Household appliance for drying laundry items and method for determining a measurement variable correlated to a level of dryness

A technology for household appliances and laundry, which is applied to household clothes dryers, washing devices, household appliances, etc., can solve the problems such as the inability to quickly determine the dryness of the laundry and the instantaneous dryness.

Active Publication Date: 2015-01-21
BOSCH SIEMENS HAUSGERATE GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is impossible to quickly determine the dryness of the laundry or determine the instantaneous dryness at that time.

Method used

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  • Household appliance for drying laundry items and method for determining a measurement variable correlated to a level of dryness
  • Household appliance for drying laundry items and method for determining a measurement variable correlated to a level of dryness

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0041] In the example, figure 1 The domestic appliance 1 shown in is a laundry dryer. The domestic appliance 1 comprises a washing drum 2 in which laundry 3 is accommodated. The laundry 3 is dried in the domestic appliance 1 . The washing drum 2 can, for example, be mounted horizontally in the domestic appliance 1 , ie it can rotate about a horizontal axis of rotation. The washing drum 2 can be electrically coupled with the safety lead PE.

[0042] The washing 3 has an ohmic resistance which is at figure 1 is schematically symbolized by element 4 . That is, the laundry resistance 4 is not a component of the circuit, but a resistance of the laundry 3 . Wet laundry 3 has a small electrical resistance 4 and there is a relationship that the drier the laundry 3 is, the greater the electrical resistance 4 of the laundry is. The laundry resistance 4 is inversely proportional to the conductivity value of the laundry 3 .

[0043] It is now of interest to determine the laundry re...

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PUM

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Abstract

The invention relates to a household appliance 1 for drying laundry items 3, wherein the momentary level of dryness of the laundry items 3 is to be particularly reliably determined. A measuring device 5 is provided in the household appliance 1 for determining a measurement variable 4, Uw, correlated to the level of dryness of the laundry items 3. The measuring device 5 comprises two measurement electrodes 6, 7 spaced apart from each other and a circuit configuration 8 coupled to the measurement electrodes 6, 7, bringing about a current flow I through the measurement electrodes 6, 7, capturing an electrical laundry voltage drop Uw between the measurement electrodes 6, 7, and deriving the measurement variable 4, Uw, as a function thereof. A direction of the current flow I through the measurement electrodes 6, 7 is changed repeatedly. Galvanic effects at the measurement electrodes 6, 7 are thus prevented.

Description

technical field [0001] The invention relates to a household appliance for drying laundry. The domestic appliance comprises a measuring device for determining a measured variable which is relevant to the dryness of the laundry. The measuring device comprises two measuring electrodes arranged at a distance from one another, which are arranged in the domestic appliance in such a way that the measuring electrodes contact the laundry to be dried during operation of the domestic appliance. The measuring device also includes a circuit arrangement coupled to the measuring electrodes. The circuit arrangement can induce a current flow through the measuring electrodes, sense the laundry voltage falling between the measuring electrodes and derive a measured variable from the detected laundry voltage. The invention also relates to a method for determining a measured variable related to the dryness of laundry in a domestic appliance by means of a measuring device in which the laundry is d...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06F58/28D06F34/08D06F34/18D06F58/38
CPCD06F58/28D06F2058/2838D06F58/38D06F2103/10D06F34/18D06F2103/44D06F34/08
Inventor C·亨勒H·瓦尔德K·扎鲁巴
Owner BOSCH SIEMENS HAUSGERATE GMBH
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