Patent ID: 6935421
Filing Date: 2005-08-30
Classification: B60H,F25B

Abstract:
1. An air conditioner for a compartment, comprising: a compressor for compressing and discharging refrigerant; an exterior heat exchanger for performing heat exchange between refrigerant and outside air outside the compartment; an interior heat exchanger for performing heat exchange between refrigerant and air to be blown into the compartment; an ejector for decompressing refrigerant discharged from the compressor while sucking gas refrigerant from one of the interior heat exchanger and exterior heat exchanger, and for converting expansion energy to pressure energy to increase pressure of refrigerant to be sucked to the compressor; a heater core disposed for heating air to be blown into the compartment by using a fluid flowing therein as a heating source; a fluid-refrigerant heat exchanger disposed to perform heat exchange between refrigerant discharged from the compressor and the fluid to be supplied to the heater core; first and second throttles for decompressing refrigerant in substantially iso-enthalpy; and a switching unit for changing a refrigerant flow to switch one of a first operation where the compartment is cooled, a second operation where the compartment is dehumidified while being heated, and a third operation where the compartment is heated, wherein; when refrigerant is evaporated in the interior heat exchanger to cool air passing through the interior heat exchanger, refrigerant is decompressed in the ejector; in the first operation, refrigerant after being decompressed is evaporated in the interior heat exchanger to cool air passing therethrough, and high-pressure refrigerant discharged from the compressor is decompressed in the ejector while sucking gas refrigerant from the interior heat exchanger; in the second operation, refrigerant after being decompressed is evaporated in the interior heat exchanger to cool and dehumidify air passing therethrough, and high-pressure refrigerant discharged from the compressor is decompressed by the first throttle; and in the third operation, high-temperature refrigerant before being decompressed flows into the interior heat exchanger to heat air passing therethrough, and the high-pressure refrigerant is decompressed in the second throttle.