KR100570286B1 - Heat exchanger - Google Patents

Abstract

The present invention relates to a heat exchanger used in a gas boiler or a hot water heater, and the present invention relates to a combustion chamber cover having a combustion chamber formed therein, a heat exchanger and a burner provided at upper and lower portions of the combustion chamber, and an outer wall surface of the combustion chamber cover. In the heat exchanger having a water pipe wound multiple times, the heat insulating material is provided on the inner wall of the combustion chamber cover, the outer wall of the combustion chamber cover is characterized in that the outer cover is provided.

Therefore, the present invention can prevent the heat loss emitted to the outside through the combustion chamber cover from the combustion chamber, the outer cover is provided on the outer wall of the combustion chamber cover, it is possible to safely protect the user and the like from high temperature, as well as the heat exchanger It can be beautiful in appearance.

Gas boiler, heat exchanger, combustion chamber cover, insulation, exterior cover

Description

Heat Exchanger

1 is a view showing the configuration of a gas boiler to which a conventional wet heat exchanger is applied;

2 is an exploded perspective view showing a state in which a heat insulating material and an outer cover are respectively provided on the inner wall and the outer wall of the combustion chamber cover in the heat exchanger according to the present invention;

3 is a combined perspective view of the heat exchanger shown in FIG. 2 according to the present invention;

Figure 4 is a cross-sectional view showing a coupling state of the heat exchanger shown in Figure 3 according to the present invention.

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

1: combustion chamber cover 1a: combustion chamber

1b, 2b, 6a: mounting groove 1c: protrusion

2: exhaust duct 2a: exhaust port

3: water pipe 4: heat exchanger

4a: tube 4b: heating fin

5: heat insulating material 6: exterior cover

7 connector 8 packing material

The present invention relates to a heat exchanger used in a gas boiler or a hot water heater, and more particularly, in a wet heat exchanger applied to a gas boiler or a hot water heater, by arranging an insulating material inside the combustion chamber cover and arranging an exterior cover on the outside thereof. The present invention relates to a heat exchanger that protects users while preventing heat loss to the outside of a combustion chamber.

Boilers commonly used for heating and hot water supply in homes can be divided into oil boilers and gas boilers, depending on the fuel used.

Gas boilers use liquefied petroleum gas (LPG) as a raw material, but since they contain little sulfur compared to diesel or kerosene, most LNG is used as a clean fuel to minimize air pollution.

Gas boilers can be divided into various types according to the control method or the sealed state, and can be divided into condensing and non-condensing types according to the heat source for heating the heating water.

Among them, the condensing method has a sensible heat exchanger that directly heats the heating water by using the heat burned by the burner, and a latent heat exchanger that heats the heating water by using latent heat of exhaust gas passing through the sensible heat exchanger. In the non-condensing method, only the sensible heat exchanger is provided.

In addition, in the heat exchanger of the gas boiler, it can be classified into a dry type heat exchanger (Dry Type Heat Exchanger) and a wet type heat exchanger (Wet Type Heat Exchanger) by a conventional classification method.

In the case of the wet heat exchanger, the outer wall of the heat exchanger is wound several times in the form of a heat exchanger inlet tube or a return tube to prevent overheating and auxiliary heat exchange of the heat exchanger body. Finishing with a heat insulating material such as asbestos to block the heat dissipation to the outside, to achieve the heat insulating effect.

A gas boiler employing a conventional wet heat exchanger is shown in FIG. 1.

As shown in FIG. 1, a gas boiler to which a conventional wet heat exchanger is applied has a combustion chamber cover 10 forming an appearance and an exhaust gas guide plate 20 provided on an upper portion of the combustion chamber cover 10.

The combustion chamber cover 10 generally has a rectangular box shape, and a combustion chamber 10a is formed in the combustion chamber cover 10.

At this time, a gas burner 22 which is operated by a fuel such as city gas to generate a flame is provided at a lower portion of the combustion chamber 10a, and a heat exchanger 24 is provided at an upper portion of the combustion chamber 10a.

And, one side of the combustion chamber cover 10 is provided with a return pipe 12 for returning water from a heating and hot water pipe (not shown), the hot water heated by the water pipe 30 and the heat exchanger 24 is again heated and hot water The supply pipe 14 supplied to piping is provided.

An exhaust gas discharge hole 20a through which the exhaust gas generated by the gas burner 22 is discharged to the outside is formed in the exhaust gas guide plate 20 provided on the combustion chamber cover 10.

The heat exchanger 24 performs a second heat exchange process of warming cold water with hot water by the gas burner 22 together with the water pipe 30.

A connection pipe 26 is coupled to the heat exchanger 24, and one end of the connection tube 26 is coupled to the heat exchanger 24, and the other end thereof is exposed to the outside of the combustion chamber cover 10.

On the other hand, between the connection pipe 26 and the return pipe 12 exposed to the outside of the combustion chamber cover 10 is provided with a water pipe 30 whose both ends are in communication with the connection pipe 26 and the return pipe 12, respectively. have.

The water pipe 30 performs a primary heat exchange process for warming cold water with hot water by the gas burner 22.

As described above, in the gas boiler to which the wet heat exchanger is applied, the water pipe 30 is wound in the annular shape a plurality of times along the outer wall surface circumferential direction of the combustion chamber cover 10 as shown.

Therefore, the water pipe 30 is wound on the outer wall surface of the combustion chamber cover 10, so that the heat dissipated to the outside is absorbed through the water pipe, and as a result, its heat transfer area with respect to the heat of combustion of the gas burner 22 increases. There is an effect that will be able to increase the heat exchange efficiency more.

By such a configuration, when the cold water flows into the combustion chamber cover 10 through the return pipe 12 while the gas burner 22 is operated, the introduced water is provided in the outer wall surface of the combustion chamber cover 10. The primary heat exchange process is performed due to the increased heat transfer area in the course of flow along the interior of 30.

The water in which the first heat exchange process is performed is subjected to the second heat exchange process toward the heat exchanger 24 through the connecting pipe 26.

Therefore, the heat exchange efficiency of the heat exchanger 24 alone can be significantly increased compared to a conventional gas boiler that performs a heat exchange process, and the temperature of the combustion chamber cover 10 is unnecessarily increased through the water pipe 30. You can stop it.

However, in the case of the gas boiler to which the wet heat exchanger is applied, the heat dissipation loss is reduced only by the water pipe 30 wound on the outer wall of the combustion chamber cover 10, so that the outer cover and the inner heat insulating material are relatively separate with the water pipe. It can be said that a greater heat dissipation loss than when provided with.

In particular, since the water pipe 30 and the combustion chamber cover 10 are exposed to the outside, when the gas boiler is operated, there is a risk of burns in case of inadvertent contact with the combustion chamber cover 10 heated to a high temperature by combustion. There was a problem of high.

In addition, since the water pipe 30 has a configuration in which the outer wall of the combustion chamber cover 10 is wound several times, the external appearance of the heat exchanger is not beautiful.

The present invention has been made to improve the problems as described above, the object of the present invention is to provide a heat insulating material inside the combustion chamber cover of the heat exchanger to which a wet heat exchanger is applied, and a separate exterior cover outside the combustion chamber cover wrapped with a water pipe. Therefore, to provide a heat exchanger that can reduce heat loss, protect the user safely and beautiful appearance.

An object of the present invention as described above is a heat exchanger having a combustion chamber cover having a combustion chamber therein, a heat exchanger and a burner provided at upper and lower portions of the combustion chamber, and a water pipe wound on the outer wall surface of the combustion chamber cover a plurality of times. In one embodiment, the inner wall of the combustion chamber cover is provided with a heat insulating material, the outer wall of the combustion chamber cover is achieved by providing a heat exchange device characterized in that the outer cover is provided with an outer cover.

At this time, a plurality of protrusions protruding from the four sides of the upper side of the combustion chamber cover is formed, so that the insulating layer is mounted on the basis of the protrusions, the air layer due to the separation interval between the inner wall of the combustion chamber cover and the insulating material is formed. desirable.

Hereinafter, an embodiment of a heat exchanger according to the present invention will be described with reference to FIGS. 2 to 4.

Figure 2 is an exploded perspective view showing a state in which the heat insulating material and the outer cover are provided on the inner wall and the outer wall of the combustion chamber cover according to the present invention, Figure 3 is a combined perspective view of the heat exchanger shown in Figure 2 according to the present invention, 4 is a cross-sectional view showing a bonding state of the heat exchanger shown in FIG. 3 according to the present invention.

As shown, the heat exchange apparatus according to the present invention includes a combustion chamber cover 1 for forming a combustion chamber 1a therein, and an exhaust duct 2 provided at an upper portion of the combustion chamber cover 1 and provided with an exhaust port 2a. Has

Here, an unillustrated burner which is operated by a fuel such as city gas to generate a flame is provided under the combustion chamber 1a formed therein by the combustion chamber cover 1.

The water pipe 3 is wound around the outer wall surface circumferential direction of the combustion chamber cover 1 in a plurality of times, and between the combustion chamber cover 1 and the exhaust duct 2, that is, the upper portion of the combustion chamber 1a. A heat exchanger 4 having a plurality of stages is mounted to the heat exchanger 4.

In this case, seating grooves 1b and 2b may be provided at both upper corners of the combustion chamber cover 1 and the lower corners of the exhaust duct 2 to fit the heat exchanger 4.

The heat exchanger (4) is a tubular tube (4a: Tube) in which water is circulated inside and arranged side by side and connected by a U-shaped connecting pipe (7), the heat transfer area on the outside of the tube (4a) A plurality of fins 4b extending radially outward from the plate surface are provided to widen the gap.

At this time, the heat transfer fins 4b are formed to increase the heat transfer area through direct contact with combustion heat and exhaust gas.

The water pipe 3 and the heat exchanger 4 are connected to each other to circulate the heating water.

In particular, the combustion chamber cover 1 is generally formed in a rectangular box shape, but in the present invention, by forming a curved surface to have a semi-circular shape of the four corner portions of the combustion chamber cover 1, the combustion chamber cover 1 is formed on the outer wall of the combustion chamber cover 1. When the water pipe 3 is wound up, it can be assembled more easily.

And, one side of the combustion chamber cover (1) is connected to the water pipe (3) is provided with a non-illustrated return pipe for the water is returned from the heating and hot water pipe, the other side of the hot water heated by the heat exchanger (4) A supply pipe, not shown, may be provided to be supplied to the heating and hot water pipe again.

The exhaust port 2a of the exhaust duct 2 serves to discharge the exhaust gas generated in the process of burning by a burner (not shown) to the outside, and the exhaust port 2a is connected to a communication (not shown) to exhaust gas. Can be discharged to the outside.

In addition, a packing material 8 is inserted into the contact surface of the combustion chamber cover 1 and the exhaust duct 2 to be separately assembled to prevent corrosion problems between dissimilar metals from the contact surface.

Looking at the effect of the heat exchanger having such a configuration, the burner (not shown) in the combustion chamber (1a) starts the combustion to generate the heat of combustion and at the same time the water required for heating or providing hot water through the return pipe (not shown) The first heat exchange process is introduced into the water pipe (3) surrounding the outer wall of the combustion chamber cover 1, and the water thus introduced flows out of the combustion chamber (1a) during the flow along the inside of the water pipe (3). This is done.

Then, the water subjected to the first heat exchange process is performed toward the heat exchanger 4 connected to the water pipe 3, and the second heat exchange process is performed.

At this time, the heat exchanger 4 in the process of the secondary heat exchange process is performed by the heat transfer area is increased due to the tube 4a and the plurality of heat transfer fins (4b, fin) formed on the plate surface of the tube (4a) The efficiency is significantly higher.

Then, the heat exchanged by the water pipe (3) and the heat exchanger (4), respectively, is directed to the heating and hot water pipe through a supply pipe not shown.

Thus, the configuration and action as described above is a configuration that can be found easily in the heat exchanger to apply a conventional wet heat exchanger.

According to the present invention, in the heat exchanger having such a configuration, the inner wall of the combustion chamber cover 1 receives considerable heat and pressure during combustion of the burner, and this heat and pressure shorten the life of the combustion chamber cover 1, as well as In order to improve the problem that the internal heat is released to the outside to reduce the thermal efficiency.

That is, the present invention is characterized in that in the heat exchanger having the configuration as described above, the inner wall of the combustion chamber cover (1) is provided with a heat insulating material (5) and at the same time the outer cover on the outer wall of the combustion chamber cover (1) (6) is provided.

The heat insulator 5 serves to prevent heat loss by insulating as much as possible the heat released outside the combustion chamber while being able to withstand high temperatures.

At this time, since the heat insulating material 20 is preferably provided on the entire inner wall of the combustion chamber cover 1, the heat insulating material 20 is installed on the inner wall of the combustion chamber cover 1 in the same area and almost the same structure as the combustion chamber cover 1.

In particular, in the present invention, in installing the heat insulator 5 on the inner wall of the combustion chamber cover 1, the heat insulator 5 is installed so as to be spaced apart from the inner wall of the combustion chamber cover 1 by a predetermined distance (h).

This is to form an air layer between the combustion chamber cover (1) and the heat insulating material (5), so that the high temperature heat insulating material (5) is the primary heat insulation and at the same time the secondary heat insulation in the air layer according to the space (h) space. In addition, by reducing the area in direct contact between the heat insulator 5 and the combustion chamber cover 1, the heat insulator 5 functions as a heat insulator while heat is sucked into the combustion chamber cover 1 by conduction through direct contact. This is to prevent excessive transmission.

To this end, a plurality of protruding protrusions 1c protruding inwardly at predetermined intervals are provided on all four edge surfaces of the combustion chamber cover 1.

That is, the protruding protrusion 1c serves to space (h) the gap between the combustion chamber cover 1 and the heat insulating material 5 by a predetermined distance, and the heat insulating material 5 may be installed inside the combustion chamber cover 1. At this time, since the protruding protrusion 1c is disposed on the basis, the heat insulating material 5 surrounding all sides of the combustion chamber cover 1 may be disposed to maintain the same distance as the combustion chamber cover 1.

In addition, the exterior cover 6, which is another feature of the present invention, has a structure surrounding the entire water pipe 3 wound on the outer wall of the combustion chamber cover 1, and the exterior cover 6 is the combustion chamber like the heat insulating material. It is preferable that it is the same shape as the cover 1.

That is, a plurality of seating grooves 6a corresponding to the seating grooves 1b provided at both top corners of the combustion chamber cover 1 are provided at both top corners of the exterior cover 10 to allow the heat exchanger to be seated. have.

In particular, the exterior cover 6 can absorb a certain amount of heat emitted from the combustion chamber through the combustion chamber cover 1 using a metal material, and isolates the exterior of the combustion chamber cover 1 from the user so that the user can safely use it. At the same time, the exterior of the combustion chamber cover 1 and the water pipe 3 wound on the outer wall of the combustion chamber cover 1 are not exposed to the outside, thereby making the appearance beautiful.

That is, even though the heat radiated to the combustion chamber cover 1 through the heat insulator 5 is prevented as much as possible, the high temperature combustion heat of the combustion chamber 1a may be discharged to the outside through the combustion chamber cover 1 to some extent. The water pipe 3 wound on the outer wall of the combustion chamber cover 1 absorbs heat and thus heat exchanges the first time to minimize heat loss, and at the same time block heat emitted from the exterior cover 6 to further prevent heat loss. It is.

In particular, in the case of the exterior cover 6, since the heat absorbed relatively little, the surface temperature of the exterior cover 6 is remarkably dropped, so that the risk of burns may be reduced even if the user inadvertently contacts.

Here, reference numeral 9, which is not described, illustrates a fire monitoring window capable of monitoring the fire power through the outer cover 6.

Meanwhile, in the above-described embodiment, the non-condensing type heat exchanger equipped with a heat exchanger capable of absorbing sensible heat has been described as an example. However, the present invention is not limited thereto, and latent heat from exhaust gas is applied to an upper portion of the heat exchanger that absorbs sensible heat. Of course, the present invention can be applied to a condensing heat exchanger having a latent heat exchanger capable of absorbing heat.

As described above, the heat exchange apparatus according to the present invention can reduce the heat loss emitted to the outside of the combustion chamber through the combustion chamber cover by having a water pipe wound on the outer wall of the combustion chamber cover functioning as the combustion chamber and having an insulation on the inner wall thereof. Has the effect.

In addition, the heat exchange apparatus according to the present invention includes an outer cover that surrounds the water pipe wound on the outer wall of the combustion chamber cover, thereby reducing heat loss to the outside of the combustion chamber and protecting the user and the like from high temperature safely, and the appearance of the heat exchange apparatus. There is an effect that can be beautiful.

Claims (3)

A heat exchanger having a combustion chamber cover having a combustion chamber formed therein, a heat exchanger and a burner provided at upper and lower portions of the combustion chamber, and a water pipe wound around the outer wall surface of the combustion chamber cover, Insulation material is provided on the inner wall of the combustion chamber cover, the heat exchanger characterized in that the outer wall of the combustion chamber cover surrounding the water pipe is provided. The method of claim 1, A plurality of protrusions protruding from the four sides of the upper side of the combustion chamber cover is formed so that the insulating layer is mounted on the basis of the protrusions, so that an air layer is formed between the inner wall of the combustion chamber cover and the insulating material. Heat exchanger made. The method according to claim 1 or 2, And forming a curved surface to form a semicircular shape of the four corner portions of the combustion chamber cover, so as to easily assemble the water pipe on the outer wall of the combustion chamber cover.

Images