# US 2020/0400352 A1 · Sheath-integrated magnetic refrigeration member, production method for the member and magnetic refrigeration system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0400352 A1 - Document ID: US20200400352A1 - Status: Published application - Kind: A1 - Application number: 16/904,647 - Filed: 2020-06-18 - Published: 2020-12-24 - Earliest claimed: 2019-06-19 - Assignees: Shin-Etsu Chemical Co., Ltd. - Applicants: Shin-Etsu Chemical Co., Ltd. - Inventors: Hajime Nakamura - Web page: https://patentgrep.com/patent/US20200400352A1 ## CPC - F25B 21/00: Machines, plants or systems, using electric or magnetic effects - H01F 1/012: {adapted for magnetic entropy change by magnetocaloric effect, e.g. used as magnetic refrigerating material (refrigeration systems using magnetic effects F25B21/00)} - H01F 1/015: {Metals or alloys} - H01F 41/0246: {Manufacturing of magnetic circuits by moulding or by pressing powder (magnetic cores made by moulding or by pressing powder H01F27/255; soft magnetic particles H01F1/20, H01F1/36)} - F25B 2321/0021: with a static fixed magnet - F25B 2321/0022: with a rotating or otherwise moving magnet - Y02B 30/00: Energy efficient heating, ventilation or air conditioning [HVAC] - F25B: REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS - H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES - Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS ## Abstract Provided are a sheath-integrated magnetic refrigeration member capable of preventing degradation of a magnetic refrigeration material with time in a magnetic refrigeration system without lowering the magnetocaloric effect and the thermal conductivity of the magnetic refrigeration material and its production method, and a magnetic refrigeration system using the sheath-integrated magnetic refrigeration member. The invention is a linear or thin band-like sheath-integrated magnetic refrigeration member including a sheath part 1 containing a non-ferromagnetic metal material and a core part 2 containing a magnetic refrigeration material. The production method for a sheath-integrated magnetic refrigeration member of the invention includes a step of filling a powder of a magnetic refrigeration material into the cavity of a pipe containing a non-ferromagnetic metal material, and a step of linearly working the pipe filled with a powder of a magnetic refrigeration material according to one or more working methods selected from the group consisting of grooved reduction rolling, swaging and drawing. The magnetic refrigeration system of the invention is provided with a means of operating in an AMR (active magnetic refrigeration) cycle using the sheath-integrated magnetic refrigeration member of the invention as the AMR bed. ## Claims ### Claim 1 A linear or thin band-like sheath-integrated magnetic refrigeration member comprising: a sheath part containing a non-ferromagnetic metal material and a core part containing a magnetic refrigeration material. ### Claim 2 (depends on 1) The sheath-integrated magnetic refrigeration member according to claim 1, wherein the non-ferromagnetic metal material contains one or more materials selected from the group consisting of Cu, a Cu alloy, Al, an Al alloy, and a non-ferromagnetic SUS. ### Claim 3 (depends on 1) The sheath-integrated magnetic refrigeration member according to claim 1, wherein the magnetic refrigeration material contains one or more alloys selected from the group consisting of an R—Fe—Si alloy, where R is a rare earth element, and an R—Fe—Si—H alloy, where R is a rare earth element, in which the main component has an NaZn13 type structure. ### Claim 4 (depends on 3) The sheath-integrated magnetic refrigeration member according to claim 3, wherein the composition of the alloy differs in the lengthwise direction of the sheath-integrated magnetic refrigeration member. ### Claim 5 (depends on 1) The sheath-integrated magnetic refrigeration member according to claim 1, wherein a void ratio of the core part is less than 20%. ### Claim 6 (depends on 1) The sheath-integrated magnetic refrigeration member according to claim 1, wherein the sheath-integrated magnetic refrigeration member deforms two-dimensionally or three-dimensionally. ### Claim 7 (depends on 1) The sheath-integrated magnetic refrigeration member according to claim 1, provided with a metal mesh or a porous metal plate bonded to the sheath part. ### Claim 8 (depends on 7) The sheath-integrated magnetic refrigeration member according to claim 7, wherein the sheath part is bonded to the metal mesh or the porous metal plate according to one or more bonding methods selected from the group consisting of brazing, soldering and adhering with an adhesive. ### Claim 9 A method for producing a sheath-integrated magnetic refrigeration member, comprising: filling a powder of a magnetic refrigeration material into the cavity of a pipe containing a non-ferromagnetic metal material, and linearly working the pipe filled with a powder of a magnetic refrigeration material according to one or more working methods selected from the group consisting of grooved reduction rolling, swaging and drawing. ### Claim 10 (depends on 9) The method for producing a sheath-integrated magnetic refrigeration member according to claim 9, wherein the magnetic refrigeration material contains one or more alloys selected from the group consisting of an R—Fe—Si alloy, where R is a rare earth element, and an R—Fe—Si—H alloy, where R is a rare earth element, in which the main component has an NaZn13 type structure. ### Claim 11 (depends on 9) The method for producing a sheath-integrated magnetic refrigeration member according to claim 9, wherein the cross-sectional shape of the linearly-worked pipe filled with a powder of a magnetic refrigeration material is one or more shapes selected from the group consisting of a circular shape, a semicircular shape and a square shape. ### Claim 12 (depends on 9) The method for producing a sheath-integrated magnetic refrigeration member according to claim 9, further comprising thin band-like working the linearly-worked pipe filled with a powder of a magnetic refrigeration material according to reduction rolling. ### Claim 13 (depends on 1) A magnetic refrigeration system provided with a means of operating in an AMR (active magnetic refrigeration) cycle using the sheath-integrated magnetic refrigeration member according to claim 1 as the AMR bed.