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Share the history of the development of the flow switch
Author::    Author::2013-01-12 14:35:54    Writing:【big】【in】【in
Abstract:The Abstract: flow switch, also known as a flow switch or flow sensors, the English called Flowswitch or Watersensor. Tube for detecting fluid flow or a product of the stop output signal to protect the system. The flow switch on the Chinese market in the late 1980s, which was mainly used for automatic water heater above, when the differential pressure flow switch in the 1990s, has been widely used in household gas water heater, gas water heater water the gas linkage valve valve part. Differential pressure flow switch works is when the water flow through the venturi tube, the incoming water pressure and water pressure, this pressure difference drives a micro-switch to generate a signal. This flow switch switch signal power, direct drive control system, but the starting pressure can not be used for ultra-low-pressure equipment. In the 1990s, due to the widespread use of the reed switch market gravity flow switch and piston flow switch. The working principle of the gravity-type flow switch is an upward lift force when the water flow will be a magnetic spool lift proximity to the driver for the reed switch to generate a signal, such a flow switch advantage is that the water pressure is low, have a high water level in the difference can drive switch, but the water quality requirements, and must be installed upright. Piston flow switch works is to work in Pistons built a toroid, water pressure pushed the piston, piston within the bead is pushed to the position of the reed switch, the reed switch signal is generated. The type of switch performance and stability, are widely used in various types of equipment above. And the part piston flow switch can adjust the operating point of the reed switch to change the traffic signal, and so is the first choice of the various types of equipment. However, such a switch cost is slightly higher, the price will be a little expensive side. After 2000, the application of a Hall element, appears type flow switch of the output pulse signal of the rotor, such flow switches mating array can detect the size of the water flow, but due to the design, etc., a part of the rotor-type flow switch in the water flow is too can not be rotated or not flexible hours or less, so the ideal pulse signal flow switch
 
 
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