Compact secondary water supply on-site sodium hypochlorite preparation device and control method thereof

The invention discloses a compact device for preparing sodium hypochlorite on a secondary water supply site and a control method thereof. An outlet of a softened water unit is connected with a salt dissolving unit and a first inlet of a saline water proportioning device; an outlet of the salt dissolving unit is connected with a second inlet of the saline water proportioning device; an electrolysisunit and a sodium hypochlorite storage unit are sequentially connected to the downstream of an outlet of the saline water proportioning device, an upper outlet of the sodium hypochlorite storage unitis connected with an inlet of a fan, a lower outlet of the sodium hypochlorite storage unit is output to a chlorination output port through a chlorination pump, and a hydrogen discharge port is formed in the top end of the sodium hypochlorite storage unit; the electrolysis unit is connected with the switching power supply; the whole device is provided with a control system. The device has the advantages of being highly in