| 摘要 |
<p>1,202,620. Defrosting. MATSUSHITA ELECTRONICS CORP. 19 Aug., 1968 [31 Aug., 1967], No. 39525/68. Heading F4H. [Also in Divisions G1 and H3] Defrosting of a refrigerator is initiated by a timer only if the temperature of the evaporator, as measured by a thermistor, is sufficiently low (indicating presence of ice) and is automatically stopped when the temperature of the thermistor reaches a predetermined value (indicating removal of the ice). Defrosting may be carried out by an electric heater or by hot gas.</p> |
