CN114111400A

CN114111400A - Heat exchange device

Info

Publication number: CN114111400A
Application number: CN202010895073.7A
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: 2020-08-31
Filing date: 2020-08-31
Publication date: 2022-03-01
Anticipated expiration: 2040-08-31
Also published as: CN114111400B

Abstract

The invention provides a heat exchange device, which comprises a core body, wherein the core body comprises a first circulation channel and a second circulation channel, the first circulation channel comprises a first hole channel and a second hole channel, the heat exchange device further comprises a first interface and a second interface, the core body further comprises a third circulation channel, the heat exchange device further comprises a fluid control assembly, the fluid control assembly comprises a valve body, the valve body is fixed with the core body, the valve body further comprises a first channel, a second channel and a third channel, the second channel can be communicated with the first channel and/or the second channel is communicated with the third channel through the action of a thermal element and an elastic element, the first channel is communicated with the first hole channel, one end of the second hole channel is communicated with the third channel, and the other end of the second hole channel is communicated with the second interface, the fluid control assembly is not connected to the core by a conduit.

Description

Heat exchange device

Technical Field

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

Background

At present, plate heat exchangers are widely used in automobiles, and one application of the plate heat exchangers is to use the plate heat exchangers for heat exchange between transmission oil or engine oil and a coolant, that is, the plate heat exchangers serve as oil coolers, and control whether the transmission oil or the engine oil passes through the oil coolers through temperature regulators, so as to cool the transmission oil or the engine oil, wherein the temperature regulators are respectively communicated with the transmission or the engine and the oil coolers through pipelines.

Disclosure of Invention

It is an object of the present invention to provide a heat exchange device that simplifies plumbing by fixedly attaching a fluid control assembly to a core.

The invention provides a heat exchange device, which comprises a core body, wherein the core body comprises a first circulation channel and a second circulation channel which are isolated from each other, the first circulation channel comprises a first pore channel and a second pore channel, the heat exchange device further comprises a first interface and a second interface, the core body further comprises a third circulation channel, and the third circulation channel penetrates through a heat exchange area of the core body; the heat exchange device further comprises a fluid control assembly, the fluid control assembly comprises a valve body, a thermal element and an elastic element, the valve body is fixed with the core body, the valve body further comprises a first channel, a second channel and a third channel, one end of the third circulation channel is communicated with the second channel, the other end of the third circulation channel is communicated with the first interface, the first channel is communicated with the first pore channel, one end of the second pore channel is communicated with the third channel, and the other end of the second pore channel is communicated with the second interface.

According to the heat exchange device provided by the invention, the valve body of the fluid control assembly is fixed with the core body, the first channel of the valve body is communicated with the first pore channel, the second channel is communicated with the third flow channel, and the third channel is communicated with the second pore channel, so that a pipeline for connecting the fluid control assembly with the core body is omitted, and the fluid control assembly is not provided with an interface of an external pipeline.

Drawings

FIG. 1 is a perspective view of a heat exchange device of the present invention;

FIG. 2 is an exploded view of a heat exchange device of the present invention;

FIG. 3 is a top plan view of a heat exchange device of the present invention;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

FIG. 5 is a cross-sectional view of a valve body of a heat exchange device of the present invention;

FIG. 6 is a schematic view of an adapter of a heat exchange apparatus according to the present invention;

FIG. 7 is a schematic view of the end plate of a heat exchange device of the present invention;

FIG. 8 is a schematic view of the construction of a first plate of a heat exchange device of the present invention;

FIG. 9 is a schematic view of the construction of the base plate of a heat exchange device of the present invention;

FIG. 10 is a schematic view of the construction of a cover plate of a heat exchange device according to the present invention;

fig. 11 is a schematic structural view of a base of a heat exchange device of the present invention.

Reference numerals:

the core body 1 is provided with a plurality of core bodies,

a first plate 11, a first middle portion 111, an angular hole 112, a first flow-through hole 113, a first blocking portion 114,

the first porthole 121, the end plate 13, the first through-hole 131, the second through-hole 132, the third through-hole 133,

the adapter 14, the first groove 141, the second groove 142, the first adapter channel 143, the second adapter channel 144, the third adapter channel 145,

the second port channel 151 is formed in the second port channel,

the third flow-through channel 16 is,

the fluid control assembly 2, the valve body 21, the mounting chamber 211, the first passage 212, the second passage 213, the third passage 214,

a bottom plate 3, a fourth through hole 31, a fifth through hole 32, a sixth through hole 33, a seventh through hole 34,

a cover plate 41, a fourth via 411, a fifth via 412, a sixth via 413, a seventh via 414, a third interface 415, a fourth interface 416,

a base 42, a third recess 421, a fourth recess 422, a fifth recess 423, a sixth recess 424, a first port 425, a second port 426,

a first adapter 5 and a second adapter 6.

Detailed Description

Embodiments of the invention are described below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

Referring to fig. 1 and 8, the core 1 includes a plurality of first plates 11 and a plurality of second plates which are stacked, the first plates 11 include a first middle portion 111 and corner holes 112 located in the first middle portion 111, the first middle portion 111 is rectangular, the number of the corner holes 112 is 4, the 4 corner holes 112 are respectively located adjacent to corners of the first middle portion 111, the first middle portion 111 is provided with a first flow through hole 113, the first flow through hole 113 is circular, square, or the like, here, taking the shape of the first flow through hole 113 as a circular example, the center of the first flow through hole 113 coincides with the center of the first plate 11, that is, the first flow through hole 113 is located in the middle of the first middle portion 111.

The second plate has the same or similar structure as the first plate 11, the second plate comprises a second middle part and a corner hole 112 located in the second middle part, the corner hole 112 on the first middle part 111 and the corner hole 112 on the second middle part are stacked to form a first hole channel 121, a second hole channel 151, a third hole channel and a fourth hole channel, the first middle part and the second middle part form the first inter-plate channel therebetween, the second middle part and the first middle part form the second inter-plate channel therebetween, the first inter-plate channel and the second inter-plate channel are heat exchange regions of the core, the core 1 comprises a first flow channel and a second flow channel which are isolated from each other, the first flow channel comprises a first hole channel 121, a first inter-plate channel and a second hole channel 151, the first plate channel communicates the first hole channel 121 and the second hole channel 151, the second flow channel comprises a third hole channel, a second inter-plate channel and a fourth hole channel, the second interplate passages communicate the third port channel and the fourth port channel. The hole wall of the first flow through hole 113 extends towards the second middle part to form a first blocking part 114, one end of the first blocking part 114, which is far away from the first middle part 111, is in sealing connection with the second middle part, the second middle part comprises a second flow through hole, the projection of the second flow through hole on the plane of the first middle part 111 is positioned in the projection of the first blocking part 114 on the plane of the first middle part 111, the hole wall of the second flow through hole extends towards the first middle part 111 to form a second blocking part, one end of the second blocking part, which is far away from the second middle part, is in sealing connection with the first middle part 111, the projection of the first flow through hole 113 on the plane of the second middle part is positioned in the projection of the second blocking part on the plane of the first middle part 111, the first blocking part 114 comprises a fourth channel, the second blocking part comprises a fifth channel, the first flow through hole 113, the fourth channel, the second flow through hole and the fifth channel are communicated to form a third flow channel 16, that is, the third flow channel 16 extends along the direction in which the first plate 11 and the second plate are stacked, the third flow channel 16 is not communicated with the first inter-plate channel, and the third flow channel 16 is not communicated with the second inter-plate channel, which facilitates assembly of the core body 1 and saves cost.

The corner hole 112 forming the first duct 121 in the first middle portion 111 and the corner hole 112 forming the second duct 151 in the first middle portion 111 are diagonally arranged, the corner hole 112 forming the third duct in the first middle portion 111 and the corner hole 112 forming the fourth duct in the first middle portion 111 are diagonally arranged, and the first flow through hole 113 is approximately located in the center of the first plate 11, so that the fluid control assembly 2 is conveniently installed, and the cost is saved.

Referring to fig. 2-3 and 6-7, the core body 1 further includes an adapter 14 and an end plate 13, the end plate 13 is located on the top of the core body 1, that is, the end plate 13 is welded to the first plate 11 or the second plate located at the upper end (in the direction in which the plates are stacked), the end plate 13 includes a first through hole 131, a second through hole 132, and a third through hole 133, the first through hole 131 is aligned with the first porthole 121, the second through hole 132 is aligned with the third through channel 16, the third through hole 133 is aligned with the second porthole 151, the first through hole 131 communicates with the first porthole 121, the second through hole 132 communicates with the third through channel 16, and the third through hole 133 communicates with the second porthole 151.

The adapter 14 includes a first groove 141 and a second groove 142, and after the adapter 14 is connected (preferably welded) with the end plate 13, a first flow guiding channel is formed in the first groove 141, and a second flow guiding channel is formed in the second groove 142, so that the heat exchanging device is compact in structure and convenient to install.

The adapter 14 includes a first adapter channel 143, a second adapter channel 144, and a third adapter channel 145, a projection of the first through hole 131 on a plane where the bottom wall of the first groove 141 is located at one end of the first groove 141, a projection of the first adapter channel 143 on a plane where the bottom wall of the first groove 141 is located at the other end of the first groove 141, a projection of the third through hole 133 on a plane where the bottom wall of the second groove 142 is located at one end of the second groove 142, a projection of the third adapter channel 145 on a plane where the bottom wall of the second groove 142 is located at the other end of the second groove 142, the first through hole 131 and the first adapter channel 143 are communicated with each other by the first adapter channel 143, the first through channel 143 and the first channel 212 are communicated by the first adapter channel 143, the third through hole 132 and the second adapter channel 16 are communicated with each other by the second through channel 144, the second adapter channel 144 and the second through channel 213 are communicated with each other by the third through hole 133 and the third adapter channel 145, and the second through channel 145 are communicated with each other by the second through channel and the second through channel 145 A three-channel 214.

Referring to fig. 2-4 and 5, the heat exchange device further includes a fluid control assembly 2, the fluid control assembly 2 includes a valve body 21, a thermal element, and an elastic element, the valve body 21 is fixedly connected to the adapter 14, the fixed connection includes welding, screw bolt connection, and the like, the valve body 21 includes a mounting cavity 211, the thermal element and the elastic element are located in the mounting cavity 211, the valve body 21 further includes a first channel 212, a second channel 213, and a third channel 214, the second channel 213 communicates with the second adapter channel 144, one end of the first channel 212 is aligned with one end of the first adapter channel 143, and one end of the third channel 214 is aligned with one end of the third adapter channel 145.

The second passage can be brought into communication with the first passage and/or the second passage can be brought into communication with the third passage by the action of the thermal element and the elastic element.

The valve body 21 of the fluid control assembly is fixed with the core body 1, the first channel 212 of the valve body 21 is communicated with the first hole channel 121, the second channel 213 is communicated with the third flow channel 16, and the third channel 214 is communicated with the second hole channel 151, so that a pipeline for connecting the fluid control assembly with the core body 1 is omitted, and the fluid control assembly is not provided with an interface for externally connecting the pipeline.

Referring to fig. 2, 8-11, the heat exchange device further includes a bottom plate 3 and a mounting plate assembly, the bottom plate 3 is located on a side of the core body 1 away from the end plate 13, that is, the bottom plate 3 is welded to the first plate 11 or the second plate located at the lower end, the mounting plate assembly includes a base 42 and a cover plate 41, the cover plate 41 is located between the bottom plate 3 and the base 42, preferably, the cover plate 41 is welded to the bottom plate 3 and the base 42, so as to improve the sealing performance of the heat exchange device, the base 42 includes a third groove 421 and a fourth groove 422, and after the cover plate 41 is connected to the base 42, a third drainage channel is formed in the third groove 421, and a fourth drainage channel is formed in the fourth groove 422.

The bottom plate 3 includes a fourth through hole 31 and a fifth through hole 32, the fourth through hole 31 is communicated with the third flow channel 16, the fifth through hole 32 is communicated with the second duct 151, the cover plate 41 includes a fourth through channel 411 and a fifth through channel 412, the fourth through hole 31 is aligned with the fourth through channel 411, the fourth through hole 31 is communicated with the fourth through channel 411, the fifth through hole 32 is aligned with the fifth through channel 412, the fifth through hole 32 is communicated with the fifth through channel 412, the fourth through channel is communicated with the third flow channel, and the fifth through channel 412 is communicated with the fourth flow channel.

The base 42 is provided with a first interface 425 and a second interface 426 on one side far away from the core body 1, a third drainage channel is communicated with the first interface 425, a fourth drainage channel is communicated with the second interface 426, the projection of the fourth switching channel 411 on the plane where the bottom wall of the third groove 421 is located at one end of the third groove 421, the projection of the first interface 425 on the plane where the bottom wall of the third groove 421 is located at the other end of the third groove 421, the projection of the fifth switching channel 412 on the plane where the bottom wall of the fourth groove 422 is located at one end of the fourth groove 422, and the projection of the first interface 425 on the plane where the bottom wall of the fourth groove 422 is located at the other end of the fourth groove 422.

Referring to fig. 2, 8-11, the portion of the end plate 13 corresponding to the third hole seals the third hole, the base 42 further includes a fifth groove 423, and a fifth drainage channel is formed in the fifth groove 423 after the cover plate 41 is connected to the base 42.

The cover plate 41 comprises a sixth switching channel 413 and a third interface 415, the projection of the sixth switching channel 413 on the plane where the bottom wall of the fifth groove 423 is located at one end of the fifth groove 423, the projection of the sixth switching channel 413 on the plane where the cover plate 41 is located in the projection of the core 1 on the plane where the cover plate 41 is located, the third interface 415 is arranged on one side, away from the base 42, of the cover plate 41, the projection of the third interface 415 on the plane where the bottom wall of the fifth groove 423 is located at the other end of the fifth groove 423, the projection of the third interface 415 on the plane where the cover plate 41 is located outside the projection of the core 1 on the plane where the cover plate 41 is located, the heat exchange device further comprises a first connecting pipe 5, the first connecting pipe 5 is communicated with the third interface 415, the third connecting pipe is convenient to install, the structure of the heat exchange device is more compact, and the installation space of the heat exchange device is saved.

The fifth drainage passage communicates the third port 415 with the sixth through passage 413, the base plate 3 includes a sixth through hole 33, the sixth through hole 33 is aligned with the sixth through passage 413, and the sixth through hole 33 communicates the sixth through passage 413 with the third port.

Referring to fig. 2, 8-11, the portion of the end plate 13 corresponding to the fourth channel seals the fourth channel, the base 42 further includes a sixth groove 424, and a sixth drainage channel is formed in the sixth groove 424 after the cover plate 41 is connected to the base 42.

The cover plate 41 includes a seventh adapter passage 414 and a fourth interface 416, a projection of the seventh adapter passage 414 on a plane where a bottom wall of the sixth recess 424 is located at one end of the sixth recess 424, a projection of the seventh adapter passage 414 on the plane where the cover plate 41 is located in a projection of the core 1 on the plane where the cover plate 41 is located, the fourth interface 416 is disposed on a side of the cover plate 41 away from the base 42, a projection of the fourth interface 416 on the plane where the bottom wall of the sixth recess 424 is located at the other end of the sixth recess 424, a projection of the fourth interface 416 on the plane where the cover plate 41 is located outside a projection of the core 1 on the plane where the cover plate 41 is located, the heat exchange device further includes a second adapter tube 6, the second adapter tube 6 is communicated with the fourth interface tube 416, so as to facilitate installation of the fourth adapter tube, make a structure of the heat exchange device more compact, and save an installation space of the heat exchange device.

The sixth diversion channel communicates the fourth port 416 with the seventh through-passage 414, the bottom plate 3 includes a seventh through-hole 34, the seventh through-hole 34 is aligned with the seventh through-passage 414, and the seventh through-hole 34 communicates the seventh through-passage 414 with the fourth port.

After flowing into the first groove 141 from the first port 425, the heat exchange medium flows into the third flow channel 16 through the fourth adapter channel 411, and then flows into the second channel 213 through the second adapter channel 144.

When the temperature of the heat exchange medium entering the second channel 213 is within the temperature range set by the heat exchange medium, the thermal element cuts off the second channel 213 and the first channel 212 under the elastic force of the elastic element, and makes the third channel 214 and the second channel 213 communicate with each other, that is, the medium (for example, engine oil) flowing into the first flow channel flows out of the heat exchange device without or with little heat exchange (for example, directly flows back to the transmission);

when the temperature of the heat exchange medium entering the second channel 213 is higher than the set temperature range of the heat exchange medium, the thermal element cuts off the second channel 213 and the third channel 214 under the elastic force of the elastic element, and the second channel 213 is communicated with the first channel 212, that is, the heat exchange medium flowing into the heat exchange device flows into the first circulation channel through the third circulation channel, and the heat exchange medium flowing into the heat exchange device exchanges heat with another heat exchange medium flowing into the second circulation channel and then flows out of the heat exchange device. Through with fluid control assembly 2 and core 1 fixed connection, saved fluid control assembly 2 and passed through the pipeline and be connected with core 1, saved fluid control assembly 2 and core 1's installation space, reduced the installation degree of difficulty between them.

Taking the heat exchange medium entering the first interplate channels as transmission oil as an example, when the temperature of the transmission oil is too high, under the action of the thermal element and the elastic element, the second channel 213 is communicated with the first channel 212, the second channel 213 is not communicated with the third channel 214, and at this time, the flow path of the transmission oil is: the first port 425 → the third groove 421 → the third flow channel 16 → the second through hole 132 → the second adapter channel 144 → the second channel 213 → the first channel 212 → the first adapter channel 143 → the first flow-directing portion → the first port 121 → the first inter-plate channel → the second port 151 → the fifth adapter channel 412 → the fourth groove 422 → the second port 426, so as to return to the transmission case after exchanging heat with the heat exchange medium flowing through the second inter-plate.

When the temperature of the transmission oil is in a set working temperature range, under the action of the thermal element and the elastic element, the second channel 213 is not communicated with the first channel 212, the second channel 213 is communicated with the third channel 214, and at the moment, the flow path of the transmission oil is as follows: first port 425 → third groove 421 → third flow channel 16 → second through hole 132 → second adapter channel 144 → second channel 213 → third channel 214 → third adapter channel 145 → second flow directing channel → third through hole 133 → second port 151 → fifth adapter channel 412 → fourth groove 422 → second port 426, and the transmission oil flows back to the transmission directly through the second port 151 without flowing through the first plate-to-plate channel, i.e. without exchanging heat with the heat exchange medium flowing through the second plate-to-plate channel.

Of course, the position of the thermal element may also be adjusted as required, so that the second channel 213 is communicated with both the first channel 212 and the third channel 214, so that a portion of the transmission oil flows through the first interplate channels, exchanges heat with the heat exchange medium flowing through the second interplate channels, and then flows back to the transmission, and a portion of the transmission oil directly flows back to the transmission through the second channel, so that the transmission oil is within the required working temperature range, which is not described herein again.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A heat exchange device comprising a core, the core comprising a first flow channel and a second flow channel isolated from each other, the first flow channel comprising a first port and a second port, the heat exchange device further comprising a first port and a second port, wherein the first port and the second port are connected to each other,

the core further comprises a third flow-through passage extending through the heat exchange region of the core;

the heat exchange device further comprises a fluid control assembly, the fluid control assembly comprises a valve body, a thermal element and an elastic element, the valve body is fixed with the core body, the valve body further comprises a first channel, a second channel and a third channel, the second channel can be communicated with the first channel and/or the second channel can be communicated with the third channel through actions of the thermal element and the elastic element, one end of the third circulation channel is communicated with the second channel, the other end of the third circulation channel is communicated with the first interface, the first channel is communicated with the first pore channel, one end of the second pore channel is communicated with the third channel, and the other end of the second pore channel is communicated with the second interface.

2. The heat exchange device of claim 1, wherein the core further comprises an adapter, the adapter comprising a first adapter channel, a second adapter channel, a third adapter channel, the second adapter channel being positioned between the first adapter channel and the third adapter channel, the adapter further comprising a first groove and a second groove, the first groove being in communication with the first port, the second groove being in communication with the second port, the first adapter channel being in communication with the first channel and the first groove, the second adapter channel being in communication with the second channel and the third flow channel, the third adapter channel being in communication with the third channel and the second groove.

3. The heat exchange device of claim 2, further comprising a base, wherein the base comprises a third groove and a fourth groove, a side of the base away from the base plate is provided with a first port and a second port, the third groove communicates the third circulation channel with the first port, and the fourth groove communicates the second duct with the second port.

4. The heat exchange device of claim 3, further comprising a cover plate, the cover plate comprising a fourth transition channel and a fifth transition channel, the fourth transition channel communicating the third groove and the third flow channel, the fifth transition channel communicating the fourth groove and the second porthole;

the projection of the fourth switching channel on the plane where the bottom wall of the third groove is located at one end of the third groove, the projection of the first interface on the plane where the bottom wall of the third groove is located at the other end of the third groove, the projection of the fifth switching channel on the plane where the bottom wall of the fourth groove is located at one end of the fourth groove, and the projection of the second interface on the plane where the bottom wall of the fourth groove is located at the other end of the fourth groove.

5. The heat exchange device of claim 4, wherein the second flow passage comprises a third cell, the core further comprising an end plate, a portion of the end plate corresponding to the third cell sealing the third cell;

the cover plate comprises a sixth switching channel and a third interface, the base further comprises a fifth groove, the sixth switching channel is communicated with the fifth groove and the third hole channel, and the third interface is communicated with the fifth groove;

the projection of the sixth switching channel on the plane where the bottom wall of the fifth groove is located at one end of the fifth groove, the third interface is arranged on one side, away from the base, of the cover plate, the projection of the third interface on the plane where the bottom wall of the fifth groove is located at the other end of the fifth groove, and the projection of the third interface on the plane where the cover plate is located outside the projection of the core body on the plane where the cover plate is located.

6. The heat exchange device of claim 5, wherein the second flow passage comprises a fourth cell, a portion of the end plate corresponding to the fourth cell sealing the fourth cell;

the cover plate comprises a seventh switching channel and a fourth interface, the base further comprises a sixth groove, the seventh switching channel is communicated with the sixth groove and the fourth pore channel, and the fourth interface is communicated with the sixth groove;

the projection of the seventh switching channel on the plane where the bottom wall of the sixth groove is located at one end of the sixth groove, the fourth interface is arranged on one side, away from the base, of the cover plate, the projection of the fourth interface on the plane where the bottom wall of the sixth groove is located at the other end of the sixth groove, and the projection of the fourth interface on the plane where the cover plate is located outside the projection of the core body on the plane where the cover plate is located.

7. The heat exchange device according to claim 6, wherein the heat exchange medium flows into the third flow channel through the fourth switching channel after flowing into the first groove from the first port, and then flows into the second channel through the second switching channel;

when the temperature of the heat exchange medium entering the second channel is within the set temperature range of the heat exchange medium, the heat exchange medium flows into the second pore channel through the third channel, the heat exchange medium flowing into the second pore channel flows into the fourth groove through the fifth adapter channel, and then flows out of the heat exchange device from the second interface;

when the temperature of the heat exchange medium entering the second channel is higher than the set temperature range of the heat exchange medium, the heat exchange medium flows into the first pore channel through the first channel, the heat exchange medium flowing into the first pore channel exchanges heat with the heat exchange medium flowing into the second circulation channel and then flows into the second pore channel, and the heat exchange medium flowing into the second pore channel flows into the fourth groove through the fifth switching channel and then flows out of the heat exchange device from the second interface.

8. The heat exchange device according to any one of claims 1 to 7, wherein the core comprises a plurality of first plates and a plurality of second plates which are arranged in a stacked manner, the first plates comprise first middle parts and corner holes positioned in the first middle parts, the second plates comprise second middle parts and corner holes positioned in the second middle parts, and the corner holes in the first middle parts and the corner holes in the second middle parts are stacked to form a first hole channel, a second hole channel, a third hole channel and a fourth hole channel;

the first middle part comprises a first flow through hole, a first blocking part extends towards a second middle part from the hole wall of the first flow through hole, one end, far away from the first middle part, of the first blocking part is hermetically connected with the second middle part, the second middle part comprises a second flow through hole, and the projection of the second flow through hole on the plane of the first middle part is located in the projection of the first blocking part on the plane of the first middle part;

a second blocking part extends towards the first middle part from the hole wall of the second flow through hole, one end, far away from the second middle part, of the second blocking part is hermetically connected with the first middle part, and the projection of the first flow through hole on the plane where the second middle part is located in the projection of the second blocking part on the plane where the first middle part is located;

the first blocking part comprises a fourth channel, the second blocking part comprises a fifth channel, and the first flow through hole, the fourth channel, the second flow through hole and the fifth channel are communicated to form the third circulation channel.

9. The heat exchange device of claim 8, wherein the corner holes in the first intermediate portion forming the first portholes and the corner holes in the first intermediate portion forming the second portholes are diagonally arranged, the corner holes in the first intermediate portion forming the third portholes and the corner holes in the first intermediate portion forming the fourth portholes are diagonally arranged, and the center of the first flow through hole is substantially equidistant from the center of each corner hole in the first intermediate portion.