JPH0145540B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a hot water boiler that heats water to obtain hot water of around 80°C, and particularly relates to a hot water boiler that can significantly improve heat exchange efficiency.

[Prior art]

Conventionally, this type of hot water boiler has been designed to guide the high-temperature exhaust gas from the combustion chamber into a number of exhaust pipes, and to exchange heat between the high-temperature exhaust gas flowing inside the exhaust pipes and the water outside the exhaust pipes. generally known.

However, in this type of hot water boiler, the high-temperature exhaust gas is passed through the exhaust pipe only once for heat exchange, so the heat exchange efficiency is poor, and if combustion is incomplete, soot can build up in the narrow-diameter exhaust pipe. There are disadvantages in that the heat exchange efficiency is further deteriorated due to the adhesion of carbon dioxide, and maintenance is not easy.

[Purpose of the invention]

The present invention was made in view of the current situation, and an object of the present invention is to provide a hot water boiler that can improve heat exchange efficiency and downsize the device, and is extremely easy to maintain.

[Summary of the invention]

The present invention includes a combustion chamber that has a firing port at one end in the longitudinal direction and an exhaust port that opens at the other end in the longitudinal direction with a required rising dimension from the bottom surface; a hot water storage tank; a side hot water storage tank formed on both sides of the combustion chamber via the combustion chamber side plates and communicating with the bottom hot water tank; formed on the top of the combustion chamber via the combustion chamber top plate; an upper hot water storage tank communicating with the side hot water storage tank; an upper hot water tank lowering portion formed by bending the combustion chamber top plate downward at the end of the upper hot water storage tank on the exhaust port side; an upper hot water storage tank groove formed by bending the widthwise central portion of the top plate of the combustion chamber downward into a groove shape between the lowering portion of the upper hot water storage tank and the firing opening; a heat exchange chamber disposed through the exhaust port to guide the exhaust gas discharged from the exhaust port to one end in the longitudinal direction, and to turn the exhaust gas at least once in the longitudinal direction and guide it to the chimney;
A hot water tank disposed at the top of the heat exchange chamber via the heat exchange chamber top plate; extended in the longitudinal direction of the combustion chamber on the bottom surface of the combustion chamber, and communicated with the bottom hot water storage tank via a vertical pipe. bottom pipes; a large number of riser pipes arranged on both sides of the combustion chamber, the lower end of which communicates with the bottom pipe or the lower hot water storage tank, and the upper end of which communicates with the upper hot water storage tank groove; a large number of riser pipes arranged within the heat exchange chamber; A hot water boiler is constructed from a communication pipe that communicates the hot water tank and the upper hot water storage tank in the vertical direction, thereby making it possible to downsize the device and simplify maintenance by improving heat exchange efficiency. It is characterized by

[Embodiments of the invention]

The present invention will be explained below based on an embodiment shown in FIGS. 1 to 8.

The hot water boiler according to this embodiment has a combustion chamber 1 arranged at the lower end of the device as shown in FIGS. 1 to 5.
A lower hot water storage tank 2, a side hot water storage tank 3, and an upper hot water storage tank 4 are arranged to surround the upper and lower surfaces and both sides of the combustion chamber 1, and a heat exchange chamber is arranged above the upper hot water storage tank 4. 5, and a hot water supply tank 6 disposed above the heat exchange chamber 5, and a water supply tank 7 is formed in isolation at an upper corner of one longitudinal end of the hot water supply tank 6.

As shown in FIGS. 1 to 4, the combustion chamber 1 is formed into a rectangular tube shape, which is placed horizontally, and includes a bottom plate 1a with refractory bricks B _F arranged on the upper surface, side plates 1b on both sides, and a top plate 1c. , at one longitudinal end thereof, a first
As shown in FIGS. 1, 2, and 8, a rectangular cap-shaped combustion opening 8 having a burner mounting portion 8a is installed, and at the other end in the longitudinal direction, as shown in FIGS. 1, 2, and 5. The bottom plate 1 is attached to both ends in the width direction.
A rectangular exhaust port 9 rising from a with a required rising dimension is provided respectively. As shown in FIGS. 3 and 4, each of the hot water storage tanks 2, 3, and 4 is formed in an annular shape as a whole on the outside of the bottom plate 1a, side plate 1b, and top plate 1c.

Further, as shown in FIGS. 2 and 8, the fire opening 8 is connected to the combustion chamber 1 through a hinge 8b at one end in the width direction.
The opening end of the combustion chamber 1 can be opened and closed, which is convenient for cleaning the inside of the combustion chamber 1. In addition, at the opening end of the combustion chamber 1 which is opened and closed by the combustion chamber 1, a square ring-shaped protrusion 1d, which is slightly smaller than the combustion chamber 8, is fixed as shown in FIGS. The guide is designed to seal when the fire port 8 is closed.

As shown in FIGS. 1 and 6, the lower hot water storage tank 2 has two holes that have a large number of small holes on the circumferential surface, extend in the longitudinal direction, and protrude from the end on the exhaust port 9 side. A water supply nozzle 10 is provided, and water from two water supply nozzles 11 provided in the water supply tank 7 is supplied to this water supply nozzle 10. Further, at the end of the upper hot water storage tank 4 on the exhaust port 9 side, a plate 1c of the combustion chamber 1 is provided as shown in FIGS. 1 and 4.
The lower part 4 of the upper hot water storage tank is bent downward in a step-like manner.
A is formed between the lower part 4a of the upper hot water tank 4 and the firing opening 8, as shown in FIGS.
The upper hot water storage tank groove portion 4b is formed by bending the center portion in the width direction of c downward into an inverted trapezoidal groove shape. The top surface of the upper hot water storage tank 4 is partitioned by the bottom plate 5a of the heat exchange chamber 5, as shown in FIGS. 1, 3, and 4, and the top plate 5b of the combustion chamber 5 is It also serves as the bottom plate of the hot water tank 6 located above it.

Inside the combustion chamber 1, as shown in FIGS. 1 to 4, a bottom pipe 12 is provided on the bottom plate 1a thereof and communicates with the bottom hot water storage tank 2 via a vertical pipe 13.
are arranged in the longitudinal direction of the combustion chamber 1, and a large number of inner riser pipes 14 and outer riser pipes 15 are arranged alternately in the longitudinal direction of the combustion chamber 1 in two rows along the side plates 1b on both sides. A large number of vertical pipes 16 are arranged in five rows in total at the lower part 4a of the hot water storage tank. The rising pipes 14 and 15 vertically communicate the bottom pipe 12 or the lower hot water tank 2 with the upper hot water tank groove 4b, and the vertical pipe 16 connects each step of the lower part 4a of the upper hot water tank with the lower hot water storage. The tank 2 is connected vertically.

At the outer end on the exhaust port 9 side of the combustion chamber 1 configured in this way, there are two rectangular cylindrical pieces facing the exhaust port 9, as shown in FIGS. 1, 2, and 7. A bottom plate 5b of the heat exchange chamber in which a flue 18 with a cleaning manhole 17 is arranged and the top end of the flue 18 is closed.
As shown in FIGS. 1, 5, and 6, two exhaust gas introduction ports 19 are provided at both sides of the heat exchange chamber 5 in the width direction. and exhaust port 9
The exhaust gas that has been led to the flue 18 is led to both sides of the heat exchange chamber 5 in the width direction through the exhaust gas introduction ports 19 .

Inside this heat exchange chamber 5, there are
As shown in FIG. 6 and FIG. 6, a large number of communicating pipes 20 are arranged in, for example, five rows in the width direction, and these communicating pipes 20 allow the upper hot water storage tank 4 and the hot water tank 6 to pass through the heat exchange chamber 5 up and down. is communicated with. In addition, a rectangular cylindrical flue 21 is connected to the end of the heat exchange chamber 5 on the exhaust inlet 19 side at the center in the width direction, as shown in FIGS. 1, 6, and 7. . As shown in FIG. 6, the inside of this heat exchange chamber 5 is divided into three rooms in the width direction by partition plates 22 arranged between the communication pipes 20 in the second row in the width direction and between the communication pipes 20 in the fourth row. The chambers communicate with each other at the longitudinal ends opposite to the exhaust gas inlet 19 and the flue 21. The exhaust gas led into the heat exchange chamber 5 from the exhaust inlet 19 is turned back once in the longitudinal direction of the heat exchange chamber 5, and then is led from the flue 21 to a chimney (not shown) through between the partition plates 22 on both sides. I'm starting to get scared.

Partition plate 22 in each row of communication pipe 20
As shown in FIG. 6, it is disposed between the outside of the communication pipe 20 on the side of the exhaust inlet 19 and the inside of the communication pipe 20 on the side away from the exhaust inlet 19, and has a saw blade shape as a whole. As a result, the 6th
It is considered that heat exchange is further promoted by the exhaust gas flowing as shown by arrow a in the figure.

Further, on both sides of the heat exchange chamber 5 in the width direction, third
As shown in FIG. 6, the heat exchange chamber side hot water storage tank 23, whose upper end communicates with the hot water tank 6 and whose lower end communicates with the side hot water storage tank 3 and the upper hot water storage tank 4, connects the side plate 5c of the heat exchange chamber 5. They are provided through each. In addition, at the longitudinal end of the heat exchange chamber 5 on the flue 21 side and the corresponding end surface of the flue 18,
As shown in FIGS. 1, 2, and 6, longitudinal end hot water storage whose periphery communicates with the lower hot water storage tank 2, side hot water storage tank 3, hot water tank 6, and heat exchange chamber side hot water storage tank 23, respectively. A tank 24 is provided over the entire surface except for the cleaning manhole 17 and the flue 21. That is, the cleaning manhole 17 and the flue 21 pass through the longitudinal end hot water storage tank 24 in the lateral direction.

Further, at the longitudinal end opening on the side of the fire opening 8 of the heat exchange chamber 5, a cleaning lid 25 in the shape of a rectangular cap having a handle 25a is provided as shown in FIGS. 1, 6, and 8. The cleaning lid 25 can be opened and closed via a hinge 25b at one end in the width direction. Further, at the open end of the heat exchange chamber 5 in which the lid body 25 is provided, a square ring-shaped protrusion 5 having the same function as the protrusion 1d of the combustion chamber 1 is provided.
d is fixedly installed.

In FIG. 1, 26 is a hot water nozzle for supplying hot water in the hot water tank 6 to the point where it is used, and 27 and 28 are for preventing an abnormal pressure rise in the hot water tank 6 and the water tank 7, and A manhole provided for inspection, cleaning, etc., 29 a water supply pipe with a T-shaped tip for supplying water from a water source (not shown) to the water tank 7, 30 and 31 provided in the hot water tank 6 and the water tank 7, respectively. The water level gauge 31 in the water supply tank 7 is located lower. Therefore, the water levels in both tanks 6 and 7 are normally regulated by the position of the water level gauge 31, and the water level gauge 30 is provided for safety.

Further, in FIGS. 2, 3, 5 to 8, reference numeral 32 denotes a water drain nozzle for draining water during cleaning inside the boiler, and is normally closed.

Next, the effect will be explained.

In use, water is first supplied from the water supply pipe 29 to the water supply tank 7. Then, this water is transferred to water tank 7.
and the water supply nozzle 10 of the lower hot water storage tank 2 to the lower hot water storage tank 2. And finally, each hot water tank 2, 3, 4, 23, 2
4, hot water tank 6, water tank 7, and each pipe 12,
13, 14, 15, 16, and 20 are filled with water.

After filling with water in this manner, a burner is installed at the fire port 8 and combustion is caused within the combustion chamber 1. Then,
The peripheral walls 1a, 1b, 1c of the combustion chamber 1 and the pipes 12, 13, 14, 15, 16 are heated directly by the flame of the burner or indirectly by the high-temperature exhaust gas, and heat is generated between them and the water in contact with them. The exchange takes place and the water heats up rapidly.

At this time, the exhaust port 9 of the combustion chamber 1 is not provided at the center in the width direction, but is provided at both sides, and the lower part 4a of the upper hot water storage tank functions as a so-called spark, so that high-temperature exhaust is not provided. Once trapped in the combustion chamber 1, it is discharged from the exhaust port 9. Therefore, sufficient heat exchange is performed, and it becomes possible to significantly improve heat exchange efficiency.

The high-temperature exhaust gas discharged from the exhaust port 9 flows into the flue 18
The exhaust gas is guided to both sides of one longitudinal end of the heat exchange chamber 5 through the exhaust inlet 19, and then turned back once in the longitudinal direction within the heat exchange chamber 5, and then guided from the flue 21 to a chimney (not shown). During this time, the bottom plate 5a, top plate 5b, and side plate 5c of the heat exchange chamber 5 are
Heat exchange is performed between the water and the water via the communication pipe 20 and the like.

Therefore, the water in each of the hot water storage tanks 2, 3, 4, 23, 24 and the hot water tank 6 convects between the hot water tanks due to temperature differences caused by heat exchange, and is heated almost uniformly in each location. become.

FIG. 9 shows another embodiment of the present invention, in which a large number of fins 33 are provided on the outer surfaces of the inner riser pipe 14, outer riser pipe 15, and communication pipe 20 in the previous embodiment.

By providing the fins 33 in this manner, the heat exchange area increases accordingly, and heat exchange efficiency can be improved. This fin 33 is connected to the pipe 1
If the pipes 12, 13, and 16 other than 4, 15, and 20 are also provided, further improvement in heat exchange efficiency can be expected. However, when installing the fins 33, sufficient consideration must be given so as not to obstruct the flow of high-temperature exhaust gas.

FIG. 10 shows still another embodiment of the present invention, in which, unlike the case shown in FIG. 1, the top plate 1c of the combustion chamber 1 is bent linearly downward to form an upper hot water storage tank descending portion 4a. This is how it was done.

Even with this configuration, the lower surface of the lower part 4a of the upper hot water storage tank, which forms a flat downward slope, functions as a fire break, so the same effect as in the case shown in FIG. However, it is easy to process and clean the inside of the combustion chamber 1.

In each of the above embodiments, a case has been described in which the inside of the heat exchange chamber 5 is divided into three rooms in the width direction by the partition plate 22, but it is also possible to divide the inside of the heat exchange chamber 5 into two rooms vertically and turn back the exhaust gas once in the longitudinal direction. Alternatively, the exhaust gas may be turned back twice or more in the longitudinal direction.

Further, necessary parts such as the outer peripheral surface of the boiler may be covered with a heat insulating material.

〔Effect of the invention〕

As explained above, the present invention heats water by forming a hot water tank around the combustion chamber.
Moreover, since a large number of pipes are disposed within the combustion chamber and heat exchange is performed in these portions as well, the heat exchange area is dramatically increased and heat exchange efficiency can be greatly improved.

In addition, hot air is trapped in the combustion chamber by the lower part of the upper hot water storage tank, thereby further improving heat exchange efficiency.

In addition, the exhaust gas discharged from the exhaust port is guided into the heat exchange chamber without being released into the atmosphere, and is turned around at least once in the longitudinal direction before being released into the atmosphere. Moreover, there are many communicating pipes in the heat exchange chamber. is arranged, heat is absorbed in this part as well, and the boiler efficiency is improved, making it possible to downsize the device and save energy.

In addition, the exhaust gas does not flow inside the pipes, but instead flows through the space between the pipes, so even if soot is generated due to incomplete combustion, the exhaust passage will not be immediately closed, and combustion will continue. Its self-cleaning action removes soot, making maintenance extremely easy.

Further, since a sufficient gap is formed between the peripheral wall of the combustion chamber and the pipe within the combustion chamber, the interior of the combustion chamber can be completely and extremely easily cleaned using a wire brush or the like.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view showing an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along the - line in FIG. 1, FIG. 3 is a cross-sectional view taken along the - line in FIG. 5 is a sectional view taken along the - line in FIG. 1, FIG. 6 is a sectional view taken along the - line in FIG. 1, FIG. 7 is a right side view of FIG. The left side view, FIGS. 9 and 10 are explanatory diagrams showing other embodiments of the present invention, respectively. 1... Combustion chamber, 1a, 5a... Bottom plate, 1b, 5
c... Side plate, 1c, 5b... Top plate, 2... Lower hot water tank, 3... Side hot water tank, 4... Upper hot water tank, 4
a...Upper hot water tank lowering part, 4b...Upper hot water tank groove, 5...Heat exchange chamber, 6...Hot water tank, 7...Water tank, 8...Fire outlet, 12...Bottom pipe, 13...
... Vertical pipe, 14 ... Inner rising pipe, 15
...Outside rising pipe, 16...Vertical pipe, 19...Exhaust inlet, 20...Communication pipe,
21... Flue, 22... Partition plate, 23... Heat exchange room side hot water storage tank, 24... Longitudinal end hot water storage tank, 2
5...Cleaning lid body, 33...Fin.

Claims (1)

[Scope of Claims] 1. A combustion chamber having a firing port at one end in the longitudinal direction and an exhaust port opening at the other end in the longitudinal direction with a required rising dimension from the bottom surface; formed at the bottom of the combustion chamber through a bottom plate of the combustion chamber. a bottom hot water storage tank formed on both sides of the combustion chamber via the combustion chamber side plates and communicating with the bottom hot water storage tank; a side hot water storage tank formed on the top of the combustion chamber via the combustion chamber top plate; , and an upper hot water storage tank communicating with the side hot water storage tank; an upper hot water storage tank lowering portion formed by bending the combustion chamber top plate downward at the end of the upper hot water storage tank on the exhaust port side; and the upper hot water storage tank; an upper hot water storage tank groove formed by bending the widthwise central part of the combustion chamber top plate downward into a groove shape between the upper hot water storage tank lowering part of the hot water storage tank and the firing opening; a heat exchange chamber disposed through a hot water storage tank, which guides the exhaust gas discharged from the exhaust port to one end in the longitudinal direction, and turns the exhaust gas at least once in the longitudinal direction to guide it to the chimney; A hot water tank placed above through a heat exchange chamber top plate;
A bottom pipe extends in the longitudinal direction of the combustion chamber on the bottom surface of the combustion chamber and communicates with the bottom hot water storage tank via a vertical pipe; A large number of bottom pipes are arranged on both sides of the combustion chamber, and the lower end thereof is a bottom pipe or a bottom hot water storage tank. A riser pipe that communicates with the tank and whose upper end communicates with the upper hot water storage tank groove; and a plurality of communication pipes that are arranged in the heat exchange chamber and communicate the hot water tank and the upper hot water storage tank in the vertical direction. A hot water boiler featuring 2. The hot water boiler according to claim 1, wherein exhaust ports are provided at both ends in the width direction of the combustion chamber. 3. Claims 1 or 2, characterized in that each stage of the lower part of the upper hot water storage tank and the lower hot water storage tank are vertically connected to each other by vertical pipes arranged on both sides of the combustion chamber. Hot water boiler as described. 4 At one longitudinal end of the heat exchange room, provide exhaust inlet ports on both sides to guide the exhaust air from the exhaust ports into the heat exchange room, and create a flue in the center to guide the exhaust air from the heat exchange room to the chimney. In addition, the communication pipes in the rows located between each exhaust inlet and the flue are successively connected with partition plates to divide the heat exchange chamber into three rooms in the width direction, and the pipes are connected from each exhaust inlet to the flue. Claims 1, 2, or 3, characterized in that the exhaust gas is sent through the chambers on both sides to the other end of the heat exchange chamber, turned back, and guided to the flue through the central chamber. Hot water boiler as described. 5. A patent claim characterized in that each partition plate sequentially connects the outside of the communicating pipe on the side closer to the exhaust inlet and the inner side of the communicating pipe on the side away from the exhaust inlet to form a saw blade shape as a whole. A hot water boiler according to scope 4. 6. Claim 1, characterized in that fins are provided on the outer surface of at least one of the rising pipe and the communicating pipe;
The hot water boiler according to item 2, 3, 4, or 5. 7 Claims 1 and 2 characterized in that the end of the combustion chamber on the side of the combustion chamber can be completely opened.
The hot water boiler according to item 1, 3, 4, 5 or 6.