CN215893353U - Heat exchanger - Google Patents

Abstract

The utility model provides a heat exchanger, including heat exchange core and drainage subassembly, the heat exchange core is including a plurality of heat exchange plate pieces of range upon range of setting, the heat exchange plate piece has first angular hole, a plurality of first angular hole at least part align along heat exchange plate piece's range upon range of direction and form first angular hole passageway, the drainage subassembly is located one side of heat exchange core, the drainage subassembly includes drainage channel and respectively with first mouthful and the second mouth of drainage channel's both ends intercommunication, length direction along the heat exchange core, the heat exchange core has first end and second end, first mouthful and second mouth all are close to first end, first mouthful and first angular hole passageway intercommunication, a face of definition perpendicular to heat exchange plate piece's range upon range of direction is first face, the orthographic projection of second mouth in first face does not have coincidence portion or partial coincidence with the heat exchange core in the orthographic projection of first face. This application is through being close to the same one end of heat transfer core with first mouthful and second mouth, shortens drainage channel's length to reduce drainage channel's pressure drop, promote the heat transfer performance of 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 in the related art comprises a heat exchange core body, a fluid inlet and a fluid outlet, wherein when the fluid inlet or the fluid outlet is positioned on the outer side of the covering surface of the heat exchange core body, the fluid inlet or the fluid outlet is usually arranged on a drainage plate in a mode of arranging the drainage plate, and heat exchange fluid in the heat exchange core body is guided to the fluid outlet of the drainage plate or the heat exchange fluid in the fluid outlet of the drainage plate is guided to the heat exchange core body, wherein the drainage plate is provided with a drainage channel for communicating the heat exchange core body and the fluid inlet or the fluid outlet of the drainage plate, when the fluid outlet of the drainage plate is positioned on the outer side of the covering surface of the heat exchange core body, the length of the drainage channel is usually longer, the pressure drop of the drainage channel is larger, and the heat exchange performance is influenced.

SUMMERY OF THE UTILITY MODEL

An object of this application is to provide a heat exchanger, reduces the pressure drop of heat exchanger, promotes heat transfer performance.

In order to achieve the purpose, the following technical scheme is adopted in the application:

a heat exchanger comprises a heat exchange core body, wherein the heat exchange core body comprises a plurality of heat exchange plate sheets which are arranged in a stacked mode, a heat exchange channel is arranged between every two adjacent heat exchange plate sheets, each heat exchange plate sheet is provided with a first corner hole, the first corner holes of the plurality of heat exchange plate sheets are at least partially aligned along the stacking direction of the heat exchange plate sheets to form a first corner hole channel,

the heat exchange core body is provided with a first side and a second side along the stacking direction of the heat exchange plate sheets, the heat exchanger further comprises a flow guiding assembly, the flow guiding assembly is located on the second side of the heat exchange core body, the flow guiding assembly comprises a flow guiding channel and a first port and a second port which are respectively communicated with two ends of the flow guiding channel, the heat exchange core body is provided with a first end and a second end along the length direction of the heat exchange core body, and the first port and the second port are close to the first end;

the first port is communicated with the first angular hole channel and defines a first surface, the first surface is perpendicular to the stacking direction of the heat exchange plates, and the orthographic projection of the second port on the first surface does not have an overlapping part or a part overlapping with the orthographic projection of the heat exchange core on the first surface.

In this application, the drainage subassembly sets up drainage channel and first mouthful and the second mouth with drainage channel intercommunication, first mouthful and the first corner hole passageway intercommunication of heat transfer core, the orthographic projection of second mouth in first face does not have coincidence portion or partial coincidence with the orthographic projection of heat transfer core in first face, thereby pass through drainage channel water conservancy diversion to second mouth or with the heat transfer medium water conservancy diversion of second mouth to first corner hole passageway with the heat transfer medium in the first corner hole passageway, and first mouthful and the first end of heat transfer core all are close to with the second mouth, first mouthful and second mouth set up the same one end near heat transfer core length direction promptly, thereby shorten drainage channel's length, reduce drainage channel's pressure drop, promote the heat transfer performance of heat exchanger.

Drawings

FIG. 1 is a schematic perspective view of a first embodiment of a heat exchanger according to the present application;

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

FIG. 3 is a side view of the heat exchanger of FIG. 1;

FIG. 4 is a schematic cross-sectional view taken along the line A-A in FIG. 3;

FIG. 5 is a schematic cross-sectional view taken along the line B-B in FIG. 3;

FIG. 6 is a schematic perspective view of a second embodiment of a heat exchanger according to the present application;

FIG. 7 is an exploded view of the heat exchanger of FIG. 6;

FIG. 8 is a side view of the heat exchanger of FIG. 6;

FIG. 9 is a schematic cross-sectional view taken along the line C-C in FIG. 8;

FIG. 10 is a schematic side view of a third embodiment of the heat exchanger of the present application;

FIG. 11 is a schematic cross-sectional view taken along line D-D of FIG. 10;

fig. 12 is a schematic cross-sectional view taken along the direction E-E in fig. 10.

Detailed Description

The utility model will be further described with reference to the following figures and specific examples:

referring to fig. 1 to 12, the present application provides a heat exchanger 10, including a heat exchange core 1, where the heat exchange core 1 includes a plurality of heat exchange plates 11 arranged in a stacked manner, and heat exchange channels are provided between adjacent heat exchange plates 11, where the heat exchange channels include at least a first heat exchange channel 12 and a second heat exchange channel that are not communicated with each other, the first heat exchange channel 12 is used for flowing one medium, such as a refrigerant, and the second heat exchange channel is used for flowing another medium, such as a cooling liquid, and of course, when the heat exchanger 10 is used as an intermediate heat exchanger 10, the first heat exchange channel 12 and the second heat exchange channel can be used for flowing the same medium at different temperatures.

As shown in fig. 5 and 12, the direction H is the stacking direction of the heat exchange plates, and the direction L is the longitudinal direction of the heat exchanger.

As shown in fig. 1-12, the heat exchanger plate 11 has a first angular hole 111, the first angular holes 111 of a plurality of heat exchanger plates 11 are at least partially aligned in the stacking direction of the heat exchanger plates 11 to form a first angular hole channel 13, the first angular hole channel 13 can be used as an inlet channel or an outlet channel of a medium, along the stacking direction of the heat exchanger plates 11, the heat exchanger core 1 has a first side and a second side, as shown in fig. 5, the upper side is the first side of the heat exchanger core, the lower side is the second side of the heat exchanger core, the opening of the first angular hole channel 13 is close to the second side of the heat exchanger core 1, the flow directing assembly 2 is located at the second side of the heat exchanger core 1, the flow directing assembly 2 includes a flow directing channel 221 and a first port 222 and a second port 223 respectively communicated with both ends of the flow directing channel 221, the first port 222 is communicated with the opening of the first angular hole channel 13, along the length direction of the heat exchanger core 1, the heat exchange core 1 has a first end and a second end, the first port 222 and the second port 223 are both close to the first end of the heat exchange core 1, that is, along the length direction of the heat exchanger 10, the distance between the first port 222 and the first end of the heat exchange core 1 is smaller than the distance between the first port 222 and the second end of the heat exchange core 1, the distance between the second port 223 and the first end of the heat exchange core 1 is smaller than the distance between the second port 223 and the second end of the heat exchange core 1, a surface perpendicular to the stacking direction of the heat exchange plates 11 is defined as a first surface, an orthographic projection of the second port 223 on the first surface and an orthographic projection of the heat exchange core 1 on the first surface do not have an overlapping portion or a partial overlapping portion, that is, the second port 223 is at least partially located outside the covering surface of the heat exchange core 1. The flow guide assembly 2 is provided with a flow guide channel 221, a first port 222 and a second port 223 which are communicated with the flow guide channel 221, the first port 221 is communicated with a first angular hole channel 13 of the heat exchange core body 1, the orthographic projection of the second port 223 on the first surface does not have a superposition part or a partial superposition with the orthographic projection of the heat exchange core body 1 on the first surface, so that a heat exchange medium in the first angular hole channel 13 is guided to the second port 223 through the flow guide channel 221 or the heat exchange medium in the second port 223 is guided to the first angular hole channel 13, and the first port 222 and the second port 223 are both close to the first end of the heat exchange core body 1, namely the first port 222 and the second port 223 are arranged at the same end close to the length direction of the heat exchange core body 1, so that the length of the flow guide channel 221 is shortened, the pressure drop of the flow guide channel 221 is reduced, and the heat exchange performance of the heat exchanger 10 is improved.

As shown in fig. 4, 9 and 11, the orthographic projection of the second port 223 of the flow guiding assembly 2 on the first surface does not have an overlapping part with the orthographic projection of the heat exchange core 1 on the first surface, that is, the whole second port 223 is located outside the covering surface of the heat exchange core 1, the flow guiding assembly 2 has a first side part facing the heat exchange core 1 and a second side part far away from the heat exchange core 1, as shown in fig. 4, 9 and 11, the second port 223 is arranged on the second side part of the flow guiding assembly 2, and of course, the second port 223 may also be arranged on the first side part of the flow guiding assembly 2.

As shown in fig. 3 and 10, a drainage channel 221 of the drainage assembly 2 is shown by a dotted line, wherein the length of the drainage channel 221 is not greater than the length of the heat exchange core 1, the extending direction of the drainage channel 221 extends substantially along the width direction of the heat exchanger 10, wherein the drainage channel 221 may be a straight channel, or may also be a curved channel or an irregular shape, etc., as shown in fig. 3 and 8, the length of the drainage channel 221 is not greater than two thirds of the length of the heat exchange core 1, as shown in fig. 10, the length of the drainage channel 221 is shorter, and the length of the drainage channel 221 is not greater than half of the length of the heat exchange core 1.

As shown in fig. 3, 8, and 10, an orthographic projection of the heat exchange core 1 on the first surface is at least partially located outside an orthographic projection of the flow guiding assembly 2 on the first surface, that is, the flow guiding assembly 2 covers part of the heat exchange core 1, an orthographic projection area of the heat exchange core 1 on the first surface is defined as S1, that is, an area of a covering surface of the heat exchange core 1 is defined as S1, an overlapping area of the orthographic projection of the heat exchange core 1 on the first surface and the orthographic projection of the flow guiding assembly 2 on the first surface is defined as S2, that is, an area of the flow guiding assembly 2 covering the heat exchange core 1 is defined as S2, wherein S2 is greater than or equal to 0.2S1 and less than or equal to 0.6S1, and by controlling a relationship between the area of the covering surface of the heat exchange core 1 and the area of the flow guiding assembly 2 covering the heat exchange core 1, the size of the flow guiding assembly 2 is controlled, and the weight and the cost of the heat exchanger 10 are reduced.

As shown in fig. 1-9, the first angular hole channel 13 has a first sub-channel 131 and a second sub-channel 132 arranged along the stacking direction of the heat exchange plate 11, the first sub-channel 131 is not directly communicated with the second sub-channel 132, as shown in fig. 4, 5 and 9, the first sub-channel 131 is close to the first side of the heat exchange core 1, the second sub-channel 132 is close to the second side of the heat exchange core 1, and the first port 222 is communicated with the second sub-channel 132, wherein the first sub-channel 131 is used as an inlet channel of a heat exchange medium and the second sub-channel 132 is used as an outlet channel of the heat exchange medium, or the first sub-channel 131 is used as an outlet channel of a heat exchange medium and the second sub-channel 132 is used as an inlet channel of the heat exchange medium, so that the inlet and the outlet of the same medium are both located in the same angular hole channel. As shown in fig. 5, the heat exchange core 1 includes a second corner hole channel 14, the second corner hole channel 14 is close to the second end of the heat exchanger 10, the first heat exchange channel 12 includes a first sub heat exchange channel 121 and a second sub heat exchange channel 122, the first sub heat exchange channel 121 communicates the first sub channel 131 with the second corner hole channel 14, the second sub heat exchange channel 122 communicates the second corner hole channel 14 with a second sub channel 132 located outside the draft tube 27, and two passes of the heat exchange medium are realized through the communication relationship of the first sub channel 131, the second corner hole channel 14 and the second sub channel 132.

As shown in fig. 4, 5 and 9, the flow guiding assembly 2 further includes a flow guiding tube 27, the flow guiding tube 27 penetrates through the flow guiding channel 221 and the second sub-channel 132 along the stacking direction of the heat exchange plates, one port of the flow guiding tube 27 is communicated with the first sub-channel 131, the first port 222 is communicated with the second sub-channel 132 located outside the flow guiding tube 27, the flow guiding assembly has a first side portion and a second side portion, the first side portion and the second side portion of the flow guiding assembly are located on opposite sides of the flow guiding assembly along the stacking direction of the heat exchange plates, the first side portion of the flow guiding assembly is close to the heat exchange core body, the second side portion of the flow guiding assembly is far away from the heat exchange core body relative to the first side portion of the flow guiding assembly, the flow guiding assembly 2 further includes a third port 28, the third port 28 and the second port 223 are both located on the second side portion of the flow guiding assembly 2, the first port 222 is located on the first side portion of the flow guiding assembly 2, as shown in fig. 4 and 5, the third port 28 is communicated with the other port of the flow guiding tube 27, alternatively, as shown in fig. 9, the other port of the flow guide assembly 27 serves as the third port 28, so that the third port 28 and the second port 223 are both distributed at the first end of the heat exchanger 10 for fluid communication with other assemblies, and the fluid inlet and the fluid outlet of the heat exchange core 1, i.e. the first port 222 and the third port 28, share the first angular hole, so that the distance between the first port 222 and the second port 223 is shortened, so that the length of the flow guide channel 221 is shortened, the pressure drop of the flow guide channel 221 is reduced, and the heat exchange performance of the heat exchanger 10 is improved.

As shown in fig. 10-12, the heat exchange core 1 comprises a first corner hole channel 13, a second corner hole channel 14 and a third corner hole channel 15, the first corner hole channel 13, the second corner hole channel 14 and the third corner hole channel 15 are used for circulating the same heat exchange medium, the first corner hole channel 13 and the third corner hole channel 15 are both close to the first end of the heat exchange core 1, the second corner hole channel 14 is close to the second end of the heat exchange core 1, the first heat exchange channel 12 comprises a first sub heat exchange channel 121 and a second sub heat exchange channel 122, the first sub heat exchange channel 121 is communicated with the first corner hole channel 13 and the second corner hole channel 14, the second sub heat exchange channel 122 is communicated with the second corner hole channel 14 and the third corner hole channel 15, the heat exchange core 1 comprises an end plate 17 close to the flow guiding assembly 2, the end plate 17 is provided with a fourth port 16 communicated with the third corner hole channel 15, when the fourth port 16 is a fluid inlet, the heat exchange medium flows into the third corner hole channel 15 through the fourth port 16, as shown in fig. 12, the third angular hole channel 15 is communicated with a part of the heat exchange channel 12 close to the first side of the heat exchange core 1, the part of the heat exchange channel 12 is a second sub heat exchange channel 122, the heat exchange medium flows through the second sub heat exchange channel 122 and then flows into the second angular hole channel 14, and further flows into a part of the heat exchange channel 12 close to the second side of the heat exchange core 1, that is, the first sub heat exchange channel 121 flows towards the first angular hole channel 13, as shown in fig. 11, the first angular hole channel 13 is communicated with the first sub heat exchange channel 121 close to the second side of the heat exchange core 1, and is not communicated with the second sub heat exchange channel 122 close to the first side of the heat exchange core 1, and the heat exchange medium in the first angular hole channel 13 flows into the diversion channel 221 through the first port 222 of the diversion assembly 2 and flows out from the second port 223. Of course, the second port 223 may serve as an inlet for the heat exchange medium, and the fourth port 16 may serve as an outlet for the heat exchange medium. As shown in fig. 10, the orthographic projection of the fourth port 16 on the first surface does not have an overlapping portion with the orthographic projection of the flow guiding assembly 2 on the first surface, and the position of the fourth port 16 is changed by changing the communication relation of the angular hole channels, so that the fourth port 16 and the first port 222 are located in different angular hole channels, and the fourth port 16 is arranged on the heat exchange core body 1, thereby simplifying the structure of the flow guiding assembly 2, reducing the size of the flow guiding assembly 2, and further reducing the weight and the cost of the heat exchanger 10.

As shown in fig. 10-12, the first port 222 is closer to the second port 223 than the fourth port 16, so as to further reduce the length of the drainage channel 221 and the pressure drop of the drainage channel 221, but of course, the fourth port 16 may be closer to the second port 223 than the first port 222, and the communication relationship of the corner hole channels may be adjusted according to the position of the connectable port.

As shown in fig. 2, 4, 7 and 9, the flow guiding assembly 2 includes a flow plate 22 and a first plate 21 located between the heat exchange core 1 and the flow plate 22, wherein the flow plate 22 may be provided with a channel penetrating the flow plate 22 in the stacking direction of the heat exchange plates, the first plate 21 covers the channel of the flow plate 22, the first port 222 is provided in the first plate 21, the first port 222 communicates with the flow guiding channel 221 and the second sub-channel 132, the drainage pipe 27 communicates with the first angular hole channel 13 through the first port 222 and the second angular hole channel 14, the bottom of the flow plate 22 may be provided with other plates covering the channel of the flow plate 22, such as a mounting plate, etc., the channel, the first plate and the mounting plate enclose the flow guiding channel 221, of course, the flow plate 22 may also be provided with a groove with one side open, and the groove and the other plates enclose the flow guiding channel 221, such as the first plate 21.

As shown in fig. 2, 4 and 5, the flow guiding assembly 2 comprises a mounting plate 26 and a flow plate 22, the mounting plate 26 has a first side facing the heat exchange core 1 and a second side far away from the heat exchange core 1, the flow plate 22 is close to the first side of the mounting plate 26, the flow guiding pipe 27 has a first port communicating with the first sub-passage 131 and a second port far away from the first sub-passage 131, the second port of the flow guiding pipe 27 has a first flange 271, the flow guiding assembly 2 further comprises a second plate 23, the second plate 23 is located between the mounting plate 26 and the flow plate 22, the first flange 271 is located between the second plate 23 and the mounting plate 26, wherein, the flange 3 can be arranged at the inner side of the first flanging 271, the mounting plate 26 and the second plate 23 clamp the first flanging 271 of the drainage tube 27, so that the mounting structure of the drainage tube 27 is more reliable, and the risk of the heat exchange medium in the drainage channel 221 leaking out along the outside of the drainage tube 27 is reduced.

As shown in fig. 7 and 9, the flow guiding assembly 2 includes a first plate 21, a flow plate 22, a sealing plate 24, a pad 2525 and a mounting plate 26, the first plate 21 is provided with a first port 222, the flow plate 22 is provided with a channel penetrating the flow plate 22 in the stacking direction of the heat exchange plate sheets 11, the sealing plate 24, the pad 2525 and the mounting plate 26 are all provided with a through hole, the flow guiding tube 27 penetrates the through holes of the sealing plate 24, the pad 25 and the mounting plate 26 and the first port 222 of the first plate 21 to communicate with a first sub-passage 131, the first port 222 outside the flow guiding tube 27 communicates with the flow guiding passage 221 and a second sub-passage 132, wherein the sealing plate 24, the pad 25 and the mounting plate 26 may be combined into one plate, the flow guiding tube 27 has a first port communicating with the first sub-passage 131 and a second port remote from the first sub-passage 131, the second port of the flow guiding tube 27 has a first flange 271, the first flange 271 is near a second side of the mounting plate 26, the first flanging 271 of the drainage tube 27 clamped by the second plate 23 is not needed, and the number of plates of the drainage assembly 2 is reduced.

As shown in fig. 9, the drainage assembly 2 further includes two sealing members 4, the mounting plate 26 is provided with a hole for embedding the sealing member 4, one side of the sealing member 4 away from the heat exchange core 1 is provided with a mounting groove 41 for mounting a sealing ring 42, the sealing ring 42 protrudes out of the side surface of the sealing member 4, the middle of one sealing member 4 is provided with a hole for penetrating through the drainage tube 27, the middle of the other sealing member 4 is provided with a hole for penetrating through the connection tube 5 communicated with the drainage channel 221, namely, one port of the connection tube 5 is the second port 223, the backing plate 25 mainly plays a role of supporting the sealing member 4, and the setting of the backing plate 25 prevents the heat exchange medium in the drainage channel 221 from leaking along the periphery of the sealing member 4, the sealing plate 24 is provided with a second flange 241 extending into the inner wall of the connection tube 5, and the sealing plate 24 plays a role of positioning the connection tube 5 and preventing the heat exchange medium in the drainage channel 221 from leaking along the outer wall of the connection tube 5.

Of course, the sealing element 4 may not be separately disposed, as shown in fig. 5 and 11, a mounting groove 41 is disposed on the second side portion of the mounting plate 26, a sealing ring 42 is disposed in the mounting groove 41, the sealing ring 42 protrudes out of the second side portion of the mounting plate 26, the mounting groove 41 is disposed around the second port or the second port 223 of the drainage tube 27, and the sealing ring 42 is disposed to prevent a fluid inlet or a fluid outlet on the second side portion of the drainage assembly 2 from leaking, so as to improve the sealing performance of the drainage assembly 2.

It should be noted that: although the present invention has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the present invention may be modified and equivalents may be substituted for those skilled in the art, and all technical solutions and modifications that do not depart from the spirit and scope of the present invention should be covered by the claims of the present invention.

Claims (11)

1. The utility model provides a heat exchanger, includes the heat exchange core body, the heat exchange core body has the heat transfer passageway including a plurality of heat exchange plate pieces of range upon range of setting between the adjacent heat exchange plate piece, the heat exchange plate piece has first angular hole, and the first angular hole of a plurality of heat exchange plate pieces aligns along the range upon range of direction at least part of heat exchange plate piece and forms first angular hole passageway, its characterized in that:

the heat exchange core body is provided with a first side and a second side along the stacking direction of the heat exchange plate sheets, the heat exchanger further comprises a flow guiding assembly, the flow guiding assembly is located on the second side of the heat exchange core body, the flow guiding assembly comprises a flow guiding channel and a first port and a second port which are respectively communicated with two ends of the flow guiding channel, the heat exchange core body is provided with a first end and a second end along the length direction of the heat exchange core body, and the first port and the second port are close to the first end;

the first port is communicated with the first angular hole channel and defines a first surface, the first surface is perpendicular to the stacking direction of the heat exchange plates, and the orthographic projection of the second port on the first surface does not have an overlapping part or a part overlapping with the orthographic projection of the heat exchange core on the first surface.

2. The heat exchanger of claim 1, wherein an orthographic projection of the second port on the first face does not overlap an orthographic projection of the heat exchange core on the first face, and a length of the flow-directing channel is no greater than a length of the heat exchange core.

3. The heat exchanger of claim 1, wherein an orthographic projection of the heat exchange core on the first face is at least partially outside an orthographic projection of the flow directing assembly on the first face, an area defining the orthographic projection of the heat exchange core on the first face is S1, and an overlapping area defining the orthographic projection of the heat exchange core on the first face and the orthographic projection of the flow directing assembly on the first face is S2, wherein 0.2S 1S 2S 1.

4. The heat exchanger according to any one of claims 1 to 3, wherein the first angular hole passage has a first sub-passage and a second sub-passage, the first sub-passage and the second sub-passage do not directly communicate, the first sub-passage is close to the first side of the heat exchange core and the second sub-passage is close to the second side of the heat exchange core in the stacking direction of the heat exchange plates, and the first port communicates with the second sub-passage.

5. The heat exchanger according to claim 4, wherein the flow guide assembly further comprises a flow guide tube which penetrates the flow guide channel and the second sub-channel in a stacking direction of the heat exchange plates, a port of the flow guide tube communicates with the first sub-channel, and the first port communicates with the second sub-channel.

6. The heat exchanger of claim 5, wherein the flow directing assembly has a first side and a second side, the first side of the flow directing assembly is close to the heat exchange core and the second side of the flow directing assembly is far from the heat exchange core relative to the first side of the flow directing assembly along the stacking direction of the heat exchange plates, the flow directing assembly further comprises a third port, the third port and the second port are both located at the second side of the flow directing assembly, the first port is located at the first side of the flow directing assembly, and the third port is communicated with or is another port of the flow directing tube.

7. The heat exchanger of claim 5, wherein the heat exchange core comprises a second corner hole channel, the second corner hole channel is near the second end of the heat exchanger, the heat exchange channel comprises a first heat exchange channel and a second heat exchange channel which are not communicated with each other, the first heat exchange channel comprises a first sub heat exchange channel and a second sub heat exchange channel, the first sub heat exchange channel is communicated with the first sub channel and the second corner hole channel, and the second sub heat exchange channel is communicated with the second corner hole channel and the second sub channel.

8. The heat exchanger of claim 6, wherein the heat exchange core comprises a second corner hole channel, the second corner hole channel is near the second end of the heat exchanger, the heat exchange channel comprises a first heat exchange channel and a second heat exchange channel which are not communicated with each other, the first heat exchange channel comprises a first sub heat exchange channel and a second sub heat exchange channel, the first sub heat exchange channel is communicated with the first sub channel and the second corner hole channel, and the second sub heat exchange channel is communicated with the second corner hole channel and the second sub channel.

9. The heat exchanger according to any one of claims 5 to 8, wherein the flow directing assembly comprises a flow plate and a first plate located between the heat exchange core and the flow plate, the flow plate being provided with grooves or with channels extending through the flow plate in the stacking direction of the heat exchange plates, the first port being provided in the first plate, the first port communicating with the second sub-passage, and the draft tube extending through the first port.

10. The heat exchanger according to any one of claims 5 to 8, wherein the flow directing assembly comprises a mounting plate and a flow plate, the flow plate being provided with grooves or having channels running through the flow plate in the stacking direction of the heat exchanger plates, the mounting plate having a first side close to the heat exchange core and a second side remote from the heat exchange core, the flow plate being close to the first side of the mounting plate, the flow directing tube having a first port communicating with the first sub-channel and a second port remote from the first sub-channel, the second port of the flow directing tube having a first turn-up;

the first flanging is positioned on the second side part of the mounting plate; or the drainage assembly further comprises a second plate, the second plate is located between the mounting plate and the flow plate, and the first flanging is located between the second plate and the mounting plate.

11. The heat exchanger of any one of claims 1 to 3, wherein the heat exchange core comprises a second angular hole channel and a third angular hole channel, the first angular hole channel and the third angular hole channel are both close to the first end of the heat exchange core, the second angular hole channel is close to the second end of the heat exchange core, the heat exchange channels comprise a first heat exchange channel and a second heat exchange channel which are not communicated with each other, the first heat exchange channel comprises a first sub heat exchange channel and a second sub heat exchange channel, the first sub heat exchange channel is communicated with the first angular hole channel and the second angular hole channel, the second sub heat exchange channel is communicated with the second angular hole channel and the third angular hole channel, the heat exchange core comprises an end plate close to the flow guide assembly, the end plate is provided with a fourth port communicated with the third angular hole channel, and the orthographic projection of the fourth port on the first surface is not communicated with the orthographic projection of the flow guide assembly on the first surface With overlapping portions.

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