Air-conditioning system of a motor vehicle and method for operating the air-conditioning system

Patent metadata

Field	Value
Publication number	US-10953727-B2
Application number	US-201816107015-A
Country	US
Kind code	B2
Filing date	Aug 21, 2018
Priority date	Aug 23, 2017
Publication date	Mar 23, 2021
Grant date	Mar 23, 2021

Abstract

An air conditioning system of a motor vehicle with a refrigeration circuit and with a coolant circuit. The refrigeration circuit includes a compressor, a refrigerant-coolant heat exchanger operable as a condenser/gas cooler for the heat exchange between the refrigerant and the coolant of the coolant circuit, a first expansion device, and a first refrigerant-air heat exchanger for conditioning the intake air for the passenger compartment. The coolant circuit includes a conveying device, a first coolant-air heat exchanger for heating the intake air for the passenger compartment and the refrigerant-coolant heat exchanger. The refrigeration circuit further includes a second refrigerant-air heat exchanger for conditioning the intake air for the passenger compartment with a second expansion device located upstream in flow direction of the refrigerant. The coolant circuit is formed with a second coolant-air heat exchanger for heating the intake air for the passenger compartment.

First claim

The invention claimed is:

1. An air conditioning system of a motor vehicle, the air conditioning system comprising:
a refrigeration circuit; and
a coolant circuit, wherein the refrigeration circuit further comprises:
a compressor;
a refrigerant-coolant heat exchanger which can be operated as a condenser/gas cooler for heat exchange between a refrigerant and a coolant of the coolant circuit;
a first refrigerant-air heat exchanger for conditioning intake air for a passenger compartment; and
a first expansion device located upstream with respect to the first refrigerant-air heat exchanger in a flow direction of the refrigerant;

wherein the coolant circuit further comprises:
a first conveying device;
a first coolant-air heat exchanger for heating the intake air for the passenger compartment as well as the refrigerant-coolant heat exchanger

wherein the refrigeration circuit includes a second refrigerant-air heat exchanger for conditioning the intake air for the passenger compartment,
and wherein a second expansion device is located upstream with respect to the second refrigerant-air heat exchanger in the flow direction of the refrigerant, and the coolant circuit includes a second coolant-air heat exchanger for heating the intake air for the passenger compartment, wherein the first expansion device and the first refrigerant-air heat exchanger are arranged within a first flow path of the refrigeration circuit, wherein the second expansion device and the second refrigerant-air heat exchanger are arranged within a second flow path of the refrigeration circuit, and wherein the first flow path and the second flow path are arranged to enable throughflow parallel to one another, wherein the first flow path with the first expansion device and with the first refrigerant-air heat exchanger and the second flow path with the second expansion device and with the second refrigerant-air heat exchanger are each formed to extend from a branch point to a first opening point, and wherein an expansion device is formed downstream with respect to the first opening point in the flow direction of the refrigerant or in each case an expansion device is formed downstream with respect to the first refrigerant-air heat exchanger within the first flow path and with respect to the second refrigerant-air heat exchanger within the second flow path in the flow direction of the refrigerant.

2. The air conditioning system according to claim 1 , wherein the first refrigerant-air heat exchanger of the refrigeration circuit and the first coolant-air heat exchanger of the coolant circuit are arranged within a first component of an air conditioning unit and in a manner so that the first refrigerant-air heat exchanger of the refrigeration circuit and the first coolant-air heat exchanger can be supplied in series, in a flow direction of the intake air for the passenger compartment, and wherein the second refrigerant-air heat exchanger of the refrigeration circuit and the second coolant-air heat exchanger of the coolant circuit are arranged within a second component of the air conditioning unit.

3. The air conditioning system according to claim 2 , wherein the first component of the air conditioning unit is configured so air discharged from the passenger compartment or environmental air or a mixture of the air discharged from the passenger compartment and the environmental air can flow through the first component.

4. The air conditioning system according to claim 2 , wherein the second component of the air conditioning unit is configured so air discharged from the passenger compartment can flow through the second component, wherein the air can be discharged into the passenger compartment and/or into the environment.

5. An air conditioning system of a motor vehicle, the air conditioning system comprising:
a refrigeration circuit; and
a coolant circuit, wherein the refrigeration circuit further comprises:
a compressor;
a refrigerant-coolant heat exchanger which can be operated as a condenser/gas cooler for heat exchange between a refrigerant and a coolant of the coolant circuit;
a first refrigerant-air heat exchanger for conditioning intake air for a passenger compartment; and
a first expansion device located upstream with respect to the first refrigerant-air heat exchanger in a flow direction of the refrigerant;

wherein the coolant circuit further comprises:
a first conveying device;
a first coolant-air heat exchanger for heating the intake air for the passenger compartment as well as the refrigerant-coolant heat exchanger

wherein the refrigeration circuit includes a second refrigerant-air heat exchanger for conditioning the intake air for the passenger compartment,
wherein a second expansion device is located upstream with respect to the second refrigerant-air heat exchanger in the flow direction of the refrigerant, and the coolant circuit includes a second coolant-air heat exchanger for heating the intake air for the passenger compartment,
wherein the first refrigerant-air heat exchanger of the refrigeration circuit and the first coolant-air heat exchanger of the coolant circuit are arranged within a first component of an air conditioning unit and in a manner so that the first refrigerant-air heat exchanger of the refrigeration circuit and the first coolant-air heat exchanger can be supplied in series, in a flow direction of the intake air for the passenger compartment,
wherein the second refrigerant-air heat exchanger of the refrigeration circuit and the second coolant-air heat exchanger of the coolant circuit are arranged within a second component of the air conditioning unit,
wherein the second refrigerant-air heat exchanger of the refrigeration circuit and the second coolant-air heat exchanger of the coolant circuit are arranged within the second component of the air conditioning unit so the second refrigerant-air heat exchanger of the refrigeration circuit and the second coolant-air heat exchanger of the coolant circuit can be supplied with air in series, in a flow direction, wherein the second component further comprises a bypass for guiding air around the refrigerant-air heat exchanger, and wherein an air guide device is formed for distributing an air mass stream over a heat exchange surface of the second refrigerant-air heat exchanger and through the bypass.

6. An air conditioning system of a motor vehicle, the air conditioning system comprising:
a refrigeration circuit; and
a coolant circuit, wherein the refrigeration circuit further comprises:
a compressor;
a refrigerant-coolant heat exchanger which can be operated as a condenser/gas cooler for heat exchange between a refrigerant and a coolant of the coolant circuit;
a first refrigerant-air heat exchanger for conditioning intake air for a passenger compartment; and
a first expansion device located upstream with respect to the first refrigerant-air heat exchanger in a flow direction of the refrigerant;

wherein the coolant circuit further comprises:
a first conveying device;
a first coolant-air heat exchanger for heating the intake air for the passenger compartment as well as the refrigerant-coolant heat exchanger

wherein the refrigeration circuit includes a second refrigerant-air heat exchanger for conditioning the intake air for the passenger compartment,
wherein a second expansion device is located upstream with respect to the second refrigerant-air heat exchanger in the flow direction of the refrigerant, and the coolant circuit includes a second coolant-air heat exchanger for heating the intake air for the passenger compartment,
wherein the first refrigerant-air heat exchanger of the refrigeration circuit and the first coolant-air heat exchanger of the coolant circuit are arranged within a first component of an air conditioning unit and in

Assignees

• Hanon Systems

Inventors

• Hötzel Martin
• Durrani Navid
• Bara Christoph

Classifications

• B60H2001/00957

  comprising locations with heat exchange within the refrigerant circuit itself, e.g. cross-, counter-, or parallel heat exchange · CPC title

• B60H1/32281 Primary

  comprising a single secondary circuit, e.g. at evaporator or condenser side · CPC title

• B60H1/00921 Primary

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

• B60H2001/00942

  comprising a plurality of heat exchangers, e.g. for multi zone heating or cooling · CPC title

• B60H2001/00928

  comprising a secondary circuit · CPC title