| 摘要 |
PURPOSE:To automatically regulate a degree of residual chlorine content, by detecting the residual chlorine content in water of a tap water pressure device and, when it is below the specified value, injecting the chlorine into a system passage. CONSTITUTION:A control unit 11, which receives an output signal out of a residual chlorine sensor 10 detecting a degree of residual chlorine content in water inside a water receiving tank 3 and emits its output signal at a time when the residual chlorine content is below the specified value, and a chlorine injection pump 14 both are installed. Therefore, chlorine in a chlorine tank 16 is injected inside the water receiving tank 3 by the sensor 10 via an injection pipe 17. Accordingly, the chlorine is automatically injectable without asking for man power and, what is more, the residual chlorine content is automatically controllable to a proper quantity.
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