Heat exchanger and method of manufacturing the same

Abstract

The application relates to the heat exchange field, in particular to a heat exchanger, which comprises a header tank, a shell and a heat exchange pipe, the header tank comprises a mounting part and a first side wall part arranged around the mounting part, the heat exchange pipe is fixedly connected with the mounting part, the mounting part and the first side wall part enclose a connecting groove with an opening facing the first end, the connecting groove is matched with the first end, and the first end is at least partially located in the connecting groove; the first side wall part comprises a first side wall which is opposite to the shell, the shell comprises a second side wall part arranged around the first end, the second side wall part comprises a second side wall opposite to the first side wall, the first side wall and the second side wall are sealingly attached, and the first side wall part and the second side wall part are fixedly matched.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat exchange, in particular to a heat exchanger and a manufacturing method thereof. BACKGROUND

[0002] A heat exchanger, also known as a heat exchanger, is widely used in heat exchange systems (such as air conditioning systems). The related heat exchanger can be used for heat exchange between refrigerant and cooling liquid, and its structure is shown in Figure 1 The heat exchanger includes a header 10, a collection tank 11, a flange 5, and a shell 4. The collection tank 11 is fixed with the shell 4 through the flange 5, and the heat exchange pipe 2 is fixed through the header 10. The header 10 includes a peripheral skirt 10a formed by the edge of the header 10, which has a lateral area through which the header 10 is attached to the shell 4. In addition, the flange 5 includes a longitudinal wall 17 arranged to extend along the inner side of the four side walls 15b, 16b of the shell 4, and the longitudinal wall 17 and the bending part 20 form a plug-in slot, and the four side walls of the shell 4 extend into the plug-in slot, and the inner side wall of the shell 4 and the outer side of the longitudinal wall 17 are attached and fixed. When the above-mentioned heat exchanger works, the cooling liquid in the heat exchange cavity of the shell 4 will generate pressure on the side wall of the shell 4, and the welding seam between the four inner side walls of the shell 4 and the longitudinal wall 17 may cause the cooling liquid to leak from the heat exchange cavity. SUMMARY

[0003] In view of the above problems, the present application provides a heat exchanger to reduce the probability of cooling liquid leaking from the heat exchange cavity of the shell.

[0004] In order to achieve the above-mentioned purpose, the following technical solutions are adopted in the present application:

[0005] A heat exchanger, comprising: a header tank, a shell and a heat exchange pipe, the shell comprising a first end and a heat exchange cavity, the header tank being fixedly connected to the first end, at least part of the heat exchange pipe being located in the heat exchange cavity, one end of the heat exchange pipe being fixedly connected to the header tank, the header tank comprising a header cavity, and the inner cavity of the heat exchange pipe being in communication with the header cavity;

[0006] The header tank comprises a mounting portion and a first side wall portion arranged around the mounting portion, the heat exchange pipe being fixedly connected to the mounting portion, and the mounting portion and the first side wall portion enclosing a connecting slot with an opening facing the first end, the connecting slot being adapted to the first end, and the first end being at least partially located in the connecting slot;

[0007] The shell comprises a second side wall portion located at the first end, and the first side wall portion and the second side wall portion are sealingly attached, and the first side wall portion and the second side wall portion are fixedly connected.

[0008] Optionally, the manifold includes a first side wall, the mounting portion is arranged on the first side wall, and the first side wall is recessed at a position of the mounting portion to form the connecting groove.

[0009] Optionally, an included angle a is formed at a connection between the first side wall portion and the mounting portion, and the included angle a is greater than or less than 90°.

[0010] Optionally, an end surface of the first end is flush with a surface of the mounting portion.

[0011] Optionally, the first side wall portion includes at least one transition section, the transition section divides a wall surface of the first side wall portion into a first side wall surface and a second side wall surface, and a surface of the transition section is connected to the first side wall surface and the second side wall surface and forms a step.

[0012] Optionally, the manifold is an integrally formed structure.

[0013] Optionally, the mounting portion is provided with a protrusion on a side facing the first end, a positioning gap is formed between the protrusion and the first side wall, and the second side wall portion is accommodated in the positioning gap.

[0014] Optionally, the mounting portion is provided with a mounting hole, the mounting hole is in communication with the manifold cavity, the heat exchange pipe is fixedly connected to the mounting hole, and the heat exchange pipe is sealingly and flushly connected to the mounting hole.

[0015] Optionally, the housing further includes a second end, an outer side wall of the housing is provided with a first manifold and a second manifold in communication with the heat exchange cavity, the first manifold is arranged on the outer side wall of the housing close to the first end, and the second manifold is arranged on the outer side wall of the housing close to the second end.

[0016] Optionally, the housing further includes a heat dissipation member, the heat dissipation member is provided with a first notch portion on a side close to the first manifold and a second notch portion on a side close to the second manifold, an outer side wall of the housing close to the first end is provided with a first interface in communication with the first notch portion, and the first manifold is in communication with the heat exchange cavity through the first interface; and an outer side wall of the housing close to the second end is provided with a second interface in communication with the second notch portion, and the second manifold is in communication with the heat exchange cavity through the second interface.

[0017] A manufacturing method of a heat exchanger, including a manifold, a housing, and a heat exchange pipe, the housing having a first end and a heat exchange cavity, the manifold having a manifold cavity, and assembling the manifold, the housing, and the heat exchange pipe, the assembling step including:

[0018] A connecting groove is processed on a side wall of the manifold, and the connecting groove is used to accommodate the first end of the housing.

[0019] An installation part is arranged on the bottom wall of the connecting groove, one end of the heat exchange pipe is fixed with the installation part, and the inner cavity of the heat exchange pipe is communicated with the collecting cavity;

[0020] The first end of the shell is inserted into the connecting groove, at least part of the heat exchange pipe is placed in the heat exchange cavity, and the first side wall part of the connecting groove is sealingly fitted with the second side wall part of the shell at the first end and is fixed.

[0021] As can be seen from the above technical solution, the installation part and the first side wall part enclose a connecting groove with an opening facing the first end, the connecting groove is matched with the first end, the first end is at least partially located in the connecting groove, the first side wall part and the second side wall part of the shell are sealingly fitted, and the first side wall part and the second side wall part are fixedly fitted. Therefore, while the cooling liquid in the heat exchange cavity causes pressure on the shell, the first side wall part will generate a pressing force on the second side wall part, thereby reducing the probability of leakage of the cooling liquid from the heat exchange cavity. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structural schematic diagram of a collecting box of a related heat exchanger;

[0023] Figure 2 is a structural schematic diagram of a heat exchanger of an example embodiment one of the present application;

[0024] Figure 3 is an exploded schematic diagram of the heat exchanger of the example embodiment one of the present application;

[0025] Figure 4 is a sectional view of the heat exchanger of the example embodiment one of the present application;

[0026] Figure 5 is a structural schematic diagram of a collecting box of the example embodiment one of the present application;

[0027] Figure 6 is Figure 5 an enlarged view of the dashed area;

[0028] Figure 7 is a structural schematic diagram of a shell of the example embodiment one of the present application;

[0029] Figure 8 is a structural schematic diagram of a heat dissipation member of another embodiment of the present application;

[0030] Figure 9 is a structural schematic diagram of a collecting box of an example embodiment two of the present application;

[0031] Figure 10 is a structural schematic diagram of a heat exchanger of the example embodiment two of the present application;

[0032] Figure 11 This is a schematic diagram of the collector box structure of Exemplary Example 3 of this application;

[0033] Figure 12 This is a manufacturing process diagram of a heat exchanger according to an exemplary embodiment of this application. Detailed Implementation

[0034] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0035] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0036] It should be understood that the terms "first," "second," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, "a" or "one," and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one; "multiple" indicates two or more. Unless otherwise stated, terms such as "front," "rear," "lower," and / or "upper" are for illustrative purposes only and are not limited to a location or spatial orientation. Terms such as "comprising" or "including" indicate that the elements or objects preceding "comprising" encompass the elements or objects listed following "comprising" or "including" and their equivalents, but do not exclude other elements or objects.

[0037] The heat exchanger of an exemplary embodiment of this application will now be described in detail with reference to the accompanying drawings. Unless otherwise specified, the features of the following embodiments and implementations can complement or combine with each other.

[0038] like Figures 2 to 7 The heat exchanger shown in Embodiment 1 can be applied to various heat exchange systems, such as refrigeration systems using CO2 as a refrigerant. The heat exchanger can also be used as an evaporator, condenser, intermediate heat exchanger, etc.

[0039] In the embodiment, the heat exchanger comprises a first header tank 100, a shell 200, a plurality of heat exchange tubes 300, a plurality of heat dissipation members 400, a second header tank 500, and two supports 800. The shell 200 comprises a first end 201, a second end 202, and a heat exchange cavity. The first header tank 100 is fixedly installed on the first end 201 by brazing, the second header tank 500 is fixedly installed on the second end 202 by brazing, and the heat exchange tubes 300 are partially located in the heat exchange cavity, with two ends of the heat exchange tubes 300 respectively inserted into the first header tank 100 and the second header tank 500. The interiors of the first header tank 100 and the second header tank 500 are provided with header cavities for introducing a first heat exchange medium, and the two end faces of the heat exchange tubes 300 are respectively introduced into the corresponding header cavities, and the inner cavities of the heat exchange tubes 300 are in communication with the header cavities. The supports 800 are installed on the header tanks, and screw holes are provided on the supports 800. The heat exchanger can be fixed at a corresponding place through the supports 800.

[0040] Optionally, the number of the heat exchange tubes 300 can be one or more. When the number of the heat exchange tubes 300 is one, the heat dissipation members 400 can be two, and the heat exchange tube 300 is clamped between the two heat dissipation members 400. When the number of the heat exchange tubes 300 is two, the heat dissipation member 400 can be one, and the heat dissipation member 400 is clamped between the two heat exchange tubes 300. Of course, the heat exchange tubes 300 and the heat dissipation members 400 can both have multiple numbers, and the heat exchange tubes 300 and the heat dissipation members 400 are alternately stacked in the heat exchange cavity.

[0041] Optionally, the heat exchange tubes 300 can be micro-channel flat tubes. The heat exchange tubes 300 are arranged with multiple micro-channels along the width direction thereof, and the micro-channels extend along the length direction of the heat exchange tubes 300, so that the end portions of the heat exchange tubes 300 are in communication with the header cavities, so as to enable the first heat exchange medium to flow between the first header tank 100 and the second header tank 500. During the operation of the heat exchanger, the second heat exchange medium can be introduced into the heat exchange cavity of the shell 200, and the heat is transferred between the first heat exchange medium and the second heat exchange medium through the heat exchange tubes 300. Optionally, the first heat exchange medium is carbon dioxide refrigerant, and the second heat exchange medium can be a cooling liquid formed by mixing water and ethanol. The use of the micro-channel flat tube can better increase the strength of the heat exchange tubes 300, such as the pressure resistance, so as to improve the stability and safety of the heat exchanger. When the heat exchange tubes 300 are multiple, the multiple heat exchange tubes 300 can be arranged in parallel and at intervals. In addition, each layer of the heat exchange tubes 300 can be one micro-channel flat tube, or a wide flat tube formed by arranging multiple micro-channel flat tubes in the same plane. The type, number, and arrangement mode of the heat exchange tubes 300 are not limited in the application, and can be determined according to the application environment.

[0042] The heat dissipation piece 400 is brazed to the surface of the heat exchange pipe 300. Alternatively, the number of the heat dissipation piece 400 can be one or more, which is not limited in the application and can be set according to the specific application environment. The heat dissipation piece 400 can be a heat exchange fin, such as a sawtooth heat exchange fin, a corrugated heat exchange fin, etc., or other heat-conducting components. The heat dissipation piece 400 can be fixed on the heat exchange pipe 300 by brazing or the like, or can be fixed on the bottom plate of the collector box by the end, or can be fixed on the bottom of the collector box by the connecting piece.

[0043] The first collector box 100 and the second collector box 500 are both cuboids, and both are welded and processed from a plurality of plate pieces. Alternatively, the two collector boxes can also be an integral structure, and the inside is hollow to form a collector cavity.

[0044] Next, the first collector box 100 is taken as an example. In this embodiment, the first collector box 100 includes a first side wall 102, which is arranged towards the first end 201 of the shell 200. An installation portion 110 is arranged on the first side wall 102, and the projection of the area where the installation portion 110 is located on the plane is square.

[0045] Alternatively, the projection of the area where the installation portion 110 is located on the plane can also be circular.

[0046] The first side wall 102 is recessed to form a square connecting groove 101 on the side of the collector cavity in the area of the installation portion 110. Specifically, the recess can be formed by milling the groove on the first side wall 102 along the boundary of the area where the installation portion 110 is located by a tool, and the groove wall is a first side wall portion 120, which includes two width-direction inner wall surfaces and two length-direction inner wall surfaces. Alternatively, the area can be punched to form the recess.

[0047] The connecting groove 101 is adapted to the shape of the first end 201, i.e., the cross section of the first end 201 is also square, and the first end 201 is at least partially located in the connecting groove 101. The first end 201 can be fully inserted into the connecting groove 101, or partially inserted into the connecting groove 101.

[0048] The first collector box 100 further includes a second side wall 103, and a connecting port 104 for inputting the first heat exchange medium is arranged on the second side wall 103. The connecting port can be used to install an input connecting piece 600.

[0049] Alternatively, the end face of the first end 201 of the shell 200 is attached to the surface of the installation portion 110, i.e., the end face of the first end 201 touches the surface of the installation portion 110.

[0050] In the embodiment, the shell 200 is a split structure, which is composed of a C-shaped front water plate 240 and a C-shaped rear water plate 250, and the front water plate 240 and the rear water plate 250 have an intersection area, and the opposite two surfaces of the intersection area are coated with solder for brazing fixation. The shell 200 is provided with an opening at the end face of the first end 201 and the second end 202, which is in communication with the heat exchange cavity, so that when the shell 200 is assembled with the first collector box 100, the heat exchange pipe 300 and the heat dissipation piece 400 are sleeved into the heat exchange cavity of the shell 200. Optionally, the shell 200 at the first end 201 can also not be provided with an opening, that is, the shell 200 at the first end 201 has an end wall, and a corresponding mounting groove can be provided on the end wall for inserting the heat exchange pipe 300 or the heat dissipation piece 400, and the heat exchange pipe 300 can be inserted into the connecting groove 101 through the mounting groove, and further, the end of the heat exchange pipe 300 can be inserted into the collector cavity.

[0051] In the embodiment, the shell 200 further includes a second side wall part 210 located at the first end 201, and the outer wall surface of the first side wall part 120 and the inner wall surface of the second side wall part 210 (i.e., the groove wall of the connecting groove 101) are sealingly attached, and the first side wall part 120 and the second side wall part 210 can both be coated with solder on the corresponding wall surfaces for brazing fixation. When the heat exchanger is working, the cooling liquid entering the heat exchange cavity will cause pressure on the shell 200, and at the same time, the first side wall part 120 will also generate a pressing force on the second side wall part 210, and the welds of the first side wall part 120 and the second side wall part 210 are not in the heat exchange cavity of the shell 200, which further reduces the probability of leakage of the cooling liquid from the heat exchange cavity.

[0052] In the embodiment, the first side wall part 120 can be provided with a transition section 1201 on both inner wall surfaces in the W direction, which divides the inner wall surfaces of the first side wall part 120 in the W direction into two parts, i.e., a first side wall surface 1202 and a second side wall surface 1203, and the surface of the transition section 1201 is connected with and formed by the first side wall surface 1202 and the second side wall surface 1203. Correspondingly, the second side wall part 210 of the shell 200 also has a matching step structure to make the shell 200 and the connecting groove 101 fit together, and the step structure makes the combination of the first side wall part 120 and the second side wall part 210 more firm. The front water plate 240 and the rear water plate 250 have an intersection area, and the thickness of the intersection area is the sum of the thicknesses of the front water plate 240 and the rear water plate 250, and the intersection area can form the step structure to match the transition section 1201.

[0053] Optionally, the shell 200 can also include two or more independent side walls spliced together or integrally formed structure. Of course, in other embodiments, the first end 201 and the second end 202 of the shell 200 can also be provided with a header only one end. For the first end 201 and the second end 202 only one end provided with header, the shell 200 can also be similar to the above settings. For the shell 200, only one end of the two ends is provided with a header, the other end of the shell 200 can have an end wall to form a sealed heat exchange cavity, and the same layer has at least two rows of parallel heat exchange pipes 300, and the two rows of heat exchange pipes 300 are connected at one end close to the end wall. Optionally, in some embodiments, the heat exchanger using the above header structure can also not include the shell 200, and the first heat exchange medium flowing through the heat exchange pipe 300 is exchanged with the outside air.

[0054] In the present embodiment, the mounting portion 110 is also provided with a plurality of long strip-shaped mounting holes 1101, and the mounting holes 1101 are arranged along the L direction of the header. The L direction and the W direction are two directions perpendicular to each other. The mounting hole 1101 is communicated with the header cavity, and the heat exchange pipe 300 is fixedly connected with the mounting hole 1101, and the heat exchange pipe 300 is sealingly attached to the connection of the mounting hole 1101. The hole wall between the heat exchange pipe 300 and the mounting hole 1101 can be fixed by brazing.

[0055] Optionally, the mounting portion 110 can be provided with a plurality of mounting hole groups, and the mounting hole groups are arranged along the L direction of the header. Each mounting hole group includes two mounting holes arranged side by side, so that two heat exchange pipes arranged side by side can be inserted into the header. In some embodiments, each row of mounting hole groups can also be provided with two or more mounting holes.

[0056] The inner wall surface of the first side wall portion 120 is connected with the mounting portion 110 to form an included angle a. In the present embodiment, the size of the included angle a is equal to 90°. Optionally, the included angle a can also be greater than or less than 90°, for example, the size of the included angle a is 120°, 60°, etc. The size of the included angle a is set according to the actual situation, and the setting range is between 0° and 180°. Correspondingly, the outer wall surface of the second side wall portion 210 of the shell 200 at the first end 201 has the same size of the included angle with the surface of the mounting portion 110, so that the second side wall portion 210 and the first side wall 120 are attached.

[0057] In the present embodiment, the second header 500 also has a rectangular parallelepiped shape, and has the same size as the first header 100. The first header 500 can be provided with the same structure as the above first header 100.

[0058] The square connecting groove (not shown) of the second header tank 500 is adapted to the shape of the second end 202, i.e. the cross section of the second end 202 is also square, and the second end 202 is at least partially located in the connecting groove of the second header tank 500, and the second end 202 can be fully inserted into the connecting groove of the second header tank 500 or partially inserted into the connecting groove of the second header tank 500.

[0059] It should be noted that the second header tank 500 can be provided with a connecting port (not shown) for outputting the first heat exchange medium, so as to install the output connecting piece 700. Alternatively, the second header tank 500 can not be provided with the connecting port for outputting the first heat exchange medium, and the connecting port for outputting the first heat exchange medium can be arranged on the first header tank 100.

[0060] Alternatively, the end surface of the second end 202 of the shell 200 is attached to the surface of the mounting portion (not shown) of the second header tank 500, i.e. the end surface of the second end 202 is in contact with the surface of the mounting portion of the second header tank 500.

[0061] Alternatively, the shell 200 at the second end 202 can not be provided with an opening, i.e. the shell 200 at the second end 202 has an end wall, and a corresponding mounting groove can be arranged on the end wall for inserting the heat exchange pipe 300 or the heat dissipation piece 400, and the heat exchange pipe 300 can be inserted into the connecting groove of the second header tank 500 through the mounting groove, and further, the end portion of the heat exchange pipe 300 can be introduced into the header cavity of the second header tank 500.

[0062] In the embodiment, the connection mode of the second end 202 of the shell 200 and the second header tank 500 is the same as the connection mode of the first end 201 of the shell 200 and the first header tank 100.

[0063] In the embodiment, the outer side wall of the shell 200 is provided with a first header pipe 220 and a second header pipe 230 which communicate with the heat exchange cavity, the first header pipe 220 is arranged on the outer side wall of the front water plate 240 close to the first end 201, and the second header pipe 230 is arranged on the outer side wall of the rear water plate 250 close to the second end 202. The first header pipe 220 is used for inputting the second heat exchange medium into the heat exchange cavity, and the second header pipe 230 is used for leading the second heat exchange medium in the heat exchange cavity out. In the embodiment, the shell 200 is independently arranged with the first header pipe 220 and the second header pipe 230, and the shell 200 and the first header pipe 220 and the second header pipe 230 can be connected by welding.

[0064] In the embodiment, each heat dissipation piece 400 is provided with a first notch part 401 near one side of the first collecting pipe 220 and a second notch part 402 near one side of the second collecting pipe 230, the side wall of the shell 200 is provided with a first interface 203 communicating with the first notch part 401 near the first end 201, and the first collecting pipe 220 communicates with the heat exchange cavity through the first interface 203; the side wall of the shell 200 is provided with a second interface 204 communicating with the second notch part 402 near the second end 202, and the second collecting pipe 230 communicates with the heat exchange cavity through the second interface 204. The shell 200 is provided with a convex 260 protruding outward at the position opposite to the first notch part 401 and the second notch part 402, and a recess is formed in the shell 200 at the position of the convex 260 where the heat exchanger is located, and the second heat exchange medium converges in the recess. The first interface 203 and the second interface 204 are formed on the corresponding convex 260.

[0065] In the embodiment, the first collecting pipe 220 and the second collecting pipe 230 are diagonally arranged outside the shell 200 and located in different horizontal planes to increase the flow of the second heat exchange medium in the heat exchange cavity and make the heat exchange of the first heat exchange medium and the second heat exchange medium more sufficient. Alternatively, the first collecting pipe 220 and the second collecting pipe 230 can also be integrally formed with the shell 200.

[0066] Alternatively, as shown in Figure 8 The main body of the heat dissipation piece 400 extends to both ends to form a positioning part 403, which facilitates the positioning of the heat dissipation piece 400 and can ensure the size of the heat dissipation piece 400. The positioning part 403 is arranged in connection with the first notch part 401 or the second notch part 402. Alternatively, the end face of the positioning part 403 is a flat edge, and the edge can be in contact with the first side wall 102 of the first collecting box 100 and the side wall of the second collecting box 500. The length L of the end face can be about 5mm-10mm to ensure the flow of the second heat exchange medium and the brazing fixation of the heat dissipation piece 400.

[0067] As shown in Figure 9 , Figure 10 In the second embodiment of the present application, the structure of the collecting box is improved. Taking the first collecting box 100 as an example, the first side wall part 120 is arranged around the mounting part 110, the end of the heat exchange pipe 300 is fixedly connected with the mounting part 110, and the mounting part 110 and the first side wall part 120 enclose a connecting groove 101 with an opening facing the first end 201. It should be noted that the surface of the mounting part 110 and the surface of the first side wall 102 are located in the same plane, and the first side wall part 120 is connected with the first side wall 102. The first side wall part 120 is perpendicular to the first side wall 102.

[0068] The first end 201 of the shell 200 is accommodated in the connecting groove 101, and the outer side wall of the first end 201 is sealed and fitted with the groove wall of the connecting groove 101. Optionally, the end face of the first end 201 is in contact with the first side wall 102, and the end face of the first end 201 is fitted with the wall face of the first side wall 102. The second header tank 500 can also have the same structure as the first header tank 100.

[0069] As shown in Figure 11 embodiment three of the present application improves the structure of the header tank. Taking the first header tank 100 as an example, the mounting portion 110 is provided with a protrusion 130 on one side of the first end 201, the mounting hole 1101 is arranged on the protrusion 130, the positioning gap 1011 is formed between the protrusion 130 and the first side wall portion 120, the second side wall portion 210 is accommodated in the positioning gap 1011, and the second side wall portion 210 is sealed and fitted with the gap wall. The second header tank 500 can also have the same structure as the first header tank 100. When the heat exchange pipe 300 is inserted into the mounting hole 1101, the mounting hole 1101 is arranged on the protrusion 130, and the protrusion 130 is located in the heat exchange cavity, so that the whole heat exchange pipe 300 can also be located in the heat exchange cavity.

[0070] As shown in Figure 12 application also provides a manufacturing method of a heat exchanger. Please refer to the structure of the heat exchanger in embodiment one of the present application, the method comprises: providing components of the heat exchanger, the components comprising a first header tank 100, a shell 200, a heat exchange pipe 300, a heat dissipation piece 400 and a second header tank 500, the shell 200 having a first end 201 and a heat exchange cavity, and the header tank 100 having a header cavity. The first header tank 100 is a long rectangular structure processed by welding a plate, the shell 200 is an integral molding structure, the shell 200 comprises a first end 201 and a second end 202 arranged oppositely, the first end 201 and the second end 202 are provided with openings in the end faces, and the heat exchange pipe 300 is a micro-channel flat pipe.

[0071] The first header tank 100, the shell 200, the heat exchange pipe 300, the heat dissipation piece 400 and the second header tank 500 are assembled, and the main assembly steps comprise:

[0072] Step S1: a connecting groove 101 capable of accommodating the first end 201 of the shell 200 is formed in one side wall of the first header tank 100 by milling, and the same operation is performed on the second header tank 500;

[0073] Step S2: An installation part 110 is arranged on the bottom wall of the connecting groove 101, one end of the heat exchange pipe 300 is fixed with the installation part 110, and the inner cavity of the heat exchange pipe 300 is communicated with the collecting cavity;

[0074] Specifically, the step S2 includes: the heat exchange pipe 300 and the heat dissipation piece 400 are alternately stacked together, and the connection part of the heat exchange pipe 300 and the heat dissipation piece 400 can be coated with solder as needed. The installation hole 1101 corresponding to the heat exchange pipe 300 is arranged on the installation part 110, one end of the heat exchange pipe 300 is inserted into the installation hole 1101, and the end surface of the heat exchange pipe 300 is located in the collecting cavity, so that the collecting cavity and the inner cavity of the heat exchange pipe 300 are communicated, thereby completing the plug-in connection of the heat exchange pipe 300 and the first collecting box 100. If necessary, the hole wall around the installation hole 1101 can also be coated with solder, so that the brazing fixation is completed in step S3.

[0075] Step S3: The first end 201 of the shell 200 is inserted into the connecting groove 101, at least part of the heat exchange pipe 300 is placed in the heat exchange cavity through the opening, the groove wall of the connecting groove 101 is sealingly attached to the outer wall of the first end 201 of the shell 200, the second collecting box 500 is fixed to the second end 202, and finally the brazing fixation is performed.

[0076] Optionally, the milling groove step of the second collecting box 500 and the milling groove step of the first collecting box 100 can be interchanged, or they can be performed simultaneously, and the two collecting boxes are processed and then step S2 is performed. Alternatively, the milling groove step of the second collecting box 500 can also be placed after step S2.

[0077] In the step S3, after the first end 201 of the shell 200 is inserted into the connecting groove 101, the other end of the heat exchange pipe 300 is fixedly connected with the second collecting box 500 through the installation hole of the second collecting box 500.

[0078] It should be noted that before the plug-in connection of the heat exchange pipe 300 and the second collecting box 500 is completed, an installation part (not shown) is arranged on the side wall corresponding to the second collecting box 500, and an installation hole is formed on the installation part of the second collecting box 500. This step can be performed simultaneously with the milling groove step of the second collecting box 500, or it can be performed separately.

[0079] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with the preferred embodiments as above, it is not intended to limit the present application, and any person skilled in the art can make some minor changes or modifications to the above disclosed technical contents to make equivalent embodiments with equivalent changes, without departing from the scope of the technical solutions of the present application. Any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, without departing from the content of the technical solutions of the present application, still belongs to the scope of the technical solutions of the present application.

Claims

1. A heat exchanger, characterized in that, include: The system comprises a manifold (100), a housing (200), and a heat exchange tube (300). The housing (200) includes a first end (201) and a heat exchange cavity. The manifold (100) is fixedly connected to the first end (201). At least a portion of the heat exchange tube (300) is located in the heat exchange cavity. One end of the heat exchange tube (300) is fixedly connected to the manifold (100). The manifold (100) includes a collection cavity, and the inner cavity of the heat exchange tube (300) communicates with the collection cavity. The manifold (100) includes a mounting portion (110) and a first sidewall portion (120) surrounding the mounting portion (110). The heat exchange tube (300) is fixedly connected to the mounting portion (110). The mounting portion (110) and the first sidewall portion (120) enclose a connecting groove (101) with an opening facing the first end (201). The connecting groove (101) is adapted to the first end (201), and the first end (201) is at least partially located within the connecting groove (101). The housing (200) includes a second sidewall portion (210) located at the first end (201). The first sidewall portion (120) and the second sidewall portion (210) are sealed together and fixedly fitted. The connection between the first sidewall portion (120) and the mounting portion (110) forms an included angle α, which is greater than 90°. The first sidewall portion (120) includes a transition section (1201) that divides the wall surface of the first sidewall portion (120) into a first sidewall surface (1202) and a second sidewall surface (1203). The surface of the transition section (1201) is connected to the first sidewall surface (1202) and the second sidewall surface (1203) to form a step.

2. A heat exchanger as described in claim 1, characterized in that, The collector box (100) includes a first sidewall (102), and the mounting part (110) is disposed on the first sidewall (102). The first sidewall (102) is recessed on the side of the mounting part (110) facing the collector cavity to form the connecting groove (101).

3. A heat exchanger as described in claim 1 or 2, characterized in that, The collector box (100) is a one-piece molded structure.

4. A heat exchanger as described in claim 1 or 2, characterized in that, The mounting portion (110) has a protrusion (130) on the side facing the first end (201), and a positioning gap (1011) is formed between the protrusion (130) and the first side wall portion (120), and the second side wall portion (210) is accommodated in the positioning gap (1011).

5. A heat exchanger as described in claim 1 or 2, characterized in that, The mounting part (110) includes a mounting hole (1101), which communicates with the collection cavity. The heat exchange tube (300) is fixedly connected to the mounting hole (1101), and the connection between the heat exchange tube (300) and the mounting hole (1101) is sealed and fitted.

6. A heat exchanger as described in claim 1 or 2, characterized in that, The housing (200) further includes a second end (202). The outer side wall of the housing (200) is provided with a first manifold (220) and a second manifold (230) that communicate with the heat exchange chamber. The first manifold (220) is located on the outer side wall of the housing (200) near the first end (201), and the second manifold (230) is located on the outer side wall of the housing (200) near the second end (202).

7. A heat exchanger as described in claim 6, characterized in that, It also includes a heat sink (400), which has a first notch (401) on the side near the first manifold (220) and a second notch (402) on the side near the second manifold (230). The sidewall of the housing (200) near the first end (201) has a first interface (203) communicating with the first notch (401), and the first manifold (220) communicates with the heat exchange chamber through the first interface (203). The sidewall of the housing (200) near the second end (202) has a second interface (204) communicating with the second notch (402), and the second manifold (230) communicates with the heat exchange chamber through the second interface (204).

8. A method for manufacturing a heat exchanger, characterized in that, include: The assembly comprises a manifold (100), a shell (200), and heat exchange tubes (300). The shell (200) has a first end (201) and a heat exchange cavity. The manifold (100) has a collection cavity. The manifold (100), the shell (200), and the heat exchange tubes (300) are assembled. The assembly steps include: A connecting groove (101) is formed on one side wall of the collector (100), and the connecting groove (101) is used to accommodate the first end (201) of the housing (200); An installation part (110) is provided on the bottom wall of the connecting groove (101) to fix one end of the heat exchange tube (300) to the installation part (110) and to make the inner cavity of the heat exchange tube (300) communicate with the collection cavity; The first end (201) of the housing (200) is inserted into the connecting groove (101), and at least a portion of the heat exchange tube (300) is placed in the heat exchange chamber. The first side wall portion (120) of the connecting groove (101) and the second side wall portion (210) of the housing (200) located at the first end (201) are sealed and fixed together. An included angle α is formed at the connection between the first side wall portion (120) and the mounting portion (110), and the included angle α is greater than 90°.

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