| 摘要 |
<p>1,226,111. Valves. SOC. ANON. FRANCAISE DU FERODO. 8 April, 1968 [20 April, 1967], No. 16886/68. Heading F2V. [Also in Divisions F4 and G2-G3] A vacuum regulator for use in a vehicle airconditioning system comprises a self-lapping valve in which a diaphragm 49 co-operates with the top of a tubular valve member 28 to control communication between inlet and outlet chambers 22, 101 via the bore 31. The outlet vacuum seats the diaphragm against the action of leaf spring 82. Member 28 also co-operates with ring 37 to control communication between outlet chamber 101 and atmospheric chamber 26. A unitary or composite ring 25 biases member 28 upwards. The outlet pressure is adjusted by rotating cam 61 to vary the load exerted by spring 82. Calibration of the latter is effected by screw 93. The spring 82 may be of thermally responsive bi-metal construction or screw 93 may be replaced by a thermal element. In Fig. 6, a bi-metal spring 102 is adjusted by diaphragm 50<SP>1</SP> which responds to a pressure in 130 as determined by a remote valve of the Fig. 2 construction. The spring pivots at 127 to control a further regulator 10. In an exemplary system (Fig. 7, not shown), a manually-controlled regulator (203) as in Fig. 2 controls a jack to vary the air flow across a radiator (212). The air temperature is sensed by the bi-metal spring of a regulator (R, C) as in Fig. 4, and the latter controls the water flow through the radiator. Regulator (R, C) is controlled by a regulator (208) similar to (203).</p> |
