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How does the gas boiler control the temperature change?

2020-07-31 09:42    page view:

Guide: Today's gas boilers can control temperature changes by themselves, mainly because gas boilers have an automatic control system. In boilers with automatic control systems, temperature sensors are installed. These sensors are equivalent to our eyes when they work. Responsible for transmitting the operating status of the boiler to the controller on the boiler through data.

  The current gas boilers can control temperature changes by themselves, mainly because gas boilers have an automated control system.

  In boilers with automatic control systems, temperature sensors are installed. These sensors are equivalent to our eyes when they work, and they are responsible for transmitting the operating conditions of the boiler to the controller on the boiler by means of data. For example, a boiler has a set working temperature of 55°C. When the boiler is running, the temperature sensor in the boiler collects that the water temperature in the furnace is 40°C at this time. After the temperature data is sent to the controller, the controller judges that the temperature is far from the set temperature, so the controlled burner continues to heat the water in the boiler in a fire state.

  The boiler continues to run, and the temperature sensor is continuously collecting temperature data and sending it to the controller. As the burner heats up, the temperature gradually rises to 53 degrees. At this time, the controller judges that the boiler water is close to the set temperature by comparing the set temperature with the current temperature, and then controls the burner to reduce the flame. As the temperature gets closer and closer to the set 55°C, the variable frequency burner can finely control the flame size according to the actual heat demand, and keep the temperature at 55°C by gradually approaching it. When the heat demand changes, the flame will also change accordingly, so that the boiler only works in a state of maintaining temperature.

  Traditional boilers generally use three-stage fire (large fire, medium fire, small fire). For some situations, such as, the heat demand is just greater than that of medium fire but is far from the point where high fire heating is required. At this time, the controller will still Continue to use high heat to heat, the temperature will rise rapidly at this time, and soon exceed the set temperature. At this time, the controller detects that the water temperature has exceeded the temperature, so it controls the burner to change to a low fire.

  However, the small fire can not meet the heat demand. At this time, the boiler water temperature will drop. When it drops to a certain level, the controller will turn the small fire into a high fire. However, compared with frequency conversion control, this method not only has temperature fluctuations, but also has a certain phenomenon of waste gas in empty combustion.

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