Testing equipment for high and low temperature testing machine
By designing a high and low temperature test machine test equipment containing multiple heat exchange devices, the problems of insufficient cooling capacity and liquid hitting in existing equipment under low temperature conditions are solved, and more efficient refrigeration and higher equipment reliability are achieved .
Patent Information
- Application Number
- CN202421149804.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-05-24
AI Technical Summary
When the existing high and low temperature test machines are at minus 40 degrees Celsius, there is insufficient low temperature refrigeration capacity or incomplete evaporation, resulting in the compressor's liquid return and liquid strike.
A test equipment including a compressor, oil and gas separator, gas and liquid separator, condenser, liquid reservoir, drying filter, plate heat exchanger and thermal expansion valve were designed to pass the temperature reduction after the evaporator and condenser The temperature is reduced, heat exchange is realized, the refrigeration capacity of the compressor is increased, and the return air temperature is increased to prevent liquid shock.
At -40℃, the refrigeration capacity of the compressor is effectively increased, the return air temperature is increased, the compressor liquid strike is avoided, and the equipment is improved.
Smart Images
Figure CN222438616U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of high and low temperature testing machine testing equipment, in particular to a testing equipment used for a high and low temperature testing machine. Background Art
[0002] High and low temperature testing machine is usually a commonly used testing equipment. High and low temperature testing can put the product in a high temperature and constant temperature condition to inspect its changes. High and low temperature testing machine has a wide range of uses.
[0003] When the high and low temperature test machine of the prior art is used, a compressor is usually used. During the use of the high and low temperature test machine, when the high and low temperature test machine is at minus 40 degrees Celsius, there will be insufficient low-temperature refrigeration capacity or incomplete evaporation, which will lead to liquid return problems in the compressor and liquid hammer phenomenon in the compressor, which has certain limitations. Utility Model Content
[0004] The purpose of the utility model is to provide a testing device for a high and low temperature testing machine to solve the problems raised in the above background technology.
[0005] To achieve the above purpose, the utility model provides the following technical solution: a test device for a high and low temperature test machine, comprising:
[0006] A compressor, wherein an oil-gas separator is provided on one side of the compressor;
[0007] A gas-liquid separator is provided on the other side of the compressor, a condenser is provided on one side of the compressor, a liquid storage tank is fixedly sleeved on one end of the condenser, a drying filter is fixedly connected to the end of the liquid storage tank, a first plate heat exchanger is provided on the end of the drying filter, and a thermal expansion valve is provided on the side of the first plate heat exchanger.
[0008] Preferably, a high-pressure gauge is provided on one side of the oil-gas separator, a low-pressure gauge is provided on one side of the gas-liquid separator, a pressure control switch is provided between the high-pressure gauge and the low-pressure gauge, one side of the gas-liquid separator is connected to the first plate heat exchanger, and a first temperature sensor is provided between the gas-liquid separator and the compressor.
[0009] Preferably, a refrigeration solenoid valve is fixedly sleeved on the bottom of the first plate heat exchanger, one side of the refrigeration solenoid valve is connected to the thermal expansion valve, the top of the first plate heat exchanger is connected to the second plate heat exchanger, an evaporator is arranged at the bottom of the second plate heat exchanger, one side of the evaporator is connected to the thermal expansion valve, a bypass solenoid valve is arranged between the evaporator and the thermal expansion valve, and one end of the bypass solenoid valve is connected to the connection between the condenser and the oil-gas separator.
[0010] Preferably, a circulating water tank is provided on the side of the second plate heat exchanger, and a first liquid level switch and a second liquid level switch are provided between the circulating water tank and the second plate heat exchanger.
[0011] Preferably, a second temperature sensor is provided on the side of the circulating water tank, a liquid filling port is provided on the top of the circulating water tank, and a heater is inserted and connected to the side of the circulating water tank.
[0012] Preferably, a first circulating pump is arranged between the circulating water tank and the evaporator, a second circulating pump is fixedly installed at the bottom of the circulating water tank, and a flow sensor, a first pressure sensor, a third temperature sensor and a second pressure sensor are arranged between the second circulating pump and the circulating water tank.
[0013] Technical effects and advantages of the utility model:
[0014] The utility model utilizes the mutual cooperation of the compressor, the gas-liquid separator, the condenser, the liquid storage tank, the drying filter, the first plate heat exchanger and the thermal expansion valve. At -40°C, the temperature after passing through the evaporator is -35-40°C and the temperature after the condenser is 20-30°C. The condensation temperature is lowered through heat exchange through the plate heat exchanger, which is beneficial to increase the refrigeration capacity of the compressor, and is beneficial to increase the return air temperature of the compressor, so as to prevent the compressor from liquid hammering. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic diagram of the overall frame structure of the high and low temperature testing equipment of the utility model.
[0016] Figure 2 This is a schematic diagram of the frame structure of the heater of the utility model.
[0017] Figure 3 This is a schematic diagram of the structure of the condenser of the utility model.
[0018] In the figure: 1. compressor; 2. oil-gas separator; 3. pressure control switch; 4. high pressure gauge; 5. low pressure gauge; 6. first temperature sensor; 7. gas-liquid separator; 8. second plate heat exchanger; 9. first liquid level switch; 10. second liquid level switch; 11. liquid filling port; 12. circulating water tank; 13. second pressure sensor; 14. third temperature sensor; 15. condenser; 16. liquid storage tank; 17. drying filter; 18. first plate heat exchanger; 19. refrigeration solenoid valve; 20. bypass solenoid valve; 21. thermal expansion valve; 22. evaporator; 23. first circulation pump; 24. heater; 25. second circulation pump; 26. second temperature sensor; 27. flow sensor; 28. first pressure sensor. DETAILED DESCRIPTION
[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0020] The utility model provides Figure 1-3 A test device for a high and low temperature test machine shown in the figure includes a compressor 1, and an oil-gas separator 2 is arranged on one side of the compressor 1. The oil-gas separator 2 is conducive to effectively separating gas and liquid, which is conducive to preventing pipeline blockage, protecting equipment, improving product quality and reducing energy consumption, etc. A high-pressure gauge 4 is arranged on one side of the oil-gas separator 2, and a low-pressure gauge 5 is arranged on one side of the gas-liquid separator 7. A pressure control switch 3 is arranged between the high-pressure gauge 4 and the low-pressure gauge 5. The pressure control switch 3 is conducive to controlling the pressure of the compressor 1. One side of the gas-liquid separator 7 is connected to the first plate heat exchanger 18, and a first temperature sensor 6 is arranged between the gas-liquid separator 7 and the compressor 1, which is conducive to monitoring the separation temperature.
[0021] Furthermore, a gas-liquid separator 7 is provided on the other side of the compressor 1, and the gas-liquid separator 7 is conducive to separating gas and liquid. A condenser 15 is provided on one side of the compressor 1, and the condenser 15 is conducive to condensing the high-temperature and high-pressure gas generated by the compressor 1, so that the liquid at normal temperature and high pressure is stored in the liquid storage tank 16. One end of the condenser 15 is fixedly connected with the liquid storage tank 16, which is conducive to storing the condensed normal temperature and high pressure liquid for subsequent use. The end of the liquid storage tank 16 is fixedly connected with a drying filter 17, and the drying filter 17 is conducive to condensing the high-pressure gas. The gas after drying and filtering is provided at the end of the drying filter 17. The first plate heat exchanger 18 is beneficial to heat exchange treatment of the gas. The first plate heat exchanger 18 is beneficial to heat exchange, so as to reduce the condensation temperature, thereby increasing the cooling capacity of the compressor 1, and is beneficial to increasing the return air temperature of the compressor 1, so as to prevent the compressor 1 from having liquid hammer. A thermal expansion valve 21 is provided on the side of the first plate heat exchanger 18. The thermal expansion valve 21 is beneficial to allow the low-temperature and low-pressure refrigerant after throttling to enter the interior of the evaporator 22.
[0022] Specifically, a refrigeration solenoid valve 19 is fixedly sleeved on the bottom of the first plate heat exchanger 18, and the refrigeration solenoid valve 19 is conducive to refrigeration operation of the gas. One side of the refrigeration solenoid valve 19 is connected to the thermal expansion valve 21. The top of the first plate heat exchanger 18 is connected to the second plate heat exchanger 8, and the second plate heat exchanger 8 is conducive to re-heat exchange treatment of the gas. An evaporator 22 is arranged at the bottom of the second plate heat exchanger 8, and the evaporator 22 is conducive to evaporation treatment of the gas. One side of the evaporator 22 is connected to the thermal expansion valve 21. A bypass solenoid valve 20 is arranged between the evaporator 22 and the thermal expansion valve 21, and one end of the bypass solenoid valve 20 is connected to the connection between the condenser 15 and the oil-gas separator 2.
[0023] More specifically, a circulating water tank 12 is provided on the side of the second plate heat exchanger 8, and the circulating water tank 12 is conducive to circulating water. A first liquid level switch 9 and a second liquid level switch 10 are provided between the circulating water tank 12 and the second plate heat exchanger 8. A second temperature sensor 26 is provided on the side of the circulating water tank 12, and the second temperature sensor 26 is conducive to monitoring the temperature of water inside the circulating water tank 12. A liquid filling port 11 is provided on the top of the circulating water tank 12, and a heater 24 is connected to the side of the circulating water tank 12. A first circulating pump 23 is provided between the circulating water tank 12 and the evaporator 22. A second circulating pump 25 is fixedly installed at the bottom of the circulating water tank 12, and a flow sensor 27, a first pressure sensor 28, a third temperature sensor 14 and a second pressure sensor 13 are provided between the second circulating pump 25 and the circulating water tank 12.
[0024] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A test device for a high and low temperature test machine, comprising: A compressor (1), wherein an oil-gas separator (2) is provided on one side of the compressor (1); The invention is characterized in that a gas-liquid separator (7) is provided on the other side of the compressor (1), a condenser (15) is provided on one side of the compressor (1), one end of the condenser (15) is fixedly sleeved with a liquid storage tank (16), an end of the liquid storage tank (16) is fixedly connected with a drying filter (17), a first plate heat exchanger (18) is provided at the end of the drying filter (17), and a thermal expansion valve (21) is provided on the side of the first plate heat exchanger (18).
2. The testing device for a high and low temperature testing machine according to claim 1, characterized in that: A high-pressure gauge (4) is provided on one side of the oil-gas separator (2), a low-pressure gauge (5) is provided on one side of the gas-liquid separator (7), a pressure control switch (3) is provided between the high-pressure gauge (4) and the low-pressure gauge (5), one side of the gas-liquid separator (7) is connected to a first plate heat exchanger (18), and a first temperature sensor (6) is provided between the gas-liquid separator (7) and the compressor (1).
3. The testing device for a high and low temperature testing machine according to claim 1, characterized in that: A refrigeration solenoid valve (19) is fixedly sleeved on the bottom of the first plate heat exchanger (18), one side of the refrigeration solenoid valve (19) is connected to the thermal expansion valve (21), the top of the first plate heat exchanger (18) is connected to the second plate heat exchanger (8), an evaporator (22) is arranged at the bottom of the second plate heat exchanger (8), one side of the evaporator (22) is connected to the thermal expansion valve (21), a bypass solenoid valve (20) is arranged between the evaporator (22) and the thermal expansion valve (21), and one end of the bypass solenoid valve (20) is connected to the connection between the condenser (15) and the oil-gas separator (2).
4. The testing device for a high and low temperature testing machine according to claim 3, characterized in that: A circulating water tank (12) is provided on the side of the second plate heat exchanger (8), and a first liquid level switch (9) and a second liquid level switch (10) are provided between the circulating water tank (12) and the second plate heat exchanger (8).
5. The testing device for a high and low temperature testing machine according to claim 4, characterized in that: A second temperature sensor (26) is provided on the side of the circulating water tank (12), a liquid filling port (11) is provided on the top of the circulating water tank (12), and a heater (24) is inserted and connected to the side of the circulating water tank (12).
6. The testing device for a high and low temperature testing machine according to claim 4, characterized in that: A first circulating pump (23) is arranged between the circulating water tank (12) and the evaporator (22); a second circulating pump (25) is fixedly installed at the bottom of the circulating water tank (12); and a flow sensor (27), a first pressure sensor (28), a third temperature sensor (14), and a second pressure sensor (13) are arranged between the second circulating pump (25) and the circulating water tank (12).