JP2002168415A - Combustion equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide combustion equipment which can secure stable combustion by preventing the re-liquefication of flue gases and, at the same time, uses a small number of parts and, accordingly, can be manufactured easily. SOLUTION: This combustion equipment is manufactured by successively accumulating a blower, driving machine section, air quantity adjusting section, mixing section, and burning section. The mixing section, burning section, and a vaporizing section 8 are formed in a burner port plate 36 and a primary air supply pipe 88 is integrally formed with the plate 36. The end section of a vaporizing chamber 60 is brought into contact with the plate 36. In addition, internal walls 43 and 59 are provided on the burner port plate 36 near the vaporizing chamber 60. At the time of performing combustion, the walls 43 and 59 receive heat and the heat of the burner port plate 36 is transferred to the vaporizing chamber 60 and promotes vaporization.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion apparatus using a fuel other than a gas such as a liquid. The combustion device of the present invention is particularly suitable as a combustion device used for a heating device or a water heater.

[0002]

2. Description of the Related Art A water heater or a heater used in an area where city gas is not widely used often employs a combustion device using a liquid fuel such as kerosene. Also in this,
When used for applications having a relatively small calorific value, a type in which liquid fuel is vaporized by a vaporizing section and this vaporized gas is sent to a combustion section and burned is often used (Japanese Patent Application Publication No.
No.-21332).

FIG. 33 is a sectional view showing an example of a vaporizing section employed in a conventional combustion device. In this type of combustion device, the vaporization section 200 is provided below the combustion section 201.
Further, in the conventional combustion apparatus 200, the vaporizing section 20
0 is independent of the combustion unit 201. That is, the vaporization unit 2
The components constituting 00 are all different from the components constituting the combustion unit 201, and there is no component shared by both. The vaporizing section 200 includes a concave-shaped vaporizing chamber 202. An electric heater 2 is provided at a position above the vaporizing chamber 202.
03 is built in, and the inner wall of the vaporization chamber 202 can be heated. A rotary cup 205 is built in the vaporization chamber 202. Rotary cup 205
Is rotated at a high speed by a motor (not shown). The rotary cup 205 has an opening 209 in the center of the bottom, and a primary air supply tube 208 is provided near the opening 209. Further, a shake-off plate 206 is provided above the cup 205.

Then, the rotary cup 205 is rotated by a motor (not shown), and the primary air supply cylinder 20 is further rotated.
From 8, air is blown into the rotary cup 205 of the vaporizing section 200. Then, kerosene is dropped from the fuel pipe 207 into the rotary cup 205, and the kerosene is scattered toward the inner wall of the vaporization chamber 202 by centrifugal force. as a result,
Kerosene is vaporized by receiving heat from the inner wall of the vaporization chamber 202, and the vaporized fuel is mixed with air blown into the vaporization chamber 202 from the primary air supply tube 208. This mixed gas is discharged from the lower opening 210 and
It is sent to 1 for combustion.

[0005]

As described above, in this type of water heater, the liquid fuel is vaporized by applying thermal energy to the liquid fuel. However, in the conventional combustion apparatus, it is difficult to give sufficient heat energy to the fuel in the vaporization section,
The temperature of the fuel gas discharged from the vaporizing section is often low. As a result, during the period from the vaporization section to the combustion section, the fuel that has been vaporized may return to the original liquid. Therefore, this type of water heater or the like sometimes causes poor combustion. In particular, when the combustion device is operated under a high load, there is a case where vaporization becomes insufficient due to a large amount of supplied fuel. In addition, even if vaporization was possible during operation, fuel that could not be vaporized immediately after the fire was extinguished was sometimes emitted as white smoke. As a countermeasure, it is conceivable to increase the capacity of the electric heater 203 provided in the vaporization chamber 202. However, if the capacity of the electric heater 203 is increased, the advantage of this type of combustion apparatus is that the power consumption increases and the operating cost is low. Will be offset.

In the prior art combustion apparatus, the components constituting the vaporizing section are completely separate from the components constituting the combustion section.
I was dissatisfied with the large number of parts. Therefore, there is a problem that it takes time to manufacture, store and assemble each part.

Accordingly, the present invention focuses on the above-mentioned problems of the prior art, and develops a combustion apparatus which can prevent re-liquefaction of combustion gas and secure stable combustion, has a small number of parts, and is easy to manufacture. Is the subject.

[0008]

According to a first aspect of the present invention, there is provided a combustion apparatus for vaporizing and burning a liquid fuel, wherein a flame hole plate for distributing the flame holes in a plane is provided. The flame hole plate is provided with a protruding member that protrudes from the opening surface of the flame hole to the flame generating portion side in the flame hole distribution region.

The combustion apparatus according to the present invention has a flame hole plate for distributing the flame holes in a plane. In the combustion device of the present invention, the flame hole plate is provided with a protruding member that protrudes from the opening surface of the flame hole to the flame generating portion side in the flame hole distribution region. Therefore, the projecting member of the flame hole plate is exposed to the flame, and the temperature of the flame hole plate increases. Here, since the flame hole plate distributes the flame holes in a plane as described above, a part thereof often forms a fuel gas flow path. Also, at least the flame plate is adjacent or adjacent to the fuel flow path. Therefore, according to the combustion device of the present invention, the fuel gas is heated by increasing the temperature of the flame plate,
Reliquefaction is prevented.

According to a second aspect of the present invention, there is provided a combustion apparatus having a vaporizing section for vaporizing a liquid fuel, wherein the vaporizing section vaporizes the liquid fuel, discharges the fuel from the flame hole, and burns the fuel hole. The flame hole plate is provided with a protruding member that protrudes from the opening surface of the flame hole to the flame generating portion side in the flame hole distribution region, and further includes at least a part of the vaporizing portion. Is a combustion device which is in contact with the flame hole plate.

The combustion apparatus of the present invention also has a flame hole plate for distributing the flame holes in a plane, and the flame hole plate protrudes into the flame hole distribution region from the opening surface of the flame hole toward the flame generating portion. Since the protruding member is provided, the temperature of the flame hole plate rises, and the fuel gas flow path is kept warm. In addition, in the combustion device of the present invention, a part or the whole of the vaporizing part is in contact with the flame hole plate. Therefore, the temperature of the vaporizing section increases, and vaporization of the liquid fuel is promoted.

According to a third aspect of the present invention, there is provided the combustion apparatus according to the first or second aspect, wherein the projecting member is provided near the vaporizing portion.

In the combustion device according to the present invention, the projecting member is provided near the vaporizing section. Therefore, a large proportion of the heat absorbed by the projecting member is conducted to the vaporizing section, and the temperature of the vaporizing section increases. Therefore, the liquid fuel is more efficiently vaporized.

According to a fourth aspect of the present invention, there is provided the combustion apparatus according to any one of the first to third aspects, wherein the projecting member is arranged in a wall shape. Here, the wall shape refers to a state where it is arranged with a certain area spread, not only when it is continuous, but also when rods and blocks are arranged with a gap Including cases.

[0015] In the combustion device of the present invention, the protruding member is arranged in a wall shape. Therefore, the protruding member receives heat in a large area, and can transmit a large amount of heat to the fuel gas flow path and the vaporizing portion.

The invention according to claim 5 is the combustion apparatus according to any one of claims 1 to 4, wherein the projecting member has irregularities.

[0017] Also in the combustion device of the present invention, the protruding member can receive heat in a wide area, and a large amount of heat can be transmitted to the fuel gas flow path and the vaporizing section.

The invention according to claim 6 is characterized in that the flame hole plate has an outer wall portion surrounding the flame hole distribution region, and the projecting member is provided at a portion surrounded by the outer wall portion. A combustion device according to any one of claims 1 to 5.

In the combustion apparatus according to the present invention, the flame plate has an outer wall surrounding the flame distribution area. Therefore, in the combustion device of the present invention, not only does heat not escape to the outside, but also the flame hole plate is kept warm by the outer wall. Further, in the present invention, since the projecting member is provided at a portion surrounded by the outer wall portion, the projecting member is exposed to a higher temperature, and the effect of increasing the temperature of the fuel gas flow path and the vaporizing section is high.

The invention according to claim 7 further comprises a vaporizing section for vaporizing the liquid fuel, the vaporizing section includes a vaporizing chamber and an air supply cylinder, and the air supply cylinder is inserted into the vaporization chamber, and the air supply cylinder In a combustion device that introduces air into the vaporization chamber through the, vaporizes the fuel in the vaporization chamber and mixes with the air, and supplies and burns a mixed gas of the fuel and the air to the combustion unit, the flame hole is planar. A part of the vaporization chamber is in the flame hole distribution region of the flame hole plate, and the opening end of the air supply cylinder is in the vaporization chamber, and the flame generating portion is larger than the opening surface of the flame hole. A combustion device protruding to the side.

The combustion apparatus of the present invention also has a flame hole plate for distributing flame holes in a plane. And a part of the vaporization chamber is in the flame hole distribution area of the flame hole plate. Therefore, the vaporization chamber is directly heated by the flame generated from the flame hole plate, the temperature of the vaporization section rises, and the vaporization of the liquid fuel is promoted. In addition, in the combustion device of the present invention, the open end of the air supply cylinder is located in the vaporization chamber and protrudes from the opening surface of the flame hole toward the flame generating portion. Here, the portion of the vaporization chamber that protrudes toward the flame generating portion from the opening of the flame hole is a portion that is directly heated by the flame, and thus has a high temperature. Therefore, in the present invention, the air supplied to the vaporization chamber is supplied to a portion where the temperature becomes higher even in the vaporization chamber, and the fuel is vaporized efficiently. Further, according to the configuration of the present invention, the length of the air supply cylinder is relatively long, and the air supplied to the vaporization chamber is preheated.

The invention according to claim 8 has a vaporizing section for vaporizing the liquid fuel, the vaporizing section includes a vaporizing chamber having an opening and an air supply cylinder, and the air supply cylinder vaporizes from the opening. Air is introduced into the vaporization chamber through the air supply cylinder, the fuel is vaporized in the vaporization chamber and mixed with the air, and the mixed gas of the fuel and the air is mixed with the inner wall of the opening and the air supply cylinder. In a combustion device that discharges from the mixed gas discharge gap formed between and supplies the gas to the combustion section and burns, the average cross-sectional area of the air supply cylinder is larger than the cross-sectional area of the mixed gas discharge gap. Combustion device.

In the combustion apparatus according to the present invention, the vaporizing section has a vaporizing chamber provided with an opening, air is introduced into the vaporizing chamber by the air supply tube from the opening, and further, the fuel and the air flow through the opening. The mixed gas is discharged. In the vaporizing section employed in the present invention, the average sectional area of the air supply cylinder is larger than the sectional area of the mixed gas discharge gap. That is, in the present invention, the outlet side of the vaporization chamber is narrow, and the mixed gas is agitated with each other when discharged from the vaporization chamber to promote mixing and homogenization.

According to a ninth aspect of the present invention, there is provided a flame hole plate for distributing the flame holes in a plane, and a part of the vaporizing chamber is located in a flame hole distribution region of the flame hole plate. A combustion device according to claim 8.

The combustion apparatus of the present invention has a flame hole plate for distributing the flame holes in a plane, and a part of the vaporization chamber is in the flame hole distribution region of the flame hole plate. Therefore, the vaporization chamber is directly heated by the flame generated from the flame hole plate, the temperature of the vaporization section rises, and the vaporization of the liquid fuel is promoted.

According to a tenth aspect of the present invention, there is provided a vaporizing section for vaporizing liquid fuel, the vaporizing section includes a vaporizing chamber having an opening and an air supply cylinder, and the air supply cylinder vaporizes from the opening. Air is introduced into the vaporization chamber through the air supply cylinder, the fuel is vaporized in the vaporization chamber and mixed with the air, and the mixed gas of the fuel and the air is mixed with the inner wall of the opening and the air supply cylinder. In a combustion device that discharges from a mixed gas discharge gap formed between them and supplies and burns to a combustion unit, the combustion device has a flame hole plate that distributes flame holes in a plane, and a part of the vaporization chamber is a flame hole plate. The opening end of the air supply cylinder is located in the vaporization chamber and projects to the flame generating portion side from the opening surface of the flame hole, and the average cross-sectional area of the air supply cylinder is equal to the mixed gas discharge gap. A combustion device characterized by being larger than a cross-sectional area.

The combustion device of the present invention also has a flame hole plate for distributing the flame holes in a plane. And a part of the vaporization chamber is in the flame hole distribution area of the flame hole plate. Therefore, the vaporization chamber is directly heated by the flame generated from the flame hole plate, the temperature of the vaporization section rises, and the vaporization of the liquid fuel is promoted. In addition, in the combustion device of the present invention, the opening end of the air supply cylinder is located in the vaporization chamber and protrudes from the opening surface of the flame hole toward the flame generating portion, so that the air supplied to the vaporization chamber is even more in the vaporization chamber. The fuel is supplied to the portion where the temperature becomes high, and the fuel is efficiently vaporized. Further, in the combustion device of the present invention, the average cross-sectional area of the air supply cylinder of the vaporizing section is larger than the cross-sectional area of the mixed gas discharge gap, and thus the mixed gases are agitated with each other when discharged from the vaporizing chamber, and mixing is promoted. , Homogenize.

The invention according to claim 11 is characterized in that the opening end of the vaporizing chamber of the air supply cylinder is inclined from the inside toward the outside toward the opening of the vaporizing chamber. A combustion device according to any one of the above.

In the combustion device of the present invention, the opening end of the air supply cylinder in the vaporization chamber is inclined from the inside to the outside toward the opening of the vaporization chamber. Therefore, the air that has flowed out from the opening end of the air supply tube smoothly flows to the opening side of the vaporization chamber. That is, in the combustion device of the present invention, the open end of the air supply cylinder in the vaporization chamber is inclined from the inside toward the outside toward the opening of the vaporization chamber, so that the flow path resistance is small. That is, in this type of combustion device, it is necessary to introduce a large amount of air into a narrow vaporization chamber to mix the fuel and air, and since the internal flow path of the vaporization chamber has many direction change parts, the flow resistance in the vaporization chamber is low. Is big. On the other hand, a blower having a high static pressure is difficult to adopt because of cost considerations. Therefore, in this type of combustion device, there is a demand to lower the flow path resistance of the vaporization chamber as much as possible. The present invention has succeeded in reducing the flow path resistance by providing a slope at the opening end of the vaporization chamber of the air supply cylinder.

According to a twelfth aspect of the present invention, there is provided the combustion apparatus according to any one of the seventh to eleventh aspects, wherein the air supply cylinder is formed integrally with the flame hole plate.

In the combustion apparatus of the present invention, since the air supply cylinder is formed integrally with the flame hole plate, the heat of the flame hole plate is transferred to the air supply cylinder during combustion. Therefore, the temperature of the air supplied to the vaporization chamber increases, and the vaporization of the liquid fuel is promoted. Further, in the combustion device of the present invention, since the air supply cylinder is integrated with the flame hole plate, the number of parts is small and the assembly is easy.

According to a thirteenth aspect of the present invention, the vaporization chamber is partially or entirely in contact with the flame hole plate, or the vaporization chamber is integrally formed with the flame hole plate. Item 13. The combustion device according to any one of Items 7 to 12.

In the combustion apparatus of the present invention, a part or the whole of the vaporizing chamber is in contact with the flame hole plate, or the vaporizing chamber is formed integrally with the flame hole plate. The flame hole plate is a member for distributing the flame holes, and is located at a position closest to the flame, so that it becomes considerably hot during combustion. In the combustion device of the present invention, since a part or all of the vaporization chamber is in contact with the flame hole plate or is integrally formed,
During combustion, the heat of the flame plate is transferred to the vaporization chamber.
Therefore, the temperature of the vaporization chamber rises, and the vaporization of the liquid fuel is promoted.

According to a fourteenth aspect of the present invention, there is provided a vaporizing section for vaporizing a liquid fuel, the vaporizing section having a vaporizing chamber, vaporizing the fuel in the vaporizing chamber, mixing with the air, and mixing the fuel with the air. A combustion device for supplying a mixed gas with a combustion gas to a combustion unit and burning the gas, wherein a flame hole plate for distributing flame holes in a plane is provided, and a part or all of the vaporization chamber is in contact with the flame hole plate. Combustion device.

The combustion apparatus according to the present invention has a flame hole plate for distributing the flame holes in a plane, and a part or all of the vaporizing chamber is in contact with the flame hole plate. As described above, the burner plate becomes considerably hot during combustion.However, the combustion apparatus of the present invention employs a burner which burns because part or all of the vaporization chamber is in contact with the burner plate. The heat of the plate is transferred to the vaporization chamber. Therefore, the temperature of the vaporization chamber rises, and the vaporization of the liquid fuel is promoted.

[0036]

Embodiments of the present invention will be described below. In the following description, the upper and lower relationship is
Based on the state where the combustion device is installed in a water heater or the like. FIG.
1 is a sectional view of a water heater incorporating a combustion device of the present invention. FIG. 2 is a front view of the combustion device according to the embodiment of the present invention and a perspective view of an opening portion of the box. FIG. 3 is a sectional view of the combustion apparatus according to the embodiment of the present invention. FIG. 4 is an exploded perspective view of the entire combustion device according to the embodiment of the present invention. FIG. 5 is an exploded perspective view around the flow path forming member of the combustion device of FIG.
FIG. 6 is a perspective view illustrating a configuration when the fuel supply pipe is attached to the flow path forming member. FIG. 7 is a perspective view of an air amount adjusting unit employed in the combustion device of FIG. FIG. 8 is a perspective view of the vicinity of the combustion portion of the combustion device of FIG. 2 as viewed from above. FIG.
FIG. 3 is a front view of a fixed-side plate-shaped member of an air amount adjusting unit employed in the combustion device of FIG. 2. FIG. 10 is a side view of the fixed side plate-shaped member of FIG. FIG. 11 is a front view of a moving-side plate-like member of an air amount adjusting unit employed in the combustion device of FIG. FIG.
FIG. 3 is a front view of an air amount adjusting unit employed in the combustion device of FIG. 2 and shows a state where an opening is opened. FIG. 13 is a front view of an air amount adjusting unit employed in the combustion device of FIG. 2, showing a state in which an opening is closed. FIG. 14 is a front view of a flow dividing member employed in the combustion device of FIG. FIG. 15 is a drawing of the upper surface side (gas flow path side) of the flame hole plate employed in the combustion apparatus of FIG. FIG. 16 is a drawing of the lower surface side (flame hole side) of the flame hole plate of FIG. FIG. 17 is a front view of a state in which a flame hole plate, a flame hole member, a mesh member, and an auxiliary flame member used in the combustion device of FIG. 2 are combined. FIG. 18 is a front view of the flame hole member. FIG. 19 is a front view of the mesh member.
FIG. 20 is a front view of the flame stabilizer. FIG. 21 corresponds to FIG.
It is AA sectional drawing of. FIG. 22 is a front view and a plan view of a rotary cup employed in the combustion device of FIG. FIG. 23 is a sectional view taken along line AA of FIG. FIG. 24 shows FIG.
FIG. 6 is a sectional view taken along line BB of FIG. FIG. 25 is an enlarged sectional view taken along the line CC of FIG. FIG. 26 is an explanatory view illustrating the configuration of the gas passage side of the flame hole plate employed in the combustion device of FIG. 2. FIG. 27 is a perspective view of the vicinity of the flame hole of the combustion device of FIG. 2 as viewed from below. FIG. 28 is an explanatory diagram illustrating the flow of the fuel gas. FIG. 29 is an explanatory diagram illustrating the flow of the secondary air. FIG. 30 is a perspective view showing a superimposed structure of the flame hole member, the mesh member, and the auxiliary flame member. FIG. 31 is a schematic perspective view of the combustion device of FIG. 2 as viewed from below. FIG.
FIG. 5 is a perspective view of the vicinity of a flame hole of a combustion device according to another embodiment of the present invention, as viewed from below.

1 to 4, reference numeral 1 denotes a combustion apparatus according to an embodiment of the present invention. The combustion device 1 of the present embodiment is built in the water heater 21 with the flame hole facing downward as shown in the figure, and the blower 2, the driving mechanical unit 3, the air amount adjusting unit 5,
The mixing section 6 and the combustion section 7 are sequentially stacked. A vaporizing section 8 is provided near the mixing section 6 and the combustion section 7.
Is provided. Further, the air amount adjusting section 5 and the vaporizing section 8 are connected by a flow path forming member 70. In the present embodiment, the air amount adjusting unit 5 also functions as a rectifying unit.

To explain sequentially from the upper side, the blower 2
A fan 11 is rotatably arranged in a concave housing 10 formed by bending a steel plate. An opening 12 is provided in the center of the housing 10.

The drive mechanism 3 has a box 13, and a motor 16 is attached to the center of a top plate 15. The motor 16 has rotating shafts 17 and 18 projecting from both ends, and the rotating shafts 17 and 18 pass through substantially the entire length of the combustion device 1. As will be described later, the upper rotating shaft 17 of the motor 16 is connected to the fan 11 and the lower rotating shaft 1 is connected to the fan 11.
Reference numeral 8 is connected to a rotary cup (rotating member) 63 of the vaporizing section 8. Further, a temperature sensor 32 is provided in the drive mechanical unit 3.

As shown in FIG. 4, the air amount adjusting section 5 includes a movable plate member 23 and a fixed plate member 22. The moving-side plate member 23 has a disk shape as shown in FIGS. 4 and 11, and has a shaft insertion hole 25 at the center. Openings 26 and 27 serving as air holes are provided therearound. The openings 26 and 27 serving as air holes are provided so as to be roughly divided into inner and outer double areas. The openings 26 provided in the center area are substantially triangular, and are provided at twelve at equal intervals.

On the other hand, the number of openings 27 provided in the area surrounding the outside is twelve, and is a substantially rectangular groove shape. As described above, the moving side plate member 23 has two types of openings 2.
6, 27 are provided, but these peripheral sides are
Each of them is a circular arc having the same center as the center of the movable side plate member 23.

FIG. 7 shows a part of the movable plate member 23.
Is provided. The engaging portion 33 has a vertical wall 34 bent in a vertical direction from a portion where an opening is provided as shown in FIG. 7, and a cutout portion 44 is provided in the vertical wall 34.

On the other hand, the fixed-side plate-like member 2 of the air amount adjusting section 5
Reference numeral 2 denotes a rectangular plate body, the periphery of which is folded to provide a flange portion 24. The area of the fixed-side plate member 22 is larger than the above-mentioned movable-side plate member 23, and when the two are overlapped, the movable-side plate member 23 becomes the fixed-side plate member 22.
It is completely covered. Conversely, the fixed-side plate member 2
The end of 2 protrudes from the movable side plate-like member 23.

An opening having substantially the same shape as that of the movable side plate-like member 23 is provided at the center of the plate-like portion.
That is, the fixed side plate-shaped member 22 of the air amount adjusting section 5 is provided with a shaft insertion hole 25 ′ at the center. An opening serving as an air hole is provided around the periphery of the opening and divided into double areas. The openings 26 'provided in the center area are substantially triangular, and are provided at equal intervals of twelve. The outer area is also provided with twelve openings 27 ', each of which has a substantially rectangular groove shape. Many small holes 31 are provided in other portions of the fixed side plate-like member 22. The position where the small hole 31 is provided is a portion where the movable side plate member 23 does not overlap when the movable side plate member 23 is superimposed on the fixed side plate member 22. That is, the small hole 31 is provided in the protruding portion of the fixed-side plate member 22.

The fixed-side plate member 22 is provided with two vertical walls 28. The vertical walls 28 are further outside the aforementioned outer area and are parallel to each other. The two vertical walls 28 function as bearings.

As shown in FIGS. 3, 8 and 9, the air amount adjusting section 5 has a movable side plate member 23 superposed on a fixed side plate member 22. The air amount adjusting section 5 is generally planar. As shown in FIG. 7, a shaft 45 is inserted through the vertical wall 28 of the fixed-side plate-like member, and a driving member 46 is rotatably fixed to the shaft. Here, the driving member 46 is formed by bending a plate at six places, and as shown in FIG. 7, four vertical walls a, b, c, d and three horizontal walls e, f, g are connected alternately. The vertical wall b, c at the intermediate portion and the U-shaped portion surrounded by the horizontal wall f therebetween straddles the outside of the vertical wall 28 of the fixed-side plate member, and is fixed by the shaft 45 described above. I have. On the other hand, the horizontal wall g on one end side is engaged with the cutout portion 44 of the engagement portion 33 of the movable side plate-shaped member 23.

An engaging groove 49 is provided in the vertical wall a at the other end of the driving member 46. As shown in FIGS. 2 and 3, a motor 121 is externally attached to the housing of the combustion device 1, and a shaft of the motor 121 is engaged with an engagement groove 49 of the driving member 46 (the engagement state is shown in FIG. Not shown).

The movable plate member 23 is a fixed plate member 2.
2 and is relatively rotatable about a central shaft insertion hole 25. When the externally mounted motor 121 shown in FIGS. 2 and 3 is rotated, the driving member 46 swings about the shaft 45, and the horizontal wall g of the driving member 46 moves to engage the moving side plate member 23. The part 33 is moved. As a result, the movable side plate-like member 23 relatively rotates around the shaft insertion hole 25 at the center on the fixed side plate-like member 22. Due to the rotation of the movable side plate member 23, the area of the opening communicating the movable side plate member 23 and the fixed side plate member 22 changes.

The flow path forming member 70 is formed by bending a thin plate, and has a conical shape as shown in FIGS. The inside of the flow path forming member 70 is hollow and communicates vertically. That is, the flow path forming member 70 has the openings 54 at the upper and lower parts,
83 and both are in communication. The upper opening 54 of the flow path forming member 70 is equal to the diameter of the area on the center side of the moving side plate-like member 23 described above. The lower opening 83 is equal to the diameter of the central opening 37 of the flow dividing member 35 described later.
As described above, the flow path forming member 70 has a conical shape, and the upper opening 54 is considerably larger than the lower opening 83. More specifically, the diameter of the upper opening 54 is at least 1.5 times as large as that of the lower opening. Still more preferably, the diameter of the upper opening 54 is at least twice as large as that of the lower opening.

The upper and lower openings of the flow path forming member 70 are provided with flanges 55 and 56, respectively. A fuel pipe (fuel supply pipe) 79 is fixed inside the flow path forming member 70. That is, the fuel pipe 79 enters the flow path forming member 70 from the upper opening 54 side as shown in FIG. Here, at the introduction part of the fuel pipe 79 of the flow path forming member 70, as shown in FIG.
Is formed in a circular shape along the outer circumference of the. Further, the fuel pipe 79 is piped along the inner wall of the flow path forming member 70 by the attachment fitting 62 shown in FIG. That is, the fuel pipe 79 is piped along the generatrix of the flow path forming member 70 and in close contact with the inner wall of the flow path forming member 70.

The mixing section 6, the combustion section 7 and the vaporizing section 8 are constituted mainly by a flow dividing member 35 and a flame hole plate 36, in which a vaporizing chamber 60, a flame hole member 51, a mesh member 77 and an auxiliary flame member 78 are provided. It is provided and made. These components are housed in the housing 122.

That is, as shown in FIG. 14, the flow dividing member 35 is a rectangular plate-like member, and has a large opening 37 at the center. A small opening 4 around the periphery
A large number of 0, 89, 90 are provided. However, in the present embodiment, the small openings are distributed in two areas inside and outside. In other words, in the inner area surrounded by the dashed line,
Small openings 40 are provided in a row in the longitudinal direction. On the other hand, two rows and annular openings 89 and 90 are provided in the area outside the two-dot chain line. Dividing member 3
The area of No. 5 is larger than the area of the flame hole plate 36 described later.

The burner plate 36 is made of aluminum die-cast, has a rectangular shape as shown in FIGS. 15 and 16, and has a primary air supply tube 88 and inner walls 43 and 59 integrally formed therein. The flame hole plate 36 is provided with a complicated framework, openings and grooves. Flame plate 3
The upper surface side of 6 mainly functions as a flow path configuration surface for fuel gas and secondary air, and the lower surface side functions as a flame hole mounting surface. That is, the flame hole plate 36 has an outer combustion wall (outer wall portion) 41 surrounding the outer periphery. This outer combustion wall (outer wall portion) 41
Is a part where a flame is actually generated.
Function as The outer combustion wall (outer wall portion) 41 not only partitions the combustion portion 7 but also has a function of recovering heat and maintaining the flame hole plate 36 at a high temperature. Outer combustion wall (outer wall) 41
As shown in FIGS. 8, 23, 24, 28 and 29,
3 are provided.

Further, inside the outer combustion wall (outer wall portion) 41, as shown in FIGS.
There is provided a groove 48 which is partitioned by a groove. The vertical wall 50 that forms the groove 48 is shown in FIGS.
Each of the two sets constitutes a loop as shown in FIG.
5 are formed. That is, the outer combustion wall (outer wall portion) 41 has a closed groove 48a formed by a set of vertical walls 50 closed in a loop shape, and another open groove 48b. The island-shaped portion 75 is partially cut in the longitudinal direction as shown in FIGS. 8 and 26, and the grooves 48b of the portions other than the island-shaped portion communicate with each other at the cut 52.

As shown in FIGS. 8, 23, and 24, a ceiling wall 57 is provided on the upper surface side (flow path forming surface side) of the flame hole plate 36 except for a center portion and a cut portion of the island-shaped portion 75. Is provided. However, an opening 58 is provided in the ceiling wall 57 above the groove 48a of the island-shaped portion 75 constituted by the vertical wall 50 described above. There is no opening above the groove 48b in a portion where the vertical walls 50 do not constitute an island. Each groove 4
8 communicates with the lower surface side of the flame hole plate 36 (the flame hole mounting surface side). Therefore the trench 4 surrounded by islands
As shown in FIG. 29, the opening 58a is provided in the upper ceiling wall 57 and is also opened on the lower surface side (the flame hole mounting surface side), so that the flame hole plate 36 is moved vertically (in the thickness direction). ) Through. On the other hand, the groove 48b which does not constitute an island is closed on the upper side by the ceiling wall 57 as shown in FIG. 28 and communicates only with the lower side (flame hole mounting surface side). In addition, the bottom side (the flame hole mounting surface side) of the vertical wall 50 is connected to the cut 52 portion of the island-shaped portion 75, and a screw hole 38 for attaching the flame hole member 51 is provided in the portion. I have.

At the center of the flame hole plate 36, an opening 82 is provided.
Is provided. Eight ribs 66 are provided inside the opening 82, and a primary air supply cylinder 88 is supported at the center. In the combustion device 1 of the present embodiment, the primary air supply cylinder 88 and the rib 66 are formed integrally with the flame hole plate 36. That is, in the present embodiment, the primary air supply cylinder 88 is integrated with the main body of the flame hole plate 36 by the rib 66. In the present embodiment,
The primary air supply cylinder 88 is a cylinder having a constant cross-sectional area, and has a chamfered portion 108 (FIG. 25) formed outside the front end portion. The chamfered portion 108 extends from the inside to the outside of the primary air supply cylinder 88 and is inclined toward the other end. The upstream end of the primary air supply tube 88 is located at the position of the ceiling wall 57 provided in the groove 48b which does not constitute the island. In other words, one end of the primary air supply cylinder 88 is connected to the flame hole plate 36.
In the same position as the overall end of the. On the other hand, the terminal end 117 of the primary air supply cylinder 88 protrudes further downward from the lower surface side (the flame hole mounting surface side) of the flame hole plate 36.

An inner wall 43 extending in the longitudinal direction of the flame hole plate 36 is provided on the lower surface side (the flame hole mounting surface side) of the flame hole plate 36 and near the opening 82. The height of the inner wall 43 is equal to the height of the outer combustion wall (outer wall portion) 41 described above. The inner wall 43 has a flat plate shape as shown in FIGS.

Further, an inner wall 59 extending in the short direction of the flame hole plate 36 is provided on the lower surface side (the flame hole mounting surface side) of the flame hole plate 36 and near the opening 47 of the vaporizing chamber 60. . The inner wall 59 extending in the lateral direction is similar to that of FIG.
It has a block shape like 27 and 31 and has irregularities. That is, the inner wall 59 has a wall shape in which substantially rectangular projecting members are arranged in a line. These inner walls 43 and 59 are provided in the combustion section 7.
To keep the flame hole plate 36 warm and prevent re-liquefaction of fuel.

Next, the flame hole member 51 will be described. The flame hole member 51 has a substantially rectangular plate shape as shown in FIG. 18 and is provided with an opening 76 for a vaporization chamber, an air hole 71, a flame hole 72, and a mounting hole. That is, the flame hole member 51 has a substantially rectangular opening 76 for the vaporizing chamber at the center. In addition, the flame hole member 51
Is a large number of long holes (air holes) by pressing the plate
71 and a small hole (flame hole) 72 are provided, and a flame hole row a and an air hole row b are formed by these. That is, many long holes 71 shown in FIG. 18 are air holes. Slot (air hole) 7
1 are arranged in the longitudinal direction, and furthermore, they are provided over 10 rows. On the other hand, the small holes 72 function as flame holes. The small holes (flame holes) 72 have a small elongated hole shape as shown in the figure, and are provided in a staggered manner with respect to the center axis of the flame hole row a. In the present embodiment, eleven rows of flame holes a are provided, and are arranged alternately with the above-described air hole rows b.

The mesh member 77 is formed in a mesh shape with a thin metal thread, has substantially the same area as the above-mentioned flame hole member 51, and has a substantially rectangular shape as shown in FIG. An opening 69 is provided in the mesh member 77 at a position corresponding to the opening 76 for the vaporizing chamber of the flame hole member 51 described above. A portion of the mesh member 77 corresponding to the flame hole row of the above-described flame hole member 51 is provided with shallow grooves 155 in a row. Further, the mesh member 77 is provided with a long hole 73 at a position corresponding to the long hole (air hole) 71 of the flame hole member 51 described above. A sealant is applied around the long hole 73 (the shaded portion in FIG. 37). The portion where the sealant 74 is applied is in contact with the end face of the vertical wall 50 of the flame hole plate 36. Further, a mounting hole 151 is provided at a position corresponding to the mounting hole 150 of the flame hole member 51.

The auxiliary flame member 78 has a rectangular shape as shown in FIG. 20, and has an opening 68 at the center similarly to the flame hole member 51 and the mesh member 77 described above. In addition, the flame stabilizer 78
Is provided with round holes 67 arranged in a row with the long holes 65. The long hole 65 of the flame supplement member 78 is provided with the flame hole member 51 described above.
In the area corresponding to the area where the small holes 72 constituting the flame holes are provided. On the other hand, the round hole 67 is provided in a portion of the flame hole member 51 corresponding to the long hole (air hole) 71. Further, the periphery of the elongated hole 65 of the above-described flame-supplying member 78 is bent at about 45 ° as shown in FIG. The bent portion 68
Has an effect of holding the base end of the flame.

The flame hole member 51 is formed as shown in FIGS.
Flame hole plate 3 together with mesh member 77 and flame stabilizer 78
6 and is attached to the lower surface of the flame hole plate 36 by screws (not shown). That is, as shown in FIG. 30, the mesh member 77 is in contact with the flame hole plate, the flame hole member 51 is further superimposed on the mesh member 77, and finally the auxiliary flame member 78 is provided. The air hole array b of the flame hole member 51 is located immediately below the groove 48a formed by the island-shaped portion 75 formed by the vertical wall 50 of the flame hole plate 36.
A mesh member 77 is interposed between the air hole array b and the groove 48a formed by the island-shaped portion 75, and the portion corresponds to the long hole 73 of the mesh member 77 as shown in FIG. Further, a flame-supplying member 78 exists outside (at the lower side of) the air hole row b of the flame-hole member 51, and the round hole 67 of the flame-reinforcing member 78 is located at this portion. Therefore, the island-shaped portion 75 communicates with the outside through the elongated holes 73 of the net-like member 77, the air hole array b of the flame hole member 51, and the round holes 67 of the auxiliary flame member 78.

On the other hand, the flame hole row a of the flame hole member 51 is located immediately below the groove 48b sandwiched by the vertical walls 50 in a combination that does not form an island shape. A mesh member 77 is interposed between the flame hole array a of the flame hole member 51 and the groove 48b sandwiched by the vertical walls 50 in a combination that does not form an island shape. Further, a flame-supplying member 78 exists outside the flame-hole row a of the flame-hole member 51 (lower side).
Is located. Therefore, the portions of the combination that do not form an island shape are the mesh of the mesh member 77 and the flame hole member 5.
It communicates with the outside through the one flame hole row a and the long hole 65 of the auxiliary flame member 78. Here, since a sealant is applied to a portion of the mesh member 77 which comes into contact with the end face of the vertical wall 50 of the flame hole plate 36, there is no gas flowing in the vertical wall 50 at the horizontal direction.

A flow dividing member 35 is mounted on the upper surface side (flow path forming surface side) of the flame hole plate 36 as shown in FIG.
The area of the flow dividing member 35 is larger than the flame hole plate 36 as described above, and the flow dividing member 35 protrudes from the flame hole plate as shown in FIG. Since the ceiling wall 57 is provided on the upper surface side (flow path configuration surface side) of the flame hole plate 36, the flow dividing member 35 is in contact with the ceiling wall 57. The primary air supply cylinder 88 integrally formed with the flame hole plate 36 is
Since the upstream end is at the height of the ceiling wall 57, the flow dividing member 35 is in contact with the end of the primary air supply tube 88, and the large opening 37 at the center of the flow dividing member 35 is provided at the center of the flame hole plate 36. The primary air supply cylinder 88 communicates with the designated primary air supply cylinder 88. In the combustion device 1 of the present embodiment, since the one end of the primary air supply cylinder 88 is provided at the same position as the entire end of the flame hole plate 36 in this manner, the attachment of the flow dividing member 35 is easy.

The upper surface side of the flame hole plate 36 (the passage forming side)
As described above, two sets of the vertical wall 50 form a loop as shown in FIGS. 4 and 18, forming an island-like portion 75, and furthermore, the flow dividing member 35 is provided at the protruding end of the vertical wall 50. Since they are in contact with each other, the groove 48a formed by the island-shaped portion 75 is isolated from other portions. That is, there is no air permeability between the groove 48a of the island-shaped portion 75 and another portion. Therefore, as described above, the portions other than the island-shaped portion 75 function as a flow path for sending the mixed gas to the flame hole member 51 while promoting the mixing of the vaporized fuel gas and the air. The site is
It also functions as the mixing section 6. The groove 48a surrounded by the island-shaped portion 75 functions as a secondary air flow path.

The large opening 37 at the center of the flow dividing member 35
As described above, it communicates with the primary air supply cylinder 88 provided at the center of the flame hole plate 36. Of the other openings 40, 89, 90 of the flow dividing member 35, the openings 40 provided in a row are located at positions between the vertical walls 50 of the combination forming the island shape of the flame hole plate 36. I do. That is, the small opening 40 of the flow dividing member 35 opens in the groove 48a surrounded by the island-shaped portion 75 as the secondary air flow path. There is no opening of the flow dividing member 35 between the vertical walls of the combination provided in the flame hole member 51 and not forming an island shape. That is, there is no opening of the flow dividing member 35 in the mixing section 6.

The area of the flow dividing member 35 is larger than that of the flame hole plate 36 as described above. When the flow dividing member 35 is mounted on the flame hole plate 36, as shown in FIG. Protrude from the plate. In this state, the opening 8 provided in the area outside the flow dividing member 35 is provided.
9 and 90 are both exposed outside the flame hole plate 36.

The flame hole plate 36 and the flow dividing member 35 are combined in the above-described state, and are arranged in the housing 122. The housing 122 is a box having a substantially rectangular outer shape, but has a double structure inside. That is, the heat shield wall 85 is provided on the entire surface inside the housing 122. The heat shield wall 85 has a quadrangular cylindrical shape with four surfaces combined, and is attached to the inner surface of the outer wall portion 100 of the housing 122 by the support member 86. The lower end of the heat shield wall 85 is folded inward by 90 ° to form an inwardly facing flange 102. Housing 122
Between the outer wall portion 100 and the heat shield wall 85.
1 is formed.

The flame hole plate 36 and the flow dividing member 35 are arranged in the housing 122 described above.
The outer combustion wall (outer wall portion) 41 surrounding the outer periphery of 6 is even smaller than the heat shield wall 85 inside the housing 122, and also between the outer combustion wall (outer wall portion) 41 of the flame hole plate 36 and the heat shield wall 85. An air gap serving as the air flow path 103 is formed. Of the holes 89, 90 of the flow dividing member 35 protruding from the flame hole plate 36, the outer holes 90 communicate with the air flow path 101 formed between the housing 122 and the heat shield wall 85,
The inner hole 89 is provided in the air passage 103 formed between the outer combustion wall (outer wall) 41 of the flame hole plate 36 and the heat shield wall 85.
Communicate with

Next, the vaporizing section 8 will be described. Vaporization section 8
Are a vaporization chamber 60 and a rotary cup (rotating member) 63
It is constituted by. The vaporization chamber 60 is shown in FIG.
It is a cylindrical body having a bottom part 91 and a peripheral part 92 like 4, 8, 27, the bottom part 91 is closed, and the upper part is open. That is, the vaporization chamber 60 has a depressed shape, and has a bottom 91 and a peripheral portion 9.
2 is closed and airtight and watertight, and the upper part is open. The vaporization chamber 60 has the bottom portion 91 and the peripheral portion 92 as described above, and has a shape like a cup. As shown in FIGS. 3, 4, 8, and 27, the central opening 82 of the flame hole plate 36 is provided. Attached to the part. The position of the vaporization chamber 60 is a portion surrounded by the inner wall 43 of the flame hole plate 36 and at the center of the flame hole plate 36, surrounded by the flame holes (small holes 72), and close to the combustion portion 7. To position. Most of the vaporization chamber 60 is exposed to the combustion section 7 side. More specifically, the entire bottom part 91 of the vaporization chamber 60 and most of the peripheral part 92 are exposed to the combustion part 7 side. Therefore, as described later, the flame generated from the flame holes (small holes 72) during combustion causes the vaporization chamber 6
0 is heated from the outside. Opening end face 1 of vaporization chamber 60
Reference numeral 25 contacts the plane portion of the flame hole plate 36 as shown in FIGS.

The electric heater 64 is built in the bottom 91 of the vaporizing chamber 60. That is, the vaporization chamber 60
Has a heating function. When the electric heater 64 is energized, the bottom portion 91 generates heat, and this heat is conducted through the wall of the vaporization chamber 60, so that the inner wall of the vaporization chamber 60 is entirely heated. A temperature sensor 61 is embedded in the vaporization chamber 60.

The rotary cup 63 has a bottomed cylindrical shape having a bottom portion 91 and a peripheral portion 92. However, nine holes are provided at the bottom of the rotary cup 63. Among them, the hole 95 provided in the center has a semicircular shape, and the rotary shaft 18 is attached as shown in FIG. On the other hand, the nine surrounding holes 87 are circular and are holes for dropping liquid fuel such as kerosene. Also, at the corner of the boundary between the bottom and the periphery of the rotary cup 63, 12
Openings 97 are provided.

Further, on the periphery of the rotary cup 63,
Twelve slits 98 are provided. Slit 98
Are open at the upper end side of the rotary cup 63. The shape of the slit 98 is substantially triangular. Further, on one side of the slit, there is provided a blade portion 99 which is folded inward as shown in FIGS. That is, the slit 98 is formed by forming a slit in the oblique direction on the side surface of the rotary cup 63 and folding one edge of the slit inward to form the blade portion 99.

A primary air supply cylinder 88 is inserted into an opening 87 at the lower center of the rotary cup 63.
That is, as described above, the opening 82 is provided in the center of the flame hole plate 36, and the primary air supply cylinder 88 is integrally provided via the eight ribs 66. And the vaporization chamber 60
Is a cup-shaped opening 8 at the center of the flame hole plate 36.
Since the primary air supply cylinder 88 is attached to the two parts, the primary air supply cylinder 88 is inserted into the vaporization chamber 60 from the opening 116 of the vaporization chamber 60. At this time, the primary air supply cylinder 88 is connected to the vaporization chamber 60.
And concentrically located. Therefore, a mixed gas discharge gap 107 is formed between the primary air supply cylinder 88 and the inner wall of the vaporization chamber 60. Here, in the combustion device 1 of the present embodiment, when the cross-sectional area P1 of the primary air supply cylinder 88 is compared with the cross-sectional area P2 of the mixed gas discharge gap 107, the cross-sectional area P1 of the primary air supply cylinder 88 is higher than that of the mixed gas discharge. It is larger than the cross-sectional area P2 of the gap 107. That is, when the opening diameter of the vaporizing chamber 60 is D and the opening diameter of the primary air supply cylinder 88 is d, (πd ² /
4)> - a relationship of ^{[(πD 2/4) (πd} 2/4) ]. When the primary air supply cylinder 88 is tapered or the like and the cross-sectional shape is not constant, the average cross-sectional area of the primary air supply cylinder 88 is compared with the cross-sectional area P2 of the mixed gas discharge gap 107 at the opening end. In any case, it is recommended that the cross-sectional area P1 of the primary air supply cylinder 88 be at least 20% larger than the cross-sectional area P2 of the mixed gas discharge gap 107.

The position of the leading end (lower side) of the primary air supply cylinder 88 is located inside the vaporization chamber 60. More specifically, the open end 117 of the primary air supply cylinder 88 is
In the vaporization chamber 60, it protrudes from the opening surface 42 of the flame hole toward the flame generating portion side (lower side in the drawing) of the combustion portion 7 as shown in FIG.
As described above, since the chamfered portion 108 (FIG. 25) is formed on the outside at the tip end portion of the primary air supply cylinder 88, the open end 117 of the primary air supply cylinder 88 is
8, it is inclined from the inside to the outside toward the opening of the vaporization chamber 60.

A fuel pipe 79 hanging from the flow path forming member 70 is inserted into the primary air supply cylinder 88, and the fuel pipe 79 reaches the inside of the rotary cup 63 as shown in FIGS. More specifically, the fuel pipe 79 hangs straight down from the opening at the top of the rotary cup 63 and reaches inside the rotary cup 63 from above. Then, liquid fuel such as kerosene is dropped from the fuel pipe 79 to the bottom of the rotary cup 63.

Next, the assembly structure of each part of the combustion device 1 of the present embodiment will be described. Combustion device 1 of the present embodiment
As described first, the blower 2, the drive mechanical unit 3, and the air amount adjusting unit 5 are sequentially stacked with their central axes aligned, and the blower 2 is directly mounted on the top plate 15 of the drive mechanical unit 3. It is screwed on. That is, in the present embodiment, the rotation center of the blower 2, the shaft insertion hole 25 (the rotation center of the movable side plate member 23) of the air amount adjusting unit 5, and the rotation center of the rotary cup 63 are linearly arranged on the same axis. I have.

An air amount adjusting section 5 is screwed to the upper portion of the driving mechanical section 3. A mixing section 6 and a combustion section 7 are provided below the air amount adjusting section 5, and the diversion member 35, which is a boundary between the mixing section 6 and the air amount adjusting section 5, has a conical flow path forming member 70. Is provided. That is, as described above, the larger opening 54 of the flow path forming member 70 is attached to the center of the air amount adjusting section 5 via the packing 80. On the other hand, the smaller opening 83 of the air amount adjusting section 5 is connected to the opening 37 at the center of the flow dividing member 35 via a packing 81. These packings 80, 8
It is desirable that No. 1 has excellent heat insulation properties and does not penetrate liquid fuel such as kerosene. Specifically, packing materials include:
Silicon is adopted.

The central axis of the flow path forming member 70 coincides with that of the moving side plate member 23 of the air amount adjusting section 5, and the diameter of the opening 54 of the flow path forming member 70 is Since the diameter is substantially equal to the diameter of the area on the center side of 23, the flow path forming member 70 is located so as to cover the area on the center side of the movable plate member 23. Therefore, the air discharged from the area on the center side of the movable plate member 23 is captured by the flow path forming member 70. Further, a flange 55 is provided at an open end of the flow path forming member 70, and a packing 80 is interposed between the flange 55 and the air amount adjusting portion 5, so that there is no air leakage, and Member 2
The air discharged from the area on the center side of 3 enters the flow path forming member 70 without leakage. The other opening 83 of the flow path forming member 70 is connected to the flow dividing member 35 via the packing 81.
, And directly communicates with the primary air supply cylinder 88 described above, and the primary air supply cylinder 88 is directly opened into the vaporization chamber 60 of the vaporization section 8 as described above. Therefore, the air discharged from the group of openings in the area on the center side of the movable side plate-like member 23 is mainly captured by the flow path forming member 70 as described above, and is directly passed through the primary air supply tube 88. Is introduced as primary air into the vaporization chamber 60.

The rotating shaft 1 of the motor 16 of the driving mechanism 3
Numeral 8 communicates with the shaft insertion holes 25 and 25 ′ at the center of the air amount adjusting section 5, passes through the flow path forming member 70 (primary air supply cylinder 88), and is connected to the rotary cup 63 of the vaporization chamber 60. . Therefore, the rotary cup 63 is rotated by the power of the motor 16. Further, since the rotating shaft 17 on the rear end side of the motor 16 is also connected to the fan 11, in the present embodiment, both the rotary cup 63 of the vaporizing section 8 and the fan 11 are driven by the single motor 16. . Since the shaft insertion hole 25 is also the center of rotation of the movable side plate member 23, it does not move when the movable side plate member 23 rotates. Therefore, even if the rotation shaft 18 of the motor 16 is provided in the shaft insertion holes 25 and 25 ′, the rotation of the movable plate member 23 is not hindered.

The wiring of the electric heater 64 and the vaporization chamber 60
The pipe of the temperature sensor 61 passes through a gap 105 between the air amount adjusting section 5 and the flow dividing member 35, and is drawn out from an opening 106 (FIG. 2) provided on a side surface. More specifically, an opening 10 as shown in FIG. 2B is provided on a side surface of the box 13 and at an intermediate portion between the air amount adjusting portion 5 and the flow dividing member 35.
6 are provided. The shape of the opening 106 is a combination of a large rectangular portion 110 and a small circular portion 111. Then, a rectangular lid 112 is attached to the large rectangular portion 110 by screws (not shown). on the other hand,
A rubber attachment 113 is fitted into the circular portion 111. The mounting tool 113 has a disk shape, and has a groove 114 on the outer peripheral portion where the end of the circular hole fits, and a through hole 115 in the center.

When assembling the parts, the mounting tool 1
The wirings 116 such as the electric heater 64 are passed through the holes 13 and the wirings 116 are drawn out from the rectangular portion 110 having a large area. Then, the mounting tool 113 is fitted into the small circular portion 111, and the rectangular lid 112 is finally closed.

The air gap 105 between the air amount adjusting section 5 and the flow dividing member 35 is a region through which air is blown, and therefore has a relatively low temperature. For this reason, the coating of the pipe such as the electric heater 64 needs only to have low heat resistance.

The combustion device 1 of this embodiment is used with the flame hole facing downward. Hereinafter, the mounting direction of the combustion device 1 will be described. The combustion device 1 of the present embodiment is used for a water heater 21 as shown in FIG. The combustion device 1 includes a heat exchanger 1
9 is installed on the upper part of the can 4 in which the flame 9 is built, and generates a flame toward the lower heat exchanger 19.

Next, the function of the combustion device 1 of the present embodiment will be described. In the combustion device 1 of the present embodiment, the motor 16
Is started to rotate the fan 11 and the rotary cup 63. By the rotation of the fan 11, air is sucked through an opening 12 provided at the center of the housing 10 of the blower 2 as shown by an arrow in FIG. Then, the air flows from the driving mechanical unit 3 to the mixing unit 6 side via the upper air amount adjusting unit 5, but in the combustion device 1 of the present embodiment, the flow rate is adjusted by the air amount adjusting unit 5.

That is, as described above, the air amount adjusting section 5 has the movable side plate member 23 rotatably superimposed on the fixed side plate member 22, and the openings 26, 2 of substantially the same shape are provided on both sides.
6'27, 27 'are provided. The movable side plate-like member 23 can rotate relative to the fixed side plate-like member 22 by rotating a motor 121 attached to the outside. Therefore, as shown in FIG. 13, when the two openings 26, 26'27, 27 'are in a rotational position where they overlap, the two openings 26, 26'27, 27' communicate with each other, and Has a large opening area. Therefore, when the movable side plate member 23 is in a positional relationship as shown in FIG. 12 with respect to the fixed side plate member 22, a large amount of air is blown to the mixing section 6 and the vaporizing section 8. FIG. 1
When the air amount adjusting unit 5 as shown in 2 is fully open, the opening area of the area on the center side of the air amount adjusting unit 5 is about twice as large as the opening area of other parts.

Conversely, from the position shown in FIG.
When the movable side 1 is rotated to rotate the movable side plate-like member 23, one opening and the other closing part overlap, and the opening area of the entire air amount adjusting unit 5 is reduced. Therefore, the movable side plate member 2
When 3 is in a positional relationship as shown in FIG. 13 with respect to the fixed side plate member 22, the amount of air blown to the mixing section 6 and the vaporizing section 8 decreases. However, the openings 31 provided on both sides of the fixed-side plate member 22 are fixed and are not closed, so that the opening ratio on the center side is relatively reduced, and The proportion of air blown is reduced. As shown in FIG. 13, the opening area of the area in the closed state is about one-fourth of the opening area of other parts.

In the combustion apparatus 1 of this embodiment, when the blower 2 blows a large amount of air, the air amount adjusting unit 5 is opened to discharge air at a high rate from the central area. As a result, air is introduced into the vaporization section 8 at a high rate. On the other hand, when the blowing amount of the blower 2 is small, the air amount adjusting unit 5 is closed as shown in FIG. 13 to increase the ratio of the air discharged from a portion other than the center side. Then, the ratio of the primary air decreases, and the ratio of the secondary air increases.

The air that has passed through the air amount adjusting section 5 flows downstream in two directions. That is, the air that has passed through the central area is directly captured by the conical flow path forming member 70, and is blown into the vaporization chamber 60 from the primary air supply cylinder 88 communicating therewith. Here, the combustion device 1 of the present embodiment
Then, the flow path forming member 70 is provided with the opening 5 on the air amount adjusting section 5 side.
4 is larger than the opening 83 on the vaporizing section side, a large amount of air is taken into the flow path forming member 70 and sent to the vaporizing section 8 side. Functionally speaking, the air amount adjusting unit 5
A part of the whole air blown from the blower 2 is separated as primary air by the group of openings in the area on the center side of the air flow and enters the upper opening 54 of the flow path forming member 70 having a large area. Then, while flowing through the flow path forming member 70, the wind speed increases, and the flow dividing member 3
5 enters the primary air supply cylinder 88 through the opening 37, and
0 is supplied. In the present embodiment, the flow path forming member 7
Since 0 is conical and the inside is tapered, vortex loss and the like when air passes through are small, and the flow of air is smooth. Furthermore, in the combustion device 1 of the present embodiment, since the fuel pipe 79 is fixed inside the flow path forming member 70 along the generatrix, the fuel pipe 79 does not hinder the blowing. Therefore, the pattern of the air entering the vaporization chamber 60 is uniform. In the combustion device 1 of the present embodiment, since the fuel pipe 79 is firmly fixed, the fuel pipe 79 is not shaken, and the pattern of the air entering the vaporization chamber 60 does not change.

The air that has entered the primary air supply cylinder 88 from the flow path forming member 70 is applied to the open end 11 of the primary air supply cylinder 88.
7, the air is blown into the vaporization chamber 60, mixed with the fuel gas and discharged from the mixed gas discharge gap 107 of the vaporization chamber 60, as described later, so that the direction is largely changed inside the vaporization chamber 60. In the embodiment, since the chamfered portion 108 is provided at the opening end 117 of the primary air supply cylinder 88,
Channel resistance is low.

Another part of the blower is formed by combining a large number of small-diameter openings 40 provided in the flow dividing member 35 with a large number of small-diameter openings 40 to form a combination of vertical walls 50 forming an island-shaped loop of the flame hole plate 36. It flows into the groove 48a between them. That is, the secondary air is supplied to the combustion unit 7 through the opening 40 and the groove 48 a provided in the flow dividing member 35. More specifically, secondary to the combustion part 7 via the row-shaped openings 40 of the flow dividing member 35, the long holes 73 of the net-like member 77, the air hole row b of the flame hole member 51, and the round holes 67 of the auxiliary flame member 78. Air is supplied.

Further, the air blown through the openings 89 and 90 provided in the area outside the flow dividing member 35 flows through the outer peripheral portion of the flame hole plate 36. Specifically, the air blown through the inner opening 89 is supplied to the air passage 103 formed between the outer combustion wall (outer wall portion) 41 of the flame hole plate 36 and the heat shield wall 85.
And a flange 102 provided at the lower end of the heat shield wall 85.
Then, it turns to the inside of the flame hole plate 36 and flows toward the combustion part 7 side. Part of the air flowing through the air passage 103 also flows into the inside of the flame hole plate 36 from a hole 53 provided in the outer combustion wall (outer wall portion) 41. The air flowing through the air passage 103 formed between the outer combustion wall (outer wall portion) 41 of the flame hole plate 36 and the heat shield wall 85 has a function of cooling the heat shield wall 85. This air collides with the flange 102 and turns to the inside of the flame hole plate 36, and most of the air is consumed as secondary air.
Most of the air flowing into the inside of the flame hole plate 36 from the holes 53 provided in the outer combustion wall (outer wall portion) 41 also contributes to combustion as secondary air.

Further, the air blown through the opening 90 outside the flow dividing member 35 flows through the air flow path 101 formed between the outer wall portion 100 of the housing 122 and the heat shield wall 85. The air flowing through the air flow path 101 is mainly
The function of cooling the outer wall portion 22 and the outer wall of the lower heat exchanger.

Then, a large amount of primary air is introduced into the vaporizing section 8 by the blowing of the blower 2 as described above.
A ventilation atmosphere is used. Further, the electric heater 64 incorporated in the peripheral portion 92 is energized to generate heat, and the entire inner wall of the vaporization chamber 60 is heated. In this state, kerosene is dropped from the fuel pipe 79 into the rotary cup 63. The dropped kerosene receives centrifugal force from the rotary cup 63 and scatters from the slit 98 and the opening 97 at the corner of the rotary cup. And the scattered kerosene is a rotary cup 6
It contacts the inner surface of the vaporization chamber 60 disposed around the periphery 3 and receives heat to vaporize. Further, a part of the kerosene falls from the hole 87 at the bottom of the rotary cup to the bottom 91 of the vaporization chamber 60 before reaching the slit 98 and the opening 97 at the corner by centrifugal force, and contacts the bottom 91 of the vaporization chamber 60. Evaporates due to heat. The air in the vaporization chamber 60 is agitated by the blades 99 provided on the inner surface of the rotary cup 63, and the mixing of the fuel gas and the air is promoted.

The mixed gas thus generated flows downstream through a gap 94 formed by the outer wall of the rotary cup 63 and the peripheral wall 92 of the vaporization chamber 60 as shown by the arrow in FIG. That is, the mixed gas once flows upward along the cylindrical peripheral wall 92 of the vaporization chamber 60. Here, since the primary air supply cylinder 88 is inserted near the opening of the vaporization chamber 60, the flow path of the mixed gas is extremely narrow. Specifically, in the combustion device 1 of the present embodiment, when the sectional area P1 of the primary air supply cylinder 88 is compared with the sectional area P2 of the mixed gas discharge gap 107, the sectional area P1 of the primary air supply cylinder 88 is larger. Mixed gas discharge gap 1
07 is larger than the cross-sectional area P2. Therefore, the stirring of the mixed gas further proceeds at the relevant site.

The air thus supplied from the flow path forming member 70 into the vaporization chamber 60 via the primary air supply cylinder 88 is mixed with the scattered fuel, becomes a high temperature state, and has an opening above the vaporization chamber 60. It is discharged from 84. Then, the mixed gas that has left the vaporization chamber 60 flows into the passage on the upper side of the flame hole plate 36 once.

Then, the mixed gas flows into the groove 48b between the vertical walls 50 in a combination that does not form an island-like loop as shown in FIGS. As described above, the fuel gas is released from the flame holes (small holes 72) provided at the lower part. In this embodiment, since the mesh member 77 is stacked on the flame hole member 55, the fuel gas is stirred by the mesh member 77 immediately before being discharged from the flame hole member 55. In addition,
Since the sealant is applied to the portion of the mesh member 77 that comes into contact with the end face of the vertical wall 50 of the flame hole plate 36, the vertical wall 5
There is no lateral flow of gas at the zero point, and the entire amount of fuel gas is discharged from the flame holes (small holes 72) without escaping laterally.

On the other hand, the air that has flowed downstream from other portions flows directly into the combustion section 7 without being mixed with fuel, and contributes to combustion as secondary air. That is, the secondary air flows from the multiple openings 40 provided in the flow dividing member 35 to the grooves 48a between the vertical walls 50 of the combination forming the loop of the flame hole plate 36, and the secondary air flows into the flame holes (small holes 72). Supplied to the side.

As described above, the air flow path formed between the outer combustion wall (outer wall portion) 41 of the flame hole plate 36 and the heat shield wall 85 from the opening 89 provided in the area outside the flow dividing member 35. Air flowing through the opening 103 and the opening 9 of the flow dividing member 35.
The air flowing from 0 to the air flow path 101 formed between the outer wall portion 100 of the housing 122 and the heat shield wall 85 also functions as secondary air. Particularly, part of the air flowing through the air flow passage 103 formed between the outer combustion wall (outer wall portion) 41 and the heat shield wall 85 via the opening 89 of the flow dividing member 35 is partly the outer combustion wall (outer wall portion). 41 also flows into the inside of the flame hole plate 36 from the holes 53 provided in the hole 41, and the remaining portion is a folded portion (flange 10) provided at the lower end of the heat shield wall 85.
Since it collides with 2) and flows to the combustion section 7 side, the ratio of consumption as secondary air is high.

When the ignition device ignites the fuel gas, a downward flame is generated from the flame holes (small holes 72).

Here, in the combustion device 1 of the present embodiment, since the vaporization section 8 is directly exposed to the center of the combustion section 7,
When the combustion starts, the vaporization chamber 60 is heated by the flame. That is, most of the vaporization chamber 60 is the flame hole plate 3
6 and protrudes from the opening 42 of the flame hole to the flame generating portion side (the lower side in the drawing) of the combustion portion 7. Therefore, the vaporization chamber 60 is directly heated by the flame, the temperature in the vaporization chamber 60 increases, and the vaporization of the fuel is further promoted. Also, the inner wall 43, 5
9 are provided, which receive heat from the combustion section 7 to keep the flame hole plate 36 warm and prevent re-liquefaction of fuel. That is, the inner walls 43 and 59 are also within the flame hole distribution region of the flame hole plate 36, and protrude beyond the opening surface 42 of the flame hole toward the flame generating portion (lower side in the drawing) of the combustion portion 7. Therefore, the inner walls 43 and 59 are directly heated by the flame and become high temperature. In particular, in the present embodiment, the inner walls 43 and 59 are provided near the vaporization chamber 60, and the inner walls 43 and 5 are located immediately below the flow path where the mixed gas flows immediately after leaving the vaporization chamber 60.
9 is located. Therefore, the flow path of the mixed gas is heated positively, and re-liquefaction of the fuel is prevented.

Further, since the opening end face 125 in the vaporization chamber 60 is in contact with the flame hole plate 36, heat is also transferred from the flame hole plate 36 to the vaporization chamber 60. As described above, the inner wall 43,
Since 59 is provided near the vaporizing chamber 60, the temperature of the portion of the flame hole plate 36 in contact with the vaporizing chamber 60 is considerably high, and contributes to the temperature rise of the vaporizing chamber 60. In addition, in the present embodiment, the flow path forming member 70 is a packing 80 having excellent heat insulating properties.
The heat of the mixing section and the fuel gas flow path does not escape to the flow path forming member 70 because the flow path is attached to the flow dividing member 35 which is a part of the mixing section through the flow path. Therefore, reliquefaction of the fuel is less likely to occur. Even if the fuel is reliquefied, the packing 80
Since no oil fuel such as kerosene is impregnated, there is no fear of burnout.

In addition, in the combustion apparatus 1 of the present embodiment, the primary air supply cylinder 88 is also integrated with the flame hole plate 36, so that when the temperature of the flame hole plate 36 rises due to combustion, it is introduced into the vaporization chamber 60. The temperature of the air is also increased. Therefore, in the combustion device 1 of the present embodiment, the fuel vaporization state is stable. In particular, in this embodiment, the primary air supply cylinder 88 has the start end at the same position as the entire end of the flame hole plate 36, and the end side 117 has the flame hole plate 3.
6 protrudes further downward from the lower surface side (flame hole mounting surface side), the total length of the primary air supply cylinder 88 is long. Therefore, the primary air is heated for a relatively long time by the heat transmitted from the flame hole plate 36, and the temperature of the air introduced into the vaporization chamber 60 is also increased.

Furthermore, in the present embodiment, the primary air supply cylinder 8
An open end of the vaporization chamber 8 in the vaporization chamber 60 is located inside the vaporization chamber 60. Therefore, the part where the primary air supply cylinder 88 opens is the part where the vaporization chamber 60 is directly heated by the flame, and is the part with the highest temperature. Therefore, the fuel is efficiently vaporized.

Further, in the combustion apparatus 1 of the present embodiment, the externally mounted motor 121 is rotated in accordance with a change in the combustion output, and the opening amount of the air amount adjusting section 5 is changed. That is, when the amount of combustion increases and the amount of air generated by the blower 2 is large, the motor 121 is rotated to open the openings 26, 26 ′ 27, 27 ′, 28 of the fixed-side plate member 22 and the movable-side plate member 23. The movable side plate-like member 23 is turned in the direction of communication. As a result, not only does the amount of air contributing to combustion increase, but also the ratio of primary air supplied to the vaporizing section 8 increases. As a result, the flame hole 7
The concentration of the fuel gas released from 2 decreases.

On the other hand, when the amount of combustion decreases and the amount of air generated by the blower 2 decreases, the opening 2
The movable side plate-like member 23 is turned in a direction in which 6, 27 and 28 are aligned with the closed portion of the fixed side plate-like member 22. As a result, not only does the amount of air contributing to combustion decrease, but also the proportion of primary air supplied to the vaporizing section 8 decreases. That is, the concentration of the fuel gas to be released is increased, and the air supplied around the fuel gas is relatively increased. As described above, when the high output combustion is performed, the ratio of the primary air supplied to the vaporization unit 8 is increased, and when the low output combustion is performed, the ratio of the primary air is reduced, so that the NO _X is reduced. (Nitrogen oxides) emissions can be reduced.

In the embodiment described above, the inner walls 43 and 59 are provided in the vaporization chamber 60, and the flame hole plate 36 is kept warm to re-liquefy the fuel. In the present embodiment, the inner wall 43 extending in the longitudinal direction of the flame hole plate 36 is a flat plate, and the inner wall 59 of the flame hole plate 36 extending in the lateral direction is a block. However, all the inner walls may be plate-shaped or block-shaped. Alternatively, an inner wall 109 as shown in FIG. 32 in which a plate and a block are compromised can be adopted. The inner wall 109 is a flat wall on the outer wall side, and has an uneven shape on the inner wall side. That is, grooves 119 extending in the vertical direction are provided at regular intervals in the uneven shape on the inner wall side. Further, a fin-shaped protruding member may be employed instead of the wall-shaped protruding member.

[0108]

As described above, the combustion apparatus according to any one of the first to sixth aspects has a flame hole plate for distributing the flame holes in a plane, and the flame hole plate has a flame hole in the flame hole distribution region. Since the projecting member projecting toward the flame generating portion from the opening surface is provided, the temperature of the flame plate increases, the fuel gas is heated, and reliquefaction is prevented. Therefore, the combustion device of the present invention has an effect of stabilizing combustion.

In particular, in the combustion apparatus according to the second aspect, since the protruding member is provided in the flame hole distribution region, the temperature of the flame hole plate is further increased, and the fuel gas flow path is kept warm. In addition, in the combustion device of the present invention, a part or the whole of the vaporizing part is in contact with the flame hole plate. As a result, the temperature of the vaporizing section rises, vaporization of the liquid fuel is promoted, and combustion is stabilized.

In the combustion apparatus according to the third aspect,
Since the projecting member is provided in the vicinity of the vaporizing section, much of the heat is conducted to the vaporizing section, the temperature of the vaporizing section rises, the vaporization of the liquid fuel is promoted, and the combustion is stabilized.

In the combustion device according to the fourth aspect, since the projecting member is arranged in a wall shape, it receives heat over a wide area,
There is an effect that a large amount of heat can be transmitted to the fuel gas flow path and the vaporizing section.

Further, in the combustion apparatus according to the fifth aspect, heat can be received over a large surface area by the unevenness, and a large amount of heat can be transmitted to the fuel gas flow path and the vaporizing section.

Further, in the combustion apparatus according to the sixth aspect, since the flame hole plate has the outer wall surrounding the flame distribution area, not only does heat not escape to the outside, but also the flame hole plate is kept warm by the outer wall. . Further, in the present invention, since the projecting member is provided at a portion surrounded by the outer wall portion, the projecting member is exposed to a higher temperature, and the effect of increasing the temperature of the fuel gas flow path and the vaporizing section is high.

Furthermore, in the combustion apparatus according to the seventh and tenth aspects, since a part of the vaporization chamber is in the flame hole distribution region of the flame hole plate, the vaporization chamber is directly heated by the flame generated from the flame hole plate. As a result, the temperature of the vaporizing section rises, and the vaporization of the liquid fuel is promoted. In addition, in the combustion device of the present invention,
The open end of the air supply cylinder is located in the vaporization chamber and protrudes from the opening surface of the flame hole toward the flame generating portion. Therefore, in the present invention, the air supplied to the vaporization chamber is supplied to a portion where the temperature becomes higher even in the vaporization chamber, and the fuel is vaporized efficiently and the combustion is stabilized.

In the combustion apparatus according to the eighth and tenth aspects, the outlet side of the vaporization chamber is narrowed, and the mixed gases are agitated when discharged from the vaporization chamber to promote mixing and homogenization. . Therefore, the combustion device of the present invention burns stably.

Further, the combustion apparatus according to the ninth aspect has a flame hole plate for distributing the flame holes in a plane, and a part of the vaporization chamber is in the flame hole distribution region of the flame hole plate. The liquid fuel is directly heated by the flame generated from the flame hole plate, and the temperature of the vaporizing section rises, thereby promoting the vaporization of the liquid fuel. Therefore, the combustion device of the present invention burns stably.

In the combustion device according to the eleventh aspect, the open end of the air supply cylinder in the vaporization chamber is inclined from the inside to the outside toward the opening of the vaporization chamber, so that the flow path resistance is small and the blower A low static pressure is sufficient.

Further, in the combustion device according to the twelfth aspect, since the air supply cylinder is formed integrally with the flame hole plate, the temperature of the air supplied to the vaporization chamber rises, and the vaporization of the liquid fuel is performed. Is promoted. In the combustion device of the present invention,
Since the air supply cylinder is integrated with the flame hole plate, there is an effect that the number of parts is small and assembly is easy.

In the combustion device according to the thirteenth aspect, a part or the whole of the vaporization chamber is in contact with the flame hole plate or is integrally formed.
The heat of the flame plate is transferred to the vaporization chamber. Therefore, the temperature of the vaporization chamber rises, and the vaporization of the liquid fuel is promoted. Therefore, the combustion device of the present invention burns stably.

In the combustion apparatus according to another aspect of the present invention, since part or all of the vaporizing chamber is in contact with the flame hole plate, the heat of the flame hole plate is transferred to the vaporizing chamber during combustion. Therefore, the temperature of the vaporization chamber rises, and the vaporization of the liquid fuel is promoted. Therefore, the combustion device of the present invention burns stably.

[Brief description of the drawings]

FIG. 1 is a sectional view of a water heater incorporating a combustion device of the present invention.

FIG. 2 is a front view of the combustion device according to the embodiment of the present invention and a perspective view of an opening of a box.

FIG. 3 is a cross-sectional view of the combustion device according to the embodiment of the present invention.

FIG. 4 is an exploded perspective view of the entire combustion device according to the embodiment of the present invention.

FIG. 5 is an exploded perspective view of the vicinity of a flow path forming member of the combustion device of FIG. 2;

FIG. 6 is a perspective view showing a configuration when a fuel supply pipe is attached to a flow path forming member.

FIG. 7 is a perspective view of an air amount adjusting unit employed in the combustion device of FIG. 2;

FIG. 8 is a perspective view of the vicinity of a combustion section of the combustion device of FIG. 2 as viewed from above.

FIG. 9 is a front view of a fixed side plate-shaped member of an air amount adjusting unit employed in the combustion device of FIG. 2;

FIG. 10 is a side view of the fixed side plate-shaped member of FIG. 9;

11 is a front view of a moving-side plate-shaped member of an air amount adjusting unit employed in the combustion device of FIG. 2;

FIG. 12 is a front view of an air amount adjusting unit employed in the combustion device of FIG. 2, showing an opened state.

13 is a front view of an air amount adjusting unit employed in the combustion device of FIG. 2, showing a state in which an opening is closed.

FIG. 14 is a front view of a flow dividing member employed in the combustion device of FIG. 2;

FIG. 15 is a drawing of an upper surface side (gas flow path side) of a flame hole plate used in the combustion apparatus of FIG. 2;

16 is a drawing of the lower surface side (flame hole side) of the flame hole plate of FIG.

17 shows a flame plate used in the combustion device of FIG. 2;
It is a front view in the state where the flame hole member, the net-like member, and the auxiliary flame member were combined.

FIG. 18 is a front view of a flame hole member.

FIG. 19 is a front view of the mesh member.

FIG. 20 is a front view of the auxiliary flame member.

FIG. 21 is a sectional view taken along line AA of FIG. 20;

FIG. 22 is a front view and a plan view of a rotary cup employed in the combustion device of FIG. 2;

23 is a sectional view taken along line AA of FIG.

FIG. 24 is a sectional view taken along the line BB of FIG. 16;

FIG. 25 is an enlarged sectional view taken along the line CC of FIG. 16;

FIG. 26 is an explanatory diagram illustrating a configuration on a gas flow path side of a flame hole plate employed in the combustion device of FIG. 2;

FIG. 27 is a perspective view of the vicinity of a flame hole of the combustion device of FIG. 2 as viewed from below.

FIG. 28 is an explanatory diagram illustrating a flow of a fuel gas.

FIG. 29 is an explanatory diagram illustrating a flow of secondary air.

FIG. 30 is a perspective view showing a superimposed structure of a flame hole member, a mesh member, and an auxiliary flame member.

FIG. 31 is a schematic perspective view of the combustion device of FIG. 2 as viewed from below.

FIG. 32 is a perspective view of the vicinity of a flame hole of a combustion apparatus according to another embodiment of the present invention as viewed from below.

FIG. 33 is a cross-sectional view showing an example of a vaporizing section employed in a conventional combustion device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Combustion apparatus 2 Blower 3 Drive mechanical part 5 Air amount adjustment part (rectification means) 7 Combustion part 8 Vaporization part 16 Motor 21 Water heater 35 Dividing member 36 Flame hole plate 41 Outer combustion wall (outer wall part) 43, 59, 109 Inner wall 54 Upper opening 55, 56 Flange 60 Vaporization chamber 70 Flow path forming member 62 Mounting bracket 79 Fuel pipe 83 Lower opening 88 Primary air supply cylinder

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yoshiyuki Kanda 93, Edocho, Chuo-ku, Kobe, Hyogo Prefecture Inside Noritz Co., Ltd. (72) Inventor Masaru Hiroyasu 93, Edocho, Chuo-ku, Kobe, Hyogo Co., Ltd. Noritz F-term (reference) 3K052 AA01 AB12 AC05 EA06 EB09

Claims (14)

[Claims] 1. A combustion apparatus for vaporizing and burning a liquid fuel, comprising a flame hole plate for distributing flame holes in a plane, wherein the flame hole plate is disposed within a flame hole distribution region from an opening surface of the flame hole. A combustion device, further comprising a projecting member projecting toward the flame generating section. 2. A combustion apparatus having a vaporizing section for vaporizing a liquid fuel, wherein the vaporizing section vaporizes the liquid fuel, discharges the fuel from a flame hole, and burns the fuel cell. The flame hole plate is provided with a protruding member that protrudes from the opening surface of the flame hole to the flame generating portion side in the flame hole distribution region, and at least a part of the vaporizing portion is in contact with the flame hole plate. A combustion device characterized by the above-mentioned. 3. The combustion device according to claim 1, wherein the projecting member is provided near the vaporizing section. 4. The combustion device according to claim 1, wherein the protruding member is arranged in a wall shape. 5. The combustion device according to claim 1, wherein the projecting member has irregularities. 6. The flame hole plate according to claim 1, wherein the flame hole plate has an outer wall surrounding the flame hole distribution area, and the projecting member is provided at a portion surrounded by the outer wall. The combustion device according to claim 1. 7. A vaporizer for vaporizing a liquid fuel, the vaporizer includes a vaporization chamber and an air supply cylinder, the air supply cylinder is inserted into the vaporization chamber, and air is supplied to the vaporization chamber via the air supply cylinder. A combustion device for introducing and vaporizing fuel in a vaporization chamber, mixing the air with air, and supplying and burning a mixed gas of the fuel and air to a combustion unit, has a flame hole plate for distributing flame holes in a plane. A part of the vaporization chamber is in the flame hole distribution region of the flame hole plate, and the open end of the air supply cylinder is located in the vaporization chamber and protrudes from the opening surface of the flame hole toward the flame generating portion. And combustion equipment. 8. A vaporizing section for vaporizing liquid fuel, the vaporizing section comprising a vaporizing chamber having an opening and an air supply cylinder, wherein the air supply cylinder is inserted into the vaporization chamber from the opening, and an air supply cylinder is provided. Air is introduced into the vaporization chamber through the liquefied gas, the fuel is vaporized in the vaporization chamber and mixed with the air, and the mixed gas of the fuel and the air is mixed gas formed between the inner wall of the opening and the air supply cylinder. In a combustion device for discharging from a discharge gap and supplying it to a combustion section for combustion, an average cross-sectional area of the air supply cylinder is larger than a cross-sectional area of the mixed gas discharge gap. 9. The combustion apparatus according to claim 8, further comprising a burner plate for distributing the burner holes in a plane, wherein a part of the vaporization chamber is located in a burner hole distribution region of the burner plate. . 10. A vaporizing section for vaporizing a liquid fuel, the vaporizing section comprising a vaporizing chamber having an opening and an air supply cylinder, wherein the air supply cylinder is inserted into the vaporization chamber from the opening, and an air supply cylinder is provided. Air is introduced into the vaporization chamber through the liquefied gas, the fuel is vaporized in the vaporization chamber and mixed with the air, and the mixed gas of the fuel and the air is mixed gas formed between the inner wall of the opening and the air supply cylinder. In a combustion device that discharges from a discharge gap and supplies and burns to a combustion portion, the combustion device has a flame hole plate that distributes the flame holes in a plane, and a part of the vaporization chamber is in a flame hole distribution region of the flame hole plate. The opening end of the air supply cylinder is located in the vaporization chamber and protrudes from the opening of the flame hole toward the flame generating portion, and the average cross-sectional area of the air supply cylinder is larger than the cross-sectional area of the mixed gas discharge gap. And combustion equipment. 11. The combustion apparatus according to claim 7, wherein an opening end of the vaporization chamber of the air supply cylinder is inclined from the inside to the outside toward the opening of the vaporization chamber. . 12. The combustion device according to claim 7, wherein an air supply cylinder is integrally formed with the flame hole plate. 13. The vaporization chamber according to claim 7, wherein a part or the whole of the vaporization chamber is in contact with the flame hole plate, or the vaporization chamber is formed integrally with the flame hole plate. A combustion device as described. 14. A vaporizing section for vaporizing a liquid fuel, the vaporizing section having a vaporizing chamber, vaporizing the fuel in the vaporizing chamber and mixing with air, and supplying a mixed gas of the fuel and air to a combustion section. What is claimed is: 1. A combustion apparatus for supplying and burning, comprising: a combustion hole plate for distributing the combustion holes in a plane, wherein a part or all of the vaporizing chamber is in contact with the combustion hole plate.