CN217504442U - Heat exchanger - Google Patents

Abstract

The application discloses a heat exchanger, which comprises a heat exchange core body, wherein the heat exchange core body comprises a plurality of plates, each plate comprises a first concave part and a second concave part which are in single or multiple V shapes, the first concave part is positioned on a second surface of each plate, the second concave part is positioned on a third surface of each plate, the first concave parts and the second concave parts are alternately arranged along a first direction, the distance between the first concave part and the first concave part adjacent to the first concave part of the same plate is L1, one of the two adjacent plates is defined as a first plate, the other one of the two adjacent plates is defined as a second plate, the first surface is defined,the first surface is perpendicular to the lamination direction of the plates, the projection of the first connection position of the first concave part of the first plate and the projection of the first concave part of the second plate on the first surface have a first overlapping area along the lamination direction of the plates, and the length of the first overlapping area is greater than or equal to that along the first direction

And less than or equal to L1, so as to improve the heat exchange effect of the heat exchanger.

Description

Heat exchanger

Technical Field

The application relates to the technical field of heat exchange, in particular to a heat exchanger.

Background

The heat exchanger generally comprises a plurality of stacked plates, an inter-plate channel for fluid circulation is formed between every two adjacent plates, in order to improve the turbulence effect of the plates on fluid, a plurality of V-shaped grooves or multiple V-shaped grooves are formed in at least part of the plates, the opening directions of V-shaped included angles of the V-shaped grooves or multiple V-shaped grooves of the adjacent plates are opposite, the arrangement of the V-shaped grooves or multiple V-shaped grooves influences the uniformity of the fluid circulation in the inter-plate channel, and a certain rising space still exists in the heat exchange effect of the heat exchanger.

SUMMERY OF THE UTILITY MODEL

An object of this application is to provide a heat exchanger to be favorable to improving the heat transfer effect of heat exchanger.

In order to achieve the purpose, the following technical scheme is adopted in the application: a heat exchanger comprises a heat exchange core, the heat exchange core comprises a plurality of stacked plates, the heat exchange core comprises plate-to-plate channels, the plate-to-plate channels comprise first plate-to-plate channels and second plate-to-plate channels, at least part of the plates comprise a plurality of first concave parts, the first concave parts are arranged along a first direction, the first concave parts comprise first connecting parts, first extending sections and second extending sections, the first extending sections and the second extending sections are positioned on two sides of the first connecting parts, the first extending sections and the second extending sections are connected at the first connecting parts, the first concave parts and the first concave parts adjacent to the first concave parts of the same plate are at an interval L1, one of the two adjacent plates is defined as a first plate, the other plate is defined as a second plate, and the first extending sections and the second extending sections of the first plate are positioned on one side of the corresponding first connecting parts along the first direction, the first extending section and the second extending section of the second plate are positioned on the other side of the corresponding first connecting position, the first concave part of the first plate is opened towards the second plate, and the first concave part of the second plate is opened towards the second plateThe first surface is perpendicular to the plate stacking direction, the projection of the first connection position of the first concave part of the first plate on the first surface and the projection of the first concave part of the second plate on the first surface have a first overlapping area along the plate stacking direction, and the length of the first overlapping area is greater than or equal to that of the first overlapping area along the first direction

And L1 or less.

The beneficial effect of this application: if the flow area of the fluid flowing from the part of the first recess close to the first connection to the part of the first recess of the opposite plate close to the first connection is too small, the flow resistance of the area of the first inter-plate channel close to the first connection is too large, the flow of the fluid in the area of the fluid is too small or even not flowing, the fluid smoothly flows in other areas of the first inter-plate channel, and the length of the first overlapping area in the first direction is controlled to be larger than or equal to that of the first overlapping area

And the flow area of the fluid flowing from the part of the first concave part close to the first connection position to the part of the first concave part close to the first connection position corresponding to the opposite plate is prevented from being too small, so that the flow resistance of the area of the first inter-plate channel close to the first connection position relative to other areas of the first inter-plate channel is reduced, the smooth flow of the fluid in the area of the first inter-plate channel close to the first connection position is facilitated, the area of the first inter-plate channel for the smooth flow of the fluid is increased, the distribution uniformity of the fluid in the first inter-plate channel is improved, and the heat exchange effect of the heat exchanger is facilitated to be improved.

Drawings

FIG. 1 is a perspective view of one perspective of a heat exchanger of the present application;

FIG. 2 is an exploded view of the heat exchanger shown in FIG. 1;

FIG. 3 is a schematic view of a perspective of the heat exchanger shown in FIG. 1;

FIG. 4 is a schematic cross-sectional view taken at A-A in FIG. 3;

FIG. 5 is a schematic view of a portion of the enlarged structure at D in FIG. 4;

FIG. 6 is a schematic cross-sectional view at B-B in FIG. 3;

FIG. 7 is a schematic cross-sectional view at C-C in FIG. 3;

FIG. 8 is an enlarged partial schematic view of FIG. 7 at E;

FIG. 9 is an enlarged partial schematic view of FIG. 7 at F;

FIG. 10 is a schematic view of the assembly of two panels;

FIG. 11 is an enlarged partial view of FIG. 10 at G;

FIG. 12 is a perspective view of a panel from one perspective;

FIG. 13 is a perspective view of the plate shown in FIG. 12 from another perspective;

FIG. 14 is an enlarged partial schematic view of FIG. 12 at H;

FIG. 15 is an enlarged partial schematic view of FIG. 13 at I;

FIG. 16 is a schematic top view of the plate shown in FIG. 13;

FIG. 17 is a schematic view of the lap joint at the first connection of the first recesses of two adjacent sheets;

FIG. 18 is a schematic view in partial cross-section of another embodiment of an assembly of two panels;

FIG. 19 is a perspective view from one perspective of another embodiment of a plate;

fig. 20 is a partially enlarged structural view at J in fig. 19.

Detailed Description

The present invention is further described with reference to the following detailed description and accompanying figures 1-20, wherein numerous specific details are set forth in the following detailed description for a thorough understanding of the present invention. Those skilled in the art will appreciate that the specific components, devices, and features illustrated in the accompanying drawings and described herein are merely exemplary and should not be considered as limiting.

With reference to fig. 1-20, the heat exchanger 10 includes a heat exchange core 11, the heat exchange core 11 includes a plurality of plates 20, the plurality of plates 20 are stacked, the heat exchange core 11 includes an interplate channel, and the number of the plurality of plates in the specification is more than two; the interplate channels include a first interplate channel 31 and a second interplate channel 32, the heat exchange core 11 further includes a first flow channel and a second flow channel which are not communicated with each other, the first interplate channel 31 is a part of the first flow channel, the second interplate channel 32 is a part of the second flow channel, the first flow channel is used for flowing one fluid, specifically, the first flow channel is used for flowing a refrigerant, the second flow channel is used for flowing another fluid, and the another fluid can be water, coolant added with antifreeze, and the like; the heat exchanger 10 further comprises a first side plate 12 and a second side plate 13, the heat exchange core 11 is located between the first side plate 12 and the second side plate 13, the first side plate 12 is fixedly connected with the outermost plate of the corresponding heat exchange core 11, and the second side plate 13 is fixedly connected with the outermost plate of the corresponding heat exchange core 11.

The plate 20 comprises a first angular hole 23, a second angular hole 24, a third angular hole 25 and a fourth angular hole 26, of course, the plate 21 may also comprise a fifth angular hole, a sixth angular hole, etc.; the first corner hole 23 and the second corner hole 24 are located on the same side of the width direction of the plate 20, the width direction of the plate 21 is the W direction shown in fig. 13, the third corner hole 25 and the fourth corner hole 26 are located on the same side of the width direction of the plate 21, the first corner hole 23 and the fourth channel 26 are located on different sides of the width direction of the plate 21, the first corner holes 23 of the multiple plates 21 are at least partially aligned along the stacking direction of the multiple plates 21 to form a first pore passage 14, the second corner holes 24 of the multiple plates 21 are at least partially aligned along the stacking direction of the multiple plates 21 to form a second pore passage 15, the third corner holes 25 of the multiple plates 21 are at least partially aligned along the stacking direction of the multiple plates 21 to form a third pore passage 16, the fourth corner holes 26 of the multiple plates 21 are at least partially aligned along the stacking direction of the multiple plates 21 to form a fourth channel 17, at least a part of the first plate channel 31 connects the first pore passage 14 and the second pore passage 15, the first port channels 14, at least parts of the first plate interspaces 31 and the second port channels 15 are part of first flow passages, at least parts of the second plate interspaces 32 communicate with the third port channels 16 and the fourth port channels 17, and the third port channels 16, at least parts of the second plate interspaces 32 and the fourth port channels 17 are part of second flow passages, although at least parts of the first plate interspaces 31 may communicate with other port channels and at least parts of the second plate interspaces 32 may communicate with other port channels, for example: at least part of the first plate interspaces 31 communicate between the first port channel 14 and the third port channel 16, the first port channel 14, at least part of the first plate interspaces 31 and the third port channel 16 being part of a first flow passage.

It is understood that the shape of the plate 20 may be any shape such as circular, triangular, etc.; the fluid circulating in the first flow passage may be a medium other than the refrigerant; the heat exchanger 10 may also have multiple processes, for example, the heat exchange core 11 further includes a baffle plate, the baffle plate is located between two of the plates 20, the baffle plate separates the first channel 14 into a first sub-channel and a second sub-channel, a part of the first inter-plate channels 31 communicates with the first sub-channel and the second channel 15, another part of the first inter-plate channels 31 communicates with the second sub-channel and the second channel 15, the heat exchange core includes a first process and a second process, the first process includes the first sub-channel, a part of the first inter-plate channels 31 and the second channel 15, and the second process includes the second sub-channel, another part of the first inter-plate channels 31 and the second channel 15.

Referring to fig. 12-13, plate 20 includes a second face 27 and a third face 28, with second face 27 and third face 28 being on opposite sides of plate 20; the second face 27 and an adjacent one of the plates form a first inter-plate channel 31, the third face 28 and an adjacent other plate form a second inter-plate channel 32, at least some of the plates include a first concave portion 51 and a second concave portion 52, the first concave portion 51 and the second concave portion 52 are alternately arranged along a first direction, the first direction is an N direction shown in fig. 13, the first concave portion 51 is located on the second face 27, the second concave portion 52 is located on the third face 28, the first concave portion 51 and the second concave portion 52 each include a first extending section 511, a first connection 512 and a second extending section 513, the first extending section 511 and the second extending section 513 are located on two sides of the first connection 512, and the first extending section 511 and the second extending section 513 are connected at the first connection 512, in particular, referring to fig. 12 to 15, one end of the first extending section 511 is connected with one end of the second extending section 513; the first extension segment 511 and the second extension segment 513 are recessed in a V shape, specifically, the first recess 51 and the second recess 52 are recessed in a V shape, and an included angle C is defined between the first extension segment 511 and the second extension segment 513, and the included angle C is smaller than 180 °; referring to fig. 2, one of the two adjacent plates is defined as a first plate 21, the other is defined as a second plate 22, and the angular opening between the first extension 511 and the second extension 513 of the first plate 21 faces the opposite direction to the angular opening between the first extension and the second extension of the second plate 22; referring to fig. 8, the first recess 51 of the first sheet 21 opens toward the second sheet 22, and the first recess of the second sheet 22 opens toward the first sheet 21; the structure of the plate 20 has a certain flow disturbing effect on the fluid flowing through the first interplate channels 31, and improves the heat exchange effect between the fluid flowing through the first interplate channels 31 and another fluid.

It can be understood that, referring to fig. 8, two sides of the first recess 51 of the same plate along the first direction are provided with first protrusions 41, the first protrusions 41 are protruded relative to the first recess 51, two sides of the second recess 52 of the same plate along the first direction are provided with second protrusions 42, the second protrusions 42 are protruded relative to the second recess 52, the structure of the plate is approximately wavy, the first protrusion of the first plate 21 is abutted with the first protrusion of one adjacent second plate 22, and the second protrusion of the first plate 21 is abutted with the second protrusion of the other adjacent second plate; assembly of two sheets 20 as shown in fig. 10-11, the opening of the included angle between the first extension 511 and the second extension 513 of the first recess 51 of two adjacent sheets is opposite, and a plurality of abutting points 90 are provided between the protrusions of two adjacent sheets 20, specifically, the abutting points 90 are used as welding points between two adjacent sheets 20; the first extension 511 and the second extension 513 may extend in an arc, and in the first direction, the first extension and the second extension of the first plate 21 are located on one side of the corresponding first connection, and in the first direction, the first extension and the second extension of the second plate 22 are located on the other side of the corresponding first connection, where the corresponding first connection refers to a connection between the first extension and the second extension.

Referring to fig. 5, the area of the cross-section perpendicular to the extending direction of the first extension 513 defining the first recess 51 is S1, the area of the cross-section perpendicular to the extending direction of the first extension 513 defining the second recess 52 is S3, and the area S3 is greater than the area S1; the area of the cross section of the second extension 513 of the first recess 51 perpendicular to the extending direction thereof is the same as the area S1, and the area of the cross section of the second extension 513 of the second recess 52 perpendicular to the extending direction thereof is greater than the area S1; the capacity of the first recesses 51 is smaller than the capacity of the second recesses 52 and the capacity of the first interplate passages 31 is smaller than the capacity of the second interplate passages 32, the flow characteristics and heat exchange coefficients of different fluids are usually different, the capacity of the first interplate passages 31 on one side of the plate 20 is smaller than the capacity of the second interplate passages 32 on the other side to facilitate heat exchange between two different fluids, and the provision of the first interplate passages 31 with smaller capacity compresses the area where the fluids smoothly pass through the first interplate passages 31, to a certain extent affecting the uniformity of the fluid flow through the first interplate passages 31.

The first concave 51 and the first concave 51 adjacent to the first concave 51 of the same plate have a spacing L1, specifically, referring to fig. 8, the spacing L1 is the distance from the bottom of the first concave 51 of the same plate to the bottom of the first concave 51 of another adjacent first concave, and it can be understood that the spacing L1 is also the distance between the valleys of two adjacent first concave of the same plate; defining a first surface, the first surface being perpendicular to the stacking direction of the multiple plates 20, referring to fig. 17, along the stacking direction of the multiple plates 20, a projection of the first connection point 512 of the first concave 51 of the first plate 21 on the first surface and a projection of the first concave of the second plate 22 on the first surface have a first overlap area 5121, defining a length of the first overlap area 5121 along the first direction as L2, wherein a length L2 of the first overlap area 5121 is greater than or equal to the length L2 of the first overlap area 5121

And L1 or less; the flow pattern of the fluid in the first plate interspaces 31 is complicated by a portion of the fluid flowing along the first and second extensions 511, 513 of the first recess 51 and a portion of the fluid flowing across the first protrusion 41 and along the first recess 51The fluid and a part of the fluid flowing across the first protrusion 41 are gathered at a portion of the first recess 51 close to the first connection 512 and tend to flow into a portion of the first recess of the opposite plate close to the first connection, if the flow area of the fluid flowing from the portion of the first recess 51 close to the first connection 512 to a portion of the first recess of the opposite plate close to the second connection is too small, the flow resistance is easily caused to be too large, so that the flow rate of the fluid in the region of the first inter-plate channel 31 close to the first connection 512 is too small or even not flowing, i.e. the flow of the fluid in the region of the first inter-plate channel 31 close to the first connection 512 is not smooth, and the other part of the fluid flows in other regions of the first inter-plate channel 31 smoothly, i.e. the other part of the fluid flows in the regions of the first inter-plate channel 31 on both sides of the first inter-plate channel 512, thereby reducing the uniformity of distribution of the fluid in the first inter-plate channel 31, by controlling the length of the first overlap region 5121 in the first direction to be greater than or equal to 1/4L1 and less than or equal to L1, the flow area of the fluid flowing from the first connection of the first recess 51 to the first connection of the first recess corresponding to the opposite plate is prevented from being too small, so as to reduce the flow resistance of the region of the first inter-plate channel 31 close to the first connection 512 relative to other regions of the first inter-plate channel 31, and facilitate the smooth flow of the fluid in the region of the first inter-plate channel 31 close to the first connection 512, thereby increasing the region of the first inter-plate channel 31 for smooth flow of the fluid, improving the distribution uniformity of the fluid in the first inter-plate channel 31, and facilitating the improvement of the heat exchange effect of the heat exchanger 10.

It is understood that other areas of the first plate interspaces 31 refer to other areas of the first plate interspaces 31 than the area adjacent the first connection 512 of the first recess 51; fluid can flow from the first connection of the first recess 51 to the first connection of the corresponding first recess of the opposite plate, wherein the corresponding first recess means that, in the plate stacking direction, the projection of the first recess of one adjacent plate on the first plane has an overlapping portion with the projection of the corresponding first recess of the other adjacent plate on the first plane.

In some embodiments, referring to fig. 8, the tops of the first protrusions 41 of the same plate 20 are located at the same height, and the tops of the second protrusions 42 of the same plate 20 are located at the same height, which is beneficial to increase the supporting area between each two adjacent plates 20, thereby improving the structural strength of the heat exchange core. The length of the first overlap area 5121 in the first direction is greater than or equal to 0.25L1 and less than or equal to 0.987L1, so that on one hand, the flow area of the fluid flowing from the second connection of the first concave portion 51 to the second connection of the first concave portion of the opposite plate is prevented from being too small, and therefore, the uniformity of distribution of the fluid in the first plate-to-plate channels 31 is finally improved, which is beneficial to improving the heat exchange effect of the heat exchanger 10, and on the other hand, the assembly accuracy between the plates 20 is reduced on the basis of ensuring that the distribution of the fluid in the first plate-to-plate channels 31 has better uniformity, and therefore, the process cost of the heat exchanger is reduced.

Referring to fig. 17, at least a portion of the first recess 51 near the first connection 512 and a portion of the first recess 51 near the first connection of the opposite plate have a communication area 5122, an included angle C between the first extension 511 and the second extension 513 is defined, the size of the communication area 5122 decreases with the decrease of the included angle C, when the included angle C decreases, in order to avoid that the flow resistance of the area of the first inter-plate channel 31 near the first connection 512 is too large due to too small communication area, the length of the first overlapping area 5121 in the first direction should be increased, and when the included angle C decreases, the length of the first overlapping area 5121 in the first direction should be 127 degrees<C<170 deg., the length of the first overlapped area 5121 in the first direction is greater than or equal to

The length of the first overlap zone 5121 in the first direction is L2 shown in fig. 17; when the angle C is more than or equal to 93 degrees and less than or equal to 127 degrees, the length of the first overlapping area 5121 along the first direction is more than or equal to

When 20 degree<C<93 deg., the length of the first overlap zone 5121 in the first direction is greater than or equal to

Thereby avoiding the communication area from being too small and avoiding the passage between the first plates31, the flow resistance of the area close to the first connection point 512 is too large, and finally the heat exchange effect of the heat exchanger is ensured.

With reference to fig. 9, 13 and 15, defining that the area of the cross section perpendicular to the extension direction of the first extension 511 of the first recess 51 is S1, and the area of the cross section perpendicular to the extension direction of the second extension of the first recess 51 is the same as the area S1, it can be understood that the flow cross-sectional area of the fluid flowing partially along the first extension of the first recess 51 is S1; defining the cross-section perpendicular to the extension of the first extension 513 of the second recess 52 as S3, it will be understood that the cross-sectional flow area of the fluid flowing partially along the first extension of the second recess 52 is S3; the area S1 is smaller than the area S3, on the basis that, when the area S1 is increased, more fluid flows along the first and second extensions of the first recess 51, resulting in more fluid being collected in the area of the first recess 51 near the first connection 512, and if the length of the first overlap 5121 in the first direction is too small, it is likely to result in an excessive flow resistance in the area of the first interplate passages 31 near the first connection 512. When S1>3.3mm ² When, the length of the first overlap area 5121 in the first direction is greater than or equal to

When the diameter is 1.2mm ² ≤S1≤3.3mm ² When, the length of the first overlap area 5121 in the first direction is greater than or equal to

When S1<1.2mm ² When, the length of the first overlap area 5121 in the first direction is greater than or equal to

Therefore, the length of the first overlapping area 5121 in the first direction is prevented from being too small, the flow resistance of the area of the first interplate channel 31 close to the first connection point 512 is reduced, and the heat exchange effect of the heat exchanger is finally ensured.

In some embodiments, referring to fig. 9, at least part of the plates 20 comprises a plurality of third recesses 53, the third recesses 53 being located between two adjacent first recesses 51 of the same plate; referring to fig. 15, the third recess 53 is located on the second face 27, the third recess 53 includes a second connection 515, a third extension 514 and a fourth extension 516, the third extension 514 and the fourth extension 516 are located on both sides of the second connection 515, the third extension 514 and the fourth extension 516 are connected at the second connection 515, the third extension 514 extends in the same direction as the first extension 511 of the same plate, the fourth extension 516 extends in the same direction as the second extension 513 of the same plate, the first connection 512 is at least partially aligned with the second connection 515 in the first direction, the third extension 514 and the fourth extension 516 are V-shaped concave, the concave direction of the third recess 53 is the same as the concave direction of the first recess 51, and referring to fig. 5 and 15, the area of a cross section of the third extension 514 of the third recess 53 perpendicular to the extending direction thereof is defined as S2, the area of the cross section of the fourth extension 516 of the third recess 53 perpendicular to the extending direction thereof is the same as the area S2, the area S2 is smaller than the area S1, the capacity of the third recess 53 is smaller than the capacity of the first recess 51, the area of the cross section of the first extension of the second recess 52 perpendicular to the extending direction thereof is larger than the sum of the areas S1 and S2, the area of the cross section of the second extension of the second recess 52 perpendicular to the direction of extension thereof is greater than the sum of the areas of the area S1 and the area S2, a large part of the fluid located in the first plate interspaces 31 tends to circulate in the first recesses 51, the contact area of the fluid flowing through the first plate-to-plate channels 31 with the plates 20 is increased, the effective heat exchange area of the plates 20 is increased, thereby improving the heat exchange between the fluid of the first plate interspaces 31 and the other fluid of the second plate interspaces 32.

Referring to fig. 18, two third recesses 53 are located between two adjacent first recesses 51 of the same plate, and the area S2 is smaller than one-half of the area S1, and by providing two third recesses 53 between the adjacent first recesses 51 of the same plate, the effective heat exchange area of the plate 20 is further increased, and thus the heat exchange effect of the heat exchanger is improved.

In some embodiments, referring to fig. 16, at least a portion of sheet 20 is provided with a first zone 61, a second zone 62, and a third zone 63, the first zone 61, the second zone 62, and the third zone 63 are arranged along a first direction, the second zone 62 is located between the first zone 61 and the third zone 63, the first zone 61 includes two corner holes, the third zone 63 includes two corner holes, specifically, the first zone 61 includes a first corner hole 23 and a fourth corner hole 26, and the third zone 63 includes a second corner hole 24 and a third corner hole 25; the second area 62 is a main heat exchange area, and part of the first concave portion 51 and the second concave portion 52 are located in the second area 62, so that the turbulent flow effect of the second area 62 of the plate 20 on the fluid is improved, and the heat exchange effect between different fluids is enhanced; another part of the first concave parts 51 and the second concave parts 52 are located in the first region 61, and another part of the first concave parts 51 and the second concave parts 52 are located in the third region 63, so that the flow disturbing effect of the plate parts of the first region 61 and the third region 63 on the fluid is improved, and the heat exchange effect between the two fluids in the two side plate-to-plate channels of the plate 20 is further improved.

It is understood that the structures of the first plurality of concave portions 51 and the second plurality of concave portions 52 located in the first region 61 and the third region may be similar to or the same as the structures of the first plurality of concave portions 51 and the second plurality of concave portions 52 located in the second region 62, and the structures may also be different, for example, the included angle C or the distance L1 or the area S1 are different, for example, the third concave portion 53 is located between two adjacent first concave portions 51 of the second region 62, and the third concave portion 53 is not located between two adjacent first concave portions 51 of the first region 61 and/or the third region 63.

In some embodiments, referring to fig. 8, define E as the ratio of the area S1 to the area S3 located in the first and/or third zone; referring to FIG. 9, F is defined as the ratio of the area S1 to the area S3 in the second zone, wherein: e < F; the second zone of the plate 20 is a main heat exchange zone, the first zone 61 and the third zone 63 of the plate 20 are general heat exchange zones, and by setting E < F, the value of E is prevented from being too large, so that the area S1 in the first zone and/or the third zone is prevented from being too small compared with the area S3, so that the flow area of the fluid flowing along the first concave 51 in the first zone and/or the third zone is prevented from being too small, the flow resistance of the first zone 61 and/or the third zone 63 is reduced, the uniform distribution of the fluid in the first zone 61 and/or the third zone 63 is facilitated, and the uniform distribution of the fluid in the second zone 62 is facilitated, so that the heat exchange effect between the fluid in the second zone 62 and another fluid is improved.

In some embodiments, along the stacking direction of the plurality of plates 20, the projection of the first junction 512 of at least a part of the first concave 51 of the first plate 21 in the first region 61 and/or the third region 63 on the first surface and the projection of the first concave of the second plate 22 on the first surface have a third overlapping region, which is similar to the first overlapping region 5121 in fig. 17 and will not be specifically described here; the length of the third overlapping area in the first direction is greater than or equal to 0.7mm and less than or equal to L1, and 2.2mm < L1<15.1mm, so as to avoid that the flow area of the fluid flowing from the first connection 512 of the first recess 51 of the first plate 21 to the second connection of the first recess of the second plate 22 is too small, so as to avoid that the flow resistance of the area of the first inter-plate channel 31 near the first connection 512 is too large compared with the flow resistance of other areas of the first inter-plate channel 31, so as to improve the uniformity of distribution of the fluid in the area of the first inter-plate channel 31 near the first zone 61 and/or the third zone 63, so as to improve the heat exchange effect of the fluid between the first zone 61 and/or the third zone 63 and another fluid, and further improve the heat exchange effect of the heat exchanger 10.

Along the stacking direction of the plurality of plates 20, the projection of the first connection point 512 of at least part of the first concave part 51 of the first plate 21, which is positioned in the first area 61 and the third area 63, on the first surface and the projection of the first concave part of the second plate 22 on the first surface have a third overlapping area, the length of the third overlapping area along the first direction is greater than or equal to 0.7mm and less than or equal to 14.9mm, and the assembly precision among the plates 20 is reduced on the basis of ensuring that the distribution of the fluid in the first plate-to-plate channel 31 close to the first area 61 and the third area 63 has better uniformity, so that the process cost of the heat exchanger is reduced.

In some embodiments, referring to fig. 19-20, the first recess 51 includes a third junction 517 and a fifth extension 518, the second extension 513 and the fifth extension 518 being joined at the third junction 517, the second extension 513 and the fifth extension 518 having an included angle of less than 180 °; along the stacking direction of the plurality of sheets 20, the projection of the third junction 517 of the first concave part 51 of the first sheet 21 on the first surface and the first concave part of the second sheet 22 on the first surfaceThe projection of one face has a second overlap region, which is understood to be similar to the first overlap region 5121 in fig. 17 and will not be described in detail herein; the length of the second overlapping region along the first direction is greater than or equal to

And is less than or equal to L1, so as to avoid that the flow area of the fluid flowing from the third joint 517 of the first recess 51 of the first plate 21 to the third joint of the first recess of the second plate 22 is too small, and avoid that the flow resistance of the region of the first inter-plate channel 31 close to the third joint 517 is too large compared with the flow resistance of other regions of the first inter-plate channel 31, thereby increasing the region of the first inter-plate channel 31 for smooth flow of the fluid, so as to improve the uniform distribution of the fluid in the first inter-plate channel 31, and thus being beneficial to improving the heat exchange effect of the heat exchanger.

It will be understood that the first recess 51 and the second recess 52 may also each comprise a sixth extension, a fourth junction, etc., i.e. the first recess 51 and the second recess 52 are each a multiple V-shaped depression; the first recess 51 and the second recess 52 are V-shaped, N-shaped, W-shaped, or the like.

It should be noted that: the above embodiments are only used for illustrating the present invention and not for limiting the technical solutions described in the present invention, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solutions and modifications thereof without departing from the spirit and scope of the present invention can be modified or replaced by other technical solutions and modifications by those skilled in the art.

Claims (10)

1. A heat exchanger is characterized by comprising a heat exchange core body, wherein the heat exchange core body comprises a plurality of stacked plates, the heat exchange core body comprises interplate channels, the interplate channels comprise first interplate channels and second interplate channels, at least part of the plates comprise a plurality of first concave parts, the first concave parts are arranged along a first direction, and each first concave part comprises a first connecting part and a first extending partThe first extending section and the second extending section are positioned on two sides of the first connecting position, the first extending section and the second extending section are connected at the first connecting position, the distance between the first concave part of the same plate and the first concave part adjacent to the first concave part is L1, one of the two adjacent plates is defined as a first plate, the other plate is defined as a second plate, the first extending section and the second extending section of the first plate are positioned on one side of the corresponding first connecting position along the first direction, the first extending section and the second extending section of the second plate are positioned on the other side of the corresponding first connecting position, the first concave part of the first plate is opened towards the second plate, the first concave part of the second plate is opened towards the first plate, a first surface is defined, and the first surface is perpendicular to the laminating direction of the plates, along the lamination direction of the plates, the projection of the first connection position of the first concave part of the first plate on the first surface and the projection of the first concave part of the second plate on the first surface have a first overlapping area, and along the first direction, the length of the first overlapping area is greater than or equal to that of the first overlapping area

And L1 or less.

2. The heat exchanger of claim 1, wherein: at least part of the plate sheet comprises a plurality of second recesses, the first recesses and the second recesses are alternately distributed along a first direction, the plate sheet is provided with a second face and a third face, the first recesses are positioned on the second face, the second recesses are positioned on the third face, the first recesses and the second recesses respectively comprise a first connecting part, a first extending section and a second extending section, the area of a cross section, perpendicular to the extending direction, of the first extending section of the first recess is defined as S1, the area of a cross section, perpendicular to the extending direction, of the second extending section of the first recess is defined as S1, the area of a cross section, perpendicular to the extending direction, of the first extending section of the second recess is greater than S1, and the area of a cross section, perpendicular to the extending direction, of the second extending section of the second recess is greater than S1.

3. The heat exchanger of claim 2, wherein: the length of the first overlapping area along the first direction is less than or equal to 0.987L 1.

4. The heat exchanger according to any one of claims 1 to 3, wherein: an included angle between the first extension section and the second extension section is defined as C when the included angle is 127 DEG<C<170 DEG, the length of the first overlapping area along the first direction is more than or equal to

When 93 DEG-C127 DEG, the length of the first overlapping region in the first direction is equal to or greater than

When 20 degree<C<93 DEG, the length of the first overlapping area along the first direction is more than or equal to

5. The heat exchanger of any one of claims 1 to 3, wherein: the area of the cross section perpendicular to the extending direction of the first extending section of the first concave part is defined as S1, the area of the cross section perpendicular to the extending direction of the second extending section of the first concave part is the same as the area S1, when S1>3.3mm ² The length of the first overlapping area along the first direction is more than or equal to

When the diameter is 1.2mm ² ≤S1≤3.3mm ² When the length of the first overlapping area along the first direction is larger than or equal to

When S1<1.2mm ² The length of the first overlapping area along the first direction is more than or equal to

6. The heat exchanger of claim 5, wherein: at least part of the plates comprise a plurality of second recesses and a plurality of third recesses, the first recesses and the second recesses are alternately distributed along a first direction, the plates have a second face and a third face, the first recesses are located on the second face, the third recesses are located on the second face, the second recesses are located on the third face, the second recesses comprise a first connection, a first extension and a second extension, the third recesses are located between two adjacent first recesses of the same plate, the third recesses comprise a second connection, a third extension and a fourth extension, the third extension and the fourth extension are located on two sides of the second connection, the third extension and the fourth extension are connected at the second connection, and the extension direction of the third extension is the same as the extension direction of the first extension of the same plate, the extending direction of the fourth extending section is the same as the extending direction of the second extending section of the same plate, the first connecting position and the second connecting position are at least partially aligned along the first direction, the area of the cross section, perpendicular to the extending direction, of the third extending section of the third concave part is defined as S2, the area of the cross section, perpendicular to the extending direction, of the fourth extending section of the third concave part is the same as the area S2, the area S2 is smaller than the area S1, the area of the cross section, perpendicular to the extending direction, of the first extending section of the second concave part is larger than the sum of the areas S1 and S2, and the area of the cross section, perpendicular to the extending direction, of the second extending section of the second concave part is larger than the sum of the areas S1 and S2.

7. The heat exchanger of claim 6, wherein: two third recesses are located between two adjacent first recesses of the same plate, and the area S2 is smaller than one half of the area S1.

8. The heat exchanger of any of claims 1-3 or 6-7, wherein: the first concave part comprises a third connection part and a fifth extension part, the second extension part is connected with the fifth extension part at the third connection part, an included angle smaller than 180 degrees is formed between the second extension part and the fifth extension part, along the plate stacking direction, the projection of the first surface of the third connection part of the first concave part of the first plate and the projection of the first concave part of the second plate on the first surface have a second overlapping area, and the length of the second overlapping area along the first direction is larger than or equal to that of the second overlapping area

And L1 or less.

9. The heat exchanger of any of claims 1-3 or 6-7, wherein: at least part of the plate sheets are provided with a first area, a second area and a third area, the first area, the second area and the third area are arranged along the first direction, the second zone is located between the first zone and the third zone, the first zone comprising two corner holes, the third area comprises two corner holes, part of the first concave parts are positioned in the second area, the other part of the first concave parts are positioned in the first area, the other part of the first concave parts are positioned in the third area, and the third area is positioned along the lamination direction of the plates, a first junction of at least part of the first recess of the first plate located in the first region and/or the third region has a third overlapping region in a projection of the first face with a projection of the first recess of the second plate in the first face, the length of the third overlapping region along the first direction is greater than or equal to 0.7mm and less than or equal to L1, 2.2mm < L1<15.1 mm.

10. The heat exchanger of claim 9, wherein: along the plate stacking direction, a projection of a first surface of a first connection position of at least part of first concave parts of the first plate, which are positioned in the first area and the third area, and a projection of a first concave part of the second plate, which is positioned in the first area and the third area, on the first surface have a third overlapping area, and the length of the third overlapping area along the first direction is greater than or equal to 0.7mm and less than or equal to 14.9 mm.

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