Air-conditioning system for motor vehicle

Patent metadata

Field	Value
Publication number	US-12589633-B2
Application number	US-202318101113-A
Country	US
Kind code	B2
Filing date	Jan 24, 2023
Priority date	Jan 25, 2022
Publication date	Mar 31, 2026
Grant date	Mar 31, 2026

Abstract

An air-conditioning system for a motor vehicle is disclosed. The air-conditioning system includes a refrigerant circuit for being flowed through by a refrigerant. In the refrigerant circuit, a compressor for compressing the refrigerant, a condenser for condensing the refrigerant subject to passing condensation heat on to a fluid conducted through the condenser, an expansion device for expanding the refrigerant and an evaporator for evaporating the refrigerant are arranged. A coolant circuit is provided fluidically separated from the refrigerant circuit for being flowed through by a coolant. In the coolant circuit at least one heat source for heating the coolant is arranged. The coolant circuit is thermally connected to the refrigerant circuit via the evaporator of the refrigerant circuit, so that in the evaporator heat from the coolant is transferrable to the refrigerant.

First claim

The invention claimed is:

1 . An air-conditioning system for a motor vehicle, comprising:
a refrigerant circuit for being flowed through by a refrigerant, wherein in the refrigerant circuit a compressor for compressing the refrigerant, a condenser for condensing the refrigerant subject to passing condensation heat on to a fluid conducted through the condenser, an expansion device for expanding the refrigerant and an evaporator for evaporating the refrigerant are arranged, a coolant circuit provided fluidically separated from the refrigerant circuit for being flowed through by a coolant, a first heat source and a second heat source fluidically connected in series arranged in the coolant circuit for heating the coolant, wherein the coolant circuit includes a bypass where the coolant can be conducted past the second heat source, wherein the bypass comprises a fluidic parallel connection, and wherein the fluidic parallel connection is arranged in series with the first heat source, so that the coolant cannot be conducted past the first heat source, and wherein the coolant circuit is thermally connected to the refrigerant circuit via the evaporator of the refrigerant circuit, so that in the evaporator heat from the coolant is transferrable to the refrigerant.

2 . The air-conditioning system according to claim 1 , wherein the first heat source includes an electric heating device.

3 . The air-conditioning system according to claim 2 , wherein the second heat source includes an electric energy store where the waste heat of the electric energy store generated during operation is transferrable to the coolant.

4 . The air-conditioning system according to claim 1 , wherein the first heat source includes an electric drive train where the waste heat of the electric drive train generated during operation is transferrable to the coolant.

5 . The air-conditioning system according to claim 1 , wherein the fluidic parallel connection includes a first fluid branch and a second fluid branch arranged in parallel, wherein in the first fluid branch the second heat source is arranged, and the second fluid branch forms the bypass line.

6 . The air-conditioning system according to claim 1 , wherein the coolant circuit comprises an adjustable valve device structured and arranged to adjust a portion of coolant that is conducted through the bypass line past the second heat source.

7 . The air-conditioning system according to claim 6 , wherein the adjustable valve device is a three-way valve that includes: a first connection that communicates fluidically with the evaporator, a second connection that communicates fluidically with a first fluid branch of the fluidic parallel connection, and a third connection that communicates fluidically with a second fluid branch of the fluidic parallel connection.

8 . The air-conditioning system according to claim 1 , wherein the condenser is a two-stream heat exchanger that can be flowed through both by the refrigerant and also, fluidically separated from the refrigerant, by a fluid or gas to be heated.

9 . The air-conditioning system according to claim 1 , wherein in the refrigerant circuit a collection reservoir for buffer-storing refrigerant is arranged.

10 . A motor vehicle, comprising:
a vehicle interior, an air-conditioning system for air-conditioning the vehicle interior, the air-conditioning system including: a refrigerant circuit for being flowed through by a refrigerant, wherein in the refrigerant circuit a compressor for compressing the refrigerant, a condenser for condensing the refrigerant subject to passing condensation heat on to a fluid conducted through the condenser, an expansion device for expanding the refrigerant and an evaporator for evaporating the refrigerant are arranged, a coolant circuit provided fluidically separated from the refrigerant circuit for being flowed through by a coolant, a first heat source and a second heat source fluidically connected in series arranged in the coolant circuit for heating the coolant, wherein the coolant circuit includes a bypass where the coolant can be conducted past the second heat source, wherein the bypass comprises a fluidic parallel connection, and wherein the fluidic parallel connection is arranged in series with the first heat source, so that the coolant cannot be conducted past the first heat source, and wherein the coolant circuit is thermally connected to the refrigerant circuit via the evaporator of the refrigerant circuit, so that in the evaporator heat from the coolant is transferrable to the refrigerant.

11 . The motor vehicle according to claim 10 , further comprising an electric drive train and a vehicle coolant circuit for cooling the electric drive train, wherein in the vehicle coolant circuit a coolant radiator for transferring heat from the coolant to a gas conducted through the coolant radiator is arranged.

12 . The motor vehicle according to claim 11 , wherein the first heat source includes the electric drive train where waste heat of the electric drive train generated during operation is transferrable to the coolant.

13 . The motor vehicle according to claim 10 , wherein the first heat source includes an electric heating device.

14 . The motor vehicle according to claim 13 , wherein the second heat source includes an electric battery where the waste heat of the electric battery generated during operation is transferrable to the coolant.

15 . The motor vehicle according to claim 10 , wherein the fluidic parallel connection includes a first fluid branch and a second fluid branch arranged in parallel, wherein in the first fluid branch the second heat source is arranged, and the second fluid branch forms the bypass line.

16 . The motor vehicle according to claim 15 , wherein the coolant circuit comprises an adjustable valve device structured and arranged to adjust a portion of coolant that is conducted through the bypass line past the second heat source.

17 . The motor vehicle according to claim 16 , wherein the adjustable valve device is a three-way valve that includes: a first connection that communicates fluidically with the evaporator, a second connection that communicates fluidically with the first fluid branch, and a third connection that communicates fluidically with the second fluid branch.

18 . The motor vehicle according to claim 16 , wherein the coolant circuit comprises a delivery device arranged between the adjustable valve device and the evaporator.

19 . The motor vehicle according to claim 10 , wherein the condenser is a two-stream heat exchanger that can be flowed through by the refrigerant and a fluid or gas to be heated fluidically separated from the refrigerant.

20 . The motor vehicle according to claim 10 , wherein in the refrigerant circuit a collection reservoir for buffer-storing the refrigerant is arranged.

Assignees

• Mahle Int Gmbh

Inventors

• Boger Markus
• Jung Matthias

Classifications

• B60H1/00278 Primary

  for the battery · CPC title

• B60H1/143

  the heat being derived from cooling an electric component, e.g. electric motors, electric circuits, fuel cells or batteries · CPC title

• B60H2001/00307

  Component temperature regulation using a liquid flow · CPC title

• B60H1/3228 Primary

  characterised by refrigerant circuit configurations · CPC title

• B60H1/3227

  characterised by the arrangement or the type of heat exchanger, e.g. condenser, evaporator (condensed liquid drainage means B60H1/3233) · CPC title