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What is a flow switch and what is its working principle? Thank you
Water flow switch is a sensor device used for water circulation control, inlet and outlet control, water heating control, water pump switch control, solenoid valve on/off control or outlet power-off, outlet power on control and other processes in electric water heaters, solar water heaters, air conditioners and other water systems. When a certain flow rate is reached, the water flow is converted into a switch type electrical signal. Construction of water flow switch: The flow switch consists of a magnetic core, a reset spring, a forged copper or carbon shell, and a sensor. The shell is made of H58 forged copper or polycarbonate, the magnetic core is made of neodymium iron boron permanent magnet material, and the sensor magnetic switch is an imported medium power component. The inlet and outlet interfaces are both G1/2 "standard pipe threads. Working principle: When the water flow rate in the pipeline is greater than 0.75L/min, the magnetic core is displaced by the water flow and drives the magnetic source to produce a magnetic control effect, causing the sensor to output a "1" switch signal. This signal is input to the equipment control system, and after power amplification, it achieves the purpose of water flow control. When the water flow rate in the pipeline is less than 0.75L/min, the coarse hole magnetic core drives the magnetic source to return under the pushing force of the reset spring, causing the sensor to output a "0" switch signal and stop the systems operation. Product features: Flow switches have advantages such as high sensitivity and strong durability. Main technical parameters Appearance dimensions: Length X diameter=62mm X Φ 2
(1) Environmental temperature not lower than 0 ℃. Do not strike the shell. Stay away from magnetic objects.
(2) The output of the signal is a switch quantity, so the connection method of the controlled object must also be a switch control relationship.
(3) The power of the controlled object shall not exceed the signal load capacity.
(4) This device is a water-based control device and cannot be used for controlling other media. Multiple specifications and sizes are used to detect whether the liquid in the pipeline is flowing and whether the flow rate (i.e. liquid flow pressure) meets the requirements. At the same time, a signal is output (provided) through the switch electrical contact to switch the on/off state. 2. The equipment system determines the working condition of the pipeline system by detecting whether there is a signal or controlling the current passing through this switch (the on/off status of the water flow switch electrical contact), and provides corresponding control or operation modes or measures; 3. For example, in the water circulation pipe network system of central air conditioning, automatic sprinkler fire extinguishing system of fire protection system, and certain types of liquid circulation cooling system pipelines, water flow switches are commonly used to detect the flow of liquids. 4. It can monitor the liquid flow in the pipeline in real time, provide switch output, and use 6 LEDs to disp
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