JP7225591B2 - water heater - Google Patents

Description

The present invention relates to a water heater.

2. Description of the Related Art Conventionally, a hot water supply apparatus having a rainproof plate arranged in a case so as to face an air supply hole provided in the case is disclosed, for example, in Japanese Patent Application Laid-Open No. 9-296961 (Patent Document 1). In the hot water supply apparatus described in this publication, raindrop returners are provided together with air supply openings at the upper end of the rainproof plate. The rainproof plate and the raindrop return suppress moisture from entering the case.

JP-A-9-296961

However, in the hot water supply apparatus described in the above publication, the raindrop returner is provided at the upper end of the rainproof plate together with the air supply opening. Therefore, the air supply opening becomes narrower due to the return of raindrops, and the air supply resistance increases. Moreover, if the raindrop return is increased, the air supply resistance increases, so the raindrop return cannot be increased. Therefore, the effect of removing water by returning raindrops is insufficient.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object thereof is to provide a hot water supply apparatus capable of increasing the moisture removing effect while reducing air supply resistance.

A water heater of the present invention includes a case, an internal member, and an inclined portion. The internal member is disposed within the case and has an air supply opening that opens upward within the case. The ramp is located above the inlet opening of the inner member. The inclined portion is inclined downward from above.

According to the hot water supply apparatus of the present invention, the inclined portion is located above the air supply opening, and thus is separated from the air supply opening. Thereby, a large area of the air supply opening can be ensured. Therefore, air supply resistance can be reduced. In addition, since the inclined portion is positioned above the air supply opening, the inclined portion can be enlarged while reducing air supply resistance. Since the inclined portion is exposed to the air supplied from the air supply opening, the moisture removing effect of the inclined portion can be increased. Furthermore, since the inclined portion is inclined downward from above, it becomes easy to drop the water adhering to the inclined portion along the inclined portion. This can further enhance the moisture removing effect.

In the water heater described above, the case includes a wall portion having an air supply hole, a first space formed between the wall portion and the internal member, and a second space located above the internal member. An inclined portion is arranged above an air supply opening that communicates with the air supply hole and connects the first space and the second space. Therefore, the internal member and the slanted portion can prevent moisture from entering the case through the air supply hole.

In the water heater described above, the inclined portion is inclined downward toward the wall portion. Therefore, the supplied air flows obliquely upward along the inclined portion. Therefore, air supply resistance can be reduced.

In the above hot water supply apparatus, the air supply opening is positioned directly below the lowest end of the inclined portion. For this reason, the moisture that has flowed obliquely downward along the inclined portion drops from the lowest end of the inclined portion to the air supply opening. Moisture can thus be returned to the inner member through the air supply opening.

The water heater described above further includes an air supply guide section connected to the inclined section. The air supply guide portion is configured to guide the air supplied from the air supply opening to the inside of the case through the inclined portion. For this reason, the air supply guiding portion can smoothly flow the supplied air into the case. Therefore, air supply resistance can be reduced.

In the water heater described above, the internal member is at least one of a rainproof plate and a duct. Therefore, the degree of freedom in designing the internal member can be improved.

The water heater described above further includes an exhaust section for exhausting combustion gas to the outside of the case. The ramp is integrally attached to the exhaust. Therefore, the strength of the inclined portion can be improved. Therefore, even if an operator touches the inclined portion when the exhaust portion is attached to or detached from the case during assembly or maintenance, the inclined portion is less likely to bend.

As described above, according to the present invention, it is possible to provide a hot water supply apparatus capable of increasing the moisture removing effect while reducing the air supply resistance.

1 is a cross-sectional view schematically showing the configuration of a hot water supply apparatus according to an embodiment of the present invention; FIG. It is a perspective view showing roughly composition of a cover body in one embodiment of the present invention. FIG. 2 is a cross-sectional view schematically showing the configuration of a hot water supply apparatus according to Modification 1 of an embodiment of the present invention; FIG. 4 is an enlarged cross-sectional view schematically showing a configuration of a modification of the inclined portion included in the hot water supply apparatus of Modification 1 of the embodiment of the present invention; FIG. 10 is a cross-sectional view schematically showing the configuration of a hot water supply apparatus according to Modification 2 of the embodiment of the present invention;

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. In the drawings below, the same or corresponding parts are denoted by the same reference numerals, and redundant description will not be repeated.

A configuration of water heater 100 according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. A hot water supply apparatus 100 according to an embodiment of the present invention includes a case 1, a burner 2, a fan 3, a heat exchanger 4, an exhaust collecting tube 5, an internal member 10, an inclined portion 20, and an air supply guide. A part 30 is mainly provided.

A burner 2 , a fan 3 , a heat exchanger 4 , an exhaust collecting tube 5 , an internal member 10 , an inclined portion 20 , and an air supply guiding portion 30 are accommodated in the case 1 . The case 1 has a main body portion 1a and a front cover (wall portion) 1b. The body portion 1a has an internal space surrounded by an outer wall. The body portion 1a has an open portion 1a2 surrounded by a first end face 1a1 provided on the front cover 1b side. The open portion 1a2 communicates with the internal space of the body portion 1a.

The front cover 1b is attached to the body portion 1a. Specifically, a second end face 1b1 provided on the body portion 1a side of the front cover 1b is attached to a first end face 1a1 of the body portion 1a. The front cover 1b is arranged to cover the open portion 1a2 in a state where the front cover 1b is attached to the main body portion 1a.

The front cover 1b has an air supply hole H1. The air supply hole H1 is provided in the front portion of the front cover 1b. The air supply hole H1 is for taking air into the case 1 from outside the case 1 . In rainy weather, moisture such as raindrops and fog in the air is taken into the case 1 from the air supply hole H1 together with the air. In one embodiment of the invention, a plurality of air supply holes H1 are provided. The multiple air supply holes H1 constitute an air supply portion AP. The air supply part AP is provided on the front surface of the case 1 .

The front cover 1b is configured to have a space in a region inside a portion that protrudes from the body portion 1a to the front side of the case 1. As shown in FIG. The front cover 1b has a drain port DP. The drain port DP is provided on the bottom surface of the projecting portion of the front cover 1b. In addition, the air supply hole H1 may be provided in the side portion of the front cover 1b.

The burner 2 is configured to be able to supply combustion gas. The combustion gas is for heat exchange with the water in the heat exchanger 4 . The fan 3 is for supplying combustion air to the burner 2 . The fan 3 is configured to blow the air taken into the case 1 to the burner 2 .

The heat exchanger 4 is configured such that heat exchange takes place between the combustion gas supplied by the burner 2 and the water flowing inside the heat exchanger 4 . The heat exchanger 4 has heat transfer tubes through which water can flow, fins attached to the heat transfer tubes, and a heat exchanger case that accommodates the heat transfer tubes and the fins. Combustion gas flows around the heat transfer tubes and fins in the heat exchanger case. Heat is exchanged between the combustion gas and water flowing through the heat transfer tubes.

The heat exchanger 4 is connected to the exhaust collecting pipe 5 . The heat exchanger 4 is arranged upstream of the exhaust manifold 5 in the flow of combustion gas. The exhaust collecting pipe 5 is for collecting the combustion gas that has passed through the heat exchanger 4 and discharging it to the outside of the water heater 100 .

The exhaust collecting tube 5 has an exhaust portion 5a and an exhaust passage portion 5b. The exhaust part 5 a is for exhausting combustion gas to the outside of the case 1 . The exhaust part 5 a is arranged on the front surface of the case 1 . The exhaust portion 5a protrudes from the inside of the case 1 to the outside of the case 1 through a through hole H2 provided in the front cover 1b.

The exhaust passage portion 5 b is connected to the heat exchanger 4 . The exhaust passage portion 5b is configured to guide the combustion gas flowing from the heat exchanger 4 to the exhaust portion 5a. The combustion gas that has flowed into the exhaust passage portion 5b passes through the exhaust passage portion 5b, flows into the exhaust portion 5a, and is exhausted from the exhaust portion 5a.

The internal member 10 is arranged inside the case 1 . The internal member 10 is arranged on the rear side of the front cover 1b. The internal member 10 has an air supply opening OP that opens upward within the case 1 . The air supply opening OP is arranged above the height position of the air supply portion AP.

The inclined portion 20 is positioned above the air supply opening OP. The inclined portion 20 is inclined downward from above. The inclined portion 20 is arranged so as to vertically overlap the air supply opening OP. Inclined portion 20 is configured, for example, in a plate shape. In addition, it is sufficient that the lower surface of the inclined portion 20 is inclined downward from above.

In one embodiment of the present invention, the internal member 10 is attached to the rear portion of the front cover 1b. The front cover 1b and the internal member 10 constitute a cover body CP. The front cover 1b and the internal member 10 are integrally formed as a cover body CP.

In one embodiment of the invention, the inner member 10 is a rain barrier 10a. The rainproof plate 10a prevents raindrops that have entered the case 1 from the air supply hole H1 from adhering to the components of the water heater 100 such as the burner 2. As shown in FIG. The rainproof plate 10a is arranged at a distance from the projecting portion of the front cover 1b in order to secure a passage for supplying air. The rainproof plate 10a suppresses the penetration of raindrops mixed with supply air. Moreover, the rainproof plate 10a is configured to promote the dropping and adhesion of raindrops while the air supply passage to the fan 3 is temporarily detoured upward by the rainproof plate 10a.

The rainproof plate 10a is arranged between the front cover 1b, the burner 2, the fan 3, and the heat exchanger 4. As shown in FIG. The rainproof plate 10a extends from the bottom surface of the case 1 toward the top surface. That is, the rainproof plate 10a extends upward. The rainproof plate 10a extends from the bottom surface of the case 1 toward the top surface closer to the top surface than the bottom surface. The rainproof plate 10a is arranged below the exhaust portion 5a. The rainproof plate 10a extends over substantially the entire width of the case 1 .

Case 1 has a first space SP1 and a second space SP2. The first space SP1 is defined between the front cover 1b and the internal member 10. As shown in FIG. In one embodiment of the present invention, the region inside the projecting portion of the front cover 1b covered with the rainproof plate 10a constitutes the first space SP1. A first space SP1 between the rainproof plate 10a and the front cover 1b constitutes a flow path for air taken into the case 1 from the air supply hole H1. Air taken into the case 1 through the air supply hole H1 flows upward through the first space SP1.

The second space SP2 is positioned above the internal member 10 . The second space SP2 is located above the air supply opening OP. The second space SP2 is positioned below the exhaust manifold 5 . The air supply opening OP communicates with the air supply hole H1. The air supply opening OP connects the first space SP1 and the second space SP2. An inclined portion 20 is arranged above the air supply opening OP.

The inclined portion 20 is inclined downward as it approaches the front cover 1b. That is, the inclined portion 20 is inclined upward as it approaches the back surface of the case 1 . The inclined portion 20 has a downward slope. The inclined portion 20 may be linearly inclined.

An air supply opening OP is positioned directly below the lowest end of the inclined portion 20 . The center of the air supply opening OP may be positioned directly below the lowest end of the inclined portion 20 . Further, the drain port DP of the front cover 1b may be positioned directly below the lowest end of the inclined portion 20. As shown in FIG.

The inclined portion 20 is integrally attached to the exhaust portion 5a. The inclined portion 20 may be integrally attached to the lower surface of the exhaust portion 5a.

The air supply guide portion 30 is configured to continue to the inclined portion 20 . The air supply guide portion 30 is configured to guide the supplied air from the air supply opening OP to the inside of the case 1 through the inclined portion 20 . The air supply guide portion 30 is arranged on the opposite side of the inclined portion 20 to the front cover 1b. The air supply guide portion 30 may be attached to the lower surface of the exhaust collecting pipe 5 . The air supply guide portion 30 may extend downward from the lower surface of the exhaust collecting pipe 5 . The air supply guide portion 30 may be configured such that the distance from the inclined portion 20 increases downward.

The air supply guide portion 30 is a member that supports the heat exchanger 4 with respect to the exhaust collecting pipe 5, for example. Specifically, the air supply guide portion 30 is fixed to the exhaust collecting pipe 5 with screws or the like. Further, the supply air guide portion 30 sandwiches the flange portion 4 a projecting outward from the heat exchanger 4 and the exhaust collecting pipe 5 .

The air supply guide portion 30 has an attachment portion 30a, an extension portion 30b, and a pressing portion 30c. The attachment portion 30a is a portion attached to the exhaust collecting pipe 5 with a screw or the like. The extending portion 30b is a portion extending downward from the mounting portion 30a. The pressing portion 30 c is a portion that bends from the lower end of the extending portion 30 b and sandwiches the flange portion 4 a of the heat exchanger 4 with the exhaust collecting pipe 5 .

The air that has passed through the inclined portion 20 flows sideways along the attachment portion 30 a of the air supply guide portion 30 . Further, the air that has passed through the attachment portion 30a becomes a downward flow by flowing along the extension portion 30b. In this manner, the air supply guide section 30 can smoothly change the flow of air. Therefore, the supply air can be smoothly guided from the inclined portion 20 into the case 1 by the supply air guide portion 30 .

Next, referring to FIG. 1, a description will be given of how the moisture taken into the case 1 together with the air is discharged to the outside of the case 1. FIG.

As indicated by solid line arrows in FIG. 1, air is taken into the case 1 from the plurality of air supply holes H1 and flows upward through the first space SP1. The air that has passed through the first space SP1 flows into the second space SP2 through the air supply opening OP. The air that has passed through the second space SP2 flows downward through the space between the rainproof plate 10a, the heat exchanger 4 and the burner 2, and is sucked into the fan 3.

In rainy weather, moisture such as raindrops and fog in the air is taken into the case 1 from the plurality of air supply holes H1 together with the air. This moisture, together with the air, flows upward through the first space SP1 and contacts the lower surface of the inclined portion 20 through the air supply opening OP. At this time, water adheres to the lower surface of the inclined portion 20 . Moisture adhering to the lower surface of the inclined portion 20 flows along the lower surface of the inclined portion 20 toward the lowermost end of the inclined portion 20 and falls from the lowermost end of the inclined portion 20 toward the air supply opening OP. As indicated by the dashed arrow in FIG. 1, the moisture that has fallen into the air supply opening OP passes through the first space SP1 and is discharged out of the case 1 through the drain port DP. In addition, moisture that has fallen into the air supply opening OP may be discharged outside the case 1 through the gap between the rainproof plate 10a and the front cover 1b.

Next, with reference to FIG. 3, hot water supply apparatus 100 of Modification 1 of the embodiment of the present invention will be described. In hot water supply apparatus 100 of Modification 1 according to one embodiment of the present invention, inclined portion 20 is attached to the front surface portion of front cover 1b. The inclined portion 20 may extend from the front surface of the front cover 1b to the rainproof plate 10a above the air supply opening OP. In Modified Example 1 of the embodiment of the present invention, the inclined portion 20 and the front cover 1b can be integrally formed by using the inclined portion 20 as the cover body CP. Therefore, the degree of freedom in designing the inclined portion 20 can be improved.

Next, with reference to FIG. 4, a modification of inclined portion 20 included in hot water supply apparatus 100 of Modification 1 of the embodiment of the present invention will be described.

FIG. 4A is an enlarged cross-sectional view showing Modification 1 of the inclined portion 20. As shown in FIG. Referring to FIG. 4A, in Modification 1 of inclined portion 20, inclined portion 20 includes support portion 21 supported by front cover 1b and tip end portion 22 connected to support portion 21. there is The support portion 21 is inclined so as to be positioned downward with distance from the front cover 1b. The distal end portion 22 is inclined so as to be positioned downward as it approaches the front cover 1b. The support portion 21 and the tip portion 22 are connected at the lowest end of the inclined portion 20 . The inclined portion 20 is configured in a substantially V shape.

As indicated by solid arrows in FIG. 4A, the air that has passed through the air supply opening OP flows obliquely upward along the lower surface of the tip portion 22 and then obliquely downward. As indicated by the dashed arrow in FIG. 4A, the moisture passing through the air supply opening OP together with the air adheres to the lower surface of the inclined portion 20 and falls from the lowest end of the inclined portion 20 to the air supply opening OP. do.

FIG. 4B is an enlarged cross-sectional view showing Modification 2 of the inclined portion 20 described above. Referring to FIG. 4B, in Modified Example 2 of inclined portion 20, support portion 21 is not inclined. That is, the support portion 21 is perpendicular to the front cover 1b. In the modified example 2 of the inclined portion 20 as well, the support portion 21 and the tip portion 22 are connected at the lowest end of the inclined portion 20 .

As indicated by solid arrows in FIG. 4B, the air that has passed through the air supply opening OP flows obliquely upward along the lower surface of the tip portion 22 and then obliquely downward. As indicated by the dashed arrow in FIG. 4B, the moisture passing through the air supply opening OP together with the air adheres to the lower surface of the inclined portion 20 and falls from the lowest end of the inclined portion 20 to the air supply opening OP. do.

FIG. 4C is an enlarged cross-sectional view showing Modification 3 of the inclined portion 20 described above. Referring to FIG. 4(C), in Modified Example 3 of inclined portion 20, support portion 21 is inclined so as to be positioned downward as it approaches front cover 1b. A gap GP is provided between the tip portion 22 and the front portion of the front cover 1b.

As indicated by solid line arrows in FIG. 4C, part of the air that has passed through the air supply opening OP flows obliquely upward along the lower surface of the tip portion 22 and then obliquely downward. . In addition, the other part of the air that has passed through the air supply opening OP flows upward through the gap GP, then flows obliquely downward, and flows along the upper surface of the inclined portion 20 toward the gap GP. .

As indicated by the dashed arrow in FIG. 4(C), the moisture passing through the air supply opening OP together with part of the air adheres to the lower surface of the inclined portion 20, and the air supply opening moves from the lowermost end of the inclined portion 20 to the air supply opening OP. Fall to OP. In addition, moisture that has passed through the air supply opening OP together with other parts of the air adheres to the upper surface of the inclined portion 20, flows along the upper surface of the inclined portion 20, and is supplied from the lowest end of the tip portion 22 through the gap GP. Drops into air opening OP.

Next, hot water supply apparatus 100 of Modification 2 of the embodiment of the present invention will be described with reference to FIG. In hot water supply apparatus 100 of modification 2 according to an embodiment of the present invention, internal member 10 is duct 10b. The duct 10b is configured in a tubular shape. A lower end of the duct 10b protrudes outside the case 1 from the lower surface of the front cover 1b. An air supply hole H1 is provided at the lower end of the duct 10b. The upper end of the duct 10b is arranged inside the case 1. As shown in FIG. An air supply opening OP is provided at the upper end of the duct 10b. The duct 10b is provided with an internal space that connects the air supply hole H1 and the air supply opening OP. An inclined portion 20 is positioned above the air supply opening OP provided at the upper end of the duct 10b.

As indicated by solid arrows in FIG. 5, air is drawn into the duct 10b through an air supply hole H1 provided at the lower end of the duct 10b and flows upward through the duct 10b. The air that has passed through the duct 10b flows downward through the space between the duct 10b and the heat exchanger 4 and the burner 2 through the air supply opening OP and is sucked into the fan 3 .

Moisture that has passed through the air supply opening OP together with the air adheres to the lower surface of the inclined portion 20 . Moisture adhering to the lower surface of the inclined portion 20 flows along the lower surface of the inclined portion 20 toward the lowermost end of the inclined portion 20 and falls from the lowermost end of the inclined portion 20 toward the air supply opening OP. As indicated by the dashed arrow in FIG. 1, the moisture that has fallen into the air supply opening OP passes through the inside of the duct 10b and is discharged out of the case 1 through the air supply hole H1.

Next, the effects of this embodiment will be described.
According to hot water supply apparatus 100 in the present embodiment, sloped portion 20 is positioned above air supply opening OP and thus is spaced from air supply opening OP. Thereby, a large area of the air supply opening OP can be ensured. Therefore, air supply resistance can be reduced. Further, since the inclined portion 20 is positioned above the air supply opening OP, the inclined portion can be enlarged while reducing the air supply resistance. Since the inclined portion 20 is exposed to the air supplied from the air supply opening OP, the moisture removing effect of the inclined portion 20 can be increased. Furthermore, since the inclined portion 20 is inclined downward from above, it becomes easy to drop the water adhering to the inclined portion 20 along the inclined portion 20 . This can further enhance the moisture removing effect.

In hot water supply apparatus 100 in the present embodiment, case 1 includes front cover 1b having air supply hole H1, first space SP1 formed between front cover 1b and internal member 10, and above internal member 10. and a second space SP2 located. An inclined portion 20 is arranged above the air supply opening OP that communicates with the air supply hole H1 and connects the first space SP1 and the second space SP2. Therefore, the internal member 10 and the inclined portion 20 can prevent moisture from entering the interior of the case 1 through the air supply hole H1.

In hot water supply apparatus 100 in the present embodiment, inclined portion 20 is inclined so as to be positioned downward as it approaches front cover 1b. Therefore, the supply air flows obliquely upward along the inclined portion 20 . Therefore, air supply resistance can be reduced.

In hot water supply apparatus 100 in the present embodiment, air supply opening OP is positioned directly below the lowest end of inclined portion 20 . Therefore, the moisture that has flowed obliquely downward along the inclined portion 20 drops from the lowest end of the inclined portion 20 into the air supply opening OP. Therefore, moisture can be returned to the inner member 10 through the air supply opening OP.

In hot water supply apparatus 100 in the present embodiment, air supply guide portion 30 is configured to guide the supplied air from air supply opening OP through inclined portion 20 to the inside of case 1 . Therefore, the supplied air can smoothly flow into the case 1 by the supplied air guiding portion 30 . Therefore, air supply resistance can be reduced.

In hot water supply apparatus 100 in the present embodiment, internal member 10 is at least one of rainproof plate 10a and duct 10b. Therefore, the degree of freedom in designing the internal member 10 can be improved.

In hot water supply apparatus 100 in the present embodiment, inclined portion 20 is integrally attached to exhaust portion 5a. Therefore, the strength of the inclined portion 20 can be improved. Therefore, even if an operator touches the inclined portion 20 when the exhaust portion 5a is attached to or detached from the case 1 during assembly or maintenance, the inclined portion 20 is less likely to bend.

The embodiments disclosed this time are illustrative in all respects and should be considered not restrictive. The scope of the present invention is indicated by the scope of the claims rather than the above-described embodiments, and is intended to include meanings equivalent to the scope of the claims and all modifications within the scope.

1 case, 1a main body, 1b front cover, 2 burner, 3 fan, 4 heat exchanger, 5 exhaust collecting tube, 5a exhaust part, 5b exhaust passage, 10 internal member, 10a rainproof plate, 10b duct, 20 inclination Part 21 Support Part 22 Tip Part 30 Air Supply Guide Part 100 Water Heater H1 Air Supply Hole OP OP Air Supply Opening SP1 First Space SP2 Second Space.

Claims (5)

a case;
an internal member disposed within the case and having an air supply opening that opens upward within the case;
an inclined portion positioned above the air supply opening of the internal member;
The inclined portion is inclined downward from above,
further comprising an air supply guide portion connected to the inclined portion;
The air supply guide portion is configured to guide the air supply from the air supply opening to the interior of the case from the inclined portion,
further comprising an exhaust portion for exhausting combustion gas to the outside of the case;
The inclined portion is integrally attached to the exhaust portion,
The air supply guide portion has an attachment portion and an extension portion,
The attachment portion is attached to the exhaust portion,
The water heater , wherein the extending portion extends downward from the mounting portion . The case includes a wall portion having an air supply hole, a first space formed between the wall portion and the internal member, and a second space located above the internal member,
2. The water heater according to claim 1, wherein said inclined portion is arranged above said air supply opening communicating with said air supply hole and connecting said first space and said second space. 3. The hot water supply apparatus according to claim 2, wherein said inclined portion is inclined downward as it approaches said wall portion. The hot water supply apparatus according to any one of claims 1 to 3, wherein said air supply opening is positioned immediately below the lowest end of said inclined portion. 2. The water heater according to claim 1, wherein said internal member is at least one of a rainproof plate and a duct.

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