Vehicle air conditioner device

Patent metadata

Field	Value
Publication number	US-11021044-B2
Application number	US-201916295960-A
Country	US
Kind code	B2
Filing date	Mar 7, 2019
Priority date	Jun 3, 2014
Publication date	Jun 1, 2021
Grant date	Jun 1, 2021

Abstract

There is disclosed a vehicle air conditioner device of a so-called heat pump system to accurately perform efficient and comfortable heating of a vehicle interior. The vehicle air conditioner device includes a heating medium circulating circuit 23 which heats air to be supplied from an air flow passage 3 to a vehicle interior. A controller calculates a required heating capability TGQhtr of the heating medium circulating circuit to complement a shortage of an actual heating capability Qhp to a required heating capability TGQ of a radiator 4. The controller calculates a decrease amount ΔQhp of the actual heating capability Qhp from a difference ΔTXO between a refrigerant evaporation temperature TXO of an outdoor heat exchanger 7 and a refrigerant evaporation temperature TXObase in non-frosting, and adds the decrease amount ΔQhp to the required heating capability TGQhtr to execute the heating by the heating medium circulating circuit.

First claim

The invention claimed is:

1. A vehicle air conditioner 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 radiate or absorb heat; and
a controller,
the vehicle air conditioner device executing at least a heating mode in which the controller 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,
the vehicle air conditioner device comprising:
auxiliary heating device for heating the air to be supplied from the air flow passage to the vehicle interior,
wherein on the basis of a required heating capability TGQ which is a required heating capability of the radiator and an actual heating capability Qhp which is actually generated by the radiator, the controller calculates a required heating capability TGQhtr of the auxiliary heating device to complement a shortage of the actual heating capability Qhp to the required heating capability TGQ, and
the controller calculates a decrease amount ΔQhp of the actual heating capability Qhp due to frosting of the outdoor heat exchanger on the basis of a difference ΔTXO between the refrigerant evaporation temperature TXO of the outdoor heat exchanger and the refrigerant evaporation temperature TXObase of the outdoor heat exchanger in non-frosting, and
adds the decrease amount ΔQhp to the required heating capability TGQhtr of the auxiliary heating device to execute heating by the auxiliary heating device.

2. The vehicle air conditioner device according to claim 1 ,
wherein the controller calculates a frosting ratio of the outdoor heat exchanger on the basis of the difference ΔTXO, and in a case where the frosting ratio is not less than a predetermined value, the controller stops the compressor and controls the auxiliary heating device in accordance with the required heating capability TGQ.

3. The vehicle air conditioner device according to claim 1 ,
wherein the controller calculates the frosting ratio of the outdoor heat exchanger on the basis of the decrease amount ΔQhp of the actual heating capability, and in a case where the frosting ratio is not less than a predetermined value, the controller stops the compressor and controls the auxiliary heating device in accordance with the required heating capability TGQ.

4. The vehicle air conditioner device according to claim 1 ,
wherein the controller calculates a maximum heating capability Qhpmax to be generated by the radiator, calculates a decrease amount ΔQhpmax of the maximum heating capability Qhpmax due to the frosting of the outdoor heat exchanger on the basis of the difference ΔTXO, and
calculates a frosting ratio of the outdoor heat exchanger on the basis of the decrease amount ΔQhpmax of the maximum heating capability, and in a case where the frosting ratio is not less than a predetermined value, the controller stops the compressor and controls the auxiliary heating device in accordance with the required heating capability TGQ.

5. The vehicle air conditioner device according to claim 1 ,
wherein the controller calculates a maximum heating capability Qhpmax to be generated by the radiator, and calculates a decrease amount ΔQhpmax of the maximum heating capability Qhpmax due to the frosting of the outdoor heat exchanger on the basis of the difference ΔTXO, and
in a case where the decrease amount ΔQhpmax is not less than a predetermined value, the controller stops the compressor and controls the auxiliary heating device in accordance with the required heating capability TGQ.

6. The vehicle air conditioner device according to claim 1 ,
wherein the controller stops the compressor and controls the auxiliary heating device in accordance with the required heating capability TGQ in a case where the decrease amount ΔQhp of the actual heating capability is not less than a predetermined value.

7. The vehicle air conditioner device according to claim 1 ,
wherein the controller calculates a maximum heating capability Qhpmax on the basis of an air volume Ga of air passing the radiator, an outdoor air temperature Tam, and an upper limit number of revolution Ncmax of the compressor, and
calculates the actual heating capability Qhp on the basis of the air volume Ga, the outdoor air temperature Tam and an actual number of revolution Nc of the compressor.

8. The vehicle air conditioner device according to claim 1 ,
wherein the controller calculates the actual heating capability Qhp on the basis of a difference (THout−THin) between a temperature THout of air passed through the radiator and a suction air temperature THin of the radiator, specific heat Ca of the air flowing into the radiator, and the air volume Ga of the air passing the radiator.

9. The vehicle air conditioner device according to claim 1 , comprising:
a heating medium circulating circuit which has a heating medium-air heat exchanger, an electric heater, and circulating means and in which the circulating means circulates a heating medium heated by the electric heater through the heating medium-air heat exchanger,
wherein the heating medium-air heat exchanger constitutes the auxiliary heating device.

10. The vehicle air conditioner device according to claim 1 ,
wherein the auxiliary heating device is constituted of an electric heater.

11. The vehicle air conditioner device according to claim 2 ,
wherein the controller calculates a maximum heating capability Qhpmax on the basis of an air volume Ga of air passing the radiator, an outdoor air temperature Tam, and an upper limit number of revolution Ncmax of the compressor, and
calculates the actual heating capability Qhp on the basis of the air volume Ga, the outdoor air temperature Tam and an actual number of revolution Ne of the compressor.

12. The vehicle air conditioner device according to claim 6 ,
wherein the controller calculates a maximum heating capability Qhpmax on the basis of an air volume Ga of air passing the radiator, an outdoor air temperature Tam, and an upper limit number of revolution Ncmax of the compressor, and
calculates the actual heating capability Qhp on the basis of the air volume Ga, the outdoor air temperature Tam and an actual number of revolution Ne of the compressor.

13. The vehicle air conditioner device according to claim 3 ,
wherein the controller calculates the actual heating capability Qhp on the basis of a difference (THout−THin) between a temperature THout of air passed through the radiator and a suction air temperature THin of the radiator, specific heat Ca of the air flowing into the radiator, and an air volume Ga of the air passing the radiator.

14. The vehicle air conditioner device according to claim 6 ,
wherein the controller calculates the actual heating capability Qhp on the basis of a difference (THout−THin) between a temperature THout of air passed through the radiator and a suction air temperature THin of the radiator, specific heat Ca of the air flowing into the radiator, and an air volume Ga of the air passing the radiator.

Assignees

• Sanden Holdings Corp

Inventors

• Suzuki Kenichi
• Miyakoshi Ryo
• Yamashita Kouhei
• Shigeta Megumi

Classifications

• B60H2001/3263

  of the refrigerant at an evaporating unit · CPC title

• B60H2001/3272

  to control the revolving speed of a compressor · CPC title

• B60H2001/00949

  comprising additional heating/cooling sources, e.g. second evaporator · CPC title

• B60H2001/3258

  of the air at a condensing unit · CPC title

• B60H1/00921

  where the flow direction of the refrigerant does not change and there is an extra subcondenser, e.g. in an air duct · CPC title