| 摘要 |
PURPOSE:To prevent a dew formation on the surface of a member around a condensor just after a rapid cooling operation by a method wherein just after performing the first operation, the second operation for forcedly stopping and operating a compressor is carried out and an air blower is not operated during the second operation. CONSTITUTION:A rapid cooling switch 12 is turned ON and after a predetermined time elapses, an L signal is inputted to the two inputs of an OR circuit 26, an L signal is also output from an output of the OR circuit 26, an L signal is inputted to one input of an AND circuit 27. The AND circuit 27 outputs an L signal irrespective of an output signal from the OR circuit 17 of the freezing chamber temperature control part 15. Accordingly, a transistor 28 is turned OFF and an electrical conduction for a relay coil 29 is shut off, the second relay contact point 22 is released and then the second air blower 11 is stopped. Due to this fact, during OFF-ON cycle operation of the rotary compressor just after the rapid cooling operation is carried out, the second air blower 11 is stopped without fail, a temperature of coolant is not decreased, the hot coolant is fed to the condensor, a temperature of the member around the condensor is not decreased and the dew formation is not generated. |
