| 摘要 |
<p>A control device (7) for a refrigeration circuit comprises a tubular casing (71), a first dividing wall (72) which has a plurality of holes (721), a second dividing wall (73) which has a throat (731), and a third dividing wall (74) which has an orifice (742). A first bellows (76) is disposed between the first dividing wall (72) and the second dividing wall (73), and a first valve element (75) is mounted on one end of the bellows (76) for changing the flow volume of the refrigerant through the throat (731). A second bellows (78) is disposed between the second dividing wall (73) and the third dividing wall (74) and provided with a second valve element (77) on one end and which extends along the throat (731) so as to urge the first valve element (75) away from the throat (731) whenever there is an abnormal reduction of refrigerant pressure around the second bellows (78). In this way, loss of some refrigerant from the refrigeration circuit cannot result in the control device (7) stopping all flow round the circuit, which would result in overheating of a compressor forming part of the circuit.</p> |
