Constant pressure and constant temperature control method for wall-hung boiler heating system

Abstract

The invention discloses a constant-pressure and constant-temperature control method for a wall-mounted stove heating system, and belongs to the field of constant-temperature control methods for heating systems. The method comprises the following steps that 1, the burnt gas quantity of the wall-mounted stove in unit time is adjusted, so that heat lost in unit time of the heating system and heat obtained by mediums in the heating system through a heat exchanger are balanced, and the temperature of the mediums in the heating system is constant; and 2, under the condition that the temperature of the mediums in the heating system is kept constant, a combustion system continuously burns to supply the heat, the heat loss is reduced, so that the purpose of energy conservation is finally achieved,and meanwhile, the safety and the reliability of the operation of heating equipment are ensured.

Description

technical field [0001] The invention relates to a constant temperature control method for a heating system, in particular to a constant pressure and constant temperature control method for a wall-hung boiler heating system. Background technique [0002] Wall-hung boilers are currently important winter hot water and heating equipment, and they are used in a huge amount. At present, the wall-hung boilers sold on the market set the operating mode through the operating software when they leave the factory, and set the upper and lower temperature differences: the set temperature difference is mostly 20°C, 25°C , 29°C, the user can set the upper limit of the working temperature during use, such as setting 65-70°C, the wall-hung boiler will start to work, stop the boiler when the temperature reaches 65-70°C, and wait for the temperature to drop to 45-50°C , the wall-hung boiler is restarted, and the wall-hung boiler is always in the working state of starting combustion—heating to a...

AI Technical Summary

Problems solved by technology

[0002] Wall-hung boilers are currently important winter hot water and heating equipment, and they are used in a huge amount. At present, the wall-hung boilers sold on the market set the operating mode through the operating software when they leave the factory, and set the upper and lower temperature differences: the set temperature difference is mostly 20°C, 25°C , 29°C, the user can set the upper limit of the working temperature during use, such as setting 65-70°C, the wall-hung boiler will start to work, stop the boiler when the temperature reaches 65-70°C, and wait for the temperature to drop to 45-50°C , the wall-hung boiler is restarted, and the wall-hung boiler is always in the working state of starting combustion—heating to a high set point—cooling to a low set point—starting combustion. , Restart, and then stop the furnace, each cycle is about 8-13 minutes, 4-5 times per hour when the room temperature is high in winter, and gradually increase to 6-7 times when the room temperature is low. Repeated shutdown and frequent startup, the number of startups and shutdowns per day is more than 100-150 times, the heating water temperature fluctuates between 45-70°C, the pressure also fluctuates between 1.5-2.5Kg, and the furnace temperature is at Fluctuating up and down between 50-500 ℃, the floor heating heating system starts and stops more times, and starts more frequently, which leads to the operation result of the wall-hung boiler: the temperature and pressure cannot be kept constant, the heating load can never be stable, and the wall-hung boiler is always on and off stop working

[0003] Although it can meet the needs of indoor heating operations, in the actual operation process, on the one hand, the service life of the start-stop control switch in the wall-hung boiler is too fast, and the temperature difference in the wall-hung boiler is large. Long-term use causes the wall-hung boiler to malfunction. Reduce the service life of the wall-hung boiler, and it is very easy to cause the wall-hung boiler to continue heating for a long time due to the failure of the start-stop switch. In severe cases, it may even cause an explosion due to excessive pressure in the heating pipeline, which seriously threatens the wall-hung boiler and related heating equipment. On the other hand, the heat lost by the heating system per unit time and the heat obtained by the medium in the heating system through the heat exchanger are unbalanced, and the heat loss is more. When the temperature of the wall-hung boiler is lowered and restarted, the temperature is lower Low gas consumption, large gas consumption, at the same time, the air intake will be unstable during the working process, and a large amount of gas will enter the wall-hung boiler when the wall-hung boiler is started, causing the wall-hung boiler to generate a "boom...boom..." sound of stuffy guns at the moment of startup. The sound is hundreds of times a day, and the fuel cannot be fully burned in the wall-hung boiler. At the same time, the smoke must be exhausted in time during the gas combustion process. The traditional wall-hung boiler will part of the heat generated by the gas during the smoke exhaust process. Into the atmosphere, so that the heat can not be fully utilized, but also not conducive to environmental protection