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Method for judging whether pressure conducting pipe of washing machine is bent or not and washing machine

A pressure guiding tube, washing machine technology, applied in the control device of washing machine, other washing machines, washing devices and other directions, can solve the problems of affecting the accuracy of water level sensing, inaccurate water level, overflow accident, etc., and achieves a simple and universal judgment method. Strong and accurate effect

Pending Publication Date: 2018-12-21
FOSHAN SHUNDE HAIER ELECTRIC APPLIANCES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The pressure guiding tube enters the box through the through hole and is easily squeezed by other components, causing bending and other abnormal phenomena, which affects the accuracy of water level sensing, resulting in inaccurate water level and even overflow accidents

Method used

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  • Method for judging whether pressure conducting pipe of washing machine is bent or not and washing machine
  • Method for judging whether pressure conducting pipe of washing machine is bent or not and washing machine
  • Method for judging whether pressure conducting pipe of washing machine is bent or not and washing machine

Examples

Experimental program
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Effect test

Embodiment 1

[0043] Such as Figure 1 to Figure 4 As shown, in the method for judging the bending of the pressure guide pipe of the washing machine described in the embodiment of the present invention, the water level sensor set on the washing machine is connected with the air chamber at the bottom of the tub through the pressure guide pipe, and the air chamber passes through the air chamber The water inlet is connected to the inside of the water tank. When the washing machine executes the water intake program and / or the drain program, the frequency value of the water level sensor is read and the rate of change of the frequency value is calculated. The calculated rate of change of the frequency value is lower than the corresponding rate of change Set the value to judge that there is an abnormal bend in the pressure guiding tube.

[0044] In the embodiment of the present invention, the washing machine includes a water level sensor, the water level sensor is connected to the water tank throu...

Embodiment 2

[0050] In this embodiment, the water level sensor converts the water level parameter of the measured point into a corresponding power signal in real time, and transmits the sensed water level signal to the control unit, and the control unit compares the measured water level signal with the set signal, The deviation is obtained, and then according to the nature of the deviation, a switch command is sent to the water inlet valve to ensure that the preset water level is reached in the water tank.

[0051] In this embodiment, the water level sensor is an LC circuit, which together with the circuit in the control unit forms an LC oscillating circuit, the inductance is changed by the size of the air pressure, thereby changing the frequency of the oscillating circuit, and the control unit reads the frequency , value, and judge the water level by the frequency value.

[0052] In this embodiment, the water level sensor includes a magnetic ring and a coil, forming an LC circuit; a diaph...

Embodiment 3

[0055] Such as Figures 1 to 2 As shown, a method for judging the bending of the pressure guiding pipe of a washing machine described in this embodiment, the washing machine includes a water level sensor, and the water level sensor is connected to the water tank through the pressure guiding pipe. , judge whether the pressure guiding tube is bent by the frequency value of the water level sensor.

[0056] In this embodiment, different frequency values ​​of the frequency sensor correspond to different water levels. During the drainage procedure, the frequency value of the water level sensor becomes larger; during the water intake procedure, the frequency value of the water level sensor decreases.

[0057] In this embodiment, the washing machine is provided with a minimum water level, the minimum water level is higher than the water inlet of the air chamber; when the water level of the washing water in the bucket is at the minimum water level, the frequency value of the water leve...

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Abstract

The invention discloses a method for judging whether a pressure conducting pipe of a washing machine is bent or not and the washing machine. A water level sensor arranged on the washing machine is communicated with an air chamber at the bottom of a water bucket through the pressure conducting pipe, the air chamber is communicated with the inside of the water bucket through an air chamber water inlet, and when the washing machine executes an water feeding procedure and / or a water discharging procedure, a frequency value of the water level sensor is read, the change rate of the frequency value is calculated, the calculated change rate of the frequency value is lower than a corresponding change rate setting value, and it is determined that the pressure conducting pipe is irregularly bent. Itcan be accurately judged whether the pressure conducting pipe is bent or not according to the change rate of the frequency value of the water level sensor, alarm information can be sent to a user in time, the water overflowing accident caused by irregular water inflow of the washing machine due to bending of the pressure conducting pipe is avoided, and the judging method is simple, easy to achieveand strong in universality.

Description

technical field [0001] The invention belongs to the technical field of washing machines, and in particular relates to a method for judging the bending of a pressure guiding pipe of a washing machine, and in particular to a washing machine applying the method. Background technique [0002] At present, all automatic washing machines are equipped with water level sensors to judge and determine the water level inside the washing machine. The accuracy and reliability of the water level sensor directly affect the water consumption and safety of the washing machine during the water intake process, and the pressure guiding tube is used as a pressure transmission part. Particularly important. Generally, the water level sensor is fixed on the control panel, and is connected with the air chamber provided on the outer bucket through the pressure guiding tube; the upper end of the pressure guiding tube is sealed with the air inlet nozzle of the water level sensor, and the lower end enter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06F33/02D06F39/08
CPCD06F39/081D06F39/087D06F33/00
Inventor 郇政杰于亮亮才智高秋英
Owner FOSHAN SHUNDE HAIER ELECTRIC APPLIANCES CO LTD