The JL series ultrasonic electronic switch is a smart and advanced control device designed for automatic operation in various applications. It consists of several key components, including a pulse generator, a cyclic distributor, an ultrasonic transmitter, an ultrasonic receiver, a frequency-selective amplifier, a detection circuit, and a driving and switching controller. By utilizing ultrasonic directional emission and delay receiving techniques, the switch can detect movement or presence within a specific area and trigger the corresponding control mechanism. This enables seamless on/off functionality without physical contact.
The system works by emitting a series of ultrasonic waves from the transmitter during a specific time interval (t0 to t1). The receiver then listens for the reflected signals during another time window (t2 to t3), allowing it to determine if there is any activity in the detection zone. These signals are processed through a frequency-selective amplifier, followed by detection and comparison stages, which ultimately activate the driving circuit. This circuit controls switching components such as solenoids, relays, or thyristors, enabling the system to manage devices like water valves, lights, or other automated equipment.
One of the main advantages of the JL series is its ability to support multi-channel and multi-functional control, making it highly adaptable for different environments. It is especially well-suited for use in areas with high humidity or fog, where traditional sensors may fail due to interference. This makes it ideal for applications such as automatic water saving systems, remote control switches, and proximity switches.
Applications of the JL series include:
1. **Automatic Shower Water-Saving Device (JL-IL)**
Traditional infrared-based shower systems often malfunction in bathrooms due to steam and moisture. The JL series ultrasonic sensor overcomes this issue by penetrating water mist, allowing for reliable non-contact control. Users can turn the water on and off simply by being present under the showerhead, leading to significant water savings—over 30% in many cases.
2. **Automatic Hand-Washing Machine (JL-1X)**
Many infrared hand-washing machines have limited detection ranges, typically around 10 cm, which can lead to inconsistent performance. The ultrasonic technology used in the JL series allows for flexible control distances, ranging from 10 to 30 cm, ensuring more accurate and reliable operation. This makes it a hygienic solution that helps prevent the spread of germs.
3. **Automatic Urinal Flushers (JL-IG, JL-IT, JL-1D)**
These devices use ultrasonic sensors to detect the presence of users and automatically flush the urinal. The detection range can be set between 0.2 and 3 meters, and the system uses a trailing edge trigger circuit to maintain flushing for 5–10 seconds after the user leaves. Compared to infrared models, these systems offer better installation flexibility, longer detection range, and improved water-saving performance—often saving over 50% of water.
Overall, the JL series ultrasonic electronic switches are widely used in hotels, restaurants, hospitals, industrial facilities, and residential buildings across China. Their reliability, efficiency, and adaptability make them a leading choice in the field of automatic control and water conservation.
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