초록 ▼

A vehicle air conditioning apparatus includes a heater core 21 radiating heat of engine coolant to an air stream to be blown off to a vehicle compartment, a sub condenser 4 operative to radiate heat of compressed refrigerant to the air stream to be blown off to the vehicle compartment for condensing

A vehicle air conditioning apparatus includes a heater core 21 radiating heat of engine coolant to an air stream to be blown off to a vehicle compartment, a sub condenser 4 operative to radiate heat of compressed refrigerant to the air stream to be blown off to the vehicle compartment for condensing refrigerant, an evaporator 7 operative to allow expanded refrigerant by an expansion valve 6 to absorb heat of the air stream in the vehicle compartment to be evaporated, a variable displacement compressor 2 operative to compress evaporated refrigerant to be discharged to the condenser 4 , a sensor 9 that detects a discharge refrigerant pressure of the compressor 2 , and a compressor control means 100 operative to control a discharge refrigerant volume of the compressor 2 so as to compel a blow-off temperature to lie at a given temperature in response to a detected result of the sensor 9.

대표청구항 ▼

1. A vehicle air conditioning apparatus comprising:a heat-radiating inside-vehicle-compartment heat exchanger adapted to radiate heat of compressed gas-phase refrigerant into an air stream to be blown off to a vehicle compartment for condensing refrigerant;expansion means for expanding the refrigera

1. A vehicle air conditioning apparatus comprising:a heat-radiating inside-vehicle-compartment heat exchanger adapted to radiate heat of compressed gas-phase refrigerant into an air stream to be blown off to a vehicle compartment for condensing refrigerant;expansion means for expanding the refrigerant condensed in the heat-radiating inside-vehicle-compartment heat exchanger;a heat-absorbing inside-vehicle-compartment heat exchanger adapted to compel heat of the air stream inside the vehicle compartment to be absorbed by the refrigerant expanded by the expansion means;a variable displacement compressor adapted to be driven by an engine to compress the refrigerant evaporated in the heat-absorbing inside-vehicle-compartment heat exchanger;blow-off temperature detection means for detecting at least one of a blow-off temperature or a numeric value correlated with the blow-off temperature;compressor control means operative to control a discharge refrigerant volume of the variable displacement compressor such that the blow-off temperature lies at a given temperature responsive to a detection result of the blow-off temperature detection means; andheating means for heating the heat-radiating inside-vehicle-compartment heat exchanger. 2. The vehicle air conditioning apparatus according to claim 1, wherein the heating means includes a heat radiator that radiates heat of vehicle-compartment drive-system coolant to an air stream in a inside-vehicle-compartment air flow passage. 3. A vehicle air conditioning apparatus comprising:a heat-radiating inside-vehicle-compartment heat exchanger adapted to radiate heat of compressed gas-phase refrigerant into an air stream to be blown off to a vehicle compartment for condensing refrigerant;expansion means for expanding the refrigerant condensed in the heat-radiating inside-vehicle-compartment heat exchanger:a heat-absorbing inside-vehicle-compartment heat exchanger adapted to compel heat of the air stream inside the vehicle compartment to be absorbed by the refrigerant expanded by the expansion means;a variable displacement compressor adapted to be driven by an engine to compress the refrigerant evaporated in the heat-absorbing inside-vehicle-compartment heat exchanger;blow-off temperature detection means for detecting at least one of a blow-off temperature or a numeric value correlated with the blow-off temperature; andcompressor control means operative to control a discharge refrigerant volume of the variable displacement compressor such that the blow-off temperature lies at a given temperature responsive to a detection result of the blow-off temperature detection means;wherein the blow-off temperature detection means includes a sensor that detects a discharge refrigerant temperature of the variable displacement compressor. 4. The A vehicle air conditioning apparatus comprising:a heat-radiating inside-vehicle-compartment heat exchanger adapted to radiate heat of compressed gas-phase refrigerant into an air stream to be blown off to a vehicle compartment for condensing refrigerant;expansion means for expanding the refrigerant condensed in the heat-radiating inside-vehicle-compartment heat exchanger;a heat-absorbing inside-vehicle-compartment heat exchanger adapted to compel heat of the air stream inside the vehicle compartment to be absorbed by the refrigerant expanded by the expansion means;a variable displacement compressor adapted to be driven by an engine to compress the refrigerant evaporated in the heat-absorbing inside-vehicle-compartment heat exchanger;blow-off temperature detection means for detecting at least one of a blow-off temperature or a numeric value correlated with the blow-off temperature; andcompressor control means operative to control a discharge refrigerant volume of the variable displacement compressor such that the blow-off temperature lies at a given temperature responsive to a detection result of the blow-off temperature detection means;wherein the given temperature incl udes a target blow-off temperature to be assigned as a setting temperature of a vehicle compartment. 5. A vehicle air conditioning apparatus comprising:a heat-radiating inside-vehicle-compartment heat exchanger adapted to radiate heat of compressed gas-phase refrigerant into an air stream to be blown off to a vehicle compartment for condensing refrigerant;expansion means for expanding the refrigerant condensed in the heat-radiating inside-vehicle-compartment heat exchanger;a heat-absorbing inside-vehicle-compartment heat exchanger adapted to compel heat of the air stream inside the vehicle compartment to be absorbed by the refrigerant expanded by the expansion means;a variable displacement compressor adapted to be driven by an engine to compress the refrigerant evaporated in the heat-absorbing inside-vehicle-compartment heat exchanger;blow-off temperature detection means for detecting at least one of a blow-off temperature or a numeric value correlated with the blow-off temperature; andcompressor control means operative to control a discharge refrigerant volume of the variable displacement compressor such that the blow-off temperature lies at a given temperature responsive to a detection result of the blow-off temperature detection means;wherein the expansion means includes an expansion valve having a valve-opening characteristic that, in a practical operating area of the variable displacement compressor in a graph where an ordinates axis represents a refrigerant pressure of the heat-absorbing inside-vehicle-compartment heat exchanger and an abscissa axis represents a discharge refrigerant pressure of the variable displacement compressor, does not intersect a control valve characteristic of the variable displacement compressor and has a slope which is inclined downward in proportion to the discharge refrigerant pressure. 6. The vehicle air conditioning apparatus according to claim 5, wherein the blow-off temperature detection means includes a sensor that detects a discharge refrigerant pressure of the variable displacement compressor. 7. The vehicle air conditioning apparatus according to claim 5, wherein the blow-off temperature detection means includes a sensor that detects a temperature of an air stream at an outlet of the heat-radiating inside-vehicle-compartment heat exchanger. 8. A vehicle air conditioning apparatus comprising:a heat-radiating inside-vehicle-compartment heat exchanger adapted to radiate heat of compressed gas-phase refrigerant into an air stream to be blown off to a vehicle compartment for condensing refrigerant;expansion means for expanding the refrigerant condensed in the heat-radiating inside-vehicle-compartment heat exchanger;a heat-absorbing inside-vehicle-compartment heat exchanger adapted to compel heat of the air stream inside the vehicle compartment to be absorbed by the refrigerant expanded by the expansion means;a variable displacement compressor adapted to be driven by an engine to compress the refrigerant evaporated in the heat-absorbing inside-vehicle-compartment heat exchanger;blow-off temperature detection means for detecting at least one of a blow-off temperature or a numeric value correlated with the blow-off temperature;compressor control means operative to control a discharge refrigerant volume of the variable displacement compressor such that the blow-off temperature lies at a given temperature responsive to a detection result of the blow-off temperature detection means; andintake refrigerant pressure detection means for detecting an intake refrigerant pressure of the variable displacement compressor or a numeric value correlated with the intake refrigerant pressure,wherein the compressor control means controls a discharge refrigerant volume of the variable displacement compressor such that, in response to a detection result of the intake refrigerant pressure detection means in addition to the detection result of the blow-off temperature detection means, the blow-off temperature beco mes closer to a given temperature while maintaining a compression ratio of the variable displacement compressor at a value below a given value. 9. The vehicle air conditioning apparatus according to claim 8, wherein the intake refrigerant pressure detection means includes a sensor that detects a temperature of an air stream at an outlet of the heat-absorbing inside-vehicle-compartment heat exchanger. 10. A vehicle air conditioning apparatus comprising:a heat-radiating inside-vehicle-compartment heat exchanger adapted to radiate heat of compressed gas-phase refrigerant into an air stream to be blown off to a vehicle compartment for condensing refrigerant;expansion means for expanding the refrigerant condensed in the heat-radiating inside-vehicle-compartment heat exchanger:a heat-absorbing inside-vehicle-compartment heat exchanger adapted to compel beat of the air stream inside the vehicle compartment to be absorbed by the refrigerant expanded by the expansion means:a variable displacement compressor adapted to be driven by an engine to compress the refrigerant evaporated in the heat-absorbing inside-vehicle-compartment heat exchanger;blow-off temperature detection means for detecting at least one of a blow-off temperature or a numeric value correlated with the blow-off temperature;compressor control means operative to control a discharge refrigerant volume of the variable displacement compressor such that the blow-off temperature lies at a given temperature responsive to a detection result of the blow-off temperature detection means;inner and outer and air regulating means for regulating a ratio between an inner air stream and an outer air stream to be introduced into an inside-vehicle-compartment air flow passage;an outlet temperature detection means for detecting an air temperature at an outlet of the heat-absorbing inside-vehicle-compartment heat exchanger or a numeric value correlated with the air temperature; andinner and outer air control means responsive to a detection result of the outlet temperature detection means to control the inner and outer air regulating means such that an air temperature at an outlet of the heat-absorbing inside-vehicle-compartment heat exchanger lies at a given value. 11. The vehicle air conditioning apparatus according to claim 10, wherein the outlet temperature detection means includes a sensor that detects a moisture of the inside-vehicle-compartment air flow passage. 12. The vehicle air conditioning apparatus according to claim 10, wherein the outlet temperature detection means includes a sensor that detects an intake refrigerant pressure of the variable displacement compressor. 13. The vehicle air conditioning apparatus according to claim 1, further comprising:inner and outer air regulating means that regulates a ratio between inner and outer air streams to be introduced into an inside-vehicle-compartment air flow passage;heating temperature detection means that detects a heating temperature of the heating means or a numeric value correlated with the heating temperature;inlet temperature detection means that detects an air temperature at an inlet of the heat-absorbing inside-vehicle-compartment heat exchanger or a numeric value correlated with the air temperature; andinner and outer air control means operative to calculate a target air temperature at an inlet of the heat-absorbing inside-vehicle-compartment heat exchanger for causing an air temperature at an outlet of the heat-absorbing inside-vehicle-compartment heat exchanger to lie at a given temperature in response to a detection result of the heating temperature detection means while controlling the inner and outer air regulating means for causing an air temperature at an inlet of the heat-absorbing inside-vehicle-compartment heat exchanger to lie at the target air temperature in response to a detection result of the inlet air temperature detection means. 14. A vehicle air conditioning apparatus comprising:a subcondenser adapted to ra diate heat of compressed gas-phase refrigerant into an air stream to be blown off to a vehicle compartment, by condensing refrigerant;an expander configured to expand the refrigerant condensed by the subcondenser;an evaporator adapted to compel heat of the air stream inside the vehicle compartment to be absorbed by the refrigerant expanded by the expander;a variable displacement compressor adapted to be driven by an engine to compress the refrigerant evaporated by the evaporator;a blow-off temperature detector configured to detect at least one of a blow-off temperature or a numeric value correlated with the blow-off temperature;a controller configured to control a discharge refrigerant volume of the variable displacement compressor such that the blow-off temperature lies at a given temperature responsive to a detection result of the blow-off temperature detector; anda heater positioned upstream of the subcondenser in the direction of air flow, configured to provide heat to the subcondenser.