Heat pump type air conditioner for automotive vehicle
First Claim
1. A heat pump type air conditioner for an automotive vehicle, comprising:
- refrigerant;
a compressor applying a workload to said refrigerant;
a condenser connected to a refrigerant discharge side of said compressor and radiating heat of said refrigerant into ambient air;
a blower leading air for air-conditioning the passenger compartment of the automotive vehicle;
a heat-radiating inner heat exchanger connected to the refrigerant discharge side of said compressor and transmitting the heat of said refrigerant to the air led by said blower;
an expansion valve connected to a refrigerant outlet side of said heat-radiating inner heat exchanger;
an evaporator connected to a refrigerant outlet side of said expansion valve, said evaporator transmitting the heat of the air led by said blower to said refrigerant which is supplied through said expansion valve from at least one of said condenser and said heat-radiating inner heat exchanger;
a switching device disposed among the refrigerant discharge side of said compressor, said switching device being set at one of a first state in that said compressor is fluidly communicated with said condenser and a second state in that said compressor is fluidly communicated with said heat-radiating inner heat exchanger; and
means for lowering a cooling efficiency of said evaporator for a predetermined time when said compressor is started.
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Accused Products
Abstract
A heat pump type air conditioner for an automotive vehicle has a compressor whose outlet is connected to a condenser and a heat-radiating inner heat exchanger through a three-way valve. The heat-radiating inner heat exchanger is connected to an evaporator through an expansion valve. The evaporator is connected to an inlet of the compressor. During a cooling operation, the three-way valve is set to lead the refrigerant from the compressor to the condenser. During a heating operation, the three-way valve is set to lead the refrigerant from the compressor to the heat-radiating inner heat exchanger while bypassing the condenser. A control unit controls such that a cooling efficiency of the condenser is lowered for a predetermined time when the compressor is started. Therefore, the heating operation is securely implemented, and a start-up period in starting is shortened. Furthermore, the freezing of the condenser is avoided.
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Citations
17 Claims
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1. A heat pump type air conditioner for an automotive vehicle, comprising:
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refrigerant; a compressor applying a workload to said refrigerant; a condenser connected to a refrigerant discharge side of said compressor and radiating heat of said refrigerant into ambient air; a blower leading air for air-conditioning the passenger compartment of the automotive vehicle; a heat-radiating inner heat exchanger connected to the refrigerant discharge side of said compressor and transmitting the heat of said refrigerant to the air led by said blower; an expansion valve connected to a refrigerant outlet side of said heat-radiating inner heat exchanger; an evaporator connected to a refrigerant outlet side of said expansion valve, said evaporator transmitting the heat of the air led by said blower to said refrigerant which is supplied through said expansion valve from at least one of said condenser and said heat-radiating inner heat exchanger; a switching device disposed among the refrigerant discharge side of said compressor, said switching device being set at one of a first state in that said compressor is fluidly communicated with said condenser and a second state in that said compressor is fluidly communicated with said heat-radiating inner heat exchanger; and means for lowering a cooling efficiency of said evaporator for a predetermined time when said compressor is started. - View Dependent Claims (2, 3, 4, 5)
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6. A heat pump type air conditioner for an automotive vehicle, comprising:
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refrigerant; a compressor applying a workload to said refrigerant; a condenser connected to a refrigerant discharge side of said compressor and radiating heat of said refrigerant into ambient air; a blower leading air for air-conditioning the passenger compartment of the automotive vehicle; a heat-radiating inner heat exchanger connected to the refrigerant discharge side of said compressor and transmitting the heat of said refrigerant to the air led by said blower; an expansion valve connected to a refrigerant outlet side of said heat-radiating inner heat exchanger; an evaporator connected to a refrigerant outlet side of said expansion valve, said evaporator transmitting the heat of the air led by said blower to said refrigerant which is supplied through said expansion valve from at least one of said condenser and said heat-radiating inner heat exchanger; a switching device disposed among the refrigerant discharge side of said compressor, said switching device being set at one of a first state in that said compressor is fluidly communicated with said condenser and a second state in that said compressor is fluidly communicated with said heat-radiating inner heat exchanger; air flow rate changing means changing flow rate of the air fed into said heat-radiating inner heat exchanger; thermal information detecting means detecting at least one of thermal information of said refrigerant and thermal information of the automotive vehicle inside and outside; process selecting means dividing the heating operation into plural processes which have different heating properties, respectively, said process selecting means selecting one of the process on the basis of the thermal information detected by said thermal information detecting means; and air flow rate controlling means variably controlling said air flow rate changing means on the basis of said selected process and the detected thermal information. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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13. A heat pump type air conditioner for an automotive vehicle, comprising:
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refrigerant; a compressor applying a workload to said refrigerant; a condenser connected to a refrigerant discharge side of said compressor and radiating heat of said refrigerant into ambient air; a blower leading air for air-conditioning the passenger compartment of the automotive vehicle; a heat-radiating inner heat exchanger connected to the refrigerant discharge side of said compressor and transmitting the heat of said refrigerant to the air led by said blower; an expansion valve of a variable opening degree type connected to a refrigerant outlet side of said heat-radiating inner heat exchanger; an evaporator connected to a refrigerant outlet side of said expansion valve, said evaporator transmitting the heat of the air led by said blower to said refrigerant which is supplied through said expansion valve from at least one of said condenser and said heat-radiating inner heat exchanger; a switching device disposed among the refrigerant discharge side of said compressor, a refrigerant inlet side at said condenser and a refrigerant inlet side of said heat-radiating inner heat exchanger, said switching device being set at one of a first state in that said compressor in fluidly communicated with said condenser and a second state in that said compressor is fluidly communicated with said heat-radiating inner heat exchanger; thermal information detecting means detecting at least one of thermal information of said refrigerant and thermal information of the automotive vehicle inside and outside; and expansion valve controlling means controlling an opening degree of said expansion valve on the basis of the detected thermal information such that the flow rate of said refrigerant is maintained to be larger than a predetermined value and such that the opening degree of said expansion valve is greater than zero at warm-up or start-up of a heating operation. - View Dependent Claims (14, 15, 16, 17)
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Specification