| 摘要 |
PROBLEM TO BE SOLVED: To provide an operation control method of a refrigeration unit for land transportation, reducing non-cooling risks of a low temperature set side refrigeration section, and carrying out inexpensive and user-friendly highly accurate temperature control. SOLUTION: The operation control method of the refrigeration unit for land transportation in which a plurality of evaporator units are parallelly connected into a refrigerant circuit 10 for circulating a refrigerant by a compressor 11 driven by a dedicated drive source, and a plurality of different transport temperatures are respectively created for a plurality of freezing sections which are distributedly arranged with the plurality of evaporator units, includes: employing throttle mechanisms whose opening degrees are adjustable, as well as providing a low pressure sensor 18 which detects the evaporating pressure of the refrigerant from the evaporator units, for the refrigerant circuit 10; and performing a priority control for lower setpoint temperature which preferentially distributes the refrigerant to an evaporator unit having a lower setpoint temperature, when a plurality of operation requests have been made for a plurality of the evaporator units, during a various temperature cooling operation having different setpoint temperatures for the respective freezing sections. COPYRIGHT: (C)2009,JPO&INPIT |
