公开(公告)号：US11300330B2

公开(公告)日：2022-04-12

申请号：US16313766

申请日：2016-06-27

Applicant: Carrier Corporation

Inventor： Scott Alan Eastman ,  Sergei F. Burlatsky ,  Joseph V. Mantese ,  Wei Xie ,  Subramanyaravi Annapragada ,  Parmesh Verma ,  Vadim V. Atrazhev ,  Vadim I. Sultanov

IPC: F25B21/00 ,  C09K5/14 ,  C08F214/22 ,  H01L37/02

Abstract: An electrocaloric element for a heat transfer system includes an electrocaloric material of a copolymer of (i) vinylidene fluoride, (ii) an addition polymerization monomer selected from tetrafluoroethylene, trifluoroethylene, vinyl fluoride, or combinations thereof, and (iii) a halogenated addition polymerization monomer larger than vinylidene fluoride. It is also provided that: (a) the monomer (ii) includes an addition polymerization monomer smaller than trifluoroethylene, (b) at least one of the addition polymerization monomers (ii) or (iii) is a chiral monomer, and the copolymer includes syndiotactic ordered segments of chiral monomer units, and/or (c) at least one of the addition polymerization monomers (ii) or (iii) comprises chlorine, and the copolymer includes an ordered distribution of monomer units comprising chlorine along the copolymer polymer backbone.