Wall-mounted boiler water pressure sensor manufacturer: principle and function of wall-mounted boiler parts water pressure switch and pressure sensor

Wall-mounted boiler water pressure sensor manufacturer: water pressure switch is a safety protection element to ensure the normal operation of the wall-mounted boiler, which can prevent the wall-mounted boiler from burning or dry burning without water. When the system circulating water pressure is very low or there is no system water, the water pressure switch is in the open state, the controller receives the open signal of the water pressure switch to report the fault, and the machine is in the shutdown state; if the system water pressure reaches the pressure at which the wall-hung boiler can operate normally, the pressure switch In the open state, the controller enters the next step of judgment and is ready to start.

Wall-mounted boiler water pressure sensor manufacturers: Working principle: When the system water pressure is low, the force of the spring acting on the diaphragm is greater than the force of the system water acting on the diaphragm, and the internal moving contact of the water pressure switch is in the disconnected state under the action of the spring force; When the system water pressure gradually increases, the force exerted by the system water pressure on the diaphragm is greater than the force exerted by the spring. The system water pressure overcomes the spring force in the water pressure switch, forcing the moving contact to contact the fixed contact, and the water pressure switch is turned on.

Wall-mounted boiler water pressure sensor manufacturer: The main function of the water pressure switch is to prevent the gas heating water heater from burning dry under low water pressure or without water, or to remind the user to inject water into the heating system.

The water pressure switch is generally a pressure spring contact switch, which has an "off" value and an "on" value, that is, when the pressure is lower than 0.2Bar, the heating system is turned off, the wall-hung boiler does not work, and the lack of fault code is displayed (ot control fault code display 04); Fill the heating system with more than 1 bar of water, turn on the water pressure switch (04 returns to normal), and turn off the water injection knob.

As a safety device in the heating system, the water pressure switch is a very useful accessory. The failure rate is not high, and the connection aperture is much larger than the water pressure gauge of the heating system.

In the early days, there was a kind of water pressure switch, which we called "dynamic pressure water pressure switch". It is composed of diaphragm, push rod and micro switch. When the wall-hung boiler was ready to start, the water pump was working. After the pump works, the pressure difference on both sides of the diaphragm pushes the push rod, turns on the micro switch, and the wall-hung boiler continues to rotate the fan below, ignite, and open the gas valve. Today, however, leather putters are largely not used. The water pressure switch used now is called "static pressure water pressure switch", which is relatively simple, that is, to see if the heating system has water pressure.

Water pressure switch can be divided into adjustable and non-adjustable. The water pressure switch in the above picture can be adjusted. Under normal circumstances, an error is reported to close 0.2Bar and close 1Bar normally. When the water pressure is low and there is no booster pump, the two AB screws can be adjusted to reach the working range of 0.2 bar ~ 0.75 bar or even 0.2 bar ~ 0.45 bar to start the wall-hung boiler normally.

Wall-mounted boiler water pressure sensor manufacturers: Now, some of the company's products have removed the water pressure switch, and their safety can be guaranteed. Because the temperature sensor is added in the heating supply and return water, it can be judged by the change of the temperature of the supply and return water in the loop. Is the pressure sensor the same as the pressure switch? As far as I know, domestic brands are not very useful, and the electronic display pressure may be a pressure sensor. The water pressure failure alarm means that the system is short of water. Just change it directly, no one can fix it. Pressure sensors should be rarely used, and all use pressure switches. Under the influence of the heating water temperature and system impurities, the service life of the water pressure sensor is not long.

Wall-mounted boiler water pressure sensor manufacturers: As far as we know, there are also companies in China that are preparing to try to remove the water pressure switch. It seems economical, but perhaps the maintenance cost and machine failure rate will rise, and even pay for safety. Just like the removal of air pressure switches and overheat protection in the industry, a lot of theoretical, experimental and practical support is definitely needed, especially under the conditions of large fluctuations in domestic water pressure, voltage, air pressure, and gas composition, I hope to prepare to try to remove the water pressure switch The company is cautious.

Jiangmen Hengmin Intelligent Control Instrument Co., Ltd. is a pressure transmitter manufacturer, mainly engaged in oil pressure sensors, wall-mounted boiler water pressure sensors, urea pump pressure sensors, hydrogen pressure sensors, pressure calibrators, automobile pressure sensors, water pump pressure sensors, water pressure Sensors, intelligent pressure controllers, high pressure sensors and other products. Our company found in the research industry production activities that with the increasing popularity of the Internet of Things and intelligent manufacturing concepts, the demand for pressure sensors in my country has grown rapidly in recent years. In response to the needs of the era of intelligent manufacturing, our company has developed high-precision testing instruments and special production system equipment for pressure sensor manufacturers to help sensor manufacturers greatly reduce the labor intensity of testing, reduce the number of workers, improve product quality, improve production efficiency and reduce production costs.