VEHICLE AIR CONDITIONER
First Claim
1. A vehicle air conditioner comprising:
- a compressor which compresses a refrigerant;
an air flow passage through which air to be supplied into a vehicle interior flows;
a radiator disposed in the air flow passage to let the refrigerant radiate heat;
a heat absorber disposed in the air flow passage to let the refrigerant absorb heat;
an outdoor heat exchanger disposed outside the vehicle interior to let the refrigerant radiate or absorb heat;
an expansion valve which decompresses the refrigerant flowing into the outdoor heat exchanger; and
control means,the control means being configured to change and execute one of;
a heating mode in which the refrigerant discharged from the compressor radiates heat in the radiator, and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in the outdoor heat exchanger;
a dehumidifying and heating mode in which the refrigerant discharged from the compressor radiates heat in the radiator, and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in the heat absorber and the outdoor heat exchanger;
an internal cycle mode in which inflow of the refrigerant into the outdoor heat exchanger and outflow of the refrigerant from the outdoor heat exchanger are inhibited, the refrigerant discharged from the compressor radiates heat in the radiator, and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in the heat absorber;
a dehumidifying and cooling mode in which the refrigerant discharged from the compressor radiates heat in the radiator and the outdoor heat exchanger, and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in the heat absorber; and
a cooling mode in which the refrigerant discharged from the compressor radiates heat in the outdoor heat exchanger, and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in the heat absorber,wherein in the internal cycle mode, the control means executes a refrigerant sealing mode to seal the refrigerant in the outdoor heat exchanger in a case where an amount of the refrigerant to be circulated is excessively large, and executes a refrigerant discharge mode to discharge the refrigerant from the outdoor heat exchanger in a case where the amount of the refrigerant to be circulated is insufficient.
2 Assignments
0 Petitions
Accused Products
Abstract
There is disclosed a vehicle air conditioner which can effectively eliminate occurrence of excess or lack of an amount of a refrigerant to be circulated in an internal cycle mode. A controller changes and executes a heating mode, a dehumidifying and heating mode, an internal cycle mode, a dehumidifying and cooling mode, and a cooling mode. When an amount of the refrigerant to be circulated is excessively large in the internal cycle mode, a controller executes a refrigerant sealing mode to seal a refrigerant in an outdoor heat exchanger 7, and when the amount of the refrigerant to be circulated is insufficient, the controller executes a refrigerant discharge mode to discharge the refrigerant from the outdoor heat exchanger 7.
39 Citations
6 Claims
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1. A vehicle air conditioner comprising:
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a compressor which compresses a refrigerant; an air flow passage through which air to be supplied into a vehicle interior flows; a radiator disposed in the air flow passage to let the refrigerant radiate heat; a heat absorber disposed in the air flow passage to let the refrigerant absorb heat; an outdoor heat exchanger disposed outside the vehicle interior to let the refrigerant radiate or absorb heat; an expansion valve which decompresses the refrigerant flowing into the outdoor heat exchanger; and control means, the control means being configured to change and execute one of; a heating mode in which the refrigerant discharged from the compressor radiates heat in the radiator, and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in the outdoor heat exchanger; a dehumidifying and heating mode in which the refrigerant discharged from the compressor radiates heat in the radiator, and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in the heat absorber and the outdoor heat exchanger; an internal cycle mode in which inflow of the refrigerant into the outdoor heat exchanger and outflow of the refrigerant from the outdoor heat exchanger are inhibited, the refrigerant discharged from the compressor radiates heat in the radiator, and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in the heat absorber; a dehumidifying and cooling mode in which the refrigerant discharged from the compressor radiates heat in the radiator and the outdoor heat exchanger, and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in the heat absorber; and a cooling mode in which the refrigerant discharged from the compressor radiates heat in the outdoor heat exchanger, and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in the heat absorber, wherein in the internal cycle mode, the control means executes a refrigerant sealing mode to seal the refrigerant in the outdoor heat exchanger in a case where an amount of the refrigerant to be circulated is excessively large, and executes a refrigerant discharge mode to discharge the refrigerant from the outdoor heat exchanger in a case where the amount of the refrigerant to be circulated is insufficient. - View Dependent Claims (2)
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3. A vehicle air conditioner comprising:
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a compressor which compresses a refrigerant; an air flow passage through which air to be supplied into a vehicle interior flows; a radiator disposed in the air flow passage to let the refrigerant radiate heat; a heat absorber disposed in the air flow passage to let the refrigerant absorb heat; an outdoor heat exchanger disposed outside the vehicle interior to let the refrigerant radiate or absorb heat; an expansion valve which decompresses the refrigerant flowing into the outdoor heat exchanger; and control means, the control means being configured to change and execute one of; a heating mode in which the refrigerant discharged from the compressor radiates heat in the radiator, and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in the outdoor heat exchanger; a dehumidifying and heating mode in which the refrigerant discharged from the compressor radiates heat in the radiator, and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in the heat absorber and the outdoor heat exchanger; an internal cycle mode in which inflow of the refrigerant into the outdoor heat exchanger and outflow of the refrigerant from the outdoor heat exchanger are inhibited, the refrigerant discharged from the compressor radiates heat in the radiator, and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in the heat absorber; a dehumidifying and cooling mode in which the refrigerant discharged from the compressor radiates heat in the radiator and the outdoor heat exchanger, and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in the heat absorber; and a cooling mode in which the refrigerant discharged from the compressor radiates heat in the outdoor heat exchanger, and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in the heat absorber, wherein in the internal cycle mode, the control means closes the expansion valve which decompresses the refrigerant flowing into the outdoor heat exchanger, to inhibit the inflow into the outdoor heat exchanger, and discharges the refrigerant from the outdoor heat exchanger every predetermined timing. - View Dependent Claims (4)
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5. A vehicle air conditioner comprising:
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a compressor which compresses a refrigerant; an air flow passage through which air to be supplied into a vehicle interior flows; a radiator disposed in the air flow passage to let the refrigerant radiate heat; a heat absorber disposed in the air flow passage to let the refrigerant absorb heat; an outdoor heat exchanger disposed outside the vehicle interior to let the refrigerant radiate or absorb heat; an expansion valve which decompresses the refrigerant flowing into the outdoor heat exchanger; and control means, the control means being configured to change and execute one of; a heating mode in which the refrigerant discharged from the compressor radiates heat in the radiator, and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in the outdoor heat exchanger; a dehumidifying and heating mode in which the refrigerant discharged from the compressor radiates heat in the radiator, and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in the heat absorber and the outdoor heat exchanger; an internal cycle mode in which inflow of the refrigerant into the outdoor heat exchanger and outflow of the refrigerant from the outdoor heat exchanger are inhibited, the refrigerant discharged from the compressor radiates heat in the radiator, and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in the heat absorber; a dehumidifying and cooling mode in which the refrigerant discharged from the compressor radiates heat in the radiator and the outdoor heat exchanger, and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in the heat absorber; and a cooling mode in which the refrigerant discharged from the compressor radiates heat in the outdoor heat exchanger, and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in the heat absorber, wherein when the control means shifts to the internal cycle mode, the control means delays a timing to inhibit the outflow of the refrigerant from the outdoor heat exchanger.
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6. A vehicle air conditioner comprising:
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a compressor which compresses a refrigerant; an air flow passage through which air to be supplied into a vehicle interior flows; a radiator disposed in the air flow passage to let the refrigerant radiate heat; a heat absorber disposed in the air flow passage to let the refrigerant absorb heat; an outdoor heat exchanger disposed outside the vehicle interior to let the refrigerant radiate or absorb heat; an expansion valve which decompresses the refrigerant flowing into the outdoor heat exchanger; and control means, the control means being configured to change and execute one of; a heating mode in which the refrigerant discharged from the compressor radiates heat in the radiator, and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in the outdoor heat exchanger; a dehumidifying and heating mode in which the refrigerant discharged from the compressor radiates heat in the radiator, and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in the heat absorber and the outdoor heat exchanger; an internal cycle mode in which inflow of the refrigerant into the outdoor heat exchanger and outflow of the refrigerant from the outdoor heat exchanger are inhibited, the refrigerant discharged from the compressor radiates heat in the radiator, and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in the heat absorber; a dehumidifying and cooling mode in which the refrigerant discharged from the compressor radiates heat in the radiator and the outdoor heat exchanger, and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in the heat absorber; and a cooling mode in which the refrigerant discharged from the compressor radiates heat in the outdoor heat exchanger, and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in the heat absorber, wherein when the control means shifts to the internal cycle mode, the control means delays a timing to inhibit the inflow of the refrigerant into the outdoor heat exchanger.
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Specification