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    • 4. 发明授权
    • Hot gas bypass defrosting system
    • 热气旁路除霜系统
    • US5065584A
    • 1991-11-19
    • US559484
    • 1990-07-30
    • Dean G. ByczynskiWilliam A. Reed
    • Dean G. ByczynskiWilliam A. Reed
    • F25B47/02F25D21/00
    • F25D21/008F25B47/022
    • A refrigeration system including a compressor, condenser, capillary tube and evaporator includes a hot gas bypass defrosting capability provided by a bypass means around the capillary tube. Defrosting is achieved by the use of hot, uncondensed refrigerant, without requiring a reversal of the flow of refrigerant through the system. An exemplary bypass means includes a solenoid valve and associated tubing to form an alternate, low restriction path for the refrigerant to bypass the capillary tube. When the solenoid valve is closed, refrigerant is forced through the capillary tube for normal refrigeration. However, when the solenoid valve is open, condensation of refrigerant in the condenser is inhibited, and hot refrigerant gas is delivered directly to the evaporator for defrosting. The solenoid valve is controlled in response to the total accumulated running time of the compressor for improved control of the defrosting cycles.
    • 包括压缩机,冷凝器,毛细管和蒸发器的制冷系统包括由毛细管周围的旁路装置提供的热气旁路除霜能力。 除霜是通过使用热的未冷凝的制冷剂来实现的,而不需要通过系统逆转制冷剂的流动。 示例性的旁路装置包括电磁阀和相关联的管道,以形成用于制冷剂绕过毛细管的交替的低限制路径。 当电磁阀关闭时,制冷剂被迫通过毛细管进行正常制冷。 然而,当电磁阀打开时,制冷剂在冷凝器中的冷凝被抑制,并且热的制冷剂气体被直接输送到蒸发器以进行除霜。 响应于压缩机的总累计运行时间控制电磁阀,以改善除霜循环的控制。