Environmentally safer replacement refrigerant for freon 12-based refrigeration systems

    公开(公告)号:US06565766B1

    公开(公告)日:2003-05-20

    申请号:US09371584

    申请日:1999-08-10

    IPC分类号: C09K504

    CPC分类号: C09K5/045 C09K2205/122

    摘要: An apparatus and method wherein ozone layer-damaging dichlorodifluoromethane is substituted with a mix of less environmentally damaging refrigerants chlorodifluoroethane and tetrafluoroethane in dichlorodifluoromethane-based air-cooling systems. While less environmentally damaging than dichlorodifluoromethane, the substitute refrigerant has a temperature-pressure relationship similar to that of dichlorodifluoromethane, making the substitute refrigerant suitable for use with dichlorodifluoromethane-based air-cooling systems. The substitute refrigerant can be used alone or in combination with dichlorodifluoromethane. In either event, it is mixed with a relatively small percentage of a hydrophobic lubricating oil which is compatible with both the substitute refrigerant and with dichlorodifluoromethane.

    Refrigerant mixture comprising difluromethane, pentafluroethane and 1,1,1-trifluoroethane
    4.
    发明授权
    Refrigerant mixture comprising difluromethane, pentafluroethane and 1,1,1-trifluoroethane 失效
    包含二氟甲烷,五氟乙烷和1,1,1-三氟乙烷的制冷剂混合物

    公开(公告)号:US06524495B1

    公开(公告)日:2003-02-25

    申请号:US09710578

    申请日:2000-11-09

    IPC分类号: C09K504

    摘要: A novel refrigerant composition useful as a substitute for HCFC-22, comprising a first constituent of difluoromethane (CH2F2, HFC-32); a second constituent of pentafluoroethane (CHF2CF3, HFC-125); a third constituent of 1,1,1-trifluoroethane (CH3CF3, HFC-143a); a fourth constituent selected from the group consisting of cyclopropane (C3H6, RC-270), 1,1,1,2,3,3,3-heptafluoropropane (CF3CHFCF3, HFC-227ea), 1,1,1,2,2-pentafluoropropane (CH3CF2CF3, HFC-245cb), isobutane (CH(CH3)2CH3, R-600a), octafluorocyclobutane (C4F8, RC-318), 1,1,1,2,3,3-hexafluoropropane (CHF2CHFCF3, HFC-236ea), butane (C4H10, R-600), bis(difluoromethyl)ether (CHF2OCHF2, HFE-134) and pentafluoroethylmethylether (CF3CF2OCH3, HFE-245).

    摘要翻译: 一种可用作HCFC-22替代物的新型制冷剂组合物,其包含二氟甲烷(CH 2 F 2,HFC-32)的第一组分; 五氟乙烷(CHF 2 CF 3,HFC-125)的第二组分; 1,1,1-三氟乙烷(CH 3 CF 3,HFC-143a)的第三组分; 选自环丙烷(C 3 H 6,RC-270),1,1,1,2,3,3,3-七氟丙烷(CF 3 CHFCF 3,HFC-227ea),1,1,1,2,2 (CH 3 CF 2 CF 3,HFC-245cb),异丁烷(CH(CH 3)2 CH 3,R-600a),八氟环丁烷(C 4 F 8,RC-318),1,1,1,2,3,3-六氟丙烷(CHF 2 CHFCF 3, 236EA),丁烷(C4H10,R-600),双(二氟甲基)醚(CHF2OCHF2,HFE-134)和五氟乙基甲基醚(CF3CF2OCH3,HFE-245)。

    Refrigerant mixtures containing difluoromethane (HFC-32), pentafluoroethane (HFC-125) and 1,1,1,2-Tetrafluoroethane (HFC-134a)
    6.
    发明授权
    Refrigerant mixtures containing difluoromethane (HFC-32), pentafluoroethane (HFC-125) and 1,1,1,2-Tetrafluoroethane (HFC-134a) 失效
    含有二氟甲烷(HFC-32),五氟乙烷(HFC-125)和1,1,1,2-四氟乙烷(HFC-134a)的制冷剂混合物,

    公开(公告)号:US06508950B1

    公开(公告)日:2003-01-21

    申请号:US09692189

    申请日:2000-10-20

    IPC分类号: C09K504

    摘要: The present invention relates to novel refrigerant mixtures as a substitute for chlorodifluoromethane (CHClF2, HCFC-22). More specifically, the invention is directed to refrigerant mixtures that comprise: difluoromethane (CH2F2, HFC-32) as the first component; pentafluoroethane (CHF2CF3, HFC-125) as the second component; 1,1,1,2-tetrafluoroethane (CH2FCF3, HFC-134a) as the third component; any one of cyclopropane (C3H6, RC-270), 1,1-difluoroethane (CH3CHF2, HFC-152a), 1,1,1,2,3,3,3-heptafluoropropane (CF3CHFCF3, HFC-227ea), 1,1,1,2,2-pentafluoropropane (CH3CF2CF3, HFC-245cb), octafluorocyclobutane (C4F8, RC-318), 1,1,1,2,3,3-hexafluoropropane (CHF2CHFCF3, HFC-236ea), bis(difluoromethyl)ether (CHF2OCHF2, HFE-134), pentafluoroethylmethylether (CF3CF2OCH3, HFE-245), n-pentane (C5H12, R-601) and isopentane ((CH3)2CHCH2CH3, R-601a) as the fourth component. The refrigerant mixtures of the invention have working effects equal to that of HCFC-22 but does not have the risk of causing destruction to the ozone layer and can therefore be used as alternative refrigerants to HCFC-22.

    摘要翻译: 本发明涉及作为氯二氟甲烷(CHClF 2,HCFC-22)的替代物的新型制冷剂混合物。 更具体地说,本发明涉及制冷剂混合物,其包含:作为第一组分的二氟甲烷(CH 2 F 2,HFC-32);作为第二组分的五氟乙烷(CHF 2 CF 3,HFC-125); 1,1,1,2-四氟乙烷 ,HFC-134a)作为第三成分;环丙烷(C 3 H 6,RC-270),1,1-二氟乙烷(CH 3 CHF 2,HFC-152a),1,1,1,2,3,3,3-七氟丙烷 (CF 3 CHFCF 3,HFC-227ea),1,1,1,2,2-五氟丙烷(CH 3 CF 2 CF 3,HFC-245cb),八氟环丁烷(C 4 F 8,RC-318),1,1,1,2,3,3-六氟丙烷 CHF2CHFCF3,HFC-236ea),双(二氟甲基)醚(CHF2OCHF2,HFE-134),五氟乙基甲基醚(CF3CF2OCH3,HFE-245),正戊烷(C5H12,R-601)和异戊烷((CH 3)2CHCH2CH3,R-601a )作为第四个组成部分。 本发明的制冷剂混合物具有与HCFC-22相当的工作效果,但不具有对臭氧层造成破坏的风险,因此可用作HCFC-22的替代制冷剂。

    Absorbent refrigerant composition
    7.
    发明授权
    Absorbent refrigerant composition 失效
    吸收性制冷剂组成

    公开(公告)号:US06361710B1

    公开(公告)日:2002-03-26

    申请号:US08233468

    申请日:1994-04-26

    IPC分类号: C09K504

    摘要: An absorbent refrigerant composition containing an aqueous solution of zinc and lithium bromides with an added amount of hydroxide ions. The addition of the hydroxide ions lowers the corrosion rate of the composition to an acceptable level without raising the freeze point of the composition. The composition is particularly suitable for use as an absorbent refrigerant composition in the high temperature loop of a dual loop triple effect absorption refrigeration apparatus.

    摘要翻译: 含有添加量的氢氧根离子的锌和溴化锂水溶液的吸收性制冷剂组合物。 氢氧化物离子的添加​​将组合物的腐蚀速率降低到可接受的水平,而不会提高组合物的凝固点。 该组合物特别适合用作双环三效吸收式制冷装置的高温回路中的吸收性制冷剂组合物。