# US 8,739,555 B2 · Rotary type ultralow temperature refrigerant supply apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,739,555 B2 - Document ID: US8739555B2 - Status: Granted - Kind: B2 - Application number: 12/401,875 - Filed: 2009-03-11 - Published: 2010-03-11 - Granted: 2014-06-03 - Earliest claimed: 2008-09-09 - Assignees: Doosan Heavy Industries Construction Co., Ltd - Applicants: Je heon Jung; Jung hyun Lee; Woon sik Kwon; Heui joo Park; Chi whan Lee; Yeong chun Kim - Inventors: Je heon Jung; Jung hyun Lee; Woon sik Kwon; Heui joo Park; Chi whan Lee; Yeong chun Kim - Web page: https://patentgrep.com/patent/US8739555B2 ## CPC - F25D 19/006: {Thermal coupling structure or interface} - H02K 55/04: with rotating field windings - Y02E 40/60: Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment - 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) - H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53}) - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract The rotary type ultralow temperature refrigerant supply apparatus includes a refrigerant introduction pipe coupled to the super conductive rotor for supplying a liquid-phase ultralow temperature refrigerant cooled by the refrigeration system to the evaporator, a refrigerant withdrawal pipe disposed spaced apart from the refrigerant introduction pipe for withdrawing a gas-phase ultralow temperature refrigerant obtained through the evaporation of the liquid-phase refrigerant by the evaporator and guiding the withdrawn gas-phase ultralow temperature refrigerant to the refrigeration system, and a vacuum housing fixedly disposed outside the refrigerant introduction pipe and the refrigerant withdrawal pipe, the vacuum housing having a vacuum heat insulation space defined inside. ## Claims ### Claim 1 A rotary type ultralow temperature refrigerant supply apparatus, comprising: a rotatable refrigerant introduction pipe to supply a liquid-phase ultralow temperature refrigerant supplied from a refrigerant system to a super conductive rotor; a plurality of refrigerant withdrawal pipes disposed spaced apart from the rotatable refrigerant introduction pipe to withdraw a gas-phase ultralow temperature refrigerant obtained through the super conductive rotor and to guide the gas-phase ultralow temperature refrigerant to the refrigerant system; a vacuum housing fixedly disposed between an outside the superconductive rotor and the refrigerant system, and having a vacuum heat insulation space defined therein; a refrigerant withdrawal chamber disposed inside the vacuum housing to temporarily store the gas-phase ultralow temperature refrigerant withdrawn through the plurality of refrigerant withdrawal pipes; a fixed connection pipe having a first end fixedly connected to the refrigerant system and a second end connected to an end of the rotatable refrigerant introduction pipe, so as to connect the rotatable refrigerant introduction pipe with the refrigerant system; and a mechanical seal disposed inside the refrigerant withdrawal chamber, sealing the second end of the fixed connection pipe to the end of the rotatable refrigerant introduction pipe in a location inside the refrigerant withdrawal chamber, wherein the plurality of refrigerant withdrawal pipes are disposed around the refrigerant introduction pipe in the form of a circle at predetermined intervals, so that the plurality of refrigerant withdrawal pipes revolve around the rotatable refrigerant introduction pipe. ### Claim 2 (depends on 1) The rotary type ultralow temperature refrigerant supply apparatus according to claim 1, wherein the refrigerant introduction pipe is disposed at the same center of rotation as the super conductive rotor. ### Claim 3 (depends on 1) The rotary type ultralow temperature refrigerant supply apparatus according to claim 1, further comprising a magnetic fluid seal configured to achieve sealing between the super conductive rotor and the stationary vacuum housing. ### Claim 4 (depends on 2) The rotary type ultralow temperature refrigerant supply apparatus according to claim 2, further comprising a magnetic fluid configured to achieve sealing between the super conductive rotor and the stationary vacuum housing. ### Claim 5 (depends on 1) The rotary type ultralow temperature refrigerant supply apparatus according to claim 1, wherein at least one of the plurality of refrigerant withdrawal pipes is separated from the refrigerant introduction pipe by at least a portion of the vacuum heat insulation space. ### Claim 6 (depends on 1) The rotary ultralow temperature refrigerant supply apparatus according to claim 1, wherein the plurality of refrigerant withdrawal pipes is separated from the refrigerant introduction pipe by at least a portion of the vacuum heat insulation space. ### Claim 7 A rotary type ultralow temperature refrigerant supply apparatus comprising: a rotatable refrigerant introduction pipe to supply a liquid-phase ultralow temperature refrigerant supplied from a refrigerant system to a superconductive rotor; at least one refrigerant withdrawal pipe disposed spaced apart from the refrigerant introduction pipe to withdraw a gas-phase ultralow temperature refrigerant obtained through the superconductive rotor and to guide the gas-phase ultralow temperature refrigerant to the refrigerant system; a vacuum housing fixedly disposed between an outside the superconductive rotor and the refrigerant system, and having a vacuum heat insulation space defined therein; a refrigerant withdrawal chamber disposed inside the vacuum housing to temporarily store the gas-phase ultralow temperature refrigerant withdrawn through the at least one refrigerant withdrawal pipe; a fixed connection pipe having a first end fixedly connected to the refrigerant system and a second end connected to an end of the rotatable refrigerant introduction pipe, so as to connect the rotatable refrigerant introduction pipe with the refrigerant system; and a mechanical seal disposed inside the refrigerant withdrawal chamber, sealing the second end of the fixed connection pipe to the end of the rotatable refrigerant introduction pipe in a location inside the refrigerant withdrawal chamber. ### Claim 8 (depends on 7) The rotary type ultralow temperature refrigerant supply apparatus according to claim 7, wherein the refrigerant introduction pipe is disposed at the same center of rotation as the super conductive rotor. ### Claim 9 (depends on 7) The rotary type ultralow temperature refrigerant supply apparatus according to claim 7, wherein the at least one refrigerant withdrawal pipe is separated from the refrigerant introduction pipe by at least a portion of the vacuum heat insulation space. ### Claim 10 (depends on 7) The rotary type ultralow temperature refrigerant supply apparatus according to claim 7, further comprising a magnetic fluid seal configured to achieve sealing, between the super conductive rotor and the stationary vacuum housing. ### Claim 11 (depends on 8) The rotary type ultralow temperature refrigerant supply apparatus according to claim 8, further comprising a magnetic fluid seal configured to achieve sealing between the super conductive rotor and the stationary vacuum housing. ### Claim 12 (depends on 1) The rotary type ultralow temperature refrigerant supply apparatus according to claim 1, wherein the refrigerant withdrawal chamber is directly coupled with the plurality of refrigerant withdrawal pipes, such that the gas-phase ultralow temperature refrigerants withdrawn through the plurality of refrigerant withdrawal pipes meet in the refrigerant withdrawal chamber. ### Claim 13 (depends on 1) The rotary type ultralow temperature refrigerant supply apparatus according to claim 1, further comprising a refrigerant discharge pipe disposed at the lower part of the refrigerant withdrawal chamber, such that the gas-phase ultralow temperature refrigerant stored in the withdrawal chamber is discharged to the refrigerant system. ### Claim 14 (depends on 7) The rotary type ultralow temperature refrigerant supply apparatus according to claim 7, wherein the refrigerant withdrawal chamber is directly coupled with the at least one refrigerant withdrawal pipe, such that the gas-phase ultralow temperature refrigerants withdrawn through the at least one refrigerant withdrawal pipe meets in the refrigerant withdrawal chamber. ### Claim 15 (depends on 7) The rotary type ultralow temperature refrigerant supply apparatus according to claim 7, wherein the refrigerant withdrawal chamber is directly coupled with the at least one refrigerant withdrawal pipe, such that the gas-phase ultralow temperature refrigerants withdrawn through the at least one refrigerant withdrawal pipe meet in the refrigerant withdrawal chamber. ### Claim 16 (depends on 1) The rotary type ultralow temperature refrigerant supply apparatus according to claim 1, wherein the fixed connection pipe has a same diameter as the rotatable refrigerant introduction pipe.