A refrigerant valve performance test system

Abstract

The present invention innovatively provides a refrigerant valve performance test system, including a compressor unit, a gas temperature controller, a first test tooling area, a condenser, a supercooling thermostat, a second test tooling area, a third test tooling area, an evaporator and a fourth test tooling area. The compressor unit is used to compress the refrigerant into a gaseous refrigerant. The gaseous refrigerant passes through the gas temperature controller, the first test tooling area, the condenser, the supercooling thermostat, the second test tooling area, the third test tooling area, the evaporator, the fourth test tooling area and the compressor unit in sequence through connecting pipelines. The condenser is used to condense the gaseous refrigerant into a liquid refrigerant, and the evaporator is used to convert atomized small droplet-shaped refrigerant into a gaseous refrigerant. The advantage of the present invention is that it can simulate high-precision multi-performance testing of the refrigeration environment of new energy vehicles.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerant valve testing, and more particularly to a refrigerant valve performance testing system. Background Art

[0002] Refrigerant valve refers to the regulation of refrigerant flow according to indoor temperature, so as to achieve control of indoor temperature. Therefore, the application field of refrigerant valves continues to expand, and it is widely used in home and industry. As the policy support for new energy vehicles continues to increase, the refrigerant valves used in new energy vehicles are also relatively common. As the valves for controlling the temperature inside the car in new energy vehicles, the quality requirements are relatively strict. The high quality of internal automotive parts can drive the new energy vehicle industry. For the refrigeration system of new energy vehicles, the refrigerant valves in the present invention mainly include three types, namely: solenoid valves, one-way valves and electronic expansion valves. These three valves are crucial to the control of refrigerant media in the refrigeration system. Therefore, performance testing of refrigerant valves is particularly important. At present, manufacturers do not have high-precision testing equipment specifically for environmental simulation of refrigerant valves. Summary of the invention

[0003] In view of the deficiencies in the prior art, an object of the present invention is to provide a high-precision refrigerant valve performance detection system capable of simulating the refrigeration environment of new energy vehicles, so as to overcome the above-mentioned defects in the prior art.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A refrigerant valve performance test system includes a compressor unit, a gas temperature controller, a first test tooling area, a condenser, a supercooling thermostat, a second test tooling area, a third test tooling area, an evaporator, and a fourth test tooling area. The compressor unit is used to compress the refrigerant into a gaseous refrigerant. The gaseous refrigerant passes through the gas temperature controller, the first test tooling area, the condenser, the supercooling thermostat, the second test tooling area, the third test tooling area, the evaporator, the fourth test tooling area, and the compressor unit in sequence through a connecting pipeline. The first test tooling area includes a first test main circuit, a first test branch circuit, and a first A station to be tested, a first differential pressure sensor and two groups of first pressure sensors, the first test branch is connected in parallel to a first test main line, the first station to be tested is connected to the first test branch, a solenoid valve to be tested is placed on the first station to be tested, two groups of the first pressure sensors are respectively located at both ends of the first station to be tested, the first differential pressure sensor is connected to the two groups of the first pressure sensors, a first stop valve is provided on the first test branch on the front side of the first station to be tested, a first flow meter is also provided on the first test branch, and a first regulating valve and a first temperature sensor are provided on the first test main line;

[0006] The condenser is used to condense the gaseous refrigerant into a liquid refrigerant. The supercooling thermostatic box includes a box body, a water cooling component and a supercooling pipe located in the box body. The box body is filled with thermostatic materials. One end of the supercooling pipe is connected to the first test main circuit, and the other end is connected to the second test main circuit. The water cooling component is wound around the supercooling pipe.

[0007] The second test tooling area includes a second test main circuit, a second test branch circuit, a second station to be tested, a second pressure difference sensor and two groups of second pressure sensors, the second test branch circuit is connected in parallel to the second test main circuit, the second station to be tested is connected to the second test branch circuit, a one-way valve to be tested is placed on the second station to be tested, two groups of the second pressure sensors are respectively located at both ends of the second station to be tested, the second pressure difference sensor is connected to the two groups of the second pressure sensors, a second stop valve is provided on the second test branch circuit at the front side of the second station to be tested, a second flow meter is also provided on the second test branch circuit, and a second regulating valve and a second temperature sensor are provided on the second test main circuit;

[0008] The third test tooling area includes a third test main circuit, a third test branch circuit, a third station to be tested and two groups of third pressure sensors. The third test branch circuit is connected in parallel to the third test main circuit, the third station to be tested is connected to the third test branch circuit, an expansion valve to be tested is placed on the third station to be tested, and two groups of third pressure sensors are respectively located at both ends of the third station to be tested. A third stop valve is provided on the third test branch circuit in front of the third station to be tested, a third flow meter is also provided on the third test branch circuit, and an electronic expansion valve and a third temperature sensor are also provided on the third test main circuit. The electronic expansion valve is used to atomize the liquid refrigerant into small droplets.

[0009] The evaporator is used to convert atomized small droplet-shaped refrigerant into gaseous refrigerant.

[0010] The fourth test tooling area includes a fourth test main circuit, a fourth test branch circuit, a fourth station to be tested, a third pressure difference sensor and two groups of fourth pressure sensors. The fourth test branch circuit is connected in parallel to the fourth test main circuit, the fourth station to be tested is connected to the fourth branch circuit, a one-way valve to be tested is placed on the fourth station to be tested, two groups of the fourth pressure sensors are respectively located at both ends of the fourth station to be tested, the third pressure difference sensor is connected to the two groups of the fourth pressure sensors, a fourth stop valve is provided on the fourth test branch circuit at the front side of the fourth station to be tested, a fourth flow meter is also provided on the fourth test branch circuit, and a third regulating valve and a fourth temperature sensor are provided on the fourth test main circuit;

[0011] Furthermore, it also includes a condensate cooling zone, which includes a water-to-water heat exchanger and a water circulation thermostat. A first pipe is provided between the condenser and the water-to-water heat exchanger, a second pipe is provided between the water-to-water heat exchanger and the water circulation thermostat, and a third pipe is provided between the water circulation thermostat and the condenser. A fifth temperature sensor and a ball valve are provided on the first pipe, a sixth temperature sensor and a first check valve are provided on the second pipe, and a first filter, a condensate pump and a condensate flow meter are provided on the third pipe.

[0012] Furthermore, it also includes an evaporation temperature control zone, which includes a fourth pipe and a fifth pipe. One end of the fourth pipe is connected to the evaporator, and the other end is connected to the water circulation constant temperature box. One end of the fifth pipe is connected to the water circulation constant temperature box, and the other end is connected to the evaporator. The fourth pipe is provided with a seventh temperature sensor and a second one-way valve, and the fifth pipe is provided with a second filter, an evaporation water pump and an evaporation water flow meter.

[0013] Furthermore, the compressor unit includes a compressor body, a pressure controller, an exhaust temperature protector and an oil separator. The pressure controller and the exhaust temperature protector are both connected to the compressor body, and an oil reflux pipe is provided between the oil separator and the compressor body.

[0014] Furthermore, a liquid reservoir and a drying filter are provided between the supercooling thermostat and the second test tooling area, the liquid reservoir is used to collect the liquid refrigerant medium after being supercooled by the supercooling thermostat, and the drying filter is used to filter impurities in the liquid refrigerant flowing from the liquid reservoir to the second test tooling area.

[0015] Furthermore, a test branch is provided on the first test branch, and the test branch is connected in parallel to the first test branch. A solenoid valve and a branch flow meter are provided on the first test branch and the test branch, respectively.

[0016] Furthermore, the water cooling assembly includes a water cooling pipe, a cold water tank and two groups of external pipes. The water cooling pipe is wound around the outer ring of the supercooling pipe. A water inlet is provided on one side wall of the upper end of the box body, and a water outlet is provided on one side wall of the lower end of the box body. Both ends of the water cooling pipe pass through the water inlet and the water outlet respectively and are connected and communicated with the two groups of external pipes. Both groups of external pipes are connected to the cold water tank and are communicated with each other. A pressure pump is also provided on the external pipe connected to the water cooling pipe passing through the water inlet.

[0017] Furthermore, the first test branch is provided with a first vacuum joint, which is located on the first test branch after the cold medium flows through the first test station; the second test branch is provided with a second vacuum joint, which is located on the second test branch after the cold medium flows through the second test station; the third test branch is provided with a third vacuum joint, which is located on the third test branch after the cold medium flows through the third test station; the fourth test branch is provided with a fourth vacuum joint, which is located on the fourth test branch after the cold medium flows through the fourth test station.

[0018] Furthermore, a refrigerant joint and a fifth vacuum joint are provided between the fourth test tooling area and the compressor unit.

[0019] Furthermore, an eighth temperature sensor and a fifth pressure sensor are provided between the first test tooling area and the condenser, and a ninth temperature sensor and a sixth pressure sensor are provided between the condenser and the supercooling constant temperature bath.

[0020] The beneficial effects of the present invention are as follows: the refrigerant is pressurized to a preset pressure by the compressor unit, and at the same time, the temperature of the refrigerant is raised to a certain level by the compressor unit during pressurization, so that the originally liquid refrigerant is compressed into a gaseous refrigerant, and then the gaseous refrigerant is temperature-controlled by the gas temperature controller to reach the temperature required by the first test tooling area, so as to achieve the performance test of the solenoid valve, and the gaseous refrigerant is condensed into a liquid refrigerant by the condenser, and a small amount of uncondensed gaseous refrigerant is completely condensed into a liquid refrigerant by auxiliary condensation of a supercooled thermostatic box, so as to achieve the second test tooling area. The performance test of the one-way valve in the test tooling area is carried out, and then the pressure of the liquid refrigerant flowing to the electronic expansion valve in the third test tooling area is adjusted through the flow meter so that the electronic expansion valve can perform performance testing. The electronic expansion valve will atomize the liquid refrigerant into small droplets, and the small droplets of refrigerant are completely vaporized into gaseous refrigerant through the evaporator. The pressure of the gaseous refrigerant is then adjusted through the regulating valve to perform other performance tests on the one-way valve in the fourth test tooling, and finally it is emptied or flows to the compressor unit. The whole system can realize high-precision performance testing of the refrigerant valve in a simulated automobile refrigeration environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is the overall system diagram of the present invention;

[0022] Figure 2 It is a structural diagram of the first test tooling area in the present invention;

[0023] Figure 3 It is a structural diagram of the second test tooling area in the present invention;

[0024] Figure 4It is a structural diagram of the third test tooling area in the present invention;

[0025] Figure 5 It is a structural diagram of the fourth test tooling area in the present invention;

[0026] Figure 6 It is a structural diagram of the condensed water cooling zone in the present invention;

[0027] Figure 7 It is a structural diagram of the evaporation temperature adjustment zone in the present invention;

[0028] Figure 8 is a structural diagram of a compressor unit in the present invention;

[0029] Fig. 9 It is a structural diagram of the supercooling thermostatic box in the present invention.

[0030] Figure numerals: 1, compressor unit; 1011, compressor body; 1021, pressure controller; 1031, exhaust temperature protector; 1041, oil separator; 2, gas temperature controller; 3, first test tooling area; 31, first test main road; 32, first test branch road; 33, first test station; 34, first differential pressure sensor; 35, first pressure sensor; 36, first stop valve; 37, first flow meter; 38, first regulating valve; 39, first temperature sensor; 4, condenser; 5, subcooling thermostat; 51, box; 52, subcooling pipe; 53, water cooling pipe; 54, cold water tank; 55, external pipe ; 56, pressure pump; 6, second test tooling area; 61, second test main road; 62, second test branch; 63, second test station; 64, second differential pressure sensor; 65, second pressure sensor; 66, second stop valve; 67, second flow meter; 68, second regulating valve; 69, second temperature sensor; 7, third test tooling area; 71, third test main road; 72, third test branch; 73, third test station; 74, third pressure sensor; 75, third stop valve; 76, third flow meter; 77, electronic expansion valve; 78, third temperature sensor; 79, sight glass; 8, evaporator; 9, The fourth test tooling area; 91, the fourth test main road; 92, the fourth test branch road; 93, the fourth station to be tested; 94, the third differential pressure sensor; 95, the fourth pressure sensor; 96, the fourth stop valve; 97, the fourth flow meter; 98, the third regulating valve; 99, the fourth temperature sensor; 10, the condensate cooling area; 101, the water-to-water heat exchanger; 102, the first pipeline; 103, the second pipeline; 104, the third pipeline; 105, the fifth temperature sensor; 106, the sixth temperature sensor; 107, the first one-way valve; 108, the first filter; 109, the condensate pump; 110, the condensate flow meter; 11, Evaporation temperature control zone; 111, fourth pipeline; 112, fifth pipeline; 113, seventh temperature sensor; 114, second one-way valve; 115, second filter; 116, evaporation water pump; 117, evaporation water flow meter; 12, water circulation thermostat; 13, liquid storage tank; 14, drying filter; 15, test branch; 16, first vacuum joint; 17, second vacuum joint; 18, third vacuum joint; 19, fourth vacuum joint; 20, refrigerant joint; 21, fifth vacuum joint; 22, eighth temperature sensor; 23, fifth pressure sensor; 24, ninth temperature sensor; 25, sixth pressure sensor. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be a component centered. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may also be a component centered. When a component is considered to be "set on" another component, it may be directly set on the other component or there may also be a component centered. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0034] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings:

[0035] The high quality of the internal parts of the car can drive the new energy automobile industry. For the refrigeration system of new energy vehicles, the refrigerant valves in the present invention mainly include three types, namely: solenoid valve, one-way valve and electronic expansion valve 77. These three valves are crucial to the control of the refrigerant medium in the refrigeration system, so the performance test of the refrigerant valve is particularly important. Since the manufacturers currently do not have high-precision detection equipment specifically for the environmental simulation of the refrigerant valve, this refrigerant valve performance test system is designed. The specific structure is as follows Figure 1-9As shown, it includes a compressor unit 1, a gas temperature controller 2, a first test tooling area 3, a condenser 4, a supercooling thermostat 5, a second test tooling area 6, a third test tooling area 7, an evaporator 8 and a fourth test tooling area 9. The compressor unit 1 is used to compress the refrigerant medium into a gaseous refrigerant medium. The gaseous refrigerant medium passes through the gas temperature controller 2, the first test tooling area 3, the condenser 4, the supercooling thermostat 5, the second test tooling area 6, the third test tooling area 7, the evaporator 8, the fourth test tooling area 9 and the compressor unit 1 in sequence through connecting pipelines. The gas temperature controller 2 realizes temperature control by water cooling. Since the temperature of the compressor unit 1 is very high when compressing the refrigerant medium into a gaseous refrigerant medium, gas The water cooling in the temperature controller 2 cools it down. A cooling water inlet pipe and a cooling water outlet pipe are respectively provided at both ends of the gas temperature controller 2. An electric ball valve is installed on the cooling water inlet pipe, and a full-diameter ball valve is installed on the cooling water outlet. The first test tooling area 3 includes a first test main circuit 31, a first test branch circuit 32, a first station to be tested 33, a first pressure difference sensor 34 and two groups of first pressure sensors 35. The first test branch circuit 32 is connected in parallel to the first test main circuit 31, the first station to be tested 33 is connected to the first test branch circuit 32, and a solenoid valve to be tested is placed on the first station to be tested 33 (the main test functions of the first test tooling area 3 include: MOPV test, pressure loss test and noise test, among which the MOPV test The prerequisites for the test are that the flow rate of the gaseous refrigerant must reach 240g / s, the pressure of the gaseous refrigerant must reach 2.9MPa±0.15MPa, and the prerequisites for the pressure loss test are that the flow rate of the gaseous refrigerant must reach 155g / s, the temperature of the gaseous refrigerant must reach 95℃±5℃, and the inlet pressure of the solenoid valve to be tested must reach 2.6±0.15MPa). The two groups of first pressure sensors 35 are respectively located at both ends of the first station to be tested 33, the first differential pressure sensor 34 is connected to the two groups of first pressure sensors 35, and the first test branch 32 on the front side of the first station to be tested 33 is provided with a first stop valve 36, and the first test branch 32 is also provided with a first flowmeter 37. The first test main circuit 31 is provided with a first regulating valve 38 and a first temperature sensor 39, wherein the first flow meter 37 and the first regulating valve 38 are used to ensure the smooth operation of the overall system. When the gaseous refrigerant flows to the first test branch circuit 32 and the first test main circuit 31 at the same time, the flow on the first test branch circuit 32 is detected by the first flow meter 37 to adjust the first regulating valve 38, and control the flow of the first test main circuit 31 to achieve the total flow of the first test branch circuit 32 and the first test main circuit 31 remains unchanged, and the entire system can always operate normally and smoothly. The first temperature sensor 39 detects whether the temperature of the gaseous refrigerant flowing into the first test fixture meets the requirements of the pressure loss test of the solenoid valve to be tested.

[0036] Since the test of the second test tooling area 6 requires a liquid refrigerant, the gaseous refrigerant needs to be condensed into a liquid state. The condenser 4 in the present invention is used to condense the gaseous refrigerant into a liquid refrigerant. Fig. 9 As shown, the supercooling constant temperature box 5 includes a box body 51, a water cooling component and a supercooling pipe 52 located in the box body 51, the box body 51 is filled with a constant temperature material (the constant temperature material is silicone oil), one end of the supercooling pipe 52 is connected to the first test main path 31, and the other end is connected to the second test main path 61, the water cooling component is wound around the supercooling pipe 52, the water cooling component includes a water cooling pipe 53, a cold water tank 54 and two groups of external pipes 55, the water cooling pipe 53 is wound around the outer circle of the supercooling pipe 52, a water inlet is provided on one side wall of the upper end of the box body 51, and a water outlet is provided on one side wall of the lower end of the box body 51, two ends of the water cooling pipe 53 pass through the water inlet and the water outlet respectively, and are connected and communicated with the two groups of external pipes 55, the two groups of external pipes 55 are both connected to the cold water tank 54 and communicated, and a pressure pump 56 is also provided on the external pipe 55 connected to the water cooling pipe 53 passing through the water inlet.

[0037] The second test tooling area 6 includes a second test main circuit 61, a second test branch circuit 62, a second station to be tested 63, a second differential pressure sensor 64 and two groups of second pressure sensors 65. The second test branch circuit 62 is connected in parallel to the second test main circuit 61, the second station to be tested 63 is connected to the second test branch circuit, and a one-way valve to be tested is placed on the second station to be tested 63 (the main test functions of the second test tooling area 6 include: pressure loss test and noise test. The prerequisite for the pressure loss test is that the flow rate of the gaseous refrigerant must reach 210g / s, the inlet pressure flowing into the one-way valve to be tested must reach 2.4±0.15MPa, and the supercooling must reach 5±1°C. The water cooling temperature in the supercooling thermostat 5 in the previous sequence needs to be 5±1°C lower than the temperature of the liquid refrigerant flowing into the supercooling thermostat 5). The two groups of second pressure sensors 65 are respectively located at both ends of the second station to be tested 63, and the second differential pressure sensor 64 is connected to two groups of second pressure sensors 65, a second stop valve 66 is provided on the second test branch 62 on the front side of the second test station 63, a second flow meter 67 is also provided on the second test branch 62, and a second regulating valve 68 and a second temperature sensor 69 are provided on the second test main road 61, wherein the second flow meter 67 and the second regulating valve 68 function to ensure the smooth operation of the overall system, when the liquid refrigerant flows to the second test branch 62 and the second test main road 61 at the same time, the flow on the second test branch 62 is detected according to the second flow meter 67 to adjust the second regulating valve 68, and control the flow of the second test main road 61, so as to achieve that the total flow of the second test branch 62 and the second test main road 61 remains unchanged, and the whole system can always operate normally and smoothly, and the second temperature sensor 69 detects whether the temperature of the liquid refrigerant flowing into the second test fixture reaches the requirement of supercooling 5±1°C.

[0038] The third test fixture area 7 includes a third test main circuit 71, a third test branch circuit 72, a third test station 73 and two sets of third pressure sensors 74. The third test branch circuit 72 is connected in parallel to the third test main circuit 71. The third test station 73 is connected to the third test branch circuit. The third test station 73 is placed on the third test station 73. The third test station 73 has an expansion valve to be tested (the main test functions of the third test fixture area 7 include: MOPD test, MOPV test, minimum valve opening pulse test, flow curve test and noise test. The prerequisite for MOPD test is The flow rate of the liquid refrigerant needs to reach 240g / s, and the pressure of the liquid refrigerant needs to reach 2.9MPa±0.15MPa. The prerequisite for MOPV testing is that the flow rate of the liquid refrigerant needs to reach 240g / s, and the pressure of the liquid refrigerant needs to reach 2.9MPa±0.15MPa. When the flow rate of the liquid refrigerant needs to be 10g / s-20g / s, and the pressure of the liquid refrigerant is 2.6±0.15MPa, the pressure outflowing from the expansion valve to be tested is the same as the pressure flowing into the expansion valve to be tested. The difference is 2.2±0.15MPa, and the supercooling needs to reach 5±1℃, and when the pressure of the liquid refrigerant is 1±0.1MPa, the pressure difference between the pressure flowing out of the expansion valve to be tested and the pressure flowing into the expansion valve to be tested is 0.7±0.1MPa, and the supercooling needs to reach 5±1℃, the minimum valve opening pulse test and the flow curve test can be carried out), two sets of third pressure sensors 74 are respectively located at both ends of the third station to be tested 73, and a third shut-off valve 75 is provided on the third test branch 72 on the front side of the third station to be tested 73. A third flow meter 76 is also provided on 72, and an electronic expansion valve 77 and a third temperature sensor 78 are also provided on the third test main line 71. The electronic expansion valve 77 is used to atomize the liquid refrigerant into small droplets, and the function of the electronic expansion valve 77 is similar to that of the regulating valve in the previous sequence. The third flow meter 76 can be used to adjust the flow relationship between the third test main line 71 and the third test branch line 72 to ensure smooth operation of the system. A sight glass 79 is also provided on the third test branch line 72 to observe the situation in the third test branch line 72 pipeline.

[0039] The evaporator 8 is used to convert the atomized small droplet-shaped refrigerant into a gaseous refrigerant.

[0040] The fourth test tooling area 9 includes a fourth test main circuit 91, a fourth test branch circuit 92, a fourth station to be tested 93, a third pressure difference sensor 94 and two groups of fourth pressure sensors 95. The fourth test branch circuit 92 is connected in parallel to the fourth test main circuit 91, the fourth station to be tested 93 is connected to the fourth test branch circuit, and a one-way valve to be tested is placed on the fourth station to be tested 93 (the main test functions of the third test tooling area 7 include: pressure loss test and noise test. The prerequisite for the pressure loss test is that the flow rate of the gaseous refrigerant must reach 112g / s, and the inlet pressure flowing into the one-way valve to be tested must reach 300±50KPa, gas phase). The two groups of fourth pressure sensors 95 are respectively located at both ends of the fourth station to be tested 93, and the third pressure difference sensor 94 and the two groups A fourth pressure sensor 95 is connected, a fourth shut-off valve 96 is provided on the fourth test branch 92 on the front side of the fourth test station 93, a fourth flow meter 97 is also provided on the fourth test branch 92, and a third regulating valve 98 and a fourth temperature sensor 99 are provided on the fourth test main line 91. The fourth flow meter 97 and the third regulating valve 98 are used to ensure the smooth operation of the overall system. When the gaseous refrigerant flows to the fourth test branch 92 and the fourth test main line 91 at the same time, the flow on the fourth test branch 92 is detected according to the fourth flow meter 97 to adjust the third regulating valve 98, and control the flow of the fourth test main line 91, so as to achieve that the total flow of the fourth test branch 92 and the fourth test main line 91 remains unchanged, and the entire system can always operate normally and smoothly.

[0041] In summary, in traditional detection systems, when detecting refrigerant valves of different sizes and flow rates, it is necessary to adjust the flow relationship between the system branch and the main line, which is quite laborious. When replacing refrigerant valves of other flow rates for detection, it takes a long time to debug the flow rate. Therefore, another biggest advantage of the present invention is that the debugging of flow rate, pressure and temperature is relatively convenient, saving debugging time.

[0042] Since the gaseous refrigerant medium releases heat when condensing in the condenser 4, the temperature of the condensate in the condenser 4 will increase. In order to cool the condensate, the present invention also includes a condensate cooling zone 10, and the condensate cooling zone 10 includes a water-to-water heat exchanger 101 and a water circulation thermostat 12 (the water-to-water heat exchanger 101 and the water circulation thermostat 12 in the condensate cooling zone 10 belong to double cooling, the upper end of the water-to-water heat exchanger 101 is connected to a cooling water inlet pipe, and the lower end is connected to a cooling water outlet pipe, the cooling water inlet pipe is equipped with an electric ball valve, and the cooling water outlet pipe is equipped with a full-diameter ball valve), a first pipeline 102 is provided between the condenser 4 and the water-to-water heat exchanger 101, a fifth temperature sensor 105 and a ball valve are provided on the first pipeline 102 (the function of the fifth temperature sensor 105 is to detect the temperature of the condensate in the first pipeline 102), a second pipeline 103 is provided between the water-to-water heat exchanger 101 and the water circulation thermostat 12, A sixth temperature sensor 106 and a first one-way valve 107 (the function of the sixth temperature sensor 106 is to detect the temperature of the condensate in the second pipe 103 after the first step of cooling, and the function of the first one-way valve 107 is to prevent the condensate in the second pipe 103 from flowing back into the water-to-water heat exchanger 101). A third pipe 104 is provided between the water circulation thermostat 12 and the condenser 4. A first filter 108, a condensate pump 109 and a condensate flow meter 110 are provided on the third pipe 104. Silicone oil is also installed in the water circulation thermostat 12. The silicone oil serves as a constant temperature medium and is cooled by water circulation. The first filter 108 is used to filter impurities in the coolant. The condensate pump 109 serves as a power source to pump the coolant in the water circulation thermostat 12, the second pipe 103, the water-to-water heat exchanger 101 and the first pipe 102 to the third pipe 104 to flow into the condenser 4. The condensate flow meter 110 is used to measure the flow rate of the condensate in the third pipe 104.

[0043] Since the evaporator 8 is the most important component in the refrigeration system, the atomized refrigerant absorbs heat to become a gaseous refrigerant after passing through the evaporator 8, the evaporator 8 is cooled, and the fan will blow air to the evaporator 8. In order to adjust the temperature of the evaporator 8 so that the blown-out temperature can adapt to the working conditions, the present invention also includes an evaporation temperature adjustment area 11. The evaporation temperature adjustment area 11 includes a fourth pipe 111 and a fifth pipe 112. One end of the fourth pipe 111 is connected to the evaporator 8, and the other end is connected to the water circulation thermostat 12. One end of the fifth pipe 112 is connected to the water circulation thermostat 12, and the other end is connected to the evaporator 8. A seventh temperature sensor 113 and a second one-way valve 114 are provided on the pipeline 111 (the function of the seventh temperature sensor 113 is to detect the temperature of the water flowing out of the evaporator 8 in the fourth pipeline 111, and the function of the second one-way valve 114 is to prevent the water in the fourth pipeline 111 from flowing back into the evaporator 8). A second filter 115, an evaporative water pump 116 and an evaporative water flow meter 117 are provided on the fifth pipeline 112. The function of the second filter 115 is to remove impurities in the circulating water. The evaporative water pump 116 serves as a power source. The function of the evaporation temperature control zone 11 is to adjust the working condition of the evaporator 8, and the pressure and temperature can be adjusted.

[0044] The compressor unit 1 includes a compressor body 1011, a pressure controller 1021, an exhaust temperature protector 1031 and an oil separator 1041. The pressure controller 1021 and the exhaust temperature protector 1031 are both connected to the compressor body 1011. An oil reflux pipe is provided between the oil separator 1041 and the compressor body 1011. The pressure controller 1021 and the exhaust temperature protector 1031 are used to protect the compressor body 1011. Since a lot of lubricating oil is contained in the compressor body 1011, the compressor body 1011 is prone to discharge the lubricating oil and the refrigerant medium into the gas temperature controller 2 at the same time during the compression process. Therefore, the function of the oil separator 1041 is to filter the lubricating oil in the refrigerant medium and then discharge the filtered lubricating oil into the compressor body 1011.

[0045] A liquid reservoir 13 and a drying filter 14 are provided between the supercooling thermostat 5 and the second test tooling area 6. The liquid reservoir 13 is used to collect the liquid refrigerant medium after being supercooled by the supercooling thermostat 5, and the drying filter 14 is used to filter impurities in the liquid refrigerant flowing from the liquid reservoir 13 to the second test tooling area 6.

[0046] Since the electronic expansion valve 77 can also be tested on the first test station 33, and the caliber of the test solenoid valve is different, a test branch 15 is also provided on the first test branch 32, and the test branch 15 is connected in parallel to the first test branch 32. The first test branch 32 and the test branch 15 are respectively provided with a solenoid valve and a branch flow meter. When the expansion valve is tested on the first test station 33 in the present invention, there are MOPD test, MOPV test, minimum valve opening pulse test, flow curve test, pressure loss test and noise test. The prerequisite requirement of the MOPD test is that the flow rate of the liquid refrigerant medium needs to reach 240g / s, and the pressure of the liquid refrigerant medium needs to reach 2.9MPa±0.15MPa. The prerequisite requirement of the MOPV test is that the flow rate of the liquid refrigerant medium needs to reach 240g / s, and the pressure of the liquid refrigerant medium needs to reach 2.9MPa±0.15MPa. It needs to reach 2.9MPa±0.15MPa. The prerequisite for the minimum valve opening pulse test is that the flow rate of the liquid refrigerant needs to be 2g / s, the required temperature is 95℃±5℃, the inlet pressure flowing into the expansion valve to be tested is 2.6±0.15MPa, and the pressure difference between the pressure flowing out of the expansion valve to be tested and the pressure flowing into the expansion valve to be tested is 25±10KPa. The prerequisite for the flow curve test is that the temperature of the liquid refrigerant is 95℃±5℃, the inlet pressure flowing into the expansion valve to be tested is 2.6±0.15MPa, and the pressure difference between the pressure flowing out of the expansion valve to be tested and the pressure flowing into the expansion valve to be tested is 25±10KPa; the prerequisite for the pressure loss test is that the flow rate of the liquid refrigerant needs to reach 60g / s, the required temperature is 95℃±5℃, and the inlet pressure flowing into the expansion valve to be tested needs to reach 2.6±0.15MPa.

[0047] A first vacuum joint 16 is provided on the first test branch 32, and the first vacuum joint 16 is located on the first test branch 32 after the cold medium flows through the first test station. A second vacuum joint 17 is provided on the second test branch 62, and the second vacuum joint 17 is located on the second test branch 62 after the cold medium flows through the second test station. A third vacuum joint 18 is provided on the third test branch 72, and the third vacuum joint 18 is located on the third test branch 72 after the cold medium flows through the third test station. A fourth vacuum joint 19 is provided on the fourth test branch 92, and the fourth vacuum joint 19 is located on the fourth test branch 92 after the cold medium flows through the fourth test station. Each vacuum joint is externally connected to a vacuum pump and the outside of the room, and its purpose is to evacuate the cold medium at the corresponding location for subsequent testing.

[0048] A refrigerant joint 20 and a fifth vacuum joint 21 are provided between the fourth test tooling area 9 and the compressor unit 1 . The refrigerant joint 20 is used to supplement the refrigerant of the compressor unit 1 .

[0049] An eighth temperature sensor 22 and a fifth pressure sensor 23 are provided between the first test tooling area 3 and the condenser 4, and a ninth temperature sensor 24 and a sixth pressure sensor 25 are provided between the condenser 4 and the supercooling constant temperature bath. The function of the different temperature sensors at the above multiple different positions is to monitor the temperature at the corresponding locations.

[0050] System process: First, the refrigerant is introduced into the compressor unit 1 through the refrigerant joint 20. The compressor unit 1 compresses the refrigerant into a gaseous state, and then passes it into the gas temperature controller 2 for temperature adjustment. The gaseous refrigerant after temperature and pressure adjustment is passed into the first test fixture area 3 to detect the solenoid valve or expansion valve. The gaseous refrigerant passes through the first test fixture and then enters the condenser 4 to condense into liquid refrigerant. The gaseous refrigerant containing a small amount is completely converted into liquid refrigerant after passing through the supercooling thermostat 5. Finally, all the liquid refrigerant flows into the liquid reservoir 13. The liquid refrigerant in the liquid reservoir 13 flows through the drying process. After the filter 14, the refrigerant medium is filtered for impurities, and after adjusting the pressure and flow rate, it flows to the second test tooling area 6 to test the one-way valve. The liquid refrigerant after the test in the second test tooling area 6 flows to the third test tooling area 7 for testing after adjusting the pressure, flow rate and temperature. Since the liquid refrigerant after the test in the third test tooling area 7 will be atomized into small water droplets after passing through the expansion valve, it flows to the evaporator 8 for evaporation, and the evaporator 8 is cooled. The gaseous refrigerant after evaporation adjusts the pressure, flow rate and temperature and then flows to the fourth test assembly area to test the one-way valve, and finally flows back to the compressor unit 1 for re-compression.

[0051] The above are only preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A refrigerant valve performance test system, characterized in that: The invention comprises a compressor unit (1), a gas temperature controller (2), a first test tooling area (3), a condenser (4), a supercooling thermostat (5), a second test tooling area (6), a third test tooling area (7), an evaporator (8), and a fourth test tooling area (9). The compressor unit (1) is used to compress a refrigerant into a gaseous refrigerant. The gaseous refrigerant passes through the gas temperature controller (2), the first test tooling area (3), the condenser (4), the supercooling thermostat (5), the second test tooling area (6), the third test tooling area (7), the evaporator (8), the fourth test tooling area (9), and the compressor unit (1) in sequence through a connecting pipeline. The first test tooling area (3) comprises a first test main circuit (31), a first test branch circuit (32), a first to-be-tested station (33), a first compressor unit (1), and a second to-be-tested station (34). A pressure difference sensor (34) and two groups of first pressure sensors (35), the first test branch (32) is connected in parallel to the first test main path (31), the first workstation to be tested (33) is connected to the first test branch (32), a solenoid valve to be tested is placed on the first workstation to be tested (33), the two groups of the first pressure sensors (35) are respectively located at two ends of the first workstation to be tested (33), the first pressure difference sensor (34) is connected to the two groups of the first pressure sensors (35), a first stop valve (36) is provided on the first test branch (32) at the front side of the first workstation to be tested (33), a first flow meter (37) is also provided on the first test branch (32), and a first regulating valve (38) and a first temperature sensor (39) are provided on the first test main path (31); The condenser (4) is used to condense a gaseous refrigerant into a liquid refrigerant. The supercooling thermostatic box (5) comprises a box body (51), a water cooling component located in the box body (51), and a supercooling pipe (52). The box body (51) is filled with a thermostatic material. One end of the supercooling pipe (52) is connected to the first test main circuit (31), and the other end is connected to the second test main circuit (61). The water cooling component is wound around the supercooling pipe (52). The second test tooling area (6) comprises a second test main circuit (61), a second test branch circuit (62), a second station to be tested (63), a second differential pressure sensor (64) and two groups of second pressure sensors (65); the second test branch circuit (62) is connected in parallel to the second test main circuit (61); the second station to be tested (63) is connected to the second test branch circuit; a non-return valve to be tested is placed on the second station to be tested (63); the two groups of the second pressure sensors (65) are respectively located at two ends of the second station to be tested (63); the second differential pressure sensor (64) is connected to the two groups of the second pressure sensors (65); a second stop valve (66) is provided on the second test branch circuit (62) at the front side of the second station to be tested (63); a second flow meter (67) is also provided on the second test branch circuit (62); and a second regulating valve (68) and a second temperature sensor (69) are provided on the second test main circuit (61); The third test tooling area (7) includes a third test main circuit (71), a third test branch circuit (72), a third station to be tested (73) and two groups of third pressure sensors (74); the third test branch circuit (72) is connected in parallel to the third test main circuit (71); the third station to be tested (73) is connected to the third test branch circuit; an expansion valve to be tested is placed on the third station to be tested (73); the two groups of third pressure sensors (74) are respectively located at two ends of the third station to be tested (73); a third stop valve (75) is provided on the third test branch circuit (72) at the front side of the third station to be tested (73); a third flow meter (76) is also provided on the third test branch circuit (72); an electronic expansion valve (77) and a third temperature sensor (78) are also provided on the third test main circuit (71); the electronic expansion valve (77) is used to atomize the liquid refrigerant into small droplets; The evaporator (8) is used to convert the atomized small droplet-shaped refrigerant into a gaseous refrigerant; The fourth test tooling area (9) includes a fourth test main circuit (91), a fourth test branch circuit (92), a fourth station to be tested (93), a third pressure difference sensor (94) and two groups of fourth pressure sensors (95); the fourth test branch circuit (92) is connected in parallel to the fourth test main circuit (91); the fourth station to be tested (93) is connected to the fourth test branch circuit; a one-way valve to be tested is placed on the fourth station to be tested (93); the two groups of fourth pressure sensors (95) are respectively located at two ends of the fourth station to be tested (93); the third pressure difference sensor (94) is connected to the two groups of fourth pressure sensors (95); a fourth stop valve (96) is provided on the fourth test branch circuit (92) at the front side of the fourth station to be tested (93); a fourth flow meter (97) is also provided on the fourth test branch circuit (92); and a third regulating valve (98) and a fourth temperature sensor (99) are provided on the fourth test main circuit (91); The invention also comprises a condensate cooling zone (10), wherein the condensate cooling zone (10) comprises a water-to-water heat exchanger (101) and a water circulation thermostat (12); a first pipe (102) is provided between the condenser (4) and the water-to-water heat exchanger (101); a second pipe (103) is provided between the water-to-water heat exchanger (101) and the water circulation thermostat (12); a third pipe (104) is provided between the water circulation thermostat (12) and the condenser (4); a fifth temperature sensor (105) and a ball valve are provided on the first pipe (102); a sixth temperature sensor (106) and a first non-return valve (107) are provided on the second pipe (103); and a first filter (108), a condensate pump (109) and a condensate flow meter (110) are provided on the third pipe (104); A liquid reservoir (13) and a drying filter (14) are provided between the supercooling thermostat (5) and the second test tooling area (6); the liquid reservoir (13) is used to collect the liquid refrigerant after being supercooled by the supercooling thermostat (5); and the drying filter (14) is used to filter impurities in the liquid refrigerant flowing from the liquid reservoir (13) to the second test tooling area (6).

2. A refrigerant valve performance testing system according to claim 1, characterized in that: The invention also comprises an evaporation temperature adjustment zone (11), wherein the evaporation temperature adjustment zone (11) comprises a fourth pipe (111) and a fifth pipe (112), wherein one end of the fourth pipe (111) is connected to the evaporator (8), and the other end is connected to the water circulation constant temperature box (12), and one end of the fifth pipe (112) is connected to the water circulation constant temperature box (12), and the other end is connected to the evaporator (8), and the fourth pipe (111) is provided with a seventh temperature sensor (113) and a second one-way valve (114), and the fifth pipe (112) is provided with a second filter (115), an evaporation water pump (116) and an evaporation water flow meter (117).

3. A refrigerant valve performance testing system according to claim 1, characterized in that: The compressor unit (1) comprises a compressor body (1011), a pressure controller (1021), an exhaust temperature protector (1031) and an oil separator (1041); the pressure controller (1021) and the exhaust temperature protector (1031) are both connected to the compressor body (1011); and an oil return pipe is provided between the oil separator (1041) and the compressor body (1011).

4. A refrigerant valve performance testing system according to claim 1, characterized in that: The first test branch (32) is also provided with a test branch (15), the test branch (15) is connected in parallel to the first test branch (32), and the first test branch (32) and the test branch (15) are respectively provided with a solenoid valve and a branch flow meter.

5. A refrigerant valve performance testing system according to claim 1, characterized in that: The water cooling assembly comprises a water cooling pipe (53), a cold water tank (54) and two groups of external pipes (55); the water cooling pipe (53) is wound around the outer ring of the supercooling pipe (52); a water inlet is provided on a side wall of the upper end of the box body (51); a water outlet is provided on a side wall of the lower end of the box body (51); two ends of the water cooling pipe (53) pass through the water inlet and the water outlet respectively to be connected to and communicate with the two groups of external pipes (55); the two groups of external pipes (55) are both connected to the cold water tank (54) and communicate with each other; a pressure pump (56) is also provided on the external pipe (55) connected to the water cooling pipe (53) passing through the water inlet.

6. A refrigerant valve performance testing system according to claim 1, characterized in that: The first test branch (32) is provided with a first vacuum joint (16), and the first vacuum joint (16) is located on the first test branch (32) after the cold medium flows through the first test station. The second test branch (62) is provided with a second vacuum joint (17), and the second vacuum joint (17) is located on the second test branch (62) after the cold medium flows through the second test station. The third test branch (72) is provided with a third vacuum joint (18), and the third vacuum joint (18) is located on the third test branch (72) after the cold medium flows through the third test station. The fourth test branch (92) is provided with a fourth vacuum joint (19), and the fourth vacuum joint (19) is located on the fourth test branch (92) after the cold medium flows through the fourth test station.

7. A refrigerant valve performance testing system according to claim 1, characterized in that: A refrigerant joint (20) and a fifth vacuum joint (21) are provided between the fourth test tooling area (9) and the compressor unit (1).

8. A refrigerant valve performance testing system according to claim 1, characterized in that: An eighth temperature sensor (22) and a fifth pressure sensor (23) are provided between the first test tooling area (3) and the condenser (4), and a ninth temperature sensor (24) and a sixth pressure sensor (25) are provided between the condenser (4) and the supercooling constant temperature bath.

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