Method for the improved control of a water-conducting domestic appliance, and domestic appliance which is suitable for carrying out the method

Abstract

The invention relates to a method for operating a water-conducting domestic appliance comprising a drum 3 for receiving objects 22, 34 to be treated, said drum having at least one perimeter with at least one radiation passage 30, 35; a controller 18; and a spectrometer 21, which comprises at least one radiation source 5, 27, at least one radiation detector 7, 28, and a microcomputer 6. The microcomputer 6 and the controller 18 are designed to exchange information between each other such that data can be exchanged between the spectrometer 21 and the controller 18. The invention is characterizedby the following steps: (a) rotating the drum 3 at a specified rotational speed Dz, wherein a frequency f, which is based on the number of rotation cycles of radiation passages 30, 35 per unit of time, is defined as the product of the rotational speed Dz multiplied by the number of radiation passages 30, 35; (b) continuously ascertaining radiation 31 from the at least one radiation source 5, 27 of the spectrometer 21 in a wavelength range lambda1 to lambda2 through the at least one radiation passage 30, 35 of the rotating drum 3 such that a radiation 3 which is periodically interrupted at thefrequency f is produced in the drum interior and the objects 22, 34 in the rotating drum 3 are supplied with the radiation 31 periodically interrupted at the frequency f, wherein the at least one radiation detector 7, 28 is arranged such that the radiation 32 reflected by the objects 22, 34 is registered directly as a measurement signal without passing through the radiation passage 30, 35, and thus without being interrupted by the radiation passage 30, 35 at the frequency f, and a periodic function, which depends solely on the domestic appliance 1, with the period length 1/f, in particular asine or rectangular function, is generated as a reference signal by the controller 18; (c) transmitting the measurement signal and the reference signal to the microcomputer 6, analyzing the measurement signal and the comparison thereof with the reference signal using an analysis routine stored in the microcomputer 6, and transmitting the analyzed measurement signal to the controller 18; and (d) selecting and/or adapting an operating program by means of the controller 18 with respect to the analyzed measurement signal, wherein steps (b) to (d) are carried out once or multiple times. The invention further relates to a domestic appliance which is suitable for carrying out the method.

Description

technical field [0001] The invention relates to a method for operating a water-conducting domestic appliance with a drum for receiving objects to be treated, said drum having at least one circumference with at least one radiation channel; a control device; a spectrometer comprising at least one radiation source, at least one radiation detector and a microcomputer, wherein the microcomputer and the control device are arranged to exchange information with each other, so that data can be exchanged between the spectrometer and the control device. The invention also relates to a water-conducting household appliance suitable for carrying out the method. Background technique [0002] Typically, detergents and cleaners are used to clean items in water-conducting household appliances. These detergents and cleaners often have a complex composition, since enzymes, bleaches, water softeners, etc. are often included in addition to washing active substances (so-called surfactants). Surf...

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Problems solved by technology

[0007] On the other hand, household appliances that operate with volatile chemicals such as propane g

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