Secondary heat exchanger of condensing gas water heater

Abstract

The invention relates to a secondary heat exchanger of a condensing gas water heater, mainly comprising a fume emission component, a secondary heat exchange component, a condensing water discharge pipe, a condensing water collecting disk and a thermal baffle. The secondary heat exchange component is welded with the fume emission component, the condensing water collecting disk is arranged below the secondary heat exchanger component and welded with the fume emission component, and the condensing water discharge pipe is welded on the fume emission component. The secondary heat exchanger of the condensing gas water heater is characterized in that the secondary heat exchanger component is provided with a double-layer coil heat exchanger, and the thermal baffle is fixed on the fume emission component by self-tapping screws. The invention can prevent condensing water from eroding welding lines on a waterway system, prevents the condensing water from being evaporated once again, improves the heat exchange efficiency, greatly prolongs the service life of the product and ensures the long-term validity of the heat exchange effect.

Description

technical field [0001] The invention relates to a secondary heat exchanger of a condensing gas water heater, in particular, it is used in a condensing gas water heater to fully perform the combustion product of the gas --- the sensible heat in the high-temperature flue gas and the latent heat of the water vapor in the flue gas. absorb. Background technique [0002] There are several types of secondary heat exchangers used in condensing gas water heaters currently on the market: stainless steel bellows heat exchangers, stainless steel shell and tube heat exchangers, stainless steel finned tube heat exchangers and increased corrosion resistance Coating protected copper finned tube heat exchanger. For the bellows heat exchanger, the bellows used in the product itself has an axial weld from the beginning to the end, which is very easy to cause cracking of the weld when bending the tube; and the corrosion of the weld by condensed water during use will also Cause damage to the p...

AI Technical Summary

Problems solved by technology

Copper-finned tube heat exchangers with anti-corrosion coating treatment, due to the imperfect and complicated manufacturing process, it is difficult to achieve uniformity and complete placement of the coating on the parts, thus losing complete protection; due to the use environment After the machine runs for a period of time, the coating will peel off from the copper body and lose its protective effect

At the same time, due to the absence of a heat shield in this type of product, the condensed water is vaporized again, which affects the heat exchange effect.

For the above heat exchangers, due to the welding seams of the product itself, many welding seams produced during product manufacturing, design defects and imperfect processes, many factors affect the heat exchange effect of the heat exchanger and the product life is also shortened. Difficult to obtain long-term protection

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