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1. 发明授权

US4901534A Defrosting control of air-conditioning apparatus 失效
标题翻译：空调机除霜控制
公开(公告)号：US4901534A
公开(公告)日：1990-02-20
申请号：US137026
申请日：1987-12-23
申请人： Eiji Nakatsuno , Yasunori Himeno , Koji Murozono
发明人： Eiji Nakatsuno , Yasunori Himeno , Koji Murozono
IPC分类号： F25B47/02
CPC分类号： F25B47/022
摘要： A method for controlling an air-conditioning apparatus in terms of execution of the defrosting mode. The apparatus basically includes a variable-frequency compressor, a room heat-exchanger for performing heat-exchange with a room fan, and an outdoor heat-exchanger provided at the outside of the room, which are circularly coupled to each other to establish a refrigerating cycle. Also included in the air conditioning apparatus are a bypass circuit provided between a first line for effecting a connection between an outlet side of the compressor and the room heat-exchanger and a second line for effecting a connection between an inlet side of the compressor and the outdoor heat-exchanger and a restriction device arranged to allow a change of its restriction amount and provided between the two heat-exchanger. The bypass circuit has an opening and closing valve for shutting off the bypass circuit. In response to start of a defrosting mode for defrosting the outdoor heat-exchanger, the restriction amount of the restriction device is controlled so as to be reduced as compared with that on the heating mode, the opening and closing valve is opened for establishing communication between the first and second lines, and further the compressor is controlled so that its operating frequency is increased stepwise up to a predetermined value desirable for the defrosting mode.
摘要翻译：根据除霜模式的执行来控制空调装置的方法。该装置基本上包括可变频率压缩机，与房间风扇进行热交换的室内热交换器和设置在室外的室外热交换器，它们彼此循环联接以建立冷藏周期。还包括在空调装置中的旁通回路，设置在用于实现压缩机的出口侧和室内热交换器之间的连接的第一管线和用于实现压缩机的入口侧与第二管路之间的连接的第二管路室外热交换器和限制装置，其布置成允许其限制量的改变并且设置在两个热交换器之间。旁通回路具有用于切断旁通回路的开关阀。响应于开始除霜室外热交换器的除霜模式，限制装置的限制量被控制为与加热模式相比被减小，打开和关闭阀门以建立在室外热交换器之间的连通第一和第二线路，此外，压缩机被控制，使得其工作频率逐步增加到除霜模式所需的预定值。

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