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热词
    • 4. 发明公开
    • HEAT PUMP SYSTEM
    • 热泵系统
    • EP2407735A1
    • 2012-01-18
    • EP10788220.1
    • 2010-04-30
    • Daikin Industries, Ltd.Daikin Europe N.V.
    • HONDA, MasahiroODA, Yoshinari
    • F25B1/00
    • F25B13/00F25B49/02F25B2313/006F25B2313/0314F25B2313/0315F25B2339/047F25B2600/021F25B2600/0271F25B2600/2509F25B2600/2513F25B2700/1931F25B2700/1933F25B2700/21151F25B2700/21152F25B2700/21161F25B2700/21162F25B2700/21174F25B2700/21175Y02B30/741
    • The heat pump system (1) has a bypass circuit (30) for forming a connection to the intake side of a compressor (21) from the portion of a main refrigerant circuit (20) that extends from the outlet of a usage-side heat exchanger (41) to a heat-source-side expansion valve (28), the main refrigerant circuit (20) being formed by connecting a variable-capacity compressor (21), a usage-side heat exchanger (41), a variable-type heat-source-side expansion valve (28), and a heat-source-side heat exchanger (26). The bypass circuit (30) has a bypass tube (31), and a bypass expansion valve (32) for depressurizing the liquid refrigerant flowing through the bypass tube (31). The bypass expansion valve (32) is a variable-type bypass expansion valve. A controller (1a) performs liquid injection control for controlling the bypass expansion valve (32) so that the discharge temperature (Td) of the compressor (21) is equal to a target discharge temperature (Tds); and determines the upper limit opening degree (OPix) of the bypass expansion valve (32) in liquid injection control by a correlation value with respect to the opening degree (one) of the heat-source-side expansion valve (28).
    • 热泵系统(1)具有用于从主制冷剂回路(20)的从使用侧热量的出口延伸的部分形成到压缩机(21)的吸入侧的连接的旁通回路(30) (21),利用侧热交换器(41),可变容量热交换器(41)和热交换器(41)连接而成的主制冷剂回路(20) (28),热源侧热交换器(26)。 旁通回路30具有旁通管31和使流经旁通管31的液体制冷剂减压的旁通膨胀阀32。 旁通膨胀阀32是可变式旁通膨胀阀。 控制器(1a)执行用于控制旁通膨胀阀(32)的液体喷射控制,使得压缩机(21)的喷出温度(Td)等于目标喷出温度(Tds)。 通过相对于热源侧膨胀阀28的开度(1)的相关值来决定液体喷射控制中的旁通膨胀阀32的上限开度(OPix)。