Patent ID: 7647789

Claim:
An evaporator unit comprising: an ejector having a nozzle for decompressing refrigerant, and a refrigerant suction port, from which refrigerant is drawn by a high-speed flow of refrigerant jetted from the nozzle; an upwind side heat exchanger located at an upwind side of air flow for exchanging heat with refrigerant, wherein the upwind side heat exchanger evaporates a discharge side refrigerant flowing out of an outlet of the ejector; and a downwind side heat exchanger located at a downwind side of the upwind side heat exchanger in the air flow, wherein at least a part of the downwind side heat exchanger evaporates a suction side refrigerant to be drawn into the refrigerant suction port of the ejector, the upwind side heat exchanger has a refrigerant superheat area, which is offset from a refrigerant superheat area of the downwind side heat exchanger in a direction perpendicular to the air flow, the upwind side heat exchanger has an upwind tank extending in a tank longitudinal direction and an upwind heat exchanging portion, and the downwind side heat exchanger has a downwind tank extending in the tank longitudinal direction adjacent to the upwind tank and a downwind heat exchanging portion; and the ejector is arranged in the downwind tank to extend along the tank longitudinal direction.