Water level sensor for washing machine

Abstract

The invention relates to a washing machine water level device with the following structure: the fluid enters and exits the air space with the increase and decrease of the water level; the hose supplies the fluid to the air space; The fluid pressure of the hose; the upper box is detachably combined on the upper side of the lower box, and the central part of the upper box is provided with a hollow circular spool; the partition can move up and down with the increase or decrease of the fluid pressure, and is set at Above the lower box; the iron core can move down with the movement of the partition; the coil is wound on the outer peripheral surface of the bobbin. The present invention can bring the following effects: the water level sensing device determines the water level of the washing water, and its output frequency characteristic is determined by the inductance of the bobbin coil. Through the stable inductance, the desired frequency characteristics can be obtained only by combining with a capacitor with a certain capacity, thus avoiding the combination of multiple capacitors, simplifying the working process and improving production efficiency; in addition, the water level sensing sensor structure becomes simple.

Description

technical field [0001] The invention relates to a washing machine, in particular to a water level sensor for sensing the washing machine by sensing the water level supplied in the washing tank so that the water supply and drainage work of each washing process can be carried out smoothly. Background technique [0002] Devices such as general automatic washing machines are all provided with water level sensing devices. The above-mentioned water level sensing device outputs the automatically sensed water level to the control device, so that the control device can control water supply and drainage. The above-mentioned water level sensing device can open the water supply valve according to the amount of washing objects in the washing tank to supply water into the washing tank; as the water level of the above-mentioned water supply rises, the air pressure will also rise, so the above-mentioned water level sensing device cuts off the water supply valve to interrupt the water supply...

AI Technical Summary

Problems solved by technology

[0011] However, in the winding structure of the coil 60 in the prior art, when the coil 60 wound on the above-mentioned bobbin 50 is wound (winding) operation, the alignment of the above-mentioned coil 60 often occurs. Occurs (see Figure 2b ), will cause the output frequency characteristics to change with the change of the inductance L value

If you want to obtain the corresponding frequency characteristics, you need to combine multiple capacitors with different capacities, which eventually leads to the problem of low production efficiency.

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