# US 12,000,658 B2 · Heat transport system and transportation machine > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,000,658 B2 - Document ID: US12000658B2 - Status: Granted - Kind: B2 - Application number: 17/418,248 - Filed: 2019-12-24 - Published: 2022-03-24 - Granted: 2024-06-04 - Earliest claimed: 2018-12-27 - Assignees: Kawasaki Jukogyo Kabushiki Kaisha - Applicants: Kawasaki Jukogyo Kabushiki Kaisha - Inventors: Yu Haruki; Keiji Sakagawa; Kazuhide Hakamada; Ryosuke Mitani - Web page: https://patentgrep.com/patent/US12000658B2 ## CPC - F28D 15/0266: {with separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers (F28D15/043 takes precedence)} - B64C 1/00: Fuselages; Constructional features common to fuselages, wings, stabilising surfaces or the like - B64D 13/06: the air being conditioned (pressurising B64D13/02) - B64D 13/08: the air being heated or cooled - B64D 37/34: Conditioning fuel, e.g. heating (during filling B64D37/18) - F28D 15/06: Control arrangements therefor - H05K 7/20327: {Accessories for moving fluid, for connecting fluid conduits, for distributing fluid or for preventing leakage, e.g. pumps, tanks or manifolds} - H05K 7/20881: {Liquid coolant with phase change} - B64D 2013/0674: {comprising liquid subsystems} - F28D 15/043: {forming loops, e.g. capillary pumped loops} - F28D 2015/0216: {having particular orientation, e.g. slanted, or being orientation-independent} - F28D 2015/0291: {comprising internal rotor means, e.g. turbine driven by the working fluid} - F28D 2021/0021: {for aircrafts or cosmonautics} - F28F 2250/06: Derivation channels, e.g. bypass - F28F 2250/08: Fluid driving means, e.g. pumps, fans - Y02T 50/50: On board measures aiming to increase energy efficiency - F28D: HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT (fluid heaters having heat generating means and heat transferring means F24H; furnaces F27; details of heat-exchange apparatus of general) - B64C: AEROPLANES; HELICOPTERS - B64D: EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - F28F: DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION (water and air traps, air venting F16) - Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION ## Abstract A heat transport system includes: a two-phase closed loop heat pipe; a pump disposed in a liquid conduit or a vapor conduit of the loop heat pipe to exert a circulation drive force on a working fluid; a tilt sensor that detects a tilt of the loop heat pipe; and a controller configured to run the pump if the tilt is greater than a predetermined tilt threshold and stop the pump if the tilt is equal to or smaller than the tilt threshold. ## Claims ### Claim 1 A heat transport system incorporated into a transportation machine, comprising: a loop heat pipe charged with a working fluid, the loop heat pipe including: an evaporator that changes at least a part of the working fluid from a liquid phase into a gas phase by heat absorbed from a heat source, a condenser located above the evaporator to change the working fluid from the gas phase into the liquid phase, a vapor conduit connecting an outlet of the evaporator and an inlet of the condenser, and a liquid conduit connecting an outlet of the condenser and an inlet of the evaporator; a pump disposed in the liquid conduit or the vapor conduit to exert a circulation drive force on the working fluid; a tilt sensor that detects a tilt of the loop heat pipe; a temperature sensor that detects a temperature of the heat source; and a controller that controls operation of the pump, wherein: the working fluid in the liquid conduit flows from the condenser to the evaporator without being subjected to an action of the pump when the pump is at rest, and is forced to flow from the condenser to the evaporator under the action of the pump when the pump is running, the controller is configured to: run the pump if the tilt is greater than a predetermined tilt threshold and the temperature of the heat source is higher than a predetermined first temperature threshold; stop the pump if the tilt is greater than the predetermine tilt threshold and the temperature of the heat source is equal to or lower than the first temperature threshold; run the pump if the tilt is equal to or smaller than the predetermined tilt threshold and the temperature of the heat source is higher than a predetermined second temperature threshold; and stop the pump if the tilt is equal to or smaller than the predetermined tilt threshold and the temperature of the heat source is equal to or lower than the second temperature threshold, and the first temperature threshold is lower than the second temperature threshold. ### Claim 2 (depends on 1) The heat transport system according to claim 1, wherein the liquid conduit includes a bypass conduit through which the working fluid flows to bypass the pump. ### Claim 3 (depends on 1) The heat transport system according to claim 1, wherein the working fluid is a temperature-sensitive magnetic fluid, and the pump includes a magnet that applies a non-uniform magnetic field to the working fluid flowing in the liquid conduit and a heater that heats the working fluid magnetized by the applied magnetic field. ### Claim 4 (depends on 1) The heat transport system according to claim 1, wherein the pump includes a tank located in the liquid conduit and a heater located inside the tank or upstream of the tank in a flow direction of the working fluid, and the pump exerts the circulation drive force on the working fluid by a pressure of a vapor resulting from heating by the heater. ### Claim 5 (depends on 1) A transportation machine comprising: a heat-generating element; and the heat transport system according to claim 1, wherein the evaporator of the heat transport system uses the heat-generating element as a heat source to evaporate the working fluid. ### Claim 6 (depends on 5) The transportation machine according to claim 5, further comprising: an outer panel exposed to an external fluid; and an interior wall located inward of the outer panel, wherein the condenser is located in a cooling chamber defined between the outer panel and the interior wall. ### Claim 7 (depends on 5) The transportation machine according to claim 5, further comprising: a fuel tank, wherein the condenser is located in a liquid phase contained in the fuel tank.