Heat exchange device and system applied to new energy offline test board

Abstract

The utility model discloses a heat exchange device and system applied to a new energy offline test board. The heat exchange device comprises refrigeration assemblies, circulation assemblies, first test benches and a ventilation assembly, one refrigeration assembly corresponds to one circulation assembly, one circulation assembly corresponds to one first test bench, and the first test benches are used for placing to-be-cooled equipment; the refrigeration assembly is used for generating a refrigerant; the circulation assembly comprises an inner circulation heat exchange unit and an outer circulation heat exchange unit. The inner circulation heat exchange units communicate with the corresponding refrigeration assemblies and are used for adjusting the temperature of liquid through refrigerants. The outer circulation heat exchange unit communicates with the inner circulation heat exchange unit and the corresponding to-be-cooled equipment and is used for cooling the to-be-cooled equipment through liquid; and the ventilation assembly communicates with the to-be-cooled equipment and is used for ventilating the to-be-cooled equipment after the to-be-cooled equipment is cooled so as to discharge residual liquid in the to-be-cooled equipment. According to the scheme, the cooling effect on the to-be-cooled equipment can be improved, and meanwhile energy consumption is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heat dissipation, and in particular to a heat exchange device and system applied to a new energy offline test bench. Background Art

[0002] The new energy offline test bench is a test bench for testing the product under test (such as the engine of a new energy vehicle, etc.). During the test, since the product under test will continue to heat up, it is necessary to cool the product under test to ensure the normal operation of the product under test and extend the life of the product under test.

[0003] At present, the cooling of the tested product is mainly achieved by using factory cooling water to exchange heat with the tested product through a heat exchanger, thereby achieving temperature control of the tested product. However, the control accuracy of this method fluctuates greatly, and the cooling effect may not be ideal; and it cannot take into account the cooling of other equipment (such as dynamometers, etc.) during the test process, and the function is relatively single. Utility Model Content

[0004] The utility model provides a heat exchange device and system applied to a new energy offline test bench, which can improve the cooling effect of the equipment to be cooled and save energy consumption at the same time.

[0005] According to one aspect of the utility model, a heat exchange device applied to a new energy offline test bench is provided, comprising: a refrigeration component, a circulation component, a first test bench and a ventilation component, wherein one refrigeration component corresponds to one circulation component, one circulation component corresponds to one first test bench, and the first test bench is used to place equipment to be cooled;

[0006] A refrigeration component for generating a refrigerant;

[0007] The circulation component includes an internal circulation heat exchange unit and an external circulation heat exchange unit; the internal circulation heat exchange unit is connected to the corresponding refrigeration component and is used to adjust the temperature of the liquid by using the refrigerant; the external circulation heat exchange unit is respectively connected to the internal circulation heat exchange unit and the corresponding device to be cooled and is used to cool the device to be cooled by using the liquid;

[0008] The ventilation component is communicated with the device to be cooled, and is used to ventilate the device to be cooled after cooling the device to be cooled, so as to discharge the residual liquid in the device to be cooled.

[0009] Optionally, the equipment to be cooled includes a product under test and / or a dynamometer;

[0010] When the equipment to be cooled includes a product under test, the heat exchange device applied to the new energy offline test bench also includes: a detection component and a second test bench, a first test bench for placing the product under test corresponds to a detection component and a second test bench, and the second test bench is used to place the product under test after the residual liquid is discharged;

[0011] The detection component is connected to the corresponding product under test, and is used to cooperate with the ventilation component to detect the air tightness of the product under test before cooling the product under test;

[0012] The ventilation component is also used to ventilate the product under test placed on the second test bench to perform secondary discharge of the residual liquid in the product under test.

[0013] Optionally, the number of refrigeration components, the number of circulation components, and the number of first test benches are all 2, and the number of ventilation components is 1;

[0014] One first test bench is used for placing the product to be tested, and the other first test bench is used for placing the dynamometer.

[0015] Optionally, the refrigeration assembly includes: a compressor, a condenser, a filter drier, a main solenoid valve, a main expansion valve, an evaporator, a pressure gauge and a pressure controller;

[0016] One end of the compressor is connected to one end of the condenser, and the compressor is used to compress the refrigerant stored inside and discharge high-temperature and high-pressure gas to the condenser;

[0017] The other end of the condenser is connected to the first end of the evaporator, and the second end of the evaporator is connected to the other end of the compressor; the drying filter, the main solenoid valve, and the main expansion valve are sequentially arranged between the other end of the condenser and the first end of the evaporator;

[0018] The condenser is connected to an external water source; the condenser is used to perform heat exchange and condensation between the external water source and the high-temperature and high-pressure gas to generate refrigerant, and then transport the refrigerant to the evaporator and the compressor;

[0019] One end of the pressure controller is connected to one end of the compressor, and the other end of the pressure controller is connected to the other end of the compressor. The pressure controller is used to perform overpressure protection on the compressor.

[0020] The pressure gauge is used to detect the refrigerant pressure of the refrigeration component.

[0021] Optionally, the refrigeration assembly further includes: a hot bypass solenoid valve, a regulating valve, a cold bypass solenoid valve and a cold bypass expansion valve;

[0022] The thermal bypass solenoid valve and the regulating valve are sequentially arranged between one end of the condenser and the first end of the evaporator;

[0023] The cold bypass solenoid valve and the cold bypass expansion valve are sequentially arranged between the drying filter and the other end of the compressor.

[0024] Optionally, the internal circulation heat exchange unit includes: a first water tank and an internal circulation water pump;

[0025] The first water outlet of the first water tank is connected to the third end of the evaporator, and the fourth end of the evaporator is connected to the first water inlet of the first water tank; the first water tank is used to contain liquid;

[0026] The internal circulation water pump is arranged between the first water outlet of the first water tank and the third end of the evaporator; the internal circulation water pump is used to realize the circulation of liquid between the first water tank and the evaporator. When the liquid flows through the evaporator, it exchanges heat with the refrigerant in the evaporator, thereby realizing the regulation of the temperature of the liquid.

[0027] Optionally, the external circulation heat exchange unit includes: an external circulation water pump, a first one-way valve and a filter;

[0028] The second water outlet of the first water tank is connected to the water inlet of the device to be cooled, and the water outlet of the device to be cooled is connected to the second water inlet of the first water tank;

[0029] The external circulation water pump is arranged between the second water outlet of the first water tank and the water inlet of the device to be cooled; the external circulation water pump is used to realize the circulation of liquid between the first water tank and the device to be cooled, and the liquid exchanges heat with the device to be cooled when flowing through the device to be cooled, thereby realizing cooling of the device to be cooled;

[0030] The first one-way valve is arranged between the external circulation water pump and the water inlet of the equipment to be cooled, and the first one-way valve is used to prevent the liquid from flowing back;

[0031] The filter is arranged between the water outlet of the device to be cooled and the second water inlet of the first water tank, and is used to filter impurities in the liquid.

[0032] Optionally, the ventilation assembly includes: an air source, a pressure reducing valve, and a second one-way valve;

[0033] The air outlet of the air source is connected to one end of the pressure reducing valve, and the other end of the pressure reducing valve is connected to the water inlet of the equipment to be cooled. The pressure reducing valve is used to adjust the ventilation volume of the air source;

[0034] The second one-way valve is arranged between the other end of the pressure reducing valve and the water inlet of the equipment to be cooled, and the second one-way valve is used to prevent liquid from entering the ventilation component.

[0035] Optionally, the detection assembly includes a second water tank and a pressure sensor;

[0036] The water inlet of the second water tank is connected to the water outlet of the tested product;

[0037] The pressure sensor is arranged at the water outlet of the product under test, and is used to detect the air tightness of the product under test.

[0038] According to another aspect of the utility model, a heat exchange system applied to a new energy offline test bench is provided, comprising a heat exchange device applied to a new energy offline test bench according to any embodiment of the utility model, and a controller electrically connected to the heat exchange device.

[0039] The technical solution of the embodiment of the utility model is to design the heat exchange device so that the heat exchange device includes a refrigeration component, a circulation component, a first test bench and a ventilation component. The refrigeration component is used to generate refrigerant, and no refrigerant needs to be added manually. The circulation component includes an internal circulation heat exchange unit and an external circulation heat exchange unit. The internal circulation heat exchange unit can use refrigerant to adjust the temperature of the liquid, thereby achieving precise control of the liquid temperature, thereby improving the cooling effect and saving energy consumption when the external circulation heat exchange unit uses liquid to cool the device to be cooled. Furthermore, the ventilation component can ventilate the device to be cooled after cooling the device to be cooled to discharge the residual liquid in the device to be cooled, thereby avoiding damage to the device to be cooled by the residual liquid in the device to be cooled. In addition, the device to be cooled can include different types of equipment, that is, the heat exchange device can realize cooling of different types of equipment, which solves the problem of the relatively single function of the heat exchange device.

[0040] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present utility model, nor are they intended to limit the scope of the present utility model. Other features of the present utility model will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0042] Figure 1 This is a schematic diagram of the structure of a heat exchange device applied to a new energy offline test bench provided by an embodiment of the utility model;

[0043] Figure 2 It is a structural schematic diagram of a heat exchange device for scheme 1 provided in an embodiment of the utility model;

[0044] Figure 3 It is a structural schematic diagram of a heat exchange device for scheme 2 provided in an embodiment of the utility model;

[0045] Figure 4 It is a structural schematic diagram of a heat exchange device for scheme 3 provided in an embodiment of the utility model;

[0046] Figure 5 It is a structural schematic diagram of another heat exchange device applied to a new energy offline test bench provided by an embodiment of the utility model.

[0047] Reference numerals:

[0048] 10-refrigeration component; 11-compressor; 12-condenser; 13-drying filter; 14-main solenoid valve; 15-main expansion valve; 16-evaporator; 17-pressure gauge; 18-pressure controller;

[0049] 20-circulation component; 21-internal circulation heat exchange unit; 22-external circulation heat exchange unit; 23-first water tank; 24-internal circulation water pump; 25-external circulation water pump; 26-first one-way valve; 27-filter;

[0050] 30-First test bench;

[0051] 40-ventilation assembly; 41-air source; 42-pressure reducing valve; 43-second one-way valve;

[0052] 50-detection component; 51-second water tank;

[0053] 60- Second test bench;

[0054] 71-hot bypass solenoid valve; 72-regulating valve; 73-cold bypass solenoid valve; 74-cold bypass expansion valve; 75-ball valve; 76-flow sensor; 77-angle valve;

[0055] T / C-temperature sensor; P / C-pressure sensor. DETAILED DESCRIPTION

[0056] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0057] It should be noted that the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the utility model described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0058] Figure 1 This is a schematic diagram of the structure of a heat exchange device used in a new energy offline test bench provided by an embodiment of the utility model. Figure 1 As shown, the heat exchange device includes: a refrigeration component 10 , a circulation component 20 , a first test bench 30 and a ventilation component 40 .

[0059] Among them, one refrigeration component 10 corresponds to one circulation component 20, and one circulation component 20 corresponds to one first test bench 30. That is to say, the number of refrigeration components 10, circulation components 20, and first test benches 30 is equal. The first test bench 30 is used to place the equipment to be cooled, and the equipment to be cooled may include different types of equipment. The number of ventilation components 40 is usually 1. In the utility model, the number of refrigeration components 10, circulation components 20, and first test benches 30 are all N, and N is a positive integer. That is, the heat exchange device can cool N equipment to be cooled at the same time. Of course, the cooling of each equipment to be cooled can be independently controlled.

[0060] The refrigeration component 10 is used to generate a refrigerant.

[0061] The circulation component 20 includes an internal circulation heat exchange unit 21 and an external circulation heat exchange unit 22. The internal circulation heat exchange unit 21 is connected to the corresponding refrigeration component 10, and the internal circulation heat exchange unit 21 is used to adjust the temperature of the liquid using a refrigerant. The external circulation heat exchange unit 22 is connected to the internal circulation heat exchange unit 21 and the corresponding device to be cooled placed on the first test bench 30, and the external circulation heat exchange unit 22 is used to cool the device to be cooled using a liquid. Since the refrigeration component 10 can generate refrigerant, it can continuously supply the internal circulation heat exchange unit 21 to adjust the temperature of the liquid, so that the liquid after the temperature adjustment can achieve heat exchange with the device to be cooled, thereby achieving the purpose of cooling the device to be cooled.

[0062] The ventilation component 40 is connected to the equipment to be cooled placed on the first test bench 30. Since the liquid flows into the interior of the equipment to be cooled to achieve heat exchange with the equipment to be cooled, after the equipment to be cooled is cooled, the ventilation component 40 ventilates the equipment to be cooled to discharge the residual liquid in the equipment to be cooled, thereby avoiding damage to the equipment to be cooled by the residual liquid.

[0063] In one embodiment, for a scenario where the heat exchange device is applied to a new energy offline test bench, the device to be cooled includes a product under test and / or a dynamometer. Typically, the product under test may be an engine / motor of a new energy vehicle, and the dynamometer is a device for measuring the performance of the product under test. When the device to be cooled includes the product under test and the dynamometer, there may be an electrical connection between the product under test and the dynamometer.

[0064] Since the equipment to be cooled includes the product to be tested and / or the dynamometer, the heat exchange device provided in the embodiment of the utility model can include three implementation schemes:

[0065] Solution 1: The equipment to be cooled only includes the product under test.

[0066] Figure 2 Schematic diagram of a heat exchange device for solution 1 provided in an embodiment of the present utility model. Figure 2 As shown, the heat exchange device includes: a refrigeration component 10, a circulation component 20, a first test bench 30, and a ventilation component 40. The circulation component 20 includes an internal circulation heat exchange unit 21 and an external circulation heat exchange unit 22. Since the first test bench 30 is used to place the product to be tested, the heat exchange device also includes: a detection component 50 and a second test bench 60. The second test bench 60 is used to place the product to be tested after the residual liquid is discharged.

[0067] The detection component 50 is connected to the product under test placed on the first test bench 30, and is used to cooperate with the ventilation component 40 to detect the air tightness of the product under test before cooling the product under test; the ventilation component 40 is also used to ventilate the product under test placed on the second test bench 60 to perform secondary discharge of the residual liquid in the product under test.

[0068] In this way, not only can the product under test be cooled, but also the air tightness and secondary drainage function of the product under test can be detected.

[0069] Solution 2: The equipment to be cooled only includes a dynamometer.

[0070] Figure 3 Schematic diagram of a heat exchange device for solution 2 provided by the embodiment of the utility model. Figure 3As shown, the heat exchange device includes: a refrigeration component 10, a circulation component 20, a first test bench 30, and a ventilation component 40. The circulation component 20 includes an internal circulation heat exchange unit 21 and an external circulation heat exchange unit 22. In this way, the dynamometer can be cooled, solving the problem that the existing test equipment cannot be cooled.

[0071] Solution 3: The equipment to be cooled includes the product under test and the dynamometer.

[0072] Figure 4 Schematic diagram of a heat exchange device for solution 3 provided by the embodiment of the utility model. Figure 4 As shown, the heat exchange device includes: two refrigeration components 10, two circulation components 20, two first test benches 30, and a ventilation component 40. The circulation component 20 includes an internal circulation heat exchange unit 21 and an external circulation heat exchange unit 22. One of the two first test benches 30 is used to place the product under test, and the other is used to place the dynamometer. Since one first test bench 30 is used to place the product under test, the heat exchange device also includes: a detection component 50 and a second test bench 60, and the detection component 50 and the second test bench 60 correspond to the first test bench 30 for placing the product under test. The second test bench 60 is used to place the product under test after the residual liquid is discharged.

[0073] The detection component 50 is connected to the product under test placed on the corresponding first test bench 30, and is used to cooperate with the ventilation component 40 to detect the air tightness of the product under test before cooling the product under test; the ventilation component 40 is also used to ventilate the product under test placed on the second test bench 60 to perform secondary discharge of the residual liquid in the product under test.

[0074] In this way, not only can the tested product and the dynamometer be cooled, but also the air tightness and secondary drainage function of the tested product can be detected.

[0075] In actual applications, a selection can be made from the above three methods according to actual needs (such as the type of equipment to be cooled, production cost, etc.), and the embodiments of the present utility model do not impose specific limitations on this.

[0076] Below, taking the heat exchange device shown in mode 3 as an example, the structures of the refrigeration component, the circulation component, the first test bench, the ventilation component, the detection component and the second test bench and their technical effects are described in detail. It can be understood that the heat exchange devices in the above other modes are similar to the description of the following embodiments of the utility model, and for the sake of brevity, they are not repeated here.

[0077] Figure 5 This is a schematic diagram of the structure of another heat exchange device used in a new energy offline test bench provided by the embodiment of the utility model. Figure 5As shown, the refrigeration assembly includes: a compressor 11, a condenser 12, a drying filter 13, a main solenoid valve 14, a main expansion valve 15, an evaporator 16, a pressure gauge 17 and a pressure controller 18.

[0078] One end of the compressor 11 is connected to one end of the condenser 12, the other end of the condenser 12 is connected to the first end of the evaporator 16, and the second end of the evaporator 16 is connected to the other end of the compressor 11. That is, a connected loop is formed among the compressor 11, the condenser 12 and the evaporator 16.

[0079] The compressor 11 is used to compress the refrigerant stored inside and discharge high-temperature and high-pressure gas to the condenser 12. The flow direction of the high-temperature and high-pressure gas is as follows: Figure 5 As shown by the arrow in . The condenser 12 is connected to an external water source (such as factory cooling water), and the condenser 12 is used to perform heat exchange and condensation between the external water source and the high-temperature and high-pressure gas to generate refrigerant, and then transport the refrigerant to the evaporator 16 and the compressor 11. In this way, the recycling production and utilization of the refrigerant is realized without the need for manual re-addition of refrigerant.

[0080] Specifically, the working principle of the compressor 11 is to suck in low-temperature and low-pressure refrigerant gas from the suction pipe, compress it by driving the piston through the operation of the motor, and then discharge high-temperature and high-pressure refrigerant gas to the exhaust pipe, providing power for the circulation inside the refrigeration component. The condenser 12 is a heat exchanger that can convert high-temperature and high-pressure refrigerant gas into liquid.

[0081] The filter drier 13, the main solenoid valve 14, and the main expansion valve 15 are sequentially arranged between the other end of the condenser 12 and the first end of the evaporator 16, that is, on the pipeline from the other end of the condenser 12 to the first end of the evaporator 16. The filter drier 13 is used to filter impurities, moisture, and acid components in the refrigeration component pipeline to protect the compressor 11. The main solenoid valve 14 is used to control the on-off of the pipeline. The main expansion valve 15 can play a role in throttling and reducing pressure.

[0082] One end of the pressure controller 18 is connected to one end of the compressor 11, and the other end of the pressure controller 18 is connected to the other end of the compressor 11. The pressure controller 17 is used to protect the compressor 11 from overpressure. The pressure controller 18 can also be called a high-low pressure controller, which can protect the high-pressure side and the low-pressure side of the compressor 11 from overpressure, and alarm when the pressure is higher than the high-pressure threshold / lower than the low-pressure threshold.

[0083] The pressure gauge 17 is used to detect the refrigerant pressure of the refrigeration component.

[0084] Optionally, the refrigeration component further includes: a hot bypass solenoid valve 71, a regulating valve 72, a cold bypass solenoid valve 73 and a cold bypass expansion valve 74. The hot bypass solenoid valve 71 and the regulating valve 72 are sequentially arranged between one end of the condenser 12 and the first end of the evaporator 16; the cold bypass solenoid valve 73 and the cold bypass expansion valve 74 are sequentially arranged between the drying filter 13 and the other end of the compressor 11. Under the condition of stable temperature control during the operation of the equipment, the excess refrigeration capacity of the compressor 11 can be offset by adjusting the opening time of the hot bypass solenoid valve 71 and / or the cold bypass solenoid valve 73, thereby achieving the effect of energy saving and consumption reduction.

[0085] In one embodiment, a temperature sensor T / C may be provided inside the compressor 11, and a pressure sensor P / C may be provided at the water inlet of the condenser 12 connected to the external water source. In addition, at least one temperature sensor T / C may be provided in the pipeline between the second end of the evaporator 16 and the other end of the compressor 11, or the pipeline between the second end of the evaporator 16 and the other end of the compressor 11 may have a temperature monitoring function.

[0086] The internal circulation heat exchange unit includes: a first water tank 23 and an internal circulation water pump 24 .

[0087] The first water outlet of the first water tank 23 is communicated with the third end of the evaporator 16 , and the fourth end of the evaporator 16 is communicated with the first water inlet of the first water tank 23 ; the first water tank 23 is used to contain liquid.

[0088] The internal circulation water pump 24 is arranged between the first water outlet of the first water tank 23 and the third end of the evaporator 16; the internal circulation water pump 24 is used to realize the circulation of liquid between the first water tank 23 and the evaporator 16. When the liquid flows through the evaporator 16, it exchanges heat with the refrigerant in the evaporator 16, thereby realizing the regulation of the temperature of the liquid.

[0089] Specifically, a ball valve 75 may be provided on the pipeline between the internal circulation water pump 24 and the first water outlet of the first water tank 23, and the ball valve 75 may control the opening and closing of the pipeline.

[0090] The external circulation heat exchange unit includes: an external circulation water pump 25 , a first one-way valve 26 and a filter 27 .

[0091] The second water outlet of the first water tank 23 is connected to the water inlet of the device to be cooled, and the water outlet of the device to be cooled is connected to the second water inlet of the first water tank 23. That is, a connected loop is formed between the first water tank 23 and the device to be cooled.

[0092] The external circulation water pump 25 is arranged between the second water outlet of the first water tank 23 and the water inlet of the equipment to be cooled; the external circulation water pump 25 is used to realize the circulation of liquid between the first water tank 23 and the equipment to be cooled. When the liquid flows through the equipment to be cooled, it exchanges heat with the equipment to be cooled, thereby cooling the equipment to be cooled.

[0093] In one embodiment, a liquid level switch may be provided in the first water tank 23 to detect the liquid level in the first water tank 23, so that liquid can be added to the first water tank 23 when the liquid level in the first water tank 23 is too low, thereby avoiding poor cooling effect caused by lack of water. In addition, a heating pipe may be provided in the first water tank 23, and the heating pipe may heat the liquid to achieve accurate adjustment of the liquid temperature. The first water tank 23 also has a drain valve.

[0094] The first one-way valve 26 is arranged between the external circulation water pump 25 and the water inlet of the device to be cooled, and the first one-way valve is used to prevent the liquid from flowing back; the filter 27 is arranged between the water outlet of the device to be cooled and the second water inlet of the first water tank 23, and the filter is used to filter impurities in the liquid.

[0095] In one embodiment, a ball valve 75 may be provided between the second water outlet of the first water tank 23 and the external circulation water pump 25 to control the opening and closing of the pipeline. At least one of a temperature sensor T / C, a pressure sensor P / C, a flow sensor 76, an angle valve 77, and a ball valve 75 may be provided on the pipeline between the external circulation water pump 25 and the water inlet of the device to be cooled.

[0096] The ventilation assembly includes: an air source 41 , a pressure reducing valve 42 and a second one-way valve 43 .

[0097] The air outlet of the air source 41 is connected to one end of the pressure reducing valve 42, and the other end of the pressure reducing valve 42 is connected to the water inlet of the device to be cooled. The pressure reducing valve 42 is used to adjust the ventilation volume of the air source 41. The second one-way valve 43 is arranged between the other end of the pressure reducing valve 42 and the water inlet of the device to be cooled, and the second one-way valve 43 is used to prevent liquid from entering the ventilation component.

[0098] In one embodiment, a ball valve 75 may be provided between the air outlet of the air source 41 and one end of the pressure reducing valve 42, and at least one of an angle valve 77, a ball valve 75, a temperature sensor T / C, and a pressure sensor P / C may be provided between the other end of the pressure reducing valve 42 and the water inlet of the equipment to be cooled.

[0099] The detection assembly includes a second water tank 51 and a pressure sensor P / C.

[0100] The water inlet of the second water tank 51 is connected to the water outlet of the product under test; the pressure sensor P / C is arranged at the water outlet of the product under test, and the pressure sensor P / C is used to detect the air tightness of the product under test.

[0101] In one embodiment, at least one of a filter 27 , an angle valve 77 , and a ball valve 75 may be provided between the water inlet of the second water tank 51 and the water outlet of the product to be tested.

[0102] In addition, a temperature sensor T / C may be provided at the second water inlet of the first water tank 23 to detect the temperature of water flowing into the first water tank 23 .

[0103] When cooling the tested product, the tested product is first placed on the first test bench 30. After the air tightness test of the tested product is completed, the tested product is cooled on the first test bench 30 and the liquid remaining in the device to be cooled is discharged after cooling. The tested product is then transferred to the second test bench 60, and the liquid remaining in the tested product is discharged for a second time on the second test bench 60.

[0104] The technical solution of the embodiment of the utility model is to design the heat exchange device so that the heat exchange device includes a refrigeration component, a circulation component, a first test bench and a ventilation component. The refrigeration component is used to generate refrigerant, and no refrigerant needs to be added manually. The circulation component includes an internal circulation heat exchange unit and an external circulation heat exchange unit. The internal circulation heat exchange unit can use refrigerant to adjust the temperature of the liquid, thereby achieving precise control of the liquid temperature, thereby improving the cooling effect and saving energy consumption when the external circulation heat exchange unit uses liquid to cool the device to be cooled. Furthermore, the ventilation component can ventilate the device to be cooled after cooling the device to be cooled to discharge the residual liquid in the device to be cooled, thereby avoiding damage to the device to be cooled by the residual liquid in the device to be cooled. In addition, the device to be cooled can include different types of equipment, that is, the heat exchange device can realize cooling of different types of equipment, which solves the problem of the relatively single function of the heat exchange device.

[0105] An embodiment of the utility model also provides a heat exchange system applied to a new energy offline test bench, the heat exchange system comprising any of the above-mentioned heat exchange devices applied to a new energy offline test bench, and a controller electrically connected to the heat exchange device.

[0106] The heat exchange device works under the control of a controller, which may be a PID controller.

[0107] The above specific implementations do not constitute a limitation on the protection scope of the present utility model. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A heat exchange device used in a new energy offline test bench, characterized in that: include: A refrigeration component, a circulation component, a first test bench and a ventilation component, wherein one refrigeration component corresponds to one circulation component, one circulation component corresponds to one first test bench, and the first test bench is used to place the equipment to be cooled; The refrigeration component is used to generate refrigerant; The circulation component includes an internal circulation heat exchange unit and an external circulation heat exchange unit; the internal circulation heat exchange unit is connected to the corresponding refrigeration component, and is used to adjust the temperature of the liquid by using the refrigerant; the external circulation heat exchange unit is respectively connected to the internal circulation heat exchange unit and the corresponding device to be cooled, and is used to cool the device to be cooled by using the liquid; The ventilation component is in communication with the device to be cooled, and is used to ventilate the device to be cooled after cooling the device to be cooled, so as to discharge the liquid remaining in the device to be cooled.

2. The heat exchange device applied to the new energy offline test bench according to claim 1 is characterized in that: The equipment to be cooled includes a product to be tested and / or a dynamometer; When the equipment to be cooled includes a product to be tested, the heat exchange device further includes: a detection component and a second test bench, a first test bench for placing the product to be tested corresponds to one detection component and one second test bench, and the second test bench is used to place the product to be tested after the residual liquid is discharged; The detection component is in communication with the corresponding product to be tested, and is used to cooperate with the ventilation component to detect the air tightness of the product to be tested before cooling the product to be tested; The ventilation assembly is also used to ventilate the product under test placed on the second test bench to perform secondary discharge of the liquid remaining in the product under test.

3. The heat exchange device applied to the new energy offline test bench according to claim 2 is characterized in that: The number of the refrigeration components, the number of the circulation components, and the number of the first test benches are all 2, and the number of the ventilation components is 1; One of the first test benches is used for placing the product under test, and another of the first test benches is used for placing the dynamometer.

4. The heat exchange device applied to the new energy offline test bench according to claim 2 or 3, characterized in that: The refrigeration assembly includes: a compressor, a condenser, a drying filter, a main solenoid valve, a main expansion valve, an evaporator, a pressure gauge and a pressure controller; One end of the compressor is connected to one end of the condenser, and the compressor is used to compress the refrigerant stored inside and discharge high-temperature and high-pressure gas to the condenser; The other end of the condenser is communicated with the first end of the evaporator, and the second end of the evaporator is communicated with the other end of the compressor; the drying filter, the main solenoid valve, and the main expansion valve are sequentially arranged between the other end of the condenser and the first end of the evaporator; The condenser is connected to an external water source; the condenser is used to perform heat exchange and condensation on the external water source and the high-temperature and high-pressure gas to generate the refrigerant, and transport the refrigerant to the evaporator and the compressor; One end of the pressure controller is connected to one end of the compressor, and the other end of the pressure controller is connected to the other end of the compressor, and the pressure controller is used to perform overpressure protection on the compressor; The pressure gauge is used to detect the refrigerant pressure of the refrigeration component.

5. The heat exchange device applied to the new energy offline test bench according to claim 4 is characterized in that: The refrigeration assembly further includes: a hot bypass solenoid valve, a regulating valve, a cold bypass solenoid valve and a cold bypass expansion valve; The thermal bypass solenoid valve and the regulating valve are sequentially arranged between one end of the condenser and the first end of the evaporator; The cold bypass solenoid valve and the cold bypass expansion valve are sequentially arranged between the drying filter and the other end of the compressor.

6. The heat exchange device applied to the new energy offline test bench according to claim 4 is characterized in that: The internal circulation heat exchange unit comprises: a first water tank and an internal circulation water pump; The first water outlet of the first water tank is communicated with the third end of the evaporator, and the fourth end of the evaporator is communicated with the first water inlet of the first water tank; the first water tank is used to contain the liquid; The internal circulation water pump is arranged between the first water outlet of the first water tank and the third end of the evaporator; the internal circulation water pump is used to realize the circulation of the liquid between the first water tank and the evaporator, and the liquid exchanges heat with the refrigerant in the evaporator when flowing through the evaporator, thereby realizing the regulation of the temperature of the liquid.

7. The heat exchange device used in the new energy offline test bench according to claim 6 is characterized in that: The external circulation heat exchange unit comprises: an external circulation water pump, a first one-way valve and a filter; The second water outlet of the first water tank is in communication with the water inlet of the device to be cooled, and the water outlet of the device to be cooled is in communication with the second water inlet of the first water tank; The external circulation water pump is arranged between the second water outlet of the first water tank and the water inlet of the device to be cooled; the external circulation water pump is used to realize the circulation of the liquid between the first water tank and the device to be cooled, and the liquid exchanges heat with the device to be cooled when flowing through the device to be cooled, thereby realizing cooling of the device to be cooled; The first one-way valve is arranged between the external circulation water pump and the water inlet of the device to be cooled, and the first one-way valve is used to prevent the liquid from flowing back; The filter is arranged between the water outlet of the device to be cooled and the second water inlet of the first water tank, and the filter is used to filter impurities in the liquid.

8. The heat exchange device used in the new energy offline test bench according to claim 7 is characterized in that: The ventilation assembly comprises: an air source, a pressure reducing valve and a second one-way valve; The air outlet of the air source is communicated with one end of the pressure reducing valve, and the other end of the pressure reducing valve is communicated with the water inlet of the device to be cooled, and the pressure reducing valve is used to adjust the ventilation volume of the air source; The second one-way valve is arranged between the other end of the pressure reducing valve and the water inlet of the device to be cooled, and the second one-way valve is used to prevent the liquid from entering the ventilation component.

9. The heat exchange device used in the new energy offline test bench according to claim 8 is characterized in that: The detection assembly includes a second water tank and a pressure sensor; The water inlet of the second water tank is connected to the water outlet of the tested product; The pressure sensor is arranged at the water outlet of the tested product, and the pressure sensor is used to detect the air tightness of the tested product.

10. A heat exchange system applied to a new energy offline test bench, characterized in that: It comprises a heat exchange device applied to a new energy offline test bench as described in any one of claims 1 to 9, and a controller electrically connected to the heat exchange device.

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