JPH1089669A - Mounting structure of air supply unit for hot water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify mounting and demounting of an air supply unit at assembling and maintenance of a hot water heater, and simply ensure tentative fixation for easy work particularly at demounting. SOLUTION: An inserting part 29 provided in a rear end of an engagement plate 28 on a bottom of an air supply unit is engaged with an engagement hole 43 in a receiving part 42 provided on the interior side of an upper part of a damper unit 40 mounted on the side face of a burner unit. A stopper part 33 of a fixing part 31 provided on the tip end of the engagement plate 28 is engaged with a stopper piece 44 provided on a front surface upper part of the damper unit 40 whereby front and rear parts of the air supply unit is stopped and is completely tentatively fixed to the damper unit 40. Thus, work is safely and easily achieved in the state where a user can release his hold from the air supply unit.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of a heat exchanger and a blower unit of a water heater having a built-in burner for heating the heat exchanger.

[0002]

2. Description of the Related Art Conventionally, as disclosed in Japanese Patent Application Laid-Open No. Hei 5-149528, for example, as shown in FIG. The case 102 is attached, the outlet end of the blower 103 is inserted into the opening of the box-shaped case 102, and L is inserted into a part of the discharge end 104 of the blower 103.
A fan-shaped mounting member 105 is provided, and the entire blower 103 is fixed to the box-shaped case 102 in a state of being inclined rearward.

[0003]

By the way, in this conventional apparatus, the blower 103
Of the box-shaped case 1
When a box-shaped case 102 is made into a damper unit by incorporating a damper for controlling the amount of air blow and a nozzle for injecting fuel into the inside of the case 02, the outlet end portion 104 of the blower 103 inserted into the box-shaped case 102 may contact the damper. Since the fuel injected by the nozzle hits the insertion portion of the outlet end portion 104 of the blower 103 and cannot be sufficiently injected, the size of the damper, the size of the box-shaped case 102, and the position of the nozzle need not be changed. Did not become.

[0004] In the prior art, when the blower 103 is removed for maintenance work or the like after completion of the construction, the blower 103 is first lifted up and the outlet tip 104 inserted into the box-shaped case 102 is removed. 102
When the blower 103 is attached for maintenance work or the like, the blower 103
Must be positioned directly above the box-shaped case 102 in the water heater main body, and then the outlet tip 104 must be inserted into the box-shaped case 102. Therefore, when the blower 103 is assembled in the water heater main body, Above the blower 103, a wasteful space having a size equal to or greater than the length of the outlet end portion 104 inserted into the box-shaped case 102 is necessary. Unless the blower 103 is removed, there is a problem that the work of removing and attaching the blower 103 cannot be performed.

[0005] Further, an L-shaped mounting member 105 is provided at a part of the discharge tip 104 of the blower 103, and the outlet tip 104 of the blower 103 is inserted into the opening of the box-shaped case 102 to temporarily place the blower 103. And mounting member 105
And the box-shaped case 102 are fixed from the front, but in the temporary placement state, the blower 103 and the mounting member 105 are not completely locked with the box-shaped case 102, and the blower 103 There is also a danger that the box may fall off the box-shaped case 102 or fall.

[0006]

The present invention pays attention to this point, and in order to solve the above-mentioned drawbacks, in particular, the configuration of the heat exchanger unit includes a heat exchanger unit having a built-in heat exchanger and a heat exchanger unit below the heat exchanger unit. , A damper unit mounted on the side of the burner unit, and a blower unit mounted on the upper portion of the damper unit, the back surface of the blower unit after the engagement plate at the bottom The insertion part provided at the end is engaged with the insertion receiving part provided at the back side of the upper surface of the damper unit, and the locking part provided at the tip of the engagement plate at the bottom of the blower unit is located at the upper front of the damper unit. This is engaged with the provided locking piece.

[0007]

The rear end of the engagement plate at the bottom of the blower unit 22 is inserted into an insertion hole 43 provided at the back of an upper portion of a damper unit 40 fixed to the side surface of the burner unit 16 mounted inside the water heater main body 1. When the insertion portion 29 is inserted, the projecting portion 30 of the insertion portion 29 comes into contact with the insertion hole 43 and the engagement plate 2
8, and push the insertion portion 29 at the rear end downward.

Next, the fixing portion 3 at the tip of the engagement plate 28
1, the section provided above the front surface of the damper unit 40 has a V-shaped cross section, and the spring-like locking piece 44 abuts the inside of the locking section 33 provided substantially at the center of the fixed section 31. The fixing portion 31 is pushed down from that state, and the locking portion 3 is pressed down.
When the opening 32 on the top 3 comes to the position of the locking piece 44, the pressed locking piece 44 is released and returns to the original state, whereby the bottom of the locking piece 44 is The blower unit 22 is completely temporarily fixed to the damper unit 40 by engaging with the locking surface 34.

As described above, since the blower unit 22 can be temporarily fixed without being inserted into the damper unit 40, no extra space for inserting the blower unit 22 above the damper unit 40 is required. The machine main body 1 can be reduced in size, and the damper unit 40 does not require a space for a portion where the blower unit 22 is inserted, so that the damper unit 40 can be reduced in size.

Further, a flat head screwdriver or the like is
The blower unit 22 does not come off the damper unit 40 as long as the engagement between the locking piece 44 and the locking portion 33 is not forcibly released. At the time of work, there is no need to hold the blower unit 22 by hand, and it is easy to install and
It can be removed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A water heater according to the present invention will be described below with reference to an embodiment shown in the drawings. Reference numeral 1 denotes a water heater main body, which includes a top plate 2, an intermediate plate 3 serving as a side plate and a back plate, a bottom plate 4, and a front panel 5.

Reference numeral 6 denotes a mounting plate, which is a pocket-like heat exchange engaging portion 8 formed by cutting and raising the mounting surface 7 right and left above the projecting mounting surface 7.
A part of the mounting surface 7 is cut and raised at a position below the mounting surface 7 and bent 90 degrees to set up the receiving plate guide piece 9, and a part of the mounting surface 7 is also cut substantially at the center below. The burner engaging piece 10 is set upright by bending it up by 90 degrees. A heat insulating material (not shown) is provided between the outside of the back of the main body and the main body in a threaded hole (not shown) of the fixing surface 11 around the mounting surface 7 The mounting plate 6 is fixed to the inside of the main body by screwing with a screw (not shown) in a state where the mounting plate 6 is interposed.

Reference numeral 12 denotes a partition plate which is opened at substantially the center of a horizontal plane portion for the passage of combustion gas, and provided with a temporary fixing receiving portion 13 at substantially the center on the front side.

Reference numeral 14 denotes a fixing plate having a convex cross section.
A guide portion (not shown) is formed by bending a part of 5 at 90 degrees, and is integrated with the back side of the partition plate 12 by spot welding or the like.

Reference numeral 16 denotes a burner unit. The upper surface of the burner unit 16 is brought into close contact with the lower surface of the partition plate 12 with a heat insulating packing (not shown) interposed between the lower surface of the partition plate 12 and the upper surface of the burner unit 16. It is fixed in the water heater main body 1 by screwing.

Reference numeral 17 denotes a temporary fixing portion, which has a substantially inverted L-shaped cross section, is rotatably supported at the upper center of the front surface of the burner unit 16, and is rotated when the burner unit 16 is mounted. The burner unit 16 is temporarily fixed to the mounting plate 6 by engaging with the temporary fixing receiving portion 13.

An injection port 18 supplies fuel oil to a vaporizer (not shown) in the burner unit 16 and a side surface of the burner unit 16 for supplying combustion air to a mixing chamber (not shown). It is provided with an opening at the end.

Reference numeral 19 denotes a heat exchanger unit.
Is fixed to the heat exchanger 20 by screws (not shown) in a state where the opening surface at the bottom is closely contacted with the upper surface of the partition plate 12 integrated with the fixing plate 14 with packing interposed therebetween. The plate 14 and the partition plate 12 are integrated, and in this state, an engagement protrusion (not shown) provided on the upper rear surface is attached to the heat exchange engagement portion 8 of the mounting plate 6.
Water heater body 1
The combustion gas in the burner unit 16 passes through the heat exchanger unit 19 from the bottom opening surface, heats the heat exchanger 20, and is exhausted from the upper exhaust port 21.

A blower unit 22 includes a blower body 23 containing a blower fan (not shown), a motor unit 24 attached to a side surface of the blower body 23 and rotating the blower fan in the blower body 23. Attached to the side of the blower main body 23 on the opposite side of the motor section 24,
An air supply unit 26 that is connected to an air supply port 25 provided on the top plate 4 of the water heater main body 1 and guides combustion air to the blower main body 2, and is sealed with the bottom of the blower main body 23 using packing or a sealing material. An opening portion for fixing and integrating in a folded state is formed substantially at the center, and the bottom surface thereof is constituted by an engagement plate 28 to which an elastic cushioning material 27 is adhered.

Reference numeral 29 denotes an insertion portion, which is provided with a rear end portion of the engagement plate 28 inclined downward, and has beat-shaped projections 30 formed on the left and right sides thereof.

Reference numeral 31 denotes a fixing portion, which is formed by bending the distal end portion of the engaging plate 28 downward substantially at a right angle to provide an opening 32 substantially at the center thereof, and extending the portion below the opening 32 outward from top to bottom. The locking portion 33 is provided by projecting in an inclined manner so as to expand, so that a locking surface 34 is formed above the locking portion 33 and a contact surface 35 is formed inside. An inverted U-shaped thread groove 36 is formed on the left and right sides of the locking portion 33.

Reference numeral 37 denotes a side engaging portion which is formed by bending one side of the engaging plate 28 downward at substantially a right angle. 3
Reference numeral 8 denotes a joining piece, which is provided by cutting and raising four sides around an opening 39 substantially at the center of the engaging plate 28, and is fixed to a portion to be inserted below the blower main body 23 by welding or the like.

Numeral 40 denotes a damper unit which incorporates a nozzle (not shown) for jetting fuel oil and a damper (not shown) for adjusting the amount of combustion air by varying the angle by a control motor 41 mounted on the lower front side. The blower unit 16 is fixed so as to be in close contact with an ejection port 18 provided on a side surface thereof, and furthermore, is fixed such that an opening portion on an upper surface and an opening portion on a bottom surface of the blower unit 22 are in close contact with each other.

Reference numeral 42 denotes an insertion receiving portion, and a damper unit 40
Of the blower unit 22
An insertion hole 43 into which the 8 insertion portions 29 are inserted is formed.

Reference numeral 44 denotes a locking piece, which is provided substantially at the center of the upper surface of the front surface of the damper unit 40, has a V-shaped cross section and is bent so that the lower side is closer to the front, and has a spring property. Threaded fixing holes 45 are provided on the left and right of the stop piece 44.

Reference numeral 46 denotes a mounting portion, which is formed in a flange shape on the side surface of the damper unit 40 which is mounted on the burner unit 16 at the position of the spout 18, and is attached to the burner unit 16 at the position of the spout 18 by screws. In addition, a packing member 48 is attached to a portion of the mounting portion 46 that comes into contact with the periphery of the ejection port 18 of the burner unit 16 in order to improve the close contact with the periphery of the ejection port 18. Things.

An inspection plate 49 is provided with an inverted U-shaped locking groove 50 and a fixing hole 51 on the left and right sides of the plate, and an inspection plate provided on the side of the middle plate 3 constituting the side plate of the water heater main body 1. After opening the window 52, the inspection screw 53 and the center screw 54 fixing the inspection plate 49 are loosened, and the inspection plate 49 is rotated around the center screw 54 screwed into the fixing hole 51. Inspection opening (not shown) hidden by inspection plate 49
Is exposed, and the inside of the damper unit 40 and the inside of the ejection port 18 can be inspected.

Numeral 55 denotes an oil leveler which stores a fixed amount of fuel oil pumped by a pump 56 and adjusts the amount of fuel by a flow pump 57 to control the damper unit 40.
The nozzle blows out from the nozzle inside to the vaporization chamber in the burner unit 16 and is fixed to the side surface of the burner unit 16 so as to be located below the damper unit 40.

Reference numeral 58 denotes a substrate unit on which a substrate for controlling the entire hot water supply is mounted.
Is fixed to the inside of the water heater main body 1 by screwing it to the lower end of both ends of the front face and screwing the lower part to the near side of the bottom plate 4.

Next, the procedure for assembling the water heater of this embodiment will be described. First, the top plate 2 and the bottom plate 4 are screwed to the middle plate 3 to assemble the water heater main body 1. Next, the mounting plate 6 is fixed to the inside of the rear portion of the middle plate 3 with screws. Here, since the heat insulating material is inserted into the space between the mounting surface 7 of the mounting plate 6 and the intermediate plate 3 to fix the mounting plate 6, the heat of combustion or the combustion gas in the burner unit 16 or the heat exchanger unit 19 is obtained. Heat of the mounting plate 6
From the middle plate 3.

Then, an engaging projection (not shown) provided on the upper rear surface of the heat exchanger unit 19 is engaged with the heat exchange engaging portion 8 of the mounting plate 6 and temporarily fixed, and then is screwed. By fixing, the heat exchanger unit 19 is fixed to the mounting plate 6.

Next, the lower part of the unit in which the damper unit 40 and the oil leveler 55 are previously attached to the burner unit 16 by screws is attached to the burner engaging piece 1 of the mounting plate 6.
0, and furthermore, the temporary fixing portion 17 on the front surface of the burner unit 16 is engaged with the temporary fixing receiving portion 13 of the partition plate 12 to make a temporary fixing state. 16 is fixed to the mounting plate 6.

Next, the blower unit 22 is inserted so that the insertion portion 29 at the rear end of the engagement plate 28 of the blower unit 22 is inserted into the insertion hole 43 of the insertion receiving portion 42 at the back side of the upper surface of the damper unit 40. Is inserted into the space above the damper unit 40 in a state where it is tilted slightly forward.

At this time, since the side engaging portion 37 of the engaging plate 28 comes into contact with the upper portion of the side surface of the damper unit 40 on the inspection plate 49 side, the side engaging portion 37 is brought into contact with the side surface of the damper unit 40. When the blower unit 22 is tilted slightly forward and inserted into the space above the damper unit 40 in the state of being inserted, the insertion portion 29 in front of the engagement plate 28 is guided and the insertion receiving portion 4 is inserted.
2 is inserted into the second insertion hole 43.

When the blower unit 22 is stopped by the insertion of the blower unit 22 into which the projecting portion 30 of the insertion portion 29 inclined downwardly comes into contact with the insertion hole 43, the engagement plate 28 of the blower unit 22 is stopped. When the fixing portion 31 is lowered and tilted slightly forward, the fixing portion 31
Abutment surface 35 inside locking portion 33 and damper unit 40
The abutment piece 44 on the front of the abutment.

In this state, when the fixing portion 31 side of the engagement plate 28 of the blower unit 22 is further lowered, the locking piece 44 on the front surface of the damper unit 40 is brought into contact with the inside of the locking portion 33 of the engagement plate 28. It is pushed by the surface 35 and elastically deforms in the depth direction of the damper unit 40.

Then, the fixing portion 31 side of the engagement plate 28 of the blower unit 22 is further lowered, and the engagement plate 2 of the blower unit 22 is positioned at the position of the locking piece 44 on the front surface of the damper unit 40.
When the opening 32 of the engaging plate 8 is located, the contacting surface 35 of the engaging portion 33 of the engaging plate 28 has been released, but there is no contacting portion. The engaged locking piece 44 returns to the original state, and the lower portion of the locking piece 44 engages with the locking surface 34 above the locking portion 32.

Thus, at the rear end of the engagement plate 28 of the blower unit 22, the projecting portion 30 of the insertion portion 29 of the engagement plate 28 of the blower unit 22 is inserted into the insertion hole 43 of the insertion receiving portion 42 of the damper unit 40. The upper end portion of the engagement plate 28 of the blower unit 22 is locked by the abutment surface 34 above the engagement portion 33 of the fixing portion 31 of the engagement plate 28 of the blower unit 22. Since the blower unit 22 is completely temporarily fixed to the damper unit 40 by being engaged with the engagement piece 44 on the front surface of the blower unit 40, the blower unit 22
During removal work, the blower unit 22 can be safely mounted and removed even when working alone at a high place without slipping or falling.

Then, an air supply port 25 provided on the top plate 4 is connected to an opening of the air supply section 26 of the blower unit 22.

When the temporary fixing state is reached, the position of the fixing hole 45 provided on the front surface of the damper unit 40 and the position of the screw groove 36 of the fixing portion 31 of the engaging plate 28 of the blower unit 22 match. The worker can completely fix the blower unit 22 by screwing it with the hand released from the blower unit 22.

That is, when the temporary fixing state is reached, the position of the fixing groove 45 provided on the front surface of the damper unit 40 and the position of the screw groove 36 of the fixing portion 31 of the engaging plate 28 of the blower unit 22 match. There is no need to screw while aligning the fixing hole 45 and the screw groove 36, and the work of mounting and removing the blower unit 22 during maintenance work and the work of assembling the blower unit 22 during assembly work can be performed very easily. And the assemblability becomes very good.

Then, the upper portion of the substrate unit 58 is fixed with screws at the lower ends on the front surface of the burner unit 16 with screws, and the lower portion of the substrate unit 58 is fixed with screws at the near side of the bottom plate 4. The substrate unit 58 is fixed. After this, after connecting the respective wirings, the front panel 5 is fitted and screwed to complete the assembly.

As described above, since the blower unit 22 can be temporarily fixed without being inserted into the damper unit 40, the blower unit 22 can be freely attached and detached without requiring an extra space for the insertion portion in the installation space of the blower unit 22, and , The damper unit 40 and the blower unit 22
This eliminates the need for an extra space in a portion where the damper unit 40 is inserted, so that the damper unit 40 can be downsized.

Conversely, when the blower unit 22 is to be removed from the water heater main body 1, the front panel 5 is removed to disconnect the respective wirings, and then the upper and lower screws of the board unit 58 are removed. After removing the substrate unit 58 and removing the screws that screw the screw groove 36 of the fixing portion 31 of the engaging plate 28 of the blower unit 22 and the fixing hole 45 provided on the front surface of the damper unit 40, the blower unit The connection between the opening of the air supply section 26 of the unit 22 and the air supply port 25 provided in the top plate 4 is disconnected.

As a result, the blower unit 22 is temporarily fixed to the damper unit 40. In this state, the locking portion 33 of the fixing portion 31 of the engaging plate 28 of the blower unit 22 is set.
By inserting a flathead screwdriver or the like into the connector, the engagement between the locking portion 33 of the engaging plate 28 and the locking piece 44 on the front surface of the damper unit 40 is released, so that the blower unit 22 is free from the damper unit 40. The blower unit 22 can be pulled out by hand and removed from the water heater main body 1.

[0046]

As described above, the present invention provides a heat exchanger unit having a built-in heat exchanger, a burner unit located below the heat exchanger unit, and a damper unit attached to a side of the burner unit. And a blower unit having a blower unit attached to the upper portion of the damper unit, wherein the insertion portion provided at the rear end of the engagement plate at the bottom of the blower unit is provided on the back side of the upper surface of the damper unit. In addition to being engaged with the insertion receiving portion, the locking portion provided at the tip of the engagement plate at the bottom of the blower unit is engaged with the locking piece provided at the upper front of the damper unit. Since the front and rear of the bottom engagement plate are locked and temporarily fixed to the damper unit, the blower unit is not inserted into the damper unit, and extra space is required for insertion and removal. Pace can be miniaturized water heater main body becomes unnecessary, also those which can be reduced yet easy labor work of mounting and removal of the blower unit. Further, since the blower unit is not inserted into the damper unit, no extra space is required for the portion where the blower unit is inserted into the damper unit, and the size of the damper unit can be reduced.

Further, when installing the blower unit, there is no need for anybody to work while supporting the blower unit, and when removing the blower unit, the blower unit can be detached even if the screw fixing the blower unit to the damper unit is removed. Since it does not fall or fall, the worker can easily attach and remove the blower unit safely at a high place alone.

Further, the front and rear of the engagement plate at the bottom of the blower unit are locked by the damper unit, so that the fixing holes provided on the front surface of the damper unit and the positions of the screw grooves of the fixing portion of the engagement plate of the blower unit can be adjusted. Because it will be in a state that matches
When fixing the blower unit with a screw, there is no need for someone to work while adjusting the hole position, and the blower unit can be easily screwed by one worker.

[Brief description of the drawings]

FIG. 1 is a front view showing the inside of a water heater provided with one embodiment of the present invention.

FIG. 2 is an exploded perspective view of the same.

FIG. 3 is a front view when the blower unit and a damper unit are assembled.

FIG. 4 is a side view of the same.

FIG. 5 is a perspective view of a main part of an engagement plate and a damper unit of the blower unit.

FIG. 6 is an essential part cross-sectional view showing a locked state of the locking piece and the engaging portion.

FIG. 7 is an essential part cross-sectional view showing an engaged state between the overhang portion and the insertion receiving portion.

FIG. 8 is a side view showing a mounting structure of a conventional fan unit.

[Explanation of symbols]

 Reference Signs List 16 burner unit 19 heat exchanger unit 20 heat exchanger 22 blower unit 28 engagement plate 29 insertion part 33 locking part 40 damper unit 42 plug receiving part 44 locking piece

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Mitsuru Nagakura 7-7 Higashi Shinbo, Sanjo City, Niigata Pref.

Claims (2)

[Claims] 1. A heat exchanger unit having a built-in heat exchanger, a burner unit located below the heat exchanger unit, a damper unit attached to a side of the burner unit, and an upper part of the damper unit. In the water heater having a built-in blower unit, the insertion portion provided at the rear end of the engagement plate at the bottom of the blower unit is engaged with the insertion receiving portion provided at the back side of the upper surface of the damper unit. A mounting structure for a blower unit of a water heater, wherein a locking portion provided at a tip end of an engagement plate on a bottom portion of the blower unit is engaged with a locking piece provided on an upper front surface of the damper unit. 2. The fixing portion according to claim 1, wherein the insertion portion is provided by inclining a rear end of the engagement plate downward and forming a projecting portion, and the locking portion is formed by bending a front end of the engagement plate downward at a substantially right angle. The lower part of the opening formed in the part is provided so as to protrude outward from the top to the bottom, and the insertion receiving part is provided upright on the back side of the upper surface of the damper unit and is formed by forming an insertion hole, The mounting structure of a blower unit for a water heater according to claim 1, wherein the locking piece is provided substantially at the center of the upper surface of the front surface of the damper unit 40 so as to be bent so that the cross section is V-shaped and the lower side is closer to the front. .