JP4178407B2 - Combustion device - Google Patents

Description

  The present invention relates to a combustion apparatus, and more particularly to a combustion apparatus that vaporizes and burns liquid fuel.

  Even now that city gas and propane gas have become popular, heating devices such as fan heaters often use combustion devices that use inexpensive liquid fuel such as kerosene to reduce running costs. Among them, many combustion apparatuses used for applications with a relatively small calorific value generate fuel gas obtained by vaporizing liquid fuel by a vaporization unit, and send the generated fuel gas to the combustion unit for combustion.

Patent Document 1 discloses a combustion apparatus that uses such a liquid fuel.
FIG. 17 is a cross-sectional view and a plan view of the vaporization unit 200 employed in the combustion apparatus disclosed in Patent Document 1. In the combustion apparatus disclosed in Patent Document 1, a vaporization unit 200 is provided below the combustion unit 208, and the vaporization unit 200 is formed by including a rotating member 210 inside the vaporization chamber 201.

  The vaporizing chamber 201 has a bottomed cylindrical shape formed by a bottom portion 202 and a peripheral wall 203. The bottom 202 has a built-in electric heater 207, and by heating the current to the electric heater 207, heat is transmitted from the bottom 202 to the peripheral wall 203 so that the entire inner wall of the vaporization chamber 201 can be heated. Yes.

  The rotating member 210 included in the vaporizing chamber 201 is attached to a rotating shaft 204 that is rotationally driven by a motor (not shown), and integrally rotates at a high speed, and the liquid fuel is vaporized by the centrifugal force accompanying the rotation. It has the function to stir the vaporized fuel gas while scattering toward the peripheral wall 203 of the gas.

  In the vaporization section 200 having this configuration, as shown in FIG. 17, the liquid fuel dropped from the tip of the fuel pipe 205 becomes fine particles due to the centrifugal force accompanying the rotation of the rotating member 210 toward the inner wall of the vaporization chamber 201. The finely divided liquid fuel that has been scattered collides with the inner wall of the vaporization chamber 201 that has been heated, and is vaporized to generate fuel gas. Then, the generated fuel gas is mixed and agitated by the rotating member 210 while supplying the primary air via the primary air introduction cylinder 206, thereby generating fuel gas (mixed gas) having a uniform concentration to the combustion unit 208. Supply. In other words, this type of vaporization unit 200 imparts thermal energy to the liquid fuel that has been dispersed finely to promote vaporization.

  By the way, as shown in FIG. 18, the rotating member 210 has a bottomed cylindrical shape having a stirring blade 212 formed by cutting and raising the periphery of the disc body 211. 212 is provided with an auxiliary stirring blade 213 formed by bending a part thereof inward.

As shown in FIG. 17, the liquid fuel dropped from the fuel pipe 205 to the rotating member 210 rotates following the rotation of the disk body 211 (the rotating member 210) and receives centrifugal force. Due to this centrifugal force, as shown in FIG. 17B, the liquid fuel is scattered toward the peripheral wall 203 of the vaporization chamber 201 through the slit 214 formed between the adjacent stirring blade 212 and the auxiliary stirring blade 213. Vaporized into fuel gas. Then, the stirring and mixing of the fuel gas and the primary air is performed by the stirring blade 212 and the auxiliary stirring blade 213 of the rotating member 210.
JP 2002-333128 A

  However, in the vaporization unit 200 shown in FIG. 17, the rotating shaft 204 is located at the center of the rotating member 210 (disk body 211), so that the portion where the liquid fuel is dripped is naturally deviated from the center of the disk body 211. It was forced to be the transferred site. That is, the fuel pipe 205 has a structure that must be positioned at a position where the tip of the fuel pipe 205 is shifted from the center of the disk body 211 (shifted to the left in FIG. 17).

  For this reason, as shown in FIG. 17B, the amount of liquid fuel scattered is large on the downstream side in the rotational direction of the rotating member 210 near the tip of the fuel pipe 205, and the liquid fuel is scattered toward the downstream side in the rotational direction. The amount gradually decreased, and it was difficult to uniformly scatter the dropped liquid fuel onto the peripheral wall 203 of the vaporization chamber 201.

  As a result, the fuel gas (mixed gas) flowing from the vaporization chamber 201 to the combustion unit 208 has a concentration unevenness, which is a factor that hinders stable combustion. In particular, when the rotational speed of the rotating member 210 is low or the amount of liquid fuel dripped is large according to the amount of combustion, the amount of liquid fuel scattered on the peripheral wall 203 of the vaporizing chamber 201 tends to become more uneven and improved. Was desired.

  The present invention is proposed in view of the above-described circumstances, and a combustion apparatus that can ensure stable combustion by generating liquid fuel (mixed gas) having a uniform concentration by uniformly scattering liquid fuel. The purpose is to provide.

A combustion apparatus of a first configuration proposed as a reference example to achieve the above object has a vaporization unit that vaporizes liquid fuel to generate fuel gas, and the generated fuel gas or air is mixed. In the combustion apparatus for supplying the fuel gas to the combustion unit and combusting, the vaporization unit rotates the rotating member inside to disperse the liquid fuel, vaporizes the scattered fuel, and agitates the rotating member. The rotating shaft is integrally formed with the rotating shaft extending to the outer periphery of the disk body and is provided with a stirring blade, and the rotating shaft is fixed at the center of the disk body. Concavities and convexities are formed along at least one of the vicinity of the dropping portion of the disc body to be dropped or the vicinity of the outer peripheral edge of the disc body.

The unevenness | corrugation of above-described structure refers to the shape of any one of a recessed part or a convex part, or the shape with which the recessed part and the convex part were combined.

  When the disk body has a planar shape with no irregularities, the dropped liquid fuel diffuses on the surface of the disk body, and the diffused liquid fuel receives the rotational force from the disk body and is subjected to centrifugal force to cause the diameter of the disk body. Immediately fly out of the direction. In other words, when the disc body is a flat surface having no irregularities, the dropped liquid fuel is scattered from the rotating member without sufficiently moving in the rotating direction of the rotating member. For this reason, the amount of scattering of the liquid fuel increases near the downstream side in the rotation direction of the rotating member close to the liquid fuel dropping position, and the amount of scattering of the liquid fuel decreases from the portion toward the downstream side in the rotation direction. Thus, an imbalance tends to occur in the amount of liquid fuel scattered over the entire circumference of the rotating member.

According to this configuration , by providing irregularities along the vicinity of the dropping portion of the disc body to which the liquid fuel is dropped, a part of the dropped liquid fuel flows into the recess, and the liquid fuel that has flowed in has a rotational force. It is gradually scattered by centrifugal force while receiving and rotating. Further, a part of the dropped liquid fuel diffuses in the vicinity of the convex portion, and the diffused liquid fuel is gradually scattered by the centrifugal force while rotating by receiving the rotational force by the convex portion.

In addition, according to this configuration , by providing irregularities along the vicinity of the outer peripheral edge of the disc body, a part of the liquid fuel that is dripped and diffused outward in the radial direction of the disc body by centrifugal force is formed in the concave portion. The inflowing liquid fuel is gradually scattered by centrifugal force while rotating by receiving the rotational force. In addition, part of the liquid fuel that diffuses outward in the radial direction of the disk body due to centrifugal force stays in the vicinity of the convex portion, and the retained liquid fuel gradually scatters from both ends of the convex portion due to centrifugal force. .

  Therefore, compared to the case where the disc body is not provided with irregularities, the time during which the dropped liquid fuel stays in the rotating member can be increased, and the dropped liquid fuel can be scattered while sufficiently rotating. it can. As a result, the amount of liquid fuel scattered can be made uniform over the entire circumference of the rotating member.

In this configuration , the unevenness can be provided along only one of the vicinity of the dropping part of the disk body to which the liquid fuel is dropped or the vicinity of the outer peripheral edge of the disk body, and also along the vicinity of both parts. It is also possible to provide it.

In addition, in this configuration , for example, when a rotating member is manufactured by bending a die-cut one metal plate, a step pressing that forms irregularities in a portion corresponding to the disk body of the metal plate is performed in advance. It can be formed by pressing. According to this step pressing process, it is possible to manufacture a rotating member having projections and depressions without requiring another member, and it is possible to reduce costs while improving productivity.
Moreover, according to this structure, since an unevenness | corrugation is formed in a disc body by step pressing, an opening is not formed in a disc body. As a result, the dropped liquid fuel is prevented from dripping below the disc body, and can be efficiently scattered outward in the radial direction.

The combustion apparatus of the second configuration proposed as a reference example is the same as that of the combustion apparatus of the first configuration , with the same number of projections and recesses of the rotating member as the stirring blades, and the circumferential direction over the entire circumference of the disc body. It is set as the structure arranged at equal intervals.

According to this configuration , the liquid fuel dropped on the disk body is distributed substantially evenly over the entire circumference of the disk body by the unevenness provided at equal intervals in the circumferential direction of the disk body. In addition, since the same number of irregularities and stirring blades are arranged, arranging the stirring blades at equal intervals in the circumferential direction of the disc body allows the relative positional relationship between the irregularities and the stirring blades to be It can be the same over time.

  As a result, the amount of the liquid fuel that is dripped stays in the unevenness and the stirring blade is substantially uniform over the entire circumference of the disc body, and the amount of liquid fuel scattered is further uniform over the entire circumference of the rotating member. Is possible.

  It is also possible to adopt a configuration in which the unevenness of the rotating member is provided by a multiple of the number of stirring blades. Also in this configuration, the relative positional relationship between the unevennesses and the stirring blades can be made the same, and the amount of liquid fuel that is dripped can be made uniform in the unevennesses and the stirring blades.

According to a third configuration proposed as a reference example, in the combustion device according to the first or second configuration, the unevenness of the rotating member is formed by a plurality of cuts and protrusions protruding toward a side where the liquid fuel is dropped. It is set as the structure formed along an outer periphery.

According to this structure , a convex part (unevenness | corrugation) can be formed along the outer periphery vicinity of a disc body by the simple structure which provides a cut-and-raised along the outer periphery of a disk body. As a result, a portion of the liquid fuel that is dripped and diffuses outward in the radial direction of the disc body due to centrifugal force stays in the cut and raised (convex portion), while gradually being lifted and removed from both sides of the site by the centrifugal force. Scatter towards the direction. Therefore, the time during which the liquid fuel stays in the rotating member can be increased, and the amount of scattered liquid fuel can be made uniform over the entire circumference of the rotating member.

Here, the invention described in claim 1 is proposed to achieve the above object, the vaporizing unit and the mixed fuel gas of a fuel gas or air generated to the liquid fuel is vaporized to produce a fuel gas In the combustion apparatus having a combustion section for supplying and burning , the bottom of the vaporizing section is closed and the upper section is opened, and a rotating member is rotated inside the combustion section to supply liquid fuel. The scattered fuel is vaporized and stirred, and the rotating member is formed by providing stirring blades on the outer periphery of a disk body that rotates integrally with a rotating shaft extending in the vertical direction. A rotating shaft is fixed at the center of the body, and the rotating member is a side where the liquid fuel is dropped along the vicinity of the dropping portion or the vicinity of the outer peripheral edge on the surface of the disc body where the liquid fuel is dropped during rotation. The disc body is provided with a plurality of openings with inner edges protruding And it is configured with formed Te.

  According to this invention, a convex part is formed of the protrusion part of the opening provided in a disc body. Therefore, by dropping the liquid fuel radially inward from the plurality of openings of the disc body, the dropped liquid fuel is prevented from dripping downward through the openings, and the dropped liquid fuel is The dispersed liquid fuel is dispersed by the projecting part (convex part) of the opening, and is gradually scattered by centrifugal force while rotating by receiving the rotational force from the projecting part (convex part) of the opening. As a result, the amount of liquid fuel scattered can be made uniform over the entire circumference of the rotating member.

The portion where the opening is provided can be provided in the vicinity of the dropping portion of the disc body where the liquid fuel is dropped, in the vicinity of the outer peripheral edge of the disc body, or in both of them.
Further, according to the present invention, since the opening is provided in the disc body, the fuel gas and primary air can flow through the opening of the disc body, and the fuel gas or the fuel gas mixed with air inside the vaporization section ( It is possible to promote the homogenization of the concentration of the mixed gas).

According to a second aspect of the present invention, in the combustion apparatus according to the first aspect, the rotating member has irregularities, and the irregularities are formed by fixing a disk-shaped auxiliary member to the disk body. In addition, at least one of the auxiliary member and the disk body is configured to be provided with at least one of an opening, a cutout, a cut-up, and a step press.

  According to the present invention, the unevenness of the rotating member is formed by fixing an auxiliary member having at least one of an opening, a notch, a cut and raised, or a step push to the side of the disc body where the liquid fuel is dropped. Can be adopted.

According to this structure, an unevenness | corrugation can be formed only by fixing an auxiliary member to a disc body, without providing an unevenness | corrugation in a disc body. Thereby, for example, an auxiliary member can be added to the conventional rotating member to form a rotating member formed with irregularities, and the rotating member can be made uniform in the amount of scattered liquid fuel over the entire circumference. It becomes possible.
Further, according to this configuration, since the disk body is not directly provided with an opening, a cutout, or a cut-up, the dropped liquid fuel is prevented from dripping below the disk body, and is directed outward in the radial direction. Can be scattered efficiently.

According to this configuration, the auxiliary member can take various shapes.
For example, an auxiliary member in which a plurality of openings and notches are arranged in a circle on a circular plate can be employed. By superimposing and fixing this auxiliary member on the disc body, the opening of the auxiliary member and the bottom of the notch are closed by the disc body and function as a recess.
Further, an auxiliary member in which a plurality of cut and raised portions are arranged in a circle can be employed. By superimposing and fixing the auxiliary member on the disc body, each cut and raised portion functions as a convex portion, and the bottom portion of the cut and raised portion is closed by the disc body and functions as a concave portion.

  Further, according to the present invention, the unevenness of the rotating member is formed by fixing the disk-shaped auxiliary member on the bottom surface side of the disk body provided with at least one of an opening, a cutout, and a cut and raised. It is also possible to adopt a configuration.

  According to this configuration, the opening or notch or cut-and-raised part provided in the disc body can be closed by the auxiliary member provided on the bottom surface side, and the opening or notch part functions as a recess and the cut-and-raised part Functions as a convex part. Accordingly, it is possible to form irregularities on the disk body while preventing the dropped liquid fuel from dropping down below the disk body, and to achieve uniform dispersion of the liquid fuel over the entire circumference. A rotating member can be used.

  In this invention, the structure which fixes an auxiliary member integrally to a disc body can be set suitably. For example, the auxiliary member can be integrally fixed to the disk body by attaching the disk body and the auxiliary member to the rotating shaft in a state of being overlapped. Further, the auxiliary member may be fixed to the disk body by welding or the like.

According to a third aspect of the present invention, in the combustion apparatus of the first aspect, the rotating member includes a disk-shaped auxiliary member and the disk body, and has substantially the same outer diameter as the disk body. The disk-shaped auxiliary member is fixed to the bottom surface side of the disk body directly or with a gap, and a plurality of cut-and-raised along the outer peripheral edge of the auxiliary member, or a plurality of disks arranged on the disk body At least one of the openings is provided.

  According to the present invention, the concave and convex portions of the rotating member have a disk-shaped auxiliary member having substantially the same outer diameter as the disk body and provided with a plurality of cuts and raised along the outer peripheral edge. The structure formed by fixing to the bottom face side of a disc body so that it may protrude to the dripped side can be taken.

According to this configuration, it is possible to form the cut-out (convex portion) along the outer peripheral edge of the rotating member simply by fixing the auxiliary member to the bottom surface side of the disc body. Thereby, it can be set as the structure provided with the unevenness | corrugation similar to the invention described in Claim 3, and it becomes possible to equalize the scattering amount of liquid fuel over the perimeter of a rotating member.
In addition, according to this configuration, it is possible to form a convex portion (cut and raise) just by adding an auxiliary member to the conventional rotating member, and the amount of scattering of the liquid fuel is made uniform over the entire circumference. A rotating member can be used.

  Further, according to the present invention, the unevenness of the rotating member is formed by providing an opening in the disk body, and the disk-shaped auxiliary member having substantially the same outer diameter as the disk body is on the bottom surface side of the disk body. It is possible to adopt a configuration that is fixed with a predetermined gap and the opening communicates with the gap.

  According to this configuration, a part of the dropped liquid fuel is scattered while diffusing the surface of the disk body radially outward by centrifugal force, and the remaining liquid fuel is left in the gap through the opening. It sags and scatters while diffusing in the gap (surface of the auxiliary member) radially outward by centrifugal force.

  That is, according to this configuration, the dropped liquid fuel can be separated and diffused between the surface (upper surface side) of the disc body and the gap (upper surface side of the auxiliary member). As a result, the flow amount of the liquid fuel in each path is reduced, and the flowing liquid fuel is given sufficient rotational force from the rotating member, and the amount of scattered liquid fuel is made uniform over the entire circumference of the rotating member. It becomes possible to do.

  In addition, in this configuration, it is also possible to adopt a configuration in which a plurality of cuts are provided along the outer peripheral edge of the disk-shaped auxiliary member. According to this configuration, the liquid fuel that diffuses in the gap (the surface of the auxiliary member) radially outward can be retained in the cut and raised provided on the outer peripheral edge of the auxiliary member, and the liquid fuel in the rotating member This makes it possible to further increase the residence time of the liquid fuel and to make the amount of scattered liquid fuel more uniform over the entire circumference of the rotating member.

According to the first aspect of the present invention, it is possible to provide a combustion apparatus that can uniformize the amount of liquid fuel scattered over the entire circumference of the rotating member and perform stable combustion with uniform fuel gas concentration. .
Moreover , the amount of liquid fuel scattered can be made more uniform over the entire circumference of the rotating member, and a combustion apparatus that performs stable combustion can be provided.
According to invention of Claims 2-3 , it becomes possible to implement easily the rotating member provided with the unevenness | corrugation by simple structure.

  Embodiments of the present invention will be described below with reference to the drawings. In the following description, the upper and lower relationships are based on the state in which the combustion apparatus is incorporated in a water heater or the like.

  FIG. 1 is a cross-sectional view of a combustion apparatus 1 according to an embodiment of the present invention, FIG. 2 is a partially broken perspective view showing an internal configuration around a vaporization section 7, and FIG. 3 shows an embodiment of a rotating member 50 employed in the combustion apparatus 1. FIG. 4 is a cross-sectional view and a plan view of the vaporizing section 7 of the combustion apparatus 1 employing the rotating member 50 of FIG.

  The present invention is characterized in the rotating member 50 employed in the vaporizing section 7 in the combustion apparatus 1 that vaporizes and burns liquid fuel. Therefore, prior to detailed description of the rotating member 50, the overall configuration and schematic operation of the combustion apparatus 1 will be described.

The combustion apparatus 1 of this embodiment is built in a water heater or the like with the flame hole facing downward, and is a downward combustion type (a so-called reverse combustion type in which a flame is jetted downward).
As shown in FIG. 1, the combustion device 1 is configured by stacking a blower 2, a drive machine unit 3, an air amount adjustment unit 4, a mixing unit 5, and a combustion unit 6 in order from the top. A vaporization unit 7 is provided in the vicinity of the mixing unit 5 and the combustion unit 6, and the air amount adjustment unit 4 and the vaporization unit 7 are connected by a flow path forming member 13 to form an air flow path.

  To explain sequentially, the blower 2 is configured such that a fan 21 is rotatably disposed inside a concave housing 20 made by bending a steel plate, and an opening 22 is provided in the central portion of the housing 20. Yes.

The drive machine unit 3 has a box 10, and a motor 30 is attached to the center of the top plate 12. The motor 30 has rotating shafts 30a and 30b protruding from both ends, and the rotating shafts 30a and 30b penetrate substantially the entire length of the combustion apparatus 1 upward and downward. An upper rotating shaft 30 a of the motor 30 is connected to the fan 21, and a lower rotating shaft 30 b is connected to the rotating member 50 of the vaporizing unit 7.
In other words, the fan 21 is rotationally driven by the rotational driving of the motor 30 and air is blown downward (air supply), and at the same time, the rotating member 50 is rotationally driven.

The air amount adjusting unit 4 includes a disk-shaped moving side plate member 41 and a rectangular fixed side plate member 42, and the upper moving side plate member 41 can rotate with respect to the lower fixed side plate member 42. It is attached.
The movable side plate-like member 41 and the fixed side plate-like member 42 are each provided with a shaft insertion hole at the center thereof, and an opening serving as an air hole around the center portion. It can be rotated.

  When the step motor 40 is rotated, the drive piece 43 engaged with the drive shaft 40a swings to drive the engaging portion 41a of the moving side plate member 41 in the circumferential direction. As a result, the moving side plate-like member 41 rotates relatively on the fixed side plate-like member 42 around the central shaft insertion hole. In other words, by driving the step motor 40 to rotate the moving side plate-like member 41, the degree of overlap between the openings of the moving side plate-like member 41 and the fixed side plate-like member 42 changes, and thereby the opening area that communicates vertically The air supply amount (air blowing amount) is adjusted by varying the air pressure.

The amount of air flow generated from the blower 2 is adjusted by controlling the opening area of the air flow path from the blower 2 to the mixing unit 5, the combustion unit 6, and the vaporization unit 7 by the air amount adjustment unit 4. .
In this embodiment, the supply amount of both primary air (air supplied directly to the vaporization unit 7) and secondary air (air supplied to the periphery of the flame hole base described later) is controlled by controlling the air amount adjusting unit 4. The configuration is optimally adjusted. A control signal to the step motor 40 is generated by a control circuit unit (not shown) based on signals from sensors (not shown) and switches (not shown) provided in each part of the combustion apparatus 1.

  The flow path forming member 13 is formed by bending a thin plate into a substantially conical shape, and the inside thereof is a cavity and communicates vertically. That is, the flow path forming member 13 has openings in the upper part and the lower part, and both communicate with each other. The upper opening is in contact with the central part of the fixed-side plate member 42 described above, and the lower opening is It communicates with a primary air introduction cylinder 15 to be described later.

  A fuel pipe 14 is fixed inside the flow path forming member 13. The fuel pipe 14 enters the inside from the upper opening of the flow path forming member 13, is attached so as to pass through the flow path forming member 13 and the primary air introduction cylinder 15 and to reach above the rotating member 50 of the vaporizing unit 7. Yes.

The mixing unit 5, the combustion unit 6, and the vaporization unit 7 are configured around the flame hole base 60, and the vaporization unit 7 is provided at the center of the flame hole base 60. These components are accommodated in the housing 11.
As shown in FIG. 2, the flame hole base 60 is made of aluminum die casting, and is provided with a complicated frame, openings and grooves. The upper surface side of the flame hole base 60 mainly functions as a flow path constituting surface of fuel gas and secondary air, and the lower surface side functions as a flame hole mounting surface.

That is, the flame hole base 60 is provided with grooves 63 partitioned by a large number of loop-shaped vertical walls 62, and grooves 64 are provided between the adjacent vertical walls 62. And the fuel gas produced | generated in the vaporization part 7 is jetted to the flame hole below from the groove | channel 64 via between the upper surface wall 61 and the vertical wall 62, and a flame is generated.
Further, the secondary air supplied from the air amount adjusting unit 4 is ejected to both sides of the flame hole through the groove 63 to perform stable combustion.

As shown in FIG. 2, the vaporizing unit 7 is configured by including a rotating member 50 in a vaporizing chamber 70.
The vaporizing chamber 70 is a bottomed cylindrical body having a bottom 71 and a peripheral wall 72, the bottom 71 is closed, and the top is open. In other words, the vaporizing chamber 70 has a concave shape, the bottom 71 and the peripheral wall 72 are closed, have airtightness and watertightness, and the upper part is open. Thus, the vaporizing chamber 70 has a cup-like shape and is attached to the center portion of the flame hole base 60.

  An electric heater 73 is built in the bottom 71 of the vaporization chamber 70. When the electric heater 73 is energized, the bottom 71 generates heat, and this heat is conducted through the wall of the vaporizing chamber 70 so that the inner wall of the vaporizing chamber 70 is entirely heated. Thereby, as will be described later, it has a function of promoting the vaporization of the liquid fuel scattered in the vaporization chamber 70.

  The rotating member 50 is attached to the rotating shaft 30b and rotates integrally. The rotating member 50 scatters liquid fuel dropped from the fuel pipe 14 by centrifugal force due to rotation, and is vaporized by heat inside the vaporizing chamber 70 to generate fuel. Has the function of generating gas. Moreover, it has the function of stirring the vaporized fuel gas and the primary air supplied from the blower 2 to generate a uniform mixed gas.

  In other words, the rotating member 50 has a function of scattering the liquid fuel dropped from the fuel pipe 14 (using kerosene in the present embodiment) in the form of fine particles in order to efficiently vaporize the liquid fuel inside the vaporizing chamber 70. And the function of stirring the vaporized fuel gas and primary air and mixing them uniformly.

Next, the configuration and operation of the rotating member 50 employed in the combustion device 1 of the present embodiment will be described.
As shown in FIG. 3, the rotating member 50 has a bottomed cylindrical shape in which the peripheral edge of the circular disk body 51 is cut and raised around the entire circumference of the circular disk body 51 to form the stirring blades 52. An auxiliary stirring blade 53 formed by bending a part thereof inward is provided. Nine sets of stirring blades 52 provided with auxiliary stirring blades 53 are provided at equal intervals along the peripheral edge of the disk body 51, and slits 54 are formed between adjacent stirring blades 52 that are opened.

The stirring blade 52 has a rectangular shape, and is bent upward at a substantially right angle with respect to the disc body 51.
The auxiliary stirring blade 53 has a trapezoidal shape in which a lower portion of a rectangular plate having a width and height substantially equal to that of the stirring blade 52 is obliquely cut, and is bent inward at a substantially right angle to the stirring blade 52. Has been.

  A fixing hole 51 a for fixing the rotating member 50 to the rotating shaft is provided in the center of the disc body 51. The fixing hole 51a has a shape in which a part of a circle is omitted. As shown in FIG. 3A, the fixing hole 51a is inserted into a screw portion 30c having substantially the same cross-sectional shape at the tip of the rotating shaft 30b and fastened with a nut N. Thus, the rotating member 50 is engaged with the rotating direction of the rotating shaft 30b.

  In addition, around the fixed hole 51a of the disc body 51, five openings 55 are arranged at equal intervals on a circumference centered on the fixed hole 51a. The opening 55 is an opening in which the inner peripheral edge slightly protrudes upward to form a convex portion 55a, and is formed by burring.

The rotating member 50 of the present embodiment specifically has the following dimensions.
That is, the diameter of the disc body 51 of the rotating member 50 is approximately 45 mm, the opening 55 is 7 mmφ, and the diameter of the circumference in which the openings 55 are arranged is approximately 23 mm. The stirring blade 52 has a width of about 10 mm and a height of about 13 mm. The auxiliary stirring blade 53 has a width of about 10 mm, a height of about 12 mm, and a notch angle with respect to the horizontal of about 50 degrees.

  The rotating member 50 having such a shape is manufactured by bending a metal plate whose outer shape is punched out by press working. That is, by pressing the metal flat plate, a substantially circular metal flat plate in which portions corresponding to the stirring blade 52 and the auxiliary stirring blade 53 are radially formed on the outer periphery of the disc body 51 is punched out. Further, at the time of pressing, the fixing hole 51a is opened and the opening 55 is formed by burring. And the rotating member 50 shown to Fig.3 (a) is manufactured by bending the site | part corresponded to the auxiliary | assistant stirring blade 53 and the stirring blade 52 of the punched metal flat plate.

  The rotating member 50 of the present embodiment has a shape in which the stirring blade 52 is slightly inclined outward with respect to the tangent line S as shown in FIG. Thereby, it is set as the structure which produces a rotating airflow effectively with the stirring blade 52 by rotation, and promotes stirring.

  As shown in FIG. 4A, the rotating member 50 is fixed by inserting a fixing hole 51 a of the rotating member 50 into a screw portion 30 c provided at the lower end portion of the rotating shaft 30 b and fastening with a nut N. Thereby, the rotating member 50 rotates integrally with the rotating shaft 30b.

  When the rotating member 50 is fixed to the rotating shaft 30b, the tip of the fuel pipe 14 is positioned slightly inward from the opening 55 provided in the rotating member 50 as shown in FIG. In other words, the liquid fuel dropped from the fuel pipe 14 does not drop downward through the opening 55 and is dropped onto the surface of the disk body 51 radially inward from the convex portion 55a of the opening 55. Has been.

Next, the operation of the rotating member 50 during combustion will be described with reference to FIGS.
In the present embodiment, as shown in FIG. 4, the rotating shaft 30 b rotates counterclockwise when viewed from above, and thereby the rotating member 50 also rotates counterclockwise inside the vaporizing chamber 70. On the other hand, liquid fuel (kerosene) is dropped onto the rotating member 50 via the fuel pipe 14.

  As shown in FIG. 4B, the liquid fuel dropped onto the rotating member 50 falls on the surface of the disc body 51 without entering the opening 55 and is dispersed between the convex portions 55a of the adjacent openings 55. Then spread. The liquid fuel diffused between the convex portions 55a flows outward in the radial direction by centrifugal force accompanying rotation while receiving rotational force from the convex portions 55a and rotating. Then, a part of the liquid fuel flowing outward in the radial direction is scattered as it is toward the peripheral wall 72 of the vaporization chamber 70 through the slit 54, and the rest of the liquid fuel is further retained along the stirring blade 52. Then, it gradually flows toward the slit 54 and scatters toward the peripheral wall 72.

  In other words, according to the rotating member 50, by arranging the five openings 55 having the convex portions 55 a in the disc body 51, sufficient rotation is achieved by the convex portions 55 a on the liquid fuel dropped and diffused on the disc body 51. It can be scattered gradually while applying force and rotating. Therefore, as compared with the configuration in which the opening 55 is not provided, the time during which the dropped liquid fuel stays in the rotating member 50 can be increased, and the amount of liquid fuel scattered can be made uniform over the entire circumference of the vaporization chamber 70. Can be realized.

  In particular, depending on the combustion amount of the combustion device 1, even when the rotational speed of the rotating member 50 is low or when the liquid fuel is dripped in a large amount, the dropped liquid fuel is gradually scattered by the rotating member 50. And the liquid fuel can be uniformly scattered over the entire circumference of the peripheral wall 72 of the vaporizing chamber 70. Thereby, the concentration of the fuel gas in the vaporization chamber 70 can be made uniform regardless of the combustion amount, and the fuel gas with a stable concentration can be supplied to the combustion unit 6.

  Further, since the liquid fuel is uniformly scattered over the entire circumference of the peripheral wall 72 of the vaporization chamber 70, the liquid fuel is not locally concentrated and scattered on the peripheral wall 72. Thereby, stable vaporization can be maintained even when the energization power of the electric heater 73 is reduced, and the running cost of the combustion apparatus 1 can be reduced.

  Further, according to the rotating member 50, by arranging the openings 55 in the disc body 51, the generated fuel gas and primary air can freely flow in the vertical direction of the disc body 51 inside the vaporizing chamber 70. As a result, the mixing of the fuel gas and the primary air can be promoted inside the vaporizing chamber 70, and the fuel gas having a more uniform concentration can be generated.

  As described above, according to the rotating member 50 of the present embodiment, the vaporization chamber has a simple configuration in which the openings 55 having the convex portions 55a are arranged in the vicinity of the dropping portion of the disc body 51 where the liquid fuel is dropped. The concentration of the fuel gas generated in 70 can be made uniform, and stable combustion can be performed.

  In addition, in the rotating member 50 of this embodiment, the structure provided with the nine stirring blades 52 (auxiliary stirring blade 53) and the five openings 55 was described as an example. It is possible to appropriately change the number of these arrays depending on the shape and the like.

Next, the configuration and operation of the rotating member 80 will be described as a reference example that can be employed in the combustion apparatus 1 described above.
5 is an exploded perspective view and a perspective view showing a rotating member 80 of a reference example that can be employed in the combustion apparatus 1, and FIG. 6 is a cross-sectional view and a plan view of the vaporizing section 7 of the combustion apparatus 1 that employs the rotating member 80 of FIG. FIG. 7 is a perspective view showing a modification of the auxiliary member that can be employed in the rotating member 80 of FIG.

The rotating member 80 of this reference example is configured by combining a rotating member main body 81 and an auxiliary member 82 as shown in FIG.
The rotating member main body 81 is a member having the same shape as the rotating member 210 (see FIG. 18) described in the conventional example. In other words, the rotating member main body 81 has a bottomed cylindrical shape having stirring blades 81b formed by cutting and raising the peripheral edge over the entire circumference of the disk body 81a. An auxiliary stirring blade 81c formed by bending a part thereof inward is provided.

The stirring blades 81b (auxiliary stirring blades 81c) are substantially rectangular, and nine stirring blades 81b are arranged at equal intervals on the periphery of the disc body 81a. The auxiliary stirring blades 81c are provided on the respective stirring blades 81b, and have a substantially triangular shape that increases in width toward the upper side. A slit 81d is formed between adjacent stirring blades 81b.
In the center of the disc body 81a, a fixing hole 81e is formed to pass through and fix the threaded portion 30c at the tip of the rotating shaft 30b.

  On the other hand, the auxiliary member 82 has a disk shape, and has a fixing hole 82a through which the threaded portion 30c of the rotary shaft 30b passes, and nine auxiliary members 82 on the circumference near the outer periphery centering on the fixing hole 82a. The openings 82b are arranged at equal intervals.

The rotating member 80 of this reference example specifically has the following dimensions.
In other words, the rotating member main body 81 has a disk body 81a having an outer diameter of approximately 45 mm, the stirring blade 81b having a width of approximately 9 mm and a height of approximately 10 mm, and the auxiliary stirring blade 81c having a width of approximately 8 mm and a height of approximately 9 mm.
The auxiliary member 82 has an outer diameter of approximately 23 mm, and the opening 82b has an inner diameter of approximately 3 mm.

  The rotating member 80 is fixed to the rotating shaft 30b using a nut N as shown in FIG. That is, the auxiliary member 82 is superposed on the center of the disc body 81a of the rotating member main body 81, the fixing hole 82a and the fixing hole 81e are passed through the screw portion 30c of the rotating shaft 30b, and the nut is formed at the protruding portion of the screw portion 30c. N is fastened and fixed.

  When the rotating member 80 is fixed to the rotating shaft 30b, the bottom of the opening 82b of the auxiliary member 82 is closed by the disc body 81a of the rotating member main body 81, and the opening 82b is the thickness of the auxiliary member 82, as shown in FIG. And function as a recess having the same depth. When the rotating member 80 is fixed to the rotating shaft 30b, the tip of the fuel pipe 14 is positioned directly above the circumference where the recesses (openings) 82b are arranged.

Next, the operation of the rotating member 80 will be described with reference to FIG.
When the rotating member 80 is driven to rotate counterclockwise and liquid fuel is dropped from the fuel pipe 14 to the rotating member 80, a part of the dropped liquid fuel is dispersed in the recess 82b as shown in FIG. 6B. The remaining portion diffuses to the surface of the auxiliary member 82. The liquid fuel diffused on the surface of the auxiliary member 82 flows outward in the radial direction by the centrifugal force accompanying the rotation, and part of the liquid fuel is scattered as it is toward the peripheral wall 72 of the vaporizing chamber 70 through the slit 81d, and the remaining portion Further, while staying along the stirring blade 81b, it gradually flows toward the slit 81d and scatters toward the peripheral wall 72.

  On the other hand, the liquid fuel that has flowed into the recess 82b gradually flows out of the recess 82b due to the centrifugal force accompanying rotation, and part of the liquid fuel scatters toward the peripheral wall 72 of the vaporization chamber 70 through the slit 81d, and the remaining portion is further stirred. While staying along the blade 81 b, it gradually flows toward the slit 81 d and scatters toward the peripheral wall 72.

  In other words, according to the rotating member 80, by forming the plurality of recesses 82b, the liquid fuel dropped on the disk body 81a is retained in the recesses 82b, and is gradually moved while being rotated by applying a sufficient rotational force. Can be scattered. Therefore, as compared with the configuration in which the auxiliary member 82 is not provided, the time during which the dropped liquid fuel stays in the rotating member 80 can be increased, and the liquid fuel is scattered uniformly over the entire circumference of the vaporizing chamber 70. It becomes possible to make it.

  In particular, even when the rotational speed of the rotating member 80 decreases or when the amount of liquid fuel dropped increases according to the amount of combustion of the combustion device 1, the dropped liquid fuel is gradually scattered by the rotating member 80. Therefore, the amount of liquid fuel scattered can be made uniform over the entire circumference of the peripheral wall 72 of the vaporizing chamber 70.

In the rotating member 80 of this reference example , when the inner diameter of the opening 82b provided in the auxiliary member 82 is set to about 3 mm, the amount of liquid fuel scattered is most uniform. That is, by setting the maximum width (inner diameter) in the rotation direction of the unevenness (opening) 82b to the above value, the dropped liquid fuel can be effectively dispersed in the unevenness, and the entire circumference of the rotating member can be dispersed. Thus, it was possible to make the amount of scattered liquid fuel uniform.

  When the maximum width (inner diameter) of the unevenness (opening) 82b in the rotation direction is less than 2 mm, the dispersibility of the dropped liquid fuel is poor and the effect of providing the unevenness is low. The maximum width of the unevenness in the rotation direction is preferably 2 mm or more. Within this range, the inner diameter of the opening 82b can be appropriately set according to the outer diameter and the number of rotations of the rotating member 80.

Further, in the rotating member 80 of this reference example , the fixed angle of the auxiliary member 82 with respect to the rotating member main body 81 can be obtained in advance by experiments. That is, the fixed angle at which the amount of liquid fuel scattered on the peripheral wall 72 of the vaporization chamber 70 is most uniform can be obtained in advance. In the case where the fixed angle is set in advance, in FIG. 5A, the fixing hole 82a provided in the auxiliary member 82 has the same shape as the fixing hole 81e of the rotating member main body 81, so that the auxiliary member for the rotating member main body 81 is obtained. The fixed angle of 82 is uniquely determined and can be assembled very easily.

Here, although the auxiliary member 82 shown in FIG. 5A is adopted as the rotating member 80 of this reference example, the rotating member 80 adopting auxiliary members having different shapes can be formed. Below, with reference to FIG. 7, the structure of the auxiliary members 83-86 of a modification is demonstrated.

As shown in FIG. 7A, the auxiliary member 83 has a disk shape, has a fixing hole 83a through which the threaded portion 30c of the rotating shaft 30b passes, and has nine notch portions in the vicinity of the outer peripheral edge. 83b are arranged at equal intervals. The notch 83b has a shape in which the radially outer portion of the opening 82b is notched to the periphery in the auxiliary member 82 (see FIG. 5a). In this reference example , the width of the cutout portion 83b in the rotation direction is set to about 3 mm.

  When the auxiliary member 83 is fixed to the rotating member main body 81, the lower part of the notch 83b is closed by the disc body 81a of the rotating member main body 81, and the notch 83b functions as a recess. The tip of the fuel pipe 14 is located directly above the circumference where the recesses (notches) 83b are arranged. As a result, the dropped liquid fuel is dispersed and flows into the recess 83b, and the amount of liquid fuel scattered can be made uniform as in the case of the auxiliary member 82 (see FIG. 5a).

  As shown in FIG. 7B, the auxiliary member 84 has a shape obtained by adding a cut and raised portion 83c to the auxiliary member 83 (see FIG. 7a). In other words, the auxiliary member 83 has a shape in which nine cut-and-raised portions 83c are formed over the entire circumference by cutting and raising the peripheral edge between the adjacent cut-out portions 83b upward. These cut and raised portions 83c function as convex portions.

  According to the auxiliary member 84, of the dropped liquid fuel, the liquid fuel that has flowed into the recess (notch) 83b gradually flows outward in the radial direction while receiving the centrifugal force associated with the rotation. The remaining part of the water stays along the convex part (cut-and-raised part) 83c while diffusing on the surface, and flows radially outward from both ends of the convex part 83c by centrifugal force accompanying rotation. Thereby, the residence time of the liquid fuel in the auxiliary member 84 can be further increased, and the scattering amount of the liquid fuel can be made uniform.

As shown in FIG. 7C, the auxiliary member 85 has a shape in which an annular peripheral wall 85c protruding upward is added to the periphery of the auxiliary member 83 (see FIG. 7A). The auxiliary member 85 is provided with a fixing hole 85a in the center of the disc, and the peripheral edge of the metal flat plate in which nine substantially semicircular openings 85b are arranged at equal intervals in the vicinity of the peripheral edge, substantially upward at right angles over the entire circumference. Made by bending.
Thereby, in the auxiliary member 85, the opening 85b functions as a concave portion 85b opened outward in the radial direction, and the peripheral wall portion 85c functions as a convex portion 85c. In this reference example , the width of the opening 85b in the rotation direction is set to about 3 mm.

  According to the auxiliary member 85, of the dropped liquid fuel, the liquid fuel that has flowed into the recess (opening) 85b gradually flows outward in the radial direction while receiving the centrifugal force accompanying the rotation. The remaining portion of the liquid fuel stays along the convex portion (peripheral wall portion) 85c by the centrifugal force accompanying the rotation while diffusing to the surface, and gradually climbs over the convex portion (peripheral wall portion) 85c by the centrifugal force to radially outward. It flows toward. Thereby, the residence time of the liquid fuel in the auxiliary member 85 can be increased, and the amount of scattering of the liquid fuel can be made more uniform.

As shown in FIG. 7 (d), the auxiliary member 86 is provided with a fixing hole 86a at the center of the disc and nine cut and raised portions 86b extending radially outward at equal intervals around the entire circumference. It has an arrayed shape. In the auxiliary member 86, the cut and raised portion 86b functions as the convex portion 86b, and the cut and raised portion functions as the concave portion 86c. In this reference example , the width of the concave portion 86c in the rotation direction is set to about 3 mm.

  According to the auxiliary member 86, of the dropped liquid fuel, the liquid fuel that has flowed into the recess 86c gradually flows outward in the radial direction while receiving the centrifugal force accompanying the rotation. Further, the remaining portion of the liquid fuel is diffused to the surface due to the centrifugal force accompanying the rotation, receives the rotational force by the convex portion (cut-and-raised portion) 86b, and flows outward in the radial direction. Thereby, the residence time of the liquid fuel in the auxiliary member 86 can be increased, and the amount of scattering of the liquid fuel can be made uniform.

  In the auxiliary members 83 to 86 shown in FIG. 7, the fixing holes (83a, 85a, 86a) provided in the center are shown as round holes. However, the fixing holes 81e provided in the rotating member main body 81 shown in FIG. It is possible to uniquely fix the positional relationship with the stirring blade 81b so that the amount of scattering in the rotation direction is uniform.

  The auxiliary members (82 to 86) shown in FIGS. 5 and 7 have the same number of recesses or protrusions as the stirring blades 81b of the rotating member main body 81. However, the rotating member 80 and the vaporizing chamber 70 are provided. It is possible to appropriately change the number of these arrays according to the shape and the like.

Here, the rotating member 80 shown in FIG. 5 has a structure in which the rotating member main body 81 and the auxiliary member 82 (83 to 86) having irregularities are combined. It is also possible to adopt a configuration in which these auxiliary members are combined.
FIG. 8 is an exploded perspective view of a rotating member 88 of a reference example that can be employed in the combustion apparatus 1 having such a configuration.

The rotating member 88 is formed by combining a rotating member main body 81 ′ and a disk-shaped auxiliary member 87. The rotating member main body 81 ′ is a member obtained by adding a plurality of openings 81f to the disc body 81a of the rotating member main body 81 shown in FIG. That is, the rotating member main body 81 ′ has a shape in which nine round openings 81f are arranged at equal intervals on the circumference centered on the central fixing hole 81e, and the circumference in which the openings 81f are arranged. The front end of the fuel pipe 14 is located directly above. In this reference example , the inner diameter of the opening 81f was set to about 3 mm.
The auxiliary member 87 is a washer-shaped member having an opening 87a in the center of the disk, and the outer diameter of the auxiliary member 87 is slightly larger than the diameter of the circumference where the openings 81f are arranged.

The rotating member 88 is formed by superimposing an auxiliary member 87 on the bottom surface side of the disc body 81a of the rotating member main body 81 ′ and fixing both of them to the rotating shaft 30b using a nut N.
When the auxiliary member 87 is overlaid on the disc body 81a, the bottom of each opening 81f of the disc body 81a is closed by the auxiliary member 87, and each opening 81f functions as a recess 81f.
As a result, the rotating member 88 has the same function as the rotating member 80 (see FIG. 5b), and the liquid fuel can be scattered uniformly over the entire circumference of the rotating member 88.

  The rotating member 88 shown in FIG. 8 has a configuration in which the opening 81f is provided in the disc body 81a of the rotating member main body 81 ′. However, the disc body 81a is provided with a cut-and-raised portion and a notch portion, and It is also possible to adopt a configuration in which a disk-shaped auxiliary member is attached so as to close the bottom portion of the raising portion or the notch portion.

By the way, the rotating members 80 and 88 shown in FIGS. 5 and 8 are configured by combining the rotating member main body 81 (81 ′) and the auxiliary member 82 (87), but without using the auxiliary member. It is also possible to manufacture a rotating member having irregularities formed on the rotating member body.
FIG. 9 is a perspective view showing rotating members 90 to 92 of another embodiment having such a configuration and can be employed in the combustion apparatus 1, and FIG. 10 shows rotating members 93 to 95 of still another reference example. It is a perspective view.

  As shown in FIG. 9A, the rotating member 90 has a configuration in which irregularities are additionally formed in the central portion of the rotating member main body 81 (see FIG. 5A) by step pressing. Here, the step pressing process is a processing method of forming irregularities on the metal plate to be processed by placing the metal plate to be processed between the male mold and the female mold facing each other and performing press processing.

In other words, the rotating member 90 is formed by stepping a circular stepped portion 90a projecting upward having substantially the same diameter as the auxiliary member 82 (see FIG. 5a) at the center of the disc body 81a of the rotating member main body 81. And a small circular recess 90b protruding downward in the vicinity of the periphery of the circular stepped portion 90a is formed by step pressing. In this reference example , the inner diameter of the recess 90b was set to about 3 mm.

Nine recesses 90b are arranged at equal intervals on the circumference centered on the fixing hole 81e, and the fuel pipe 14 is positioned directly above the circumference where the recesses 90b are arranged.
Therefore, the rotating member 90 of the present reference example can arrange the concave portions 90b formed by the step pressing process on the disc body 81a without using an auxiliary member or the like. As a result, the rotating member 90 has the same function as the rotating member 80 (see FIG. 5b), and the dropped liquid fuel can be uniformly scattered over the entire circumference of the rotating member 90.

As shown in FIG. 9B, the rotating member 91 has a configuration in which a concave portion is additionally formed in the central portion of the rotating member main body 81 (see FIG. 5A) by step pressing.
That is, the rotating member 91 is manufactured by forming a plurality of small circular recesses 91a projecting downward at the center of the disc body 81a of the rotating member main body 81 by step pressing. Nine recesses 91a are arranged at equal intervals on the circumference centered on the fixing hole 81e of the disk body 81a, and the fuel pipe 14 is positioned directly above the circumference where the recesses 91a are arranged. In this reference example , the inner diameter of the recess 91a was set to about 3 mm.

Accordingly, the rotation member 91 of the present embodiment is, without using any auxiliary member can be arranged a recess 91a formed by the stages embossing a disc body 81a, the rotary member 80 (see FIG. 5b) Similarly, the dropped liquid fuel can be uniformly scattered over the entire circumference of the rotating member 91.

As shown in FIG. 9C, the rotating member 92 has a configuration in which a convex portion is additionally formed by a step pressing process at the central portion of the rotating member main body 81 (see FIG. 5A).
That is, the rotating member 92 is formed by forming a circular stepped portion 92a substantially the same shape as the auxiliary member 83 (see FIG. 7a) at the center of the disc body 81a of the rotating member main body 81. Nine concave portions 92b are formed in the peripheral portion of the circular stepped portion 92a. Nine recesses 92b are formed at equal intervals on the circumference centered on the fixing hole 81e of the disk body 81a, and the fuel pipe 14 is positioned directly above the circumference where the recesses 92b are arranged. In this reference example , the width of the recess 92b in the rotation direction was set to about 3 mm.

Therefore, the rotating member 91 of the present reference example can arrange the concave portions 92b formed by the step pressing process on the disc body 81a without using an auxiliary member or the like, and the auxiliary member 83 (see FIG. 7a) can be arranged. Similar to the rotating member 80 used (see FIG. 5 b), the dropped liquid fuel can be uniformly scattered over the entire circumference of the rotating member 92.

As shown in FIG. 10A, the rotating member 93 has a configuration in which an annular convex portion is additionally formed by a step pressing process at the central portion of the rotating member main body 81 (see FIG. 5A).
That is, the rotating member 93 is formed by forming a circular convex portion 93a having substantially the same diameter as the auxiliary member 82 (see FIG. 5a) at the center of the disc body 81a of the rotating member main body 81 by step pressing. . The annular convex portion 93a is formed on the circumference centered on the fixing hole 81e of the disk body 81a, and the liquid fuel dripping portion by the fuel pipe 14 is located inside the annular convex portion 93a.

According to the rotating member 93 of this reference example , the liquid fuel dropped from the fuel pipe 14 is dropped and diffused inward of the annular protrusion 93a, and the diffused liquid fuel is annularly protruded by the centrifugal force associated with the rotational force. While staying along the peripheral wall of the portion 93a, it gradually flows outward in the radial direction beyond the annular convex portion 93a. As a result, the residence time of the liquid fuel dropped onto the rotating member 93 can be increased, and the liquid fuel can be uniformly scattered over the entire circumference of the rotating member 93.

As shown in FIG. 10B, the rotating member 94 has a structure in which a plurality of convex portions are additionally formed in a ring shape by step pressing at the central portion of the rotating member main body 81 (see FIG. 5A).
That is, the rotating member 93 steps the plurality of convex portions 94a along the circumference of the same diameter as the auxiliary member 82 (see FIG. 5a) at the central portion of the disc body 81a of the rotating member main body 81. It is formed in an annular shape by processing. Nine convex portions 94a are arranged at equal intervals on the circumference centered on the fixing hole 81e of the disk body 81a, and the liquid fuel dripping site by the fuel pipe 14 is located inside the convex portion 94a. In the present embodiment, the width of the convex portion 94a in the rotation direction is approximately 3 mm.

According to the rotating member 94 of this reference example , the liquid fuel dropped from the fuel pipe 14 is dropped and diffused inward of the convex portion 94a, and a part of the diffused liquid fuel is caused by the centrifugal force accompanying the rotational force. While staying along the inner peripheral wall of the convex portion 94a, it gradually flows outward in the radial direction via the gap 94b between the adjacent convex portions 94a. Further, the remaining portion of the diffused liquid fuel flows outward in the radial direction through the gap 94b between the adjacent convex portions 94a as it is due to centrifugal force.
As a result, the residence time of the liquid fuel dropped on the rotating member 94 can be increased, and the liquid fuel can be uniformly scattered over the entire circumference of the rotating member 94.

As shown in FIG. 10C, the rotating member 95 has a configuration in which a concave portion is additionally formed in the central portion of the rotating member main body 81 (see FIG. 5A) by step pressing.
That is, the rotating member 95 is formed by forming a circular recess 95a having substantially the same outer diameter as that of the auxiliary member 82 (see FIG. 5a) at the central portion of the disc body 81a of the rotating member main body 81 by step pressing. . The circular concave portion 95a is formed in a circular shape centered on the fixing hole 81e of the disc body 81a, and the liquid fuel dropping portion of the fuel pipe 14 is located inside the circular concave portion 95a.

According to the rotating member 95 of the present reference example , the liquid fuel dropped from the fuel pipe 14 is dropped and diffused inward of the circular recess 95a, and the diffused liquid fuel is circularly recessed 95a due to the centrifugal force accompanying the rotational force. The liquid gradually flows outward in the radial direction beyond the peripheral wall of the circular recess 95a while staying along the peripheral wall. As a result, the residence time of the liquid fuel dropped onto the rotating member 95 can be increased, and the liquid fuel can be uniformly scattered over the entire circumference of the rotating member 95.

In the rotating members 90 to 92 and 94 shown in this reference example , the number of concave portions and convex portions provided in the disc body 81a is set to the same number as that of the stirring blade 81b, but depending on the shape of the rotating member and the vaporizing chamber 70. It is also possible to provide a different number of irregularities from the stirring blade 81b.

Here, all the rotating members 80 and 90 to 95 shown in the reference example adopt a configuration in which an auxiliary member is combined with the same rotating member main body 81 or a configuration in which unevenness is provided on the same rotating member main body 81. However, it is also possible to employ rotating member bodies having different shapes.
11 and 12 are perspective views showing rotating members 96 and 97 of another reference example using rotating member bodies having different shapes.

  As shown in FIG. 11, the rotating member 96 is configured by combining a rotating member main body 89 and an auxiliary member 82 (see FIG. 5a). The rotating member main body 89 includes an auxiliary stirring blade 81c ′ expanded in a rectangular shape in place of the triangular auxiliary stirring blade 81c in the rotating member main body 81 (see FIG. 5A). By enlarging the auxiliary stirring blade 81c ′, the rotation of the fuel gas and air in the vaporization chamber 70 is promoted with the rotation of the rotating member main body 89, and the outward flow in the radial direction due to the centrifugal force increases. The flow of fuel gas to the combustion unit 6 increases. As a result, the primary air can be sufficiently supplied to the vaporizing section 7 that has a negative pressure, and stable combustion can be performed.

  11 employs a configuration in which the rotating member main body 89 and the auxiliary member 82 are combined. However, any of the auxiliary members 83 to 86 (see FIG. 7) is combined with the rotating member main body 89. It is also possible to adopt. Further, it is possible to adopt a configuration in which an auxiliary member 87 (see FIG. 8) is combined with a rotating member main body 89 provided with an opening 81f (see FIG. 8), a cut-and-raised portion, and a notch. Furthermore, it is possible to adopt a configuration in which the rotating member main body 89 is provided with the unevenness shown in FIGS.

  As shown in FIG. 12, the rotating member 97 is configured by combining the rotating member main body 56 and the auxiliary member 82 (see FIG. 5a). The rotating member main body 56 has a shape in which, in the rotating member 50 (see FIG. 3), the opening 55 is removed and an auxiliary stirring blade 53 ′ expanded in a rectangular shape is used instead of the triangular auxiliary stirring blade 53. By enlarging the auxiliary stirring blade 53 ′, the rotation of the fuel gas and air in the vaporizing chamber 70 is promoted with the rotation of the rotating member main body 56, and the outward flow in the radial direction due to the centrifugal force increases. The flow of the fuel gas to the combustion unit 6 is promoted. Thereby, it becomes possible to sufficiently supply primary air to the vaporization section 7 that is at a negative pressure, and stable combustion can be performed.

  In addition, although the rotation member 97 shown in FIG. 12 employ | adopted the structure which combined the rotation member main body 56 and the auxiliary member 82, either of the auxiliary members 83-86 (refer FIG. 7) was combined with the rotation member main body 56. It is also possible to adopt a configuration. Further, it is possible to adopt a configuration in which an auxiliary member 87 (see FIG. 8) is combined with a member provided with an opening 81f (see FIG. 8), a cut-and-raised portion, and a notch in the rotating member main body 56. Furthermore, it is also possible to adopt a configuration in which the irregularities shown in FIGS.

Here, all the rotating members described so far have a configuration in which irregularities are provided in the vicinity of the liquid fuel dropping site. However, the present invention is not limited to such a configuration, and it is also possible to adopt a configuration in which the amount of scattered liquid fuel is made uniform by providing irregularities in the vicinity of the outer peripheral edge of the disc body. Below, the reference example and embodiment of the rotation member which employ | adopted such a structure are demonstrated.

13 is a perspective view and a plan view showing a rotating member 100 of another reference example that can be employed in the combustion apparatus 1 shown in FIG.
The rotating member 100 has a configuration in which stirring blades 102 (auxiliary stirring blades 103) and cut and raised (convex portions) 104 are alternately arranged along the outer peripheral edge of the disk body 101.

  That is, the rotating member 100 has a bottomed cylindrical shape in which the outer peripheral edge is cut and raised around the entire circumference of the disc body 101 to form the stirring blades 102 as shown in FIG. , An auxiliary stirring blade 103 formed by bending a part thereof inward is provided. Nine sets of stirring blades 102 provided with auxiliary stirring blades 103 are provided at equal intervals along the outer peripheral edge of the disk body 101, and the outer peripheral edges between adjacent stirring blades 52 are cut and raised upward. (Protrusions) 104 are formed.

  The stirring blade 102 has a rectangular shape, and is bent upward at a substantially right angle with respect to the disc body 101. The auxiliary stirring blade 103 has substantially the same height as the stirring blade 102, has a trapezoidal shape that becomes wider toward the upper side, and is bent inward at a substantially right angle to the stirring blade 102. .

The rotating member 100 of this reference example has a structure in which the width of the stirring blade 102 is narrowed while the width of the auxiliary stirring blade 103 is expanded. Accordingly, the rotation of the rotating member 100 efficiently generates a rotating air flow at the auxiliary stirring blade 103, and the flow resistance of the stirring blade 102 against the air flow directed radially outward by centrifugal force is reduced. It is structured to efficiently generate an air flow directed radially outward.

  By the way, if the width of the stirring blade 102 is narrowed, the amount of liquid fuel that flows on the surface of the disk body 101 radially outward decreases in the stirring blade 102, and the amount of scattering tends to be non-uniform. Therefore, the rotating member 100 of the present embodiment has a configuration in which the raised portion (convex portion) 104 is provided along the outer peripheral edge of the disc body 101 in order to compensate for a decrease in the amount of liquid fuel retained in the stirring blade 102. Adopted.

  A fixing hole 106 for fixing the rotating member 100 to the rotating shaft is provided in the center of the disc body 101. The fixing hole 106 has a shape in which a part of the circle is omitted, and is inserted into the screw portion 30c at the tip of the rotating shaft 30b and fastened and fixed with a nut N.

According to the rotating member 100 of the present reference example , as shown in FIG. 13B, the liquid fuel dropped from the fuel pipe 14 diffuses on the surface of the disk body 101 and is radially outward by the centrifugal force accompanying the rotation. It flows toward. The flowing liquid fuel is gradually scattered outward from the slits 105 on both sides while staying along the inside of the cut and raised portion (convex portion) 104.

Thereby, the residence time in the rotating member 100 of liquid fuel can be increased.
In particular, since the rotating member 100 of the present reference example has a structure in which the width of the stirring blade 102 is reduced as described above, the amount of liquid fuel retained by the stirring blade 102 is reduced. By providing the cut-and-raised portion 104 between them, the retention amount of the liquid fuel is improved.

As described above, according to the rotating member 100 of the present reference example , by providing the cut-and-raised portion (convex portion) 104 between the adjacent stirring blades 102, the residence time of the liquid fuel is increased, whereby the rotating member 100. It becomes possible to evenly disperse the liquid fuel over the entire circumference.
Further, by narrowing the width of the stirring blade 102 and increasing the width of the auxiliary stirring blade 103, it is possible to effectively generate an air flow that is directed radially outward with the rotation of the rotating member 100. It becomes possible to supply sufficient primary air to the section.

Note that the rotating member 100 of this reference example employs a configuration in which a raised (convex) portion 104 is provided along the outer peripheral edge of the disc body 101. In addition to this configuration, the rotating member 50 ( It is also possible to use a configuration in which the openings 55 described in FIG. 3) are arranged in the vicinity of the liquid fuel dropping site. Moreover, it is also possible to use together the structure which added the auxiliary member 82 described in the said rotation member 80 (refer FIG. 5) and the auxiliary members 83-86 (refer FIG. 7). Furthermore, a configuration in which the unevenness provided on the rotating members 90 to 95 (see FIGS. 9 and 10) is provided in the vicinity of the dropping portion of the liquid fuel may be used in combination.

FIG. 14 is a perspective view and a plan view showing a rotating member 110 of an embodiment that can be employed in the combustion apparatus 1 shown in FIG.
The rotating member 110 of the present embodiment is a partial modification of the structure of the rotating member 100 (see FIG. 13). That is, the rotating member 110 has a structure in which an opening 107 is provided along the vicinity of the outer peripheral edge of the disc body 101 in place of the cut and raised portion 104 provided on the outer peripheral edge of the disc body 101. Accordingly, the same components are denoted by the same reference numerals, and redundant description is omitted.

  The opening 107 has a shape in which the inner peripheral edge protrudes toward the side where the liquid fuel is dropped, and is formed by burring. One opening 107 is arranged on the circumference close to the outer peripheral edge of the disc body 101 and is arranged at a substantially central portion between the adjacent stirring blades 102. The protruding portion of the opening 107 functions as the convex portion 107.

  According to the rotating member 110 of the present embodiment, as shown in FIG. 14B, the liquid fuel dropped from the fuel pipe 14 diffuses on the surface of the disc body 101, and the diffused liquid fuel is subjected to centrifugal force accompanying rotation. To flow radially outward. Then, the liquid fuel flowing outward in the radial direction stays along the convex portion (opening) 107 and gradually scatters outward from the slits 108 on both sides.

  As a result, similarly to the rotating member 100 (see FIG. 13), the reduction in the amount of liquid fuel retained by the narrow stirring blade 102 can be compensated by the opening 107, and the liquid is spread over the entire circumference of the rotating member 110. It becomes possible to disperse the fuel uniformly.

  Further, according to the rotating member 110 of the present embodiment, by providing the opening 107, the primary air and the fuel gas can flow through the opening 107, the mixing is promoted, and the concentration of the fuel gas (mixing is further uniformed). Gas) can be obtained.

  In addition, although the structure which provided the opening (convex part) 107 along the outer periphery periphery of the disc body 101 was employ | adopted for the rotation member 110 of this embodiment, in addition to this structure, the said rotation member 50 (FIG. 3). It is also possible to use a configuration in which the openings 55 described in the reference) are arranged in the vicinity of the liquid fuel dropping site. Further, the auxiliary member 82 and the auxiliary members 83 to 86 (see FIG. 7) described in the rotating member 80 (see FIG. 5) are added, or the rotating members 90 to 95 (see FIGS. 9 and 10). It is also possible to use a configuration in which the provided unevenness is provided in the vicinity of the dropping portion of the liquid fuel.

15 is an exploded perspective view, a perspective view, and a plan view showing a rotating member 120 of another reference example that can be adopted in the combustion apparatus 1 shown in FIG.
The rotating member 120 of this reference example is configured by combining a rotating member main body 121 and an auxiliary member 122 as shown in FIG.

  The rotating member main body 121 has the same structure as that obtained by removing the cut and raised portion 104 from the rotating member 100 (see FIG. 13). Accordingly, the same components are denoted by the same reference numerals, and redundant description is omitted.

  The auxiliary member 122 is a disk-shaped member having substantially the same outer diameter as the disk body 101 of the rotating member main body 121, and a plurality of cut-and-raised portions 124 are provided along the outer peripheral edge. In other words, the auxiliary member 122 is a member in which nine cut-and-raised portions 124 are arranged at equal intervals on the outer peripheral edge of the disk body 123 having substantially the same outer diameter as the disk body 101 of the rotating member main body 121. The cut and raised portion 124 has a width slightly narrower than the interval between the adjacent stirring blades 102 of the rotating member main body 121. A fixing hole 125 having the same shape as the fixing hole 106 of the rotating member main body 121 is provided in the center of the auxiliary member 122.

  When fixing the rotating member 120 to the rotating shaft 30b, as shown in FIG. 15A, the auxiliary member 122 has its cut-and-raised portion 124 directed upward between the adjacent stirring blades 102 of the rotating member main body 121. Overlapping so that they are positioned. Then, the threaded portion 30c of the rotating shaft 30b is passed through both the fixing holes 106 and 125 and fastened with a nut N to be fixed.

  When the rotating member 120 is fixed to the rotating shaft 30b, a cut-and-raised portion 124 is located between adjacent stirring blades 102 as shown in FIG. 15B, and the cut-and-raised portion 124 is a circle of the rotating member main body 121. Projecting upward from the surface of the plate body 101. Further, slits 105 are formed between the circumferential ends of the cut and raised portion 124 and the adjacent stirring blades 102.

Therefore, according to the rotating member 120 of the present reference example, the rotating member having the same function as the rotating member 100 (see FIG. 13) is formed by combining the rotating member main body 121 and the auxiliary member 122. Thereby, the residence time of the liquid fuel can be increased, and the liquid fuel can be evenly scattered over the entire circumference of the rotating member 120.

Particularly, according to the rotating member 120 of the present reference example , the rotating member main body 121 and the auxiliary member 122 are separated. Therefore, there is no shape limitation of the cut-and-raised portion 124 and the auxiliary stirring blade 103 as compared with a structure in which a single metal flat plate is bent and manufactured as in the rotating member 100 (see FIG. 13). In other words, regardless of the height of the auxiliary stirring blade 103, the height of the cut-and-raised portion 124 is optimally set to reduce the flow resistance of the air flow toward the radially outward direction while promoting the retention of the liquid fuel. Can do. This makes it possible to easily design the rotating member 120 that equalizes the amount of liquid fuel scattered over the entire circumference and promotes the amount of primary air introduced.

  Further, by adding the auxiliary member 122 to the rotating member main body 121 that has been conventionally employed, it is possible to obtain a rotating member that achieves uniform scattering.

16 is an exploded perspective view, a perspective view, and a plan view showing a rotating member 130 of another reference example that can be employed in the combustion apparatus 1 shown in FIG.
The rotating member 130 of this reference example is configured by combining a rotating member main body 131, a spacer 133, and an auxiliary member 134 as shown in FIG.

The rotating member body 131 has a structure obtained by modifying the rotating member 100 (see FIG. 13).
Accordingly, the same components are denoted by the same reference numerals, and redundant description is omitted.
That is, the rotating member main body 131 has a structure in which the cut and raised portions 104 are removed from the rotating member 100 and nine openings 132 are arranged at equal intervals on the circumference corresponding to the liquid fuel dropping site.

The auxiliary member 134 is a disk-shaped member having substantially the same outer diameter as the disk body 101 of the rotating member main body 131, and a fixing hole 135 having the same shape as the fixing hole 106 of the rotating member main body 131 is provided at the center. It has been.
The spacer 133 is a washer-shaped member and has a function of being inserted between the rotating member main body 131 and the auxiliary member 134 to create a gap.

  When the rotating member 130 is fixed to the rotating shaft 30b, the rotating member main body 131, the spacer 133 and the auxiliary member 134 are sequentially inserted into the threaded portion 30c of the rotating shaft 30b and fastened with a nut N as shown in FIG. And fix. That is, the fixing hole 106 of the rotating member main body 131 is inserted into the threaded portion 30 c of the rotating shaft 30 b and the spacer 133 is inserted, and further, the fixing hole 135 of the auxiliary member 134 is inserted and fastened with the nut N.

When the rotating member 130 is fixed to the rotating shaft 30b, a gap 136 is formed by the spacer 133 between the disc body 101 of the rotating member main body 131 and the auxiliary member 134 as shown in FIG. That is, a gap 136 that extends in a circular shape is formed between the disc body 101 of the rotating member main body 131 and the auxiliary member 134.
Further, the openings 132 in which the disc bodies 101 are arranged function as the concave portions 132 whose bottom portions communicate with the gap 136.

According to the rotating member 130 of this reference example , as shown in FIGS. 16B and 16C, a part of the dropped liquid fuel is diffused on the surface of the disc body 101, and the rest is the disc body 101. It flows into the gap 136 through the opening 132 and diffuses. The liquid fuel diffused on the surface of the disk body 101 flows outward in the radial direction by the centrifugal force accompanying the rotation and scatters outward from the slit 105 between the adjacent stirring blades 102. Further, the liquid fuel that has flowed into the gap 136 flows radially outward in the gap 136 (the upper surface of the auxiliary member 134) due to the centrifugal force accompanying rotation, and is scattered outward from the outer peripheral edge of the gap 136.

That is, according to the rotating member 130 of the present reference example , the dropped liquid fuel flows in a distributed manner in two paths of the surface of the disc body 101 and the gap 136, and the liquid in each path is equivalently. The amount of fuel flow can be reduced. As a result, a sufficient rotational force can be applied to the liquid fuel by the rotation of the rotating member 130, and the liquid fuel can be uniformly scattered over the entire circumference of the rotating member 130.

In the rotating member 130 of this reference example , the openings 132 are arranged in the vicinity of the liquid fuel dropping portion of the rotating member main body 131. However, instead of the openings 132, it is possible to adopt a structure in which a cut and raised portion is provided. It is. Moreover, it is also possible to take the structure which provided the cut-and-raised in the outer periphery of the disc body 101 between adjacent stirring blades 102, and the outer periphery of the auxiliary member 134. FIG.

It is sectional drawing of the combustion apparatus which concerns on embodiment of this invention. It is a partially broken perspective view which shows the internal structure of the vaporization part periphery of the combustion apparatus of FIG. (A) is a perspective view which shows embodiment of the rotating member employ | adopted as the combustion apparatus of FIG. 1, (b) is the top view. (A) is sectional drawing of the vaporization part of the combustion apparatus which employ | adopted the rotation member of FIG. 3, (b) is the top view. (A) is a disassembled perspective view of the rotation member of the reference example employable for the combustion apparatus of FIG. 1, (b) is the perspective view. (A) is sectional drawing of the vaporization part which employ | adopted the rotating member of FIG. 5, (b) is the top view. (A)-(d) is a perspective view which shows the modification of the auxiliary member employable as the rotation member of FIG. It is a disassembled perspective view of the rotating member of another reference example employable for the combustion apparatus of FIG. (A)-(c) is a perspective view of the rotating member of another reference example employable for the combustion apparatus of FIG. (A)-(c) is a perspective view of the rotating member of another reference example employable for the combustion apparatus of FIG. It is a perspective view which shows the rotation member of the reference example using the rotation member main body from which a shape differs. It is a perspective view which shows the rotation member of the reference example using another rotation member main body from which a shape differs. (A) is a perspective view of the rotating member of another reference example employable in the combustion apparatus of FIG. 1, (b) is the top view. (A) is a perspective view of the rotating member of another embodiment which can be employ | adopted as the combustion apparatus of FIG. 1, (b) is the top view. (A) is an exploded perspective view of a rotating member of another reference example that can be employed in the combustion apparatus of FIG. 1, (b) is a perspective view thereof, and (c) is a plan view thereof. (A) is an exploded perspective view of a rotating member of another reference example that can be employed in the combustion apparatus of FIG. 1, (b) is a perspective view thereof, and (c) is a plan view thereof. (A) is sectional drawing of the vaporization part employ | adopted as the combustion apparatus disclosed by patent document 1, (b) is the top view. 2 is a perspective view of a rotating member employed in the combustion apparatus disclosed in Patent Document 1. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Combustion apparatus 6 Combustion part 7 Vaporization part 30b Rotating shaft 50, 80 Rotating members 90, 91, 92 Rotating members 93, 94, 95 Rotating members 96, 97 Rotating members 100, 110, 120, 130 Rotating members 51, 81a, 101 Disc body 52, 81b, 102 Stirring blade 55a Concavity and convexity (convex portion)
81f Concavities and convexities (openings, concavities)
82, 83, 84, 85, 86, 122, 134 Auxiliary member 82b Concavity and convexity (opening, concave portion)
83b Concavity and convexity (notch, concave)
83c Concavity and convexity (cut and raised part, convex part)
85b Unevenness (opening, recess)
85c Concavity and convexity (peripheral wall, convex part)
86b Concavity and convexity (cut and raised part, convex part)
86c Concavities and convexities (notches, recesses)
87 Auxiliary member 90b Unevenness (concave)
91a Concavity and convexity (concave part)
92b Concavity and convexity (concave part)
93a Concavity and convexity (annular convex part)
94a Concavity and convexity (convex part)
95a Concavity and convexity (circular concavity)
104 Concavity and convexity (cut and raised part, convex part)
107 Concavities and convexities (openings, convex portions)
124 Concavity and convexity (cut and raised part, convex part)
132 Concavities and convexities (openings, concavities)
136 gap

Claims (3)

The liquid fuel is vaporized has a vaporizer unit for generating a fuel gas, a combustion section for feeding and burning the mixed fuel gas of a fuel gas or air generated,
In the combustion device with the flame hole facing down ,
The vaporizing section is closed at the bottom and opened at the top , and the rotating member is rotated inside to disperse the liquid fuel, the scattered fuel is vaporized and stirred, and the rotating member rotates in the vertical direction. A stirring blade is provided on the outer periphery of the disc body that rotates integrally with the shaft, and the rotation shaft is fixed at the center of the disc body,
The rotating member has a plurality of openings whose inner periphery protrudes toward the side where the liquid fuel is dropped along the vicinity of the dropping portion or the vicinity of the outer peripheral edge on the surface of the disk body to which the liquid fuel is dropped during rotation. A combustion apparatus characterized by being provided on a disk . It said rotary member is composed of the disk-shaped auxiliary member disk body,
2. The combustion apparatus according to claim 1, wherein at least one of an opening, a cutout, a cut-up, and a step press is provided in at least one of the auxiliary member and the disk body. The rotating member is composed of a disk-shaped auxiliary member and the disk body,
Disk-shaped auxiliary member having substantially the same outer diameter as the disc body is fixed at a direct or gap on the bottom side of the disk body,
2. The combustion apparatus according to claim 1, wherein at least one of a plurality of cuts and raises along an outer peripheral edge of the auxiliary member or a plurality of openings arranged in the disk body is provided.

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