US 2015/0306939 A1Published application

Vehicle air conditioner

AssigneeSanden Holdings Corporation

InventorsRyo MIYAKOSHI, Kenichi SUZUKI, Hidenori TAKEI, Kouhei YAMASHITA

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Abstract

There is disclosed a vehicle air conditioner which can enlarge an effective range of a dehumidifying and cooling mode to realize comfortable air condition in a vehicle interior. A controller changes and executes at least one of a heating mode, a dehumidifying and heating mode, a dehumidifying and cooling mode, and a cooling mode. In at least the dehumidifying and cooling mode, the controller controls a capability of a compressor 2 on the basis of a temperature of a heat absorber 9, and controls a valve position of an outdoor expansion valve 6 on the basis of a temperature or a pressure of the radiator 4, and executes a radiator temperature prior mode to enlarge the capability of the compressor 2, in a case where heat radiation in the radiator 4 runs short.

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 at least 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 only in the heat absorber or in the heat absorber and the outdoor heat exchanger;
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 at least the dehumidifying and cooling mode, the control means controls a capability of the compressor on the basis of a temperature of the heat absorber, and controls a valve position of the expansion valve on the basis of a temperature or a pressure of the radiator, and
executes a radiator temperature prior mode to enlarge the capability of the compressor, in a case where heat radiation in the radiator runs short.

13 more elements

Facts

Application

14/441,303Filed 11 Nov 2013

Priority

JP 2012-2475059 Nov 2012

Published

29 Oct 2015

Term ends

Not estimatedThe source records don’t support an estimate.

Classification4 codes

B60H 1/3213
Control means therefor: for increasing the efficiency in a vehicle heat pump
B60H 1/00921
Controlling the flow of liquid in a heat pump system: where the flow direction of the refrigerant does not change and there is an extra…
B60H 2001/00961
The components being temperature regulating devices: comprising means for defrosting outside heat exchangers
B60H
Arrangements of heating, cooling, ventilating or other air-treating devices specially adapted for

Abstract

Claims20