JP2002327906A - Combustion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combustion device to prevent reliquefaction of fuel gas, to secure stable combustion, and to reduce the consumption power of a vaporizer. SOLUTION: A mixing part 6, a combustion part 7, and a vaporizing part are constituted around a burner port baser 36 as centered, and two divided flow members (planar members) 35 and 39, a heat insulation packing 115, a vaporization chamber 60, a burner port member 51, a reticular member 77, a flame stabilizing member 78, and an auxiliary hot heater 109 are situated thereat. The first divided flow member 35, a heat insulation packing 115, and the second divided flow member 39 are mounted on the upper surface side of the burner port base 36. A stainless steel being low in thermal conductivity is employed at the first and second divided flow members 35 and 39, and since a heat insulation packing 115 is located between the first divided flow member 35 and the burner port base 36, the heat of the burner port base 36 does not escape to an external part and a consumption power of an electric heater 64 to heat the vaporization chamber 60 is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion device using a liquid fuel. The combustion device of the present invention is:
It is 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 for combustion is often used. here,
As a measure for vaporizing the liquid fuel, for example, there is a method of dropping the liquid fuel on a heating element having an electric heater. That is, in this type of combustion device, the liquid fuel is heated and vaporized,
Burn. There is also known an apparatus having a configuration in which a cup is rotated by a motor, liquid fuel is dropped into the cup, and the liquid fuel is scattered by centrifugal force.

[0003]

As described above, in this type of water heater, the liquid fuel is vaporized by applying thermal energy to the liquid fuel. However, if there is a low-temperature portion in the path from the vaporizer to the combustion section, the vaporized fuel will return to the original liquid. For this reason, this type of water heater or the like sometimes causes poor combustion. In recent years, in order to increase the calorific value, there are many water heaters configured to forcibly supply secondary air by a blower. easy.

That is, in a water heater or the like provided with a blower, the secondary air path must be adjacent to the fuel gas path due to internal layout restrictions. Therefore, the fuel gas supply path is cooled by the airflow of the blower,
The temperature drops. As a result, the vaporized gas in the fuel gas supply path is cooled and reliquefied.

Further, the conventional combustion device has a problem that the power consumption of the heating element provided in the vaporizer is large.

Further, the present inventors have prototyped a combustion device in which flame holes are distributed in a plane on a flame hole base for the purpose of downsizing the combustion device (Japanese Patent Application No. 2000-20988). In the combustion device prototyped by the present inventors, the flame hole base is made of aluminum. Further, in the combustion device, a plurality of partition walls are provided on the back side of the flame hole base, a planar member is mounted on the back side of the flame hole base, the back surface side of the partition wall is closed, and fuel gas is supplied to the flame holes. It constitutes a part of a fuel gas flow path to be supplied and a part of an air flow path to supply air to an air hole. Here, when selecting the material of the planar member in the prototype, aluminum was adopted because it was considered that the same material as the flame hole base was suitable. By the way, in the prototype, the air from the blower is blown from the air hole through the flame hole base from the back side of the flame hole base. Therefore, the air is completely blown on the planar member mounted on the flame hole base. Here, in the prototype, as described above, the planar member is aluminum, and the heat transfer is good, so that the cooling heat of the blast is transmitted to the flame hole base, and the vaporized gas flowing in the flame hole base is reliquefied. A problem arose.

In many cases, a prototype combustion device is installed so as to generate a flame downward, and a motor of a blower or the like is provided above the combustion portion. However, it became clear that the temperature of the blower side was high.

The present invention has been made in view of the above-mentioned problems of the prior art, and has as its object to develop a combustion apparatus that can prevent reliquefaction of fuel gas and ensure stable combustion. Another object of the present invention is to prevent overheating of a motor or the like and to develop a combustion device that consumes less power of a carburetor.

[0009]

According to a first aspect of the present invention, there is provided a fuel cell system comprising: a vaporizing section for vaporizing a liquid fuel to produce a fuel gas; and a flame hole base. In a combustion device in which the flame holes for injecting fuel gas are flatly distributed on the surface side of the plate and the fuel gas generated in the vaporizing section is injected from the flame holes through the flame hole base, The hole base constitutes a part of a fuel gas flow path for supplying fuel gas to the flame holes, and a planar member having a lower heat transfer coefficient than the flame hole base is mounted on the back side of the flame hole base. It is a combustion device characterized by the following.

Here, the term "mounted" includes not only a case in which the base is in direct contact with the rear surface of the flame hole base but also a case in which the base is provided with some member interposed therebetween. In short, “mounted” is close to “covered”. The same applies to the following claims.

The combustion apparatus of the present invention is small in size because a part of the fuel gas flow path for supplying fuel gas to the flame holes is constituted by the flame hole base. In the combustion device of the present invention, a planar member having a lower heat transfer coefficient than the flame hole base is mounted on the back surface side of the flame hole base. Therefore, the flame hole base is hardly cooled, and the fuel gas does not cool down. Further, according to the present invention, heat radiation from the flame hole base is suppressed, and power required for heating is reduced.

A second aspect of the present invention for achieving the same object.
The invention described in (1) includes a blower, a vaporizing section that vaporizes liquid fuel to gasify the fuel, and a flame hole base, wherein the flame hole base is plate-shaped and has a flame hole that injects a fuel gas to a surface side thereof. In a combustion device that distributes the fuel gas in a planar manner, air holes that inject air into the flame hole base are distributed in a plane, and a partition wall is provided in the flame hole base to supply fuel gas to the flame holes. A part of the flow path and a part of an air flow path for supplying air to the air holes are formed, and the fuel gas generated in the vaporizing section is injected from the flame holes through the flame hole base, and the air blower blows the flame holes. Combustion, characterized in that a flat member having a lower heat transfer coefficient than the flame hole base is mounted on the back surface side of the flame hole base and is injected from the air hole through the flame hole base from the back surface side of the base. Device.

In the combustion apparatus according to the present invention, the flame hole and the air hole are distributed in a plane on the flame hole base, and the partition wall is provided on the flame hole base to supply the fuel gas to the flame hole. A part of the path and a part of an air flow path for supplying air to the air holes are formed. Therefore, the combustion device of the present invention is small. However, on the other hand, since the air blower blows from the back side of the flame hole base and passes through the flame hole base and is injected from the air holes, there is a problem that the entire flame hole base is easily cooled. Therefore, in the present invention, a planar member having a lower heat transfer coefficient than the flame hole base is mounted on the back surface side of the flame hole base to prevent the cooling of the flame hole base. Therefore, in the combustion device of the present invention, the fuel gas does not cool down. Further, according to the present invention, heat radiation from the flame hole base is suppressed, and power required for heating is reduced.

According to a third aspect of the present invention, there is provided a blower, a vaporizing section for vaporizing liquid fuel to form a fuel gas, and a flame hole base. In a combustion device that distributes a gas hole for injecting gas in a plane, air holes for injecting air are distributed in a plane on the flame hole base, and a partition wall is provided on the flame hole base, and the flame hole is formed in the flame hole. It constitutes a part of a fuel gas flow path for supplying fuel gas and a part of an air flow path for supplying air to the air holes, and the fuel gas generated in the vaporizing section is injected from the flame holes through the flame hole base. The blower is characterized in that the air blower blows through the flame hole base from the back side of the flame hole base and is injected from the air holes, and a heat insulating material is attached to the back surface side of the flame hole base.

The combustion apparatus of the present invention is also small in size because the flame holes and air holes are distributed on the flame hole base and a part of the fuel gas flow path and a part of the air flow path are formed by the flame hole base. On the other hand, however, there is a problem that the entire flame hole base is easily cooled. Therefore, in the present invention, a heat insulating material is attached to the back side of the flame hole base to prevent cooling of the flame hole base. Therefore, in the combustion device of the present invention, the fuel gas does not cool down. Further, according to the present invention, heat radiation from the flame hole base is suppressed, and power required for heating is reduced.

According to a fourth aspect of the present invention, there is provided a blower,
In a combustion device comprising a vaporizing portion for vaporizing a liquid fuel to form a fuel gas, and a flame hole base, wherein the flame hole base is plate-shaped and has a planar distribution of flame holes for injecting fuel gas on the surface side thereof. Air holes for injecting air are distributed in a plane on the flame hole base, and a partition wall is provided on the flame hole base, and a part of the fuel gas flow path for supplying fuel gas to the flame holes and the air holes are provided. It constitutes a part of an air flow path for supplying air, and the fuel gas generated in the vaporizing section is injected from the flame hole through the flame hole base, and the blower blows the flame hole base from the back side of the flame hole base. A combustion device characterized by being passed through and being injected from an air hole, a planar member is mounted on the back side of the flame hole base, and another planar member is further mounted with a heat insulating material interposed therebetween. is there.

The combustion apparatus of the present invention is also small in size because the flame holes and air holes are distributed on the flame hole base and a part of the fuel gas flow path and a part of the air flow path are formed by the flame hole base. On the other hand, however, there is a problem that the entire flame hole base is easily cooled. Therefore, in the present invention, the planar member is attached to the back surface side of the flame hole base, and another planar member is further attached with a heat insulating material interposed therebetween to prevent the flame hole base from cooling.
Therefore, in the combustion device of the present invention, the fuel gas does not cool down. Further, according to the present invention, heat radiation from the flame hole base is suppressed, and power required for heating is reduced.

[0018] The combustion painting apparatus according to claim 5 further comprises a blower, a vaporizer for vaporizing the liquid fuel to produce a fuel gas,
In a combustion device that has a flame hole base, and the flame hole base is plate-shaped and has a planar distribution of flame holes for injecting fuel gas on its surface side, an air hole for injecting air is flat on the flame hole base. In addition, a partition wall is provided on the flame hole base, and a sealing wall for closing an opening between the partition walls is provided on a back side of a portion corresponding to the flame hole, and a fuel gas for supplying a fuel gas to the flame hole is provided. A flow path is formed, and the fuel gas generated in the vaporizing section is injected from the flame hole through the flame hole base, and the blower of the blower is injected from the air hole through the flame hole base from the back side of the flame hole base. A combustion device is characterized in that a planar member is mounted on the back side of the flame hole base, and another planar member is further mounted with a heat insulating material interposed therebetween.

In the combustion apparatus according to the present invention, the flame hole and the air hole are distributed in a plane on the flame hole base, the partition wall is provided on the flame hole base, and the back side of a portion corresponding to the flame hole is provided. , A closing wall for closing the opening between the partition walls is provided, and a fuel gas flow path for supplying a fuel gas to the flame hole is formed. Therefore, the combustion device of the present invention is small. In the combustion device of the present invention, since the fuel gas flow path is completed in the flame hole base by the sealing wall, the combustion gas does not leak to the adjacent air flow path side. Further, in the present invention, a planar member is mounted on the back surface side of the flame hole base, and another planar member is further mounted with a heat insulating material interposed therebetween to prevent cooling of the flame hole base. Therefore, in the combustion device of the present invention,
Fuel gas does not cool. Further, according to the present invention, heat radiation from the flame hole base is suppressed, and power required for heating is reduced.

According to a sixth aspect of the present invention, there is provided a blower,
In a combustion device comprising a vaporizing portion for vaporizing a liquid fuel to form a fuel gas, and a flame hole base, wherein the flame hole base is plate-shaped and has a planar distribution of flame holes for injecting fuel gas on the surface side thereof. Air holes for injecting air are distributed in a plane on the flame hole base, and a partition wall is provided on the flame hole base, and a part of the fuel gas flow path for supplying fuel gas to the flame holes and the air holes are provided. It constitutes a part of an air flow path for supplying air, and the fuel gas generated in the vaporizing section is injected from the flame hole through the flame hole base, and the blower blows the flame hole base from the back side of the flame hole base. The combustion device is characterized in that a member having a lower heat transfer coefficient than the flame hole base is mounted between the fuel gas flow path and the air flow path and is injected from the air hole.

The combustion apparatus of the present invention is also small in size because the flame holes and air holes are distributed on the flame hole base and a part of the fuel gas flow path and a part of the air flow path are formed by the flame hole base. On the other hand, however, there is a problem that the entire flame hole base is easily cooled. Therefore, in the present invention, a member having a lower heat transfer coefficient than the flame hole base is mounted between the fuel gas flow path and the air flow path, thereby preventing the heat of the fuel gas flow path from escaping to the adjacent air flow path. Therefore, in the combustion device of the present invention, the fuel gas does not cool down. Also in the present invention, the heat radiation from the flame hole base is suppressed, and the power required for heating is reduced.

[0022]

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. 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.
FIG. 3 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 the combustion portion of the combustion device of FIG. 2 as viewed from above. FIG. 9 is a front view of a fixed-side plate-like member of an air amount adjusting unit employed in the combustion device of FIG. FIG.
FIG. 10 is a side view of the fixed side plate-shaped member of FIG. 9. FIG.
FIG. 3 is a front view of a moving-side plate-like 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 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.
FIG. 3 is a front view of a first branch member employed in the combustion device of FIG. 2. FIG. 15 is a front view of the heat insulating packing employed in the combustion device of FIG. FIG. 16 is a front view of a second flow dividing member employed in the combustion device of FIG. FIG. 17 is a drawing of the upper surface side (gas flow path side) of the flame hole base employed in the combustion device of FIG. FIG. 18 is a drawing of the lower surface side (flame hole side) of the flame hole base of FIG. FIG. 19 is a plan view of the vicinity of the flame hole base of the combustion apparatus according to the embodiment of the present invention, with the vaporization chamber removed, as viewed from below. FIG. 20 is a plan view of the configuration of FIG. 19 as viewed from the first branch member side. FIG. 21 is a front view of the flame hole member. FIG. 22 is a front view of the mesh member. FIG. 23 is a front view of the flame holding member. FIG.
It is AA sectional drawing of FIG. FIG. 25 is a front view and a plan view of a rotary cup employed in the combustion device of FIG. FIG. 26 is a sectional view taken along line AA of FIG. FIG.
FIG. 19 is a sectional view taken along line BB of FIG. 18. FIG. 28 is a CC enlarged cross-sectional view of FIG. FIG. 29 is an explanatory diagram illustrating a configuration on the gas flow path side of the flame hole base employed in the combustion device of FIG. 2. FIG. 30 is a perspective view of the vicinity of the flame hole of the combustion device of FIG. 2 as viewed from below. FIG. 31 is an explanatory diagram illustrating the flow of the fuel gas. FIG. 32 is an explanatory diagram illustrating the flow of the secondary air. FIG. 33 is a perspective view in which the superimposed structure of the flame hole member, the mesh member, and the flame holding member is drawn upside down. FIG. 34 is a plan view showing the position of the ignition wire. FIG. 35 is a side view showing the position of the ignition wire and a sectional perspective view of the periphery thereof. FIG. 36 is a schematic perspective view of the combustion device of FIG. 2 as viewed from below. FIG. 37 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. FIG. 38 is a front view illustrating the shape of the ignition wire.
39 shows an auxiliary heater employed in the combustion device of FIG. 2, (a) is a front view thereof, (b) is a sectional view taken along line AA, and (c) is a front view of a built-in heater. Is shown. FIG. 40 is a front view of a flow path forming member employed in the combustion device of FIG. 2 and a cross-sectional view taken along the line AA. FIG. 41 is an enlarged cross-sectional view corresponding to the CC cross section of FIG. 18 in another embodiment of the present invention.

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.

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 mounted at 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.
8 is connected to a rotary cup 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 is constituted by 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 side plate-like member 23.
Is provided. The engaging portion 33 has a vertical partition wall 34 which is bent in a vertical direction from a portion provided with an opening as shown in FIG.
Is provided with a notch 44.

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 member 23 is provided at the center of the plate 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 partition walls 28. The vertical partition wall 28
It is further outside the aforementioned outer area and is parallel to each other. The two vertical partition walls 28 function as bearings.

As shown in FIGS. 3, 8 and 9, the air amount adjusting unit 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. A shaft 45 is inserted through the vertical partition wall 28 of the fixed plate member 22 as shown in FIG. 7, and a driving member 46 is rotatably fixed to the shaft. In this case, the driving member 46
It is manufactured by bending at several places, as shown in FIG.
Vertical partition walls a, b, c, d and three horizontal walls e,
f and g are connected alternately. The vertical partition walls b and c at the intermediate portion and the “U” -shaped portion surrounded by the horizontal wall f therebetween straddle the outside of the vertical partition wall 28 of the fixed side plate-shaped member 22, and Fixed. 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 engagement groove 49 is provided in the vertical partition wall a at the other end of the driving member 46. Then, as shown in FIGS.
Are externally attached, and the shaft of the motor 121 is engaged with the engagement groove 49 of the drive member 46 (the engagement state is 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 disk shape as shown in FIGS. I have. On the other hand, on the upper side, an opening 54 is provided only in the central portion. 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 and 83 at the upper and lower portions as described above, 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 in diameter to a central opening 37 of a first flow dividing member (plane member) 35 described later. Further, as described above, the flow path forming member 70 has a disk 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. Also more preferably,
The diameter of the upper opening 54 is more than twice that of the lower opening.

As shown in FIG. 5 and FIG.
Concave portions 107 and 116 are provided at two places as in 42. The concave portions 107 and 116 are provided to form a space for drawing out the electric heater 64 for heating the vaporization chamber 60 and the lead wires of the sensor. Further, two lead wire engaging portions 174 and 175 are provided on the outer peripheral side surface of the flow path forming member 70. Each of the lead wire engaging portions 174 and 175 is a “U” -shaped groove provided by a press or the like. In the present embodiment, the lead wire engaging portions 174 and 175 are provided in the radial direction and the tangential direction with respect to the entire circular shape.

The flow path forming member 7 employed in the present embodiment
At 0, the concave portions 107 and 116 are provided at symmetrical positions. That is, the sizes of the concave portions 107 and 116 are not the same, but the positions are provided at diagonal positions with respect to the center of the flow path forming member 70. The reason why the positions of the concave portions 107 and 116 are provided at diagonal positions is to make the flame distribution uniform. That is, in the process of the trial production, when the concave portion is provided only at one position of the flow path forming member, the distribution of the air and the secondary air supplied to the vaporization chamber 60 changes, and the flame distribution of the combustion section 7 varies. Was. Then, when the concave portion was divided into two portions and the position was symmetrical about the center, the flame distribution became uniform. Therefore, when providing a concave portion for drawing out a lead wire or the like, it is recommended to provide a plurality of concave portions as much as possible, and to arrange the plurality of concave portions substantially equally.

Returning to the description of this embodiment, flanges 55 and 56 are provided at the upper and lower openings of the flow path forming member 70 employed in this embodiment, respectively. Flow path forming member 7
A fuel pipe (fuel supply pipe) 79 is fixed inside 0. 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 portion of the fuel pipe 79 of the flow path forming member 70, a part of the flange 55 is formed in a circular shape along the outer periphery of the fuel pipe 79 as shown in FIG. Also fuel pipe 7
9 is piped along the inner wall of the flow path forming member 70 by the mounting bracket 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 formed around a flame hole base 36, and two flow dividing members (plane members) 35 and 39, a heat insulating packing 115, a vaporizing chamber 60, a flame The hole member 51, the net member 77, the flame holding member 78, and the auxiliary heater 109 are provided. These components are housed in the housing 122.

That is, the first flow dividing member 35 is made of stainless steel, and is a rectangular plate-like member as shown in FIG. 14, and has a large opening 37 at the center. The opening 37 is provided for the auxiliary heater 1 described later.
09 has the same shape as the planar shape. Further, a number of small openings 40, 89, 90 are provided in the peripheral portion. Also, a number of long holes 110 are formed in ten rows. That is, in the present embodiment, a large number of long holes 110 are provided in a row in a region inside the first flow dividing member 35. On the other hand, in the area outside the first flow dividing member 35, two rows and annular openings 89, 90 are provided. The area of the first flow dividing member 35 is larger than the areas of the flame hole base 36, the heat insulating packing 115, and the second flow dividing member 39 described later.

The heat insulating packing 115 is a ceramic made of alumina, silica, or the like, and is made of a member having a lower heat transfer coefficient than the flame hole base 36.

As the heat insulating packing 115, for example, in the case of a ceramic heat insulating packing, one having a thickness of about 2 mm to 3 mm is used. However, it goes without saying that the appropriate thickness differs depending on the model and structure.

The heat insulating packing 115 is formed by punching a plate-shaped ceramic material and providing the same opening as the area inside the first flow dividing member 35 described above. That is, the heat insulating packing 115 is a rectangular plate-shaped member, and has a large opening 111 at the center. The opening 111 has the same shape as the planar shape of the auxiliary heater 109. In the periphery of the opening 111, a number of long holes 112 are formed in ten rows. Long hole 11 of heat insulating packing 115
The position and shape of 2 are the same as those of the long hole 110 of the first flow dividing member 35.

The second flow dividing member 39 is made of stainless steel similarly to the first flow dividing member 35, and is a rectangular plate-like member as shown in FIG. However, the second flow dividing member 39 is smaller than the first flow dividing member 35, and when the two are overlapped, as shown in FIG.
Area outside 5 (area provided with openings 89 and 90)
Protrudes from the second branch member 39. The other opening of the first flow dividing member 35 is a hole or the like when the first flow dividing member 35 is screwed.

The second flow dividing member 39 is also provided with many openings 111, 112, 113, 114 and the like as shown in FIG. Most of these openings 111, 112, 113, 114 are located at positions corresponding to the openings provided in the area inside the first flow dividing member 35 described above. More specifically, the second flow dividing member 39 has a large opening 111 at the center. The position of the opening 111 of the second flow dividing member 39 is the same as the position of the central opening 37 of the first flow dividing member 35 described above. However, the opening 111 provided in the second flow dividing member 39 is a round hole, and the shape is the opening 3 of the first flow dividing member 35.
7 is different in shape.

In the second flow dividing member 39, the central opening 111
Are provided with two long hole-shaped openings 112 and 113. The slots 112 and 113 are provided with the electric heater 64.
And an opening for drawing out a lead wire of a sensor (not shown).

The second branch member 39 has a small opening 1
14 are provided in a row in the longitudinal direction.
As shown in FIG. 16, four or three openings 114 form one block. Opening 114 of second flow dividing member 39
Corresponds to the long hole 110 of the first flow dividing member 35.
The other opening of the second flow dividing member 39 is a hole or the like when the second flow dividing member 39 is screwed.

The auxiliary heater 109 has a ring-shaped main body 117 as shown in FIG. The main body 117 is provided with two extending portions 119 for attachment, and the extending portion 119 is provided with holes 125 for attaching screws.
Further, as a characteristic configuration of the present embodiment, a channel heating extending portion 120 is provided. Channel heating extension 12
Numeral 0 is integral with the main body 117 and is plate-shaped. Further, the flow path heating extension 120 has two long holes 123.

The flame hole base 36 is made of aluminum die-casting, and has a rectangular shape as shown in FIGS. Have been. The flame hole base 36 is provided with a complicated framework, openings and grooves. The upper surface side of the flame hole base 36 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 base 36 has the outer combustion wall 41 surrounding the outer periphery. The inside of the outer combustion wall 41 is a part where a flame is actually generated, and functions as the combustion part 7. The outer combustion wall 41 separates the combustion part 7,
It also has a function of recovering heat and maintaining the flame hole base 36 at a high temperature. 8, 26, 27, and 3 are provided on the outer combustion wall 41.
Holes 53 are provided as shown in FIGS.

Further, the inside of the outer combustion wall 41 is shown in FIGS.
As in 18, 26 and 27, there are provided grooves 48 which are partitioned by a number of vertical partition walls 50. The vertical partition 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, in the outer combustion wall 41, a closed groove 48a constituted by a set of vertical partition walls 50 closed in a loop and another open groove 48 are formed.
with b. The island-shaped portion 75 is partially cut in the longitudinal direction as shown in FIGS. 8 and 29, 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, 26 and 27, the ceiling wall (sealed) except for the central portion and the cut portion of the island-shaped portion 75 is provided on the upper surface side (flow path forming surface side) of the flame hole base 36. A wall 57 is provided. However, regarding the upper part of the groove 48a of the island-shaped portion 75 constituted by the vertical partition wall 50,
An opening 58 is provided in a ceiling wall (blocking wall) 57. There is no opening above the groove 48b at a portion where the vertical partition walls 50 do not constitute an island. Each of the grooves 48 communicates with the lower surface side of the flame hole base 36 (the flame hole mounting surface side).
Therefore, the groove 48a surrounded by the island is provided with an opening 58 in the upper ceiling wall (blocking wall) 57 as shown in FIG. 32 and also opened on the lower surface side (flame hole mounting surface side). The flame hole base 36 penetrates in the vertical direction (thickness direction). On the other hand, the upper side of the groove 48b which does not constitute an island is closed by a ceiling wall (blocking wall) 57 as shown in FIG. 31, 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 partition 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 corresponding portion. ing.

An opening 82 is provided at the center of the flame hole base 36. Eight ribs 66 are provided inside the opening 82, and a primary air supply cylinder 88 is supported at the center.

In this embodiment, the primary air supply cylinder 8
Reference numeral 8 denotes a cylindrical body having a constant inner diameter, and a chamfered portion 108 (FIG. 28) is formed outside the distal end portion. Chamfer 108
Is inclined from the inside to the outside of the primary air supply tube 88 and toward the other end.

In this embodiment, a flange 118 is provided at the upstream end of the primary air supply tube 88 as shown in FIGS. Here, the thickness of the flange 118 is not uniform, but is made partially thick. Specifically, when the flange 118 is viewed from the front as shown in FIG.
(There is no section because the flange 118 has not been reached). When a to h are defined as a to h, the thickness of the h, a area, and the d and e areas facing the long side of the flame hole base 36 is larger than the other areas. Thick. The reason why the flange thickness of the area facing the long side of the flame hole base 36 is increased in this way is to make the momentum of the flame uniform. That is, when viewed from the vaporizing section 8, the flame hole located on the long side of the flame hole base 36 has a short distance from the vaporizing section 8, so that the flow resistance of the fuel gas flow path is small and a large amount of fuel gas is present. Tends to be sprayed. Therefore, in this embodiment, h, a facing the long side of the flame hole base 36 is used.
Area and the flange thickness of the d and e areas
The flow path is narrowed to restrict the supply of the fuel gas.

The upstream end of the primary air supply cylinder 88 is connected to the ceiling wall 57 provided in the groove 48b which does not constitute the island.
In the position. In other words, one end of the primary air supply cylinder 88 is located at the same position as the entire end of the flame hole base 36. On the other hand, the open 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 base 36.

On the lower surface side of the flame hole base 36 (the flame hole mounting surface side) and near the opening 82, the flame hole base 36
An inner wall 43 extending in the longitudinal direction is provided. Inner wall 4
The height of 3 is equal to the height of the outer combustion wall 41 described above.
The inner wall 43 has a flat plate shape as shown in FIGS.

Further, on the lower surface side of the flame hole base 36 (the flame hole mounting surface side) and near the opening 47 of the vaporizing chamber 60,
An inner wall 59 extending in the short direction of the flame hole base 36 is provided. The inner wall 59 extending in the lateral direction is shown in FIGS.
It has a block shape as in 6 and has irregularities. That is, the inner wall 5
Reference numeral 9 denotes a wall shape in which substantially square projecting members are arranged in a line. These inner walls 43 and 59 receive heat from the combustion part 7 to keep the flame hole base 36 warm and prevent re-liquefaction of fuel.

Two elliptical openings 170 and 171 are provided in the vicinity of the opening 82 at the center. Opening 17
0,171 is on the diagonal of the rectangular flame hole base 36. The partition walls 172 and 173 are provided in an annular shape on the upper surface side (the channel forming surface side) of the openings 170 and 171. The openings 170 and 171 are holes provided for drawing out an electric heater 64 provided in the vaporization chamber 60 and a lead wire of the sensor to the air amount adjusting unit 5. These lead wires are drawn out to the air amount adjusting portion 5 and further engaged with the lead wire engaging portions 174 and 175 of the flow path forming member 70 to be drawn out of the flame hole base 36.

Next, the flame hole member 51 will be described. The flame hole member 51 has a substantially rectangular plate shape as shown in FIG. 21 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. 21 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-described 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 portion where the sealant is applied is a portion that comes into contact with the end face of the vertical partition wall 50 of the flame hole base 36.
Further, a mounting hole 151 is provided at a position corresponding to the mounting hole 150 of the flame hole member 51.

The flame-holding member 78 has a rectangular shape as shown in FIG. The flame holding member 78
Is provided with round holes 67 arranged in a row with the long holes 65. The long hole 65 of the flame holding member 78 is formed by 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. The periphery of the elongated hole 65 of the flame holding member 78 is bent at about 45 ° as shown in FIG. The bent portion 73
Has an effect of holding the base end of the flame. However, the bent portion 73 has a partially missing portion 127 as shown in FIGS.

As shown in FIGS. 4, 8 and 33 (FIG. 33 is drawn upside down), the flame hole member 51 is provided on the lower surface of the flame hole base 36 together with the mesh member 77 and the flame holding member 78. It is attached to the lower surface of the flame hole base 36 by screws that are not used. That is, as shown in FIG. 33, the mesh member 77 is in contact with the flame hole base 36, the flame hole member 51 is further superimposed thereon, and finally the flame holding member 78 is provided. Note that in FIG. 33, since the drawing is shown upside down for the sake of drawing, the flame holding member 78, the flame hole member 51, the mesh member 77, and the flame hole base 36 are stacked in this order from the top, but in actuality, As shown in FIGS. 4 and 8, the flame hole base 36, the mesh member 77, and the flame hole member 5 are arranged from above.
1. The flame holding members 78 are stacked in this order.

The air hole array b of the flame hole member 51 is located immediately below the groove 48a formed by the island-like portion 75 formed by the vertical partition wall 50 of the flame hole base 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 holding member 78 exists outside (lower side of) the air hole row b of the flame hole member 51, and the flame holding member 78
Eight round holes 67 are located. Therefore, the island-shaped part 75
The mesh member 77 communicates with the outside through the long hole 73, the air hole array b of the flame hole member 51, and the round hole 67 of the flame holding 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 partition walls 50 in a combination that does not form an island shape. Flame hole member 51
A mesh member 77 is interposed between the flame hole row a and the groove 48b sandwiched between the vertical partition walls 50 in a combination that does not form an island shape. Further, a flame holding member 78 exists outside (lower side of) the flame hole row a of the flame hole member 51, and the long hole 65 of the flame holding member 78 is located at this portion. Therefore, the portions of the combination that do not form the island shape communicate with the outside through the mesh of the mesh member 77, the flame hole row a of the flame hole member 51, and the long hole 65 of the flame holding member 78. Here, since the sealant is applied to the portion of the mesh member 77 that comes into contact with the end face of the vertical partition wall 50 of the flame hole base 36, the vertical partition wall 50
There is no lateral flow of gas at the site.

The upper surface side of the flame hole base 36 (the flow path forming surface side)
First, as shown in FIG.
5 and the second flow dividing member 39 are mounted. That is, the upper surface side (the flow path configuration surface side) of the flame hole base 36 is
5, the heat insulating packing 115, the second flow dividing member 39, and the flame hole base 36 are stacked in this order. ing.

The area of the first flow dividing member 35 is larger than the flame hole base 36, the heat insulating packing 115 and the second flow dividing member 39, as described above.
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 base 36, the first flow dividing member 35 is in contact with the ceiling wall 57. The upstream end of the primary air supply cylinder 88 integrally formed with the flame hole base 36 is at the height of the ceiling wall 57, so that the first branch member 35 contacts the end of the primary air supply cylinder 88. The large opening 37 at the center of the first flow dividing member 35 communicates with a primary air supply cylinder 88 provided at the center of the flame hole base 36. 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 base 36, the first branch member 35 can be easily attached. .

As shown in FIG. 20, an auxiliary heater 109 is mounted in a recess formed by the opening 37 of the first flow dividing member 35 and the opening 111 of the heat insulating packing 115. Therefore, substantially the entire area of one surface of the auxiliary heater 109 is in contact with the second branch member 39. Furthermore, the second flow dividing member 39
The periphery of the opening 111 is in contact with the flange 118 of the primary air supply cylinder 88 on the flame hole base 36 side. Therefore, the main body 117 of the auxiliary heater 109 is in contact with the flange 118 provided at the end of the primary air supply cylinder 88 via the second flow dividing member 39. Therefore, the end of the primary air supply cylinder 88 is heated by the main body 117 of the auxiliary heater 109. In addition, the flow passage heating extension 120 of the auxiliary heater 109 is also in contact with the second flow dividing member 39. Therefore, the channel heating extension portion 120 of the auxiliary heater 109 is provided.
Thereby, a part of the second flow dividing member 39 and a space around the part are heated.

On the upper surface side (flow path forming side) of the flame hole base 36, as described above, two sets of vertical partition walls 50 constitute a loop as shown in FIGS. 75
Further, since the second flow dividing member 39 is in contact with the protruding end portion of the vertical partition wall 50, 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, portions other than the island-shaped portion 75 function as a fuel gas flow path for sending the fuel gas to the flame hole member 51 while promoting the mixing of the vaporized fuel gas and air. The part also functions as the mixing unit 6. The groove 48a surrounded by the island-shaped portion 75 functions as a secondary air flow path.

The central opening 124 of the auxiliary heater 109
The large opening 111 at the center of the first flow dividing member 39 communicates with the primary air supply cylinder 88 provided at the center of the flame hole base 36 as described above. Of the other openings 40, 89, 90 of the second flow dividing member 39, the openings 40 provided in a row are provided between the vertical partition walls 50 of the combination forming the island shape of the flame hole base 36. Located at the site. That is, the small opening 40 of the first flow dividing member 35 opens in the groove 48a surrounded by the island-shaped portion 75 as the secondary air flow path. Here, as described above, the long hole 11 of the first flow dividing member 35 is used.
Since the long hole 112 of the heat insulating packing 115 is located at a position corresponding to the small opening 114 of the second flow dividing member 39, the groove 48a surrounded by the island-shaped portion 75 communicates with the outside.

On the other hand, between the vertical partition walls of the combination which do not form the island shape provided on the flame hole member 51,
There is no opening of the first branch member 35. That is, the first mixing unit 6
There is no opening of the flow dividing member 35.

The area of the first flow dividing member 35 is larger than that of the flame hole base 36 as described above.
The flow dividing member 35 protrudes from the flame hole base 36. In this state, the openings 89 and 90 provided in the area outside the first flow dividing member 35 are both exposed outside the flame hole base 36.

The flame hole base 36 and the first 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. A flange 102 is provided at the lower end of the heat shield wall 85. The flange portion 102 is provided in a “T” shape with respect to the heat shield wall 85 as shown in FIGS. A gap serving as the air flow path 101 is formed between the outer wall portion 100 of the housing 122 and the heat shield wall 85. As described above, the flange 102
Are provided in a “T” shape with respect to the heat shield wall 85 as shown in FIGS.
3 and the air passage 101 side.

The flame hole base 36 and the first flow dividing member 35 are disposed in the housing 122 described above.
The outer combustion wall 41 surrounding the outer periphery of 6 is even smaller than the heat shield wall 85 inside the housing 122, and there is a gap between the outer combustion wall 41 of the flame hole base 36 and the heat shield wall 85 as the air flow path 103. It is formed. Of the holes 89, 90 of the first branch member 35 protruding from the flame hole base 36, the outer holes 90 communicate with the air passage 101 formed between the housing 122 and the heat shield wall 85. The inner hole 89 communicates with an air flow path 103 formed between the outer combustion wall 41 and the heat shield wall 85 of the flame hole base 36.

Next, the vaporizing section 8 will be described. Vaporization section 8
Is constituted by a vaporization chamber 60, a rotary cup 63 and the primary air supply cylinder 88 described above. The vaporizing chamber 60 has a bottom portion 91 and a peripheral portion 9 as shown in FIGS.
2, the bottom 91 is closed, and the top is open. That is, the vaporization chamber 60 has a concave shape, the bottom part 91 and the peripheral part 92 are closed and air-tight and water-tight, 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 30, the central opening 82 of the flame hole base 36. Attached to the part.

Here, in the combustion apparatus of this embodiment, the vaporizing chamber 60 is attached to the flame hole base 36 via the heat insulating packing 130. The material of the heat insulating packing 130 is ceramic made of alumina, silica or the like, and is made of a member having a lower heat transfer coefficient than the flame hole base 36.

The position of the vaporizing chamber 60 is a portion surrounded by the inner wall 43 of the flame hole base 36 and at the center of the flame hole base 36, and is surrounded by the flame holes (small holes 72) and Located in close proximity. 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 vaporization chamber 60 is heated from the outside by the flame generated from the flame holes (small holes 72) during combustion. The opening end face 125 of the vaporizing chamber 60 is provided with a heat insulating packing 130.
8 comes into contact with the plane portion of the flame hole base 36 as shown in FIG.

An electric heater 64 is provided 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, a blade portion 99 is provided 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 tube 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 at the center of the flame hole base 36, and the primary air supply cylinder 88 is integrally provided via the eight ribs 66. And the vaporization chamber 60
The primary air supply cylinder 88 is in the shape of a cup and is attached to the central opening 82 of the flame hole base 36, so that the primary air supply cylinder 88 is
0 is inserted into the vaporization chamber 60 through the opening 105.
At this time, the primary air supply cylinder 88 is located concentrically with the vaporization chamber 60. Therefore, the primary air supply cylinder 88 and the vaporization chamber 60
A fuel gas discharge space 106 is formed between the fuel gas discharge space 106 and the inner wall of the fuel cell.

The position of the leading end (lower side) of the primary air supply tube 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. 28) is formed on the outside at the tip end 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 tube 88, and the fuel pipe 79 reaches the inside of the rotary cup 63 as shown in FIGS.

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.

The air amount adjusting section 5 is screwed to the upper part 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 a conical flow path is formed in the first branch member 35 which is a boundary between the mixing section 6 and the air amount adjusting section 5. A 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 opening 3 at the center of the first flow dividing member 35
7 is connected to a smaller opening 83 of the air amount adjusting section 5 via a packing 81. It is desirable that these packings 80 and 81 have excellent heat insulating properties and do not penetrate liquid fuel such as kerosene. Specifically, silicon is used as the material of the packing.

The center axis of the flow path forming member 70 coincides with that of the moving side plate-like 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 attached to the first flow dividing member 35 via a packing 81 and directly communicates with the primary air supply cylinder 88 described above. Directly into the vaporizing chamber 60 of the vaporizing section 8. 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.

In the combustion device 1 of the present embodiment, the ignition wire 131 is provided at a special position. In the combustion device 1 of the present embodiment, the ignition wire 131 itself is configured to fly an electric spark from the tip of the conductor by a known piezoelectric effect or the like, but its mounting position is unique. That is, the ignition wire 131 is inserted into a hole (not shown) provided in the outer combustion wall 41 and enters the combustion section. And the tip of the ignition wire 131 (electrode part)
133 is the outer combustion wall 41 as shown in FIGS.
From the second row of flame holes. More specifically, as shown in FIG. 34, the ignition wire 131 is provided above the center of a straight line connecting the closest parts of the two specific flame holes 140 and 141. Further, the portion is a position near the vaporization chamber 60 as shown in FIG. 19 and corresponds to a position immediately below the channel heating extending portion 120 of the auxiliary heater 109.

In the combustion device 1 of this embodiment, the ignition wire 13
1 has a conductive part 132 and an electrode part 133,
However, as described above, the electrode portion 133 straddles the first row of flame holes from the outer combustion wall 41 and is close to the second row of flame holes. Therefore, a flame hole 134 (FIG.
5) is blocked. The reason why the flame hole 134 (FIG. 35) immediately above the conductive portion 132 is closed is to prevent the conductive portion 132 from being heated by the flame.

Further, as described above, in the combustion device 1 of the present embodiment, the missing portion 127 is partially provided in the flame holding member 78, but the electrode portion 133 of the ignition wire 131 is connected to the missing portion 1.
27 is provided at a portion corresponding to 27. In addition, there is no air hole 71 in the same row as the missing portion 127 of the flame holding member 78. In short, in the present embodiment, the conductive portion 132 of the ignition wire 131 passes through a portion where the air hole 71 and the flame holding member 78 do not exist. In the combustion device 1 according to the present embodiment, since the missing portion 127 of the flame holding member 78 is provided at a portion to be ignited, the flame easily moves to the adjacent flame hole row. Further, in this embodiment, since there is no air hole 71 in the portion, the fire easily moves to the adjacent flame hole row. The ignition wire 131 has a conductive part 132 and an electrode part 133, and the tip 135 of the electrode part 133 is
As shown in FIG. 38 (a), it is a plane and is parallel to the flame hole member 51. That is, in the normal combustion device 1, the ignition wire 131
In general, the electrode portion 133 is provided to be inclined with respect to the flame hole member 51 as shown in FIG. 38B. However, in this embodiment, the tip 135 of the electrode portion 133 is
Are located parallel to The reason why the present embodiment sets the tip 135 of the electrode portion 133 in the horizontal state in this way is to increase the chance of contact with the fuel gas by dispersing the ignition spark, and to ignite quickly. .

Further, in this embodiment, there is a feature in the mounting structure of the ignition wire 131. That is, in the combustion device 1 of the present embodiment, the flame hole base 36 and the first flow dividing member 35
22, two openings 175 are provided on the front side of the housing 122. The cross-sectional shape of the opening is as shown in FIG. 35A, and the cross-sectional perspective shape is as shown in FIG.

In the present embodiment, as shown in FIG.
2 has a structure in which a heat shield wall (inner wall) 85 is provided inside the outer wall portion 100, but an opening 176 on the outer wall portion 100 side is recessed inward (inner wall 85 side) and provided on the heat shield wall 85. The opening 177. In the present embodiment, the heat shield wall 8
5 is also recessed inward, and the heat shield wall 8
The inner surface of the concave portion of the opening 177 of the fifth and the outer surface of the open concave portion of the outer wall portion 100 are fitted. Therefore, the opening 175 of the housing 122 has high rigidity. In the present embodiment, the opening 175
Are the opening 176 on the outer wall portion 100 side and the opening 1 on the heat shielding wall 85.
77, and both openings 176, 17
As shown in FIG. 35 (b), there is a gap between 7. Therefore, the opening 175 has a considerable thickness as a whole, and the base of the ignition wire 131 is firmly held.

In this embodiment, the flame detector 180 is provided adjacent to the ignition wire 131. The flame detector 180 has the same mounting structure as the ignition wire 131.

The combustion apparatus 1 of the present embodiment is used with the flame hole facing downward. The combustion device 1 of the present embodiment is used for a water heater 21 as shown in FIG. And the combustion apparatus 1 is installed in the upper part of the can 4 in which the heat exchanger 19 was 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. Also, the electric heater 64 built in the peripheral portion 92 of the vaporization chamber 60 is energized to generate heat, and the entire inner wall of the vaporization chamber 60 is heated. Further, the auxiliary heater 109 is energized to heat the primary air supply cylinder 88 and a part of the second branch member 39. 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 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, in the air amount adjusting section 5, the movable side plate member 23 is rotatably superimposed on the fixed side plate member 22 as described above.
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.

[0097] The air that has passed through the air amount adjusting section 5 is separated in two directions and flows downstream. That is, the air that has passed through the central area is directly captured by the disk-shaped flow path forming member 70, and is blown into the vaporization chamber 60 from the primary air supply cylinder 88 that communicates 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.
Since 4 is larger than the opening 83 on the vaporizing section 8 side, a large amount of air is taken into the flow path forming member 70 and sent to the vaporizing section 8 side. Further, in the present embodiment, since the auxiliary heater 109 is provided at the lower end of the primary air supply tube 88, the temperature of the air sent to the vaporizing section 8 is increased.

Further, another part of the air blowing is provided by the first branch member 35.
From many of the small-diameter openings 40 provided in a row, the air flows into the groove 48 a between the vertical partition walls 50 of the combination forming the island-shaped loop of the flame hole base 36. That is, the opening 40 and the groove 48a provided in the first flow dividing member 35
, The secondary air is supplied to the combustion unit 7. More specifically, the row-shaped openings 40 of the first flow dividing member 35 and the mesh members 7
Secondary air is supplied to the combustion unit 7 through the long holes 73, the air hole array b of the flame hole member 51, and the round holes 67 of the flame holding member 78.

Further, the air blown through the openings 89 and 90 provided in the area outside the first flow dividing member 35 flows through the outer peripheral portion of the flame hole base 36. Specifically, the inner opening 89
Is passed through the air flow path 103 formed between the outer combustion wall 41 of the flame hole base 36 and the heat shield wall 85, and collides with the flange 102 provided at the lower end of the heat shield wall 85, and It turns inside the hole base 36 and flows toward the combustion section 7 side. Part of the air flowing through the air passage 103 also flows into the inside of the flame hole base 36 from a hole 53 provided in the outer combustion wall 41. The air flow path 1 formed between the outer combustion wall 41 and the heat shield wall 85 of the above-described flame hole base 36
The air flowing through 03 has a function of cooling the heat shielding wall 85. Further, this air collides with the flange 102 and turns to the inside of the flame hole base 36, and most of the air is consumed as secondary air. Most of the air flowing from the holes 53 provided in the outer combustion wall 41 to the inside of the flame hole base 36 also contributes to combustion as secondary air.

Further, an opening 90 outside the first flow dividing member 35 is provided.
Is passed 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 mainly serves to cool the outer wall portion 100 of the housing 122 and the outer wall of the lower heat exchanger. In the combustion device 1 of the present embodiment, a “T” -shaped flange portion 102 is provided at the lower end of the heat shield wall 85, and the air flowing through the air flow path 101 near the lower end of the heat shield wall 85 is applied to the outer wall 85. The air flow is increased by the outer wall 100 side. The reason is that the heat shield wall 8
5 is a position deviated downward from the outer combustion wall 41 of the flame hole base 36, and the outer wall portion 100 tends to become high in temperature.
This is for efficiently cooling the high-temperature portion of No. 00. Therefore, functionally, the heat shield wall 85 has a lower overall height than the outer wall portion 100, and the heat shield wall 85 has a downstream end portion of the outer wall portion 1 at the downstream end of the outer wall portion 100.
It is in the position surrounded by 00. Although the air flowing through the air flow path 101 functions as secondary air or tertiary air, the flow rate of the air flowing through the air flow path 101 can be changed by changing the width of the flange portion 102 described above. .

Then, a large amount of primary air is introduced into the vaporizing section 8 by the blowing of the blower 2 as described above, and
A ventilation atmosphere is used.

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. Also, 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 (hereinafter simply referred to as fuel gas) thus generated with the fuel gas air flows 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. Go downstream.

That is, the fuel gas once flows upward along the cylindrical peripheral wall 92 of the vaporization chamber 60, and further flows along the primary air supply cylinder 88. Here, in the combustion device 1 of the present embodiment, the auxiliary heater 109 is provided, and the primary air supply cylinder 88 is heated and kept warm. Therefore, the fuel gas does not lose heat even when it comes into contact with the primary air supply cylinder 88.

The air thus supplied from the flow path forming member 70 to the inside of the vaporization chamber 60 via the primary air supply tube 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 fuel gas that has left the vaporization chamber 60 flows into the passage on the upper side of the flame hole base 36 once.

Subsequently, the fuel gas is supplied to the vertical partition walls 5 in a combination not forming an island-like loop as shown in FIGS.
It flows into the groove 48b between the zeros. Here, in the combustion device of the present embodiment, the groove 48b between the vertical partition walls 50,
That is, a ceiling wall (blocking wall) 57 is integrally provided on the back surface side of the portion corresponding to the flame hole, and the groove 48b between the vertical partition walls 50 is isolated from the adjacent groove 48a.
Therefore, the fuel gas does not flow into the air flow path.
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. The flame hole base 3 of the mesh member 77
Since the sealant is applied to the portion of the vertical partition wall 50 which is in contact with the end face of the vertical partition wall 50, gas does not flow in the vertical partition wall 50 portion in the horizontal direction, and the entire amount of fuel gas does not escape laterally, and the entire amount of the flame hole is small. It is released from the holes 72).

On the other hand, the air that has flowed downstream from the other part 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 large number of openings 40 provided in the first branch member 35 to the groove 48a between the vertical partition walls 50 of the combination constituting the loop of the flame hole base 36, and the flame hole (small hole) is formed. 72).

As described above, the air passage 103 formed between the outer combustion wall 41 of the flame hole base 36 and the heat shield wall 85 from the opening 89 provided in the area outside the first branch member 35. The flowing air and the air flowing through the air flow path 101 formed between the outer wall portion 100 of the housing 122 and the heat shield wall 85 from the opening 90 of the first branch member 35 also function as secondary air. In particular, the air flowing through the air flow passage 103 formed between the outer combustion wall 41 and the heat shield wall 85 through the opening 89 of the first flow dividing member 35 has a hole partially provided in the outer combustion wall 41. 53 also flows into the flame hole base 36, and the remaining portion collides with a folded portion (flange 102) provided at the lower end of the heat shield wall 85, and the combustion portion 7.
Because it flows to the side, a high proportion is consumed as secondary air.

When the fuel gas is ignited by the spark of the ignition wire 131, a downward flame is generated from the flame holes (small holes 72).

Here, as a function and effect unique to the present embodiment, it is possible to perform early ignition and to reduce misfire. The combustion device of the present embodiment has low heater power consumption during combustion. Hereinafter, the function and effect will be described. That is, in the combustion device 1 of the present embodiment, the primary air supply cylinder 88 is heated by the auxiliary heater 109. Therefore, as described above, the air supplied to the vaporization chamber 60 and mixed with the fuel gas is heated in advance. Therefore, in the present embodiment, the fuel is vaporized quickly in the early stage of use.

In the combustion apparatus 1 of the present embodiment, the electric heater 64 is built in the vaporization chamber 60, and the temperature inside the vaporization chamber 60 is raised to vaporize the fuel. Although the vaporization chamber 60 is attached to the flame hole base 36, in the combustion device 1 of the present embodiment, the space between the vaporization chamber 60 and the flame hole base 36 is insulated. More specifically, in the present embodiment, the heat insulating packing 1 is provided between the vaporization chamber 60 and the flame hole base 36.
30 are interposed. Therefore, in the early stage of use, the heat of the vaporization chamber 60 does not escape to the flame hole base 36 side.

That is, generally, the electric heater is provided only in the vaporizing chamber 60 for vaporizing the fuel. Here, in the early stage of use, since there is no flame in the combustion section 7, the heat source is generally only the electric heater 64 of the vaporization chamber 60. Therefore, in the early stage of use, the flame hole base 36 is in the vaporization chamber 60.
The temperature is lower than. Generally, the flame hole base 36 is heavier than the vaporization chamber 60 and has a larger heat capacity. Therefore, when the vaporizing chamber 60 is brought into direct contact with the flame hole base, the vaporizing chamber 6
The heat of 0 escapes to the flame hole base 36 side, and the temperature rise of the vaporization chamber 60 is delayed. Therefore, in the present embodiment, the heat insulating packing 130 is interposed between the vaporizing chamber 60 and the flame hole base 36, and the vaporizing chamber 6
The heat of 0 was prevented from escaping to the flame hole base 36. Therefore, in the present embodiment, the temperature of the vaporization chamber 60 rises quickly, and the fuel can be vaporized at an early stage.

In this embodiment, the vaporized fuel gas flows outside the primary air supply cylinder 88. Here, in the present embodiment, since the temperature of the primary air supply cylinder 88 is raised by the auxiliary heater 109, even if the fuel gas touches the primary air supply cylinder 88, heat is not taken away by the primary air supply cylinder 88 side. Absent.

Further, in this embodiment, air is sent from the blower 2 provided above the flame hole base 36, and the air is supplied to the first branch member 3 provided on the back side of the flame hole base 36.
Hit 5 Here, the temperature of the air blown from the blower 2 is the outside air temperature, which is low.
Since the heat insulating packing 115 is interposed between 5 and the flame hole base 36, the flame hole base 36 is not cooled. The first flow dividing member 35 and the second flow dividing member 39 are both made of stainless steel.
Since a material having a lower thermal conductivity than 6 is used, the flame hole base 36 is also kept warm by the first branch member 35 and the second branch member 39. And in this embodiment,
Since the flame hole base 36 constitutes a part of the fuel gas supply passage, the prevention of the cooling of the flame hole base 36 is directly linked to the heat retention of the fuel gas supply passage. Therefore, in this embodiment, the fuel gas is less likely to lose heat to the fuel gas supply path.

Further, in the present embodiment, only the flow path from the vaporizing section 8 to the ignition wire 131 is mainly kept warm. That is, in the present embodiment, the auxiliary heater 109 is provided at the end of the primary air supply cylinder 88.
9 has a special shape. That is, the auxiliary heater 109 employed in the present embodiment is provided with the channel heating extending portion 120. The electrode portion 133 of the ignition wire 131 is located at the position of the flow path heating extending portion 120. That is, in this embodiment,
The fuel gas flow path from the vaporization chamber 60 to the flame hole near the ignition means is mainly heated by the flow path extending portion 120 of the auxiliary heater 109. More specifically, a part of the second flow dividing member 39 is heated by the flow path extending portion 120 of the auxiliary heater 109, and the fuel gas flow path in the vicinity is heated. Here, in the present embodiment, the auxiliary heater 109 is provided at an end of the primary air supply cylinder 88,
Channel heating extension 12 which is a part of auxiliary heater 109
0 continuously extends to the vicinity of the ignition wire 131. Therefore, in this embodiment, a series of fuel gas flow paths from the vaporization chamber 60 to the ignition wire 131 are continuously heated. Therefore, the fuel gas injected from the flame hole near the ignition wire 131 is specially heated and kept warm, has high thermal energy, and is easily ignited by the spark of the ignition wire 131.

The combustion apparatus 1 of this embodiment can perform early ignition as described above, but once ignited, the flame is immediately stabilized and the power consumption is low. That is, 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 is started, the vaporization chamber 60 is started.
Is heated by the flame. That is, most of the vaporization chamber 60 is in the flame hole distribution region of the flame hole base 36, and
It protrudes from the opening surface 42 of the flame hole to the flame generating portion side (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. Flame base 3
6 are provided with inner walls 43 and 59, which receive heat from the combustion part 7 to keep the flame hole base 36 warm and prevent re-liquefaction of fuel. That is, the inner wall 43, 59 is also used for the flame hole base 3.
6 and protrudes from the opening 42 of the flame hole toward the flame generating portion side (the 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. Particularly in the present embodiment, the inner wall 4
Reference numerals 3 and 59 are provided in the vicinity of the vaporization chamber 60, and the inner walls 43 and 59 are located immediately below the flow path immediately after the fuel gas exits the vaporization chamber 60. Therefore, the fuel gas flow path is heated positively, and re-liquefaction of the fuel is prevented.

In addition, in this embodiment, the first flow dividing member 35
And the second flow dividing member 39 is made of stainless steel having a low thermal conductivity, and the heat insulating packing 115 is interposed between the first flow dividing member 35 and the flame hole base 36. Does not escape to the outside. As described above, in the combustion device of this embodiment, the flame hole base 3
Since the heat of No. 6 does not escape to the outside and the re-liquefaction of the fuel is prevented, the power consumption of the electric heater 64 for heating the vaporization chamber 60 can be reduced. Further, since the flow path forming member 70 is attached to the first branch member 35 which is a part of the mixing section via the packing 80 having excellent heat insulating properties, the heat of the mixing section and the fuel gas flow path is reduced by the flow path forming member. Do not escape to 70. Therefore, reliquefaction of the fuel is less likely to occur. Even if the fuel is re-liquefied, the packing 80 is selected so as not to be impregnated with liquid fuel such as kerosene.

Further, in the combustion device of the embodiment, the plate-shaped heat insulating packing 115 and the first and second flow dividing members 35 and 39 having low thermal conductivity exist between the combustion section 7 and the motor 16 and the like. However, it is difficult for the residual heat after the end of the combustion to convect toward the motor 16. Therefore, the combustion device 1 of the present embodiment is
There are few failures of electric equipment such as the motor 16.

In the above-described embodiment, stainless steel is used for both the first and second flow dividing members 35 and 39. In some cases, a material having good conductivity is employed. That is, since the auxiliary heater 109 is in contact with the second flow dividing member 39 and the flame hole base 36 side is heated via the second flow dividing member 39, the second flow branching is performed so that the heat from the auxiliary heater 109 is smoothly transmitted. The member 39 having good thermal conductivity may be used.

In the above embodiment, the flame hole base 3
6 was covered with a heat insulating packing or a stainless steel plate having a low thermal conductivity to prevent the heat of the flame hole base 36 from escaping to the outside. Heat should also be prevented from escaping into the adjacent secondary air flow path. As a measure, as shown in FIG. 41, a ceramic plate 159 made of a material such as stainless steel plate or silica is provided on the inner wall of the island-shaped portion 75 as a secondary air flow passage, and the fuel gas flow passage and the secondary air flow passage are provided. Insulation may be considered. Further, a member having a low heat transfer coefficient (a member having a low heat transfer coefficient) 159 such as a stainless steel plate may be provided on the fuel gas flow path side.

[0121]

As described above, the combustion apparatus of the present invention has an effect that re-liquefaction of fuel gas is prevented and stable combustion can be ensured. Further, the combustion device of the present invention does not overheat the motor and the like at the end of combustion. Further, the combustion device of the present invention consumes less power of the electric heater of the vaporizer and is economical.

In particular, in the combustion device according to the first and second aspects,
Since a planar member having a lower heat transfer coefficient than the flame hole base is mounted on the back side of the flame hole base, the flame hole base is hardly cooled, heat radiation from the flame hole base is suppressed, and electric power required for heating is reduced. Has the effect of being reduced.

In the combustion apparatus according to the third, fourth, and fifth aspects of the present invention, the heat insulating material is attached to the back side of the flame hole base. This has the effect of reducing the power required for heating.

In the combustion device according to the fourth and fifth aspects, a planar member is also used.

Further, the combustion device according to the fifth aspect has the effect of reducing leakage of fuel gas.

In the combustion apparatus according to the sixth aspect, a member having a lower heat transfer coefficient than the flame hole base is mounted between the fuel gas passage and the air passage so that the heat of the fuel gas passage is adjacent to the air. Since the fuel gas is prevented from escaping into the flow path, the fuel gas is less likely to cool, and the power required for heating is reduced.

[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.

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 first branch member employed in the combustion device of FIG. 2;

FIG. 15 is a front view of a heat insulating packing employed in the combustion device of FIG. 2;

FIG. 16 is a front view of a second flow dividing member employed in the combustion device of FIG. 2;

FIG. 17 is a drawing of the upper surface side (gas flow path side) of the flame hole base used in the combustion device of FIG. 2;

18 is a drawing of the lower surface side (flame hole side) of the flame hole base of FIG. 17;

FIG. 19 is a plan view of the vicinity of the flame hole base of the combustion apparatus according to the embodiment of the present invention, with the vaporization chamber removed, as viewed from below.

FIG. 20 is a plan view of the configuration of FIG. 19 as viewed from the first flow dividing member side.

FIG. 21 is a front view of a flame hole member.

FIG. 22 is a front view of the mesh member.

FIG. 23 is a front view of the flame holding member.

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

FIG. 25 is a front view and a plan view of a rotary cup employed in the combustion device of FIG. 2;

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

FIG. 27 is a sectional view taken along line BB of FIG. 18;

FIG. 28 is an enlarged sectional view taken along the line CC of FIG. 18;

FIG. 29 is an explanatory diagram illustrating a configuration on a gas flow path side of a flame hole base used in the combustion device of FIG. 2;

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

FIG. 31 is an explanatory diagram illustrating a flow of a fuel gas.

FIG. 32 is an explanatory diagram illustrating a flow of secondary air.

FIG. 33 is a perspective view in which the superposed structure of the flame hole member, the mesh member, and the flame holding member is drawn upside down.

FIG. 34 is a plan view showing a position of an ignition wire.

FIG. 35 is a side view showing the position of the ignition wire and a sectional perspective view of the periphery thereof.

FIG. 36 is a schematic perspective view of the combustion device of FIG. 2 as viewed from below.

FIG. 37 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. 38 is a front view illustrating the shape of an ignition wire.

39 shows an auxiliary heater employed in the combustion device of FIG. 2, (a) is a front view thereof, (b) is a sectional view taken along line AA, and (c) is a front view of a built-in heater. Is shown.

FIG. 40 is a front view of a flow path forming member employed in the combustion apparatus of FIG. 2 and a cross-sectional view taken along AA thereof.

FIG. 41 is a cross-sectional view of another embodiment of the present invention.
It is an expanded sectional view corresponding to C section.

[Explanation of symbols]

 1,154 Combustion device 2 Blower 8 Vaporizer 35 First diverting member (planar member) 39 Second diverting member (planar member) 36 Flame hole base 60 Vaporizing chamber 70 Flow path forming member 88 Primary air supply cylinder 109 Auxiliary heating Heater 115 Insulation packing 131 Ignition wire (ignition means) 156 Plate for heat transfer 160 Member with low heat transfer coefficient

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Hirosaku Shirode 93 Edocho, Chuo-ku, Kobe, Hyogo Prefecture Inside Noritz Co., Ltd. (72) Inventor Norihiro Hori 93 Edocho, Chuo-ku, Kobe, Hyogo Stock Association Inside Noritz Corporation (72) Inventor Asahi Maekawa 93 Edocho, Chuo-ku, Kobe City, Hyogo Prefecture Co., Ltd. Inside the Company Noritsu (72) Inventor Hitoshi Hara 93 Edocho, Chuo-ku, Kobe City, Hyogo Prefecture F-term in Noritz Co., Ltd. (Reference) 3K052 AA09 AB12 AC03 AC05 DA03 DB03

Claims (6)

[Claims] 1. A fuel cell system comprising: a vaporizing portion for vaporizing a liquid fuel to produce a fuel gas; and a flame hole base, wherein the flame hole base is plate-shaped and has a planar distribution of flame holes for injecting a fuel gas to a surface side thereof. In the combustion device in which the fuel gas generated in the vaporizing section is injected from the flame hole through the flame hole base, a part of a fuel gas flow path that supplies the fuel gas to the flame hole by the flame hole base is configured, A combustion device characterized in that a planar member having a lower heat transfer coefficient than the flame hole base is mounted on the back side of the flame hole base. 2. A blower, a vaporizing section for vaporizing liquid fuel to produce a fuel gas, and a flame hole base, wherein the flame hole base is plate-shaped and has a flat flame hole for injecting fuel gas on its surface side. In a combustion device that distributes gas in a uniform manner, air holes for injecting air are distributed in a plane at a flame hole base, and a partition wall is provided at the flame hole base to supply a fuel gas to the flame holes. A part of a passage and a part of an air flow path for supplying air to the air hole are formed, and the fuel gas generated in the vaporizing section is injected from the flame hole through the flame hole base, and the blower blower blows the air through the flame hole base. A combustion device characterized in that a planar member having a lower heat transfer coefficient than the flame hole base is mounted on the back surface side of the flame hole base, the fuel being injected from the air hole through the flame hole base from the back surface side of the combustion device. . 3. A ventilator, a vaporizer for vaporizing liquid fuel to produce a fuel gas, and a flame hole base, wherein the flame hole base is plate-shaped and has a flat flame hole for injecting fuel gas on its surface side. In a combustion device that distributes fuel gas, air holes for injecting air are distributed in a plane on a flame hole base, and a partition wall is provided on the flame hole base to supply fuel gas to the flame holes. A part of a passage and a part of an air flow path for supplying air to the air hole are formed, and the fuel gas generated in the vaporizing section is injected from the flame hole through the flame hole base, and the blower blower blows the air through the flame hole base. A combustion apparatus characterized in that a heat insulating material is attached to the back side of the flame hole base, which is injected from the air hole through the flame hole base from the back side of the flame hole base. 4. A ventilator, a vaporizer for vaporizing liquid fuel to form a fuel gas, and a flame hole base, wherein the flame hole base is plate-shaped and has a flat flame hole for injecting fuel gas on its surface side. In a combustion device that distributes fuel gas, air holes for injecting air are distributed in a plane on a flame hole base, and a partition wall is provided on the flame hole base to supply fuel gas to the flame holes. A part of a passage and a part of an air flow path for supplying air to the air holes are formed, and the fuel gas generated in the vaporizing section is injected from the flame holes through the flame hole base, and the blower of the blower blows the air through the flame hole base. It is ejected from the air hole through the flame hole base from the back side of the, and a planar member is attached to the back side of the flame hole base,
A combustion apparatus characterized in that another planar member is mounted with a heat insulating material interposed therebetween. 5. A blower, a vaporizer for vaporizing a liquid fuel to produce a fuel gas, and a flame hole base, wherein the flame hole base is plate-shaped and has a flat flame hole for injecting a fuel gas on its surface side. In a combustion device that distributes air in a uniform manner, air holes for injecting air are distributed in a plane on a flame hole base, and a partition wall is further provided on the flame hole base. A fuel gas flow path for supplying fuel gas to the flame hole is formed, and a fuel gas generated in the vaporizing section is injected from the flame hole through the flame hole base, and a blower is provided. The blast of air passes through the flame hole base from the back side of the flame hole base and is jetted from the air hole, a planar member is attached to the back side of the flame hole base, and another planar surface is sandwiched with heat insulating material. Combustion device having a member mounted . 6. A blower, a vaporizing section for vaporizing liquid fuel to produce a fuel gas, and a flame hole base, wherein the flame hole base is plate-shaped, and a flame hole for injecting a fuel gas to a surface side thereof is formed in a plane. In a combustion device that distributes gas in a uniform manner, air holes for injecting air are distributed in a plane at a flame hole base, and a partition wall is provided at the flame hole base to supply a fuel gas to the flame holes. A part of a passage and a part of an air flow path for supplying air to the air hole are formed, and the fuel gas generated in the vaporizing section is injected from the flame hole through the flame hole base, and the blower blower blows the air through the flame hole base. A combustion member characterized in that a member having a lower heat transfer rate than the flame hole base is mounted between the fuel gas flow path and the air flow path and is injected between the fuel gas flow path and the air flow path through the flame hole base from the back side of the combustion chamber. apparatus.