Daikin VRV – Structure and Operation of Solenoid Valve

Liquid Injection
In order to prevent overheating operation of compressor, refrigerant is injected to compressor suction port from liquid line reducing pressure through capillary tube. The operation is as follows;
Plunger which is a slide part inside valve body lifts to make a flow of refrigerant when the coil is energized, while when not energized, the plunger lowers to contact with valve seat due to spring force, and shuts the flow of refrigerant.

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