JP2018119744A - Combustor and water heater including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a combustor capable of properly preventing failure such as combustion gas leakage between first and second combustion chambers in a burner case, and also enabling excellent assembly workability.SOLUTION: Each of a pair of heat shielding plates 4 included in a combustor B includes: a main cutout part 40a continuously extending from a lower end part of a heat shielding plate body part 43 to an upper end part thereof in a vertical height direction; and an auxiliary cutout part 40b provided in a region close to an inside edge part of an attachment plate part 41 so as to communicate with the main output part 40a. Both end parts of a partition part P partitioning between first and second combustion chambers 25A, 25B enter the main cutout part 40a and the auxiliary cutout part 40b, and then contact with inside surfaces of side wall parts 20A, 20B of a burner case 2.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a combustion apparatus suitable for use as a component of a hot water supply apparatus, and a hot water supply apparatus including the combustion apparatus.

Specific examples of the combustion apparatus include those described in Patent Documents 1 and 2.
The combustion apparatus described in these documents accommodates a plurality of burner bodies (combustion pipes) in a burner case, and provides a partition portion in the burner case, whereby the burner case has first and first insides. It is divided into two combustion chambers. On the other hand, the front and rear side wall portions of the burner case are covered using a pair of heat shield plates. Thus, when the burner body is driven and burned, the side wall portion of the burner case is prevented from being damaged due to an abnormally high temperature. Combustion air is supplied to the burner case from a separately provided fan. An air flow path through which a part of the combustion air passes between each heat shield and the side wall of the burner case. The heat shield and the side wall can be cooled using the air.

  However, the prior art still has room for improvement as described below.

  That is, when the partition portion is provided in the burner case, it is necessary to prevent combustion gas leakage from one of the first and second combustion chambers in the burner case to the other as much as possible. On the other hand, conventionally, both ends of the partition portion are arranged so as to contact the pair of heat shield plates. In this case, as described above, when an air flow path is formed between the side wall portion of the burner case and the heat shield plate, the air flow path is not partitioned by the partition portion. The second combustion chamber communicates with each other via the air flow path. Therefore, there is a possibility that the combustion gas leaks unduly from one of the first and second combustion chambers toward the other through the air flow path.

JP 2015-42923 A JP2015-49017A

  The present invention has been conceived under the circumstances as described above, while appropriately preventing problems such as combustion gas leakage between the first and second combustion chambers in the burner case, It is an object of the present invention to provide a combustion apparatus that can improve assembly workability and the like, and a hot water supply apparatus including the combustion apparatus.

  In order to solve the above problems, the present invention takes the following technical means.

The combustion apparatus provided by the first aspect of the present invention includes a plurality of side wall portions surrounding the first and second combustion chambers in which a burner body is accommodated and arranged in the width direction, and upper portions of the plurality of side wall portions. A burner case having a top opening and having a substantially horizontal flange portion, a substantially horizontal mounting plate portion fixed on the flange portion, and an inner edge portion of the mounting plate portion. A heat shield plate main body portion extending downward, and of the plurality of side wall portions, the inner surfaces of the pair of side wall portions facing each other in the front-back width direction of the burner case are covered with the heat shield plate main body portion. A combustion apparatus, comprising: a pair of heat shield plates disposed in the partition; and a partition portion disposed in the burner case and partitioning between the first and second combustion chambers, Each of the pair of heat shields is A main notch extending in the vertical direction from the lower end to the upper end of the main body of the heat shield plate, and a region closer to the inner edge of the mounting plate so as to connect to the main notch An auxiliary notch portion provided, and both end portions in the front-rear width direction of the partition portion enter the main notch portion and the auxiliary notch portion, whereby inner surfaces of the pair of side wall portions It is characterized by being in contact with.
Here, the “horizontal width direction” and the “front / rear width direction” are the horizontal width direction and the front / rear width direction of the burner case itself, and do not necessarily coincide with the horizontal width direction or the front / rear width direction of the hot water supply device in which the burner case is incorporated. .

According to such a configuration, the following effects can be obtained.
First, unlike the prior art, both end portions of the partition portion are not attached in a state where they are in contact with the pair of heat shield plates, but directly on the inner side surfaces of the pair of side wall portions of the burner case. It is set as the structure contact | abutted. For this reason, for example, even when an air flow path is formed between the side wall portion of the burner case and the heat shield plate, the air flow path is blocked by the partition portion, and the first and first It is possible to prevent the two combustion chambers from communicating with each other via the air flow path. Therefore, it is possible to prevent the combustion gas from leaking from one of the first and second combustion chambers to the other due to the air flow path or the like. In particular, in the present invention, since each heat shield plate is also formed with an auxiliary notch portion in addition to the main notch portion, both end portions of the partition portion are arranged at the lowermost end of the inner surface of the side wall portion of the burner case. It is possible to make it contact over the wide area | region of the uppermost end, and it can prevent the above-mentioned leakage of combustion gas more appropriately.
Secondly, as means for fixing the partition portion in the burner case, for example, means for fixing both ends of the partition portion to the side wall portion of the burner case from the outside of the burner case can be adopted. . Therefore, it is possible to improve the assembly workability of the combustion apparatus and increase the productivity.
Thirdly, each heat shield plate is divided into two regions on the left and right with the main notch portion interposed between the heat shield plate main body portion, but the attachment plate portion is sandwiched between the auxiliary notch portions 2 It is possible not to have a form divided into two regions, and to make each heat shield plate a single member. Unlike the present invention, as a means for bringing both end portions of the partition portion into contact with the side wall portion of the burner case, for example, each heat shield plate is divided into two members to avoid interference between the partition portion and the heat shield plate. However, according to the present invention, there is a risk that the number of parts of the heat shield increases and the manufacturing cost increases and the assembly work becomes complicated. It can also be eliminated.

  In the present invention, preferably, at least one set of engaging portions capable of positioning and fixing the mounting plate portion with respect to the flange portion when the mounting plate portions of the pair of heat shield plates are stacked on the flange portion. As the engaging portion, a first engaging portion capable of positioning and fixing the vicinity of the auxiliary notch portion of the mounting plate portion to the flange portion is provided.

According to such a configuration, the following effects can be obtained.
As described above, the heat shield plate has a form in which the heat shield main body is divided into two regions via the main notch portion, and the mounting plate portion is also provided with an auxiliary notch portion. In the period from when the heat shield plate is disposed at a predetermined position of the burner case until final fixation is attempted, bending deformation with a position adjacent to the auxiliary notch as a fulcrum, and a position resulting therefrom Misalignment is likely to occur. On the other hand, according to the above configuration, when the heat shield plate is assembled to the burner case, the portion near the auxiliary notch portion is easily displaced from the flange portion of the burner case using the first engagement portion. It can be fixed (temporarily fixed) so as not to occur. Therefore, when the combustion apparatus is assembled, it is possible to appropriately avoid problems such as difficulty in assembling each part of the combustion apparatus due to the displacement of the heat shield plate.

  In the present invention, preferably, as the engaging portion, at least two sets of the mounting plate portion that are closer to both end portions in the lateral width direction than the first engaging portion can be positioned and fixed to the flange portion. The second engaging portion is further provided.

  According to such a configuration, each part based on deformation and deformation of the heat shield plate as compared with the case where the heat shield plate is fixed (temporarily fixed) to the burner case using only the first engaging portion described above. Can be prevented more appropriately and reliably.

  In the present invention, it is preferable that the engaging portion is an engaging convex portion having a downward protruding shape provided on the mounting plate portion, and an engaging convex portion provided on the flange portion and engaged with the engaging convex portion. And a hole.

  According to such a configuration, when the mounting plate portion of the heat shield plate is placed on the flange portion of the burner case and the heat shield plate is assembled to the burner case, the engaging convex portion of the mounting plate portion is engaged with the flange portion. The heat shield plate can be fixed (temporarily fixed) simply by being engaged with the joint hole, and this operation can be performed easily and quickly. Further, since the engaging convex portion has a downward projection shape, for example, when the sealing packing is placed on the flange portion, the engaging convex portion can be prevented from becoming an obstacle.

  In the present invention, preferably, out of the lower part of each of the heat shield plate main body portions of the pair of heat shield plates, the left and right sides of the main notch portion in the lateral width direction protrude toward the inside of the burner case, In addition, a pair of protrusions that form a gap into which the both end portions of the partition portion can enter are provided, and a pair of taper portions that are widened are formed on the inner ends of the ends of the pair of protrusions. Yes.

  According to such a configuration, during the assembly operation of the combustion device, when the end of the partition is set in a state where the end of the partition is fitted into the main notch of the heat shield, the pair of protrusions are formed. The pair of taper portions that are spread out can be used as guide portions for entering the partition portion into the main notch portion. Therefore, it is possible to improve the assembly workability of the combustion device. In addition, since the pair of protrusions are arranged such that the partition portion is sandwiched from both the left and right sides in the lateral width direction, relative positioning and fixing of the partition portion and the heat shield plate are achieved, thereby preventing rattling of these members. An effect can also be obtained.

  In the present invention, it is preferable to further include a seal packing disposed on the flange portion and the attachment plate portion, and the upper surface portion of the partition portion is substantially the same height as the upper surface portion of the attachment plate portion. In addition, a part of the seal packing is arranged on the upper surface portion of the partition portion.

  According to such a configuration, when another device such as a heat exchanger is placed on the flange portion of the burner case, the seal portion is appropriately avoided while preventing the partition portion from hindering it. It is possible to appropriately hermetically seal the connection portion between the burner case and other equipment using the packing for the air. Further, since the region above the upper surface portion of the partition portion can be provided with an airtight seal, the combustion gas passes through the region above the partition portion and from one of the first and second combustion chambers to the other. It is also preferable to prevent leaking out.

The hot water supply apparatus provided by the second aspect of the present invention includes a combustion apparatus provided by the first aspect of the present invention, and hot water by performing heat recovery from the combustion gas generated using the combustion apparatus. And a heat exchanger capable of heating.

  According to such a configuration, the same effect as described for the combustion device provided by the first aspect of the present invention can be obtained.

  Other features and advantages of the present invention will become more apparent from the following description of embodiments of the present invention with reference to the accompanying drawings.

It is principal part front sectional drawing which shows an example of the hot water supply apparatus which concerns on this invention. It is II-II sectional drawing of FIG. (A) is a schematic perspective view of the combustion apparatus used with the hot water supply apparatus shown in FIG. 1, (b) is an III-III principal part expanded sectional view of (a). It is a principal part disassembled perspective view of Fig.3 (a). It is VV principal part sectional drawing of FIG. FIG. 6 is an exploded cross-sectional view of a main part of FIG. It is a principal part expanded front sectional view of FIG. It is a disassembled perspective view of the 1st and 2nd partition plate which comprises the partition part shown in FIG. It is side surface sectional drawing of the 1st and 2nd partition plate shown in FIG. It is side surface sectional drawing of the assembly | attachment state of the 1st and 2nd partition plate shown to FIG. 8 and FIG. It is operation | movement explanatory drawing of a pair of projection part provided in the heat shield.

  Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

  The hot water supply apparatus WH shown in FIG. 1 is capable of two types of hot water supply operations such as general hot water and bath hot water, or general hot water and heating hot water, and the basic configuration itself is a so-called one can 2 known in the art. It is the same as that of the water channel method. Therefore, the overall configuration of the hot water supply device WH will be described relatively simply.

  The hot water supply device WH includes a combustion device B and a heat exchanger HE. Although details of the combustion device B will be described later, the combustion device B includes a burner case 2 that houses therein a plurality of burner bodies 50 (combustion pipes) for burning fuel gas, and the burner case 2 includes first and first burners. 2 is provided with a partition P that partitions the two combustion chambers 25A and 25B, a fan 30 that supplies combustion air into the burner case 2, and a pair of heat shield plates 4 (see FIG. 2).

  The heat exchanger HE is for recovering heat from the combustion gas generated by the combustion device B to perform hot water heating. In the can body 1 mounted on the upper side of the burner case 2, a plurality of fins are provided. The heat transfer tubes Ta and Tb having a serpentine shape in plan view penetrating through 19a and 19b are accommodated, and they are partitioned by a partitioning portion 18. The combustion gas generated in each of the first and second combustion chambers 25A and 25B acts on the heat transfer tubes Ta and Tb to recover heat, and the hot water flowing inside these is heated. Hot water discharged from the heat transfer tube Ta is used for general hot water supply, and hot water discharged from the heat transfer tube Tb is used for bath hot water supply or heating hot water supply. Although omitted in the drawing, a secondary for further recovering latent heat from the combustion gas that has been subjected to sensible heat recovery using the heat exchanger HE is disposed above the heat exchanger HE (primary heat exchanger). A configuration in which a heat exchanger is provided is possible. Instead of the secondary heat exchanger, an exhaust collecting cylinder (a member for exhausting the combustion gas that has passed through the heat exchanger HE) to the outside may be provided.

  3 and 4, the burner case 2 has a substantially rectangular parallelepiped shape with an upper surface opening, and includes a plurality of side wall portions 20 (a front side wall portion 20A, a rear side wall portion 20B, and a pair of left and right side wall portions 20C. ), And a substantially horizontal flange portion 23 (23a to 23c) connected to the upper portion thereof. As shown in FIG. 1, a rectifying plate 8 having a plurality of vent holes 80 is provided near the bottom of the burner case 2, and a plurality of burner bodies 50 are provided side by side on the rectifying plate 8. Each burner body 50 is similar to a conventionally known one described in, for example, Japanese Patent Application Laid-Open No. 2013-242080, and is relatively flat as a whole, and is located at the fuel gas inlet 51 and the upper surface portion. It has a flame surface 52.

  As shown in FIG. 2, the fuel gas can be ejected from the nozzle 32 of the header 31 for supplying fuel gas to the fuel gas inlet 51 of the burner body 50 through the opening 22 of the side wall 20 </ b> A. On the other hand, combustion air (primary air) discharged from the fan 30 is also supplied to the fuel gas inlet 51, and the fuel gas burns at the flame hole surface 52. Among the air supplied from the fan 30 into the burner case 2, a part of the air (secondary air) passes through the ventilation holes 80 of the rectifying plate 8 and is supplied to the installation areas of the plurality of burner bodies 50. The burner bodies 50 of the first and second combustion chambers 25A and 25B can be individually driven to burn.

  The pair of heat shield plates 4 are members for preventing the pair of front and rear side wall portions 20 (20A, 20B) of the burner case 2 from being heated to a high temperature during the combustion driving of the burner body 50 and being thermally damaged. For example, it is formed by pressing a stainless steel plate having excellent properties. As shown in FIG. 4, each of the heat shield plates 4 includes a substantially horizontal plate-like mounting plate portion 41 extending in the lateral width direction of the burner case 2, and extends downward from the inner edge of the mounting plate portion 41. A plurality of burners protruding inward of the burner case 2 from the lower edge of the heat shield main body 43, the main notch 40a, the auxiliary notch 40b, and the heat shield main body 43 standing up and down in the vertical direction It has a main body holding piece portion 42 and a plurality of engaging convex portions 44.

  The heat shield 4 overlaps the mounting plate 41 on the flange 23 (23a, 23b) of the side wall 20 of the burner case 2, and finally uses a screw 91 as shown in FIG. (In FIG. 3 and FIG. 4, the hole 49 provided in the mounting plate 41 and the hole 29 provided in the flange 23 are the screws through which the screws 91 of FIG. 2 are inserted. It is a hole for stopping). When the heat shield plate 4 is attached, the heat shield plate main body 43 covers the inner side surfaces of the side wall portions 20A and 20B, and a lower opening air flow path 39 (insulation gap) is formed between them. Is set to A portion of the air that has passed through the vent hole 80 and has traveled above the rectifying plate 8 flows into the air flow path 39 and passes upward through the air outlet 48 provided at the top of the heat shield plate 4. Therefore, continuous air inflow to the air flow path 39 is performed. As a result, the heat shield plate 4 and the side wall portion 20 are air-cooled, and thermal protection thereof is achieved.

  In FIG. 4, the plurality of engaging convex portions 44 are portions for temporarily fixing the heat shield plate 4 to the burner case 2, and are protruding shapes that protrude downward from the outer edge portion of the mounting plate portion 41. Each engaging protrusion 44 can be formed by providing a partial protrusion on the outer edge of the mounting plate 41 and bending the protrusion downward. The flange portions 23a and 23b are provided with engagement hole portions 24 into which the engagement convex portions 44 are engaged. In the present embodiment, as shown in FIG. 3, as the engagement portion in which the engagement convex portion 44 and the engagement hole portion 24 described above are combined, one set of first heat shield plates 4 is provided. An engaging portion E1, and two sets of second engaging portions E2 are provided. The first engagement portion E1 is located in the vicinity of the auxiliary notch portion 40b. On the other hand, the two sets of second engagement portions E2 are provided at positions closer to both ends in the lateral width direction of the burner case 2 than the first engagement portions E1.

Preferably, as shown in the enlarged view of the main part of FIG. 6, a small protrusion-like projection 44 a having a small protrusion shape by step pressing or the like is provided at a portion near the tip of the engagement projection 44. As a result, in a state where the engaging convex portion 44 is inserted into the engaging hole portion 24, the retaining convex portion 44a is locked to the lower surface portion of the flange portion 23, and the engaging convex portion 44 is easily upward. It will not come out.

  The main cutout portion 40a and the auxiliary cutout portion 40b are portions for allowing both end portions of the partition portion P to enter. The main cutout portion 40a has a substantially rectangular lower opening shape in front view extending in the vertical height direction from the lower end portion to the upper end portion of the heat shield plate main body portion 43. The auxiliary notch 40b is provided in a region near the inner edge of the mounting plate 41 so as to be connected to the upper part of the main notch 40a. The width of the auxiliary notch 40b in the front-rear width direction of the burner case 2 is equal to or greater than the width of the air flow path 39 in the same direction, and when the end portion of the partition portion P enters the auxiliary notch 40b, The end part can be brought into contact with the upper part of the side wall part 20 (20A, 20B).

The main cutout portion 40a is provided so that the heat shield main body 43 is divided into two regions Sa and Sb that face the first and second combustion chambers 25A and 25B, respectively. On the other hand, the auxiliary notch 40b is not provided so that the mounting plate 41 is divided into two regions. In the mounting plate 41, the left and right regions of the auxiliary notch 40b are integrally connected via a narrow auxiliary notch adjacent region 41a located outside the auxiliary notch 40b. The inside of the burner case 2 is partitioned into first and second combustion chambers 25A and 25B by a partition part P. The two regions Sa and Sb of the heat shield main body 43 are divided into the first and second combustion chambers 25A. , 25B face each other.
FIG. 1 shows a heat shield 98 for protecting the pair of side wall portions 20C of the burner case 2, but this is omitted in other drawings. The heat shield 98 is not a technical object of the present invention, and the presence or absence of the heat shield 98 and its specific configuration are not limited.

  As shown in FIG. 7, the partition portion P is configured by combining first and second partition plates 6 and 7. The first partition plate 6 is a member for preventing gas such as combustion gas from leaking out as much as possible between the first and second combustion chambers 25A and 25B. On the other hand, the second partition plate 7 forms an air flow path 38 between the second partition plate 6 and the first partition plate 6, and the first partition plate 6 is thermally damaged when the burner body 50 is driven and burned. It is a member that plays a role as a heat shield for prevention. The first and second partition plates 6 and 7 are formed, for example, by pressing a stainless steel plate having excellent heat resistance, like the heat shield plate 4.

  The first and second partition plates 6 and 7 have a form as shown in FIG. 8, for example, and are connected to each other. For this purpose, the upper horizontal plate parts 63 and 71 provided on the upper parts of the first and second partition parts 6 and 7 are overlapped with each other, and then the engaging hole parts 63a provided on these parts. And means for engaging the engaging projections 72 with each other. As clearly shown in the enlarged view of the main part in FIG. 10, the engaging convex portion 72 is provided with a small protruding convex portion 72 a that is formed by stepping or the like. It is not easily released.

  The first and second partition plates 6 and 7 have stepped projections 61 and 77a that are in contact with each other, so that the first and second partition plates 6 and 7 are in contact with each other. A gap is secured between the two, and this gap serves as an air flow path 38 having a lower opening. The claw-shaped convex portion 76 provided at the lower portion of the second partition plate 7 enters and engages with the concave portion 62 a of the step pushing portion 62 of the first partition plate 6. As a result, the lower opening state of the air flow path 38 is more appropriately secured (the portion other than the claw-shaped convex portion 76 is in the lower opening shape), and the first and second partition plates 6 and 7. The effect which suppresses that position shifts relatively is acquired.

  As shown in FIG. 7, a part of the air discharged from the fan 30 and passing upward through the vent hole 80 of the rectifying plate 8 flows into the air flow path 38 of the partition portion P from below. Thereafter, the air flows out from the air outlets 78 a and 78 b provided in the second partition plate 7. For this reason, air flow is continuously performed in the air flow path 38, and not only the second partition plate 7 but also the first partition plate 6 is air-cooled to prevent thermal damage.

  As clearly shown in FIG. 8, a pair of mounting flange portions 64 a and 64 b are formed on both side edges of the first partition plate 6 so as to face outward and extend in the vertical height direction. Yes. As shown in FIG. 4, in the configuration of the partition portion P in which the first and second partition plates 6 and 7 are connected to each other, the flange portions 64a and 64b are located at both ends of the partition portion P. ing. The partition portion P is incorporated in the burner case 2 so that both end portions enter the main cutout portion 40a and the auxiliary cutout portion 40b of the heat shield plate 4, respectively. At the time of this assembly, as shown in FIG. 5, the flange portions 64 a and 64 b are brought into contact with the inner surface of the side wall portion 20 (20 </ b> A and 20 </ b> B), and screws are fixed using screws 92. This screwing is performed from the outside of the burner case 2. Holes 66 and 27 for screwing are provided in the flange portions 64a and 64b and the side wall portion 20 of the burner case 2 (see also FIG. 6).

  The flange portions 64a and 64b are preferably set so as to face each other over substantially the entire region from the upper end portion to the lower end portion of the side wall portions 20A and 20B. A locking hook 65 for locking to a part of the rectifying plate 8 is provided at the lower part of the partitioning portion P. The bottom of the partitioning portion P is excluded except for the portion where the locking hook 65 is formed. The substantially entire region is set so as to be in close contact with the upper surface of the rectifying plate 8, and consideration is given so that a gap is not generated as much as possible between the inner side surface of the burner case 2 and the partition portion P.

  As shown in FIGS. 2 and 3, a seal packing 9 is mounted on the flange portion 23 of the burner case 2, and leakage of combustion gas or the like occurs between the burner case 2 and the heat exchanger HE. The seal packing 9 is omitted in FIG. The seal packing 9 is provided with a band-like region 90 sandwiched between the partition portion P and the partition portion 18 of the heat exchanger HE. For this reason, it is also appropriately prevented that the combustion gas leaks from one of the first and second combustion chambers 25A and 25B toward the other through the gap between the partition portions P and 18. The mounting plate portion 41 of the heat shield plate 4 is positioned on the flange portion 23. Preferably, the upper surface portion of the partition portion P is set to be substantially the same height as the upper surface portion of the mounting plate portion 41. Yes. If there is a large step between the two, the hermetic sealing performance by the seal packing 9 may be inferior. However, according to the above configuration, such a fear can be eliminated or reduced.

  On the upper surface of the partition portion P, upward projections 73a and 73b are provided, and the band-like region 90 of the seal packing 9 is set between them (see FIG. 3B as well). reference). This appropriately prevents the band-like region 90 from being displaced in the left-right width direction. In the present embodiment, one upward protrusion 73a has a small protrusion shape by cutting and raising, and the other upward protrusion 73b has a rib shape extending in the front-rear width direction, but is not limited thereto. .

  As clearly shown in FIG. 4, a pair of protrusions 45 are provided on the left and right sides of the main notch 40 a in the lower part of the heat shield main body 43. The pair of protrusions 45 protrude toward the inside of the burner case 2, and a gap 45 b into which the end of the partition part P enters is formed between them. As shown in FIG. 11, a pair of taper portions 45 a that are widened are formed at the inner end portions of the pair of protrusions 45.

In FIG. 6, for the sake of convenience, the partition portion P is shown to be inserted into the burner case 2 from above, but the method of incorporating the partition portion P is not limited to this. Preferably, in the burner case 2, the side wall portion (rear side wall portion) 20 </ b> B is a separate member from the other main portion (burner case main body portion) of the burner case 2. In such a configuration, the burner case 2 has a rear opening shape when the side wall portion 20B is not assembled, and the operation of assembling the burner body 50 in the burner case 2 is performed from the rear opening portion of the burner case 2. Can be done. More specifically, as an example of the assembly procedure of the combustion apparatus B, first, the partition portion P is screwed to the side wall portion (front side wall portion) 20A of the burner case 2 having the rear opening shape where the side wall portion 20B is not assembled. And one heat shield 4 is temporarily fixed to the front side wall 20A. Next, the burner body 50 is assembled into the burner case 2 from its rear opening, and aligned using the burner body holding piece 42 of the one heat shield plate 4. Thereafter, the rear side wall portion 20B is assembled to the burner case 2 with the other heat shield plate 4 assembled.

  When performing a series of assembling operations as described above, the end of the partition portion P may enter between the pair of protrusions 45 in the state shown in FIG. In such a case, it is possible to easily and accurately guide the end portion of the partition portion P to the main cutout portion 40a and the auxiliary cutout portion 40b by the guide action of the pair of tapered portions 45a. .

  Next, the operation of the combustion device B and the hot water supply device WH will be described.

  First, both end portions of the partition portion P are not attached in a state of being in contact with the heat shield plate 4, but are configured to be in direct contact with the inner surfaces of the side wall portions 20A and 20B of the burner case 2. . For this reason, the air flow path 39 is also appropriately partitioned by the partition portion P, so that the combustion gas passes through the air flow path 39 and leaks from one of the first and second combustion chambers 25A, 25B to the other. This can be prevented appropriately. In addition, according to the configuration in which the flange portions 64a and 64b provided at both ends of the partition portion P are in direct contact with the side wall portions 20A and 20B, a sealing packing is not interposed between them. It is also possible to obtain an excellent hermetic seal.

  As means for fixing the partition portion P in the burner case 2, means for screwing both end portions of the partition portion P to the side wall portions 20A and 20B from the outside of the burner case 2 is adopted. For this reason, compared with the case where the partition part P is screwed to the heat shield plate 4 inside the burner case 2, for example, the assembly and fixing work of the partition part P is easy, and the assembly workability of the combustion device B is good. Thus, the manufacturing cost can be reduced.

  Although each heat shield 4 is divided into two regions Sa and Sb through the main cutout portion 40a, the mounting plate 41 is not divided into two regions. It can be configured as a single member. Therefore, it is possible to avoid an increase in the number of parts of the heat shield plate 4 and to further reduce the manufacturing cost.

In the heat shield plate 4, the heat shield plate main body 43 is divided into two regions Sa and Sb, and the auxiliary notch adjacent region 41 a of the mounting plate portion 41 has a narrow width. For this reason, the heat shield 4 is easily deformed easily during its handling. On the other hand, in the present embodiment, when the heat shield plate 4 is attached to the side wall portion 20, the first and second engaging portions E1 and E2 are used to attach the attachment plate portion 41 to the flange portion of the burner case 2. It can be temporarily fixed to 23a and 23b. In particular, since the first engaging portion E1 is provided in the vicinity of the auxiliary notch 40b that is most easily deformed in the heat shield plate 4, the effect of suppressing the deformation of the heat shield plate 4 is high. Therefore, for example, the assembling work of the burner main body 50 using the burner main body holding piece 42 of the heat shield 4 can be appropriately performed, and the main notch 40a and the auxiliary notch 40b are provided. Thus, it is possible to appropriately prevent the assembly workability of the combustion device B from being deteriorated. In order to temporarily fix the heat shield plate 4 using the first and second engaging portions E1 and E2, when the mounting plate portion 41 of the heat shield plate 4 is placed on the flange portions 23a and 23b. Since the engaging projection 44 provided on the mounting plate 41 has only to be inserted into the engaging hole 24 of the flanges 23a, 23b, this operation is also easy.

  In addition, in the present embodiment, as described with reference to FIG. 11, the partition portion P is separated from the main notch portion 40 a and the auxiliary notch by using the guide action of the tapered portions 45 a of the pair of protrusion portions 45. It is also possible to facilitate and accurately perform the work of entering the portion 40b. In addition, the upper region of the partition portion P is appropriately hermetically sealed by the strip-shaped region 90 of the seal packing 9, and the possibility of combustion gas leaking between the first and second combustion chambers 25A and 25B is further increased. It is also possible to prevent it.

  The present invention is not limited to the contents of the above-described embodiment. The specific configuration of each part of the combustion apparatus and the hot water supply apparatus according to the present invention can be variously modified within the range intended by the present invention.

The heat shield plate 4 in the above-described embodiment is configured to include a plurality of burner main body holding pieces 42, but may be configured to have no such part. Moreover, the air flow path 39 does not necessarily have to be formed between the heat shield plate 4 and the side wall portions 20A and 20B of the burner case 2, and may be a simple heat-insulating gap, for example.
The main cutout portion and the auxiliary cutout portion provided on the heat shield plate only need to be able to enter both ends of the partition portion, and the specific shape and size thereof are not limited.

The engaging portions (first and second engaging portions E1 and E2) for positioning and fixing the mounting plate portion of the heat shield plate to the flange portion of the burner case include the engaging convex portion and the engaging hole portion described above. Not only the combination structure but also an engagement structure different from these can be adopted.
The partition portion is not limited to the combination of the first and second partition plates 6 and 7 described above, but a combination of a plurality of partition members having a different configuration from these, or a single member. It can also be configured. In short, any configuration that can partition between the first and second combustion chambers may be used. As means for fixing both end portions of the partition portion to the side wall portion of the burner case, fastening means using a member other than a screw, or other connection or joining means may be employed.

  The combustion apparatus according to the present invention is not limited to a gas combustion apparatus, and can be configured as an oil combustion apparatus. The combustion apparatus is not limited to a hot water supply apparatus, and can be used for other applications such as a heating apparatus or an incinerator.

WH Hot-water supply apparatus B Combustion apparatus HE Heat exchanger E1, E2 1st and 2nd engaging part P Partition part 2 Burner case 23 (23a-23c) Flange part 24 Engaging hole part 25A, 25B 1st and 2nd Combustion chamber 4 Heat shield plate 40a Main cutout portion 40b Auxiliary cutout portion 41 Attaching plate portion 43 Heat shield plate body portion 44 Engaging projection 45 Projection portion 45a Taper portion 50 Burner body 9 Seal packing

Claims (7)

An upper surface opening having a plurality of side wall portions surrounding the first and second combustion chambers in which the burner body is accommodated and arranged in the widthwise direction, and a substantially horizontal flange portion continuously provided on top of the plurality of side wall portions. Shaped burner case,
A substantially horizontal mounting plate portion that is overlapped and fixed on the flange portion, and a heat shield plate main body portion extending downward from an inner edge portion of the mounting plate portion, and among the plurality of side wall portions, A pair of heat shield plates arranged so as to cover the inner side surfaces of the pair of side wall portions facing each other in the front-back width direction of the burner case with the heat shield plate main body portion;
A partition portion disposed in the burner case and partitioning the first and second combustion chambers;
A combustion device comprising:
Each of the pair of heat shield plates includes a main cutout portion extending in a vertical direction from the lower end portion to the upper end portion of the heat shield plate main body portion, and the attachment so as to be connected to the main cutout portion. An auxiliary notch provided in the region near the inner edge of the plate portion,
Combustion characterized in that both end portions of the partition portion in the front-rear width direction are in contact with the inner side surfaces of the pair of side wall portions by entering the main notch portion and the auxiliary notch portion. apparatus. The combustion device according to claim 1,
When the mounting plate portion of the pair of heat shield plates is stacked on the flange portion, the mounting plate portion includes at least one set of engaging portions capable of positioning and fixing with respect to the flange portion;
A combustion apparatus comprising a first engaging portion capable of positioning and fixing the vicinity of the auxiliary notch portion of the mounting plate portion to the flange portion as the engaging portion. A combustion apparatus according to claim 2, wherein
As the engaging portion, at least two sets of second engaging portions capable of positioning and fixing to the flange portion positions closer to both ends in the lateral width direction than the first engaging portion of the mounting plate portion. A combustion apparatus further comprising: The combustion apparatus according to claim 2 or 3,
The engaging portion is a combination of a downward projecting engaging convex portion provided in the mounting plate portion and an engaging hole portion provided in the flange portion into which the engaging convex portion is engaged. Combustion device configured. A combustion apparatus according to any one of claims 1 to 4,
Of the lower part of each heat shield plate main body of the pair of heat shield plates, the left and right sides of the main notch in the lateral width direction protrude toward the inside of the burner case, and the both ends of the partition portion A pair of protrusions forming a gap into which the part can enter,
A combustion device in which a pair of tapered portions are formed at the tip inner portions of the pair of protrusions. A combustion apparatus according to any one of claims 1 to 5,
A seal packing disposed on the flange portion and the mounting plate portion;
The upper surface portion of the partition portion is set to be substantially the same height as the upper surface portion of the mounting plate portion, and a part of the seal packing is disposed on the upper surface portion of the partition portion. Combustion device configured. A combustion apparatus according to any one of claims 1 to 6;
A heat exchanger capable of performing hot water heating by performing heat recovery from the combustion gas generated using this combustion device;
A hot water supply apparatus comprising:

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