Heat exchanger

Abstract

The utility model relates to a heat exchanger which comprises heat exchange plates and a welding layer which are arranged in a stacked mode, and the heat exchange plates comprise the first plate and the second plate. The first plate sheet comprises a first substrate, and the second plate sheet comprises a second substrate; the welding layer comprises a first welding part, the first welding part is welded to the first substrate and the second substrate, and a first inter-plate channel is formed between the first substrate and the second substrate; the heat exchanger is provided with a fluid channel and a distribution hole, and the distribution hole is located in the radial outer side of the fluid channel and communicates with the first inter-plate channel and the fluid channel. A wall forming the dispensing hole includes a portion of the first solder and a portion of the first substrate. When the wall for forming the distribution hole comprises a part of the first welding part and a part of the first substrate, the wall for forming the distribution hole comprises a part of the first welding part and a part of the first substrate, that is, the part of the second substrate located at the distribution hole is provided with the first welding part, and the part of the first substrate located at the distribution hole is not provided with the welding part, so that the circulation sectional area of the distribution hole can be increased.

Description

Technical Field

[0001] This utility model relates to the field of thermal management technology, and in particular to heat exchangers. Background Technology

[0002] When a plate heat exchanger is used as an evaporator, the refrigerant is in a two-phase state (gas and liquid) at the inlet. When the refrigerant flow rate is low, gas-liquid phase separation easily occurs, resulting in uneven refrigerant distribution within the heat exchange channels and severely reducing heat exchange performance. To solve this problem, distribution holes are usually installed at the inlet of the heat exchanger. This can significantly increase the refrigerant flow rate, improve gas-liquid mixing, and thus optimize the distribution of the refrigerant within the heat exchange channels. Utility Model Content

[0003] In related technologies, the distribution hole is formed by welding two adjacent plates. The applicant has found that during welding, due to the small size of the distribution hole, it is easily affected by the solder flow, causing solder to accumulate at the distribution hole, resulting in a significant reduction in the hole diameter after welding. Consequently, the refrigerant flow rate in the heat exchange channel corresponding to the distribution hole also decreases significantly. Therefore, it is necessary to provide a heat exchanger that addresses the above problems by increasing the flow cross-sectional area of ​​the distribution hole.

[0004] On the one hand, the technical solution adopted by this utility model is as follows:

[0005] A heat exchanger includes stacked heat exchange plates and a welded layer, wherein the heat exchange plates include a first plate and a second plate;

[0006] The first plate includes a first substrate, and the second plate includes a second substrate; the welding layer includes a first welding portion, which is welded to the first substrate and the second substrate respectively, and a first inter-plate channel is provided between the first substrate and the second substrate;

[0007] The heat exchanger has a fluid channel and a distribution hole, the distribution hole being located radially outside the fluid channel and communicating with the first interplate channel and the fluid channel;

[0008] The wall forming the distribution hole includes a portion of the first weld portion and a portion of the first substrate; or, the wall forming the distribution hole includes a portion of the first weld portion and a portion of the second substrate.

[0009] When the wall forming the distribution hole includes a portion of the first welding part and a portion of the first substrate, the first substrate and the second substrate are welded together through the first welding part. That is, the portion of the second substrate located at the distribution hole has the first welding part, while the portion of the first substrate located at the distribution hole does not have a welding part. This increases the flow cross-sectional area of ​​the distribution hole. Alternatively, when the wall forming the distribution hole includes a portion of the first welding part and a portion of the second substrate, the first substrate and the second substrate are welded together through the first welding part. That is, the portion of the second substrate located at the distribution hole does not have a welding part, while the portion of the first substrate located at the distribution hole has the first welding part. This increases the flow cross-sectional area of ​​the distribution hole.

[0010] On the other hand, the technical solution adopted by this utility model is as follows:

[0011] A heat exchanger includes stacked heat exchange plates and a welded layer, wherein the heat exchange plates include a first plate and a second plate;

[0012] The welding layer includes a first welding portion, the first plate includes a first substrate and the first welding portion, and the first substrate and the first welding portion are welded together; the welding layer further includes a fourth welding portion, the second plate includes a second substrate and the fourth welding portion, and the second substrate and the fourth welding portion are welded together; at least a portion of the first welding portion is welded to at least a portion of the fourth welding portion, and a first inter-plate channel is provided between the first substrate and the second substrate;

[0013] The heat exchanger has a fluid channel and a distribution hole, the distribution hole being located radially outside the fluid channel and communicating with the first interplate channel and the fluid channel;

[0014] The wall forming the distribution hole includes a portion of the first welded portion and a portion of the fourth welded portion; the thickness of the first welded portion is D1, and the thickness of the fourth welded portion is D2, where D1 and D2 satisfy the following relationship: 0 < D1 ≤ 0.4D2; or, 0 < D2 ≤ 0.4D1.

[0015] When the wall forming the distribution hole includes a portion of a first weld portion and a portion of a fourth weld portion, and D1 and D2 satisfy the following relationship: 0 < D1 ≤ 0.4D2, that is, the second substrate has a first weld portion at the location of the distribution hole, and the first substrate has a fourth weld portion at the location of the distribution hole. Since the thickness D1 of the first weld portion is small, the flow cross-sectional area of ​​the distribution hole can be increased. When the wall forming the distribution hole includes a portion of a first weld portion and a portion of a fourth weld portion, and D1 and D2 satisfy the following relationship: 0 < D2 ≤ 0.4D1, that is, the second substrate has a first weld portion at the location of the distribution hole, and the first substrate has a fourth weld portion at the location of the distribution hole. Since the thickness D2 of the fourth weld portion is small, the flow cross-sectional area of ​​the distribution hole can be increased. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the heat exchanger of this utility model;

[0017] Figure 2 for Figure 1 A schematic diagram of the structure after multiple first plates and multiple second plates are stacked;

[0018] Figure 3 for Figure 2 A cross-sectional view along the AA direction;

[0019] Figure 4 for Figure 2 Another structural diagram from a different perspective;

[0020] Figure 5 for Figure 4 An explosion diagram;

[0021] Figure 6 for Figure 1 A schematic diagram of the structure of the first plate in the middle;

[0022] Figure 7 for Figure 4 A cross-sectional view along the BB direction;

[0023] Figure 8 for Figure 7 Enlarged view of point A in the middle;

[0024] Figure 9 for Figure 4 A cross-sectional schematic diagram of the first embodiment along the CC direction.

[0025] Figure 10 for Figure 9 Enlarged diagram of point B in the middle.

[0026] Figure 11 for Figure 4A schematic diagram of the structure of the second embodiment after the first and second plates in the first inter-plate channel are welded together;

[0027] Figure 12 for Figure 4 A schematic diagram of the third embodiment after the first and second plates in the first inter-plate channel are welded together;

[0028] Figure 13 for Figure 4 A schematic diagram of the fourth embodiment after the first and second plates in the first inter-plate channel are welded together;

[0029] Figure 14 for Figure 7 A schematic diagram of the second embodiment after the first and second plates in the second inter-plate channel are welded together;

[0030] Figure 15 for Figure 7 A schematic diagram of the third embodiment after the first and second plates in the second inter-plate channel are welded together.

[0031] Reference numerals: 1. Heat exchanger; 2. Cover plate; 3. Heat exchange core; 4. Base plate; 5. Fluid channel; 6. First inter-plate channel; 7. Second inter-plate channel; 8. Fluid inlet; 9. Welding layer; 10. First plate; 11. Second plate; 12. First substrate; 13. Second substrate; 14. First welded part; 15. Distribution hole; 16. Protrusion; 17. Heat exchange zone; 18. First protrusion; 19. Second protrusion; 20. First base; 21. Second welded part; 22. Third welded part; 23. Top wall; 24. Side wall; 25. Chamfer; 26. Drainage groove; 27. First corner hole; 28. Heat exchange area; 29. ​​Fourth welded part; 30. Opening. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit its scope.

[0033] Example 1:

[0034] This embodiment discloses a heat exchanger 1, such as Figures 1-8As shown, the device includes a cover plate 2, a heat exchange core 3, and a base plate 4. The heat exchange core 3 is disposed between the cover plate 2 and the base plate 4. The heat exchange core 3 has fluid channels 5. The heat exchange core 3 is provided with multiple first inter-plate channels 6 and multiple second inter-plate channels 7. The first inter-plate channels 6 and the second inter-plate channels 7 are isolated from each other and are arranged alternately. The fluid channels 5 connect two adjacent first inter-plate channels 6. Fluid enters the first inter-plate channel 6 through the fluid inlet 8 and the fluid channels 5. The first fluid in the first inter-plate channel 6 and the second fluid in the second inter-plate channel 7 exchange heat through the plate walls.

[0035] like Figure 2 , Figure 3 , Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, the heat exchange core 3 includes stacked heat exchange plates and a welding layer 9. The heat exchange plates include a first plate 10 and a second plate 11. The first plate 10 includes a first substrate 12, and the second plate 11 includes a second substrate 13. The welding layer 9 includes a first welding portion 14, which is welded to the first substrate 12 and the second substrate 13, thereby achieving the welding of the first plate 10 and the second plate 11. A first inter-plate channel 6 is provided between the first substrate 12 and the second substrate 13. The heat exchanger 1 has a fluid channel 5 and a distribution hole 15. The distribution hole 15 is located radially outside the fluid channel 5 and connects the first inter-plate channel 6 and the fluid channel 5. The wall forming the distribution hole 15 includes a portion of the first welding portion 14 and a portion of the first substrate 12; or, the wall forming the distribution hole 15 includes a portion of the first welding portion 14 and a portion of the second substrate 13. Figure 3 and Figure 10 As shown, when the wall forming the distribution hole 15 includes a portion of the first welding portion 14 and a portion of the first substrate 12, the first substrate 12 and the second substrate 13 are welded together through the first welding portion 14. The wall forming the distribution hole 15 includes a portion of the first welding portion 14 and a portion of the first substrate 12; that is, the portion of the second substrate 13 located in the distribution hole 15 has the first welding portion 14, while the portion of the first substrate 12 located in the distribution hole 15 does not have a welding portion. This increases the flow cross-sectional area of ​​the distribution hole 15. Figure 2 and Figure 11 As shown, when the wall forming the distribution hole 15 includes a portion of the first welding portion 14 and a portion of the second substrate 13, the first substrate 12 and the second substrate 13 are welded together through the first welding portion 14. The wall forming the distribution hole 15 includes a portion of the first welding portion 14 and a portion of the second substrate 13. That is, the portion of the second substrate 13 located in the distribution hole 15 has no welding portion, while the portion of the first substrate 12 located in the distribution hole 15 has the first welding portion 14. In this way, the flow cross-sectional area of ​​the distribution hole 15 can be increased.

[0036] In this embodiment, as Figures 1-5 As shown, the first substrate 12 has at least two protrusions 16 protruding toward the second substrate 13. The at least two protrusions 16 are located radially outside the fluid channel 5. The first welding portion 14 welds the protrusions 16 to the second substrate 13 respectively. A distribution hole 15 is provided between two adjacent protrusions 16. In this way, after the fluid enters the fluid channel 5, it enters the first inter-plate channel 6 through the distribution hole 15, thereby realizing the distribution of fluid in the first inter-plate channel 6.

[0037] More detailed, such as Figures 2-5 As shown, the heat exchanger 1 also has a heat exchange zone 17; at least two protrusions 16 include a first protrusion 18 and a second protrusion 19; both the first protrusion 18 and the second protrusion 19 extend circumferentially along the fluid channel 5; along the circumferential direction of the fluid channel 5, a distribution hole 15 is provided between the first protrusion 18 and the second protrusion 19, and the opening 36 of the distribution hole 15 faces the heat exchange zone 17. Thus, with the opening 36 of the distribution hole 15 facing the heat exchange zone 17, more fluid in the fluid channel 5 can flow towards the heat exchange zone 17, thereby improving the heat exchange performance of the heat exchanger 1.

[0038] like Figure 2 and Figure 10 As shown, the first substrate 12 also has a first base 20, and the protrusion 16 protrudes toward the second substrate 13 relative to the first base 20; the wall forming the distribution hole 15 includes a portion of the first solder portion 14 and a portion of the first base 20. It should be noted that the first solder portion 14 is formed by soldering a first composite layer, and the first composite layer is composed of solder (i.e., flux); the wall forming the distribution hole 15 includes a portion of the first solder portion 14 and a portion of the first base 20, that is, before soldering, the first composite layer is located on the second substrate 14, and the protrusion 16 of the first substrate 12 has no composite layer. In this way, the flow of solder along the protrusion 16 toward the second substrate 14 and the resulting solder accumulation can be reduced.

[0039] Along the stacking direction of the heat exchange plates, the second inter-plate channel 7 is spaced apart from the first inter-plate channel 6. Within the second inter-plate channel 7, there are no particular restrictions on the welding method of the first substrate 12 and the second substrate 13, as long as welding of the first substrate 12 and the second substrate 13 can be achieved. Details are as follows:

[0040] In the first implementation, such as Figure 2 , Figure 7 and Figure 8As shown, the welding layer 9 further includes a second welding portion 21, which is located in the second inter-plate channel 7 and is welded to the first substrate 12 and the second substrate 13 respectively. The wall forming the second inter-plate channel 7 includes at least a portion of the second welding portion 21 and at least a portion of the first substrate 12. Thus, in the second inter-plate channel 7, the second substrate 13 has the second welding portion 21, while the first substrate 12 has no welding portion, and the first substrate 12 and the second substrate 13 are welded together through the second welding portion 21.

[0041] In the second implementation, such as Figure 2 , Figure 7 and Figure 14 As shown, the welding layer 9 also includes a third welding portion 22, which is located in the second inter-plate channel 7 and is welded to the first substrate 12 and the second substrate 13 respectively; the wall forming the second inter-plate channel 7 includes at least a portion of the third welding portion 22 and at least a portion of the second substrate 13; thus, in the second inter-plate channel 7, the second substrate 13 has no welding portion, the first substrate 12 has the third welding portion 22, and the first substrate 12 and the second substrate 13 are welded through the third welding portion 22.

[0042] In the third implementation, such as Figure 2 , Figure 7 and Figure 15 As shown, the welding layer 9 further includes a second welding portion 21 and a third welding portion 22, which are located in the second inter-plate channel 7. The second welding portion 21 is welded to the second substrate 13, and the third welding portion 22 is welded to the first substrate 12. The second welding portion 21 and the third welding portion 22 are welded together. The wall forming the second inter-plate channel 7 includes at least a portion of the second welding portion 21 and at least a portion of the third welding portion 22. Thus, in the second inter-plate channel 7, the second substrate 13 has the second welding portion 21, the first substrate 12 has the third welding portion 22, and the first substrate 12 and the second substrate 13 are welded together through the third welding portion 22.

[0043] In this embodiment, as Figure 2 and Figure 10 As shown, the protrusion 16 has a top wall portion 23 and a side wall portion 24. The wall forming the dispensing hole 15 includes at least a portion of the side wall portion 24. The connection between the top wall portion 23 and the side wall portion 24 has a chamfer 25. A flow channel 26 is provided between the chamfer 25 and the second substrate 13, and the flow channel 26 communicates with the dispensing hole 15. During soldering, the flow channel 26 can promote the flow of solder toward the gap between the first substrate 12 and the second substrate 13.

[0044] The processing method of heat exchanger 1, exemplarily, includes:

[0045] First, a first plate 10 and a second plate 11 are provided. The first plate 10 has a first corner hole 27 and at least two protrusions 16. The at least two protrusions 16 are located radially outside the first corner hole 27 and are spaced apart circumferentially along the first corner hole 27. The second plate 11 has a first composite layer on the side near the protrusions 16. The first composite layer includes flux. The side of the first plate 10 with the protrusions 16 does not have a composite layer.

[0046] Then, the second plate 11 is stacked between adjacent first plates 10, and the first composite layer of the second plate 11 is bonded to the second plate 11;

[0047] Next, the first plate 10 and the second plate 11 are welded together. After welding, a first interplate channel 6 is formed between the first plate 10 with the protrusion 16 on one side and the second plate 11, and a second interplate channel 7 is formed between the other side of the first plate 10 and the second plate 11. A plurality of first corner holes 27 of the first plate 10 and a plurality of second corner holes of the second plate 11 are alternately arranged along the stacking direction of the heat exchange plates and form fluid channels 5. A distribution hole 15 is formed between two adjacent protrusions 16, and the distribution hole 15 connects the first interplate channel 6 and the fluid channels 5.

[0048] The second plate 11 is provided with a first composite layer, which includes flux. The first plate 10 has no composite layer. The second plate 11 is stacked between adjacent first plates 10, and the first plates 10 and the second plates 11 are welded. The first composite layer of the second plate 11 connects the first plates 10 and the second plates 11 during welding. After welding, the first composite layer forms a first welded part 14. Since only the second plate 11 has a composite layer and the first plate 10 does not, the solder accumulation can be reduced, thereby improving the dimensional stability of the distribution hole 15 during the welding process.

[0049] In this embodiment, the first plate 10 has a heat exchange region 28; at least two protrusions 16 include a first protrusion 18 and a second protrusion 19; both the first protrusion 18 and the second protrusion 19 extend circumferentially along the first corner hole 27; along the circumferential direction of the first corner hole 27, there is a gap between the first protrusion 18 and the second protrusion 19, and the gap is close to the heat exchange region 28; after the first plate 10 and the second plate 11 are welded, a distribution hole 15 is formed between the first protrusion 18 and the second protrusion 19, and the opening 36 of the distribution hole 15 faces the heat exchange region 28. After the fluid enters the fluid channel 5, it enters the first inter-plate channel 6 through the distribution hole 15, thereby realizing the distribution of fluid in the first inter-plate channel 6; the opening 36 of the distribution hole 15 faces the heat exchange region 28, which can make more fluid in the fluid channel 5 flow towards the heat exchange region 17, thereby improving the heat exchange performance of the heat exchanger 1.

[0050] Within the second inter-plate channel 7, the welding of the first plate 10 and the second plate 11 can be achieved in various ways. For example, the second plate 11 may have a third composite layer, and the first plate 10 and the second plate 11 may be welded through the third composite layer; or, the first plate 10 may have a fourth composite layer, and the first plate 10 and the second plate 11 may be welded through the fourth composite layer; or, the first plate 10 may have a fourth composite layer, the second plate 11 may have a third composite layer, and the third composite layer and the fourth composite layer may be welded together, thereby achieving the welding of the first plate 10 and the second plate 11. The specific details are as follows:

[0051] In the first implementation, such as Figure 2 , Figure 7 and Figure 8 As shown, the first plate 10 includes a first substrate 12; the second plate 11 includes a second substrate 13, and the second plate 11 also has a third composite layer, the third composite layer and the first composite layer are located on opposite sides of the second substrate 13; thus, the third composite layer and the first substrate 12 are welded to form a second welded part 21, and the side of the second plate 11 with the third composite layer forms a second inter-plate channel 7 with the first plate 10.

[0052] In the second implementation, such as Figure 2 , Figure 7 Hehe Figure 14 As shown, the first plate 10 includes a first substrate 12, and the first plate 10 has a fourth composite layer. The fourth composite layer and the protrusion 16 are located on opposite sides of the first substrate 12. The second plate 11 includes a second substrate 13. Thus, the fourth composite layer is welded to the second substrate 13 to form a third welded portion 22, and the side of the first plate 10 with the fourth composite layer forms a second inter-plate channel 7 with the second plate 11.

[0053] In the third implementation, such as Figure 2 , Figure 7 and Figure 15 As shown, the first plate 10 includes a first substrate 12 and a fourth composite layer. The fourth composite layer and the protrusion 16 are located on opposite sides of the first substrate 12. The second plate 11 includes a second substrate 13 and a third composite layer. The third composite layer and the first composite layer are located on opposite sides of the second substrate 13. Thus, after the first plate 10 and the second plate 11 are welded, the third composite layer forms a second welded portion 21, the fourth composite layer forms a third welded portion 22, and the side of the second plate 11 with the third composite layer forms a second inter-plate channel 7 with the first plate 10.

[0054] Example 2: The main difference from Example 1 lies in the welding structure and processing method within the first inter-plate channel 6, as detailed below:

[0055] like Figure 2, Figure 12 and Figure 13 As shown, the heat exchanger 1 includes stacked heat exchange plates and a welding layer 9. The heat exchange plates include a first plate 10 and a second plate 11. The welding layer 9 includes a first welding portion 14. The first plate 10 includes a first substrate 12 and the first welding portion 14, which are welded together. The welding layer 9 also includes a fourth welding portion 29. The second plate 11 includes a second substrate 13 and the fourth welding portion 29, which are welded together. At least a portion of the first welding portion 14 is welded to at least a portion of the fourth welding portion 29. A first inter-plate channel 6 is provided between the first substrate 12 and the second substrate 13; the heat exchanger 1 has a fluid channel 5 and a distribution hole 15, the distribution hole 15 is located radially outside the fluid channel 5 and the distribution hole 15 connects the first inter-plate channel 6 and the fluid channel 5; the wall forming the distribution hole 15 includes a portion of a first weld portion 14 and a portion of a fourth weld portion 29; the thickness of the first weld portion 14 is D1 and the thickness of the fourth weld portion 29 is D2, D1 and D2 satisfy the following relationship: 0 < D1 ≤ 0.4D2; or, 0 < D2 ≤ 0.4D1. When the wall forming the distribution hole 15 includes a portion of the first weld portion 14 and a portion of the fourth weld portion 29, and D1 and D2 satisfy the following relationship: 0 < D1 ≤ 0.4D2, that is, the second substrate 13 has the first weld portion 14 at the location of the distribution hole 15, and the first substrate 12 has the fourth weld portion 29 at the location of the distribution hole 15. Since the thickness D1 of the first weld portion 14 is small, the flow cross-sectional area of ​​the distribution hole 15 can be increased. When the wall forming the distribution hole 15 includes a portion of the first weld portion 14 and a portion of the fourth weld portion 29, and D1 and D2 satisfy the following relationship: 0 < D2 ≤ 0.4D1, that is, the second substrate 13 has the first weld portion 14 at the location of the distribution hole 15, and the first substrate 12 has the fourth weld portion 29 at the location of the distribution hole 15. Since the thickness D2 of the fourth weld portion 29 is small, the flow cross-sectional area of ​​the distribution hole 15 can be increased.

[0056] The processing method of heat exchanger 1, exemplarily, includes:

[0057] First, a first plate 10 and a second plate 11 are provided. The first plate 10 has a first corner hole 27 and at least two protrusions 16. The at least two protrusions 16 are located radially outside the first corner hole 27 and are spaced apart circumferentially along the first corner hole 27. A second composite layer is provided on the side of the first plate 10 with the protrusions 16, and the second composite layer includes flux. A first composite layer is provided on the side of the second plate 11 near the protrusions 16, and the first composite layer includes flux. The thickness of the first composite layer is D1, and the thickness of the second composite layer is D2. D1 and D2 satisfy the following relationship: 0 < D1 ≤ 0.4D2; or, 0 < D2 ≤ 0.4D1.

[0058] Then, the second plate 11 is stacked between adjacent first plates 10, and the second composite layer of the first plate 10 is bonded to the first composite layer of the second plate 11.

[0059] Next, the first plate 10 and the second plate 11 are welded. After welding, a first interplate channel 6 is formed between the first plate 10 with the protrusion 16 on one side and the second plate 11, and a second interplate channel 7 is formed between the other side of the first plate 10 and the second plate 11; a plurality of first corner holes 27 of the first plate 10 and a plurality of second corner holes of the second plate 11 are alternately arranged along the stacking direction of the heat exchange plates and form fluid channels 5; a distribution hole 15 is formed between two adjacent protrusions 16, and the distribution hole 15 connects the first interplate channel 6 and the fluid channels 5.

[0060] The second plate 11 is provided with a first composite layer, which includes flux. The first plate 10 is provided with a second composite layer, which also includes flux. The second plate 11 is stacked between adjacent first plates 10. The first plates 10 and the second plates 11 are welded together. The first composite layer of the second plate 11 and the second composite layer of the first plate 10 connect the first plates 10 and the second plate 11 during welding. After welding, the first composite layer forms a first welded part 14, and the second composite layer forms a fourth welded part 29. At least a portion of the first welded part 14 is welded to at least a portion of the fourth welded part 29. Since the thicknesses D1 and D2 of the first composite layer satisfy the following relationship: 0 < D1 ≤ 0.4D2; or 0 < D2 ≤ 0.4D1, solder accumulation can be reduced, thereby improving the dimensional stability of the distribution hole 15 during the welding process. It should be noted that the first composite layer forms the first welded part after welding, and the thickness of the first welded part and the thickness of the first composite layer may be the same or different; the same applies to the second composite layer and the second welded part, the third composite layer and the third welded part, and the fourth composite layer and the fourth welded part.

[0061] In this embodiment, the first plate 10 has a heat exchange region 28; at least two protrusions 16 include a first protrusion 18 and a second protrusion 19; both the first protrusion 18 and the second protrusion 19 extend circumferentially along the first corner hole 27; along the circumferential direction of the first corner hole 27, there is a gap between the first protrusion 18 and the second protrusion 19, the gap being close to the heat exchange region 28; a distribution hole 15 is formed between the first protrusion 18 and the second protrusion 19, the distribution hole 15 being close to the heat exchange region 28; a first interplate channel 6 is formed between the first plate 10 and the second plate 11, the distribution hole 15 connecting the fluid channel 5 and the first interplate channel 6. After the fluid enters the fluid channel 5, it enters the first interplate channel 6 through the distribution hole 15, thereby realizing the distribution of fluid in the first interplate channel 6; the opening 36 of the distribution hole 15 faces the heat exchange region 28, which allows more fluid in the fluid channel 5 to flow towards the heat exchange region 17, thereby improving the heat exchange performance of the heat exchanger 1.

[0062] The above-described embodiments are merely examples of several implementations of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications without departing from the concept of this utility model, and these modifications all fall within the protection scope of this utility model.

Claims

1. A heat exchanger, characterized in that, It includes stacked heat exchange plates and a welding layer (9), wherein the heat exchange plates include a first plate (10) and a second plate (11); The first plate (10) includes a first substrate (12), and the second plate (11) includes a second substrate (13); the welding layer (9) includes a first welding portion (14), which is welded to the first substrate (12) and the second substrate (13) respectively, and a first inter-plate channel (6) is provided between the first substrate (12) and the second substrate (13). The heat exchanger (1) has a fluid channel (5) and a distribution hole (15), the distribution hole (15) being located radially outside the fluid channel (5) and the distribution hole (15) connecting the first interplate channel (6) and the fluid channel (5); The wall forming the distribution hole (15) includes a portion of the first welding portion (14) and a portion of the first substrate (12); or, the wall forming the distribution hole (15) includes a portion of the first welding portion (14) and a portion of the second substrate (13).

2. The heat exchanger according to claim 1, characterized in that, The first substrate (12) has at least two protrusions (16) protruding toward the second substrate (13), the at least two protrusions (16) being located radially outside the fluid channel (5), the first welding part (14) welding the protrusions (16) to the second substrate (13) respectively; the distribution hole (15) is provided between two adjacent protrusions (16).

3. The heat exchanger according to claim 2, characterized in that, The heat exchanger (1) also has a heat exchange zone (17); at least two of the protrusions (16) include a first protrusion (18) and a second protrusion (19); the first protrusion (18) and the second protrusion (19) both extend circumferentially along the fluid channel (5); Along the circumferential direction of the fluid channel (5), there is a distribution hole (15) between the first protrusion (18) and the second protrusion (19), and the opening (36) of the distribution hole (15) faces the heat exchange zone (17).

4. The heat exchanger according to claim 2 or 3, characterized in that, The first substrate (12) further has a first base (20), and the protrusion (16) protrudes toward the second substrate (13) relative to the first base (20); the wall forming the distribution hole (15) includes a portion of the first welding portion (14) and a portion of the first base (20).

5. The heat exchanger according to claim 4, characterized in that, The heat exchanger (1) further includes at least one second inter-plate channel (7), which is spaced apart from the first inter-plate channel (6) along the stacking direction of the heat exchange plates; The welding layer (9) further includes a second welding portion (21), which is located in the second inter-plate channel (7) and is welded to the first substrate (12) and the second substrate (13) respectively; the wall forming the second inter-plate channel (7) includes at least a portion of the second welding portion (21) and at least a portion of the first substrate (12); Alternatively, the welding layer (9) may further include a third welding portion (22) located in the second inter-plate channel (7) and welded to the first substrate (12) and the second substrate (13) respectively; the wall forming the second inter-plate channel (7) includes at least a portion of the third welding portion (22) and at least a portion of the second substrate (13); Alternatively, the welding layer (9) may further include a second welding portion (21) and a third welding portion (22), the second welding portion (21) and the third welding portion (22) being located in the second inter-board channel (7); the second welding portion (21) is welded to the second substrate (13), the third welding portion (22) is welded to the first substrate (12), and the second welding portion (21) and the third welding portion (22) are welded; the wall forming the second inter-board channel (7) includes at least a portion of the second welding portion (21) and at least a portion of the third welding portion (22).

6. The heat exchanger according to any one of claims 2 to 5, characterized in that, The protrusion (16) has a top wall (23) and a side wall (24). The wall forming the distribution hole (15) includes at least a portion of the side wall (24). The connection between the top wall (23) and the side wall (24) has a chamfer (25). A drainage groove (26) is provided between the chamfer (25) and the second substrate (13). The drainage groove (26) communicates with the distribution hole (15).

7. A heat exchanger, characterized in that, It includes stacked heat exchange plates and a welding layer (9), wherein the heat exchange plates include a first plate (10) and a second plate (11); The welding layer (9) includes a first welding portion (14), the first plate (10) includes a first substrate (12) and the first welding portion (14), the first substrate (12) and the first welding portion (14) are welded; the welding layer (9) also includes a fourth welding portion (29), the second plate (11) includes a second substrate (13) and the fourth welding portion (29), the second substrate (13) and the fourth welding portion (29) are welded; at least a portion of the first welding portion (14) is welded to at least a portion of the fourth welding portion (29), and a first inter-plate channel (6) is provided between the first substrate (12) and the second substrate (13); The heat exchanger (1) has a fluid channel (5) and a distribution hole (15), the distribution hole (15) being located radially outside the fluid channel (5) and the distribution hole (15) connecting the first interplate channel (6) and the fluid channel (5); The wall forming the distribution hole (15) includes a portion of the first welded portion (14) and a portion of the fourth welded portion (29); the thickness of the first welded portion (14) is D1, and the thickness of the fourth welded portion (29) is D2, and D1 and D2 satisfy the following relationship: 0 < D1 ≤ 0.4D2; or, 0 < D2 ≤ 0.4D1.

8. The heat exchanger according to claim 7, characterized in that, The first substrate (12) has at least two protrusions (16) protruding toward the second substrate (13), and the at least two protrusions (16) are located radially outside the fluid channel (5); the dispensing hole (15) is between two adjacent protrusions (16).

9. The heat exchanger according to claim 8, characterized in that, The heat exchanger (1) also has a heat exchange zone (17); at least two of the protrusions (16) include a first protrusion (18) and a second protrusion (19); the first protrusion (18) and the second protrusion (19) both extend circumferentially along the fluid channel (5); Along the circumferential direction of the fluid channel (5), there is a distribution hole (15) between the first protrusion (18) and the second protrusion (19), and the opening (36) of the distribution hole (15) faces the heat exchange zone (17).

10. The heat exchanger according to claim 8 or 9, characterized in that, The heat exchanger (1) further includes at least one second inter-plate channel (7), which is spaced apart from the first inter-plate channel (6) along the stacking direction of the heat exchange plates; The welding layer (9) further includes a second welding portion (21), which is located in the second inter-plate channel (7) and is welded to the first substrate (12) and the second substrate (13) respectively; the wall forming the second inter-plate channel (7) includes at least a portion of the second welding portion (21) and at least a portion of the first substrate (12); Alternatively, the welding layer (9) may further include a third welding portion (22) located in the second inter-plate channel (7) and welded to the first substrate (12) and the second substrate (13) respectively; the wall forming the second inter-plate channel (7) includes at least a portion of the third welding portion (22) and at least a portion of the second substrate (13); Alternatively, the welding layer (9) may further include a second welding portion (21) and a third welding portion (22), the second welding portion (21) and the third welding portion (22) being located in the second inter-board channel (7); the second welding portion (21) is welded to the second substrate (13), the third welding portion (22) is welded to the first substrate (12), and the second welding portion (21) and the third welding portion (22) are welded; the wall forming the second inter-board channel (7) includes at least a portion of the second welding portion (21) and at least a portion of the third welding portion (22).

11. The heat exchanger according to claim 10, characterized in that, The protrusion (16) has a top wall (23) and a side wall (24). The wall forming the distribution hole (15) includes at least a portion of the side wall (24). The connection between the top wall (23) and the side wall (24) has a chamfer (25). A drainage groove (26) is provided between the chamfer (25) and the second substrate (13). The drainage groove (26) communicates with the distribution hole (15).

Images