JPH10325603A - Hot water storage type hot water boiler - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the occurrence of a trouble and to make a boiler compact by a method wherein a smoke tube is erected at a distance from a combustion chamber provided at an upper end with a burner, a combustion gas passage is provided to communicate together the combustion chamber and the combustion gas inlet of a smoke tube. SOLUTION: A burner 2 is arranged at the upper end of a combustion chamber 1, and a plurality of smoke tubes 3 are erected at a given distance from the combustion chamber 1. The lower end of the smoke tube 3 forms a combustion gas inlet 31 and an upper end forms a combustion gas outlet 32, and a chimney stand 7 is arranged in a manner to cover the gas outlet 32. Combustion gas in the combustion chamber 1 is caused to flow in the smoke tube 3 from the lower end of the combustion chamber 1 through a combustion gas passage 4, and further flow out to an external part through the chimney stand 7. In this case, heat is transferred to water through the inner wall surface of each of the combustion chamber 1, a combustion gas passage 4, and the smoke tube 3. This constitution prevents the occurrence of a trouble to a burner due to water and dust, facilitates counting and demounting of a burner, and further saves a space and brings a boiler into a compact state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a canned structure of a hot water storage type boiler.

[0002]

2. Description of the Related Art Generally, the structure of a hot water storage type boiler is
A combustion chamber is provided inside the cylindrical hot water storage chamber, and a burner is provided above or below the combustion chamber. In a structure in which a burner is provided at the lower part of the combustion chamber, water and dust may fall from above, and the burner may be broken by the water and dust. Further, in the structure in which the burner is provided in the upper part of the combustion chamber, the exhaust portion protrudes beside the boiler, which is not sufficient in terms of space saving.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a hot-water storage type boiler which has a small number of failures, is easy to handle, and is compact and saves space.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has a burner provided at an upper end of a combustion chamber, and a smoke pipe is erected at a predetermined interval from the combustion chamber. A combustion gas passage communicating the combustion chamber with a combustion gas inlet of the smoke tube is provided, and a hot water storage room surrounding at least a side wall of the combustion chamber and a side wall of the smoke tube is provided. Further, the combustion gas passage is surrounded by the hot water storage chamber, and a water pipe is erected in the combustion gas passage, and an upper end and a lower end of the water pipe communicate with the hot water storage chamber.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION A combustion chamber and a smoke tube are erected at predetermined intervals. The combustion chamber is preferably formed in a cylindrical shape, and a burner is provided at an upper end thereof. The smoke tube is provided with one large diameter or a plurality of small diameter tubes, the lower end of which is a combustion gas inlet, and the upper end thereof is a combustion gas outlet. The lower end of the combustion chamber and the lower end of the smoke tube are connected by a combustion gas passage. A hot water storage room is provided surrounding at least the side wall of the combustion chamber and the side wall of the smoke tube. The hot water storage chamber may surround the combustion gas passage. The external shape of the hot water storage chamber is square (rectangular, square, etc.) or round (oval, perfect circle, etc.). It is also preferable that a water pipe is provided upright in the combustion gas passage, and an upper end and a lower end of the water pipe communicate with the hot water storage chamber according to the embodiment.

The combustion gas (including the flame) generated in the combustion chamber flows into the combustion gas passage from the lower end of the combustion chamber, flows into the smoke tube through the combustion gas passage, and flows out through the smoke tube. In this combustion gas flow, heat is generated by radiant and convective heat transfer to the inner wall surface in the combustion chamber, by convective heat transfer to the wall surface of the hot water storage chamber in the combustion gas passage, and by convective heat transfer to the inner wall surface in the smoke tube. Through the water, and the water is heated to a predetermined temperature.

According to the above configuration, since the burner is provided at the upper part of the can body, no water or dust is applied to the burner, and no failure of the burner due to the water or dust occurs. At the time of maintenance, the burner can be easily attached and detached. Further, since the exhaust portion is provided at the upper portion of the can body, no extra space is required on the side of the can body, and a space-saving and compact can body structure can be obtained. In addition, there is little danger of burns due to contact with the exhaust part, and the safety is high.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 2 show a first embodiment of the present invention. A cylindrical combustion chamber 1 is erected, and a burner 2 is provided at an upper end of the combustion chamber 1. At a predetermined interval from the combustion chamber 1, a plurality of smoke tubes 3 are erected. In the illustrated embodiment, nine smoke tubes 3 are erected. The lower end of each of these smoke tubes 3 is a combustion gas inlet 31, and the upper end is a combustion gas outlet 32. The chimney bed 7 is provided so as to cover the combustion gas outlet 32.

[0010] The lower end of the combustion chamber 1 and the lower end of the smoke tube 3 communicate with each other through a combustion gas passage 4. A hot water storage chamber 5 is provided so as to surround the side wall of the combustion chamber 1, the side wall of the smoke pipe 3, and the combustion gas passage 4. The external shape of the hot water storage room 5 is rectangular, and the outer peripheral portion is formed of a water-cooled wall to minimize the amount of heat loss.

In the above configuration, a water supply pipe (not shown)
The water that has flowed into the hot water storage chamber 5 receives heat from the combustion gas (including the flame), is heated to a predetermined temperature, and flows out of a hot water supply pipe (not shown). On the other hand, the flow of the combustion gas is as follows. The combustion gas (including the flame) generated in the combustion chamber 1 flows into the combustion gas passage 4 from the lower end of the combustion chamber 1, flows into the smoke pipe 3 through the combustion gas passage 4, and passes through the smoke pipe 3 and the chimney base 7. And spills outside. In the flow of the combustion gas, heat is transmitted to the water through the inner wall surface of the combustion chamber 1, the wall surface of the combustion gas passage 4, and the inner wall surface of the smoke tube 3.

In the second embodiment shown in FIG. 3, the combustion chamber 1 is formed in a tapered shape. By doing so, it is possible to provide a combustion chamber with a minimum space corresponding to the spread of the flame. In addition, an expansion section 11 for absorbing thermal expansion is formed at an intermediate position of a wall surface constituting the combustion chamber 1. The hot water storage chamber 5 is formed so as to surround the side wall of the combustion chamber 1 and the side wall of the smoke tube 3, and the refractory material 8 is provided at the lower part of the can body to form the combustion gas passage 4.

In the third embodiment shown in FIG. 4, a water pipe 6 is provided upright in the combustion gas passage 4, and the upper and lower ends of the water pipe 6 communicate with the hot water storage chamber 5. By doing so, the heat recovery amount in the combustion gas passage 4 can be increased. In addition, one large-diameter smoke tube 3 is provided, and a heat exchanger 9 is provided in the smoke tube 3. This heat exchanger 9 is connected to a circulation line 11 provided with a circulation pump 10,
The hot water in the upper part of the hot water storage room 5 is returned to the lower part of the hot water storage room 5 so as to suppress the temperature unevenness in the hot water storage room 5.

[0014]

As described above, according to the present invention, the following effects can be obtained because the burner and the exhaust portion are provided at the upper part of the can body. Since the burner is provided in the upper part of the can body, the burner is not exposed to water or dust, and the burner does not break down due to the water or dust. Further, the burner can be easily attached and detached, so that the assemblability at the time of manufacture and the maintainability at the time of maintenance and inspection are remarkably improved. Since the combustion gas outlet of the smoke tube as the exhaust portion is provided at the upper part of the can body, no extra space is required on the side of the can body, so that a space-saving and compact can body structure can be obtained. In addition, there is little danger of burns due to contact with the exhaust portion, and a highly safe can body structure can be obtained.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of FIG.

FIG. 3 is a longitudinal sectional view showing a second embodiment of the present invention.

FIG. 4 is a longitudinal sectional view showing a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Combustion chamber 2 Burner 3 Smoke tube 4 Combustion gas passage 5 Hot water storage room 6 Water pipe 7 Chimney stand 8 Refractory material 9 Heat exchanger 10 Circulation pump 11 Expansion unit 12 Circulation line 31 Combustion gas inlet 32 Combustion gas outlet

Claims (2)

[Claims] 1. A burner 2 is provided at an upper end of a combustion chamber 1 and a smoke pipe 3 is erected at a predetermined interval from the combustion chamber 1 to communicate the combustion chamber 1 with a combustion gas inlet 31 of the smoke pipe 3. A hot-water storage type hot water boiler comprising: a hot-gas storage chamber 5 surrounding at least a side wall of the combustion chamber 1 and a side wall of the smoke pipe 3. 2. The hot water storage type hot water boiler according to claim 1, wherein the hot water storage chamber surrounds the combustion gas passage, and a water pipe is erected in the combustion gas passage. A hot water storage type hot water boiler, wherein a lower end communicates with the hot water storage chamber 5.