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    • 101. 发明授权
    • Defrost cycle initiation system
    • DEFROST循环启动系统
    • US3845637A
    • 1974-11-05
    • US39494773
    • 1973-09-06
    • TEXAS INSTRUMENTS INC
    • SHEPHERD G
    • F25D17/06F25D21/00F25D21/02F25D21/06
    • F25D17/065F25D21/002F25D21/02F25D2317/067F25D2400/04
    • A defrost cycle initiation system for refrigeration apparatus (e.g., a refrigerator, a refrigerator-freezer, or a room air conditioner) in which operation of the defrost system is initiated by frost build-up on the refrigeration apparatus. Generally, the refrigeration apparatus has cooling means for absorbing heat from a refrigerated zone, this cooling means being subject to the build-up of frost. The refrigeration apparatus has a main flow path for the intake of air from the refrigerated zone and for passage of the air over the cooling means to chill the air, and for discharge of the chilled air into the refrigerated zone, and a blower for forcing air through the main flow path. The defrost cycle initiation system of this invention includes an auxiliary flow path providing communication between the main flow path and the refrigerated zone, air normally flowing in the auxiliary flow path from the refrigerated zone to the main flow path when the refrigeration apparatus is in its normal mode of operation. The system further includes means for sensing the temperature of air flowing through the auxiliary flow path. The sensing means initiates a defrost cycle upon sensing a predetermined initiation temperature of air. Means are also provided for effecting reversal of flow of air in the auxiliary flow path in response to build-up of frost on the cooling means thereby to direct air having a temperature less than the abovementioned predetermined initiation temperature through the auxiliary flow path to lower the temperature of the air sensed by the sensing means below the predetermined temperature and for reestablishing the flow of air in the auxiliary flow path from the refrigerated zone to the main flow path upon the clearing of the cooling means of frost.
    • 一种用于制冷装置(例如,冰箱,冰箱或冰箱或室内空调)的除霜循环启动系统,其中除霜系统的操作由制冷装置上的霜积聚开始。 通常,制冷装置具有用于从冷藏区吸收热量的冷却装置,该冷却装置受到霜的积聚。 制冷装置具有用于从冷藏区域吸入空气并使空气在冷却装置上通过的主流路,以冷却空气,并将冷空气排放到冷藏区域中,并且用于迫使空气 通过主流路。 本发明的除霜循环引发系统包括辅助流路,其在主流路和冷藏区之间连通,当制冷装置处于正常状态时,在从冷藏区到主流路的辅助流路中正常流动的空气 操作模式。 该系统还包括用于感测流过辅助流动路径的空气的温度的装置。 感测装置在感测到空气的预定起始温度时启动除霜循环。 还提供了用于响应于冷却装置上的霜的积聚而实现辅助流路中的空气流反转的装置,从而通过辅助流动路径将温度小于上述预定起始温度的空气引导到 将由感测装置感测的空气的温度降低到预定温度以下,并且在清除冷却装置之后重新建立从冷藏区到主流路的辅助流路中的空气流。