US 11,912,922 B2
Refrigerant cycle apparatus
Shinichi Fujinaka, Osaka (JP); Masaru Tanaka, Osaka (JP); Shun Ohkubo, Osaka (JP); Mitsushi Itano, Osaka (JP); Yuuki Yotsumoto, Osaka (JP); Akihito Mizuno, Osaka (JP); Tomoyuki Gotou, Osaka (JP); Yasufu Yamada, Osaka (JP); Hitomi Kuroki, Osaka (JP); Tatsumi Tsuchiya, Osaka (JP); Kenji Gobou, Osaka (JP); Daisuke Karube, Osaka (JP); and Tatsuya Takakuwa, Osaka (JP)
Assigned to DAIKIN INDUSTRIES, LTD., Osaka (JP)
Appl. No. 17/260,762
Filed by DAIKIN INDUSTRIES, LTD., Osaka (JP)
PCT Filed Jul. 16, 2019, PCT No. PCT/JP2019/027989
§ 371(c)(1), (2) Date Jan. 15, 2021,
PCT Pub. No. WO2020/017521, PCT Pub. Date Jan. 23, 2020.
Claims priority of application No. 2018-134448 (JP), filed on Jul. 17, 2018; application No. 2018-227398 (JP), filed on Dec. 4, 2018; application No. 2018-230259 (JP), filed on Dec. 7, 2018; application No. 2019-013974 (JP), filed on Jan. 30, 2019; application No. 2019-013979 (JP), filed on Jan. 30, 2019; application No. 2019-018617 (JP), filed on Feb. 5, 2019; application No. 2019-078133 (JP), filed on Apr. 16, 2019; application No. 2019-084708 (JP), filed on Apr. 25, 2019; application No. 2019-112406 (JP), filed on Jun. 17, 2019; application No. 2019-115584 (JP), filed on Jun. 21, 2019; and application No. PCT/JP2019/027031 (WO), filed on Jul. 8, 2019.
Prior Publication US 2022/0356386 A1, Nov. 10, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C09K 5/04 (2006.01); F25B 9/00 (2006.01)
CPC C09K 5/045 (2013.01) [F25B 9/006 (2013.01); C09K 2205/126 (2013.01); C09K 2205/22 (2013.01); C09K 2205/32 (2013.01)] 3 Claims
 
1. A refrigerant cycle apparatus for freezing or cold storage comprising:
a showcase,
a refrigerant circuit including a compressor, a radiator, a decompressing portion, and a heat absorber; and
a refrigerant enclosed in the refrigerant circuit,
wherein
the compressor, the radiator, the decompressing portion, and the heat absorber are built in the showcase,
a storage temperature zone of the refrigerant cycle apparatus for freezing or cold storage, wherein the storage temperature zone is suitable for temperatures of −20° C. to −25° C., 0° C. to +5° C., or +15° C. to +20° C.,
the refrigerant comprises trans-1,2-difluoroethylene (HFO-1132 (E)) and 2,3,3,3-tetrafluoropropene (HFO-1234yf) in such amounts that the sum of HFO-1132(E) and HFO-1234yf is 99.7 mass % or more, and
a content of HFO-1132(E) is 21.0 to 28.4 mass % and a content of HFO-1234yf is 79.0 to 71.6 mass %, based on a total mass of HFO-1132(E) and HFO-1234yf.