JP2000249405A - Heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve working environment, achieve easy separation and reduce costs by providing an engaging portion in a flange and permitting a portion of a packing to engage with the engaging portion. SOLUTION: In assembling a water heater, a packing 43 is arranged in advance at a case piece 10 of a burner 7 and a flange 15A of a case piece of a smoke exhausting portion. Namely, the packing 43 is arranged along a turning over portion 37 provided at the end of the flange 15A. A protrusion 45 of the packing 43 is pressed into a notch 40. The turning over portion 37 of the notch 40 is clamped by cuts 46 of the packing 43, so that the protrusion 45 and the notch 40 are engaged with each other. The protrusion 45 of the packing 43 and the flange 15A are, respectively, provided one on each side, and therefore when all of the protrusions 45 and the notches 40 are engaged, the packing 43 is necessarily fixed to a given position of the flange 15A.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating device for heating water or the like, and more particularly, to a heating device characterized by a packing mounting structure at a flange joint. The heating device of the present invention is suitable as a structure of a water heater or a bath device.

[0002]

2. Description of the Related Art Today, water heaters are widely used in ordinary households and factories. Water heaters are broadly classified into those using gas as a heat source, those using liquid fuel, and those using electricity. However, the configuration of the water heater is the same as having a heat source section and a heat exchange section regardless of which heat source is used. Is added.

That is, in a water heater 100 using gas as a heat source, a burner 2 and a heat exchanger 3 are built in an integral case 101 as shown in FIG. The blower 5 is attached to one end, for example, the lower end of the case 101, and the smoke exhaust tube 6 is provided on the other end, for example, the upper end.

[0004] By the way, in a water heater which is mass-produced like a household water heater, in order to facilitate the manufacture of each part and the assembling work of these parts, the whole is made up of a burner section 7, a heat exchange section 8, and a smoke exhaust section. A design structure divided into blocks such as a unit (or an aggregation unit) 9 is employed. In this structure, for example, the burner portion 7 is formed by integrating a case piece 10 corresponding to the lower end portion of the case 101 and the burner 2 and is separately manufactured in advance through a predetermined process. Heat exchange section 8
Is a case in which the case piece 11 and the heat exchanger 3 constituting the intermediate portion are integrated, and is manufactured independently through a predetermined process similarly to the above-described burner section 7. Further, the smoke exhaust section 9 is a case piece 12 that constitutes the upper end side of the case 101, and is provided with a smoke exhaust port 13. The smoke exhaust section 9 is also manufactured independently through a predetermined process.

[0005] In the above configuration, each case piece 1
A flange is provided at a connection portion of 0, 11, and 12, and the burner unit 7, the heat exchange unit 8, and the smoke exhaust unit 9 are joined via the flange. More specifically, the case piece 10 constituting the lower end of the case 101 has a structure in which the lower end is closed and the upper surface is open, and a flange 15a is provided on the upper surface serving as the open end. Flange 15a
The outermost end portion is folded upward over the entire circumference to form a folded portion 120. Case 101
The case piece 11 which constitutes the intermediate portion has a cylindrical structure with both ends opened, a flange 15b is provided at a lower open end, and a flange 16a is provided at an upper open end. Its end is folded back on the opposite side to the flange surface for reinforcement. Further, the case piece 12 constituting the upper end of the case 101 has a structure in which the lower end is opened and the upper end is closed, and the flange 1 is attached to the lower end which is the open end.
6b is provided. At the tip of the flange 16b,
A folded portion 121 folded downward is provided.

The case pieces 10, 11, and 12 have flanges 15a and 15b and flanges 16a and 16b overlapped with each other, and are integrally connected by screws (not shown). In addition, packings 110 and 111 are interposed between the flanges in order to ensure airtightness between the case pieces 10, 11 and 12. That is, the packing 110 is interposed between the flange 15 a provided on the lower case piece 10 and the flange 15 b provided on the middle case piece 11. Similarly, the middle case piece 1
1 and the upper case piece 12
Between the flanges 16b provided on the
Is interposed.

FIG. 10 is an overall perspective view and an enlarged sectional perspective view of a packing used in a conventional water heater. The packings 110 and 111 used in the water heater 100 of the prior art are all case pieces 10, 11 and 12.
Are formed in a rectangular ring shape so as to conform to the shapes of the flanges 15a and 16b. As a material of the packings 110 and 111, for example, a material mainly composed of glass fiber is adopted in consideration of heat resistance.

The packing 11 employed in the prior art
0 and 111 are provided with an adhesive layer 115 on one surface and a release paper 116 laminated thereon. Prior art water heater 10
When assembling, the flange 15a of the case piece 10
And a flange 16 provided on the case piece 12 of the smoke exhaust section 9
b. Packing 110, 111
111 is temporarily fixed, and then the opposing case pieces are overlapped and joined. More specifically, when connecting the lowermost case piece 10 and the intermediate case piece 11, the packing 110 is attached to the flange 15a of the lower case piece 10. That is, the release paper 116 of the packing 110 is peeled off to expose the adhesive layer 115, and the packing 110 is placed in accordance with the flange 15a. Actually, the folded portion 12 provided at the end of the flange 15a is provided.
The packing 110 will be arranged along 0.

Subsequently, the intermediate case piece 11 is
And make the flanges 15a and 15b coincide with each other. Finally, flanges 15a and 15
b are joined together. Also, packing 111 is temporarily fixed to the flange 16b of the uppermost case piece 12 in the same manner as described above, and then the opposing middle case piece 11 is placed.
On top and join.

The general structure of the water heater 100 according to the prior art is as described above. In the three blocks described above, the burner section 7 is further divided into a main body section 20 and a front pipe section 21. ing. That is, the main body 20 has the burner 2 disposed inside. In contrast, the front tube 2
Reference numeral 1 denotes a case in which a part of the side wall of the case piece 10 is detachable, and a nozzle 23 is mounted on the inner surface. When the front tube 21 is mounted at a predetermined position, the nozzle 23
Enters the gas inlet 26 of the burner 2.

A flange structure is also used to connect the main body 20 of the burner section 7 to the front pipe section 21. That is, an opening is provided on the side surface of the case piece of the main body 20, and a flange 27a is provided. On the other hand, the front tube portion 21 is also provided with a flange 27b. And both flanges 27a,
27b are overlapped and joined together, and the front tube 21
Constitute a part of the wall of the case piece 10. The main body 20
Also, packing is interposed at the connection portion with the front pipe portion 21 to ensure airtightness. The packing between the main body 20 and the front tube 21 is made of a silicone resin. The appearance structure of the packing at that portion is substantially the same as the packings 110 and 111 described above,
5 and release paper 116 are stacked. The packing is formed in a rectangular ring shape so as to match the shape of the flanges 27a and 27b.

The procedure for mounting the front tube portion 21 is the same as described above. After the packing is temporarily fixed to the flange 27a by gluing, the flanges 27a, 2
7b are joined together.

The smoke exhaust tube 6 is attached to the case piece 12 of the smoke exhaust unit 9 as described above, and the flange structure is also used for attaching the smoke exhaust tube 6. That is, an opening is provided on the side surface of the case piece 12, and the flange 31a is provided. On the other hand, the smoke exhaust tube 6 is provided with a flange 31b. The two flanges 31a and 31b are overlapped with a packing interposed therebetween, and are integrally connected.

The packing used in the smoke exhaust section 9 is the same as the packings 110 and 111 described above, has an adhesive layer 115 and release paper 116, and is formed in a rectangular ring shape. In addition, the procedure for assembling the portion is not much different from that of the preceding portion. After the packing is adhered to the flange 31b of the smoke exhaust tube 6 and temporarily fixed, the flanges 31a and 31b are joined to each other with screws or tacks (not shown).

[0015]

SUMMARY OF THE INVENTION Prior art water heater 10
Reference numeral 0 indicates that a packing having an adhesive layer is employed to simplify the assembling work. Although the prior art water heater 100 has a considerable effect in this respect, it still has a problem to be improved. That is, when the packing 110 and the like are temporarily fixed, the release paper 116 is peeled from the main body of the water heater 100 according to the related art. However, since the main body of the packing is made of glass fiber, the release paper 116 is used.
When peeled off, the glass fiber scatters, deteriorating the working environment.

Further, the release paper 116 which has been peeled off is not suitable for recycling because paraffin is attached thereto, remains as refuse, and must be incinerated.

According to the prior art, the packing 110 is bonded to a predetermined position in advance. At this time, the packing 110 may be stuck to a position shifted from the predetermined position by mistake. Is difficult to modify.
Furthermore, even if the wrong packing 110 is attached, it is difficult to confirm the error, and a product may be completed with the packing 110 being shifted. That is, the flange 15a is provided with a folded portion 120 at the outermost end in order to prevent the packing from shifting, and the packing 110 is mounted inside the folded portion 120. Therefore packing 11
0, although it is unlikely that the packing will be shifted outward from the predetermined position, there is no member that restricts the position of the packing at the inner end of the flange, so the packing is temporarily fixed with the packing shifted inward. Sometimes. When the case 4 is assembled in this state, a part without the packing 110 is partially formed between the flanges 15a and 15b. However,
As described above, since the folded portion 120 is provided over the entire periphery outside the flanges 15a and 15b, the folded portion 120 becomes an obstacle and the packing 1 is externally provided.
It is difficult to visually confirm the mounting state of No. 10. As a result, the case 4 is assembled with the wrong mounting state.

In the prior art, as described above, the adhesive layer 1
In order to use a packing having
However, there is a problem that the manufacturing cost of itself is high. Further, the conventional water heater 100 has a problem that the adhesive layer 115 is burned in an early stage of use, and an unpleasant odor is generated. Of course, these adverse effects also apply to the packing 111 and the like in other parts.

The conventional water heater 1 also has a problem when the equipment is discarded. That is, not only water heaters, but also metals and resins of equipment should be reused as much as possible. For this reason, it is important that metal parts and resin parts or inorganic parts be easily separated. However, in the conventional water heater 1, the packing 110 and the like are attached by the adhesive layer 115 at the time of assembly, so that it is difficult to separate the metal portion and the inorganic portion.

Therefore, the present invention focuses on the above-mentioned problems of the prior art, and improves the working environment, prevents assembly failure, prevents generation of unusual odor, and facilitates separation while ensuring the same ease of assembly as before. It is an object of the present invention to develop a heating device capable of reducing the cost.

[0021]

Means for Solving the Problems According to a first aspect of the present invention, there is provided a case having at least a heat source section for generating heat and a heat exchange section, which share a space. Is housed in the case, the case is composed of a plurality of case pieces, some of the case pieces are joined by a flange, and in a heating device in which packing is interposed between the flanges, the flange is provided with an engagement portion. And a part of the packing is engaged with the engagement portion.

In the heating device according to the present invention, the flange is provided with the engaging portion. Then, a part of the packing is engaged with the engaging portion on the flange side, and the packing is temporarily fixed. In the heating device of the present invention, there is no need to provide an adhesive layer on the packing,
Temporarily fix packing without using adhesion. Therefore, in the heating device of the present invention, it is not necessary to peel off the release paper, and the glass fiber or the like does not scatter, so that the working environment is improved.
Also, since it does not have an adhesive layer, there is no generation of off-flavor due to burning. Furthermore, the packing and the flange side
Since they are temporarily fixed by a mechanical engagement relationship, it is easy to separate the two when discarding.

A second aspect of the present invention for achieving the same object.
The invention described in the above, at least a heat source unit that generates heat,
It has a heat exchange part, these are housed in a case sharing a space, the case consists of a plurality of case pieces, some of the case pieces are joined by flanges, and packing is interposed between the flanges In the heating device, a folded portion is provided in the vicinity of an outer peripheral end or an inner peripheral end of the flange, a protruding portion that protrudes from the flange is provided in the packing, and a cut or hole is provided in the protruding portion so that the cut or The heating device is characterized in that the hole is engaged with the folded portion.

In the heating device of the present invention, the folded portion is provided near the outer peripheral end or the inner peripheral end of the flange. Therefore, in the heating device of the present invention, when the packing is temporarily fixed, the packing can be arranged along the folded portion, and the temporary fixing of the packing can be easily performed. Further, in the heating device of the present invention, the packing is provided with a protruding portion protruding from the flange, and the protruding portion is provided with a cut or hole, and the cut or hole is engaged with the folded portion. Therefore, in the heating device of the present invention, there is no need to provide an adhesive layer on the packing, and the packing can be temporarily fixed without using adhesion. Therefore, in the heating device of the present invention,
There is no need to peel off the release paper, and the work environment is improved because glass fibers and the like do not scatter. Also, since it does not have an adhesive layer, there is no generation of off-flavor due to burning.
Furthermore, since the packing and the flange side are temporarily fixed by a mechanical engagement relationship, it is easy to separate them when discarding.

According to a third aspect of the present invention for solving the same problem, there is provided at least a heat source unit for generating heat and a heat exchanging unit, which are housed in a case sharing a space. The case is composed of a plurality of case pieces, some of the case pieces are joined by flanges, and in a heating device in which packing is interposed between the flanges, a folded portion is provided at the outer peripheral end of the flanges and A cut-out portion is provided in a part of the folded portion, and the packing has a protrusion corresponding to the cut-out portion and a protrusion protruding from the flange over a range larger than the length of the cut-out portion. The heating device is characterized in that a cut is provided at an end and the cut engages with the cutout.

In the heating device of the present invention, a folded portion is provided at the outer peripheral end of the flange. Therefore, in the heating device of the present invention, when the packing is temporarily fixed, the packing can be arranged along the folded portion, and the temporary fixing of the packing can be easily performed. In the heating device of the present invention,
A cutout portion is provided in a part of the folded portion. The packing is provided with a protruding part that protrudes from the flange over a range larger than the length of the notch at the part corresponding to the notch, and a cut is provided at the end of the protruding part. Engage with the notch. Therefore, the heating device of the present invention does not require the provision of an adhesive layer on the packing as in the previous invention, and can temporarily fix the packing without relying on adhesion, thereby improving the working environment without scattering glass fibers and the like. There is no generation of offensive odor due to burning of the adhesive layer. Further, the packing is easily separated at the time of disposal. Furthermore, in the heating device of the present invention, when the packing is properly mounted, a part of the packing is exposed to the outside from the cutout portion of the folded portion of the flange. Therefore, in the heating device of the present invention, it can be checked at a glance whether or not the packing is properly mounted.

According to a fourth aspect of the present invention, there is provided a heating device in which a gas burner for generating a flame is accommodated in a predetermined case, which constitutes a part of a wall surface of the case. Along with a flange and a packing, attached to the main body of the case, has a detachable wall that can be removed independently, in a heating device attached with a nozzle that supplies gas to the gas burner on the inner surface of the detached wall, An engaging portion is provided in the vicinity of the outer peripheral end or the inner peripheral end of the flange, and the packing is provided with a protruding portion protruding from the flange, and a portion of the protruding portion or a portion near the boundary between the protruding portion and the other portion. Is a heating device that engages with the engaging portion.

The heating device according to the present invention has a configuration similar to the above-described configuration applied to the nozzle portion. That is, the heating device of the present invention has a detachable wall that can be detached independently, and a nozzle that supplies gas to the gas burner is attached to the inner surface of the detached wall. The removal wall forms a part of the wall surface of the case, and is attached to the main body of the case via a flange and packing. In the heating device of the present invention, the engagement portion is provided near the outer peripheral end or the inner peripheral end of the flange. On the other hand, the packing has a protruding portion protruding from the flange. In the heating device of the present invention, a part of the protruding portion of the packing or a portion near the boundary between the protruding portion and the other portion is engaged with the engaging portion on the flange side. In the heating device of the present invention, there is no need to provide an adhesive layer on the packing, and the packing is temporarily fixed without using adhesion. Therefore, in the heating device of the present invention, it is not necessary to peel off the release paper, and the glass fiber or the like does not scatter, so that the working environment is improved. Also, since it does not have an adhesive layer, there is no generation of off-flavor due to burning. Furthermore, since the packing and the flange side are temporarily fixed by a mechanical engagement relationship, it is easy to separate them when discarding.

[0029]

Embodiments of the present invention will be described below. In the following embodiments, the same components as those of the above-described conventional water heater are denoted by the same reference numerals, and redundant description will be omitted. FIG. 1 is a structural conceptual view of a water heater according to the present invention and the prior art. FIG. 2 is a conceptual diagram of a structure in which the water heater of FIG. 1 is divided into blocks. FIG.
FIG. 2 is an exploded perspective view of the water heater of the present embodiment. FIG.
It is a disassembled perspective view showing the flange and packing of the burner part of the water heater of this invention. FIG. 5 is a perspective view showing a state in which a protruding portion of the packing is engaged with a cutout portion provided in a folded portion of the flange. FIG. 6 is a perspective view of a removal wall of a water heater according to another embodiment of the present invention. Figures 7, 8, 9
FIG. 7 is a perspective view showing a state in which a protruding portion of a packing is engaged with a notch provided in a folded portion of a flange in another embodiment of the present invention.

The basic configuration of the water heater 1 of the present embodiment is the same as that of the conventional water heater 100, and is divided into three blocks such as a burner section 7, a heat exchange section 8, and a smoke exhaust section 9. I have. The content of each block is also the same as that of the prior art. The burner section (heat source section) 7 is formed by integrating a case piece 10 corresponding to the lower end of the case 4 and the burner 2, and the heat exchange section 8 The case piece 11 and the heat exchanger 3 that constitute the intermediate portion are integrated, the smoke exhaust section 9 is the case piece 12 that constitutes the upper end side, and the smoke exhaust port 13 is provided.

The connecting portions of the case pieces 10, 11, 12 are provided with flanges 15a, 15b,
16a, 16b are provided, and each case piece 10, 1
The flanges 1 and 12 are flanged together with packings 43 and 44 interposed therebetween. Flange 1 used in this embodiment
Although the shapes and structures of 5a, 15b, 16a and 16b are common to those of the prior art in many respects, of the four flanges described above, a flange 15a at the top of the burner portion 7 having the folded portions 37 and 38, Flange 16b below smoke exhaust section 9
Is different from the prior art in that a cutout portion (engaging portion) 40 is provided in a part of the folded portions 37 and 38.

That is, in the water heater 1 of this embodiment, FIG.
As described above, a flange 15a is provided at the upper end of the case piece 10 constituting the burner portion 2. And the flange 1
The outer peripheral end of 5a is folded vertically upward over substantially the entire circumference. However, the folded portion 37 is cut off at the center of each side. The length of the cutout portion 40 is generally about 10 mm to 30 mm. Note that, in FIG. 4, the folded portion 37 is also missing at the corner portion. The missing portion is provided for the necessity of bending, but the missing portion of the portion may be made to function as a notch, and the protrusion of the packing may be engaged with the portion. The configuration in which the protruding portion is engaged with the corner portion is effective especially when the length of the side of the flange is short.

Although the illustration of the flange 16b of the smoke exhaust section 9 is omitted, the shape and structure are the same as those of the flange 15b.
It is completely the same as a, and the outer peripheral end is bent vertically downward over substantially the entire circumference, and a notch is provided at the center of each side.

On the other hand, since the packings 43 and 44 have the same shape, the packing 43 will be described as an example. The materials of the packings 43 and 44 are mainly made of glass fiber as in the case of the conventional technology.
It is formed in a rectangular ring shape so as to conform to the shapes of the flanges 15a, 16b of 0,11. And packing 4
In the structure of No. 3, it should be noted that a protruding portion 45 is provided. The protruding portion 45 is located at the center of each side in the present embodiment, and protrudes outward.

The position of the protruding portion 45 is in the center of each side as described above, and coincides with the position of the notch 40 of the flange 15a. However, the length of the protruding portion 45 is about 20% to 50% longer than that of the notch portion 40. The width of the protruding portion 45 is about 2 mm to 10 mm. Or cuts 4 at both ends of the base of the protruding part 45
6 are provided. The length of the cut 46 is designed such that the length of the uncut portion matches the length of the cutout portion 40 of the cutback portion 37. In the present embodiment, the cuts 46 are on both sides of the base of the protruding portion 45 and have the same length. However, the left and right lengths of the cut 46 may be different between the left and right, and the cut may be provided on only one side of the root. However, in any case, it is desirable that the position of the remaining portion of the protruding portion 45 coincides with the notch portion 40, and that the length thereof coincides with the length of the notch portion 40.

In FIG. 4, a hole 48 provided in the packing 43 is a screw through hole for screwing the flanges 15a and 15b. Packing 4 used in this embodiment
No. 3,44 does not have an adhesive layer.

When assembling the water heater 1 of the present embodiment, the packings 43 and 44 are previously attached to the case piece 10 of the burner section 7 and the flange 15a, 1 of the case piece 12 of the smoke exhaust section 9.
6b. In other words, the packing 43,
44 is arranged. Here, the protruding portions 45 of the packings 43 and 44 are pushed into the notches 40 as shown in FIG. Then, the folded portion 37 near the cutout portion 40 is sandwiched between the cutouts 46 of the packings 43 and 44, and the protrusion portion 45 and the cutout portion 40 are engaged.
Here, the protruding portions 45 of the packings 43 and 44 and the cutout portions 40 of the flanges 15a and 16a are provided one for each side, so that all the protruding portions 45 and the cutout portions 40 are engaged. , Packing 43,44
Is inevitably temporarily fixed at predetermined positions of the flanges 15a and 16a.

The subsequent steps are the same as those in the prior art.
5a, 15b and flanges 16a, 16b are joined. Here, in the water heater 1 of the present embodiment, the protruding portions 45 of the packings 43, 44 are exposed to the outside even when the case pieces 10, 11, 12 are integrally assembled. Therefore, in the water heater 1 of the present embodiment, the packing 4
It can be checked from the outside whether or not 3, 44 is mounted in a proper position.

The above description is based on the burner 7 of the water heater 1,
As a configuration for joining the heat exchange section 8 and the smoke exhaust section 9, an example is shown in which a notch section 40 is provided in the folded section 37 of the flanges 15a and 16b, and a protruding section 45 is provided in the packings 43 and 44. A similar configuration can be adopted for other joining portions of the container 1. That is, in the water heater 1 of the present embodiment, the burner section 7 is divided into blocks of the main body section 20 and the front pipe section 21, and the same configuration as the above-described configuration is adopted for this section. . Specifically, the flange 27a is provided with a folded portion 39 (FIG. 2), and the folded portion 39 is provided with a notch (not shown). The corresponding flange 27b has a flat shape. The packing 30 is provided with a protruding portion and a cut similar to those in the above-described example, and the protruding portion engages with the cutout portion of the flange 27a.

The smoke exhaust tube 6 is attached to the case piece 12 of the smoke exhaust section 9 as described above, and the same configuration as that described above is employed for attaching the smoke exhaust tube 6. That is, the folded portion 34 is provided on the flange 31a of the case piece 12 as shown in FIG. 1, and the notched portion is provided in the folded portion 34 (not shown). Flange 3 for
1b is a flat shape. The packing 33 is provided with a protruding portion and a cut similar to those in the above-described example, and the protruding portion engages with the cutout portion of the flange 31a.

Next, another embodiment of the present invention will be described with reference to FIG. The embodiment described below shows an example in which the present invention is applied to a front pipe portion of a burner portion. That is, FIG. 6 shows a front tube section 50 to which the present invention is applied, which is connected to a main body of a burner section (not shown). The front tube part 50
The burner has a detachable wall 51 which forms a part of the wall surface of the case piece. The inner surface of the detachable wall 51 protrudes as shown in FIG. More specifically, the upper end is slightly protruded to form a flat surface 53. The flat surface is provided with four nozzles 54.

The lower end portion protrudes more greatly, and this portion is also a flat surface 55. The upper flat surface 53 and the lower flat surface 55 are connected by a curved surface.

In the front tube portion 50 employed in the present embodiment, the upper side 57 and the side 58 on the inner surface of the detachable wall 51 function as a U-shaped flange 59.
The lower flat portion 55 also functions as a flange.

As a configuration unique to this embodiment, an engaging portion 60 is provided inside the upper side portion 57 of the detachable wall 51 as a flange. The engaging portion 60 is provided at the above-mentioned protruding portion, and has an inverted trapezoidal shape. The front tube portion 50 is formed by a die casting method or the like, and the engaging portion 60 is formed at the time of die casting. Further, a side portion 58 of the detaching wall 51 serving as a flange 59, and a portion from the inside of the lower portion,
Is provided. The other long holes 65 provided in the flange 59 are holes that are utilized when screwing the front tube portion 50.

On the other hand, the packing 61 attached to the relevant site
Is formed in a U-shape in advance, and an inverted trapezoidal protruding portion 62 is provided at the center inside the center side. Further, notches 67 are provided inside the both end portions. The other holes 68 are holes that are utilized when the front tube 50 is screwed.

The above-mentioned “U” shaped packing 61 is
It is attached to the flange 59 prior to the attachment of the front tube part 50. The inverted trapezoidal protruding portion 62 of the packing 61 engages with the engaging portion 60 provided near the inner peripheral end of the flange 59, and the packing 61 is temporarily fixed.

On the other hand, a band-shaped packing 70 is mounted on the flat portion 55 on the lower side, which is another flange of the removal wall 51, by bending it into a U-shape as shown in FIG. The lower flat portion (flange) 55 is provided with an engaging portion near the outer peripheral end. On the other hand, the packing 70 is divided into a band-shaped main body portion and protrusion portions 75, 76, 77 having an additional shape. The main body portion has a shape in which the width of the central portion 71 is narrow and the width of both end portions 72 is wide, and both are connected by a straight line. Alternatively, the protruding portions 75, 76, and 77 are provided at three places, and one protruding portion 75 is formed at the lower center. The protruding portion 75 has a rectangular shape, and a rectangular long hole 78 is provided at the center. The remaining two protruding portions 76 and 77 are provided on both side surfaces of the main body. The protruding portions 76 and 77 have a right-angled trapezoidal shape, and the upper end is inclined downward toward the main body.

The above-mentioned band-shaped packing 70 is connected to the front pipe 5
Prior to the mounting of No. 0, it is mounted on the flat portion 55 as a flange. That is, the central portion 71 of the packing 70 is in contact with the flat portion 55, and the long hole 78 of the protruding portion 75 is provided with the engaging portion 8 provided near the outer peripheral end of the flat portion (flange) 55.
8 is engaged. The both ends 72 of the packing 70 abut against the side surfaces of the flat portion 55, and the protrusions 76, 77 at both ends.
Engages with a hole 63 provided in the side portion 58 of the removal wall 51.

In the embodiment described above, examples of the protruding portion include a configuration having cuts 46 at both ends of a rectangular portion as shown in FIG. 5 and an inverted trapezoidal shape as shown in FIG. However, of course, the present invention is not limited to these shapes.

For example, as shown in FIG.
A cut 81 may be provided in the center of the root of the protruding portion 80 of No. 3 and the notch 82 of the flange 15a may have a folded portion (engaging portion) 83 at the center.
In the present embodiment, the folded portion 83 at the center portion engages with the cut 81 of the protruding portion 80. When this configuration is employed, it is desirable that the length of the protruding portion 80 be equal to the length of the cutout portion.

Further, as shown in FIG.
A notch 84 may be provided at the center of the flange, and the notch 85 of the flange may extend horizontally and then bend at the center of the end. In the present embodiment, the folded portion (engaging portion) 86 at the center portion is formed by the cutout 84 of the protruding portion.
Engage with. Conversely, as shown in FIG.
A configuration in which the engaging portion 87 is provided at a portion inside the area surrounded by 7 is also possible. When this configuration is adopted, it is not necessary to provide the packing 43 with a protruding portion. In addition, holes may be provided instead of the cuts 81 and 84 described above. In the above embodiments, the configuration of the heating apparatus of the present invention has been described by taking a water heater having a single heat exchanger as an example, but the present invention has a water heater having a plurality of heat exchangers therein. Can also be adopted. In a water heater with a plurality of heat exchangers inside, the heat exchange part is often divided by a partition plate, but the burner or smoke exhaust is common, and the burner or smoke exhaust is common. The space is shared by. Further, the present invention is also applicable to a bath apparatus that only performs reheating of a bath.

[0052]

In the heating device according to any one of claims 1 to 4,
There is no need to provide an adhesive layer on the packing, and since the packing is temporarily fixed without using adhesion, there is no need to peel off the release paper, and glass fibers and the like do not scatter, so that the working environment is improved. Moreover, since the heating device of the present invention does not have the adhesive layer, there is no generation of an odor due to burning. Further, in the heating device of the present invention, since the packing and the flange side are temporarily fixed by a mechanical engagement relationship, there is an excellent effect that separation of both at the time of disposal is easy.

In the heating apparatus according to the third aspect,
In a state where the packing is properly mounted, a part of the packing is exposed to the outside from the cutout of the folded portion of the flange. Therefore, in the heating device of the present invention, it can be checked at a glance whether the packing is properly mounted or not,
This has the effect of reducing the defective rate.

[Brief description of the drawings]

FIG. 1 is a structural conceptual view of a water heater according to the present invention and a prior art.

FIG. 2 is a conceptual diagram of a structure in which the water heater of FIG. 1 is divided into blocks.

FIG. 3 is an exploded perspective view of the water heater of the present embodiment.

FIG. 4 is an exploded perspective view showing a flange and a packing of a burner portion of the water heater of the present invention.

FIG. 5 is a perspective view showing a state in which a protruding portion of the packing is engaged with a notch provided in a folded portion of the flange.

FIG. 6 is a perspective view of a removal wall of a water heater according to another embodiment of the present invention.

FIG. 7 is a perspective view showing a state in which a protruding portion of a packing is engaged with a notch provided in a folded portion of a flange according to another embodiment of the present invention.

FIG. 8 is a perspective view showing a state in which a protruding portion of a packing is engaged with a notch provided in a folded portion of a flange in another embodiment of the present invention.

FIG. 9 is a perspective view showing a state in which a protruding portion of a packing is engaged with a notch provided in a folded portion of a flange in another embodiment of the present invention.

FIG. 10 is an overall perspective view and an enlarged sectional perspective view of a packing employed in a conventional water heater.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hot-water supply device 4 Case 7 Burner part (heat source part) 8 Heat exchange part 9 Smoke exhaust part 10, 11, 12 Case pieces 15a, 15b, 16a, 16b Flange 21 Front pipe part 37, 38 Folding part 40 Notch part 43, 44 Packing 45 Protruding part 46 Cut 51 Removal wall 54 Nozzle 60 Engaging part 61 Packing 67 Notch 70 Packing 83 Folding part (engaging part) 86 Folding part (engaging part)

Claims (4)

[Claims] At least a heat source part for generating heat and a heat exchange part are housed in a case sharing a space, and the case is composed of a plurality of case pieces, and some of the case pieces are flanged. And a packing is interposed between the flanges, wherein the flange is provided with an engaging portion, and a part of the packing is engaged with the engaging portion. 2. At least a heat source section for generating heat and a heat exchange section are housed in a case sharing a space, and the case is composed of a plurality of case pieces, and some of the case pieces are flanged. In the heating device joined by the packing and the packing is interposed between the flanges, a folded portion is provided near the outer peripheral end or the inner peripheral end of the flange, and the packing is provided with a protruding portion that protrudes from the flange. A heating device, wherein a cut or a hole is provided in the protruding portion, and the cut or the hole is engaged with the folded portion. 3. At least a heat source part for generating heat and a heat exchange part are housed in a case sharing a space, and the case is composed of a plurality of case pieces, and some of the case pieces are flanged. In a heating device joined by a packing and a packing is interposed between the flanges, a folded portion is provided at an outer peripheral end of the flange, and a cutout portion is provided at a part of the folded portion. A protruding portion that protrudes from the flange over a range larger than the length of the notch portion is provided in a portion corresponding to the notch portion, a cut is provided at an end of the protruding portion, and the cut is a cut portion. A heating device for engaging. 4. A heating device in which a gas burner for generating a flame is housed in a predetermined case, which constitutes a part of a wall surface of the case, and is attached to a main body portion of the case via a flange and a packing. In a heating device having a detachable wall that can be detached alone and having a nozzle for supplying gas to a gas burner attached to an inner surface of the detached wall, an engaging portion is provided near an outer peripheral end or an inner peripheral end of the flange. The heating device is provided, wherein the packing is provided with a protruding portion protruding from the flange, and a portion of the protruding portion or a portion near the boundary between the protruding portion and the other portion is engaged with the engaging portion. .