JP6910051B2 - Water heater - Google Patents

Description

The present invention relates to a water heater that accommodates a combustion device or the like and heats the internal water flow to discharge hot water.

As disclosed in Patent Document 1, for example, the water heater includes a burner, a gas pipe connected to the burner, a proportional valve or an igniter, a frame rod, a heat exchanger, a water supply pipe and a hot water pipe connected to the heat exchanger, and the like. It has.
These combustion devices, pipes, electrical components, etc. are housed in, for example, a housing having an open front surface, and the front surface is closed by a front cover.

Japanese Unexamined Patent Publication No. 2014-25664

It is desirable to install electrical components such as igniters in a position that is easily accessible in the housing for wiring work and status confirmation. However, due to the miniaturization of the housing, most of the space inside the housing is occupied by the combustion device, piping, etc., and it may not be possible to install the electrical components in an easily accessible position.

Therefore, the present invention provides a water heater that can arrange electrical components such as an igniter at an easily accessible position even when there is not enough space in the housing, and can easily perform wiring work, status confirmation, and the like. The purpose is.

In order to achieve the above object, the invention according to claim 1 is a water heater including a housing for accommodating a combustion device and opening a predetermined surface, and a cover for closing the opening of the housing. There,
On the opening side of the housing, a support member parallel to the opening is erected between the nozzle base of the burner provided in the combustion device and the housing, and the end portion of the support member on the nozzle base side is It is screwed to the nozzle base, and the end on the housing side is sandwiched and fixed between the housing and the cover.
The support member is formed in a stepped shape having a step in the front and rear with respect to the opening, includes a plurality of support portions having different front and rear positions , and a predetermined electrical component having a different front and rear thickness on the opening side surface of the support member. Is characterized in that each can be installed.
The invention according to claim 2 is characterized in that, in the configuration of claim 1 , the electrical component includes at least an igniter.

According to the first aspect of the present invention, a support member parallel to the opening is provided on the opening side of the housing, and a predetermined electrical component is installed on the opening side surface of the support member. Even if there is not enough space, electrical components such as an igniter can be placed in an easily accessible position. Therefore, it is possible to easily perform wiring work and status confirmation of electrical components.
Further , by installing the support member between the nozzle base and the housing, wiring work or the like can be performed more easily at a position close to the burner.
According to the invention of claim 2 , in addition to the effect of claim 1 , the igniter can be installed at the optimum position by using at least the igniter as the electrical component.

It is a perspective view of a water heater. It is a perspective view of the housing with the front cover removed. It is an enlarged perspective view of the erection part of a support member. It is a side view of the case which removed the front cover.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing an example of a water heater, and FIG. 2 is a perspective view of a housing with the front cover removed.
The water heater 1 has a vertically long box-shaped housing 2 having an opening 2a formed on the front surface and composed of a top plate 3, a bottom plate 4, left and right side plates 5, 5, and a back plate 6, and a front surface that closes the front surface of the housing 2. It has a cover 7. Components such as a combustion unit 9 having a burner, a heat exchange unit 10 having a heat exchanger, and a combustion device 8 including an exhaust unit 11 are housed in the housing 2, and front covers are provided on the four sides of the opening 2a. Flange portions 12, 12, ... For mounting of No. 7 are formed so as to be folded back to the outside. Screw holes 13 and 13 for mounting the front cover 7 are formed in the upper and lower flange portions 12 and 12. Reference numerals 14 and 14 are installation metal fittings attached to the top and bottom of the back plate 6.

The front cover 7 has a vertically long rectangular shape having substantially the same shape as the housing 2 when viewed from the front, and has an outer peripheral portion 15 fitted to the front surface including the flange portions 12, 12, ... Of the housing 2, and the entire outer peripheral portion 15 from the inside. It has a shape having a thickness in the front-rear direction with a vertically long rectangular bulge portion 16 in front view that bulges forward. An elongated hole 17 into which a horizontally long exhaust port 11a provided on the front surface of the exhaust unit 11 is fitted is formed on the upper front surface of the bulging portion 16, and intake holes 18, 18 and are formed on the lower front surface and side surfaces.・ Is formed.
Further, a window 19 for visually recognizing the monitor 37 (described later) provided inside the housing 2 is formed in the lower portion of the bulging portion 16, and a sealing material (not shown) is attached around the back side of the window 19. Has been done.

On the other hand, the combustion unit 9 is provided with a metal nozzle base 20 having a plurality of nozzles for supplying fuel gas to the burner on the front side, and a combustion unit is provided in the housing 2 below the nozzle base 20. A fan 21 for supplying combustion air to 9 and a controller 22 provided with an electrical board are installed. The gas pipe connected to the nozzle base 20 and the pipe connected to the heat exchange unit 10 are connected to an external pipe via the bottom plate 4 below the nozzle base 20.

A support member 23 is erected between the nozzle base 20 and the bottom plate 4. As shown in FIG. 3, the support member 23 is a strip-shaped metal plate extending in the vertical direction, and has an upper support portion 24 and an opening 2a that recede slightly behind the opening 2a of the housing 2 on the upper side. The lower support portion 25, which is substantially flush with each other, is formed so as to have a step in the front and rear. At the upper end of the upper support portion 24, an upper mounting piece 26 having an engaging recess 27 that is screwed to the front surface of the nozzle base 20 and engages with a protrusion 20a projecting from the front surface is formed by bending. ing. On the other hand, at the lower end of the lower support portion 25, there is a stepped locking portion 28a that locks to the bent side of the lower flange portion 12 of the bottom plate 4, and the lower locking portion hangs down along the flange portion 12. The piece 28 is bent and formed. The lower locking piece 28 is formed with a notch 29 that does not interfere with the screw hole 13.

Of the support members 23, an igniter 30 as an electrical component is attached to the front surface of the upper support portion 24. Here, the receiving piece 31 is formed by being cut forward on the upper supporting portion 24, and with the igniter 30 placed sideways on the receiving piece 31, the screwed piece 32 provided on the upper portion is placed on the upper supporting portion 24. The igniter 30 is fixed by screwing into. A cable clip 33 for fixing the wiring on the front side of the upper support portion 24 is provided on the front surface of the upper support portion 24 below the igniter 30.

Further, a monitor board 34 as an electrical component is attached to the front surface of the lower support portion 25. The monitor board 34 accommodates a board 36 on which electronic components such as a monitor 37 composed of a 7-segment display are mounted in a case 35 that opens the front surface, and a screw fixing piece 38 provided on the upper part of the case 35 is provided. The monitor board 34 is fixed by screwing it into the lower support portion 25. The monitor board 34 causes the monitor 37 to display the state of an instrument such as an error code in response to an instruction from the controller 22, and the monitor 37 is arranged corresponding to the position of the window 19 of the front cover 7.

In the water heater 1 configured as described above, after the components such as the combustion device 8 are housed in the housing 2, the support member 23 to which the igniter 30 and the monitor board 34 are attached is attached to the nozzle base 20 and the bottom plate 4. The upper mounting piece 26 is screwed to the nozzle base 20 in a state where the engaging recess 27 is engaged with the protrusion 20a. Then, the support member 23 to which the upper mounting piece 26 is fixed hangs downward from the nozzle base 20, and the locking portion 28a of the lower locking piece 28 is locked to the bottom plate 4 and is located in front of the flange portion 12. .. Therefore, wiring work to the nozzle base 20 and the controller 22 can be easily performed.

After that, if the front cover 7 is put on the front surface of the housing 2 and screwed to the flange portions 12 and 12, the lower locking piece 28 is sandwiched between the front cover 7 and the lower flange portion 12, and the support member is supported. 23 is fixed in the housing 2 in parallel with the opening 2a. Since the nozzle base 20 and the support member 23 are made of conductive metal, grounding can be secured through the same metal housing 2.
When the front cover 7 is fixed in this way, the monitor 37 of the monitor board 34 comes into close contact with the window 19 of the front cover 7 from the back side. Therefore, the monitor 37 can be visually recognized from the outside through the window 19.
On the other hand, when performing maintenance or checking the status of the igniter 30 and the monitor board 34, if the front cover 7 is removed, the igniter 30 and the monitor board 34 project forward from the opening 2a of the housing 2 as shown in FIG. Since it is exposed at the position where it is to be used, maintenance work and status confirmation can be easily performed.

As described above, according to the water heater 1 of the above-described embodiment, the support member 23 parallel to the opening 2a is provided on the opening 2a side of the housing 2, and the support member 23 is provided on the surface of the support member 23 on the opening 2a side. Since the electrical components (here, the igniter 30 and the monitor board 34) are installed, the electrical components such as the igniter 30 can be arranged in an easily accessible position even if there is not enough space in the housing 2. .. Therefore, it is possible to easily perform wiring work and status confirmation of electrical components.

In particular, here, since the support member 23 is erected between the nozzle base 20 of the burner provided in the combustion device 8 and the housing 2, wiring work or the like can be performed more easily at a position close to the burner. can.
Further, since the electrical component includes at least the igniter 30, the igniter 30 can be installed at an optimum position.

In the above embodiment, the support member is erected in the vertical direction, but it may be in the horizontal direction or the diagonal direction depending on the space in the housing. Therefore, it is not limited to the installation between the nozzle base and the bottom plate, but it can also be installed between the left and right side plates or between the side plates and the bottom plate. A means other than fixing the support member and screwing can be adopted, and it is conceivable to sandwich both ends between the front cover and the housing after positioning the unevenness or the like without screwing. Further, the support member is not limited to erection, and may be cantilevered by a housing, a combustion device, or the like.

The shape of the support member itself may be the opposite of the step between the upper support portion and the lower support portion, and is not limited to a strip-shaped plate having a step, but may be a flat plate or a corner portion between the side plate and the bottom plate. It can be changed as appropriate, such as a triangular shape to be erected or a rod shape.
Further, the electrical components are not limited to the igniter and the monitor board, and are not limited to the above-mentioned form, such as providing a part of the electrical board of the controller separately. Of course, three or more electrical components can be installed on the support member, or a plurality of support members can be provided for each electrical component.

In the above embodiment, the support member is provided in the opening formed on the front surface of the housing, but the opening is not limited to the front surface of the housing but also on other surfaces such as the side surface of the housing. Can be installed, and the present invention can be adopted even if the cover is not removed but is connected by a hinge.

1 ... Water heater, 2 ... Housing, 2a ... Opening, 4 ... Bottom plate, 7 ... Front cover, 8 ... Combustion device, 9 ... Combustion part, 12 ... Flange part, 13 ... Screw Hole, 19 ... Window, 20 ... Nozzle stand, 20a ... Protrusion, 21 ... Fan, 22 ... Controller, 23 ... Support member, 24 ... Upper support part, 25 ... Lower support part, 26・ ・ Upper mounting piece, 28 ・ ・ Lower locking piece, 30 ・ ・ Igniter, 31 ・ ・ Receiving piece, 32, 38 ・ ・ Screw fixing piece, 34 ・ ・ Monitor board, 37 ・ ・ Monitor.

Claims (2)

A water heater including a housing that accommodates a combustion device and opens a predetermined surface, and a cover that closes the opening of the housing.
On the opening side of the housing, a support member parallel to the opening is erected between the nozzle base of the burner provided in the combustion device and the housing, and the nozzle base in the support member. The end on the side is screwed to the nozzle base, and the end on the housing side is sandwiched and fixed between the housing and the cover.
The support member is formed in a stepped shape having a step in the front and rear with respect to the opening, includes a plurality of support portions having different front and rear positions, and has different front and rear thicknesses on the surface of the support member on the opening side. A water heater characterized in that predetermined electrical components can be installed individually. The water heater according to claim 1 , wherein the electrical component includes at least an igniter.

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