Heat exchanger and flow channel plate

Abstract

This invention provides a heat exchanger and a flow channel plate. The heat exchanger includes: a first flow channel plate; a second flow channel plate, the first and second flow channel plates forming a flow channel chamber for fluid passage, the second flow channel plate having a fluid inlet and a fluid outlet communicating with the flow channel chamber; a partition located between the first and second flow channel plates, the partition dividing the flow channel chamber into a first flow channel extending longitudinally along the partition on a first side of the partition, a second flow channel extending longitudinally along the partition on a second side of the partition, and a through flow channel connecting the first and second flow channels, the fluid inlet communicating with the first flow channel, and the second flow channel communicating with the fluid outlet; wherein, the partition has a bypass flow channel, the inlet of the bypass flow channel communicating with the first flow channel, and the outlet of the bypass flow channel communicating with the second flow channel. The technical solution of this invention solves the problem of high flow resistance in heat exchangers.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger technology, and more specifically, to a heat exchanger and flow channel plate. Background Technology

[0002] A heat exchanger typically includes a top plate, a bottom plate, and multiple flow channel plates stacked sequentially between the top and bottom plates. A flow channel for the cooling medium to pass through can be formed between two adjacent flow channel plates. When the cooling medium flows in the flow channel, it often encounters resistance, i.e., flow resistance.

[0003] In existing technologies, when fluid changes its flow direction along the flow channel on the flow channel plate, a large flow resistance usually occurs, resulting in high pressure loss and reduced heat transfer performance. Summary of the Invention

[0004] The main objective of this invention is to provide a heat exchanger and flow channel plate to solve the problem of high flow resistance in existing heat exchangers.

[0005] To achieve the above objectives, the present invention provides a heat exchanger, comprising: a first flow channel plate; a second flow channel plate, wherein the first flow channel plate and the second flow channel plate form a flow channel chamber for fluid passage, the second flow channel plate having a fluid inlet and a fluid outlet communicating with the flow channel chamber; a partition, located between the first flow channel plate and the second flow channel plate, the partition dividing the flow channel chamber into a first flow channel extending longitudinally along the partition on a first side of the partition, a second flow channel extending longitudinally along the partition on a second side of the partition, and a through flow channel for connecting the first flow channel and the second flow channel, the fluid inlet communicating with the first flow channel, and the second flow channel communicating with the fluid outlet; wherein the partition is provided with a bypass flow channel, the inlet of the bypass flow channel communicating with the first flow channel, and the outlet of the bypass flow channel communicating with the second flow channel.

[0006] Furthermore, the second flow channel plate is provided with a partition, and the side of the first flow channel plate facing the second flow channel plate is provided with a recess, which extends longitudinally along the partition; the partition and the recess are fitted together and sealed, and the fluid inlet and the fluid outlet are located on the first side and the second side of the partition, respectively.

[0007] Furthermore, the partition includes a first partition and a second partition connected to each other. The first partition is spaced apart from the first end of the second flow channel plate to form a flow channel. The second partition is connected to the second end of the second flow channel plate. The first partition is embedded in the recess and sealed with the recess. The second partition is sealed with the first flow channel plate.

[0008] Furthermore, a sealed chamber is formed between the recess and the partition, the sealed chamber is connected to the bypass channel, and the inlet and outlet of the bypass channel are connected to the two sides of the sealed chamber, respectively.

[0009] Furthermore, the bypass channel is a through hole that passes through the partition. The through hole extends in a direction that is set at an angle to the longitudinal direction of the partition. One end of the through hole is connected to the first channel, and the other end of the through hole is connected to the second channel.

[0010] Furthermore, the second flow channel plate is provided with a partition, and the bypass flow channel is a groove. The groove is recessed into the partition from the side of the partition facing the first flow channel plate, and the groove extends from the first side to the second side.

[0011] Furthermore, the second flow channel plate is made of sheet metal, and the depth of the groove is greater than or equal to 0.5 times the thickness of the sheet metal and less than or equal to 1.5 times the thickness of the sheet metal.

[0012] Furthermore, the first side and the second side of the partition are both sealed to the inner wall of the recess, the third side of the partition is disposed facing the first flow channel plate and has a gap space between it and the first flow channel plate, and the third side is located between the first side and the second side; the first side of the partition and / or the recess is provided with a first groove, the second side of the partition and / or the recess is provided with a second groove, the first flow channel communicates with the gap space through the first groove, and the second flow channel communicates with the gap space through the second groove.

[0013] Furthermore, when viewed in cross-section of the bypass channel, at least part of the inner wall of the bypass channel is arc-shaped.

[0014] Furthermore, the inner wall of the bypass channel includes a first sidewall, a bottom wall, a second sidewall, and at least one arcuate wall, wherein the first sidewall and / or the second sidewall are connected to the bottom wall through the arcuate wall.

[0015] Furthermore, the arc-shaped wall is circular, with a radius greater than or equal to 0.1 mm and less than or equal to 0.3 mm.

[0016] Furthermore, along the longitudinal direction of the partition, the partition has a first end close to the flow channel and a second end far from the flow channel; the bypass channel is located between the middle position of the partition and the first end, and the distance between the middle position and the first end and the distance between the middle position and the second end are equal.

[0017] Furthermore, there are one or more bypass channels, and multiple bypass channels are arranged sequentially along the extension direction of the partition.

[0018] Furthermore, the heat exchanger includes multiple first flow channel plates and multiple second flow channel plates, which are alternately fitted together along the thickness direction of the second flow channel plates.

[0019] According to another aspect of the present invention, a flow channel plate is provided, the flow channel plate including a body portion and a partition portion, the body portion having a flow channel cavity and a fluid inlet and a fluid outlet communicating with the flow channel cavity; the partition portion is provided in the flow channel cavity to divide the flow channel cavity into a first flow channel extending longitudinally along the partition portion on a first side of the partition portion, a second flow channel extending longitudinally along the partition portion on a second side of the partition portion, and a through flow channel for connecting the first flow channel and the second flow channel, the fluid inlet communicating with the first flow channel, and the second flow channel communicating with the fluid outlet; wherein, a bypass flow channel is provided on the partition portion, the inlet of the bypass flow channel communicating with the first flow channel, and the outlet of the bypass flow channel communicating with the second flow channel.

[0020] By applying the technical solution of this invention, compared to the method of having the fluid entering through the fluid inlet sequentially pass through the first flow channel, the through flow channel, and the second flow channel, bypassing the partition and flowing out through the fluid outlet, this application, by additionally providing a bypass flow channel, allows the through flow channel and the bypass flow channel to run parallel, thereby increasing the cross-sectional area through which the fluid passes. This allows the fluid between the first and second flow channels to be more evenly distributed in the bypass flow channel and the through flow channel, thereby reducing the flow velocity of the fluid in the bypass flow channel and the through flow channel, and thus reducing flow resistance. In this way, on the one hand, high pressure loss of the fluid can be avoided, thereby reducing the power consumption of the compressor; on the other hand, the fluid can pass through a larger surface area at a lower flow velocity, thereby improving heat transfer efficiency. Attached Figure Description

[0021] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0022] Figure 1 A schematic diagram of an embodiment of the heat exchanger of the present invention is shown;

[0023] Figure 2 It shows Figure 1 A schematic diagram of the structure of an embodiment of the second flow channel plate of a heat exchanger;

[0024] Figure 3 It shows Figure 2 A partial enlarged view of the second flow channel plate;

[0025] Figure 4 It shows Figure 1 A schematic diagram of the structure of an embodiment of the first flow channel plate of a heat exchanger;

[0026] Figure 5 A schematic diagram of an embodiment of the heat exchanger of the present invention is shown;

[0027] Figure 6 It shows Figure 5 Front view of the heat exchanger;

[0028] Figure 7 It shows Figure 6 A cross-sectional view of the heat exchanger along line AA;

[0029] Figure 8 It shows Figure 1 A schematic diagram of another embodiment of the first flow channel plate of the heat exchanger;

[0030] Figure 9 It shows Figure 1 A schematic diagram of another embodiment of the second flow channel plate of the heat exchanger.

[0031] The above figures include the following reference numerals:

[0032] 1. Second flow channel plate; 2. First flow channel plate; 3. Top plate; 4. Bottom plate; 10. Body part; 11. Fluid inlet; 12. Fluid outlet; 13. First flow channel; 14. Flow channel; 15. Second flow channel; 20. Separator; 21. Bypass flow channel; 211. First side wall; 212. Bottom wall; 213. Second side wall; 214. Arc-shaped wall; 22. First end; 23. Second end; 25. Recess; 26. First separator; 27. Second separator; 28. First groove; 29. ​​Second groove. Detailed Implementation

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0034] like Figures 1 to 9 As shown, an embodiment of the present invention provides a heat exchanger. A first flow channel plate 2; a second flow channel plate 1, the first flow channel plate 2 and the second flow channel plate 1 forming a flow channel chamber for fluid passage, the second flow channel plate 1 having a fluid inlet 11 and a fluid outlet 12 communicating with the flow channel chamber; a partition 20, located between the first flow channel plate 2 and the second flow channel plate 1, the partition 20 dividing the flow channel chamber into a first flow channel 13 extending longitudinally along the partition 20 on a first side of the partition 20, a second flow channel 15 extending longitudinally along the partition 20 on a second side of the partition 20, and a through flow channel 14 connecting the first flow channel 13 and the second flow channel 15, the fluid inlet 11 communicating with the first flow channel 13, and the second flow channel 15 communicating with the fluid outlet 12; wherein, the partition 20 has a bypass flow channel 21, the inlet of the bypass flow channel 21 communicating with the first flow channel 13, and the outlet of the bypass flow channel 21 communicating with the second flow channel 15.

[0035] In the above-described technical solution, compared to the fluid entering through the fluid inlet 11 sequentially passing through the first flow channel 13, the through flow channel 14, and the second flow channel 15, bypassing the partition 20 and flowing out through the fluid outlet 12, in this application, by additionally providing a bypass flow channel 21, the through flow channel 14 and the bypass flow channel 21 can be parallel, thereby increasing the cross-sectional area through which the fluid passes. This allows the fluid between the first flow channel 13 and the second flow channel 15 to be more evenly distributed in the bypass flow channel 21 and the through flow channel 14, thereby reducing the flow velocity of the fluid in the bypass flow channel 21 and the through flow channel 14, and thus reducing flow resistance. In this way, on the one hand, high pressure loss of the fluid can be avoided, thereby reducing the power consumption of the compressor; on the other hand, the fluid can pass through a larger surface area at a lower flow velocity, thereby improving heat transfer efficiency.

[0036] Specifically, in an embodiment of the present invention, the partition 20 is a strip-shaped structure, and the length direction of the strip-shaped structure is the longitudinal direction of the partition 20, that is... Figure 2 The left and right directions in the middle, among which, Figure 2 The L direction in the diagram is the longitudinal direction.

[0037] Specifically, in an embodiment of the present invention, the partition 20 is connected to the second flow channel plate 1, and the side of the partition 20 facing the first flow channel plate 2 is sealed and fitted with the first flow channel plate 2 to separate the first flow channel and the second flow channel.

[0038] like Figures 1 to 4 As shown, in an embodiment of the present invention, a partition 20 is provided on the second flow channel plate 1, and a recess 25 is provided on the side of the first flow channel plate 2 facing the second flow channel plate 1, and the recess 25 extends longitudinally along the partition 20; the partition 20 and the recess 25 are fitted together and sealed together, and the fluid inlet 11 and the fluid outlet 12 are located on the first side and the second side of the partition 20, respectively.

[0039] With the above arrangement, the fluid inlet 11 and the fluid outlet 12 can be separated on both sides of the partition 20, and the fluid inlet 11 and the fluid outlet 12 are not connected, so that the fluid can flow into the first flow channel 13 through the fluid inlet 11, and flow out of the fluid outlet 12 in sequence through the first flow channel 13, the flow passage 14 and the second flow channel 15.

[0040] In some embodiments, the first flow channel plate 2 and / or the second flow channel plate 1 are formed by sheet metal stamping. Specifically, the partition portion 20 is formed on the second flow channel plate 1 by stamping, and the recessed portion 25 is formed on the first flow channel plate 2 by stamping.

[0041] In one embodiment, the partition 20 may also be disposed on the first flow channel plate 2.

[0042] like Figures 1 to 4As shown, in an embodiment of the present invention, a sealed chamber is formed between the recessed portion 25 and the partition portion 20. The sealed chamber is connected to the bypass channel 21, and the inlet and outlet of the bypass channel 21 are respectively connected to the two sides of the sealed chamber.

[0043] With the above configuration, the fluid entering from the inlet of the bypass channel 21 can enter the sealed cavity formed by the recess 25 and the partition 20, and flow out from the outlet of the bypass channel 21. In this way, the additional path of fluid flow is increased to increase the cross-sectional area through which the fluid passes, thereby reducing the flow velocity of the fluid in the bypass channel 21 and the flow channel 14, and thus reducing the flow resistance.

[0044] like Figures 1 to 4 As shown, in an embodiment of the present invention, the partition 20 includes a first partition 26 and a second partition 27 connected to each other. The first partition 26 is spaced apart from the first end of the second flow channel plate 1 to form a flow channel 14; the second partition 27 is connected to the second end of the second flow channel plate 1. The first partition 26 is embedded in the recess 25 and is sealed with the recess 25, and the second partition 27 is sealed with the first flow channel plate 2. In this way, the fluid inlet 11 and the fluid outlet 12 can be better blocked, as well as the first flow channel 13 and the second flow channel 15 can be better blocked.

[0045] Specifically, in an embodiment of the present invention, the first flow channel plate 2 is located above the second flow channel plate 1, and at least part of the inlet of the bypass flow channel 21 is located below the sealing fit position of the first partition 26 and the recess 25, so that the inlet of the bypass flow channel 21 can communicate with the first flow channel 13, and at least part of the outlet of the bypass flow channel 21 is located below the sealing fit position of the first partition 26 and the recess 25, so that the outlet of the bypass flow channel 21 can communicate with the second flow channel 15.

[0046] like Figure 2 and Figure 3 As shown in the embodiment of the present invention, the second flow channel plate 1 is provided with a partition 20, and the bypass flow channel 21 is a groove. The groove is recessed into the partition 20 from the side of the partition 20 facing the first flow channel plate 2, and the groove extends from the first side to the second side.

[0047] With the above configuration, some of the fluid in the first flow channel 13 can enter the second flow channel 15 through the groove, thereby reducing the flow resistance of the fluid passing through the flow channel 14.

[0048] Furthermore, by setting grooves, a flow channel parallel to the flow channel 14 can be added without increasing the volume of the second flow channel plate 1, thereby making the structure of the heat exchanger more compact.

[0049] Preferably, in an embodiment of the present invention, the groove is formed on the partition 20 by stamping to facilitate processing.

[0050] In one embodiment, the groove can also be formed by injection molding.

[0051] In one embodiment, the bypass channel 21 is a through hole penetrating the partition 20. The through hole extends at an angle to the longitudinal direction of the partition 20, with one end connected to the first channel 13 and the other end connected to the second channel 15. Thus, some fluid in the first channel 13 can also enter the second channel 15 through the through hole. The through hole extends perpendicular to the longitudinal direction of the partition 20 and can be formed by pre-embedded injection molding.

[0052] like Figure 2 As shown, in an embodiment of the present invention, the second flow channel plate 1 is made of sheet metal, and the depth of the groove is greater than or equal to 0.5 times the thickness of the sheet metal and less than or equal to 1.5 times the thickness of the sheet metal. In this way, on the one hand, it can avoid the difficulty of stamping due to excessive groove depth; on the other hand, it can avoid the low flow diversion effect due to excessively shallow groove, thereby achieving better flow resistance.

[0053] like Figures 5 to 9 As shown, in another embodiment of the present invention, the first side and the second side of the partition 20 are both sealed to the inner wall of the recess 25, the third side of the partition 20 is disposed toward the first flow channel plate 2 and has a gap space between it and the first flow channel plate 2, and the third side is located between the first side and the second side; the first side of the partition 20 and / or the recess 25 is provided with a first groove 28, the second side of the partition 20 and / or the recess 25 is provided with a second groove 29, the first flow channel 13 communicates with the gap space through the first groove 28, and the second flow channel 15 communicates with the gap space through the second groove 29.

[0054] With the above configuration, the fluid in the first flow channel 13 can enter the space between the third side and the first flow channel plate 2 through the first groove 28, and then enter the second flow channel 15 through the second groove 29 from the space, forming a bypass flow channel 21 that connects the first flow channel 13 and the second flow channel 15. The through flow channel 14 can run parallel to the bypass flow channel 21, thereby increasing the cross-sectional area through which the fluid passes. This allows the fluid between the first flow channel 13 and the second flow channel 15 to be more evenly distributed in the bypass flow channel 21 and the through flow channel 14, thereby reducing the flow velocity of the fluid in the bypass flow channel 21 and the through flow channel 14, and thus reducing the flow resistance. In this way, on the one hand, high pressure loss of the fluid can be avoided, thereby reducing the power consumption of the compressor; on the other hand, the fluid can pass through a larger surface area at a lower flow velocity, thereby improving the heat transfer efficiency.

[0055] like Figure 8 and Figure 9As shown, in another embodiment of the present invention, a first groove 28 is provided on the first side of the partition portion 20 and the first side of the recessed portion 25, and a second groove 29 is provided on the second side of the partition portion 20 and the recessed portion 25.

[0056] like Figure 3 As shown in the embodiment of the present invention, when viewed in cross-section of the bypass channel 21, at least a portion of the inner wall of the bypass channel 21 is arc-shaped.

[0057] By setting up as described above, turbulence in the bypass channel 21 can be reduced, thereby reducing flow resistance. This can, on the one hand, prevent high pressure loss in the fluid, thus reducing compressor power consumption; on the other hand, the fluid can pass through a larger surface area at a lower flow rate, thereby improving heat transfer efficiency.

[0058] In some embodiments, the cross-section of the bypass channel 21 is perpendicular to the extension direction of the bypass channel 21.

[0059] like Figure 3 As shown, in an embodiment of the present invention, the inner wall of the bypass channel 21 includes a first side wall 211, a bottom wall 212, a second side wall 213, and at least one arcuate wall 214. The first side wall 211 and / or the second side wall 213 are connected to the bottom wall 212 through the arcuate wall 214.

[0060] With the above configuration, the arc-shaped wall 214 can reduce the turbulence of the fluid in the bypass channel 21, thereby reducing the flow resistance.

[0061] Preferably, in an embodiment of the present invention, along the longitudinal direction of the partition 20, the first sidewall 211 and the second sidewall 213 are located on both sides of the bottom wall 212, the first sidewall 211 and the bottom wall 212 are connected by an arc-shaped wall 214, and the second sidewall 213 and the bottom wall 212 are connected by an arc-shaped wall 214.

[0062] Preferably, in an embodiment of the present invention, the end of the first sidewall 211 away from the bottom wall 212 is provided with an arc-shaped wall, and the end of the second sidewall 213 away from the bottom wall 212 is also provided with an arc-shaped wall. In this way, the arc-shaped wall 214 can reduce the turbulence of the fluid in the bypass channel 21, thereby reducing the flow resistance.

[0063] In one embodiment, when viewed in cross-section, the inner wall of the entire bypass channel 21 is arc-shaped, for example, semi-circular.

[0064] Specifically, in the embodiments of the present invention, the arc-shaped wall 214 is arc-shaped, with a radius greater than or equal to 0.1 mm and less than or equal to 0.3 mm. This can more effectively reduce turbulence in the bypass channel 21, thereby more effectively reducing flow resistance.

[0065] Preferably, in an embodiment of the present invention, the radius of the arc is equal to 0.1 mm.

[0066] like Figure 2 As shown, in an embodiment of the present invention, along the longitudinal direction of the partition 20, the partition 20 has a first end 22 close to the flow channel 14 and a second end 23 away from the flow channel 14; the bypass channel 21 is located between the middle position B of the partition 20 and the first end, and the distance between the middle position B and the first end 22 and the distance between the middle position B and the second end 23 are equal.

[0067] In the above technical solution, some fluid can flow out from the fluid outlet 12 after passing through the first flow channel 13, the bypass flow channel 21, and the second flow channel 15. By setting the bypass flow channel 21 between the middle position B of the partition 20 and the first end, the flow path of the above-mentioned fluid in the first flow channel 13 and the second flow channel 15 can be increased, so that the above-mentioned fluid can contact the second flow channel plate 1 more fully before flowing out from the fluid outlet 12, thereby increasing the heat exchange time and improving the heat transfer efficiency.

[0068] Preferably, such as Figure 2 As shown in the embodiment of the present invention, there is one bypass channel 21. In this way, while ensuring reduced flow resistance, the problem of excessive fluid having too short a residence time in the first channel 13 and the second channel 15 can be avoided, thereby improving heat transfer efficiency.

[0069] In one embodiment, there may be multiple bypass channels 21, which are arranged sequentially along the extending direction of the partition 20. This increases the number of channels parallel to the through channel 14, thereby further reducing flow resistance.

[0070] like Figure 2 As shown in the embodiment of the present invention, the first flow channel 13, the through flow channel 14, and the second flow channel 15 are arranged in a U-shape. This allows the fluid to flow along the U-shaped path, thereby enabling the fluid to have sufficient contact time with the second flow channel plate 1, thus improving the heat exchange effect.

[0071] Specifically, in an embodiment of the present invention, the longitudinal direction of the partition 20 is perpendicular to the extension direction of the flow channel 14.

[0072] like Figure 2 As shown in the embodiment of the present invention, the second flow channel plate 1 has a plurality of protrusions on the side facing the first flow channel plate 2, and the plurality of protrusions are spaced apart, which helps to dissipate heat and turbulence.

[0073] like Figures 5 to 7As shown in the embodiment of the present invention, the heat exchanger includes a plurality of first flow channel plates 2 and a plurality of second flow channel plates 1, which are alternately fitted together along the thickness direction of the second flow channel plates 1. In this way, the first flow channel plates 2 and the second flow channel plates 1 can form a closed space for the passage of cooling water.

[0074] The first flow channel plate 2 can be located above or below the second flow channel plate 1.

[0075] Specifically, such as Figure 5 As shown, in an embodiment of the present invention, the heat exchanger further includes a top plate 3 and a bottom plate 4, with a plurality of first flow channel plates 2 and a plurality of second flow channel plates 1 located between the top plate 3 and the bottom plate 4. The top plate 3 is fitted with one of the first flow channel plates 2 and the second flow channel plates 1, and the bottom plate 4 is fitted with the other of the first flow channel plates 2 and the second flow channel plates 1.

[0076] like Figure 2 and Figure 9 As shown, an embodiment of the present invention provides a flow channel plate. The flow channel plate includes a body portion 10 and a partition portion 20. The body portion 10 has a flow channel cavity and a fluid inlet 11 and a fluid outlet 12 communicating with the flow channel cavity. The partition portion 20 is provided inside the flow channel cavity to divide the flow channel cavity into a first flow channel 13 extending longitudinally along the partition portion 20 on a first side of the partition portion 20, a second flow channel 15 extending longitudinally along the partition portion 20 on a second side of the partition portion 20, and a through flow channel 14 for connecting the first flow channel 13 and the second flow channel 15. The fluid inlet 11 communicates with the first flow channel 13, and the second flow channel 15 communicates with the fluid outlet 12. The partition portion 20 is provided with a bypass flow channel 21, the inlet of which communicates with the first flow channel 13, and the outlet of which communicates with the second flow channel 15.

[0077] In the above technical solution, by additionally setting a bypass channel 21, the second channel plate 1 and the first channel plate 2 can cooperate to make the through channel 14 parallel to the bypass channel 21, thereby increasing the cross-sectional area through which the fluid passes. This allows the fluid between the first channel 13 and the second channel 15 to be more evenly distributed in the bypass channel 21 and the through channel 14, thereby reducing the flow velocity of the fluid in the bypass channel 21 and the through channel 14, and thus reducing the flow resistance. In this way, on the one hand, high pressure loss of the fluid can be avoided, thereby reducing the power consumption of the compressor; on the other hand, the fluid can pass through a larger surface area at a lower flow velocity, thereby improving the heat transfer efficiency.

[0078] The flow channel plate provided in the embodiments of the present invention is the second flow channel plate in the above-mentioned heat exchanger.

[0079] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects: Compared with the fluid entering through the fluid inlet sequentially passing through the first flow channel, the through flow channel, and the second flow channel to bypass the partition and flow out through the fluid outlet, in this application, by additionally setting a bypass flow channel, the through flow channel and the bypass flow channel can be parallel, thereby increasing the cross-sectional area through which the fluid passes. This allows the fluid between the first and second flow channels to be more evenly distributed in the bypass flow channel and the through flow channel, thereby reducing the flow velocity of the fluid in the bypass flow channel and the through flow channel, and thus reducing the flow resistance. In this way, on the one hand, high pressure loss of the fluid can be avoided, thereby reducing the power consumption of the compressor; on the other hand, the fluid can pass through a larger surface area at a lower flow velocity, thereby improving the heat transfer efficiency.

[0080] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A heat exchanger, characterized in that, include: First flow channel plate (2); The second flow channel plate (1) forms a flow channel chamber for fluid passage between the first flow channel plate (2) and the second flow channel plate (1). The second flow channel plate (1) is provided with a fluid inlet (11) and a fluid outlet (12) communicating with the flow channel chamber. A partition (20) is located between the first flow channel plate (2) and the second flow channel plate (1). The partition (20) is used to divide the flow channel chamber into a first flow channel (13) extending longitudinally along the partition (20) on the first side of the partition (20), a second flow channel (15) extending longitudinally along the partition (20) on the second side of the partition (20), and a flow passage (14) for connecting the first flow channel (13) and the second flow channel (15). The fluid inlet (11) is connected to the first flow channel (13), and the second flow channel (15) is connected to the fluid outlet (12). The partition (20) is provided with a bypass channel (21), the inlet of the bypass channel (21) is connected to the first channel (13), and the outlet of the bypass channel (21) is connected to the second channel (15).

2. The heat exchanger according to claim 1, characterized in that, The second flow channel plate (1) is provided with the partition (20), and the first flow channel plate (2) is provided with a recess (25) on the side facing the second flow channel plate (1), and the recess (25) extends longitudinally along the partition (20); The partition (20) is fitted and sealed with the recess (25), and the fluid inlet (11) and the fluid outlet (12) are located on the first side and the second side of the partition (20), respectively.

3. The heat exchanger according to claim 2, characterized in that, The partition (20) includes a first partition (26) and a second partition (27) connected to each other. The first partition (26) is spaced apart from the first end of the second flow channel plate (1) to form the flow channel (14). The second partition (27) is connected to the second end of the second flow channel plate (1). The first partition (26) is embedded in the recess (25) and is sealed to the recess (25). The second partition (27) is sealed to the first flow channel plate (2).

4. The heat exchanger according to claim 2, characterized in that, A sealed chamber is formed between the recess (25) and the partition (20), the sealed chamber is connected to the bypass channel (21), and the inlet of the bypass channel (21) and the outlet of the bypass channel (21) are respectively connected to the two sides of the sealed chamber.

5. The heat exchanger according to claim 1, characterized in that, The bypass channel (21) is a through hole that passes through the partition (20). The through hole extends in a direction that is set at an angle to the longitudinal direction of the partition (20). One end of the through hole is connected to the first channel (13), and the other end of the through hole is connected to the second channel (15).

6. The heat exchanger according to claim 1, characterized in that, The second flow channel plate (1) is provided with the partition (20), the bypass flow channel (21) is a groove, the groove is recessed into the partition (20) from the side of the partition (20) facing the first flow channel plate (2), and the groove extends from the first side to the second side.

7. The heat exchanger according to claim 6, characterized in that, The second flow channel plate (1) is made of a plate, and the depth of the groove is greater than or equal to 0.5 times the thickness of the plate and less than or equal to 1.5 times the thickness of the plate.

8. The heat exchanger according to any one of claims 2 to 4, characterized in that, The first side and the second side of the partition (20) are sealed to the inner wall of the recess (25), and the third side of the partition (20) is disposed toward the first flow channel plate (2) and has a gap space between it and the first flow channel plate (2). The third side is located between the first side and the second side. The first side of the partition (20) and / or the recess (25) is provided with a first groove (28), and the second side of the partition (20) and / or the recess (25) is provided with a second groove (29). The first flow channel communicates with the interval space through the first groove (28), and the second flow channel communicates with the interval space through the second groove (29).

9. The heat exchanger according to any one of claims 1 to 7, characterized in that, When viewed in cross-section of the bypass channel (21), at least part of the inner wall of the bypass channel (21) is arc-shaped.

10. The heat exchanger according to claim 9, characterized in that, The inner wall of the bypass channel (21) includes a first side wall (211), a bottom wall (212), a second side wall (213), and at least one arcuate wall (214), wherein the first side wall (211) and / or the second side wall (213) are connected to the bottom wall (212) through the arcuate wall (214).

11. The heat exchanger according to claim 10, characterized in that, The arc-shaped wall (214) is arc-shaped, with a radius greater than or equal to 0.1 mm and less than or equal to 0.3 mm.

12. The heat exchanger according to any one of claims 1 to 7, characterized in that, Along the longitudinal direction of the partition (20), the partition (20) has a first end (22) close to the flow channel (14) and a second end (23) away from the flow channel (14). The bypass channel (21) is located between the middle position (B) of the partition (20) and the first end (22), and the distance between the middle position (B) and the first end (22) is equal to the distance between the middle position (B) and the second end (23).

13. The heat exchanger according to any one of claims 1 to 7, characterized in that, There are one or more bypass channels (21), and the multiple bypass channels (21) are arranged sequentially along the extension direction of the partition (20).

14. The heat exchanger according to any one of claims 1 to 7, characterized in that, The heat exchanger includes a plurality of first flow channel plates (2) and a plurality of second flow channel plates (1), wherein the first flow channel plates (2) and the second flow channel plates (1) are alternately fitted together along the thickness direction of the second flow channel plate (1).

15. A flow channel plate, characterized in that, The flow channel plate includes a body portion (10) and a partition portion (20). The body portion (10) has a flow channel cavity and a fluid inlet (11) and a fluid outlet (12) communicating with the flow channel cavity. The partition portion (20) is provided inside the flow channel cavity. The partition portion (20) is used to divide the flow channel cavity into a first flow channel (13) located on the first side of the partition portion (20) and extending longitudinally along the partition portion (20), a second flow channel (15) located on the second side of the partition portion (20) and extending longitudinally along the partition portion (20), and a flow passage (14) for connecting the first flow channel (13) and the second flow channel (15). The fluid inlet (11) communicates with the first flow channel (13), and the second flow channel (15) communicates with the fluid outlet (12). The partition (20) is provided with a bypass channel (21), the inlet of the bypass channel (21) is connected to the first channel (13), and the outlet of the bypass channel (21) is connected to the second channel (15).

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