JP2000097502A - Water heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To promptly discharge water outside a casing at the time of fully removing water and draining leaked water, and prevent an outflow of water to the inside of a house even when water is collected because of an excessive amount of flow, in a water heating device for a cold district. SOLUTION: In a water heating device for a cold district, in which a water heater B and its piping portion C are covered with a heat insulating double casing A, a drain hole 14 having a drainage guard 15 is provided at a base portion of a cold protecting chamber 4 for piping of the heat insulating double casing A, and further, a gap 22 made between a wall-passing piping sleeve 20 and a through-hole 21 in a wall D is tightly closed by an adapter 23 for sealing at the side of the cold protecting chamber for piping.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an outdoor type hot water supply apparatus in a cold region such as Hokkaido, which quickly and reliably discharges drainage at the time of drainage and leakage of water at the time of freezing breakage of an equipment water passage portion to the outside of a casing. The present invention relates to a hot water supply apparatus which is prevented from being discharged to the indoor side and flowing out.

[0002]

2. Description of the Related Art Conventionally, in an outdoor type hot water supply apparatus in a cold region such as Hokkaido, for example, as shown in FIG. A front cover is provided with a drain guard 15 'for covering the bottom with a double casing A' to protect against the cold, and for guiding drainage for drainage and drainage for freezing breakage in the equipment water passage part to the front at the bottom of the pipe cold protection room 4 '. It is provided to be inclined to the side. Further, a water drainage plug 16 'and a pressure relief valve 17' are separately provided in the pipe cold room 4 ', and a gap 22' between the wall through pipe sleeve 20 'and the through hole 21' in the wall D '. Has a hole filling caulking 23 '
You are.

[0003]

However, the above conventional technique has the following problems.
1. In the case of severe cold, a long absence, or when the building is not in the house, it is necessary to drain the water in the equipment water passage section. In this draining operation, the drainage flows to the front through the drainage guard 15 '.
Must always be open. 2. If the water passage of the equipment is accidentally frozen and damaged, the pipe cold protection room 4 'of the insulated double casing has a sealed structure, so that water leakage will accumulate in the pipe cold protection chamber 4', causing water leakage with an excessive flow rate. At times, there is a possibility that water may flow out from the gap 22 'between the through-wall piping sleeve 20' and the through-hole 21 'of the wall D' to the indoor side. 3.
The pressure relief valve 17 ′ provided separately from the water drainage plug 16 ′ has a blow-out port 18 ′ oriented in the horizontal direction, so that when the pressure relief valve 17 ′ operates and water is blown out,
Water blows out and scatters in the horizontal direction, and when high-temperature water is blown out by, for example, empty heating, the heat insulating material is dissolved. Then, this is collected in the pipe cold room 4 'and the wall penetration pipe sleeve 20' and wall D '
There was also a risk that water would flow out from the gap 22 'with the through hole 21' to the indoor side.

[0004] The hot water supply apparatus of the present invention solves the above-mentioned problems,
Drainage during drainage and leakage due to freezing damage to the water passage of the equipment are released as soon as possible to the outside of the casing, and even if high-temperature water gushes from the pressure relief valve, the heat insulating material is not melted. It is an object of the present invention to provide a hot water supply apparatus which can reliably prevent the water from flowing out to the indoor side even if water accumulates in the pipe cold room with a proper flow rate, and solve the above-mentioned conventional problems.

[0005]

According to a first aspect of the present invention, there is provided a water heater in which a water heater and a piping portion thereof are covered with an insulated double casing to prevent the water from being cooled. The gist of the present invention is to provide a drain hole for drainage at the bottom of the pipe cold room, which drains water when draining water and leaks water when the equipment water passage breaks due to freezing damage.

A second aspect of the present invention to solve the above-mentioned problem is that the hot water supply apparatus according to the first aspect further includes a drain guard for guiding drain water to the drain hole.

According to a third aspect of the present invention, there is provided a water heater in which a water heater and a piping portion thereof are covered with an insulated double casing to prevent cold. The gist of the present invention is that a pressure relief valve is incorporated in the drain plug to be drained, and an outlet of the pressure relief valve is provided downward so as to face the drain hole.

According to a fourth aspect of the present invention, there is provided a hot water supply apparatus in which a water heater and a piping portion thereof are covered with an insulated double casing for cold protection. The gist is that a gap between a wall-through pipe sleeve provided through the inside and a through-hole in the wall is sealed with a sealing adapter on the pipe cold room side.

In the hot water supply apparatus according to the first aspect of the present invention having the above structure, a drain hole is provided in the bottom of the cold insulation room for the pipe of the heat insulating double casing, so that drainage at the time of draining water or equipment water flow. Drainage of water leaks from freezing breakage of parts is discharged downward through drain holes. As a result, at the time of drainage, drainage can be continued even if the front door is closed after opening the drainage stopper, and water leakage at the time of freezing breakage of the equipment water passage section is also discharged from the drainage hole and accumulated in the pipe cold room. Never.

In the hot water supply apparatus according to the second aspect of the present invention having the above structure, a drainage guard for guiding drainage is provided in the drainage hole. The drainage is guided to a drainage guard and collected in a drainage hole and discharged. As a result, all of the drainage is discharged from the drainage hole to the outside of the casing without leaving water at the bottom of the pipe cold room.

In the hot water supply apparatus according to the third aspect of the present invention having the above structure, since the outlet of the pressure relief valve built in the water drainage plug is directed downward to the drain hole, the hot water is blown out from the pressure relief valve. Water flows to the drain holes and is discharged out of the casing. As a result, drainage during operation of the pressure relief valve is reliably discharged to the outside of the casing without remaining at the bottom of the piping cold room. For example, even when high-temperature water is blown out due to, for example, empty heating, piping having relatively low heat resistance is used. It does not melt the insulation in the cold room.

In the hot water supply apparatus according to the fourth aspect of the present invention having the above-described structure, the gap between the through-hole pipe sleeve and the through-hole in the wall is sealed by the sealing adapter on the side of the pipe cold room. Even if water accumulates in the pipe cold room due to the occurrence of water leakage at the flow rate, water does not flow out to the indoor side from the gap between the wall-through pipe sleeve and the wall through-hole. As a result, intrusion of water into the indoor side at the time of drainage or leakage is completely prevented.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION In order to further clarify the configuration and operation of the present invention described above, an example of a preferred embodiment of a hot water supply apparatus of the present invention will be described below with reference to the drawings.

The illustrated hot water supply apparatus is an example in which the present invention is applied to a water heater with additional heating of a gas hot water bath system,
In FIG. 1 to FIG. 9, A is an insulated double casing, which is composed of a metal plate 1 and a heat insulating material 2, and is provided with an upper water heater cold protection room 3 covering the water heater B to prevent cold and a piping portion C of the water heater B. A lower pipe cold room 4 that covers and protects against cold is continuously formed integrally, and the front surfaces of the water heater cold room 3 and the pipe cold room 4 are provided with openings 5 and 6, and a heat insulating material is provided on the inner surface of the metal plate 1. 2 is formed in a box-shaped insulated double casing in which the whole is unitized. The insulated double casing A covers the water heater B and its piping portion C, and blocks the outside air to provide heat insulation and cold protection. Have been.

The front cover 5 of the water heater B is provided in the front opening 5 of the water heater cold protection room 3 of the heat insulating double casing A for the above-mentioned cold protection.
The front opening 5 is hermetically closed with a front cover 7, and a single-opening front door 8 is provided in the front opening 6 of the piping cold protection room 4. The front opening 6 is opened and closed by the front door 8. I can do it. At the center of the upper end of the rear surface of the insulated double casing A, there is provided a mounting plate 9 for attaching and installing the insulated double casing A to the installation wall D.
Mounting seats 10 and 11 for mounting the water heater B at the center of the front upper end and on both sides at the bottom. In addition, water heater B
An exhaust port 12 and an air supply port 13 provided above and below the front cover 7 supply and exhaust air necessary for combustion of the water heater main body E and the reheating unit F installed in the water heater B. The water heater main body E and the piping portion C of the reheating unit F are housed in the cold insulation room 4 of the piping of the heat insulating double casing A at the same time when the water heater B is installed.

A drain hole 14 is provided in the bottom of the cold insulation room 4 of the pipe of the heat-insulated double casing A. The drain hole 14 is integrally provided with a funnel-shaped drain guard 15 for guiding drain water.
All the water flowing down to the bottom of the pipe cold room 4 is guided to the drain hole 14 via the drain guard 15, and the drain cylinder 14 a is fitted into a support hole 15 a formed in the center of the drain guard 15. It is fixed (see FIGS. 3, 4 and 5).

Reference numerals 16 and 17 denote water taps, 16 denotes a water tap on the water heater main body E side, and 17 denotes a water drain tap on the reheating unit F side, which is located just above and near the drain hole 14. The water drainage plugs 16 and 17 have built-in pressure relief valves,
The outlets 18 and 19 are provided in the downward direction directed to the drain hole 14 so that the drain direction at the time of draining and the direction of the water outlet when the pressure relief valve is operated flow down toward the drain hole 14. (See FIG. 3).

Reference numeral 20 denotes a through-wall pipe sleeve provided through the pipe cold protection room 4 and the indoor side of the heat-insulating double casing A, and a gap between the through-wall pipe sleeve 20 and the through hole 21 formed in the wall D. The pipe 22 is hermetically sealed with a sealing adapter 23 on the side of the cold room 4 to prevent water from flowing out indoors. The sealing adapter 23 includes a support member 23a for supporting the distal end of the through-wall piping sleeve 20 via a sealing material 24 and a mounting seat 23b. The distal end of the through-wall piping sleeve 20 is attached to the supporting member 23a via a sealing material. The mounting seat 23b is fixed to the wall D with a set screw 26 via a ring-shaped sealing material 25, so that the
Are sealed (see FIGS. 8 and 9).
Note that the support member 27 is provided on the indoor side of the through-wall piping sleeve 20.
Supported by.

In FIG. 1, reference numeral 28 denotes a bathtub, V1 denotes a hot water supply faucet, V2 denotes a water stop cock, V3 denotes an air supply valve, V4 denotes a main water drainage plug, 29 denotes a water supply main pipe, and 30 denotes a freezing prevention heater.

Although an example of the embodiment of the hot water supply apparatus of the present invention has been described above, the present invention is not limited to such an embodiment, and may be implemented in various forms without departing from the gist of the present invention. Of course you can. For example, in the case of a high-temperature water supply type hot water supply device without a reheating device, one water tap with a built-in pressure relief valve is located just above the drain hole.

[0021]

The hot water supply apparatus of the present invention is embodied in the form described above, and has the following effects.

According to the hot water supply apparatus according to the first aspect of the present invention, since a drain hole is provided at the bottom of the cold-insulation room for the piping of the heat-insulating double casing for cold protection, the drain for draining water and the water passage for equipment are provided. Drainage of water leakage due to freezing damage is immediately released from the drainage hole, does not accumulate in the cold room, and drainage continues even if the front door is closed after the drainage operation.

According to the hot water supply apparatus of the second aspect of the present invention, a drain guard for guiding drain water is provided in the drain hole.
Drainage during drainage and leakage of water due to freezing damage to the equipment water passage are guided to a drain guard, collected in a drain hole, and all of the water is discharged outside the casing.

According to the third aspect of the present invention, since the outlet of the pressure relief valve built in the water tap is directed downward to the drain hole, the water blown out from the pressure relief valve is The liquid is reliably guided to the drain hole and discharged out of the casing. Then, even if high-temperature water is blown out by, for example, empty heating, the heat insulating material is not melted. In addition, there is a problem of electric leakage due to wetting the connector of the anti-freezing heater in the piping cold room, but there is no concern about such a problem by downward facing.

According to the hot water supply apparatus according to the fourth aspect of the present invention, the gap between the through-hole pipe sleeve and the through-hole in the wall is sealed by the sealing adapter on the side of the pipe cold room.
Even if water accumulates in the pipe cold room due to occurrence of an excessive flow rate of water leakage, water does not flow out from the gap between the through-hole pipe sleeve and the through-hole in the wall to the indoor side.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an example of an installation state of a hot water supply device of the present invention.

FIG. 2 is an enlarged sectional view of a main part thereof.

FIG. 3 is a partially cutaway front view of only the hot water supply device.

FIG. 4 is a sectional side view of the same part.

FIG. 5 is a perspective view of a drain guard.

FIG. 6 is a sectional view taken along line XX of FIG. 5;

FIG. 7 is a sectional view taken along line YY of FIG. 5; .

FIG. 8 is a partial cross-sectional view of a portion of the through-wall piping sleeve.

FIG. 9 is an exploded perspective view of the components.

FIG. 10 is a sectional view of a conventional example in an installed state.

[Explanation of symbols]

 A: Insulated double casing B: Hot water supply C: Piping part 4: Pipe cold protection room 14: Drain hole 15: Drain guard 16, 17: Drain plug 18, 19: Outlet 20: Wall through piping sleeve D: Wall 21 ... Through hole 22 ... gap 23 ... adapter for sealing

Claims (4)

[Claims] 1. A water heater in which a water heater and a piping portion thereof are covered with an insulated double casing to prevent cold, wherein drainage at the time of draining water and freezing of a device water passage portion are provided on a bottom surface of the piping and cold protection room of the insulated double casing. A hot-water supply device comprising a drain hole for draining water leakage at the time of breakage. 2. The hot water supply device according to claim 1, further comprising a drain guard for guiding drain water to the drain hole. 3. A water heater in which a water heater and a piping portion thereof are covered with an insulated double casing to prevent cold, wherein a pressure relief valve is incorporated in a water drainage plug provided in a pipe cold protection room of the insulated double casing, and the pressure relief valve is provided. A hot-water supply device comprising a valve outlet provided downwardly facing the drain hole. 4. A hot-water supply device in which a water heater and a piping portion thereof are covered with an insulated double casing to prevent cold, wherein a wall-penetrating piping sleeve and a wall are provided so as to penetrate the cold-insulated room and the indoor side of the insulated double casing. A hot water supply device characterized in that a gap between the pipe and the through hole is sealed with a sealing adapter on the side of the pipe cold room.