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    • 10. 发明申请
    • HEAT PUMP APPARATUS
    • 热泵装置
    • US20120111042A1
    • 2012-05-10
    • US13384680
    • 2010-01-15
    • Mamoru HamadaFumitake UnezakiYoshihiro TakahashiKengo TakahashiKazuki OkadaHirokazu MinamisakoShinichi Uchino
    • Mamoru HamadaFumitake UnezakiYoshihiro TakahashiKengo TakahashiKazuki OkadaHirokazu MinamisakoShinichi Uchino
    • F25B49/00
    • F25B47/025F24F11/41F25B13/00F25B49/02F25B2400/0411F25B2600/01F25B2600/021F25B2600/2501F25B2600/2513F25B2600/2521F25B2700/21151F25B2700/21163Y02B30/741
    • In a heat pump apparatus, it is aimed to enhance efficiency of a defrost operation by reducing a loss of heat radiation during the defrost operation and reducing a compressor input during the defrost operation. The heat pump apparatus includes a main refrigerant circuit in which a compressor, a first heat exchanger, an expansion mechanism, and a second heat exchanger are connected sequentially, and also includes a bypass circuit including an on-off valve and providing a connection by bypassing the expansion mechanism. The main refrigerant circuit includes a four-way valve that switches between a heating operation and the defrost operation by switching an order in which the refrigerant circulates through the main refrigerant circuit. The main refrigerant circuit also includes a first temperature detection unit and a second temperature detection unit. Based on values detected by these temperature detection units, a degree of superheat of the first heat exchanger during the defrost operation is computed. When the heating operation is switched to the defrost operation, the heat pump apparatus increases a circulation amount of the refrigerant circulating through the refrigerant circuit by opening the on-off valve, and also controls an operation frequency of the compressor such that the degree of superheat is at a predetermined target value.
    • 在热泵装置中,旨在通过减少除霜操作期间的热辐射损失来提高除霜操作的效率,并且在除霜操作期间减少压缩机输入。 热泵装置包括:主制冷剂回路,其中压缩机,第一热交换器,膨胀机构和第二热交换器依次连接,并且还包括旁通回路,旁路回路包括开关阀,并通过旁路提供连接 扩张机制。 主制冷剂回路包括四通阀,其通过切换制冷剂通过主制冷剂回路循环的顺序而在加热操作和除霜操作之间切换。 主制冷剂回路还包括第一温度检测单元和第二温度检测单元。 基于这些温度检测单元检测出的值,算出除霜运转时的第一热交换器的过热度。 当加热操作切换到除霜操作时,热泵装置通过打开开关阀来增加通过制冷剂回路循环的制冷剂的循环量,并且还控制压缩机的操作频率使得过热度 处于预定的目标值。