JP6299312B2 - Combustion device - Google Patents

Description

  The present invention relates to a combustion apparatus, and more particularly to a combustion apparatus having excellent maintainability.

  As an example of a combustion apparatus, for example, Japanese Patent Application Laid-Open No. 1-310265 (Patent Document 1) discloses an apparatus having a structure in which a blower (fan) is fixed to a side surface of a combustion gas collecting box in which a burner is disposed. Has been. In addition, the fan is attached to the burner in this kind of combustion apparatus by inserting one end of a flange for fixing the fan between the fixing plate and the burner and fixing the other end with a screw. This is done by fixing directly to the case. At the time of maintenance, the fan can be removed from the burner case by removing the screw that fixes the other end.

JP-A-1-310265

  In the conventional combustion apparatus, the direction in which the fan is removed is limited due to the installation location and the complicated internal structure. For this reason, there is a problem that the maintenance direction is limited. Therefore, a structure with better maintainability is required. Then, an object of this invention is to provide the combustion apparatus excellent in maintainability.

  The combustion apparatus according to the present invention includes an air blowing part, a combustion part, and first and second fixing parts. The blower section supplies air from the blower opening and has an attachment portion around the blower opening. The combustion unit receives air from the blower opening. The first and second fixing portions are arranged so as to sandwich the air blowing port, and press the attachment portion so as to contact the combustion portion to fix the air blowing portion to the combustion portion. At least one of the first and second fixing parts has one engaging part of the concave part and the convex part, and the air blowing part has the other engaging part of the concave part and the convex part. The one engaging portion is fitted to the other engaging portion.

  In the combustion apparatus, the air blowing part is fixed to the combustion part by pressing the first and second fixing parts so that the attachment part comes into contact with the combustion part. Therefore, unlike the case where the air blowing part is directly fixed to the combustion part via a connecting member such as a screw, the air blowing part can be removed from the combustion part by removing one of the first and second fixing parts. it can. Moreover, since the 1st and 2nd fixing | fixed part is arrange | positioned in the position which pinches | interposes a ventilation opening mutually, a ventilation part can be removed from a combustion part from any side which pinched | interposed the ventilation opening. For this reason, the freedom degree of a maintenance direction can be expanded more. Further, the fitting of the one engaging part and the other engaging part makes it possible to position the blower part more reliably with respect to the combustion part. Therefore, according to the combustion apparatus, a combustion apparatus having excellent maintainability can be provided.

  Preferably, in the combustion apparatus, the attachment portion includes a contact portion that comes into contact with the combustion portion, and a protrusion that is the convex portion formed so as to protrude from the contact portion. At least one of the first and second fixing portions includes a hole that is the concave portion into which the protrusion can be inserted. Thereby, a ventilation part can be positioned more reliably with respect to a combustion part.

  Preferably, in the combustion apparatus, the protrusion is formed so that the width decreases as the distance from the contact portion increases. Moreover, the hole has a circular shape when viewed from the direction in which the protrusion is inserted. Thereby, a ventilation part can be positioned more reliably with respect to a combustion part.

  Preferably, in the above combustion apparatus, the protruding portion stands upright with respect to the contact portion. Thereby, a projection part can be easily inserted with respect to a hole.

  Preferably, in the combustion apparatus, the combustion unit includes a first surface on which the air blowing unit is fixed, and a second surface intersecting the first surface. The first fixing portion is fixed to the first surface. The second fixing portion is fixed to the second surface. Thereby, the removal operation | work of the ventilation part from a combustion part can be performed from the direction which mutually cross | intersects. Therefore, the freedom degree of the direction which removes the ventilation part from a combustion part at the time of a maintenance can be expanded more. Therefore, it is possible to provide a combustion apparatus that is further excellent in maintainability.

  Preferably, in the above combustion apparatus, the attachment portion is a flange portion extending in a direction away from the blower opening. Thereby, a ventilation part can be more easily attached with respect to a combustion part.

  ADVANTAGE OF THE INVENTION According to this invention, the combustion apparatus excellent in maintainability can be provided.

It is the schematic which shows the structure of the combustion apparatus which concerns on one embodiment of this invention. It is a schematic perspective view which shows the attachment structure of the ventilation part to the combustion part in the combustion apparatus which concerns on one embodiment of this invention. It is another schematic perspective view which shows the attachment structure of the ventilation part to the combustion part in the combustion apparatus which concerns on one embodiment of this invention. It is a schematic plan view which shows the attachment structure of the ventilation part to the combustion part in the combustion apparatus which concerns on one embodiment of this invention. FIG. 5 is a schematic diagram showing a cross-sectional structure along a line segment VV in FIG. 2. It is a schematic enlarged view for demonstrating the attachment structure of the ventilation part to the combustion part in the combustion apparatus which concerns on one embodiment of this invention. It is a schematic enlarged view which shows the state by which the fixing | fixed part was attached to the attachment part of the ventilation part in FIG. It is a schematic plan view which shows the structure of the attachment part of the ventilation part in the combustion apparatus which concerns on one embodiment of this invention. It is the schematic which shows the cross-sectional structure along line segment IX-IX in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. First, the overall configuration of the combustion apparatus according to the present embodiment will be described with reference to FIG.

  Referring to FIG. 1, a combustion apparatus 1 according to the present embodiment is a combustion apparatus capable of burning liquid fuel. The combustion apparatus 1 includes a housing 2, a burner 3 as a combustion unit, a fan 4 as a blower unit, a primary heat exchanger 5, a secondary heat exchanger 6, an exhaust collecting cylinder 7, and a silencer 8. The neutralizer 9, the pipe 10, the water supply pipe 11, the water inlet 11 a, the hot water supply pipe 12, the hot water outlet 12 a, the tray 13, and the pump 16 are mainly included.

  The housing 2 includes a burner 3, a fan 4, a primary heat exchanger 5, a secondary heat exchanger 6, an exhaust collecting cylinder 7, a silencer 8, a neutralizer 9, a pipe 10, a water supply pipe 11, a hot water supply pipe 12, and a tray 13. The pump 16 can be housed inside. An exhaust port EP is provided on the front surface of the housing 2. The exhaust port EP is configured such that combustion gas from which sensible heat has been recovered by the primary heat exchanger 5 and latent heat has been recovered by the secondary heat exchanger 6 can be exhausted to the outside of the housing 2. In addition, a water inlet 11a for water supply and a hot water outlet 12a for hot water supply are provided on the side surface of the housing 2.

  The burner 3 is supplied with air from the fan 4, generates combustion gas for heat exchange, and supplies the combustion gas to the primary heat exchanger 5 and the secondary heat exchanger 6.

  The fan 4 is for supplying air necessary for combustion to the burner 3. The fan 4 is configured to be able to supply combustion air downward from above the burner 3.

  The primary heat exchanger 5 is a sensible heat recovery type heat exchanger. The hot water in the primary heat exchanger 5 is heated by heat exchange with the high-temperature combustion gas. The secondary heat exchanger 6 is a latent heat recovery type heat exchanger. The combustion gas after heat exchange in the primary heat exchanger 5 is passed to the secondary heat exchanger 6 so that the water in the secondary heat exchanger 6 is preheated. In this process, the temperature of the combustion gas is lowered to about 60 ° C., so that moisture contained in the combustion gas is condensed and latent heat can be obtained.

  One end of the primary heat exchanger 5 and one end of the secondary heat exchanger 6 are connected to each other by a pipe 10. A water supply pipe 11 is connected to the other end of the secondary heat exchanger 6, and a hot water supply pipe 12 is connected to the other end of the primary heat exchanger 5. The primary heat exchanger 5 is arranged closer to the burner 3 than the secondary heat exchanger 6.

  The exhaust collecting cylinder 7 and the silencer 8 constitute a combustion gas flow path connected in series. The exhaust collecting cylinder 7 is located on the downstream side of the primary heat exchanger 5 and the secondary heat exchanger 6. The silencer 8 is located on the downstream side of the exhaust collecting cylinder 7. As shown by the arrows in FIG. 1, the combustion gas generated in the burner 3 passes around the primary heat exchanger 5 and the secondary heat exchanger 6 and passes through the primary heat exchanger 5 and the secondary heat exchanger 6. After exchanging heat with water, it passes through the exhaust collecting cylinder 7 and is sent to the silencer 8 and is discharged out of the housing 2 from the exhaust port EP.

  Since the condensed water (drain) is generated due to the structure in which the water vapor of the combustion gas is condensed in the secondary heat exchanger 6 as described above, drainage of the drain is necessary. A neutralizer 9 is disposed below the secondary heat exchanger 6, and drainage is drained from the secondary heat exchanger 6 to the neutralizer 9. Since the combustion gas contains nitrogen oxides and the like, it dissolves in the drain and the drain becomes acidic. The neutralizer 9 is for neutralizing the acidic drain. The neutralizer 9 is filled with a neutralizing agent for neutralizing acidic drain. The drain neutralized by the neutralizer 9 is discharged out of the housing 2 through a drainage channel (not shown).

  The water inlet 11 a is connected to the water supply pipe 11 and configured to supply water to the primary heat exchanger 5 and the secondary heat exchanger 6 via the water supply pipe 11. The hot water outlet 12a is connected to the hot water supply pipe 12, and is configured to be able to supply hot water heated by the primary heat exchanger 5 and the secondary heat exchanger 6. Thereby, when the water supplied from the water inlet 11a passes through the primary heat exchanger 5 and the secondary heat exchanger 6, it is heated by the combustion gas and supplied from the hot water outlet 12a.

  The tray 13 is configured such that the pump 16 can be placed on the upper surface. The pump 16 is for supplying liquid fuel to the burner 3. The pump 16 is configured to be able to supply liquid fuel such as kerosene stored in a fuel tank to the burner 3 via a pipe.

  Next, the attachment structure of the fan 4 to the burner 3 will be described with reference to FIGS. The fan 4 supplies air to the burner 3 from the blower opening 60. A flange portion 45 as an attachment portion is provided around the blower opening 60 of the fan 4. The flange portion 45 is formed to extend in a direction away from the blower opening 60. The fan 4 is fixed to the burner 3 at the flange portion 45.

  Referring to FIGS. 2 and 3, combustion apparatus 1 includes first fan fixing plate 50 (first fixing portion) and second fan fixing plate 40 (second fixing) for fixing fan 4 to burner 3. Part). Referring to FIG. 2, the second fan fixing plate 40 includes a pressing piece 41 and a fixing piece 42, and has a structure bent at a connecting portion between the pressing piece 41 and the fixing piece 42. The fixing piece 42 is provided with a plurality of (two in FIG. 2) screw holes, and the fixing piece 42 is fixed on the side surface 31 b of the burner 3 by screws 43. That is, the second fan fixing plate 40 is fixed on the side surface 31b (second surface) intersecting the upper surface 31a (first surface) in the burner 3. Thus, the pressing piece 41 sandwiches the flange portion 45 between the pressing piece 41 and the flange portion 45 is pressed by the pressing piece 41 so as to come into contact with the burner 3, whereby the fan 4 is fixed to the burner 3. . 2 shows a disassembled state in which the second fan fixing plate 40 is removed from the flange portion 45 for convenience of explanation.

  Referring to FIG. 3, the first fan fixing plate 50 includes a pressing piece 51 and a fixing piece 52, and has a structure bent at a connection portion between the pressing piece 51 and the fixing piece 52. The fixing piece 52 is provided with a plurality of (two in FIG. 3) screw holes, and the fixing piece 52 is fixed to the upper surface 31 a of the burner 3 by screws 53. That is, the first fan fixing plate 50 is fixed to the upper surface 31 a to which the fan 4 is fixed in the burner 3. Accordingly, the fan piece 4 is fixed to the burner 3 by sandwiching the flange portion 45 between the pressing piece 51 and the burner 3 and pressing the flange portion 45 by the pressing piece 51 so as to contact the burner 3. . 3 shows the disassembled state in which the first fan fixing plate 50 is removed from the flange portion 45 for convenience of explanation, as in FIG. Referring to FIG. 4, first fan fixing plate 50 and second fan fixing plate 40 are arranged so as to sandwich air blowing port 60 of fan 4 with each other. Note that the fixing portion that presses the flange portion 45 is not limited to the first and second fan fixing plates 50 and 40 as in the present embodiment, and the flange portion 45 is pressed and fixed by two or more fixing portions. May be.

  2 and 3, the burner 3 has a box-shaped burner case 31. The burner case 31 includes an upper surface 31a to which the fan 4 is fixed and a side surface 31b that intersects the upper surface 31a. Referring to FIG. 5, a burner body 32 is disposed inside the burner case 31, and the liquid fuel supplied by the pump 16 (FIG. 2) is burned in the burner body 32.

  The burner case 31 is provided with an opening 33. The fan 4 is fixed to the burner case 31 at the flange portion 45, and the air blowing port 60 communicates with the opening portion 33. Thereby, the air supplied from the blower opening 60 of the fan 4 can be supplied into the burner case 31, and combustion gas can be generated in the burner body 32.

  Next, details of a method of fixing the fan 4 to the burner 3 using the fan fixing plate will be described with reference to FIGS. 6 and 7. In FIG. 6, the first fan fixing plate 50 is removed from the flange portion 45, and in FIG. 7, the first fan fixing plate 50 is attached on the flange portion 45.

  Referring to FIG. 6, the flange portion 45 includes a contact portion 44 that comes into contact with the upper surface 31 a of the burner case 31, and a protrusion 46 formed so as to protrude from the contact portion 44 (the convex portion and the other engagement). Part). As shown in FIG. 6, the protruding portion 46 stands upright with respect to the abutting portion 44, and is spaced from the upper surface 31 a. Referring to FIG. 7, first fan fixing plate 50 includes a hole portion 54 (a concave portion, one engaging portion), and protrusion portion 46 provided in flange portion 45 can be inserted into hole portion 54. It has become. The hole 54 has a circular shape when viewed from the direction in which the protrusion 46 is inserted. The protrusion 46 is inserted into the hole 54 from the tip to the middle, and is in contact with the inner periphery of the hole 54 at the upper end. As a result, the fan 4 and the first fan fixing plate 50 are fixed to each other, and as a result, the fan 4 is fixed to the burner 3.

  In the present embodiment, the first fan fixing plate 50 has a hole 54 (concave portion) as one engaging portion of the concave portion and the convex portion, and the fan 4 has a protruding portion 46 as the other engaging portion. Although the case has been described, the present invention is not limited to this. That is, the first fan fixing plate 50 may have a protrusion and the fan 4 may have a hole.

  Further, in the present embodiment, the case where the hole portion 54 is formed in the first fan fixing plate 50 has been described. However, a hole portion is similarly formed in the second fan fixing plate 40, and the fan 4 has a hole portion in the hole portion. Another protrusion to be inserted may be provided.

  Further, in the present embodiment, the case where the protrusion 46 is provided on the flange 45 of the fan 4 has been described, but the protrusion 46 may be provided at another location of the fan 4. In the present embodiment, the case where the fan 4 and the first fan fixing plate 50 are fixed by the fitting of the protrusion 46 and the hole 54 has been described. However, the present invention is not limited to this. Various modifications are possible as long as the engaging portion is fitted to the other engaging portion.

  Next, the detailed structure of the flange part 45 is demonstrated, referring FIG. 8 and FIG. Referring to FIG. 8, the protrusion 46 is formed so that the width decreases as the protrusion 46 moves away from the connection portion with the contact portion 44. That is, the protrusion 46 has a tip width W1 smaller than a width W2 at the connection portion with the contact portion 44. Referring to FIG. 9, the protrusion 46 is formed so as to form an inclination angle θ with respect to the contact portion 44. The inclination angle θ is, for example, 25 °.

  As described above, in the combustion apparatus 1 according to the present embodiment, the first and second fan fixing plates 50 and 40 press the flange portion 45 of the fan 4 so as to contact the burner 3, so that the fan 4 It is fixed to the burner 3. Therefore, unlike the case where the fan 4 is directly fixed to the burner 3 via a connecting member such as a screw, the fan 4 is removed from the burner 3 by removing one of the first and second fan fixing plates 50 and 40. Can be removed. In addition, since the first and second fan fixing plates 50 and 40 are arranged at positions where the air blowing port 60 is sandwiched between them, the fan 4 can be removed from the burner 3 from either side across the air blowing port 60. For this reason, the freedom degree of a maintenance direction can be expanded more. For example, the fan 4 can be removed from the burner 3 by removing the first fan fixing plate 50 in the case of an outdoor device and removing the second fan fixing plate 40 in the case of an indoor device. Further, since the first fan fixing plate 50 and the fan 4 are fixed to each other by the fitting of the protrusion 46 and the hole 54, the fan 4 can be positioned more reliably with respect to the burner 3. Thus, the combustion apparatus 1 which concerns on this Embodiment is a combustion apparatus which was excellent in maintainability.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The combustion apparatus of the present invention can be applied particularly advantageously in a combustion apparatus that requires improved maintainability.

  DESCRIPTION OF SYMBOLS 1 Combustor, 2 Housing, 3 Burner, 4 Fan, 5 Primary heat exchanger, 6 Secondary heat exchanger, 7 Exhaust tube, 8 Silencer, 9 Neutralizer, 10 Piping, 11 Water supply piping, 11a Water inlet , 12 Hot water supply pipe, 12a Hot water outlet, 13 tray, 16 pump, 31 burner case, 31a upper surface, 31b side surface, 32 burner body, 33 opening, 40 second fan fixing plate, 50 first fan fixing plate, 41, 51 Pressing piece, 42, 52 Fixed piece, 43, 53 Screw, 44 Abutting part, 45 Flange part, 46 Protruding part, 54 Hole part, 60 Blower.

Claims (4)

Air is supplied from the air outlet, and the air blower has an attachment portion around the air outlet,
A combustion section for receiving the air from the air outlet;
The first and second fixing parts are arranged so as to sandwich the air blowing port, press the attachment part so as to contact the combustion part, and fix the air blowing part to the combustion part,
At least one of the first and second fixing portions has one engaging portion of a concave portion and a convex portion, and the air blowing portion has the other engaging portion of the concave portion and the convex portion,
The one engaging portion is fitted to the other engaging portion ,
The mounting portion is
A contact portion that contacts the combustion portion;
Including a projecting portion that is the convex portion formed so as to project from the contact portion,
At least one of the first and second fixing portions includes a hole that is the recess into which the protrusion can be inserted,
The protrusion is formed such that the width decreases as the distance from the contact portion increases.
The said hole part is a combustion apparatus which has a circular shape seeing from the direction where the said projection part is inserted . The combustion apparatus according to claim 1 , wherein the protruding portion stands upright with respect to the contact portion. The combustion unit includes a first surface to which the air blowing unit is fixed, and a second surface intersecting the first surface,
The first fixing portion is fixed to the first surface;
The combustion apparatus according to claim 1 or 2 , wherein the second fixing portion is fixed to the second surface. The combustion apparatus according to any one of claims 1 to 3 , wherein the attachment portion is a flange portion extending in a direction away from the blower opening.

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