Non-frosting constant temperature equipment for battery test

Abstract

The utility model provides non-frosting constant temperature equipment for battery testing, which comprises a constant temperature box, the interior of the constant temperature box is in a vacuum state, an evaporator and a heater are arranged in the constant temperature box, and an outlet of the evaporator is connected with an inlet end of a first channel of a heat regenerator. The outlet end of a first channel of the heat regenerator is sequentially connected with the compressor, the oil separator, the fin condenser and the drying filter, and the outlet end of the drying filter is connected with the inlet end of a first channel of the economizer and the inlet end of the liquid spraying capillary tube at the same time. A first channel outlet end of the economizer is connected with a second channel inlet end of the heat regenerator through a first electronic expansion valve, and a second channel outlet end of the heat regenerator is connected with an inlet end of the evaporator. The outlet end of the liquid spraying capillary tube is connected with the inlet end of a second channel of the economizer, and the outlet end of the second channel of the economizer is connected with the inlet end of the compressor. According to the utility model, the thermotank is vacuumized, and the pipeline structure of the thermostatic equipment is reasonably designed, so that frosting can be prevented.

Description

Technical Field

[0001] The utility model relates to a temperature control device, in particular to a non-frost constant temperature device for battery testing. Background Art

[0002] In the battery testing of new energy vehicles, constant temperature equipment plays an important role in ensuring battery performance. Constant temperature equipment can provide accurate temperature to evaluate the performance and stability of the battery under different environmental conditions, thereby ensuring the performance and reliability of the battery.

[0003] However, the current thermostatic device will frost during operation, which will endanger the safety of the thermostatic device. The formation of frost blocks the contact between the evaporator surface and the air, and adds a layer of thermal resistance between the evaporator surface and the air, which reduces the heat exchange capacity; the formation of frost increases the pressure drop of the evaporator, reduces the air flow that can take away the cold, and reduces the cooling capacity, which in turn cannot provide a constant temperature environment. As a result, during the test of battery products, the performance of the battery cannot be accurately detected, and the battery is prone to explosion. Therefore, it is necessary to provide a non-frost thermostatic device for battery testing. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art and provide a frosting-free constant temperature device for battery testing. The constant temperature device of the utility model evacuates the constant temperature box, so that the constant temperature box is in a vacuum state, which can prevent frosting. In addition, the utility model reasonably designs the pipeline structure of the constant temperature device, and during the refrigeration process, the hot air is led to the outside of the constant temperature box in a bypass form, which can reduce energy consumption and reduce frosting.

[0005] In order to achieve the above technical objectives, the technical solution adopted by the embodiment of the utility model is:

[0006] A non-frost constant temperature device for battery testing, comprising a constant temperature box, the constant temperature box is in a vacuum state, an evaporator and a heater are arranged in the constant temperature box, the heater is used to heat the constant temperature box, the outlet of the evaporator is connected to the inlet end of the first channel of the regenerator, the outlet end of the first channel of the regenerator is connected to the inlet end of the compressor, the outlet end of the compressor is connected to the inlet end of the oil separator through a pipeline, the outlet end of the oil separator is connected to the inlet end of the fin condenser through a pipeline, the outlet end of the fin condenser is connected to the inlet end of the drying filter through a pipeline, the outlet end of the drying filter is simultaneously connected to the inlet end of the first channel of the economizer and the inlet end of the liquid spray capillary, the outlet end of the first channel of the economizer is connected to the inlet end of the first electronic expansion valve, the outlet end of the first electronic expansion valve is connected to the inlet end of the second channel of the regenerator, and the outlet end of the second channel of the regenerator is connected to the inlet end of the evaporator;

[0007] The outlet end of the liquid spray capillary is connected to the inlet end of the second channel of the economizer, and the outlet end of the second channel of the economizer is connected to the inlet end of the compressor.

[0008] Furthermore, a return pipeline is provided between the outlet end of the oil separator and the inlet end of the compressor.

[0009] Furthermore, a second electronic expansion valve is provided between the outlet end of the oil separator and the outlet end of the first electronic expansion valve.

[0010] Furthermore, the thermostatic box is provided with a main temperature sensor and an auxiliary temperature sensor for detecting the temperature inside the thermostatic box.

[0011] Furthermore, a third temperature sensor for detecting the intake temperature is provided between the regenerator and the compressor, and a fourth temperature sensor for detecting the exhaust temperature is provided between the compressor and the oil separator.

[0012] Furthermore, a first pressure sensor for detecting suction pressure is provided between the evaporator and the regenerator, and a second pressure sensor for detecting exhaust pressure is provided between the compressor and the oil separator.

[0013] Furthermore, the heater adopts one or more heating methods selected from the group consisting of PTC thermistor electric heating, electric heating, steam pipe heating and semiconductor refrigeration heating.

[0014] The beneficial effects brought by the technical solution provided by the embodiment of the utility model are:

[0015] The thermostatic device of the utility model evacuates the thermostatic box, so that the thermostatic box is in a vacuum state, which can prevent frost. In addition, the utility model reasonably designs the pipeline structure of the thermostatic device, and guides the hot air to the outside of the thermostatic box in a bypass form during the refrigeration process, which can reduce energy consumption and reduce frost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the planar distribution structure of the constant temperature device in the embodiment of the utility model.

[0017] Explanation of the accompanying drawings: 1-evaporator; 2-heater; 3-regenerator; 4-compressor; 5-oil separator; 6-fin condenser; 7-drying filter; 8-first electronic expansion valve; 9-economizer; 10-second electronic expansion valve; 11-liquid injection capillary; 12-main temperature sensor; 13-auxiliary temperature sensor; 14-third temperature sensor; 15-fourth temperature sensor; 16-first pressure sensor; 17-second pressure sensor. DETAILED DESCRIPTION

[0018] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "inside, outside", "up, down", "left, right", etc. are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0019] 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. Example 1

[0020] like Figure 1 As shown, a non-frost constant temperature device for battery testing includes a constant temperature box, the constant temperature box is in a vacuum state, an evaporator 1 and a heater 2 are arranged in the constant temperature box, the heater 2 is used to heat the constant temperature box, the outlet of the evaporator 1 is connected to the inlet end of the first channel of the regenerator 3, the outlet end of the first channel of the regenerator 3 is connected to the inlet end of the compressor 4, the outlet end of the compressor 4 is connected to the inlet end of the oil separator 5 through a pipeline, the outlet end of the oil separator 5 is connected to the inlet end of the fin condenser 6 through a pipeline, the outlet end of the fin condenser 6 is connected to the inlet end of the drying filter 7 through a pipeline, the outlet end of the drying filter 7 is connected to the inlet end of the first channel of the economizer 9 and the inlet end of the liquid spray capillary 11 at the same time, the outlet end of the first channel of the economizer 9 is connected to the inlet end of the first electronic expansion valve 8, the outlet end of the first electronic expansion valve 8 is connected to the inlet end of the second channel of the regenerator 3, and the outlet end of the second channel of the regenerator 3 is connected to the inlet end of the evaporator 1;

[0021] The outlet end of the liquid spray capillary 11 is connected to the inlet end of the second channel of the economizer 9 , and the outlet end of the second channel of the economizer 9 is connected to the inlet end of the compressor 4 .

[0022] A reflux pipeline is provided between the outlet end of the oil separator 5 and the inlet end of the compressor 4. The oil separator 5 separates the lubricating oil in the high-pressure steam discharged from the refrigeration compressor 4 and then returns the high-pressure steam to the compressor 4 to avoid affecting the refrigeration effect.

[0023] A second electronic expansion valve 10 is provided between the outlet end of the oil separator 5 and the outlet end of the first electronic expansion valve 8. The second electronic expansion valve 10 is a thermostatic valve. A portion of the high-pressure steam from the oil separator 5 directly enters the second channel of the regenerator 3 from the second electronic expansion valve 10, and mixes with the gas-liquid two-phase mixture that enters the second channel of the regenerator 3 through the first electronic expansion valve 8. After gas-liquid heat exchange in the regenerator 3, the subcooled liquid enters the evaporator 1, and the superheated steam flows back to the compressor 4.

[0024] The thermostat is provided with a main temperature sensor 12 and an auxiliary temperature sensor 13 for detecting the temperature inside the thermostat. The dual temperature sensors can more accurately control the temperature inside the thermostat.

[0025] A third temperature sensor 14 for detecting the intake air temperature is provided between the regenerator 3 and the compressor 4 , and a fourth temperature sensor 15 for detecting the exhaust air temperature is provided between the compressor 4 and the oil separator 5 .

[0026] A first pressure sensor 16 for detecting suction pressure is provided between the evaporator 1 and the regenerator 3 , and a second pressure sensor 17 for detecting exhaust pressure is provided between the compressor 4 and the oil separator 5 .

[0027] The heater 2 adopts one or more heating methods of PTC thermistor electric heating, electric heating, steam pipe heating and semiconductor refrigeration heating.

[0028] The thermostatic device of the utility model leads hot air to the outside of the thermostatic box in a bypass form for cooling, wherein except for the evaporator 1, the heater 2, the main temperature sensor 12 and the auxiliary temperature sensor 13, the other components in the thermostatic device (the components represented by the numbers 3-11 and 14-17) are all arranged outside the thermostatic box, which can reduce the energy consumption of the refrigeration system and reduce the cost.

[0029] Specifically, the outlet of the evaporator 1 is connected to the inlet end of the air inlet passage of the regenerator 3, and the outlet end of the air inlet passage of the regenerator 3 is connected to the inlet end of the compressor 4. The gas enters the oil separator 5 after being compressed by the compressor 4. The compressor 4 compresses the gaseous refrigerant with a lower temperature refluxed from the evaporator 1 to form a gaseous refrigerant with a higher temperature and outputs it. The lubricating oil mixed in the refrigerant is separated in the oil separator 5 to avoid affecting the refrigeration effect. Then, the gaseous refrigerant with a higher temperature enters the fin condenser 6 to be cooled and condensed into a high-pressure liquid; After the impurities are filtered out by the drying filter 7, a part of the pressurized liquid refrigerant enters the economizer 9 through the inlet end of the first channel, and the other part flows through the liquid spray capillary 11 and adiabatically expands to become a gas-liquid two-phase mixture, and enters the economizer 9 from the inlet end of the second channel to achieve heat exchange. The gas enters the compressor 4 from the outlet end of the second channel of the economizer 9, and the liquid flows back to the liquid inlet channel of the regenerator 3 after adiabatically expanding through the first electronic expansion valve 8 from the outlet end of the first channel of the economizer 9, and flows back to the evaporator 1 from the outlet of the liquid inlet channel.

[0030] The thermostat of the utility model is connected to a vacuum pump, and the vacuum pump is used to evacuate the thermostat so that the interior of the thermostat is in a vacuum state, which can prevent frost. In addition, the utility model reasonably designs the pipeline structure of the thermostat device, and during the refrigeration process, the hot air is led to the outside of the thermostat in a bypass form, which can reduce energy consumption and reduce frost.

[0031] 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. A non-frost constant temperature device for battery testing, comprising a constant temperature box, characterized in that: The thermostatic box is in a vacuum state. An evaporator (1) and a heater (2) are provided in the thermostatic box. The heater (2) is used to heat the thermostatic box. The outlet of the evaporator (1) is connected to the inlet end of the first channel of the regenerator (3). The outlet end of the first channel of the regenerator (3) is connected to the inlet end of the compressor (4). The outlet end of the compressor (4) is connected to the inlet end of the oil separator (5) via a pipeline. The outlet end of the oil separator (5) is connected to the inlet end of the fin condenser (6) via a pipeline. The outlet end of the finned condenser (6) is connected to the inlet end of the drying filter (7) through a pipeline, the outlet end of the drying filter (7) is simultaneously connected to the inlet end of the first channel of the economizer (9) and the inlet end of the liquid spraying capillary (11), the outlet end of the first channel of the economizer (9) is connected to the inlet end of the first electronic expansion valve (8), the outlet end of the first electronic expansion valve (8) is connected to the inlet end of the second channel of the regenerator (3), and the outlet end of the second channel of the regenerator (3) is connected to the inlet end of the evaporator (1); The outlet end of the liquid spray capillary (11) is connected to the inlet end of the second channel of the economizer (9), and the outlet end of the second channel of the economizer (9) is connected to the inlet end of the compressor (4).

2. The non-frost constant temperature device for battery testing according to claim 1, characterized in that: A return pipeline is provided between the outlet end of the oil separator (5) and the inlet end of the compressor (4).

3. The non-frost constant temperature device for battery testing according to claim 1, characterized in that: A second electronic expansion valve (10) is provided between the outlet end of the oil separator (5) and the outlet end of the first electronic expansion valve (8).

4. The non-frost constant temperature equipment for battery testing according to claim 1, characterized in that: The thermostatic box is provided with a main temperature sensor (12) and an auxiliary temperature sensor (13) for detecting the temperature inside the thermostatic box.

5. The non-frost constant temperature equipment for battery testing according to claim 1, characterized in that: A third temperature sensor (14) for detecting the intake temperature is provided between the regenerator (3) and the compressor (4), and a fourth temperature sensor (15) for detecting the exhaust temperature is provided between the compressor (4) and the oil separator (5).

6. The non-frost constant temperature device for battery testing according to claim 1, characterized in that: A first pressure sensor (16) for detecting suction pressure is provided between the evaporator (1) and the regenerator (3), and a second pressure sensor (17) for detecting exhaust pressure is provided between the compressor (4) and the oil separator (5).

7. The non-frost constant temperature device for battery testing according to any one of claims 1 to 6, characterized in that: The heater (2) adopts one or more heating methods selected from the group consisting of PTC thermistor electric heating, electric heating, steam pipe heating and semiconductor refrigeration heating.

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