What are the test methods for automotive electronic expansion valves, solenoid valves, and four-way valve performance test benches?

　　
The equipment tests the stability and reliability of electronic expansion valves by setting different ambient temperature and humidity conditions, as well as different air conditioning system operating states. Let's take a look at the testing procedures for automotive electronic expansion valves, solenoid valves, and four-way valve performance testing benches at Guangzhou Zhipinhui Electronic Technology.

　　This device is suitable for performance testing of both electronic expansion valves and solenoid valves, including four-way valves. For electronic expansion valves, it can perform standard flow tests, valve opening pulse tests, maximum operating differential pressure tests, reverse valve opening differential pressure tests, and leakage tests. For solenoid valves, it can perform flow tests, internal leakage tests, response time tests, and maximum operating differential pressure tests. For four-way valves, it can perform flow characteristic tests, maximum operating differential pressure tests, and internal leakage tests. Full PLC monitoring is provided, and a custom pulse driver board is used for valve opening degree testing. The pulse number and frequency can be customized to provide precise response. A gas flow meter is used to measure air flow, valve leakage, and valve opening pulses at various opening degrees of the electronic expansion valve. This device effectively detects the corresponding flow conditions of the electronic expansion valve at various pulse opening values. Air pressure, leakage, pulse parameters, test time, and upper and lower flow rate alarm limits are all adjustable. The device's testing principle is scientific and reliable, and operation is simple. It is an ideal auxiliary testing device for manufacturers.