A heat exchange device

Abstract

The present invention provides a heat exchange device, including a core body, the core body including a first circulation channel and a second circulation channel, the first circulation channel including a first hole and a second hole, the heat exchange device also including a first interface and a second interface, the core body also including a third circulation channel, the heat exchange device also including a fluid control component, the fluid control component including a valve body, the valve body is fixed to the core body, the valve body also includes a first channel, a second channel and a third channel, through the action of the thermal element and the elastic element, the second channel can be connected to the first channel and / or the second channel can be connected to the third channel, the first channel is connected to the first hole, one end of the second hole is connected to the third channel, and the other end of the second hole is connected to the second interface, eliminating the need for the fluid control component to be connected to the core body through a pipeline.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange, and in particular to a heat exchange device. Background Art

[0002] At present, plate heat exchangers are widely used in automobiles. One application of plate heat exchangers is to use plate heat exchangers for heat exchange between transmission oil or engine oil and coolant, that is, the plate heat exchanger serves as an oil cooler, and a thermostat is used to control whether the transmission oil or engine oil passes through the oil cooler, thereby cooling the transmission oil or engine oil. The thermostat is connected to the transmission or engine and the oil cooler through pipelines respectively. Summary of the Invention

[0003] An object of the present invention is to provide a heat exchange device which simplifies pipeline connection by fixedly connecting a fluid control component to a core.

[0004] The present invention provides a heat exchange device, including a core body, the core body including a first circulation channel and a second circulation channel isolated from each other, the first circulation channel including a first hole and a second hole, the heat exchange device also including a first interface and a second interface, the core body also including a third circulation channel, the third circulation channel runs through the heat exchange area of the core body; the heat exchange device also includes a fluid control component, the fluid control component includes a valve body, a thermodynamic element and an elastic element, the valve body is fixed to the core body, the valve body also includes a first channel, a second channel and a third channel, one end of the third circulation channel is connected to the second channel, the other end of the third circulation channel is connected to the first interface, the first channel is connected to the first hole, one end of the second hole is connected to the third channel, and the other end of the second hole is connected to the second interface.

[0005] The present invention provides a heat exchange device, in which the valve body of the fluid control component is fixed to the core body, and the first channel of the valve body is connected to the first hole, the second channel is connected to the third flow channel, and the third channel is connected to the second hole, thereby eliminating the pipeline connecting the fluid control component and the core body, and allowing the fluid control component to not be provided with an interface for an external pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a three-dimensional diagram of a heat exchange device of the present invention;

[0007] Figure 2 It is an exploded view of a heat exchange device of the present invention;

[0008] Figure 3 is a top view of a heat exchange device of the present invention;

[0009] Figure 4yes Figure 3 Cross-sectional view of AA;

[0010] Figure 5 is a cross-sectional view of a valve body of a heat exchange device of the present invention;

[0011] Figure 6 This is a schematic structural diagram of an adapter for a heat exchange device according to the present invention;

[0012] Figure 7 It is a structural schematic diagram of an end plate of a heat exchange device of the present invention;

[0013] Figure 8 This is a schematic structural diagram of a first plate of a heat exchange device according to the present invention;

[0014] Figure 9 This is a schematic structural diagram of a bottom plate of a heat exchange device according to the present invention;

[0015] Figure 10 This is a structural schematic diagram of a cover plate of a heat exchange device of the present invention;

[0016] Figure 11 It is a structural schematic diagram of a base of a heat exchange device of the present invention.

[0017] Reference numerals:

[0018] Core 1,

[0019] First plate 11, first middle portion 111, corner hole 112, first flow hole 113, first blocking portion 114,

[0020] First channel 121, end plate 13, first through hole 131, second through hole 132, third through hole 133,

[0021] Transfer seat 14, first groove 141, second groove 142, first transfer channel 143, second transfer channel 144, third transfer channel 145,

[0022] The second channel 151,

[0023] The third circulation channel 16,

[0024] Fluid control assembly 2, valve body 21, installation cavity 211, first channel 212, second channel 213, third channel 214,

[0025] Bottom plate 3, fourth through hole 31, fifth through hole 32, sixth through hole 33, seventh through hole 34,

[0026] Cover plate 41, fourth transfer channel 411, fifth transfer channel 412, sixth transfer channel 413, seventh transfer channel 414, third interface 415, fourth interface 416,

[0027] Base 42, third groove 421, fourth groove 422, fifth groove 423, sixth groove 424, first interface 425, second interface 426,

[0028] The first connection is 5, and the second connection is 6. DETAILED DESCRIPTION

[0029] The following describes embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0030] refer to Figure 1 、 Figure 8 The core 1 includes a plurality of first plates 11 and a plurality of second plates that are stacked. The first plate 11 includes a first middle portion 111 and a corner hole 112 located in the first middle portion 111. The shape of the first middle portion 111 is rectangular. The number of the corner holes 112 is 4. The 4 corner holes 112 are respectively arranged adjacent to the corners of the first middle portion 111. The first middle portion 111 is provided with a first flow hole 113. The shape of the first flow hole is circular, square, etc. Here, the circular shape of the first flow hole 113 is taken as an example. The center of the first flow hole 113 coincides with the center of the first plate 11, that is, the first flow hole 113 is located in the middle of the first middle portion 111.

[0031] The structure of the second plate is the same or similar to that of the first plate 11. The second plate includes 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 channel 121, a second channel 151, a third channel and a fourth channel. The first inter-plate channel is formed between the first middle part and the second middle part, and the second inter-plate channel is formed between the second middle part and the first middle part. The first inter-plate channel and the second inter-plate channel are the heat exchange areas of the core. The core 1 includes a first circulation channel and a second circulation channel isolated from each other. The first circulation channel includes a first channel 121, a first inter-plate channel and a second channel 151. The first plate channel connects the first channel 121 and the second channel 151. The second fluid channel includes a third channel, a second inter-plate channel and a fourth channel. The second inter-plate channel connects the third channel and the fourth channel. The hole wall of the first circulation hole 113 is extended toward the second middle part to be provided with a first blocking portion 114, and one end of the first blocking portion 114 away from the first middle part 111 is sealed and connected to the second middle part. The second middle part includes a second circulation hole, and the projection of the second circulation hole on the plane where the first middle part 111 is located is located within the projection of the first blocking portion 114 on the plane where the first middle part 111 is located. The hole wall of the second circulation hole is extended toward the first middle part 111 to be provided with a second blocking portion, and one end of the second blocking portion away from the second middle part is sealed and connected to the first middle part 111. The first circulation hole 113 The projection of the plane where the second middle part is located is located within the projection of the plane where the first middle part 111 is located. The first barrier part 114 includes a fourth channel, and the second barrier part includes a fifth channel. The first circulation hole 113, the fourth channel, the second circulation hole and the fifth channel are connected to form a third circulation channel 16. That is, the third circulation channel 16 extends along the direction of stacking of the first plate 11 and the second plate, and the third circulation channel 16 is not connected with the first inter-plate channel, and the third circulation channel 16 is not connected with the second inter-plate channel, which facilitates the assembly of the core 1 and saves costs.

[0032] The corner holes 112 on the first middle portion 111 that form the first channel 121 and the corner holes 112 on the first middle portion 111 that form the second channel 151 are diagonally arranged, the corner holes 112 on the first middle portion 111 that form the third channel and the corner holes 112 on the first middle portion 111 that form the fourth channel are diagonally arranged, and the first flow hole 113 is roughly located at the center of the first plate 11, which facilitates the installation of the fluid control component 2 and saves costs.

[0033] refer to Figure 2-Figure 3 、 Figure 6-Figure 7The core 1 also includes a transfer seat 14 and an end plate 13. The end plate 13 is located at the top of the core 1, that is, the end plate 13 is welded to the first plate 11 or the second plate located at the upper end (along the direction of plate stacking). 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 channel 121, the second through hole 132 is aligned with the third circulation channel 16, and the third through hole 133 is aligned with the second channel 151. The first through hole 131 is connected to the first channel 121, the second through hole 132 is connected to the third circulation channel 16, and the third through hole 133 is connected to the second channel 151.

[0034] The adapter seat 14 includes a first groove 141 and a second groove 142. After the adapter seat 14 is connected to the end plate 13 (preferably by welding), a first drainage channel is formed in the first groove 141, and a second drainage channel is formed in the second groove 142, making the structure of the heat exchange device compact and easy to install.

[0035] The adapter seat 14 includes a first adapter channel 143, a second adapter channel 144, and a third adapter channel 145. The projection of the first through hole 131 on the plane where the bottom wall of the first groove 141 is located is located at one end of the first groove 141, and the projection of the first adapter channel 143 on the plane where the bottom wall of the first groove 141 is located is located at the other end of the first groove 141. The projection of the third through hole 133 on the plane where the bottom wall of the second groove 142 is located is located at one end of the second groove 142, and the third adapter channel 145 is located at the bottom of the second groove 142. The projection of the plane where the bottom wall is located is located at the other end of the second groove 142. The first drainage channel connects the first through hole 131 and the first transfer channel 143. The first transfer channel 143 connects the first drainage channel and the first channel 212. The second through hole 132 connects the third circulation channel 16 and the second transfer channel 144. The second transfer channel 144 is connected to the second channel 213. The second drainage channel connects the third through hole 133 and the third transfer channel 145. The third transfer channel 145 connects the second drainage channel and the third channel 214.

[0036] refer to Figure 2-Figure 4 、 Figure 5 The heat exchange device also includes a fluid control component 2, which includes a valve body 21, a thermodynamic element and an elastic element. The valve body 21 is fixedly connected to the adapter seat 14. The fixed connection includes welding, threaded bolt connection, etc. The valve body 21 includes an installation cavity 211, and the thermodynamic element and the elastic element are located in the installation cavity 211. The valve body 21 also includes a first channel 212, a second channel 213 and a third channel 214. The second channel 213 is connected to the second transfer channel 144, one end of the first channel 212 is aligned with one end of the first transfer channel 143, and one end of the third channel 214 is aligned with one end of the third transfer channel 145.

[0037] The second channel can be connected to the first channel and / or the second channel can be connected to the third channel through the action of the thermal element and the elastic element.

[0038] The valve body 21 of the fluid control component is fixed to the core body 1, and the first channel 212 of the valve body 21 is connected to the first channel 121, the second channel 213 is connected to the third circulation channel 16, and the third channel 214 is connected to the second channel 151, eliminating the pipeline connecting the fluid control component and the core body 1, so that the fluid control component does not need to be equipped with an interface for an external pipeline.

[0039] refer to Figure 2 、 Figures 8-11 The heat exchange device also includes a bottom plate 3 and a mounting plate assembly. The bottom plate 3 is located on the side of the core 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 respectively to improve the sealing of the heat exchange device. The base 42 includes a third groove 421 and a fourth groove 422. 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.

[0040] The bottom plate 3 includes a fourth through hole 31 and a fifth through hole 32. The fourth through hole 31 is connected to the third circulation channel 16, and the fifth through hole 32 is connected to the second channel 151. The cover plate 41 includes a fourth transfer channel 411 and a fifth transfer channel 412. The fourth through hole 31 is aligned with the fourth transfer channel 411, and the fourth through hole 31 is connected to the fourth transfer channel 411. The fifth through hole 32 is aligned with the fifth transfer channel 412, and the fifth through hole 32 is connected to the fifth transfer channel 412. The fourth transfer channel is connected to the third drainage channel, and the fifth transfer channel 412 is connected to the fourth drainage channel.

[0041] The base 42 is provided with a first interface 425 and a second interface 426 on the side away from the core body 1, the third drainage channel is connected to the first interface 425, the fourth drainage channel is connected to the second interface 426, the projection of the fourth transfer channel 411 on the plane where the bottom wall of the third groove 421 is located 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 is located at the other end of the third groove 421, the projection of the fifth transfer channel 412 on the plane where the bottom wall of the fourth groove 422 is located 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 is located at the other end of the fourth groove 422.

[0042] refer to Figure 2 、 Figures 8-11The portion of the end plate 13 corresponding to the third channel seals the third channel. The base 42 further includes a fifth groove 423 . After the cover plate 41 is connected to the base 42 , a fifth drainage channel is formed in the fifth groove 423 .

[0043] The cover plate 41 includes a sixth transfer channel 413 and a third interface 415. The projection of the sixth transfer channel 413 on the plane where the bottom wall of the fifth groove 423 is located is located at one end of the fifth groove 423. The projection of the sixth transfer channel 413 on the plane where the cover plate 41 is located is located inside the projection of the core 1 on the plane where the cover plate 41 is located. The third interface 415 is arranged on the side of the cover plate 41 away from the base 42. The projection of the third interface 415 on the plane where the bottom wall of the fifth groove 423 is located 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 is outside the projection of the core 1 on the plane where the cover plate 41 is located. The heat exchange device also includes a first connecting pipe 5. The first connecting pipe 5 is connected to the third interface 415, which facilitates the installation of the third connecting pipe, makes the structure of the heat exchange device more compact, and saves the installation space of the heat exchange device.

[0044] The fifth drainage channel connects the third interface 415 and the sixth transfer channel 413 . The bottom plate 3 includes a sixth through hole 33 . The sixth through hole 33 is aligned with the sixth transfer channel 413 . The sixth through hole 33 connects the sixth transfer channel 413 and the third channel.

[0045] refer to Figure 2 、 Figures 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. After the cover plate 41 is connected to the base 42, a sixth drainage channel is formed in the sixth groove 424.

[0046] The cover plate 41 includes a seventh transfer channel 414 and a fourth interface 416. The projection of the seventh transfer channel 414 on the plane where the bottom wall of the sixth groove 424 is located is located at one end of the sixth groove 424. The projection of the seventh transfer channel 414 on the plane where the cover plate 41 is located is located inside the projection of the core 1 on the plane where the cover plate 41 is located. The fourth interface 416 is arranged on the side of the cover plate 41 away from the base 42. The projection of the fourth interface 416 on the plane where the bottom wall of the sixth groove 424 is located is located at the other end of the sixth groove 424. The projection of the fourth interface 416 on the plane where the cover plate 41 is located is outside the projection of the core 1 on the plane where the cover plate 41 is located. The heat exchange device also includes a second pipe 6, which is connected to the fourth interface 416 to facilitate the installation of the fourth pipe, making the structure of the heat exchange device more compact and saving the installation space of the heat exchange device.

[0047] The sixth drainage channel is connected to the fourth interface 416 and the seventh transfer channel 414. The bottom plate 3 includes a seventh through hole 34. The seventh through hole 34 is aligned with the seventh transfer channel 414. The seventh through hole 34 is connected to the seventh transfer channel 414 and the fourth channel.

[0048] After the heat exchange medium flows from the first interface 425 into the first groove 141 , it flows into the third circulation channel 16 through the fourth transfer channel 411 , and then flows into the second channel 213 through the second transfer channel 144 .

[0049] When the temperature of the heat exchange medium entering the second channel 213 is within the set temperature range of the heat exchange medium, the thermodynamic element, under the action of the elastic force of the elastic element, isolates the second channel 213 from the first channel 212 and connects the third channel 214 with the second channel 213. In other words, the medium (e.g., engine oil) flowing into the first flow channel flows out of the heat exchange device without or almost without heat exchange (e.g., directly flows back to the gearbox);

[0050] When the temperature of the heat exchange medium entering the second channel 213 is higher than the temperature range set for the heat exchange medium, the thermodynamic element, under the action of the elastic force of the elastic element, separates the second channel 213 from the third channel 214 and connects the second channel 213 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 before flowing out of the heat exchange device. The above working conditions can be set according to specific needs and will not be elaborated here. By fixedly connecting the fluid control component 2 to the core 1, the fluid control component 2 is eliminated from being connected to the core 1 through a pipeline, saving the installation space of the fluid control component 2 and the core 1, and reducing the difficulty of installation of both.

[0051] Taking the transmission oil as the heat exchange medium entering the first inter-plate channel as an example, when the temperature of the transmission oil is too high, under the action of the thermodynamic element and the elastic element, the second channel 213 is connected to the first channel 212, and the second channel 213 is disconnected from the third channel 214. At this time, the flow path of the transmission oil is: first interface 425 → third groove 421 → third circulation channel 16 → second through hole 132 → second transfer channel 144 → second channel 213 → first channel 212 → first transfer channel 143 → first guide portion → first channel 121 → first inter-plate channel → second channel 151 → fifth transfer channel 412 → fourth groove 422 → second interface 426, thereby exchanging heat with the heat exchange medium flowing through the second inter-plate channel and then flowing back to the transmission.

[0052] When the transmission oil temperature is within the set operating temperature range, under the action of the thermodynamic element and the elastic element, the second channel 213 is disconnected from the first channel 212, and the second channel 213 is connected to the third channel 214. At this time, the transmission oil flow path is: first port 425 → third groove 421 → third circulation channel 16 → second through hole 132 → second transfer channel 144 → second channel 213 → third channel 214 → third transfer channel 145 → second drainage channel → third through hole 133 → second channel 151 → fifth transfer channel 412 → fourth groove 422 → second port 426. The transmission oil does not flow through the first inter-plate channel, that is, does not exchange heat with the heat exchange medium flowing through the second inter-plate channel, and directly flows back to the transmission through the second channel 151.

[0053] Of course, the position of the thermal element can also be adjusted as needed so that the second channel 213 is connected to both the first channel 212 and the third channel 214, so that part of the transmission oil flows through the first inter-plate channel and exchanges heat with the heat exchange medium flowing through the second inter-plate channel before returning to the transmission, and part of the oil flows directly back to the transmission through the second channel, so that the transmission oil is within the required operating temperature range. This will not be elaborated here.

[0054] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments 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 hole channel and a second hole channel, the heat exchange device further comprising a first interface and a second interface, characterized in that: The core further includes a third circulation channel, wherein the third circulation channel runs through the heat exchange area of the core; The heat exchange device also includes a fluid control component, which includes a valve body, a thermal element and an elastic element. The valve body is fixed to the core body. The valve body also includes a first channel, a second channel and a third channel. Through the action of the thermal element and the elastic element, the second channel can be connected to the first channel and / or the second channel can be connected to the third channel. One end of the third circulation channel is connected to the second channel, and the other end of the third circulation channel is connected to the first interface. The first channel is connected to the first channel, one end of the second channel is connected to the third channel, and the other end of the second channel is connected to the second interface.

2. The heat exchange device according to claim 1, characterized in that The core body also includes a transfer seat, which includes a first transfer channel, a second transfer channel, and a third transfer channel. The second transfer channel is located between the first transfer channel and the third transfer channel. The transfer seat also includes a first groove and a second groove. The first groove is connected to the first channel, the second groove is connected to the second channel, the first transfer channel is connected to the first channel and the first groove, the second transfer channel is connected to the second channel and the third circulation channel, and the third transfer channel is connected to the third channel and the second groove.

3. The heat exchange device according to claim 2, characterized in that: The heat exchange device also includes a base, which includes a third groove and a fourth groove. A first interface and a second interface are provided on the side of the base away from the core. The third groove connects the third circulation channel and the first interface, and the fourth groove connects the second channel and the second interface.

4. The heat exchange device according to claim 3, characterized in that: The heat exchange device further includes a cover plate, the cover plate including a fourth transfer channel and a fifth transfer channel, the fourth transfer channel communicating with the third groove and the third circulation channel, the fifth transfer channel communicating with the fourth groove and the second channel; The projection of the fourth transfer channel on the plane where the bottom wall of the third groove is located 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 is located at the other end of the third groove, the projection of the fifth transfer channel on the plane where the bottom wall of the fourth groove is located 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 is located at the other end of the fourth groove.

5. The heat exchange device according to claim 4, characterized in that: The second circulation channel includes a third hole, and the core further includes an end plate, and a portion of the end plate corresponding to the third hole seals the third hole; The cover plate includes a sixth transfer channel and a third interface, and the base further includes a fifth groove, the sixth transfer channel communicates with the fifth groove and the third channel, and the third interface communicates with the fifth groove; The projection of the sixth transfer channel on the plane where the bottom wall of the fifth groove is located is located at one end of the fifth groove, the third interface is arranged on the side of the cover plate away from the base, the projection of the third interface on the plane where the bottom wall of the fifth groove is located 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 is located outside the projection of the core on the plane where the cover plate is located.

6. The heat exchange device according to claim 5, characterized in that: The second circulation channel includes a fourth hole, and the portion of the end plate corresponding to the fourth hole seals the fourth hole; The cover plate includes a seventh transfer channel and a fourth interface, and the base further includes a sixth groove, the seventh transfer channel communicates with the sixth groove and the fourth channel, and the fourth interface communicates with the sixth groove; The projection of the seventh transfer channel on the plane where the bottom wall of the sixth groove is located is located at one end of the sixth groove, the fourth interface is arranged on the side of the cover plate away from the base, the projection of the fourth interface on the plane where the bottom wall of the sixth groove is located 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 is located outside the projection of the core on the plane where the cover plate is located.

7. The heat exchange device according to claim 6, characterized in that After the heat exchange medium flows from the first interface into the first groove, it flows into the third circulation channel through the fourth transfer channel, and then flows into the second channel through the second transfer 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 hole channel through the third channel, and the heat exchange medium flowing into the second hole channel flows into the fourth groove through the fifth transfer 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 temperature range set for the heat exchange medium, the heat exchange medium flows into the first channel through the first channel, the heat exchange medium flowing into the first channel exchanges heat with the heat exchange medium flowing into the second circulation channel and then flows into the second channel, the heat exchange medium flowing into the second channel flows into the fourth groove through the fifth transfer 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, characterized in that: The core body includes a plurality of first plates and a plurality of second plates stacked together, wherein the first plate includes a first middle portion and a corner hole located in the first middle portion, and the second plate includes a second middle portion and a corner hole located in the second middle portion, and the corner holes on the first middle portion and the corner holes on the second middle portion are stacked to form a first channel, a second channel, a third channel, and a fourth channel; The first central portion includes a first circulation hole, a first blocking portion is provided on a hole wall of the first circulation hole extending toward the second central portion, an end of the first blocking portion away from the first central portion is sealedly connected to the second central portion, and the second central portion includes a second circulation hole, a projection of the second circulation hole on the plane where the first central portion is located is located within a projection of the first blocking portion on the plane where the first central portion is located; A second blocking portion is provided on the wall of the second circulation hole extending toward the first central portion, an end of the second blocking portion away from the second central portion is sealedly connected to the first central portion, and a projection of the first circulation hole on the plane where the second central portion is located is located within a projection of the second blocking portion on the plane where the first central portion is located; The first blocking portion includes a fourth channel, the second blocking portion includes a fifth channel, and the first circulation hole, the fourth channel, the second circulation hole, and the fifth channel are connected to form the third circulation channel.

9. The heat exchange device according to claim 8, characterized in that The corner holes on the first middle portion that form the first channel and the corner holes on the first middle portion that form the second channel are diagonally arranged, the corner holes on the first middle portion that form the third channel and the corner holes on the first middle portion that form the fourth channel are diagonally arranged, and the center of the first flow hole is the same distance from the center of each corner hole on the first middle portion.

Images