Heat dissipation system and heat exchange equipment

Abstract

The embodiment of the invention provides a heat dissipation system and heat exchange equipment, and the heat dissipation system comprises an equipment side heat exchange pipeline which is used for being connected with a to-be-cooled equipment pipeline, a working medium flows in the equipment side heat exchange pipeline to cool the to-be-cooled equipment, and the equipment side heat exchange pipeline is provided with a heat exchanger; the heat pump circulating pipeline is provided with a boiling heat exchanger, the boiling heat exchanger is used for cooling a refrigerant in the heat pump circulating pipeline, and the heat exchanger is communicated with the heat pump circulating pipeline so as to cool a working medium of the heat exchanger through the refrigerant of the heat pump circulating pipeline; and the heat sink box body is used for containing cooling liquid and the boiling heat exchanger, and the boiling point of the cooling liquid under the preset pressure is lower than the temperature of a refrigerant in the boiling heat exchanger, so that the cooling liquid is boiled to absorb heat to cool the refrigerant in the boiling heat exchanger. The heat dissipation system can be used for efficient heat dissipation under long-time operation of high-power equipment; and the heat dissipation system is compact in structure, high in heat exchange coefficient and easy for miniaturization design and arrangement.

Description

Technical Field

[0001] This application relates to the technical field of refrigeration and heat dissipation, and specifically, to a heat dissipation system and a heat exchange device. Background Art

[0002] When a high-power device operates for a long time and dissipates heat, the ultimate cold source is generally external air. However, the heat transfer coefficient of an air-cooled radiator is generally very low, which makes the heat dissipation system complex in structure, extremely large in volume, high in maintenance cost, and requires a dedicated person to be on duty during the heat dissipation process of a particularly large system.

[0003] Generally speaking, there are the following difficulties in the long-term heat dissipation of high-power devices:

[0004] (1) The air-cooled heat transfer coefficient is generally low. As a result, when the heat dissipation power is large, if the ultimate heat dissipation cold source adopts the air-cooled heat transfer method, the size of the air-cooled heat exchanger of the heat dissipation system is huge, which in turn leads to a huge volume of the entire heat dissipation system;

[0005] (2) When using air-cooled heat dissipation, the heat transfer coefficient is strongly related to the air volume of heat exchange. If it is deployed on a vehicle body, such as when the vehicle body is not running, it is necessary to additionally turn on the fan for heat exchange. Summary of the Invention

[0006] In the embodiments of this application, a heat dissipation system and a heat exchange device are provided to solve the problems of low heat transfer coefficient of the existing air-cooled radiator and complex structure that is not convenient for arrangement on the vehicle body.

[0007] To achieve the above object, this application provides the following technical solutions:

[0008] A heat dissipation system includes:

[0009] An equipment-side heat exchange pipeline, which is used to be connected to the pipeline of the equipment to be cooled, and the working medium flows in the equipment-side heat exchange pipeline to cool the equipment to be cooled. The equipment-side heat exchange pipeline has a heat exchanger;

[0010] A heat pump circulation pipeline, which has a boiling heat exchanger. The heat pump circulation pipeline is connected to the heat exchanger to cool the working medium of the heat exchanger through the refrigerant of the heat pump circulation pipeline;

[0011] A heat sink box, which is used to place the coolant and the boiling heat exchanger. The boiling point of the coolant under a preset pressure is lower than the temperature of the refrigerant in the boiling heat exchanger, so that the coolant boils and absorbs heat to cool the refrigerant in the boiling heat exchanger.

[0012] Optionally, the heat sink box has a sealed cavity, and the top of the heat sink box has an air outlet;

[0013] The heat dissipation system further includes a vacuum pumping assembly, which is connected to the air outlet and is used to evacuate the heat sink box to make the pressure of the heat sink box reach a preset pressure.

[0014] Optionally, the heat pump circulation pipeline further includes:

[0015] A compressor and a throttling element. One end of the compressor is connected to the refrigerant liquid outlet end of the heat exchanger through a pipeline, and the other end is connected to the liquid inlet end of the boiling heat exchanger; the liquid outlet end of the boiling heat exchanger is connected to one end of the throttling element, and the other end of the throttling element is connected to the refrigerant inlet end of the heat exchanger.

[0016] Optionally, the heat sink box has a liquid inlet;

[0017] The heat dissipation system further includes:

[0018] A liquid inlet assembly, which is communicated with the liquid inlet to supplement the coolant into the heat sink box.

[0019] Optionally, the liquid inlet assembly includes:

[0020] A liquid inlet pipeline and a liquid inlet control valve. The liquid inlet pipeline is communicated with the liquid inlet, and the liquid inlet control valve is located on the liquid inlet pipeline and is used to control the on-off of the liquid inlet pipeline.

[0021] Optionally, it further includes:

[0022] A liquid level detection assembly, which is used to detect the coolant level in the heat sink box.

[0023] Optionally, it further includes:

[0024] A pressure detection assembly, which is located in the heat sink box and is used to detect the internal cavity pressure of the heat sink box.

[0025] Optionally, the equipment-side heat exchange pipeline further includes:

[0026] A circulation pump and a water storage tank. One end of the circulation pump is connected to the outlet end of the water storage tank, and the other end of the circulation pump is connected to the equipment to be cooled and the working fluid inlet end of the heat exchanger through a pipeline in sequence. The working fluid outlet end of the heat exchanger is connected to the inlet end of the water storage tank.

[0027] This application provides a heat exchange device, including the heat dissipation system according to any one of the above embodiments.

[0028] The heat dissipation system provided by the embodiment of the present application includes: an equipment-side heat exchange pipeline for connecting with the pipeline of the equipment to be cooled, and a working medium flows in the equipment-side heat exchange pipeline to cool the equipment to be cooled. The equipment-side heat exchange pipeline is provided with a heat exchanger; a heat pump circulation pipeline is provided with a boiling heat exchanger, and the boiling heat exchanger is used to cool the refrigerant in the heat pump circulation pipeline. The heat exchanger is communicated with the heat pump circulation pipeline to cool the working medium in the heat exchanger through the refrigerant in the heat pump circulation pipeline; a heat sink box body is used to place the coolant and the boiling heat exchanger, and the boiling point of the coolant under a preset pressure is lower than the temperature of the refrigerant in the boiling heat exchanger, so that the coolant boils and absorbs heat to cool the refrigerant in the boiling heat exchanger.

[0029] Adopting the heat dissipation system provided by the embodiment of the present application, compared with the prior art, has the following technical effects:

[0030] The equipment-side heat exchange pipeline is connected to the equipment to be cooled, and the working medium flows in the equipment-side heat exchange pipeline to cool the equipment to be cooled. At the same time, the equipment-side heat exchange pipeline is provided with a heat exchanger, and the heat exchanger is connected to the heat pump circulation pipeline. The heat pump circulation pipeline is provided with a boiling heat exchanger, which is located in the heat sink box body. The heat sink box body cools the refrigerant in the boiling heat exchanger by the boiling and heat absorption of the coolant, and the cooled refrigerant cools the working medium in the equipment-side heat exchange pipeline; there is no need to additionally set up a fan to cool the boiling heat exchanger, so as to reduce the requirements for the installation space of the heat dissipation system and improve the applicability; the above heat dissipation system can be used for efficient heat dissipation of high-power equipment during long-term operation; and the heat dissipation system has a compact structure, a high heat transfer coefficient, is easy to be miniaturized and arranged, and meets the needs of high-power heat dissipation equipment with limited design or installation space for pipeline trains. Description of the Drawings

[0031] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation to the present application. In the drawings:

[0032] Figure 1 is the system schematic diagram of a heat dissipation system provided by the embodiment of the present application;

[0033] Figure 2 is the structural schematic diagram of a heat dissipation system provided by the embodiment of the present application.

[0034] The reference numerals in the drawings are as follows:

[0035] Circulation pump 1, equipment to be cooled 2, water storage tank 3, heat exchanger 4, compressor 5, throttling element 6, boiling heat exchanger 7, heat sink box body 8, liquid inlet assembly 9, vacuum pump 10. Detailed Embodiments

[0036] Embodiments of the present invention disclose a heat dissipation system and a heat exchange device to solve the problems of low heat transfer coefficient and complex structure of existing air-cooled radiators, which are not convenient for layout on the vehicle body.

[0037] In order to make the technical solutions and advantages in the embodiments of the present application clearer and more understandable, the following further details the exemplary embodiments of the present application with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than an exhaustive list of all embodiments. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0038] Please refer to Figure 1-2 , Figure 1 which is the system schematic diagram of a heat dissipation system provided by an embodiment of the present application; Figure 2 which is the structural schematic diagram of a heat dissipation system provided by an embodiment of the present application.

[0039] In a specific implementation manner, the heat dissipation system provided by the present application includes:

[0040] An equipment-side heat exchange pipeline for connecting with the pipeline of the equipment to be cooled 2. The working medium flows in the equipment-side heat exchange pipeline to cool the equipment to be cooled 2, and the equipment-side heat exchange pipeline has a heat exchanger 4;

[0041] A heat pump cycle pipeline with a boiling heat exchanger. The heat exchanger 4 is connected to the heat pump cycle pipeline to cool the working medium in the equipment-side heat exchange pipeline through the refrigerant in the heat pump cycle pipeline; it can be understood that the working medium in the equipment-side heat exchange pipeline and the refrigerant in the heat pump cycle pipeline are independent pipelines, and the working medium and refrigerant in the two pipelines do not contact each other;

[0042] A heat sink box 8 for placing the coolant and the boiling heat exchanger. The boiling point of the coolant under a preset pressure is lower than the temperature of the refrigerant in the boiling heat exchanger, so that the coolant boils and absorbs heat to cool the refrigerant in the boiling heat exchanger.

[0043] The equipment-side heat exchange pipeline cools the equipment to be cooled through the working medium. The working medium flowing through the equipment to be cooled flows into the heat exchanger 4, and the heat pump cycle pipeline absorbs heat and cools down the working medium in the heat exchanger 4; the heat pump cycle pipeline absorbs heat on the equipment side through the heat exchanger and releases heat on the side of the boiling heat exchanger. Specifically, the boiling heat exchanger is placed in the heat sink box 8. The boiling point of the coolant under a preset pressure is lower than the temperature of the refrigerant in the boiling heat exchanger. The coolant quickly absorbs the heat of the refrigerant in the boiling heat exchanger, accelerating the cooling effect on the boiling heat exchanger, so that the coolant boils and absorbs heat to cool the refrigerant in the boiling heat exchanger, and the refrigerant is cooled through the heat sink box 8. Without the need to additionally set up devices such as fans, compared with the prior art, the heat dissipation system of the present application uses a boiling heat exchanger 7 to cool the refrigerant, which has a compact structure, a large heat transfer coefficient, and can achieve efficient heat dissipation.

[0044] The heat pump drives the refrigerant to reciprocate in the heat pump circulation pipeline. The heat pump circulation pipeline is connected to the heat exchanger 4. The refrigerant in the heat pump circulation pipeline cools the working medium in the heat exchanger 4, and the refrigerant is cooled by the boiling heat exchanger to take away the heat of the working medium in the heat exchanger 4 through the circulating flow.

[0045] Among them, the working medium can be set as water, and the refrigerant and the coolant can be set as water or aqueous solution, which are low-cost and easy to obtain; in other embodiments, the specific forms of the above-mentioned working medium, refrigerant and coolant can be set according to needs.

[0046] Specifically, the heat sink box 8 has a receiving cavity for placing the coolant and the boiling heat exchanger 7. The receiving cavity is filled with the coolant, and the boiling heat exchanger 7 is placed in the receiving cavity. Preferably, the boiling heat exchanger 7 is located below the liquid level of the coolant to increase the contact area and improve the heat exchange effect. It can be understood that the receiving cavity can be a closed cavity or an open cavity. It can be understood that when the temperature of the boiling heat exchanger 7 after the thermodynamic cycle is higher than the saturation temperature of the coolant under the local pressure, an open container can be directly used; if the temperature of the boiling heat exchanger 7 after the thermodynamic cycle is lower than the saturation temperature of the coolant under the local pressure, or the cost of raising the temperature of the coolant to be higher than the saturation temperature under the local pressure is too high, a closed cavity can be adopted, and the pressure in the closed cavity can be reduced through a pressure reducing device to reduce the boiling point of the coolant and ensure that the boiling phenomenon continues to occur. After passing through the boiling heat exchanger 7, the heat is continuously released from one side of the heat pump circulation pipeline to the coolant. After the coolant boils, the heat is continuously exported to realize the final closure of the heat dissipation system. The above preset pressure can be the local pressure, or the set pressure obtained by the action of a pressure maintaining device on the receiving cavity.

[0047] The equipment-side heat exchange pipeline is connected to the heat pump circulation pipeline through the heat exchanger 4. The refrigerant in the heat pump circulation pipeline absorbs the heat dissipated by the equipment to be cooled 2 in the working medium through the heat exchanger 4, and the continuous cooling of the equipment is realized through the circulating flow of the working medium in the equipment-side heat exchange pipeline.

[0048] Adopting a heat dissipation system provided in the embodiment of the present application, compared with the prior art, has the following technical effects:

[0049] The equipment-side heat exchange pipeline is connected to the equipment to be cooled. The working medium flows in the equipment-side heat exchange pipeline to cool the equipment to be cooled. At the same time, the equipment-side heat exchange pipeline has a heat exchanger, and the heat exchanger is connected to the heat pump circulation pipeline. The heat pump circulation pipeline has a boiling heat exchanger, which is located in the heat sink box 8. The heat sink box 8 cools the refrigerant of the boiling heat exchanger through boiling heat absorption, and the cooled refrigerant cools the working medium in the equipment-side heat exchange pipeline. The above heat dissipation system can be used for the efficient heat dissipation of high-power equipment during long-term operation; and the heat dissipation system has a compact structure, a high heat transfer coefficient, is easy to be miniaturized and arranged, and meets the design requirements of the pipeline train.

[0050] In this embodiment, the heat sink housing 8 is a closed cavity. The heat sink housing 8 has an air outlet, preferably located at the top of the heat sink housing 8. The air outlet is connected to the accommodation chamber, and the steam generated after the coolant boils is discharged from the air outlet. The heat dissipation system further includes a vacuum pumping assembly connected to the air outlet for evacuating the heat sink housing 8 to make the pressure in the accommodation chamber reach a preset pressure. The vacuum pumping assembly can be specifically set as a vacuum pump 10.

[0051] The vacuum pumping assembly is used to evacuate the heat sink housing 8 so that the heat sink housing 8 reaches a preset pressure. The saturation temperature (boiling point) of the coolant at the preset pressure is lower than the temperature of the refrigerant in the boiling heat exchanger 7. The coolant boils and absorbs heat to cool the refrigerant in the boiling heat exchanger 7. The vacuum pumping assembly evacuates the accommodation chamber, reducing the pressure in the accommodation chamber and lowering the boiling point of the coolant. When the pressure in the accommodation chamber drops to the preset pressure, the boiling point of the coolant at this preset pressure is lower than the temperature of the refrigerant in the boiling heat exchanger 7, creating a temperature difference between the coolant and the refrigerant in the boiling heat exchanger 7, enabling heat to transfer from high to low, and the coolant absorbs heat from the refrigerant in the boiling heat exchanger 7. The vacuum pumping assembly keeps the accommodation chamber at the preset pressure, ensuring the continuous boiling of the coolant and achieving the purpose of dissipating heat for the condenser by the coolant boiling and absorbing heat. The steam generated by the coolant absorbing heat and boiling is pumped out to the atmosphere by the vacuum pumping assembly.

[0052] Specifically, the heat dissipation system further includes a pressure detection assembly located inside the heat sink housing 8 to detect the internal cavity pressure of the heat sink housing 8 and capable of controlling the operation of the vacuum pumping device to further ensure that the heat sink housing 8 continuously maintains at the preset pressure.

[0053] In another embodiment, the heat sink housing 8 has a liquid inlet. The heat dissipation system further includes a liquid inlet assembly 9 connected to the liquid inlet to replenish the coolant in the heat sink housing 8, compensating for the liquid level difference reduced due to the continuous boiling of the coolant, so that the liquid level of the coolant in the accommodation chamber always remains at a preset height, thereby ensuring that the boiling heat exchanger 7 is always below the liquid level of the coolant and improving the cooling effect on the boiling heat exchanger 7. In this embodiment, the liquid inlet assembly 9 includes a liquid inlet pipeline and a liquid inlet control valve. The liquid inlet pipeline is connected to the liquid inlet, and the liquid inlet control valve is located on the liquid inlet pipeline for controlling the on-off of the liquid inlet pipeline.

[0054] One end of the liquid inlet pipeline extends into the heat sink box body 8 and is communicated with the liquid inlet. The liquid inlet control valve is located on the liquid inlet pipeline, preferably on a part of the liquid inlet pipeline outside the heat sink box body 8, so as to reduce the interference of the vacuum pumping in the heat sink box body 8 on the device operation and ensure the accuracy of the on-off operation of the liquid inlet pipeline. When the coolant liquid level in the heat sink box body 8 is in the state of waiting for liquid replenishment, the liquid inlet control valve is controlled to open to replenish the coolant for the heat sink box body 8; when the coolant liquid level in the heat sink box body 8 reaches the preset liquid level, the liquid inlet control valve is controlled to close to stop replenishing the heat sink box body 8 with liquid.

[0055] In one embodiment, a liquid level detection component is provided in the heat sink box body 8. The liquid level detection component is used to detect the coolant liquid level in the heat sink box body 8. When the liquid level is lower than the top surface of the boiling heat exchanger 7, the liquid inlet control valve is controlled to open to replenish the heat sink box body 8 with liquid; when the coolant liquid level in the heat sink box body 8 reaches the preset liquid level after replenishment, the liquid inlet control valve is controlled to close to stop replenishing the liquid; the liquid level detection component can be a liquid level gauge or a liquid level sensor, which can be set according to needs and are all within the protection scope of this application.

[0056] On the basis of the above embodiments, the heat pump circulation pipeline further has a compressor 5 and a throttling element 6. One end of the compressor 5 is connected to the refrigerant liquid outlet end of the heat exchanger 4 through a pipeline, and the other end is connected to the liquid inlet end of the boiling heat exchanger 7; the liquid outlet end of the boiling heat exchanger 7 is connected to one end of the throttling element 6, and the other end of the throttling element 6 is connected to the refrigerant liquid inlet end of the heat exchanger 4. The throttling element 6 can be set as a throttle valve. In another embodiment, the heat pump circulation pipeline can have a pumping device, and the pumping device is connected to the refrigerant liquid outlet end of the heat exchanger 4 to directly transport the refrigerant into the boiling heat exchanger 7 for cooling; in other embodiments, the specific structure of the heat pump circulation pipeline can be set according to needs as long as the same technical effect can be achieved.

[0057] On the basis of the above embodiments, the equipment-side heat exchange pipeline further includes:

[0058] A circulation pump 1 and a water storage tank 3. One end of the circulation pump 1 is connected to the outlet end of the water storage tank 3, and the other end of the circulation pump 1 is sequentially connected to the equipment to be cooled 2 and the working medium liquid inlet end of the heat exchanger 4 through a pipeline. The working medium liquid outlet end of the heat exchanger 4 is connected to the inlet end of the water storage tank 3. Through the flow of the working medium in the equipment-side heat exchange pipeline, the cooling of the equipment to be cooled 2 is realized; the heat pump circulation pipeline is connected to the heat exchanger 4, and the refrigerant in the heat pump circulation pipeline cools the working medium in the heat exchanger 4.

[0059] The above system adopts the characteristics of large latent heat and strong heat absorption capacity in the liquid-vapor phase change process. Through the boiling heat exchanger 7 and the heat pump circulation pipeline, the refrigerant in the heat pump circulation pipeline absorbs heat through the boiling of the coolant, and the heat of the equipment is taken away through the boiling of the liquid, realizing the efficient heat dissipation of high-power equipment.

[0060] In a specific embodiment, the equipment side heat exchange pipeline of the present application has a water storage tank 3, a circulating pump 1 and a heat exchanger 4 to construct the equipment side heat exchange pipeline. The circulating pump 1 drives the liquid to flow in the pipeline to continuously transfer heat from the equipment side to the heat pump circulation pipeline side; the heat pump circulation pipeline side includes a compressor 5, a throttling element 6, and a boiling heat exchanger. The steam compression heat pump realizes continuous absorption of heat on the equipment side through the circulation of the refrigerant, and continuously releases heat through the boiling heat exchanger 7; the final heat sink is an open water tank or a pressure reducing tank closed water tank container, and the boiling heat exchanger 7 is immersed in the heat sink box 8, so that the temperature of the water inside the heat sink box 8 is higher than the liquid saturation temperature corresponding to the pressure inside the heat sink box 8. The inside of the boiling heat exchanger 7 is a high-temperature refrigerant, and the heat continuously heats the coolant in the accommodating cavity. After the coolant boils, it absorbs heat and vaporizes into steam to export the heat.

[0061] Based on the heat dissipation system provided in the above embodiments, the present application also provides a heat exchange device, including the heat dissipation system described in any one of the above embodiments. Since the above heat dissipation system has the above technical effects, the heat exchange device having the heat dissipation system should also have corresponding technical effects.

[0062] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0063] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A heat dissipation system, characterized in that, Comprising: An equipment-side heat exchange pipeline for connecting with the pipeline of the equipment to be cooled. The working medium flows in the equipment-side heat exchange pipeline to cool the equipment to be cooled, and the equipment-side heat exchange pipeline is provided with a heat exchanger. A heat pump cycle pipeline with a boiling heat exchanger. The heat pump cycle pipeline is connected to the heat exchanger to cool the working medium of the heat exchanger through the refrigerant of the heat pump cycle pipeline. A heat sink box for placing the coolant and the boiling heat exchanger. The boiling point of the coolant under a preset pressure is lower than the temperature of the refrigerant in the boiling heat exchanger, so that the coolant boils and absorbs heat to cool the refrigerant in the boiling heat exchanger.

2. The heat dissipation system according to claim 1, wherein The heat sink box has a sealed cavity, and the top of the heat sink box has an air outlet. The heat dissipation system further includes a vacuum suction assembly connected to the air outlet for evacuating the heat sink box to make the pressure of the heat sink box reach the preset pressure.

3. The heat dissipation system according to any one of claims 1-2, characterized in that, The heat pump cycle pipeline further includes: A compressor and a throttling element. One end of the compressor is connected to the liquid outlet end of the refrigerant of the heat exchanger through a pipeline, and the other end is connected to the liquid inlet end of the boiling heat exchanger. The liquid outlet end of the boiling heat exchanger is connected to one end of the throttling element, and the other end of the throttling element is connected to the liquid inlet end of the refrigerant of the heat exchanger.

4. The heat dissipation system according to claim 3, characterized in that, The heat sink box has a liquid inlet. The heat dissipation system further includes: A liquid inlet assembly connected to the liquid inlet to replenish the coolant into the heat sink box.

5. The heat dissipation system according to claim 4, wherein The liquid inlet assembly includes: A liquid inlet pipeline and a liquid inlet control valve. The liquid inlet pipeline is connected to the liquid inlet, and the liquid inlet control valve is located on the liquid inlet pipeline for controlling the on-off of the liquid inlet pipeline.

6. The heat dissipation system according to claim 5, characterized in that, Further comprising: A liquid level detection assembly for detecting the liquid level of the coolant in the heat sink box.

7. The heat dissipation system according to claim 6, characterized in that, Further comprising: A pressure detection assembly located in the heat sink box for detecting the internal cavity pressure of the heat sink box.

8. The heat dissipation system according to claim 1, characterized in that The equipment-side heat exchange pipeline further includes: A circulation pump and a water storage tank. One end of the circulation pump is connected to the outlet end of the water storage tank, and the other end of the circulation pump is connected to the equipment to be cooled and the liquid inlet end of the working medium of the heat exchanger through a pipeline in sequence. The liquid outlet end of the working medium of the heat exchanger is connected to the inlet end of the water storage tank.

9. A heat exchange device, characterized in that, Comprising the heat dissipation system according to any one of claims 1-8.

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