JP2004293839A - Electric water heater - Google Patents

Electric water heater Download PDF

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Publication number
JP2004293839A
JP2004293839A JP2003084273A JP2003084273A JP2004293839A JP 2004293839 A JP2004293839 A JP 2004293839A JP 2003084273 A JP2003084273 A JP 2003084273A JP 2003084273 A JP2003084273 A JP 2003084273A JP 2004293839 A JP2004293839 A JP 2004293839A
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JP
Japan
Prior art keywords
hot water
storage tank
water storage
heater
water heater
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP2003084273A
Other languages
Japanese (ja)
Inventor
Shinji Kuramoto
新治 蔵本
Hidekatsu Fujita
英克 藤田
Takemi Kinoshita
武美 木下
Tsuyoshi Yokomizo
剛志 横溝
Kazuo Matsuda
和雄 松田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Appliances Inc
Original Assignee
Hitachi Air Conditioning Systems Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Air Conditioning Systems Co Ltd filed Critical Hitachi Air Conditioning Systems Co Ltd
Priority to JP2003084273A priority Critical patent/JP2004293839A/en
Publication of JP2004293839A publication Critical patent/JP2004293839A/en
Withdrawn legal-status Critical Current

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  • Heat-Pump Type And Storage Water Heaters (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an electric water heater capable of installing a hot water storage tank in compact without making a dead space at a corner. <P>SOLUTION: In this electric water heater comprising the hot water storage tank 1, a water supply pipe 2 mounted in the hot water supply tank 1, a hot water supply pipe 3 mounted on an upper part of the hot water storage tank, and heaters 4, 5 mounted in the hot water storage tank 1, the hot water storage tank 1 has the rectangular parallelepiped shape, and the circumference of the hot water storage tank 1 is surrounded by a plate-shaped reinforcement material having a heat insulating material 6 as a core material, like a frame. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、電気温水器に関し、特に、隅角にデッドスペースを作ることなく、貯湯タンクをコンパクトに設置することができる電気温水器に関するものである。
【0002】
【従来の技術】
従来、深夜電力を用いた電気温水器では、水道管から供給された水道水を電気温水器の貯湯タンク内にて加熱するとともに、この加熱した温水を、直接或いは別の水道管からの水道水と混合することにより設定温度に調節し、この温度調節した温水を配管を介して浴室の給湯口や蛇口に供給するように構成されている。
【0003】
【発明が解決しようとする課題】
ところで、上記従来の電気温水器では、通常は数百リットルの貯湯タンクを必要とするため、貯湯タンクは、水圧に強い円筒形が採用されている。
しかしながら、この円筒形の貯湯タンクは、その形状から設置場所の隅角にデッドスペースを作り、結果的に広いスペースを占拠するという問題を有している。
【0004】
本発明は、上記従来の電気温水器が有する問題点に鑑み、隅角にデッドスペースを作ることなく、貯湯タンクをコンパクトに設置することができる電気温水器を提供することを目的とする。
【0005】
【課題を解決するための手段】
上記目的を達成するため、本発明の電気温水器は、貯湯タンクと、該貯湯タンクの下部に設けられた給水管と、貯湯タンクの上部に設けられた給湯管と、貯湯タンク内の下部に設けられた下部ヒータと、貯湯タンク内の上部に設けられた上部ヒータとを備えた電気温水器において、前記貯湯タンクを直方体状に形成するとともに、該貯湯タンクの周囲を、断熱材を芯材とする板状の補強材により枠状に取り囲んだことを特徴とする。
【0006】
この電気温水器は、貯湯タンクを直方体状に形成するとともに、該貯湯タンクの周囲を、断熱材を芯材とする板状の補強材により枠状に取り囲むことから、貯湯タンクを水圧に耐える強度を保持しながら設置性に優れた直方体形状に形成することができ、これにより、隅角にデッドスペースを作ることなく、貯湯タンクをコンパクトに設置することができる。
【0007】
この場合において、前記補強材を、金属板と合成樹脂発泡体とを一体成形して形成することができ、特に、補強材の金属板が外側に、合成樹脂発泡体が内側になるように配設することができる。
【0008】
これにより、補強材を強くコンパクトに形成することができ、補強材の金属板が外側に、合成樹脂発泡体が内側になるように配設することにより、断熱性能を一層向上することができる。
【0009】
また、貯湯タンクの水面上に空間部を設け、該空間部と外部を蒸気排出管により連通させることができる。
【0010】
これにより、貯湯タンクを大気開放型として圧力負荷を下げ、貯湯タンクが必要とされる耐圧性能を小さくすることができるとともに、従来は圧力負荷時に膨張水として排出していた温水の排出量を少なくし、低コスト化を図ることができる。
【0011】
【発明の実施の形態】
以下、本発明の電気温水器の実施の形態を図面に基づいて説明する。
【0012】
図1〜図3に、本発明の電気温水器の1実施例を示す。
この電気温水器は、所要の容量を有するステンレススチール製の貯湯タンク1と、該貯湯タンク1の下部に設けられた給水管2と、貯湯タンク1の上部に設けられた給湯管3と、貯湯タンク1内の下部に設けられた下部ヒータ4と、貯湯タンク1内の上部に設けられた上部ヒータ5とを備えている。
そして、この電気温水器は、図2に示すように、貯湯タンク1を直方体状に形成するとともに、該貯湯タンク1の側板1aの周囲を、断熱材6を芯材とする板状の補強材7により枠状に取り囲んでいる。
なお、この電気温水器は、貯湯タンク上部の温水をポンプ8によって給湯側に圧送するとともに、追い焚き配管9と熱交換する熱交換器10を備え、風呂の追い焚きを可能としている。
【0013】
補強材7は、例えば、図3に示すように、鉄等の金属板71と断熱材6としての合成樹脂発泡体72とを一体成形することにより、補強材7を強くコンパクトに形成している。金属板71は、縁部を除いて1面をほぼ解放した箱状に形成されており、その内部に合成樹脂発泡体72が充填されている。
合成樹脂発泡体72は、硬質の発泡ポリスチレン等により強度(剛性)を有するように形成されており、内部に鉄等の金属製のアングル材73が筋材として幅方向又は縦方向に埋設されている。アングル材73は外側の金属板71に溶接されている。
そして、本実施例では、図2に示すように、4枚の補強材7をボルト等により枠状に接合することにより、貯湯タンク1を四周から補強している。
【0014】
また、この電気温水器では、図4に示すように、貯湯タンク1の水面上に空間部11が設けられており、該空間部11と外部とが蒸気排出管12により連通されている。
貯湯タンク1の水面上の空間は、所定高さまで上がった水位を水位センサー13等で検知し、給水を止めることにより確保することができる。
これにより、貯湯タンク1を大気開放型として圧力負荷を下げ、貯湯タンク1が必要とされる耐圧性能を小さくすることができるとともに、従来は圧力負荷時に膨張水として排出していた温水の排出量を少なくし、低コスト化を図ることができる。
なお、蒸気排出管12を図4に示す変形実施例のように、トラップ状に形成することにより、蒸気排出管12からの塵や虫等の侵入を防止することができる。
【0015】
かくして、本実施例の電気温水器は、貯湯タンク1を直方体状に形成するとともに、該貯湯タンク1の周囲を、断熱材6を芯材とする板状の補強材7により枠状に取り囲むことから、貯湯タンク1を水圧に耐える強度を保持しながら設置性に優れた直方体形状に形成することができ、これにより、隅角にデッドスペースを作ることなく、貯湯タンク1をコンパクトに設置することができる。
【0016】
以上、本発明の電気温水器について、その実施例に基づいて説明したが、本発明は上記実施例に記載した構成に限定されるものではなく、その趣旨を逸脱しない範囲において適宜その構成を変更することができる。
【0017】
【発明の効果】
本発明の電気温水器によれば、貯湯タンクを直方体状に形成するとともに、該貯湯タンクの周囲を、断熱材を芯材とする板状の補強材により枠状に取り囲むことから、貯湯タンクを水圧に耐える強度を保持しながら設置性に優れた直方体形状に形成することができ、これにより、隅角にデッドスペースを作ることなく、貯湯タンクをコンパクトに設置することができる。
【0018】
また、前記補強材を、金属板と合成樹脂発泡体とを一体成形して形成することにより、補強材を強くコンパクトに形成することができ、特に、補強材の金属板が外側に、合成樹脂発泡体が内側になるように配設することにより、断熱性能を一層向上することができる。
【0019】
また、貯湯タンクの水面上に空間部を設け、該空間部と外部を蒸気排出管により連通させることにより、貯湯タンクを大気開放型として圧力負荷を下げ、貯湯タンクが必要とされる耐圧性能を小さくすることができるとともに、従来は圧力負荷時に膨張水として排出していた温水の排出量を少なくし、低コスト化を図ることができる。
【図面の簡単な説明】
【図1】本発明の電気温水器の1実施例を示す回路図である。
【図2】同実施例の貯湯タンクを示し、(a)は断面平面図、(b)は断面正面図、(c)は断面側面図である。
【図3】同実施例の補強材を示し、(a)は斜視透視図、(b)は貯湯タンクに取り付けた状態を示す断面図である。
【図4】本発明の電気温水器の変形実施例を示す説明図である。
【符号の説明】
1 貯湯タンク
2 給水管
3 給湯管
4 下部ヒータ
5 上部ヒータ
6 断熱材
7 補強材
71 金属板
72 合成樹脂発泡体
73 アングル材
8 ポンプ
9 追い焚き配管
10 熱交換器
11 空間部
12 蒸気排出管
13 水位センサー
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electric water heater, and more particularly to an electric water heater that can install a hot water storage tank compactly without creating a dead space at a corner.
[0002]
[Prior art]
Conventionally, in an electric water heater using midnight power, tap water supplied from a water pipe is heated in a hot water storage tank of the electric water heater, and the heated hot water is directly or tap water from another water pipe. The temperature is adjusted to a set temperature by mixing with water, and this temperature-adjusted hot water is supplied to a hot water supply port or a faucet of a bathroom via a pipe.
[0003]
[Problems to be solved by the invention]
By the way, since the above-mentioned conventional electric water heater usually requires a hot water storage tank of several hundred liters, the hot water storage tank adopts a cylindrical shape which is strong against water pressure.
However, this cylindrical hot water storage tank has a problem that a dead space is created at the corner of the installation location due to its shape, and as a result, a large space is occupied.
[0004]
The present invention has been made in view of the above-described problems of the conventional electric water heater, and has as its object to provide an electric water heater that can install a hot water storage tank compactly without creating a dead space at a corner.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the electric water heater of the present invention comprises a hot water storage tank, a water supply pipe provided at a lower part of the hot water storage tank, a hot water supply pipe provided at an upper part of the hot water storage tank, and a lower part within the hot water storage tank. In an electric water heater provided with a lower heater provided and an upper heater provided in an upper part of the hot water storage tank, the hot water storage tank is formed in a rectangular parallelepiped shape, and a periphery of the hot water storage tank is provided with a heat insulating material as a core material. It is characterized by being surrounded by a plate-like reinforcing material in a frame shape.
[0006]
In this electric water heater, the hot water storage tank is formed in a rectangular parallelepiped shape, and the hot water storage tank is surrounded by a plate-like reinforcing material having a heat insulating material as a core, so that the hot water storage tank can withstand water pressure. Can be formed in a rectangular parallelepiped shape excellent in installation property, thereby making it possible to install the hot water storage tank compactly without creating a dead space at a corner.
[0007]
In this case, the reinforcing material can be formed by integrally molding a metal plate and a synthetic resin foam. In particular, the reinforcing material is arranged so that the metal plate of the reinforcing material is on the outside and the synthetic resin foam is on the inside. Can be set up.
[0008]
Thereby, the reinforcing member can be formed strong and compact, and the heat insulating performance can be further improved by disposing the reinforcing metal plate on the outside and the synthetic resin foam on the inside.
[0009]
Further, a space can be provided on the water surface of the hot water storage tank, and the space can be communicated with the outside by a steam discharge pipe.
[0010]
This makes it possible to reduce the pressure load by making the hot water storage tank open to the atmosphere and reduce the pressure resistance required by the hot water storage tank, and to reduce the amount of hot water that was conventionally discharged as expansion water under pressure load. Thus, cost reduction can be achieved.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of an electric water heater of the present invention will be described with reference to the drawings.
[0012]
1 to 3 show an embodiment of the electric water heater according to the present invention.
The electric water heater includes a hot water storage tank 1 made of stainless steel having a required capacity, a water supply pipe 2 provided at a lower part of the hot water storage tank 1, a hot water supply pipe 3 provided at an upper part of the hot water storage tank 1, A lower heater 4 provided at a lower portion in the tank 1 and an upper heater 5 provided at an upper portion in the hot water storage tank 1 are provided.
In this electric water heater, as shown in FIG. 2, the hot water storage tank 1 is formed in a rectangular parallelepiped shape, and the periphery of the side plate 1a of the hot water storage tank 1 is a plate-like reinforcing material having a heat insulating material 6 as a core material. 7 surrounds the frame.
This electric water heater is provided with a heat exchanger 10 for pumping hot water above a hot water storage tank to a hot water supply side by a pump 8 and exchanging heat with a reheating pipe 9, thereby enabling reheating of a bath.
[0013]
For example, as shown in FIG. 3, the reinforcing member 7 is formed by integrally molding a metal plate 71 made of iron or the like and a synthetic resin foam 72 as the heat insulating material 6, thereby forming the reinforcing member 7 strongly and compactly. . The metal plate 71 is formed in a box shape having one surface substantially open except for an edge portion, and the inside thereof is filled with a synthetic resin foam 72.
The synthetic resin foam 72 is formed so as to have strength (rigidity) by hard foamed polystyrene or the like, and a metal angle member 73 such as iron is buried inside in a width direction or a vertical direction as a reinforcing material. I have. The angle member 73 is welded to the outer metal plate 71.
In this embodiment, as shown in FIG. 2, the hot water storage tank 1 is reinforced from four sides by joining four reinforcing members 7 in a frame shape with bolts or the like.
[0014]
Further, in this electric water heater, as shown in FIG. 4, a space 11 is provided on the water surface of the hot water storage tank 1, and the space 11 is communicated with the outside by a steam discharge pipe 12.
The space above the water surface of the hot water storage tank 1 can be secured by detecting the water level raised to a predetermined height by the water level sensor 13 or the like and stopping the water supply.
As a result, the pressure load can be reduced by making the hot water storage tank 1 open to the atmosphere and the pressure resistance required by the hot water storage tank 1 can be reduced, and the discharge amount of the warm water that has conventionally been discharged as expansion water under the pressure load And cost can be reduced.
By forming the steam discharge pipe 12 in a trap shape as in the modified embodiment shown in FIG. 4, it is possible to prevent dust and insects from entering the steam discharge pipe 12.
[0015]
Thus, in the electric water heater of the present embodiment, the hot water storage tank 1 is formed in a rectangular parallelepiped shape, and the periphery of the hot water storage tank 1 is surrounded by the plate-like reinforcing material 7 having the heat insulating material 6 as a core material. Therefore, the hot water storage tank 1 can be formed in a rectangular parallelepiped shape excellent in installability while maintaining the strength to withstand the water pressure, so that the hot water storage tank 1 can be compactly installed without creating a dead space at a corner. Can be.
[0016]
As described above, the electric water heater according to the present invention has been described based on the embodiment. However, the present invention is not limited to the configuration described in the above embodiment, and the configuration may be appropriately changed without departing from the gist thereof. can do.
[0017]
【The invention's effect】
According to the electric water heater of the present invention, the hot water storage tank is formed in a rectangular parallelepiped shape, and the periphery of the hot water storage tank is surrounded by a plate-like reinforcing material having a heat insulating material as a core material. It can be formed in a rectangular parallelepiped shape excellent in installation property while maintaining the strength to withstand water pressure, whereby the hot water storage tank can be installed compactly without creating a dead space at a corner.
[0018]
Further, by forming the reinforcing material by integrally molding a metal plate and a synthetic resin foam, the reinforcing material can be formed strongly and compactly. By arranging the foam so that it is on the inside, the heat insulation performance can be further improved.
[0019]
Also, by providing a space on the water surface of the hot water storage tank and communicating the space with the outside by a steam discharge pipe, the hot water storage tank is opened to the atmosphere to reduce the pressure load, and the pressure resistance required by the hot water storage tank is reduced. In addition to being able to reduce the size, it is possible to reduce the amount of hot water that has conventionally been discharged as expansion water at the time of pressure load, thereby achieving cost reduction.
[Brief description of the drawings]
FIG. 1 is a circuit diagram showing one embodiment of an electric water heater according to the present invention.
2A and 2B show a hot water storage tank according to the embodiment, wherein FIG. 2A is a cross-sectional plan view, FIG. 2B is a cross-sectional front view, and FIG. 2C is a cross-sectional side view.
3A and 3B show a reinforcing member of the embodiment, wherein FIG. 3A is a perspective perspective view, and FIG. 3B is a cross-sectional view showing a state where the reinforcing member is attached to a hot water storage tank.
FIG. 4 is an explanatory view showing a modified embodiment of the electric water heater of the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Hot water storage tank 2 Water supply pipe 3 Hot water supply pipe 4 Lower heater 5 Upper heater 6 Insulation material 7 Reinforcement material 71 Metal plate 72 Synthetic resin foam 73 Angle material 8 Pump 9 Reheating pipe 10 Heat exchanger 11 Space part 12 Steam discharge pipe 13 Water level sensor

Claims (4)

貯湯タンクと、該貯湯タンクの下部に設けられた給水管と、貯湯タンクの上部に設けられた給湯管と、貯湯タンク内の下部に設けられた下部ヒータと、貯湯タンク内の上部に設けられた上部ヒータとを備えた電気温水器において、前記貯湯タンクを直方体状に形成するとともに、該貯湯タンクの周囲を、断熱材を芯材とする板状の補強材により枠状に取り囲んだことを特徴とする電気温水器。A hot water storage tank, a water supply pipe provided at a lower part of the hot water storage tank, a hot water supply pipe provided at an upper part of the hot water storage tank, a lower heater provided at a lower part of the hot water storage tank, and a water supply pipe provided at an upper part of the hot water storage tank In the electric water heater provided with an upper heater, the hot water storage tank is formed in a rectangular parallelepiped shape, and the periphery of the hot water storage tank is surrounded by a plate-like reinforcing material having a heat insulating material as a core material. Characterized electric water heater. 前記補強材を、金属板と合成樹脂発泡体とを一体成形して形成したことを特徴とする請求項1記載の電気温水器。The electric water heater according to claim 1, wherein the reinforcing member is formed by integrally molding a metal plate and a synthetic resin foam. 補強材の金属板が外側に、合成樹脂発泡体が内側になるように配設するようにしたことを特徴とする請求項2記載の電気温水器。3. The electric water heater according to claim 2, wherein the reinforcing metal plate is disposed outside and the synthetic resin foam is disposed inside. 貯湯タンクの水面上に空間部を設け、該空間部と外部を蒸気排出管により連通させたことを特徴とする請求項1、2又は3記載の電気温水器。4. The electric water heater according to claim 1, wherein a space is provided on the water surface of the hot water storage tank, and the space is communicated with the outside by a steam discharge pipe.
JP2003084273A 2003-03-26 2003-03-26 Electric water heater Withdrawn JP2004293839A (en)

Priority Applications (1)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009156548A (en) * 2007-12-27 2009-07-16 Ecotec Co Ltd Heat storage type electric boiler
JP2010096364A (en) * 2008-10-14 2010-04-30 Ecotec Co Ltd Electric water heater
JP2010112608A (en) * 2008-11-05 2010-05-20 Corona Corp Hot water storage tank device and assembling method for the same
JP2012202660A (en) * 2011-03-28 2012-10-22 Mitsubishi Electric Corp Storage water heater
JP2013217564A (en) * 2012-04-09 2013-10-24 Hitachi Appliances Inc Tank and water heater

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009156548A (en) * 2007-12-27 2009-07-16 Ecotec Co Ltd Heat storage type electric boiler
JP2010096364A (en) * 2008-10-14 2010-04-30 Ecotec Co Ltd Electric water heater
JP2010112608A (en) * 2008-11-05 2010-05-20 Corona Corp Hot water storage tank device and assembling method for the same
JP2012202660A (en) * 2011-03-28 2012-10-22 Mitsubishi Electric Corp Storage water heater
JP2013217564A (en) * 2012-04-09 2013-10-24 Hitachi Appliances Inc Tank and water heater

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