Heat exchanger in wall hung boiler

 Wall hung boilers have become the third largest gas product after gas water heaters and gas stoves, and wall-hung boilers are used most often in household heating. Wall-hung boilers can not only provide users with domestic hot water, but also heat the home.

Wall-hung boilers can be divided into single-heating and dual-purpose boilers in terms of function, and they can be divided into instant heating and volumetric heating methods. The instant heating models are divided into casing machines and plate changers. What is the difference between a wall-hung boiler casing machine and a plate changer? How much do you really know? Did you choose the right one?

The heat exchanger can be described as the core component of the gas wall-hung boiler, which is responsible for heat exchange between the flue gas generated after the combustion of the gas and the water in the system.

From the perspective of the heat exchange structure of the heating and hot water functions of the ordinary wall-hung boiler (except for the condensing wall-hung boiler), the heat exchange method of the finned tube heat exchanger and the heat exchange method of the plate brazed heat exchanger are gas The main heat transfer method of wall-hung boiler.

Finned tube heat exchanger wall-hung boiler

Rows of thin fins are composed of standard thickness and distance, which can ensure sufficient heat exchange area and high efficiency of heat exchange when the boiler size is not large.
1. Heating function
The high-temperature flue gas produced after combustion passes through the heat exchanger to heat the heating water through heat exchange. The circulating water pump makes the heating water circulate in the wall-hung boiler and the heating system to provide heating. At this time, the domestic hot water does not flow.
2. Domestic hot water function
The high-temperature flue gas generated after combustion passes through the heat exchanger, and the heating water is heated by heat exchange, and then the domestic hot water in the internal pipeline is heated by the heating hot water. At this time, the heating water is basically in a static state.

Plate type brazing heat exchanger wall-hung boiler

1. Heating function
The high-temperature flue gas produced after combustion passes through the main heat exchanger to heat the heating water through heat exchange. The circulating water pump makes the heating water circulate in the wall-hung boiler and the heating system to provide heating.

2. Domestic hot water function
The high-temperature flue gas generated after combustion passes through the main heat exchanger, and first heats the heating water through heat exchange. The circulating water pump makes the heating primary water perform a small cycle in the wall-hung boiler between the main heat exchanger and the plate heat exchanger of the boiler.

The tap water passes through the plate heat exchanger and the heating primary water conducts counter-flow heat exchange, and the two do not mix in the plate heat exchanger.

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