Patent ID: 8424338
Filing Date: 2013-04-23
Classification: F25B

Abstract:
1. A vapor compression refrigerating cycle apparatus comprising: a compressor drawing and compressing refrigerant; a radiator radiating heat of high-pressure refrigerant discharged from the compressor; a first throttle device decompressing refrigerant discharged from the radiator into gas and liquid phase refrigerant; a flow distributor that includes a base passage extending in an extending direction in communication with the first throttle device, a first passage in direct communication with the base passage that continuously extends from a downstream end of the base passage, a second passage in direct communication with the base passage that continuously extends from the base passage at a position upstream from the downstream end of the base passage, the second passage extending in a direction different from the extending direction of the base passage, the flow distributor separating the gas and liquid phase refrigerant discharged from the first throttle device into the first passage and the second passage; an ejector that includes a nozzle portion, a suction portion and a pressure-increase portion, the nozzle portion being in communication with the first passage and decompressing and expanding refrigerant passing through the first passage, the suction portion drawing refrigerant by a jet flow of refrigerant from the nozzle portion, the pressure-increase portion mixing refrigerant drawn from the suction portion with the refrigerant jetted from the nozzle portion to increase pressure of refrigerant; a first evaporator evaporating refrigerant discharged from the ejector and discharging evaporated refrigerant toward the compressor; a suction passage extending from the second passage to the suction portion of the ejector; a second throttle device disposed on the suction passage, the second throttle device decompressing and expanding refrigerant passing through the suction passage; and a second evaporator disposed on the suction passage downstream of the second throttle device, the second evaporator evaporating the refrigerant passing through the suction passage, wherein the flow distributor adjusts a ratio of a flow rate of refrigerant passing through the second passage to a flow rate of refrigerant passing through the first passage in accordance with a heat load of at least one of the radiator, the first evaporator and the second evaporator, the flow distributor adjusts dryness of the refrigerant passing through the first passage to be smaller than dryness of the refrigerant passing through the second passage in a first load condition where the heat load is lower than a predetermined load, the flow distributor adjusts the dryness of the refrigerant passing through the first passage to be larger than the dryness of the refrigerant passing through the second passage in a second load condition where the heat load is higher than the predetermined load; the first load condition is a condition where a flow rate of refrigerant discharged from the compressor is lower than a predetermined rate; and the second load condition is a condition where the flow rate of refrigerant discharged from the compressor is higher than the predetermined rate.