KR20100007417A - Cooling structure for combustion chamber of boiler - Google Patents

Abstract

PURPOSE: A cooling structure for a combustion chamber of a boiler is provided to improve thermal efficiency even if generation of condensate is maximally controlled. CONSTITUTION: A cooling structure for a combustion chamber of a boiler is composed as follows: A combustion chamber is formed inside of an inner structure(110). A medium receiving space(120b) for accepting heat transfer medium is formed in an outer structure(120). A cover(130) covers an opening of the outer structure. An adapter(150) coupled to the cover connects cooling pipes(140) with a heating pipe. A floor plate(160) forms a floor of the combustion chamber. A water level sensor(170) and a water supply valve(180) are installed in the outer structure. The water level sensor senses the water level of the heat transfer medium.

Description

Cooling structure of boiler combustion chamber {COOLING STRUCTURE FOR COMBUSTION CHAMBER OF BOILER}

The present invention relates to a combustion chamber cooling structure of a boiler, and more particularly, to a combustion chamber cooling structure of a boiler that can absorb the heat radiated through the outer wall of the combustion chamber.

In general, a boiler heats water by using combustion heat generated during combustion of a fuel and circulates the heated water along a pipe to be used for indoor heating or hot water.

1 is a schematic view showing a schematic configuration of a general heating / hot water combined gas boiler.

When the heating mode is activated, the circulation pump 10 is operated to transfer the heating water. The transported water is heated by heat exchange in the combustion heat of the burner 12 and the main heat exchanger 11, and is transferred to each chamber in which heating is required via the three-way valve 15.

Heating return in which the temperature is lowered by heating in each chamber is reheated in the main heat exchanger 20 through the expansion tank 17 and the circulation pump 10. The combustion chamber 13 is enclosed to the outer side of the burner 12, and hot combustion gas rises to the upper side main heat exchanger 11 side.

Reference numeral 14 denotes a blower, 16 denotes a hot water supply heat exchanger, respectively.

As described above, in order to use the gas boiler 1 for indoor heating or hot water supply, a burner 12 is provided in the combustion chamber 13 so that high temperature thermal energy is generated by combustion of fuel.

In this case, when the high temperature heat energy generated inside the combustion chamber 13 is transferred to the outside of the combustion chamber 13, heat damage is caused to the peripheral devices of the combustion chamber 13, so that an apparatus for cooling the combustion chamber 13 is necessary to prevent this. do.

FIG. 2 is a cross-sectional view illustrating a dry type combustion chamber cooling structure using an insulating material on an inner wall of a combustion chamber housing as one embodiment of a combustion chamber cooling structure of a conventional boiler.

In the center of the combustion chamber (2) is located a burner (12) for mixing and mixing the gas and air introduced, the outer wall of the combustion chamber (2) is composed of a combustion chamber housing (21), the inner wall of the combustion chamber housing (21) The heat insulating material 25 is attached.

The heat of combustion is prevented from radiating heat to the outside through the combustion chamber housing 21. In addition, to prevent the phenomenon that the combustion chamber housing 21 is corroded due to the high temperature heat of combustion.

Such a dry combustion chamber cooling structure has a simple structure, but heat efficiency is lower than that of a wet (wet type) combustion chamber cooling structure, which will be described later, because the radiant heat of combustion cannot be used for heating water.

3 is a cross-sectional view illustrating a wet type cooling chamber cooling structure in which a heating water pipe is wound around an outer wall of a combustion chamber housing as another embodiment of a combustion chamber cooling structure of a conventional boiler.

The heating water pipe 35 through which the heating water flows is wound around the side surface of the combustion chamber 3 in contact with the outer circumference of the combustion chamber housing 21. In the process of dissipating high temperature heat generated inside the combustion chamber 30 to the outside of the combustion chamber 3, some heat is absorbed by the heating water circulating in the heating water pipe 35. Usually, the heating water pipe 35 is made of copper pipe and welded to the outside of the combustion chamber housing 21.

The wet (wet type) combustion chamber cooling structure is introduced into the heat exchanger (15) in the state in which the heating water circulating in the heating water pipe (35) absorbs heat and is preheated. There is an advantage to improve the thermal efficiency in 15).

However, the conventional wet combustion chamber cooling structure has better thermal efficiency than the dry one, but there is a possibility that condensed water may occur on the inner wall of the combustion chamber, and if the copper pipe material is used, the manufacturing cost may increase.

In order to solve this problem, when using a material (for example, stainless steel) resistant to condensate, it is difficult to manufacture. In addition, when copper pipe material is used, it is weak to condensate, so if the temperature difference is small to reduce the generation of condensate, there is a limit in improving thermal efficiency.

The present invention has been made to solve the above-mentioned problems, and its object is to provide a combustion chamber cooling structure of a boiler that is simple to manufacture and can improve thermal efficiency.

The present invention for achieving the above object, in the combustion chamber cooling structure of the boiler having a combustion chamber formed therein the combustion chamber is formed so that the heating water absorbs the heat radiated through the combustion chamber housing, the heat radiation through the combustion chamber housing Heat is characterized in that the transfer to the heating water through the heat transfer medium.

The combustion chamber housing is composed of a double wall of the inner structure and the outer structure, the heat transfer medium may be configured to be accommodated in the medium receiving space between the inner structure and the outer structure.

A cooling pipe through which the heating water flows is located in the medium containing space; The cooling pipe may be configured such that both ends thereof pass through a cover covering the opening of the outer wall to surround the outer circumference of the inner structure.

Both ends of the cooling pipe may be configured to be connected to the heating water pipe by the adapter on the outer surface of the cover.

The heat transfer medium is made of water supplied by opening the water supply valve; Opening and closing of the water supply valve is performed by a signal of a water level sensor for sensing the water level of the heat transfer medium; The heat transfer medium may be configured to overflow when it is above a certain level.

According to the present invention, since the welding process is omitted compared to the conventional wet combustion chamber structure, the production is simple. In addition, since the heat radiated through the combustion chamber is indirectly transferred to the heating water through the heat transfer medium, there is an advantage that the heat efficiency can be improved while suppressing the generation of condensed water as much as possible.

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

Figure 4 is a perspective view showing a combustion chamber cooling structure according to an embodiment of the present invention, Figure 5 is a side cross-sectional view of the combustion chamber cooling structure shown in Figure 4, Figure 6 is a perspective view showing the inner structure shown in Figure 4, Figure 7a, 6 is a cross-sectional view of AA and BB of the inner structure shown in Figure 6, Figure 8 is a perspective view showing the outer structure shown in Figure 4, Figure 9a, b is a cross-sectional view of the CC and DD of the outer structure shown in Figure 8, Figure 10 4 is a perspective view showing the lid shown in FIG. 4, FIG. 11 is a perspective view showing the cooling pipe shown in FIG. 5, and FIG. 12 is a partial cross-sectional view of a portion where the adapter shown in FIG. 5 is coupled.

Referring to FIG. 5, the combustion chamber cooling structure according to the present embodiment includes an inner structure 110 in which a combustion chamber 110a is formed, and a medium accommodation space 120b for accommodating a heat transfer medium between the inner structure 110 and the inner structure 110. The outer structure 120 is formed, the cover 130 covering one side opening 122 of the outer structure 120, the cooling pipe 140 is coupled to the cover 130 to the heating water pipe 200 and Adapter 150 to connect, the bottom plate 160 is formed to form the bottom of the combustion chamber (110a).

The heat transfer medium is to transfer heat radiated through the inner structure 110 to the heating water flowing in the cooling pipe 140. For example, the heat transfer medium may be direct water.

6 and 7, the inner structure 110 has a space for a combustion chamber 110a at a central portion thereof. A burner 12 is installed below the combustion chamber 110a. The inner structure 110 has a flange portion 111 protruding along the periphery of the upper end of the body 112 is formed. A groove 113 is formed along a circumference of the flange portion 111 so that an O-ring 191 is inserted therein. In addition, a groove 114 is formed along the periphery of the lower end of the body 112 so that the O-ring 195 is inserted into the groove 114.

8 and 9, the outer structure 120 has a space 120a in which the inner structure 110 is inserted. An opening 122 having a substantially rectangular shape is formed at one side of the body 121, and a groove 123 into which an O-ring 192 is inserted is formed around the opening 122. A flange portion 124 bent inwardly is formed at the lower end of the body 121 to form a medium accommodation space 120b between the inner structure 120.

Referring to FIG. 10, a cover 130 covering the opening 122 is provided. The cover 130 has a substantially rectangular plate shape to cover the opening 122. Two cover holes 130a and 130b are formed in the cover 130 to allow both ends 140a and 140b of the cooling pipe 140 to pass through at a diagonal position.

Referring to FIG. 11, the cooling pipe 140 has a shape wound around the body 112 of the inner structure 110 a plurality of times, and a heating water flows therein. The heating water therein is indirectly absorbed by the heat transfer medium heat dissipated through the body 112 of the inner structure 110 by heat exchange with the heat transfer medium stored in the medium receiving space (120b). Both ends 140a and 140b of the cooling pipe 140 serve as inlets and outlets of the heating water.

Referring to FIG. 12, the adapters 150 are connected to the end portions 140a and 140b of the cooling pipe 140 to be connected to the heating water pipe 200. The adapter 150 has a flange portion 150b formed at the end of the cylindrical body 150a. One end of the cooling pipe 140 and one end of the heating water pipe 200 are inserted into the body 150a. Grooves 150c and 150d are formed in the inner side of the body 150a and the bottom surface of the flange portion 150b, so that O-rings 193 and 194 for airtightness are inserted, respectively.

On the other hand, as shown in Figure 5, the outer structure 120 may be provided with a water level sensor 170 for detecting the water level of the heat transfer medium and a water supply valve 180 for supplying the direct water which is the heat transfer medium. The water level of the heat transfer medium is sensed inside the medium receiving space 120b, and when the water level is below a certain level, the water supply valve 180 is opened to supply water directly. In addition, the direct water is introduced through the direct inlet 126, and when the water level of the heat transfer medium is above a certain level to the overflow (overflow) through the outlet 127 formed on the upper side of the outer structure (120).

Meanwhile, the material of the inner structure 110 may be made of aluminum which does not generate corrosion even when condensate is generated. In this case, the material of the outer structure 120 may be made of aluminum, but it is preferable that the heat transfer medium is made of plastic because the heat of combustion does not directly transfer the burner 12.

The heat transfer process by the above structure will be described. When combustion occurs in the burner 12, the heat of combustion is radiated through the body 112 of the inner structure 110. The heat dissipated in this way is transferred to a heat transfer medium stored in the medium receiving space 120b, and the heat transferred to the heat transfer medium is transferred to the heating water flowing inside the cooling pipe 140. The preheated heating water flows into the heating water pipe 200 and is supplied to the heat exchanger side installed in the boiler.

In the present invention having such a configuration, the welding process is omitted in comparison with the conventional structure, so the production is simple. In addition, conventionally, there was a limit in improving thermal efficiency due to the generation of condensed water, but the present invention can indirectly transfer heat radiated through the combustion chamber to the heating water through the heat transfer medium, thereby improving thermal efficiency while suppressing generation of condensed water as much as possible.

In the above described the present invention based on the preferred embodiment, the present invention is not limited to the above embodiment, various modifications by those skilled in the art within the scope of the technical idea of the present invention This is possible.

1 is a configuration diagram showing a schematic configuration of a general heating / hot water combined gas boiler,

2 is a cross-sectional view showing a dry type combustion chamber cooling structure using a conventional heat insulator;

3 is a cross-sectional view showing a conventional wet type combustion chamber cooling structure;

4 is a perspective view showing a combustion chamber cooling structure according to an embodiment of the present invention;

5 is a side cross-sectional view of the combustion chamber cooling structure shown in FIG. 4;

6 is a perspective view showing the inner structure shown in FIG.

Figures 7a, b is a cross-sectional view A-A and B-B of the inner structure shown in FIG.

8 is a perspective view showing the outer structure shown in FIG.

Figures 9a, b is a cross-sectional view C-C and D-D of the outer structure shown in Figure 8,

10 is a perspective view showing the cover shown in FIG.

11 is a perspective view showing a cooling pipe shown in FIG.

12 is a partial cross-sectional view of the portion in which the adapter shown in FIG. 5 is coupled;

Explanation of symbols on the main parts of the drawings

110: inner structure 111: flange

112: body 113,114: groove

120: outer structure 121: body

122: opening 123: groove

124: flange portion 126: direct inlet

127: outlet 130: cover

140: cooling pipe 150: adapter

160: bottom plate 170: water level sensor

180: water supply valve 191,192,193,194,195: O-ring

Claims (5)

In the combustion chamber cooling structure of the boiler having a combustion chamber housing in which a combustion chamber is formed therein and allowing the heating water to absorb heat radiated through the combustion chamber housing, Heat radiated through the combustion chamber housing is the combustion chamber cooling structure of the boiler, characterized in that the transfer to the heating water through a heat transfer medium. The method of claim 1, The combustion chamber housing is composed of a double wall of the inner structure and the outer structure, the heat transfer medium is a combustion chamber cooling structure of the boiler, characterized in that accommodated in the medium receiving space between the inner structure and the outer structure. The method of claim 2, A cooling pipe through which the heating water flows is located in the medium containing space; The cooling pipe is installed so as to surround the outer periphery of the inner structure through both ends of the cover covering the opening of the outer structure; combustion chamber cooling structure of the boiler. The method of claim 3, Both ends of the cooling pipe is the combustion chamber cooling structure of the boiler, characterized in that connected to the heating water pipe by the adapter on the outer surface of the cover. The method according to any one of claims 2 to 4, The heat transfer medium is made of water supplied by opening the water supply valve; An opening and closing operation of the water supply valve is performed by a signal of a water level sensor for detecting the water level of the heat transfer medium; The heat transfer medium is overflowed when the predetermined water level or more; combustion chamber cooling structure of the boiler.

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