Room temperature barocaloric cooling device using pressure calorie effect

Abstract

The present invention belongs to the field of cooling technology and discloses a room temperature barocaloric cooling device that utilizes pressure heat effect. The cooling device includes a high-precision high-pressure electric injection pump, a barocaloric unit, a heat exchange fluid, a cold end heat exchanger, and a hot end heat exchanger. The operation of the high-precision high-pressure electric injection pump causes the pressurized barocaloric material to undergo pressurized heat release and decompression heat absorption phenomena due to phase change, and the heat exchange fluid flows back and forth between the barocaloric refrigerant to generate heating and cooling. The high-precision high-pressure electric injection pump in the present invention supplies pressure to the barocaloric cooling cycle with a constant pressure output. The pressurization form is liquid pressure, so the defects of uneven mechanical pressure transmission are greatly improved, and the pressurized oil also serves as a heat exchange fluid and is in direct contact with the refrigerant, and the pressure-driven heating and cooling are directly introduced into the hot end heat exchanger and the cold end heat exchanger to complete the circulation, so that the loss of heat is reduced.

Description

[Technical field]

[0001] The present invention relates to the field of refrigeration technology, and more particularly to a room temperature barocaloric refrigeration system utilizing the pressure caloric effect (barocaloric effect). [Background technology]

[0002] In modern society, refrigeration technology has permeated various production technologies and scientific fields, but the common refrigerants used in traditional gas compression technology, chlorofluorocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs), have varying degrees of destructive effects on the ozone layer and are inconsistent with current health concepts such as environmental protection, greenness and energy saving.

[0003] In this regard, the development and research of environmentally friendly cooling technology has become an important research direction for cooling technology innovation. At present, a new type of solid cooling technology is in the research and development stage, and is considered to be one of the most promising cooling methods to replace traditional gas compression due to its advantage of zero global warming potential (GWP). Based on different calorific effects, the principle of solid cooling technology can be classified into magnetocaloric effect, electrocaloric effect, elastocaloric effect, and pressure caloric effect. However, there is a large gap in the performance difference between phase-change solid refrigerants and liquid refrigerants, which is one of the bottlenecks that restrict the application of solid refrigerant technology.

[0004] Barocaloric cooling techniques allow for a wider range of materials to be chosen, and recently scientists have shown that the maximum isothermal entropy change for a plastic crystalline material is 687 Jkg -1 K -1It was discovered that some of them can reach a temperature of 1000°C, which is one order of magnitude higher than that of conventional solid refrigerants. This value is close to that of conventional commercial liquid refrigerants, and it is easy to put into practical use because the driving conditions are easy to realize and the materials are easy to obtain and inexpensive. In this technology, when pressure is applied or released to a plastic crystalline material, the material's phase change causes it to absorb or release heat, and then the cooling or heating of the load is achieved by heat exchange with the load. This process is called the pressure caloric effect (barocaloric effect). The thermodynamic cycle process of the pressure caloric effect is consistent with the reverse Carnot cycle. Based on the development of a substance with a higher isothermal entropy change at room temperature, it is necessary to develop a corresponding cooling device. Summary of the Invention [Problem to be solved by the invention]

[0005] The object of the present invention is to provide a room temperature barocaloric cooling device utilizing the pressure caloric effect. Based on the pressure caloric effect, this cooling device utilizes the characteristics of the barocaloric material, which absorbs heat and increases temperature when pressure is applied, and releases heat and decreases temperature when pressure is released, and uses a high-precision high-pressure injection pump to provide a phase change pressure condition corresponding to the material under room temperature environment, thereby heating or cooling in the system. Then, a fluid medium is used to circulate the entire system, providing heat to the high-temperature heat source end and cooling to the low-temperature load end, thereby completing the cooling cycle. [Means for solving the problem]

[0006] In order to achieve the above objectives, the technical solutions adopted in the present invention are as follows:

[0007] A room temperature barocaloric cooling device utilizing pressure caloric effect, comprising a high-precision high-pressure electric injection pump, a barocaloric unit, a heat exchange fluid, a cold end heat exchanger and a hot end heat exchanger, The barocaloric unit is a cylinder structure with a cylindrical cavity, which is filled with a solid refrigerant. A hot end liquid outlet pipe and a cooling end liquid outlet pipe are attached to the upper part of the side wall of the cylindrical structure, a hot end liquid inlet pipe and a cooling end liquid inlet pipe are attached to the lower part of the side wall, and an oil inlet is provided in the center of the side wall. Among them, the hot end liquid outlet pipe, the cooling end liquid outlet pipe, the hot end liquid inlet pipe and the cooling end liquid inlet pipe are each equipped with a pressure control valve.

[0008] The high-precision high-pressure electric injection pump is used to provide a constant pressure to the barocaloric unit, and the oil injection pipe at the upper end of the injection pump is connected to the oil inlet of the barocaloric unit and used to inject the pressurized oil. In the cavity of the barocaloric unit, the pressurized oil also serves as a heat exchange fluid and comes into direct contact with the solid refrigerant.

[0009] In the hot end heat exchanger, the hot end liquid outlet pipe of the barocaloric unit is connected to the liquid inlet of the hot end heat exchanger, and the liquid outlet of the hot end heat exchanger is connected to the hot end liquid inlet pipe of the barocaloric unit, thereby forming a heat exchange circuit.

[0010] In the cold end heat exchanger, the cold end liquid outlet pipe of the barocaloric unit is connected to the liquid inlet of the cold end heat exchanger, and the liquid outlet of the cold end heat exchanger is connected to the cold end liquid inlet pipe of the barocaloric unit, thereby forming a heat exchange circuit.

[0011] The solid refrigerant is a carborane-based material, NaPF6, KPF6, NaSbF6, KSbF6, the operating temperature is room temperature, the driving pressure is 0.1MPa~400MPa, and the heat exchange fluid is wear-resistant hydraulic oil.

[0012] The barocaloric unit is made of high-pressure resistant stainless steel, the bottom of the cylinder structure is sealed, the top is fitted with a removable upper cavity cover, and the solid refrigerant is filled into the cylindrical cavity. The hot end liquid outlet pipe, the cold end liquid outlet pipe, the hot end liquid inlet pipe, and the cold end liquid inlet pipe of the barocaloric unit are all equipped with sealed filters to prevent the solid refrigerant from moving during the pressurization process, while also preventing the debris generated by the collision between the solid refrigerants from flowing out together with the fluid and clogging the pipeline. The top of the cylinder structure and the upper cavity cover are sealed with rubber rings to prevent the pressurized oil from flowing out of the cylindrical cavity. During the operation of the system, the entire barocaloric unit is fixed on a flat surface.

[0013] A hydraulic pump is also provided in the hot end liquid outlet pipe of the barocaloric unit, so that the heat exchange fluid in the barocaloric unit flows into the hot end heat exchanger by the action of the hydraulic pump, and the heat exchange fluid in the hot end heat exchanger is forced into the barocaloric unit, and this circulation process continues. Also, a hydraulic pump is provided in the cold end outlet pipe of the barocaloric unit, so that the heat exchange fluid in the barocaloric unit flows into the cold end heat exchanger by the action of the hydraulic pump, and the heat exchange fluid in the cold end heat exchanger is forced into the barocaloric unit, and this circulation process continues.

[0014] The cold end heat exchanger includes a cube cavity I and a heat exchange pipeline I in the cube cavity I. The heat exchange pipeline I is arranged in a U-shape and connected to the liquid inlet and liquid outlet of the cold end heat exchanger. Multiple flat plate layers are installed in the cube cavity I (the refrigerant can be placed between the flat plate layers), and the heat exchange pipeline I is arranged in the flat plate layers. A temperature sensor is installed on the top of the cube cavity I, which feeds back the temperature in the cube cavity I to the control system in real time.

[0015] The hot end heat exchanger includes a cube cavity II and a heat exchange pipeline II in the cube cavity II. The heat exchange pipeline II is arranged in a spiral shape and connected to the liquid inlet and liquid outlet of the hot end heat exchanger. The shell of the cube cavity II is designed with a hollow structure to promote the internal heat exchange. A fan is arranged on the top of the cube cavity II to promote the heat exchange with the air by the hot end heat exchanger. A temperature sensor is installed on the top of the cube cavity II sensor to feedback the temperature of the cube cavity II to the control system in real time.

[0016] The electrical control cabinet contains a PLC control module (control system), the pressure control valve and the temperature sensor are electrically connected to the PLC control module, and the electrical control cabinet is used to open and close the pressure control valve and adjust the flow rate. The temperature sensor transmits the temperature information of the heat exchange fluid in the barocaloric unit. Effect of the Invention

[0017] The effects of the present invention are as follows.

[0018] 1. The cooling device of the present invention uses a high-precision, high-pressure electric injection pump to generate the pressure-induced heat release and pressure-induced heat absorption phenomena caused by the phase change of the barocaloric refrigerant, and the heat exchange fluid flows back and forth between the barocaloric refrigerants to exchange heat.

[0019] 2. The high-precision high-pressure electric injection pump of the present invention supplies pressure to the CUBA caloric unit with a constant pressure output. The pressurized form is liquid pressure, which greatly improves the disadvantage of uneven mechanical pressure transmission. The pressurized oil also functions as a heat exchange fluid, directly contacting the refrigerant, and the heat and cold generated by pressure drive are directly introduced into the heat exchanger at the hot end or the cold end, completing the circulation of the system and reducing the heat loss.

[0020] 3. The cooling device of the present invention is installed with an electric control cabinet, a pressure control valve and a temperature sensor. Therefore, the cooling device of the present invention has the advantages of intelligent control and convenient operation. When the heat exchange fluid in the cooling device of the present invention circulates in the pipeline by pressure drive, the temperature sensor and the pressure control valve can send corresponding signals to the electric control cabinet, realize real-time monitoring of temperature and pressure, and control the valve. It opens and closes according to the set program, and uses a high-precision high-pressure electric injection pump to pressurize or depressurize the barocaloric material (refrigerant), thereby causing the phenomenon of pressure caloric effect and realizing the cooling circulation process. [Brief description of the drawings]

[0021] [Figure 1] FIG. 1 is a schematic diagram of the overall structure of a barocaloric cooling device based on the pressure caloric effect of the present invention. [Diagram 2] FIG. 2 is a schematic diagram of a high-precision, high-pressure electric injection pump in the barocaloric cooling device of the present invention. [Diagram 3] FIG. 2 is a schematic diagram of a barocaloric unit in the barocaloric cooling device of the present invention. [Figure 4] FIG. 2 is a schematic diagram of a cooling end heat exchanger in the barocaloric cooling device of the present invention. [Diagram 5] FIG. 2 is a schematic diagram of a hot end heat exchanger in the barocaloric cooling device of the present invention. [Figure 6] FIG. 2 is a schematic diagram of an electrical control panel of the barocaloric cooling device of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] In order to better understand the present invention, the present invention is illustrated by the following examples, which are intended to further illustrate the features and advantages of the present invention and are not intended to limit the scope of the claims.

[0023] The present invention provides a room temperature barocaloric cooling device that utilizes the pressure caloric effect. As shown in Figure 1, the barocaloric cooling device is composed of a high-precision high-pressure electric injection pump 1, a barocaloric unit 2, a heat exchange fluid, a cold end heat exchanger 3, and a hot end heat exchanger 4, and the structure of each part is as follows:

[0024] As shown in Figure 2, a high-precision high-pressure electric injection pump (Beijing Yijie Material Technology Co., Ltd., HP350A) can be used to pressurize the barocaloric unit 2 at a constant pressure. The oil injection pipe 101 at the upper end of the electric injection pump 1 is connected to the oil inlet 205 of the barocaloric unit, and pressurized oil is injected into the cavity of the barocaloric unit.

[0025] As shown in Figure 3, the barocaloric unit is a cylindrical structure with a cylindrical cavity 202, the cavity is filled with solid refrigerant, and the upper part of the side wall of the cylindrical structure is provided with a hot end liquid outlet pipe 207 and a cold end liquid outlet pipe 203. The lower part of the side wall of the cylindrical structure is provided with a hot end liquid inlet pipe 206 and a cold end liquid inlet pipe 204. The center of the side wall is provided with an oil inlet 205, and the pressurizing oil injected from the oil inlet simultaneously serves as a heat exchange fluid and directly contacts the solid refrigerant. The hot end liquid outlet pipe, the cold end liquid outlet pipe, the hot end liquid inlet pipe and the cold end liquid inlet pipe are all equipped with a pressure control valve 6 to control the switching of fluids and adjust the flow of fluids. The barocaloric unit is made of high pressure resistant stainless steel, the bottom of the cylinder structure is sealed, and the top is equipped with a removable upper cavity bar cover 201, and a rubber ring is used to seal the top of the cylinder structure and the upper cavity cover 201 to prevent the pressurized oil from flowing out of the cylindrical cavity 202.

[0026] The hot end liquid outlet pipe, the cold end liquid outlet pipe, the hot end liquid inlet pipe, and the cold end liquid inlet pipe of the barocaloric unit are all equipped with sealed filters to prevent the solid refrigerant from moving during the pressurization process, and also to prevent debris generated by the collision between the solid refrigerants from flowing out together with the fluid and clogging the pipeline. During the operation of the system, the entire barocaloric unit is fixed on a horizontal surface. A hydraulic pump is installed in the hot end liquid outlet pipe of the barocaloric unit, and the heat exchange fluid in the barocaloric unit flows into the hot end heat exchanger through the operation of the hydraulic pump, and the heat exchange fluid in the hot end heat exchanger is pushed into the barocaloric unit, so that this circulation process is continued. A hydraulic pump is also installed in the cold end liquid outlet pipe of the barocaloric unit, and the heat exchange fluid in the barocaloric unit flows to the cold end through the operation of the hydraulic pump, and the heat exchange fluid in the cold end heat exchanger is pushed into the barocaloric unit, so that this circulation process is continued.

[0027] As shown in FIG. 4, the cooling end heat exchanger 3 includes a cubic cavity I 304 and a heat exchange pipeline I 302 in the cavity I. The heat exchange pipeline I 302 is arranged in a U-shape and is connected to the liquid inlet 303 of the cooling end heat exchanger and the liquid outlet 301 of the cooling end heat exchanger, respectively. The cooling end heat exchanger liquid inlet 303 and the cooling end heat exchanger liquid outlet 301 are respectively connected to the cooling end liquid outlet pipe and the cooling end liquid inlet pipe of the barocaloric unit, forming a heat exchange circuit. There are multiple flat plate layers (cooling items can be placed on the flat plate layers) in the cavity I, and the heat exchange pipe I is arranged between the flat plate layers. A temperature sensor 7 is installed on the top of the cubic cavity I, which feeds back the temperature in the cavity I to the control system in real time.

[0028] As shown in FIG. 5, the hot end heat exchanger 4 includes a cubic cavity II 401 and a heat exchange pipeline II 402 in the cavity II. The heat exchange pipeline II is arranged in a spiral shape and connected to the liquid inlet and liquid outlet of the hot end heat exchanger, respectively, and the liquid inlet and liquid outlet are connected to the hot end liquid outlet pipe and the hot end liquid inlet pipe of the barocaloric unit, respectively, thereby forming a heat exchange circuit. The shell of the cavity II is designed with a hollow structure to promote the internal heat exchange, and a fan 403 is installed on the top of the cavity II to ensure that the hot end heat exchanger can fully exchange heat with the air. A temperature sensor is installed on the top of the cavity II to monitor the temperature of the cavity II in real time and feed back to the control system.

[0029] The normal temperature barocaloric cooling equipment of the present invention also includes an electric control cabinet 5. The electric control cabinet 5 includes a PLC control module (control system), and the pressure control valve 6 and the temperature sensor 7 are electrically connected to the PLC control module. The electric control cabinet is used to control the opening and closing and flow rate adjustment of the pressure control valve, and at the same time, can monitor the temperature information of the heat exchange fluid in the barocaloric unit transmitted by the temperature sensor in real time.

[0030] The solid refrigerant in the present invention is a material that can obtain a cooling effect by utilizing the pressure-calorie effect under normal temperature conditions, for example, carborane-based materials, NaPF6, KPF6, NaSbF6, KSbF6, etc. are preferentially selected, the operating temperature is room temperature, the applied driving pressure is 0.1 MPa to 400 MPa, and the heat exchange fluid is wear-resistant hydraulic oil.

[0031] The working process of the barocaloric cooling device of the present invention is as follows.

[0032] The driving pressure value of the high-precision high-pressure injection pump 1 is set according to the driving pressure and cooling range of the solid refrigerant used under normal temperature conditions. The oil injection pipe 11 at the top of the high-precision high-pressure injection pump 1 sends the room temperature heat exchange fluid under pressure to the barocaloric unit 2, the hot end heat exchanger 3 and the cold end heat exchanger 4, so that all the refrigerant in the barocaloric unit is covered by the heat exchange fluid.

[0033] When starting the circulation, first close the pressure control valve between the barocaloric unit 2 and the hot end heat exchanger 3 and the cold end heat exchanger 4, and use the high-precision high-pressure injection pump to pressurize the refrigerant in the barocaloric unit 2 until it reaches the phase change pressure, which causes a phase change of the barocaloric material and increases the temperature, and the heat exchange fluid in the barocaloric unit 2 exchanges heat with the refrigerant and increases the temperature. After the heat exchange is completed, the fluid temperature of the entire cavity rises to the same level, and then open the pressure control valve 6 between the barocaloric unit 2 and the hot end heat exchanger 3, and activate the liquid pump connected between the barocaloric unit 2 and the hot end heat exchanger 3. The high-temperature fluid in the barocaloric unit 2 flows into the hot end heat exchanger 3 under the action of the pump, and exchanges heat with the external environment under the action of the upper fan. Then the normal temperature fluid in the hot end heat exchanger 3 is forced into the barocaloric unit 2. This circulation process continues until the fluid temperature in the two chambers becomes constant and returns to room temperature.

[0034] At this time, the pressure control valve between the barocaloric unit 2 and the hot end heat exchanger 3 is closed, and the pressure in the barocaloric unit 2 is reduced to normal pressure by the high-precision high-pressure injection pump 1. After the pressure is released, the barocaloric unit absorbs heat and the temperature drops. When the heat exchange is completed and the fluid temperature in the entire cavity drops to a certain temperature, the pressure control valve connected between the barocaloric unit 2 and the cold end heat exchanger is opened, and the liquid pump connected between the barocaloric unit 2 and the cold end heat exchanger 4 is operated, so that the low-temperature fluid in the barocaloric unit 2 flows into the cold end heat exchanger 4, and the cold energy is transferred to the load (the item placed on the flat plate layer), while the normal temperature fluid in the cold end heat exchanger 4 flows into the barocaloric unit 2, and this circulation process continues until the temperature at both ends returns to the ambient temperature. The heat exchange cycles at the left and right ends are performed continuously and alternately, and the temperature of the cold end load can be continuously reduced until it reaches the scheduled cooling temperature. [Explanation of symbols]

[0035] 1- electric injection pump, 101 - oil injection pipe, 2- Barocaloric unit, 201-Upper cavity cover, 202 - cylindrical cavity, 203-cooling end liquid outlet pipe, 204-cooling end liquid inlet pipe, 205-Oil inlet, 206-Hot end liquid inlet pipe, 207-Hot end liquid outlet pipe, 3-Cold end heat exchanger, 301-cooling end heat exchanger liquid outlet, 302 - Heat exchange pipeline I, 303 - cold end heat exchanger liquid inlet, 304 - Cavity I, 4-hot end heat exchanger, 401-Cavity II, 402 - Heat exchange pipeline II, 403-Fan, 5-Electrical control cabinet, 6-pressure control valve, 7-Temperature sensor.

Claims

1. A room temperature barocaloric cooling device utilizing the pressure caloric effect, comprising a high-precision high-pressure electric injection pump, a barocaloric unit, a heat exchange fluid, a cold end heat exchanger and a hot end heat exchanger; The barocaloric unit has a cylindrical structure with a cylindrical cavity, the cavity is filled with a solid refrigerant, a hot end liquid outlet pipe and a cooling end liquid outlet pipe are attached to the upper part of the side wall of the cylindrical structure, a hot end liquid inlet pipe and a cooling end liquid inlet pipe are provided at the lower part of the side wall, and an oil inlet is provided at the center of the side wall, and the hot end liquid outlet pipe, the cooling end liquid outlet pipe, the hot end liquid inlet pipe and the cooling end liquid inlet pipe are all equipped with pressure control valves, The high-precision high-pressure electric injection pump provides a constant pressure for the barocaloric unit, and the oil injection pipe at the upper end of the high-precision high-pressure electric injection pump is connected to the oil inlet of the barocaloric unit and is used to inject pressurized oil, and in the cavity of the barocaloric unit, the pressurized oil also serves as a heat exchange fluid and is in direct contact with the solid refrigerant; In the hot end heat exchanger, the hot end liquid outlet pipe of the barocaloric unit is connected to the liquid inlet of the hot end heat exchanger, and the liquid outlet of the hot end heat exchanger is connected to the hot end liquid inlet pipe of the barocaloric unit, thereby forming a heat exchange circuit; In the cooling end heat exchanger, a cooling end liquid outlet pipe of the barocaloric unit is connected to a liquid inlet of the cooling end heat exchanger, and a liquid outlet of the cooling end heat exchanger is connected to a cooling end liquid inlet pipe of the barocaloric unit, thereby forming a heat exchange circuit.

2. The solid refrigerant is a carborane-based material, NaPF ６ , K.P.F. ６ , NaSbF ６ or KSbF ６ The room temperature barocaloric cooling device utilizing the pressure calorie effect according to claim 1, wherein the operating temperature of the solid refrigerant is room temperature, and the applied driving pressure is 0.1 MPa to 400 MPa.

3. The barocaloric unit is made of high pressure resistant stainless steel, the bottom of the cylinder structure is sealed, the top is equipped with a removable upper cavity cover, the cylindrical cavity is filled with solid refrigerant, the hot end liquid outlet pipe, the cold end liquid outlet pipe, the hot end liquid inlet pipe and the cold end liquid inlet pipe of the barocaloric unit are all equipped with sealed filters to prevent the solid refrigerant from moving during the pressurization process, and to prevent the debris generated by the collision between the solid refrigerants from flowing out together with the fluid and clogging the pipeline, the top of the cylinder structure and the upper cavity cover are sealed with a rubber ring to prevent the pressurized oil from flowing out of the cylindrical cavity, and the entire barocaloric unit is fixedly placed on a flat surface during the operation of the system.

4. 2. The room-temperature barocaloric cooling device utilizing the pressure-calorie effect according to claim 1, characterized in that a hydraulic pump is provided in a hot end liquid outlet pipe of the barocaloric unit, the heat exchange fluid in the barocaloric unit flows into the hot end heat exchanger by the action of the hydraulic pump, the heat exchange fluid in the hot end heat exchanger is forced into the barocaloric unit, and this circulation process is continued; and a hydraulic pump is also provided in a cold end liquid outlet pipe of the barocaloric unit, the heat exchange fluid in the barocaloric unit flows into the cold end heat exchanger by the action of the hydraulic pump, the heat exchange fluid in the cold end heat exchanger is forced into the barocaloric unit, and this circulation process is continued.

5. The cold end heat exchanger includes a cubic cavity I and a heat exchange pipeline I in the cubic cavity I; The heat exchange pipeline I is arranged in a U-shape and is connected to the liquid inlet and liquid outlet of the cold end heat exchanger respectively; There are a plurality of flat plate layers in the cubic cavity I, and heat exchange pipelines I are arranged between the flat plate layers; The room temperature barocaloric cooling device using pressure caloric effect according to claim 1, characterized in that a temperature sensor is installed on the upper part of the cubic cavity I, and is used to feed back the temperature inside the cubic cavity I to a control system in real time.

6. The hot end heat exchanger includes a cubic cavity II and a heat exchange pipeline II in the cavity II; The heat exchange pipeline II is arranged in a spiral shape and is connected to the liquid inlet and liquid outlet of the hot end heat exchanger, respectively; The room temperature barocaloric cooling device utilizing pressure-calorie effect according to claim 1, characterized in that the shell of the cubic cavity II is designed with a hollow structure to promote internal heat exchange, a fan is installed on the upper part of the cubic cavity II, and a hot end heat exchanger promotes heat exchange with the air, and a temperature sensor is installed on the upper part of the cubic cavity II, which is used to feed back the temperature of the cubic cavity II to a control system in real time.

7. Further comprising an electrical control panel; The room temperature barocaloric cooling device utilizing the pressure-calorie effect according to claim 5 or 6, characterized in that the electric control panel includes a PLC control module (control system), the pressure control valve and the temperature sensor are electrically connected to the PLC control module, and the electric control panel is used to control the opening and closing of the pressure control valve and the flow rate adjustment, and at the same time, can monitor the temperature information of the heat exchange liquid in the barocaloric unit transmitted from the temperature sensor in real time.

8. 2. The room temperature barocaloric cooling device using pressure-calorie effect according to claim 1, wherein the heat exchange fluid is a wear-resistant hydraulic oil.

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