Mobile Toilet Circuit Diagram Explanation
The circuits of mobile toilets mainly involve the power supply architecture, the power supply for the occupancy indicator signs, and the automatic flushing controller circuit. Here is a detailed explanation:
Smart Public Toilet Power Supply Architecture: The core of the circuit in a mobile public toilet is the controller. After connecting to a 220V AC power source, it converts the alternating current to direct current through an AC-DC module, with common output voltages of 12V or 24V. This direct current supplies power to various devices within the public toilet, including occupancy indicator signs, ceiling speakers, exhaust fans, toilet stall occupancy sensors, lighting fixtures, and smart locks for partition doors. These devices are connected to the controller via IO signals, enabling centralized control and management, ensuring the orderly operation of all functions in the public toilet.
Occupancy Indicator Sign Circuit: The occupancy indicator sign is an important information display device in mobile toilets. It employs high-brightness LED display technology, ensuring clear visibility even in strong light conditions. Its power supply comes directly from the aforementioned DC power conversion module. With a stable DC power supply, the indicator sign can continuously and accurately display the usage status of toilet stalls, providing convenience for users.
Automatic Flushing Controller Circuit: The automatic flushing controller is a key component for achieving automatic cleaning in mobile toilets. Its circuit design includes a 12V power supply circuit, composed of components such as transformer T, VD1-VD4, VD5, and C1, which are responsible for stabilizing the input voltage at 12V to provide a stable power source for the subsequent control circuit. The control core uses an NE555 timer circuit, which, together with surrounding components, forms a pulse signal oscillator with an automatically adjustable duty cycle. This oscillator can control the water release time of the solenoid valve according to a preset program, achieving intelligent flushing with more frequent water releases during the day and longer intervals at night. Additionally, the circuit has a manual control function for water release to meet usage needs in special circumstances.
