CN111129645A

CN111129645A - Heat exchanger

Info

Publication number: CN111129645A
Application number: CN201811290988.4A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Automotive Components Co Ltd
Current assignee: Zhejiang Sanhua Automotive Components Co Ltd
Priority date: 2018-10-31
Filing date: 2018-10-31
Publication date: 2020-05-08
Anticipated expiration: 2038-10-31
Also published as: CN111129645B

Abstract

The utility model provides a heat exchange device, includes first mass flow portion and second mass flow portion, and the runner still includes the passageway of a plurality of first mass flow portions of intercommunication and second mass flow portion, and the passageway includes first straight section portion, first kink and the straight section portion of second, and first straight section portion and first mass flow portion intercommunication, heat exchange device include first slab and second slab, and heat exchange device still includes first casing. The first plate or the second plate is provided with a plurality of first pore passages, the first pore passages penetrate through the first plate or the second plate, and the first pore passages are communicated with the second straight section parts of the corresponding channels and the second collecting parts, so that the first collecting parts and the second collecting parts are positioned on the same side.

Description

Heat exchanger

Technical Field

The invention relates to the field of heat exchange, in particular to a heat exchange device.

Background

Batteries of electric vehicles or hybrid vehicles generate heat during charging and discharging, and a cooling plate is generally used to cool a battery unit.

Batteries of electric vehicles or hybrid vehicles generate heat during charging and discharging, and the batteries need to be cooled. A battery cooling mode is characterized in that a cooling plate is adopted to cool a battery, a flow channel for cooling liquid or refrigerant to flow through is formed in the cooling plate, and the cooling liquid or the refrigerant with lower temperature can take away heat generated by the battery, so that the purpose of reducing the temperature of the battery is achieved. The arrangement of the flow channels of the cooling plates is an important factor influencing the heat exchange of the cooling plates.

Disclosure of Invention

The technical scheme of the invention provides a heat exchange device which comprises a first plate and a second plate, wherein a flow channel is formed in the heat exchange device, and the heat exchange device is characterized in that the flow channel comprises a first flow collecting part and a second flow collecting part;

the flow channel further comprises a plurality of channels communicated with the first collecting portion and the second collecting portion, each channel comprises a first straight section portion, a first bending portion and a second straight section portion, the first straight section portion is communicated with the first collecting portion, the heat exchange device comprises a first interface end and a second interface end, the first interface end is communicated with the first collecting portion, and the second interface end is communicated with the second collecting portion;

the heat exchange device further comprises a first shell, the first shell comprises a second interface end, one part of the first shell is fixed with the first plate, the second collecting portion is located between the first plate and the first shell, the first plate is provided with a plurality of first pore channels, the first pore channels penetrate through the first plate, each first pore channel is arranged corresponding to each channel, and the first pore channels are communicated with the second straight section portions of the corresponding channels and the second collecting portion;

or, a part of the first shell is fixed with a second plate, the second collecting portion is located between the first plate and the first shell, the second plate is provided with a plurality of first pore channels, the first pore channels penetrate through the second plate, each first pore channel is arranged corresponding to each channel, and the first pore channels are communicated with the second straight section portions of the corresponding channels and the second collecting portion.

In the heat exchange device provided by the scheme, the first plate or the second plate is provided with a plurality of first pore channels, the first pore channels penetrate through the first plate or the second plate, and the first pore channels are communicated with the second straight section parts of the corresponding channels and the second collecting part, so that the first collecting part and the second collecting part are positioned on the same side.

Drawings

FIG. 1 shows an exploded schematic view of one embodiment of the present invention;

FIG. 2 shows a schematic flow path of the heat exchange device of FIG. 1;

FIG. 3 is a schematic partial cross-sectional view of the heat exchange unit of FIG. 2 taken along line A-A;

FIG. 4 shows a schematic cross-sectional view of the heat exchange unit of FIG. 2 taken along line B-B;

FIG. 5 shows an enlarged partial schematic view of the heat exchange unit of FIG. 1;

FIG. 6 shows a schematic enlarged view of a portion of another embodiment of the present invention;

FIG. 7 shows an exploded schematic view of yet another embodiment of the present invention;

FIG. 8 shows a schematic cross-sectional view of the heat exchange unit of FIG. 7 taken along line B '-B';

FIG. 9 shows a schematic top view of yet another embodiment of the present invention;

FIG. 10 shows a schematic bottom view of the heat exchange device of FIG. 9;

FIG. 11 shows a schematic cross-sectional view of the heat exchange device of FIG. 9 along the line B '-B';

FIG. 12 shows an exploded schematic view of a portion of the heat exchange device of FIG. 9;

FIG. 13 is a schematic perspective view of the heat exchange device and battery unit of FIG. 1;

fig. 14 shows a schematic flow path of yet another embodiment of the present invention.

Detailed Description

As shown in fig. 1, the heat exchange device comprises a first plate 2 and a second plate 3, and the second plate 3 and the first plate 2 can be fixed by brazing, and specifically, at least a part of a first plate surface 21 of the first plate 2 is fixed with the second plate 3. The other side of the second plate 3 can be provided with a heat conducting pad, and the second plate 3 is attached to the battery unit through the heat conducting pad and exchanges heat with the battery unit. The heat exchange device further comprises an inlet joint 5 and an outlet joint 6, and the inlet joint 5 and the outlet joint 6 can be fixed with the second plate 3 through welding.

As shown in fig. 2, a flow channel is formed in the heat exchange device, and the flow channel includes a first collecting portion 13 and a second collecting portion 14. The flow channel further includes a plurality of channels communicating the first collecting portion and the second collecting portion, the channels include a first straight section 151, a first bent portion 154, and a second straight section 152, and the first straight section 151 communicates with the first collecting portion.

The heat exchange device comprises a first interface end 11 and a second interface end 12, wherein the first interface end 11 is communicated with a first collecting portion 13, the second interface end 12 is communicated with a second collecting portion 14, the first interface end 11 is communicated with the inlet connector 5, and the second interface end 12 is communicated with the outlet connector 6. At least a portion of the first channel 15 and at least a portion of the second channel 16 are formed between the first plate 2 and the second plate 3.

At least two channels, a first channel 15 and a second channel 16, are shown as an example in fig. 2. Both the first passage 15 and the second passage 16 have a serpentine-like shape. Specifically, the first channel 15 includes a first straight section 151, a first bent section 154, and a second straight section 152, and the second channel 16 also includes a first straight section 161, a first bent section 164, and a second straight section 162. The first bent portions of the first and second passages may have substantially the same structure. Under the condition that the second collecting portion 13 and the inlet collecting portion 14 are not changed, the channel structure comprising the bent portions can relatively increase the flow resistance of the first channel 15 and the second channel 16, and reduce the influence of the pressure drop generated in the first collecting portion and the second collecting portion on the flow distribution of each channel, namely reduce the influence of the pressure drop of the main flow on the flow distribution of the branch flow. The first collecting portion thus makes the flow rate distributed into the first channel and the flow rate distributed into the second channel relatively even, and heat exchange of the heat exchange device is facilitated. Further, the bending angle of the first bending part 154 may be substantially 180 degrees, and the shape of the first bending part 154 may be substantially "U" shaped.

As defined by the dashed lines in fig. 2, the heat exchange device comprises a first heat exchange area 41 and a second heat exchange area 42, it should be noted that there is no obvious division of the heat exchange area in the heat exchange device, and the division of the heat exchange area into the plurality of heat exchange areas is only used for illustration, and is not used to limit the number and division of the heat exchange areas. The first channels 15 are located in the first heat exchange area 41, the second channels 16 are located in the second heat exchange area 42, the first heat exchange area 41 and the second heat exchange area 42 may be adjacent to each other or may be spaced apart from each other by a certain distance, the first heat exchange area and the second heat exchange area are arranged along the extending direction of the first collecting portion, and the first heat exchange area and the second heat exchange area are arranged in parallel, that is, as shown in fig. 1, the first heat exchange area and the second heat exchange area are arranged along the X direction. Specifically, in the present embodiment, the first heat exchange region 41 and the second heat exchange region 42 have substantially the same shape.

In this embodiment, the channels further include a third channel located in the third heat exchange area, a fourth channel located in the fourth heat exchange area, a fifth channel located in the fifth heat exchange area, a sixth channel located in the sixth heat exchange area, a seventh channel located in the seventh heat exchange area, an eighth channel located in the eighth heat exchange area, a ninth channel located in the ninth heat exchange area, and a tenth channel located in the tenth heat exchange area. One end of each channel communicates with the first header portion 13, and the other end of each channel communicates with the second header portion 14. The structure of the second to tenth passages may be substantially the same as that of the first passage. The phrase "substantially the same" means that the total length of the channels is the same and the cross-sectional area of the channels is the same. The first heat exchange area to the tenth heat exchange area are arranged substantially in parallel along the X-axis. In the present embodiment, each battery cell included in the battery pack 9 is a long rectangle arranged in parallel, and two adjacent heat exchange regions are matched with one battery cell. As shown in fig. 13, the first heat exchanging region 41 and a heat exchanging region adjacent thereto are in thermal contact with the first battery cell 91 included in the battery pack 9. The number of the channels is not limited to ten, and the number of the channels can be adjusted as required. The structure of the individual channels may also be different.

As shown in fig. 2, the first header 13 includes at least a first distribution segment 131 and a second distribution segment 132, the first distribution segment 131 being closer to the first interface end 11 than the second distribution segment 132, the first distribution segment having a cross-sectional area at a smallest portion that is larger than a cross-sectional area at a largest portion of the cross-sectional area of the second distribution segment. It should be noted here that the first header 13 does not include a portion of the area where the first header 13 is connected to the channels and the first interface end. The first distribution section 131 communicates with the first passage 15, and the second distribution section 132 communicates with the second passage 16.

The second header 14 includes at least a third distribution section 141 and a fourth distribution section 142, the fourth distribution section 142 being closer to the second interface end 12 than the third distribution section 141, the fourth distribution section 142 having a cross-sectional area with a smallest portion of the cross-sectional area that is larger than a cross-sectional area of a largest portion of the cross-sectional area of the third distribution section 141. It should be noted here that the second header 14 does not include a portion of the area where the second header 14 connects to the channels and the second interface end 12. The third distribution section is communicated with the first channel, and the fourth distribution section is communicated with the second channel.

In this embodiment, the connecting portion of the first channel 15 and the first header 13 is close to the first interface end, the connecting portion of the first channel 15 and the second header 14 is far from the second interface end, the connecting portion of the second channel 16 and the first header 13 is far from the first interface end, the connecting portion of the second channel 16 and the second header 14 is close to the second interface end, the cross-sectional area of the second header 14 is gradually reduced in a direction far from the second interface end 12, and the cross-sectional area of the first header 13 is gradually reduced in a direction far from the first interface end 11. The flow collecting parts and the channels of the first interface end and the second interface end enable the fluid in each channel to have relatively uniform flow velocity, namely the flow distribution of each channel is relatively uniform, so that the temperature gradient is relatively small when the heat exchange device exchanges heat, and the heat exchange performance of the heat exchange device can be improved. It should be noted that the gradually decreasing cross-sectional area of the collector portion includes, but is not limited to, a continuous decrease in cross-sectional area (i.e., the cross-sectional area of the collector portion decreases every time it passes through one channel), and may be a constant cross-sectional area of the collector portion passing through two or more adjacent channels. The first interface end and the second interface end are located on the same side of the heat exchange device, and the first interface end and the second interface end are located on the same side of the plate surface of the first plate or the second plate.

The first header 13 may include more than two distribution segments of different cross-sectional areas that decrease in cross-sectional area in sequence in a direction away from the first interface end 11. The second header 14 may also include more than two distribution segments of different cross-sectional areas that decrease in cross-sectional area in sequence in a direction away from the second interface end 12. In the present embodiment, the first current collecting portion 13 and the second current collecting portion 14 may be disposed in rotational symmetry with respect to the geometric center of the second plate. The first interface end 11 and the second interface end 12 may be disposed diagonally, that is, located in two diagonal regions of the first plate 3, so that the lowest temperature point and the highest temperature point of the first plate 3 are located in two regions farthest apart.

The first collector portion 13 extends in a first direction, and the second collector portion 14 extends in a second direction, which is substantially parallel to the X axis in the present embodiment. It should be noted that the extending direction of the first current collecting portion 13 and the extending direction of the second current collecting portion 14 are not strictly parallel to each other, and may have a small angle.

As shown in fig. 2, the first channel 15 includes a first straight section 151, a second straight section 152 and a first bent section 154, and the second channel 16 also includes a first straight section 161, a first bent section 164 and a second straight section 162. The first straight segment 151 of the first channel 15 communicates with the first collecting portion 13, the first bent portion 154 of the first channel 15 communicates with the first straight segment 151 and the second straight segment 152 of the first channel 15, and the second straight segment 152 of the first channel 15 communicates with the second collecting portion 14. The first straight section 161 of the second channel 16 communicates with the first collecting portion, and the first bent portion 164 of the second channel 16 communicates with the first straight section 161 of the second channel 16 and the second straight section 162 of the second channel 16. The flow direction of the first straight section 151 is opposite to the flow direction of the second straight section 152. The first current collecting part and the second current collecting part are positioned on the same side of the heat exchange device. The first and second current collecting

portions

13 and 14 do not interfere with each other. First straight section 151 and second straight section 152 are close to the setting, are favorable to producing the heat transfer between first straight section and the second straight section, for the scheme that only has a straight section, are favorable to heat transfer device's temperature evenly distributed. Furthermore, since the fluid is at its lowest temperature when flowing into the first port end of the channel and at its highest temperature when flowing out of the second port end of the channel, the first end and the second end of the first channel 15 may be arranged adjacent to each other to reduce the temperature difference within the first heat exchanging region 41 and to make the temperature distribution relatively uniform.

It should be noted that the central axis of the straight section of each channel includes, but is not limited to, a strict straight line, and the central axis of the straight section of each channel may also have a bend with a small angle.

As shown in fig. 13, the first plate surface 31 of the second plate 3 is a flat surface, and the first plate surface 31 of the second plate 3 is in direct or indirect thermal contact with the battery cell 91. The second collecting portion 13 and the first collecting portion 14 are disposed closely. Further, in order to increase the contact area of the first plate surface 31 with the battery cell, the first current collecting portion 13 and the second current collecting portion 14 are both located on the side of the first plate surface 31 of the second sheet 3 away from the battery cell. In this way, the area of the flat surface that can be in contact with the battery cell 91 is relatively large.

When the heat exchange device is connected into a cooling system, fluid flows into the first collecting portion 13 from the first interface end 11, the cooling liquid is distributed to each channel, after heat exchange, the cooling liquid is collected in the second collecting portion 14, and finally flows out from the second interface end 12.

As shown in fig. 3, L2 is the maximum width of the cross-section of the first channel, and preferably L2 has a value in the range of 10mm to 40 mm. For example 10mm, 15mm, 20mm, 25mm, 30mm, 35mm, 40 mm. In the case of a heat exchanger having a small channel cross-sectional width, the pressure resistance of the heat exchanger is relatively high without changing the thickness of the flow plate or flat plate, and it should be noted that the term "pressure resistance" refers to the resistance to deformation under the pressure of the internal coolant. The cross-sectional width of each of the other channels may also range from 10mm to 40 mm.

Preferably, as shown in fig. 3 and 5, the first plate 2 includes a fixing portion 211, and the fixing portion 211 is fixed to the second plate 3, and preferably, the fixing portion 211 may be fixed to the second plate 3 by welding. At least a part of the fixing part 211 is positioned between the adjacent straight section parts, at least a part of the fixing part 211 is positioned between the adjacent channels, and the width L1 of the narrowest part of the fixing part positioned between the adjacent straight section parts is greater than or equal to 6 mm. The welding strength of the first sheet 2 and the second sheet 3 can be ensured.

As defined by the dashed lines in fig. 5, the first plate 2 has a first protrusion 23 at a portion where at least one of the channels communicates with the first header, and a portion of the first protrusion 23 protrudes toward the first interface end 11. The first projection 23 is a part of the fixing portion. The first protrusion 23 can introduce the branch flow into the first channel 15 at an acute angle relative to the main flow, and can relatively reduce the vortex generated by the sudden change of the flow direction, and can play a role in guiding and guiding the flow. The fluid flowing through each channel is referred to as a branch flow, the fluid flowing through the header portion is referred to as a main flow, and the branch flow is divided by the main flow. The first sheet 2 may have first protrusions 23 of substantially the same structure at the communication of each channel with the first header 13.

The second header portion 14 has a strip shape, and a portion of the first plate 2, at which at least one of the channels communicates with the second header portion 14, has a second protrusion (not shown) protruding toward the second interface end 12, and the structure of the second protrusion is substantially the same as that of the first protrusion 23. The second protrusion is a part of the fixing portion. The secondary flow in the first channel 15 can be merged into the secondary collector 14 at an acute angle to the main flow by means of the secondary projections. The eddy current generated by the branch flow impacting the inner wall of the second collecting part 14 can be relatively weakened, and the functions of flow guiding and flow guiding can be achieved. The first sheet 2 may have second protrusions of substantially the same structure at the communication of each channel with the second collector 14.

In another embodiment of the heat exchange device, the first collecting portion 13 has a bar shape, the first port end 11 is communicated with the middle portion of the first collecting portion, and the second port end is communicated with the middle portion of the second collecting portion. The "intermediate portion" is not strictly an intermediate position, and positions not located at both ends of the first or second collecting portion may be regarded as intermediate portions.

Fig. 6 shows another embodiment of the heat exchanging device, and as shown in fig. 6, the first plate 2 further includes a plurality of first protrusions 27 protruding into the first channels 15, and the first protrusions 27 may play a role of turbulence to increase the heat transfer efficiency of the heat exchanging device. At the same time, the first protrusion 27 may also increase the strength of the first sheet 2. Alternatively, other structures that serve as flow perturbation, such as flow perturbation fins, may be provided in each channel or collector. The first sheet 2 may include a plurality of second protrusions (not shown) protruding into the first header portion and/or the second header portion. The second protrusion may increase the strength of the current collecting portion.

As shown in fig. 2, the first collecting portion 13 and the second collecting portion 14 are both located on one side of the second plate 3, and a plurality of first straight sections and second straight sections are sequentially arranged at intervals, and the structure of the second collecting portion 14 is more critical. The second collecting portion 14 can be constructed in various ways, and in particular, the heat exchange device further comprises the first shell 7. The first housing 7 includes a second interface end 12.

As shown in fig. 1 to 5, a part of the first housing 7 is fixed to the first plate 2. The second collecting portion 14 is located between the first plate and the first case. Specifically, the second collecting portion 14 is formed by fixing the first wall surface 71 of the first case 7 to the first sheet 2 and sealing the joint, and preferably, the fixing manner may be brazing. The first plate 2 has a first duct 331, the first duct 331 penetrates the first plate 2, each first duct 331 is disposed corresponding to each channel, and the first duct 331 communicates the second straight section portion of the corresponding channel with the second collecting portion 14. The fluid in the first passage 15 may pass through the first orifice 331 to the second header 14. This makes it possible to locate the first and second collecting portions on the same side. In addition, in this embodiment, the flat area of the first plate surface 31 of the second plate 3 is relatively large, and the area of the second plate 3 which can be in direct or indirect thermal contact with the battery pack is large, which is beneficial to improving the heat exchange efficiency of the heat exchange device. The number of the first hole 311 may be plural, and the number of the first hole 311 may be the same as the number of the channels.

More specifically, as shown in fig. 1, 4 and 5, the first housing 7 has a second port 74 corresponding to each of the first ports 331. A plurality of second duct channels 74 extend through the first housing 7, the first plate 2 comprises a step surface 28, the second duct channels 74 are in butt joint with the first duct channels 331, and the step surface 28 and the first wall surface 71 are fixed and the joint is sealed. It should be noted that, since the first plate 2 can be manufactured by stamping, the portion of the plate recessed on one side is correspondingly protruded on the opposite side. As shown in fig. 1 and 3, the first channel 15 is recessed in the first plate surface 21 of the first plate 2, the step surface 28 protrudes from the second plate surface 22 of the first plate 2, and the step surface 28 may be located at a position corresponding to the first channel 15.

Further, at least a part of the fixing portion 211 is located between one end of the channel communicating with the first porthole 311 and the first collecting portion 13. As shown in fig. 5, a portion of the fixing portion 211 is located between one end of the first passage 15 communicating with the first orifice 311 and the first collecting portion 13. This portion of the fixing portion 211 may separate the first orifice passage 311 from the first collecting portion 13.

In yet another embodiment of the heat exchanger device, as shown in fig. 7 and 8, the first plate 2 comprises a channel plate 25 and a plate 26, said channel plate 25 being substantially flat on both sides, the plate 25 being fixed to the channel plate 26, preferably by welding. The second panel surface 32 of the second plate 3 is substantially flat. The flat plate, the channel plate 25 and the second sheet 3 are stacked in this order. Specifically, the channel plate 25 has a hollow portion 251, the channel plate 25 is fitted to the flat plate and the second plate 3, and a structure similar to the first channel, the second channel, and the first current collecting portion 13 may be formed at the hollow portion 251, and the height of each channel corresponds to the thickness of the channel plate 25. Since the second plate surface 22 of the first plate 2 is substantially flat, the contact surface between the first housing 7 and the first plate 2 is relatively large when the two are fixed, so that the sealing surface is relatively large and the risk of leakage at the fixing is relatively reduced. In addition, if the first housing 7 is fixed by welding, the relatively large contact surface makes the welding surface relatively large, and the first housing 7 is fixed relatively more firmly. In addition, the first plate surface 21 of the first plate 2 can also be in direct or indirect thermal contact with the battery unit, that is, both surfaces of the heat exchange device can exchange heat with the battery unit, so that the heat exchange structure is relatively more compact. A metal material may be used for each plate, and preferably, aluminum or an aluminum alloy is used as the plate material.

In yet another embodiment of the first housing 7, as shown in fig. 9 to 12, the first housing 7 has a plate shape. A portion of the first housing 7 is fixed to the first plate 31 of the second plate 3, and the second plate 3 has a first hole 331. The first plate 2 is fixed to the second plate 32 of the second plate 3, and the first plate 31 and the second plate 32 of the second plate 3 are located on opposite sides of the second plate 3. The second collecting portion 14 is located between the first plate and the first case 7. Specifically, the second collecting portion 14 is formed by fixing the first wall surface 71 of the first case 7 and the first plate surface 31 of the second plate 3, and sealing the joint, for example, by welding. The first duct 331 penetrates through the second plate 3, the first duct 331 is disposed corresponding to each channel, and the first duct 331 communicates the second straight section portion of the corresponding channel with the second collecting portion 14. The fluid in the first passage 15 may pass through the first orifice 331 to the second header 14. Since the first plate surface 31 can be substantially flat in this embodiment, the welding between the first shell 7 and the second plate 3 is more secure, and the sealing between the first wall surface 71 and the second plate surface 31 is facilitated.

In yet another embodiment of the present invention, the first distribution section is in communication with a plurality of channels, the second distribution section is in communication with a plurality of channels, the third distribution section is in communication with a plurality of channels, and the fourth distribution section is in communication with a plurality of channels. Specifically, as shown in fig. 14, four adjacent passages (including the first passage 15) communicate with the first distribution section 131 (defined by a dotted line in the drawing), and the cross-sectional area of the first distribution section 131 is constant. Three adjacent channels (including the second channel 16) communicate with the second distribution section 132 (demarcated by a dotted line in the drawing), and the cross-sectional area of the second distribution section 132 is constant.

It should be noted that: although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will appreciate that various combinations, modifications and equivalents of the present invention can be made by those skilled in the art, and all technical solutions and modifications thereof without departing from the spirit and scope of the present invention are encompassed by the claims of the present invention.

Claims

1. A heat exchange device comprising a first plate (2) and a second plate (3), wherein a flow channel is formed in the heat exchange device, characterized in that the flow channel comprises a first current collecting part (13) and a second current collecting part (14);

the flow channel further comprises a plurality of channels communicated with the first collecting portion and the second collecting portion, each channel comprises a first straight section (151), a first bending portion (154) and a second straight section (152), the first straight section is communicated with the first collecting portion, the heat exchange device comprises a first interface end (11) and a second interface end (12), the first interface end is communicated with the first collecting portion (13), and the second interface end is communicated with the second collecting portion (14);

the heat exchange device further comprises a first shell (7) which comprises a second interface end, one part of the first shell (7) is fixed with the first plate (2), the second collecting portion (14) is located between the first plate and the first shell, the first plate (2) is provided with a plurality of first hole channels (331), the first hole channels (331) penetrate through the first plate, each first hole channel is arranged corresponding to each channel, and the first hole channels are communicated with the second straight section portions and the second collecting portions of the corresponding channels;

or, a part of the first shell (7) is fixed with a second plate (3), the second collecting portion (14) is located between the first plate and the first shell, the second plate (3) is provided with a plurality of first hole channels (331), the first hole channels (331) penetrate through the second plate, each first hole channel is arranged corresponding to each channel, and the first hole channels are communicated with a second straight section of the corresponding channel and the second collecting portion.

2. The heat exchange device of claim 1,

the first plate comprises fixing portions (211), the fixing portions (211) are fixed with the second plate, at least one part of the fixing portions are located between adjacent straight section portions, at least one part of the fixing portions are located between adjacent channels, the width L1 of the narrowest portion of the fixing portions located between the adjacent straight section portions is larger than or equal to 6mm, and at least one part of the fixing portions (211) are located between one end of the second straight section portion and the first current collecting portion (13).

3. The heat exchange device of claim 2,

the first sheet (2) is provided with a first protruding part (23) at the communication part of at least one channel and the first collecting part, a part of the first protruding part (23) protrudes towards the first interface end (11), and the first protruding part is a part of the fixing part;

and/or the first sheet (2) is provided with a second protruding part at the communication part of at least one channel and the second current collecting part (14), wherein one part of the second protruding part protrudes towards the second interface end (12), and the second protruding part is one part of the fixing part.

4. A heat exchange device according to any one of claims 1 to 3, characterized in that said first header (13) comprises at least a first distribution section (131) communicating with said first channels and a second distribution section (132) communicating with said second channels, said first distribution section (131) being closer to said first interface end than said second distribution section (132), the cross-sectional area of the smallest section area portion of said first distribution section (131) being greater than the cross-sectional area of the largest section area portion of said second distribution section (132).

5. The heat exchange device according to claim 4, characterized in that the second header (14) comprises at least a third distribution section (141) and a fourth distribution section (142), the fourth distribution section (142) being closer to the second interface end than the third distribution section (141), the cross-sectional area of the smallest section area part of the fourth distribution section (142) being larger than the cross-sectional area of the largest section area part of the third distribution section (141).

6. The heat exchanger of claim 4, wherein the cross-sectional area of the first header portion decreases in a direction away from the first port end, and the cross-sectional area of the second header portion decreases in a direction away from the second port end;

the first interface end is communicated with the middle part of the first collecting part, and the second interface end is communicated with the middle part of the second collecting part; or the first interface end is communicated with one end of the first collecting portion, the second interface end is communicated with one end of the second collecting portion, the first interface end and the second interface end are located on the same side of the heat exchange device, and the first interface end and the second interface end are located on the same side of the plate surface of the first plate or the second plate.

7. The heat exchanger of claim 5, wherein the first distribution section is in communication with a plurality of said channels, the second distribution section is in communication with a plurality of said channels, the third distribution section is in communication with a plurality of said channels, and the fourth distribution section is in communication with a plurality of said channels;

the first interface end is communicated with the middle part of the first collecting part, and the second interface end is communicated with the middle part of the second collecting part; or the first interface end is communicated with one end of the first collecting portion, the second interface end is communicated with one end of the second collecting portion, and the first interface end and the second interface end are arranged diagonally.

8. The heat exchange device of claim 4, wherein L2 has a value in the range of 10mm to 40mm, and L2 is the maximum width of the cross section of the first channel;

the first plate (2) comprises a plurality of first protrusions (27) protruding into the first channel;

and/or the first plate (2) comprises a plurality of second convex parts protruding towards the inside of the first current collecting part and/or the second current collecting part.

9. A heat exchange device according to claim 1, characterized in that the first plate (3) comprises a step surface (28), the step surface (28) protruding from the second plate surface (22) of the first plate (2), the first wall surface (71) being in direct or indirect contact with the step surface (28).

10. A heat exchange device according to claim 1, characterised in that the first plate (2) comprises a channel plate (25) and a plate (26), the plate (25) being fixed to the channel plate (26), the channel plate (25) comprising a void (251).