Air conditioner for vehicle
First Claim
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1. An air conditioner for a hybrid vehicle with an engine mounted to the hybrid vehicle, the air conditioner comprising:
- a first heater disposed in a thermal fluid circulation circuit in which a thermal fluid heated by exhaust heat of the engine circulates, and configured to heat air to be blown into a vehicle compartment by using the thermal fluid as a heat source;
a second heater disposed downstream of the first heater in a flow direction of the air to be blown into the vehicle compartment, and adapted as an auxiliary heater to further heat the air heated by the first heater;
a first heating capacity control portion controlling a heating capacity of the first heater; and
a second heating capacity control portion controlling a heating capacity of the second heater, whereinthe first heating capacity control portion controls the heating capacity of the first heater such that a temperature of the engine approaches a predetermined temperature regardless of an operation state of the engine when the thermal fluid after passing through the first heater returns to the engine,the second heating capacity control portion controls the heating capacity of the second heater such that temperature of the air to be blown into the vehicle compartment becomes a desired temperature,the thermal fluid circulation circuit is provided with a radiator radiating heat of the thermal fluid, and a thermostat valve operated at an operating temperature to cause the thermal fluid to pass through the radiator or to bypass the radiator,the predetermined temperature is lower than the operating temperature of the thermostat valve,the first heater is disposed in the thermal fluid circulation circuit to heat air by performing heat exchange between the thermal fluid and air, andthe second heater is a refrigerant condenser of a refrigerant cycle in which refrigerant discharged from a compressor flows into the second heater to heat the air passing through the second heater.
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Accused Products
Abstract
In an air conditioner for a vehicle with an equipment controlled in accordance with a traveling state of the vehicle, a first heater is disposed to heat air to be blown into a vehicle compartment by using a coolant of the equipment as a heat source, and a second heater is adapted as an auxiliary heater to further heat the air heated by the first heater. A heating capacity of the first heater is controlled such that a temperature of the equipment is approached to a predetermined temperature when the thermal fluid after passing through the first heater returns the equipment, and a heating capacity of the second heater is controlled such that a temperature of air to be blown into the vehicle compartment becomes a desired temperature.
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Citations
25 Claims
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1. An air conditioner for a hybrid vehicle with an engine mounted to the hybrid vehicle, the air conditioner comprising:
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a first heater disposed in a thermal fluid circulation circuit in which a thermal fluid heated by exhaust heat of the engine circulates, and configured to heat air to be blown into a vehicle compartment by using the thermal fluid as a heat source; a second heater disposed downstream of the first heater in a flow direction of the air to be blown into the vehicle compartment, and adapted as an auxiliary heater to further heat the air heated by the first heater; a first heating capacity control portion controlling a heating capacity of the first heater; and a second heating capacity control portion controlling a heating capacity of the second heater, wherein the first heating capacity control portion controls the heating capacity of the first heater such that a temperature of the engine approaches a predetermined temperature regardless of an operation state of the engine when the thermal fluid after passing through the first heater returns to the engine, the second heating capacity control portion controls the heating capacity of the second heater such that temperature of the air to be blown into the vehicle compartment becomes a desired temperature, the thermal fluid circulation circuit is provided with a radiator radiating heat of the thermal fluid, and a thermostat valve operated at an operating temperature to cause the thermal fluid to pass through the radiator or to bypass the radiator, the predetermined temperature is lower than the operating temperature of the thermostat valve, the first heater is disposed in the thermal fluid circulation circuit to heat air by performing heat exchange between the thermal fluid and air, and the second heater is a refrigerant condenser of a refrigerant cycle in which refrigerant discharged from a compressor flows into the second heater to heat the air passing through the second heater. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. An air conditioner for a hybrid vehicle with an engine mounted to the hybrid vehicle, the air conditioner comprising:
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a first heater disposed in a thermal fluid circulation circuit in which a thermal fluid heated by exhaust heat of the engine circulates, and configured to heat air to be blown into a vehicle compartment by using the thermal fluid as a heat source; a second heater disposed downstream of the first heater in a flow direction of the air to be blown into the vehicle compartment, and adapted as an auxiliary heater to further heat the air heated by the first heater; a first heating capacity control portion controlling a heating capacity of the first heater; and a second heating capacity control portion controlling a heating capacity of the second heater, wherein the first heating capacity control portion controls the heating capacity of the first heater such that a temperature of the engine becomes equal to or higher than a predetermined temperature regardless of an operation state of the engine when the thermal fluid after passing through the first heater returns to the engine, the second heating capacity control portion controls the heating capacity of the second heater such that temperature of the air to be blown into the vehicle compartment becomes a desired temperature, the thermal fluid circulation circuit is provided with a radiator radiating heat of the thermal fluid, and a thermostat valve operated at an operating temperature to cause the thermal fluid to pass through the radiator or to bypass the radiator, the predetermined temperature is lower than the operating temperature of the thermostat valve, the first heater is disposed in the thermal fluid circulation circuit to heat air by performing heat exchange between the thermal fluid and air, and the second heater is a refrigerant condenser of a refrigerant cycle in which refrigerant discharged from a compressor flows into the second heater to heat the air passing through the second heater. - View Dependent Claims (21, 22, 23, 24, 25)
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Specification
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Current AssigneeDENSO Corporation
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Original AssigneeDENSO Corporation
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InventorsNishikawa, Michio, Kakehashi, Nobuharu
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Primary Examiner(s)McAllister, Steven B
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Assistant Examiner(s)MILLER, SAMANTHA A
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Application NumberUS12/807,312Publication NumberTime in Patent Office2,288 DaysField of Search454/74US Class Current1/1CPC Class CodesB60H 1/00885 Controlling the flow of hea...B60H 1/00921 where the flow direction of...B60H 1/3213 for increasing the efficien...
