| 摘要 |
<P>PROBLEM TO BE SOLVED: To operate an ejector type refrigerating cycle while bringing a flow rate ratio η into a value closely near to the optimum flow rate ratio ηmax and while exhibiting a high cooling capacity as the whole cycle, in the ejector type refrigerating cycle provided with a plurality of evaporators including the evaporator arranged in a branch passage branched from an ejector upstream. <P>SOLUTION: A refrigerant passage area of a nozzle part 15a of an ejector 15 and a throttle opening of a fixed throttle 19 are appropriately set so that when a first evaporator 16 outlet side refrigerant superheat degree becomes a prescribed value, the flow rate ratio η that is the ratio of a refrigerant flow rate Gnoz of the nozzle part 15a and a refrigerant flow rate Ge sucked by a refrigerant suction port 15b exhibits a high cooling capacity as the whole cycle. Further, the refrigerant flow rate of the whole cycle is controlled so that the first evaporator 16 outlet side refrigerant superheat degree becomes the prescribed value by a variable throttle mechanism 31 arranged in a refrigerant passage from a radiator 12 outlet side to a branch part Z inlet side. <P>COPYRIGHT: (C)2009,JPO&INPIT |
