Sanyo Electric Co., Ltd.

Hiroshi Taniguchi

Hiroshi Tamayama

Satoshi Ohya

A refrigerating apparatus which is capable of accurate and swift correspondence to a transient change of a refrigerant circuit or an accumulated deviation of the degree of superheat of a refrigerant, thereby releasing the state in which the liquid refrigerant is flowing back to the compressor and the overheated state, and a method of controlling such a refrigerating apparatus. The refrigerating apparatus comprises a refrigerant circuit composed of a condenser, an expansion valve and an evaporator which are connected to each other in series, a means for detecting the evaporating temperature of the refrigerant, a means for detecting the exit temperature of the evaporator, and a control means for controlling the opening of the expansion valve on the basis of the evaporating temperature of the refrigerant and the exit temperature of the evaporator in accordance with a fuzzy reasoning.

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Oizumi, Japan

Hiroshi Taniguchi