Device for determining the conductance of laundry, dryers and method for preventing deposits on electrodes
First Claim
1. A device for determining the conductance of laundry in a laundry dryer, which comprises:
- at least two electrodes, each fixed to a respective receiving area of the laundry dryer; and
means for heat reduction from at least a part of at least one of the electrodes, the means for heat reduction operating to reduce a temperature of the part of the at least one electrode below a temperature of the respective receiving area of the laundry dryer.
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Accused Products
Abstract
A device for determining the conductance of laundry in a drier. The device comprises at least two electrodes (2) and means for dissipating heat from at least one part of at least one of said electrodes (2). The invention further relates to a drier comprising at least one area (5) for receiving laundry and at least two electrodes (2) for measuring the conductance of the laundry, at least one of the electrodes (2) at least partly bordering said receiving area (5). Means for cooling at least one part of at least one of the electrodes (2) are also provided inside the drier. Also disclosed is a method for preventing the formation of layers on electrodes (2) used for measuring conductance in a drier.
525 Citations
25 Claims
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1. A device for determining the conductance of laundry in a laundry dryer, which comprises:
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at least two electrodes, each fixed to a respective receiving area of the laundry dryer; and means for heat reduction from at least a part of at least one of the electrodes, the means for heat reduction operating to reduce a temperature of the part of the at least one electrode below a temperature of the respective receiving area of the laundry dryer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A laundry dryer, comprising:
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an electrode of a moisture sensor fixed to a respective receiving area of the laundry dryer; and a cooler that cools the electrode, the cooler operating to reduce a temperature of the electrode below a temperature of the respective receiving area of the laundry dryer. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A laundry dryer, comprising:
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a laundry receiving area in which laundry to be dried is retained, laundry in the laundry receiving area being subjected to a drying operation whereby moisture initially retained by the laundry is released into surrounding air as the laundry is dried and the surrounding air increases in its moisture content; and a device for determining the conductance of laundry in the laundry receiving area, the device including a first electrode and an exposed side arrangement, the exposed side arrangement including a second electrode, the second electrode having an exposed side that is exposed to the laundry receiving area to an extent that the second electrode is contacted by a moist air mixture in the laundry receiving area, the device being operable to apply a voltage to the first electrode and the second electrode of the exposed side arrangement that results in a current passing through laundry retained in the laundry receiving area, thereby permitting a voltage measurement proportional to a moisture content of the laundry, the device applying a voltage in a manner such that the exposed side of the second electrode of the exposed side arrangement can reach an evaporation enabling temperature sufficient to evaporate liquid in the air mixture in contact with the exposed side in the absence of a heat abatement measure, and the exposed side arrangement operating to substantially prevent the exposed side of the second electrode from reaching the evaporation enabling temperature in spite of the application by the device of a voltage that would otherwise cause the exposed side of the second electrode to reach the evaporation enabling temperature.
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Specification