# US 11,440,662 B2 · Dry ice draw through galley cooling > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,440,662 B2 - Document ID: US11440662B2 - Status: Granted - Kind: B2 - Application number: 16/519,658 - Filed: 2019-07-23 - Published: 2019-11-14 - Granted: 2022-09-13 - Earliest claimed: 2014-03-10 - Assignees: The Boeing Company - Applicants: The Boeing Company - Inventors: Bryce A. Vandyke; Marcus K. Richardson; Chao-Hsin Lin - Web page: https://patentgrep.com/patent/US11440662B2 ## CPC - B64D 11/04: Galleys - A47B 31/02: with heating, cooling or ventilating means - B64D 11/0007: {Devices specially adapted for food or beverage distribution services} - F25D 3/125: {Movable containers} - B62B 2204/04: comprising a cooling unit - B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT - A47B: TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE (furniture jointing F16B) - F25D: REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR (refrigerated showcases A47F3/04; thermally-insulated vessels for domestic use A47J41/00; refrigerated vehicles, see the appropriate subclasses of classes B60 - B64; containers with thermal insulation in general B65D81/38; heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants, or materials for the production of heat or cold by chemical reactions other than by combustion C09K5/00; thermally-insulated vessels for liquefied or solidified gases F17C; air-conditioning or air-humidification F24F; refrigeration machines, plants, or systems F25B; cooling of instruments or comparable apparatus without refrigeration G12B) - B62B: HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES (characterised by animal propulsion B62C; propulsion of sledges by driver or engine B62M) ## Abstract A galley cart system employs a dry ice compartment and a refrigeration compartment in a galley cart in flow communication with the dry ice compartment. A ventilation system is in interruptible flow communication with at least the refrigeration compartment and configured to receive gas discharged from at least the refrigeration compartment. ## Claims ### Claim 1 A system for venting a CO2 sublimate from a galley cart, the system comprising: a first compartment configured to contain CO2 sublimate as a primary working fluid; a refrigeration compartment, the refrigeration compartment in flow communication with the first compartment and located to receive downward gravity flow of the CO2 sublimate as the primary working fluid providing refrigeration for food in the refrigeration compartment; a vent in flow communication with the refrigeration compartment and receiving CO2 sublimate therefrom; and a separate duct system in flow communication between the vent and a second system of a vehicle, said separate duct system configured for flow of the CO2 sublimate from the vent as an alternative processing fluid or working fluid in the second system. ### Claim 2 (depends on 1) The system as defined in claim 1 wherein the second system is a wastewater system having a waste tank in flow communication with the duct system and receiving the CO2 sublimate as the processing fluid to assist in sanitizing waste water effluent. ### Claim 3 (depends on 1) The system as defined in claim 1 wherein the second system is a ram air system and includes a heat exchanger, said duct system having a conduit terminating in a nozzle upstream of the heat exchanger, CO2 sublimate discharged from the nozzle providing a cold working fluid for the heat exchanger. ### Claim 4 (depends on 1) The system as defined in claim 1 wherein the second system is a ram air inlet and wherein the duct system terminates in a nozzle expanding the CO2 sublimate into the ram air inlet as a working fluid for thrust recovery. ### Claim 5 (depends on 1) The system as defined in claim 1 wherein the first compartment comprises a dry ice compartment providing a flow of sublimated CO2 gas, and wherein the vent comprises a metering sublimation pocket in a bottom portion of the galley cart housing below the refrigeration compartment, said sublimation pocket in flow communication with the duct system. ### Claim 6 (depends on 5) The system as defined in claim 5 wherein the sublimation pocket incorporates apertures to receive the sublimated CO2 gas from and sized to meter flow of the sublimated CO2 gas through the refrigeration compartment at a predetermined rate. ### Claim 7 (depends on 6) The system as defined in claim 6 further comprising a metering vent for metering the sublimated CO2 gas from the galley cart wherein the metering vent is in the bottom portion of the galley cart and in flow communication with the sublimation pocket. ### Claim 8 (depends on 5) The system as defined in claim 5 wherein a galley includes the dry ice compartment and further comprising a first valve configured to allow sublimated gas to flow from the dry ice compartment into the refrigeration compartment with the galley cart in a docked position in the galley. ### Claim 9 (depends on 8) The system as defined in claim 8 further comprising a second valve configured to allow the sublimated gas to flow from the refrigeration compartment into the duct system with the galley cart in the docked position. ### Claim 10 (depends on 9) The system as defined in claim 9 further comprising a plenum configured to receive the sublimated gas from the dry ice compartment, said second valve in communication with the plenum. ### Claim 11 (depends on 5) The system as defined in claim 5 wherein the dry ice compartment is integral to the galley cart and contained with the refrigeration compartment within the housing.