| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To expand a temperature adjustment range to be adapted only by adjusting a freezing circuit in fluid cooling using an evaporator. <P>SOLUTION: When a compressor suction pressure set value pss corresponding to an evaporator exit temperature set value tos of a cooled fluid is an upper limit psu or less, an evaporator exit temperature (to) of the cooled fluid is adjusted to be the set value tos by adjusting evaporation pressure pe by adjusting a compressor output G, while an evaporation pressure control valve MVe is fully open as a low-temperature mode operation. When the compressor suction pressure set value pss is higher than the upper limit psu, the compressor suction pressure ps is adjusted to be the upper limit psu by adjusting the compressor output G as a high temperature mode operation, and the evaporation exist temperature (to) of the cooled fluid is adjusted to the set value tos by adjusting the evaporation pressure pe by adjusting opening of the evaporation pressure control valve MVe. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
