公开(公告)号：US10570323B2

公开(公告)日：2020-02-25

申请号：US16360173

申请日：2019-03-21

Applicant: Hitachi-Johnson Controls Air Conditioning, Inc.

Inventor： Ryo Ota ,  Koji Naito ,  Yasutaka Yoshida

IPC: C09K5/04 ,  F25B1/04 ,  F25B31/00

Abstract: Provided is a refrigerant composition as a mixed refrigerant containing refrigerant components of difluoromethane (HFC32), pentafluoroethane (HFC125), and hexafluoropropene (FO1216). The makeup of the refrigerant components in the mixed refrigerant is configured such that a global warming potential (GWP) is 750 or less, a vapor pressure at 25° C. is in a range of 1.4 to 1.8 MPa, and a flame retardant parameter Fmix represented by formula (1) below is 0.46 or more. Fmix=ΣiFixi  (1) Here, Fmix indicates a flame retardant parameter of the refrigerant composition, Fi indicates a flame retardant parameter of each of the refrigerant components, and xi indicates a molar fraction of each of the refrigerant components.