KR100747000B1 - Heat exchanger and condencing boiler involving the same - Google Patents

Abstract

A heat exchanger and a condensing boiler using the same are provided to improve heat efficiency of the heat exchanger and the condensing boiler by allowing the combustion gas generated from a burner to uniformly flow into a plurality of flues and to thereby make temperature distribution in the flues uniform. A heat exchanger(100) includes a burner arranged on a central axis(X1); a combustion chamber(10) having a space for accommodating the burner; a plurality of flues(21,22,23) which have ends corresponding to through holes of a lower plate(60) such that the flues are substantially parallel to the central axis and combustion gas generated from the burner flows into the flues; and an outer shell(30) which forms a chamber(80) between with the flues and accommodates the flues. The length of each flue increases in proportion to the distance from the central axis such that the distance between the top of each flue and the burner is constant.

Description

Heat Exchanger And Condencing Boiler Involving The Same

1 is a cross-sectional view showing a preferred embodiment of a heat exchanger according to the present invention.

Figure 2 is a sectional view showing a preferred embodiment of the boiler to which the heat exchanger according to the present invention is applied.

3 is a configuration diagram of a latent condensation recovery boiler according to the present invention.

<Brief description of the major symbols in the drawings>

10 ......... combustion chamber 20 ........... association

30 .............. Outer 40 ....... Exhaust hood

50 ....... Top plate 60 ....... Bottom plate

70 ....... Hot water coil 80 ......... Chamber

90 ......... Exhaust Pipe 100 ...... Heat Exchanger

X1 ............. Center shaft M ......... fan drive motor

I ............. Blower E ............. Floor

B ............... Burner

The present invention relates to a heat exchanger provided in a boiler and a latent condensation recovery boiler comprising such a heat exchanger, that is, a heat exchanger provided in a condensing boiler.

The boiler is configured to heat hot water and heating water by exchanging hot combustion gases with low temperature water. In particular, condensing boilers have a temperature at which the combustion gas is exhausted after exhausting heat exchange to exhaust the dew point of water to increase the thermal efficiency of the boiler, so that the latent heat of steam contained in the combustion gas can be recovered. It is composed.

On the other hand, the heat exchanger of the boiler as described above, the outer shell, a combustion chamber disposed inside the shell, a plurality of associations arranged to communicate with the combustion chamber inside the shell, a chamber formed in the space between the association and the combustion chamber, It is configured to include a hot water coil disposed in the chamber surrounding the plurality of associations. The chamber is supplied with heating water to be heat-exchanged, and the combustion gas generated in the burner chamber exchanges heat with the heating water while passing through the pipe to increase the temperature of the heating water, while increasing the temperature of the hot water inside the hot water coil. It is raised and then exhausted.

Therefore, in order to facilitate the heat exchange occurring in the heat exchanger, the combustion gas should be introduced evenly into the plurality of associated pipes. However, in the conventional heat exchanger, the distance between the position where the combustion gas is generated and the respective association is not constant, so that more combustion gas is introduced into the association relatively close to the position where the combustion gas is generated, and the combustion gas is generated. In a relatively far away position, fewer combustion gases were introduced, and combustion gases were not evenly introduced into the plurality of associations, resulting in an uneven distribution of temperature inside the heat exchanger.

In order to solve the problems of the prior art as described above, the plurality of associated combustion gas inlets are fixed from the burner so that the combustion gas generated in the burner disposed in the combustion chamber can be evenly introduced into the plurality of associated interiors. It is an object to provide a heat exchanger configured to be a distance, thereby increasing the thermal efficiency of the heat exchanger and the boiler.

Heat exchanger for achieving the object of the present invention as described above burner disposed on the central axis; A combustion chamber forming a space for accommodating the burner; A plurality of associations, one end of which is formed corresponding to the through hole formed in the lower hard plate so as to be substantially parallel to the central axis, to which combustion gas generated in the burner flows; And a shell for accommodating the association while forming a chamber between the association, wherein the plurality of association lengths are associated with the plurality of associations such that a straight line distance between the plurality of association tops and the burner is constant. And increase in proportion to the distance between the central axes.

"Chamber" in the context of the present invention refers to a space containing the water to be heat exchanged with the combustion gas, the space between the shell and the combustion chamber or shell and the associated.

Preferably, the shell is configured to receive the combustion chamber and the association so as to form a chamber also with the combustion chamber.
The latent condensation recovery boiler according to the present invention comprises: a burner disposed above the central axis; A combustion chamber forming a space for accommodating the burner; A plurality of associations, one end of which is formed corresponding to the through hole formed in the lower hard plate so as to be substantially parallel to the central axis, to which combustion gas generated in the burner flows; An outer shell for receiving the association while forming a chamber between the association; An exhaust hood formed to be in communication with one end of the association; A drainage device connected to the exhaust hood and configured to discharge condensate; A through-hole formed so that the burner penetrates, and an outer circumference is coupled to an upper end of the outer shell to close the upper end of the outer shell; A plurality of openings are formed so as to correspond to one end of the association, the outer periphery is coupled to the lower end of the outer shell including a lower plate for closing the lower end of the outer shell, wherein the plurality of associated upper and the straight line of the burner The plurality of associative lengths are configured to increase in proportion to the distance between the plurality of associations and the central axis so that the distance is constant.

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Preferably, it is further configured to further comprise an exhaust pipe connected to the exhaust hood and provided for exhausting the combustion gas and an exhaust fan forcibly discharging the combustion gas of the exhaust pipe.

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Preferably, the bottom surface of the exhaust hood is configured to be inclined toward a portion connected with the drainage device.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the heat exchanger and the latent heat recovery boiler according to the present invention.

1 is a cross-sectional view showing a preferred embodiment of a heat exchanger according to the present invention, Figure 2 is a cross-sectional view showing a preferred embodiment of a boiler to which the heat exchanger according to the present invention is applied, Figure 3 is a latent heat recovery of condensation according to the present invention A diagram of the boiler.

Heat exchanger 100 according to the present invention is preferably configured in a cylindrical shape around the central axis (X1) in the vertical direction, the burner is mounted on the central axis (X1). Since it is obvious to those skilled in the art, detailed description thereof will be omitted.

Under the vertical direction of the combustion chamber, a plurality of pipes 20 are arranged to be substantially parallel to the central axis X1. The tube 20 is typically manufactured in the shape of a pipe with a hollow.

At this time, an opening is formed at one end of the tube 20 so that combustion gas inside the combustion chamber 10 can flow into the tube 20. Meanwhile, an opening is formed at the other end of the tube so as to correspond to the lower plate 60 so that the heat-exchanged combustion gas may flow into the exhaust hood 40.

The combustion chamber 10 and the plumbing 20 are received by the shell 30 of the heat exchanger 100. The sheath 30 has a predetermined spaced space to accommodate the associative 20 and the combustion chamber 10, wherein the spaced space is the chamber 80. As described above, the chamber 80 includes water to be heat-exchanged with the combustion gas. As illustrated in FIG. 1, low-temperature water flows in through the heating return port 31, and the combustion gas in the pipe 20 is disposed. After the heat exchange with the high temperature flows into the heating supply port 33 is used for heating.

In the related art, a separate chamber 80 was not formed between the combustion chamber 10 and the shell 30, but a chamber 80 was also formed between the shell 30 and the combustion chamber 10 to increase the heat exchange rate, thereby exchanging heat exchange efficiency. It is preferable to configure so as to increase.

As shown in FIG. 1 or 3, it is preferable that a hot water coil 70 is disposed in the chamber 80 so as to surround the outside of the pipe 20 and the combustion chamber 10. The hot water coil 70 may also be disposed. Water to be heat-exchanged with the combustion gas is disposed, the low-temperature water flows into the cold water supply port 73 formed at one end of the hot water coil, and the water that has become hot by heat exchange with the combustion gas is formed at the other end of the hot water coil. Outflow to the heating supply port 33 is used as hot water. On the other hand, the lower portion of the outer shell 30 is closed except for the opening for discharging the exhaust gas after the heat exchange by the lower plate 60 described above, the upper portion is a through hole through which the burner penetrates by the upper plate (50) Except for being closed is configured so that the water inside the chamber 80 does not leak.

The heat exchanger according to the present invention has a close relationship with the central axis (X1) centered on the central axis (X1) in which the burner is arranged, in particular, a plurality of associations are conventionally arranged to have the same length (21, 21) ') Has a shorter length than the associated axis 22, 22', 23, 23 ', which is far from the central axis X1, so that the length of the tube 20 differs around the central axis X1. It is composed.

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In this configuration, the distance from the burner B disposed on the central axis X1 of the respective associations to the combustion gas inlet of the association 20 is constant, so that the distance from each conventional burner to each association is not constant. In other words, more combustion gas is introduced in an association relatively close to the location where the combustion gas is generated, and less combustion gas is introduced in an association that is relatively far from the location where the combustion gas is generated, whereby a plurality of combustion gases are introduced. By not evenly flowing into the tube, the problem of uneven distribution of the temperature distribution inside the heat exchanger is solved, and thus the problem of lowering the efficiency of heat exchange can be solved.

Hereinafter, a preferred embodiment of the latent condensation recovery boiler according to the present invention will be described with reference to FIGS. 1 to 3.

One end of the exhaust pipe 90 is connected to the connecting portion 41 formed at one side of the exhaust hood 40, and the other end of the exhaust pipe 90 is connected to the exhaust fan E. On the other hand, the burner (B) is formed so as to be on the central axis (X1), and the blower (B) is formed in the burner (B) so that outside air flows into the burner (B). Preferably, these blowers I and the blowers E are preferably configured to have a fan driven by a single motor M, as shown in FIG. It is disclosed in detail in 2002-0090432. On the other hand, the blower (I) and the exhaust fan (E) may be configured to separate as shown in FIG.

In the latent condensation recovery boiler, the exhaust fan (E) has not been separately configured. In particular, in the latent condensation recovery boiler, since the exhaust gas temperature exhausted from the exhaust fan (E) becomes below the dew point of the water, the fan is not shown. This is because there was a problem of being corroded. Therefore, the fan and the drive shaft (not shown) of the air blower are preferably made of a metal having high corrosion resistance such as stainless steel. On the other hand, if the exhaust fan (E) in the condensation latent heat recovery boiler in this way, it is possible to further increase the heat exchange efficiency in the heat exchanger because the exhaust gas is smoothly discharged.

On the other hand, as described above, since the exhaust gas temperature of the condensation latent recovery boiler is equal to or lower than the dew point of the water, the liquid hood and the gaseous exhaust gas are simultaneously present in the exhaust hood 40. At this time, as described above, the gaseous exhaust gas is discharged to the outside through the exhaust pipe, and the liquid water is configured to be discharged to the drain hole 43 formed at one end of the exhaust hood 40. On the other hand, to smoothly withdraw water, as shown in Figure 3, the bottom surface 41 of the exhaust hood 40 is preferably configured as a slope so that the lowest point is formed in the drain hole (43).

The drain hole 43 is usually connected to the drainage device 45, which is configured as a siphon (Siphon) device as shown in FIG. 3, or condensate that is configured to store condensate and allow the user to selectively discharge it. It can be configured as a trap and can be configured in a variety of known ways to discharge condensed water.

Referring to the overall operation of the condensation latent recovery boiler according to the present invention, the gas fuel is supplied to the burner (B) through the governor (G; Governor), the fuel supplied is mixed with the outside air introduced from the blower (I) do. When burner B is operated to generate combustion gas, the generated combustion gas flows into combustion tube 10 from combustion chamber 10, and inside water or hot water coil 70 inside chamber 80 formed around the tube. Heat exchange with water. The heat-exchanged combustion gas flows into the exhaust hood 40, the latent heat of condensation is recovered, and water vapor in the exhaust gas is liquefied and discharged to the drainage device 45 connected to the drain hole 43. The exhaust fan (E) is discharged to the outside through the exhaust pipe (90). On the other hand, the water supplied to the chamber 80 flows in through the heating return port 31, flows out through the heating outlet 33, is sent to each heating target point by the pump (P), the chamber 80 Water disposed in the hot water coil 70 flows in through the cold water supply port 73 and flows out to the hot water supply port 71.

On the other hand, the temperature of the water and heating water in the boiler is usually 20 ℃ to 80 ℃ temperature changes, and the volume is expanded in accordance with the temperature change of the water, so to prevent pipe destruction by expanded water, etc. It is preferable to further include the expansion water receiving tank (C) of the pipe as shown in FIG. In addition, when hot water used for bathing water and heating water used to heat a room are mixed, the hot water may be contaminated and difficult to use as bath water. Therefore, the boiler may prevent hot water from mixing with the hot water. It is preferable to further include a three-way valve (W) in the piping as shown in FIG. 3 so as to control the flow of water when operating for warming purposes and when operating for heating water.

Although the preferred embodiment of the heat exchanger according to the present invention and the condensation latent heat recovery boiler to which such a heat exchanger is applied has been described with reference to the accompanying drawings, the scope of the present invention should not be construed as being limited to the embodiments.

In addition, the scope of the claims to be described later should be construed to extend not only to the invention substantially the same as the invention described in the claims, but also to the invention in which some components are replaced with equivalents.

According to the present invention, since the combustion gas generated in the burner is evenly introduced into the plurality of associated pipes, the temperature distribution of the plurality of pipes is evenly distributed, thereby increasing the thermal efficiency of the heat exchanger and the condensation latent heat recovery boiler using the same.

Claims (7)

A burner (B) disposed above the central axis (X1); Combustion chamber 10 to form a space for accommodating the burner (B); One end portion is formed to correspond to the through hole formed in the lower plate 60 to be substantially parallel to the central axis (X1), a plurality of associations (21, 22) into which the combustion gas generated in the burner (B) flows in , 23, 21 ', 22', 23 '); The associations 21, 22, 23, 21 ′, 22 ′, 23 ′ are formed while forming a chamber 80 between the associations 21, 22, 23, 21 ′, 22 ′, 23 ′. Including outer shell 30 to receive, The plurality of associations 21, 22, 23, 21 ′, 22 ′ such that a straight line distance between the upper ends of the plurality of associations 21, 22, 23, 21 ′, 22 ′, 23 ′ and the burner B is constant. , 23 ') length increases in proportion to the distance between said plurality of associations (21, 22, 23, 21', 22 ', 23') and said central axis (X1). According to claim 1, wherein the shell 30 forms a chamber between the combustion chamber 10 and the combustion chamber 10 and the association (21, 22, 23, 21 ', 22', 23 '). Heat exchanger, characterized in that it is adapted to receive. A burner (B) disposed above the central axis (X1); Combustion chamber 10 to form a space for accommodating the burner (B); One end portion is formed to correspond to the through hole formed in the lower plate 60 to be substantially parallel to the central axis (X1), a plurality of associations (21, 22) into which the combustion gas generated in the burner (B) flows in , 23, 21 ', 22', 23 '); The associations 21, 22, 23, 21 ′, 22 ′, 23 ′ are formed while forming a chamber 80 between the associations 21, 22, 23, 21 ′, 22 ′, 23 ′. An outer shell 30 for receiving; An exhaust hood 40 formed so as to be able to communicate with one end of the association 21, 22, 23, 21 ′, 22 ′, 23 ′; A drainage device 45 connected to the exhaust hood 40 to discharge condensate; A through hole is formed so that the burner (B) penetrates, the outer periphery is coupled to the upper end of the outer shell 30 to close the upper end of the outer shell 30 (50); A plurality of openings are formed to correspond to one end of the association 21, 22, 23, 21 ′, 22 ′, 23 ′, and an outer circumference is coupled to a lower end of the sheath 30 so that the sheath 30 is formed. Including a lower hard plate 60 to close the bottom of the, The plurality of associations 21, 22, 23, 21 ′, 22 ′ such that a straight line distance between the upper ends of the plurality of associations 21, 22, 23, 21 ′, 22 ′, 23 ′ and the burner B is constant. , 23 ') the length is increased in proportion to the distance between the plurality of associated (21, 22, 23, 21', 22 ', 23') and the central axis (X1). delete delete The method of claim 3, An exhaust pipe 90 connected to the exhaust hood 40 for providing combustion gas; And The latent condensation recovery boiler, characterized in that it further comprises an exhaust fan for forcibly discharging the combustion gas of the exhaust pipe (90). The method of claim 3, The bottom surface of the exhaust hood (40) is a latent condensation recovery boiler, characterized in that inclined toward the portion connected to the drainage (45).

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