Heat exchange system for temperature cycle test of phase change material

Abstract

The utility model provides a heat exchange system for a phase change material temperature cycle test, which comprises a low-temperature thermostatic bath and a high-temperature thermostatic bath, and further comprises a low-temperature refrigeration system, a high-temperature heat supply system and a heat regulation system, and a transfer mechanism transfers a heat conduction container filled with a phase change material to be immersed in the low-temperature thermostatic bath and the high-temperature thermostatic bath in turn; the low-temperature refrigerating system supplies heat to the low-temperature thermostatic bath, the high-temperature heating system supplies heat to the high-temperature thermostatic bath, the heat adjusting system comprises a temperature adjusting water tank and an electric heater, liquid is arranged in the temperature adjusting water tank, the temperature adjusting water tank is provided with a first heat exchanger and a second heat exchanger, and the low-temperature refrigerating system exchanges heat with the temperature adjusting water tank through the first heat exchanger. The high-temperature heat supply system exchanges heat with the temperature adjusting water tank through the second heat exchanger, and the refrigerating and heating problems of the low-temperature tank and the high-temperature tank in the phase-change material temperature cycle experiment are solved.

Description

Technical Field

[0001] The utility model relates to the field of phase change material testing, in particular to a heat exchange system for temperature cycle testing of phase change materials. Background Art

[0002] A phase change material (PCM) is a material that stores or releases a large amount of thermal energy through a phase change process from solid to liquid when the temperature changes. This material has a high energy density during the solidification and melting processes, so it is widely used in cooling and thermal management systems. In order to evaluate the stability and reliability of phase change materials in practical applications, high and low temperature cycle experiments are usually required.

[0003] The high and low temperature cycle experiment tests the stability of the material by repeatedly subjecting it to heating and cooling processes. Specifically, the material is heated from a low-temperature solidified state to above its melting temperature and then cooled below the freezing point. This cycle process usually needs to be carried out thousands of times or even tens of thousands of times to evaluate the performance changes and stability of the material during long-term use.

[0004] Currently, many cooling devices use gas as the cooling medium. These devices usually place the phase change material in a high and low temperature cycle chamber and control the temperature through gas. However, due to the low heat transfer efficiency of gas, especially when the sample quantity is large, each cycle may take one to two hours, resulting in low efficiency. To improve the heat transfer efficiency, some devices adopt liquid cooling technology. The sample is placed in oil after being isolated and packaged, and the high-efficiency heat transfer characteristics of the liquid are used for cooling and heating. Cooling and heating are respectively controlled by two constant temperature baths (a cold constant temperature bath and a hot constant temperature bath). Refer to the phase change material temperature test cycle system with the application number CN202310792465.4, and the sample automatically switches between these two constant temperature baths. Due to the high heat transfer efficiency of the liquid, the time for each cycle is significantly shortened, and it may only take five to six minutes.

[0005] Although liquid cooling devices have significant advantages in heat transfer efficiency, their energy consumption problem still exists. Specifically, these devices need to operate the cold and hot constant temperature baths simultaneously, and each constant temperature bath has an independent refrigeration and heating system, which leads to an increase in overall energy consumption. The refrigeration system needs to discharge the thermal energy in the constant temperature bath to the outside, while the heating system needs to absorb the cold source from the air, convert the low-temperature thermal energy into high-temperature thermal energy through a heat pump, and transport it into the constant temperature bath. This design results in energy waste and repeated consumption. The heat discharged by the cooling system cannot be effectively utilized, and the heating system needs to absorb additional heat from the air. Summary of the Utility Model

[0006] The utility model provides a heat exchange system for temperature cycle testing of phase change materials, which solves the problems of refrigeration and heating of the low-temperature bath and high-temperature bath in the temperature cycle experiment of phase change materials.

[0007] To solve the above technical problems, the technical solution adopted by the present utility model is as follows: A heat exchange system for temperature cycle testing of phase change materials, comprising a low-temperature constant temperature bath and a high-temperature constant temperature bath. A transfer mechanism transports a heat conduction container filled with phase change materials and immerses it alternately into the low-temperature constant temperature bath and the high-temperature constant temperature bath. The system further includes a low-temperature refrigeration system, a high-temperature heating system, and a heat regulation system. The low-temperature refrigeration system refrigerates the low-temperature constant temperature bath, and the high-temperature heating system heats the high-temperature constant temperature bath. The heat regulation system includes a temperature regulation water tank and an electric heater. There is liquid in the temperature regulation water tank. The temperature regulation water tank is provided with a first heat exchanger and a second heat exchanger. The low-temperature refrigeration system exchanges heat with the temperature regulation water tank through the first heat exchanger, and the high-temperature heating system exchanges heat with the temperature regulation water tank through the second heat exchanger.

[0008] In a preferred embodiment, the low-temperature refrigeration system includes a first compressor, a first heat exchanger, a first condenser, a first expansion valve, and a first evaporator connected in sequence. The first evaporator is placed inside the low-temperature constant temperature bath.

[0009] In a preferred embodiment, the high-temperature heating system includes a second compressor, a second condenser, a second expansion valve, a second heat exchanger, and a second evaporator connected in sequence. The second condenser is placed inside the high-temperature constant temperature bath.

[0010] In a preferred embodiment, a medium-temperature bath is further provided between the low-temperature constant temperature bath and the high-temperature constant temperature bath. The heat regulation system includes a third transducer. The third transducer is arranged inside the temperature regulation water tank. A fourth transducer is arranged inside the medium-temperature bath. A circulation pump is also provided. The circulation pump connects the third transducer and the fourth transducer to circulate the liquid between the third transducer and the fourth transducer.

[0011] In a preferred embodiment, the first heat exchanger, the second heat exchanger, and the third transducer are immersed in the liquid inside the temperature regulation water tank.

[0012] In a preferred embodiment, a heat insulation chamber is provided on the outer wall of the temperature regulation water tank. An electric heater is arranged inside the heat insulation chamber. The electric heater is attached to the outer wall of the temperature regulation water tank. Heat conduction fins are provided on the inner wall of the temperature regulation water tank at the position of the electric heater.

[0013] In a preferred embodiment, a plurality of heat conduction rods arranged in rows and columns are provided inside the temperature regulation water tank. One end of the heat conduction rod passes through the temperature regulation water tank to extend out. A cooling fan is further provided outside the temperature regulation water tank. The air outlet of the cooling fan faces the extended heat conduction rod.

[0014] The beneficial effects of the present utility model are as follows: The independent refrigeration system and heating system are combined through a heat regulation system. Heat is transferred from the low-temperature constant temperature bath to the high-temperature constant temperature bath through the overheat regulation system as a bridge. Compared with the external atmosphere, the heat transfer efficiency is greatly improved, realizing the effective utilization of thermal energy, which can greatly improve the overall energy efficiency of the system and reduce energy consumption. The low-temperature refrigeration system exchanges heat with the temperature control water tank through the first heat exchanger, intercepts most of the heat, and transfers the heat to the high-temperature heating system through the second heat exchanger and the temperature control water tank. This process is a natural heat transfer from high temperature to low temperature, without the participation of an evaporator and a condenser, and without additional work to carry heat, reducing heat loss and improving the energy-saving effect. When the phase change material is transferred, it needs to pass through the medium-temperature bath as a transition. The medium in the medium-temperature bath supplements or intercepts part of the heat of the phase change material and the heat conduction container, neutralizes the temperature, not only recovers part of the heat, but also reduces the temperature fluctuations of the low-temperature constant temperature bath and the high-temperature constant temperature bath. Description of the Drawings

[0015] The present utility model will be further described below with reference to the drawings and embodiments.

[0016] Figure 1 It is a front view of the system application equipment.

[0017] Figure 2 It is a rear view of the system application equipment.

[0018] Figure 3 It is an isolated view of the test-related mechanism.

[0019] Figure 4 It is a schematic diagram of the heat exchange system.

[0020] Figure 5 It is a schematic diagram of the low-temperature refrigeration system.

[0021] Figure 6 It is a schematic diagram of the heat regulation system.

[0022] Figure 7 It is a schematic diagram of the high-temperature heating system.

[0023] Figure 8 It is a structural diagram of the interior of the temperature control water tank.

[0024] Figure 9 It is a bottom view of the temperature control water tank.

[0025] In the figure: low-temperature constant temperature bath 1; high-temperature constant temperature bath 2; transfer mechanism 3; heat conduction container 4; medium-temperature bath 5; low-temperature refrigeration system 6; first compressor 601; first heat exchanger 602; first condenser 603; first expansion valve 604; first evaporator 605; high-temperature heat supply system 7; second compressor 701; second heat exchanger 702; second condenser 703; second expansion valve 704; second evaporator 705; heat regulation system 8; temperature regulation water tank 801; third transducer 802; fourth transducer 803; circulation pump 804; electric heater 805; cooling fan 806; heat conduction rod 807; heat conduction fin 808; heat insulation chamber 809; thermocouple 810. Detailed implementation mode

[0026] Example 1:

[0027] As Figures 1-9 In [reference], a heat exchange system for temperature cycle testing of phase change materials includes a low-temperature constant temperature bath 1 and a high-temperature constant temperature bath 2. The transfer mechanism 3 transports the heat conduction container 4 filled with phase change materials and immerses them in the low-temperature constant temperature bath 1 and the high-temperature constant temperature bath 2 in turn. It also includes a low-temperature refrigeration system 6, a high-temperature heat supply system 7 and a heat regulation system 8. The low-temperature refrigeration system 6 refrigerates the low-temperature constant temperature bath 1, and the high-temperature heat supply system 7 supplies heat to the high-temperature constant temperature bath 2. The heat regulation system 8 includes a temperature regulation water tank 801 and an electric heater 805. There is liquid in the temperature regulation water tank 801. The temperature regulation water tank 801 is provided with a first heat exchanger 602 and a second heat exchanger 702. The low-temperature refrigeration system 6 exchanges heat with the temperature regulation water tank 801 through the first heat exchanger 602, and the high-temperature heat supply system 7 exchanges heat with the temperature regulation water tank 801 through the second heat exchanger 702.

[0028] There is heat conduction liquid in the low-temperature constant temperature bath 1 and the high-temperature constant temperature bath 2. The liquid in the temperature regulation water tank 801 is water or other heat conduction media. A bracket is arranged on the inner wall of the temperature regulation water tank 801 and a thermocouple 810 is installed. The thermocouple 810 is immersed in the liquid to monitor the temperature, and is externally connected to a temperature display and is also connected to the control system.

[0029] In a preferred solution, the low-temperature refrigeration system 6 includes a first compressor 601, a first heat exchanger 602, a first condenser 603, a first expansion valve 604 and a first evaporator 605 connected in sequence. The first evaporator 605 is placed in the low-temperature constant temperature bath 1.

[0030] The first compressor 601, the first heat exchanger 602, the first condenser 603, the first expansion valve 604, and the first evaporator 605 are connected through pipelines. There is a refrigerant in the pipelines. The tube structure with concentrated arrangement of the first evaporator 605 is placed in the liquid in the low-temperature constant temperature bath 1. The refrigerant in the pipelines absorbs the heat at the low-temperature constant temperature bath 1. Subsequently, the low-temperature and low-pressure refrigerant gas is inhaled by the first compressor 601 and compressed into a high-temperature and high-pressure gas. The first heat exchanger 602 is a tube structure with concentrated arrangement for heat exchange. The high-temperature and high-pressure gas releases part of its heat to the temperature control water tank 801 at the first heat exchanger 602. The remaining heat is carried by the refrigerant to the first condenser 603 and condensed into a liquid state. When the high-pressure liquid refrigerant passes through the first expansion valve 604, the pressure drops suddenly and it becomes a mixture of low-temperature and low-pressure liquid and gas, and then flows back to the first evaporator 605 to absorb heat and be converted into a gas state.

[0031] In a preferred solution, the high-temperature heat supply system 7 includes a second compressor 701, a second condenser 703, a second expansion valve 704, a second heat exchanger 702, and a second evaporator 705 that are connected in sequence. The second condenser 703 is placed in the high-temperature constant temperature bath 2.

[0032] The second compressor 701, the second condenser 703, the second expansion valve 704, the second heat exchanger 702, and the second evaporator 705 are connected through the same pipeline. There is a refrigerant in the pipeline. The second evaporator 705 absorbs heat from the outside, causing the refrigerant to be converted from a gas-liquid mixed state to a gas state. The low-temperature and low-pressure refrigerant at the second compressor 701 is compressed into a high-temperature and high-pressure gas. The tube structure with concentrated arrangement of the second condenser 703 is placed in the liquid in the high-temperature constant temperature bath 2. When the high-temperature and high-pressure gas passes through the high-temperature constant temperature bath 2, it releases heat to the liquid in the high-temperature constant temperature bath 2. Subsequently, when the high-pressure liquid refrigerant passes through the second expansion valve 704, the pressure drops suddenly and it becomes a mixture of low-temperature and low-pressure liquid and gas. The second heat exchanger 702 is a tube structure with concentrated arrangement for heat exchange. When the refrigerant flows through the second heat exchanger 702, the temperature control water tank 801 releases part of its heat to the refrigerant, and the refrigerant carries this part of the heat and flows back to the second evaporator 705.

[0033] The temperature control water tank 801 intercepts most of the heat that the low-temperature refrigeration system 6 should have released to the outside and stores it in the internal liquid. When the high-temperature heat supply system 7 circulates, it extracts this part of the heat from the liquid in the temperature control water tank 801 and, as a bridge, efficiently transfers the heat of the low-temperature constant temperature bath 1 to the high-temperature constant temperature bath 2. The heat that the first condenser 603 needs to release to the outside and the heat that the second evaporator 705 needs to absorb from the outside are both greatly reduced, and the self-energy consumption of the low-temperature refrigeration system 6 and the high-temperature heat supply system 7 is greatly reduced.

[0034] When the set temperatures of the low-temperature constant temperature bath 1 and the high-temperature constant temperature bath 2 and the external temperature are specific values, the temperatures at the first condenser 603 and the second evaporator 705 can even be equal to the external temperature, and almost no heat exchange occurs. At this time, all the heat absorbed from the low-temperature constant temperature bath 1 is transported and transferred to the high-temperature constant temperature bath 2, reaching the most ideal experimental state.

[0035] In a preferred solution, a medium-temperature bath 5 is further provided between the low-temperature constant temperature bath 1 and the high-temperature constant temperature bath 2. The heat regulation system 8 includes a third transducer 802. The third transducer 802 is arranged in a temperature control water tank 801. A fourth transducer 803 is arranged in the medium-temperature bath 5. A circulation pump 804 is also provided. The circulation pump 804 communicates with the third transducer 802 and the fourth transducer 803 to circulate a liquid between the third transducer 802 and the fourth transducer 803.

[0036] Since the experimental temperature of the high-temperature constant temperature bath 2 is usually much higher than the external temperature, when the transfer mechanism 3 transfers the heat-conducting container 4 from the high-temperature constant temperature bath 2 to the low-temperature constant temperature bath 1, it will naturally cool down. In order to reduce the heat dissipated during this process, a heat-insulating cover channel can be provided between the openings at the upper ends of the low-temperature constant temperature bath 1 and the high-temperature constant temperature bath 2. The heat-conducting container 4 is transferred back and forth within the heat-insulating cover channel. However, since there is still heat conduction between the heat-insulating cover and the outside, and openings also need to be left at the inlet and outlet channels of the heat-conducting container 4. Therefore, a medium-temperature bath 5 filled with a heat-conducting liquid is arranged between the low-temperature constant temperature bath 1 and the high-temperature constant temperature bath 2 on the test bench. A centralized tube-structured third transducer 802 can be installed at the lower end inside the medium-temperature bath 5, and a heat-conducting liquid medium is circulated between the medium-temperature bath 5 and the temperature control water tank 801 through a circulation pump 804 and pipelines to accelerate heat exchange, making the temperature of the temperature control water tank 801 equal to that of the medium-temperature bath 5.

[0037] When the transfer mechanism 3 transfers the heat-conducting container 4 out of the high-temperature constant temperature bath 2, it first immerses it in the liquid in the medium-temperature bath 5 for a period of time. Since the amount of phase change material in the heat-conducting container 4 is not large, this process takes a short time and does not occupy too much experimental rhythm. After the medium-temperature bath 5 absorbs the heat of the heat-conducting container 4, the transfer mechanism 3 continues to transfer the heat-conducting container 4 into the low-temperature constant temperature bath 1. Since the temperature difference between the heat-conducting container 4 and the low-temperature constant temperature bath 1 has decreased compared to before, the impact on the temperature of the low-temperature constant temperature bath 1 when immersed in the low-temperature constant temperature bath 1 is greatly reduced. Conversely, when transferring the heat-conducting container 4 from the low-temperature constant temperature bath 1 to the high-temperature constant temperature bath 2, the temperature difference is also reduced through the medium-temperature bath 5. Therefore, the medium-temperature bath 5 can reduce the temperature fluctuations of the low-temperature constant temperature bath 1 and the high-temperature constant temperature bath 2 during the experiment and reduce experimental errors.

[0038] Exhaust fans can be provided at the pipeline structures where the first condenser 603 and the second evaporator 705 are centrally arranged to exhaust hot air to the outside or introduce cold air.

[0039] In a preferred embodiment, the first heat exchanger 602, the second heat exchanger 702, and the third transducer 802 are immersed in the liquid in the temperature control water tank 801.

[0040] Since the first heat exchanger 602, the second heat exchanger 702, and the third transducer 802 are tube structures arranged centrally, the tube walls immersed in the liquid are in direct contact with the liquid medium, and the heat exchange efficiency is higher compared to being attached to the outer wall of the temperature control water tank 801.

[0041] In a preferred embodiment, a heat insulation chamber 809 is provided on the outer wall of the temperature control water tank 801. An electric heater 805 is provided in the heat insulation chamber 809. The electric heater 805 is attached to the outer wall of the temperature control water tank 801, and heat conducting fins 808 are provided on the inner wall of the temperature control water tank 801 at the location of the electric heater 805.

[0042] The electric heater 805 is provided with heating wires. Since the external temperature is not constant, when the heat released by the low-temperature refrigeration system 6 to the medium-temperature tank 5 is less than the heat required by the high-temperature heat supply system 7, the air intake of the second evaporator 705 can be increased, the air outlet of the first condenser 603 can be reduced, and the electric heater 805 can be turned on to heat the liquid medium in the temperature control water tank 801. The heat is quickly transferred into the liquid medium through the side wall of the temperature control water tank 801 and the heat conducting fins 808 to make up for the heat gap.

[0043] In a preferred embodiment, a plurality of heat conducting rods 807 arranged in rows and columns are provided in the temperature control water tank 801. One end of the heat conducting rod 807 passes through the temperature control water tank 801 to extend out. A cooling fan 806 is further provided outside the temperature control water tank 801, and the air outlet of the cooling fan 806 faces the extended heat conducting rod 807.

[0044] A plurality of through holes can be drilled at the bottom of the temperature control water tank 801, and the heat conducting rods 807 are inserted. The joints are welded and sealed to prevent liquid leakage. The heat conducting rods 807 can be made of copper. Since a part of the heat conducting rod 807 is inserted into the temperature control water tank 801, the contact surface with the liquid medium is increased. For the extended part, the cooling fan 806 is installed, and the heat flow will quickly dissipate the heat derived into the outside world to reduce the temperature in the temperature control water tank 801.

[0045] When the heat released by the low-temperature refrigeration system 6 to the medium-temperature tank 5 is greater than the heat required by the high-temperature heat supply system 7, the air intake of the second evaporator 705 can be reduced, the air outlet of the first condenser 603 can be increased, and the cooling fan 806 can be turned on to accelerate the heat dissipation efficiency and reduce the temperature in the temperature control water tank 801.

[0046] Embodiment 2:

[0047] The ambient temperature is 25°C, the heating temperature is 50°C, the heating capacity is 1 kW, the evaporator temperature is 25°C, and the COP is 4.2. The cooling capacity is 1 kW, the condensation temperature is 35°C, the refrigeration COP is 2.8, and the power consumptions of the heating and refrigeration equipment are 0.24 kW and 0.36 kW respectively, with a total power consumption of 0.60 kW. After comprehensively utilizing the cold and heat energy, the COP of the heating system is increased to 5.3, the COP of the refrigeration system is increased to 3.3, the electric energies required for heating and refrigeration are 0.19 kW and 0.3 kW respectively, the total electric energy is 0.49 kW, and the energy is saved by 18.6%.

[0048] Example 3:

[0049] The ambient temperature is 25°C, the heating temperature is 50°C, the heating capacity is 1.5 kW, the evaporator temperature is 25°C, and the COP is 4.2. The cooling capacity is 1 kW, the condensation temperature is 35°C, the refrigeration COP is 2.8, and the power consumptions of the heating and refrigeration equipment are 0.36 kW and 0.36 kW respectively, with a total power consumption of 0.72 kW. After comprehensively utilizing the cold and heat energy, the COP of the heating system is increased to 4.8, the COP of the refrigeration system is increased to 3.5, the electric energies required for heating and refrigeration are 0.31 kW and 0.29 kW respectively, the total electric energy is 0.6 kW, and the energy is saved by 16%.

[0050] Example 4:

[0051] The ambient temperature is 25°C, the heating temperature is 60°C, the heating capacity is 1 kW, the evaporator temperature is 25°C, and the COP is 3.8. The cooling capacity is 1.5 kW, the condensation temperature is 35°C, the refrigeration COP is 2.8, and the power consumptions of the heating and refrigeration equipment are 0.26 kW and 0.54 kW respectively, with a total power consumption of 0.8 kW. After comprehensively utilizing the cold and heat energy, the COP of the heating system is increased to 4.7, the COP of the refrigeration system is slightly decreased to 2.7, the electric energies required for heating and refrigeration are 0.21 kW and 0.55 kW respectively, the total electric energy is 0.76 kW, and the energy is saved by 5%.

[0052] The above embodiments are only the preferred technical solutions of the present invention and should not be regarded as limitations on the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, the equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A heat exchange system for temperature cycle testing of phase change materials, characterized in that: It includes a low-temperature constant temperature bath (1) and a high-temperature constant temperature bath (2). The transfer mechanism (3) transports the heat-conducting container (4) filled with phase change material and immerses it alternately into the low-temperature constant temperature bath (1) and the high-temperature constant temperature bath (2). It also includes a low-temperature refrigeration system (6), a high-temperature heating system (7), and a heat regulation system (8). The low-temperature refrigeration system (6) refrigerates the low-temperature constant temperature bath (1), the high-temperature heating system (7) heats the high-temperature constant temperature bath (2), and the heat regulation system (8) includes a temperature regulation water tank (801) and an electric heater (805). There is liquid in the temperature regulation water tank (801). The temperature regulation water tank (801) is provided with a first heat exchanger (602) and a second heat exchanger (702). The low-temperature refrigeration system (6) exchanges heat with the temperature regulation water tank (801) through the first heat exchanger (602), and the high-temperature heating system (7) exchanges heat with the temperature regulation water tank (801) through the second heat exchanger (702).

2. The heat exchange system for temperature cycling test of phase change materials according to claim 1, wherein: The low-temperature refrigeration system (6) includes a first compressor (601), a first heat exchanger (602), a first condenser (603), a first expansion valve (604), and a first evaporator (605) that are connected in sequence. The first evaporator (605) is placed inside the low-temperature constant temperature bath (1).

3. The heat exchange system for temperature cycling test of phase change materials according to claim 1, characterized in that: The high-temperature heating system (7) includes a second compressor (701), a second condenser (703), a second expansion valve (704), a second heat exchanger (702), and a second evaporator (705) that are connected in sequence. The second condenser (703) is placed inside the high-temperature constant temperature bath (2).

4. The heat exchange system for temperature cycling test of phase change materials according to claim 1, characterized in that: There is also an intermediate-temperature bath (5) provided between the low-temperature constant temperature bath (1) and the high-temperature constant temperature bath (2). The heat regulation system (8) includes a third transducer (802). The third transducer (802) is arranged inside the temperature regulation water tank (801). There is a fourth transducer (803) arranged inside the intermediate-temperature bath (5). There is also a circulation pump (804). The circulation pump (804) connects the third transducer (802) and the fourth transducer (803) to circulate the liquid between the third transducer (802) and the fourth transducer (803).

5. The heat exchange system for temperature cycling test of phase change materials according to claim 4, characterized in that: The first heat exchanger (602), the second heat exchanger (702), and the third transducer (802) are immersed in the liquid inside the temperature regulation water tank (801).

6. The heat exchange system for the temperature cycling test of the phase change material according to claim 4, wherein: The outer wall of the temperature regulation water tank (801) is provided with a heat insulation chamber (809). There is an electric heater (805) arranged inside the heat insulation chamber (809). The electric heater (805) abuts against the outer wall of the temperature regulation water tank (801). There are heat conduction fins (808) arranged on the inner wall of the temperature regulation water tank (801) at the position of the electric heater (805).

7. The heat exchange system for temperature cycling test of phase change materials according to claim 4, characterized in that: There are multiple heat conduction rods (807) arranged in rows and columns inside the temperature regulation water tank (801). One end of the heat conduction rod (807) passes through the temperature regulation water tank (801) to extend out. There is also a cooling fan (806) arranged outside the temperature regulation water tank (801). The air outlet of the cooling fan (806) faces the extended heat conduction rods (807).

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