Heat Exchanger

Abstract

A heat exchanger comprises a heat exchange tube, a first end assembly and a second end assembly. The first end assembly comprises a first flow plate, a first header assembly and an end plate. The first header assembly comprises a first mounting portion and a first protrusion and a second protrusion integrally formed with the first mounting portion. The first protrusion and the second protrusion extend along the length direction of the first flow plate and are arranged side by side along the width direction of the first flow plate. The end plate and the first mounting portion are fixedly connected to the first flow plate. The first flow plate is provided with a first flow groove connected to the corresponding heat exchange tube. Compared with the related art, the present application strengthens the strength of the first header assembly by integrally forming the first mounting portion, the first protrusion and the second protrusion, so that the first protrusion and the second protrusion can play the role of reinforcing ribs.

Description

Technical Field

[0001] The present application relates to a heat exchanger, and belongs to the technical field of heat exchange. Background Art

[0002] The relevant heat exchanger includes a current collecting assembly and a heat exchange tube connected to the current collecting assembly. The current collecting assembly includes two current collecting tubes arranged side by side, one of which is a refrigerant inlet pipe and the other is a refrigerant outlet pipe. The two current collecting tubes are fixed by welding, and the strength of the entire current collecting assembly is low. Summary of the invention

[0003] The purpose of the present application is to provide a heat exchanger with a high strength current collecting assembly.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical solution: a heat exchanger, comprising a heat exchange tube, a first end assembly and a second end assembly, wherein both ends of the heat exchange tube are fixedly connected to the first end assembly and the second end assembly respectively and are sealed at the connection.

[0005] The first end assembly includes a first flow plate, a first header assembly and an end plate, the first flow plate includes a first wall surface and a second wall surface that are arranged opposite to each other; the first header assembly includes a first mounting portion, a first protrusion that is integrally formed with the first mounting portion, and a second protrusion that is integrally formed with the first mounting portion, one side of the first mounting portion is fixedly connected to the first wall surface, the first protrusion and the second protrusion are formed on the other side opposite to the first mounting portion, the first protrusion and the second protrusion extend along the length direction of the first flow plate and are arranged side by side along the width direction of the first flow plate, the first protrusion is provided with a first flow port and a first channel that is connected to the first flow port, and the second protrusion is provided with a second flow port and a second channel that is connected to the second flow port;

[0006] The end plate is fixedly connected to a portion of the first wall surface; the first circulation plate is provided with a first circulation groove connected to the corresponding heat exchange tube, the first circulation groove passes through the first wall surface and the second wall surface, the end of the heat exchange tube is penetrated from one side of the second wall surface and arranged in the first circulation groove, and the tube wall of the heat exchange tube is sealed with the groove wall of the first circulation groove; the first mounting portion is also provided with a first through hole and a second through hole corresponding to the first circulation groove, wherein the first channel is connected to the corresponding first circulation groove through the first through hole, and the second channel is connected to the corresponding first circulation groove through the second through hole.

[0007] In the present application, the first mounting portion, the first protrusion portion and the second protrusion portion are integrally formed, and the first protrusion portion and the second protrusion portion can function as reinforcing ribs, thereby enhancing the strength of the first collecting pipe assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a three-dimensional schematic diagram of the heat exchanger of the present application in one embodiment.

[0009] Figure 2 yes Figure 1 A three-dimensional diagram from another angle.

[0010] Figure 3 yes Figure 1 main view.

[0011] Figure 4 yes Figure 1 Top view of the .

[0012] Figure 5 yes Figure 1 Partial exploded view of the .

[0013] Figure 6 yes Figure 5 Further exploded view.

[0014] Figure 7 yes Figure 6 Further exploded view.

[0015] Figure 8 yes Figure 7 A top view of the first flow plate in FIG.

[0016] Fig. 9 yes Figure 7 Further exploded view.

[0017] Fig.10 yes Fig. 9 Further exploded view.

[0018] Fig.11 yes Fig.10 Exploded three-dimensional image from another angle.

[0019] Fig.12 is along Figure 4 Cross-sectional view along line AA.

[0020] Fig.13 yes Fig.12 A partial enlarged view of the middle frame portion C.

[0021] Fig.14 yes Fig.12 A partial enlarged view of part D in the middle picture.

[0022] Fig.15 is along Figure 1 Schematic diagram of the three-dimensional cross-section of the BB line.

[0023] Fig.16 yes Fig.15 A partial enlarged view of the middle frame portion E.

[0024] Fig.17 yes Fig.15 A partial enlarged view of the circled portion F.

[0025] Fig.18 yes Fig.11 A top view of the first manifold assembly.

[0026] Fig.19 yes Fig.10 A top view of the second header assembly.

[0027] Fig. 20 is a top view of the first flow plate in another embodiment.

[0028] Fig.21 is a cross-sectional schematic diagram of a second header assembly in another embodiment.

[0029] Fig. 22 is a cross-sectional schematic diagram of a second header assembly in yet another embodiment. DETAILED DESCRIPTION

[0030] Please refer to Figures 1 to 17 As shown, the present application discloses a heat exchanger, which includes a plurality of heat exchange tubes 30, a first end assembly 10 and a second end assembly 20, wherein the two ends of the heat exchange tube 30 are respectively fixedly connected to the first end assembly 10 and the second end assembly 20 and sealed at the connection. In the embodiment shown in the present application, the one end is the top end and the other end is the bottom end.

[0031] In the embodiment shown in the figure of the present application, the heat exchanger is a four-pass heat exchanger. Figure 1 As shown, the plurality of heat exchange tubes 30 include a first heat exchange region heat exchange tube 301, a second heat exchange region heat exchange tube 302, a third heat exchange region heat exchange tube 303 and a fourth heat exchange region heat exchange tube 304. Wave-shaped fins (not shown) are also provided between the heat exchange tubes 30 in each heat exchange region to enhance heat exchange performance.

[0032] Please refer to Figures 5 to 9As shown, in the embodiment illustrated in the present application, the first end assembly 10 includes a first positioning plate 1, a first flow plate 2 fixedly connected to the first positioning plate 1, a first header assembly 3 fixedly connected to a portion of the first flow plate 2, and an end plate 4 fixedly connected to another portion of the first flow plate 2. The first header assembly 3 is integrally formed with the end plate 4 or fixedly connected, that is, the first header assembly 3 and the end plate 4 are one integrally formed part or two parts fixedly connected together.

[0033] Please refer to Fig. 9 and Fig.14 As shown, in the embodiment shown in the figure of the present application, the first positioning plate 1 is provided with a plurality of first positioning grooves 11 for positioning the top end of the heat exchange tube 30, and these first positioning grooves 11 are respectively used for the top 305 of the heat exchange tube 30 to pass through, so as to realize the positioning of the heat exchange tube 30. In one embodiment of the present application, the first positioning plate 1 is formed by stamping a metal plate.

[0034] Please refer to Figure 5 , Fig.13 and Fig.16 As shown, the first collecting tube assembly 3 includes a first mounting portion 33, a first protrusion 31 integrally formed with the first mounting portion 33, and a second protrusion 32 integrally formed with the first mounting portion 33. One side of the first mounting portion 33 is fixedly connected to the first circulation plate 2. The first protrusion 31 and the second protrusion 32 are formed on the other side opposite to the first mounting portion 33. The first protrusion 31 and the second protrusion 32 extend along the length direction LL of the first circulation plate 2 and are arranged side by side along the width direction WW of the first circulation plate 2. The first protrusion 31 is provided with a first circulation port 310 and a first channel 311 connected to the first circulation port 310; the second protrusion 32 is provided with a second circulation port 320 and a second channel 321 connected to the second circulation port 320. In the embodiment illustrated in the present application, the first channel 311 is a refrigerant inlet channel, and the second channel 321 is a refrigerant outlet channel. Please refer to Figure 5As shown, in the embodiment illustrated in the present application, one end of the first protrusion 31 close to the first circulation port 310 is connected to the refrigerant inlet adapter seat 312 for the refrigerant to flow in; one end of the first protrusion 31 away from the first circulation port 310 is sealed by a first blocking cap 313; one end of the second protrusion 32 close to the second circulation port 320 is connected to the refrigerant outlet adapter seat 322 for the refrigerant to flow out; one end of the second protrusion 32 away from the second circulation port 320 is sealed by a second blocking cap 323. A brazing composite layer may be provided on the inner wall of the refrigerant inlet adapter seat 312 and the refrigerant outlet adapter seat 322, so as to facilitate the positioning brazing thereof with the connecting pipe or the pressure plate, and no auxiliary welding parts such as welding sheets are required, and the structure is simple and reliable. Of course, in other embodiments, the first protrusion 31 and the second protrusion 32 may also be directly inserted into the connecting pipe or the pressure plate, and positioned and brazed. Please refer to Figure 3 As shown, the first protrusion 31 and the second protrusion 32 protrude from the end plate 4 along the extension direction of the heat exchange tube 30 (i.e., the height direction HH of the heat exchanger), thereby forming a recessed area 40 on one side of the end plate 4, reducing the volume and weight of the heat exchanger.

[0035] Please refer to Figure 7 As shown, the first circulation plate 2 includes a first wall 2011 and a second wall 2012 that are arranged opposite to each other, and a first circulation groove that penetrates the first wall 2011 and the second wall 2012. In one embodiment of the present application, the first circulation plate 2 is formed by stamping a metal plate. The first circulation groove is connected to the corresponding heat exchange tube 30. The first protrusion 31 and the second protrusion 32 are connected to the corresponding heat exchange tube 30 through the corresponding first circulation groove. The end of the heat exchange tube 30 is penetrated by the side where the second wall 2012 is located in the first circulation groove. The tube wall of the heat exchange tube 30 is sealed with the groove wall of the first circulation groove. Please refer to Figure 8 As shown, the first circulation groove includes a plurality of first grooves 21 arranged at intervals along the first protrusion 31, a plurality of second grooves 22 arranged at intervals along the extension direction of the first protrusion 31, a plurality of third grooves 23 arranged at intervals along the extension direction of the second protrusion 32, and a plurality of fourth grooves 24 arranged at intervals along the second protrusion 32, wherein the second grooves 22 and the fourth grooves 24 correspond to the end plate 4, the first grooves 21 and the fourth grooves 24 aligned with each other along the width direction WW of the first circulation plate 2 are separated from each other, and the second grooves 22 and the third grooves 23 aligned with each other along the width direction WW of the first circulation plate 2 are connected to each other.

[0036] In the embodiment illustrated in the present application, the first mounting portion 33, the first protrusion 31 and the second protrusion 32 are integrally formed, thereby reducing the risk of leakage between the various parts of the first header assembly 3, and facilitating the assembly of the heat exchanger. In addition, the first protrusion 31 and the second protrusion 32 can act as reinforcing ribs, thereby strengthening the strength of the first header assembly 3. In one embodiment of the present application, the first mounting portion 33, the first protrusion 31 and the second protrusion 32 can be formed by profiles, or can be formed by a sheet forming process, and the first mounting portion 33, the first protrusion 31 and the second protrusion 32 are all completed by machining.

[0037] like Fig.11 As shown, the first mounting portion 33 is further provided with a first through hole 331 and a second through hole 332 corresponding to the first circulation slot, wherein the first channel 311 is connected to the corresponding first circulation slot through the first through hole 331, and the second channel 321 is connected to the corresponding first circulation slot through the second through hole 332. Fig.18 As shown, the size of the first perforation 331 is smaller than the size of the second perforation 332, wherein the slightly smaller first perforation 331 facilitates the refrigerant to be sprayed into the heat exchange tube 30 in the first process, and the slightly larger second perforation 332 facilitates the refrigerant to enter the refrigerant outlet channel in the fourth process, thereby reducing the flow resistance of the refrigerant. For example, when the heat exchanger is used as an evaporator, the first channel 311 serves as an inlet channel, and the refrigerant entering the first process is liquid, and the slightly smaller hole facilitates the refrigerant to be sprayed into the flat tube hole, and the refrigerant enters the second channel 321 in the fourth process, which serves as the outlet channel, and the slightly larger hole facilitates the refrigerant to enter the outlet channel, thereby reducing the flow resistance of the refrigerant.

[0038] like Figure 8 , Fig.11 , Fig.13 and Fig.16 As shown, in one embodiment of the present application, the first groove 21 corresponds to the first perforation 331 one by one, and the fourth groove 24 corresponds to the second perforation 332 one by one, wherein the first channel 311 is connected to the first groove 21 through the first perforation 331, and the second channel 321 is connected to the fourth groove 24 through the second perforation 332.

[0039] Please refer to Figure 8As shown, in one embodiment of the present application, the first slot 21 and the fourth slot 24 are both H-shaped, which include first vertical slots 211, 241, second vertical slots 212, 242 parallel to the first vertical slots 211, 241, and distribution slots 213, 243 connecting the first vertical slots 211, 241 and the second vertical slots 212, 242. The distribution slots 213, 243 form a connecting area of ​​two heat exchange tubes 30 located in the same first circulation slot, thereby increasing the circulation space of the refrigerant, reducing the flow resistance of the refrigerant, and facilitating a more uniform distribution of the refrigerant. The first circulation plate 2 includes a connecting slot 25 connecting the corresponding second slot 22 and the third slot 23. In the embodiment illustrated in the present application, the width of the connecting slot 25 is narrower than the width of the second slot 22 and the width of the third slot 23.

[0040] The first through hole 331 is connected to the distribution groove 213 of the corresponding first slot 21 , the second through hole 332 is connected to the distribution groove 243 of the corresponding fourth slot 24 , and the first vertical slots 211 , 241 and the second vertical slots 212 , 242 are connected to the heat exchange tube 30 .

[0041] In one embodiment of the present application, a first positioning structure for mutual positioning is provided between the first positioning plate 1 and the first circulation plate 2; and / or a second positioning structure for mutual positioning is provided between the first circulation plate 2 and the first mounting portion 33. By providing the positioning structure, assembly is facilitated, so that the first end assembly 10 is conveniently formed into a whole by welding (e.g., brazing). The first positioning structure includes a first protrusion provided on the first positioning plate 1 and a first groove provided on the first circulation plate 2; or the first positioning structure includes a first groove provided on the first positioning plate 1 and a first protrusion provided on the first circulation plate 2; the first protrusion cooperates with the first groove. Similarly, the second positioning structure includes a second protrusion provided on the first circulation plate 2 and a second groove provided on the first mounting portion 33; or the second positioning structure includes a second groove provided on the first circulation plate 2 and a second protrusion provided on the first mounting portion 33; the second protrusion cooperates with the second groove. In one embodiment of the present application, the first positioning plate 1, the first circulation plate 2 and the first mounting portion 33 can be tightly fitted by a riveting process; at this time, the first protrusion and the second protrusion are riveted by a mold to form a riveted convex point, and the first groove and the second groove are punched out by a mold or machined.

[0042] Please refer to Fig.13 and Fig.14As shown, in one embodiment of the present application, the top 305 of the heat exchange tube 30 passes through the first positioning plate 1 and only partially extends into the first circulation plate 2. The circulation of the refrigerant (such as CO2 refrigerant) is achieved by using a plurality of first circulation grooves arranged in the thickness direction of the first circulation plate 2. Fig.14 As shown, the end plate 4 is in a flat plate shape, and the top 305 of the heat exchange tube 30 is not in contact with the end plate 4 to form an internal flow channel.

[0043] In the embodiment shown in the figure of the present application, the first end assembly 10 is connected to the top end of the heat exchange tube 30, and the second end assembly 20 is connected to the bottom end of the heat exchange tube 30. Fig.10 and Fig.11 As shown, the second end assembly 20 includes a second positioning plate 5, a second flow plate 6 fixedly connected to the second positioning plate 5, and a second header assembly 7 fixedly connected to the second flow plate 6. The structure of the second positioning plate 5 is the same as that of the first positioning plate 1.

[0044] Please refer to Fig.10 As shown, the second circulation plate 6 includes a third wall 6011 and a fourth wall 6012 that are arranged opposite to each other, and a second circulation groove that penetrates the third wall 6011 and the fourth wall 6012. The second circulation groove is connected to the corresponding heat exchange tube 30. Fig.10 and Fig.11 As shown, the shape of the second flow groove is the same as that of the first slot 21, that is, both are H-shaped. Fig. 20 As shown, in another embodiment of the second circulation plate 6, the second circulation grooves located in the same row are interconnected, thereby further reducing the flow resistance of the refrigerant.

[0045] like Fig.10 and Fig.19 As shown, in one embodiment of the present application, the second header assembly 7 includes a second mounting portion 70, a third protrusion 73 and a fourth protrusion 74. One side of the second mounting portion 70 is fixedly connected to the fourth wall 6012, and the third protrusion 73 and the fourth protrusion 74 extend along the length direction of the second flow plate 6 and are arranged side by side along the width direction of the second flow plate 6. Fig.10As shown, in one embodiment of the present application, the second mounting portion 70, the third protrusion 73 and the fourth protrusion 74 are integrally formed, which reduces the risk of leakage between the parts of the second header assembly 7 and facilitates the assembly of the heat exchanger. In addition, the third protrusion 73 and the fourth protrusion 74 can act as reinforcing ribs, thereby strengthening the strength of the second header assembly 7. The third protrusion 73 is provided with a third channel 731, and the fourth protrusion 74 is provided with a fourth channel 741. The end of the heat exchange tube 30 is penetrated from the side where the fourth wall 6012 is located and arranged in the second circulation groove, so that the corresponding first circulation groove and the second circulation groove are interconnected; the second circulation groove is interconnected with the corresponding third channel 731 and the corresponding fourth channel 741.

[0046] For details, please refer to Fig.19 As shown, the second mounting portion 70 is provided with a first connecting hole 701 corresponding to the heat exchange tube 301 of the first heat exchange area, a second connecting hole 702 corresponding to the heat exchange tube 302 of the second heat exchange area, a third connecting hole 703 corresponding to the heat exchange tube 303 of the third heat exchange area, and a fourth connecting hole 704 corresponding to the heat exchange tube 304 of the fourth heat exchange area. The first connecting hole 701 and the second connecting hole 702 are connected to the third channel 731, and the third connecting hole 703 and the fourth connecting hole 704 are connected to the fourth channel 741. The principle of setting the size of the connecting hole is that when the refrigerant enters the heat exchange tube 30 from the channel, the connecting hole is slightly smaller, and when the refrigerant enters the channel from the heat exchange tube 30, the connecting hole is slightly larger. The advantage of this design is that when the connecting hole is slightly smaller, the refrigerant is sprayed into the heat exchange tube 30, which is conducive to the uniform distribution of the refrigerant; when the connecting hole is slightly larger, it is conducive to the refrigerant to converge into the channel, reducing the refrigerant flow resistance. According to the above principle, in the embodiment illustrated in the present application, the size of the first communication hole 701 is larger than the size of the second communication hole 702 ; the size of the third communication hole 703 is larger than the size of the fourth communication hole 704 .

[0047] Please refer to Fig.21 As shown, in another embodiment, the second header assembly 7 may not be provided with the second mounting portion 70; in this case, the second header assembly 7 may be formed by stamping a metal sheet. The third channel 731 and the fourth channel 741 are along the length direction of the second flow plate 6 and pass through both ends of the metal sheet. In this case, an additional plugging cap is required to block both ends of the third channel 731 and the fourth channel 741. The second header assembly 7 may be formed by pressing a sheet or by processing a profile, which is convenient for processing.

[0048] Please refer to Fig. 22As shown, in another embodiment, the third channel 731 and the fourth channel 741 may not penetrate both ends of the metal plate along the length direction of the second flow plate 6. In this case, no additional plugging cap is required. The second header assembly 7 can be formed by pressing a plate, which is easy to process.

[0049] In the embodiment illustrated in the present application, the top end 305 of the heat exchange tube 301 in the first heat exchange region is connected to the first channel 311 through the first groove 21 and the first perforation 331, and the bottom end 306 of the heat exchange tube 301 in the first heat exchange region is connected to the third channel 731; the bottom end 306 of the heat exchange tube 302 in the second heat exchange region is connected to the third channel 731, and the top end 305 of the heat exchange tube 302 in the second heat exchange region is connected to the second groove 22; the top end 305 of the heat exchange tube 303 in the third heat exchange region is connected to the third groove 23, and the bottom end 306 of the heat exchange tube 303 in the third heat exchange region is connected to the fourth channel 741; the bottom end 306 of the heat exchange tube 304 in the fourth heat exchange region is connected to the fourth channel 741, and the top end 305 of the heat exchange tube 304 in the fourth heat exchange region is connected to the second channel 321 through the fourth groove 24 and the second perforation 332.

[0050] The working principle of the heat exchanger in this application is as follows:

[0051] First, the refrigerant enters the first channel 311 from the first flow port 310;

[0052] First process: the refrigerant entering the first channel 311 flows downward from the first through hole 331 to the distribution groove 213, and further diffuses to both sides to the first vertical groove 211 and the second vertical groove 212, and then flows downward through the first heat exchange region heat exchange tube 301 to reach the third channel 731;

[0053] Second process: the refrigerant flows from right to left in the third channel 731 and flows upward through the heat exchange tube 302 in the second heat exchange region to reach the second slot 22;

[0054] The third process: the refrigerant flows from the second slot 22 to the third slot 23, and flows downward through the heat exchange tube 303 of the third heat exchange region to reach the fourth channel 741;

[0055] Fourth process: the refrigerant flows from left to right in the fourth channel 741, and flows upward through the heat exchange tube 304 of the fourth heat exchange region to reach the first vertical groove 241 and the second vertical groove 242, and then converges to the middle to the distribution groove 243, and further flows upward;

[0056] Finally, the refrigerant enters the second channel 321 from the second through hole 332 and flows out of the heat exchanger from the second flow port 320 .

[0057] In the embodiment illustrated in the present application, by designing the first protrusion 31 and the second protrusion 32 of the first collecting pipe assembly 3 and the third protrusion 73 and the fourth protrusion 74 of the second collecting pipe assembly 7 as arc convex hulls, the flow resistance can be significantly reduced during the conversion flow of the refrigerant from the first flow to the second flow and from the third flow to the fourth flow.

[0058] The heat exchanger of the embodiment of the present application can withstand high pressure while greatly reducing machining costs and is easy to assemble.

[0059] The above embodiments are only used to illustrate the present application but not to limit the technical solutions described in the present application. The understanding of this specification should be based on the technical personnel in the relevant technical field. For example, for the description of directions such as "left", "right", "up", and "down", although this specification has described the present application in detail with reference to the above embodiments, ordinary technical personnel in the field should understand that technical personnel in the relevant technical field can still modify or make equivalent substitutions to the present application, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present application should be included in the scope of the claims of the present application.

Claims

1. A heat exchanger, comprising a heat exchange tube (30), a first end assembly (10) and a second end assembly (20), wherein two ends of the heat exchange tube (30) are respectively fixedly connected to the first end assembly (10) and the second end assembly (20) and sealed at the connection, characterized in that: The first end assembly (10) comprises a first flow plate (2), a first header assembly (3) and an end plate (4); the first flow plate (2) comprises a first wall surface (2011) and a second wall surface (2012) arranged opposite to each other; the first header assembly (3) comprises a first mounting portion (33), a first protruding portion (31) integrally formed with the first mounting portion (33), and a second protruding portion (32) integrally formed with the first mounting portion (33); one side of the first mounting portion (33) is fixedly connected to the first wall surface (2011); the first protruding portion (31) is integrally formed with the first mounting portion (33); The first protrusion (31) and the second protrusion (32) are formed on the other side opposite to the first mounting portion (33), the first protrusion (31) and the second protrusion (32) extend along the length direction of the first circulation plate (2) and are arranged side by side along the width direction of the first circulation plate (2), the first protrusion (31) is provided with a first circulation port (310) and a first channel (311) communicating with the first circulation port (310), and the second protrusion (32) is provided with a second circulation port (320) and a second channel (321) communicating with the second circulation port (320); The end plate (4) is fixedly connected to a portion of the first wall surface (2011); the first circulation plate (2) is provided with a first circulation groove connected to the corresponding heat exchange tube (30), the first circulation groove penetrates the first wall surface (2011) and the second wall surface (2012), the end of the heat exchange tube (30) is penetrated from one side of the second wall surface (2012) and arranged in the first circulation groove, and the tube wall of the heat exchange tube (30) is sealed with the groove wall of the first circulation groove; the first mounting portion (33) is further provided with a first through hole (331) and a second through hole (332) arranged corresponding to the first circulation groove, wherein the first channel (311) is connected to the corresponding first circulation groove through the first through hole (331), and the second channel (321) is connected to the corresponding first circulation groove through the second through hole (332); The first protrusion (31) and the second protrusion (32) protrude from the end plate (4) along the height direction (HH) of the heat exchanger, forming a recessed area (40) on one side of the end plate (4).

2. The heat exchanger according to claim 1, characterized in that: The first header assembly (3) and the end plate (4) are integrally formed or fixedly connected.

3. The heat exchanger according to claim 1, characterized in that: The first circulation groove comprises a plurality of first grooves (21) arranged along the first protrusion (31), a plurality of second grooves (22) arranged along the extension direction of the first protrusion (31), a plurality of third grooves (23) arranged along the extension direction of the second protrusion (32), and a plurality of fourth grooves (24) arranged along the second protrusion (32), the second grooves (22) and the fourth grooves (24) corresponding to the end plate (4), the first grooves (21) and the fourth grooves (24) are separated from each other along the width direction of the first circulation plate (2), and the second grooves (22) and the third grooves (23) are connected to each other along the width direction of the first circulation plate (2).

4. The heat exchanger according to claim 3, characterized in that: The first slot (21) and the fourth slot (24) are aligned with each other along the width direction of the first circulation plate (2), and the second slot (22) and the third slot (23) are aligned with each other along the width direction of the first circulation plate (2); the first slot (21) and the first through-hole (331) correspond one-to-one, and the fourth slot (24) and the second through-hole (332) correspond one-to-one, wherein the first channel (311) and the first slot (21) are connected through the first through-hole (331), and the second channel (321) and the fourth slot (24) are connected through the second through-hole (332).

5. The heat exchanger according to claim 3, characterized in that: The first slot (21) and the fourth slot (24) are both H-shaped, and include a first vertical slot (211, 241), a second vertical slot (212, 242) parallel to the first vertical slot (211, 241), and a distribution slot (213, 243) connecting the first vertical slot (211, 241) and the second vertical slot (212, 242); the first through hole (331) is connected to the distribution slot (213) of the corresponding first slot (21); the second through hole (332) is connected to the distribution slot (243) of the corresponding fourth slot (24); the first vertical slot (211, 241) and the second vertical slot (212, 242) are connected to one end of the heat exchange tube (30).

6. The heat exchanger according to claim 3, characterized in that: The first circulation plate (2) comprises a connecting groove (25) connecting the corresponding second groove (22) and the third groove (23), and the width of the connecting groove (25) is narrower than the width of the second groove (22) and the width of the third groove (23).

7. The heat exchanger according to claim 1, characterized in that: The first end assembly (10) comprises a first positioning plate (1) for positioning one end of the heat exchange tube (30), the first positioning plate (1) being provided with a plurality of first positioning grooves (11) for inserting one end of the heat exchange tube (30), and the second wall surface (2012) of the first circulation plate (2) being fixedly connected to the first positioning plate (1).

8. The heat exchanger according to claim 7, characterized in that: The first positioning plate (1) and the first circulation plate (2) are provided with a first positioning structure for positioning each other; and / or The first circulation plate (2) and the first mounting portion (33) are provided with a second positioning structure for positioning each other.

9. The heat exchanger according to claim 3, characterized in that: The second end assembly (20) comprises a second positioning plate (5) for positioning the heat exchange tube (30), a second flow plate (6) fixedly connected to the second positioning plate (5), and a second header assembly (7) fixedly connected to the second flow plate (6), the second flow plate (6) comprising a third wall surface (6011) and a fourth wall surface (6012) arranged opposite to each other; the second header assembly (7) comprises a second mounting portion (70), a third protruding portion (73) and a fourth protruding portion (74), one side of the second mounting portion (70) is fixedly connected to the third wall surface (6011), the third protruding portion (73) and the fourth protruding portion (74) are arranged along the length of the second flow plate (6). The third protrusion (73) and the fourth protrusion (74) are arranged side by side along the width direction of the second circulation plate (6); the third protrusion (73) is provided with a third channel (731), and the fourth protrusion (74) is provided with a fourth channel (741); the second circulation plate (6) is provided with a second circulation groove connected to the corresponding heat exchange tube (30), the second circulation groove passes through the third wall surface (6011) and the fourth wall surface (6012), and the end of the heat exchange tube (30) is passed through the second circulation groove from one side of the fourth wall surface (6012), so that the corresponding first circulation groove and the second circulation groove are connected to each other; the second circulation groove is connected to the corresponding third channel (731) and the corresponding fourth channel (741).

10. The heat exchanger according to claim 1, characterized in that: The first channel (311) is a refrigerant inlet channel, the second channel (321) is a refrigerant outlet channel, and the size of the first through hole (331) is smaller than the size of the second through hole (332).

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