| 摘要 |
<p>1,152,350. Valves. CONTROLS CO. OF AMERICA. 7 Nov., 1966 [10 Feb., 1966], No. 49751/66. Heading F2V. [Also in Division F4] The flow of refrigerant to an evaporator is controlled by the valve member 44. A datum flow is set by the controlled heating of a bimetallic member 56 through an electric heating element 60 and variable resistor (78), Fig. 1 (not shown). Member 56 acts against a biasing spring 68. In operation the valve is further controlled by refrigerant leaving the evaporator and communicating through a connection 80 with a chamber 85 which houses the bimetallic member so that the cooling effect of any liquid refrigerant entering this chamber tends to close the valve rapidly. Transient effects or hunting are avoided by a gauze 86 in the connection 80. In the event of overload the evaporator outlet pressure communicated through chamber 85 and passage 100 to a bellows 96 opens a by-pass valve 92 allowing liquid refrigerant from the main valve chamber to enter the chamber 85 and effect shut-down owing to rapid cooling.</p> |
