Скачать или смотреть reversing valve troublshooting and function

The four-way valve consists of three parts:

pilot valve

main valve

solenoid coil

The solenoid coil can be removed. The pilot valve and the main valve are welded together.

A brief introduction to the working principle of the four-way valve:

When the electromagnetic coil is in a power-off state, as shown in the figure below: the pilot slide valve ② moves to the right under the drive of the compression spring ③, and the high-pressure gas enters the capillary tube ① and then enters the piston cavity ⑤. On the other hand, the gas in the piston cavity ④ is discharged. There is a pressure difference, the piston and the main slide valve ⑥ move to the right, so that the E and S pipes are connected, and the D and C pipes are connected, thus forming a refrigeration cycle as shown in the figure.