The invention provides a power supply
control circuit for preparing a
disinfectant through direct-current
electrolysis in a slightly alkaline environment. The power supply
control circuit comprises alow-
voltage direct-current power supply and an
electrode plate array connected with the low-
voltage direct-current power supply; the low-
voltage direct-current power supply supplies power to the
electrode plate array; the output voltage of the low-voltage direct-current power supply is 1V-24V; the
electrode plate array is composed of a net-shaped
anode and a net-shaped
cathode which are closely arranged in parallel; the distance between the net-shaped
anode and the net-shaped
cathode ranges from 0.5 mm to 2.5 mm; brine between the
anode and the
cathode can freely flow so that the pH value range of the liquid environment in the
electrolysis process can be maintained to be 8 and 10. When
saline water is electrolyzed, the low-voltage direct-current power supply detects current output by the electrode plate array; when the liquid level of the
saline water descends, and the area, exposed from the liquid level, of the electrode plate array is larger than a threshold value, the variable quantity of the current output by the electrode plate array is larger than the threshold value, and the power supply
control circuit stops supplying power to the electrode plate array. According to the power supply control circuit, domestic
disinfectant fluid can be prepared by the diaphragm-free brine
electrolysis method, the problem of gas
deflagration of the diaphragm-free brine electrolysis methodis solved, and the product can be safely used for domestic
hygiene disinfection.