| 摘要 |
PURPOSE:To aim at making a shortage of lubrication preventable, by causing a rise in temperature to be produced in advance comparing with a rise in the pressure being immediately after starting, while reducing solubility of refrigerant being immediately after starting. CONSTITUTION:When operation command is given and the temperature of a compressor is below the setting temperature, a selector switch 4 is connected so as to cause a transformer 3 to be energized with current and thereby a motor 3 is provided with a low voltage. For this reason, the compressor is not started and the coil of the motor 2 is turned to a heating element which heats the compressor. As the result, if compressor's temperature becomes more than the set level, a commercial power source 1 is fed to the motor 2 by turning the selector switch 4, starting the motor 2 to carrying out its normal operation. Accordingly, dissolution of the refrigerant into lubricating oil can be checked whereby 'bumping' does not happen and thus seizure of binding trouble can be obviated. |
