What are the advantages and disadvantages of domestic gas wall-hung boiler?

The advantages of domestic gas-fired wall-hung boiler are:

1, the heating period is decided by itself. Others started central heating on1October 5 1 15. If I think it is necessary, I can even start heating my room from1October110.

2, the room temperature is freely controlled, if you want to be high, you will be high, if you want to be low, you will be low.

In fact, after so many years of experience, I can tell you responsibly that the level of gas cost (heating cost) depends on too many factors, such as whether it is in extremely cold weather. Is there thermal insulation material on the exterior wall of the house? Is the quality up to standard? Do you live on the top floor? Do neighbors turn on the heating at the same time as you? Is the design and construction of heating system reasonable? Is the usage habit reasonable? Wait, it can't be simply compared with the cost of central heating. For example, the heating season in my home for more than four months every year, including the cost of gas such as bathing and cooking, will still be about 500 yuan cheaper than the heating cost paid by central heating.

Brief introduction: Domestic gas wall-hung boiler is a common name of "gas wall-hung boiler", and the standard name in China is "gas wall-hung rapid heating water heater". It has many safety protection measures, such as anti-freezing, anti-dry-burning, accidental flameout protection, over-temperature protection, water pump anti-jamming protection and so on.

Workflow:

In the standby working state of the boiler, when the boiler senses that there is a heating demand, start the fan and start "pre-purging" for 30 seconds to form negative pressure in the combustion chamber and air enters the combustion chamber; Start the air pressure difference switch and open the gas solenoid valve, and the gas enters the combustion chamber and is premixed with air; The circulating water pump starts to work; At the same time, the ignition electrode begins to discharge to form an arc to ignite the gas. After gas combustion, the flame heats the boiler water in the main heat exchanger for heat exchange, and the circulating water pump sends the hot water out for heat exchange with the secondary system for heating or heating.

When there is a demand for domestic hot water, start the domestic hot water flow switch and switch the electromagnetic three-way valve. The boiler water exchanges heat with the domestic hot water through the heat exchanger, and then supplies the domestic hot water.

The heating system is normal → the pressure of the detection system is normal → the water pump works → the water flow switch or the water flow sensor is turned on → the water flow signal is output → the fan is cleaned before entering → the wind pressure is detected to be normal, and all safety devices are normal → ignition (the fan enters low-speed operation or power-off depends on inertia operation) → the primary and secondary electromagnetic valves (proportional valve automatically enters the ignition volume, and the segmented valve enters the small fire ignition) → ignition → ion flame induction, normal combustion, and the fan enters the normal speed →