JPH0728524Y2 - Combustion device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a combustion device such as an instantaneous water heater and its reinforcing member.

(Prior Art) A conventional combustion apparatus including a casing in which a heat exchange cylinder and a burner case are integrally stacked and connected to each other by projecting flanges integrally protruding from the peripheral edges of these ends is disclosed in, for example, Japanese Utility Model Publication No. 59-67744. known.

(Problems to be solved by the invention) However, this one requires fastening both flanges with screws at multiple places, and since tightening is difficult to automate, it has to be done manually, which is troublesome. There is a problem. Therefore, in order to automate the work as much as possible, it is conceivable to tighten these by caulking, but since the heat exchange cylinder is formed using a copper plate with good thermal conductivity, it is easily distorted, and it protrudes integrally from this. It is difficult to obtain a reliable tightening connection even if the flange to be attached is caulked to the flange provided on the burner case or exhaust cap.

Therefore, an object of the present invention is to obtain a combustion apparatus including a casing tightly connected by tightening, which can be easily automated by utilizing a reinforcing member provided to reinforce the flange protruding from the heat exchange cylinder. .

(Means for Solving the Problem) In order to achieve the above object, the present invention provides a combustion apparatus according to claim 1, wherein a heat exchange cylinder and a burner case or an exhaust cap are integrally projected from the peripheral edges of these ends. What is claimed is: 1. A heat sink comprising a casing formed by stacking and connecting flanges, wherein a bending piece projecting from the outer peripheral edge of the flange provided on the burner case or the exhaust cap to the heat exchange cylinder side is provided, and the heat exchange is performed. A reinforcing member is provided along the flange protruding from the case, and an engaging protrusion for bending and locking the bending piece is provided at the outer end of the reinforcing member, and the heat exchange case and the burner case or the exhaust cap are caulked. Stop it.

A combustion apparatus according to a second aspect of the present invention is the combustion apparatus according to the first aspect, further comprising a space on the upper surface of the reinforcing member, the front end side of which enters when the bending piece is bent and locked to the engaging projection.

The burner according to claim 3 is provided with a casing formed by connecting a heat exchange cylinder and a burner case or an exhaust cap by overlapping respective flanges projecting integrally from the peripheral edges of these ends. An engaging portion projecting from the outer peripheral edge of the flange provided on the exhaust cap to the side opposite to the heat exchange cylinder is provided, and a reinforcing member is provided along the flange projecting from the heat exchange cylinder. An engaging projection is provided on the outer end of the heat exchanging cylinder, and the burner case or the exhaust cap is caulked by separate caulking pieces that engage the engaging portion and the engaging projection.

The combustion apparatus according to claim 4 is the combustion apparatus according to claim 1 or 2, wherein when the bending piece is bent and locked to the engaging protrusion, the bending piece abuts and polymerizes, and the polymerization extends in the width direction of the reinforcing member. A projecting piece is provided at the tip of the engaging projection.

A combustion apparatus according to claim 5 is the combustion apparatus according to claim 1 or 2, wherein the reinforcing member includes a flat plate portion that overlaps a flange protruding from the heat exchange cylinder, and the bending piece includes:
When this is bent and locked to the engaging projection, its tip has a length such that it comes into contact with the flat plate portion.

A combustion apparatus according to a sixth aspect of the present invention is the combustion apparatus according to the third aspect, wherein the overlapping protrusion extending in the width direction of the reinforcing member with which the caulking piece abuts and overlaps is provided at the tip of the engaging protrusion.

The combustion apparatus according to claim 7, further comprising a housing formed by connecting the heat exchange cylinder and the burner case or the exhaust cap by overlapping respective flanges integrally projecting from the peripheral edges of these ends. A bending piece protruding from the outer peripheral edge of the flange provided on the burner case or the exhaust cap to the heat exchange cylinder side is provided, and a reinforcing member is provided along the flange protruding from the heat exchange cylinder, and the upper end of the reinforcing member is provided. When the bending piece is bent and locked, a stacking projection piece which is substantially parallel to a flange for receiving the bending piece is provided, and the heat exchange cylinder and the burner case or the exhaust cap are caulked.

(Operation) In the combustion apparatus according to claim 1 having the above configuration,
The bending piece provided on the burner case or the exhaust cap is bent and locked to the engaging protrusion of the reinforcing member along the flange protruding from the heat exchange cylinder, and the heat exchange cylinder and the burner case or the exhaust cap are caulked. You can stop.

Further, in the combustion apparatus according to the second aspect, the bending piece can be deeply bent so that so-called springback does not occur, and the caulking can be more reliably prevented.

Further, in the combustion apparatus according to claim 3, even if the burner case or the exhaust cap is made of aluminum die-casting or the like and a flange protruding from this cannot form a bending piece, these are Can be crimped.

Further, in the combustion device according to claims 4 to 7, when caulking is stopped, it is possible to easily prevent the inner end side of the reinforcing member from being lifted up and becoming free.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings.

The heat exchange cylinder 1 is formed of a copper plate to increase the heat exchange rate,
A flange 4 that overlaps a flange 3 on the lower end of the exhaust cap 2 overlaps the upper end of the flange, and a flange 7 that overlaps the flange 6 on the upper end of the burner case 5 on the lower end. 4 and 6, 7
The housing A is obtained by coupling the two. The burner case 5 and the exhaust cap 2 are made of aluminum die-cast, which is less likely to be distorted than a copper plate, or made of sheet metal of an aluminum-treated steel plate.

In the embodiment shown in FIGS. 1 to 5, in such an embodiment, an engaging projection 8 is provided at the outer end along the flanges 4 and 7 which integrally project from the heat exchange cylinder 1. A reinforcing member 9 is provided, and a bending piece 11 that bends from the outer ends of the flanges 3 and 6 provided on the exhaust cap 2 and the burner case 5 to the heat exchanger shell 1 side is provided. The reinforcing member 9 is formed by bending a stainless steel plate and bending it into a flat plate portion 9a along the lower surface of the flange 4 and the upper surface of the flange 7 as shown in FIG. And the protrusions bent from the inner and outer ends thereof are formed to have a U-shaped cross section to be robust, and the protrusion at the outer end is the engaging protrusion 8. In this embodiment, the engaging projection 8
Is continuous with the outer peripheral edge, but it may be discontinuous in some cases, and in some cases, the inner edge rim can be omitted.

In this embodiment, in order to facilitate the assembling of the reinforcing member 9 to the heat exchanging cylinder 1, the reinforcing member 9 is connected to the front half 9A extending from the front surface of the heat exchanging cylinder 1 to the both side half thereof and the heat exchanging cylinder 1. It is divided into a rear half 9B extending from the back to both sides of the half. In addition, in this embodiment, the cut-and-raised piece 10 is formed so as to extend around the end caps of the exhaust cap 2 and the burner case 5, and the upper portion of the cut-and-raised piece 10 is cut out at a predetermined interval to leave the remaining portion. The bending piece 11 is bent so that the bending piece 11 is inclined toward the inner ends of the flanges 4 and 7 and is locked to the engaging projection 8. However, as shown in FIG. 12, it can be bent approximately 180 degrees to secure the locking without springback.

In the above-described embodiment, when the bending piece 11 is bent by the engaging projection 8, a force is applied to the upper end of the engaging projection 8 and the inner end side of the reinforcing member 9 may float up. Therefore, the reinforcing member 9 can be spot-welded to the flanges 4 and 7 to prevent it, but since the heat exchange cylinder 1 is formed of a copper plate, it is likely to be deformed, and it is difficult to sufficiently suppress this rise.

Therefore, in the structure shown in FIGS. 6 to 9, a stacking protrusion 12 is provided at the tip of the engaging protrusion 8 on which the bent segment 11 abuts and polymerizes. With the contacting, the force exerted only on the outer end side during crimping and the inner end side was prevented from floating.

In this case, the polymerized protrusion 12 is a bent piece 11 as shown in FIG.
It may be bent together or may be pre-configured as shown in FIG.

Further, as shown in FIG. 13, the reinforcing member 9 is provided with a flat plate portion 9a which overlaps the flanges 4 and 7 protruding from the heat exchange cylinder 1, and is bent into the bending piece 11 and the engaging projection 8. Even if the bending portion 11 has a length that abuts the inner end side of the flat plate portion 9a of the bending piece 11 and the tip 11a of the bending piece 11 presses the flat plate portion 9a of the reinforcing member 9, At this time, it is possible to prevent a force from being applied only to the outer end side of the reinforcing member 9 so that the flat plate portion 9a side floats. Further, as shown in FIGS. 14 to 17, when the bending piece 11 is bent and locked on the outer side of the reinforcing member 9, a superimposing projection piece 12 is provided substantially parallel to the flanges 4 and 7 for receiving the bending piece 11, and the heat exchange is performed. Even if the body 9, the burner case 5 and the exhaust cap 2 are caulked, it is possible to solve the problem that a force is applied only to the outer end side of the reinforcing member 9 during processing.

Incidentally, the reinforcing member 9 may be provided with a projecting edge at the inner end of
It may be omitted as shown in the drawing, or the one formed in a U shape may be attached so as to face the flange 4 and the flange 7 as shown in FIGS. 15 to 17.

In the embodiment shown in FIGS. 1 to 5, for example, since the flange 6 protruding from the burner case 5 has a gutter shape, this can be utilized as a drain receiver generated outside the heat exchange cylinder 1.

FIG. 18 shows still another embodiment, which is the inner end projection 9b of the reinforcing member 9.
When the bending piece 11 is bent and locked by the engaging projection 8, the tip 11 of the bending piece 11 is provided at the tip of the
The a and the overlapping protrusion 12 contact the receiving portion 9c, and the contact of the bending piece 11 with the overlapping protrusion 12 prevents the floating of the reinforcing member 9 on the inner end side. However, this may be such that only the tip 11a of the bending piece 11 or only the tip 12a of the overlapping projection 12 directly presses the receiving portion 9c.

In the above-described embodiment, the bending piece 11 for crimping is formed integrally with the flanges 3 and 6 provided on the burner case or the exhaust cap 2, but as shown in FIG. 19, it is provided on the burner case and the exhaust cap 2. A crimping piece 15 is provided with a continuous or discontinuous engaging portion 13 protruding from the outer peripheral edge of the flanges 3 and 6 to the side opposite to the heat exchange cylinder 1, and one end 14 of which is engaged with the engaging portion 13. The bending piece 11 provided at the other end can be crimped to the engaging projection 8 or the overlapping projection 12 of the reinforcing member 9 as in the previous example.

This is particularly effective when the burner case and the exhaust cap 2 are made of aluminum die cast and the bending piece 11 cannot be formed integrally with this.

In the above description, the case A including the burner case 5, the heat exchange cylinder 1, and the exhaust cap 2 has been described.
Some simple instant water heaters do not have the exhaust cap 2.

Further, the burner case 5 is provided with a flame detector 16 such as a frame rod which penetrates the burner case 5 and the detection portion faces the interior of the burner case 5. As shown in FIG. 4, a burring portion 18 is provided to prevent the drain generated on the inner surface of the heat exchange cylinder 1 from flowing into the flame detector 16 side by the burring portion 18. Reference numeral 19 denotes packing.

FIG. 20 shows a state at the time of caulking, and as described above, there is a possibility that the inner end side of the reinforcing member 9 floats when the caulking is clamped. Therefore, as shown in the same figure, when performing the crimping by clamping from the XY direction, the flat plate portion 9a of the reinforcing member 9 is attached to the upper end of the locking projection 8 provided on the reinforcing member 9 to facilitate the clamping. By providing a protrusion 20 that protrudes in parallel with, it is easy to clamp and also prevents lifting.

(Effects of the Invention) Since the present invention is configured as described above, it has the following effects.

In the combustion apparatus according to claim 1, since the heat exchange cylinder and the exhaust cap or the burner case can be tightened and connected by crimping, it can be automated relatively easily compared with the conventional screw-fastening type, and the heat exchange can be performed. The burner case or the exhaust cap is caulked to the heat exchange cylinder by utilizing the reinforcing member that reinforces the flange of the case, so that a simple and robust tightening connection can be performed. The bending of the bent piece can be deepened to surely prevent the crimping. In the combustion device according to the third aspect, even if the bent piece cannot be formed on the burner case or the exhaust cap, the crimping can be stopped.

Further, in the combustion apparatus according to any one of claims 4 to 7, when the caulking is performed, the inner end side of the reinforcing member is pressed against the flange protruding from the heat exchange cylinder so as not to float, and Keep good contact with the flange,
This can eliminate the possibility that the function of the reinforcing member will be impaired.

[Brief description of drawings]

1 shows a side view, FIG. 2 is an enlarged cross-sectional view of a part thereof, FIG. 3 is a state diagram before connection, and FIG. 4 is a second view. Fig. 5 is a sectional view taken along the line IV-IV of Fig. 5, Fig. 5 is an exploded perspective view, Fig. 6 is a partial sectional view of another embodiment, Fig. 7 is a state diagram before the connection, and Fig. 8 is an exploded view. Slope view, FIG. 9 is an enlarged view of a part of FIG. 6, FIG. 10 and FIG.
FIG. 12 is a state diagram before the connection, FIG. 12 to FIG. 19 are enlarged cross-sectional views of main parts showing still another embodiment, and FIG. 20 is an explanatory diagram for explaining a clamped state at the time of caulking. 1 ... Heat exchange cylinder, 2 ... Exhaust cap 3 ... Flange, 4 ... Flange 5 ... Burner case, 6 ... Flange 7 ... Flange, 8 ... Engaging projection 9 ... Reinforcing member, 10 ... … Cut and raised piece 11 …… Bent piece

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takeshi Iwata 2-26 Fukuzumicho, Nakagawa-ku, Nagoya, Aichi Prefecture, Rinnai Co., Ltd. (56) References: 1-112362 (JP, U)

Claims (7)

[Scope of utility model registration request] 1. A housing comprising a heat exchange cylinder and a burner case or an exhaust cap, the flanges integrally protruding from the peripheral edges of these ends being overlapped and connected.
A bending piece protruding from the outer peripheral edge of a flange provided on the burner case or the exhaust cap to the heat exchange cylinder side is provided, and a reinforcing member is provided along the flange protruding from the heat exchange cylinder. A combustion device in which an engaging protrusion for bending and locking the bent piece is provided at an outer end, and the heat exchange cylinder and the burner case or the exhaust cap are caulked. 2. The combustion apparatus according to claim 1, wherein the reinforcing member has an upper surface provided with a space into which a front end side of the bending piece is inserted when the bending piece is bent and locked to the engaging projection. 3. A burner case or an exhaust cap, comprising a housing in which a heat exchange cylinder and a burner case or an exhaust cap are connected by overlapping respective flanges projecting integrally from their end peripheral edges. An engaging portion protruding from the outer peripheral edge of the flange provided on the side opposite to the heat exchange cylinder,
Further, a reinforcing member is provided along the flange protruding from the heat exchange cylinder, an engaging projection is provided on an outer end of the reinforcing member, and a separate caulking piece that engages with the engaging portion and the engaging projection. And a combustion device formed by caulking the heat exchange cylinder and the burner case or the exhaust cap. 4. The overlapping protrusion extending in the width direction of a reinforcing member, which abuts and abuts the bent piece when the bent piece is bent and locked to the engaging projection, is provided at the tip of the engaging projection. Item 1
Or the combustion device according to 2. 5. The reinforcing member is provided with a flat plate portion that overlaps a flange protruding from the heat exchange cylinder, and when the bending piece is bent and locked to the engaging projection, the tip thereof is the flat plate. 3. The structure according to claim 1 or 2, which has a length for contacting the portion.
Combustion device as described. 6. The combustion device according to claim 3, wherein a superposing projection piece extending in the width direction of the reinforcing member with which the caulking piece abuts and superposes is provided at the tip of the engaging projection. 7. A housing provided with a heat exchange cylinder and a burner case or an exhaust cap, the flanges integrally projecting from the peripheral edges of these ends being overlapped and connected.
A bending piece protruding from the outer peripheral edge of a flange provided on the burner case or the exhaust cap to the heat exchange cylinder side is provided, and a reinforcing member is provided along the flange protruding from the heat exchange cylinder. A combustion device, wherein an upper end is provided with a stacking protrusion that is substantially parallel to a flange that receives the bent piece when the bent piece is locked, and the heat exchange cylinder and the burner case or the exhaust cap are caulked.