JP2021183881A - Water heater - Google Patents

Abstract

To provide a water heater that can prevent electronic components incorporated in a housing from being wet by water entering the housing from outside.SOLUTION: A case 10 includes: a recess part 10i provided in a part that is positioned outdoor; and an inner flange part 10f for covering the recess part 10i. The recess part 10i is provided with a first communication hole 10j communicating with the outside of the case 10. The inner flange part 10f is provided with a second communication hole 10k communicating with the inside of the case 10. The first communication hole 10j and the second communication hole 10k are provided in mutually shifted positions when being viewed from a direction where the recess part 10i overlaps the inner flange part 10f.SELECTED DRAWING: Figure 3

Description

The present invention relates to a hot water supply device in which at least a part of a housing is installed outdoors to heat and supply hot water.

Conventionally, there is a hot water supply device in which a part of the housing is installed outdoors and the introduced hot water is heated and supplied. It is known that this type of hot water supply device is equipped with a heat exchanger for heating hot water, electrical components for controlling the heat exchanger, and a housing for accommodating the heat exchanger and the electrical components. (See, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2018-84379

By the way, in the hot water supply device of Patent Document 1, a part of the housing is arranged outdoors. Therefore, water may be splashed on the part arranged outdoors at the time of cleaning or the like. In addition, the part may be exposed to rainwater.

Then, in such a case, the water infiltrates into the inside of the housing through openings such as a drain hole, an air supply / exhaust port, etc. provided in the portion arranged outdoors, and the internal electrical components are removed. There was a risk of getting wet.

The present invention has been made in view of the above points, and provides a hot water supply device capable of preventing the electronic components built in the housing from getting wet due to water infiltrated from the outside of the housing. With the goal.

The hot water supply device of the present invention
At least part of it is a water heater that is installed outdoors and heats and supplies hot water.
A heating unit for heating the hot water, an electrical component for controlling the heating section, and a housing for accommodating the heating section and the electrical component are provided.
The housing has a recess that is recessed toward the outside of the housing, and a cover portion that covers the recess between the recess and the electrical component.
The recess is provided in a portion of the housing located outside.
The recess is provided with a first communication hole that communicates the inside of the recess with the outside of the housing.
The cover portion is provided with a second communication hole that communicates the inside of the recess and the inside of the housing.
The first communication hole and the second communication hole are characterized in that they are provided at positions displaced from each other when viewed from the direction in which the recess and the cover portion overlap.

As described above, the hot water supply device of the present invention has a recess that is provided in the housing and is recessed toward the outside, and a cover portion that covers the recess between the recess and the electrical component. The recess is provided with a first communication hole that communicates the inside of the recess and the outside of the housing, and the cover portion has a second communication hole that communicates the inside of the recess and the inside of the housing. Is provided.

The recess is provided in a portion of the housing located outside. That is, the inside and the outside (outdoor) of the housing are communicated with each other through a communication passage configured by using the recess and the cover portion.

Here, in the hot water supply device of the present invention, the first communication hole and the second communication hole are provided at positions displaced from each other when viewed from the direction in which the recess and the cover portion overlap. As a result, even if water has entered the inside of the communication passage from the outside of the housing through the first communication hole, the water passes through the first communication hole and then the inside of the communication passage. Will collide with the cover member. As a result, it is prevented that the water infiltrates further into the housing through the second communication hole.

Therefore, according to the hot water supply device of the present invention, the cover member suppresses the infiltration of water into the inside of the housing, and the water causes the electrical components arranged inside the cover member to be more inside. It is possible to prevent it from getting wet.

Further, in the hot water supply device of the present invention,
The housing has an outer member and an inner member assembled so that at least a part thereof is located inside the outer member.
The outer member has a first flange portion that projects so as to overlap the outer surface side of the inner member.
The recess is provided in the first flange portion and is provided.
It is preferable that the cover portion is provided at a portion of the inner member that overlaps with the first flange portion.

Generally, the housing of a hot water supply device is configured by assembling a plurality of members. Further, it is generally practiced to provide a flange portion on the constituent member for the assembly. Therefore, if a concave portion is provided in the flange portion in this way, the flange portion is a portion that is relatively easy to process. Therefore, a continuous passage configured by using the concave portion and the cover portion as described above is easily provided. Can be realized.

Further, in the hot water supply device of the present invention,
The housing has an outer member and an inner member assembled so that at least a part thereof is located inside the outer member.
The inner member has a second flange portion that protrudes so as to overlap the inner surface side of the outer member.
The recess is provided in a portion of the outer member that overlaps the second flange portion.
The cover portion is preferably provided on the second flange portion.

Generally, the housing of a hot water supply device is configured by assembling a plurality of members. Further, it is generally practiced to provide a flange portion on the constituent member for the assembly. Therefore, if the flange portion is used as the cover portion in this way, it is not necessary to prepare a special member as the cover portion. Therefore, a continuous passage configured by using the recess and the cover portion as described above can be easily provided. It can be realized.

Further, in the hot water supply device of the present invention,
It is preferable that the recess and the cover portion are provided on the lower surface of the housing.

With this configuration, the communication passage configured by using the recess and the cover portion as described above is used as a drain hole for draining water or the like that has entered the inside of the housing to the outside. be able to. When the recess and the cover portion are provided on the side surface or the upper surface of the housing, the communication passage formed by them can be used as an air supply / exhaust port.

Further, in the hot water supply device of the present invention, when the recess and the cover portion are provided on the lower surface of the housing, the case where the recess and the cover portion are provided on the lower surface of the housing.
The cover portion is preferably located at a position lower than the region other than the region where the cover portion is formed.

With such a configuration, water tends to collect in the formation region of the cover portion (that is, the passage formed by the recess which is the drain hole and the cover portion). As a result, water can be efficiently discharged from the housing.

Further, in the hot water supply device of the present invention,
The recess has a horizontally long shape.
The first communication hole is provided in the central portion of the bottom of the recess in the longitudinal direction.
It is preferable that the second communication hole is provided at a position where the recess and the cover portion overlap with each other when viewed from the direction in which the recess and the cover portion overlap.

With this configuration, the formation position of the first communication hole and the formation position of the second communication hole can be sufficiently shifted by performing relatively simple processing.

The side view which conceptually explains the installation state and the structure of the hot water supply device which concerns on embodiment. The side view which shows the state of the cross section of the main part of the hot water supply device of FIG. 1 in an enlarged manner. FIG. 3 is an enlarged perspective view showing the internal structure of a main part of the hot water supply device of FIG. The perspective view which shows the main part of the side plate of the hot water supply device of FIG. 1 in an enlarged manner. FIG. 3 is an enlarged perspective view showing a main part of the bottom plate of the hot water supply device of FIG. The plan view which shows the internal structure of the main part of FIG. 1 enlarged. The side view which shows the state of the cross section of the main part of the hot water supply device which concerns on a modification, is enlarged.

Hereinafter, the hot water supply device 1 according to the embodiment will be described with reference to the drawings. The hot water supply device 1 of the present embodiment has a hot water supply function of heating hot water for hot water supply introduced from a water supply source such as tap water and supplying it to a curan or the like installed in the bathroom 2.

First, a schematic configuration of the hot water supply device 1 will be described with reference to FIG.

As shown in FIG. 1, the hot water supply device 1 is for supplying heated hot water to the bathtub 20, the curan, and the like of the bathroom 2. The bathroom wall 21 of the bathroom 2 is provided with a wall hole 21a that communicates the inside and the outside of the bathroom 2, and the hot water supply device 1 is installed so as to be fitted into the wall hole 21a.

The hot water supply device of the present invention is not limited to such a configuration, and at least a part of the hot water supply device may be installed outdoors to heat and supply hot water.

Therefore, for example, heated hot water may be supplied to a kitchen or the like. Further, for example, in addition to the hot water supply function, a reheating function for circulating and heating the hot water in the bathtub, which is the hot water stored in the bathtub, may be provided. Further, for example, the entire device may be installed outside the bathroom.

The hot water supply device 1 includes a rectangular case 10 (housing) fitted into the wall hole 21a. Inside the case 10, a combustion housing 11, a combustion fan 12, and an electrical component 13 are housed.

In the hot water supply device 1 configured in this way, first, the combustion air taken in from the outside of the case 10 is sent to the combustion housing 11 by the rotation of the combustion fan 12. Further, a burner 11a is installed inside the combustion casing 11. Fuel gas is supplied to the burner 11a via the fuel supply pipe 14, and combustion is performed by a mixed gas of the fuel gas and combustion air.

Next, the combustion exhaust gas generated by the combustion of the burner 11a is pushed out by the combustion air sent into the combustion housing 11 by the combustion fan 12, and is exhausted to the outside of the case 10 through the exhaust port portion 11b of the combustion housing 11. Will be done.

The case 10 has a bottomed tubular shape having a bathroom-side opening 10c by assembling a plate-shaped second member 10b (outer member) to an opening on one side of the tubular first member 10a (inner member). It is configured as a member of. The bottom of the case 10 (that is, the second member 10b) is formed with an exhaust port side opening 10d into which the exhaust port portion 11b of the combustion casing 11 is fitted.

The end portion of the first member 10a of the case 10 on the bathroom side opening 10c side is fitted into the wall hole 21a of the bathroom 2. Further, the portion of the case 10 on the second member 10b side (bottom side) of the portion fitted in this way is installed so as to project to the outside of the bathroom 2.

A support plate 15 is provided on the inner peripheral side of the end portion of the bathroom side opening 10c of the first member 10a of the case 10, and a control board 16 is attached to the bathroom 2 side of the support plate 15. .. The bathroom side opening 10c and the control board 16 are covered with a front cover 17. A part of the control board 16 is exposed from the front cover 17, and can be operated by the user from the bathroom 2.

The combustion housing 11 has a burner 11a and a heat exchanger 11c (heating unit) arranged above the burner 11a and recovering the sensible heat of the combustion exhaust gas by the burner 11a.

The heat exchanger 11c has a large number of endothermic fins 11d and a heat exchange water channel 11e penetrating these endothermic fins 11d.

Hot water for hot water supply supplied from a water supply source (not shown) is guided to the heat exchange water channel 11e. The hot water supply water flowing through the heat exchange water channel 11e is heated by the sensible heat of the combustion exhaust gas absorbed through the endothermic fins 11d. The hot water for hot water heated in this way is guided to the curan or the like provided in the bathroom 2.

The electrical component 13 controls the drive of the burner 11a and the combustion fan 12. In FIG. 1, the electrical component 13 is shown on the side of the combustion housing 11 and the combustion fan 12, which is schematically shown. Therefore, in reality, a plurality of electrical components are dispersedly arranged at a plurality of locations inside the case 10.

Next, the configuration of the main part of the case 10 will be described in detail with reference to FIGS. 2 to 6.

As described above, in the case 10, the second member 10b that covers the opening on the end side is assembled to the end of the tubular first member 10a on the side opposite to the bathroom side opening 10c (see FIG. 1). It is composed of things.

As shown in FIGS. 2 to 4, the first member 10a has a tubular portion from the lower end edge of the tubular portion 10e and the opening on the side opposite to the bathroom side opening 10c of the tubular portion 10e. It has a plate-shaped inner flange portion 10f (cover portion, second flange portion) that protrudes toward the second member 10b side along the axial direction of 10e (left-right direction in FIG. 2).

As shown in FIGS. 2, 3 and 5, the second member 10b is formed from the flat plate portion 10g covering the opening on the side opposite to the bathroom side opening 10c of the first member 10a and the lower end edge of the flat plate portion 10g. It has an outer flange portion 10h (first flange portion) protruding toward the first member 10a along the axial direction of the tubular portion 10e.

When assembling the first member 10a and the second member 10b, the inner flange portion 10f is arranged so as to overlap the inner surface side of the outer flange portion 10h, and then the first member 10a and the second member 10b are formed by spot welding or the like. To fix.

As shown in FIGS. 2 and 5, the outer flange portion 10h is formed with a recess 10i recessed toward the outside of the case 10 on the inner surface side thereof and overlapping with the inner flange portion 10f. .. The recess 10i is provided on the inner surface of a portion of the case 10 located outside.

As shown in FIG. 6, the shape of the recess 10i is a horizontally long shape, the central portion thereof is a straight line shape, and both end portions are semicircular shapes. A first communication hole 10j is provided at the bottom of the central portion of the recess 10i in the longitudinal direction. The first communication hole 10j communicates the inside of the recess 10i with the outside of the case 10.

As shown in FIGS. 2 and 4, the portion of the inner flange portion 10f that overlaps the outer flange portion 10h between the recess 10i and the electrical component 13 is a cover portion that covers the recess 10i.

As shown in FIG. 6, the inner flange portion 10f has a position where the outer flange portion 10h (that is, the concave portion 10i) and the inner flange portion 10f overlap each other of the concave portions 10i of the outer flange portion 10h when viewed from the overlapping direction. A second communication hole 10k is provided in each of the above. The second communication hole 10k communicates the inside of the recess 10i with the inside of the case 10.

In the case 10 configured in this way, the outside and the inside of the case 10 communicate with each other via a communication passage configured by using the recess 10i and the inner flange portion 10f. Since the communication passage is provided on the lower surface of the case 10, it is a drain hole for draining water or the like that has entered the inside of the case 10 to the outside.

As shown in FIG. 2, the second communication hole 10k, which is the inner opening of the case 10 of the drain hole, is provided in the inner flange portion 10f. The inner flange portion 10f is formed to have a lower height than the lower surface of the tubular portion 10e. That is, the cover portion that is a part of the inner flange portion 10f is located at a position lower than the region other than the region where the cover portion is formed.

Therefore, water tends to collect in the inner flange portion 10f (and by extension, the second communication hole 10k which is the opening of the drain hole). As a result, water can be efficiently discharged from the case 10.

By the way, this drain hole communicates the inside and the outside of the case 10. Therefore, when water is splashed on the case 10 for cleaning or the case 10 is exposed to rainwater, the case 10 is exposed to rainwater through the opening outside the drain hole (that is, the first communication hole 10j). Then, water may enter the inside of the case 10, and the water may wet the electrical component 13.

However, in this case 10, the first communication hole 10j, which is the opening of the drain hole, and the second communication hole 10k are in the direction in which the outer flange portion 10h (that is, the recess 10i) and the inner flange portion 10f overlap. When viewed from the above, the recesses 10i are provided at positions offset from each other in the longitudinal direction.

As a result, even if water has entered the inside of the communication passage from the outside of the case 10 through the first communication hole 10j, the water passes through the first communication hole 10j and then the communication passage. Will collide with the inner flange portion 10f inside. As a result, it is suppressed that the water infiltrates further into the case 10 through the second communication hole 10k of the inner flange portion 10f.

Therefore, according to the hot water supply device 1, the inner flange portion 10f prevents water from entering the inside of the housing, and the water is arranged inside the inner flange portion 10f. It is possible to prevent the electrical component 13 from getting wet.

Although the illustrated embodiment has been described above, the present invention is not limited to such an embodiment.

For example, in the above embodiment, as shown in FIGS. 2, 3 and 6, the case 10 which is a housing is configured by assembling the two members of the first member 10a and the second member 10b. .. However, the housing of the present invention is not limited to such a configuration, and may be any one that can accommodate a heating unit and electrical components inside. Therefore, the housing may be composed of one member or three or more members.

Further, in the above embodiment, as shown in FIGS. 2 to 6, an inner flange portion 10f is provided on the first member 10a, and a part of the inner flange portion 10f is used as a cover portion. Further, the second member 10b is provided with an outer flange portion 10h, and a recess 10i is formed in the outer flange portion 10h.

This is because it is common practice to provide a flange portion on the constituent members of the housing constructed by assembling, and since the flange portion is a portion that is relatively easy to process, a concave portion is easily formed. Because it can be done. Further, if the flange portion is used as the cover portion, it is not necessary to prepare a special member as the cover portion.

However, the cover portion and the recess of the present invention are not limited to such a configuration, and the recess may be provided in a portion located outside the housing, and the cover portion is the recess and electrical components. It suffices as long as it covers the recess between the and.

Therefore, for example, in the case 10 of the above embodiment, a concave portion may be provided on the wall surface of the tubular portion 10e without providing the flange portion, and a separate cover portion may be arranged so as to cover the concave portion. Further, only one of the concave portion and the cover portion may be provided on the flange portion. Further, the cover portion and the recess may be provided in the same member.

Further, in the above embodiment, as shown in FIG. 6, the shape of the recess 10i is a horizontally long shape. However, the recess of the present invention is not limited to such a configuration, and may be recessed toward the outside of the housing. Therefore, the shape may be changed as appropriate.

Further, in the above embodiment, as shown in FIG. 6, one first communication hole 10j is provided in the central portion in the longitudinal direction of the recess 10i, and the second communication hole 10k is provided in the recess of the inner flange portion 10f which is a cover portion. It is provided at each of the positions corresponding to both ends of the 10i. This is because the formation position of the first communication hole 10j and the formation position of the second communication hole 10k are sufficiently shifted by relatively simple processing.

However, the first communication hole and the second communication hole of the present invention are not limited to such a configuration, as long as they are provided at positions deviated from each other when viewed from the direction in which the recess and the cover portion overlap. good. Therefore, the first communication hole may not be formed in the central portion of the recess, and two or more may be formed. Further, the second communication holes may not be formed at positions corresponding to both ends of the recesses, but only one may be formed, or three or more may be formed.

Further, in the above embodiment, the recess 10i and the inner flange portion 10f which is a cover portion covering the recess 10i are provided on the lower surface side of the case 10 which is a housing, and the communication passage formed by them is used as a drain hole. .. However, the present invention is not limited to such a configuration, and the recess and the cover portion may be provided on the side surface or the upper surface of the housing. When configured in this way, the communication passages formed by them can be used as air supply / exhaust ports.

Further, in the above embodiment, the inner flange portion 10f serving as a cover portion is provided on the first member 10a which is the inner member, and the recess 10i is formed in the second member 10b which is the outer member. However, the present invention is not limited to such a configuration.

Therefore, for example, as in the modified example shown in FIG. 7, in the hot water supply device 1 in the above embodiment, the first member 10a is used as an outer member, and the recess 10i is formed at the edge of the opening on the outdoor side of the first member 10a. The second member 10b is used as an inner member, and the flange portion extended from the lower end thereof to the first member 10a side and inserted into the first member 10a is used as a cover portion to cover the recess 10i. You may.

1 ... hot water supply device, 2 ... bathroom, 10 ... case (housing), 10a ... first member (inner member), 10b ... second member (outer member), 10c ... bathroom side opening, 10d ... exhaust port side opening Part, 10e ... Cylindrical part, 10f ... Inner flange part (cover part, second flange part), 10g ... Flat plate part, 10h ... Outer flange part (first flange part), 10i ... Recessed portion, 10j ... First communication hole 10, k ... 2nd communication hole, 11 ... combustion casing, 11a ... burner (heating part), 11b ... exhaust port part, 11c ... heat exchanger (heating part), 11d ... heat absorption fins, 11e ... heat exchange water channel, 12 ... Combustion fan, 13 ... electrical components, 14 ... supply pipe, 15 ... support plate, 16 ... control board, 17 ... front cover, 20 ... bathtub, 21 ... bathroom wall, 21a ... wall hole.

Claims (6)

At least part of it is a water heater that is installed outdoors and heats and supplies hot water.
A heating unit for heating the hot water, an electrical component for controlling the heating section, and a housing for accommodating the heating section and the electrical component are provided.
The housing has a recess that is recessed toward the outside of the housing, and a cover portion that covers the recess between the recess and the electrical component.
The recess is provided in a portion of the housing located outside.
The recess is provided with a first communication hole that communicates the inside of the recess with the outside of the housing.
The cover portion is provided with a second communication hole that communicates the inside of the recess and the inside of the housing.
The hot water supply device is characterized in that the first communication hole and the second communication hole are provided at positions displaced from each other when viewed from the direction in which the recess and the cover portion overlap. In the hot water supply device according to claim 1,
The housing has an outer member and an inner member assembled so that at least a part thereof is located inside the outer member.
The outer member has a first flange portion that projects so as to overlap the outer surface side of the inner member.
The recess is provided in the first flange portion, and the recess is provided in the first flange portion.
The hot water supply device is characterized in that the cover portion is provided at a portion of the inner member that overlaps with the first flange portion. In the hot water supply device according to claim 1 or 2.
The housing has an outer member and an inner member assembled so that at least a part thereof is located inside the outer member.
The inner member has a second flange portion that protrudes so as to overlap the inner surface side of the outer member.
The recess is provided in a portion of the outer member that overlaps the second flange portion.
The cover portion is a hot water supply device provided on the second flange portion. The hot water supply device according to any one of claims 1 to 3.
A hot water supply device characterized in that the recess and the cover portion are provided on the lower surface of the housing. In the hot water supply device according to claim 4,
The hot water supply device is characterized in that the cover portion is located at a position lower than a region other than the region where the cover portion is formed. The hot water supply device according to any one of claims 1 to 5.
The recess has a horizontally long shape.
The first communication hole is provided in the central portion of the bottom of the recess in the longitudinal direction.
The second communication hole is a hot water supply device provided at a position where the recess and the cover portion overlap each other when viewed from the direction in which the recess and the cover portion overlap.

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