Multi-path liquid supply liquid-gas phase change cold plate

Abstract

The invention relates to a multi-path liquid supply liquid-gas phase change cold plate, and belongs to the technical field of thermal control. By means of liquid separation and small-flow dispersed liquid supply, the coolant is evenly conveyed into the perforated plate, the coolant is stored in the perforated plate in a liquid state through the capillary cavities evenly distributed in the perforated plate, when heat of a temperature control object is conducted to the liquid coolant in the perforated plate through the wall of the phase change container, the coolant is heated and gasified, and the temperature of the coolant is controlled. The bubbles break through the tension of the liquid level of the capillary cavity, so that a continuous liquid-gas phase change heat absorption process is triggered, the strength of the liquid-gas phase change process is controlled, and stable and continuous cooling of a temperature control object is achieved.

Description

Technical Field

[0001] The invention relates to a liquid-gas phase change cold plate with multi-channel liquid supply, belonging to the technical field of thermal control. Background Art

[0002] The phase change cold plate utilizes the latent heat of phase change of liquid or solid refrigerant during liquid-to-gas phase change or solid-to-liquid phase change to absorb the heat of the temperature-controlled object, thereby achieving temperature control of the temperature-controlled object.

[0003] At present, there are many studies on solid-liquid phase change cold plates at home and abroad, and they have been applied in practice, and the technology and products are mature, but there are few studies on liquid-gas phase change cold plates. Compared with solid-liquid phase change, liquid-gas phase change has the characteristics of fast cooling speed and high heat exchange efficiency, and has advantages in temperature control applications with high heat flux density. However, the liquid-gas phase change process is more intense, the process volume and temperature change greatly, it is not easy to control, and it is not easy to meet the temperature control accuracy requirements. Summary of the invention

[0004] The technical problem to be solved by the present invention is: to overcome the deficiencies of the prior art, to provide a liquid-gas phase change cold plate with multi-channel liquid supply, to solve the problem that the liquid-gas phase change process is difficult to control, and to provide a solution for the practical application of the liquid-gas phase change cold plate. The present invention uniformly transports the coolant to the porous plate by means of liquid separation and small flow dispersed liquid supply, and stores the coolant in the porous plate in liquid form through the capillary cavities evenly distributed on the porous plate. When the heat of the temperature-controlled object is transferred to the liquid coolant in the porous plate through the wall of the phase change container, the coolant heats up and vaporizes, and the bubbles break through the liquid surface tension of the capillary cavity, thereby initiating a continuous liquid-gas phase change endothermic process, controlling the intensity of the liquid-gas phase change process, and achieving stable and continuous cooling of the temperature-controlled object. The present invention aims to achieve stable and continuous temperature control in view of the problem that the liquid-gas phase change is difficult to control, and can be applied in the fields of ground electronic equipment temperature control and aircraft cabin equipment temperature control.

[0005] The technical solution of the present invention is:

[0006] A liquid-gas phase change cooling plate with multiple liquid supply paths, the liquid-gas phase change cooling plate comprising a liquid distributor 1, a liquid distribution pipeline 2, a porous plate 3 and a phase change container 4;

[0007] The liquid distributor 1 comprises a liquid distributor port 5, a liquid inlet 6 and a plurality of symmetrically arranged liquid distributor outlet joints 7, which can achieve uniform distribution of the coolant liquid;

[0008] The liquid dispensing pipeline 2 includes a symmetrical multi-channel liquid dispensing tube 8, one end of the liquid dispensing tube 8 is connected to the liquid outlet joint 7 of the liquid dispenser 1, and the other end of the liquid dispensing tube 8 is connected to the liquid inlet joint 9 of the phase change container, and the liquid dispensing tube 8 extends into the prefabricated circular groove 10 of the porous plate 3 through the liquid inlet joint 9 of the phase change container;

[0009] The liquid dispensing tube 8 extends into the inner part of the circular groove 10 prefabricated on the porous plate 3, and a plurality of symmetrical small circular through holes 11 facing the surface of the circular groove prefabricated on the porous plate are evenly distributed on the tube wall along the tube axis direction. The coolant flowing in the liquid dispensing pipeline 2 flows out from the plurality of small circular through holes on the liquid dispensing tube 8 and then enters the circular groove 10 prefabricated on the porous plate 3;

[0010] The porous plate 3 is a micro-porous plate made of powder sintering, metal fiber sintering or woven wire mesh sintering, and has a prefabricated circular groove 10 on the porous plate. The porous plate 3 is in close contact with the phase change container 4, and has uniformly distributed capillary cavities on the porous plate 3. Under the action of capillary force, the coolant entering the prefabricated circular groove 10 of the porous plate 3 is adsorbed into the porous plate 3, thereby realizing the storage management of the coolant liquid.

[0011] The phase change container 4 includes a phase change container shell 12 and a phase change container liquid inlet joint 9, and the phase change container shell 12 is in close contact with the temperature control object to reduce the contact thermal resistance; the phase change container shell 12 is processed with an internal thread, and the phase change container liquid inlet joint 9 is connected to the phase change container shell 12 through the thread and keeps sealed, and the phase change container shell 12 is in close contact with the temperature control object to reduce the contact thermal resistance;

[0012] The coolant from the external circuit is divided into the liquid separation pipeline through the liquid separator. One end of the liquid separation pipeline is connected to the liquid separator, and the other end is connected to the phase change container. The coolant flows in the liquid separation pipeline. The liquid separation tube is arranged in the circular groove prefabricated on the porous plate in the inner part of the phase change container. The coolant flows in the liquid separation pipeline. The liquid separation tube is arranged in the circular groove prefabricated on the porous plate in the inner part of the phase change container. The coolant flows in the liquid separation pipeline from the multiple small circular through holes on the liquid separation tube and immediately enters the circular groove prefabricated on the porous plate. There are uniformly distributed capillary cavities on the porous plate. Under the action of capillary force, the coolant entering the circular groove prefabricated on the porous plate is adsorbed into the inside of the porous plate, thereby realizing the storage management of the coolant liquid. The porous plate and the phase change container, the phase change container shell and the temperature control object are in close contact to reduce the contact thermal resistance. The heat generated by the temperature control object is sequentially conducted to the liquid coolant in the capillary cavity through the phase change container shell and the capillary cavity of the porous plate, so that the temperature of the liquid coolant reaches the boiling point and a liquid-gas phase change occurs. The heat conducted by the temperature control object is absorbed by the latent heat of the phase change, thereby realizing the temperature control of the temperature control object. The present invention adopts a liquid separator, a liquid separation pipeline, a plurality of small circular through holes on the liquid separation tube, a circular groove prefabricated on the porous plate, and a porous plate mechanism and structure, and utilizes the capillary action of the capillary cavity uniformly distributed on the porous plate to realize uniform adsorption of the liquid coolant and have a cooling and temperature control function. It is a liquid-gas phase change cold plate with a simple structure, high refrigerant utilization efficiency, and a controllable liquid-gas phase change process. The present invention can be applied to the temperature control of electrical equipment in various aircraft cabins, and can also be applied to the temperature control of high heat flux density equipment such as energy storage batteries and chips.

[0013] The present invention discloses a liquid-gas phase change cold plate with multi-channel liquid supply, which is composed of three parts, namely, a liquid distributor, which includes a liquid distributor port, a joint and a plurality of symmetrically arranged liquid outlet joints; a liquid distributor pipeline, which includes a symmetrical multi-channel liquid distributor pipe, one end of which is connected to the liquid distributor outlet joint, and the other end is connected to the phase change container liquid inlet joint, the liquid distributor pipe extends into a circular groove prefabricated in a porous plate through the phase change container liquid inlet joint, the liquid distributor pipe extends into the inner part of the circular groove prefabricated in the porous plate, and a plurality of symmetrical small circular passages facing the surface of the circular groove prefabricated in the porous plate are evenly distributed on the pipe wall along the pipe axis direction. The coolant flowing in the liquid dispensing pipeline flows out from a plurality of small circular through holes on the liquid dispensing tube and then enters the circular groove prefabricated in the porous plate; the porous plate comprises a porous plate and a circular groove prefabricated in the porous plate, the porous plate is in close contact with the phase change container, and there are uniformly distributed capillary cavities on the porous plate. Under the action of capillary force, the coolant entering the circular groove prefabricated in the porous plate is adsorbed into the inside of the porous plate, thereby realizing the storage and management of the coolant liquid; the phase change container comprises a phase change container shell and a phase change container liquid inlet joint, and the phase change container shell is in close contact with the temperature control object to reduce the contact thermal resistance.

[0014] The coolant from the external circuit is diverted into the liquid separation pipeline through the liquid separator. One end of the liquid separation pipeline is connected to the liquid separator, and the other end is connected to the phase change container. The coolant flows in the liquid separation pipeline. The liquid separation tube extends into the phase change container, and a plurality of symmetrical small circular through holes facing the surface of the circular groove prefabricated on the porous plate are evenly distributed on the tube wall along the tube axis direction. The liquid separation pipeline is arranged in the circular groove prefabricated on the porous plate. The coolant flowing in the liquid separation pipeline flows out from the plurality of circular through holes on the liquid separation tube and immediately enters the circular groove prefabricated on the porous plate. There are evenly distributed capillary cavities on the porous plate. Under the action of capillary force, the coolant entering the circular groove prefabricated on the porous plate is adsorbed into the inside of the porous plate, thereby realizing the storage management of the coolant liquid. The porous plate and the phase change container, as well as the phase change container shell and the temperature-controlled object are in close contact to reduce contact thermal resistance. The heat generated by the temperature-controlled object is transferred to the liquid coolant in the capillary cavity through the phase change container shell and the capillary cavity of the porous plate in turn, so that the temperature of the liquid coolant reaches the boiling point, thereby causing a liquid-gas phase change. The heat transferred from the temperature-controlled object is absorbed through the latent heat of phase change, thereby achieving temperature control of the temperature-controlled object.

[0015] The advantages of the present invention compared with the prior art are:

[0016] The present invention uniformly transports the coolant to the porous plate by liquid separation and small flow rate dispersed liquid supply, and stores the coolant in the porous plate in liquid form through the capillary cavities uniformly distributed on the porous plate. When the heat of the temperature control object is transferred to the liquid coolant in the porous plate through the phase change container wall, the coolant heats up and gasifies, and the bubbles break through the capillary cavity liquid surface tension, thereby initiating a continuous liquid-gas phase change endothermic process, controlling the intensity of the liquid-gas phase change process, and achieving stable and continuous cooling of the temperature control object. It can be applied to the temperature control of high heat flux density equipment such as energy storage batteries and chips, and can also be applied to the fields of ground electronic equipment temperature control and aircraft cabin equipment temperature control. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of a liquid-gas phase change cold plate with multiple liquid supply paths of the present invention;

[0018] Figure 2 Schematic diagram of the internal structure of the dispenser;

[0019] Figure 3 Schematic diagram of the circular groove prefabricated on the perforated plate;

[0020] Figure 4 Schematic diagram of small circular through holes prefabricated on the surface of circular grooves of a porous plate;

[0021] Figure 5 is a schematic diagram of a phase change container;

[0022] Among them, 1-liquid distributor, 2-liquid distribution pipeline, 3-porous plate, 4-phase change container, 5-liquid distribution port, 6-liquid inlet, 7-liquid outlet joint, 8-liquid distribution tube, 9-phase change container liquid inlet joint, 10-circular groove, 11-small circular through hole, 12-phase change container shell. DETAILED DESCRIPTION

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] like Figure 1-5 As shown, it is a structural diagram of the present invention, which consists of a liquid-gas phase change cold plate with multi-way liquid supply, characterized in that it consists of a liquid distributor 1, a liquid distribution pipeline 2, a porous plate 3 and a phase change container 4.

[0025] A liquid-gas phase change cold plate with multi-way liquid supply consists of three parts, namely a liquid distributor 1, which includes a liquid distributor port 5, a liquid inlet 6 and a plurality of symmetrically arranged liquid outlet joints 7; a liquid distributor pipeline 2, which includes a symmetrical multi-way liquid distributor 8, one end of the liquid distributor 8 is connected to the liquid distributor outlet joint 7, and the other end is connected to the phase change container 4 liquid inlet joint 9, the liquid distributor 8 extends into the prefabricated circular groove 10 of the porous plate 3 through the phase change container liquid inlet joint 9, the liquid distributor extends into the prefabricated circular groove 10 of the porous plate, and a plurality of symmetrical small circular through holes 11 facing the surface of the prefabricated circular groove of the porous plate are evenly distributed on the tube wall along the tube axis direction, and the liquid distributor pipe 8 is connected to the prefabricated circular groove of the porous plate 3 through the phase change container liquid inlet joint 9. The coolant flowing in the circuit flows out from a plurality of small circular through holes on the liquid dispensing tube, and then enters the circular groove 10 prefabricated on the porous plate 3; the porous plate 3 includes a porous plate 3 and a circular groove 10 prefabricated on the porous plate, the porous plate 3 is in close contact with the phase change container 4, and there are uniformly distributed capillary cavities on the porous plate 3. Under the action of capillary force, the coolant entering the circular groove 10 prefabricated on the porous plate 3 is adsorbed into the inside of the porous plate 3, thereby realizing the storage management of the coolant liquid; the phase change container 4 includes a phase change container shell 12 and a phase change container liquid inlet connector 9. The phase change container shell 12 is in close contact with the temperature control object to reduce the contact thermal resistance.

[0026] The coolant from the external circuit is diverted through the liquid separator 1 and enters the liquid separation pipeline 2. One end of the liquid separation pipeline 2 is connected through the outlet joint 7 of the liquid separator 1, and the other end is connected to the liquid inlet joint 9 of the phase change container 4. The coolant flows in the liquid separation pipeline 2, and a plurality of symmetrical small circular through holes 11 facing the surface of the prefabricated circular groove 10 of the porous plate are evenly distributed on the tube wall along the tube axis direction. The liquid separation pipeline 2 is arranged in the prefabricated circular groove 10 of the porous plate 3. The coolant flowing in the liquid separation pipeline 2 flows out from the plurality of small circular through holes 11 on the liquid separation pipe 8 and immediately enters the prefabricated circular groove 10 of the porous plate 3. There are evenly distributed capillary cavities on the porous plate 3. Under the action of capillary force, the coolant entering the prefabricated circular groove 10 of the porous plate 3 is adsorbed into the inside of the porous plate 3, thereby realizing the storage management of the coolant liquid. The porous plate 3 and the phase change container 4, as well as the phase change container shell 12 and the temperature-controlled object are in close contact to reduce the contact thermal resistance. The heat generated by the temperature-controlled object is sequentially conducted to the liquid coolant in the capillary cavity through the phase change container shell 12 and the capillary cavity of the porous plate 3, so that the temperature of the liquid coolant reaches the boiling point, thereby causing a liquid-gas phase change. The heat conducted from the temperature-controlled object is absorbed through the latent heat of phase change, thereby achieving temperature control of the temperature-controlled object.

[0027] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A liquid-gas phase change cold plate with multiple liquid supply paths, characterized in that: The liquid-gas phase change cold plate comprises a liquid separator (1), a liquid separation pipeline (2), a porous plate (3) and a phase change container (4); The liquid distributor (1) comprises a liquid distribution port (5), a liquid inlet (6) and a plurality of symmetrically arranged liquid distributor outlet joints (7) for achieving uniform distribution of the coolant liquid; The liquid dispensing pipeline (2) comprises a symmetrical multi-channel liquid dispensing tube (8), one end of the liquid dispensing tube (8) is connected to a liquid outlet joint (7) of the liquid dispenser (1), and the other end of the liquid dispensing tube (8) is connected to a liquid inlet joint (9) of a phase change container, and the liquid dispensing tube (8) extends through the liquid inlet joint (9) of the phase change container into a prefabricated circular groove (10) of the porous plate (3).

2. The liquid-gas phase cold plate with multiple liquid supply paths according to claim 1, characterized in that: The liquid dispensing tube (8) extends into the inner part of the circular groove (10) prefabricated on the porous plate (3), and a plurality of symmetrical small circular through holes (11) facing the surface of the circular groove prefabricated on the porous plate are evenly distributed on the tube wall along the tube axis direction; The coolant flowing in the liquid dispensing pipeline (2) flows out from a plurality of small circular through holes on the liquid dispensing pipe (8) and then enters the circular groove (10) prefabricated on the porous plate (3); The porous plate (3) is provided with a prefabricated circular groove (10), the porous plate (3) is in close contact with the phase change container (4), and the porous plate (3) is provided with uniformly distributed capillary cavities. Under the action of capillary force, the coolant entering the prefabricated circular groove (10) of the porous plate (3) is adsorbed into the interior of the porous plate (3); The phase change container (4) comprises a phase change container shell (12) and a phase change container liquid inlet joint (9), and the phase change container shell (12) is in close contact with the temperature control object to reduce contact thermal resistance.

3. The liquid-gas phase cold plate with multiple liquid supply paths according to claim 1, characterized in that: An internal thread is processed on the phase change container shell (12), and the phase change container liquid inlet connector (9) is connected to the phase change container shell (12) via the thread and keeps the seal.

4. The liquid-gas phase cold plate with multiple liquid supply paths according to claim 1, characterized in that: The porous plate (3) is a micro-porous plate made by sintering powder, sintering metal fibers or sintering woven wire mesh.

5. The liquid-gas phase cold plate with multiple liquid supply paths according to claim 1, characterized in that: The coolant from the external circuit is divided into the liquid separation pipeline through the liquid separator. One end of the liquid separation pipeline is connected to the liquid separator, and the other end is connected to the phase change container. The coolant flows in the liquid separation pipeline. The liquid separation tube is arranged in the circular groove prefabricated on the porous plate in the inner part of the phase change container. The coolant flows in the liquid separation pipeline. The liquid separation tube is arranged in the circular groove prefabricated on the porous plate in the inner part of the phase change container. The coolant flows in the liquid separation pipeline from the multiple small circular through holes on the liquid separation tube and immediately enters the circular groove prefabricated on the porous plate. There are uniformly distributed capillary cavities on the porous plate. Under the action of capillary force, the coolant entering the circular groove prefabricated on the porous plate is adsorbed into the inside of the porous plate, thereby realizing the storage management of the coolant liquid.

6. The liquid-gas phase cold plate with multiple liquid supply paths according to claim 1, characterized in that: The porous plate and the phase change container, as well as the phase change container shell and the temperature-controlled object are in close contact to reduce contact thermal resistance. The heat generated by the temperature-controlled object is transferred to the liquid coolant in the capillary cavity through the phase change container shell and the capillary cavity of the porous plate in turn, so that the temperature of the liquid coolant reaches the boiling point, thereby causing a liquid-gas phase change. The heat transferred from the temperature-controlled object is absorbed through the latent heat of phase change, thereby achieving temperature control of the temperature-controlled object.

7. The liquid-gas phase cold plate with multiple liquid supply paths according to claim 1, characterized in that: A liquid distributor, a liquid distributor pipeline, a plurality of small circular through holes on the liquid distributor tube, a circular groove prefabricated on a porous plate, and a porous plate mechanism and structure are adopted, and the capillary action of the capillary cavities evenly distributed on the porous plate is utilized to achieve uniform adsorption of the liquid coolant and have a cooling and temperature control function.

8. The application of a liquid-gas phase change cold plate with multiple liquid supply channels according to claim 1, characterized in that: It is used for temperature control of electrical equipment in various aircraft cabins or for temperature control of energy storage batteries and chip high heat flux density equipment.

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