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1. 发明授权

US5379608A Defrosting control unit for showcases 失效
标题翻译：用于展示柜的除霜控制单元
公开(公告)号：US5379608A
公开(公告)日：1995-01-10
申请号：US35151
申请日：1993-03-22
申请人： Keiichi Ishimaru , Osamu Itoh , Tomoyoshi Nakatani , Haruhiko Sudo , Masaya Kurita
发明人： Keiichi Ishimaru , Osamu Itoh , Tomoyoshi Nakatani , Haruhiko Sudo , Masaya Kurita
IPC分类号： A47F3/04 , F25D21/00 , F25D21/06
CPC分类号： F25D21/006 , A47F3/0478 , F25B2700/21173
摘要： A defrosting control unit for providing centralized control of the defrosting a showcase having showcase units with defrosting devices includes an environmental informer ion signal generation portion and a defrosting control portion. The signal generation portion generates a signal reflecting at least one environmental parameter such as whether it is daytime or nighttime, the difference in air temperature measured at different places in a showcase unit, the deviation of the temperature difference with respect to a steady-state value, and the temporal variation of the deviation. The defrosting control portion receives the environmental information signal from the signal generation portion and sends a defrosting start signal and a defrosting end signal to the defrosting devices at a time interval . The signal generation portion may include a fuzzy reasoning portion, membership functions, and rules so that an inference on the optimal time for starting a defrosting operation can be made. The optimal time for starting a defrosting may also be obtained by a defrosting timer and a day/night judgment portion. A centralized showcase defrosting system includes such a defrosting centre unit in addition to a showcase unit having an inner duct, an evaporator and a defrosting device attached to the evaporator, the defrosting device having a heater for melting frost which has been deposited on the surface of the evaporator.
摘要翻译：一种除霜控制单元，用于对具有除霜装置的陈列柜单元进行除霜的陈列柜的集中控制包括环境报告器离子信号产生部分和除霜控制部分。信号生成部生成反映至少一个环境参数的信号，例如是白天还是夜间，在橱窗单元中的不同地方测量的空气温度差，温度差相对于稳态值的偏差，以及偏差的时间变化。除霜控制部从信号生成部接收环境信息信号，并以解除时间间隔向除霜装置发送除霜开始信号和除霜结束信号。信号产生部分可以包括模糊推理部分，隶属函数和规则，使得可以进行用于开始除霜操作的最佳时间的推断。除霜定时器和白天/夜间判断部分也可以获得开始除霜的最佳时间。集中展示除霜系统除了具有内管，蒸发器和附接到蒸发器的除霜装置的展示单元之外，还包括除霜中心单元，除霜装置具有用于熔化霜的加热器，该加热器已经沉积在蒸发器。

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