How to perform valve testing on the air conditioning valve body life test bench

　　

As a key device to measure the quality and life of air conditioning valves, this test bench is widely used in various links of product development, production and quality inspection. How does the air conditioning valve body life test bench conduct valve testing? Let's see what Guangzhou Zhipinhui Electronic Technology has to say.

　　①Fix the expansion valve on the life test bench and drive it with a set voltage (such as DC12V), a specified excitation mode, and a set frequency (such as 83PPS).

②The inlet (side pipe) pressure is 1.0MPa, and the outlet (straight pipe) is connected to the atmosphere; 0←→500 is a cycle, and the total opening and closing is the set number of times (such as 100,000 times). Use nitrogen or clean compressed air, and the gas source pressure is ≥4.5MPA;

The test pressure is 1~3.5MPa and can be adjusted manually.

Note: It supports opening and closing up to 9.99 million times, and the purpose is to find the maximum life of the electronic expansion valve.

③. Failure judgment: Read the pressure through the pressure sensor, set the full closing pressure and valve opening pressure on the software to detect the change of intake pressure. When the intake pressure exceeds the set value, the system alarm prompts the failure of the test piece and records the current number of operations and other parameters.