JP7066521B2 - Combustion device - Google Patents

Description

The present invention relates to a combustion device.

Conventionally, a combustion appliance including a burner unit having a plurality of combustion burners, a burner case main body accommodating the burner unit, and a front plate to which an electrode for ignition is attached is known (see, for example, Patent Document 1). ). In the combustion appliance of Patent Document 1, the burner unit is inserted into the burner case main body, and the front plate is fixed to the burner case main body by using screws. Since the combustion appliance of Patent Document 1 includes a burner case main body, a burner unit, and a front plate, these relative positional deviations occur due to manufacturing tolerances of screw insertion holes and the like. Therefore, in the combustion appliance disclosed in Patent Document 1, the burner unit and the front plate are positioned by fitting a screw into a hole formed in the burner unit.

Japanese Unexamined Patent Publication No. 8-20736

However, in the combustion appliance disclosed in Patent Document 1, the electrode unit including the igniter electrode and the frame rod electrode is detachably attached to the front plate by a screw. When the electrode unit is attached to the front plate by a screw, the inner diameter dimension of the screw insertion hole formed in the electrode unit is larger than the outer diameter dimension of the screw in order to absorb the manufacturing tolerance. Therefore, the positions of the tips of the igniter electrode and the frame rod electrode with respect to the front plate with respect to the combustion burner may be displaced by the difference between the inner diameter dimension of the insertion hole and the outer diameter dimension of the screw. Therefore, even when the burner unit and the front plate are accurately positioned, the tips of the igniter electrode and the frame rod electrode cannot be accurately positioned with respect to the combustion burner.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a combustion device capable of accurately positioning an electrode for ignition or flame detection of a combustion burner with respect to a combustion burner. do.

According to the present invention, the subject is a burner unit having a plurality of combustion burners, a burner case accommodating the burner unit, and a plate shape attached to the front surface of the burner case and forming a combustion chamber together with the burner case. It includes a member, an electrode for ignition or flame detection of the combustion burner, an insulating porcelain member that holds the electrode from the outer peripheral side, and a mounting member for attaching the porcelain member to the plate-shaped member. The plate-shaped member is formed flat and has a mounting surface on which the mounting member is mounted, and an insertion hole arranged on the combustion chamber side of the mounting surface and into which the electrode and the porcelain member are inserted. The porcelain member has a bottom surface on which the surface is formed and an inclined surface connecting the mounting surface and the bottom surface, and the porcelain member is formed in a substantially tubular shape extending along an axis and is inserted into the insertion hole. The mounting member has a portion having a portion having an outer diameter with respect to the axis line larger than the inner diameter of the insertion hole and a protruding portion formed in a shape corresponding to the inclined surface, and the mounting member has at least the protruding portion of the inclined surface. It is solved by a combustion apparatus characterized in that it is attached to the plate-shaped member so as to maintain a state of being in contact with two points.

According to the combustion device according to the present invention, the electrode and the insulator member are inserted into the insertion holes formed in the bottom surface of the plate-shaped member, and the mounting member is mounted on the mounting surface of the plate-shaped member. Since the protruding portion of the insulator member is larger than the inner diameter of the insertion hole and is formed in a shape corresponding to the inclined surface of the plate-shaped member, the protruding portion of the insulator member is abutted against the inclined surface without passing through the insertion hole. It becomes a state. Since the protrusion is in contact with at least two points on the inclined surface by the mounting member, the movement of the insulator member in the direction connecting the two points is restricted, and the state in which the electrode is positioned with respect to the plate-shaped member is maintained. To.
As described above, according to the combustion apparatus according to the present invention, the electrode for ignition or flame detection of the combustion burner can be accurately positioned with respect to the combustion burner.

In the combustion apparatus according to the present invention, preferably, the protrusion has a substantially square shape orthogonal to the axis, and the inclined surface has a pair of first inclined portions formed so as to extend in the same direction. The attachment member is characterized in that it is attached to the plate-shaped member so as to maintain a state in which a pair of sides of the protrusion extending in parallel across the axis are in contact with the pair of first inclined portions. And.
According to the combustion device of this configuration, the mounting member brings the pair of sides of the protrusions extending in parallel into contact with the pair of first inclined portions extending in parallel. Therefore, the movement of the insulator member in the direction orthogonal to the direction in which the first inclined portion extends is restricted, and the state in which the electrodes are positioned is maintained.

In the combustion apparatus according to the present invention, preferably, the inclined surface has a second inclined portion formed so as to extend in a direction orthogonal to the first inclined portion, and the mounting member is the said portion of the protruding portion. It is characterized in that it is attached to the plate-shaped member so as to maintain a state in which another side different from the pair of sides is in contact with the second inclined portion.
According to the combustion device of this configuration, the mounting member is in contact with the second inclined portion formed so that the other side of the protruding portion extends in the direction orthogonal to the first inclined portion. Therefore, the movement of the insulator member in the direction in which the first inclined portion extends and in the direction toward the second inclined portion is restricted, and the state in which the electrode is positioned is maintained.

The combustion device according to the present invention preferably includes a sealing member for sealing a gap between the insertion hole and the tip portion inserted into the insertion hole, and the mounting member is attached to the protruding portion. It is characterized in that it is attached to the plate-shaped member with the sealing member sandwiched between them.
According to the combustion device of this configuration, the gap between the insertion hole of the plate-shaped member and the tip of the insulator member is sealed by the sealing member, so that the leakage of the combustion gas from the combustion chamber to the outside is surely prevented. be able to.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a combustion device capable of accurately positioning an electrode for ignition or flame detection of a combustion burner with respect to the combustion burner.

It is a perspective view which shows the combustion apparatus which concerns on one Embodiment of this invention. It is an exploded perspective view which shows the member attached to the front plate of a combustion chamber. It is a top view which shows the mounting part of the electrode of the combustion chamber front plate shown in FIG. It is a figure which shows the state which attached the electrode to the front plate of the combustion chamber shown in FIG. FIG. 3 is a cross-sectional view taken along the line I-I of the front plate of the combustion chamber shown in FIG. FIG. 4 is a cross-sectional view taken along the line II-II of the combustion device shown in FIG. FIG. 3 is a cross-sectional view taken along the line III-III of the combustion device shown in FIG. FIG. 4 is a cross-sectional view taken along the line IV-IV of the combustion device shown in FIG. It is a partially enlarged view of the combustion apparatus shown in FIG. It is a partially enlarged view which shows the state when the insulator member is attached to the front plate of a combustion chamber. It is a top view which shows the electrode mounting part of a combustion apparatus. It is a rear view which shows the electrode mounting part of a combustion apparatus.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. Since the embodiments described below are suitable specific examples of the present invention, various technically preferable limitations are added, but the scope of the present invention is particularly limited to the present invention in the following description. Unless otherwise stated, the present invention is not limited to these aspects. Further, in each drawing, the same components are designated by the same reference numerals, and detailed description thereof will be omitted as appropriate.

Hereinafter, an embodiment of the combustion device 100 according to the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing a combustion device 100 according to the present embodiment. FIG. 2 is an exploded perspective view showing a member attached to the combustion chamber front plate 30 shown in FIG. FIG. 3 is a plan view showing a mounting portion of the electrodes (sparker electrode 40 and frame rod electrode 60) of the combustion chamber front plate 30 shown in FIG. 2.
The combustion device 100 of the present embodiment is, for example, a water heater. The combustion device 100 supplies the fuel gas supplied from the gas supply source (not shown) to the combustion burner 11 and burns it in the combustion chamber C, by means of a heat exchanger (not shown) arranged above the combustion chamber C. Heat exchange is performed between the high-temperature combustion gas generated in the combustion chamber C and water.

As shown in FIGS. 1 and 2, the combustion device 100 according to the present embodiment includes a burner unit 10 having a plurality of combustion burners 11, a burner case 20 accommodating the burner units 10, and a combustion chamber front plate (plate shape). A member) 30, a sparker electrode 40, a burner member 50, a frame rod electrode 60, a burner member 70, a holding plate (mounting member) 80, and a packing (sealing member) 90.

The combustion chamber front plate 30 is a member formed in a plate shape from a metal material, and forms the combustion chamber C together with the burner case 20. The combustion chamber front plate 30 is attached to the front surface of the burner case 20 by a plurality of fastening screws (not shown). The combustion chamber front plate 30 is formed with an insertion hole 32a for inserting the insulator member 50, an insertion hole 32b for inserting the insulator member 70, and fastening holes 31a and 31b for fastening the fastening bolt B. There is. As shown in FIG. 3, the insertion hole 32a is a substantially D-shaped hole formed so that one end side in the horizontal direction is substantially square with respect to a circle having a diameter D1. The insertion hole 32b has a circular shape with a diameter of D2.

The sparker electrode 40 is an electrode for ignition of the combustion burner 11, and spark discharge is performed to the combustion burner 11 by applying a high voltage generated by a high voltage generator (not shown). The sparker electrode 40 is formed in a rod shape by a heat-resistant alloy (for example, Esuit).
The insulator member 50 is a member formed of an insulating material (for example, porcelain, glass, synthetic resin, etc.) by holding a region excluding both ends of the rod-shaped sparker electrode 40 from the outer peripheral side.

The frame rod electrode 60 is an electrode for detecting the flame of the combustion burner 11, and the tip thereof is inserted into the flame generated by the combustion burner 11 burning the fuel gas. The frame rod electrode 60 is connected to an AC power source (not shown), and a current flows when a flame is generated in the combustion burner 11, and a current flows when a flame is not generated in the combustion burner 11. Not flowing. By shutting off the supply of fuel gas to the combustion burner 11 by a solenoid valve (not shown) when no current flows through the frame rod electrode 60, it is possible to prevent extinguishing.
The insulator member 70 is a member formed of an insulating material (for example, porcelain, glass, synthetic resin, etc.) by holding a region excluding both ends of the rod-shaped frame rod electrode 60 from the outer peripheral side.

The presser plate 80 is formed in a plate shape from a metal material, and is a member for attaching the insulator member 50 and the insulator member 70 to the combustion chamber front plate 30. The presser plate 80 is formed with an insertion hole 81 into which the insulator member 50 is inserted, an insertion hole 82 into which the insulator member 70 is inserted, and insertion holes 83 and 84 into which the fastening bolt B is inserted.

The packing 90 is inserted into the gap between the insertion hole 32a formed in the combustion chamber front plate 30 and the porcelain member 50 inserted into the insertion hole 32a, and the insertion hole 32b and the insertion hole 32b formed in the combustion chamber front plate 30. It is a member for sealing the gap with the porcelain member 70 to be formed. The packing 90 is made of a non-combustible material such as glass wool or rock wool. The packing 90 is formed with an insertion hole 91 into which the insulator member 50 is inserted, an insertion hole 92 into which the insulator member 70 is inserted, and an insertion hole 93 into which the fastening bolt B is inserted.

Next, a method of attaching the sparker electrode 40 and the insulator member 50, and the frame rod electrode 60 and the insulator member 70 to the combustion chamber front plate 30 will be described.
As shown in FIG. 2, the insertion hole 32a formed in the combustion chamber front plate 30 is a hole centered on the axis X1, and the tip of the sparker electrode 40 and the tip of the insulator member 50 are inserted into the insertion hole 32a. .. Further, the insertion hole 32b formed in the combustion chamber front plate 30 is a hole centered on the axis X2, and the tip of the frame rod electrode 60 and the tip of the insulator member 70 are inserted into the insertion hole 32b. When the tip of the sparker electrode 40 and the tip of the insulator member 50 are inserted into the insertion hole 32a, and the tip of the frame rod electrode 60 and the tip of the insulator member 70 are inserted into the insertion hole 32b, the state shown in FIG. 4 is obtained. FIG. 4 is a diagram showing a state in which an electrode is attached to the combustion chamber front plate 30 shown in FIG.

After the state shown in FIG. 4 is reached, the insertion hole 91 of the packing 90 is inserted into the base end of the insulator member 50, and the insertion hole 92 of the packing 90 is inserted into the base end of the insulator member 70. Further, the insertion hole 81 of the presser plate 80 is inserted into the base end of the insulator member 50, and the insertion hole 82 of the presser plate 80 is inserted into the base end of the insulator member 70. After that, the fastening bolt B is inserted into the insertion hole 83 of the holding plate 80 and the insertion hole 93 of the packing 90, and the fastening bolt B is fastened to the fastening hole 31a of the combustion chamber front plate 30. Further, the fastening bolt B is inserted into the insertion hole 84 of the holding plate 80, and the fastening bolt B is fastened to the fastening hole 31b of the combustion chamber front plate 30. As described above, the sparker electrode 40 and the insulator member 50 are attached to the combustion chamber front plate 30, and the frame rod electrode 60 and the insulator member 70 are attached.

Next, the structure for positioning the insulator member 50 and the insulator member 70 with respect to the combustion chamber front plate 30 will be described with reference to the drawings.
FIG. 5 is a cross-sectional view taken along the line II of the combustion chamber front plate 30 shown in FIG. FIG. 6 is a cross-sectional view taken along the line II-II of the combustion device 100 shown in FIG. FIG. 7 is a cross-sectional view taken along the line III-III of the combustion device 100 shown in FIG. FIG. 8 is a cross-sectional view taken along the line IV-IV of the combustion device 100 shown in FIG.

As shown in FIGS. 3 and 5, the combustion chamber front plate 30 has a flat mounting surface 31, a bottom surface 32 arranged on the combustion chamber C side of the mounting surface 31, and a mounting surface 31 and a bottom surface. It has an inclined surface 33 connecting with 32. The combustion chamber front plate 30 is a member in which a mounting surface 31, a bottom surface 32, and an inclined surface 33 are integrally formed by press working.

The mounting surface 31 is a surface on which the holding plate 80 is mounted via the fastening bolt B, and a fastening hole 31a and a fastening hole 31b to which the fastening bolt B is fastened are formed. The bottom surface 32 is formed with an insertion hole 32a into which the sparker electrode 40 and the insulator member 50 are inserted, and an insertion hole 32b into which the frame rod electrode 60 and the insulator member 70 are inserted.

As shown in FIG. 3, the inclined surface 33 extends in a vertical direction orthogonal to a pair of first inclined portions 33a and 33b formed so as to extend in the horizontal direction and a pair of first inclined portions 33a and 33b. It has a pair of second inclined portions 33c and 33d to be formed. As shown in FIG. 4, the inclined surface 33 is a surface having a constant gradient inclined by an inclination angle θ with respect to the axis X1. Here, the inclination angle θ is, for example, an angle in the range of 40 ° or more and 50 ° or less. The inclined surface 33 is inclined toward the center of the insertion hole 32a so that the distance from the mounting surface 31 toward the bottom surface 32 gradually decreases.

Although FIG. 5 shows a cross section of the center position of the insertion hole 32a shown in FIG. 3, the cross section of the center position of the insertion hole 32b shown in FIG. 3 is the same as that of FIG. In FIG. 5, the reference numerals in the case of the cross section at the center position of the insertion hole 32b are shown in parentheses.

Here, a structure for positioning the sparker electrode 40 and the insulator member 50 with respect to the combustion chamber front plate 30 will be described.
As shown in FIG. 6, the insulator member 50 has a tip portion 51, a protruding portion 52, and a base end portion 53. The tip portion 51 is a portion formed in a substantially cylindrical shape extending along the axis X1 and inserted into the insertion hole 32a, and the outer diameter with respect to the axis X1 is D12. The protrusion 52 has an outer diameter of D11 with respect to the axis X1. The outer diameter D12 of the tip portion 51 is smaller than the inner diameter D1 of the insertion hole 32a, and the outer diameter D11 of the protruding portion 52 is larger than the inner diameter D1 of the insertion hole 32a.

The cross-sectional shape of the surface of the tip portion 51 orthogonal to the axis X1 is a substantially D-shaped shape in which the insertion hole 32a is slightly reduced. Since the shape of the insertion hole 32a and the cross-sectional shape of the tip portion 51 are similar shapes that are not circular, the porcelain member 50 does not rotate around the axis X1 when the tip portion 51 is inserted into the insertion hole 32a.

As shown in FIG. 4, the protrusion 52 of the insulator member 50 has a substantially square shape orthogonal to the axis X1. The pair of horizontally extending sides 52a and 52b of the protrusion 52 extend in parallel with the axis X1 interposed therebetween, and horizontally extend so as to correspond to the pair of first inclined portions 33a and 33b of the combustion chamber front plate 30. It is formed in an elongated shape. The side 52c of the protrusion 52 is formed in a shape extending in the vertical direction so as to correspond to the second inclined portion 33c of the combustion chamber front plate 30.

As shown in FIG. 6, in the holding plate 80, the pair of sides 52a and 52b of the protruding portion 52 are in contact with the first inclined portions 33a and 33b, respectively, and the sparker electrode 40 is in the direction perpendicular to the combustion chamber front plate 30. It is attached to the combustion chamber front plate 30 so as to maintain the positioned state. Here, the holding plate 80 is attached to the combustion chamber front plate 30 with the packing 90 sandwiched between the pressing plate 80 and the protruding portion 52. Therefore, the packing 90 seals the gap between the insertion hole 32a and the tip end portion 51 of the insulator member 50 inserted into the insertion hole 32a.

Further, as shown in FIG. 8, in the holding plate 80, the side 52c of the protruding portion 52 is in contact with the second inclined portion 33c, and the sparker electrode 40 is positioned horizontally with respect to the combustion chamber front plate 30. Is attached to the combustion chamber front plate 30 so as to hold.

Next, a structure for positioning the frame rod electrode 60 and the insulator member 70 with respect to the combustion chamber front plate 30 will be described.
As shown in FIG. 7, the insulator member 70 has a tip portion 71, a protrusion portion 72, and a base end portion 73. The tip portion 71 is a portion formed in a substantially cylindrical shape extending along the axis X2 and inserted into the insertion hole 32b, and the outer diameter with respect to the axis X2 is D22. The protrusion 72 has an outer diameter of D21 with respect to the axis X2. The outer diameter D22 of the tip portion 71 is smaller than the inner diameter D2 of the insertion hole 32b, and the outer diameter D21 of the protruding portion 72 is larger than the inner diameter D2 of the insertion hole 32b.

As shown in FIG. 4, the protruding portion 72 of the porcelain member 70 has a substantially square shape orthogonal to the axis X2, and the pair of sides 72a and 72b extending in the horizontal direction of the protruding portion 72 sandwich the axis X2. It extends in parallel and is formed in a shape extending in the horizontal direction so as to correspond to the pair of first inclined portions 33a and 33b of the combustion chamber front plate 30. The side 72c of the protrusion 72 is formed in a shape extending in the vertical direction so as to correspond to the second inclined portion 33d of the combustion chamber front plate 30.

As shown in FIG. 7, in the holding plate 80, the pair of sides 72a and 72b of the protruding portion 72 are in contact with the first inclined portions 33a and 33b, respectively, and the frame rod electrode 60 is positioned with respect to the combustion chamber front plate 30. It is attached to the combustion chamber front plate 30 so as to maintain the state. Here, the holding plate 80 is attached to the combustion chamber front plate 30 with the packing 90 sandwiched between the pressing plate 80 and the protruding portion 72. Therefore, the packing 90 seals the gap between the insertion hole 32b and the tip end portion 71 of the insulator member 70 to be inserted into the insertion hole 32b.

Further, as shown in FIG. 8, in the holding plate 80, the side 72c of the protruding portion 72 is in contact with the second inclined portion 33d, and the frame rod electrode 60 is positioned horizontally with respect to the combustion chamber front plate 30. Is attached to the combustion chamber front plate 30 so as to hold.

Next, with reference to FIGS. 9 and 10, the contact between the inclined surface 33 and the insulator members 50, 70 when positioning the insulator member 50 and the insulator member 70 with respect to the combustion chamber front plate 30 will be described.
FIG. 9 is a partially enlarged view of the combustion device 100 shown in FIG. 6, showing a state in which the insulator member 50 is positioned with respect to the combustion chamber front plate 30. FIG. 10 is a partially enlarged view showing a state when the insulator member 50 is attached to the combustion chamber front plate 30, and the state shown in FIG. 9 is obtained by attaching the holding plate 80 to the combustion chamber front plate 30.

In FIGS. 9 and 10, the presser plate 80 and the packing 90 shown in FIG. 6 are not shown. Further, although FIGS. 9 and 10 show the insulator member 50, the insulator member 70 is the same as that of FIGS. 9 and 10. In FIGS. 9 and 10, the reference numerals for the insulator member 70 are shown in parentheses. Further, also in the following description, the description in the case of the insulator member 70 is shown in parentheses.

As shown in FIG. 9, when the porcelain member 50 (the porcelain member 70) is positioned with respect to the combustion chamber front plate 30, the side 52a (side 72a) of the protrusion 52 (protrusion 72) and the first inclination The portion 33a comes into contact with the contact point P1 (contact point P3), and the side 52b (side 72b) of the protruding portion 52 (protruding portion 72) and the first inclined portion 33b come into contact with each other at the contact point P2 (contact point P4). .. In the positioned state shown in FIG. 9, the tip portion 51 (tip portion 71) of the insulator member 50 (insulator member 70) and the insertion hole 32a (insertion hole 32b) of the combustion chamber front plate 30 are held in a non-contact state. Insulator. Since the insulator member 50 (insulator member 70) is arranged so as to sandwich the axis X1 (axis line X2), the insulator member 50 (insulator member 70) is positioned so as not to move in the vertical direction.

In a state where the porcelain member 50 (the porcelain member 70) is not positioned with respect to the combustion chamber front plate 30, for example, as shown in FIG. While the 1 inclined portion 33b is in contact with the side 52a (side 72a) of the protruding portion 52 (protruding portion 72), the first inclined portion 33a is not in contact with each other. Here, when the holding plate 80 is attached to the front plate 30 of the combustion chamber and the protruding portion 52 (protruding portion 72) is pressed toward the combustion chamber C side via the packing 90, the porcelain member 50 (the porcelain member 70) extends. A force acts in the direction in which the axis X1 (axis X2) coincides with the horizontal direction.

Here, the portion of the protruding portion 52 (protruding portion 72) in contact with the first inclined portion 33b of the side 52b (side 72b) has a curved surface shape with a radius of curvature R1 (radius of curvature R2). Further, for example, a glaze having high surface smoothness is applied to the surface of the protruding portion 52 (protruding portion 72). Since the frictional force generated in the portion of the protruding portion 52 (protruding portion 72) in contact with the first inclined portion 33b of the side 52b (side 72b) is small, the holding plate 80 is attached to the combustion chamber front plate 30. The position where the side 52b (side 72b) of the protrusion 52 (the protrusion 72) comes into contact with the first inclined portion 33b gradually approaches the contact point P2 (contact point P4) shown in FIG. 9, and finally the state shown in FIG. Will be.

Next, the arrangement of the electrodes (sparker electrode 40 and frame rod electrode 60) with respect to the combustion burner 11 of the burner unit 10 will be described.
FIG. 11 is a plan view showing an electrode mounting portion of the combustion device 100. FIG. 12 is a rear view showing an electrode mounting portion of the combustion device 100.

As shown in FIG. 11, the position of the tip portion 41 of the sparker electrode 40 in the Y direction of the axis extending in the horizontal direction is Y1, and the position of the tip portion 61 of the frame rod electrode 60 is Y2. In order for the sparker electrode 40 to perform an appropriate spark discharge to the combustion burner 11, it is necessary to arrange the position Y1 at an appropriate position in the axis Y direction with respect to the combustion burner 11. Further, in order to arrange the frame rod electrode 60 at an appropriate position in the flame generated by the combustion burner 11, it is necessary to arrange the position Y2 at an appropriate position in the axis Y direction with respect to the combustion burner 11.

In the present embodiment, the sides 52a, 52b, 52c of the protrusion 52 of the insulator member 50 and the sides 72a, 72b, 72c of the protrusion 72 of the insulator member 70 are formed by the holding plate 80 so that the inclined surfaces 33 of the combustion chamber front plate 30 are formed. The state of contact with the insulator is maintained. Therefore, both the position Y1 of the tip portion 41 of the sparker electrode 40 and the position Y2 of the tip portion 61 of the frame rod electrode 60 are arranged at appropriate positions in the axis Y direction with respect to the combustion burner 11.

As shown in FIG. 12, the position of the tip portion 41 of the sparker electrode 40 in the Z direction of the axis extending in the vertical direction is Z1, and the position of the tip portion 61 of the frame rod electrode 60 is Z2. In order for the sparker electrode 40 to perform an appropriate spark discharge to the combustion burner 11, it is necessary to arrange the position Z1 at an appropriate position in the axis Z direction with respect to the position Z0 of the flame port of the combustion burner 11. Further, in order to arrange the frame rod electrode 60 at an appropriate position in the flame generated by the combustion burner 11, the position Z2 is set at an appropriate position in the axis Z direction with respect to the position Z0 of the flame port of the combustion burner 11. Need to be placed.

In the present embodiment, the sides 52a, 52b, 52c of the protrusion 52 of the insulator member 50 and the sides 72a, 72b, 72c of the protrusion 72 of the insulator member 70 are formed by the holding plate 80 so that the inclined surfaces 33 of the combustion chamber front plate 30 are formed. The state of contact with the insulator is maintained. Therefore, both the position Z1 of the tip portion 41 of the sparker electrode 40 and the position Z2 of the tip portion 61 of the frame rod electrode 60 are located at appropriate positions in the axis Z direction with respect to the position Z0 of the flame port of the combustion burner 11. Be placed.

The operation and effect of the combustion device 100 of the present embodiment described above will be described.
According to the combustion device 100 of the present embodiment, the sparker electrode 40 and the porcelain member 50 are inserted into the insertion holes 32a formed in the bottom surface 32 of the combustion chamber front plate 30, and the holding plate 80 is attached to the combustion chamber front plate 30. Attached to surface 31. The protruding portion 52 of the insulator member 50 is larger than the inner diameter D1 of the insertion hole 32a. Further, the protruding portion 52 is formed in a shape in which the sides 52a and 52b extend in the horizontal direction and the sides 52c extend in the vertical direction so as to correspond to the inclined surface 33 of the combustion chamber front plate 30. Therefore, the protruding portion 52 does not pass through the insertion hole 32a and is in a state of being abutted against the pair of first inclined portions 33a and 33b and the second inclined portion 33c of the inclined surface 33.

The protrusion 52 is in a state where the pair of sides 52a and 52b extending in parallel are in contact with the two points of the pair of first inclined portions 33a and 33b extending in parallel by the pressing plate 80. Therefore, the movement of the insulator member 50 in the vertical direction is restricted, and the sparker electrode 40 is positioned in the vertical direction. Further, the protruding portion 52 is in contact with the second inclined portion 33c by the pressing plate 80. Here, the protruding portion 52 is not in contact with the bottom surface 32 of the combustion chamber front plate 30. Therefore, the movement of the insulator member 50 in the horizontal direction and in the direction toward the second inclined portion 33c is restricted, and the sparker electrode 40 is positioned in the horizontal direction.

Further, according to the combustion apparatus 100 of the present embodiment, the frame rod electrode 60 and the porcelain member 70 are inserted into the insertion holes 32b formed in the bottom surface 32 of the combustion chamber front plate 30, and the holding plate 80 is the combustion chamber front plate 30. It is mounted on the mounting surface 31 of. The protrusion 72 of the insulator member 70 is larger than the inner diameter D2 of the insertion hole 32b. Further, the protruding portion 72 is formed in a shape in which the sides 72a and 72b extend in the horizontal direction and the sides 72c extend in the vertical direction so as to correspond to the inclined surface 33 of the combustion chamber front plate 30. Therefore, the protruding portion 72 does not pass through the insertion hole 32b and is in a state of being abutted against the pair of first inclined portions 33a and 33b and the second inclined portion 33d of the inclined surface 33.

The protrusion 72 is in a state where the pair of parallel extending sides 72a and 72b are in contact with the two points of the pair of first inclined portions 33a and 33b extending in parallel by the pressing plate 80. Therefore, the movement of the insulator member 70 in the vertical direction is restricted, and the frame rod electrode 60 is positioned in the vertical direction. Further, the protruding portion 72 is in contact with the second inclined portion 33d by the pressing plate 80. Here, the protruding portion 72 is not in contact with the bottom surface 32 of the combustion chamber front plate 30. Therefore, the movement of the insulator member 70 in the horizontal direction and in the direction toward the second inclined portion 33d is restricted, and the frame rod electrode 60 is positioned in the horizontal direction.

Further, according to the combustion device 100 of the present embodiment, there is a gap between the insertion hole 32a of the combustion chamber front plate 30 and the tip portion 51 of the porcelain member 50, and the insertion hole 32b of the combustion chamber front plate 30 and the tip portion of the porcelain member 70. Since the gap with the 71 is sealed by the packing 90, it is possible to reliably prevent the leakage of the combustion gas from the combustion chamber C to the outside.

[Other embodiments]
In the above description, the protruding portion 52 has a substantially square cross-sectional shape orthogonal to the axis X1, and the inclined surface 33 has a pair of first inclined portions 33a and 33b extending in parallel in the horizontal direction and a pair extending in parallel in the vertical direction. Although it is assumed that the second inclined portions 33c and 33d of the above are provided, other embodiments may be used.
For example, the cross-sectional shape orthogonal to the axis X1 of the protrusion 52 may be a substantially circular shape, and the cross-sectional shape orthogonal to the axis X1 of the inclined surface 33 may be a substantially circular shape. In this case, the holding plate 80 is attached to the combustion chamber front plate 30 so as to keep the protruding portion 52 in contact with the inclined surface 33 over the entire circumference in the circumferential direction around the axis X1.

Similarly, in the above description, the protruding portion 72 has a substantially square cross-sectional shape orthogonal to the axis X2, and the inclined surface 33 is parallel to the pair of first inclined portions 33a and 33b extending in parallel in the horizontal direction in the vertical direction. Although it is assumed that it has a pair of second inclined portions 33c and 33d extending to, other embodiments may be used.
For example, the cross-sectional shape orthogonal to the axis X2 of the protrusion 72 may be a substantially circular shape, and the cross-sectional shape orthogonal to the axis X2 of the inclined surface 33 may be a substantially circular shape. In this case, the shape of the inclined surface 33 is a substantially conical shape in which the inner diameter with respect to the axis X1 gradually decreases from the mounting surface 31 toward the bottom surface 32. Further, the holding plate 80 is attached to the combustion chamber front plate 30 so as to keep the protruding portion 72 in contact with the inclined surface 33 over the entire circumference in the circumferential direction around the axis X2.

As described above, as another embodiment, the shapes of the protrusions 52, 72 and the inclined surface 33 are appropriately shaped so that the protrusions 52, 72 and the inclined surface 33 are in contact with each other at a plurality of points of two or more. It is possible to change. In this case, the holding plate 80 is attached to the combustion chamber front plate 30 so as to keep the protruding portions 52 and 72 in contact with each other at two or more points on the inclined surface 33.

The embodiment of the present invention has been described above. However, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of claims. The configuration of the above embodiment may be partially omitted or may be arbitrarily combined so as to be different from the above.

10 ... Burner unit, 11 ... Combustion burner, 20 ... Burner case, 30 ... Combustion chamber front plate (plate-shaped member), 31 ... Mounting surface, 31a, 31b ... Fastening holes , 32 ... bottom surface, 32a, 32b ... insertion hole, 33 ... inclined surface, 33a, 33b ... first inclined portion, 33c, 33d ... second inclined portion, 40 ... Parker electrode, 41 ... tip, 50 ... porcelain member, 51 ... tip, 52 ... protrusion, 52a, 52b, 52c ... side, 53 ... base end, 60・ ・ ・ Frame rod electrode, 61 ・ ・ ・ Tip part, 70 ・ ・ ・ Burner member, 71 ・ ・ ・ Tip part, 72 ・ ・ ・ Protruding part, 72a, 72b, 72c ・ ・ ・ Side, 73 ・ ・ ・ Base End, 80 ... Presser plate (mounting member), 81-84 ... Insert hole, 90 ... Packing (sealing member), 91-93 ... Insert hole

Claims (4)

A burner unit with multiple combustion burners and
A burner case for accommodating the burner unit and
A plate-shaped member attached to the front surface of the burner case and forming a combustion chamber together with the burner case,
With the electrode for ignition or flame detection of the combustion burner,
An insulating insulator member that holds the electrodes from the outer peripheral side, and
A mounting member for mounting the insulator member to the plate-shaped member is provided.
The plate-shaped member is
A mounting surface that is formed flat and to which the mounting member is mounted,
A bottom surface that is arranged on the combustion chamber side of the mounting surface and has an insertion hole into which the electrode and the insulator member are inserted.
It has an inclined surface that connects the mounting surface and the bottom surface, and has.
The insulator member is
A tip portion that is formed in a substantially cylindrical shape extending along an axis and is inserted into the insertion hole,
It has a protrusion whose outer diameter with respect to the axis is larger than the inner diameter of the insertion hole and is formed in a shape corresponding to the inclined surface.
The combustion device is characterized in that the mounting member is mounted on the plate-shaped member so as to maintain a state in which the protruding portion is in contact with at least two points on the inclined surface. The protrusion has a substantially square shape orthogonal to the axis.
The inclined surface has a pair of first inclined portions formed so as to extend in the same direction.
The claim is characterized in that the mounting member is mounted on the plate-shaped member so as to maintain a state in which a pair of sides of the protruding portions extending in parallel across the axis are in contact with the pair of first inclined portions. Item 1. The combustion apparatus according to Item 1. The inclined surface has a second inclined portion formed so as to extend in a direction orthogonal to the first inclined portion.
The second aspect of the present invention is characterized in that the mounting member is mounted on the plate-shaped member so as to maintain a state in which a side different from the pair of sides of the protruding portion is in contact with the second inclined portion. The combustor described. A sealing member for sealing a gap between the insertion hole and the tip portion inserted into the insertion hole is provided.
The combustion device according to any one of claims 1 to 3, wherein the mounting member is mounted on the plate-shaped member with the sealing member sandwiched between the mounting member and the protruding portion. ..

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