Latent heat exchanger in condensing boiler

Abstract

A latent heat exchanger of a condensing boiler, in which the condensing boiler includes a sensible heat exchanger absorbing combustion sensible heat generated by a burner, a latent heat exchanger absorbing latent heat of water vapor contained in a combustion product heat-exchanged by the sensible heat exchanger, an exhaust hood discharging the combustion product flowing through the latent heat exchanger, and a condensed water outlet discharging condensed water generated from the latent heat exchanger. In the latent heat exchanger the combustion product burnt by the burner flows through the sensible heat exchanger, is vertically raised toward the latent heat exchanger, is slantingly lowered in an outward direction at an acute angle from a horizontal plane, is heat-exchanged by the latent heat exchanger, is vertically raised, and is discharged to the exhaust hood.

Description

TECHNICAL FIELD[0001]The present invention relates generally to a latent heat exchanger of a condensing boiler and, more particularly, to a latent heat exchanger of a condensing boiler, which allows an exhaust direction of a combustion product and a discharge direction of condensed water to be identical to reduce exhaust resistance of the combustion product and to smoothly discharge the condensed water generated from the latent heat exchanger, and which has a simple coupling internal structure.BACKGROUND ART[0002]Boilers are apparatuses that make a desired area warm by heating a heat medium in a closed container with a heat source, and are each made up of a burner burning fuel and a heat exchanger exchanging heat between burnt high-temperature combustion air and heating water.[0003]Earlier heat exchangers of boilers used only sensible heat generated during combustion of the burner, and discharged the high-temperature combustion air through an exhaust hood. Thus, the boilers were ver...

AI Technical Summary

Benefits of technology

The present invention is a latent heat exchanger for a condensing boiler. It has multiple tubes that are inclined vertically and allow for the exhaust of combustion products and the smooth discharge of condensed water. The design also allows for alternate flow direction of the heat medium, which improves heat-exchanging efficiency in a limited space. The simple coupling structures between the tubes and heat-exchanging fins allow for a flow path that increases the heat-exchanging area and time.

Problems solved by technology

Thus, the boilers were very low in heat efficiency, and required a long time to obtain high-temperature heating water.

For this reason, the latent heat recollected by the condensation is again discharged in an evaporation heat form, and thus it is impossible to obtain maximum condensation efficiency.

This downward combustion type condensing boiler is estimated to be a most preferable condensing boiler from the viewpoint of a structure capable of recollecting the most latent heat, but it is accompanied with a limitation that a burner in which downward combustion is possible should be essentially provided.

Since the flame reacting with the secondary air is long, has low density, and tends to be directed upwardly, the Bunsen burner has a disadvantage in that it can be applied only to an upward combustion type.

However, the pre-mixed burner has disadvantages in that combustion stability is low, and that an expensive control system should be used to implement very complicated combustion control.

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