CN218959373U

CN218959373U - Radiator

Info

Publication number: CN218959373U
Application number: CN202223527697.7U
Authority: CN
Inventors: 牟永斌; 赵秀红
Original assignee: Suzhou Shengrongyuan Electronic Technology Co ltd
Current assignee: Suzhou Shengrongyuan Electronic Technology Co ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-05-02
Anticipated expiration: 2032-12-28

Abstract

The utility model discloses a radiator, which comprises an evaporator and at least one condensing plate connected to the evaporator, wherein the evaporator comprises a shell, a first capillary tissue and a second capillary tissue, wherein the first capillary tissue and the second capillary tissue are arranged in the shell; and a runner communicated between the first through hole and the second through hole is arranged in the condensing plate. Compared with the existing air-cooled radiator, the utility model greatly increases the effective contact area with the heat source and improves the condensation heat exchange efficiency.

Description

Radiator

Technical Field

The utility model relates to the technical field of heat dissipation, in particular to a radiator.

Background

The air-cooled radiator has the advantages of simplicity, reliability, low cost and the like, and is widely applied to the field of power electronic heat dissipation. However, with the rapid development of industries such as big data, AI, internet of things and the like, the power consumption of the hardware integrated circuit is larger and larger, and the heat productivity and the heat flux density are also larger and larger. The heat dissipation capability of conventional air-cooled heat sinks, such as heat pipe heat sinks and temperature plates, is increasingly difficult to meet. The heat pipe has small heat transfer capability and small effective contact area with the heat source. The effective contact area of the temperature equalizing plate and the heat source is large, but the condensation area is difficult to expand, so that the heat dissipation capacity is limited. The temperature equalizing plate and the heat pipe are combined together for use in the industry, but the process is difficult, and the liquid working medium in the heat pipe flows back by gravity and has opposite flowing direction with the steam working medium, so that a liquid film gathers on the pipe wall of the heat pipe, and the heat exchange efficiency is poor. Accordingly, improvements are needed.

Disclosure of Invention

The present utility model is directed to a heat sink to solve the above-mentioned problems.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

comprising an evaporator and at least one condensing plate connected to the evaporator, wherein,

the evaporator comprises a shell, a first capillary tissue and a second capillary tissue, wherein the first capillary tissue and the second capillary tissue are arranged in the shell, the shell comprises a bottom plate and a cover plate, a cavity is formed in the shell, the first capillary tissue and the second capillary tissue are relatively arranged in the cavity, the first capillary tissue is arranged on the cover plate, the second capillary tissue is arranged on the bottom plate, one end of the cover plate, which is away from the bottom plate, is provided with a plurality of first through holes and second through holes, and the first capillary tissue and the first through holes are staggered;

and a runner communicated between the first through hole and the second through hole is arranged in the condensing plate.

Further, in the radiator, a liquid filling pipe communicated with the cavity is arranged on the outer side of the cover plate.

Further, in the radiator, a supporting capillary tissue is disposed between the first capillary tissue and the second capillary tissue.

Further, in the above heat sink, the supporting capillary tissue and the first capillary tissue or the second capillary tissue are integrally formed, and are abutted against the second capillary tissue or the first capillary tissue.

Further, in the heat sink, the supporting capillary tissue is respectively abutted against the first capillary tissue and the second capillary tissue.

Further, in the above radiator, the condensation plate includes a first shell plate and a second shell plate, and the flow channel is formed between the first shell plate and the second shell plate, and two ends of the flow channel penetrate through an end face of the condensation plate, which is close to one side of the evaporator.

Further, in the radiator, the runner is formed on the inner surface of the first shell plate and/or the second shell plate through an etching process or a stamping process or a die casting process.

Further, in the radiator, a heat radiation fin group is disposed on an outer surface of the condensation plate.

Further, in the radiator, a third capillary tissue is disposed in the flow channel.

Further, in the radiator, the evaporator is a temperature equalizing plate.

Compared with the prior art, the utility model has the beneficial effects that:

(1) Compared with a heat pipe radiator, the utility model greatly increases the effective contact area with a heat source and improves the uniformity of the temperature of the heat source.

(2) The condensing plate in the radiator is internally provided with the multi-flow channel structure, and working mediums in all fluid channels work under the same saturation pressure, so that the condensing plate is fully and efficiently utilized; compared with the traditional heat pipe radiator and the temperature equalizing plate, the condensing heat exchange efficiency of the radiator is higher.

(3) The radiator has the advantages of simple process, convenient implementation and low cost.

Drawings

Fig. 1 is a schematic structural diagram of an evaporator according to an embodiment of the utility model.

Fig. 2 is a schematic structural view of an evaporator according to another embodiment of the present utility model.

Fig. 3 is a schematic structural view of an evaporator according to another embodiment of the utility model.

Fig. 4 (a) and fig. 4 (b) are schematic structural views of a condensation plate according to an embodiment of the present utility model.

Fig. 5 (a) and 5 (b) are schematic structural views of a condensation plate according to another embodiment of the present utility model.

Fig. 6 (a) and 6 (b) are schematic structural views of a condensation plate according to another embodiment of the present utility model.

Fig. 7 is a schematic structural diagram of a heat sink according to an embodiment of the utility model.

Fig. 8 is a schematic view of section E-E of fig. 7.

Fig. 9 is a schematic cross-sectional view of the F-F of fig. 7.

Fig. 10 is a schematic structural diagram of a heat sink according to another embodiment of the utility model.

Fig. 11 is a schematic structural diagram of a heat sink according to another embodiment of the utility model.

Fig. 12 is a schematic longitudinal section of fig. 11.

Fig. 13 is a schematic cross-sectional view.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1 to 13, a radiator includes an evaporator 1, at least one condensing plate 2 connected to the evaporator 1, wherein,

the evaporator 1 comprises a shell formed by a bottom plate 11 and a cover plate 12, wherein a cavity is formed in the shell, a first capillary tissue 13 and a second capillary tissue 14 which are opposite are arranged in the shell, the first capillary tissue 13 is arranged on the cover plate 12, the second capillary tissue 14 is arranged on the bottom plate 11, one end of the cover plate 12, which is away from the bottom plate 11, is provided with a plurality of first through holes and second through holes (not labeled), the first capillary tissue 13 and the first through holes are staggered, namely, the first capillary tissue is distributed on the corresponding inner surface of the cover plate, and the position for removing the first through holes is avoided;

a flow passage communicated between the first through hole and the second through hole is arranged in the condensation plate 2.

According to the technical scheme, a bottom plate and an upper cover which are made of copper, stainless steel or aluminum are fixed through welding, an airtight cavity is formed in the inner space of the bottom plate and the upper cover, a first capillary tissue and a second capillary tissue are arranged at two ends of the cavity relatively, wherein the first capillary tissue and the second capillary tissue are any one or more of the existing net, foam metal, metal felt, fiber bundles and metal powder sintering porous structures, the first capillary tissue and the second capillary tissue are of the same structure or different structures, a first through hole and a second through hole are formed in a condensation plate, the first capillary tissue covers one end of the second through hole, and working medium flows in a unidirectional circulating mode between the condensation plate and the cavity.

As shown in fig. 7, 8 and 10 to 12, for example, the outer side of the cover plate 12 is provided with a filling pipe 3 communicating with the chamber.

In the technical scheme, the liquid filling pipe is used for filling water or alcohols into the cavity and is used as a heat exchange working medium, and the pipe orifice is sealed after filling.

Illustratively, as shown in fig. 1 to 3, a supporting capillary tissue 15 is provided between the first capillary tissue 13 and the second capillary tissue 14.

In the technical scheme, when the radiator is normally placed, liquid working medium in the cavity gathers at the bottom of the cavity under the action of gravity of the liquid working medium, the liquid working medium is introduced into the second capillary structure through the supporting capillary structure, and the evaporated gas phase working medium is prevented from flowing out from the second through hole.

Illustratively, as shown in fig. 1, the supporting capillary tissue 15 is integrally formed with the first capillary tissue 13 and abuts against the second capillary tissue 14.

In the technical scheme, the first capillary tissue is a whole capillary tissue with equal thickness, and the top surface of the first capillary tissue is provided with a part protruding towards the direction of the second capillary tissue and is used as a supporting capillary tissue so as to be directly connected with the second capillary core.

Illustratively, as shown in fig. 3, the supporting capillary tissue 15 is integrally formed with the second capillary tissue 14 and abuts against the first capillary tissue 13.

In the technical scheme, the first capillary tissue is a capillary tissue with equal thickness, and one end surface of the bottom surface of the second capillary tissue is provided with a part protruding towards the direction of the first fine tissue and is used as a supporting capillary tissue so as to be directly connected with the first capillary core.

Illustratively, as shown in fig. 3, the supporting capillary tissue 15 is abutted against the first capillary tissue 13 and the second capillary tissue 14, respectively.

In the technical scheme, the first capillary tissue is a whole capillary core body with different thicknesses, the capillary support structures are independently arranged and are respectively and directly connected with the first capillary tissue and the second capillary tissue, and the first capillary tissue and/or the second capillary tissue can simultaneously convexly support the capillary tissue and coexist with the independently arranged support capillary tissue.

As shown in fig. 4 (a) to 6 (b), the condensation plate 2 includes a first shell plate 21 and a second shell plate 22, and a flow passage is formed between the first shell plate 21 and the second shell plate 22, and both ends of the flow passage penetrate through an end face of the condensation plate 2 on a side close to the evaporator 1.

In the technical scheme, the first shell plate and the second shell plate are made of copper or aluminum, three sides except the side surface close to the evaporator are welded and sealed, two ends of the flow channel penetrate through the end surface of the condensing plate close to one side of the evaporator and are respectively communicated with the first through hole and the second through hole, circulation of working media is achieved, and heat exchange is completed in the circulation process of the working media.

As shown in fig. 4 (a) to 6 (b), the runner is formed on the inner surface of the first shell plate 21 and/or the second shell plate 22 by an etching process or a punching process or a die casting process, for example.

In the technical scheme, a runner groove is processed on the inner surface of a first shell plate and/or a second shell plate through an etching process, a stamping process or a die casting process, and a finished runner is formed after the first shell plate and the second shell plate are welded, wherein the runner comprises a gas-phase runner 211 communicated with a first through hole and a liquid-phase runner 212 communicated with a second through hole, part of the runners are arc-shaped along the flowing direction of working media so as to be beneficial to reducing the flowing resistance of the working media, a first capillary tissue is not arranged at the communicating port of the gas-phase runner and the first through hole, and a first capillary tissue is arranged at the communicating port of the liquid-phase runner and the liquid-phase runner.

As shown in fig. 7 to 13, the outer surface of the condensation plate 2 is coated with a first fin group 4.

According to the technical scheme, through the arrangement of the first radiating fin group, the effective contact area with air is greatly increased, and the radiating capacity is improved.

Illustratively, the evaporator is a temperature equalization plate.

In the technical scheme, the effective contact area of the temperature equalizing plate and the heat source is large, and the condensing area of the temperature equalizing plate is enlarged through the condensing plate connected with the temperature equalizing plate, so that the heat dissipation capacity is improved.

As shown in fig. 7 to 13, for example, a third capillary tissue 5 is provided in the flow path.

In the technical scheme, the third capillary structure can be formed by one or more of silk screens, foam metal, metal felts, fiber bundles and metal powder sintering porous structures, when the radiator is inclined or inverted for use, liquid working medium is gathered at the bottom of the space position of the radiator due to the action of gravity, particularly in the inverted condition, the liquid working medium is gathered in a runner in a condensing plate, no liquid working medium exists in a first capillary structure in an evaporator, the radiator cannot be started, and the third capillary structure arranged in the runner of the condensing plate can lead the liquid working medium to the second capillary structure through the first capillary structure, so that the second capillary structure is fully soaked to ensure the starting.

In some embodiments, as shown in fig. 7-9, the chamber within the evaporator is evacuated through a charge tube and welded and sealed after filling with a working fluid. The evaporator contacts with the heat source, the working medium in the evaporator is vaporized at the second capillary tissue, and the first capillary tissue is arranged at the communication port of the liquid flow passage and the second through hole of the evaporator, so that the gaseous working medium cannot penetrate through the second through hole and is forced to enter the condensing plate from the communication position of the gas flow passage and the first through hole; the vapor is gradually condensed after being released heat outwards through the radiating fin group in the condensing plate, and condensed liquid flows to the liquid phase flow channel under the action of vapor carrying and pressure difference. Because the working medium is vaporized at the second capillary tissue to form capillary pressure difference, the liquid side of the second capillary tissue has relatively lower pressure than the second through hole end of the condensing plate, and the pressure difference guides the liquid working medium to pass through the third capillary tissue and return to the second capillary tissue through the first capillary tissue; with this circulation, heat is dissipated from the heat source to the environment.

In other embodiments, as shown in fig. 10, the condensation plate may also be disposed on a side of the evaporator, and positions corresponding to the second through hole and the first through hole are also disposed on the side of the evaporator, and the structures and working principles of the rest of the embodiments are not described herein, which are particularly suitable for the situation that the upper space of the heat source is small, and can conduct heat to the side of the heat source for cooling.

In still other embodiments, as shown in fig. 11 to 13, all liquid-phase flow channels of the condensing plate and the second through holes of the evaporator have a first capillary structure, and all gas-phase flow channels are communicated with the first through holes of the evaporator without the first capillary structure; a third capillary tissue is arranged in the liquid-phase flow passage, and the third capillary tissue only occupies part of the cross section of the liquid-phase flow passage; each third capillary tissue is metallurgically combined with the first capillary tissue at the position of the liquid phase runner where the third capillary tissue is positioned and the communication port of the second through hole; the structure and operation of the rest of the embodiments are not described in detail herein.

In conclusion, the radiator has high heat radiation capability and high efficiency, overcomes the inherent defects of the heat pipe and the temperature equalizing plate of the traditional air-cooled radiator, and is simple, low in cost and convenient to use; the radiator provides a more advanced solution to the increasingly severe heat radiation problem of the power electronic products, and has great economic value.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is merely exemplary of the application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the application and are intended to be comprehended within the scope of the application.

Claims

1. A heat sink, characterized by: comprising an evaporator and at least one condensing plate connected to the evaporator, wherein,

2. A radiator according to claim 1, wherein the cover plate is provided with a filling pipe on the outside thereof, which communicates with the chamber.

3. A heat sink according to claim 1, wherein a supporting capillary tissue is arranged between the first and second capillary tissue.

4. A heat sink according to claim 3, wherein the supporting capillary tissue is integrally formed with the first capillary tissue or the second capillary tissue and is held against the opposite second capillary tissue or first capillary tissue.

5. A heat sink according to claim 3, wherein the supporting capillary tissue is held against the first and second capillary tissues, respectively.

6. A radiator according to any one of claims 1 to 5, wherein the condensation plate comprises a first shell plate and a second shell plate, and the flow passage is formed between the first shell plate and the second shell plate, and both ends of the flow passage penetrate through an end face of the condensation plate, which is close to the evaporator side.

7. A radiator according to claim 6, wherein the flow channels are formed in the inner surface of the first shell plate and/or the second shell plate by an etching process or a stamping process or a die casting process.

8. A heat sink according to claim 1, wherein the outer surface of the condensing plate is provided with a set of heat sink fins.

9. A heat sink according to claim 1, wherein a third capillary tissue is provided in the flow channel.

10. A radiator according to claim 1, wherein the evaporator is a temperature equalizing plate.