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    • 17. 发明公开
    • Air conditioner
    • 冷气机
    • EP2728279A1
    • 2014-05-07
    • EP13191783.3
    • 2013-11-06
    • Hitachi Appliances, Inc.
    • Yokozeki, AtsuhikoNakayama, SusumuTsuboe, Hiroaki
    • F25B9/00F25B31/00F25B43/00
    • F25B9/002F25B9/006F25B31/004F25B43/006F25B2400/12F25B2500/16
    • The separation between a liquid refrigerant and a lubricant inside an accumulator is prevented, and the amount of the lubricant supplied to a compressor is ensured. As a refrigerant, a refrigerant made of only R32 or a mixed refrigerant containing predetermined mass percent or more of the R32 is used. The refrigerant mixed with a predetermined level or more of the lubricant to prevent the occurrence of the two-layer separation between the liquid refrigerant and the lubricant is supplied to a compressor (104) of an outdoor unit (100). The lubricant separated by an oil separator (106) is returned to the accumulator (105) by an oil return capillary (107) to prevent the occurrence of a two-layer separation area in the accumulator. By the supply of a gas refrigerant containing an appropriate amount of the liquid refrigerant from the accumulator (105) to the compressor (104), the lubricant can be supplied to the compressor (104).
    • 防止液体制冷剂与储液器内的润滑剂分离,并确保供应给压缩机的润滑剂的量。 作为制冷剂,使用仅由R32构成的制冷剂或含有R32的规定质量百分比以上的混合制冷剂。 与预定水平或更多的润滑剂混合以防止液体制冷剂和润滑剂之间出现两层分离的制冷剂被供应到室外单元(100)的压缩机(104)。 由油分离器(106)分离的润滑油通过回油毛细管(107)返回到储液器(105),以防止在储液器中出现两层分离区域。 通过从蓄压器105向压缩机104供给含有适量的液体制冷剂的气体制冷剂,能够向压缩机104供给润滑油。
    • 20. 发明公开
    • AIR CONDITIONING APPARATUS
    • KLIMAANLAGE
    • EP2554926A4
    • 2013-12-18
    • EP10848817
    • 2010-03-29
    • MITSUBISHI ELECTRIC CORP
    • SHIMAZU YUSUKETAKAYAMA KEISUKEHATOMURA TAKESHI
    • F25B1/00F25B9/00F25B31/00F25B43/02
    • F25B31/004F25B9/008F25B2309/061F25B2500/16F25B2600/0253F25B2600/2513F25B2600/2519Y02B30/741
    • In an air-conditioning apparatus that uses a refrigerant, which operates in a transcritical cycle, and refrigerating machine oil, which has low miscibility with the refrigerant, in a refrigerant circuit for a refrigeration cycle connected to a compressor, a radiator, an expansion mechanism, and an evaporator, the air-conditioning apparatus includes a flow regulating mechanism provided in the refrigerant circuit, and flow control means that controls the flow regulating mechanism. If a refrigerant flow velocity at an outlet side of the radiator is lower than a predetermined threshold value, the refrigerant flow velocity at the outlet side of the radiator is increased by the flow control means so that oil-return operation that returns the refrigerating machine oil discharged from the compressor to the compressor is performed for at least a predetermined time period.
    • 在与压缩机连接的制冷循环的制冷剂回路中,使用以跨临界循环动作的制冷剂和与制冷剂的混合性低的制冷机油的空气调节装置,散热器,膨胀机构 和蒸发器,所述空气调节装置包括设置在制冷剂回路中的流量调节机构和控制流量调节机构的流量控制装置。 如果散热器出口侧的制冷剂流速低于预定的阈值,则通过流量控制装置增大散热器出口侧的制冷剂流速,从而返回制冷机油的回油操作 从压缩机排出到压缩机的过程至少执行预定的时间段。