KR100424854B1 - A body heat exchanger of condensing gas boiler - Google Patents

Abstract

The present invention constitutes a gas boiler so as to have a heat exchanger unit integrally formed with a main heat exchanger unit and a sub-heat exchanger unit, and exchanges sensible heat of combustion exhaust gas generated in an upper gas burner and latent heat generated by condensing water vapor in the combustion exhaust gas in a single structure. The present invention relates to an integrated heat exchanger of a condensation gas boiler designed to improve thermal efficiency by minimizing absorption at a portion and miniaturizing a gas boiler. According to the present invention, each inlet and outlet are formed, and a plurality of water flow plates provided with a chamber therein are installed to be connected to each other so that the feed water entering the inlet flows out to the discharge port, but between the plurality of water flow plates. By inserting the plate is characterized in that it comprises an integrated heat exchanger made to absorb the sensible and latent heat at the same time.

Description

Integrated heat exchanger of condensation gas boiler {A BODY HEAT EXCHANGER OF CONDENSING GAS BOILER}

The present invention relates to an integrated heat exchanger of a condensation gas boiler, and more particularly, a gas boiler is configured to have a heat exchanger unit which integrally forms a main heat exchanger unit and a sub-heat exchanger unit, and the sensible heat of the combustion exhaust gas generated in the upper gas burner. The present invention relates to an integrated heat exchanger of a condensation gas boiler designed to improve thermal efficiency and to miniaturize a gas boiler by simultaneously absorbing latent heat generated by condensing water vapor in combustion exhaust in a single heat exchange unit.

1 is a perspective view showing the structure of a conventional gas combustion device.

Referring to the structure of the heat exchanger of the gas combustion apparatus used in the prior art, as shown in FIG. 1, the gas burner 3 and the two-stage heat exchanger 9 including the main heat exchanger 7 and the subheat exchanger 8 are combined. It is.

The heat exchanger (9) includes a water pipe (1), a plurality of heat transfer fins (2) welded to the outer periphery of the water pipe (1), a cylinder (6) for receiving them, and the cylinder (6). It consists of a gas burner (3) installed in the upper portion of the fan, and a fan (4) for supplying air from the upper portion of the gas burner (3), and consists of an exhaust passage (5) connected to the lower portion of the heat exchanger (9) .

The heat exchanger 9 is divided into a main heat exchanger 7 downstream of the water pipe 1 and a sub-heat exchanger 8 upstream of the water pipe 1 disposed below the water pipe 1.

The water pipe 1 on the side of the main heat exchange unit 7 is formed such that the water pipe 1 is formed in a four-stage configuration by meandering the water pipe 1 of this portion, and each end thereof is the water pipe ( 1) is bent in a meandering shape in two rows or four rows.

On the other hand, the water pipe 1 on the side of the sub-heat exchange part 8 is configured to be bent in a meandering shape in four horizontal rows.

The flame hole portion of the gas burner 3 is set downward, and the main heat exchange portion 7 is provided near the flame formation region.

In addition, the gas burner 3 is forcibly supplied with combustion air by the fan 4, whereby the combustion exhaust of the gas burner 3 is discharged from the main heat exchanger 7 and the sub-heat exchanger 8. After passing through, the gas is discharged to the outside through the exhaust passage 5 formed at the lower side thereof.

The conventional gas combustion device burns the gas burner 3 and supplies tap water through an upstream end of the water supply pipe 1 of the sub-heat exchanger 8, and the combustion exhaust of the gas burner 3 is supplied to the fan 4. It is supplied to the main heat exchange unit 7 and the sub-heat exchange unit 8 and the heat is absorbed by the water passage of these heat exchange unit, the hot water in the downstream end of the water pipe 1 of the main heat exchange unit 7 is hot water is discharged to the outside During the endothermic action, the main heat exchanger 7 absorbs the sensible heat of the combustion exhaust produced mainly by the gas burner 3, and the subheat exchanger 8 mainly generates the combustion heat of the gas burner 3. Condensation of water vapor takes place to absorb latent heat. That is, in the sub-heat exchange part 8, the sensible heat is taken away from the main heat exchange part 7, and the cooled combustion exhaust is cooled below the dew point temperature to generate a drain, and the latent heat at that time is passed through the water pipe 1 of the sub-heat exchange part 8. ) Is absorbed by the water inside. In such a gas combustion device, there is an advantage in that the thermal efficiency is improved by actively absorbing not only the sensible heat generated during combustion exhaust but also latent heat to the heat exchanger, but it is difficult to sufficiently improve the thermal efficiency even in such a conventional gas combustion device.

Since the sensible heat of the combustion exhaust discharged from the gas burner 3 is removed from the main heat exchanger 7, the exhaust temperature when the subheat exchanger 8 reaches the exhaust temperature of the main heat exchanger 7 Since the water is supplied through the water supply pipe 1 on the side of the sub-heat exchange part 8, the water supply pipe 1 has a lower temperature than the part located upstream. Because it becomes.

Therefore, the efficiency (condensation rate) of the combustion exhaust cooling below the dew point is highest on the upstream side of the water pipe 1.

By the way, in such a gas combustion apparatus, the flow distribution of the combustion exhaust of the gas burner 3 supplied by the fan 4 is almost uniform over the whole running area of the water supply pipe 1 in the sub-heat exchange part 7. . That is, the combustion exhaust of a substantially uniform flow rate is sent to the vicinity of the upstream end of the water pipe 1 having the highest condensation heat and its downstream side having a lower heat of condensation.

Therefore, the gas combustion device as described above has the advantage that the thermal efficiency is improved compared to the conventional gas boiler because it actively uses the latent heat of the combustion exhaust, but on the contrary, the thermal efficiency cannot be sufficiently improved.

Because the drain attached to the sub-heat exchange part 7 covers the surface of the water pipe 1 or the heat transfer fin 2 of this portion, and thus, the water pipe 1 and the heat transfer fin 2 and the combustion exhaust This is because the drain coating is formed on the substrate to reduce the heat transfer degree of the portion.

On the other hand, the drain attached to the heat transfer fins 2 and the like moves to the lower end of the heat transfer fins 2 by their own weight, and grows gradually in this state due to the surface tension as drops.

When the water droplets grow to a predetermined size and the weight thereof becomes larger than the adhesion between the water droplets and the heat transfer fins 2, the water droplets fall downward. That is, until the water droplets are grown to a predetermined size, the water droplets are attached to the lower end of the heat transfer fin 2 and are not removed.

Thus, the conventional one is that the drain film generated on the heat transfer fins 2 is not quickly removed from the heat transfer fins 2, so that the splitting efficiency is lowered.

In addition, the conventional gas combustion apparatus as described above is composed of the main heat exchanger and the sub-heat exchanger, so that the size of the heat exchanger is increased, and the work required for assembling the main heat exchanger and the sub-heat exchanger is cumbersome and time consuming. There was a problem.

In addition, in the gas combustion device as described above, the main heat exchange part uses a copper material having high thermal conductivity to absorb sensible heat, and the sub heat exchange part uses a stainless steel material to prevent corrosion by condensate and absorb latent heat. In the case of a heat exchanger made of such dissimilar metals, the manufacturing process of the main heat exchanger was performed, and the manufacturing process of the subheat exchanger was separately performed, and the main heat exchanger and the subheat exchanger had to be combined with each other. The task itself was a difficult problem.

The present invention has been made in order to solve the above problems, the heat exchanger configured to be integrated in the same material to the main heat exchanger for absorbing sensible heat and the sub-heat exchanger for absorbing latent heat on the downstream side of the exhaust flow generated by the gas burner To provide a flag for that purpose.

Further, an object of the present invention is to reduce the size by using an integrated heat exchanger, and to improve thermal efficiency by simultaneously absorbing the sensible heat of the combustion exhaust absorbed in the main heat exchanger and the latent heat absorbed from the combustion exhaust in contact with the sub-heat exchanger. To provide a condensation gas boiler that can be

An object of the present invention is to provide a heat exchanger that can sufficiently improve the thermal efficiency by connecting a plurality of water plate installed.

In addition, an object of the present invention is to provide a heat transfer plate between the heat transfer plate installed in the heat exchanger to improve the corrosion resistance and thermal efficiency, and to be configured to be smaller and lighter than the conventional condensing boiler.

1 is a perspective view showing the structure of a conventional gas combustion device

2 is a perspective view showing a condensation gas boiler having an integrated heat exchanger of the present invention;

3 is a plan view showing an integrated heat exchanger of the present invention.

Figure 4 is a side view showing an integrated heat exchanger of the present invention

5 is a front view showing a heat transfer plate used in the heat exchanger of the present invention.

6 is a plan view of FIG.

7 is a cross-sectional view taken along the line A-A of FIG.

8 is a perspective view showing a heat transfer plate of the present invention

** Explanation of symbols for the main parts of the drawings

10 gas burner 12 heat exchanger

14: heat transfer plate 16: heat transfer plate

18 year 20 condensate outlet

22: inlet 24: outlet

26: Euro

The present invention is a boiler body, a gas burner installed inside the boiler body, and a plurality of water pipes are fitted to the plurality of heat transfer fins are provided in the lower portion of the gas burner formed with a plurality of holes, each welded by a predetermined filler material A main heat exchanger configured to absorb sensible heat of combustion exhaust generated by burning the gas burner; A plurality of heat exchangers comprising a sub-heat exchanger configured to absorb the latent heat of the combustion exhaust cooled through the main heat exchanger by fitting a plurality of water pipes into a plurality of heat transfer fins each having a plurality of holes formed therein and welded by a predetermined filler material. In the conventional condensing gas boiler comprising a, each inlet and outlet is formed, and a plurality of water passages provided with a chamber inside so that the supply water entering the inlet can be installed to connect to each other, wherein Between the plurality of water transfer plate is characterized in that it is provided with an integrated heat exchanger made of a heat transfer plate is installed to absorb the sensible and latent heat at the same time.

The plurality of water passing plates and heat transfer plates are made of the same metal material having corrosion resistance and heat conductivity.

In addition, the plurality of water passing plates and heat transfer plates use stainless steel.

The heat transfer plate installed between the plurality of water transfer plates is formed in a concave-convex shape, and forms a first flow path and a second flow path that absorb sensible and latent heat.

The cutout for forming the second flow path of the heat transfer plate is characterized in that it is formed in one direction or zigzag.

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation of the present invention.

2 is a perspective view showing a condensation gas boiler of the present invention.

And, Figure 3 is a plan view showing the integral heat exchanger of the present invention, Figure 4 is a side view showing the integral heat exchanger of the present invention, Figure 5 is a front view showing a heat transfer plate of the present invention, Figure 6 is a plan view of Figure 5, FIG. 7 is a cross-sectional view when AA of FIG. 6 is cut, and FIG. 8 is a perspective view showing a heat transfer plate of the present invention.

First, referring to the condensation gas boiler of the present invention shown in FIG. 2, the condensation gas boiler 100 transmits a gas burner 10 located above and combustion exhaust by the gas burner 10 (FIG. 2). The heat exchanger 12 for receiving and the flue 18 for absorbing the sensible and latent heat in the heat exchanger 12, and then discharge the remaining exhaust gas.

At this time, the heat exchanger 12 is not separated into a main heat exchanger that absorbs sensible heat and a subheat exchanger that absorbs latent heat, and is formed integrally. That is, having a chamber inside so that water (see the solid line arrow direction in FIG. 2) coming from the inlet 22 formed at one side can be circulated and discharged to the outlet 24 at the other side (see solid line arrow direction in FIG. 2). A plurality of water transfer plates 14 are connected to each other, and a plurality of heat transfer plates 16 are interposed and welded therebetween.

The plurality of water transfer plates 14 applied to the heat exchanger 12 of the present invention configured as described above are made of stainless steel as a main material, and the heat transfer plates 16 are welded and fixed between the water transfer plates 14. It is also made of stainless steel of the same material.

This is because the conventional heat exchanger made of the same material for absorbing the sensible heat and the dissimilar metal of the sub-heat exchanger made of stainless steel having a corrosion-resistant material to absorb the latent heat, it is difficult to form a heat exchanger.

Therefore, the present invention is composed of an integral heat exchanger 12 made of the same material, not a heat exchanger made of dissimilar metals having different materials.

Subsequently, a description will be given with reference to FIGS. 3 and 4.

As described above, the heat exchanger 12 of the present invention is made of stainless steel of the same material as each other, the heat exchanger made of an integral type to simultaneously absorb the sensible heat absorbed by the main heat exchanger and the latent heat absorbed by the sub-heat exchanger ( 12, the uneven heat transfer plate 16 is welded between the water transfer plates 14.

In addition, as shown in Figures 5 to 8, the heat transfer plate 16 of the present invention is made of stainless steel having a predetermined thickness to absorb the latent heat generated during the exhaust of the combustion gas and at the same time the corrosion of the condensate generated It has corrosion resistance so as not to occur, and as shown in FIG. 7 to promote absorption of latent heat, and has a concave-convex shape in which a plurality of concave portions and convex portions are formed, and in air other than heat transferred to the body of the heat transfer plate 16. The first flow path 25 is formed so that sensible heat and latent heat pass through and absorbed.

And, as shown in Figures 5 and 6 and 8, the one side edge of the convex portion is formed to be inclined into the inside, and the other side is formed to be cut out to the other side to the opposite side to be folded out to the outside. As a result, the second flow path 26 is formed to increase the heat transfer surface area so as to efficiently absorb sensible and latent heat.

The heat transfer plate 16 having the above structure integrates the main heat exchange part and the sub heat exchange part, and effectively absorbs sensible and latent heat while preventing corrosion by condensate.

In addition, the heat transfer plate 16 is cut at predetermined intervals to form a second flow path 26 formed by bending inwards and outwards. However, the heat transfer plate 16 is not limited thereto and may be cut in zigzag to form the second flow path 26. have.

The present invention as described above is not limited to the preferred embodiment as described above, those skilled in the art without departing from the spirit of the invention claimed in the claims If various modifications are possible, of course, such modifications will be within the scope of the claims set forth as essential elements of the invention.

As such, the condensation gas boiler of the present invention can be configured to have a heat exchanger integrating the main heat exchanger and the sub-heat exchanger to reduce the size and weight of the boiler, and to simplify the manufacturing operation by reducing the man-hour by more than twice as compared to the existing work process. By improving productivity and absorbing the sensible and latent heat absorbed in the main heat exchanger and the sub-heat exchanger, respectively, in one heat exchanger made of a single body, there is an effect of improving the thermal efficiency.

Claims (5)

delete delete delete A boiler body; A gas burner installed inside the boiler body; A plurality of water pipes are fitted to the plurality of heat transfer fins formed in the lower part of the gas burner and formed with a plurality of holes, and welded by a predetermined filler material to absorb sensible heat of combustion exhaust generated by burning the gas burner. Two stages with a heat exchanger and a sub-heat exchanger configured to absorb a latent heat of the combustion exhaust cooled through the main heat exchanger by inserting a plurality of water pipes into a plurality of heat transfer fins each having a plurality of holes and welded by a predetermined filler material. A condensation gas boiler comprising a heat exchanger having a structure; The heat exchanger is formed by connecting a plurality of water flow plates having a chamber therein so as to be connected to each other in parallel with each other, in which an inlet and an outlet are formed at one side and a supply water introduced into the inlet can be discharged through the outlet. Heat transfer plates are inserted between the water transfer plates so as to absorb sensible and latent heat at the same time. The heat transfer plate has a concave-convex shape, the heat exchanger of the condensing gas boiler, characterized in that the first flow path and the second flow path to the sensible and latent heat is formed. The method of claim 4, wherein The second flow path of the heat transfer plate integral heat exchanger of the condensation gas boiler, characterized in that the heat transfer plate is formed by forming a cutout in one direction or zigzag form.