Heat storage cooling device based on drawer type two-component reaction and using method of heat storage cooling device

Abstract

The invention discloses a heat storage cooling device based on drawer type double-component reaction and a use method thereof, and belongs to the technical field of chemical energy storage and cooling, the device comprises a cooling fin, an isolation layer and a reel, the cooling fin is located at the bottom of the cooling device, the cooling fin is filled with a substance A in the double-component reaction, the isolation layer is located above the cooling fin, and the reel is located above the isolation layer. The filler in the layers of the isolation layer contains a substance B. The isolation layer is pulled open through rotation of the reel, and the substance A and the substance B make contact to generate an endothermic reaction. During use, the upper surface of a heat source is attached to the bottom of the cooling fin, when the temperature is over-high, the reel starts to roll, the isolation layer is pulled open, the substance A makes contact with the substance B, an endothermic reaction occurs, and the heat source is cooled; and when the temperature is not overheated, the reel stops rolling, no new substance A is in contact with the substance B, and an endothermic reaction does not occur. Compared with a traditional cooling method, the technology has higher thermal management efficiency and better environmental adaptability.

Description

Technical Field

[0001] The present invention relates to the field of chemical energy storage and cooling technology, and in particular to a heat storage and cooling device based on a "drawer-type" two-component reaction and a method for using the same. Background Art

[0002] With the rapid development of electronic technology, high heat consumption scenarios have become more and more common, especially in the fields of thermal management such as high-performance electronic equipment, laser weapons, aerospace, and new energy vehicles. The heat dissipation of electronic equipment in these scenarios has become a technical problem that needs to be solved urgently. Heat storage technology has the characteristics of rapid absorption and release of thermal energy, and has great research prospects in solving the problem of thermal energy shock in a high-heat environment. For example, in the thermal management of batteries in new energy vehicles, air or water is used as a heat transfer cooling medium to consume the heat dissipated by the battery. Due to the low heat transfer efficiency of air, when liquid water is used as a medium, the system design structure is complex and the cost is too high, which makes it difficult to meet current needs. If this heat cannot be effectively controlled and dissipated, it will cause the equipment to overheat, affect the operating stability and service life of the equipment, and even cause damage to the equipment. Therefore, the development of an efficient heat dissipation technology is crucial to ensure the normal operation of electronic equipment and extend its service life.

[0003] With the continuous increase in the demand for heat dissipation of electronic equipment and the complexity of heat dissipation scenarios, heat dissipation technologies based on traditional physical methods have gradually revealed various bottleneck problems. The idea of ​​chemical reaction heat dissipation has emerged. Its most notable feature is its high energy storage density. At the same time, different chemical reactions can be selected according to different heat dissipation environment conditions, thereby achieving a wider temperature range. In addition, endothermic reactions between different phases can achieve composite storage of cold and heat, and have theoretically infinite heat storage cycles and transportation distances, with less heat loss. The series of advantages of chemical endothermic reaction energy storage make it a research hotspot in the current field of endothermic energy consumption.

[0004] Heat dissipation technology based on chemical reactions is becoming an important research direction in the field of heat dissipation technology for electronic equipment. However, the primary problem faced in heat dissipation of chemical reactions is how to trigger the reaction according to external environmental conditions and control the reaction process. Secondly, for multi-component chemical reactions, it is still difficult to fuse the mixed multi-components with the cooling plate to achieve the effect of a composite structure, thereby realizing the cooling of the heat source. For this reason, it has been proposed to use a stirring method to place component A and component B of the chemical reaction in a cooling device and mix them together by stirring. This design method brings about system complexity and operational instability, etc., and is also not conducive to the miniaturization of the reaction system, especially under environmental conditions with limited space.

[0005] As an efficient thermal management strategy, two-component chemical reaction cooling technology utilizes the heat absorption characteristics of chemical reactions generated when two or more chemical substances are mixed to achieve the purpose of absorbing and storing thermal energy. This technology can absorb a large amount of heat during the chemical reaction process, cool the heat source in real time, and convert the absorbed heat into potential chemical energy for storage. When needed, this heat energy is released through controlled chemical reactions to achieve the purpose of temperature regulation. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a new cooling method, specifically a chemical cooling device and method using a "drawer-type" two-component reaction system to solve the heat dissipation problem in high-performance electronic equipment. It is mainly used in electronic equipment that generates a large amount of heat and cannot dissipate waste heat by itself. It aims to solve the heat dissipation problem in electronic equipment systems with high energy consumption and high heat generation through a simple, reliable and easy-to-implement method, and reduce irreparable damage to electronic equipment caused by overheating.

[0007] The technical solution of the present invention is as follows: a heat storage cooling device based on a "drawer-type" two-component reaction, the cooling device comprising a heat sink, an isolation layer, and a scroll, the heat sink is located at the bottom of the cooling device, the heat sink is filled with substance A in the two-component reaction, the isolation layer is above the heat sink, the filler in the layer of the isolation layer contains substance B, the isolation layer is pulled apart by rotating the scroll, and substance A and substance B come into contact to produce an endothermic reaction.

[0008] Furthermore, the isolation layer is composed of several layers, which are stacked layer by layer on the heat sink.

[0009] Furthermore, the isolation layer is layered with B substance and A substance filled in turn from bottom to top.

[0010] Furthermore, the substance A and the substance B are selected from component one or component two respectively, the component one comprises barium hydroxide octahydrate or calcium hydroxide, and the component two comprises ammonium thiocyanate or ammonium chloride.

[0011] Furthermore, the substance A is sodium bicarbonate, and the substance B contains acetic acid or citric acid solution.

[0012] Furthermore, the cooling device comprises a container, the heat sink is at the bottom of the container, a cover plate is provided above the container, and sealing gaskets are provided between the container and the cover plate, and between the container and the heat sink.

[0013] Furthermore, the container material is selected from graphite, copper, aluminum, titanium, silver, gold and alloys thereof, and the isolation layer is a polytetrafluoroethylene film.

[0014] Furthermore, the cooling device also includes a temperature control system, which includes a temperature sensor and an intermediate relay, and the intermediate relay controls the rotation of the reel according to a signal from the temperature sensor.

[0015] The present invention also provides a method for using a heat storage cooling device based on a "drawer-type" two-component reaction. Using any one of the aforementioned cooling devices, the upper surface of the heat source is attached to the bottom of the heat sink. When the temperature is over-temperature, the reel starts to roll, pulling open the isolation layer so that substance A contacts substance B, an endothermic reaction occurs, and the heat source is cooled. When the temperature is not over-temperature, the reel stops rolling, no new substance A contacts substance B, and no endothermic reaction occurs.

[0016] Furthermore, the substance A on the isolation layer supplements the substance A on the heat sink.

[0017] Compared with the prior art, the technical solution of the present invention has the following beneficial effects: (1) The present invention adopts chemical energy storage and cooling technology, which is more energy efficient and less dependent on the environment than traditional heat dissipation methods such as physical methods, such as cooling systems based on water or air. It has stable performance under extreme conditions and can meet the current heat dissipation needs of highly integrated electronic equipment. (2) This technology relies on chemical energy for cooling, which reduces the impact on the environment as the world pays more attention to energy conservation and emission reduction. (3) The high heat storage cooling device based on a multi-layer "drawer-type" two-component reaction of the present invention cleverly uses isolation layers and scrolls to facilitate the control of the reaction, maintain the stability of the reaction, and can easily achieve temperature control. In addition, it can continue to work within a certain period of time instead of being used once. (4) The present invention can not only select a specific two-component reaction system, but also achieve efficient heat absorption through the endothermic reaction of the system. In addition, the A substance can be selected from a phase change endothermic substance. For a single-component phase change endothermic reaction, the heat source can also be dissipated in the reaction device. In this process, firstly, the heat absorption of the phase change of the material can be used to dissipate heat. If the need cannot be met, the autonomous feedback machine can pull the reel to involve the B substance in the reaction, and the system can be adaptively adjusted according to the change of the external temperature to start the two-component reaction. Compared with the traditional cooling method, this route has higher thermal management efficiency and better environmental adaptability. (5) The cooling device and method of the present invention can easily realize the start-up and control of the reaction system. The experimental results show that the use of the method of the present invention can greatly improve the cooling effect of high heat flux density electronic equipment, and at the same time, the thermal energy absorption efficiency is also greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the invented device; Figure 2 It is a schematic diagram of the scroll; Figure 3 It is a schematic diagram of installing the device with a heat dissipation chip.

[0019] Among them, 1 is a heat sink, 2 is an isolation layer, 3 is a reel, 4 is substance A, 5 is substance B, 6 is a cover plate, 7 is a temperature control system, 8 is a temperature sensor, and 9 is an intermediate relay. DETAILED DESCRIPTION

[0020] The technical solution of the present invention is further explained below in conjunction with the accompanying drawings. Example 1

[0021] like Figure 1 As shown, a heat storage cooling device based on a "drawer-type" two-component reaction includes a heat sink 1, an isolation layer 2, and a reel 3. The heat sink 1 is located at the bottom of the cooling device. The heat sink 1 is filled with substance A 4 in the two-component reaction. The isolation layer 2 is above the heat sink 1. The filler in the layer of the isolation layer 2 includes substance B 5. The isolation layer 2 is pulled apart by rotating the reel 3, and the substance A 4 and substance B 5 come into contact to generate an endothermic reaction. The reel 3 is as shown in FIG. Figure 2 shown.

[0022] The substance A 4 and substance B 5 are selected from component one or component two, respectively, the component one comprises barium hydroxide octahydrate or calcium hydroxide, and the component two comprises ammonium thiocyanate or ammonium chloride. Specifically, as long as the substance A is selected from barium hydroxide octahydrate or calcium hydroxide or a mixture thereof, the substance B is selected from ammonium thiocyanate or ammonium chloride or a mixture thereof. Conversely, the substance A can be selected from ammonium thiocyanate or ammonium chloride or a mixture thereof, and the substance B can be selected from barium hydroxide octahydrate or calcium hydroxide or a mixture thereof. Example 2

[0023] A heat storage cooling device based on a "drawer-type" two-component reaction, the cooling device comprises a heat sink 1, an isolation layer 2, and a reel 3. The heat sink 1 is located at the bottom of the cooling device. The heat sink 1 is filled with substance A 4 in the two-component reaction. The isolation layer 2 is above the heat sink 1. The filler in the layer of the isolation layer 2 includes substance B 5. The isolation layer 2 is pulled apart by rotating the reel 3, and the substance A 4 and substance B 5 come into contact to generate an endothermic reaction. The reel 3 is as shown in FIG. Figure 2 shown.

[0024] The isolation layer 2 is composed of several layers, which are stacked layer by layer on the heat sink 1. The isolation layer 2 is filled with B material 5 and A material 4 in turn from bottom to top.

[0025] The substance A 4 is sodium bicarbonate, and the substance B 5 comprises acetic acid or citric acid solution or a mixture thereof.

[0026] The cooling device includes a container, the heat sink 1 is at the bottom of the container, and there is a cover plate 6 above the container. There are sealing gaskets between the container and the cover plate 6, and between the container and the heat sink 1. The top of the container is a cover plate 6 to ensure that the system is in a closed system to prevent the reaction from leaking out; the bottom is tightly fitted with the equipment required for heat dissipation, so that the heat source can evenly conduct heat out. The cooling device consists of a container part, a heat sink 1 and a cover plate 6. The material of the container part is a high thermal conductivity material, mainly but not limited to graphite, copper, aluminum, titanium, silver, gold and other metals and their alloys. The structure of the container part can be designed as a cuboid, a cube and a cylinder, and can be designed into a shape adapted to the environment according to the scene requirements. Several heat sinks 1 are embedded in the container, and the gaps between the heat sinks 1 are filled with substance A for the two-component reaction. Fill the separation layer controlled by the scroll 3 with substance B, and this part is a reaction system for the two-component reaction.

[0027] The container material is selected from graphite, copper, aluminum, titanium, silver, gold and alloys thereof, and the isolation layer 2 is a polytetrafluoroethylene film. Example 3

[0028] The difference from Example 1 and Example 2 is that the cooling device further includes a temperature control system 7, and the temperature control system 7 includes a temperature sensor 8 and an intermediate relay 9, and the intermediate relay 9 controls the rotation of the reel 3 according to the signal of the temperature sensor 8. The temperature of the heat source is monitored by the temperature sensor 8, and the required lowered temperature is set to regulate the reaction system. When a certain set temperature value is reached, the reaction is started, the reel 3 twitches, component A contacts component B, and the heat source is cooled by an endothermic chemical reaction).

[0029] The cooling system of this part uses the temperature feedback from the temperature sensor 8 and the scroll-type separation layer to control the contact between substance A and substance B, thereby realizing the autonomous feedback of the system. Through the endothermic reaction of different components, the heat energy of the high heat generating equipment is dissipated, solving the heat dissipation problem of high heat flux density equipment in specific scenarios restricted by environmental conditions. Example 4

[0030] like Figure 3 As shown, a method for using a heat storage cooling device based on a "drawer-type" two-component reaction is shown. Using the cooling device in the embodiment, the upper surface of the heat source is attached to the bottom of the heat sink 1. When the temperature is over, the reel 3 starts to roll, and the isolation layer 2 is pulled apart so that the substance A 4 contacts the substance B 5, and an endothermic reaction occurs to cool the heat source. When the temperature is not over, the reel 3 stops rolling, and no new substance A 4 contacts the substance B 5, and no endothermic reaction occurs. The substance A 4 on the isolation layer 2 supplements the substance A 4 on the heat sink 1, and an endothermic reaction continues. Example 5

[0031] The overall structure is as follows Figure 1 As shown, it is mainly divided into three parts. The leftmost part is the cooling device, which consists of a container part, a heat sink 1, and a reel 3 (as shown in FIG. Figure 2 As shown) and a cover plate 6, with a relay in the middle and a temperature control device on the right. The temperature fed back by the cooling device controls the reel 3 of the cooling device through the relay. When the temperature of the cooling device reaches the set temperature, the temperature sensor 8 receives the signal and controls the relay to perform heat dissipation treatment on it, that is, the reel 3 starts to roll, and in the cooling device, substance A contacts substance B, and an endothermic reaction occurs, thereby achieving heat dissipation treatment of the heat source).

[0032] Example 6 The reaction process of the two-component barium hydroxide octahydrate and ammonium thiocyanate involved in the present invention is as follows: Weigh 60g of barium hydroxide octahydrate and 40g of ammonium thiocyanate, and place them on the heat sink 1 and the interlayer of the reel 3 respectively. According to the reaction characteristics of the two components, adjust the temperature of the heat source. After reacting for 1h, the temperature changes from 0℃ to 75℃, and the heat transfer is measured to be 41kJ. Example 7

[0033] The reaction process of the two-component barium hydroxide octahydrate and ammonium chloride involved in the present invention is as follows: Weigh 60 g of barium hydroxide octahydrate and 40 g of ammonium chloride and place them on the heat sink 1 and the reel interlayer respectively. According to the reaction characteristics of the two components, adjust the temperature of the heat source. After reacting for 1 hour, the temperature changes from 0 ℃ to 80.4 ℃, and the heat transfer is measured to be 40 kJ. Example 8

[0034] The reaction process of the two-component calcium hydroxide and ammonium chloride involved in the present invention is as follows: Weigh 7.4 g of calcium hydroxide and 10.4 g of ammonium chloride and place them on the heat sink 1 and the reel interlayer respectively. According to the reaction characteristics of the two components, when the initial temperature is 20 ℃ and the temperature change range is -25~60 ℃, it can be maintained for 10~15 min, and the transfer heat is measured to be 14 kJ. Example 9

[0035] The reaction process of the two-component sodium bicarbonate and acetic acid involved in the present invention is as follows: Weigh 6g of sodium bicarbonate and 10ml of acetic acid solution and place them on the heat sink 1 and the reel interlayer respectively. According to the reaction characteristics of the two components, adjust the temperature of the heat source and wait for the reaction for 1h. During this process, the lowest temperature can drop to -15℃, and the transfer heat is measured to be 12 kJ. Example 10

[0036] In scenarios with high heat generation such as electronic chips, Figure 2 As shown, the bottom of the cooling plate in the present invention is closely attached to the chip that needs to dissipate heat, and the temperature of the chip is fed back to the temperature controller. When the temperature of the chip exceeds the set value, the temperature control device starts the chemical reaction in the cooling plate, thereby dissipating the heat energy of the chip. The chemical reaction occurs as follows.

[0037] (1)Ba(OH)2·8H2O (s) + 2NH4SCN (s) → Ba(SCN)2 (s) + 10H2O (l) + 2NH3(g), (2)Ba(OH)2·8H2O (s) + 2NH4Cl (s) → BaCl2 (s) + 8H2O (l) + 2NH3 (g) (3)NaHCO3(s) + CH3COOH (aq) → CH3COONa (aq) + H2O (l) + CO2(g) (4)Ca(OH)2(s) + 2NH4Cl (s) → CaCl2(s) + 2NH3(g) + 2H2O (l) (5)H3C6H5O7(aq) + 3NaHCO3(s) → 3CO2(g) + 3H2O (l) + Na3C6H5O7(aq) (6) NH4 HCO3(s) + CH3COOH (aq) → CH3COONH4 (aq) + H2O (l) + CO2(g).

[0038] Other similar two-phase substances that undergo chemical endothermic reactions can all be applied to the present technology and fall within the protection scope of the present invention.

[0039] The system starts the reaction when the heat source needs to be cooled. For substances that can absorb heat through phase change and two-component chemical reaction, the reaction system can be controlled according to the different heat dissipation requirements of the heat source. For example, the heat source can be dissipated through the phase change process of the material. When this requirement cannot be met, the two-component reaction is started according to the feedback system.

Claims

1. A heat storage and cooling device based on a "drawer-type" two-component reaction, characterized in that: The cooling device includes a heat sink, an isolation layer, and a scroll. The heat sink is located at the bottom of the cooling device. The heat sink is filled with substance A in a two-component reaction. The isolation layer is above the heat sink. The filler in the layer of the isolation layer contains substance B. The isolation layer is pulled apart by rotating the scroll, and substance A and substance B come into contact to produce an endothermic reaction.

2. According to claim 1, the heat storage and cooling device based on the "drawer-type" two-component reaction is characterized in that: The isolation layer comprises several layers, which are stacked layer by layer on the heat sink.

3. According to claim 2, the heat storage and cooling device based on the "drawer-type" two-component reaction is characterized in that: The isolation layer is layered with B substance and A substance filled in sequence from bottom to top.

4. According to claim 1, the heat storage and cooling device based on the "drawer-type" two-component reaction is characterized in that: The substance A and the substance B are selected from component one or component two respectively, the component one comprises barium hydroxide octahydrate or calcium hydroxide, and the component two comprises ammonium thiocyanate or ammonium chloride.

5. According to claim 1, the heat storage and cooling device based on the "drawer-type" two-component reaction is characterized in that: The substance A is sodium bicarbonate, and the substance B comprises acetic acid or citric acid solution.

6. According to claim 1, the heat storage and cooling device based on the "drawer-type" two-component reaction is characterized in that: The cooling device comprises a container, the heat sink is at the bottom of the container, a cover plate is arranged above the container, and sealing gaskets are arranged between the container and the cover plate, and between the container and the heat sink.

7. The heat storage and cooling device based on the "drawer-type" two-component reaction according to claim 1 is characterized in that: The container material is selected from graphite, copper, aluminum, titanium, silver, gold and alloys thereof, and the isolation layer is a polytetrafluoroethylene film.

8. The heat storage and cooling device based on the "drawer-type" two-component reaction according to claim 1 is characterized in that: The cooling device also includes a temperature control system, which includes a temperature sensor and an intermediate relay. The intermediate relay controls the rotation of the reel according to a signal from the temperature sensor.

9. A method for using a heat storage cooling device based on a "drawer-type" two-component reaction, characterized in that: Using the cooling device of any one of claims 1 to 9, the upper surface of the heat source is attached to the bottom of the heat sink. When the temperature is over-temperature, the reel starts to roll, and the isolation layer is pulled apart to allow substance A to contact substance B, an endothermic reaction occurs, and the heat source is cooled. When the temperature is not over-temperature, the reel stops rolling, and no new substance A contacts substance B, and no endothermic reaction occurs.

10. According to the method for using the heat storage and cooling device based on the "drawer-type" two-component reaction of claim 9, the substance A on the isolation layer supplements the substance A on the heat sink.

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