Vehicle air conditioning device
AssigneeSanden Holdings Corporation
InventorsKenichi Suzuki, Ryo Miyakoshi
Life of this patent
Estimating the term…
Abstract
There is disclosed an air conditioning device of a so-called heat pump system which efficiently and comfortably heats a vehicle interior. In a vehicle air conditioning device 1, a controller executes a heating mode in which a refrigerant discharged from a compressor 2 radiates heat in a radiator 4 and the refrigerant by which heat has been radiated is decompressed and then absorbs heat in an outdoor heat exchanger 7. The vehicle air conditioning device includes a heating medium circulating circuit 23 to heat air to be supplied from an air flow passage 3 into the vehicle interior, and the controller executes the heating by a heating medium-air heat exchanger 40 of the heating medium circulating circuit 23, when a heating capability by the radiator 4 runs short.
Claims17
A vehicle air conditioning device comprising:
- a compressor which compresses a refrigerant;
- an air flow passage through which air to be supplied into a vehicle interior flows;
- a radiator which lets the refrigerant radiate heat to heat the air to be supplied from the air flow passage into the vehicle interior;
- a heat absorber which lets the refrigerant absorb heat to cool the air to be supplied from the air flow passage into the vehicle interior;
- an outdoor heat exchanger disposed outside the vehicle interior to let the refrigerant radiate or absorb heat;
- and
- a controller,
- the controller being configured to execute at least 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,
- the vehicle air conditioning device further comprising:
- auxiliary heating means for heating the air to be supplied from the air flow passage into the vehicle interior,
- wherein the controller compares a required heating capability Qtgt, which is the heating capability required for the radiator, with a heating capability in non-frosting QhpNI to be generated by the radiator when the outdoor heat exchanger is not frosted, and complements a shortage of the heating capability in non-frosting QhpNI to the required heating capability Qtgt by the heating of the auxiliary heating means,
- wherein the heating capability in non-frosting QhpNI to be generated by the radiator when the outdoor heat exchanger is not frosted is the estimated maximum heating capability when the outdoor heat exchanger is not frosted;
- wherein the controller stops the compressor and controls the auxiliary heating means in accordance with the required heating capability Qtgt, when an actual heating capability Qhpr to be actually generated by the radiator is smaller than the heating capability in non-frosting QhpNI and a difference between the heating capability in non-frosting QhpNI and the actual heating capability Qhpr is larger than a predetermined value.
Dependencies are inferred from the claim text.