Refrigeration cycle device for vehicle

Patent metadata

Field	Value
Publication number	US-11920077-B2
Application number	US-201917260775-A
Country	US
Kind code	B2
Filing date	Jul 16, 2019
Priority date	Jul 17, 2018
Publication date	Mar 5, 2024
Grant date	Mar 5, 2024

Abstract

No studies have been made regarding what kinds of refrigerants should be used in a refrigeration cycle device for a vehicle. An air conditioner ( 1 ) for a vehicle includes a refrigerant circuit ( 10 ) and a refrigerant that is sealed in the refrigerant circuit ( 10 ). The refrigerant circuit ( 10 ) includes a compressor ( 80 ), a first heat exchanger ( 85 ), which serves as a heat dissipater in a dehumidifying heating mode, an outside-air heat exchanger ( 82 ), a cooling control valve ( 87 ), and a second heat exchanger ( 86 ), which serves as an evaporator in the dehumidifying heating mode. The refrigerant is a refrigerant having a low GWP.

First claim

The invention claimed is:

1. A refrigeration method comprising operating a refrigeration cycle device for a vehicle,
wherein the operating comprises applying a refrigerant as an alternative refrigerant for R1234yf alone,
wherein a first equipment designed for operation using R1234yf alone is operated using the alternative refrigerant, optionally with changes of a few parts and adjustment of the first equipment, or
a second equipment designed for operation using the alternative refrigerant is operated for the same use as an existing use with R1234yf by using the alternative refrigerant,
wherein:
the refrigeration cycle device comprises a refrigerant circuit,
the refrigerant circuit comprises a compressor, a condenser, a decompressor, and an evaporator;
the refrigerant is sealed in the refrigerant circuit,
the refrigerant comprises at least trans-1,2-difluoroethylene (HFO-1132(E)) and 2,3,3,3-tetrafluoropropene (HFO-1234yf), and
the refrigerant comprises HFO-1132(E) and HFO-1234yf in such amounts that the sum of HFO-1132(E) and HFO-1234yf is 99.7 mass % or more.

2. The refrigeration method according to claim 1 , wherein
the refrigerant comprises HFO-1132(E) and HFO-1234yf,
a content rate of HFO-1132(E) is 35.0 to 65.0 mass % and a content rate of HFO-1234yf is 65.0 to 35.0 mass %, based on a total mass of HFO-1132(E) and HFO-1234yf, and
an evaporating temperature is −75 to −5° C.

3. The refrigeration method according to claim 1 , wherein a content rate of HFO-1132(E) is 41.3 to 53.5 mass % and a content rate of HFO-1234yf is 58.7 to 46.5 mass %, based on a total mass of HFO-1132(E) and HFO-1234yf.

4. The refrigeration method according to claim 2 , wherein the refrigerant consists only of HFO-1132(E) and HFO-1234yf.

5. The refrigeration method according to claim 1 , wherein
the refrigerant comprises HFO-1132(E) and HFO-1234yf, and
a content rate of HFO-1132(E) is 40.5 to 49.2 mass % and a content rate of HFO-1234yf is 59.5 to 50.8 mass %, based on a total mass of HFO-1132(E) and HFO-1234yf.

6. The refrigeration method according to claim 5 , wherein the refrigerant consists only of HFO-1132(E) and HFO-1234yf.

7. The refrigeration method according to claim 1 , wherein
the refrigerant comprises HFO-1132(E) and HFO-1234yf, and
a content rate of HFO-1132(E) is 31.1 to 39.8 mass % and a content rate of HFO-1234yf is 68.9 to 60.2 mass %, based on a total mass of HFO-1132(E) and HFO-1234yf.

8. The refrigeration method according to claim 1 , wherein a content rate of HFO-1132(E) is 31.1 to 37.9 mass % and a content rate of HFO-1234yf is 68.9 to 62.1 mass %, based on a total mass of HFO-1132(E) and HFO-1234yf.

9. The refrigeration method according to claim 7 , wherein the refrigerant consists only of HFO-1132(E) and HFO-1234yf.

10. The refrigeration method according to claim 1 , wherein
the refrigerant comprises HFO-1132(E) and HFO-1234yf, 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.

11. The refrigeration method according to claim 10 , wherein the refrigerant consists only of HFO-1132(E) and HFO-1234yf.

12. The refrigeration method according to claim 1 , wherein the refrigerant comprises HFO-1132(E) and HFO-1234yf,
a content of HFO-1132(E) is 12.1 to 72.0 mass % and a content of HFO-1234yf is 87.9 to 28.0 mass %, based on a total mass of HFO-1132(E) and HFO-1234yf, and
the device is in-car air conditioning equipment.

Assignees

• Daikin Ind Ltd

Inventors

• Kumakura Eiji
• Furusho Kazuhiro
• Tanaka Masaru
• Ohkubo Shun
• Itano Mitsushi
• Yotsumoto Yuuki
• Mizuno Akihito
• Gotou Tomoyuki
• Yamada Yasufu
• Tsuchiya Tatsumi
• Gobou Kenji
• Kuroki Hitomi
• Karube Daisuke
• Takakuwa Tatsuya
• Tsuda Tetsushi

Classifications

• C10N2040/30

  Refrigerators lubricants {or compressors lubricants} · CPC title

• C10M2209/1033

  used as base material · CPC title

• C10M2207/2835

  used as base material · CPC title

• C10M2207/0406

  used as base material · CPC title

• C10M171/008

  Lubricant compositions compatible with refrigerants · CPC title