The multi smoke pipe vertical furnace type is essentially a volume heat exchanger. The structure is the same as that of the ordinary hot water boiler. In the 1940s, it has been improved into a multi-smoking pipe, which increases the heat exchange area and the heat efficiency can also exceed 90. The application of strong smoke exhauster and the use of the folding blade can increase the flow rate of the hot flue gas in the smoke pipe, and form a large angle between the direction of the flue gas flow and the inner wall.

The smoke pipe of this heat exchanger is vertical upward, and the strong exhaust of the fan is added. The hot flue gas has a high velocity in the smoke pipe, and no dead angle will not deposit dust and dust. All heating surfaces are in contact with water, and the heat exchange surfaces directly contacted by high temperature flame are not seriously heated. Copper materials are not protected (deoxidized pure copper must be used). Therefore, it is not easy to produce and deposit dust and dust on the heating surface. For long-term use, the thermal efficiency is almost unchanged. Because of the large capacity of the positive displacement heat exchanger, it will not cause the phenomenon of post boiling. Under the condition of overheating protection, it can not scale for a long time.

For example, finned tube heat exchanger, only with gas finned tube heat exchanger and water gas linkage control system can finned tube heat exchanger be applied to water heater. Any reform of combustion mode, control mode and heat exchange mode are mutually affected. If there is no half gas and half blast, it is difficult to miniaturize the volume heat exchanger and use it for wall Hang it on the stove. According to the water quality, Qidong Shanghai Star central air conditioning cleaning company has selected the organic composition of water treatment agent formula through the experiment.

The formula has the double functions of corrosion inhibitor and scale inhibitor, and it has the properties of high temperature resistance and not easy to hydrolysis, and it is also convenient to use. The acrylic acid in the formula is a dispersive scale inhibitor through the propylene acetate copolymer, which can surround the colloid particles in water to achieve the purpose of dispersing and inhibiting scale. Organophosphate is a kind of chelating scale inhibitor. Because of the molecular containing meridion, phosphate group can form stable complex with calcium and magnesium plasma in water, so as to achieve the purpose of scale inhibition. Organic transient salt has better corrosion inhibition effect. It is a kind of cathodic inhibitor participating in or membrane. Its complexation with ions is more stable than polyphosphate, so the protective film is more firm .