JP6872166B2 - Burner unit and burner device equipped with it - Google Patents

Description

The present invention relates to, for example, a burner unit suitable for use as a component of a gas water heater, and a burner device including the burner unit.

Specific examples of the burner device include those described in Patent Documents 1 and 2.
In the burner device described in these documents, the burner unit is housed in the burner case. In this burner unit, a plurality of burner bodies (combustion pipes) are arranged side by side and assembled and held in a holder. The holder includes a base member provided with an upright front wall portion at the front portion of the bottom wall portion on which a plurality of burner main bodies are mounted, and a three-sided frame-shaped frame-shaped member attached to the base member. The frame-shaped member and the front wall portion of the base member surround and position the periphery of the plurality of burner bodies.
According to such a configuration, it is possible to put a plurality of burner main bodies in and out of the burner case at once, and it is possible to improve the workability of assembling the burner device. In particular, when performing maintenance on the burner body, it is possible to take out the burner units all at once to the outside of the burner case, which is convenient.

However, in the above-mentioned prior art, there is still room for improvement as described below.

That is, the holder constituting the burner unit has a structure in which a frame-shaped member is attached to the base member, but conventionally, only a screw fixing means is adopted as the attachment means. Therefore, in order to connect the two securely and firmly, it is necessary to provide a large number of screw fixing points, but in this case, the screw fixing work becomes considerably complicated. Further, when the two are screwed together, it is necessary to properly align them in advance, but in the past, such alignment is not easy. For this reason, conventionally, the workability and productivity in assembling and manufacturing the burner unit are deteriorated, and there is a problem that the cost of the entire burner device is increased.

Jikkenhei 04-25924 Japanese Unexamined Patent Publication No. 2016-125685

The present invention has been conceived under the above-mentioned circumstances, and includes a burner unit capable of improving assembly workability and suitably reducing manufacturing costs, and a burner unit thereof. The challenge is to provide a burner device.

In order to solve the above-mentioned problems, the following technical measures are taken in the present invention.

The burner unit provided by the first aspect of the present invention includes a holder for a burner body for holding a plurality of burner bodies side by side, and this holder has a bottom on which the plurality of burner bodies are mounted. A base member having a wall portion and a front wall portion that stands upward from the front portion of the bottom wall portion and is located on the front side of the plurality of burner bodies, and a base member that is attached to the base member and has the plurality of burner bodies. A burner unit comprising a rear wall portion surrounding the rear side and both left and right sides and a frame-shaped member having a pair of left and right side wall portions, and the frame as a means for attaching the frame-shaped member to the base member. At least one engaging portion that engages at least a part of the shaped member with the base member and a pair of flange portions provided at the front end portions of the pair of side wall portions use screw members to form the front wall portion. The pair of flange portions are provided with a pair of left and right screw fastening portions, and the front end portions of the pair of side wall portions project to the left and right outer sides opposite to the inner region of the pair of side wall portions. The screw head of the screw member is on the rear side of the front wall portion and each flange portion, and the rear wall portion of the frame-shaped member and the pair thereof. It is characterized in that it is set to be located outside the area surrounded by the side wall portion of the.

According to such a configuration, since the base member and the frame-shaped member constituting the holder are engaged with each other via at least one engaging portion, the base member is provided by the amount of the engaging portion provided. There is an advantage that the number of screw-fastening points between the frame-shaped member and the frame-shaped member can be reduced. Further, prior to screwing the base member and the frame-shaped member, it is possible to align the two by using the engaging portion. Therefore, as compared with the prior art, the manufacturing work of the burner unit becomes easier, and the manufacturing cost of the burner unit and, by extension, the burner device using the burner unit can be reduced.
Further, since the screw fastening portion is further provided, it is also appropriate to ensure that the frame-shaped member is firmly attached to the base member and that the engaging state of the engaging portion is inadvertently released. Can be prevented.

In the present invention, preferably, as the engaging portion, a pair of engaging claw portions provided downwardly protruding below the pair of side wall portions and the bottom thereof so as to allow the pair of engaging claw portions to enter. It is provided with a first engaging portion in which a pair of engaging slits provided on the wall portion and a combination thereof are provided.

According to such a configuration, a pair of side wall portions of the frame-shaped member are engaged with the bottom wall portion of the base member by a simple configuration, for example, the frame-shaped member is oriented horizontally with respect to the base member. It is possible to position it so that it does not displace.

In the present invention, preferably, a front opening-shaped recess is formed in each base of the pair of engaging claws, and the recess is formed in the bottom wall portion of each of the engaging slits. The front edge has entered.

According to such a configuration, it is appropriately regulated that each engaging claw portion of the frame-shaped member is displaced in the vertical height direction with respect to the bottom wall portion of the base member, and the mounting state of the frame-shaped member is adjusted. It becomes possible to make it more stable.

In the present invention, preferably, the pair of engaging slits is located near the rear portion of the bottom wall portion, extends in the front-rear direction, and is provided in a form in which the rear portion is open, whereby the pair of engaging slits is provided. The pair of engaging claws can be inserted into the slit from the rear side thereof.

According to such a configuration, the work of inserting the engaging claw portion of the frame-shaped member into the engaging slit portion provided on the bottom wall portion becomes easy, and the assembling workability of the burner unit can be further improved.

In the present invention, preferably, as the engaging portion, an engaging recess is provided in at least one of both the front end portion of the pair of side wall portions and the front wall portion of the base member. A second engaging portion is provided in which the other is engaged in the engaging recess.

According to such a configuration, the front end portion of each side wall portion of the frame-shaped member can be engaged with the front wall portion of the base member by a simple configuration.

In the present invention, preferably, as the engaging recess, the first engaging recess provided at the front end of the pair of side wall portions and having an open front portion, and the front of the base member. It is provided with a second engaging recess having a plan view concave shape provided on the wall portion and having an open rear portion, and the edges of the first and second engaging recesses are engaged with each other. ..

According to such a configuration, it is possible to appropriately regulate that the front end portion of the frame-shaped member is displaced in the vertical height direction and the horizontal width direction with respect to the front wall portion of the base member.

The burner device provided by the second aspect of the present invention is characterized by comprising the burner unit provided by the first aspect of the present invention.

According to such a configuration, the same effect as described for the burner unit 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 invention with reference to the accompanying drawings.

It is a perspective view which shows an example of the burner device which concerns on this invention. FIG. 2 is a sectional view taken along line II-II of FIG. It is an exploded perspective view of the burner device shown in FIG. It is an exploded perspective view of the main part of the burner unit used in the burner device shown in FIG. It is an exploded perspective view of the holder which constitutes the burner unit shown in FIG. It is a side sectional view of the holder shown in FIG. FIG. 6 is an exploded cross-sectional view of FIG. It is a main part perspective view which shows the other example of this invention.

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

The burner device B shown in FIG. 1 is used, for example, as a component of a gas hot water supply device, and a heat exchanger (not shown) through which hot water flows is mounted on the upper side of the burner device B. By driving and burning the burner device B, the hot water fed into the heat exchanger can be heated.
The burner device B includes a burner case 1, a burner unit U housed in the burner case 1, and an auxiliary plate 2 attached to the front surface of the burner case 1.

As is well represented in FIG. 2, the burner case 1 has a substantially rectangular parallelepiped shape having a front opening 10 and a top opening 11. The auxiliary plate 2 is attached to the burner case 1 and the burner unit U by using a plurality of screws 7 so as to close the upper region of the front opening 10. More specifically, the auxiliary plate 2 is attached to the upper front wall portion 12 corresponding to the upper edge portion of the front opening 10 of the burner case 1 and the upper portion of the front wall portion 41 of the base member 4 described later of the burner unit U. It is screwed. A spark plug 8a for driving combustion of the burner device B, a frame rod 8b for flame detection, and the like are attached to the auxiliary plate 2. As a means for realizing screwing of the auxiliary plate 2 using a plurality of screws 7, a plurality of screw insertion holes 70 provided in the auxiliary plate 2 and a burner case 1 are provided as shown in FIG. A plurality of screw holes 71 provided in the upper front wall portion 12 of the above are provided. When the auxiliary plate 2 is removed from the burner case 1 and the burner unit U, the burner unit U can be taken in and out of the burner case 1 from the front through the front opening 10.

The burner unit U is assembled to the holder H in a state where a plurality of burner main bodies 3 (combustion pipes) are arranged side by side. Each burner main body 3 is the same as the conventionally known one described in, for example, Japanese Patent Application Laid-Open No. 2013-242080, and is a type called a so-called shade burner. As is well shown in FIG. 4, each burner main body 3 has a relatively flat shape as a whole, has a fuel gas introduction port 30 at one end (front end), and has a flame hole surface at the upper surface. It is said to be 31.

The details of the holder H of the burner unit U will be described later, but the burner unit U is housed in the burner case 1 in the state shown in FIG. In the figure, a fan 50 and a fuel gas injection head 51 are attached to the lower portion and the front portion of the burner case 1. Of the combustion air supplied from the fan 50 into the burner case 1, the so-called primary air passes through the lower air flow path 59 in the burner case 1 and reaches the air supply port 44 described later, and the combustion gas. It is introduced into the fuel gas introduction port 30 of the burner main body 3 together with the fuel gas injected from the nozzle of the ejection head 51. The bottom wall portion 40 of the holder H, which will be described later, functions as a rectifying plate having a plurality of ventilation holes 40a, and a part of the combustion air (secondary air) supplied from the fan 50 into the burner case 1 is It passes through each ventilation hole 40a and is supplied to the installation area of the burner main body 3.

As shown in FIG. 5, the holder H of the burner unit U is configured by combining the base member 4 and the frame-shaped member 6. Both the base member 4 and the frame-shaped member 6 are formed by pressing a metal plate or the like.
The base member 4 includes a bottom wall portion 40 on which a plurality of burner main bodies 3 are mounted, and a front wall portion 41 that stands up from the front portion of the bottom wall portion 40 and is located on the front side of the plurality of burner main bodies 3. It is equipped. As described above, the bottom wall portion 40 has a plurality of ventilation holes 40a and serves as a rectifying plate for combustion air. The front wall portion 41 is provided with a plurality of air supply ports 44 facing the fuel gas introduction port 30 of the burner main body 3. Further, a substantially horizontal front bending piece portion 41a bent toward the rear is continuously provided at the upper end of the front wall portion 41, and the front end portion of the burner main body 3 is fitted into the front bending piece portion 41a. A plurality of positioning recesses 42 are formed for fixing the positioning.

The frame-shaped member 6 of the holder H has a substantially U-shape in a plan view in which the rear wall portions 60 and the pair of left and right side wall portions 61 arranged on the rear side and the left and right sides of the plurality of burner main bodies 3 are connected. The basic form of the rear wall portion 60 is an upright plate shape extending in the left-right lateral width of the bottom wall portion 40, and the rear end portions of a plurality of burner main bodies 3 are fitted into the upper and lower ends of the rear wall portion 60. A plurality of positioning recesses 62a and 62b are provided for fixing the positioning. The basic form of each of the pair of side wall portions 61 is an upright plate shape extending in the front-rear direction of the bottom wall portion 40.

As shown in FIG. 6, a pair of first and second engaging portions E1 and E2 and a pair of screw fastening portions S are provided as means for attaching the frame-shaped member 6 to the base member 4.

The first engaging portion E1 is an engaging portion in which an engaging claw portion 63 provided in the lower portion of the rear side region of the side wall portion 61 and an engaging slit 45 provided in the bottom wall portion 40 are combined. Yes (see also FIGS. 5 and 7). The engaging claw portion 63 has a downward protruding shape, and a front opening-shaped recess 63a is formed at the base thereof. The engaging slit 45 is located near the rear portion of the bottom wall portion 40 and extends in the front-rear direction, and the rear portion is open. A bent piece portion 40b bent downward is continuously provided at the rear end of the bottom wall portion 40, and the engaging slit 45 is also provided in the bent piece portion 40b.
The rear portion of the engaging slit 45 is opened due to the connection between the two. It is also possible to have a configuration in which the bent piece portion 40b is not provided. In the first engaging portion E1, the engaging claw portion 63 has entered the engaging slit 45, and the front edge portion 45a of the engaging slit 45 of the bottom wall portion 40 has entered the recess 63a. ing.

Based on the above-described configuration of the first engaging portion E1, the rear portion of each side wall portion 61 is displaced in the horizontal width direction, the vertical height direction, and the front of the base member 4 with respect to the base member 4. Positioned so that it does not. Further, in the work of inserting the engaging claw portion 63 into the engaging slit 45, the engaging claw portion 63 may be inserted into the rear opening portion of the engaging slit 45 from behind or diagonally above and behind. ..

The second engaging portion E2 includes a first engaging recess 65 provided above the front end portion of the side wall portion 61 and an upper portion of the front wall portion 41 of the base member 4 (more strictly, a front bending piece portion). It is an engaging portion in which the second engaging recess 46 provided in 41a) is combined. The first engaging recess 65 has a side view concave shape with an open front portion, and the second engaging recess 46 has a flat view concave shape with an open rear portion. The edges of the first and second engaging recesses 65 and 46 are engaged with each other. Based on the above-described configuration of the second engaging portion E2, the front end portion of the side wall portion 61 is displaced in the horizontal width direction, the vertical height direction, and the front of the base member 4 with respect to the base member 4. Positioned so that it does not.

In the screw fastening portion S, the flange portion 61a provided at the front end portion of the side wall portion 61 abuts on the front wall portion 41 of the base member 4, and the screw 7a (screw in the present invention) is attached to the front wall portion 41. It is a part fastened using an example of a member). The front wall portion 41 is provided with a screw hole 79 for screwing with the screw 7a. According to the screw fastening portion S, both of them can be appropriately fixed so that the entire frame-shaped member 6 does not shift in position with respect to the base member 4. In particular, since the fastening direction of the screw 7a is the front-rear direction of the base member 4, it is surely prevented that the frame-shaped member 6 is displaced rearward. The engagement of the first and second engaging portions E1 and E2 is disengaged by retracting the frame-shaped member 6, and the screw fastening portion S appropriately prevents such a situation. Become.

According to the burner unit U and the burner device B provided with the burner unit U, the following actions can be obtained.

That is, there are two screw fastening points (screw fastening portions S) between the base member 4 and the frame-shaped member 6 in the holder H of the burner unit U, which is a small number. Therefore, it is possible to suppress the complexity of the screw fixing work and reduce the manufacturing cost of the burner unit U and, by extension, the manufacturing cost of the burner device B.
As described above, in the first and second engaging portions E1 and E2, the rear and front portions of the frame-shaped member 6 are relative to the base member 4 in the horizontal width direction and the vertical height of the base member 4. Effectively regulates directional and forward misalignment. On the other hand, the screw fastening portion S also reliably prevents the frame-shaped member 6 from being displaced rearward. For this reason, despite the fact that there are only two screw fastening portions S, the frame-shaped member 6 is attached to the base member 4 so as not to rattle in any of the vertical, horizontal, and front-rear directions. On the other hand, it can be installed in an appropriate and robust state.

FIG. 8 shows another embodiment of the present invention. In the figure, elements that are the same as or similar to those of the embodiment are designated by the same reference numerals as those of the embodiment, and duplicate description will be omitted.

In FIG. 8, the front wall portion 41 of the base member 4 is provided with the engaging recess 46, whereas the side wall portion 61 of the frame-shaped member 6 is provided with the first engaging recess of the embodiment. The part corresponding to 65 is not provided. The second engaging portion E2 in the present embodiment is configured so that the front end portion of the side wall portion 61 is fitted into the engaging recess 46.
According to the second engaging portion E2 having the above configuration, although it is not possible to prevent the front end portion of the side wall portion 61 from being displaced in the vertical height direction, the front end portion of the side wall portion 61 is displaced in the left-right lateral width direction. It is possible to properly prevent this, which is useful for positioning the frame-shaped member 6. Contrary to the present embodiment, an engaging recess is formed at the front end of the side wall 61, and a part of the front wall of the base member 4 (a portion that is not the engaging recess) is fitted into the engaging recess. It is also possible to make the configuration.

The present invention is not limited to the contents of the above-described embodiments. The specific configuration of the burner unit and each part of the burner device according to the present invention can be variously redesigned within the scope intended by the present invention.

In the above-described embodiment, the first and second engaging portions E1 and E2 are provided as the engaging portions between the base member and the frame-shaped member, but only one of these is provided. It is also possible to do. The engaging portion referred to in the present invention may be configured to be provided with an engaging portion having a configuration different from that of the first and second engaging portions E1 and E2 described above.

The base member of the holder that constitutes the burner unit does not have to be integrally formed with the bottom wall portion and the front wall portion using a single member, and has a configuration in which these are formed by separate members and joined. You can also do it. The same applies to the frame-shaped member, and the rear wall portion and the pair of left and right side wall portions may be formed of separate members and then joined to each other.

The burner body does not necessarily have to be configured as a light and shade burner, and a different type of burner (burner body) can be used.
The burner device according to the present invention is not limited to the hot water supply device, and its specific use is not limited to, for example, a hot air device or an incinerator.

B Burner device E1, E2 1st and 2nd engaging parts H Holder S Screw fastening part U Burner unit 1 Burner case 2 Auxiliary plate 3 Burner body 4 Base member 40 Bottom wall part 41 Front wall part 45 Engagement slit 45a Front Edge (of engaging slit)
46 Second engaging recess (engaging recess)
6 Frame-shaped member 60 Rear wall portion 61 Side wall portion 63 Engagement claw portion 63a Recession 65 First engagement recess (engagement recess)

Claims (7)

It has a holder for the burner body to hold multiple burner bodies side by side.
This holder is
A base member having a bottom wall portion on which the plurality of burner main bodies are mounted, and a front wall portion that stands up from the front portion of the bottom wall portion and is located on the front side of the plurality of burner main bodies.
A frame-shaped member that is attached to the base member and has a rear wall portion and a pair of left and right side wall portions that surround the rear side and the left and right sides of the plurality of burner main bodies.
It is a burner unit equipped with
As the attachment means of the frame-like member to said base member,
With at least one engaging portion that engages at least a part of the frame-shaped member with the base member,
A pair of left and right screw fastening portions in which a pair of flange portions provided at the front end portions of the pair of side wall portions are fastened to the front wall portion using screw members.
Is equipped with
The pair of flange portions are in the form of outwardly bent pieces that are bent so that the front end portions of the pair of side wall portions project to the left and right sides opposite to the inner region of the pair of side wall portions.
The screw head of the screw member is located on the rear side of the front wall portion and each flange portion, and is located outside the region surrounded by the rear wall portion and the pair of side wall portions of the frame-shaped member. A burner unit that is characterized by being set to. The burner unit according to claim 1.
As the engaging portion, a pair of engaging claws provided in a downward protrusion under the pair of side wall portions and a pair provided on the bottom wall portion so that the pair of engaging claws can enter. A burner unit comprising a first engaging portion in which the engaging slits of the above are combined. The burner unit according to claim 2.
A front opening-shaped recess is formed in each base of the pair of engaging claws, and the front edge portion of each of the engaging slits of the bottom wall portion enters the recess. There is a burner unit. The burner unit according to claim 2 or 3.
The pair of engaging slits are located near the rear portion of the bottom wall portion, extend in the front-rear direction, and are provided in a form in which the rear portion is open, so that the pair of engaging slits are on the rear side thereof. A burner unit that allows the pair of engaging claws to enter from. The burner unit according to any one of claims 1 to 4.
As the engaging portion, at least one of both the front end portion of the pair of side wall portions and the front wall portion of the base member is provided with an engaging recess, and the other engages with the engaging recess. A burner unit with a second engaging portion that is configured to fit in. The burner unit according to claim 5.
The engaging recesses are provided in the front end portion of the pair of side wall portions and have a side view concave first engaging recess having an open front portion, and are provided in the front wall portion of the base member. It is provided with a second engaging recess in a plan view with an opening at the rear.
The edges of these first and second engaging recesses are burner units that are engaged with each other. A burner device comprising the burner unit according to any one of claims 1 to 6.

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