CN2283822Y

CN2283822Y - Heat exchanger for gas boiler

Info

Publication number: CN2283822Y
Application number: CN96220566U
Authority: CN
Inventors: 赵兴元; 吴东民
Original assignee: Kyung Dong Boiler Co Ltd
Current assignee: Kyung Dong Boiler Co Ltd
Priority date: 1996-04-23
Filing date: 1996-09-13
Publication date: 1998-06-10
Anticipated expiration: 2006-09-13
Also published as: KR970070938A

Abstract

The utility model provides a copper heat exchanger for a gas fired boiler. The utility model is designed to have high capacity, semi-permanent service life and durative performance; besides, the utility model has smooth combustion flow and smooth gas exhaust flow so as to prevent corrosion; besides, the utility model can be used in a boiler of condensation mode.

Description

The heat exchanger of gas fired-boiler

The utility model relates to by using teflon (TEFLON), enamel, heat-resisting paint and pottery etc. on the surface of heat-exchange tube and the surface of fin, and the surface, inside of heat exchange body imposes surface coating, not only go for the heat exchanger of the condensing mode of copper material, even high load capacity also can use, the heat exchanger of the gas fired-boiler that can under the low load condition of ratio control mode, turn round.

Gas fired-boiler in the domestic boiler, it is a certain amount of combustible gas that provides by gas piping at main burner and pilot burner up-igniting by ignition transformer, in addition, because built-in heat exchanger, thereby also need by feedwater pipe arrangement and greenhouse pipe arrangement room upper flume and hot water circulating pump etc. are set.Above-mentioned heat exchanger, lamination heat exchanger plate together is integrated, just the greenhouse water that is provided can be carried out heat exchange by the combustion heat.

That is, as the heat exchanger in the past that on gas fired-boiler, uses, owing to be to constitute by the high copper material of pyroconductivity nearly all, thereby the capacity of this heat exchanger is actually quantity and basal area decision by the fin of heat absorption.

For example, many more with the quantity of certain spaced fin in the volume of enough heat exchangers, can realize the design of high power capacity more.

But, if the interval between above-mentioned fin is not maintained at more than certain distance, then have and to recruit the security incident that causes by the corrosion of fin obstruction, low temperature and the condition of high temperature etc. to producing, and the performance of heat exchanger descends, shortening service life, and, can not be used for the shortcoming on the condensing mode.

Thereby, in heat exchanger in the past, owing to, the distance between fin and the fin is maintained below the certain distance in order to keep slick and sly exhaust flow, thereby have the shortcoming that increases of the high more heat exchanger of capacity with being in proportion.

And, if through using over a long time, owing to low temperature and high temperature corrosion, be included in the foreign matter that contained in the moisture of burn in burning and gas-exhausting that the toxic gas in the burning and gas-exhausting causes attached to a plurality of fin surface, thereby along with the reduction of the increase rate of heat exchange of service life of heat exchanger, and the interval stenosis between above-mentioned fin is narrow, becomes the main cause of the security incident that the decline by the exhaust capacity of burning and gas-exhausting produces.

For above-mentioned shortcoming, though copper heat exchanger can be used in the boiler of the non-condensing mode of exhaust more than dew-point temperature, but in the boiler of the high efficiency condensing mode that exhaust is turned round below dew point, the influence of the acidic group of the moisture that is gone out by cold end corrosion and condensation can not be used and be restricted.

The utility model proposes for the shortcoming that solves heat exchanger in the past as described above and have, its objective is that providing a kind of passes through on the surface of the heat-exchange tube that constitutes copper heat exchanger and the surface of fin, and the surface, inside of heat exchange body applies teflon, enamel, the surface coating of heat-resisting paint and pottery etc., not only can seek the high power capacity design, semipermanentization of service life, continue to keep performance, the slyness of burning and gas-exhausting flows, and prevent corrosion, but also copper heat exchanger can be used for the heat exchanger of the gas fired-boiler on the boiler of condensing mode.

The heat exchanger of gas fired-boiler of the present utility model is characterised in that to achieve these goals: in the heat exchanger that by heat-exchange tube (3) a plurality of fin (1) of certain intervals is brazing on heat exchange body (2) and the combustion chamber, on the surface, inside of the surface of the surface of above-mentioned heat-exchange tube (3) and fin (1) and heat exchange body (2), form surface coating (8) with teflon, enamel, heat-resisting paint and pottery etc., just can high capacity and make the big or small miniaturization of volume of same capacity comparison.

Fig. 1 is an oblique view of showing the heat exchanger of gas fired-boiler of the present utility model.

Fig. 2 is the heat-exchange tube of detail display Fig. 1 and the profile of fin.

Below, embodiment of the present utility model is described in detail in detail with reference to the accompanying drawings.

Fig. 1 is an oblique view of showing the heat exchanger that relates to gas fired-boiler of the present utility model, the heat exchanger of this gas fired-boiler is by using teflon, enamel, heat-resisting paint and pottery etc., on the surface of heat-exchange tube (3) and the surface of fin (1), also have the surface, inside of heat exchange body (2) to impose surface coating (8), not only go for the heat exchanger of copper condensing mode, and under high load capacity, can use, also can under the low load condition of ratio control mode, turn round.

Heat exchanger is the mechanism with heat absorption function, it is to constitute like this, on heat exchange body (2) and combustion chamber, pass through heat-exchange tube (3), a plurality of fin (1) are welded with certain interval solder brazing, absorb the combustion heat that goes out by not shown burner combustion from above-mentioned heat exchange fins (1) and heat-exchange tube (3), and the heat that will absorb is passed to the coal heating (water) that flows through in the internal duct of heat-exchange tube shown in Figure 2 (3), and this heat can be used for heating or use hot water.

On certain intervals, arrange and be arranged on the fin (1) above the heat exchange body (2), just can be absorbed in the heat of burning on the burner, by imposing surface coating (8) on the surface of this radiator (1) with teflon, enamel, heat-resisting paint and pottery etc., corrosion that just can prevent low temperature and high temperature corrosion, cause by the poisonous gas that is contained in the burning and gas-exhausting etc., and the foreign matter that is contained in the moisture in burning and gas-exhausting etc. is difficult to be attached on the surface coating (8) of above-mentioned a plurality of fin (1).

And then, to be applied with the fin (1) of surface coating (8) and the distance between the fin (1) and be arranged to 2～3mm, 3mm is narrow than the distance between fin in the past (consider corrosion and be included in distance between the fin that adheres to of foreign matter in the moisture etc.), even thereby seeking that the volume of heat exchanger is increased, and when making the miniaturization of size of high capacity and same capacity comparison, can improve keep between fin apart from the time by guaranteeing to design the security that exhaust capacity brings.

As shown in Figure 2, by the heat-exchange tube (3) that solder brazing welds above-mentioned multi-disc fin (1), the combustion heat that will on burner, burn and the hot media (water) that flows by the combustion heat that above-mentioned fin (1) the transmits portion within it of passing to.This heat-exchange tube (3) is also the same with above-mentioned fin (1), by impose the surface coating (8) of teflon, enamel, heat-resisting paint and pottery etc. on its surface, the corrosion that the burn into that just can prevent low temperature and high temperature corrosion, is produced by the poisonous gas that is included in the burning gases is caused with the composition of gas by burning etc.

Heat exchange body (2) and combustion chamber meaning are trapped among the centre with a plurality of fin (1) and heat-exchange tube (3) as mentioned above like that by the combustion space of burner combustion, and constitute the exhaust channel by the burning and gas-exhausting of burner combustion.

Thereby, also impose surface coating (8) by surface, inside with teflon, enamel, heat-resisting paint and pottery etc. in above-mentioned heat exchange body (2), not only also go for the heat exchanger of copper condensing mode, even under high load capacity, also can use, can also under the low load condition of ratio control mode, turn round.

On above-mentioned heat exchange body (2), preheating reel to be installed and to prevent the overheated pipeline in combustion chamber (7), it absorbs the heat of a part of combustion chamber, thereby prevents the overheated of combustion chamber, within it portion's coal heating that also flowing.Outside the connecting piece (6) that connects the heat-exchange tube (3) of executing surface coating (8) is set, also be provided with the admission port of recirculated water (4) and the hot-water outlet who goes out hot water (5).

As above being described in detail, pass through with teflon, enamel, heat-resisting paint and pottery etc. on the surface of the heat-exchange tube that constitutes copper heat exchanger and the surface of fin if adopt the utility model then can provide a kind of, and the surface, inside of heat exchange body imposes surperficial 4 overlay films, not only can seek the high power capacity design, the continuing of semipermanentization of service life, performance kept, the slyness of burning and gas-exhausting flows and prevents saprophage, and can use the heat exchanger of the gas fired-boiler of copper heat exchanger in the boiler of condensing mode.

Claims

1. the heat exchanger of a gas fired-boiler by in the heat exchanger of a plurality of fin (1) solder brazing on heat exchange body (2) and combustion chamber of heat-exchange tube (3) with certain intervals, is characterized in that:

With teflon, enamel, heat-resisting paint and pottery etc., on the surface of above-mentioned heat-exchange tube (3) and the surface of fin (1), also have the surface, inside of heat exchange body (2) to impose surface coating (8).

2. according to the heat exchanger of the described gas fired-boiler of claim 1, it is characterized in that: will impose the fin (1) of above-mentioned surface coating (8) and the distance between the fin (1) and be arranged to 2～3mm.