| 摘要 |
<p>PROBLEM TO BE SOLVED: To expand a range of continuous operation during an operation of a dehumidifying machine. SOLUTION: When an electromagnetic valve 35 is closed, an evaporating pressure of refrigerant at an upstream side is adjusted to a higher pressure by an evaporating pressure adjusting valve 36 so as to prevent an evaporator from being frosted. An ON/OFF signal for a dehumidifying machine together with a set value such as a temperature or a humidity is inputted to a discriminating part 41 of a non-frost operation control part 4. When the dehumidifying machine is turned off, the electromagnetic valve 35 is closed at an output part 42 only when a point P of the set value is placed within a first range A so as to perform a non-frost operation. However, when the dehumidifying machine is turned on, it is changed over in such a way that its non-frost operation can be carried out even if the setting point P is in a second range B. Accordingly, in the case that the dehumidifying machine is turned on, a non-frost operation state is also set in a second range B, so that it is possible to expand a continuous operation range without attaining any defrosting. In this case, although a dehumidifying capability with a freezer is low, a low temperature operating condition is fulfilled by a dehumidifying capability of the dehumidifying machine.</p> |
