Phase change cold plate and cooling system thereof

Abstract

The utility model provides a phase change cold plate and a cooling system thereof, and belongs to the technical field of heat transfer. The technical problem that an existing cold plate structure is low in heat exchange efficiency is solved. The phase change cold plate comprises a heat exchange plate, the heat exchange plate comprises a lower plate body and an upper plate body, the lower plate body and the upper plate body are fixedly connected, a heat exchange cavity is formed between the lower plate body and the upper plate body, the heat exchange cavity is communicated with a working medium inlet in the side portion of the heat exchange plate through a heat exchange flow channel, an indwelling cavity is formed in the upper plate body, and the indwelling cavity is communicated with the working medium inlet in the side portion of the heat exchange plate. The remaining cavity is communicated with the heat exchange cavity through a connecting channel, a capillary plate is arranged between the connecting channel and the heat exchange cavity, a steam passing opening is formed in the upper portion of the remaining cavity, and the steam passing opening is communicated with a steam outlet which is formed in the heat exchange plate and can enable the heat exchange plate to be communicated with the outside. The device has the advantages of high heat exchange efficiency, low circulating energy consumption, high equipment reliability and stability and the like.

Description

TECHNICAL FIELD

[0001] The utility model belongs to heat transfer technical field especially is related to a kind of phase change cold plate and cooling system thereof. BACKGROUND

[0002] Phase change cold plate stores and releases heat through the phase change of matter between liquid and gas. When the external temperature rises, the phase change material changes from liquid to gas, absorbing heat; when the external temperature decreases, the phase change material changes from gas to liquid, releasing heat. This process can effectively maintain the stability of system temperature and achieve efficient energy management. In the prior art, the current cooling system generally uses single-phase liquid refrigerant. In some high-power scenarios, the cooling capacity of single-phase cold plate may reach the upper limit, making it difficult to meet higher heat dissipation requirements. For this reason, people have carried out long-term exploration and proposed various solutions.

[0003] For example, a kind of refrigeration plate is disclosed in Chinese patent document [application number: 201410795637.4], including plate body and cover body, the plate body and the cover body are made of hard material, and the cover body covers the back of the plate body;Cooling water channel is provided in the plate body, the cooling water channel is square spiral or circular arc spiral, water inlet is provided on the front surface of the plate body, and water outlet is provided on the side surface of the plate body, one end of the cooling water channel is connected with the water inlet, and the other end of the cooling water channel is connected with the water outlet. The refrigeration plate provided by the present application increases the path of the cooling water channel, and improves the cooling effect of the cooling plate.

[0004] The above scheme only simply prolongs the cooling water channel, and the improvement degree of heat exchange efficiency is small. SUMMARY

[0005] The utility model aims at above -mentioned problem, provides a kind of phase change cold plate;With higher heat exchange efficiency.

[0006] Another object of the utility model is to provide a kind of phase change cold plate cooling system.

[0007] To achieve the above object, the utility model adopts the following technical scheme: the present phase change cold plate, including heat exchange plate, the heat exchange plate includes lower plate body and upper plate body, the lower plate body and upper plate body are fixedly connected, and heat exchange cavity is provided between the lower plate body and the upper plate body, the heat exchange cavity is communicated with the working medium inlet of the side of the heat exchange plate by heat exchange flow channel, the storage cavity is provided in the upper plate body, the storage cavity is communicated with the heat exchange cavity by connecting channel, and the capillary plate is provided between the connecting channel and the heat exchange cavity, the upper portion of the storage cavity is provided with steam passage, and the steam passage is communicated with the steam outlet provided on the heat exchange plate and can be communicated with the outside.

[0008] The heat exchange cavity and the storage cavity are separated by the capillary plate, so that sufficient working medium can be ensured to evaporate in the heat exchange plate, and excessive working medium can be avoided to cause high pressure in the heat exchange plate or the refrigerant to fail to completely evaporate, thereby effectively improving the heat exchange efficiency.

[0009] In the phase change cold plate, the steam outlet is arranged at the top of the upper plate body or the upper end side of the upper plate body. The steam outlet is arranged at the top or the upper end side, so that the steam generated in the heat exchange process can be orderly discharged through the steam outlet, avoiding the accumulation and backflow of the steam in the heat exchange cavity, ensuring that the steam can be smoothly discharged, providing conditions for continuous heat exchange, and improving the heat transfer efficiency.

[0010] In the phase change cold plate, the maximum inner diameter of the storage cavity is greater than the diameter of the connecting channel, and the steam outlet is arranged at one side of the connecting channel when the steam outlet is arranged at the top of the upper plate body. The maximum inner diameter of the storage cavity is greater than the diameter of the connecting channel, which allows the steam to have more space for buffering and accumulation in the storage cavity, and can prolong the residence time of the steam in the storage cavity to a certain extent. This not only helps to reduce the resistance and pressure loss of the steam in the flow process, improves the smoothness and efficiency of the steam flow, but also enables the heat exchange between the steam and the wall of the storage cavity to be more sufficient.

[0011] In the phase change cold plate, the heat exchange cavity and the heat exchange flow channel are arranged at the top of the lower plate body, and the working medium inlet is arranged at the side of the lower plate body. Since the heat exchange cavity and the heat exchange flow channel are located at the top of the lower plate body, this layout facilitates the transfer of heat from the heat source to the heat exchange cavity and the heat exchange flow channel, and thus the heat can be transferred to the working medium more quickly, thereby improving the heat exchange efficiency.

[0012] In the phase change cold plate, a plurality of heat exchange protrusions arranged in a rectangular array are arranged in the heat exchange cavity, and the heat exchange protrusions are integrated with the lower plate body. The design of the heat exchange protrusions significantly increases the heat exchange area. Since the contact area of the protrusions with the working medium is increased, the working medium can be more fully heat exchanged under the same volume or flow rate, thereby improving the overall heat exchange efficiency.

[0013] In the phase change cold plate, the capillary plate is fixed in the connecting channel or at the top of the heat exchange cavity. The presence of the capillary plate helps the working medium to better undergo phase change in the heat exchange cavity. When the working medium is heated and evaporated, the capillary plate can guide the steam to flow along a specific path, reducing the residence and backflow of the steam. At the same time, in the condensation process, the capillary plate can also promote the capillary action of the liquid working medium, promoting the circulation of the working medium.

[0014] In the phase change cold plate described above, the capillary plate is embedded on the annular step above the heat exchange cavity, and the upper end is abutted on the bottom surface of the upper plate body; or the capillary plate is embedded on the annular step at the lower end of the connecting channel, and the lower end is abutted on the top surface of the upper plate body. By embedding the capillary plate on the annular step and abutting, the precise positioning and stable fixation of the capillary plate are realized, and this design ensures that the capillary plate will not displace due to vibration or temperature change during work, thereby ensuring the stability and reliability of heat exchange.

[0015] The phase change cold plate cooling system comprises the phase change cold plate described above, the working medium inlet of the phase change cold plate is connected with a throttling element, a fluorine pump and a liquid storage tank in sequence, the steam outlet is connected with a vapor-liquid separator, the steam outlet of the vapor-liquid separator is connected with the liquid storage tank through a condenser, and the liquid outlet of the vapor-liquid separator is connected with the liquid storage tank. The system pumps the liquid fluorine compound working medium in the liquid storage tank to the working medium inlet of the phase change cold plate through the fluorine pump, after passing through the throttling element, the liquid working medium absorbs heat and changes phase in the phase change cold plate, thereby taking away a large amount of heat, and then the working medium is separated after passing through the steam outlet in the vapor-liquid separator, the gaseous working medium is condensed in the condenser, and the liquid working medium returns to the liquid storage tank. The system has high overall heat exchange efficiency and low working medium loss, and has low energy consumption.

[0016] In the phase change cold plate cooling system described above, the liquid outlet is connected with the liquid storage tank through a pressure regulating valve, and a pressure relief valve is connected to the liquid storage tank. The introduction of the pressure regulating valve enables the system to accurately control the pressure of the liquid working medium flowing out of the vapor-liquid separator and entering the liquid storage tank, which helps to maintain the stability of the internal pressure of the liquid storage tank, and the stable pressure helps to improve the working efficiency of the fluorine pump. At the same time, it also plays an important safety protection role. When the internal pressure of the liquid storage tank exceeds the set value, the pressure relief valve will automatically open to release the excess pressure, preventing the liquid storage tank from being damaged or dangerous due to overpressure. This design improves the safety and reliability of the system.

[0017] In the phase change cold plate cooling system described above, the throttling element comprises any one of a capillary tube, a throttling short pipe, an expansion valve or an electronic regulating valve. In the case of needing to accurately control the working medium flow, an electronic regulating valve can be selected; while in some cases with strict requirements on cost, a capillary tube or a throttling short pipe with lower cost can be selected. This flexibility enables the system to adapt to different working environments and cooling requirements.

[0018] Compared with the existing technology, the phase change cold plate and its cooling system have the following advantages: 1. It can ensure that there is enough working medium in the phase change cold plate, and optimize the evaporation conditions, thereby improving the heat exchange efficiency. 2. Low energy consumption in circulation, energy saving and environmental protection. 3. It can adjust the pressure, is safe and reliable, and ensures the reliability and stability of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 This is a schematic diagram of the lower plate structure provided by the utility model.

[0020] Figure 2 This is a schematic diagram of the cross-sectional structure of the phase change cold plate provided by the present utility model.

[0021] Figure 3 This is a schematic diagram of the top view of the phase change cold plate provided by the utility model.

[0022] Figure 4 This is a schematic diagram of the phase change cold plate cooling system provided by the present invention.

[0023] In the figure, heat exchange plate 1, phase change cold plate 10, working fluid inlet 11, working fluid outlet 12, lower plate body 2, heat exchange flow channel 21, upper plate body 3, retention cavity 31, connecting channel 32, steam outlet 33, heat exchange cavity 4, capillary plate 41, heat exchange protrusion 42, annular step 43, throttling element 5, fluorine pump 6, liquid storage tank 7, pressure relief valve 71, vapor-liquid separator 8, liquid outlet 81, steam outlet 82, pressure regulating valve 83, and condenser 9. DETAILED DESCRIPTION

[0024] Example 1

[0025] like Figures 1 to 3 As shown, a phase change cold plate includes a heat exchange plate 1, which includes a lower plate body 2 and an upper plate body 3. The lower plate body 2 and the upper plate body 3 are fixedly connected by welding. A heat exchange chamber 4 is provided between the lower plate body 2 and the upper plate body 3. The heat exchange chamber 4 is connected to the working medium inlet 11 on the side of the heat exchange plate 1 through a heat exchange flow channel 21. A retention chamber 31 is opened in the upper plate body 3. The retention chamber 31 is connected to the heat exchange chamber 4 through a connecting channel 32, and a capillary plate 41 is provided between the connecting channel 32 and the heat exchange chamber 4. A steam outlet 33 is provided on the upper part of the retention chamber 31, and the steam outlet 33 is connected to the working medium outlet 12 provided on the heat exchange plate 1 to enable it to communicate with the outside.

[0026] In this embodiment, the working fluid enters the phase change cold plate 10 through the working fluid inlet 11, performs pre-heat exchange while flowing through the heat exchange channel 21, and absorbs heat from the heat source below the lower plate body 2 after reaching the heat exchange chamber 4. After vaporization, the working fluid enters the retention chamber 31 through the capillary plate 41, continues to exchange heat, and is finally discharged through the working fluid outlet 12; the process of phase change of the working fluid can absorb a large amount of heat, thereby achieving the effect of improving the heat exchange efficiency.

[0027] More specifically, the working medium outlet 12 is arranged at the top of the upper plate body 3 ; the heat exchange cavity 4 and the heat exchange flow channel 21 are both arranged at the top of the lower plate body 2 ; and the working medium inlet 11 is arranged at the side of the lower plate body 2 .

[0028] More specifically, the maximum inner diameter of the accommodation cavity 31 is greater than the diameter of the connecting channel 32, and the working medium outlet 12 is arranged at one side of the connecting channel 32 when the upper plate body 3 is arranged at the top.

[0029] More specifically, the capillary plate 41 is fixed in the connecting channel 32 or at the top of the heat exchange cavity 4; the capillary plate 41 is embedded on the annular step 43 above the heat exchange cavity 4, and the upper end abuts against the bottom surface of the upper plate body 3; a plurality of heat exchange protrusions 42 arranged in a rectangular array are arranged in the heat exchange cavity 4, and the heat exchange protrusions 42 are integrated with the lower plate body 2.

[0030] As shown in Figure 4 A phase change cold plate cooling system, including the phase change cold plate 10 as above, the working medium inlet 11 of the phase change cold plate 10 is connected to the throttling element 5, the fluorine pump 6 and the liquid storage tank 7 in sequence, the working medium outlet 12 is connected to the vapor-liquid separator 8, the vapor outlet 82 of the vapor-liquid separator 8 is connected to the liquid storage tank 7 through the condenser 9, and the liquid outlet 81 of the vapor-liquid separator 8 is connected to the liquid storage tank 7; the throttling element 5 is an electronic regulating valve.

[0031] More specifically, the liquid outlet 81 is connected to the liquid storage tank 7 through the pressure regulating valve 83, and the liquid storage tank 7 is connected with the pressure relief valve 71.

[0032] The working principle of the embodiment is that the fluorine pump 6 provides power to transport the working medium in the liquid storage tank 7 to the phase change cold plate 10 through the throttling element 5 for phase change heat exchange;

[0033] The working medium enters the phase change cold plate 10 through the working medium inlet 11, pre-heats while flowing through the heat exchange flow channel 21, absorbs heat from the heat source below the lower plate body 2 after reaching the heat exchange cavity 4, and vaporizes into the accommodation cavity 31 through the capillary plate 41 after reaching the heat exchange cavity 4, and finally is discharged through the working medium outlet 12 after further heat exchange;

[0034] The working medium after heat exchange is discharged to the vapor-liquid separator 8, the liquid working medium is returned to the liquid storage tank 7 through the liquid outlet 81 and the pressure regulating valve 83, and the gaseous working medium is discharged to the condenser 9 through the vapor outlet 82, and then is returned to the liquid storage tank 7 after condensation to complete the cycle.

[0035] Example Two

[0036] The content of the embodiment is basically the same as that of Example One, and the difference is that the working medium outlet 12 is arranged at the upper end side of the upper plate body 3.

[0037] In the embodiment, the working medium outlet 12 is arranged at the upper end side of the upper plate body 3, which is suitable for different connection modes, ensures that the steam can be smoothly discharged, and has the effect of improving the heat transfer efficiency.

[0038] Example Three

[0039] The content of the embodiment is basically the same as that of Embodiment One, and the difference is that the capillary plate 41 is embedded on the annular step 43 at the lower end of the connecting channel 32, and the lower end is abutted on the top surface of the upper plate body 3.

[0040] In the embodiment, by embedding the capillary plate 41 on the annular step 43 and abutting, the effect of improving the connection stability of the capillary plate 41 is achieved.

[0041] The specific embodiments described herein are merely illustrative of the spirit of the utility model. Those skilled in the art to which the utility model belongs can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the utility model or exceed the scope defined by the appended claims.

[0042] Although the terms such as heat exchange plate, phase change cold plate, working medium inlet, working medium outlet, lower plate body, heat exchange flow channel, upper plate body, accommodation cavity, connecting channel, steam outlet, heat exchange cavity, capillary plate, heat exchange protrusion, annular step, throttling element, fluorine pump, liquid storage tank, pressure relief valve, vapor-liquid separator, liquid outlet, steam outlet, pressure regulating valve, condenser, etc. are used more frequently herein, but the possibility of using other terms is not excluded. Using these terms is only to more conveniently describe and explain the essence of the utility model, and it is contrary to the spirit of the utility model to interpret them as any kind of additional limitation.

Claims

1. A phase change cold plate, characterized in that: The heat exchange plate (1) comprises a lower plate body (2) and an upper plate body (3), wherein the lower plate body (2) and the upper plate body (3) are fixedly connected, and a heat exchange chamber (4) is provided between the lower plate body (2) and the upper plate body (3), wherein the heat exchange chamber (4) is communicated with a working medium inlet (11) on the side of the heat exchange plate (1) through a heat exchange flow channel (21), and a retention chamber (31) is provided in the upper plate body (3), wherein the retention chamber (31) is communicated with the heat exchange chamber (4) through a connecting channel (32), and a capillary plate (41) is provided between the connecting channel (32) and the heat exchange chamber (4), and a steam outlet (33) is provided on the upper part of the retention chamber (31), wherein the steam outlet (33) is communicated with a working medium outlet (12) provided on the heat exchange plate (1) so as to be communicated with the outside.

2. The phase change cold plate according to claim 1, characterized in that: The working medium outlet (12) is arranged on the top of the upper plate body (3); Or it is arranged on the upper end side of the upper plate body (3).

3. The phase change cold plate according to claim 1, characterized in that: The maximum inner diameter of the retention cavity (31) is greater than the diameter of the connecting channel (32), and the working medium outlet (12) is located on one side of the connecting channel (32) when it is arranged on the top of the upper plate body (3).

4. The phase change cold plate according to claim 1, 2 or 3, characterized in that: The heat exchange cavity (4) and the heat exchange flow channel (21) are both arranged on the top of the lower plate body (2), and the working medium inlet (11) is arranged on the side of the lower plate body (2).

5. The phase change cold plate according to claim 4, characterized in that: A plurality of heat exchange protrusions (42) distributed in a rectangular array are provided in the heat exchange cavity (4), and the heat exchange protrusions (42) are integrally connected to the lower plate body (2).

6. The phase change cold plate according to claim 1, 2 or 3, characterized in that: The capillary plate (41) is fixed in the connecting channel (32) or on the top of the heat exchange cavity (4).

7. The phase change cold plate according to claim 6, characterized in that: The capillary plate (41) is embedded in the annular step (43) above the heat exchange chamber (4), and the upper end thereof abuts against the bottom surface of the upper plate body (3); Alternatively, the capillary plate (41) is embedded in the annular step (43) at the lower end of the connecting channel (32), and the lower end abuts against the top surface of the upper plate body (3).

8. A phase change cold plate cooling system, characterized in that: It comprises a phase change cold plate (10) as described in any one of claims 1 to 7, wherein the working medium inlet (11) of the phase change cold plate (10) is connected to a throttling element (5), a fluorine pump (6) and a liquid storage tank (7) in sequence, the working medium outlet (12) is connected to a vapor-liquid separator (8), the vapor outlet (82) of the vapor-liquid separator (8) is connected to the liquid storage tank (7) through a condenser (9), and the liquid outlet (81) of the vapor-liquid separator (8) is connected to the liquid storage tank (7).

9. The phase change cold plate cooling system according to claim 8, characterized in that: The liquid outlet (81) is connected to the liquid storage tank (7) via a pressure regulating valve (83); The liquid storage tank (7) is connected to a pressure relief valve (71).

10. The phase change cold plate cooling system according to claim 8, characterized in that: The throttling element (5) includes any one of a capillary tube, a throttling short tube, an expansion valve or an electronic regulating valve.

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