CN112304122B

CN112304122B - Heat exchanger and manufacturing method thereof

Info

Publication number: CN112304122B
Application number: CN201910706981.4A
Authority: CN
Inventors: 马峥; 张伟伟; 董军启; 史鑫
Original assignee: Hangzhou Sanhua Research Institute Co Ltd
Current assignee: Hangzhou Sanhua Research Institute Co Ltd
Priority date: 2019-08-01
Filing date: 2019-08-01
Publication date: 2022-06-17
Anticipated expiration: 2039-08-01
Also published as: CN112304122A

Abstract

The application relates to the technical field of heat exchange, in particular to a heat exchanger and a manufacturing method of the heat exchanger. The heat exchanger comprises a collecting pipe and a main board, wherein the collecting pipe comprises an inner cavity, a first mounting structure and a first mounting groove formed in the first mounting structure, a first limiting part is arranged in the first mounting structure, and the first mounting groove is communicated with the inner cavity; the main board comprises a second mounting structure positioned on one side of the main board and a second mounting groove formed in the second mounting structure, the second mounting groove penetrates through the surfaces of the two sides of the main board, and the end part of the second mounting structure is accommodated in the first mounting groove and connected with the first limiting part. This application cooperates through the first mounting structure that will set up on the pressure manifold and the second mounting structure that sets up on the mainboard, specifically is, makes the second mounting structure with set up the first spacing portion connection in first mounting structure to the problem of the offset between pressure manifold and the mainboard has been solved.

Description

Heat exchanger and manufacturing method thereof

Technical Field

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

Background

Heat exchangers, also known as heat exchangers, are widely used in heat exchange systems (e.g., air conditioning systems). The heat exchanger can be used for heat exchange between a refrigerant and external air and also can be used for heat exchange between the refrigerant and cooling liquid.

The inventors found that the following problems exist in the related art: as shown in fig. 1, the related heat exchanger includes a header 1 'and a main plate 2', and when the header 1 'and the main plate 2' are assembled, the positions of the header heat exchange groove 11 'and the corresponding main plate heat exchange groove 21' (both for positioning the heat exchange tubes) are easily shifted.

Disclosure of Invention

The application provides a heat exchanger and a manufacturing method of the heat exchanger, so that the position between a collecting pipe and a main board is not prone to shifting.

The application provides in a first aspect a heat exchanger comprising:

the collecting pipe comprises an inner cavity, a first mounting structure and a first mounting groove formed in the first mounting structure, a first limiting part is arranged in the first mounting structure, and the first mounting groove is communicated with the inner cavity;

the main board comprises a second mounting structure positioned on one side of the main board and a second mounting groove formed in the second mounting structure, the second mounting groove penetrates through the surfaces of two sides of the main board, and the end part of the second mounting structure is accommodated in the first mounting groove and connected with the first limiting part.

Optionally, the first limiting portion includes an annular step arranged on a groove wall of the first mounting groove.

Optionally, the collecting pipe is provided with a first positioning structure, the main board is provided with a second positioning structure, and the first positioning structure and the second positioning structure are in positioning fit.

Optionally, the heat exchanger further comprises a heat exchange tube, and the end part of the heat exchange tube is arranged in the second mounting groove;

the first mounting structure is internally provided with a second limiting part, and the end part of the heat exchange tube is connected with the second limiting part.

Optionally, the first limiting part is provided with a first limiting surface perpendicular to the insertion direction of the heat exchange tube, the second limiting part is provided with a second limiting surface perpendicular to the insertion direction of the heat exchange tube, and the first limiting surface is closer to the main board than the second limiting surface.

Optionally, the second limiting part comprises steps located on groove walls on two opposite sides of the first mounting groove, and the steps are connected with the heat exchange tube.

Optionally, the electronic device further comprises a housing, and the main board further comprises a third mounting structure located on the other side of the main board and a connection cavity formed in the third mounting structure;

the end part of the shell is accommodated in the connecting cavity, and the third mounting structure is connected with the shell.

The second aspect of the present application provides a method for manufacturing a heat exchanger, comprising the following steps:

processing a first mounting structure with a first limiting part on a collecting pipe to form a first mounting groove in the first mounting structure;

and processing a second mounting structure matched with the first mounting groove at a position corresponding to the first mounting groove on the main board, matching the first limiting part to limit the depth of the second mounting structure inserted into the first mounting groove, and forming a second mounting groove in the second mounting structure.

Optionally, the method further includes positioning the header and the main board.

Optionally, the main board is processed into the second mounting structure by a piercing and extruding process.

The technical scheme is as follows: this application cooperates through the first mounting structure that will set up on the pressure manifold and the second mounting structure that sets up on the mainboard, specifically is, makes the second mounting structure with set up the first spacing portion connection in first mounting structure to make the position between pressure manifold and the mainboard be difficult to take place the skew.

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 schematic structural view of a header and a main board in the related art;

FIG. 2 is a schematic diagram of a heat exchanger provided herein;

FIG. 3 is a partial cutaway view of the heat exchanger shown in FIG. 2;

FIG. 4 is a schematic cross-sectional view of the heat exchanger shown in FIG. 2;

FIG. 5 is an enlarged, fragmentary schematic view of the heat exchanger of FIG. 4;

FIG. 6 is an enlarged schematic view at A in FIG. 5;

FIG. 7 is a schematic illustration provided for another embodiment of FIG. 6;

FIG. 8 is an exploded view of FIG. 5;

FIG. 9 is an enlarged schematic view at B of FIG. 8;

FIG. 10 is an enlarged schematic view at C of FIG. 8;

FIG. 11 is a schematic view of the main board of FIG. 2 from a perspective;

FIG. 12 is a schematic view of the main board of FIG. 2 from another perspective;

FIG. 13 is a schematic structural view of the header of FIG. 2;

FIG. 14 is a front view of the manifold shown in FIG. 13;

FIG. 15 is an enlarged view of a dotted line portion of the motherboard shown in FIG. 14;

FIG. 16 is a cross-sectional view of the main plate of FIG. 14;

fig. 17 is an exploded view of the heat exchanger of fig. 2.

Reference numerals:

1' -header;

11' -collecting pipe heat exchange pipe groove;

2' -a main board;

21' -a main board heat exchange pipe groove;

1-collecting pipe;

11-a first mounting structure;

111-a first stop;

111 a-a first limiting surface;

111 b-a third limiting surface;

111 c-bevel;

112-a second limit part;

112 a-a second stop surface;

112 b-a fourth limiting surface;

113-a first mounting groove;

121-a first positioning structure;

122-positioning hole

13-lumen;

14-a blocking cap;

15-liquid inlet;

16-a liquid outlet;

17-a platen;

2, a main board;

21-a second mounting structure;

211-a first abutment surface;

212-a second abutment surface;

213-cambered surface;

214-a second mounting groove;

221-a second positioning structure;

222-a guide arc;

23-a third mounting structure;

231-a connecting cavity;

232-notch;

3, heat exchange tubes;

31-a third abutment surface;

4-a shell;

41-liquid inlet pipe;

42-a liquid outlet pipe;

5-a fin;

6-lining plate.

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 through intervening elements.

The heat exchanger is one of the main components of the automobile air conditioner, and needs to be improved and optimized according to the market requirements. In the related art, the collecting pipe is manufactured by machining a section bar, and is not provided with a composite material for brazing (hereinafter, referred to as a composite material); the heat exchange tube adopts a section without composite materials, and the necking of the heat exchange tube is difficult to process and even leads to the deformation and bending of the necking after processing due to the harder material and wider width, so the necking of the heat exchange tube is milled by adopting a machine at present; the main board is made of a plate with composite materials on two sides through machining, so that the composite materials on the two sides of the main board are respectively attached and brazed with the collecting pipe heat exchange pipe groove and the heat exchange pipe necking.

In the course of implementing the present application, the inventors found that the following problems exist in the related art: as shown in fig. 1, the related heat exchanger includes a header 1 'and a main board 2', and when the header 1 'and the main board 2' are assembled, positions of a header heat exchange tube slot 11 'and a corresponding main board heat exchange tube slot 21' (both of which are used for positioning a heat exchange tube) are prone to shift, which further causes inconsistent refrigerant distribution resistance and affects heat exchange performance of the heat exchanger.

The application provides a heat exchanger and a manufacturing method of the heat exchanger, so that the position between a collecting pipe and a main board is not prone to shifting. See below for a description of specific embodiments.

As shown in fig. 2 to 4, the heat exchanger provided by the present application at least comprises a header assembly and a heat exchange tube 3 (see fig. 3), wherein the header assembly comprises a header 1 and a main plate 2, and the heat exchange tube 3 is inserted into the main plate 2 and the header 1 in sequence, so that the following explanation of the matching relationship of the parts according to the insertion direction of the heat exchange tube 3 is possible.

In this application, the pressure manifold subassembly can be two and be located the both ends of heat exchange tube 3, and pressure manifold 1 is connected with inlet 15 and liquid outlet 16, and the refrigerant can enter into one of them pressure manifold 1 from inlet 15, gets into another pressure manifold 1 and discharges from liquid outlet 16 through heat exchange tube 3. The liquid inlet 15 and the liquid outlet 16 may be connected to an external device (e.g., a device for supplying a cooling medium) through a pressure plate 17.

It can be understood that one or more collecting pipe assemblies may be provided, and the refrigerant can also enter and exit through the communication mode of the collecting pipe 1 and the heat exchange pipe 3, and the number of the collecting pipe assemblies is not specifically limited in this application.

Specifically, referring to fig. 16 (for illustrating the relationship between the liquid inlet 15 and the plurality of inner cavities 13), a plurality of inner cavities 13 communicating with the liquid inlet 15 or with the liquid outlet 16 are provided in each header 1, both ends or one end of each inner cavity 13 communicates with the outside, and a blocking cap 14 is provided at the communicating port between the inner cavity 13 and the outside for blocking the inner cavity 13. For example, the refrigerant enters the inside of the header 1 from the liquid inlet 15, because the inner cavities 13 are arranged along the first mounting grooves 113, and the first mounting grooves 113 are communicated with the inner cavities 13, the refrigerant fills each inner cavity 13 with the refrigerant through the first mounting grooves 113, and then the refrigerant enters another header 1 through the heat exchange tubes 3 inserted into the first mounting grooves 113 and is discharged through the liquid outlet 16.

Referring to fig. 2 and fig. 3, as shown in the positions of the heat exchangers, in the present application, when a refrigerant enters the right collecting pipe 1, the refrigerant in the collecting pipe 1 may first enter a part of the inner cavities 13, and the refrigerant first enters the left collecting pipe 1 through a part of the heat exchange tubes 3 and enters all the inner cavities 13 in the left collecting pipe 1, so that a part of the heat exchange tubes 3 exchange heat first. Then, the refrigerant returns to the right collecting pipe 1 from the left collecting pipe 1 through another part of the heat exchange tubes 3 in a unified manner, so that the heat exchange is performed through the remaining part of the heat exchange tubes 3, which is called as "double-flow-path heat exchange" or "bidirectional heat exchange". It can be understood that the above flow path can be realized by arranging the communication mode of the collecting pipe 1 and the heat exchange pipe 3, for example, by arranging a partition plate inside the collecting pipe 1, so that the heat exchanger can realize double-flow-path or even multi-flow-path heat exchange (also called bidirectional or multidirectional heat exchange).

Optionally, the inner cavity 13 of the header pipe 1 provided by the present application is vertically communicated with the first mounting groove 113, so that lamination generated in a refrigerant flowing process can be reduced, and resistance in the refrigerant flowing process can be further reduced, so as to improve the heat exchange performance of the heat exchanger. Of course, the inner cavity 13 may also be in parallel communication or in oblique communication with the first mounting groove 113, and the positional relationship between the inner cavity 13 and the first mounting groove 113 is not limited in this application.

Referring to fig. 17, in the present application, a plurality of heat exchange tubes 3 connected between two header assemblies may be provided, and fins 5 are fixed between two adjacent heat exchange tubes 3 (fig. 17 only shows the fins 5 fixed to the heat exchange tubes 3 on two sides), and optionally, the fins 5 may be fixed to the heat exchange tubes 3 by welding, so as to improve the heat exchange efficiency of the heat exchange tubes 3. A plurality of heat exchange tubes 3 and rather than 5 fixed fins of constituteing the heat transfer core jointly, be provided with casing 4 in the outside of heat transfer core, casing 4 is connected with feed liquor pipe 41 and drain pipe 42 respectively, and the coolant liquid (for example can be the mixed solution of water or water and ethanol) enters into between casing 4 and the heat transfer core by feed liquor pipe 41, makes coolant liquid and refrigerant carry out the heat transfer, and the coolant liquid after the heat transfer is again by drain pipe 42 discharge heat exchanger to can realize making the effect that the coolant liquid heaied up or reduced the temperature.

Since the number and size of the heat exchange tubes 3 are determined according to actual conditions, the shell 4 can be formed by assembling. In the assembly forming process of the shell 4, the sub-shells can be fixed with the outer wall surface of the heat exchange tube 3 by additionally arranging the lining plate 6 or directly (for example, brazing can be adopted for fixing), the lining plate 6 can be additionally arranged inside or outside the shell 4, and the lining plate 6 covers the gaps formed by splicing the sub-shells. The lining plate 6 can be understood as a baffle plate, i.e. has the function of blocking the coolant from flowing out from between the individual partial shells and at the same time has a fixed connection with the individual partial shells. By the arrangement mode, the cost input of the shell 4 manufacturing die can be reduced, the process assembly flow can be simplified, and the risk of sinking or non-welding of the shell 4 after brazing can be reduced.

It is understood that the shell 4 may be assembled by two U-shaped shells, two L-shaped shells, or four flat-plate shells, and the assembling process may be welding (e.g. soldering), riveting, screwing, or other fixing methods. Alternatively, in another embodiment, the housing 4 may be an integrally formed structure.

Specifically, referring to fig. 5 to 12, the header 1 includes an inner cavity 13, a first mounting structure 11 and a first mounting groove 113 formed in the first mounting structure 11, the first mounting structure 11 is provided with a first limiting portion 111, the main board 2 includes a second mounting structure 21 located at one side of the main board 2 and a second mounting groove 214 formed in the second mounting structure 21, the second mounting groove 214 penetrates through surfaces at two sides of the main board 2, and an end portion of the second mounting structure 21 is accommodated in the first mounting groove 113 and connected to the first limiting portion 111. This application cooperates through setting up first mounting structure 11 on pressure manifold 1 and setting up the second mounting structure 21 on mainboard 2, specifically, make second mounting structure 21 be connected with the first spacing portion 111 that sets up in first mounting structure 11, thereby the problem of the skew of position between pressure manifold 1 and mainboard 2 has been solved, the possibility that skew or dislocation take place in the ascending position of heat exchange tube 3 insertion side to first mounting structure 11 and second mounting structure 21 has been reduced, make the installation of heat exchange tube 3 more convenient.

It can be understood that the end of the second mounting structure 21 is connected to the first position-limiting portion 111, which means that when the assembled heat exchanger is heated and brazed after the two are abutted against each other, the composite material (flux) on the surface of the main plate 2 is in a molten state, so as to fix the end of the second mounting structure 21 and the first position-limiting portion 111. That is, the end of the second mounting structure 21 is substantially fixedly connected to the first stopper 111, so that the problem of the position deviation between the header 1 and the main plate 2 is solved.

It should be noted that, in the related art, since the surfaces of the collecting pipe and the heat exchange pipe are not provided with the composite material, the main plate with the double-sided composite material is placed between the collecting pipe and the heat exchange pipe. However, the inner wall of the heat exchange tube slot (corresponding to the second mounting slot 214) of the main board is not provided with a composite material due to machining, so that only the composite solder on the surface flows into the heat exchange tube slot of the main board when the heat exchange tube is brazed with the heat exchange tube slot of the main board, thereby causing the tolerance requirement of the heat exchange tube slot of the main board to be strict and the brazing strength of the heat exchange tube and the main board to be insufficient. In the present application, the second mounting structure 21 accommodated in the first mounting groove 113 is disposed on one side of the main board 2, so that not only the welding area of the inner cavity of the heat exchange tube 3 and the second mounting groove 214 is greatly increased, i.e., the welding strength between the main board 2 and the heat exchange tube 3 is increased, but also the welding area between the first mounting structure 11 and the second mounting structure 21 is increased, i.e., the welding strength between the header pipe 1 and the main board 2 is increased.

Further, with reference to fig. 6, in a direction perpendicular to the inserting direction of the second mounting structure 21 (the inserting direction may also refer to a direction from the header 1 to the main plate 2 or an inserting direction of the heat exchange tube 3), the first limiting portion 111 includes a first limiting surface 111a, the second mounting structure 21 includes a first abutting surface 211, and the first limiting surface 111a is fixedly connected to the first abutting surface 211. Compared with the current collecting pipe assembly in the related art, the main board and the current collecting pipe do not have a flanging limiting arrangement mode, the first limiting face 111a is arranged in the first limiting portion 111, the second mounting structure 21 is favorably formed, the consistency and controllability of the sizes of all the second mounting structures 21 and the second mounting grooves 214 of the formed main board 2 are good, the thickness of the groove wall of the first mounting groove 113 in the inserting direction perpendicular to the second mounting structures 21 can be increased, and the structural strength of the current collecting pipe 1 is further improved.

The dimension of the first stopper surface 111a does not exceed the dimension of the first abutment surface 211 in the direction perpendicular to the insertion direction of the second mounting structure 21. Due to the arrangement, the possibility that the first limiting surface 111a blocks the insertion of the heat exchange tube 3 can be reduced, the heat exchange tube 3 can be better inserted, and the end part of the heat exchange tube 3 is closer to the inner cavity of the collecting pipe 1 or enters the inner cavity of the collecting pipe 1.

Referring to fig. 7, along the insertion direction perpendicular to the second mounting structure 21, the size of the first limiting surface 111a is larger than the size of the first abutting surface 211, and the second limiting surface 112a is closer to the motherboard 2 relative to the first limiting surface 111a, so that an accommodating groove for accommodating the end of the second mounting structure 21 is formed between the first limiting portion 111 and the second limiting portion 112, a fine gap may be formed between the accommodating groove and the second mounting structure 21, at high temperature, the flux coated on the motherboard 2 melts, and the fine gap is beneficial to the capillary phenomenon during welding, thereby facilitating the flow of the solder during welding, and making the welding more uniform. Thus, the contact area between the two is reduced, the thickness of the second mounting structure 21 is reduced, and the weight of the main board 2 is reduced.

With reference to fig. 9 and 10, along a direction parallel to the insertion direction of the second mounting structure 21, the first limiting portion 111 includes a third limiting surface 111b, the second mounting structure 21 includes a second abutting surface 212, and the third limiting surface 111b is fixedly connected to the second abutting surface 212. The third limiting surface 111b is perpendicularly connected with the first limiting surface 111a, and the second abutting surface 212 is perpendicularly connected with the first abutting surface 211, so that the fixing effect and the sealing effect of the second mounting structure 21 and the first limiting portion 111 are further improved by the fixed connection of the first limiting surface 111a and the first abutting surface 211 and the fixed connection of the third limiting surface 111b and the second abutting surface 212.

It can be understood that the first and third limiting surfaces 111a and 111b form an annular step, that is, the first limiting portion 111 is an annular step disposed on a groove wall of the first mounting groove 113, so as to better limit the second mounting structure 21.

To facilitate the insertion of the second mounting structure 21 into the first mounting groove 113, the first limiting portion 111 further includes an inclined surface 111c connected to the third limiting surface 111b, the second mounting structure 21 further includes an arc surface 213 connected to the second abutting surface 212, and the inclined surface 111c is opposite to the arc surface 213. Since the arc surface 213 is generated when the second mounting structure 21 is opened or formed, if the third limiting surface 111b of the first limiting portion 111 is vertically connected to the outer wall surface of the header 1, the arc surface 213 cannot be avoided, which may result in poor fixing connection effect between the first limiting surface 111a and the first abutting surface 211 and between the third limiting surface 111b and the second abutting surface 212. Alternatively, the inclined surface 111c may be chamfered or rounded.

Collecting main 1 and/or mainboard 2 are provided with location structure, make collecting main 1 and mainboard 2 have the same processing benchmark when adding man-hour through setting up location structure, so can greatly reduce the deviation that second mounting groove 214 takes shape, improved the cooperation precision of both sides collecting main 1 and heat exchange tube 3.

Referring to fig. 11 to 14, the header 1 is provided with a first positioning structure 121, the main plate 2 is provided with a second positioning structure 221, and the first positioning structure 121 and the second positioning structure 221 are in positioning fit. Referring to fig. 1, fig. 2 and fig. 11, the positioning structure (or the first positioning structure 121 and the second positioning structure 221) may be a riveting structure, for example, the first positioning structure 121 may be a protrusion, the second positioning structure 221 may be a groove, or vice versa, or both the first positioning structure 121 and the second positioning structure 221 may be holes, and the two are fixedly connected by a bolt or the like, so as to realize the positioning and fixing of the two. Optionally, three positioning holes 122 are formed in the header 1, and the positioning holes are distributed in a triangular shape, so that the header 1 can be positioned more stably. When the collecting pipe 1 is machined, firstly, the collecting pipe 1 is positioned and fixed on a corresponding die through the positioning hole 122, and a first mounting groove 113 is machined in the collecting pipe 1; and then positioning the main plate 2 and the header 1 through the first positioning structure 121 and the second positioning structure 221, and machining a second mounting structure 211 and a second mounting groove 214.

Optionally, the main board 2 may also be fixed to the header 1 through the positioning holes 122 (for example, riveted), so that before the second mounting structure 21 is formed, the main board 2 is riveted to the three positioning holes 122 through a tool, so as to enhance the attachment and fixation of the main board 2 to the header 1, so that the main board 2 does not shift during the flanging process (i.e., during the forming process of the second mounting structure 21); and also do benefit to the transportation of pressure manifold 1 and mainboard 2 sub-assembly after the riveting, make both fixed connection in the transportation, become the sub-assembly transportation, prevent both droops.

Referring to fig. 12, the main board 2 is further provided with a guiding arc 222 along a direction away from the second mounting structure 21, and the guiding arc 222 is connected between a wall of the second mounting groove 214 and a surface of the main board 2. The guide arc 222 plays a role in guiding the heat exchange tube 3 during assembly of the heat exchange tube 3, thereby facilitating control of assembly precision and facilitating easier realization of assembly operation.

With reference to fig. 6 and 9, the first mounting structure 11 is further provided with a second limiting portion 112, and the end of the heat exchange tube 3 is fixedly connected to the second limiting portion 112 along the direction perpendicular to the insertion direction of the second mounting structure 21. In the correlation technique, the heat exchange tube is hard and wide in width, so that the necking of the heat exchange tube is deformed and bent after the die is opened, and the current necking of the heat exchange tube is milled by machining in consideration of positioning the heat exchange tube, so that the machining cost of the heat exchange tube is high, and the heat exchange tube cannot be produced and processed in batches. In the application, the second limiting part 112 is arranged in the first mounting structure 11 to be used for positioning the heat exchange tube 3, so that the heat exchange tube 3 does not need to be positioned in a necking mode in the related art, the manufacturing process of the heat exchange tube is simplified, and the cost is saved.

Specifically, the second limiting portion 112 has a second limiting surface 112a along a direction perpendicular to the insertion direction of the second mounting structure 21 (the insertion direction may also refer to a direction from the header 1 to the main plate 2 or an insertion direction of the heat exchange tube 3), the heat exchange tube 3 includes a third abutting surface 31, and the second limiting surface 112a is fixedly connected with the third abutting surface 31. The second position-limiting portion 112 further includes a fourth position-limiting surface 112b vertically connected to the second position-limiting surface 112a, and the fourth position-limiting surface 112b is also vertically connected to the first position-limiting surface 111 a. As can be seen from fig. 6, the fourth limiting surface 112b is not in contact with the circumferential wall surface of the heat exchange tube 3, because the second limiting portion 112 can position the heat exchange tube 3 only by limiting the third abutting surface 31 of the heat exchange tube 3 by the second limiting surface 112a, the second limiting surface 112a can reduce or prevent the shielding of the microchannel of the heat exchange tube 3, and the fourth limiting surface 112b can also be in contact with the circumferential wall surface of the heat exchange tube 3.

In the direction from the collecting pipe 1 to the main board 2, the first limiting surface 111a is closer to the main board 2 than the second limiting surface 112a, so that the groove walls of the heat exchange pipe 3 and the second mounting groove 214 can be ensured to have a large enough welding area, and the fixing strength of the heat exchange pipe 3 and the main board 2 can be ensured.

Referring to fig. 7, in the direction from the header 1 to the main plate 2, the first position-limiting surface 111a is farther from the main plate 2 than the second position-limiting surface 112a, so that the heat exchange tube 3 is welded to only a portion of the groove wall of the second mounting groove 214, and the groove wall of the second mounting groove 214 can be thinned to reduce the weight of the main plate 2.

Since the second position-limiting portion 112 is used for positioning the heat exchange tube 3, so that the heat exchange tube 3 does not need to be positioned by necking in the related art, the second position-limiting portion 112 may be circumferentially disposed in the first installation groove 22 (i.e., the second position-limiting portion 112 is disposed in an annular step manner), or may be disposed at a certain position in the second installation groove 214 (i.e., the second position-limiting portion 112 is disposed in a step manner on the groove walls of the first installation groove 113 on opposite sides). Optionally, referring to fig. 13 to 15, in the insertion direction perpendicular to the second mounting structure 21, the second limiting portion 112 is disposed at the end of the first mounting groove 22, because the heat exchange tube 3 is connected to the second limiting portion 112, the heat exchange tube 3 is provided with a plurality of microchannels, if the second limiting portion 112 is partially disposed in the first mounting groove 22, interference of the second limiting portion 112 on the microchannels can be reduced, and the flow resistance of the refrigerant can be reduced, so that the second limiting portion 112 is optionally disposed at the end of the first mounting groove 22 in the width direction of the heat exchange tube 3, that is, the second limiting portion 112 includes steps on the groove walls on the two opposite sides of the first mounting groove 113.

In the related art, the water shell (equivalent to the housing 4 in the present application) is attached to the surface of the main board in a manner of fitting the water shell to the main board, and the water shell is easily not welded due to the influence of expansion with heat and contraction with cold during the brazing process. And the connected mode of mainboard and water shell probably causes the liquid side to leak owing to not being connected the packing force, if design into flange structure with the terminal surface of water shell, then can cause the binding face all around of mainboard great, and then cause the corresponding increase of pressure manifold size, refrigerant impact volume also corresponding increase. To solve the above problem, a third mounting structure 23 is provided on the main board 2 to pre-tighten the end of the housing 4 (e.g., pre-tighten by welding).

Specifically, referring to fig. 2 to 5, 8, 11 and 12, the main board 2 further includes a third mounting structure 23 located at the other side of the main board 2 and a connecting cavity 231 formed in the third mounting structure 23, the end of the housing 4 is accommodated in the connecting cavity 231, and the third mounting structure 23 is connected to the housing 4 to facilitate the assembly and welding of the main board 2 and the housing 4. The third mounting structure 23 that this application provided has increased the area of weld of mainboard 2 and casing 4 on the one hand, and on the other hand the packing force that naturally forms when the assembly does benefit to the process of brazing expend with heat and contract with cold characteristic, very big reduction the leakage rate after the brazing for overall structure is simple firm and multi-purpose.

Referring to fig. 11 and 12, the third mounting structures 23 are four segments and are uniformly distributed around the main board body 21, a gap 232 is disposed between two adjacent segments of the third mounting structures 23, and the third mounting structures 23 of the main board are easier to form by disposing the gap 232. Of course, the gap 232 may not be provided between the third mounting structures 23, as the case may be.

The present application further provides a method for manufacturing a heat exchanger, wherein the header assembly of the heat exchanger manufactured by the method has all the features and functions of the above-mentioned header assembly. The manufacturing method of the heat exchanger comprises the following steps:

positioning the collecting pipe 1:

for example, the header 1 is positioned by a groove, a column, a hole, etc. having a positioning function, and the present application may be selected by machining three positioning holes 122 on the header 1.

Processing a first mounting structure 11 with a first limiting part 111 on the collecting pipe 1, so as to form a first mounting groove 113 in the first mounting structure 11:

the first mounting structure 11 and the first stopper portion 111 provided in the first mounting structure 11 are machined with reference to the three positioning holes 122.

Further, a second limiting portion 112 for positioning the heat exchange tube 3 can be machined in the first mounting structure 11 continuously or simultaneously.

Positioning the main board 2:

alternatively, the main plate 2 is positioned with the same positioning reference as that for the header 1. For example, after the header pipe 1 is machined, the main plate 2 is covered on the wall surface of the header pipe 1, where the first mounting groove 113 is formed, and is riveted with the main plate 2 by using the three positioning holes 122; of course, the main plate 2 may also be positioned by using the same positioning structures (e.g., the first positioning structure 121 and the second positioning structure 221), as long as the main plate 2 is ensured to be positioned by the same positioning reference as that of the header 1.

The second mounting structure 21 matched with the first mounting groove 113 is processed at the position corresponding to the first mounting groove 113 on the main board 2, and the first limiting part 111 is matched to limit the depth of the second mounting structure 21 inserted into the first mounting groove 113, so that a second mounting groove 214 is formed in the second mounting structure 21:

first, the main board 2 may adopt a plate stamping structure, and both surfaces of the plate are provided with the composite material, and the third mounting structure 23 is formed by stamping through a die.

Secondly, the main board 2 processes the second mounting structure 21 by using the header pipe 1 processed with the first mounting groove 113 as a mold, and at this time, the header pipe 1 plays a role of a lower mold of the mold and cooperates with the first limiting part 111 to limit the depth of the second mounting structure 21 inserted into the first mounting groove 113. The assembly processing mode of the collecting pipe 1 and the main board 2 enables the processing precision of the second mounting groove 214 to be higher, batch processing of assemblies is easy to achieve, and meanwhile, the cost of the die is reduced.

Optionally, the main board 2 is processed into the second mounting structure 21 by using a piercing and extruding process, a previous blanking and stamping mode is changed, the second mounting structure 21 is naturally formed due to structural characteristics of the collecting pipe 1 after piercing and extruding, the die process is simple, and the first mounting groove 113 of the collecting pipe 1 is matched with the die process precisely. Meanwhile, the inner wall of the formed second mounting groove 214 can be ensured to still have the composite material, and further the welding strength of the second mounting groove 214 and the heat exchange tube 3 is ensured.

In summary, according to the manufacturing method of the header assembly provided by the present application, the second mounting structure 21 is processed on the main board 2, the first mounting structure 11 is processed on the header 1, the first limiting portion 111 is processed on the first mounting structure 11, and the depth of the second mounting structure 21 inserted into the first mounting groove 113 is limited by the first limiting portion 111, so that the problem that the position between the header and the main board is prone to shifting is solved.

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, improvement and the like 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:

the collecting pipe (1) comprises an inner cavity (13), a first mounting structure (11) and a first mounting groove (113) formed in the first mounting structure (11), wherein a first limiting part (111) and a second limiting part (112) are arranged in the first mounting structure (11), the first limiting part (111) and the second limiting part (112) are formed in the groove wall of the first mounting groove (113), the first limiting part (111) and the second limiting part (112) are connected to form a stepped structure, the first mounting groove (113) is communicated with the inner cavity (13), the first limiting part (111) comprises annular steps arranged on the groove wall of the first mounting groove (113), and the second limiting part (112) comprises steps positioned on the groove walls of two opposite sides of the first mounting groove (113);

the main board (2) comprises a second mounting structure (21) positioned on one side of the main board (2) and a second mounting groove (214) formed in the second mounting structure (21), the second mounting groove (214) penetrates through the surfaces of two sides of the main board (2), and the end part of the second mounting structure (21) is accommodated in the first mounting groove (113) and is connected with the first limiting part (111);

the end part of the heat exchange tube (3) is arranged in the second mounting groove (214), and the end part of the heat exchange tube (3) is connected with the step of the second limiting part (112).

2. A heat exchanger according to claim 1, wherein the header (1) is provided with a first positioning structure (121), the main plate (2) is provided with a second positioning structure (221), and the first positioning structure (121) and the second positioning structure (221) are in positioning fit.

3. The heat exchanger according to claim 1, wherein the first stopper portion (111) has a first stopper surface (111a) perpendicular to an insertion direction of the heat exchange tube (3), and the second stopper portion (112) has a second stopper surface (112a) perpendicular to the insertion direction of the heat exchange tube (3), the first stopper surface (111a) being closer to the main plate (2) than the second stopper surface (112 a).

4. A heat exchanger according to claim 3, further comprising a casing (4), wherein the casing (4) surrounds the heat exchange tube (3), the casing (4) is connected with a liquid inlet pipe (41) and a liquid outlet pipe (42), the main plate (2) further comprises a third mounting structure (23) positioned at the other side of the main plate (2) and a connecting cavity (231) formed in the third mounting structure (23);

the end part of the shell (4) is accommodated in the connecting cavity (231), and the third mounting structure (23) is connected with the shell (4).

5. The manufacturing method of the heat exchanger is characterized by comprising the following steps of:

processing a first mounting structure (11) with a first limiting part (111) and a second limiting part (112) on a collecting pipe (1), wherein the first limiting part (111) is connected with the second limiting part (112) to form a stepped structure, so that a first mounting groove (113) is formed in the first mounting structure (11), the first limiting part (111) and the second limiting part (112) are formed on the groove wall of the first mounting groove (113), the first limiting part (111) comprises an annular step arranged on the groove wall of the first mounting groove (113), and the second limiting part (112) comprises steps arranged on the groove walls of two opposite sides of the first mounting groove (113);

a second mounting structure (21) matched with the first mounting groove (113) is processed at a position, corresponding to the first mounting groove (113), on the main board (2), the depth of the second mounting structure (21) inserted into the first mounting groove (113) is limited by matching with the first limiting part (111), and a second mounting groove (214) is formed in the second mounting structure (21);

and inserting a heat exchange tube (3) into the main plate (2) and the collecting pipe (1), wherein the step of the second limiting part (112) limits the insertion depth of the heat exchange tube (3).

6. Method for manufacturing a heat exchanger according to claim 5, characterized in that it further comprises positioning said header (1) and said main plate (2).

7. Method for manufacturing a heat exchanger according to claim 5 or 6, wherein the main plate (2) is provided with the second mounting structure (21) by a piercing extrusion process.