Heat exchanger

Abstract

The heat exchanger comprises a heat exchange core body, and the heat exchange core body is provided with a plurality of first inter-plate channels and a plurality of second inter-plate channels; the hole wall forming the fluid inlet is defined as a first hole wall, and the hole wall forming the fluid through hole is defined as a second hole wall; the first hole wall is provided with a first end part; the second hole wall is provided with a second end part and a third end part; in the axial direction of the fluid channel, the distance between the second end, close to the fluid inlet, of the second hole wall and the first end of the first hole wall is H1; according to every two adjacent fluid through holes, the distance between the third end, close to the fluid inlet, of the second hole wall and the second end, away from the fluid inlet, of the second hole wall is H2; h1 and H2 meet the following relation: H1 is less than H2. Due to the fact that H1 is smaller than H2, when fluid enters the heat exchange core from the fluid inlet, the fluid flow of the fluid entering the first inter-plate channel located at the top end is smaller than the fluid flow of the first inter-plate channel located in the heat exchange core, and the fluid in the channels can fully exchange heat.

Description

Technical Field

[0001] This invention relates to the field of thermal management technology, and more specifically, to heat exchangers. Background Technology

[0002] Plate heat exchangers typically consist of multiple plates stacked together, with interplate channels formed between adjacent plates for fluid flow. Two fluids can flow on opposite sides of the plates to achieve heat exchange between the plates.

[0003] In a heat exchanger, the flow channels for the two fluids are arranged alternately. Each flow channel located inside the heat exchanger has flow channels for the other fluid on both sides. In the actual heat exchange process, heat exchange occurs on both sides. However, for the same fluid, the flow rate of the outermost flow channel is similar to that of the innermost flow channel. But because the fluid in the outermost flow channel only exchanges heat with the fluid in the other fluid's flow channel on its inner side, its heat exchange capacity is smaller. Therefore, at the same flow rate, the fluid in the outermost flow channel does not receive sufficient heat exchange, thus reducing the heat exchange performance of the heat exchanger. Summary of the Invention

[0004] The present invention provides a heat exchanger with high heat exchange performance.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a heat exchanger, comprising a heat exchange core having a fluid channel, the fluid channel including a fluid inlet and a plurality of fluid through holes; the heat exchange core having a plurality of first inter-plate channels and a plurality of second inter-plate channels, the first inter-plate channels and the second inter-plate channels being isolated from each other;

[0006] The fluid through-hole connects two adjacent first plate inter-channels; the hole wall forming the fluid inlet is defined as the first hole wall, and the hole wall forming the fluid through-hole is defined as the second hole wall;

[0007] The first hole wall has a first end, which is close to the fluid passage;

[0008] The second hole wall has a second end and a third end, the second end being close to the fluid inlet and the third end being away from the fluid inlet; along the axial direction of the fluid channel, the distance between the second end of the second hole wall close to the fluid inlet and the first end of the first hole wall is H1; for two adjacent fluid through holes, the distance between the third end of the second hole wall close to the fluid inlet and the second end of the second hole wall away from the fluid inlet is H2; H1 and H2 satisfy the following relationship: H1 < H2.

[0009] According to an embodiment of the present invention, since H1 < H2, when the fluid enters the heat exchange core from the fluid inlet, the fluid flow rate entering the first inter-plate channel at the top is less than the fluid flow rate in the first inter-plate channel inside. That is, the present invention improves the heat exchange efficiency of the heat exchanger by reducing the fluid flow rate in the first inter-plate channel at the top, so that the fluid in the channel can fully exchange heat. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the heat exchanger structure;

[0011] Figure 2 This is a schematic diagram of the heat exchange core structure;

[0012] Figure 3 This is a cross-sectional view along direction AA in the figure;

[0013] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0014] Figure 5 This is a liquid flow distribution diagram for the experimental example;

[0015] Figure 6 This is a comparative diagram of liquid flow rate distribution;

[0016] Figure 7 This is an exploded view of the heat exchanger core.

[0017] Figure 8 This is a structural schematic diagram of the side plate;

[0018] Figure 9 This is a schematic diagram of the second plate.

[0019] Figure 10 This is a schematic diagram of the structure of the first plate.

[0020] Reference numerals: 1. Cover plate; 2. Heat exchange core; 3. Base plate; 4. Fluid channel; 5. Fluid inlet; 6. Fluid through hole; 7. First inter-plate channel; 8. Second inter-plate channel; 9. First plate; 10. Second plate; 11. Base plate portion of the first plate; 12. Base plate portion of the second plate; 13. Protrusion; 14. Fluid outlet; 15. Side plate inlet corner hole; 16. Side plate outlet corner hole; 17. Side plate recess; 18. Side plate inlet corner hole; 19. Side plate outlet corner hole; 20. First inlet corner hole; 21. First outlet corner hole; 22. Second inlet corner hole; 23. Second outlet corner hole; 24. First protrusion; 25. First recess; 26. First inlet corner hole; 27. First outlet corner hole; 28. Second inlet corner hole; 29. ​​Second outlet corner hole; 30. Third inlet corner hole; 31. Third outlet corner hole; 32. Fourth inlet corner hole; 33. Fourth outlet corner hole; 34. Second recess; 35. Second protrusion; 36. Third inlet corner hole; 37. Third outlet corner hole; 38. Fourth inlet corner hole; 39. Fourth outlet corner hole; 40. Distribution area; 41. Heat exchange area; 42. First inlet pipe; 43. First outlet pipe; 44. First inlet channel; 45. First outlet channel; 46. Second inlet pipe; 47. Second outlet pipe; 48. Second inlet channel; 49. Second outlet channel; 50. First hole wall; 51. Second hole wall; 52. First end; 53. Second end; 54. Third end; 55. First sub-plate channel; 56. Second sub-plate channel. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Specific implementation schemes are as follows:

[0022] This embodiment discloses a heat exchanger, such as Figures 1-4 As shown, the device includes a cover plate 1, a heat exchange core 2, and a base plate 3. The heat exchange core 2 is disposed between the cover plate 1 and the base plate 3. The heat exchange core 2 has a fluid channel 4, which includes a fluid inlet 5 and multiple fluid through holes 6. The heat exchange core 2 is provided with multiple first inter-plate channels 7 and multiple second inter-plate channels 8. The first inter-plate channels 7 and the second inter-plate channels 8 are isolated from each other and are arranged alternately. The fluid through holes 6 connect two adjacent first inter-plate channels 7. Fluid enters the first inter-plate channel 7 through the fluid inlet 5 and the fluid channel 4. The fluid in the first inter-plate channel 7 exchanges heat with the fluid in the second inter-plate channel 8 through the plate wall.

[0023] In some embodiments, the first inter-plate channel 7 near the fluid inlet 5 is defined as the first sub-inter-plate channel 55, and the first inter-plate channel 7 located inside the heat exchanger is defined as the second sub-inter-plate channel 56; the flow cross-sectional area of ​​the first sub-inter-plate channel 55 is smaller than the flow cross-sectional area of ​​the second sub-inter-plate channel 56. Thus, the fluid flow rate of the first sub-inter-plate channel 55 is less than the fluid flow rate of the second sub-inter-plate channel 56 located inside, thereby enabling the fluid within the channel to undergo sufficient heat exchange, thereby improving the heat exchange efficiency of the heat exchanger.

[0024] In other embodiments, the wall forming the fluid inlet 5 is defined as the first wall 50, and the wall forming the fluid through-hole 6 is defined as the second wall 51. The first wall 50 has a first end 52, which is close to the fluid through-hole 6. The second wall 51 has a second end 53 and a third end 54, where the second end 53 is close to the fluid inlet 5 and the third end 54 is away from the fluid inlet 5. Along the axial direction of the fluid channel 4, the distance between the second end 53 of the second wall 51 close to the fluid inlet 5 and the first end 52 of the first wall 50 is H1. For two adjacent fluid through-holes 6, the distance between the third end 54 of the second wall 51 close to the fluid inlet 5 and the second end 53 of the second wall 51 away from the fluid inlet 5 is H2. H1 and H2 satisfy the following relationship: H1 < H2. With this configuration, when fluid enters the heat exchange core 2 from the fluid inlet 5, the fluid flow rate entering the first inter-plate channel 7 at the top is less than the fluid flow rate in the first inter-plate channel 7 located inside, allowing the fluid in the channel to fully exchange heat, thereby improving the heat exchange efficiency of the heat exchanger.

[0025] like Figure 3 and Figure 4 As shown, in some embodiments, the heat exchange core 2 includes multiple plates, which are alternately stacked to form multiple isolated and alternately arranged first inter-plate channels 7 and multiple second inter-plate channels 8. The plates forming the first inter-plate channels 7 include first plates 9 and second plates 10. Along the axial direction of the fluid channel 4, the distance between the base plate portion 11 of the first plate and the base plate portion 12 of the second plate is defined as the inter-plate distance. The inter-plate distance H3 of the first inter-plate channel 7 at the top and the inter-plate distance H4 of the first inter-plate channel 7 in the middle satisfy the following relationship: H3 < H4. In this way, the volume of the first inter-plate channel 7 at the top is smaller than the volume of the first inter-plate channel 7 in the middle, so that the fluid flow rate in the first inter-plate channel 7 at the top is smaller than the fluid flow rate in the first inter-plate channel 7 in the middle. The fluid in the first inter-plate channel 7 at the top can fully exchange heat, thereby improving the heat exchange performance of the heat exchanger.

[0026] Furthermore, such as Figure 4As shown, the first plate 9 with fluid inlet 5 is defined as a side plate. The side plate is provided with a protrusion 13. The hole wall forming the fluid inlet 5 includes the protrusion 13, and the protrusion 13 extends toward the first inter-plate channel 7 relative to the base plate portion 11 of the first plate. The distance between the end of the protrusion 13 near the first inter-plate channel 7 and the second end 53 of the second hole wall 51 adjacent to the fluid inlet 5 is H1. Thus, when the fluid enters the heat exchange core 2 from the fluid inlet 5, the flow rate of the fluid entering the first inter-plate channel 7 at the top is reduced due to the flow obstruction effect of the protrusion 13, making it less than the flow rate of the first inter-plate channel 7 inside, thereby achieving a better heat exchange effect.

[0027] To verify the changes in flow distribution between boards, this invention designed experimental examples and comparative examples, as detailed below:

[0028] Experimental example: The fluid inlet 5 of the side plate is oval, and the flow area of ​​the fluid inlet 5 is 99 mm². 2 The flow area of ​​fluid through-hole 6 is 99 mm². 2 The inter-plate distance between the first inter-plate channel 7 and the second inter-plate channel 8 is 1.9 mm. The distance between the end of the protrusion 13 near the first inter-plate channel 7 and the second end 53 of the second hole wall 51 adjacent to the fluid inlet 5 is 1.2 mm. The distance between the third end 54 of the second hole wall 51 near the fluid inlet 5 and the second end 53 of the second hole wall 51 away from the fluid inlet 5 of two adjacent fluid through holes 6 is 3.0 mm. Based on the above structural parameters of the heat exchange core, this application conducted computational fluid dynamics experiments. The experimental results show that the liquid flow distribution of the first to 12 inter-plate channels is as follows: Figure 5 As shown; where the horizontal axis 12 represents the first inter-plate channel 7 at the top, and the horizontal axes 1 to 11 represent the first inter-plate channels 7 inside; the vertical axis represents the percentage of liquid flow in each inter-plate channel relative to the total flow.

[0029] Comparative Example: The only difference from the experimental example is that the orifice wall forming fluid inlet 5 does not have the protrusion 13 structure. The liquid flow distribution in the channel between plates 1 and 12 is as follows. Figure 6 As shown.

[0030] Comparison shows that the liquid flow rates of the first to 12th channels in the comparative example are basically the same, while the liquid flow rate of the 12th channel in the experimental example is significantly lower than that of the 12th channel in the comparative example. Therefore, by providing a protrusion 13 on the orifice wall forming the fluid inlet 5, the flow rate of fluid entering the first inter-plate channel 7 at the top can be reduced, making it less than the flow rate of the other first inter-plate channels 7 inside.

[0031] In this embodiment, the first orifice wall 50 forming the fluid inlet 5 and the protrusion 13 can be separate structures, such as the protrusion 13 being fixed to the first orifice wall 50 forming the fluid inlet 5 by welding; Figure 4 As shown, in order to simplify the manufacturing process and reduce production costs, the first hole wall 50 forming the fluid inlet 5 and the protrusion 13 can also be an integral structure, such as the first hole wall 50 forming the fluid inlet 5 being turned inward to form the protrusion 13. As for the cross-sectional structure of the protrusion 13 in the axial direction of the fluid channel 4, there are no particular restrictions, as long as it can achieve the function of flow obstruction. As some embodiments, the longitudinal cross-section of the protrusion 13 has a curvature; or, the longitudinal cross-section of the protrusion 13 is a straight line.

[0032] Preferably, H1 and H2 satisfy the following relationship: H1 = (0.5~0.8) × H2. In this way, the fluid flow rate of the first interplate channel 7 at the top can be approximately equal to 1 / 2 of the fluid flow rate of the first interplate channel 7 inside, thereby improving the heat exchange performance of the heat exchanger.

[0033] Definition: The side of the plate facing the cover plate 11 is the first plate surface, and the other side of the plate is the second plate surface.

[0034] like Figures 7-8 As shown, exemplarily, the side plate has a fluid inlet 5 and a fluid outlet 14, which are arranged diagonally. Fluid enters the first inter-plate channel 7 of the heat exchange core 2 from the fluid inlet 5 and flows out from the fluid outlet 14. Additionally, the side plate includes a side plate inlet corner hole 15 and a side plate outlet corner hole 16 recessed into the first plate surface, and multiple side plate recesses 17 recessed into the first plate surface. These recesses 17 are arranged in parallel rows, with each row of recesses 17 interlacing with the others. Furthermore, the side plate inlet corner hole 15 has a side plate inlet corner hole 18, and the side plate outlet corner hole 16 has a side plate outlet corner hole 19. Fluid enters the second inter-plate channel 8 of the heat exchange core 2 through the side plate inlet corner hole 18. The fluid in the second inter-plate channel 8 exchanges heat with the fluid in the first inter-plate channel 7 through the plate walls and finally flows out from the side plate outlet corner hole 19.

[0035] like Figure 9As shown, exemplarily, the second plate 10 includes a first inlet corner hole 20 and a first outlet corner hole 21 recessed in the first plate surface of the second plate 10, a second inlet corner hole 22 and a second outlet corner hole 23 protruding from the first plate surface of the first plate 9, a plurality of first protrusions 24 protruding from the first plate surface of the first plate 9, and a plurality of first recesses 25 recessed in the first plate surface of the first plate 9. The first inlet corner hole 20 has a first inlet corner hole 26, the first outlet corner hole 21 has a first outlet corner hole 27, the second inlet corner hole 22 has a second inlet corner hole 28, and the second outlet corner hole 23 has a second outlet corner hole 29. As some embodiments, the first inlet corner hole 20 and the first outlet corner hole 21 are arranged diagonally, and the second inlet corner hole 22 and the second outlet corner hole 23 are also arranged diagonally. The plurality of first protrusions 24 and the plurality of first recesses 25 are arranged in a matrix and are alternately arranged along the transverse and longitudinal directions of the first plate 9. As some embodiments, a plurality of first protrusions 24 and a plurality of first recesses 25 are provided between the first inlet corner hole portion 20 and the second outlet corner hole portion 23, and a plurality of first protrusions 24 and a plurality of first recesses 25 are provided between the first outlet corner hole portion 21 and the second inlet corner hole portion 22.

[0036] like Figure 10 As shown, exemplarily, the first plate 9 located inside the heat exchange core 2 includes a third inlet corner hole 30 and a third outlet corner hole 31 protruding from the first plate surface of the first plate 9, a fourth inlet corner hole 32 and a fourth outlet corner hole 33 recessed from the first plate surface of the first plate 9, a plurality of second recesses 34 recessed from the first plate surface of the first plate 9, and a plurality of second protrusions 35 protruding from the first plate surface of the first plate 9. The third inlet corner hole 30 has a third inlet corner hole 36, the third outlet corner hole 31 has a third outlet corner hole 37, the fourth inlet corner hole 32 has a fourth inlet corner hole 38, and the fourth outlet corner hole 33 has a fourth outlet corner hole 39. As some embodiments, the third inlet corner hole 30 and the third outlet corner hole 31 are arranged diagonally, and the fourth inlet corner hole 32 and the fourth outlet corner hole 33 are also arranged diagonally. Multiple second protrusions 35 and multiple second recesses 34 are arranged in a matrix, and the second protrusions 35 and second recesses 34 are alternately arranged along the transverse and longitudinal directions of the first plate 9. As some embodiments, multiple second protrusions 35 and multiple second recesses 34 are provided between the third inlet corner hole 30 and the fourth outlet corner hole 33, and multiple second protrusions 35 and multiple second recesses 34 are provided between the third outlet corner hole 31 and the fourth inlet corner hole 32.

[0037] In this embodiment, a first inter-plate channel 7 is formed between the second surface of the first plate 9 and the first surface of the second plate 10, and a second inter-plate channel 8 is formed between the second surface of the second plate 10 and the first surface of the first plate 9; the assembly between the second surface of the first plate 9 (i.e., the side plate) at the top and the first surface of the second plate 10, and between the second surface of the second plate 10 and the first surface of the first plate 9, is specifically described as follows:

[0038] Assembly between the second surface of the side plate and the first surface of the second plate 10:

[0039] like Figure 7 , Figure 8 and Figure 9 As shown, exemplarily, the second surface of the side plate is disposed opposite to the first surface of the second plate 10. The first protrusion 24 of the second plate 10 contacts and is fixed to the side plate recess 17 of the side plate by welding. The side plate inlet corner hole 15 of the side plate contacts and is fixed to the second inlet corner hole 22 of the second plate 10 by welding. The side plate inlet corner hole 15 of the side plate contacts and is fixed to the second outlet corner hole 23 of the second plate 10 by welding. In this way, a first inter-plate channel 7 is formed between the second surface of the side plate and the first surface of the second plate 10. This inter-plate channel is the first inter-plate channel 7 at the top of the heat exchange core 2.

[0040] Assembly between the first plate surface of the first plate 9 and the second plate surface of the second plate 10 located inside the heat exchange core 2:

[0041] like Figure 7 , Figure 9 and Figure 10 As shown, exemplarily, the first surface of the first plate 9 and the second surface of the second plate 10 are disposed opposite each other. The second protrusion 35 of the first plate 9 contacts the first recess 25 of the second plate 10 and is fixed by welding. The third inlet corner hole 30 of the first plate 9 contacts the first inlet corner hole 20 of the second plate 10 and is fixed by welding. The third outlet corner hole 31 of the first plate 9 contacts the first outlet corner hole 21 of the second plate 10 and is fixed by welding. In this way, a second interplate channel 8 is formed between the first surface of the first plate 9 and the second surface of the second plate 10 located inside the heat exchange core 2.

[0042] Assembly between the second surface of the first plate 9 and the first surface of the second plate 10:

[0043] like Figure 7 , Figure 9 and Figure 10As shown, exemplarily, the second surface of the first plate 9 is disposed opposite to the first surface of the second plate 10. The second recess 34 of the first plate 9 contacts and is fixed to the first protrusion 24 of the second plate 10 by welding. The second inlet corner hole 22 on the second plate 10 contacts and is fixed to the fourth inlet corner hole 32 of the first plate 9 by welding. The second outlet corner hole 23 on the second plate 10 contacts and is fixed to the fourth outlet corner hole 33 of the first plate 9 by welding. In this way, a first inter-plate channel 7 is formed between the second surface of the first plate 9 and the first surface of the second plate 10. This inter-plate channel is the first inter-plate channel 7 inside the heat exchange core 2.

[0044] According to the assembly method described above, such as Figure 3 and Figure 4 As shown, multiple first plates 9 and multiple second plates 10 are assembled to form multiple isolated first inter-plate channels 7 and multiple second inter-plate channels 8, with the first inter-plate channels 7 and second inter-plate channels 8 arranged alternately. Since the third inlet corner hole 30 of the first plate 9 is welded to the first inlet corner hole 20 of the second plate 10, the third inlet corner hole 36 of the third inlet corner hole 30 and the first inlet corner hole 26 of the first inlet corner hole 20 together constitute the aforementioned fluid through hole 6. The fluid inlet 5 and the multiple fluid through holes 6 together constitute the aforementioned fluid channel 4. Preferably, the flow area of ​​the fluid inlet 5 is smaller than the flow area of ​​the fluid through hole 6 adjacent to the fluid inlet 5. This increases the fluid flow rate into the top first inter-plate channel 7, thereby allowing more fluid to flow into the other internal first inter-plate channels 7.

[0045] Preferably, the first plate 9 includes a distribution zone 40 and a heat exchange zone 41. Along the length of the plate, the length of the heat exchange zone 41 is greater than the length of the distribution zone 40. The distribution zone 40 is provided with a fluid inlet 5. A portion of the first hole wall 50 forming the fluid inlet 5 is provided with a protrusion 13, and this portion of the first hole wall 50 is close to the heat exchange zone 41. Since the length of the heat exchange zone 41 is greater than the length of the distribution zone 40, when the fluid flows in the inter-plate channel, most of the fluid will flow to the heat exchange zone 41, and only a small amount of fluid will flow into the distribution zone 40. Therefore, the portion of the first hole wall 50 near the distribution zone 40 does not need to be provided with a protrusion 13. This reduces the use of raw materials, thereby reducing production costs.

[0046] It is worth mentioning that the inter-plate channels at the bottom of the heat exchange core 2 also experience heat exchange on only one side, reducing the heat exchanger's efficiency. To solve the above technical problem, this invention improves the heat exchanger's efficiency by reducing the inter-plate distance in the inter-plate channels located at the bottom.

[0047] It should be noted that since the multiple first inter-plate channels 7 and multiple second inter-plate channels 8 of the heat exchange core 2 are arranged alternately, the inter-plate channel at the bottom of the heat exchange core 2 may be either the first inter-plate channel 7 or the second inter-plate channel 8.

[0048] like Figure 3 As shown, when the inter-plate channel at the bottom of the heat exchange core 2 is the first inter-plate channel 7, the inter-plate distance H5 of the first inter-plate channel 7 at the bottom of the heat exchange core 2 and the inter-plate distance H4 of the first inter-plate channel 7 located inside satisfy the following relationship: H5 < H4. This makes the volume of the first inter-plate channel 7 at the bottom smaller than the volume of the first inter-plate channel 7 located inside, thus making the fluid flow rate in the first inter-plate channel 7 at the bottom smaller than the fluid flow rate in the first inter-plate channel 7 located inside. This allows the fluid in the first inter-plate channel 7 to fully exchange heat, thereby further improving the heat exchange performance of the heat exchanger.

[0049] When the inter-plate channel at the bottom of the heat exchange core 2 is the second inter-plate channel 8, the inter-plate distance H6 of the second inter-plate channel 8 at the bottom of the heat exchange core 2 and the inter-plate distance H7 of the second inter-plate channel 8 located inside satisfy the following relationship: H6 < H7. This makes the volume of the second inter-plate channel 8 at the bottom smaller than the volume of the second inter-plate channel 8 located inside, thus resulting in a lower fluid flow rate in the second inter-plate channel 8 at the bottom than in the second inter-plate channel 8 located inside. This allows the fluid in the second inter-plate channel 8 to release heat sufficiently, thereby further improving the heat exchange performance of the heat exchanger.

[0050] like Figure 1 and Figure 2 As shown, exemplarily, the heat exchanger further includes a first inlet pipe 42 and a first outlet pipe 43. The first inlet pipe 42 includes a first inlet channel 44, and the first outlet pipe 43 includes a first outlet channel 45. The fluid inlet 5 connects the first inlet channel 44 and the first interplate channel 7, and the fluid outlet 14 connects the first outlet channel 45 and the first interplate channel 7. Fluid sequentially flows through the first inlet channel 44 and the fluid inlet 5 into the first interplate channel 7, and flows out from the fluid outlet 14. Preferably, the flow area of ​​the inlet of the first inlet pipe 42 is greater than or equal to the flow area of ​​the fluid inlet 5, thus ensuring that a larger amount of fluid flows into the first interplate channel 7 of the heat exchange core 2.

[0051] like Figure 1 and Figure 2As shown, exemplarily, the heat exchanger also includes a second inlet pipe 46 and a second outlet pipe 47, wherein the second inlet pipe 46 includes a second inlet channel 48, the second outlet pipe 47 includes a second outlet channel 49, the side plate inlet corner hole 18 connects the second inlet channel 48 and the inter-plate channel 8, the side plate outlet corner hole 19 connects the second outlet channel 49 and the inter-plate channel 8, and the fluid sequentially enters the second inter-plate channel 8 through the second inlet channel 48 and the side plate inlet corner hole 18, and flows out from the second outlet channel 49.

[0052] In other embodiments, applying the above-described heat exchanger to heat exchange devices such as refrigerators, condensers, or oil coolers can greatly improve heat exchange efficiency.

[0053] The technical features of the above-described technical solutions can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above-described technical solutions are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The above-described technical solutions merely illustrate several embodiments of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and controls without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A heat exchanger, characterized in that: It includes a heat exchange core (2) having a fluid channel (4), the fluid channel (4) including a fluid inlet (5) and a plurality of fluid through holes (6); the heat exchange core (2) is provided with a plurality of first inter-plate channels (7) and a plurality of second inter-plate channels (8), the first inter-plate channels (7) and the second inter-plate channels (8) being isolated from each other; The fluid through hole (6) connects two adjacent first inter-plate channels (7); the hole wall forming the fluid inlet (5) is defined as the first hole wall (50), and the hole wall forming the fluid through hole (6) is defined as the second hole wall (51); The first hole wall (50) has a first end (52) which is close to the fluid through hole (6); the second hole wall (51) has a second end (53) and a third end (54), which is close to the fluid inlet (5) and the third end (54) is far from the fluid inlet (5); along the axial direction of the fluid channel (4), the distance between the second end (53) of the second hole wall (51) close to the fluid inlet (5) and the first end (52) of the first hole wall (50) is H1; for two adjacent fluid through holes (6), the distance between the third end (54) of the second hole wall (51) close to the fluid inlet (5) and the second end (53) of the second hole wall (51) far from the fluid inlet (5) is H2; H1 and H2 satisfy the following relationship: H1 < H2.

2. The heat exchanger according to claim 1, characterized in that: The plates forming the first inter-plate channel (7) include a first plate (9) and a second plate (10). Along the axial direction of the fluid channel (4), the distance between the base plate portion (11) of the first plate and the base plate portion (12) of the second plate is defined as the inter-plate distance. The inter-plate distance H3 of the first inter-plate channel (7) located at the top and the inter-plate distance H4 of the first inter-plate channel (7) located inside satisfy the following relationship: H3 < H4.

3. The heat exchanger according to claim 1 or 2, characterized in that: The first plate (9) having the fluid inlet (5) is defined as a side plate. The side plate is provided with a protrusion (13). The hole wall forming the fluid inlet (5) includes the protrusion (13), and the protrusion (13) extends toward the first inter-plate channel (7) relative to the base plate portion (11) of the side plate. The distance between the end of the protrusion (13) near the first inter-plate channel (7) and the second end (53) of the second hole wall (51) adjacent to the fluid inlet (5) is H1.

4. The heat exchanger according to claim 3, characterized in that: H1 and H2 satisfy the following relationship: H1 = (0.5 ~ 0.8) × H2.

5. The heat exchanger according to claim 4, characterized in that: The first hole wall (50) and the protrusion (13) are integrally formed; or, the first hole wall (50) and the protrusion (13) are welded and fixed.

6. The heat exchanger according to claim 4 or 5, characterized in that: The first plate (9) includes a distribution area (40) and a heat exchange area (41). The distribution area (40) is provided with the fluid inlet (5). A portion of the first hole wall (50) forming the fluid inlet (5) is provided with the protrusion (13), and the portion of the first hole wall (50) is close to the heat exchange area (41).

7. The heat exchanger according to any one of claims 1 to 2 and 4 to 5, characterized in that: The flow area of ​​the fluid inlet (5) is smaller than the flow area of ​​the fluid through hole (6) adjacent to the fluid inlet (5).

8. The heat exchanger according to claim 7, characterized in that: The plate-to-plate channel at the bottom of the heat exchange core (2) is the first plate-to-plate channel (7); the plate-to-plate distance H5 of the first plate-to-plate channel (7) at the bottom of the heat exchange core (2) and the plate-to-plate distance H4 of the first plate-to-plate channel (7) inside satisfy the following relationship: H5 < H4.

9. The heat exchanger according to claim 7, characterized in that: The inter-plate channel at the bottom end of the heat exchange core (2) is the second inter-plate channel (8). The inter-plate distance H6 of the second inter-plate channel (8) at the bottom end of the heat exchange core (2) and the inter-plate distance H7 of the second inter-plate channel (8) inside satisfy the following relationship: H6 < H7.

10. The heat exchanger according to claim 8 or 9, characterized in that: The heat exchanger also includes a first inlet pipe (42), which is connected to the fluid inlet (5), and the flow area of ​​the inlet of the first inlet pipe (42) is greater than or equal to the flow area of ​​the fluid inlet (5).

11. A heat exchanger, characterized in that: The heat exchanger includes a heat exchange core (2) having a fluid channel (4), the fluid channel (4) including a fluid inlet (5) and a plurality of fluid through holes (6); the heat exchange core (2) is provided with a plurality of first inter-plate channels (7) and a plurality of second inter-plate channels (8), the first inter-plate channels (7) and the second inter-plate channels (8) are isolated from each other, and the fluid through holes (6) connect two adjacent first inter-plate channels (7); the first inter-plate channel (7) near the fluid inlet (5) is defined as a first sub-inter-plate channel (55), and the first inter-plate channel (7) located inside the heat exchanger is defined as a second sub-inter-plate channel (56); the flow cross-sectional area of ​​the first sub-inter-plate channel (55) is smaller than the flow cross-sectional area of ​​the second sub-inter-plate channel (56).

12. The heat exchanger according to claim 11, characterized in that: The wall of the fluid inlet (5) is defined as the first wall (50), and the wall of the fluid through hole (6) is defined as the second wall (51). The first hole wall (50) has a first end (52) which is close to the fluid through hole (6); the second hole wall (51) has a second end (53) and a third end (54), which is close to the fluid inlet (5) and the third end (54) is far from the fluid inlet (5); along the axial direction of the fluid channel (4), the distance between the second end (53) of the second hole wall (51) close to the fluid inlet (5) and the first end (52) of the first hole wall (50) is H1; for two adjacent fluid through holes (6), the distance between the third end (54) of the second hole wall (51) close to the fluid inlet (5) and the second end (53) of the second hole wall (51) far from the fluid inlet (5) is H2; H1 and H2 satisfy the following relationship: H1 < H2.

13. The heat exchanger according to claim 11 or 12, characterized in that: The plates forming the first inter-plate channel (7) include a first plate (9) and a second plate (10). Along the axial direction of the fluid channel (4), the distance between the base plate portion (11) of the first plate and the base plate portion (12) of the second plate is defined as the inter-plate distance. The inter-plate distance H3 of the first inter-plate channel (7) located at the top and the inter-plate distance H4 of the first inter-plate channel (7) located inside satisfy the following relationship: H3 < H4.

14. The heat exchanger according to claim 13, characterized in that: The first plate (9) having the fluid inlet (5) is defined as a side plate. The side plate is provided with a protrusion (13). The hole wall forming the fluid inlet (5) includes the protrusion (13), and the protrusion (13) extends toward the first inter-plate channel (7) relative to the base plate portion (11) of the side plate. The distance between the end of the protrusion (13) near the first inter-plate channel (7) and the second end (53) of the second hole wall (51) adjacent to the fluid inlet (5) is H1.

15. The heat exchanger according to claim 14, characterized in that: H1 and H2 satisfy the following relationship: H1 = (0.5 ~ 0.8) × H2.

16. The heat exchanger according to claim 14 or 15, characterized in that: The first hole wall (50) and the protrusion (13) are integrally formed; or, the first hole wall (50) and the protrusion (13) are welded and fixed.

17. The heat exchanger according to claim 16, characterized in that: The first plate (9) includes a distribution area (40) and a heat exchange area (41). The distribution area (40) is provided with the fluid inlet (5). A portion of the first hole wall (50) forming the fluid inlet (5) is provided with the protrusion (13), and the portion of the first hole wall (50) is close to the heat exchange area (41).

18. The heat exchanger according to claims 11-12, 14-15 and 16, characterized in that: The plate-to-plate channel at the bottom of the heat exchange core (2) is the first plate-to-plate channel (7); the plate-to-plate distance H5 of the first plate-to-plate channel (7) at the bottom of the heat exchange core (2) and the plate-to-plate distance H4 of the first plate-to-plate channel (7) inside satisfy the following relationship: H5 < H4.

19. The heat exchanger according to claims 11-12, 14-15 and 16, characterized in that: The inter-plate channel at the bottom end of the heat exchange core (2) is the second inter-plate channel (8). The inter-plate distance H6 of the second inter-plate channel (8) at the bottom end of the heat exchange core (2) and the inter-plate distance H7 of the second inter-plate channel (8) inside satisfy the following relationship: H6 < H7.

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