| 摘要 |
The control system is for a refrigerator cooling a heattransfer fluid, reducing the output where this is excessive so as to reduce the discrepancy between the actual fluid temp. and a preset desired one. An input unit (19) supplies two different threshold temperatures, fed in manually, below the desired one to a processor (17). Where the actual temp. is between the desired one and the upper threshold one this maintains the refrigerator output. If it falls between the threshold values, the processor reduces refrigerator speed by a first amount, and if below the lower one by a second and greater amount.
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