| 摘要 |
PURPOSE:To save energy by controlling a solenoid valve by means of a thermostat device for detecting lubricating oil temperature so as to keep the compressor temperature at a proper level. CONSTITUTION:When the temperature of lubricating oil 2 is relatively high in the summer season, a solenoid valve 5 is kept in an open state by the operation of a thermostat device 9, an approximately the total amount of refrigerant gas flows through the refrigeration circuit A to a condenser 6 by the operation of a resistance tube 4 of the second refrigeration circuit, so that high temperature refrigerant gas flows through a lubricating oil heating pipe 3 of the second refrigeration circuit B, hardly heating lubricating oil 2. On the contrary, when the temperature of the lubricating oil 2 is low in the winter season, the solenoid valve 5 of the first refrigeration circuit A keeps a closed state, and all the high temperature refrigeration gas flows through the lubricating oil heating pipe 3 of the second refrigeration circuit B to heat the lubricating oil 2, allowing the temperature to be properly kept. |
