To prevent the delay of cooling when a compressor is in overload, by providing a valve which can be opened and closed freely, in the position in which to bypass the high pressure side and the low pressure side of a freezing cycle, and opening the valve for a short time if lock occurs when a compressor is in overload at start so as to balance the pressure, and then, restarting the compressor again.
When an ON signal is inputted into a compressor control means, this controller starts compressor 1, and unless a lock means 9 detects lock, this continues the operation of the compressor 1, and if it detects the lock, this stops the compressor 1. A valve 6, which can be opened and closed freely, is provided in the position in which to bypass the high pressure side and the low pressure side of a freezing cycle, and it is opened for a short time if lock occurs at start of the compressor so as to balance the pressure, and then the compressor 1 is started again. Hereby, even if the compressor is in overload condition and lock occurs, the delay of cooling can be prevented by restarting compressor after balancing the pressure between the discharge side and the suction side of the compressor quickly.
| WO/2023/203863 | REFRIGERATED CONTAINER |
| WO/2021/112027 | STORAGE CHAMBER |
ODA MASATAKA
KAMITSUJI TOSHIO
ENDO KATSUMI
