公开(公告)号：US11939515B2

公开(公告)日：2024-03-26

申请号：US17260838

申请日：2019-07-08

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Mitsushi Itano ,  Shun Ohkubo ,  Hitomi Kuroki ,  Yasufu Yamada ,  Tatsumi Tsuchiya ,  Kenji Gobou

IPC: C09K5/04 ,  F25B13/00

CPC classification number: C09K5/045 ,  F25B13/00 ,  C09K2205/22 ,  C09K2205/40

Abstract: The present disclosure provides a composition comprising a refrigerant (mixed refrigerant), the composition having three types of performance; i.e., a coefficient of performance (COP) and a refrigerating capacity (Cap) that are equivalent to or higher than those of R404A and/or R410A, and a sufficiently low GWP. The present disclosure specifically provides a composition comprising a refrigerant, the refrigerant comprising difluoromethane (HFC-32), 2,3,3,3-tetrafluoropropene (HFO-1234yf), and at least one of 1,1-difluoroethylene (HFO-1132a) and tetrafluoroethylene (FO-1114).

公开(公告)号：US11912922B2

公开(公告)日：2024-02-27

申请号：US17260762

申请日：2019-07-16

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Shinichi Fujinaka ,  Masaru Tanaka ,  Shun Ohkubo ,  Mitsushi Itano ,  Yuuki Yotsumoto ,  Akihito Mizuno ,  Tomoyuki Gotou ,  Yasufu Yamada ,  Hitomi Kuroki ,  Tatsumi Tsuchiya ,  Kenji Gobou ,  Daisuke Karube ,  Tatsuya Takakuwa

IPC: C09K5/04 ,  F25B9/00

CPC classification number: C09K5/045 ,  F25B9/006 ,  C09K2205/126 ,  C09K2205/22 ,  C09K2205/32

Abstract: A showcase includes a refrigerant circuit and a refrigerant enclosed in the refrigerant circuit. The refrigerant circuit includes a compressor (121), a radiator (122), an expansion valve (123), and an evaporator (124). The refrigerant is a low-GWP refrigerant.

公开(公告)号：US11834601B2

公开(公告)日：2023-12-05

申请号：US17374253

申请日：2021-07-13

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Shun Ohkubo ,  Mitsushi Itano ,  Yuuki Yotsumoto ,  Akihito Mizuno ,  Tomoyuki Gotou ,  Yasufu Yamada

IPC: C09K5/04 ,  C10M107/24 ,  C10M107/34 ,  C10N40/30

CPC classification number: C09K5/045 ,  C10M107/24 ,  C10M107/34 ,  C09K2205/122 ,  C09K2205/126 ,  C09K2205/22 ,  C10M2209/043 ,  C10M2209/1023 ,  C10M2209/1033 ,  C10N2040/30

Abstract: The present disclosure provides a composition comprising a refrigerant that has characteristics of having a coefficient of performance (COP) and a refrigerating capacity equivalent to or higher than those of R404A, and having a sufficiently low GWP. More specifically, the present disclosure provides a composition comprising a refrigerant, the refrigerant comprising trans-1,2-difluoroethylene (HFO-1132(E)), difluoromethane (HFC-32), and 2,3,3,3-tetrafluoropropene (HFO-1234yf), wherein the total concentration of the three components is 99.5% by mass or more, based on the entire refrigerant, and three components have a mass ratio that falls within a region surrounded by a figure passing through the following 4 points in a ternary composition diagram whose three vertices represent the three components:

point A (HFO-1132(E)/HFC-32/HFO-1234yf=51.8/1.0/47.2 mass %),
point B (HFO-1132(E)/HFC-32/HFO-1234yf=35.3/1.0/63.7 mass %),
point C (HFO-1132(E)/HFC-32/HFO-1234yf=10.1/18.0/71.9 mass %), and
point D (HFO-1132(E)/HFC-32/HFO-1234yf=27.8/18.0/54.2 mass %).

公开(公告)号：US11441802B2

公开(公告)日：2022-09-13

申请号：US16913506

申请日：2020-06-26

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Mitsushi Itano ,  Daisuke Karube ,  Yuuki Yotsumoto ,  Kazuhiro Takahashi ,  Yuzo Komatsu ,  Shun Ohkubo ,  Tatsuya Takakuwa ,  Tetsushi Tsuda ,  Yuuichi Yanagi

IPC: F24F11/30 ,  F24F1/0003 ,  F24F1/0007 ,  F25B9/00 ,  F24F1/30 ,  F24F13/02 ,  F24F13/20 ,  F24F1/0068

Abstract: An air conditioning apparatus 1 includes a compressor (321), an indoor heat exchanger (242) that is a use-side heat exchanger that exchanges heat with first air (F1), an outdoor heat exchanger (323) that is a heat-source-side heat exchanger that exchanges heat with second air, a refrigerant, a first duct (209), and a casing (230). The refrigerant contains at least 1,2-difluoroethylene, and circulates in the compressor (321), the indoor heat exchanger (242), and the outdoor heat exchanger (323) to repeat a refrigeration cycle. The first duct (209) supplies the first air (F1) to a plurality of rooms in an interior. The casing (230) includes a use-side space (SP2) that is connected to the first duct (209) and that accommodates the indoor heat exchanger (242). The casing (230) is configured to allow the first air (F1) after heat exchange with the refrigerant at the indoor heat exchanger (242) to be sent out to the first duct (209).

公开(公告)号：US11306234B2

公开(公告)日：2022-04-19

申请号：US17047201

申请日：2019-04-17

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Shun Ohkubo ,  Mitsushi Itano ,  Hitomi Kuroki ,  Tatsumi Tsuchiya ,  Kenji Gobou

IPC: C09K5/04 ,  F25B1/047

Abstract: The present invention provides a composition containing a refrigerant having characteristics equal to or higher than those of R23. Specifically, the present invention provides a composition containing a refrigerant, wherein the refrigerant contains (a) at least one perfluorocarbon (PFC) selected from the group consisting of PFC-14, PFC-116, PFC-c216, PFC-218, PFC-c318, and PFC-31-10, and (b) an unsaturated compound.

公开(公告)号：US20240240070A1

公开(公告)日：2024-07-18

申请号：US18619836

申请日：2024-03-28

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Mitsushi Itano ,  Satoshi Tokuno ,  Tomoyuki Gotou ,  Takashi Yoshimura ,  Takashi Usui ,  Tsubasa Nakaue

IPC: C09K5/04

CPC classification number: C09K5/045 ,  C09K2205/126 ,  C09K2205/22

Abstract: An object is to suppress disproportionation in a refrigerant comprising HFO-1132(E) when the refrigerant has a pressure of 3.0 MPa. A composition comprising a refrigerant, the refrigerant comprising trans-1,2-difluoroethylene (HFO-1132(E)), trifluoroethylene (HFO-1123), and tetrafluoropropene in a total amount of 99.5 mass % or more based on the entire refrigerant, wherein when the mass % of HFO-1132(E), HFO-1123, and tetrafluoropropene based on their sum is respectively represented by x, y, and z, coordinates (x, y, z) in a ternary composition diagram in which the sum of HFO-1132(E), HFO-1123, and tetrafluoropropene is 100 mass % are within the range of a figure surrounded by straight lines AB, BO, and OA that connect the following 3 points:



point A (44.0, 0.0, 56.0),
point B (0.0, 56.0, 44.0), and
point O (0.0, 0.0, 100.0),
or on the above straight line AB (excluding the points A and B).

公开(公告)号：US11906207B2

公开(公告)日：2024-02-20

申请号：US16913589

申请日：2020-06-26

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Eiji Kumakura ,  Takuro Yamada ,  Atsushi Yoshimi ,  Ikuhiro Iwata ,  Mitsushi Itano ,  Daisuke Karube ,  Yuuki Yotsumoto ,  Kazuhiro Takahashi ,  Tatsuya Takakuwa ,  Yuzo Komatsu ,  Shun Ohkubo

IPC: F25B13/00 ,  F25B31/00 ,  F25B5/04

CPC classification number: F25B13/00 ,  F25B5/04 ,  F25B31/004 ,  F25B2400/053 ,  F25B2400/054 ,  F25B2400/07

Abstract: A two-stage refrigeration apparatus (500) includes a first cycle (510) and a second cycle (520). The first cycle (510) includes a first compressor (511), a first condenser (512), a first expansion mechanism (513), and a first evaporator (514) that are arranged in such a manner as to be connected to the first cycle. A first refrigerant circulates through the first cycle. The second cycle (520) includes a second downstream-side condenser (523) and a second evaporator (527) that are arranged in such a manner as to be connected to the second cycle. A second refrigerant circulates through the second cycle. The first evaporator (514) and the second downstream-side condenser (523) constitute a cascade condenser (531). In the cascade condenser (531), heat is exchanged between the first refrigerant and the second refrigerant. At least one of the first refrigerant and the second refrigerant is a refrigerant mixture containing at least 1,2-difluoroethylene (HFO-1132(E)).

公开(公告)号：US11840658B2

公开(公告)日：2023-12-12

申请号：US17136514

申请日：2020-12-29

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Shun Ohkubo ,  Mitsushi Itano ,  Yuuki Yotsumoto ,  Akihito Mizuno ,  Tomoyuki Gotou ,  Yasufu Yamada

IPC: C09K5/04 ,  B60H1/32

CPC classification number: C09K5/045 ,  B60H1/32 ,  C09K2205/122 ,  C09K2205/22 ,  C09K2205/40

Abstract: The present disclosure provides a composition comprising a refrigerant characterized by having a coefficient of performance (COP) and a refrigerating capacity equivalent to or higher than those of R404A, and having a sufficiently low GWP. Specifically, the present disclosure provides a composition comprising a refrigerant, the refrigerant comprising trans-1,2-difluoroethylene (HFO-1132 (E)) and 2,3,3,3-tetrafluoropropene (HFO-1234yf), wherein HFO-1132 (E) is present in an amount of 35.0 to 65.0 mass %, and HFO-1234yf is present in an amount of 65.0 to 35.0 mass %, based on the total mass of HFO-1132 (E) and HFO-1234yf, and wherein the refrigerant is for use in operating a refrigeration cycle in which the evaporation temperature is −75 to −5° C.

公开(公告)号：US11795359B2

公开(公告)日：2023-10-24

申请号：US17374253

申请日：2021-07-13

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Shun Ohkubo ,  Mitsushi Itano ,  Yuuki Yotsumoto ,  Akihito Mizuno ,  Tomoyuki Gotou ,  Yasufu Yamada

IPC: C09K5/04 ,  C10M107/24 ,  C10M107/34 ,  C10N40/30

CPC classification number: C09K5/045 ,  C10M107/24 ,  C10M107/34 ,  C09K2205/122 ,  C09K2205/126 ,  C09K2205/22 ,  C10M2209/043 ,  C10M2209/1023 ,  C10M2209/1033 ,  C10N2040/30

Abstract: The present disclosure provides a composition comprising a refrigerant that has characteristics of having a coefficient of performance (COP) and a refrigerating capacity equivalent to or higher than those of R404A, and having a sufficiently low GWP. More specifically, the present disclosure provides a composition comprising a refrigerant, the refrigerant comprising trans-1,2-difluoroethylene (HFO-1132(E)), difluoromethane (HFC-32), and 2,3,3,3-tetrafluoropropene (HFO-1234yf), wherein the total concentration of the three components is 99.5% by mass or more, based on the entire refrigerant, and three components have a mass ratio that falls within a region surrounded by a figure passing through the following 4 points in a ternary composition diagram whose three vertices represent the three components:

point A (HFO-1132(E)/HFC-32/HFO-1234yf=51.8/1.0/47.2 mass %),
point B (HFO-1132(E)/HFC-32/HFO-1234yf=35.3/1.0/63.7 mass %),
point C (HFO-1132(E)/HFC-32/HFO-1234yf=10.1/18.0/71.9 mass %), and
point D (HFO-1132(E)/HFC-32/HFO-1234yf=27.8/18.0/54.2 mass %).

公开(公告)号：US11549695B2

公开(公告)日：2023-01-10

申请号：US16911952

申请日：2020-06-25

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Mitsushi Itano ,  Daisuke Karube ,  Yuuki Yotsumoto ,  Kazuhiro Takahashi ,  Tatsuya Takakuwa ,  Yuzo Komatsu ,  Shun Ohkubo ,  Tetsushi Tsuda ,  Yumi Toda ,  Takeo Abe

IPC: F24F1/22 ,  C09K5/04

Abstract: A heat exchange unit is provided with which, even if a flammable refrigerant is used, the likelihood of the refrigerant reaching an electric component unit is reduced. An outdoor unit (20) constitutes a portion of an air-conditioning apparatus (1), and is connected to an indoor unit (30) via a liquid-side refrigerant connection pipe (6) and a gas-side refrigerant connection pipe (5). The outdoor unit (20) includes an outdoor housing (50), an outdoor heat exchanger (23) disposed inside the outdoor housing (50) and in which a refrigerant flows, a liquid-side shutoff valve (29) connected to the liquid-side refrigerant connection pipe (6), a gas-side shutoff valve (28) connected to the gas-side refrigerant connection pipe (5), and an outdoor electric component unit (8) disposed inside the outdoor housing (50). The refrigerant is a flammable refrigerant containing at least 1,2-difluoroethylene. When the outdoor unit (20) is in its installed state, the lower end of the outdoor electric component unit (8) is positioned above the liquid-side shutoff valve (29) and the gas-side shutoff valve (28).