Household water level controller

Abstract

The invention discloses a household water level controller. A circuit is led out from the positive electrode of the grounding diode to be connected with a point A at the upper limit water level of thewater tank, and another circuit is led out from the positive electrode of the grounding diode to be connected with a point B at the lower limit water level of the water tank after being connected with a normally open contact of the relay in series. The freewheeling tube is connected in parallel with the relay coil. The alternating-current power supply is connected with a relay normally-closed contact in series and then connected with the water pump motor. The voltage to ground of the negative electrode of the half-wave rectification block is equal to-0.45 U of the AC voltage U, and the potential of water conducted with the ground is equal to the zero potential of the ground. And the water has a 0.45 U potential difference for the negative electrode of the half-wave rectification block. When the water level rises to an upper limit point A, current is generated between water and the negative electrode of the half-wave rectification block, a relay coil is powered on, a relay is closed, anormally-closed contact is disconnected, and the water pump stops feeding water. When the water level drops below the lower limit point B, no current exists between water and the rectifier bridge cathode, the relay is released, the normally-closed contact is closed, and the water pump supplies water.

Description

technical field [0001] The invention belongs to the field of electrical appliances. Background technique [0002] The current technology that uses floating magnets to trigger the closing (or separation) of the reed switch contacts to control the water level, because the current capacity that the reed switch contacts can control is small, it must be equipped with an amplifying power system. [0003] Its bigger defect is lack of universality, and its upper and lower water level difference is fixed, and the water tank of different height must select the controller of different specifications for use. Contents of the invention [0004] The structure of the household water level controller of the present invention is: the DC negative pole of the output pole of the AC power supply through the half-wave rectifier block (1) is sequentially connected in series with a relay coil (2), a fuse (4), a grounding two connecting pipe (5) negative pole, and a grounding two The end point of...

AI Technical Summary

Problems solved by technology

[0003] Its biggest defect lies in the lack of versatility. The difference between the upper and lower water levels is fixed, and the controllers of different specifications must be selected for water tanks of different heights.

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