CN112432522B

CN112432522B - Heat exchanger

Info

Publication number: CN112432522B
Application number: CN202010247541.XA
Authority: CN
Inventors: 张坤鹏; 马峥; 董军启; 王唯全
Original assignee: Hangzhou Sanhua Research Institute Co Ltd
Current assignee: Hangzhou Sanhua Research Institute Co Ltd
Priority date: 2020-03-31
Filing date: 2020-03-31
Publication date: 2022-09-06
Anticipated expiration: 2040-03-31
Also published as: CN112432522A

Abstract

The application relates to a heat exchanger, this heat exchanger includes: the heat exchange tube is at least partially positioned in the shell; the heat exchange tube is connected with the flow collecting piece, and the inner cavity of the flow collecting piece is communicated with the inner cavity of the heat exchange tube; the cover is matched with the current collecting piece and comprises a side wall, and the side wall extends along the outer wall of the shell and is connected with the outer wall of the shell in a sealing mode. This application can reduce the size of heat exchanger on heat exchange tube length direction.

Description

Heat exchanger

Technical Field

The application relates to the technical field of heat exchange, in particular to a heat exchanger.

Background

Heat exchangers are widely used in thermal management systems, such as automotive air conditioning systems. The heat exchanger of the related art may be used to exchange heat between a refrigerant and a coolant.

The related heat exchanger has a housing, and the heat exchange pipe is installed inside the housing to exchange heat with the coolant inside the housing. However, the flow collecting piece of the heat exchanger is communicated with the outside in the length direction of the heat exchange tube, so that the inner cavity of the flow collecting piece is communicated with the outside in the length direction of the heat exchange tube, and the size of the flow collecting piece in the length direction of the heat exchange tube is increased.

Disclosure of Invention

In view of the above problems, the present application provides a heat exchanger that reduces the size of a collector in the length direction of a heat exchange tube.

The application provides a heat exchanger, includes:

the heat exchange tube is at least partially positioned in the shell;

the heat exchange tube is fixedly connected with the shell, the flow collecting piece is provided with a mounting groove which penetrates through the second wall part along the first direction, at least part of the heat exchange tube is accommodated in the mounting groove, the inner cavity of the flow collecting piece is communicated with the inner cavity of the heat exchange tube, and the tube wall of the heat exchange tube is hermetically connected with the wall of the mounting groove;

the cover comprises a side wall arranged in a surrounding mode, and the side wall is connected with the connection position of the shell and the current collecting piece in a sealing mode.

The application provides a heat exchanger, this heat exchanger's heat exchange tube and inner chamber along first direction intercommunication, the inner chamber of mass flow piece along first direction not with external intercommunication, the mass flow piece along second direction and external intercommunication, the second direction perpendicular to first direction makes the length of mass flow piece on first direction reduce.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

Fig. 1 is a perspective view of a heat exchanger provided in an embodiment of the present application;

FIG. 2 is a front view of a heat exchanger provided by an embodiment of the present application;

FIG. 3 is a cross-sectional view taken along A-A of FIG. 2;

FIG. 4 is a top view of a heat exchanger provided by an embodiment of the present application;

FIG. 5 is a cross-sectional view taken along line B-B of FIG. 4;

FIG. 6 is a schematic view of a first form of closure provided by an embodiment of the present application;

FIG. 7 is a schematic view of a second form of closure provided by an embodiment of the present application;

fig. 8 is a first perspective view of a first collector plate according to an embodiment of the present disclosure;

fig. 9 is a second perspective view of a first collector plate provided in an embodiment of the present application;

fig. 10 is a schematic view of a second current collecting plate according to an embodiment of the present application;

fig. 11 is a schematic view of a third current collecting plate according to an embodiment of the present application;

fig. 12 is a schematic view illustrating an assembly of a cover and a current collector according to an embodiment of the present disclosure;

FIG. 13 is a cross-sectional view taken along line C-C of FIG. 12;

FIG. 14 is a perspective cross-sectional view of a heat exchanger provided in an embodiment of the present application;

fig. 15 is a partial enlarged view of fig. 5 at D.

Reference numerals:

1-a shell;

1 a-a second face;

11-an upper shell;

12-a lower housing;

13-a coolant inlet;

14-coolant outlet;

15-a refrigerant inlet;

16-a refrigerant outlet;

2-a heat exchange core;

21-heat exchange tube;

21 a-end;

22-a fin;

3-a current collector;

3 a-a first wall portion;

3 b-a second wall portion;

3 c-lumen;

3 d-first side;

3 e-the outer surface;

31-a first collector plate;

311-a bump structure;

312-a communication hole;

313-a flow channel;

314-a plate body;

32-a second collector plate;

321-a first channel;

33-a third collector plate;

331-a second channel;

332-flanging;

34-a step portion;

4-sealing the cover;

41-side wall;

411 — first connection face;

42-a bottom wall;

42 a-a window;

421-a second connection face;

43-grooves;

44-a flanging structure;

45-avoiding groove;

46-avoiding holes;

5-lining board;

6-connecting groove.

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

In the description of the present application, unless explicitly stated or limited otherwise, the terms "first", "second", and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless specified or indicated otherwise; the terms "connected," "fixed," and the like are to be construed broadly and may, for example, be fixedly connected, detachably connected, integrally connected, or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In the description of the present application, it should be understood that the terms "upper" and "lower" used in the description of the embodiments of the present application are used in a descriptive sense only and not for purposes of limitation. In addition, in this context, it will also be understood that when an element is referred to as being "on" or "under" another element, it can be directly on "or" under "the other element or be indirectly on" or "under" the other element via an intermediate element.

Heat exchangers are widely used in thermal management systems. The heat exchanger can be used for exchanging heat between the refrigerant and the cooling liquid. In the related technology, the collecting pipe is machined to form a flat pipe groove by adopting an extruded section, and because the collecting pipe is a section part without a composite layer on the surface, the main board and the collecting pipe are riveted to achieve the welding between the collecting pipe and the flat pipe. The water shell adopts a direct insertion type, in the installation process, the wall of the water shell is clamped in the groove around the collecting pipe, and the water shell is in butt joint and then is sealed and welded.

The inventors found that the following problems exist in the related art: the heat exchanger increases the size of the current collector in the length direction of the heat exchange tube.

The technical scheme of this application embodiment provides a heat exchanger, can reduce the size of heat exchanger in heat exchange tube length direction. See below for a description of specific embodiments.

As shown in fig. 1, 5, 14 and 15, the present application provides a heat exchanger including a shell 1, a heat exchange core 2, a current collector 3 and a cover 4. Wherein, heat exchange core 2 includes a plurality of heat exchange tubes 21, heat exchange tubes 21 can be microchannel flat pipe. A plurality of heat exchange tubes 21 are arranged at intervals along the second direction, and the heat exchange tubes 21 are integrally positioned in the shell 1. In other embodiments, the heat exchange tube 21 may have both ends thereof located outside the shell 1, i.e., the end 21a of the heat exchange tube 21 is inserted deep into the collector 3. Heat exchange fins 22 may be further disposed between the heat exchange tubes 21.

The flow collecting piece 3 comprises a first wall part 3a and a second wall part 3b, the flow collecting piece 3 is provided with an inner cavity 3c, the first wall part 3a and the second wall part 3b are positioned on two opposite sides of the inner cavity 3c in a first direction, the heat exchange tube 21 is fixedly connected to the second wall part 3b, the heat exchange tube 21 is communicated with the inner cavity 3c in the first direction, the inner cavity 3c is not communicated with the outside in the first direction, the flow collecting piece 3 is communicated with the outside in a second direction, the second direction is perpendicular to the first direction, the flow collecting piece 3 is connected with the shell 1, the flow collecting piece 3 is provided with a mounting groove which penetrates through the second wall part 3b in the first direction, part of the heat exchange tube 21 is accommodated in the mounting groove, the end part 21a of the heat exchange tube 21 is positioned in the inner cavity 3c of the flow collecting piece 3, and the inner cavity 3c of the flow collecting piece 3 is communicated with the inner cavity of the heat exchange tube 21, the pipe wall of the heat exchange pipe 21 is hermetically connected with the groove wall of the mounting groove. As shown in fig. 1, the first direction is a heat exchanger length direction L, the second direction is a heat exchanger width direction W, and the third direction is a heat exchanger height direction H.

The inner cavity 3c is not communicated with the outside along the first direction, and the collecting piece 3 is communicated with the outside along the second direction, so that the size of the collecting piece 3 in the first direction can be reduced, and the size of the heat exchanger in the first direction is reduced, namely the length of the heat exchanger is reduced.

As shown in fig. 6, the cover 4 is a concave structure matching with the shape structure of the current collector 3, so that the cover 4 can be fastened on the current collector 3. The cap 4 includes a bottom wall 42 provided in close contact with the first wall portion 3a, a side wall 41 extending from the bottom wall 42 in a direction (L direction) toward the heat exchange tube 21, and a groove 43 surrounded by the side wall 41 and the bottom wall 42. The current collector 3 is at least partially located in the groove 43, the bottom wall 42 at least partially covers the first wall 3a of the current collector 3, and the side wall 41 covers the interface between the current collector 3 and the housing 1. The side wall 41 extends along the outer wall of the housing 1 and is sealingly connected to the outer wall of the housing 1. And the collecting piece 3 and the shell 1 are fixed with the cover 4 by brazing, so that the connection strength of the heat exchanger is increased. The junction of the current collector 3 and the case 1 is sealed, specifically, as shown in fig. 5 and 15, the current collector 3 is provided with a first face 3d facing the case 1 in the first direction, the case 1 is provided with a second face 1a facing the current collector 3 in the first direction, the first face 3d and the second face 1a are hermetically connected to each other in a face-to-face manner, and the side wall 41 of the cover 4 surrounds the outside where the first face 3d and the second face 1a are joined. The heat exchanger of the embodiment has the advantages that the connection part of the current collecting piece 3 and the shell 1 is sealed, the connection part of the current collecting piece 3 and the shell 1 is connected in a sealing mode through the sealing cover 4, and the leakage probability of cooling liquid is effectively reduced.

As shown in fig. 6, the side wall 41 has a first connecting surface 411 located in the groove 43, the first connecting surface 411 is attached to the outer walls of the housing 1 and the current collecting member 3, and the second connecting surface 421 is attached to the outer side surface of the current collecting member 3 away from the housing 1, so that the cover 4 is fastened or attached to the current collecting member 3.

Specifically, as shown in fig. 1, the shell 1 is a rectangular parallelepiped structure with two open ends, the two ends of the shell 1 are both connected with the current collectors 3, the current collectors 3 are plugged at the open ends, the heat exchange core 2 includes a plurality of sets of heat exchange tubes 21 arranged at intervals, and the heat exchange tubes 21 extend along a length direction L of the shell 1, that is, a first direction in fig. 1. The heat exchange tubes 21 have both ends extending into the collecting member 3, and the collecting member 3 has an inner chamber 3c for outputting or inputting the refrigerant, and the inner chamber 3c is communicated with the inner chambers of the respective groups of heat exchange tubes 21, whereby the refrigerant of one collecting member can flow into the other collecting member through the heat exchange tubes 21.

In order to further improve the heat exchange efficiency of the heat exchanger, in this embodiment, as shown in fig. 14, a heat exchange fin 22 may be disposed between two adjacent heat exchange tubes 21, and the heat exchange efficiency between the refrigerant inside the heat exchange tube 21 and the cooling liquid outside the heat exchange tube 21 can be enhanced by the heat exchange fin 22, so as to improve the heat exchange efficiency of the whole heat exchanger.

The collecting piece 3 and the heat exchange core body 2 are connected in a sealing way, so that the leakage at the connection part can not occur in the process of conveying the refrigerant; and, because the collecting piece 3 is connected with the shell 1 in a sealing way, the probability of leakage of the refrigerant and the cooling liquid is effectively reduced.

In order to further reduce the risk of refrigerant leakage, in this embodiment, the covers 4 are respectively covered at two opposite ends of the heat exchanger, specifically, as shown in fig. 1, 3, 6 and 7, the covers 4 are rectangular concave shell structures matched with the shell 1, the concave shell structures comprise side walls 41 and bottom walls 42, the side walls 41 are enclosed around the bottom walls 42, so that a groove 43 is defined, and the collecting piece 3 and the end part of the shell 1 can be completely or partially positioned in the groove 43. The side wall 41 has a first connecting surface 411 located in the groove 43, the bottom wall 42 has a second connecting surface 421 located in the groove 43, when the cover 4 is fastened on the end of the heat exchanger, the first connecting surface 411 is attached to the side wall of the adjacent end of the shell 1 and part of the side wall of the current collecting piece 3, and sealing is performed at the connecting position, which may be realized by sealing the connecting gap after the brazing filler metal layer provided on the side wall 41 is melted in the brazing process, so that the connecting gap is sealed at the connecting position and the two walls are fixedly connected. The second connecting surface 421 is attached to the outer side surface 3e of the current collector 3, and when the cover 4 is fastened to the current collector 3, the second connecting surface 421 is attached to the outer side surface 3e of the current collector 3, and accordingly, a solder layer (not shown) on the bottom wall 42 is melted during the brazing process to seal the connecting gap and fixedly connect the two walls. In some embodiments, the side walls 41 and the bottom wall 42 may also be provided without a brazing material layer, and the outer connection gap is sealed by clamping and then brazing the cover 4 and the collector 3, so as to reduce leakage.

Therefore, by the provision of the cap 4, a coating layer is formed at the connection region of the case 1 and the current collector 3, and the coating layer can perform a secondary sealing function, thereby reducing the possibility of leakage of the coolant.

In the present embodiment, a first heavy leakage-proof layer is formed by sealing connection between the shell 1 and the current collecting member 3, and a second heavy leakage-proof layer is formed by sealing connection between the side wall 41 of the cover 4 and the outer wall of the shell 1, therefore, the heat exchanger provided in this embodiment includes the side wall 41 disposed circumferentially, the current collecting member 3 is provided with the first face 3d facing the shell 1 along the first direction, the shell 1 is provided with the second face 1a facing the current collecting member 3 along the first direction, the first face 3d and the second face 1a are connected in a face-to-face sealing manner, and the side wall 41 of the cover 4 surrounds the outside of the joint of the first face 3d and the second face 1a, so as to reduce the probability of leakage of the cooling liquid from the inside of the shell 1.

Moreover, the sealing cover 4 is connected and buckled on the outer side of the flow collecting piece 3, and the connection with the shell 1 ensures that the sealing cover 4 can apply certain pressure on the flow collecting piece 3, so that the overall compression strength, rigidity and stability of the flow collecting piece 3 are improved, and the flow collecting piece 3 is not easy to deform under the pressure action of a refrigerant; meanwhile, the shell 1 and the flow collecting piece 3 are more stably connected and are not easy to fall off, the overall strength, rigidity and stability of the heat exchanger are further guaranteed, and the sealing performance is guaranteed.

It should be noted that, in this embodiment, both ends of the shell 1 are connected with the collecting member 3, of course, in other embodiments, the collecting member 3 may also be only arranged at one end of the shell 1, and the refrigerant can also enter and exit through one collecting member 3 and the plurality of heat exchange tubes 21, and this application does not specifically limit the number of the collecting members 3, as long as the requirement is met; likewise, the number of groups of covers 4 corresponds to the number of groups of collectors 3, and is likewise not limited.

A step part 34 is further arranged at the periphery of the current collecting piece 3, a connecting groove 6 is formed between the step part 34 and the side wall 41, the wall of the shell 1 is embedded in the connecting groove 6, and the inner wall of the shell 1 is hermetically connected with the periphery wall of the step part 34.

Specifically, as shown in fig. 12 and 13, when the current collecting member 3 is mounted at the end of the casing 1, the stepped portion 34 is provided so that the end of the casing 1 can abut against the stepped portion 34, and further, when the cover 4 is fastened to the end of the heat exchanger, the side wall 41 of the cover 4 covers the outer wall of the casing 1 adjacent to the end thereof. Because the closing cap 4 is buckled on the current collecting piece 3, a connecting groove 6 is formed between the side wall 41 and the step part 34, when the shell 1 is connected with the current collecting piece 3, the end part of the shell 1 is actually embedded into the connecting groove 6, the inner wall of the shell 1 and the step part 34 are hermetically arranged, and the outer wall of the shell 1 and the side wall 41 are hermetically arranged, so that the sealing performance of the connecting part of the end part of the shell 1 is greatly improved, and the probability of leakage of cooling liquid from the shell 1 is reduced.

In order to facilitate the installation of the cover 4, in the present embodiment, a flange structure 44 is provided at the opening of the cover 4, and the flange structure 44 may be an outwardly-expanding chamfered edge, and referring to fig. 6 and 7 in particular, the flange structure 44 includes but is not limited to the following manners: an arc outward-expanding structure, a flat outward-expanding structure, a chamfer outward-expanding structure and the like. In the present embodiment, a circular arc flaring structure, i.e., a notch position of the groove 43, is provided on an end portion of the side wall 41 away from the bottom wall 42. Thus, when the cover 4 is mounted, the end of the housing 1 can be inserted into the groove 43 of the cover 4, and the cover 4 can be fastened conveniently.

The inner cavity 3c of the collector 3 in this embodiment includes a flow channel 313 extending in the second direction and a first channel 321, the first channel 321 being part of the mounting groove. Referring specifically to fig. 3, the end 21a of the heat exchange tube 21 is inserted into the first channel 321, and the header 3 forms two ports communicating with the first channel 321 in the length direction L, one of the ports adjacent to the shell 1 being for inserting the heat exchange tube 21 with the end 21a of the heat exchange tube 21 being located in the first channel 321 and the other port communicating with the flow channel 313, whereby the communication between the inner cavity of the heat exchange tube 21 and the flow channel 313 through the first channel 321 enables the refrigerant to flow between the header 3 and the heat exchange tube 21.

As shown in fig. 3 and 5, and fig. 8 to 10, the current collector 3 includes a first current collecting plate 31 and a second current collecting plate 32 connected with each other, wherein the second current collecting plate 32 may be a rectangular plate adapted to the end of the housing 1, and each side of the second current collecting plate 32 is hermetically connected with each inner wall of the end of the housing 1, respectively, the first current collecting plate 31 is tightly connected to the side of the second current collecting plate 32 facing the housing 1, and the end of the first current collecting plate 31 facing the housing 1 is connected with the end of the housing 1, thereby achieving the fixed mounting between the current collector 3 and the housing 1 through the connection between the first current collecting plate 31, the second current collecting plate 32 and the end of the housing 1.

As shown in fig. 3 and 10, in order to communicate the heat exchange tube 21 with the flow channel 313, a plurality of groups of first channels 321 are arranged at intervals on the second collecting plate 32, correspondingly, the flow channel 313 is arranged on the first collecting plate 31, a plurality of communicating holes 312 are formed on the side wall 41 of the flow channel 313, and the communication between the flow channel 313 and the first channels 321 is realized through the communicating holes 312; and since the end portion 21a of the heat exchange tube 21 is inserted and received in the first channel 321, the heat exchange tube 21, the first channel 321, the communication hole 312 and the flow channel 313 are communicated with each other to facilitate the transport of the refrigerant.

Here, when the cross-sectional area of the second collecting plate 32 is smaller than the cross-sectional area of the first collecting plate 31, and the second collecting plate 32 is fixedly connected to the side surface of the first collecting plate 31 facing the case 1, a step 34 is defined between the peripheral edge of the second collecting plate 32 and the first collecting plate 31, thereby achieving the mounting of the end portion of the case 1 and the collector 3.

Specifically, when the cover 4 is fastened to the current collecting member 3, due to the existence of the step portion 34, a certain space is provided between the side wall 41 of the cover 4 and the periphery of the second current collecting plate 32, and one side of the space is blocked by the first current collecting plate 31, so that the side wall 41, the first current collecting plate 31 and the second current collecting plate 32 together enclose the connecting groove 6, specifically referring to fig. 3, the end portion of the case 1 is inserted into the connecting groove 6, and the outer side wall of the case 1 and the first connecting surface 411 are hermetically welded, and the inner side wall of the case 1 and the second current collecting plate 32 are hermetically welded, thereby achieving the hermetic connection between at least two of the cover 4, the current collecting member 3 and the end portion of the case 1. Therefore, the cover 4 covers the current collecting piece 3 and the end part of the shell 1, so that an insertion welding mode is formed between the shell 1 and the cover 4 and between the shell 1 and the current collecting piece 3, the welding area is increased, the connection strength between the shell 1 and the cover 4 and between the shell 1 and the current collecting piece 3 is enhanced, the overall strength of the shell 1 and the current collecting piece 3 is further improved, and meanwhile, the strength of the whole heat exchanger is also improved.

In order to make the installation between the heat exchange tube 21 and the current collector 3 more stable and firm, a third current collecting plate 33 is added in the embodiment. As shown in fig. 3, 5, and 11, the third current collecting plate 33 is connected to the end surface of the second current collecting plate 32 away from the first current collecting plate 31, and the third current collecting plate 33 is provided with a second channel 331 corresponding to a plurality of groups of heat exchanging pipes 21, the end 21a of each group of heat exchanging pipes 21 passes through the corresponding second channel 331, and the outer wall of the heat exchanging pipe 21 is connected with the channel wall of the second channel 331 in a sealing manner, so that the heat exchanging pipe 21 is communicated with the first channel 321, and the hole wall of the second channel 331 has a limiting and sealing effect on the heat exchanging pipe 21, thereby enhancing the stability and the sealing performance of installation between the heat exchanging pipe 21 and the current collecting part 3.

In other embodiments, the inner wall of the casing 1 is welded to the outer peripheral surface of the third current collecting plate 33 in addition to the second current collecting plate 32, so that the welding area is further increased, and the connection strength between the casing 1 and the current collecting piece 3 is enhanced.

With continued reference to fig. 11, in order to further improve the sealing performance, a flange 332 protruding toward one end surface of the third collecting plate 33 is disposed at the hole wall of each second channel 331, when the heat exchange tube 21 is inserted into the first channel 321, a gap exists between the outer wall of the heat exchange tube 21 and the side wall of the first channel 321, and the flange 332 at each second channel 331 can be inserted into the corresponding gap to fill the gap. And, the third current collecting plate 33 is preferably a soldering lug, so that the welding is carried out at the flange 332 between the heat exchange tube 21 and the third current collecting plate 33, the welding tightness of the joint is greatly improved, and the problem of leakage at the joint is effectively reduced.

It should be noted that the first collecting plate 31, the second collecting plate 32, and the third collecting plate 33 are combined together to form the collecting member 3 by riveting, or the like, which is convenient for operation and easy for manufacturing.

Alternatively, the flow channel 313 is provided on the first collecting plate 31, and the inner diameter of the flow channel 313 is relatively large in order to secure the flow rate of the refrigerant, thereby causing a large thickness dimension of the first collecting plate 31 if the flow channel 313 is completely provided in the first collecting plate 31, resulting in waste of materials and an increase in cost. Based on the above situation, in the present embodiment, the protrusion structure 311 is disposed on the outer side end surface of the first collecting plate 31 along the front-rear direction of the heat exchanger, specifically, the first collecting plate 31 includes a plate main body 314, the protrusion structure 311 protrudes from the first side surface of the plate main body 314, the communication hole 312 is opened on the second side surface of the plate main body 314, and the communication between the flow channel 313 and the first channel 321 is realized through the communication hole 312. Further, the flow channel 313 is formed along the length direction of the protrusion structure 311, and penetrates at least one end of the protrusion structure 311, which may be one end or two ends, and in this embodiment, one end may penetrate according to actual situations, specifically referring to fig. 1-4, 8, and 9, so that the flow of the refrigerant can be achieved through the flow channel 313.

Optionally, in order to enable the cover 4 to cover the current collector 3, a position avoiding structure is provided at a corresponding position of the cover 4 in the present embodiment, specifically referring to fig. 1, 6, and 7. Fig. 6 shows a first form of cover 4, the cover 4 being provided on at least one face with a bottom wall 42 and a window 42a, the window 42a having an area greater than that of the bottom wall 42 to ensure that the bottom wall 42 can be welded flush with the first collector plate 31 of the collector 3; moreover, since the window 42a region corresponds to the raised structure 311, the fastening of the cover 4 is not affected.

With continued reference to fig. 6, in consideration of the inflow or outflow of the refrigerant into or from at least one end of the flow channel 313, in the embodiment, a corresponding position-avoiding hole 46 is formed on the sidewall 41, and the position-avoiding hole 46 is disposed opposite to the port at one end or both ends of the flow channel 313 to ensure that the refrigerant can flow into or out of the flow channel 313.

Figure 7 shows a second form of closure 4, in which the bottom wall 42 is not windowed. Considering that the bottom wall 42 and the outer end face of the current collector 3 need to be in close contact, in the present embodiment, the bottom wall 42 is provided with the avoiding groove 45 protruding outward relative to the bottom wall 42, and when the cover 4 is fastened, the protrusion structure 311 is embedded in the avoiding groove 45, thereby facilitating the fitting welding of the bottom wall 42 of the cover 4 and the first current collecting plate 31 of the current collector 3.

With reference to fig. 7, in consideration of the fact that the refrigerant flows into or flows out of at least one end of the flow channel 313, in the present embodiment, a corresponding clearance hole 46 is formed in the sidewall 41, and the clearance hole 46 is disposed corresponding to a port at one end or two ends of the flow channel 313 to ensure that the refrigerant can flow into or out of the flow channel 313.

It should be noted that the window 42a, the avoiding hole 46, and the avoiding groove 45 are all in a specific form of avoiding structure, and certainly, the avoiding structure may be in other forms, which is not limited herein.

In addition, the seal cover 4 in the embodiment adopts a plate forming process and is formed by stamping through a die; and the forming structure of the inner surface of the bottom wall 42 is consistent with the structure of the outer side end face of the current collector 3, so that the two parts can be tightly attached and welded, and the integral strength of the current collector 3 is increased. Optionally, at least one flow channel 313 is disposed inside the first current collecting plate 31, and accordingly, the extension directions of the protrusion structures 311 and the flow channels 313 are the same, and the avoiding structures on the sealing cover 4 are matched with the protrusion structures 311. In the present application, only one flow channel 313 may be provided on the first collecting plate 31 to achieve the mutual flow of the refrigerant between the collecting member 3 and the heat exchange tube 21. The diameter of the flow channel 313 may be different or the same throughout. For example, the diameter is gradually decreased or increased from the opening along the extending direction of the flow passage 313.

Referring to fig. 1 to 5, in order to facilitate assembly of the entire heat exchanger, in this embodiment, the casing 1 is divided into two parts, namely an upper casing 11 and a lower casing 12, and the upper casing 11 and the lower casing 12 are both U-shaped, when being installed, the upper casing 11 is fastened to the top surface and the side upper part of the heat exchange core 2, namely, the upper casing 11 is wrapped on the top surface and the side upper part of the heat exchange core 2, the lower casing 12 is fastened to the lower part of the heat exchange core 2, namely, the lower casing 12 is wrapped on the bottom surface and the side lower part of the heat exchange core 2, and two sides of the upper casing 11 are butted with two sides of the lower casing 12 at the front and rear sides of the heat exchange core 2. In order to further enhance the connection strength between the upper casing 11 and the lower casing 12 and reduce the leakage at the connection position, the casing 1 in the embodiment further includes a lining plate 5 disposed on the inner side surface of the connection position between the upper casing 11 and the lower casing 12, the lining plate 5 is in a long strip plate shape and is disposed along the left-right direction of the casing 1, and the length of the lining plate 5 is adapted to the length of the casing 1, so that the strength of the connection position is enhanced, and the sealing performance of the connection position is improved.

It should be noted that, due to the arrangement of the lining plate 5, the end portions of the casing 1 and the lining plate 5 are inserted into the connecting groove 6 together, so that the end portion of the lining plate 5 is directly attached to the outer peripheral surface of the second current collecting plate 32 for sealing and welding, and further, a welding surface is formed between adjacent two of the end portion of the casing 1, the end portion of the lining plate 5 and the second current collecting plate 32, so as to further improve the sealing performance between the casing 1 and the current collecting member 3.

Further, considering that the connection condition between the end of the shell 1 and the end of the lining plate 5 and the current collecting piece 3 has a certain influence on the fluidity of the brazing filler metal, in this embodiment, after the end of the shell 1 and the end of the lining plate 5 are inserted into the connecting groove 6, the end face of the shell 1 and the end face of the lining plate 5 are both butted with the surface of the first current collecting plate 31, so as to facilitate the positioning and fixing of the current collecting piece 3 and even the whole heat exchange core body 2, and meanwhile, the brazing filler metal has a certain benefit on the fluidity.

In other embodiments, a certain gap, i.e., a capillary gap, is left between the end surfaces of the case 1 and the backing plate 5 and the first current collecting plate 31 to facilitate solder flow.

Optionally, a composite layer is disposed between the cap 4 and the first current collecting plate 31. Specifically, the bottom wall 42 has a composite layer, which is preferably a solder layer, and the composite layer is not disposed on the outer end surface of the first current collecting plate 31, so that when welding, the composite layer is disposed, which is beneficial to welding, and the welding firmness is improved, thereby further improving the overall strength of the current collecting member 3. Preferably, the composite layer is made of brazing materials, and the welding mode is brazing.

The assembly process of the heat exchanger provided in this embodiment is specifically as follows:

firstly, assembling a current collecting piece 3, specifically, assembling a first current collecting plate 31, a second current collecting plate 32 and a third current collecting plate 33 through riveting, riveting and the like to form the current collecting piece 3;

secondly, assembling the heat exchange core body 2 and the current collecting piece 3, specifically, arranging fins 22 between two adjacent heat exchange tubes 21, arranging a plurality of groups of heat exchange tubes 21 and a plurality of groups of fins 22 side by side, and respectively installing the current collecting piece 3 at two ends of each heat exchange tube 21;

then, installing the shell 1, specifically, covering the heat exchange core 2 with an upper shell 11 and a lower shell 12, and arranging lining plates 5 at the front side joint and the rear side joint of the upper shell 11 and the lower shell 12 in advance respectively;

and finally, installing the sealing covers 4, specifically, respectively buckling the sealing covers 4 at two ends of the shell 1, and pressing the two ends until the bottom wall 42 of the sealing cover 4 is completely attached to the first current collecting plate 31 of the current collecting piece 3, thereby completing the installation of the heat exchanger.

It should be noted that, in the above installation process, the heat exchange tube 21 and the current collecting piece 3 need to be sealed and welded, the inner wall of the casing 1 and the current collecting piece 3 need to be sealed and welded, the lining plate 5 and the inner walls of the front and rear sides of the casing 1 need to be welded, the end of the lining plate 5 and the current collecting piece 3 need to be welded, the bottom wall 42 of the cover 4 and the current collecting piece 3 need to be welded, and the side wall 41 of the cover 4 and the outer side wall 41 of the casing 1 need to be sealed and welded. Through each welding process, the sealing connection between the parts is realized, and the probability of leakage of the cooling liquid from the shell 1 is further effectively reduced.

The two specific flow processes of the heat exchanger provided by the embodiment have the following working principles:

the cooling liquid enters the shell 1 from the cooling liquid inlet 13 and flows out from the cooling liquid outlet 14; the refrigerant enters the flow channel 313 of one collecting piece 3 of the heat exchanger from the refrigerant inlet 15 of the connecting pressing block, flows through a plurality of groups of heat exchange tubes 21, and exchanges heat with the cooling liquid through the heat exchange tubes 21 and the heat exchange fins 22, and the refrigerant after heat exchange flows through the flow channel 313 of the other collecting piece 3 to flow out through the refrigerant outlet 16 of the other connecting pressing block. The cooling liquid of the present embodiment may be a mixed solution of ethanol and water, the refrigerant may be R134a or carbon dioxide, and the heat exchanger of the present application may be a condenser and may be used as an evaporator. In other embodiments, the connecting compacts may also be provided on the raised structures 311.

On the basis of the embodiment, the flow collecting piece 3 can be improved, and the partition plate is arranged in the flow collecting piece 3 to divide the flow channel 313 of the flow collecting piece 3 into two parts, so that the flow path of the heat exchanger is increased, and the distribution uniformity of the refrigerant and the heat exchange efficiency of the heat exchanger are improved.

To sum up, the heat exchanger that this application provided has better leakproofness, has reduced the probability that the coolant liquid was revealed, has promoted the holistic structural strength of heat exchanger simultaneously.

The foregoing is illustrative of only alternative embodiments of the present application and is not intended to limit the present application, which may be modified or varied by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A heat exchanger, comprising:

a shell (1) and a heat exchange tube (21), the heat exchange tube (21) extending in a first direction, the heat exchange tube (21) being at least partially located within the shell (1);

the flow collecting piece (3) comprises a first wall portion (3a) and a second wall portion (3b), the flow collecting piece (3) is provided with an inner cavity (3c), the first wall portion (3a) and the second wall portion (3b) are located on two opposite sides of the inner cavity (3c) in the first direction, the heat exchange tube (21) is fixedly connected to the second wall portion (3b), the heat exchange tube (21) is communicated with the inner cavity (3c) in the first direction, the inner cavity (3c) is not communicated with the outside in the first direction, the flow collecting piece (3) is communicated with the outside in the second direction, the second direction is perpendicular to the first direction, the flow collecting piece (3) is connected with the shell (1) in a sealing mode, the flow collecting piece (3) is provided with a mounting groove penetrating through the second wall portion (3b) in the first direction, and the heat exchange tube (21) is at least partially accommodated in the mounting groove, an inner cavity (3c) of the flow collecting piece (3) is communicated with an inner cavity of the heat exchange tube (21), and the tube wall of the heat exchange tube (21) is hermetically connected with the wall of the mounting groove;

the cover (4) is buckled on the flow collecting piece (3), the cover (4) comprises a side wall (41) arranged in a surrounding mode, the side wall (41) is connected with the connection position of the shell (1) and the flow collecting piece (3) in a sealing mode, and the side wall (41) extends along the outer wall of the shell (1) and is connected with the outer wall of the shell (1) in a sealing mode.

2. A heat exchanger according to claim 1, characterised in that the collector piece (3) is provided with a first face (3d) facing in a first direction towards the housing (1), that the housing (1) is provided with a second face (1a) facing in a first direction towards the collector piece (3), that the first face (3d) and the second face (1a) are sealingly connected in a face-to-face manner, and that the side wall (41) of the cover (4) surrounds the outside of the junction of the first face (3d) and the second face (1 a).

3. The heat exchanger according to claim 2, characterised in that the peripheral edge of the side wall (41) in connection with the housing (1) forms a flange structure (44).

4. The heat exchanger of claim 1, wherein: the cover (4) further comprises a bottom wall (42), and a groove (43) formed by a side wall (41) and the bottom wall (42), the bottom wall (42) is connected to the first wall (3a) of the current collector (3), and the end of the housing (1) and at least part of the current collector (3) are located in the groove (43).

5. The heat exchanger of claim 2, wherein: one side, far away from the shell (1), of the current collecting piece (3) is provided with a protruding structure (311), a flow channel (313) extending along the second direction is arranged in the protruding structure (311), and the flow channel (313) is communicated with the inner cavity of the heat exchange tube (21).

6. The heat exchanger of claim 5, wherein: the shell (1) is provided with an opening, and the current collecting piece (3) is mounted at the opening of the shell (1);

the flow collecting piece (3) comprises a first flow collecting plate (31) and a second flow collecting plate (32), the first flow collecting plate (31) and the second flow collecting plate (32) are fixedly connected, the first flow collecting plate (31) is located outside the shell (1), the second flow collecting plate (32) is located inside the shell (1), the cross section area of the second flow collecting plate (32) is smaller than that of the first flow collecting plate (31), and the first flow collecting plate (31) and the second flow collecting plate (32) are matched to form a step portion (34);

the heat exchange tube is characterized in that the protruding structure (311) is arranged on the first current collecting plate (31), the second current collecting plate (32) is provided with a first channel (321), the first channel (321) is communicated with the flow channel (313), at least part of the heat exchange tube (21) is accommodated in the corresponding first channel (321), the outer tube wall of the heat exchange tube (21) is hermetically connected with the channel wall at the position of the first channel (321), and the first channel (321) belongs to one part of the installation groove.

7. The heat exchanger according to claim 6, wherein the first collecting plate (31) includes a plate main body (314), the projection structure (311) projects from a first side surface of the plate main body (314), a communication hole (312) is opened on a second side surface of the plate main body (314), the first and second side surfaces are located on opposite sides of the plate main body (314) in a first direction, and the communication hole (312) communicates the flow channel (313) and the first channel (321).

8. The heat exchanger according to claim 6, wherein the collector (3) further comprises a third collector plate (33) connected to the second collector plate (32) on a side facing away from the first collector plate (31);

and a second channel (331) corresponding to the first channel (321) is formed in the third collector plate (33), at least part of the heat exchange tube (21) is contained in the second channel (331), and the outer tube wall of the heat exchange tube (21) is in sealing fit with the hole wall of the second channel (331).

9. The heat exchanger according to any one of claims 6 to 8, wherein the casing (1) comprises an upper casing (11), a lower casing (12) and a lining plate (5), the lining plate (5) covers at least the joint of the upper casing (11) and the lower casing (12), and the lining plate (5) is sandwiched between the inner wall of the casing (1) and the outer wall of the second collecting plate (33).

10. The heat exchanger according to any one of claims 1 to 6, wherein the side wall (41) surface is provided with a solder layer.