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公开(公告)号：US11728074B2
公开(公告)日：2023-08-15
申请号：US16969858
申请日：2019-02-20
Inventor： Robin Ihnfeldt , Eunjeong Kim , Sungho Jin , Renkun Chen , Xia Xu
CPC classification number: H01F1/015 , C22C28/00 , F25B21/00 , H01F1/058 , C22C2202/02 , F25B2321/002
Abstract: This invention relates to magnetocaloric materials comprising alloys useful for magnetic refrigeration applications. In some embodiments, the disclosed alloys may be Cerium, Neodymium, and/or Gadolinium based compositions that are fairly inexpensive, and in some cases exhibit only 2nd order magnetic phase transitions near their curie temperature, thus there are limited thermal and structural hysteresis losses. This makes these compositions attractive candidates for use in magnetic refrigeration applications. Surprisingly, the performance of the disclosed materials is similar or better to many of the known expensive rare-earth based magnetocaloric materials.
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公开(公告)号：US20180066875A1
公开(公告)日：2018-03-08
申请号：US15694616
申请日：2017-09-01
Inventor： Robin Veronica Ihnfeldt , Xia Xu , Renkun Chen , Sungho Jin , Jianlin Zheng
Abstract: This invention relates to a cooling device which utilizes both thermoelectric and magnetocaloric mechanisms for enhanced cooling applications. Using high thermal conductivity magnetocaloric composites in conjunction with thermoelectric elements acting as thermal switches which are electrically coupled to a magnetization and demagnetization cycle enables the use of larger quantities of magnetocaloric material, and high efficiency solid state cooling can be achieved. Solid state cooling devices are useful for a variety of industrial applications which require cooling, such as, but not limited to cooling of microelectronic devices, cooling on space platforms, etc.
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公开(公告)号：US10371416B2
公开(公告)日：2019-08-06
申请号：US14398722
申请日：2013-05-06
Applicant: The Regents of the University of California
Inventor： Sungho Jin , Renkun Chen , Zhaowei Liu , Tae Kyoung Kim
IPC: F24S70/225 , F24S70/30 , F24S70/25 , G02B1/14 , G02B1/118 , G02B5/20 , G02B5/22 , B05D5/06 , G02B1/00 , G02B5/00 , B82Y20/00 , F24S70/60 , F24S70/20 , F24S20/20 , F24S10/70
Abstract: Techniques, systems, devices and materials are disclosed for spectrally selective coatings for optical surfaces having high solar absorptivity, low infrared emissivity, and strong durability at elevated temperatures. In one aspect, a spectrally selective coating includes a substrate formed of a light absorbing material, and a composite material formed over the substrate and including nanoparticles dispersed in a dielectric material, in which the composite material forms a coating capable of absorbing solar energy in a selected spectrum and reflecting the solar energy in another selected spectrum.
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4.发明申请公开(公告)号：US20170138646A1
公开(公告)日：2017-05-18
申请号：US15290947
申请日：2016-10-11
Inventor： Robin Veronica Ihnfeldt , Sungho Jin , Renkun Chen , Dongwon Chun , Chin-Hung Liu
CPC classification number: F25B21/00 , F25B21/02 , F25B2321/0021 , F25B2321/0022 , Y02B30/66
Abstract: This invention relates to a cooling device which utilizes both thermoelectric and magnetocaloric mechanisms for enhanced cooling applications. The incorporation of a magnetocaloric mechanism into a thermoelectric device provides additional cooling on the cold side of the device, and may improve the device efficiency, which is useful for many industrial applications, including cooling of microelectronic devices. Embodiments of the invention provide a cooling device comprising a hot side, a cold side, at least one thermoelectric element, at least one magnetocaloric material, at least one permanent magnet, and at least one mechanical movement system. In some embodiments, the magnetocaloric component of the cooling device is optimized to provide enhanced cooling on the cold side of the cooling device.
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公开(公告)号：US12178130B2
公开(公告)日：2024-12-24
申请号：US17295851
申请日：2019-11-20
Applicant: The Regents of the University of California
Inventor： Renkun Chen , Sahngki Hong
Abstract: Thermoelectric devices (TE) devices may be used to power wearable electronics, such as watches and sensors by harvesting heat from the body. These TE devices may fully power or partially power the wearable devices to extend a usage time, or to recharge a battery. In other example embodiments, TE devices can be used to provide heating and/or cooling. The TE devices can be integrated into garments such as clothes, vests, and armbands for outdoor and indoor environments. For outdoor environments, applications include, but are not limited to, sports such as golfing, bicycling, running, walking, training, soccer, hiking, and other outdoor activities related to occupations, such as construction, fire-fighting, military operations, law enforcement, farming, underground mining, and so on. In other example embodiments, TE devices can be used to provide thermal camouflaging for people and objects so as to not be seen by thermal imaging devices.
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Patent Agency Ranking
公开(公告)号：US11225703B2
公开(公告)日：2022-01-18
申请号：US16476047
申请日：2018-01-08
Inventor： Robin Ihnfeldt , Sungho Jin , Renkun Chen , Xia Xu , Elizabeth Caldwell , Eunjeong Kim
Abstract: This invention relates to magnetocaloric materials comprising ternary alloys useful for magnetic refrigeration applications. The disclosed ternary alloys are Cerium, Neodymium, and/or Gadolinium based compositions that are fairly inexpensive, and in some cases exhibit only 2nd order magnetic phase transitions near their curie temperature, thus there are no thermal and structural hysteresis losses. This makes these compositions attractive candidates for use in magnetic refrigeration applications. The performance of the disclosed materials is similar or better to many of the known expensive rare-earth based magnetocaloric materials.
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公开(公告)号：US20220013704A1
公开(公告)日：2022-01-13
申请号：US17295851
申请日：2019-11-20
Applicant: The Regents of the University of California
Inventor： Renkun Chen , Sahngki Hong
Abstract: Thermoelectric devices (TE) devices may be used to power wearable electronics, such as watches and sensors by harvesting heat from the body. These TE devices may fully power or partially power the wearable devices to extend a usage time, or to recharge a battery. In other example embodiments, TE devices can be used to provide heating and/or cooling. The TE devices can be integrated into garments such as clothes, vests, and armbands for outdoor and indoor environments. For outdoor environments, applications include, but are not limited to, sports such as golfing, bicycling, running, walking, training, soccer, hiking, and other outdoor activities related to occupations, such as construction, fire-fighting, military operations, law enforcement, farming, underground mining, and so on. In other example embodiments, TE devices can be used to provide thermal camouflaging for people and objects so as to not be seen by thermal imaging devices.
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公开(公告)号：US20220252308A1
公开(公告)日：2022-08-11
申请号：US17630443
申请日：2020-07-28
Inventor： Robin Ihnfeldt , Renkun Chen , Sungho Jin , Tianshi Feng , Sarath Adapa
IPC: F25B21/00
Abstract: Systems and methods disclosed herein relate to a cryogenic refrigeration system which may use a compression based cryocooler or liquid nitrogen pre-cool to cool a medium to ˜80K, and may in conjunction with a magnetic refrigeration system operating in the sub-80K temperature regime to provide cooling to a medium to temperatures below 80K. In some embodiments, the disclosed system may be useful for cooling on the order of about 3 kg/day to about 300 kg/day of hydrogen gas to liquid form, with higher efficiency than a standard vapor compression based system. This higher efficiency may make the system a more attractive candidate for use in cryogenic cooling applications.
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公开(公告)号：US20210065941A1
公开(公告)日：2021-03-04
申请号：US16969858
申请日：2019-02-20
Inventor： Robin Ihnfeldt , Eunjeong Kim , Sungho Jin , Renkun Chen , Xia Xu
Abstract: This invention relates to magnetocaloric materials comprising alloys useful for magnetic refrigeration applications. In some embodiments, the disclosed alloys may be Cerium, Neodymium, and/or Gadolinium based compositions that are fairly inexpensive, and in some cases exhibit only 2nd order magnetic phase transitions near their curie temperature, thus there are limited thermal and structural hysteresis losses. This makes these compositions attractive candidates for use in magnetic refrigeration applications. Surprisingly, the performance of the disclosed materials is similar or better to many of the known expensive rare-earth based magnetocaloric materials.
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公开(公告)号：US10451321B2
公开(公告)日：2019-10-22
申请号：US15694616
申请日：2017-09-01
Inventor： Robin Veronica Ihnfeldt , Xia Xu , Renkun Chen , Sungho Jin , Jianlin Zheng
Abstract: This invention relates to a cooling device which utilizes both thermoelectric and magnetocaloric mechanisms for enhanced cooling applications. Using high thermal conductivity magnetocaloric composites in conjunction with thermoelectric elements acting as thermal switches which are electrically coupled to a magnetization and demagnetization cycle enables the use of larger quantities of magnetocaloric material, and high efficiency solid state cooling can be achieved. Solid state cooling devices are useful for a variety of industrial applications which require cooling, such as, but not limited to cooling of microelectronic devices, cooling on space platforms, etc.
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