Heat plate with jet cooling and anti-gravity function without external power

Abstract

The application discloses a heat equalizing plate with jet heat dissipation and anti-gravity functions without external power, which comprises a heat equalizing plate body, a pressure chamber, heat dissipation fins and a jet pipe. The heat equalizing plate body is internally provided with a cavity, and a pressure chamber is separated at the bottom of the cavity. A plurality of connecting channels are arranged on the side wall of the pressure chamber and are communicated with the cavity. A high-position heat dissipation area is arranged above the pressure chamber, and the high-position heat dissipation area is provided with heat dissipation fins. The jet pipe is arranged in the cavity. The jet pipe is inserted into the pressure chamber, the top end of the jet pipe is located at the bottom of the high-position heat dissipation area, and the jet port of the jet pipe is aligned with the heat dissipation fins. After the working liquid in the pressure chamber absorbs enough heat, the working liquid can form a gas-liquid plug column flow and jet out, and the jet can cool the heat dissipation fins. The heat equalizing plate has the functions of anti-gravity jet heat dissipation and two heat absorption areas without external power, and has good heat dissipation effect.

Description

Technical Field

[0001] This invention relates to the technical field of heat dissipation for electronic devices, and in particular to the technical field of heat sinks. Background Technology

[0002] As the heat output of chips increases, their heat dissipation becomes increasingly critical. Jetting technology, due to its ability to rapidly break up the vapor layer on the heat exchange surface, ensuring constant contact between the coolant and the surface, boasts a high heat transfer coefficient. However, maintaining continuous jetting requires significant power. Furthermore, the jetting direction is perpendicular to the heat dissipation surface, causing some of the sprayed liquid to reflect back and collide with the sprayed liquid, affecting the continuous jetting cooling effect. Currently, vapor chambers are limited by the wick's inability to withstand gravity. When devices on the vapor chamber are positioned high, the wick cannot provide sufficient working fluid, leading to deteriorated heat dissipation and temperature overheating.

[0003] Existing patent CN115628632A discloses a gravity-resistant, low-expansion-rate vapor chamber and its preparation method, comprising: an upper shell with a boss and multiple first support pillars on its inner side, and a groove for accommodating a heat source formed directly behind the boss; a lower shell with multiple second support pillars corresponding to the first support pillars distributed on its inner side, and its outer side connected to an external cooling fixture; a liquid-absorbing core, which is a sheet-like structure with a first through hole for the first support pillars to pass through, and is tightly fitted to the inner side of the upper shell; a powder ring, which is nested on the second support pillars of the lower shell, with its upper end connected to the first support pillar, and transports the working fluid condensed inside the lower shell to the liquid-absorbing core and then back to the boss; and a working fluid, which is a flowing phase-change liquid, which transfers heat from the boss to the entire vapor chamber. It achieves the upward flow of the liquid through a gradient mesh and powder rings, but the flow rate is slow, resulting in low heat dissipation efficiency of the vapor chamber.

[0004] Existing patent CN206177106U discloses a heat spreader with continuous jet cooling function within its cavity. The heat spreader consists of an upper cover plate, a lower cover plate, and a middle cover plate. The upper cover plate has flow channels, the middle cover plate has flow channels and cooling nozzles, and the lower cover plate has flow channels and a jet cooling chamber. When all the cover plates are welded together, one end of the flow channel on the cover plate is connected to the cooling nozzle, which in turn is connected to the jet cooling chamber. The other end of the flow channel is also connected to the jet cooling chamber, forming a loop. The jet cooling chamber is adjacent to the heat source area, and the medium is continuously sprayed onto the heat source area within the flow channels, ensuring that the medium is always vaporized on the surface of this area, preventing the temperature of the heat source area from becoming too high. Although it can continuously spray, improving the heat dissipation speed, it can only absorb heat from one area, resulting in poor heat dissipation effect. Summary of the Invention

[0005] The purpose of this invention is to solve the problems in the prior art and to propose a heat spreader with jet heat dissipation and anti-gravity function without external power. The heat spreader can have the function of anti-gravity jet heat dissipation without external power and has two heat absorption areas, resulting in good heat dissipation effect.

[0006] To achieve the above objectives, this invention proposes a heat spreader with jet cooling and anti-gravity functions that requires no external power. The heat spreader includes a main body, a pressure chamber, heat dissipation fins, and a jet pipe. The main body has an internal cavity, with a pressure chamber separated at the bottom. The sidewall of the pressure chamber has several connecting channels communicating with the cavity. A high-level heat dissipation area is located above the pressure chamber, and heat dissipation fins are provided in the high-level heat dissipation area. A jet pipe is installed inside the cavity, inserted into the pressure chamber, with its top end located at the bottom of the high-level heat dissipation area. The nozzle of the jet pipe is aligned with the heat dissipation fins. A working liquid is provided inside the cavity, submerging the pressure chamber, with the liquid level below the nozzle of the jet pipe.

[0007] Preferably, the connection channel is provided with a porous filler that allows working fluid to permeate.

[0008] Preferably, the bottom of the injection pipe is lower than the connecting channel.

[0009] Preferably, the heat dissipation fins extend from inside the cavity through the outer wall of the heat spreader body to the outside of the heat spreader body.

[0010] Preferably, the heat dissipation fins are arranged vertically.

[0011] Preferably, the connection channel is located in the lower middle part of the pressure chamber.

[0012] Preferably, the injection pipe is vertically arranged and inserted into the pressure chamber from the top wall of the pressure chamber, and the injection pipe is fixed to the top wall of the pressure chamber.

[0013] Preferably, the high-level heat dissipation area is located in the upper middle part of the heat spreader body.

[0014] Preferably, the pressure chamber is located in the middle of the bottom wall of the heat spreader body, and all the outer side walls of the pressure chamber are in contact with the working fluid.

[0015] Preferably, the top wall and side wall of the pressure chamber together form a downward-opening cover, and the bottom end of the cover is fixed to the inner bottom wall of the heat spreader body.

[0016] The beneficial effects of the present invention are as follows: The present invention inserts a spray pipe into the pressure chamber, with the top of the spray pipe located at the bottom of the high-level heat dissipation area and the spray nozzle of the spray pipe aligned with the heat dissipation fins. This allows the working liquid in the pressure chamber to absorb sufficient heat and form a gas-liquid plug jet that is then sprayed out. The sprayed material can cool the heat dissipation fins, enabling the heat spreader to have the function of anti-gravity spray heat dissipation without external power. It also has two heat absorption areas, resulting in good heat dissipation effect.

[0017] The features and advantages of the present invention will be described in detail through embodiments and in conjunction with the accompanying drawings. Attached Figure Description

[0018] Figure 1 This is a front view of the heat spreader plate of the present invention, which has jet heat dissipation and anti-gravity functions without external power.

[0019] In the figure: 1-heat spreader body, 2-pressure chamber, 3-jet pipe, 4-high heat dissipation area, 5-working fluid, 10-cavity, 20-connection channel, 21-porous filler plug, 40-heat dissipation fins. Detailed Implementation

[0020] Example 1: See Figure 1 The present invention provides a heat dissipation plate with jet cooling and anti-gravity functions without external power, comprising a heat dissipation plate body 1, a pressure chamber 2, heat dissipation fins 40 and a jet pipe 3.

[0021] The heat spreader body 1 has a cavity 10 inside, and a pressure chamber 2 is separated from the bottom of the cavity 10. The bottom wall of the pressure chamber 2 is part of the bottom wall of the heat spreader body 1, and several connecting channels 20 connected to the cavity 10 are provided on the side wall of the pressure chamber 2.

[0022] The pressure chamber 2 is provided with a high-level heat dissipation area 4, and the high-level heat dissipation area 4 is provided with heat dissipation fins 40.

[0023] The high-level heat dissipation zone 4 is located in the upper middle part of the heat spreader body 1.

[0024] The cavity 10 is provided with a spray pipe 3, which is inserted into the pressure chamber 2. The top of the spray pipe 3 is located at the bottom of the high heat dissipation area 4, and the spray nozzle of the spray pipe 3 is aligned with the heat dissipation fins 40.

[0025] The cavity 10 contains a working liquid 5, which submerges the pressure chamber 2. The liquid level of the working liquid 5 is lower than the nozzle of the spray pipe 3, and the working liquid 5 forms a liquid level zone at the bottom of the cavity 10.

[0026] The heat dissipation fins 40 extend from inside the cavity 10 through the outer wall of the heat spreader body 1 to the outside of the heat spreader body 1.

[0027] Example 2: While ensuring that the working fluid 5 can be replenished into the pressure chamber 2 in a timely manner, the steam in the pressure chamber 2 is prevented from overflowing from the connecting channel 20, thus ensuring the pressure in the pressure chamber 2. The connecting channel 20 is provided with a porous filling plug 21 that allows the working fluid 5 to permeate. The porous filling plug 21 is made of porous material.

[0028] Example 3: To ensure the spraying effect, the connecting channel 20 is located in the lower middle part of the pressure chamber 2.

[0029] The bottom of the injection pipe 3 is lower than the connecting channel 20.

[0030] The injection pipe 3 is vertically arranged and is inserted into the pressure chamber 2 from the top wall of the pressure chamber 2. The injection pipe 3 is fixed to the top wall of the pressure chamber 2.

[0031] Example 4: In order to ensure that the heat dissipation fins 40 can come into contact with the sprayed liquid as much as possible, the heat dissipation fins 40 are arranged vertically.

[0032] Example 5: In order to improve the heat absorption capacity of the pressure chamber 2, the pressure chamber 2 is located in the middle of the bottom wall of the heat spreader body 1, and all the external side walls of the pressure chamber 2 are in contact with the working liquid 5.

[0033] The top and side walls of the pressure chamber 2 together form a downward-opening cover, and the bottom end of the cover is fixed to the inner bottom wall of the heat spreader body 1.

[0034] The working process of this invention: This invention's heat spreader, which has jet cooling and anti-gravity functions without external power, operates by having the bottom wall of the pressure chamber 2 in direct contact with or connected to the electrical components requiring heat dissipation via thermally conductive adhesive. The working liquid 5 within the pressure chamber 2 is heated and transforms from a liquid to a vapor state, expanding in volume several tens of times. The vapor and the working liquid 5 within the pressure chamber 4 form a vapor-liquid plug flow within the jet pipe 3 and move towards the higher heat dissipation zone 4. One jet is completed when the vapor-liquid plug flow is ejected from the end of the jet pipe 3. The high-temperature vapor from the vapor-liquid plug flow continues to diffuse within the cavity 10 and eventually condenses into a liquid state, flowing back to the liquid level zone.

[0035] When there are electrical components that need heat dissipation in the high-level heat dissipation zone 4, the liquid in the vapor-liquid plug flow is sprayed onto the heat dissipation fins 40 of the high-level heat dissipation zone 4. The liquid absorbs the heat on the heat dissipation fins 40 of the high-level heat dissipation zone 4 and turns into steam, thereby achieving heat dissipation in the high-level heat dissipation zone 4. The steam diffuses in the cavity 10 and eventually condenses into liquid and flows back to the liquid level zone 6.

[0036] To ensure timely replenishment of the working fluid 5 within the pressure chamber 2, a connecting channel 20 with a porous plug 21 is provided on the side wall of the pressure chamber 2. Since the porous plug 21 is made of porous material, it facilitates timely replenishment of the working fluid 5 from the liquid level zone to the pressure chamber 2. Furthermore, the high osmotic pressure of the porous plug 21 prevents vapor from escaping from the pressure chamber 2, thus maintaining the pressure within the pressure chamber 2.

[0037] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the scope of protection of the present invention.

Claims

1. A heat spreader with jet cooling and anti-gravity functions without external power, characterized in that: The device includes a heat spreader body (1), a pressure chamber (2), heat dissipation fins (40), and a spray pipe (3). The heat spreader body (1) has a cavity (10) inside, and a pressure chamber (2) is separated at the bottom of the cavity (10). The side wall of the pressure chamber (2) has several connecting channels (20) that communicate with the cavity (10). A high-level heat dissipation area (4) is provided above the pressure chamber (2), and heat dissipation fins (40) are provided in the high-level heat dissipation area (4). A spray pipe (3) is provided in the cavity (10). The spray pipe (3) is inserted into the pressure chamber (2). The top of the spray pipe (3) is located at the bottom of the high-level heat dissipation area (4), and the spray nozzle of the spray pipe (3) is aligned with the heat dissipation fins (40). A working liquid (5) is provided in the cavity (10). The working liquid (5) is above the pressure chamber (2), and the liquid level of the working liquid (5) is lower than the spray nozzle of the spray pipe (3).

2. The heat spreader with jet cooling and anti-gravity functions without external power as described in claim 1, characterized in that: The connection channel (20) is provided with a porous filler (21) that allows the working fluid (5) to permeate.

3. The heat spreader with jet cooling and anti-gravity functions without external power as described in claim 1, characterized in that: The bottom of the injection pipe (3) is lower than the connecting channel (20).

4. The heat spreader with jet cooling and anti-gravity functions without external power as described in claim 1, characterized in that: The heat dissipation fins (40) extend from inside the cavity (10) through the outer wall of the heat spreader body (1) to the outside of the heat spreader body (1).

5. The heat spreader with jet cooling and anti-gravity functions without external power as described in claim 1, characterized in that: The heat dissipation fins (40) are arranged vertically.

6. The heat spreader with jet cooling and anti-gravity functions without external power as described in claim 1, characterized in that: The connecting channel (20) is located in the lower middle part of the pressure chamber (2).

7. The heat spreader with jet cooling and anti-gravity functions without external power as described in claim 1, characterized in that: The injection pipe (3) is set vertically and is inserted into the pressure chamber (2) from the top wall of the pressure chamber (2). The injection pipe (3) is fixed to the top wall of the pressure chamber (2).

8. The heat spreader with jet cooling and anti-gravity functions without external power as described in claim 1, characterized in that: The high-level heat dissipation zone (4) is located in the upper middle part of the heat spreader body (1).

9. The heat spreader with jet cooling and anti-gravity functions without external power as described in claim 1, characterized in that: The pressure chamber (2) is located in the middle of the bottom wall of the heat spreader body (1), and all the outer side walls of the pressure chamber (2) are in contact with the working fluid (5).

10. The heat spreader with jet cooling and anti-gravity functions without external power as described in claim 1, characterized in that: The top and side walls of the pressure chamber (2) together form a downward-opening cover, and the bottom end of the cover is fixed to the inner bottom wall of the heat spreader body (1).

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