초록 ▼

An air conditioning apparatus suitable for an electric powered automobile, where at least one of a heating and a dehumidifying operation is effected by utilizing a refrigerating cycle. An upstream heat exchanger and a downstream heat exchanger are arranged in a duct through which air passes for air

An air conditioning apparatus suitable for an electric powered automobile, where at least one of a heating and a dehumidifying operation is effected by utilizing a refrigerating cycle. An upstream heat exchanger and a downstream heat exchanger are arranged in a duct through which air passes for air conditioning. An outside heat exchanger with an outside fan are further provided, which act as a condenser in a cooling mode, although a refrigerant passes therethrough when using the heating and the dehumidifying modes. Upon use of a dehumidifying mode, the upstream heat exchanger acts as an evaporator, while the downstream heat exchanger acts as a condenser. The temperature of the refrigerant sensed by a temperature sensor at the outlet of the compressor if higher than a predetermined value (110°C.) when in the dehumidifying mode causes the outside fan to rotate, thereby increasing the condensing ability at the outside heat exchanger, reducing the amount of liquid refrigerant in the outside heat exchanger, and increasing the amount of liquid refrigerant in an accumulator, thereby preventing the temperature of the refrigerant from the compressor from increasing.

대표청구항 ▼

An air conditioning system for a cabin to be air conditioned, comprising: a duct for introducing an air flow into the cabin; a blower for generating air flow in the duct; an upstream heat exchanger arranged in the duct for a heat exchange of a refrigerant with the air flow in the duct; a downstream

An air conditioning system for a cabin to be air conditioned, comprising: a duct for introducing an air flow into the cabin; a blower for generating air flow in the duct; an upstream heat exchanger arranged in the duct for a heat exchange of a refrigerant with the air flow in the duct; a downstream heat exchanger arranged in the duct downstream of said upstream heat exchanger for a heat exchange of the refrigerant with the air flow in the duct; an outside heat exchanger located to an outside of the duct for a heat exchange of the refrigerant with air outside of the cabin; a pressure reduction device for reducing a pressure of the refrigerant; a compressor for compressing the refrigerant; a refrigerant container for storing an excessive amount of said refrigerant and for supplying a proper amount of said refrigerant to said compressor; a refrigerant circuit for connecting the upstream heat exchanger, downstream heat exchanger, the outside heat exchanger, the pressure reducing device, the refrigerant container and the compressor, the refrigerant circuit having a dehumidifying mode wherein the compressed refrigerant from the compressor flows, in order, through the downstream heat exchanger, the outside heat exchanger, the pressure reduction device, the upstream heat exchanger, the refrigerant container, and the compressor; means for varying the heat exchange between the refrigerant and the outside air at the outside heat exchanger; means for detecting the temperature of the compressed refrigerant flowing from an outlet of the compressor before being heat exchanged; and means for variably controlling the heat exchange varying means to increase the heat exchange at the outside heat exchanger when the temperature of the refrigerant flowing from the compressor detected by the detecting means exceeds a predetermined value; wherein said refrigerant container retains an amount of said refrigerant.