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A method of automatically calibrating the water level of a washing machine

An automatic calibration, washing machine technology, applied in the field of washing machines, can solve the problems that do not involve water level calibration.

Active Publication Date: 2016-03-02
QINGDAO JIAONAN HAIER WASHING MACHINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The above patent application is mainly aimed at the detection method of water level, but does not involve the calibration of water level

Method used

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  • A method of automatically calibrating the water level of a washing machine

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In this embodiment, water level calibration includes the following steps:

[0036] (1) Set the standard water level frequency value F to 91.40KHz in the washing machine control system with a volume of 0.5 kg, and the water level frequency calibration range is 91.36KHz to 91.44KHz;

[0037](2) When the washing program is finished, within 1-2 seconds after the computer program controller of the washing machine displays 0, the washing machine is powered off first, and the water level frequency value F' at this time is read to determine whether F' is between 91.36KHz and 91.44 Within the KHz range; if yes, do not perform the water level automatic calibration procedure; if not, perform step 3;

[0038] (3) Calibrate the water level and set F' to 91.40KHz.

Embodiment 2

[0040] Compared with Example 1, the difference is only that: the step 2 is: after the power is turned on, before the washing process starts and before the water enters, read the water level frequency value F' at this time, and judge whether it is necessary to check the water level. calibration.

Embodiment 3

[0042] Compared with Embodiment 1, the only difference is that in Embodiment 1, the standard water level frequency value F is 91.40KHz, and the water level frequency calibration range is 91.34KHz-91.46KHz.

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Abstract

The invention discloses a method for automatically calibrating the water level of a washing machine, comprising the steps of: setting a normal water level frequency value F when a washing cylinder has no water and a water level frequency calibration range (F-b)-(F+b), wherein b is equal to 0.0003F-0.0005F; and when an inner cylinder is in a waterless state, judging whether the frequency value F' is in the water level frequency calibration range or not, if F' is out of the water level frequency calibration range, automatically calibrating the water level by a system to ensure that F' is the normal frequency value F so as to realize the automatic calibration of the water level. The method has the advantages of simpleness, science and high accuracy and is particularly suitable for small-volume washing machines having higher water level requirements.

Description

technical field [0001] The invention relates to the field of washing machines, in particular to a method for automatically calibrating the water level of the washing machine. Background technique [0002] The existing method for measuring the water level of the washing machine mainly uses a water level sensor to convert the pressure signal into a frequency signal to realize the control of the water level. For example, the Chinese invention patent "drum type washing machine with water level detection unit" whose patent application number is 200410059262.1 discloses a water level detection unit of a drum type washing machine, which includes a water level sensing hose connected to the pump of the washing machine drain pump. The suction pipe part is to communicate with the water storage cylinder, and also includes a water level detector, which is installed on the upper end of the water level sensing hose for detecting the air pressure in the water level sensing hose and the wate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D06F39/08
Inventor 许升皮晓杰刘杰汤金武
Owner QINGDAO JIAONAN HAIER WASHING MACHINE