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(11) | EP 2 075 516 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Refrigeration unit for land transportation and operation control method of refrigeration unit for land transportation |
| (57) An operation control method of a 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 can be respectively created
for a plurality of freezing sections which are distributedly arranged with the plurality
of evaporator units, comprising: 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.
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