# US 8,539,787 B2 · Aircraft air-conditioning system for the individual air conditioning of regions of an aircraft cabin with a liquid coolant > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,539,787 B2 - Document ID: US8539787B2 - Status: Granted - Kind: B2 - Application number: 11/848,760 - Filed: 2007-08-31 - Published: 2008-03-06 - Granted: 2013-09-24 - Earliest claimed: 2006-09-01 - Assignees: Airbus Deutschland GmbH - Applicants: Wolfgang Ebigt; Stefan Repp; Andreas Frey - Inventors: Wolfgang Ebigt; Stefan Repp; Andreas Frey - Web page: https://patentgrep.com/patent/US8539787B2 ## CPC - B64D 13/08: the air being heated or cooled - B60N 2/24: for particular purposes or particular vehicles - B60N 2/5628: {coming from the vehicle ventilation system, e.g. air-conditioning system} - B60N 2/5657: {blown towards the seat surface} - B64D 11/0626: {with individual temperature or ventilation control} - B64D 2013/003: {Cabin ventilation nozzles} - B64D 2013/0674: {comprising liquid subsystems} - F24F 2221/38: Personalised air distribution - B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT - B60N: SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR - F24F: AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING (removing dirt or fumes from areas where they are produced B08B15/00; vertical ducts for carrying away waste gases from buildings E04F17/02; tops for chimneys or ventilating shafts, terminals for flues F23L17/02) ## Abstract An aircraft air-conditioning system is disclosed, which includes at least one heat exchanger to which coolant circulating in a cooling circuit of a cooling system and air are fed. The coolant cools the fed air in the heat exchanger, and the air leaving the heat exchanger enters the aircraft cabin. The coolant of the cooling system is always in the liquid state in the cooling circuit. The liquid coolant can also cool an aircraft seat or a sitting area of the aircraft seat. ## Claims ### Claim 1 An aircraft with an air-conditioning system, comprising: an aircraft cabin having a plurality of regions and a plurality of seats, including a first region that surrounds a first seat, the first seat sized to accommodate a seated passenger; at least one heat transfer device configured as a heat exchanger, which is associated with and cools the first region, and to which is fed a coolant circulating in a cooling circuit of a cooling system, wherein the coolant of the cooling system is always in a liquid state in the cooling circuit; a central air-conditioning system operatively connected to the heat exchanger and supplying air to the heat exchanger, wherein the coolant in heat exchanger cools the air, and the air leaving the heat exchanger flows into the aircraft cabin; a first seat feed line located within the first seat and connected to the central air-conditioning system, the first seat feed line discharging air from the central air-conditioning system into the first region; and a heating device that heats the air flowing into the first region, the heating device and the heat exchanger each being located within the first seat feed line, wherein a temperature of the discharged air and or an amount of discharged air is configured to be individually adjusted for the first region. ### Claim 2 (depends on 1) The aircraft with an air-conditioning system according to claim 1, wherein the heat exchanger and the heating device are configured to adjust the temperature of the air leaving the heat exchanger. ### Claim 3 (depends on 1) The aircraft with an air-conditioning system according to claim 1, further comprising: an air feed valve in the first seat feed line, wherein the air feed valve is configured to adjust the amount of air leaving the heat exchanger. ### Claim 4 (depends on 1) The aircraft with an air-conditioning system according to claim 1, further comprising: a valve associated with the heat exchanger, the valve being configured to adjust an amount of coolant flowing through the heat exchanger. ### Claim 5 (depends on 1) The aircraft with an air-conditioning system according to claim 1, wherein the heat exchanger and the heating device are arranged in series flow relationship. ### Claim 6 (depends on 1) The aircraft with an air-conditioning system according to claim 1, wherein the heat exchanger operatively communicates at least one of: the heating device for adjusting a set temperature of the air flowing into the first region, and an air feed valve for adjusting the amount of air flowing into the first region. ### Claim 7 (depends on 1) The aircraft with an air-conditioning system according to claim 1, wherein the aircraft air-conditioning system includes a plurality of heat exchangers, each of which is associated with one of the plurality of regions in the aircraft cabin, wherein the temperature of the discharged air and/or the amount of discharged air is configured to be adjusted individually for each region. ### Claim 8 (depends on 7) The aircraft with an air conditioning system according to claim 7, wherein each heat exchanger associated with at least one of the plurality of regions operatively communicates with at least one of: the heating device for adjusting a set temperature of the air flowing into the at least one of the plurality of regions, and an air feed valve for adjusting the amount of air flowing into the at least one of the plurality of regions. ### Claim 9 (depends on 1) The aircraft with an air-conditioning system according to claim 1, wherein the heat exchanger and the heating device are configured to operate independently of the central air-conditioning system that supplies at least one region of the aircraft cabin with conditioned air, thereby providing individual control of conditioned air at the first region. ### Claim 10 (depends on 1) The aircraft with an air-conditioning system according to claim 1, wherein the discharged air leaving the heat exchanger enters an interior of the first seat. ### Claim 11 (depends on 1) The aircraft with an air-conditioning system according to claim 1, wherein the at least one heat exchanger is arranged in a sitting area of the first aircraft seat. ### Claim 12 A method for air conditioning of a first region of a plurality of regions in an aircraft cabin, the first region surrounding a first aircraft seat sized to accommodate a seated passenger, the method comprising: circulating coolant in a cooling circuit of a cooling system, wherein the coolant of the cooling system is always in a liquid state in the cooling circuit; routing the circulating coolant to at least one heat transfer device configured as a heat exchanger, which is associated with the first region; and supplying air from a central air-conditioning system of the aircraft through a first seat feedline within the first air craft seat, the heat exchanger being located in the first seat feed line such that the air flows through the heat exchanger to cool the air; discharging the air cooled by the heat exchanger from the first seat feed line into the first region of the aircraft cabin; and heating air flowing through the first seat feed line with a heating device located in the first seat feed line, wherein a temperature of the discharged air and/or an amount of discharged air configured to be individually adjusted for the first region. ### Claim 13 (depends on 12) The method according to claim 12, further comprising: controlling with a control device each of the heating device, the heat exchanger, and an air feed valve controlling flow in the first seat feed line in order to adjust the temperature and/or the amount of air discharged into the first region. ### Claim 14 (depends on 1) The aircraft with an air conditioning system according to claim 1, further comprising: a control device operatively coupled to each of the heating device, the heat exchanger, and an air feed valve controlling flow in the first seat feed line, the control device configured to adjust the temperature and/or the amount of air discharged into the first region.