to 3 mm. If the short axis of the surface where the bottom 21 is located is too long, the structure of the convex hull is too large, so that enough convex hull structures cannot be arranged; meanwhile, the curvature of the end part of the ellipse in the flowing direction of the fluid in the fluid channel is too small, the flowing speed of the fluid is influenced, the turbulent flow effect is influenced, and the heat exchange effect is further influenced. If the long axis of the surface of the bottom 21 is too small, the structure of the convex hull is too small; meanwhile, the curvature of the elliptic end part along the flowing direction of the fluid is overlarge, and the flow guide effect is not obvious; thus, the convex hull will not play an effective role in guiding flow, thereby influencing the turbulent flow effect and further influencing the heat exchange effect. And when the major axis through with the face at bottom 21 place set to above-mentioned range value for the major axis is in reasonable value range, also can set up the suitable interval between the adjacent vortex convex closure 20, and then can improve water conservancy diversion efficiency better, with better improvement heat transfer effect.

In the present embodiment, the major axis of the surface on which the bottom 21 is located is L_xThe minor axis of the plane of the bottom 21 is L_y，1＜L_x/L_yLess than or equal to 4. Specifically, through setting up reasonable ratio range, can make the curvature of the oval tip in the direction of flow along the fluid have suitable scope (specifically, the direction of flow of fluid is the direction of flowing to the second end by the first end of plate body 10, the oval third end and the fourth end that have relative setting along the direction of flow of fluid, the curvature at third end or fourth end is oval tip curvature promptly), can carry out the water conservancy diversion so better to guide the flow of fluid in the fluid passage better, and guarantee the velocity of flow of fluid, thereby be convenient for improve heat transfer effect.

In the present embodiment, the distance between the center points of two adjacent turbulator bosses 20 along the flowing direction of the fluid in the fluid channel is D_h，2mm≤D_hLess than or equal to 8 mm. When the distance between the central points of two adjacent turbulent convex hulls 20 is set to be too large, the buffer space of the fluid is large enough, and a good flow guiding effect cannot be achieved; when the distance between the central points of two adjacent turbulent convex hulls 20 is set to be too small, the turbulent effect can be fully played by the turbulent convex hulls 20, but the speed of the fluid can be reduced more, so that the heat exchange effect can be influenced. And set the distance between the central point of two adjacent vortex convex hulls 20 to the above-mentioned scope, can be convenient for better carry on the water conservancy diversion to guarantee the fluidic velocity of flow, and then improved the heat transfer effect.

In the present embodiment, the distance between the center points of two adjacent turbulator bosses 20 along the direction perpendicular to the flowing direction of the fluid in the fluid channel is D_L，2mm≤D_LLess than or equal to 8 mm. When the distance between the central points of two adjacent turbulent convex hulls 20 is set to be too large, the buffer space of the fluid is large enough, and a good flow guiding effect cannot be achieved; when the distance between the central points of two adjacent turbulent convex hulls 20 is set to be too small, the turbulent effect can be fully played by the turbulent convex hulls 20, but the speed of the fluid can be reduced more, so that the heat exchange effect can be influenced. And the distance between the central points of two adjacent turbulent convex hulls 20 is set to be within the range, so that better guidance can be facilitatedFlow and ensure the flow velocity of the fluid, thereby improving the heat exchange effect.

As shown in fig. 7 to 11, the second embodiment of the present invention provides a heat exchanger, which includes a heat exchanger flat tube 30, and the heat exchanger flat tube 30 is the heat exchanger flat tube 30 provided in the first embodiment. By adopting the structure, the heat exchange performance of the heat exchanger can be improved conveniently.

Specifically, the heat exchanger flat tubes 30 in this embodiment are multiple, the heat exchanger further includes an inlet header 41, an outlet header 42, a connecting tube 50 and a liquid separating structure 60, the connecting tube 50 is disposed on the inlet header 41, and the connecting tube 50 is used for being connected to other structures. One end of each of the heat exchanger flat tubes 30 is inserted into the inlet header 41 at intervals, so that fluid in the inlet header 41 flows into the heat exchanger flat tubes 30, the other end of each of the heat exchanger flat tubes 30 is inserted into the outlet header 42 at intervals, so that fluid in the heat exchanger flat tubes 30 flows out to the outlet header 42, and the heat exchanger flat tubes 30, the inlet header 41 and the outlet header 42 form an array with the same direction to form a heat exchanger. Divide liquid structure 60 to set up in the import pressure manifold 41, divide and be provided with a plurality of minute liquid mouths 61 on the liquid structure 60, a plurality of minute liquid mouths 61 set up with a plurality of heat exchanger flat tube 30 one-to-one, and each divides liquid mouth 61 and corresponding heat exchanger flat tube 30's fluid passage intercommunication to make the fluid after dividing liquid structure 60 flow into to corresponding heat exchanger flat tube 30 in through dividing liquid mouth 61. By adopting the arrangement, the liquid-state refrigerant can be uniformly introduced into each heat exchanger flat tube 30 through the liquid separating structure 60, so that the heat exchange performance of the heat exchanger is stabilized, and the heat exchange effect is better improved.

Specifically, the liquid separating structure 60 in this embodiment is a liquid separating plate, the liquid separating plate is disposed in the inlet collecting pipe 41, the liquid separating plate is connected with the inner wall of the inlet collecting pipe 41 to form a liquid separating cavity 62, and the liquid separating ports 61 are disposed on the liquid separating plate at intervals, so that the liquid in the liquid separating cavity 62 flows into the corresponding heat exchanger flat tubes 30 through the liquid separating ports 61. By adopting the arrangement, the liquid separation effect can be better improved, so that uniform liquid separation can be carried out, the heat exchange performance of the heat exchanger is better stabilized, and the heat exchange effect is further improved. The liquid separation plate in this embodiment is generally formed by, but not limited to, molding.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: through setting up the protruding closure structure of vortex to the profile that makes the top and the profile of bottom are oval, can increase flow area like this, are convenient for carry out the water conservancy diversion to the refrigerant, suitably improve the velocity of flow of refrigerant, in order to improve heat transfer effect.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The flat tube of the heat exchanger is characterized by comprising two plate bodies (10) which are oppositely arranged, a fluid channel is formed between the two plate bodies (10), a turbulent flow convex hull (20) is arranged in the fluid channel, and the turbulent flow convex hull (20) is arranged on at least one of the plate bodies (10); along the perpendicular to the direction of plate body (10), vortex convex hull (20) have relative bottom (21) and top (22) that set up, bottom (21) with plate body (10) are connected, the profile of top (22) with the profile of bottom (21) is the ellipse.

2. The heat exchanger flat tube according to claim 1, characterized in that a line connecting the center point of the top part (22) and the center point of the surface of the bottom part (21) forms a center line, which is perpendicular to the plate body (10).

3. The heat exchanger flat tube according to claim 1, characterized in that the turbulator boss (20) further comprises a side wall surface (23), and the cross-sectional area of the side wall surface (23) is gradually reduced along the direction from the bottom (21) to the top (22).

4. A heat exchanger flat tube according to claim 3, characterised in that the side wall surface (23) is an elliptical cone surface.

5. The heat exchanger flat tube according to claim 4, characterized in that the cone angle of the elliptical cone is α, 0 < α ≦ 90 °.

6. Heat exchanger flat tube according to claim 1, characterized in that the distance between the faces of the top (22) and the bottom (21) is H_L，0＜H_L≤2mm。

7. Heat exchanger flat tube according to claim 1, characterized in that the major axis of the face of the base (21) is L_x，2mm≤L_x≤6mm。

8. Heat exchanger flat tube according to claim 1, characterized in that the minor axis of the plane in which the bottom (21) lies is L_y，1≤L_y≤3mm。

9. Heat exchanger flat tube according to claim 1, characterized in that the major axis of the face of the base (21) is L_xThe minor axis of the plane of the bottom (21) is L_y，1＜L_x/L_y≤4。

10. The heat exchanger flat tube according to claim 1, characterized in that, along the flow direction of the fluid in the fluid channel, the distance between the central points of two adjacent turbulent convex hulls (20) is D_h，2mm≤D_h≤8mm。

11. The heat exchanger flat tube according to claim 1, characterized in that, in a direction perpendicular to a flow direction of the fluid in the fluid channel, a distance between center points of two adjacent turbulator convex hulls (20) is D_L，2mm≤D_L≤8mm。

12. A heat exchanger, characterized by comprising a heat exchanger flat tube (30), the heat exchanger flat tube (30) being a heat exchanger flat tube (30) according to any one of claims 1 to 11.

13. The heat exchanger according to claim 12, characterized in that the heat exchanger flat tubes (30) are plural, the heat exchanger further comprising:

the heat exchanger flat tubes (30) are inserted into the inlet collecting pipe (41) at intervals, so that fluid in the inlet collecting pipe (41) flows into the heat exchanger flat tubes (30);

divide liquid structure (60), divide liquid structure to set up in import pressure manifold (41), it is provided with a plurality of minute liquid mouths (61) on liquid structure (60), and is a plurality of divide liquid mouth (61) and a plurality of heat exchanger flat pipe (30) one-to-one sets up, each divide liquid mouth (61) and corresponding the fluid passage intercommunication of heat exchanger flat pipe (30) sets up, so that the warp divide liquid structure (60) to divide the fluid warp after liquid the fluid warp divide liquid mouth (61) to flow into to corresponding in the heat exchanger flat pipe (30).