Energy-saving temperature control system for new energy test

Abstract

The utility model provides an energy-saving temperature control system for new energy testing, which is used for controlling the temperature of a tested piece in a tested space and comprises a secondary refrigerant system used for providing a secondary refrigerant for the tested space, a cooling water refrigerating system used for reducing the temperature of the secondary refrigerant and a compressor refrigerating system used for reducing the temperature of the secondary refrigerant. A second channel of the heat exchanger in the secondary refrigerant system is connected with a loop of the cooling water refrigerating system through a pipeline, and a third channel of the heat exchanger in the secondary refrigerant system is connected with a loop of the compressor refrigerating system through a pipeline, so that mutual connection among the secondary refrigerant system, the cooling water refrigerating system and the compressor refrigerating system is realized; different refrigerating systems are used for refrigerating the secondary refrigerant at different required temperatures of the tested piece, so that the service time of the compressor is shortened, and the energy consumption of the whole unit is reduced.

Description

Technical Field

[0001] The utility model relates to a temperature control system, in particular to an energy-saving temperature control system for new energy testing. Background Art

[0002] The current temperature control system on the market consists of a compressor refrigeration system and a refrigerant system. During the entire temperature control process, the compressor needs to be turned on all the time to achieve thermal balance with the internal electric heating of the equipment and the external battery pack to complete precise temperature control; since the compressor is always involved in the work, the energy consumption is high. Summary of the invention

[0003] In view of the deficiencies in the prior art, the utility model provides an energy-saving new energy test temperature control system, which uses a cooling water refrigeration system to participate in the refrigeration of the coolant above the critical temperature requirement, and uses a compressor refrigeration system to participate in the refrigeration of the coolant below the critical temperature requirement, so as to achieve separate control under different temperature requirements, reduce the use time of the compressor, reduce the energy consumption of the entire unit, and achieve the purpose of energy saving. The technical solution adopted by the utility model is:

[0004] An energy-saving new energy test temperature control system, used to control the temperature of a test object in a test space, including a coolant system for providing a coolant to the test space, a cooling water refrigeration system for reducing the temperature of the coolant, and a compressor refrigeration system for reducing the temperature of the coolant;

[0005] The second channel of the heat exchanger in the refrigerant system is connected to the loop of the cooling water refrigeration system through a pipeline, and the third channel of the heat exchanger in the refrigerant system is connected to the loop of the compressor refrigeration system through a pipeline, so as to realize the mutual connection between the refrigerant system, the cooling water refrigeration system and the compressor refrigeration system.

[0006] Furthermore, it also includes a cooling water inlet and a cooling water outlet, the cooling water inlet is used to provide cooling water for the cooling water refrigeration system and the compressor refrigeration system, and the cooling water outlet is used to recover cooling water for the cooling water refrigeration system and the compressor refrigeration system.

[0007] Furthermore, the cooling water inlet and the cooling water outlet are lower than the height of the heat exchanger.

[0008] Furthermore, the cooling water refrigeration system includes an electric regulating valve and a cooling water solenoid valve, one end of the electric regulating valve is connected to the cooling water inlet through a pipeline, and the other end is connected to the second channel inlet of the heat exchanger through a pipeline, one end of the cooling water solenoid valve is connected to the cooling water outlet through a pipeline, and the other end is connected to the second channel outlet of the heat exchanger through a pipeline.

[0009] Further, the compressor refrigeration system includes a compressor, a water-cooled condenser, a liquid storage tank, a drying filter, an electronic expansion valve and a regenerator;

[0010] One end of the compressor is connected to the first channel inlet of the water-cooled condenser through a pipeline, and the other end is connected to the first channel outlet of the regenerator through a pipeline, and the first channel inlet of the regenerator is connected to the third channel outlet of the heat exchanger through a pipeline;

[0011] The first channel outlet of the water-cooled condenser is connected to one end of the liquid storage tank through a pipeline, the second channel inlet of the water-cooled condenser is connected to the cooling water inlet through a pipeline, and the second channel outlet of the water-cooled condenser is connected to the cooling water outlet through a pipeline;

[0012] The other end of the liquid storage tank is connected to one end of the drying filter through a pipeline;

[0013] One end of the filter drier is connected to one end of the electronic expansion valve through a pipeline;

[0014] The other end of the electronic expansion valve is connected to the second channel inlet of the heat regenerator through a pipeline, and the second channel outlet of the heat regenerator is connected to the third channel inlet of the heat exchanger through a pipeline.

[0015] Furthermore, pressure sensors are respectively provided at the inlet and outlet of the compressor.

[0016] Furthermore, the refrigerant system includes an expansion tank, a one-way valve, a heating pipe, an internal circulation pump, an external circulation pump and a heat exchanger, the outlet of the expansion tank is connected to the inlet of the one-way valve through a pipeline, and the outlet of the one-way valve is connected to the inlet of the heating pipe through a pipeline; the outlet of the heating pipe is connected to the inlet of the internal circulation pump and the inlet of the external circulation pump through pipelines respectively, the outlet of the internal circulation pump is connected to the first channel inlet of the heat exchanger, the first channel outlet of the heat exchanger is connected to the reflux port of the heating pipe through a pipeline, the outlet of the external circulation pump is connected to the inlet of the measured space through a pipeline, and the outlet of the measured space is connected to the reflux port of the heating pipe through a pipeline.

[0017] Furthermore, a flow meter is provided on the pipeline between the reflux port of the heating tube and the measured space; and a temperature sensor is provided at the outlet of the heating tube.

[0018] Furthermore, a liquid level gauge is provided on the side of the expansion tank, and a liquid filling port is provided on the top of the expansion tank.

[0019] Furthermore, the exhaust port of the heating tube is connected to the reflux port of the expansion tank through a pipeline.

[0020] The advantages of the utility model are as follows: the required temperature of the coolant in the coolant system is inferred by the required temperature of the measured part in the measured space being above or below the critical temperature, so that the coolant is cooled by the cooling water refrigeration system and the compressor refrigeration system respectively, the compressor does not need to work continuously, and the energy consumption of the entire unit during use is reduced, thereby achieving the purpose of energy saving. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a piping layout diagram of the utility model.

[0022] Figure 2 This is the piping layout diagram of the cooling system.

[0023] Figure 3 This is the piping layout diagram of the cooling water refrigeration system.

[0024] Figure 4 This is the piping layout diagram of the compressor refrigeration system.

[0025] In the figure: 1-refrigerant system, 2-cooling water refrigeration system, 3-compressor refrigeration system, 4-cooling water inlet, 5-cooling water outlet, 6-measured space, 110-expansion tank, 120-check valve, 130-heating pipe, 131-temperature sensor, 140-internal circulation pump, 150-external circulation pump, 160-heat exchanger, 170-flow meter, 210-electric regulating valve, 220-cooling water solenoid valve, 310-compressor, 320-water-cooled condenser, 330-liquid storage tank, 340-drying filter, 350-electronic expansion valve, 360-regenerator. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0027] Please refer to the attached Figure 1-4The utility model provides an energy-saving temperature control system for testing new energy, which is used to control the temperature of a test object in a test space 6, including a coolant system 1 for providing a coolant to the test space 6, a cooling water refrigeration system 2 for reducing the temperature of the coolant, a compressor refrigeration system 3 for reducing the temperature of the coolant, a cooling water inlet 4 and a cooling water outlet 5; the second channel of the heat exchanger 160 in the coolant system 1 is connected to the circuit of the cooling water refrigeration system 2 through a pipeline, and the third channel of the heat exchanger 160 in the coolant system 1 is connected to the circuit of the compressor refrigeration system 3 through a pipeline to realize the mutual connection between the coolant system 1, the cooling water refrigeration system 2, and the compressor refrigeration system 3, the cooling water inlet 4 is used to provide cooling water for the cooling water refrigeration system 2 and the compressor refrigeration system 3, and the cooling water outlet 5 is used to recover cooling water for the cooling water refrigeration system 2 and the compressor refrigeration system 3.

[0028] In this application, the critical temperature required for temperature control of the measured object in the measured space 6 is mainly used to distinguish the selection of water-cooled refrigeration system and compressor refrigeration system, and does not represent a specific temperature value. For example, critical temperature = cooling water temperature + temperature difference 3°C; when the required temperature of the measured object in the measured space 6 is higher than the critical temperature, the cooling water refrigeration system 2 works and the compressor refrigeration system 3 does not work; when the required temperature of the measured object in the measured space 6 is lower than the critical temperature, the compressor refrigeration system 3 works and the cooling water refrigeration system 2 does not work.

[0029] The heat exchanger 160 in the present application is a dual independent channel system, that is, except that the refrigerant in the refrigerant system 1 flows in the first channel of the heat exchanger 160 as the medium to be output, the second channel and the third channel of the heat exchanger 160 are not interconnected. When the cooling water in the cooling water refrigeration system 2 flows in the second channel, it exchanges heat with the refrigerant in the first channel to cool the refrigerant. When the refrigerant in the compressor refrigeration system 3 flows in the third channel, it exchanges heat with the refrigerant in the first channel to cool the refrigerant, thereby realizing the separate heat exchange work of the cooling water refrigeration system 2 and the compressor refrigeration system 3.

[0030] By adding a cooling water refrigeration system 2, using cooling water as a medium, and cooperating with the heat exchanger 160, the working time of the compressor refrigeration system 3 is reduced, and the power consumption of the compressor is reduced compared to when the compressor refrigeration system 3 is originally involved, thereby saving energy.

[0031] It should be noted that the coolant of the present application can be passed into the measured space 6 to contact the surface of the measured object, or can be laid on the cavity wall of the measured space 6 through a pipeline to perform non-contact heat exchange with the measured object.

[0032] Furthermore, the cooling water inlet 4 and the cooling water outlet 5 are lower than the height of the heat exchanger 160; by arranging the height difference between the heat exchanger 160 and the cooling water inlet and outlet, when the cooling water refrigeration system 2 is not working, it is convenient to discharge the cooling water in the second channel of the heat exchanger 160, thereby preventing the cooling water system 2 from freezing the cooling water in the second channel when using the compressor refrigeration system 3 for cooling, thereby preventing the heat exchanger 160 from being damaged by freezing.

[0033] The specific piping arrangement of the cooling water refrigeration system 2 of the present application is as follows: the cooling water refrigeration system 2 includes an electric regulating valve 210 and a cooling water solenoid valve 220, one end of the electric regulating valve 210 is connected to the cooling water inlet 4 through a pipeline, and the other end is connected to the second channel inlet of the heat exchanger 160 through a pipeline, and one end of the cooling water solenoid valve 220 is connected to the cooling water outlet 5 through a pipeline, and the other end is connected to the second channel outlet of the heat exchanger 160 through a pipeline.

[0034] The specific piping arrangement of the refrigerant system 1 of the present application is as follows: the refrigerant system 1 includes an expansion tank 110, a one-way valve 120, a heating pipe 130, an internal circulation pump 140, an external circulation pump 150 and a heat exchanger 160, the outlet of the expansion tank 110 is connected to the inlet of the one-way valve 120 through a pipeline, and the outlet of the one-way valve 120 is connected to the inlet of the heating pipe 130 through a pipeline; the outlet of the heating pipe 130 is provided with a temperature sensor 131; the outlet of the heating pipe 130 is respectively connected to the inlet of the internal circulation pump 140 and the inlet of the external circulation pump 150 through pipelines, the outlet of the internal circulation pump 140 is connected to the first channel inlet of the heat exchanger 160, the first channel outlet of the heat exchanger 160 is connected to the reflux port of the heating pipe 130 through a pipeline, the outlet of the external circulation pump 150 is connected to the inlet of the measured space 6 through a pipeline, and the outlet of the measured space 6 is connected to the reflux port of the heating pipe 130 through a pipeline. The measured object in the measured space 6 exchanges heat with the coolant in the outer measured space 6 .

[0035] When the measured space 6 requires medium to high temperature, that is, the required temperature is higher than the critical temperature, the compressor refrigeration system 3 stops working, the electric regulating valve 210 and the cooling water solenoid valve 220 are opened, and the cooling water refrigeration system 2 starts cooling water circulation; the refrigerant exchanges heat with the cooling water through the heat exchanger 4 under the transportation of the internal circulation pump 140, and the heat of the refrigerant is taken away by the cooling water and then heated by the heating pipe 130 to make the internal circulation of the refrigerant reach a balance. The refrigerant in the liquid storage tank 330 reaches the temperature that needs to be controlled, and is then transported to the measured space 6 by the external circulation pump 150 to exchange heat with objects such as the battery pack in the measured space 6.

[0036] Furthermore, the cooling water flow in the second channel of the heat exchanger 160 can be accurately controlled by the electric regulating valve 210, and the temperature of the coolant can be monitored by the temperature sensor 131 at the outlet of the heating pipe 130, and the amount of cooling water can be adjusted according to the different temperatures of the coolant. The electric regulating valve 210 can adopt a fuzzy PID control algorithm to adjust the water inlet flow according to the provided cooling water temperature, so that the refrigeration capacity obtained by the coolant can be accurately adjusted, achieving a higher control accuracy and ensuring the stability of the heat exchange temperature.

[0037] The specific piping arrangement of the compressor refrigeration system 3 of the present application is as follows: the compressor refrigeration system 3 includes a compressor 310, a water-cooled condenser 320, a liquid storage tank 330, a drying filter 340, an electronic expansion valve 350 and a regenerator 360; one end of the compressor 310 is connected to the first channel inlet of the water-cooled condenser 320 through a pipeline, and the other end is connected to the first channel outlet of the regenerator 360 through a pipeline, and the first channel inlet of the regenerator 360 is connected to the third channel outlet of the heat exchanger 160 through a pipeline; the first channel outlet of the water-cooled condenser 320 is connected to the storage tank 330 through a pipeline. At one end of the liquid tank 330, the second channel inlet of the water-cooled condenser 320 is connected to the cooling water inlet 4 through a pipeline, and the second channel outlet of the water-cooled condenser 320 is connected to the cooling water outlet 5 through a pipeline; the other end of the liquid storage tank 330 is connected to one end of the drying filter 340 through a pipeline; one end of the drying filter 340 is connected to one end of the electronic expansion valve 350 through a pipeline; the other end of the electronic expansion valve 350 is connected to the second channel inlet of the regenerator 360 through a pipeline, and the second channel outlet of the regenerator 360 is connected to the third channel inlet of the heat exchanger through a pipeline.

[0038] The pipes of the various components in the compressor refrigeration system 3 are connected to form a closed pipe system, and the refrigerant circulates in the system, and the purpose of refrigeration is achieved by continuously changing the state. In the regenerator 360, heat exchange occurs with the lubricating oil in the pipeline to achieve the purpose of refrigeration. The low-pressure refrigerant vapor generated in the regenerator 360 is first sucked in by the compressor and adiabatically compressed to the condensation pressure, and then enters the water-cooled condenser 320, cooled by the cooling water and condensed into a high-pressure liquid. The refrigerant liquid is adiabatically expanded through the electronic expansion valve 350, and the pressure is reduced to the evaporation pressure. At the same time, the temperature is reduced to the evaporation temperature, and it becomes a gas-liquid two-phase mixture, and then enters the heat exchanger 160, absorbs the heat of the coolant in the regenerator 360 at a low temperature and evaporates into steam, which is sucked into the compressor again to start circulation. The entire refrigeration process is achieved by reducing the temperature of the refrigerant inside the heat exchanger 160.

[0039] When the measured part in the measured space 6 requires a low temperature, that is, the required temperature is lower than the critical temperature, the cooling water refrigeration system 2 stops working, the electric regulating valve 210 and the cooling water solenoid valve 220 are closed, and the cooling water in the second channel of the heat exchanger 160 will be discharged under the action of gravity; at the same time, the compressor refrigeration system 3 works, and the coolant is transported by the internal circulation pump 140 and exchanges heat with the refrigerant through the heat exchanger 4. The heat is taken away by the refrigerant in the heat exchanger 4, and then heated by the heating tube 130 to reach a temperature equilibrium. The temperature in the liquid storage tank 330 reaches the temperature that needs to be controlled, and then is transported to the measured space 6 through the external circulation pump 150.

[0040] On the one hand, by adding the cooling water refrigeration system 2, the compressor 310 that originally needed to work continuously can work intermittently, and the cooling water refrigeration system 2 is only equipped with two components, the electric regulating valve 210 and the cooling water solenoid valve 220. Compared with the compressor 310, the power is greatly reduced, and the heating pipe 130 that fights against refrigeration has a lower output power than the original, thereby reducing energy consumption compared with the original system and achieving the purpose of energy saving.

[0041] On the other hand, the cooling water in the cooling water system 2 is supplied to the water-cooled condenser 320 by an external water source and is directly introduced into the heat exchanger 160, without laying independent pipelines and separate cooling media, thus reducing the complexity of pipeline design.

[0042] On the other hand, when the compressor refrigeration system 3 is in use, the cooling water in the pipeline of the cooling water refrigeration system 2 is drained to prevent the pipeline in the second channel of the heat exchanger 160 from being frozen.

[0043] In the present application, in order to further monitor the working pressure of the compressor 310 and help accurately control the working state of the compressor 310, pressure sensors are respectively provided at the inlet and outlet of the compressor 310.

[0044] In the present application, in order to accurately monitor the flow rate of the coolant, a flow meter 170 is provided on the pipeline between the reflux port of the heating tube 130 and the measured space 6 .

[0045] Furthermore, a liquid level gauge is provided on the side of the expansion tank 110, and a liquid filling port is provided on the top of the expansion tank 110. The liquid level gauge is convenient for monitoring the liquid level of the brine in the expansion tank 110, and for adding the amount of brine through the liquid filling port.

[0046] Furthermore, in order to exhaust the air in the refrigerant system 1, make the system full of liquid circulation, and avoid the internal and external circulation pumps from sucking in air, the exhaust port of the heating pipe 130 is connected to the reflux port of the expansion tank 110 through a pipeline.

[0047] In one embodiment, the cooling water can be replaced with chilled water, such as ethylene glycol aqueous solution at -10°C. For example, the temperature control system controls the temperature range of -40°C-100°C, and the critical temperature is -10°C+3°C)=-7°C. When the required temperature is higher than -7°C, the ethylene glycol aqueous solution can be directly used as the cooling medium of the cooling water refrigeration system 2 to refrigerate the refrigerant without starting the compressor refrigeration system 3.

[0048] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. An energy-saving new energy testing temperature control system for controlling the temperature of a test object in a test space (6), characterized in that: It comprises a refrigerant system (1) for providing a refrigerant to a measured space (6), a cooling water refrigeration system (2) for reducing the temperature of the refrigerant, and a compressor refrigeration system (3) for reducing the temperature of the refrigerant; The second channel of the heat exchanger (160) in the refrigerant system (1) is connected to the circuit of the cooling water refrigeration system (2) through a pipeline, and the third channel of the heat exchanger (160) in the refrigerant system (1) is connected to the circuit of the compressor refrigeration system (3) through a pipeline, so as to realize the mutual connection between the refrigerant system (1), the cooling water refrigeration system (2), and the compressor refrigeration system (3).

2. The energy-saving new energy testing temperature control system according to claim 1, characterized in that: It also includes a cooling water inlet (4) and a cooling water outlet (5), wherein the cooling water inlet (4) is used to provide cooling water to the cooling water refrigeration system (2) and the compressor refrigeration system (3), and the cooling water outlet (5) is used to recover cooling water from the cooling water refrigeration system (2) and the compressor refrigeration system (3).

3. The energy-saving new energy testing temperature control system according to claim 2 is characterized in that: The cooling water inlet (4) and the cooling water outlet (5) are lower than the height of the heat exchanger (160).

4. The energy-saving new energy testing temperature control system according to claim 2, characterized in that: The cooling water refrigeration system (2) comprises an electric regulating valve (210) and a cooling water solenoid valve (220); one end of the electric regulating valve (210) is connected to a cooling water inlet (4) via a pipeline, and the other end is connected to a second channel inlet of a heat exchanger (160) via a pipeline; one end of the cooling water solenoid valve (220) is connected to a cooling water outlet (5) via a pipeline, and the other end is connected to a second channel outlet of the heat exchanger (160) via a pipeline.

5. The energy-saving new energy testing temperature control system according to claim 2, characterized in that: The compressor refrigeration system (3) comprises a compressor (310), a water-cooled condenser (320), a liquid storage tank (330), a drying filter (340), an electronic expansion valve (350) and a regenerator (360); One end of the compressor (310) is connected to the first channel inlet of the water-cooled condenser (320) through a pipeline, and the other end is connected to the first channel outlet of the regenerator (360) through a pipeline, and the first channel inlet of the regenerator (360) is connected to the third channel outlet of the heat exchanger (160) through a pipeline; The first channel outlet of the water-cooled condenser (320) is connected to one end of the liquid storage tank (330) via a pipeline, the second channel inlet of the water-cooled condenser (320) is connected to the cooling water inlet (4) via a pipeline, and the second channel outlet of the water-cooled condenser (320) is connected to the cooling water outlet (5) via a pipeline; The other end of the liquid storage tank (330) is connected to one end of a drying filter (340) via a pipeline; One end of the drying filter (340) is connected to one end of the electronic expansion valve (350) via a pipeline; The other end of the electronic expansion valve (350) is connected to the second channel inlet of the regenerator (360) via a pipeline, and the second channel outlet of the regenerator (360) is connected to the third channel inlet of the heat exchanger via a pipeline.

6. The energy-saving new energy testing temperature control system according to claim 5, characterized in that: Pressure sensors are respectively provided at the inlet and outlet of the compressor (310).

7. The energy-saving new energy testing temperature control system according to claim 1, characterized in that: The refrigerant system (1) comprises an expansion tank (110), a one-way valve (120), a heating pipe (130), an internal circulation pump (140), an external circulation pump (150) and a heat exchanger (160); the outlet of the expansion tank (110) is connected to the inlet of the one-way valve (120) through a pipeline, and the outlet of the one-way valve (120) is connected to the inlet of the heating pipe (130) through a pipeline; the outlet of the heating pipe (130) is connected to the inlet of the internal circulation pump (140) and the inlet of the external circulation pump (150) through pipelines respectively; the outlet of the internal circulation pump (140) is connected to the inlet of a first channel of the heat exchanger (160), the outlet of the first channel of the heat exchanger (160) is connected to the reflux port of the heating pipe (130) through a pipeline, the outlet of the external circulation pump (150) is connected to the inlet of a measured space (6) through a pipeline, and the outlet of the measured space (6) is connected to the reflux port of the heating pipe (130) through a pipeline.

8. The energy-saving new energy testing temperature control system according to claim 7, characterized in that: A flow meter (170) is provided on the pipeline between the reflux port of the heating tube (130) and the measured space (6); and a temperature sensor (131) is provided at the outlet of the heating tube (130).

9. The energy-saving new energy testing temperature control system according to claim 7, characterized in that: A liquid level gauge is provided on the side of the expansion tank (110), and a liquid filling port is provided on the top of the expansion tank (110).

10. The energy-saving new energy testing temperature control system according to claim 7, characterized in that: The exhaust port of the heating pipe (130) is connected to the return port of the expansion tank (110) via a pipeline.

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