CN207181012U - A kind of performance testing device of electromagnetism heating power expansion valve - Google Patents

Abstract

The utility model relates to a performance testing device of an electromagnetic thermal expansion valve, which belongs to the technical field of thermal expansion valve throttling in vapor compression refrigeration systems, and is suitable for performance testing of various electromagnetic thermal expansion valves after assembly. It mainly includes the first air inlet path (1), the air storage tank (2), the second air inlet path (3), the electromagnetic thermal expansion valve (4), the third air outlet path (5), the second air outlet path (6), The first air outlet (7) and the fourth electromagnetic valve (8) are combined. It is characterized in that: the first air intake path (1) is connected to the B port of the electromagnetic thermal expansion valve (4). The second air intake path (3) is connected to the A port of the electromagnetic thermal expansion valve (4). The first gas outlet path (7), the second gas outlet path (6) and the third gas outlet path (5) are connected in parallel to the C interface of the electromagnetic thermal expansion valve (4). The performance testing device is controlled by PLC, and all performance tests can be completed once started.

Description

A performance testing device for an electromagnetic thermal expansion valve

technical field

The utility model relates to a performance testing device of an electromagnetic thermal expansion valve, which belongs to the technical field of thermal expansion valve throttling in vapor compression refrigeration systems, and is suitable for performance testing of various electromagnetic thermal expansion valves after assembly.

Background technique

The electromagnetic thermal expansion valve is composed of a thermal expansion valve and a solenoid valve. Electromagnetic thermal expansion valve, as a key component in the automotive air-conditioning system, plays the role of flow switch control, throttling and pressure reduction, flow adjustment, and maintenance of appropriate superheat in the automotive air-conditioning system. Its performance directly affects the refrigeration of the air-conditioning system. performance.

The static superheat of the electromagnetic thermal expansion valve directly affects the refrigeration performance of the automotive air conditioner and the stability of the entire system. The internal leakage flow rate of the electromagnetic thermal expansion valve controls the complete closing ability of the electromagnetic thermal expansion valve. The leakage of the balance part of the electromagnetic thermal expansion valve controls the sealing performance of the balance part of the electromagnetic thermal expansion valve. The valve opening ability of the electromagnetic thermal expansion valve under high pressure directly affects whether the electromagnetic thermal expansion valve can be opened normally under high pressure. At present, the static superheat degree, the leakage of the balance part, the internal leakage and the valve opening ability of the electromagnetic thermal expansion valve need to be tested separately. The static superheat test of the existing electromagnetic thermal expansion valve, the device is shown in Figure 1, mainly by the electromagnetic thermal expansion valve 1, P ₁ pressure gauge 2, pressure regulating valve 3, P ₂ pressure gauge 4, the second electromagnetic valve 5 , Throttle orifice 6, the first solenoid valve 7 and other components. Static superheat test process: Use the pressure regulating valve 3 to adjust the _P1 pressure gauge 2 to 1.03±0.05MPa, make the solenoid valve 11 of the electromagnetic thermal expansion valve open, open the first solenoid valve 7, close and open the second solenoid valve 5 After three consecutive times, the pressure shown in P ₂ pressure gauge 4 is the static superheat value.

The existing leakage test of the balance part of the electromagnetic thermal expansion valve, the device is shown in Figure 2, which mainly consists of a pressure gauge 1, a pressure regulating valve 2, an electromagnetic thermal expansion valve 3, a second electromagnetic valve 4, a flow meter 5, a first electromagnetic Valve 6 and other components. Leakage test process of the balance part: use the pressure regulating valve 2 to adjust the pressure gauge 1 to 0.2MPa, make the solenoid valve 31 of the electromagnetic expansion valve open, open the first solenoid valve 6, open the second solenoid valve 4, and the flowmeter 5 will display The value is the leakage value of the balance part.

The internal leakage test and valve opening ability test of the existing electromagnetic thermal expansion valve, the device is shown in Figure 3, which mainly consists of a medium pressure regulating valve 1, a high pressure regulating valve 2, a _P1 pressure gauge 3, a first solenoid valve 4, an Thermal expansion valve 5, _P2 pressure gauge 6, second solenoid valve 7, third solenoid valve 8, flow meter 9, fourth solenoid valve 10, etc. The internal leakage test process of the electromagnetic thermal expansion valve: open the first electromagnetic valve 4, and adjust the _P1 pressure gauge 3 to 1.03±0.05MPa with the medium pressure regulating valve 1. Open the second electromagnetic valve 7, close and open the electromagnetic thermal expansion valve electromagnetic valve 51 three times, open the third electromagnetic valve 8, close the second electromagnetic valve 7, and the flow value shown by the flow meter 9 is the internal leakage value. The valve opening ability test process of the electromagnetic thermal expansion valve: close the first solenoid valve 4 and the third solenoid valve 8, open the fourth solenoid valve 10 and the second solenoid valve 7, and adjust the _P1 pressure gauge 3 to 2.3MPa, close and open the solenoid valve 51 of the electromagnetic thermal expansion valve for three consecutive times, and the reading value of the _P2 pressure gauge 6 is within the required range, which means the valve opening capability is normal.

Since the existing electromagnetic thermal expansion valve test method needs to test the performance of the electromagnetic valve and the performance of the thermal expansion valve separately, the existing electromagnetic thermal expansion valve has many performance testing procedures and low test efficiency, which cannot meet the current mass production requirements. production requirements.

Contents of the invention

The purpose of the performance testing device of the electromagnetic thermal expansion valve described in the utility model is to solve the above-mentioned problems and deficiencies, and provide a new type of testing device for the electromagnetic thermal expansion valve. Widely used in performance testing of various electromagnetic thermal expansion valves.

The performance testing device of the electromagnetic thermal expansion valve of the utility model mainly includes a first air inlet path, an air storage tank, a second air inlet path, an electromagnetic thermal expansion valve, a third air outlet path, a second air outlet path, a first air outlet path and a second air outlet path. Combination of four solenoid valves, etc., characterized in that: the first air intake route is composed of a low-pressure regulating valve, a P ₃ pressure gauge, and a first solenoid valve. The second air intake route consists of a medium pressure regulating valve, a second solenoid valve, a P ₁ pressure gauge, a high pressure regulating valve and a third solenoid valve. The first air outlet route consists of a _P2 pressure gauge, a fifth solenoid valve, and a throttle orifice. The second air outlet route is composed of the sixth electromagnetic valve. The third air outlet route is composed of the seventh solenoid valve and a flow meter. The first air intake path is connected to the B port of the electromagnetic thermal expansion valve. The second air intake path is connected to the A port of the electromagnetic thermal expansion valve. The first gas outlet, the second gas outlet and the third gas outlet are connected in parallel to the C interface of the electromagnetic thermal expansion valve.

The utility model also includes the following additional technical features: a fourth electromagnetic valve is connected in series between the first air intake path, the first air outlet path, the second air outlet path, and the third air outlet parallel pipeline.

The performance testing device is controlled by PLC, and all performance tests can be completed once started.

All the solenoid valves are normally closed solenoid valves.

The first air intake path, the second air intake path, the first air outlet path, the second air outlet path and the third air outlet path of the utility model can realize the test switch among various performances of the electromagnetic thermal expansion valve. The leakage test of the balance part of the electromagnetic thermal expansion valve can be realized when the first air inlet path and the third air outlet path are switched. The static superheat test of the electromagnetic thermal expansion valve can be realized when the medium-pressure gas in the second air inlet path and the first air outlet path are switched. The internal leakage test of the electromagnetic thermal expansion valve can be realized when the medium-pressure gas in the second air inlet path and the third air outlet path are switched. When switching the high-pressure gas in the second air intake path and the second air outlet path, the high-pressure valve opening capability test can be realized.

The utility model is described in further detail below in conjunction with accompanying drawing and specific embodiment.

Description of drawings

Fig. 1 is known a kind of static superheat test structure diagram of electromagnetic thermal expansion valve;

1-Electromagnetic thermal expansion valve, 11-Electromagnetic thermal expansion valve solenoid valve, 2-P ₁ pressure gauge, 3-Pressure regulating valve, 4-P ₂ pressure gauge, 5-Second solenoid valve, 6-Throttling orifice plate, 7 - First solenoid valve.

Fig. 2 is a leak test structure diagram of a balance part of a known electromagnetic thermal expansion valve;

1-pressure gauge, 2-pressure regulating valve, 3-electromagnetic thermal expansion valve, 31-electromagnetic thermal expansion valve electromagnetic 4-second electromagnetic valve, 5-flow meter, 6-first electromagnetic valve.

Fig. 3 is a structural diagram of an internal leakage test and a valve opening capability test of a known electromagnetic thermal expansion valve;

1-medium pressure regulating valve, 2-high pressure regulating valve, 3-P ₁ pressure gauge, 4-first solenoid valve, 5-electromagnetic thermal expansion valve, 51-electromagnetic thermal expansion valve solenoid valve, 6-P ₂ pressure gauge, 7-Second solenoid valve, 8-Third solenoid valve, 9-Flow meter, 10-Fourth solenoid valve.

Fig. 4 is the structural diagram of the performance testing device of the electromagnetic thermal expansion valve of the present invention;

1-First air intake, 11-Low pressure regulating valve, 12- P ₃ pressure gauge, 13-First solenoid valve, 2-Air storage tank, 3-Second air intake, 31-Medium pressure regulating valve, 32- Second solenoid valve, 33-high pressure regulating valve, 34-second solenoid valve, 35-P ₁ pressure gauge, 4-electromagnetic thermal expansion valve, 41-electromagnetic thermal expansion valve solenoid valve, 5-third air outlet, 51- Seventh solenoid valve, 52-flow meter, 6-second air outlet, 61-sixth solenoid valve, 7-first air outlet, 71-P ₂ pressure gauge, 72-fifth electromagnetic valve, 73-throttle hole Plate, 8-fourth solenoid valve.

Detailed ways

As shown in Figure 4, the performance testing device of the electromagnetic thermal expansion valve of the present invention mainly includes a first air intake path 1, an air storage tank 2, a second air intake path 3, an electromagnetic thermal expansion valve 4, and a third air outlet path 5 , the second air outlet 6, the first air outlet 7 and the fourth electromagnetic valve 8, etc. It is characterized in that: the first air inlet 1 is composed of a low-pressure regulating valve 11, a P ₃ pressure gauge 12, a first electromagnetic Valve 13 is composed. The second air intake path 3 is composed of a medium pressure regulating valve 31 , a second solenoid valve 32 , a P ₁ pressure gauge 35 , a high pressure regulating valve 33 and a third solenoid valve 34 . The first air outlet 7 is composed of a P ₂ pressure gauge 71 , a fifth solenoid valve 72 , and a throttle orifice 73 . The second air outlet 6 is composed of a sixth solenoid valve 61 . The third air outlet 5 is composed of a seventh solenoid valve 51 and a flow meter 52 . The first air intake path 1 is connected to the B port of the electromagnetic thermal expansion valve 4 . The second air inlet 3 is connected to the A port of the electromagnetic thermal expansion valve 4 . The first gas outlet 7 , the second gas outlet 6 and the third gas outlet 5 are connected in parallel to the C interface of the electromagnetic thermal expansion valve 4 . The fourth solenoid valve 8 is connected in series between the first air inlet passage 1 and the first air outlet passage 7 , the second air outlet passage 6 , and the third air outlet passage 5 in parallel. The performance testing device is controlled by PLC, and all performance tests can be completed once started. All the solenoid valves are normally closed solenoid valves.

Electromagnetic thermal expansion valve performance test process is as follows:

Open the equipment, install the electromagnetic thermal expansion valve 4 on the electromagnetic thermal expansion valve measuring device of the present utility model, open the second electromagnetic valve 32, and adjust the gauge pressure of the _P1 pressure gauge 35 to 1.03±0.05 with the medium pressure regulating valve 31 MPa, open the fourth electromagnetic valve 8, so that the electromagnetic thermal expansion valve electromagnetic valve 41 is in an open state. After closing and opening the fifth solenoid valve 72 for three consecutive times, the pressure shown by the _P2 pressure gauge 71 is the static superheat value. Close the fifth solenoid valve 72, close the fourth solenoid valve 8, open the sixth solenoid valve 61, open and close the electromagnetic thermal expansion valve solenoid valve 41 for three consecutive times, make the electromagnetic thermal expansion valve 41 in the closed state, and close the sixth solenoid valve 61. Open the seventh solenoid valve 51 and pass the flow rate value shown by the flow meter 52 to the internal leakage value. Close the second solenoid valve 32, close the seventh solenoid valve 51, open the sixth solenoid valve 61, open the third solenoid valve 34, adjust the gauge pressure of the _P1 pressure gauge 35 to 2.3MPa with the high pressure regulating valve 33, open and close the solenoid valve After the solenoid valve 41 of the thermal expansion valve has been operated for three consecutive times, the reading value of the _P2 pressure gauge 71 is within the required range, which means that the valve opening capability is normal. Close the third solenoid valve 34, close the sixth solenoid valve 61, open the first solenoid valve 13, make the solenoid valve 41 of the electromagnetic thermal expansion valve open, and adjust the gauge pressure of the _P3 pressure gauge 12 to 0.2MPa with the low pressure regulating valve 11 , open the seventh solenoid valve 51, the value shown by the flow meter 52 is the leakage value of the balance part.

The above examples are only used to illustrate rather than limit the technical solutions of the present utility model. Any modification or partial replacement that does not depart from the spirit and scope of the present utility model shall fall within the scope of claims of the present utility model.

Claims (4)

1. A performance testing device for an electromagnetic thermal expansion valve, mainly comprising a first air inlet (1), an air storage tank (2), a second air inlet (3), an electromagnetic thermal expansion valve (4), and a third air outlet Road (5), the second air outlet (6), the first air outlet (7) and the fourth solenoid valve (8), characterized in that: the first air inlet (1) is composed of a low-pressure regulating valve (11), P ₃ pressure gauge (12), the first electromagnetic valve (13); the second air intake path (3) is composed of medium pressure regulating valve (31), second electromagnetic valve (32), P ₁ pressure gauge (35), high-pressure regulating valve (33), the third solenoid valve (34); the first air outlet (7) is composed of P ₂ pressure gauge (71), the fifth solenoid valve (72), throttle orifice (73 ) composition; the second air outlet (6) is made up of the sixth electromagnetic valve (61); the third air outlet (5) is made up of the seventh electromagnetic valve (51) and flow meter (52); the first air inlet (1) is connected with the B port of the electromagnetic thermal expansion valve (4); the second air intake path (3) is connected with the A port of the electromagnetic thermal expansion valve (4); the first air outlet path (7), the second The second gas outlet (6) and the third gas outlet (5) are connected in parallel to the C interface of the electromagnetic thermal expansion valve (4). 2. The performance testing device of the electromagnetic thermal expansion valve according to claim 1, characterized in that: the first air inlet path (1) and the first air outlet path (7), the second air outlet path (6), the first air outlet path The fourth solenoid valve (8) is connected in series between the parallel pipelines of the three outlets (5). 3. The performance testing device of the electromagnetic thermal expansion valve according to claim 1, characterized in that: the performance testing device is controlled by PLC, and all performance tests can be completed once started. 4. The performance testing device of electromagnetic thermal expansion valve according to claim 1, characterized in that: the first solenoid valve (13), the second solenoid valve (32), the third solenoid valve (34), the fourth solenoid valve Solenoid valve (8), the 5th solenoid valve (72), the 6th solenoid valve (61), the 7th solenoid valve (51) are normally closed solenoid valves.