CN216384758U

CN216384758U - Composite heat dissipation side plate and thermoacoustic refrigeration refrigerator

Info

Publication number: CN216384758U
Application number: CN202123086715.8U
Authority: CN
Inventors: 陈小平; 梁起; 李毅
Original assignee: Foshan Viomi Electrical Technology Co Ltd
Current assignee: Foshan Viomi Electrical Technology Co Ltd
Priority date: 2021-12-08
Filing date: 2021-12-08
Publication date: 2022-04-26
Anticipated expiration: 2031-12-08

Abstract

The utility model discloses a composite heat dissipation side plate, which is used for being arranged on the side wall of a thermoacoustic refrigeration refrigerator and comprises an outer side plate, a heat dissipation plate and a heat dissipation plate, wherein the outer side plate is arranged on the heat dissipation plate; the inner plate is provided with a groove flow channel, the outer side plate and the inner plate are combined to cover the groove flow channel, and a first liquid inlet and a first liquid outlet which are communicated with the groove flow channel are formed in the inner plate. The composite heat-dissipation side plate provided by the utility model utilizes the groove flow channel to guide the secondary refrigerant, the heat carried by the secondary refrigerant can be discharged to the environment through the inner plate and the outer plate (particularly the outer plate), compared with the traditional heat-dissipation coil pipe, the composite heat-dissipation side plate has better heat exchange effect, and the structure formed by the outer plate and the inner plate in a covering manner can facilitate the design and processing of the groove flow channel, thereby reducing the processing difficulty and the production cost of parts. The utility model also provides a thermoacoustic refrigeration refrigerator with the composite box heat dissipation side plate.

Description

Composite heat dissipation side plate and thermoacoustic refrigeration refrigerator

Technical Field

The utility model relates to the technical field of refrigerators, in particular to a composite radiating side plate and a thermoacoustic refrigeration refrigerator.

Background

In the existing thermoacoustic refrigeration refrigerator, a main heat dissipation structure of the refrigerator generally adopts a heat dissipation coil pipe and is arranged at the back of a refrigerator body in an exposed manner; or the metal panel is arranged on the side wall or the top of the refrigerator body and is used for covering so as to avoid scalding the user. However, it has the following problems:

(1) the overall heat dissipation efficiency is poor;

(2) local overheating is easy to occur at the position corresponding to the heat dissipation coil;

(3) the heat dissipation coil is made of copper materials, and the cost is high.

SUMMERY OF THE UTILITY MODEL

In order to overcome at least one defect in the prior art, the utility model provides a composite radiating side plate which can be arranged on the side wall of a thermoacoustic refrigerator to replace the existing radiating coil pipe, does not need to arrange a metal outer side plate on the side wall of the thermoacoustic refrigerator again, has high radiating efficiency and can effectively reduce the overall cost of the thermoacoustic refrigerator.

The technical scheme adopted by the utility model for solving the problems is as follows:

a composite heat sink side panel for mounting on a side wall of a thermoacoustic refrigeration refrigerator, comprising:

an outer panel;

the inner plate is provided with a groove flow channel, the outer side plate and the inner plate are combined to cover the groove flow channel, and a first liquid inlet and a first liquid outlet which are communicated with the groove flow channel are formed in the inner plate.

The composite heat-dissipation side plate provided by the utility model utilizes the groove flow channel to guide the secondary refrigerant, the heat carried by the secondary refrigerant can be discharged to the environment through the inner plate and the outer plate (particularly the outer plate), compared with the traditional heat-dissipation coil pipe, the composite heat-dissipation side plate has better heat exchange effect, and the structure formed by the outer plate and the inner plate in a covering manner can facilitate the design and processing of the groove flow channel, thereby reducing the processing difficulty and the production cost of parts.

Further, the groove flow channel comprises a first area, a second area and a third area, wherein the first area and the second area are arranged side by side, the third area is communicated with one end of the first area and one end of the second area, the first liquid inlet is communicated with one end, far away from the third area, of the first area, and the first liquid outlet is communicated with one end, far away from the third area, of the second area.

From this, through the setting between the three region to combine the position setting of first inlet and first liquid outlet, with the water conservancy diversion route of extension recess runner, make the heat of secondary refrigerant can be relatively even distribute to inner panel and outer panel on, improve the heat exchange efficiency of compound heat dissipation curb plate.

Further, the first region, the second region and the third region are all formed by inwards recessing one surface of the inner plate close to the outer side plate.

Therefore, the bonding area between the inner plate and the outer plate is kept at a large value, and the sealing effect is enhanced.

Furthermore, a plurality of first flow guiding ribs arranged side by side are arranged in the first area and/or the second area, and the first flow guiding ribs extend along the flow guiding direction of the groove flow channel.

From this, can increase the heat transfer area of recess runner through first water conservancy diversion muscle, and can further improve the heat exchange efficiency of compound heat dissipation curb plate through the distribution of first water conservancy diversion muscle effective control secondary refrigerant.

Further, the first flow guiding rib is formed by protruding the bottom surface of the first area and/or the second area towards the outer side plate, and the surface of the first flow guiding rib is abutted to the side surface of the outer side plate.

From this, ensure that the inner panel has certain intensity, and the outer panel can not appear warping when covering with the inner panel mutually, reduce the material of inner panel simultaneously, save the cost, on the other hand can also restrict the coolant between the different first water conservancy diversion muscle and circulate each other, avoids excessively concentrating of coolant in order to influence whole radiating effect.

Furthermore, the inner plate is made of plastic plates through plastic suction molding.

Therefore, the production of the inner plate is convenient, and the cost is low.

Further, the outer side plate is made of metal plate, and the inner plate and the outer side plate are fixed through sound wave welding or gluing.

Therefore, the heat dissipation efficiency of the outer side plate is enhanced, and the requirement on sealing performance is met with lower cost.

The utility model also provides a thermoacoustic refrigeration refrigerator, comprising:

the composite heat dissipation side plate is arranged on at least one side of the refrigerator body;

a thermoacoustic refrigerator having a hot end and a cold end;

the low-temperature circulation loop is used for conveying the cold energy of the cold end into the refrigerator body;

and the normal-temperature circulation loop is used for dissipating the waste heat of the hot end outwards, and the composite heat dissipation side plates are connected in series on the normal-temperature circulation loop.

Therefore, the waste heat of the thermoacoustic refrigerator is discharged to the environment by utilizing the composite radiating side plate, the radiating efficiency is high, the production cost is low, the assembly is convenient, and the overall cost of the thermoacoustic refrigerator can be effectively reduced.

Further, the refrigerator further comprises a drying tray heat dissipation structure and an anti-dew structure located at a door frame of the refrigerator body, wherein the drying tray heat dissipation structure and the anti-dew structure are connected in series on the normal-temperature circulation loop.

Therefore, the waste heat of the thermoacoustic refrigerator is fully utilized through the composite radiating side plate, the evaporating disc radiating structure and the anti-dew structure, and the overall radiating efficiency of the thermoacoustic refrigerator is improved.

Further, evaporation to dryness dish heat radiation structure including have hold the chamber the disk body and with the layer baffle that the disk body cooperatees and connects, form sealed heat dissipation chamber between disk body and the layer baffle, be provided with on one of them of disk body and layer baffle switch on in the second inlet and the second liquid outlet at heat dissipation chamber both ends.

Therefore, the heat dissipation cavity is used for conducting flow guiding, so that the heat of the secondary refrigerant can be quickly and uniformly distributed to the whole tray body, and the evaporation efficiency and the heat dissipation efficiency are improved.

In summary, the composite heat dissipation side plate provided by the utility model has the following technical effects:

the composite radiating side plate can be arranged on the side wall of the thermoacoustic refrigerator to replace the existing radiating coil and the metal outer side plate of the refrigerator body, so that the radiating efficiency is high, and the overall cost of the thermoacoustic refrigerator can be effectively reduced; in this compound heat dissipation curb plate, utilize the recess runner with the water conservancy diversion coolant, the heat that the coolant carried can discharge the environment through inner panel and outer panel (especially outer panel), compare in traditional heat dissipation coil pipe, the heat transfer effect of this compound heat dissipation curb plate is better, and the structure that outer panel and inner panel overlapped and close can make things convenient for the design and the processing of recess runner, reduces the processing degree of difficulty and the production of part to become.

Drawings

Fig. 1 is an exploded view of a composite heat dissipation side plate according to embodiment 1 of the present invention;

fig. 2 is a schematic structural view of an inner panel of embodiment 1 of the utility model;

fig. 3 is a schematic structural view of the inner panel according to embodiment 1 of the present invention, in which the first air-guide ribs are in another pattern;

FIG. 4 is a schematic structural view of a thermoacoustic refrigerator according to embodiment 2 of the present invention;

FIG. 5 is a perspective view of the thermoacoustic refrigerator of embodiment 2 of the present invention with the refrigerator body removed;

fig. 6 is a schematic cross-sectional view of a heat dissipation structure of a evaporating pan in embodiment 2 of the present invention;

fig. 7 is an exploded view of a heat dissipating structure of a evaporating pan in embodiment 2 of the present invention.

Wherein the reference numerals have the following meanings:

1. a refrigerator body; 2. a thermoacoustic refrigerator; 21. a hot end; 22. a cold end; 3. a low temperature circulation loop; 31. a heat exchanger; 32. a cryopump; 4. a normal temperature circulation loop; 41. a normal temperature pump; 5. compounding a heat dissipation side plate; 51. an outer panel; 52. an inner plate; 521. a groove flow channel; 522. a first liquid inlet; 523. a first liquid outlet; 5211. a first region; 5212. a second region; 5213. a third region; 524. a first flow guiding rib; 6. evaporating the heat-dissipating structure of the tray; 61. a tray body; 611. an accommodating chamber; 62. a layer separator; 621. a second flow guiding rib; 63. a heat dissipation cavity; 64. a second liquid inlet; 65. a second liquid outlet; 7. and (4) an anti-dew structure.

Detailed Description

For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Example 1

Referring to fig. 1 and 2, the utility model discloses a composite heat dissipation side plate 5, wherein the composite heat dissipation side plate 5 can be used for being mounted on the side wall of a thermoacoustic refrigeration refrigerator to replace the existing heat dissipation coil pipe, and a metal outer side plate is not required to be arranged on the side wall of the thermoacoustic refrigeration refrigerator again.

Specifically, the composite heat dissipation side plate 5 includes an outer plate 51 and an inner plate 52, the inner plate 52 has a groove channel 521, the outer plate 51 and the inner plate 52 are combined to cover the groove channel 521, and the inner plate 52 is provided with a first liquid inlet 522 and a first liquid outlet 523, which are used for conducting the groove channel 521.

Different from a high-pressure loop of a vapor compression refrigeration system, a normal-temperature circulation loop of the thermoacoustic refrigeration refrigerator belongs to a normal-pressure loop, the requirements on the overall strength and the sealing performance of the composite radiating side plate 5 are not high, and based on the requirements, the performance requirements on the strength and the sealing performance can be met by simply combining the outer side plate 51 and the inner plate 52.

Through the scheme, the groove flow channel 521 is utilized to guide the secondary refrigerant, the heat carried by the secondary refrigerant can be discharged to the environment through the inner plate 52 and the outer plate 51 (particularly the outer plate 51), compared with the traditional heat dissipation coil pipe, the heat exchange effect of the composite heat dissipation side plate 5 is better, the structure formed by covering the outer plate 51 and the inner plate 52 can facilitate the design and processing of the groove flow channel 521, and the processing difficulty and the production cost of parts are reduced.

In particular, the inner plate 52 is made of plastic plate by vacuum forming, so that the production of the inner plate 52 is facilitated, and the cost is low.

In particular, the outer panel 51 is made of a metal plate material to enhance the heat dissipation efficiency of the outer panel 51, and the inner panel 52 and the outer panel 51 are fixed by sonic welding or gluing, so that the requirement for sealing performance can be met at a low cost.

Referring to fig. 2, the recessed channel 521 is substantially U-shaped or inverted U-shaped, and specifically includes a first region 5211, a second region 5212 and a third region 5213, wherein the first region 5211 and the second region 5212 are arranged side by side, the third region 5213 communicates with one end of the first region 5211 and one end of the second region 5212, the first liquid inlet 522 communicates with one end of the first region 5211 far from the third region 5213, and the first liquid outlet 523 communicates with one end of the second region 5212 far from the third region 5213.

When in use, the secondary refrigerant flows through the following components in sequence: the first liquid inlet 522, the first region 5211, the third region 5213 and the second region 5212 then flow out of the first liquid outlet 523. Therefore, the three areas are arranged, and the positions of the first liquid inlet 522 and the first liquid outlet 523 are combined to prolong the flow guide path of the groove flow channel 521, so that the heat of the secondary refrigerant can be uniformly dissipated to the inner plate 52 and the outer plate 51 relatively, and the heat exchange efficiency of the composite heat dissipation side plate 5 is improved.

Preferably, the first region 5211, the second region 5212 and the third region 5213 are all formed by recessing the inner plate 52 on the side thereof adjacent to the outer plate 51, so as to ensure that the bonding area between the inner plate 52 and the outer plate 51 is kept at a larger value, thereby enhancing the sealing effect.

Referring to fig. 2, in the embodiment, first flow guiding ribs 524 are disposed in the first region 5211 and/or the second region 5212, and the heat exchange area of the groove flow channel 521 can be increased by the first flow guiding ribs 524.

The first air guiding ribs 524 are formed by protruding the bottom surfaces of the first areas 5211 and/or the second areas 5212 toward the outer panel 51, so that the inner panel 52 has certain strength, the material consumption of the inner panel 52 is reduced, and the cost is saved; and the surface of the first flow guiding ribs 524 abuts against the side surface of the outer plate 51, so that the outer plate 51 and the inner plate 52 are not deformed when being combined, and on the other hand, the coolant among different first flow guiding ribs 524 can be limited to circulate, thereby avoiding excessive concentration of the coolant and further improving the heat exchange efficiency of the composite heat dissipation side plate 5.

Preferably, the first flow guiding ribs 524 are disposed in a plurality and are disposed side by side, and meanwhile, the first flow guiding ribs 524 are substantially in a long strip shape and extend along the flow guiding direction of the groove flow channel 521, so that the distribution of the secondary refrigerant is effectively controlled through the first flow guiding ribs 524, and the heat exchange efficiency of the composite heat dissipation side plate 5 is further improved.

Referring to fig. 3, in other preferred embodiments, the first flow guiding ribs 524 may also be wavy and extend along the flow guiding direction of the trough channels 521 to further extend the flow path of the coolant on the trough channels 521.

Example 2

Referring to fig. 4 and 5, the present embodiment provides a thermoacoustic refrigerator employing a composite heat dissipation side plate 5 as described in embodiment 1.

In this embodiment, the thermoacoustic refrigeration refrigerator includes a refrigerator body 1, a thermoacoustic refrigerator 2, a low-temperature circulation loop 3, and a normal-temperature circulation loop 4, where the thermoacoustic refrigerator 2 has a hot end 21 and a cold end 22, the low-temperature circulation loop 3 can transport the cold energy of the cold end 22 into the refrigerator body 1, and the normal-temperature circulation loop 4 can radiate the waste heat of the hot end 21 outwards.

Specifically, at least one side of the refrigerator body 1 is provided with the composite heat dissipation side plate 5 as described in embodiment 1, and the composite heat dissipation side plate 5 is connected in series to the normal temperature circulation loop 4, so that the composite heat dissipation side plate 5 is used to replace the existing heat dissipation coil and the metal outer side plate of the refrigerator body 1.

The low-temperature circulation loop 3 is connected in series with a heat exchanger 31, the heat exchanger 31 is positioned in the refrigerator body 1, and specifically, the heat exchanger 31 is positioned at a position corresponding to the storage chamber of the refrigerator body 1. In use, the low temperature circulation loop 3 is arranged to deliver cold from the cold end 22 to the heat exchanger 31 so that the heat exchanger 31 can exchange heat with the environment for refrigeration applications.

The low-temperature circulation circuit 3 and the normal-temperature circulation circuit 4 are respectively connected to a refrigerant circuit, a heat exchanger, and the like.

It will be appreciated that a cryogenic pump 32 is connected in series with the cryogenic cycle loop 3 to pump the cryogenic coolant during refrigeration; an ambient-temperature pump 41 is connected in series to the ambient-temperature circulation circuit 4 so as to pump the ambient-temperature coolant during the refrigeration.

By the scheme, the refrigerating medium of the normal-temperature circulation loop 4 flows through the groove flow passage 4223, and the waste heat of the thermoacoustic refrigerator 2 is discharged to the environment by using the composite heat dissipation side plate 5, so that the heat dissipation efficiency is high, the production cost is low, the assembly is convenient, and the overall cost of the thermoacoustic refrigerator can be effectively reduced.

Referring to fig. 4 and 5, in the present embodiment, the thermoacoustic refrigeration refrigerator further includes a evaporating pan heat dissipation structure 6 and an anti-dew structure 7, where the evaporating pan heat dissipation structure 6 and the anti-dew structure 7 are both connected in series to the normal temperature circulation loop 4. The evaporating plate heat dissipation structure 6 is located at the bottom of the refrigerator body 1 and is used for receiving defrosting water, specifically, the bottom of the refrigerator body 1 is provided with an installation cavity (not shown in the figure), the evaporating plate heat dissipation structure 6 is arranged in the installation cavity, and the top of the installation cavity is provided with a defrosting water flow channel (not shown in the figure) which is used for receiving defrosting water dropping from the heat exchanger 31 and collecting and guiding the defrosting water to the evaporating plate heat dissipation structure 6; the dew prevention structure 43 is positioned at the door frame of the refrigerator body 1, and plays a role in preventing dewing and frost condensation at the door gap.

Therefore, the waste heat of the thermoacoustic refrigerator 2 can be fully utilized by evaporating the tray heat dissipation structure 6 and the dew prevention structure 7, and the heat dissipation efficiency of the normal temperature circulation circuit 4 can be enhanced.

In this embodiment, preferably, two composite heat dissipation side plates 5 are disposed on two opposite side walls of the refrigerator body 1, wherein the serial connection sequence of the components is as follows: a composite radiating side plate 5, an anti-dew structure 7, another composite radiating side plate 5 and a drying plate radiating structure 6 are connected in series on the normal temperature circulation loop 4 in sequence. So as to form a pipeline structure which is connected in series in sequence, and the heat dissipation effect and the overall layout of the pipeline are convenient to optimize.

In this embodiment, the anti-dew structure 43 may be an anti-dew tube extending along the edge of the door frame of the refrigerator body 1, and two ends of the anti-dew tube are respectively communicated with the different composite heat dissipation side plates 5; alternatively, the anti-exposure structure 43 may be a plate-shaped structure having a flow channel inside the similar composite heat dissipation side plate 5, and the inlet and outlet ports of the plate-shaped structure are respectively communicated with different composite heat dissipation side plates 5. The specific structure of the dew condensation preventing structure 43 is not limited in this embodiment, and the function of preventing dew condensation and frost condensation at the door gap can be satisfied.

Referring to fig. 6 and 7, in the present embodiment, the evaporating dish heat dissipation structure 6 includes a dish body 61 having a containing cavity 611 and a layer partition plate 62 cooperatively connected with the dish body 61, wherein the containing cavity 611 can be used for receiving defrosting water, a sealed heat dissipation cavity 63 is formed between the dish body 61 and the layer partition plate 62, and one of the dish body 61 and the layer partition plate 62 is provided with a second liquid inlet 64 and a second liquid outlet 65 which are communicated with two ends of the heat dissipation cavity 63.

Similarly, different from the high-pressure loop of the vapor compression refrigeration system, the normal-temperature circulation loop 4 of the thermoacoustic refrigeration refrigerator belongs to a normal-pressure loop, and the requirements on the overall strength and the tightness of the evaporating disc heat dissipation structure 6 are not high, so that the simple combination of the disc body 61 and the layer partition plate 62 can meet the performance requirements on the strength and the tightness.

In the normal use process of the thermoacoustic refrigerator, the secondary refrigerant enters the heat dissipation cavity 63 through the second liquid inlet 64 and then flows out of the second liquid outlet 65, so that the heat dissipation cavity 63 is utilized for flow guiding, the heat of the secondary refrigerant can be quickly and uniformly distributed to the whole tray body 61, and the evaporation efficiency and the heat dissipation efficiency are improved.

In this embodiment, the layer partition plate 62 is disposed in the accommodating cavity 611 of the tray body 61 and is attached and fixed to the bottom portion of the accommodating cavity 611, the heat dissipation cavity 63 is formed between a lower surface of a portion of the layer partition plate 62 and the bottom portion of the accommodating cavity 611, and the second liquid inlet 64 and the second liquid outlet 65 are respectively disposed at two end portions of the upper surface of the layer partition plate 62 in a protruding manner; specifically, the middle of the bottom surface of the layer partition 62 is recessed upwards to form a cavity (not shown in the figure), so that the cavity and the bottom surface of the accommodating cavity 611 form a gap, and the space formed by the gap is the heat dissipation cavity 63.

In particular, the layer separator 62 is made of a metallic material. In this case, the layer separator 62 can be directly contacted with the defrosting water, and thus, the metal layer separator 62 can dissipate heat better to evaporate the defrosting water.

Preferably, the layer partition plate 62 may further be provided with a second flow guiding rib 621 located at the heat dissipation cavity 63, and the heat exchange area of the layer partition plate 62 can be increased by the flow guiding rib 4226. Particularly, the second flow guiding ribs 621 are arranged in a plurality of rows and are arranged side by side, and meanwhile, the second flow guiding ribs 621 are substantially in a long strip shape and extend along the flow guiding direction of the heat dissipation cavity 63, so that the distribution of the secondary refrigerant is effectively controlled through the second flow guiding ribs 621, and the heat exchange efficiency of the layer partition plate 62 is further improved.

The technical means disclosed in the utility model scheme are not limited to the technical means disclosed in the above embodiments, but also include the technical scheme formed by any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and such improvements and modifications are also considered to be within the scope of the present invention.

Claims

1. The utility model provides a compound heat dissipation curb plate for install on the lateral wall of thermoacoustic refrigeration refrigerator, its characterized in that includes:

an outer panel;

2. The composite heat dissipation side plate of claim 1, wherein the groove channel comprises a first region, a second region and a third region, wherein the first region and the second region are arranged side by side, the third region connects one end of the first region and one end of the second region, the first liquid inlet connects one end of the first region far away from the third region, and the first liquid outlet connects one end of the second region far away from the third region.

3. The composite heat sink side panel according to claim 2, wherein the first, second and third regions are each formed by an inward recess in a face of the inner panel adjacent to the outer panel.

4. The composite heat dissipation side plate according to claim 3, wherein a plurality of first flow guiding ribs are arranged in the first region and/or the second region side by side, and the first flow guiding ribs extend along a flow guiding direction of the groove flow channel.

5. The composite heat dissipation side plate according to claim 4, wherein the first flow guiding rib is formed by protruding a bottom surface of the first region and/or the second region toward the outer side plate, and a surface of the first flow guiding rib abuts against a side surface of the outer side plate.

6. The composite heat dissipation side panel of any one of claims 1 to 5, wherein the inner panel is formed by plastic sheet material through plastic suction molding.

7. The composite heat dissipation side plate of claim 6, wherein the outer side plate is made of a metal plate, and the inner plate and the outer side plate are fixed by sonic welding or gluing.

8. A thermoacoustic refrigeration refrigerator, comprising:

a refrigerator cabinet provided with a composite heat-dissipating side panel as claimed in any one of claims 1 to 7 on at least one side thereof;

a thermoacoustic refrigerator having a hot end and a cold end;

9. The thermoacoustic refrigeration refrigerator according to claim 8, further comprising a evaporating pan heat dissipation structure and an anti-dew structure located at a door frame of the refrigerator cabinet, wherein the evaporating pan heat dissipation structure and the anti-dew structure are both connected in series on the normal temperature circulation loop.

10. The thermoacoustic refrigerator according to claim 9, wherein the evaporating pan heat dissipation structure comprises a pan body having a receiving cavity and a layer partition plate coupled to the pan body, a sealed heat dissipation cavity is formed between the pan body and the layer partition plate, and a second liquid inlet and a second liquid outlet are disposed on one of the pan body and the layer partition plate and are communicated with two ends of the heat dissipation cavity.