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本文介绍用单向可控硅制作的水塔自动供水器,具有电路简单,元件易购的特点,造价不足十五元钱。由于采用电极通交流控制的方法降低了水对电板的腐蚀。故性能稳定可靠,使用已半年多,从未出现故障。工作原理:电路原理如图1。使用过程中水位下降至B′点以下时A、B、C断开,V1由饱和转为截止,V2导通,同时因A断电,V4截止使V3饱和导通,进而使T1触发导通、继电器J动作,常开触点闭合水泵开始工作。水位超过B′点时,B、C点接通,B点有交流电流通过经D1、D2、R1、C2整流向V1提控偏流。V1饱和
This article describes the use of unidirectional SCR water tower automatic water supply, with a simple circuit, features easy-to-buy components, cost less than fifteen dollars. Due to the adoption of electrode through AC control method reduces the corrosion of water on the board. Therefore, stable and reliable performance, the use of more than six months, never failed. Working principle: circuit principle as shown in Figure 1. When the water level drops below the point B ’, A, B and C are disconnected, V1 is turned from saturation to end, and V2 is turned on. At the same time, because A is powered off, V4 is turned off to saturate V3 and turn on T1, , Relay J action, normally open contact closed pump to work. When the water level exceeds the point B ’, B and C are connected, and the AC current at point B passes through D1, D2, R1 and C2 to rectify and control the bias current to V1. V1 is saturated