Water level sensing device and washing machine
A technology of water level sensing and power supply device, which is applied in other washing machines, washing devices, textiles and paper making, etc., can solve the problems of power waste, poor use experience, shorten the use time of power supply devices, etc. The effect of using time
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Embodiment 1
[0059] like Image 6 and Figure 7 As shown, this embodiment provides a water level sensing device 3, including: a housing 31 having a water pressure chamber 310 communicating with the outside world; the water level sensing device 3 includes a water level detection part and a switch control part, wherein: The water level detection part includes an electromagnetic coil 32 installed on the casing 31 and a magnetic core 33 that can move up and down with the change of the pressure in the water pressure chamber 310. The magnetic core 33 is an iron core; 310 The position of the magnetic core 33 moving together changes in the frequency of the resonant circuit to detect the water level. This detection method detects the water level with simple structure and accurate detection results.
[0060] The switch control part includes a magnetic switch 34 arranged in the housing 31 to conduct or cut off the power circuit between the water level sensing device 3 and the power supply device 2, ...
Embodiment 2
[0081] like Figure 1 to Figure 7 As shown, this embodiment provides a washing machine with the water level sensing device 3 described in the first embodiment above. The washing machine includes an outer tub and an inner tub 1 arranged in the outer tub. The water level sensing device 3 is installed in the outer tub. On the inner tub 1 of the washing machine, the water pressure chamber 310 of the water level sensing device 3 communicates with the interior of the inner tub 1 .
[0082] Preferably, in order to improve detection accuracy, the water level sensing device 3 is installed in the inner tub 1 of the washing machine, but is not limited thereto, the water level sensing device 3 may also be installed outside the inner tub 1 . The inner tub 1 includes an inner tub body 111 and an inner tub bottom 112 , and the water level sensing device 3 can be installed at any position inside the inner tub bottom 112 or the inner tub body 111 .
[0083] Preferably, as Figure 1 to Figure...
Embodiment 3
[0110] like Figure 1 to Figure 8 As shown, this embodiment also provides a control method having the above washing machine, the control method includes: the control unit of the washing machine can charge the power supply device 2 by controlling the rotation of the inner tub 1, and can control the power supply device 2 to charge the inner tub The electrical components on 1 are powered.
[0111] When the control unit determines that the actual water intake water level of the washing machine has reached the set initial water intake water level, or that the actual water intake time of the washing machine has reached the set initial water intake time tinit, it controls the power supply device 2 to communicate with the water level sensor. The devices 3 are energized to start supplying power to the water level sensing device 3. The water level sensing device 3 begins to detect the water level information in the inner tub 1 and feed it back to the control unit. When the control unit ...
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