Heat pump system

摘要

A heat pump system in which a by-passing passage is provided for connecting a high pressure segment of a primary refrigerant passage with a low pressure segment of the primary refrigerant passage, a secondary pressure reduction means is disposed in the by-passing passage to produce two phases of the refrigerant (gas-liquid state) and the pressure of the refrigerant is continuously detected by sensing saturated temperatures of the two phases both upstream and downstream of the secondary pressure reduction means for controlling the operation of the system.