Washing machine

Abstract

The washing machine comprises a drain pipe (75) communicated with the bottom of an outer tub (43), a feculent degree detection part (92) arranged inside the drain pipe for detecting the feculent degree of water according to the light transmittance degree, a cleaning hose (72) for connecting a water inlet valve (70) with the drain pipe and a control part (87). The feculent degree of the water supplied inside the drainage pipe is detected by the feculent degree detection part and then a relatively lower value of the water turbidity at the initial stage of the cleaning process and the final rinsing process is adopted for the determination of the feculent degree of the rinsing liquid. Therefore, the accuracy of the detection for the feculent degree is improved and the whole process is shortened so as to realize the purpose of energy-saving.

Description

technical field [0001] The invention relates to a washing machine capable of controlling the washing and rinsing operations according to the dirtiness of the washing liquid. Background technique [0002] In existing washing machines, it is known to determine whether washing is completed by detecting the degree of turbidity of the washing liquid. For one example, refer to Japanese Patent Laid-Open Publication No. Sho 57-66793 (hereinafter referred to as Patent Document 1). [0003] In addition, there is another technique that readjusts the sensitivity of the turbidity detector when the washing machine is paused and then restarted after the turbidity is detected. For an example, refer to Japanese Laid-Open Publication No. 61- 159998 (hereinafter referred to as reference 2). [0004] Furthermore, there is another technology that prevents misjudgment of whether the change in turbidity of the washing water is caused by dirt detached from the clothes or suspended matter such as l...

AI Technical Summary

Problems solved by technology

That is, because the subsequent process is controlled based on the data obtained from the turbidity of the washing water during the washing process, neither the influence of the turbidity of the added tap water, nor the turbidity after long-term use is considered. The light-transmitting part of the sensor is gradually affected by scale and other pollution. Therefore, the accuracy of turbidity detection using a turbidity sensor is problematic.

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