US 10,538,144 B2Granted

Vehicle air conditioning device

AssigneeSanden Holdings Corporation

InventorsKenichi Suzuki, Ryo Miyakoshi, Kouhei Yamashita

Life of this patent

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Abstract

There is disclosed a vehicle air conditioning device of a heat pump system which delays proceeding of frosting onto an outdoor heat exchanger, thereby eliminating or inhibiting deterioration of a heating capability due to the frosting. The vehicle air conditioning device executes a heating mode in which a controller lets a refrigerant discharged from a compressor 2 radiate heat in a radiator 4, decompresses the refrigerant by which heat has been radiated, and then lets the refrigerant absorb heat in an outdoor heat exchanger 7, and on the basis of a difference ΔTXO=(TXObase−TXO) between a refrigerant evaporation temperature TXObase of the outdoor heat exchanger 7 in non-frosting and a refrigerant evaporation temperature TXO of the outdoor heat exchanger 7, the controller corrects a target subcool degree TGSC that is a target value of a subcool degree of the refrigerant in the radiator 4 in an increasing direction in accordance with increase of the difference ΔTXO.

Claims1

Dependent claims

A vehicle air conditioning device comprising:

a compressor which compresses a refrigerant;
an air flow passage through which air to be supplied to a vehicle interior flows;
a radiator which lets the refrigerant radiate heat to heat the air to be supplied from the air flow passage to the vehicle interior;
a heat absorber which lets the refrigerant absorb heat to cool the air to be supplied from the air flow passage to the vehicle interior;
an outdoor heat exchanger disposed outside the vehicle interior to let the refrigerant absorb heat;
and
control means,
the vehicle air conditioning device executing at least a heating mode in which the control means lets the refrigerant discharged from the compressor radiate heat in the radiator, decompresses the refrigerant by which heat has been radiated, and then lets the refrigerant absorb heat in the outdoor heat exchanger,
wherein the control means corrects a target subcool degree TGSC that is a target value of a subcool degree of the refrigerant in the radiator in an increasing direction at an early stage of start.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/378,077Filed 8 Apr 2019 · division
Priority: JP 2014-0966868 May 2014
Published: US 2019/0255911 A122 Aug 2019
Granted: 21 Jan 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification27 codes

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 1/00385
Air-conditioning arrangements specially adapted for particular vehicles: for vehicles having an electrical drive, e.g. hybrid or fuel cell
B60H 1/0075
Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g.…
B60H 1/00764
Control systems or circuits characterised by their input, i.e. by the detection, measurement or calculation of particular conditions, e.g.…

Family

PCT/JP2015/057722Parent of this division · filed 16 Mar 2015
US 2019/0255911 A1Pre-grant publication · published 22 Aug 2019
Application15/309,374Parent of this division
US 10,427,495 B2Parent of this division
US 2017/0080778 A1Published application
US 10,538,144 B2This patent

From the US filing history. Foreign family members aren’t listed.