# US 11,077,419 B2 · Adsorbent, vacuum heat insulating material having the same and refrigerator > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,077,419 B2 - Document ID: US11077419B2 - Status: Granted - Kind: B2 - Application number: 15/539,848 - Filed: 2015-12-22 - Published: 2017-12-28 - Granted: 2021-08-03 - Earliest claimed: 2014-12-26 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Nagahisa Sato; Ryo Iwamuro; Tomokazu Fukuzaki; Kenichi Nagayama; Ryosuke Kamitani; Kenji Takeuchi - Web page: https://patentgrep.com/patent/US11077419B2 ## CPC - B01J 20/04: comprising compounds of alkali metals, alkaline earth metals or magnesium - F25D 23/06: Walls (F25D23/08 takes precedence; containers with thermal insulation B65D81/38) - B01J 20/06: comprising oxides or hydroxides of metals not provided for in group B01J20/04 - F25D 11/00: Self-contained movable devices, e.g. domestic refrigerators - F25D 2201/14: using subatmospheric pressure - B01J: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS - 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) ## Abstract Described is an adsorbent, a vacuum heat insulating material having the same and a refrigerator, which are capable of adsorbing a target material in a reduced pressure environment. A refrigerator includes an outer casing forming an exterior, an inner casing provided inside the outer casing and forming a storage chamber and a vacuum heat insulating material positioned between the outer casing and the inner casing, and including an adsorbent that adsorbs a heat transfer medium. The adsorbent includes a first adsorption component provided to adsorb oxygen, and including a transition metal oxide having an oxygen deficiency structure, and a second adsorption component provided to adsorb moisture. ## Claims ### Claim 1 A refrigerator, comprising: an outer casing forming an exterior; an inner casing provided inside the outer casing and forming a storage chamber; and a vacuum heat insulating material positioned between the outer casing and the inner casing, and including an adsorbent adsorbing a heat transfer medium such that no activation treatment of the adsorbent is required and adsorption performance of the adsorbent in a vacuum state is maintained relative to adsorption performance of the adsorbent at atmospheric pressure, wherein the adsorbent comprises: a first adsorption component provided to adsorb oxygen, and including a transition metal oxide having an oxygen deficiency structure, wherein the transition metal oxide includes at least one of titanium oxide (TiO2-x), where x is 0.1 or more and 0.5 or less, or cerium oxide (CeO2-x), where x is 0.1 or more and 0.7 or less; a second adsorption component provided to adsorb moisture, and including at least one of an alkaline earth metal oxide or a zeolite; and a third adsorption component provided with palladium oxide to adsorb hydrogen, wherein a weight ratio of the third adsorption component with respect to the first adsorption component is 0.01 or more and 5 or less, and wherein the first adsorption component is provided at 0.5 mg/L to 390 mg/L with respect to a volume of a pore formed by a core material in an envelope of the vacuum heat insulating material. ### Claim 2 (depends on 1) The refrigerator according to claim 1, wherein at least one of the first adsorption component and the second adsorption component adsorbs a target material in a reduced pressure environment. ### Claim 3 (depends on 1) The refrigerator according to claim 1, wherein the alkaline earth metal oxide comprises at least one of calcium oxide, magnesium oxide, strontium oxide and barium oxide. ### Claim 4 (depends on 1) The refrigerator according to claim 1, wherein the third adsorption component adsorbs a target material in a reduced pressure environment. ### Claim 5 (depends on 1) The refrigerator according to claim 1, wherein the third adsorption component further comprises at least one of zinc oxide, palladium, titanium, nickel and magnesium. ### Claim 6 A vacuum heat insulating material comprising: a core material; an adsorbent provided to adsorb a heat transfer medium such that no activation treatment of the adsorbent is required and adsorption performance of the adsorbent in a vacuum state is maintained relative to adsorption performance of the adsorbent at atmospheric pressure; and an envelope provided to accommodate the core material and the adsorbent, wherein the adsorbent comprises: a first adsorption component provided to adsorb oxygen and including a transition metal oxide having an oxygen deficiency structure, wherein the transition metal oxide includes at least one of titanium oxide (TiO2-x), where x is 0.1 or more and 0.5 or less, or cerium oxide (CeO2-x), where x is 0.1 or more and 0.7 or less; a second adsorption component provided to adsorb moisture, and including at least one of an alkaline earth metal oxide or a zeolite; and a third adsorption component provided with palladium oxide to adsorb hydrogen, wherein a weight ratio of the third adsorption component with respect to the first adsorption component is 0.01 or more and 5 or less, and wherein the first adsorption component is provided at 0.5 mg/L to 390 mg/L with respect to a volume of a pore formed by the core material in the envelope. ### Claim 7 (depends on 6) The vacuum heat insulating material according to claim 6, wherein the alkaline earth metal oxide comprises at least one of calcium oxide, magnesium oxide, strontium oxide and barium oxide. ### Claim 8 (depends on 6) The vacuum heat insulating material according to claim 6, wherein the third adsorption component further comprises at least one of zinc oxide, palladium, titanium, nickel and magnesium. ### Claim 9 (depends on 6) The vacuum heat insulating material according to claim 6, wherein at least one of the first adsorption component and the second adsorption component adsorbs a target material in a reduced pressure environment, and the third adsorption component adsorbs a target material in a reduced pressure environment. ### Claim 10 An adsorbent comprising: a first adsorption component provided to adsorb oxygen and including a transition metal oxide having an oxygen deficiency structure, wherein the transition metal oxide includes at least one of titanium oxide (TiO2-x), where x is 0.1 or more and 0.5 or less, or cerium oxide (CeO2-x), where x is 0.1 or more and 0.7 or less; a second adsorption component provided to adsorb moisture, and including at least one of an alkaline earth metal oxide or a zeolite; and a third adsorption component provided with palladium oxide to adsorb hydrogen, wherein a weight ratio of the third adsorption component with respect to the first adsorption component is 0.01 or more and 5 or less, and wherein no activation treatment of the adsorbent is required and adsorption performance of the adsorbent in a vacuum state is maintained relative to adsorption performance of the adsorbent at atmospheric pressure, and wherein the first adsorption component is provided at 0.5 mg/L to 390 mg/L with respect to a volume of a pore formed by a core material in an envelope of a vacuum heat insulating material. ### Claim 11 (depends on 10) The adsorbent according to claim 10, wherein the alkaline earth metal oxide comprises at least one of calcium oxide, magnesium oxide, strontium oxide, and barium oxide. ### Claim 12 (depends on 10) The adsorbent according to claim 10, wherein the third adsorption component further comprises at least one of zinc oxide, palladium, titanium, nickel, and magnesium. ### Claim 13 (depends on 10) The adsorbent according to claim 10, wherein at least one of the first adsorption component and the second adsorption component adsorbs a target material in a reduced pressure environment, and the third adsorption component adsorbs a target material in a reduced pressure environment.