What are the technical requirements for the air conditioning electronic expansion valve life test bench?

　　
This equipment is suitable for endurance testing of electronic expansion valves and solenoid valves. It utilizes an industrial computer and PLC as the central control center, with PC programs responsible for data processing and logic control. It offers easy operation and flexible adjustments. What are the technical requirements for an air conditioning electronic expansion valve life test bench? Let's take a look at how Guangzhou Zhipinhui Electronic Technology describes it.

1. Number of test stations: 5. By replacing the test fixture, electronic expansion valves and solenoid valves can be tested for life and leakage (leakage is tested using the pressure-maintaining method).

2. Electronic Expansion Valve Testing:

① Secure the expansion valve to the life test bench and drive it with a set voltage (e.g., DC12V), a specified excitation method, and a set frequency (e.g., 83 PPS).

② Set the inlet (side pipe) pressure to 1.0 MPa, and the outlet (straight pipe) to atmosphere. Open and close the valve a set number of times (e.g., 100,000) in a cycle of 0 to 500. Use nitrogen or clean compressed air,
with a source pressure of ≥4.5 MPa.

The test pressure is manually adjustable from 1 to 3.5 MPa.

Note: The valve supports opening and closing cycles up to 9.99 million times. The purpose is to determine the maximum life of the electronic expansion valve.