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    • 48. 发明公开
    • REFRIGERATING DEVICE
    • 制冷装置
    • EP1225400A1
    • 2002-07-24
    • EP00966426.9
    • 2000-10-12
    • Daikin Industries, Ltd.
    • TAIRA, S. Shiga-Seisakusho of Daikin Ind. Ltd.TANAKA, J. Shiga-Seisakusho of Daikin Ind., Ltd.SHIBAIKE, K. Shiga-Seisakusho of Daikin Ind., Ltd.
    • F25B1/00
    • F25B9/002F25B9/006F25B13/00F25B2341/0653F25B2400/12F25B2400/13F25B2600/2509F25B2700/21152F25B2700/21163F25B2700/21175Y02B30/72
    • A refrigerating device has a refrigerant circuit having a compressor (1), an indoor heat exchanger (3), a main motor operated valve (EV1), and an indoor heat exchanger (5) connected in a loop, and uses, as a working medium, an R32 refrigerant or a mixed refrigerant containing R32 at at least 70 wt%. A supercooling heat exchanger (11) is disposed between the indoor heat exchanger (3) and the main motor operated valve (EV1), and the liquid side of the refrigerant circuit are connected to the gas side by by-pass pipes (33, 34) through the supercooling heat exchanger (11). A supercooling motor operated valve (EV2) is disposed at the by-pass pipe (33) upstream of the supercooling heat exchanger (11). A discharge temperature detected by a discharge temperature sensor (21) is determined by a discharge temperature determination part (10b), and based on the determination result, the opening of the supercooling motor operated valve (EV2) is controlled so as to control an amount of the refrigerant flowing through the by-pass pipes (33, 34), whereby, using the working medium containing R32, the discharge temperature of the compressor is optimized without reducing the efficiency, and the COP and reliability are improved.
    • 制冷装置具有制冷剂回路,该制冷剂回路具有连接成环状的压缩机(1),室内热交换器(3),主电动阀(EV1),室内热交换器(5) 介质,R32制冷剂或含有至少70重量%的R32的混合制冷剂。 在室内热交换器(3)与主电动阀(EV1)之间配置过冷却热交换器(11),制冷剂回路的液体侧通过旁通配管(33,34)与气体侧连接 )通过过冷热交换器(11)。 过冷却用电动阀(EV2)配置在过冷却用热交换器(11)的上游侧的旁通配管(33)上。 由排出温度传感器(21)检测的排出温度由排出温度判定部(10b)判定,基于该判定结果,控制过冷却用电动阀(EV2)的开度, 的流经旁路管道33,34的制冷剂流动,由此,利用包含R32的工作介质,压缩机的排放温度被优化而不降低效率,并且COP和可靠性得到改善。