JP2019203626A - Combustion device - Google Patents

Abstract

To accurately position an electrode for ignition or flame detection of a combustion burner, to the combustion burner.SOLUTION: A combustion device 100 includes a burner unit, a burner case, a combustion chamber front plate 30 forming a combustion chamber C with the burner case, a sparker electrode 40, an insulator member 50 holding the sparker electrode 40, and a pressing plate 80 for mounting the insulator member 50 on the combustion chamber front plate 30. The combustion chamber front plate 30 has a mounting surface 31, a bottom surface having an insertion hole 32a to which the sparker electrode 40 and the insulator member 50 are inserted, and first inclination portions 33a, 33b connecting the mounting surface 31 and the bottom surface. The insulator member 50 has a tip portion 51 inserted to the insertion hole 32a, and a projection portion 52 having an outer diameter D11 to an axis X1, larger than an inner diameter D1 of the insertion hole 32a. The pressing plate 80 is mounted on the combustion chamber front plate 30 to keep a state that the projection portion 52 is kept into contact with two points of the first inclination portions 33a, 33b.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a combustion apparatus.

  2. Description of the Related Art Conventionally, there is known a combustion appliance that includes a burner unit having a plurality of combustion burners, a burner case main body that accommodates the burner unit, and a front plate to which an ignition electrode is attached (see, for example, Patent Document 1). ). The combustion instrument of patent document 1 inserts a burner unit with respect to a burner case main body, and fixes a front board with respect to a burner case main body using a screw. Since the combustion appliance of Patent Document 1 includes a burner case main body, a burner unit, and a front plate, the relative displacement of these occurs due to manufacturing tolerances of screw insertion holes. Therefore, the combustion appliance disclosed in Patent Document 1 positions the burner unit and the front plate by inserting a screw into a hole formed in the burner unit.

Japanese Patent Laid-Open No. 8-200246

  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 screws. When the electrode unit is attached to the front plate with screws, the inner diameter of the screw insertion hole formed in the electrode unit is larger than the outer diameter of the screw in order to absorb manufacturing tolerances. Therefore, the positions of the tip of the igniter electrode and the frame rod electrode with respect to the front plate with respect to the combustion burner may be shifted by the difference between the inner diameter dimension of the insertion hole and the outer diameter dimension of the screw. Therefore, even if 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-described problems, and an object of the present invention is to provide a combustion apparatus capable of accurately positioning an electrode for ignition or flame detection of a combustion burner with respect to the combustion burner. To do.

  According to the present invention, the subject is a burner unit having a plurality of combustion burners, a burner case that houses the burner unit, and a plate shape that is attached to the front surface of the burner case and forms a combustion chamber together with the burner case. A member, an electrode for ignition or flame detection of the combustion burner, an insulating insulator member for holding the electrode from the outer peripheral side, and an attachment member for attaching the insulator member to the plate-like member The plate-like member is formed in a flat shape and has a mounting surface to which the mounting member is mounted, and an insertion hole in which the electrode and the insulator member are inserted while being disposed closer to the combustion chamber than the mounting surface. And an inclined surface connecting the mounting surface and the bottom surface, and the insulator member is formed in a substantially cylindrical shape extending along an axis. A distal end portion to be inserted into the insertion hole; and a protrusion having an outer diameter with respect to the axis larger than an inner diameter of the insertion hole and formed in a shape corresponding to the inclined surface. This is solved by a combustion apparatus characterized in that the portion is attached to the plate-like member so as to maintain a state where the portion is in contact with at least two points of the inclined surface.

According to the combustion apparatus according to the present invention, the electrode and the insulator member are inserted into the insertion hole formed in the bottom surface of the plate member, and the attachment member is attached to the attachment surface of the plate member. Since the protruding portion of the lever member is formed in a shape corresponding to the inclined surface of the plate-like member larger than the inner diameter of the insertion hole, the protruding portion of the lever member was abutted against the inclined surface without passing through the insertion hole. It becomes a state. Since the projecting portion is in contact with at least two points on the inclined surface by the mounting member, the movement of the lever member in the direction connecting the two points is restricted and the state where the electrode is positioned with respect to the plate-like member is maintained. The
As described above, according to the combustion apparatus of the present invention, it is possible to accurately position an electrode for ignition or flame detection of the combustion burner with respect to the combustion burner.

In the combustion apparatus according to the present invention, preferably, the protruding portion has a substantially quadrangular shape orthogonal to the axis, and the inclined surface includes a pair of first inclined portions formed to extend in the same direction. And the attachment member is attached to the plate-like member so as to maintain a state in which a pair of sides of the projecting portion extending in parallel across the axis is in contact with the pair of first inclined portions. And
According to the combustion apparatus of this configuration, the mounting member is in a state where the pair of sides of the projecting portion extending in parallel is in contact with the pair of first inclined portions extending in parallel. Therefore, the movement of the lever member in the direction orthogonal to the direction in which the first inclined portion extends is restricted, and the state where the electrode is 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 protrusion of the protruding portion. It is attached to the said plate-shaped member so that the other side different from a pair of side may hold | maintain the state which contacted the said 2nd inclination part.
According to the combustion device of this configuration, the attachment member comes into contact with the second inclined portion formed so that the other side of the protruding portion extends in a direction orthogonal to the first inclined portion. Therefore, the movement of the lever member in the direction in which the first inclined portion extends and the direction toward the second inclined portion is restricted, and the electrode is positioned.

The combustion apparatus 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 attachment member is connected to the protrusion. The sealing member is attached to the plate member with the sealing member interposed therebetween.
According to the combustion apparatus of this configuration, since the gap between the insertion hole of the plate-like member and the tip of the insulator member is sealed by the sealing member, the leakage of the combustion gas from the combustion chamber to the outside is surely prevented. be able to.

  ADVANTAGE OF THE INVENTION According to this invention, the combustion apparatus which can position correctly the electrode for ignition of a combustion burner or a flame detection with respect to a combustion burner can be provided.

It is a perspective view which shows the combustion apparatus which concerns on one Embodiment of this invention. It is a disassembled perspective view which shows the member attached to a combustion chamber front board. It is a top view which shows the attachment 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 combustion chamber front board shown in FIG. FIG. 4 is a cross-sectional view taken along the line II of the combustion chamber front plate shown in FIG. 3. It is II-II arrow sectional drawing of the combustion apparatus shown in FIG. FIG. 5 is a cross-sectional view taken along the line III-III of the combustion apparatus shown in FIG. 4. It is IV-IV arrow directional cross-sectional view of the combustion apparatus shown in FIG. It is the elements on larger scale of the combustion apparatus shown in FIG. It is the elements on larger scale which show the state at the time of attaching an insulator member to a combustion chamber front board. It is a top view which shows the electrode attachment part of a combustion apparatus. It is a rear view which shows the electrode attachment part of a combustion apparatus.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. The embodiments described below are preferable specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these embodiments. Moreover, in each drawing, the same code | symbol is attached | subjected to the same component and detailed description is abbreviate | omitted suitably.

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

  As shown in FIGS. 1 and 2, a combustion apparatus 100 according to this embodiment includes a burner unit 10 having a plurality of combustion burners 11, a burner case 20 that houses the burner units 10, and a combustion chamber front plate (plate-shaped). Member) 30, sparker electrode 40, lever member 50, frame rod electrode 60, lever member 70, pressing plate (mounting member) 80, and 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 lever member 50, an insertion hole 32b for inserting the lever member 70, and fastening holes 31a, 31b to which the fastening bolts B are fastened. Yes. 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 has a substantially quadrangular shape with respect to a circle having a diameter D1. The insertion hole 32b has a circular shape with a diameter D2.

The sparker electrode 40 is an electrode for igniting the combustion burner 11, and performs spark discharge on the combustion burner 11 when a high voltage generated by a high voltage generator (not shown) is applied. The sparker electrode 40 is formed in a rod shape from a heat-resistant alloy (for example, eswit).
The insulator member 50 is a member that is formed of an insulating material (for example, porcelain, glass, synthetic resin, etc.) while holding a region excluding both ends of the sparker electrode 40 formed in a rod shape from the outer peripheral side.

The flame rod electrode 60 is an electrode for detecting the flame of the combustion burner 11, and the tip is inserted into the flame generated when the combustion burner 11 burns fuel gas. The flame rod electrode 60 is connected to an AC power source (not shown). When flame is generated in the combustion burner 11, current flows, and when flame is not generated in the combustion burner 11, current flows. Not flowing. When the current does not flow through the flame rod electrode 60, the supply of the fuel gas to the combustion burner 11 is blocked by an electromagnetic valve (not shown), so that the extinction can be prevented.
The insulator member 70 is a member formed of an insulating material (for example, porcelain, glass, synthetic resin, etc.) that holds the region excluding both ends of the frame rod electrode 60 formed in a rod shape from the outer peripheral side.

  The presser plate 80 is a member that is formed in a plate shape from a metal material, and is used to attach the insulator member 50 and the insulator member 70 to the combustion chamber front plate 30. The holding plate 80 has an insertion hole 81 into which the lever member 50 is inserted, an insertion hole 82 into which the lever member 70 is inserted, and insertion holes 83 and 84 into which the fastening bolts B are inserted.

  The packing 90 is inserted into the gap between the insertion hole 32a formed in the combustion chamber front plate 30 and the insulator member 50 inserted into the insertion hole 32a, and the insertion hole 32b and insertion hole 32b formed in the combustion chamber front plate 30. It is a member for sealing the gap with the insulator member 70 to be performed. The packing 90 is made of, for example, a non-combustible material such as glass wool or rock wool. The packing 90 is formed with an insertion hole 91 into which the lever member 50 is inserted, an insertion hole 92 into which the lever 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, 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. . 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 lever member 50 are inserted into the insertion hole 32a and the tip of the frame rod electrode 60 and the tip of the lever member 70 are inserted into the insertion hole 32b, the state shown in FIG. FIG. 4 is a view showing a state in which electrodes are attached to the combustion chamber front plate 30 shown in FIG.

  After reaching the state shown in FIG. 4, the insertion hole 91 of the packing 90 is inserted into the base end of the lever member 50, and the insertion hole 92 of the packing 90 is inserted into the base end of the lever member 70. Further, the insertion hole 81 of the presser plate 80 is inserted into the base end of the lever member 50, and the insertion hole 82 of the presser plate 80 is inserted into the base end of the lever member 70. Thereafter, 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 31 a of the combustion chamber front plate 30. Further, the fastening bolt B is inserted into the insertion hole 84 of the presser plate 80, and the fastening bolt B is fastened to the fastening hole 31 b of the combustion chamber front plate 30. Thus, 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, a 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 of the combustion chamber front plate 30 shown in FIG. 6 is a cross-sectional view of the combustion apparatus 100 shown in FIG. FIG. 7 is a cross-sectional view of the combustion apparatus 100 shown in FIG. FIG. 8 is a cross-sectional view of the combustion device 100 shown in FIG.

  As shown in FIGS. 3 and 5, the combustion chamber front plate 30 includes a mounting surface 31 that is formed flat, a bottom surface 32 that is disposed closer to the combustion chamber C than the mounting surface 31, and the mounting surface 31 and the bottom surface. And an inclined surface 33 that couples the two. The combustion chamber front plate 30 is a member in which an attachment surface 31, a bottom surface 32, and an inclined surface 33 are integrally formed by pressing.

  The attachment surface 31 is a surface to which the presser plate 80 is attached 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 perpendicular to the pair of first inclined portions 33a and 33b and the pair of first inclined portions 33a and 33b formed to extend in the horizontal direction. It has a pair of 2nd inclination parts 33c and 33d formed. As shown in FIG. 4, the inclined surface 33 is a surface having a constant gradient inclined by the inclination angle θ with respect to the axis X1. Here, the inclination angle θ is, for example, an angle in a range of 40 ° to 50 °. The inclined surface 33 is inclined toward the center of the insertion hole 32a so that the distance from the axis X gradually decreases from the mounting surface 31 toward the bottom surface 32.

  5 shows a cross-section at the center position of the insertion hole 32a shown in FIG. 3, the cross-section at the center position of the insertion hole 32b shown in FIG. 3 is the same as FIG. In FIG. 5, the reference numerals in the case of a 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 lever member 50 has a distal end portion 51, a protruding portion 52, and a proximal end portion 53. The tip 51 is a portion that is formed in a substantially cylindrical shape extending along the axis X1 and is inserted into the insertion hole 32a, and has an outer diameter D12 with respect to the axis X1. The protrusion 52 has an outer diameter D11 with respect to the axis X1. The outer diameter D12 of the tip 51 is smaller than the inner diameter D1 of the insertion hole 32a, and the outer diameter D11 of the protrusion 52 is larger than the inner diameter D1 of the insertion hole 32a.

  The cross-sectional shape of the surface orthogonal to the axis line X1 of the distal end portion 51 is a substantially D-shape obtained by slightly reducing the insertion hole 32a. Since the shape of the insertion hole 32a and the cross-sectional shape of the distal end portion 51 are similar to each other, the lever member 50 does not rotate around the axis X1 when the distal end portion 51 is inserted into the insertion hole 32a.

  As shown in FIG. 4, the protrusion 52 of the lever member 50 has a substantially quadrangular shape orthogonal to the axis X1. A pair of sides 52a and 52b extending in the horizontal direction of the projecting portion 52 extend in parallel across the axis X1, and 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. It is formed in an extending shape. The side 52c of the protruding portion 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, the presser plate 80 has a pair of sides 52 a and 52 b of the protruding portion 52 in contact with the first inclined portions 33 a and 33 b, respectively, so that the sparker electrode 40 is perpendicular to the combustion chamber front plate 30. It is attached to the combustion chamber front plate 30 so as to maintain the state of being positioned in the combustion chamber. Here, the pressing plate 80 is attached to the combustion chamber front plate 30 with the packing 90 sandwiched between the protruding portion 52 and the pressing plate 80. Therefore, the packing 90 seals the gap between the insertion hole 32a and the distal end portion 51 of the lever member 50 inserted into the insertion hole 32a.

  Further, as shown in FIG. 8, the presser plate 80 is in a state in which the side 52 c of the protruding portion 52 is in contact with the second inclined portion 33 c and the sparker electrode 40 is positioned in the horizontal direction with respect to the combustion chamber front plate 30. Is attached to the combustion chamber front plate 30.

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 distal end portion 71, a protruding portion 72, and a proximal end portion 73. The distal end portion 71 is a portion that is formed in a substantially cylindrical shape extending along the axis X2 and is inserted into the insertion hole 32b, and has an outer diameter D22 with respect to the axis X2. The protrusion 72 has an outer diameter D21 with respect to the axis X2. The outer diameter D22 of the tip 71 is smaller than the inner diameter D2 of the insertion hole 32b, and the outer diameter D21 of the protrusion 72 is larger than the inner diameter D2 of the insertion hole 32b.

  As shown in FIG. 4, the protrusion 72 of the lever member 70 has a substantially quadrangular shape orthogonal to the axis X2, and the pair of sides 72a and 72b extending in the horizontal direction of the protrusion 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, 33b of the combustion chamber front plate 30. The side 72c of the protruding portion 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, the presser plate 80 has the pair of sides 72 a and 72 b of the projecting portion 72 in contact with the first inclined portions 33 a and 33 b to position the frame rod electrode 60 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 protruding portion 72. Therefore, the packing 90 seals the gap between the insertion hole 32b and the distal end portion 71 of the lever member 70 inserted into the insertion hole 32b.

  In addition, as shown in FIG. 8, the presser plate 80 is in a state in which the side 72 c of the protruding portion 72 is in contact with the second inclined portion 33 d and the frame rod electrode 60 is positioned in the horizontal direction with respect to the combustion chamber front plate 30. Is attached to the combustion chamber front plate 30.

Next, with reference to FIGS. 9 and 10, the contact between the inclined surface 33 and the lever members 50 and 70 when positioning the lever member 50 and the lever member 70 with respect to the combustion chamber front plate 30 will be described.
FIG. 9 is a partially enlarged view of the combustion apparatus 100 shown in FIG. 6 and shows 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. When the presser plate 80 is attached to the combustion chamber front plate 30, the state shown in FIG.

  9 and 10, illustration of the presser plate 80 and the packing 90 shown in FIG. 6 is omitted. 9 and 10 show the lever member 50, the lever member 70 is the same as that shown in FIGS. In FIG. 9 and FIG. 10, the code | symbol at the time of setting it as the insulator member 70 is attached | subjected and shown with the parenthesis. Also in the following description, the description in the case of the lever member 70 is shown with parentheses.

  As shown in FIG. 9, in a state where the insulator member 50 (insulator 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 are formed. The part 33a contacts at the contact point P1 (contact point P3), and the side 52b (side 72b) of the protrusion 52 (protrusion 72) and the first inclined part 33b contact at the contact point P2 (contact point P4). . In the positioned state shown in FIG. 9, the tip 51 (tip 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. The Since the lever member 50 (the lever member 70) is disposed with the axis line X1 (axis line X2) interposed therebetween, the lever member 50 (the lever member 70) is positioned so as not to move in the vertical direction.

  In a state where the insulator member 50 (insulator member 70) is not positioned with respect to the combustion chamber front plate 30, as shown in FIG. 10, for example, the side 52b (side 72b) of the protrusion 52 (protrusion 72) and the second While the 1 inclined part 33b contacts, the side 52a (side 72a) of the protrusion part 52 (protrusion part 72) and the 1st inclination part 33a will be in the state which does not contact. Here, when the work of attaching the presser plate 80 to the combustion chamber front plate 30 is performed and the protrusion 52 (protrusion 72) is pressed toward the combustion chamber C via the packing 90, the insulator member 50 (insulator member 70) extends. A force in a direction in which the axis X1 (axis X2) coincides with the horizontal direction acts.

  Here, the portion of the side 52b (side 72b) of the protruding portion 52 (the protruding portion 72) that contacts the first inclined portion 33b has a curved surface shape with a curvature radius R1 (curvature radius R2). Moreover, the glaze with high surface smoothness is given to the surface of the protrusion part 52 (protrusion part 72), for example. Since the frictional force generated in the portion of the side 52b (side 72b) of the protruding portion 52 (the protruding portion 72) that contacts the first inclined portion 33b is small, the work of attaching the presser plate 80 to the combustion chamber front plate 30 is performed. The position where the side 52b (side 72b) of the protrusion 52 (protrusion 72) contacts 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. It becomes.

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 apparatus 100. FIG. 12 is a rear view showing an electrode mounting portion of the combustion apparatus 100.

  As shown in FIG. 11, the position of the tip 41 of the sparker electrode 40 in the direction of the axis Y extending in the horizontal direction is Y1, and the position of the tip 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, the position Y <b> 1 needs to be disposed 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 Y <b> 2 at an appropriate position in the axis Y direction with respect to the combustion burner 11.

  In the present embodiment, the sides 52 a, 52 b, 52 c of the protrusion 52 of the lever member 50 and the sides 72 a, 72 b, 72 c of the protrusion 72 of the lever member 70 are inclined by the presser plate 80. The state in contact with is maintained. Therefore, both the position Y1 of the front end portion 41 of the sparker electrode 40 and the position Y2 of the front end 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 41 of the sparker electrode 40 in the direction of the axis Z extending in the vertical direction is Z1, and the position of the tip 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, the position Z1 needs to be disposed at an appropriate position in the axis Z direction with respect to the position Z0 of the flame outlet 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 to an appropriate position in the axis Z direction with respect to the position Z0 of the flame outlet of the combustion burner 11. Need to be placed.

  In the present embodiment, the presser plate 80 causes the sides 52 a, 52 b, 52 c of the protrusion 52 of the lever member 50 and the sides 72 a, 72 b, 72 c of the protrusion 72 of the lever member 70 to be inclined surfaces 33 of the combustion chamber front plate 30. The state in contact with 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 at appropriate positions in the axis Z direction with respect to the position Z0 of the flame outlet of the combustion burner 11. Be placed.

The operation and effect of the combustion apparatus 100 of the present embodiment described above will be described.
According to the combustion apparatus 100 of the present embodiment, the sparker electrode 40 and the insulator member 50 are inserted into the insertion hole 32 a formed in the bottom surface 32 of the combustion chamber front plate 30, and the presser plate 80 is attached to the combustion chamber front plate 30. Attached to the surface 31. The protrusion 52 of the lever member 50 is larger than the inner diameter D1 of the insertion hole 32a. Further, the protrusion 52 is formed in a shape such that the sides 52a and 52b extend in the horizontal direction and the side 52c extends in the vertical direction so as to correspond to the inclined surface 33 of the combustion chamber front plate 30. Therefore, the protrusion 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 of being in contact with the two points of the pair of first inclined portions 33 a and 33 b extending in parallel by the presser plate 80. Therefore, the movement of the lever member 50 in the vertical direction is restricted, and the sparker electrode 40 is positioned in the vertical direction. Further, the protruding portion 52 comes into contact with the second inclined portion 33 c by the presser plate 80. Here, the protrusion 52 does not contact the bottom surface 32 of the combustion chamber front plate 30. Therefore, the movement of the lever 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 insulator member 70 are inserted into the insertion hole 32 b formed in the bottom surface 32 of the combustion chamber front plate 30, and the presser plate 80 is moved to the combustion chamber front plate 30. It attaches to the attachment surface 31 of. The protrusion 72 of the lever member 70 is larger than the inner diameter D2 of the insertion hole 32b. Further, the protrusion 72 is formed in a shape such that the sides 72a and 72b extend in the horizontal direction and the side 72c extends 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 brought into contact with the two points of the pair of first inclined portions 33 a and 33 b extending in parallel by the presser plate 80. Therefore, the movement of the lever 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 comes into contact with the second inclined portion 33 d by the presser plate 80. Here, the protrusion 72 does not contact the bottom surface 32 of the combustion chamber front plate 30. Therefore, the movement of the lever 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 apparatus 100 of the present embodiment, the gap between the insertion hole 32a of the combustion chamber front plate 30 and the distal end portion 51 of the insulator member 50, and the insertion hole 32b of the combustion chamber front plate 30 and the distal end portion of the insulator member 70. Since the gap with 71 is sealed by the packing 90, leakage of combustion gas from the combustion chamber C to the outside can be reliably prevented.

[Other Embodiments]
In the above description, the projecting portion 52 has a substantially quadrangular cross-sectional shape perpendicular to the axis X1, and the inclined surface 33 and the pair of first inclined portions 33a and 33b extending in parallel to the horizontal direction extend in parallel to the vertical direction. The second inclined portions 33c and 33d are provided, but other modes 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 presser 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 projecting portion 72 has a substantially quadrangular cross section perpendicular to the axis X2, and the inclined surface 33 is parallel to the pair of first inclined portions 33a and 33b extending in the horizontal direction in the vertical direction. It has a pair of second inclined portions 33c and 33d extending in a straight line, but other modes 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 presser plate 80 is attached to the combustion chamber front plate 30 so as to maintain a state in which the protruding portion 72 is 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 and 72 and the inclined surface 33 are appropriately set so that the protrusions 52 and 72 and the inclined surface 33 are in contact with each other at two or more points. It is possible to change. In this case, the presser plate 80 is attached to the combustion chamber front plate 30 so that the protruding portions 52 and 72 are 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-described embodiment, and various modifications can be made without departing from the scope of the claims. A part of the configuration of the above embodiment can be omitted, or can be arbitrarily combined so as to be different from the above.

DESCRIPTION OF SYMBOLS 10 ... Burner unit, 11 ... Combustion burner, 20 ... Burner case, 30 ... Combustion chamber front plate (plate-shaped member), 31 ... Mounting surface, 31a, 31b ... Fastening hole 32 ... Bottom surface, 32a, 32b ... Insertion hole, 33 ... Inclined surface, 33a, 33b ... First inclined portion, 33c, 33d ... Second inclined portion, 40 ... Su Parker electrode, 41... Tip portion, 50... Insulator member, 51... Tip portion, 52 .. projecting portion, 52 a, 52 b, 52 c.・ ・ ・ Frame rod electrode 61 ・ ・ ・ Tip part 70 ・ ・ ・ Insulator member 71 ・ ・ ・ Tip part 72 ・ ・ ・ Projection part 72 a, 72 b, 72 c ・ ・ ・ Side, 73 ・ ・ ・ Base End, 80 ... Presser plate (mounting member), 81-84 ... Insertion hole, 90 ... Pa Kin (sealing member), 91 to 93 ... insertion hole

Claims (4)

A burner unit having a plurality of combustion burners;
A burner case for accommodating the burner unit;
A plate-like member attached to the front surface of the burner case and forming a combustion chamber with the burner case;
An electrode for ignition or flame detection of the combustion burner;
An insulating insulator member for holding the electrode from the outer peripheral side;
An attachment member for attaching the lever member to the plate-like member,
The plate-like member is
A mounting surface that is formed flat and to which the mounting member is mounted;
A bottom surface that is disposed closer to the combustion chamber than the mounting surface and has an insertion hole into which the electrode and the insulator member are inserted;
An inclined surface connecting the mounting surface and the bottom surface,
The lever member is
A tip formed in a substantially cylindrical shape extending along the axis and inserted into the insertion hole;
A projecting portion having an outer diameter with respect to the axis larger than an inner diameter of the insertion hole and formed in a shape corresponding to the inclined surface;
The combustion apparatus, wherein the attachment member is attached to the plate-like member so as to maintain a state in which the protruding portion is in contact with at least two points of the inclined surface. The protrusion has a substantially quadrangular shape orthogonal to the axis,
The inclined surface has a pair of first inclined portions formed to extend in the same direction,
The mounting member is attached to the plate-like member so as to maintain a state in which a pair of sides of the projecting portion extending in parallel across the axis is in contact with the pair of first inclined portions. Item 4. 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 attachment member is attached to the plate-like member so that another side different from the pair of sides of the protruding portion is in contact with the second inclined portion. The combustion apparatus as described. A sealing member for sealing a gap between the insertion hole and the tip inserted into the insertion hole;
The combustion apparatus according to any one of claims 1 to 3, wherein the attachment member is attached to the plate-like member in a state where the sealing member is sandwiched between the protrusion and the protrusion. .

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