JP7066448B2 - Water heater - Google Patents

Description

The present invention relates to a water heater installed on a pipe shaft or the like of an apartment house such as a condominium.

Patent Document 1 discloses an instantaneous water heater having a front plate and a rear plate fixed to the front surface and the rear surface of a body plate portion for fixing a heat exchanger. In the instantaneous water heater described in Patent Document 1, abnormal temperature detecting means are attached to each of the front plate and the rear plate. As a result, the instant water heater described in Patent Document 1 can be installed close to the wall surface even in the housing situation in Japan where space saving is advancing.

Patent Document 2 discloses a combustion device including a long fuse member. The long fuse member described in Patent Document 2 is uniformly arranged in each part with an arbitrary shape between the insulating base material and the insulating thin plate material, and is integrally gripped by the insulating base material in a pack shape with the insulating thin plate material. It is fixed. As a result, overheat detection at an unspecified local position is surely performed. Therefore, similar to the instantaneous water heater described in Patent Document 1, the combustion equipment described in Patent Document 2 can be installed close to the wall surface even in the housing situation in Japan where space saving is advancing. It is said that.

For example, a water heater as disclosed in Patent Document 1 and Patent Document 2 may be arranged corresponding to each house of an apartment house such as a condominium. In this case, as the arrangement form of the water heater, one water heater is arranged on the pipe shaft (also referred to as a pipe space) of one dwelling unit, and two water heaters are two adjacent dwelling units. There are cases where they are arranged side by side on the shared pipe shaft.

When one water heater is arranged on the pipe shaft of one dwelling unit, a sufficient space for accommodating the water heater on the pipe shaft is secured. Therefore, the width dimension of the water heater is set to a relatively large value.

On the other hand, when two water heaters are arranged side by side on the common pipe shaft of two adjacent dwelling units, compared with the case where one water heater is arranged on the pipe shaft of one dwelling unit. Therefore, the storage space of the water heater in the pipe shaft is narrow. Therefore, the width dimension of each of the two water heaters is set to a relatively small value (for example, a value of about half).

Generally, the water heater has a box-shaped housing for accommodating a heat exchanger, a gas burner, and the like, and a front cover. The front cover covers the opening on the front of the housing. The front end portion of the side plate of the housing has a folded portion in order to secure the strength of the housing. The front cover is overlapped with the folded portion of the housing and attached to the housing. On the other hand, the water heater having the same structure may be directly attached to the wall surface of a detached house, and the metal fitting for a pipe shaft of an apartment or the like is replaced with the metal fitting for the detached house.

Jitsufuku No. 3-3800 Gazette Jitsufuku No. 8-7236 Gazette

Here, in order to reduce the width dimension of the water heaters arranged side by side on the common pipe shaft of two adjacent dwelling units, the forming width of the folded portion of the housing is made as narrow as possible to reduce the internal volume of the housing. A large amount is being secured. However, since the formed width of the folded portion of the side plate is set to the narrowest possible width, there is room for improvement in that the side plate of the housing cannot secure a large strength.

That is, containers such as heat exchangers, blowers, circuit boards, bundled wires of electrical wiring, pipes, and the like are tightly housed in a housing having such a structure. Therefore, if the strength of the side plate of the housing is relatively low, the side plate may be pushed by the contained object and curved sideways. On the other hand, by attaching the front cover to the housing, the deformation (curvature) of the side plate may be corrected.

However, when the operator removes the front cover from the housing when installing the water heater on the pipe shaft at the installation site, the side plate of the housing bends sideways again. Then, when the operator reattaches the front cover to the housing, it may be difficult to correct the deformation (curvature) of the side plate. Therefore, even in a water heater arranged side by side on a common pipe shaft of two adjacent dwelling units, it is desired to suppress bending of the side plate of the housing.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a water heater capable of suppressing lateral bending of the side plate of a housing.

According to the present invention, the subject is a housing accommodating a heat exchanger and a housing that is arranged inside the housing to shield heat generated from the heat exchanger and a side plate of the housing. It is solved by a water heater characterized by having a heat shield plate that suppresses the bending of the sideways.

According to the above configuration, the water heater includes a housing containing the heat exchanger and a heat shield plate. The heat shield plate is arranged inside the housing to shield the heat generated from the heat exchanger and prevent the side plate of the housing from bending sideways. For this reason, when the width of the folded portion of the side plate is set as narrow as possible and the side plate of the housing cannot secure a large strength, when the operator installs the water heater on the pipe shaft at the installation site, for example, Even if the front cover is removed from the housing, the heat shield plate can prevent the side plates of the housing from bending sideways. Further, the heat shield plate can prevent the folded portion of the side plate from jumping toward the outside of the housing. Since the side plate of the housing is suppressed from bending sideways, the operator can easily attach the front cover to the housing, and for example, a plurality of water heaters can be reliably installed side by side in the pipe shaft.

Preferably, the side plate has one side plate and the other side plate facing the one side plate, and the heat shield plate has a first heat shield plate fixed to the inside of the one side plate. It is characterized by having a second heat shield plate fixed to the inside of the other side plate.

According to the above configuration, the first heat shield plate is fixed to the inside of one side plate of the housing, and the second heat shield plate is fixed to the inside of the other side plate of the housing. That is, the side plates facing each other are suppressed from bending laterally by the heat shield plates (first heat shield plate and second heat shield plate) fixed to the inside of each. As a result, the first heat shield plate and the second heat shield plate can shield heat inside the housing, and can reliably reinforce the housing even if the housing is made lighter by using a thin plate. can.

Preferably, the shape of the first heat shield plate is the same as the shape of the second heat shield plate.

According to the above configuration, the heat shield plate can be shared and used for both one side plate and the other side plate. This makes it possible to reduce the types of components of the water heater.

Preferably, each of the first heat shield plate and the second heat shield plate is provided at a first protruding portion provided at one end and at the other end facing the one end. It has a second protruding portion and a mounting portion provided at a position between the first protruding portion and the second protruding portion at an end portion intersecting the one end portion and the other end portion. The mounting portion of the first heat shield plate is fixed to the one side plate, the mounting portion of the second heat shield plate is fixed to the other side plate, and the first heat shield plate is fixed to the first side plate. The one protruding portion and the second protruding portion abut on the inner surface of the one side plate when the one side plate tries to bend sideways, and the first protruding portion and the second protruding portion of the second heat shield plate. The portion is characterized in that when the other side plate tries to bend laterally, it comes into contact with the inner surface of the other side plate.

According to the above configuration, the first protruding portion and the second protruding portion of the first heat shield plate come into contact with the inner surface of one side plate of the housing when one side plate of the housing tries to bend sideways. Further, the first protruding portion and the second protruding portion of the second heat shield plate come into contact with the inner surface of the other side plate when the other side plate tries to bend sideways. Therefore, even if the operator removes the front cover from the housing, for example, the side plate of the housing is surely suppressed from bending sideways.

Preferably, the mounting portion has a claw-shaped structure in which the plate is bent, and the mounting portion of the first heat shield plate is fitted into a slit portion provided at the front end portion of the one side plate. The mounting portion of the second heat shield plate is characterized in that it is fitted into a slit portion provided at the front end portion of the other side plate.

According to the above configuration, the claw-shaped mounting portion of the first heat shield plate is fitted into the slit portion of one side plate. As a result, the first heat shield plate is easily attached to the slit portion of one side plate and is securely fixed to one side plate. Further, the claw-shaped mounting portion of the second heat shield plate is fitted into the slit portion of the other side plate. As a result, the second heat shield plate is easily attached to the slit portion of the other side plate and is securely fixed to the other side plate.

Preferably, at least a part of the rear end portion of the first heat shield plate is fastened to the one side plate by a fastening member, and at least a part of the rear end portion of the second heat shield plate is the other. It is characterized in that it is fastened to the side plate of the above by a fastening member.

According to the above configuration, at least a part of the rear end portion of the first heat shield plate is easily and surely fixed to one side plate by the fastening member. Further, at least a part of the rear end portion of the second heat shield plate is easily and surely fixed to the other side plate by the fastening member.

Preferably, the housing has a back plate extending in a direction intersecting the side plate at the rear portion and connected to the side plate, and at least a part of the other rear end portion of the first heat shield plate is said. It is sandwiched and held between one side plate and the back plate, and at least the other part of the rear end portion of the second heat shield plate is sandwiched between the other side plate and the back plate. It is characterized by being retained.

According to the above configuration, at least a part of the rear end portion of the first heat shield plate is sandwiched and held between one side plate and the back plate with respect to one side plate, and the other side plate is held. Easily fixed to. Further, at least a part of the rear end portion of the second heat shield plate is sandwiched and held between the other side plate and the back plate with respect to the other side plate, and is easily held against the other side plate. Is fixed to.

According to the present invention, it is possible to provide a water heater capable of suppressing lateral bending of the side plate of the housing.

It is a front view which shows the water heater which concerns on embodiment of this invention. It is a side view which shows the water heater when viewed from the direction of the arrow T11 shown in FIG. It is a perspective view which shows the water heater 1 shown in FIG. It is a figure which shows the installation example of the water heater installed in the apartment house. It is a figure explaining the deformation of a housing. It is a front view which shows the 1st heat shield plate and the 2nd heat shield plate. It is a perspective view which shows the 1st heat shield plate and the 2nd heat shield plate. It is a side view which shows the 1st heat shield plate and 2nd heat shield plate. It is sectional drawing which shows the 1st heat shield plate and 2nd heat shield plate. It is a figure which shows the heat shield plate. It is sectional drawing in the cut surface AA shown in FIG. It is sectional drawing in the cut surface BB shown in FIG. It is a schematic diagram explaining the operation example of the 1st heat shield plate and the 2nd heat shield plate of this embodiment.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
Since the embodiments described below are suitable specific examples of the present invention, various technically preferable limitations are attached, but the scope of the present invention is particularly limited to the present invention in the following description. Unless otherwise stated, the present invention is not limited to these aspects. Further, in each drawing, the same components are designated by the same reference numerals, and detailed description thereof will be omitted as appropriate.

FIG. 1 is a front view showing a water heater according to an embodiment of the present invention.
FIG. 2 is a side view showing a water heater when viewed from the direction of arrow T11 shown in FIG.
FIG. 3 is a perspective view showing the water heater 1 shown in FIG.
In the water heater 1 shown in FIGS. 1 and 3, the front cover 3 is not shown, and the housing 2 is shown. In FIG. 2, the front cover 3 is attached corresponding to the opening 15 on the front surface of the housing 2. The shape of the water heater 1 shown in FIG. 3 is shown in a simplified manner in order to make the water heater 1 shown in FIGS. 1 and 2 easy to understand. In FIGS. 1 and 3, the ends of the heat shield plates 31 and 32 are omitted in order to clearly display the first protruding portion 41 and the second protruding portion 42.

The water heater 1 according to the present embodiment includes a housing 2 and a front cover 3. The housing 2 and the front cover 3 shown in FIGS. 1 to 3 are made of a metal plate such as a steel plate. The thickness of the metal plate constituting the housing 2 is required to be 0.8 mm or more according to the structural regulations, but in reality, it is, for example, 0.8 mm. As shown in FIGS. 1 and 3, the housing 2 includes one side plate (left side plate) 10, the other side plate (right side plate) 11, a top plate 12, a bottom plate 13, and a back plate 14. It is a box-shaped case having. For convenience of explanation, in the following description, one side plate is referred to as "left side plate" and the other side plate is referred to as "right side plate". The left side plate 10 of the present embodiment corresponds to the "one side plate" of the present invention. The right side plate 11 of the present embodiment corresponds to the "other side plate" of the present invention. The left side plate 10 and the right side plate 11 face each other. The housing 2 has a rectangular opening 15 on the front surface.

The left side plate 10 has a folded portion 20 along the Z direction in the vertical direction of the housing 2. A slit portion 10H is provided at the front end portion 10A of the left side plate 10. Similarly, the right side plate 11 has a folded portion 21 along the Z direction of the housing 2. A slit portion 11H is provided at the front end portion 11A of the right side plate 11. In the present embodiment, the Z direction corresponds to the vertical direction of the housing 2. The top plate 12 has a folded-back portion 22 along the lateral X direction of the housing 2. The bottom plate 13 has a folded portion 23 along the X direction of the housing 2. In this embodiment, the X direction corresponds to the horizontal direction of the housing 2. Since the housing 2 has the folded portions 20, 21, 22, and 23, the strength can be secured as much as possible even if the housing 2 is made of a relatively thin metal plate. In this embodiment, the Y direction corresponds to the depth direction of the housing 2. The X direction, the Y direction, and the Z direction are orthogonal to each other.

The front cover 3 shown in FIG. 2 is overlapped or fitted to the folded portion 22 of the top plate 12 and the folded portion 23 of the bottom plate 13 and is fixed by a fastening member such as a screw. For example, the front cover 3 is fixed to each of the folded-back portion 22 of the top plate 12 and the folded-back portion 23 of the bottom plate 13 by fastening members at about two places. As a result, the front cover 3 closes the opening 15 on the front surface of the housing 2. The front cover 3 is not fixed to the folded portion 20 of the left side plate 10 and the folded portion 21 of the right side plate 11. On the other hand, when the front cover 3 is removed from the housing 2, the opening 15 on the front surface of the housing 2 is opened. As shown in FIG. 2, the front cover 3 has an exhaust port 3A.

As illustrated by the alternate long and short dash line in FIG. 1, various devices, wiring, and other contained objects are housed inside the housing 2. Examples of the contained objects include, for example, a heat exchanger 5, a blower fan 6, a gas burner 7, an exhaust unit 8, a circuit board unit 9, bundled wires such as electrical wiring (not shown), pipes, and the like. The exhaust unit 8 corresponds to the position of the exhaust port 3A of the front cover 3 in FIG.

As illustrated in FIGS. 1 and 3, a plurality of heat shield plates 31, 32, 33 are arranged at least in a part of the inside of the housing 2. That is, the water heater 1 according to the present embodiment further includes heat shield plates 31, 32, 33. The heat shield plates 31, 32, 33 have both a heat shield effect of shielding or blocking heat generated by the heat exchanger 5 and the like, and a reinforcing effect of reinforcing the strength of the housing 2. The heat shield plates 31, 32, 33 are made of, for example, a molten aluminum-plated alloy into a rectangular shape. However, the materials of the heat shield plates 31, 32, 33 are not limited to this. The thickness of the heat shield plates 31, 32, 33 is, for example, 0.4 mm, but the thickness is not limited to this.

As shown in FIGS. 1 and 3, the first heat shield plate 31 is fixed to the inside of the left side plate 10 of the housing 2. The second heat shield plate 32 is fixed to the inside of the side plate 11 on the right side of the housing 2. The third heat shield plate 33 is fixed to the inside of the back plate 14. As illustrated in FIG. 1, the heat shield plates 31, 32, and 33 are arranged at least at positions surrounding the heat exchanger 5.

The member forming the outer shape of the heat exchanger 5 is made of, for example, copper. The portion that supports the gas burner 7 is made of steel. During operation of the heat exchanger 5 and the gas burner 7, the temperature of the copper member of the heat exchanger 5 and the upper portion of the steel material supporting the gas burner 7 become high, for example, to about 150 ° C. As a result, stress is generated in the copper member of the heat exchanger 5 and the steel material that supports the gas burner 7. If a hole or the like is formed in at least a part of these members, a flame having a temperature of, for example, about 1800 ° C. may be ejected. When the ejected flame directly heats the housing 2, the heated portion of the housing 2 may exceed, for example, 700 ° C., and the building side (for example, the wall surface) facing the housing 2 may exceed 100 ° C. The heat shield plates 31, 32, 33 shield the flame of about 1800 ° C. (so that the wall surface temperature does not exceed 100 ° C. and the heated portion of the housing 2 does not exceed 500 ° C., for example. To do). Further, the heat shield plates 31, 32, 33 reinforce the strength of the housing 2 in order to suppress the deformation of the housing 2. Hereinafter, the heat shield plates 31, 32, and 33 will be further described with reference to the drawings.

FIG. 4 is a diagram showing an installation example of a water heater installed in an apartment house H.
As illustrated in FIG. 4, the apartment house H is provided with dwelling units R1, R2, and R3 along the common corridor K. The pipe shaft PS1 is provided corresponding to the dwelling unit R1. On the pipe shaft PS1, one water heater 1R having a relatively wide width W1 as shown in FIG. 4A is arranged. On the other hand, the pipe shaft PS2 is provided in common corresponding to two adjacent dwelling units R2 and R3. Two water heaters 1 and 1 having a relatively narrow width W are arranged on the pipe shaft PS2 as shown in FIG. 4 (b). The water heater 1R is a comparative example for comparing the water heater 1 of the present embodiment. In some cases, one pipe shaft may be prepared for each water heater having a relatively narrow width W.

When the accommodation space volumes (or horizontal cross-sectional areas) of the pipe shafts PS1 and PS2 are the same, the lateral width W of the water heater 1 of the present embodiment shown in FIG. 4 (b) is a comparison shown in FIG. 4 (a). It will be about half the width W1 of one water heater 1R, which is wide in the example. In this way, when the two water heaters 1 and 1 are arranged side by side on the shared pipe shaft PS2 of the two adjacent dwelling units R2 and R3, a wide range of one water heater (water heater of the comparative example). ) Compared with the case where 1R is arranged in the pipe shaft PS1 of one dwelling unit, the accommodation space per water heater in the pipe shaft PS2 becomes narrower. Therefore, the width W of each of the two water heaters 1 and 1 is set to a value smaller than the width W1 of one water heater of the comparative example (for example, a value of about half).

As described above, the water heater 1 includes a box-shaped housing 2 and a front cover 3. The front cover 3 covers the opening 15 on the front surface of the housing 2. The side plates 10 and 11 of the housing 2 have folded portions 20 and 21, respectively. The top plate 12 of the housing 2 has a folded-back portion 22. The bottom plate 13 of the housing 2 has a folded-back portion 23. The front cover 3 is attached to the housing 2 by being overlapped with or fitted to the folded-back portions 22 and 23 and fixed by a fastening member. Here, in order to make the width W of the water heater 1 as small as possible, the forming width of the folded portions 20 and 21 of the side plates 10 and 11 of the housing 2 of the water heater 1 is made as narrow as possible to reduce the internal volume of the housing 2. Is being secured to a large extent.

FIG. 5 is a diagram illustrating deformation of the housing.
FIG. 5A is a bottom view showing the water heater 1R of the comparative example. FIG. 5B is a bottom view showing a water heater according to an embodiment of the present invention. FIG. 5C is a perspective view illustrating a modification of the housing of the present embodiment. FIG. 5D is a partial cross-sectional view illustrating the deformation of the housing of the present embodiment. FIG. 5 (e) is an enlarged view of the region A11 shown in FIG. 5 (d).

In the water heater 1R of the comparative example shown in FIG. 5A, the formation width V of the folded portions 200 and 201 is, for example, about 10 mm. On the other hand, in the water heater 1 according to the present embodiment shown in FIG. 5B, the formed width S of the folded portions 20 and 21 is about 7 mm or less than 7 mm. As described above, in the water heater 1 of the present embodiment shown in FIG. 5 (b), the formation width S of the folded portions 20 and 21 of the side plates 10 and 11 is the water heater 1R of the comparative example shown in FIG. 5 (a). The value is set as narrow as possible with respect to the formation width V of the folded portions 200 and 201. Therefore, the side plates 10 and 11 of the housing 2 of the water heater 1 of the present embodiment may not be able to secure a large strength in a single (single item) state.

Therefore, as shown in FIG. 1, when the heat exchanger 5, the blower fan 6, the circuit board portion 9, the bundled wires of the electric wiring, the pipes, and the like are packed and accommodated inside the housing 2, FIG. 5 (c). ) And the arrow XX shown in FIG. 5 (d), the side plates 10 and 11 of the housing 2 may be curved and swelled sideways. Further, as shown by the arrows YY shown in FIGS. 5 (d) and 5 (e), the folded portions 20 and 21 cannot maintain the folded angle with respect to the side plates 10 and 11, and may jump toward the outside of the housing 2. be. On the other hand, by attaching the front cover 3 to the housing 2, the curvature of the side plates 10 and 11 of the housing 2 may be corrected.

However, when the water heater 1 shown in FIG. 4 is installed on the pipe shaft PS2, the operator removes the front cover 3 from the housing 2. For example, the operator removes the front cover 3 from the housing 2 and connects the remote control line to the remote control line connection portion provided inside the housing 2. Then, since the forming width S of the folded portions 20 and 21 is relatively narrow, the side plates 10 and 11 of the housing 2 are curved sideways again as shown by the arrows XX shown in FIGS. 5 (c) and 5 (d). do. Further, as shown by the arrows YY shown in FIGS. 5 (d) and 5 (e), the folded portions 20 and 21 jump up again toward the outside of the housing 2. Then, when the operator reattaches the front cover 3 to the housing 2, it may be difficult to correct the deformation (curvature) of the side plates 10 and 11. Specifically, if the operator carelessly attaches the front cover 3 to the housing 2, the front cover 3 can be fitted to the folded-back portion 22 of the top plate 12 and the folded-back portion 23 of the bottom plate 13. Therefore, it may not be possible to fit the folded portions 20 and 21 of the side plates 10 and 11. In this case, a gap may occur between the front cover 3 and the folded portions 20 and 21 of the side plates 10 and 11. Then, rainwater or the like may enter the housing 2 through the gap between the front cover 3 and the folded portions 20 and 21 of the side plates 10 and 11.

On the other hand, in the water heater 1 according to the present embodiment, as illustrated in FIGS. 1 and 3, the first heat shield plate 31 is on the left side in order to reinforce the left side plate 10 of the housing 2. It is fixed to the inner surface of the side plate 10. Further, the second heat shield plate 32 is fixed to the inner surface of the right side plate 11 in order to reinforce the right side plate 11 of the housing 2. Further, the third heat shield plate 33 is fixed to the inner surface of the back plate 14 in order to reinforce the back plate 14. In this way, the heat shield plates 31, 32, 33 are fixed in the housing 2, so that the heat shield effect of shielding the heat of the heat exchanger 5 and the like and the strength of the housing 2 are reinforced. It can have both a reinforcing effect and a reinforcing effect.

Therefore, when the forming width S of the folded portions 20 and 21 of the side plates 10 and 11 is set to the narrowest possible width and the side plates 10 and 11 cannot secure a large strength, the operator installs the water heater 1 on the pipe shaft at the installation site. When installing the PS2, for example, even if the front cover 3 is removed from the housing 2, the heat shield plates 31 and 32 can prevent the side plates 10 and 11 of the housing 2 from bending sideways. Further, the heat shield plates 31 and 32 can prevent the folded portions 20 and 21 from jumping up toward the outside of the housing. Since the side plates 10 and 11 of the housing 2 are suppressed from bending sideways, the operator can easily attach the front cover 3 to the housing 2, for example, arranging a plurality of water heaters 1 in the pipe shaft PS2. It can be installed reliably.

Further, the side plates 10 and 11 facing each other are suppressed from bending laterally by the heat shield plates (first heat shield plate 31 and second heat shield plate 32) fixed to the inside of each. As a result, the first heat shield plate 31 and the second heat shield plate 32 shield the heat inside the housing 2, and even if the housing 2 is made lighter by using a thin plate, the housing 2 is reinforced. Can be done reliably.

Next, the heat shield plates 31, 32, 33 will be further described with reference to FIGS. 1 and 3.
The heat shield plates 31 and 32 shown in FIGS. 1 and 3 have a symmetrical shape and have a common structure. That is, the shape of the first heat shield plate 31 is the same as the shape of the second heat shield plate 32. Therefore, the heat shield plates 31 and 32 can be shared and used. This makes it possible to reduce the types of components of the water heater 1. The shape of the third heat shield plate 33 is different from the shapes of the first heat shield plate 31 and the second heat shield plate 32. If the length of the heat shield plates 31, 32, 33 in the Z direction is, for example, 20% or more with respect to the length of the housing 2 in the Z direction, the heat shield plates 31, 32, 33 may be the heat exchanger 5, etc. It has a heat shielding effect that shields heat and a reinforcing effect that reinforces the strength of the housing 2. In the water heater 1 shown in FIGS. 1 to 3, the length of the heat shield plates 31, 32, 33 in the Z direction is, for example, about 28% of the length of the housing 2 in the Z direction. However, the ratio of the lengths of the heat shield plates 31, 32, 33 in the Z direction to the length of the housing 2 in the Z direction is not limited to this.

Next, the first heat shield plate 31 and the second heat shield plate 32 will be described in detail with reference to FIGS. 6 to 9.
FIG. 6 is a front view showing the first heat shield plate and the second heat shield plate.
FIG. 7 is a perspective view showing the first heat shield plate and the second heat shield plate.
FIG. 8 is a side view showing the first heat shield plate and the second heat shield plate.
FIG. 9 is a cross-sectional view showing a first heat shield plate and a second heat shield plate.
Note that FIG. 8A is a side view of the first heat shield plate and the second heat shield plate viewed from the direction of the arrow T1 shown in FIG. 7. FIG. 8B is a side view of the first heat shield plate and the second heat shield plate as viewed from the direction of the arrow T2 shown in FIG. 7. 9 (a) is a cross-sectional view of the cut planes A1-A1 shown in FIG. 9 (b) is a cross-sectional view of the cut planes B1-B1 shown in FIG.

As shown in FIGS. 6 and 7, the heat shield plates 31 and 32 are rectangular metal molded plates. The heat shield plates 31 and 32 have a vertically symmetrical shape in the B1-B1 line of FIG. As a result, the heat shield plates 31 and 32 can be commonly used for both the left and right side plates 10 and 11 shown in FIG. Therefore, it is not necessary to prepare heat shield plates having different shapes for the left and right side plates 10 and 11, so that the types of components to be prepared for the water heater 1 can be reduced.

One end 31A side of the heat shield plate 31 shown in FIG. 7 is located on the front end portion 10A side of the side plate 10 shown in FIG. 3, and the one end portion 32A side of the heat shield plate 32 shown in FIG. 7 is the side plate shown in FIG. It is located on the front end portion 11A side of 11. The other end 31B of the heat shield plate 31 shown in FIG. 7 and the other end 32B of the heat shield plate 32 are located on the back plate 14 side shown in FIG.

As shown in FIGS. 7 and 8, a first protruding portion 41 is provided on the upper end portions (one end portion) 31C (32C) of the heat shield plates 31 and 32. The upper end portion 31C (32C) of the present embodiment corresponds to the "one end portion" of the present invention. The first protruding portion 41 is a portion formed by bending the end portion of the metal plate, and is formed over a part of the length of the upper end portion 31C (32C) or the entire length. Similarly, a second protruding portion 42 is provided at the lower end portion (the other end portion) 31D (32D). The lower end 31D (32D) of the present embodiment corresponds to the "other end" of the present invention. The second protruding portion 42 is a portion formed by bending the end portion of the metal plate, and is formed over a part of the length of the lower end portion 31D (32D) or the entire length.

Further, as shown in FIGS. 7 to 9, a claw-shaped mounting portion 50 is provided at an intermediate position between one end portion 31A of the heat shield plate 31 and one end portion 32A of the heat shield plate 32. Specifically, the claw-shaped mounting portion 50 has a first protruding portion 41 and a second protruding portion 42 at one end portion 31A (32A) intersecting the upper end portion 31C (32C) and the lower end portion 31D (32D). It is provided at a position between. The mounting portion 50 has a claw-shaped structure in which a metal plate is bent , and the heat shield plate 31 with respect to the front end portion 10A of the left side plate 10 and the front end portion 11A of the right side plate 11 shown in FIG. , 32 are for fixing, respectively.

The claw-shaped mounting portion 50 preferably has a slit portion 10H (see FIGS. 1 and 3) provided on the front side of the left side plate 10 and a slit portion 11H provided on the front side of the right side plate 11 (see FIGS. 1 and 3). (See FIGS. 1 and 3) and, respectively. As a result, one end 31A of the first heat shield 31 and one end 32A of the second heat shield 32 are fitted into the front end 10A of the side plate 10 and the front end 11A of the right side plate 11, respectively. It is said that it can be fixed.

As shown in FIGS. 6 and 7, the other end portion 31B of the first heat shield plate 31 and the other end portion 32B of the second heat shield plate 32 have two fixed portions 60. The other ends 31B and 32B of the present embodiment correspond to the "rear end" of the present invention. As shown in FIG. 3, the other end portion 31B of the first heat shield plate 31 and the other end portion 32B of the second heat shield plate 32 are screwed at the fixing portion 60 with respect to the inner surfaces of the left and right side plates 10 and 11. Each can be fixed by (fastening member) 61. That is, the fixed portion 60 corresponds to "at least a part of the rear end portion" of the present invention.

In FIGS. 3 and 6, both of the two fixing portions 60 are fixed to the inner surfaces of the left and right side plates 10 and 11 by using screws 61, respectively. However, the fixed form of the fixed portion 60 is not limited to this. One of the two fixing portions 60 is fixed to the inner surfaces of the left and right side plates 10 and 11 using screws 61, and one of the two fixing portions 60 is between the left side plate 10 and the back plate 14 and the other of the two fixing portions 60. It may be sandwiched and held between the right side plate 11 and the back plate 14. The details will be described later.

Next, the third heat shield plate 33 will be described with reference to FIG.
FIG. 10 is a diagram showing a third heat shield plate.
Note that FIG. 10A is a front view showing the third heat shield plate. 10 (b) is a side view when the third heat shield plate is viewed from the direction of the arrow T12 shown in FIG. 10 (a). FIG. 10 (c) is a side view when the third heat shield plate is viewed from the direction of the arrow T13 shown in FIG. 10 (a).

As shown in FIG. 10, the third heat shield plate 33 is a rectangular metal molded plate having heat resistance. The third heat shield plate 33 has two protrusions 39. The third heat shield plate 33 is fixed to the back plate 14 by an operator passing a screw (fastening member) 37 through the hole 39H of the protrusion 39 and screwing it into the female screw of the back plate 14 shown in FIG. The heat shield plates 31, 32, and 33 are arranged so as to correspond to the left and right side plates and the back surface of the heat exchanger 5 shown in FIG. Moreover, as shown in FIG. 2, the front cover 3 has a heat shield plate 3R provided inside the front cover 3. As a result, the front surface, the left and right side plates, and the back surface of the heat exchanger 5 are thermally shielded by the heat shield plates 31, 32, 33 and the heat shield plate 3R of the front cover 3. Therefore, in the housing 2, the heat generated from the heat exchanger 5 can be shielded as much as possible from being transmitted to the outside of the housing 2.

FIG. 11 is a cross-sectional view taken along the cut surface AA shown in FIG.
FIG. 12 is a cross-sectional view of the cut surface BB shown in FIG.
An example of the mounting structure of the heat shield plates 31, 32, 33 will be further described with reference to FIGS. 11 and 12.

11 and 12 show an example of a mounting structure of the back plate 14 and the third heat shield plate 33 shown in FIG. 1, and an example of a mounting structure of the right side plate 11 and the second heat shield plate 32. The example of the mounting structure of the right side plate 11 and the second heat shield plate 32 and the example of the mounting structure of the left side plate 10 and the first heat shield plate 31 are symmetrical to each other. An example of the mounting structure of the back plate 14 and the third heat shield plate 33 and an example of the mounting structure of the right side plate 11 and the second heat shield plate 32 will be described as a representative with reference to 11 and FIG.

First, with reference to FIG. 11, an example of a mounting structure of the back plate 14 and the third heat shield plate 33, and an example of a mounting structure of the right side plate 11 and the second heat shield plate 32 will be described. However, for convenience of explanation, a part of the second heat shield plate 32 and the third heat shield plate 33 is omitted.
As shown in FIG. 11, the slit portion 11H is a narrow groove provided in the front end portion 11A of the right side plate 11. The claw-shaped mounting portion 50 of the second heat shield plate 32 is mounted by being fitted into the slit portion 11H of the right side plate 11.

On the other hand, as shown in FIG. 11, the protruding portion 39 of the third heat shield plate 33 covers the bulging portion 14G of the back plate 14. The screw 37 is passed through the hole 39H (see FIG. 10) of the protruding portion 39 of the third heat shield plate 33 and screwed into the female screw 38 of the back plate 14. As a result, the third heat shield plate 33 is fixed to the back plate 14. The range RD shown in FIG. 11 indicates a region of the housing 2 that is not covered by the second heat shield plate 32 and the third heat shield plate 33. Even if this range RD exists, the heat shield capacity of the heat exchanger and the reinforcing capacity of the housing 2 are secured.

Next, with reference to FIG. 12, an example of a mounting structure of the back plate 14 and the second heat shield plate 32 will be described. However, for convenience of explanation, a part of the second heat shield plate 32 is omitted.

As shown in FIG. 12, the other end portion 32B of the second heat shield plate 32 is an end portion located on the inner side of the housing 2. The fixing portion 60 of the other end 32B of the second heat shield plate 32 is fixed by being sandwiched between the inner end portion 14M of the back plate 14 and the inner surface of the right side plate 11. Moreover, the fixing portion 60 of the side plate 11 is provided with a screw hole 60H (see FIG. 7). The screw 61 is screwed into the female screw 14W of the inner end portion 14M of the back plate 14 through the screw hole 60H of the fixing portion 60. As a result, the fixing portion 60 of the other end 32B of the second heat shield plate 32 is securely fixed by screwing while being sandwiched between the right side plate 11 and the back plate 14.

As described above with respect to FIGS. 6 to 9, the fixing portion 60 of the second heat shield plate 32 is sandwiched between the inner end portion 14M of the back plate 14 and the inner surface of the right side plate 11, so that the screws are used. Screwing with 61 is not always necessary. For example, one of the two fixed portions 60 is sandwiched between the inner end portion 14M of the back plate 14 and the inner surface of the right side plate 11, and either one of the two fixed portions 60 is the inner end of the back plate 14. It may be sandwiched between the portion 14M and the inner surface of the right side plate 11 and screwed by a screw 61.

FIG. 13 is a schematic diagram illustrating an example of operation of the first heat shield plate and the second heat shield plate of the present embodiment.
The operation of suppressing the curvature of the first heat shield plate 31 shown in FIG. 13 toward the side (direction of arrow XX) of the left side plate 10 (see FIGS. 5 (c) and 5 (d)) and the second shield. The action of the hot plate 32 suppressing the bending (see FIGS. 5 (c) and 5 (d)) of the right side plate 11 toward the side (direction of arrow XX) is symmetrical with each other and substantially. It is the same. Therefore, in FIG. 13, the operation of the first heat shield plate 31 to suppress the bending of the left side plate 10 toward the side (direction of arrow XX) will be described as a representative.
FIG. 13A shows a normal state before the left side plate 10 is curved sideways (in the direction of arrow XX). FIG. 13B is a schematic view showing a state in which the first heat shield plate 31 suppresses the left side plate 10 from bending sideways (in the direction of arrow XX).

In FIG. 13A, the claw-shaped mounting portion 50 of the first heat shield plate 31 is already mounted by being fitted into the slit portion 10H of the left side plate 10. The upper first protruding portion 41 and the lower second protruding portion 42 of the first heat shield plate 31 are formed so as to project toward the inner surface 10N of the left side plate 10. At this time, a predetermined gap SS is between the upper first protruding portion 41 and the inner surface 10N of the left side plate 10 and between the lower second protruding portion 42 and the inner surface 10N of the left side plate 10. Is set. The gap SS is appropriately suppressed to the extent that the left side plate 10 and the right side plate 11 are prevented from bending sideways (in the direction of arrow XX) and the front cover 3 can be easily attached to the housing 2. Set.

As described above with respect to FIGS. 5 (a) to 5 (d), the heat exchanger 5, the blower fan 6, the circuit board portion 9, the bundled wires of the electrical wiring, pipes, etc. are packed and accommodated inside the housing 2. Then, as shown by the arrows XX shown in FIGS. 5 (c) and 5 (d), the side plates 10 and 11 of the housing 2 may be curved and swelled sideways. Then, when the operator removes the front cover 3 from the housing 2 for the installation work of the water heater 1, the left and right side plates 10 and 11 are changed from the normal state of FIG. 13 (a) to FIG. 13 (b). ), It bends sideways (in the direction of arrow XX) and tries to swell.

On the other hand, in the water heater 1 according to the present embodiment, as shown in FIG. 13B, when the left side plate 10 tries to bend sideways (in the direction of arrow XX), the first heat shield plate 31 The upper first protruding portion 41 and the lower second protruding portion 42 are in contact with the inner surface 10N of the left side plate 10. As a result, the first heat shield plate 31 can prevent the left side plate 10 from bending sideways (in the direction of arrow XX). Therefore, even if the operator removes the front cover 3 from the housing 2, the left side plate 10 is surely suppressed from bending sideways. Further, it is surely suppressed that the folded-back portion 20 jumps up in the direction of the arrow YY shown in FIG. 5 (d). As a result, the operator can easily attach the front cover 3 to the housing 2 again.

According to the water heater 1 according to the present embodiment, the first protruding portion 41 and the second protruding portion 42 of the first heat shield plate 31 have an inner surface of the left side plate 10 when the left side plate 10 tries to bend sideways. It comes into contact with 10N. Further, the first protruding portion 41 and the second protruding portion 42 of the second heat shield plate 32 come into contact with the inner surface of the right side plate 11 when the right side plate 11 tries to bend sideways. Therefore, even if the operator removes the front cover 3 from the housing 2, for example, the side plates 10 and 11 of the housing 2 are surely suppressed from bending sideways. Further, it is surely suppressed that the folded portions 20 and 21 of the side plates 10 and 11 jump toward the outside of the housing 2.

Further, the mounting portion 50 of the first heat shield plate 31 is fitted into the slit portion 10H provided at the front end portion 10A of the left side plate 10. As a result, the first heat shield plate 31 is easily attached to the slit portion 10H of the left side plate 10 and is securely fixed to the left side plate 10. Further, the mounting portion 50 of the second heat shield plate 32 is fitted into the slit portion 11H provided in the front end portion 11A of the right side plate 11. As a result, the second heat shield plate 32 is easily attached to the slit portion 11H of the right side plate 11 and is securely fixed to the right side plate 11.

Further, at least a part (fixing portion 60) of the other end portion 31B of the first heat shield plate 31 is fastened to the left side plate 10 by a screw 61. As a result, at least a part of the other end 31B of the first heat shield plate 31 is easily and surely fixed to the left side plate 10 by the screw 61. Further, at least a part (fixed portion 60) of the other end 32B of the second heat shield plate 32 is fastened to the right side plate 11 by a screw 61. As a result, at least a part of the other end 32B of the second heat shield plate 32 is easily and surely fixed to the right side plate 11 by the screw 61.

Further, at least a part (fixed portion 60) of the other end portion 31B of the first heat shield plate 31 may be sandwiched and held between the left side plate 10 and the back plate 14. In this case, at least a part of the other end 31B of the first heat shield plate 31 is easily fixed to the left side plate 10. Further, at least a part (fixed portion 60) of the other end 32B of the second heat shield plate 32 may be sandwiched and held between the right side plate 11 and the back plate 14. In this case, at least a part of the other end 32B of the second heat shield plate 32 is easily fixed to the right side plate 11.

The embodiment of the present invention has been described above. However, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of claims. The configuration of the above embodiment may be partially omitted or may be arbitrarily combined so as to be different from the above. The heat source of the water heater 1 is not limited to gas, oil, or the like. Further, the use of the water heater 1 is not particularly limited. For example, the water heater 1 may be a heat source machine for heating, a bath water heater, or the like, in addition to the water heater for hot water supply.

1, 1R ... water heater, 2 ... housing, 3 ... front cover, 3A ... exhaust port, 3R ... heat shield, 5 ... heat exchanger, 6 ... Blower fan, 7 ... gas burner, 8 ... exhaust part, 9 ... circuit board part, 10 ... side plate, 10A ... front end part, 10H ... slit part, 10N ... inner surface, 11 ... side plate, 11A ... front end, 11H ... slit, 12 ... top plate, 13 ... bottom plate, 14 ... back plate, 14G ... bulge, 14M ...・ ・ Inner end, 14W ・ ・ ・ Female screw, 15 ・ ・ ・ Opening, 20, 21, 22, 23 ・ ・ ・ Folded part, 31 ・ ・ ・ First heat shield, 31A ・ ・ ・ One end, 31B ... the other end, 31C ... the upper end, 31D ... the lower end, 32 ... the second heat shield, 32A ... one end, 32B ... the other end, 32C ... Upper end, 32D ... Lower end, 33 ... Third heat shield, 37 ... Screw, 38 ... Female screw, 39 ... Protruding part, 39H ... Hole, 41 ... No. 1 protruding part, 42 ... second protruding part, 50 ... mounting part, 60 ... fixed part, 60H ... screw hole, 61 ... screw, 200, 201 ... folded part, H・ ・ ・ Apartment house, K ・ ・ ・ Common corridor, PS1, PS2 ・ ・ ・ Pipe shaft, R1, R2, R3 ・ ・ ・ Dwelling unit, S ・ ・ ・ Formation width, SS ・ ・ ・ Gap, V ・ ・ ・ Formation Width, W, W1 ... Width

Claims (8)

A housing that houses a heat exchanger and has one side plate and the other side plate facing the one side plate .
A heat shield plate that is arranged inside the housing to shield the heat generated from the heat exchanger and suppress the side plate from bending laterally.
Equipped with
The heat shield has a first heat shield fixed to the inside of the one side plate and a second heat shield fixed to the inside of the other side plate.
Each of the first heat shield plate and the second heat shield plate has a first protruding portion provided at one end and a second protruding portion provided at the other end facing the one end. It has a portion and a mounting portion provided at a position between the first protruding portion and the second protruding portion at an end intersecting the one end and the other end.
The mounting portion of the first heat shield plate is fixed to the one side plate.
The mounting portion of the second heat shield plate is fixed to the other side plate.
The first protruding portion and the second protruding portion of the first heat shield plate come into contact with the inner surface of the one side plate when the one side plate tries to bend sideways.
A water heater characterized in that the first protruding portion and the second protruding portion of the second heat shield plate come into contact with the inner surface of the other side plate when the other side plate tries to bend laterally . The mounting portion has a claw-shaped structure in which the plate is bent.
The mounting portion of the first heat shield plate is fitted into a slit portion provided at the front end portion of the one side plate.
The water heater according to claim 1 , wherein the mounting portion of the second heat shield plate is fitted into a slit portion provided at the front end portion of the other side plate. The housing has a back plate extending in a direction intersecting the side plate at the rear portion and connected to the side plate.
The other at least a part of the rear end portion of the first heat shield plate is sandwiched and held between the one side plate and the back plate.
The first or second aspect of the present invention, wherein at least a part of the rear end portion of the second heat shield plate is sandwiched and held between the other side plate and the back plate. Water heater. A housing that houses a heat exchanger and has a side plate, the other side plate facing the one side plate, and a back plate extending in a direction intersecting the side plate at the rear portion and connected to the side plate .
A heat shield plate that is arranged inside the housing to shield the heat generated from the heat exchanger and suppress the side plate from bending laterally.
Equipped with
The heat shield has a first heat shield fixed to the inside of the one side plate and a second heat shield fixed to the inside of the other side plate.
The other at least a part of the rear end portion of the first heat shield plate is sandwiched and held between the one side plate and the back plate.
A water heater characterized in that at least a part of the rear end portion of the second heat shield plate is sandwiched and held between the other side plate and the back plate . Each of the first heat shield plate and the second heat shield plate has a first protruding portion provided at one end and a second protruding portion provided at the other end facing the one end. It has a portion and a mounting portion provided at a position between the first protruding portion and the second protruding portion at an end intersecting the one end and the other end.
The mounting portion of the first heat shield plate is fixed to the one side plate.
The mounting portion of the second heat shield plate is fixed to the other side plate.
The first protruding portion and the second protruding portion of the first heat shield plate come into contact with the inner surface of the one side plate when the one side plate tries to bend sideways.
4. The fourth aspect of the present invention is characterized in that the first protruding portion and the second protruding portion of the second heat shield plate come into contact with the inner surface of the other side plate when the other side plate tries to bend laterally. The water heater described. The mounting portion has a claw-shaped structure in which the plate is bent.
The mounting portion of the first heat shield plate is fitted into a slit portion provided at the front end portion of the one side plate.
The water heater according to claim 5, wherein the mounting portion of the second heat shield plate is fitted into a slit portion provided at the front end portion of the other side plate. The water heater according to any one of claims 1 to 6 , wherein the shape of the first heat shield plate is the same as the shape of the second heat shield plate. At least a part of the rear end portion of the first heat shield plate is fastened to the one side plate by a fastening member.
The water heater according to any one of claims 1 to 7 , wherein at least a part of the rear end portion of the second heat shield plate is fastened to the other side plate by a fastening member. ..

Images