JP2008057898A - Hot water storage type electric water heater - Google Patents

Hot water storage type electric water heater Download PDF

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JP2008057898A
JP2008057898A JP2006237024A JP2006237024A JP2008057898A JP 2008057898 A JP2008057898 A JP 2008057898A JP 2006237024 A JP2006237024 A JP 2006237024A JP 2006237024 A JP2006237024 A JP 2006237024A JP 2008057898 A JP2008057898 A JP 2008057898A
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hot water
water storage
heater
storage tank
type electric
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Masahiro Kuroishi
正宏 黒石
Tomoko Sato
知子 佐藤
Makoto Hatakeyama
真 畠山
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Toto Ltd
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<P>PROBLEM TO BE SOLVED: To provide a hot water storage type electric water heater having excellent installation property that can be installed at the lower face of a wash basin counter of a kitchen or a washroom, and excellent hot water push-out property and draining property of water in a tank. <P>SOLUTION: The hot water storage type electric water heater comprises a hot water storage tank 10 having a water inlet part 11, a hot water outlet part 12, a hot water storage part 6 formed between the water inlet part and the hot water outlet part, and partition wall parts 4, 5 for forming water or hot water meandering passages in the hot water storage part. The partition wall parts are provided in the hot water storage part so that the meandering passages are formed along an almost horizontal plane in the installed state of the hot water storage type electric water heater, and a drain part 25 is provided at a lower face or a lower part of a side face of the hot water storage tank, viewed in the acting direction of gravity. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、例えばキッチンやトイレルームの手洗い器カウンタの下面などに設置できる設置性に優れ、かつ湯の押出し性やタンク内の水の排水性に優れた貯湯式電気温水器に関する。   The present invention relates to a hot water storage type electric water heater that is excellent in installation property that can be installed, for example, on the lower surface of a hand-washer counter in a kitchen or toilet room, and that is excellent in extruding hot water and draining water in a tank.

従来から建物の壁などに縦長の状態で設置され、貯湯タンクの下部から水を入れて上部から沸き上がった湯を出す貯湯式電気温水器が広く用いられてきた。設置状態で貯湯タンクがこのように縦長となった理由は、貯湯タンクの下部から入った水が温められると湯と水の密度差により湯が自然に上昇する作用を利用して湯の押出し性、即ち高温の湯を安定して押し出す性能を高めているためである。そして、近年、例えばトイレルーム内などの手洗い用の蛇口に温水を供給するために、トイレルーム内に電気温水器が直接設置されることが多くなっている。   Conventionally, a hot water storage type electric water heater that is installed in a vertically long state on a wall of a building and puts water from a lower part of a hot water storage tank and discharges hot water from the upper part has been widely used. The reason why the hot water storage tank is so long in the installed state is that the hot water can be pushed out by using the action of the hot water naturally rising due to the difference in density between the hot water and the water when the water entered from the bottom of the hot water tank is warmed. That is, the performance of stably extruding high-temperature hot water is enhanced. In recent years, for example, an electric water heater is often installed directly in a toilet room in order to supply hot water to a faucet for hand-washing such as in a toilet room.

トイレルームへの貯湯式電気温水器の設置に際して、トイレルーム内のインテリア性としての美観や統一感を損なわないために、貯湯式電気温水器自体を従来のように壁面に縦長の状態で直接設置する代わりに、例えば洗面器カウンタやキャビネットの裏面でトイレルーム内から目に付かない場所に貯湯タンクを寝かせた状態で設置されることが望まれている。   When installing a hot water storage type electric water heater in a toilet room, the hot water storage type electric water heater itself is installed directly on the wall surface in a vertically long state as before, so as not to impair the aesthetics and unity of the interior of the toilet room. Instead, for example, it is desired that the hot water storage tank be laid in a place where it cannot be seen from the toilet room on the back of the basin counter or the cabinet.

なお、このような貯湯タンクを寝かせた状態で設置する態様は、例えばキッチンカウンタの下面やキッチンキャビネットのケコミ部などに貯湯式電気温水器を設置する場合にも適用でき、これによってキッチンルームの壁面に貯湯式電気温水器を設置しなくて済み、キッチンルームの美観やインテリア性を向上できるので、このような設置形態は広く望まれている。   Note that such a mode in which the hot water storage tank is installed in a laid state can also be applied, for example, when a hot water storage type electric water heater is installed on the underside of the kitchen counter or a kitchen cabinet. This type of installation is widely desired because it does not require a hot water storage type electric water heater to be installed in the kitchen and can improve the beauty and interior of the kitchen room.

そして、このような寝かせた状態で設置される貯湯式電気温水器の場合、これをカウンタ下面などの狭いスペースに設置するためには貯湯タンクの形状をかなり扁平した薄型にする必要がある。しかしながら、上下方向の高さを低くして扁平にした横長の貯湯タンクを有する貯湯式電気温水器の場合、設置状態で貯湯タンクが水平方向に広くなるため、湯と水が接する面が広くなり、湯と水が混合し易い。そこで、このような薄型の貯湯タンクを備えた寝かせ置き式の貯湯式電気温水器の押し出し性を改善した特別な構成も考えられている(例えば、特許文献1及び特許文献2参照)。かかる特許文献1及び特許文献2に記載の貯湯式電気温水器は、流路の断面積を小さくすることで水と湯の混合を抑制し湯の押出し性を向上させるために、貯湯式電気温水器の設置状態で略鉛直面に沿って水や湯が蛇行する流路を形成する仕切り壁部を貯湯部内に備えている。
特開2002−89961号公報(図2) 特開平7−12405号公報(図6)
And in the case of the hot water storage type electric water heater installed in such a laid state, in order to install it in a narrow space such as the counter lower surface, it is necessary to make the shape of the hot water storage tank quite flat and thin. However, in the case of a hot water storage type electric water heater having a horizontally long hot water storage tank that is flattened with a low vertical height, the hot water storage tank becomes wide in the installed state, so the surface where hot water and water come into contact with each other becomes wider. Easy to mix hot water and water. Then, the special structure which improved the extrusion property of the lay-down type hot water storage type electric water heater provided with such a thin hot water storage tank is also considered (for example, refer patent document 1 and patent document 2). Such hot water storage type electric water heaters described in Patent Document 1 and Patent Document 2 reduce the cross-sectional area of the flow path so as to suppress mixing of water and hot water and improve the extrudability of hot water. In the hot water storage part, the partition wall part which forms the flow path in which water and hot water meander along a substantially vertical surface in the installation state of the vessel is provided.
Japanese Patent Laid-Open No. 2002-89961 (FIG. 2) JP-A-7-12405 (FIG. 6)

しかしながら、貯湯式電気温水器の設置状態で略鉛直面に沿って水や湯が蛇行する流路を形成する仕切り壁部を貯湯部内に設けた構成では、流路が高さ方向に上下しながら繋がっているので、上から下に向かって流れる流路において水と湯の間の密度差に起因して湯が上に浮き易くかつ水が下に落ち易くなり、このような下り流路において水が湯を先に追い越してしまう。   However, in a configuration in which a partition wall portion that forms a flow path in which water and hot water meander along a substantially vertical surface in a state where the hot water storage type electric water heater is installed is provided in the hot water storage section, the flow path moves up and down in the height direction. As a result, the hot water tends to float up and the water tends to fall down in the flow path that flows from top to bottom due to the density difference between the water and hot water. Will overtake the hot water first.

このように各下り流路において水が湯を追い越してしまうと、給湯器の出湯部から湯のみが押し出されずに水と湯が混合した状態で押し出されてしまい、
湯の押出し性が悪くなる。
In this way, when water overtakes hot water in each downstream channel, only hot water is not pushed out from the hot water outlet of the water heater, but is pushed out in a mixed state of water and hot water,
The extrudability of hot water deteriorates.

また、カウンタ下面などの狭いスペースに設置するために、上下方向の高さを低くして、水平方向の代表長さ(水平方向断面が長方形状の場合の辺長や楕円形状の場合の径長など)に比べて高さが低いような扁平にした横長の貯湯タンクを有した貯湯式電気温水器を設置する場合において貯湯式電気温水器の設置状態で略鉛直面に沿って流路を形成するような仕切り壁部を設けた構成では、上記の不具合に加えて、水と湯の混合を防止する観点から流路の断面積を小さくする必要上、全体的な流水方向に対して垂直な方向のみの仕切り壁部では流路が仕切り壁部に沿った方向に幅広くなり、十分に流路の断面積を小さくできない。この場合、全体的な流水方向に対して平行な方向の仕切り壁部を更に設けることで流路の断面積を小さくすることが考えられるが、貯湯タンクの構造が複雑になると共に組み付け性が低下するのでコストアップになり、現実的ではない。   Also, in order to install in a narrow space such as the counter lower surface, the vertical height is lowered and the horizontal representative length (the side length when the horizontal cross section is rectangular or the length of the ellipse when it is elliptical) In the case of installing a hot water type electric water heater that has a flat and horizontally long hot water storage tank that is lower than the height of the hot water type electric water heater, a flow path is formed along a substantially vertical plane. In the configuration provided with such a partition wall portion, in addition to the above-mentioned problems, it is necessary to reduce the cross-sectional area of the flow channel from the viewpoint of preventing mixing of water and hot water, and it is perpendicular to the overall flowing water direction. In the partition wall portion having only the direction, the flow path becomes wider in the direction along the partition wall portion, and the cross-sectional area of the flow path cannot be sufficiently reduced. In this case, it may be possible to reduce the cross-sectional area of the flow path by further providing a partition wall portion in a direction parallel to the overall flowing water direction, but the structure of the hot water storage tank is complicated and the assembling property is lowered. This increases costs and is not realistic.

また、貯湯式電気温水器をカウンタ等の裏面に設置して入水部と出湯部に配管を一旦接続すると、電気温水器を配管から外して傾けたりすることができなくなる。そのため、このような略鉛直面に沿って流路を形成する仕切り壁部を多数備えた貯湯タンクを有する貯湯式電気温水器の場合、各仕切り壁部によって形成される上から下の流路と下から上への流路毎に水抜き部を設けなければ貯湯タンク内の水抜きを完全に行うことができない。そして、このように多数の水抜き部を設けた場合、水抜き後に水抜き部を一箇所でもうっかり閉じ忘れると、貯湯式電気温水器の再作動時にこの水抜き部から水や湯が大量に漏れ出してしまい、大変な事態を招く虞れがある。   Moreover, once the hot water storage type electric water heater is installed on the back surface of the counter or the like and the pipe is once connected to the water inlet and the hot water outlet, the electric water heater cannot be detached from the pipe and tilted. Therefore, in the case of a hot water storage type electric water heater having a hot water storage tank having a large number of partition wall portions that form a flow path along such a substantially vertical surface, the flow path from the top to the bottom formed by each partition wall portion and Unless a drainage part is provided for each flow path from the bottom to the top, the drainage in the hot water storage tank cannot be performed completely. And when a lot of drainage parts are provided in this way, if you forget to close the drainage part in one place after draining water, a lot of water and hot water will come out of this drainage part when the hot water storage type electric water heater is restarted. It may leak out and cause a serious situation.

本発明の目的は、例えばキッチンやトイレルームの手洗い器カウンタの下面などに設置できる設置性に優れ、かつ湯の押出し性やタンク内の水の排水性に優れた貯湯式電気温水器を提供することにある。   An object of the present invention is to provide a hot water storage type electric water heater that is excellent in installation property that can be installed, for example, on the lower surface of a hand-washer counter in a kitchen or toilet room, and that is excellent in extruding hot water and draining water in a tank. There is.

上述した課題を解決するために、本発明にかかる貯湯式電気温水器は、
貯湯タンクを備えた貯湯式電気温水器において、
前記貯湯タンクは、入水部と、出湯部と、前記入水部と出湯部との間に形成された貯湯部と、前記貯湯部内に水又は湯の蛇行流路を形成するための仕切り壁部を有し、
前記貯湯式電気温水器の設置状態において前記蛇行流路が略水平な面に沿って形成されるように前記仕切り壁部が前記貯湯部内に備わり、かつ重力の作用方向で見て貯湯タンクの下面又は側面下方に水抜き部が設けられたことを特徴としている。
In order to solve the problems described above, a hot water storage type electric water heater according to the present invention is:
In hot water storage type electric water heater equipped with hot water storage tank,
The hot water storage tank includes a water inlet, a hot water outlet, a hot water reservoir formed between the water inlet and the hot water outlet, and a partition wall portion for forming a meandering channel for water or hot water in the hot water reservoir. Have
The partition wall portion is provided in the hot water storage portion so that the meandering flow path is formed along a substantially horizontal surface in the installed state of the hot water storage type electric water heater, and the lower surface of the hot water storage tank as viewed in the direction of gravity. Alternatively, a water drainage portion is provided below the side surface.

仕切り壁部により貯湯タンク内に連続した狭い流路を形成し、かつこの流路が貯湯式電気温水器の設置状態で略水平面に沿って蛇行するようになっているので、設置状態で流路が略鉛直面に沿って蛇行する従来型の貯湯式電気温水器のように上から下に向かう流路において湯水の密度差によって水が湯より早くこの流路を降下するようなことが生じず、これにより湯に水が混合することが抑えられ、湯の押し出し性が向上する。   The partition wall part forms a continuous narrow flow path in the hot water storage tank, and this flow path meanders along a substantially horizontal plane when the hot water storage type electric water heater is installed. However, the water does not descend earlier than hot water due to the density difference of hot water in the flow path from top to bottom as in the conventional hot water storage type electric water heater that meanders along a substantially vertical plane. Thus, mixing of water with hot water is suppressed, and the pushability of hot water is improved.

また、カウンタ下面などの狭いスペースに設置するために、上下方向の高さを低くして水平方向の代表長さ(水平方向断面が長方形状の場合の辺長や楕円形状の場合の径長など)に比べて高さが低くいような扁平にした横長の貯湯タンクを有した貯湯式電気温水器を設置する場合、全体的な流水方向に対して垂直な方向のみに仕切り壁部を設置したものより更に十分に流路の断面積を小さくでき、貯湯タンクの構造を極端に複雑化させずに済み、貯湯式電気温水器自体のコストを抑えかつ組み付け性を向上させることができる。   Also, in order to install it in a narrow space such as the lower surface of the counter, the height in the vertical direction is lowered and the representative length in the horizontal direction (side length when the horizontal cross section is rectangular, diameter length when elliptical, etc.) When installing a hot water storage type electric water heater that has a flat, horizontally long hot water storage tank that is not as tall as), the partition wall is installed only in the direction perpendicular to the overall water flow direction. The cross-sectional area of the flow path can be made sufficiently smaller than that of the product, the structure of the hot water storage tank can be prevented from becoming extremely complicated, the cost of the hot water storage type electric water heater itself can be reduced, and the assembling property can be improved.

また、貯湯タンク内の流路が略鉛直面に沿って蛇行せず略水平面に沿って蛇行するようになっているので、貯湯タンクの下面又は側面下方に水抜き部を設けることで、貯湯式電気温水器を設置したままの姿勢で水抜き部を開放するだけで貯湯タンクの入水部と出湯部に連結された配管を外すことなく貯湯タンク内の水を全て排水でき、メンテナンス性が向上する。   In addition, the flow path in the hot water storage tank does not meander along the substantially vertical plane but meanders along the substantially horizontal plane. By simply opening the drain with the electric water heater installed, all the water in the hot water tank can be drained without removing the pipes connected to the hot water tank's water inlet and outlet, improving maintainability. .

具体的には、貯湯式電気温水器は長期間使用しているとタンク内が水垢などで汚れることがあるので、貯湯タンクの水を定期的に抜き、水がきれいになるまで給水と排水を繰り返して清掃する必要がある。貯湯タンク内が凍結する畏れがあるときもタンク内の水を抜く場合がある。   Specifically, if the hot water storage type electric water heater is used for a long time, the inside of the tank may become dirty with scales, etc., so the water in the hot water storage tank is periodically drained and water supply and drainage are repeated until the water is clean. Need to be cleaned. Even when the hot water tank is frozen, the water in the tank may be drained.

そして、水抜きによる貯湯タンク内の水垢の水抜きによる掃除は三ヶ月に一回程度行う必要があり、凍結による水抜きは凍結の畏れがあるときに随時行う必要がある。そのため、設置状態で流路が略鉛直面に沿って形成される従来型の貯湯式電気温水器では、下り流路や昇り流路毎に設けた多数の水抜き栓を上述した水抜き作業毎に全て開放しなければならず、水抜き作業が極めてやり難くなる。しかしながら、本発明による貯湯式電気温水器は、設置状態で流路が略水平面に沿うようになっているので、水抜き栓を貯湯タンクの下面又は側面下方の一箇所だけ設ければ良くなり、水抜き作業を簡単に行うことができ、貯湯式電気温水器の使い勝手を格段に向上させることができる。   And, it is necessary to perform cleaning by draining the scale in the hot water storage tank by draining about once every three months, and draining by freezing should be performed at any time when there is freezing. Therefore, in the conventional hot water storage type electric water heater in which the flow path is formed along a substantially vertical surface in the installed state, a large number of drain plugs provided for each of the downstream flow path and the upward flow path are provided for each of the above draining operations. It is very difficult to drain the water. However, in the hot water storage type electric water heater according to the present invention, since the flow path is substantially along the horizontal plane in the installed state, it is only necessary to provide a drain plug at one place below the lower surface or side surface of the hot water storage tank, The water draining operation can be easily performed, and the usability of the hot water storage type electric water heater can be greatly improved.

また、本発明の請求項2に記載の貯湯式電気温水器は、請求項1に記載の貯湯式電気温水器において、
前記貯湯タンクの内部にヒータを備えるか、又は外側にヒータを直接接するように備えたことを特徴としている。
The hot water storage type electric water heater according to claim 2 of the present invention is the hot water storage type electric water heater according to claim 1,
A heater is provided inside the hot water storage tank, or a heater is provided in direct contact with the outside.

ヒータを貯湯タンクの外に離して備えると、循環用の特別なポンプを介して貯湯タンク内の湯を循環させなければならず、余分なポンプの設置が必要となり、貯湯式電気温水器自体の構造も複雑化して全体が大型化する。しかしながら、本発明ではヒータを貯湯タンクの内部に備えるか、又は外側に直接接するように備えているので、このような問題が生じない。   If the heater is provided outside the hot water storage tank, the hot water in the hot water storage tank must be circulated through a special pump for circulation, and an extra pump must be installed. The structure becomes complicated and the whole size increases. However, in the present invention, since the heater is provided inside the hot water storage tank or directly in contact with the outside, such a problem does not occur.

また、本発明の請求項3に記載の貯湯式電気温水器は、請求項1に記載の貯湯式電気温水器において、
前記貯湯タンクの内部にヒータを備え、かつ前記ヒータが前記仕切り壁部を兼ねていることを特徴としている。
The hot water storage type electric water heater according to claim 3 of the present invention is the hot water storage type electric water heater according to claim 1,
A heater is provided inside the hot water storage tank, and the heater also serves as the partition wall.

ヒータが仕切り壁部を兼ねているので貯湯タンクを小型化でき、ひいては電気温水器全体の大きさを小型化できる。   Since the heater also serves as the partition wall, the hot water storage tank can be reduced in size, and as a result, the overall size of the electric water heater can be reduced.

また、ヒータが仕切り壁部を兼ねているので、水に直接接するヒータの面積を十分にとることができ、沸き上げ性、即ち均一に沸き上がる効率が向上する。   Further, since the heater also serves as the partition wall, a sufficient area of the heater that is in direct contact with water can be secured, and the boiling property, that is, the efficiency of uniform boiling is improved.

また、本発明の請求項4に記載の貯湯式電気温水器は、請求項2に記載の貯湯式電気温水器において、
前記ヒータが前記貯湯式電気温水器の設置状態で重力の作用方向で見て前記貯湯タンクの少なくとも1/2より下側の面に備わったことを特徴としている。
The hot water storage type electric water heater according to claim 4 of the present invention is the hot water storage type electric water heater according to claim 2,
The heater is provided on a surface at least lower than 1/2 of the hot water storage tank as viewed in the direction of gravity when the hot water storage type electric water heater is installed.

貯湯タンク内においてヒータより更に下側に空間が存在すると、入水部から入った水のうち一部の水がその空間に滞留して沸き上げ効率が低下するが、少なくとも1/2より下側の面にヒータを備えることで、このようないわゆる死に水の溜まる空間を小さくする。その結果、湯と水の密度差により重力で下がった水がヒータに十分接するようになり、入水部から入水された水のうち死に水の量をより少なくでき、貯湯タンク内でより多くの湯を沸かすことができる。   If there is a space further below the heater in the hot water storage tank, a part of the water that has entered from the water inlet will stay in the space and lower the boiling efficiency, but at least lower than 1/2 By providing a heater on the surface, the so-called dead water accumulation space is reduced. As a result, the water that has fallen due to gravity due to the density difference between the hot water and the water comes into sufficient contact with the heater, and the amount of water that has entered the water inlet can be diminished and more hot water is stored in the hot water storage tank. Can be boiled.

また、本発明の請求項5に記載の貯湯式電気温水器は、請求項2乃至請求項4の何れかに記載の貯湯式電気温水器において、
前記ヒータが前記入水部の近傍に備わったことを特徴としている。
Moreover, the hot water storage type electric water heater according to claim 5 of the present invention is the hot water storage type electric water heater according to any one of claims 2 to 4,
The heater is provided in the vicinity of the water inlet.

入水部の近傍では入水した水が殆ど温度上昇していないので、この部分における水をヒータを介して効率良く温めることができる。   In the vicinity of the water inlet, the temperature of the incoming water has hardly increased, so the water in this portion can be efficiently heated via the heater.

また、本発明の請求項6に記載の貯湯式電気温水器は、請求項2乃至請求項4の何れかに記載の貯湯式電気温水器において、
前記ヒータが複数のヒータからなり、各ヒータが前記入水部と出湯部とを結ぶ方向に分散配置されたことを特徴としている。
Moreover, the hot water storage type electric water heater according to claim 6 of the present invention is the hot water storage type electric water heater according to any one of claims 2 to 4,
The heater is composed of a plurality of heaters, and each heater is dispersedly arranged in a direction connecting the water inlet and the hot water outlet.

ヒータをこのように分散配置することで、貯湯式電気温水器の使い方に応じて貯湯タンク内に入水した水の部分の滞留位置が変化しても、対応するヒータを加熱することにより、水の部分を中心に沸き上げることが可能となり、貯湯タンク内の湯全体を冷ますことなく、効率良く沸き上げて出湯部からそのまま流出させることができる。   By distributing the heaters in this way, even if the staying position of the water that has entered the hot water storage tank changes according to how the hot water storage type electric water heater is used, It becomes possible to boil around the part, and it is possible to boil it efficiently and let it flow out from the hot water outlet without cooling the whole hot water in the hot water storage tank.

本発明によると、例えばキッチンやトイレルームの手洗い器カウンタの下面などに設置できる設置性に優れ、かつ湯の押出し性やタンク内の水の排水性に優れた貯湯式電気温水器を提供できる。   ADVANTAGE OF THE INVENTION According to this invention, the hot water storage type electric water heater excellent in the installation property which can be installed, for example in the lower surface of the hand-washer counter of a kitchen or a toilet room, etc. and excellent in the extrudability of hot water and the drainage property of the water in a tank can be provided.

具体的には、仕切り壁部により貯湯タンク内に連続した狭い流路を形成し、かつこの流路が貯湯式電気温水器の設置状態で略水平面に沿って蛇行するようになっているので、設置状態で流路が略鉛直面に沿って蛇行する従来型の貯湯式電気温水器のように上から下に向かう流路において湯水の密度差によって水が湯より早くこの流路を降下するようなことが生じず、これにより湯に水が混合することが抑えられ、湯の押し出し性が向上する。   Specifically, the partition wall portion forms a continuous narrow flow path in the hot water storage tank, and this flow path is meandering along a substantially horizontal plane in the installed state of the hot water storage type electric water heater, Like a conventional hot water storage type electric water heater in which the flow path meanders along a substantially vertical plane in the installed state, water flows down the flow path earlier than hot water due to the difference in hot water density in the flow path from top to bottom. Nothing happens and this prevents water from mixing with the hot water and improves the pushability of the hot water.

また、貯湯タンク内の流路が略鉛直面に沿って蛇行せず略水平面に沿って蛇行するようになっているので、貯湯タンクの下面又は側面下方に水抜き部を設けることで、貯湯式電気温水器を設置したままの姿勢で水抜き部を開放するだけで貯湯タンクの入水部と出湯部に連結された配管を外すことなく貯湯タンク内の水を全て排水でき、メンテナンス性が向上する。   In addition, since the flow path in the hot water storage tank does not meander along a substantially vertical plane but meanders along a substantially horizontal plane, by providing a drainage portion on the lower surface or lower side of the hot water storage tank, By simply opening the drain with the electric water heater installed, all the water in the hot water tank can be drained without removing the pipes connected to the hot water tank's water inlet and outlet, improving maintainability. .

具体的には、貯湯式電気温水器は長期間使用しているとタンク内が水垢などで汚れることがあるので、貯湯タンクの水を定期的に抜き、水がきれいになるまで給水と排水を繰り返して清掃する必要がある。貯湯タンク内が凍結する畏れがあるときもタンク内の水を抜く場合がある。   Specifically, if the hot water storage type electric water heater is used for a long time, the inside of the tank may become dirty with scales, etc., so the water in the hot water storage tank is periodically drained and water supply and drainage are repeated until the water is clean. Need to be cleaned. Even when the hot water tank is frozen, the water in the tank may be drained.

そして、水抜きによる貯湯タンク内の水垢の水抜きによる掃除は三ヶ月に一回程度行う必要があり、凍結による水抜きは凍結の畏れがあるときに随時行う必要がある。そのため、設置状態で流路が略鉛直面に沿って形成される従来型の貯湯式電気温水器では、下り流路や昇り流路毎に設けた多数の水抜き栓を上述した水抜き作業毎に全て開放しなければならず、水抜き作業が極めてやり難くなる。しかしながら、本発明による貯湯式電気温水器は、設置状態で流路が略水平面に沿うようになっているので、水抜き栓を貯湯タンクの下面又は側面下方の一箇所だけ設ければ良くなり、水抜き作業を簡単に行うことができ、貯湯式電気温水器の使い勝手を格段に向上させることができる。   And, it is necessary to perform cleaning by draining the scale in the hot water storage tank by draining about once every three months, and draining by freezing should be performed at any time when there is freezing. Therefore, in the conventional hot water storage type electric water heater in which the flow path is formed along a substantially vertical surface in the installed state, a large number of drain plugs provided for each of the downstream flow path and the upward flow path are provided for each of the above draining operations. It is very difficult to drain the water. However, in the hot water storage type electric water heater according to the present invention, since the flow path is substantially along the horizontal plane in the installed state, it is only necessary to provide a drain plug at one place below the lower surface or side surface of the hot water storage tank, The water draining operation can be easily performed, and the usability of the hot water storage type electric water heater can be greatly improved.

以下、本発明の一実施形態にかかる貯湯式電気温水器について図面に基づいて説明する。図1は、本発明の一実施形態にかかる貯湯式電気温水器に備わった貯湯タンク10の概略斜視図である。また、図2は、貯湯タンク10の内部を模式的に示す平面図である。また、図3は貯湯タンク10の組み立て前の状態を示す分解斜視図である。なお、図1乃至図3の貯湯タンク10の外形寸法や貯湯タンク10に備わった各仕切り壁部4,5の数は互いに厳密には一致させていない。   Hereinafter, a hot water storage type electric water heater according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic perspective view of a hot water storage tank 10 provided in a hot water storage type electric water heater according to an embodiment of the present invention. FIG. 2 is a plan view schematically showing the inside of the hot water storage tank 10. FIG. 3 is an exploded perspective view showing a state before the hot water storage tank 10 is assembled. It should be noted that the external dimensions of the hot water storage tank 10 in FIGS. 1 to 3 and the number of partition wall portions 4 and 5 provided in the hot water storage tank 10 do not exactly match each other.

貯湯式電気温水器は、ヒータhを備えた貯湯タンク10と、ここでは詳細には図示しないリモコン又は操作パネルと、リモコン又は操作パネルで貯湯タンク10のヒータhを作動させる制御部を備えている。そして、貯湯タンク10は、図1に示すように、6つの平面部10a〜10fを有する直方体状の扁平箱形をなしている。そして、貯湯タンク10の内部には複数の仕切り壁部4,5で仕切られた貯湯部6が形成されている。   The hot water storage type electric water heater includes a hot water storage tank 10 provided with a heater h, a remote controller or an operation panel not shown in detail here, and a control unit that operates the heater h of the hot water storage tank 10 with the remote control or the operation panel. . And as shown in FIG. 1, the hot water storage tank 10 has comprised the rectangular parallelepiped flat box shape which has the six plane parts 10a-10f. A hot water storage section 6 partitioned by a plurality of partition walls 4, 5 is formed inside the hot water storage tank 10.

貯湯タンク10の長手方向両端に形成された2つの平面部10c,10dのうち、一端側の平面部10cには、貯湯部6と貯湯タンク10の外部に設けられる入水流路を連通接続させる入水部11が設けられている。また、他端側の平面部10dには、貯湯部6と貯湯タンク10の外部に設けられる出湯流路とを連通接続させる出湯部12が設けられている。   Of the two flat portions 10c, 10d formed at both ends in the longitudinal direction of the hot water storage tank 10, the flat water portion 10c on one end side is connected to the hot water storage portion 6 and an incoming water flow channel provided outside the hot water storage tank 10 in communication. Part 11 is provided. Further, a hot water discharge portion 12 that connects the hot water storage portion 6 and a hot water flow path provided outside the hot water storage tank 10 to each other is provided on the flat surface portion 10d on the other end side.

貯湯部6は、複数の仕切り壁部4,5によって入水部11と出湯部12との間に形成された細長い蛇行流路をなしている。この蛇行流路を形成する各仕切り壁部4,5は、貯湯タンク10の最も広い平面部である平面部10e,10fに対して略垂直に貯湯タンク10の厚さ方向に延在する矩形板状をなしている。   The hot water storage section 6 forms a long and narrow meandering channel formed between the water inlet section 11 and the hot water outlet section 12 by a plurality of partition walls 4 and 5. The partition walls 4 and 5 forming the meandering channel are rectangular plates extending in the thickness direction of the hot water storage tank 10 substantially perpendicular to the flat surface portions 10e and 10f which are the widest flat surface portions of the hot water storage tank 10. It has a shape.

仕切り壁部4の4つの縁部のうち3つの縁部はそれぞれ、平面部10a,10e,10fに接している。また、仕切り壁部4は平面部10bには接しておらず、仕切り壁部4と平面部10bとの間には隙間が生じている。即ち、仕切り壁部4は、貯湯タンク10の長手方向で見た場合に仕切り壁部4の両側の空間を仕切っているが、仕切り壁部4の両側の空間は、仕切り壁部4と平面部10bとの間の隙間を介して連通されている。   Of the four edge portions of the partition wall portion 4, three edge portions are in contact with the flat portions 10a, 10e, and 10f, respectively. Moreover, the partition wall part 4 is not in contact with the flat part 10b, and a gap is generated between the partition wall part 4 and the flat part 10b. That is, the partition wall 4 partitions the space on both sides of the partition wall 4 when viewed in the longitudinal direction of the hot water storage tank 10, but the space on both sides of the partition wall 4 is separated from the partition wall 4 by a plane portion. It communicates through a gap with 10b.

一方、仕切り壁部5の4つの縁部のうち3つの縁部はそれぞれ、平面部10b,10e,10fに接している。また、仕切り壁部5は平面部10aには接しておらず、仕切り壁部5と平面部10aとの間には隙間が生じている。即ち、仕切り壁部5は、貯湯タンク10の長手方向で見た場合に仕切り壁部5の両側の空間を挟むように仕切っているが、仕切り壁部5の両側の空間は、仕切り壁部5と平面部10aとの間の隙間を介して連通されている。   On the other hand, three edge portions of the four edge portions of the partition wall portion 5 are in contact with the flat portions 10b, 10e, and 10f, respectively. Moreover, the partition wall part 5 is not in contact with the flat part 10a, and a gap is generated between the partition wall part 5 and the flat part 10a. That is, the partition wall 5 is partitioned so as to sandwich the space on both sides of the partition wall 5 when viewed in the longitudinal direction of the hot water storage tank 10, but the space on both sides of the partition wall 5 is separated from the partition wall 5. And the plane portion 10a.

かかる仕切り壁部4及び仕切り壁部5は、貯湯タンク10の長手方向に所定間隔隔てて幅方向互いに反対側に偏倚しながら交互に設けられている。これによって、貯湯部6の内部には、図2に示すように、貯湯部6の厚さ方向に対して略垂直な方向に蛇行する蛇行流路が形成される。ここで、貯湯部6の厚さ方向とは、貯湯タンク10の最も広い平面部をなす平面部10e,10fに対して垂直な方向である。   The partition wall portions 4 and the partition wall portions 5 are alternately provided while being biased to the opposite sides in the width direction at a predetermined interval in the longitudinal direction of the hot water storage tank 10. As a result, a meandering flow path that meanders in a direction substantially perpendicular to the thickness direction of the hot water storage section 6 is formed in the hot water storage section 6 as shown in FIG. Here, the thickness direction of the hot water storage section 6 is a direction perpendicular to the flat surface portions 10 e and 10 f forming the widest flat surface portion of the hot water storage tank 10.

そして、この貯湯式電気温水器は、平面部10e,10fが鉛直方向上下面をそれぞれなすように寝かせた状態で図示しないブラケット等の取付け具やねじ等の締結具を介して例えばキッチンやトイレルームの洗面器カウンタ裏面に取り付けられるようになっている。そして、貯湯式電気温水器の取付け状態で各仕切り壁部4,5によって形成される貯湯タンク10の蛇行流路が略水平面に沿って形成されるようになっている。   And this hot water storage type electric water heater is, for example, a kitchen or a toilet room through a fixture such as a bracket (not shown) or a fastener such as a screw in a state in which the flat portions 10e and 10f are laid so as to form vertical top and bottom surfaces, respectively. It is designed to be attached to the back of the basin counter. And the meandering flow path of the hot water storage tank 10 formed by each partition wall part 4 and 5 in the attachment state of the hot water storage type electric water heater is formed along a substantially horizontal plane.

貯湯タンク10の長手方向の略中央における貯湯部内には、図1に示すように、仕切り壁部5の代わりに仕切り壁部4,5に対して略平行に設けられた矩形板状のヒータhが設けられている。ヒータhとしては、例えば、セラミックヒータ、又は、真鍮、鉄、アルミニウムなどにシーズヒータを鋳込み板状に加工した鋳込みヒータなどを用いている。   As shown in FIG. 1, in the hot water storage portion at the approximate center in the longitudinal direction of the hot water storage tank 10, a rectangular plate heater h provided substantially parallel to the partition wall portions 4, 5 instead of the partition wall portion 5. Is provided. As the heater h, for example, a ceramic heater or a cast heater obtained by processing a sheathed heater into a cast plate shape in brass, iron, aluminum or the like is used.

ヒータhは、例えば貯湯タンク10の長手方向略中央部において他の仕切り壁部5に対応する位置に仕切り壁部5の代わりに設けられている。ヒータhは、貯湯タンク10の長手方向で見てヒータhを挟む両側の空間を仕切っているが、ヒータhを挟む両側の空間は、ヒータhと平面部10aとの間の隙間を介して連通されている。即ち、ヒータhは、貯湯部6内の水を加熱する機能を有し、かつ仕切り壁部4,5と共に蛇行流路の壁部としての機能も有している。   The heater h is provided in place of the partition wall portion 5 at a position corresponding to the other partition wall portion 5 at, for example, a substantially central portion in the longitudinal direction of the hot water storage tank 10. The heater h partitions a space on both sides sandwiching the heater h when viewed in the longitudinal direction of the hot water storage tank 10, but the spaces on both sides sandwiching the heater h communicate with each other via a gap between the heater h and the flat portion 10a. Has been. That is, the heater h has a function of heating the water in the hot water storage section 6 and also has a function as a wall section of the meandering channel together with the partition walls 4 and 5.

また、図1に示すように、貯湯部6の蛇行流路の第1レーン即ち入水部11からの水が最初に入水される流路であって貯湯式電気温水器を設置した状態で重力の作用方向で見て下面となる平面部10fに水抜き部25が設けられている。そして、水抜き部25には水抜き栓23によって開閉される水抜き管24が接続されている。なお、本実施形態では蛇行する流路のこの一箇所だけ水抜き部25が設けられている。   In addition, as shown in FIG. 1, the first lane of the meandering flow path of the hot water storage section 6, that is, the flow path where water from the water intake section 11 enters first, and with the hot water storage type electric water heater installed, The drainage part 25 is provided in the plane part 10f used as a lower surface when it sees in an action direction. A drain pipe 24 that is opened and closed by a drain plug 23 is connected to the drain section 25. In the present embodiment, the drainage portion 25 is provided only at this one portion of the meandering flow path.

図3は、貯湯タンク10の分解斜視図である。また、図4(a)は、仕切り壁部4を図1における貯湯タンク10の長手方向入水部側から見た模式図であり、図4(b)は、仕切り壁部5を図1における貯湯タンク10の長手方向入水部側から見た模式図である。   FIG. 3 is an exploded perspective view of the hot water storage tank 10. 4 (a) is a schematic view of the partition wall portion 4 as viewed from the longitudinal water inlet side of the hot water storage tank 10 in FIG. 1, and FIG. 4 (b) shows the partition wall portion 5 in the hot water storage in FIG. FIG. 3 is a schematic view seen from the longitudinal water inlet side of the tank 10.

貯湯タンク10は、図3から明らかなように、例えば厚さ方向の半分の位置で分割した2つの分割体10u,10sを組み合わせて扁平箱形に構成される。仕切り壁部5及びヒータhは、図4(b)に示すように、図1に示す平面部10b側に偏倚した状態で下側分割体10dに立設され、仕切り壁部5と平面部10aとの間には隙間が形成されている。また、仕切り壁部4は、図4(a)に示すように、図1に示す平面部10a側に偏倚した状態で上側分割体10uに垂設され、仕切り壁部4と平面部10bとの間には隙間が形成されている。   As apparent from FIG. 3, the hot water storage tank 10 is configured in a flat box shape by combining two divided bodies 10 u and 10 s divided at, for example, a half position in the thickness direction. As shown in FIG. 4B, the partition wall portion 5 and the heater h are erected on the lower divided body 10d in a state of being biased toward the flat portion 10b shown in FIG. 1, and the partition wall portion 5 and the flat portion 10a. A gap is formed between the two. Further, as shown in FIG. 4 (a), the partition wall portion 4 is suspended from the upper divided body 10u in a state of being biased toward the plane portion 10a shown in FIG. 1, and the partition wall portion 4 and the plane portion 10b are separated from each other. A gap is formed between them.

なお、上側分割体10uと下側分割体10sは互いに開口縁部を合わせて溶接して扁平の箱体をなす貯湯タンク10を構成している。   The upper divided body 10u and the lower divided body 10s constitute a hot water storage tank 10 that is welded with the opening edges aligned together to form a flat box.

続いて、以上の構成を有する貯湯式電気温水器の作用について説明する。まず、上述した構成を有する貯湯式電気温水器を例えばトイレルーム内の洗面器カウンタ裏面等に設置する。この場合、貯湯タンク内の流路が略水平面に沿いかつ水抜き部25の備わった平面10fが重力の作用方向で見て下面を向くように貯湯式電気温水器を設置する。このように貯湯式タンク10を寝かせた状態で取り付けることで、トイレルームの洗面器カウンタの裏面等、トイレルーム内から見て目立たない所に貯湯式電気温水器を設置でき、トイレルーム内の美観やインテリア性を損なうことがない。なお、貯湯式電気温水器をトイレルームの洗面器カウンタ下部空間の底面に寝かせ置きしても良い。また、貯湯式電気温水器をキッチンカウンタの下面やキッチンキャビネットのケコミ部等に設置しても良い。この場合、上述したように寝かせた状態で設置できるので、カウンタ下面の調理用備品や食材等の収容スペースを十分確保したまま設置できる。また、キッチンの壁面に貯湯式電気温水器を直接設置させずに済むのでキッチン廻りをすっきりさせ、インテリア性を向上させることができる。   Then, the effect | action of the hot water storage type electric water heater which has the above structure is demonstrated. First, a hot water storage type electric water heater having the above-described configuration is installed, for example, on the back surface of a basin counter in a toilet room. In this case, the hot water storage type electric water heater is installed so that the flow path in the hot water storage tank is substantially along the horizontal plane and the plane 10f provided with the drainage portion 25 faces the lower surface when viewed in the direction of gravity. By attaching the hot water storage tank 10 in the laid state in this way, the hot water storage type electric water heater can be installed in an inconspicuous place when viewed from the inside of the toilet room, such as the back of the washbasin counter in the toilet room, and the beauty of the toilet room And the interior is not impaired. A hot water storage type electric water heater may be laid on the bottom surface of the lower space of the basin counter in the toilet room. In addition, a hot water storage type electric water heater may be installed on the lower surface of the kitchen counter or in the corner of the kitchen cabinet. In this case, since it can be installed in a laid state as described above, it can be installed with sufficient storage space for cooking equipment, food, etc. on the lower surface of the counter. Moreover, since it is not necessary to install a hot water storage type electric water heater directly on the wall surface of the kitchen, the kitchen area can be cleaned and the interior can be improved.

また、貯湯式電気温水器の設置状態で水抜き部25が貯湯タンク10の下面に備わっているので、貯湯タンク内の流路が略水平面に沿うように仕切り壁部4,5が備わることと相まって水抜き部25を一箇所だけ設ければ、その水抜き部25から貯湯タンク内の全ての水を排水することができる。   Moreover, since the drainage part 25 is provided in the lower surface of the hot water storage tank 10 in the installation state of the hot water storage type electric water heater, the partition walls 4 and 5 are provided so that the flow path in the hot water storage tank is substantially along the horizontal plane. If only one drainage part 25 is provided together, all the water in the hot water storage tank can be drained from the drainage part 25.

このような構成を有した貯湯式電気温水器を上述した所定の場所に設置し、入水部11に水道の配管を接続し、出湯部12に混合栓等に通じる配管を接続し、図示しないリモコン又は操作パネルを操作して貯湯式電気温水器を作動させる。これによって、入水部11を介して貯湯部内に入水していた水はヒータhによって例えば85℃程度に加熱され、貯湯部内に貯められる。そして、湯の使用時には図示しない蛇口を開くことで入水部11から水が入水されると共に貯湯部6の出湯部付近の湯が出湯部12から押し出され、図示しない配管及び混合栓を経由しつつ、かつ適宜、別途水道から分岐された図示しない配管を介して混合栓に供給される水と混合され、蛇口から使用者の元に出湯される。   A hot water storage type electric water heater having such a configuration is installed at the above-mentioned predetermined place, a water pipe is connected to the water inlet 11, a pipe leading to a mixing tap is connected to the hot water outlet 12, and a remote controller (not shown) Alternatively, the hot water storage type electric water heater is operated by operating the operation panel. As a result, the water that has entered the hot water storage section via the water inlet section 11 is heated to, for example, about 85 ° C. by the heater h and stored in the hot water storage section. When hot water is used, a faucet (not shown) is opened to enter water from the water inlet 11 and hot water in the vicinity of the hot water outlet of the hot water storage 6 is pushed out from the hot water outlet 12 while passing through a pipe and a mixing plug (not shown). In addition, it is mixed with water supplied to the mixing tap through a pipe (not shown) branched separately from the water supply, and discharged from the tap to the user.

このとき、入水部11から貯湯部内に入水した水は、図2に示すように、仕切り壁部4,5及びヒータhによって形成された蛇行流路を進む。即ち、入水部11から入水した水は、仕切り壁部4,5、ヒータhにガイドされて、貯湯タンク10の短手方向に進みつつ、仕切り壁部4と平面部10bとの間の隙間、仕切り壁部5と平面部10aとの隙間、ヒータhと平面部10aとの隙間を介して隣のレーン(仕切り空間)に移り、貯湯タンク10内を略水平面に沿って蛇行しながら進む。   At this time, the water that has entered the hot water storage section from the water inlet section 11 travels through a meandering channel formed by the partition walls 4 and 5 and the heater h, as shown in FIG. That is, the water that has entered from the water inlet 11 is guided by the partition walls 4 and 5 and the heater h, and proceeds in the short direction of the hot water storage tank 10, while the gap between the partition wall 4 and the flat portion 10 b, It moves to the adjacent lane (partition space) through the gap between the partition wall portion 5 and the flat portion 10a and the gap between the heater h and the flat portion 10a, and proceeds while meandering in the hot water storage tank 10 along a substantially horizontal plane.

なお、本発明の貯湯式電気温水器は、貯湯タンク10を寝かせた状態で設置していることで、貯湯タンク内の水が仕切り壁部4,5により形成される蛇行流路に沿って略水平面に沿って蛇行しながら貯湯タンク内を進むので、貯湯タンク10を流れる水の鉛直方向に沿った流れ成分が少なくなる。このため、流れ方向の断面積が小さいことにより、湯と水とが混ざり合うことを抑制する効果に加え、自然対流の影響を受けにくく、安定して湯を押し出すことができる。即ち、流路が鉛直面に沿って形成されるように仕切り壁を設けた従来型の貯湯式電気温水器のように、水が湯を追い越して出湯部において湯に水が混ざってしまうことがない。   The hot water storage type electric water heater of the present invention is installed in a state where the hot water storage tank 10 is laid down, so that the water in the hot water storage tank is substantially along the meandering flow path formed by the partition walls 4 and 5. Since it advances in the hot water storage tank while meandering along the horizontal plane, the flow component along the vertical direction of the water flowing through the hot water storage tank 10 is reduced. For this reason, in addition to the effect which suppresses mixing of hot water and water by being small in the cross-sectional area of a flow direction, it is hard to be influenced by natural convection and can extrude hot water stably. That is, as in a conventional hot water storage type electric water heater in which a partition wall is provided so that the flow path is formed along a vertical surface, the water may overtake the hot water and mix with the hot water in the hot water outlet. Absent.

このように、入水部11から貯湯部内に入水した水が流路断面積の比較的小さい蛇行流路を蛇行しながら出湯部側に向かって進むため、入水部11から入水された比較的低温の水が出湯部近傍の湯と混ざり難くなり、出湯部12から出湯される湯の温度低下を防ぎ、出湯部12からの湯の押し出し効率を低下させずに済む。   In this way, the water that has entered the hot water storage section from the water inlet section 11 proceeds toward the hot water outlet section while meandering the meandering flow path having a relatively small channel cross-sectional area. It becomes difficult for water to mix with the hot water in the vicinity of the tapping part, preventing a decrease in the temperature of the hot water that is tapped from the tapping part 12, and not reducing the efficiency of pushing out the hot water from the tapping part 12.

また、入水部11から貯湯部内に入水した水の蛇行する方向が貯湯タンク10の厚さ方向に対して略垂直な方向となっている。即ち、貯湯式電気温水器の設置状態で流路が略水平面に沿っているので、略鉛直面に沿って蛇行する流路を備えた従来型の貯湯式電気温水器に比べて、より少ない仕切り壁部の数で流路断面積を小さくすることが可能となり、コストの低減や生産性の向上が図れる。   Further, the meandering direction of the water that has entered the hot water storage section from the water inlet section 11 is substantially perpendicular to the thickness direction of the hot water storage tank 10. That is, since the flow path is substantially horizontal in the installed state of the hot water storage type electric water heater, the number of partitions is smaller than that of a conventional hot water storage type electric water heater having a flow path meandering along a substantially vertical plane. The cross-sectional area of the flow path can be reduced by the number of wall portions, and costs can be reduced and productivity can be improved.

また、平面部10fを下にして貯湯タンク10を寝かせた状態で設置することで、板状のヒータhが重力の作用方向で見て貯湯タンク10の下面から上方に延在する構成となるので、貯湯部内の水を貯湯タンク10の下面から加熱することができ、高温流体の自然対流により低温になりがちな平面部10f近傍領域の温度低下を抑制でき、ヒータhによる湯の沸き上げ効率が向上する。   In addition, by installing the hot water storage tank 10 with the flat surface portion 10f facing down, the plate-like heater h extends upward from the lower surface of the hot water storage tank 10 when viewed in the direction of gravity. The water in the hot water storage section can be heated from the lower surface of the hot water storage tank 10, the temperature drop in the region near the flat section 10f that tends to become low temperature due to natural convection of the high temperature fluid can be suppressed, and the boiling efficiency of the hot water by the heater h can be reduced. improves.

また、本実施形態の場合、貯湯タンク10を寝かせた状態で設置しているので、仕切り壁が自然対流を塞き止めることがなく、湯を均一に沸き上げることが可能となる。また、ヒータhが貯湯部内で蛇行流路の壁部の一部として設けられていることで、コンパクトかつ簡単な構造となる。   Moreover, in the case of this embodiment, since the hot water storage tank 10 is installed in a laid state, the partition wall does not block natural convection, and hot water can be heated up uniformly. Further, since the heater h is provided as a part of the wall portion of the meandering channel in the hot water storage section, a compact and simple structure is obtained.

また、仕切り壁部4,5は、薄型扁平状の貯湯タンク10の強度を高める補強リブとしても機能し、貯湯タンク10の耐水圧性も向上させる。即ち、図3に示すように厚さ方向に二分割された貯湯タンク10の半部を互いに合わせてこの合わせ部を溶接することにより、薄形扁平状の貯湯タンク10を構成した時に仕切り壁部4,5が補強用リブとしての役目を果たし、薄形扁平状の貯湯タンク10の広い平面部10e及び10fの水圧による変形を抑え、貯湯タンク10の十分な耐久性を確保できる。   The partition walls 4 and 5 also function as reinforcing ribs that increase the strength of the thin and flat hot water storage tank 10 and improve the water pressure resistance of the hot water storage tank 10. That is, as shown in FIG. 3, when the thin flat hot water storage tank 10 is constructed by aligning the half portions of the hot water storage tank 10 divided into two in the thickness direction and welding the mating portions, the partition wall portion is formed. 4 and 5 serve as reinforcing ribs, and deformation due to water pressure of the wide flat portions 10e and 10f of the thin flat hot water storage tank 10 can be suppressed, and sufficient durability of the hot water storage tank 10 can be secured.

以上のように貯湯タンク内の水を基準温度まで沸き上げた後、入水部11から貯湯タンク内に水を流入させ、その水で沸き上がった湯を押し出すと共に流入した水によって温度が低下した貯湯タンク内の水を基準温度まで沸き上げるサイクルで貯湯式電気温水器を運転する。そして、貯湯式電気温水器の運転を定期的に停止して貯湯タンク内の湯や事前に冷ましておいた水を水抜き栓23を開放して水抜き部25から貯湯タンク内から排水する。   As described above, after boiling the water in the hot water storage tank to the reference temperature, the water is introduced into the hot water storage tank from the water inlet 11 to push out the hot water boiled with the water and the temperature of the hot water storage tank is lowered by the inflowed water. The hot water storage type electric water heater is operated in a cycle in which the water inside is boiled to the reference temperature. Then, the operation of the hot water storage type electric water heater is periodically stopped, and the hot water in the hot water storage tank or the water cooled in advance is discharged from the hot water storage tank through the water draining portion 25 by opening the drain plug 23.

貯湯式電気温水器は長期間使用しているとタンク内が水垢などで汚れることがあるので、貯湯タンク内の水を定期的に抜き、水がきれいになるまで給水と排水を繰り返して清掃する必要がある。貯湯タンク内が凍結する畏れがあるときも、凍結防止のために貯湯タンク内の水を抜く必要がある。   If the hot water storage type electric water heater is used for a long period of time, the inside of the tank may become dirty with scale, etc., so it is necessary to periodically drain the hot water tank and repeat cleaning with water supply and drainage until the water is clean There is. Even when the hot water tank is frozen, it is necessary to drain the hot water tank to prevent freezing.

なお、水抜きによる貯湯タンク内の水垢の掃除は三ヶ月に一回程度行う必要があり、凍結による水抜きは凍結の畏れがあるときに随時行う必要がある。そのため、設置状態で流路が略鉛直面に沿って形成される従来型の貯湯式電気温水器では、下り流路や昇り流路毎に設けた多数の水抜き栓を上述した水抜き作業毎に全て開かなければならず、水抜き作業が極めてやり難くなる。また、水抜き作業終了後に一箇所でも水抜き栓を締め忘れると、貯湯式電気温水器の再運転時に貯湯タンクから大量の水が漏れ出してしまう。しかしながら、本発明による貯湯式電気温水器は、設置状態で流路が略水平面に沿うようになっているので水抜き栓を貯湯タンクの下面又は側面下方の一箇所だけ設ければ貯湯タンク10の水を全て排水することができ、水抜き作業を簡単に行うことができ、従来型の貯湯式電気温水器に比べて貯湯式電気温水器の使い勝手を格段に向上させることができる。   In addition, it is necessary to clean the scale in the hot water storage tank by draining about once every three months, and it is necessary to drain the water by freezing at any time when there is freezing. Therefore, in the conventional hot water storage type electric water heater in which the flow path is formed along a substantially vertical surface in the installed state, a large number of drain plugs provided for each of the downstream flow path and the upward flow path are provided for each of the above draining operations. It is very difficult to drain the water. Also, if you forget to tighten the drain plug even at one location after the draining operation is completed, a large amount of water will leak from the hot water storage tank when the hot water storage type electric water heater is restarted. However, in the hot water storage type electric water heater according to the present invention, since the flow path is substantially along the horizontal plane in the installed state, if the drain plug is provided only at one position below the lower surface or the side surface of the hot water storage tank 10, All the water can be drained, the draining operation can be easily performed, and the usability of the hot water storage type electric water heater can be significantly improved as compared with the conventional hot water storage type electric water heater.

なお、貯湯タンク10及び仕切り壁部4,5は、樹脂であっても金属であっても良い。貯湯タンク10及び仕切り壁部4,5を樹脂で構成した場合、一体成型が可能で製造性が良い。なお、この場合にヒータhを嵌め込み保持する為のラッチ係合部を併せて成型するのが良い。貯湯タンク10及び仕切り壁部4,5に用いられる樹脂材料としては、例えば、PPS(polyphenylenesulfide)樹脂が挙げられる。   The hot water storage tank 10 and the partition walls 4 and 5 may be made of resin or metal. When the hot water storage tank 10 and the partition wall portions 4 and 5 are made of resin, they can be integrally molded and have good productivity. In this case, it is preferable to mold together a latch engaging portion for fitting and holding the heater h. Examples of the resin material used for the hot water storage tank 10 and the partition walls 4 and 5 include PPS (polyphenylenesulfide) resin.

一方、貯湯タンク10及び仕切り壁部4,5を金属で構成した場合、熱伝導率が高いため沸き上げ効率が向上する。また、この場合に金属製の仕切り壁部5に発熱体を内蔵することでヒータhを簡単に構成することができる。なお、貯湯タンク10及び仕切り壁部4,5に用いられる金属材料としては、ステンレス鋼や銅などが挙げられる。   On the other hand, when the hot water storage tank 10 and the partition wall parts 4 and 5 are comprised with a metal, since heat conductivity is high, boiling efficiency improves. In this case, the heater h can be easily configured by incorporating a heating element in the metal partition wall 5. In addition, as a metal material used for the hot water storage tank 10 and the partition wall parts 4 and 5, stainless steel, copper, etc. are mentioned.

上述したようにヒータhの4つの縁部のうち3つの縁部は、それぞれ平面部10b,10e,10fに接している(図1参照)。そして、ヒータhは平面部10aには接しておらず、ヒータhと平面部10aとの間に隙間が生じている。このようにヒータhがその3つの縁部で金属製の貯湯タンク10と接触することで、良好な熱伝導性を介して湯を均一に沸き上げるいわゆる沸き上げ効率を向上させる。   As described above, three of the four edges of the heater h are in contact with the flat portions 10b, 10e, and 10f, respectively (see FIG. 1). The heater h is not in contact with the flat portion 10a, and a gap is generated between the heater h and the flat portion 10a. In this way, the heater h comes into contact with the metal hot water storage tank 10 at its three edges, thereby improving the so-called boiling efficiency of boiling the hot water uniformly through good thermal conductivity.

続いて、上述の実施形態の各変形例について説明する。なお、上述の実施形態と同等の構成については対応する符号を付して詳細な説明を省略する。   Then, each modification of the above-mentioned embodiment is demonstrated. In addition, about the structure equivalent to the above-mentioned embodiment, a corresponding code | symbol is attached | subjected and detailed description is abbreviate | omitted.

最初に、上述の実施形態の第1変形例について説明する。図5は、この第1変形例にかかる貯湯式電気温水器の貯湯タンク21を模式的に示す斜視図である。   Initially, the 1st modification of the above-mentioned embodiment is demonstrated. FIG. 5 is a perspective view schematically showing a hot water storage tank 21 of the hot water storage type electric water heater according to the first modification.

本変形例ではヒータhを入水部11の近傍に設けている。具体的には入水部11からの水が最初に入水される流路(第1レーン)の壁部に相当する位置にヒータhを設けている。   In this modification, the heater h is provided in the vicinity of the water inlet 11. Specifically, a heater h is provided at a position corresponding to a wall portion of a flow path (first lane) through which water from the water inlet 11 is first introduced.

入水部11の近傍にヒータhを設けることで、貯湯部6への入水後に入水部近傍に貯まった比較的低温の水を直接加熱することができ、沸き上げ効率を向上させる。   By providing the heater h in the vicinity of the water inlet 11, relatively low-temperature water stored in the vicinity of the water inlet after water has entered the hot water storage 6 can be directly heated, and the boiling efficiency is improved.

続いて、上述の実施形態の第2変形例について説明する。図6はこの第2変形例にかかる貯湯式電気温水器における貯湯タンク31を模式的に示した斜視図である。   Then, the 2nd modification of the above-mentioned embodiment is demonstrated. FIG. 6 is a perspective view schematically showing a hot water storage tank 31 in the hot water storage type electric water heater according to the second modification.

本変形例では入水部11と出湯部12を結ぶ方向に複数のヒータhを分散配置している。具体的には3つのヒータhを入水部11の近傍、出湯部12の近傍、貯湯タンク31の長手方向(入水部11と出湯部12とを結ぶ方向)の略中央にそれぞれ設けている。   In this modification, a plurality of heaters h are dispersedly arranged in the direction connecting the water inlet 11 and the hot water outlet 12. Specifically, three heaters h are provided in the vicinity of the water inlet 11, the vicinity of the hot water outlet 12, and the approximate center of the hot water storage tank 31 in the longitudinal direction (the direction connecting the water inlet 11 and the hot water outlet 12).

入水部11の近傍に設けたヒータhは、例えば入水部11から数えて1番目のレーンの壁部に相当する位置に設けられている。一方、出湯部12の近傍及び貯湯タンク31の長手方向の略中央に設けたヒータhは、例えば出湯部12から数えて2番目のレーンと6番目のレーンの壁部に相当する位置にそれぞれ設けられている。   The heater h provided in the vicinity of the water inlet 11 is provided, for example, at a position corresponding to the wall portion of the first lane counted from the water inlet 11. On the other hand, the heaters h provided in the vicinity of the hot water supply section 12 and in the approximate center in the longitudinal direction of the hot water storage tank 31 are provided at positions corresponding to the wall portions of the second lane and the sixth lane, for example. It has been.

複数のヒータhをこのように分散配置することで、貯湯部全体の水が均等に沸き上がり、沸き上げ効率の更なる向上を図ることができる。また、複数のヒータhを分散配置した場合、各ヒータhの発熱量も分散させることができる。即ち、例えば1つのヒータで貯湯部全体を所望の温度に加熱する場合のヒータの発熱量に対して、3つのヒータhの発熱量をそれぞれ例えば1/3にすることができる。これによって、貯湯部6の局所的な過度の昇温が抑えられ、貯湯タンク31の局所的な熱応力の発生を阻止する共に各部品の耐熱性に余裕を持たせることができ、貯湯式電気温水器の安全性や信頼性を確保する。   By disposing the plurality of heaters h in this manner, the water in the entire hot water storage unit is evenly boiled, and the boiling efficiency can be further improved. Further, when a plurality of heaters h are arranged in a distributed manner, the amount of heat generated by each heater h can also be dispersed. That is, for example, the heat generation amount of the three heaters h can be reduced to, for example, 1/3 with respect to the heat generation amount of the heater when the entire hot water storage unit is heated to a desired temperature with one heater, for example. As a result, excessive local temperature rise in the hot water storage unit 6 can be suppressed, generation of local thermal stress in the hot water storage tank 31 can be prevented, and the heat resistance of each component can be provided. Ensure the safety and reliability of the water heater.

また、複数のヒータhを分散配置した場合、貯湯部内における各ヒータhの近傍に各ヒータhの近傍の温度を測定する温度センサ(図示せず)を設け、各温度センサの温度測定結果から例えば所望の温度より低い測定温度であったセンサ近傍のヒータhのみを動作させるような制御を行えば、無駄な電力消費を抑えて効率の良い加熱や保温を行うことができる。   In addition, when a plurality of heaters h are arranged in a distributed manner, a temperature sensor (not shown) that measures the temperature in the vicinity of each heater h is provided in the vicinity of each heater h in the hot water storage section. If control is performed so that only the heater h in the vicinity of the sensor whose measurement temperature is lower than the desired temperature is operated, it is possible to suppress wasteful power consumption and perform efficient heating and heat insulation.

続いて、上述の実施形態の第3変形例について説明する。図7は、この第3変形例にかかる貯湯タンク10の内部を模式的に示す平面図である。   Then, the 3rd modification of the above-mentioned embodiment is demonstrated. FIG. 7 is a plan view schematically showing the inside of the hot water storage tank 10 according to the third modification.

この変形例にかかる貯湯式電気温水器の仕切り壁部34,35及びヒータhは、図7に示すように、貯湯タンク10の長手向に沿って延在している。即ち、貯湯タンク10における長手方向の両端の平面部10c,10dの一方の平面部10cから仕切り壁部34が他方の平面部10dに向けて延在し、仕切り壁部34と他方の平面部10dとの間には隙間が生じている。また、仕切り壁部35は、仕切り壁部34が接する一方の平面部10cに対向する他方の平面部10dから一方の平面部10cに向けて延在し、仕切り壁部35とその一方の平面部10cとの間には隙間が生じている。そして、これら仕切り壁部34,35が貯湯タンク10の短手方向に交互に配設されている。   As shown in FIG. 7, the partition walls 34 and 35 and the heater h of the hot water storage type electric water heater according to this modification extend along the longitudinal direction of the hot water storage tank 10. That is, the partition wall portion 34 extends from one flat surface portion 10c of the flat surface portions 10c, 10d at both ends in the longitudinal direction of the hot water storage tank 10 toward the other flat surface portion 10d, and the partition wall portion 34 and the other flat surface portion 10d. There is a gap between them. Further, the partition wall portion 35 extends from the other flat surface portion 10d facing the one flat surface portion 10c with which the partition wall portion 34 comes into contact toward the one flat surface portion 10c, and the partition wall portion 35 and the one flat surface portion thereof. There is a gap between 10c. And these partition wall parts 34 and 35 are alternately arrange | positioned in the transversal direction of the hot water storage tank 10. FIG.

ヒータhは貯湯タンク10の短手方向の略中央に配設され、例えば入水部11から数えて7番目のレーンの壁部に相当する位置に設けられている。貯湯タンク10がこのような構成であっても、上述した実施形態及びその各変形例と同様の作用効果を発揮する。   The heater h is disposed substantially in the center of the hot water storage tank 10 in the short direction, and is provided, for example, at a position corresponding to the wall portion of the seventh lane counted from the water inlet 11. Even if the hot water storage tank 10 has such a configuration, the same operational effects as those of the above-described embodiment and its modifications are exhibited.

続いて、本実施形態の第4変形例について説明する。図8はこの第4変形例にかかる貯湯タンク10の分解斜視図である。   Then, the 4th modification of this embodiment is demonstrated. FIG. 8 is an exploded perspective view of the hot water storage tank 10 according to the fourth modification.

本変形例においては、ヒータhは、貯湯式電気温水器の設置状態で貯湯タンク10の外側に直接接するように設けられている。より具体的には、板状のヒータhは、貯湯部6の厚さ方向に対して垂直な側面、即ち貯湯式電気温水器の設置状態で重力の作用方向で見て下面となる貯湯タンク10の平面部10fに密着固定されている。この場合、例えばハンダや熱伝導性の良い接着剤などにより板状のヒータhを金属製の貯湯タンク10の平面部10fに接着することで、ヒータhの熱を貯湯タンク10に効率良く伝えることができる。そして、貯湯タンク内に設けられた仕切り壁部4が熱伝導フィンとしての役割を果たし、タンク内の水を高い効率で均一に沸き上げることができる。また、ヒータhが貯湯タンク10の下面に設置されているので、ヒータhから上方に向かう熱流を貯湯タンク10に効率的に伝えることができ、湯を効率良く沸き上げることができる。   In this modification, the heater h is provided so as to be in direct contact with the outside of the hot water storage tank 10 in a state where the hot water storage type electric water heater is installed. More specifically, the plate-shaped heater h is a hot water storage tank 10 which is a side surface perpendicular to the thickness direction of the hot water storage section 6, that is, a lower surface when viewed in the direction of gravity when the hot water storage type electric water heater is installed. The flat surface portion 10f is closely fixed. In this case, the heat of the heater h can be efficiently transmitted to the hot water storage tank 10 by bonding the plate heater h to the flat portion 10f of the metal hot water storage tank 10 with, for example, solder or an adhesive having good thermal conductivity. Can do. And the partition wall part 4 provided in the hot water storage tank plays the role as a heat conduction fin, and can boil the water in a tank uniformly with high efficiency. Moreover, since the heater h is installed in the lower surface of the hot water storage tank 10, the heat flow which goes upward from the heater h can be efficiently transmitted to the hot water storage tank 10, and hot water can be efficiently boiled up.

なお、この第4変形例のようにヒータhを貯湯タンク10の下面をなす平面部10fに全体的に密着固定する代わりに、ヒータhを例えば入水部11の近傍であって貯湯タンク10の側面に密着固定させたり、平面部10fの複数の部分に分けて密着固定させたりしても良い。   Instead of fixing the heater h to the flat surface portion 10f that forms the lower surface of the hot water storage tank 10 as in the fourth modification, the heater h is, for example, in the vicinity of the water inlet 11 and the side surface of the hot water storage tank 10. It may be fixed in close contact with each other, or may be fixed in close contact with a plurality of portions of the plane portion 10f.

続いて、本実施形態の第5変形例について説明する。図9は、この第5変形例を模式的に示す斜視図である。第5変形例では、貯湯タンク内の流路が略水平面に沿うように貯湯式電気温水器を設置した状態で、重力の作用方向で見て側面となる平面10bの下方に水抜き部25aが設けられている。この場合であっても貯湯タンク10の下面をなす平面10fに水抜き部25を設けた上述の実施形態及びその変形例と同様に一箇所の水抜き栓23を開くことで、貯湯タンク内の水を全て排水することができ、排水性に関する本発明の上述した作用効果を十分発揮し得る。なお、この水抜き部25を貯湯タンク10の側面をなす平面部10c,10dに設置する場合の設置位置は、貯湯式電気温水器の設置状態で重力の作用方向で見て平面部10c,10dの下縁部近傍である。このような配置構成によっても貯湯タンク内の水抜きを完全に行なうことができる。   Then, the 5th modification of this embodiment is demonstrated. FIG. 9 is a perspective view schematically showing the fifth modification. In the fifth modified example, in a state where the hot water storage type electric water heater is installed so that the flow path in the hot water storage tank is substantially along the horizontal plane, the drainage portion 25a is provided below the flat surface 10b which is the side as viewed in the direction of gravity. Is provided. Even in this case, by opening the drain plug 23 in the same manner as in the above-described embodiment in which the drainage portion 25 is provided on the flat surface 10f forming the lower surface of the hot water storage tank 10 and its modified example, All the water can be drained, and the above-described operational effects of the present invention relating to drainage can be sufficiently exhibited. In addition, the installation position in the case of installing this drain part 25 in the plane parts 10c and 10d which form the side surface of the hot water storage tank 10 is the plane parts 10c and 10d when viewed in the direction of gravity when the hot water storage type electric water heater is installed. Near the lower edge of Even with such an arrangement, the water in the hot water storage tank can be completely drained.

続いて、本実施形態の更なる変形例について説明する。以下に説明する第6変形例乃至第8変形例は上述の実施形態及びその各変形例に用いた板状のヒータhの代わりにいわゆる投げ込み式ヒータと呼ばれるパイプ状のヒータhを備えた変形例である。このヒータhは、各変形例に示すように、様々な形状に折り曲げられ、パイプ内にニクロム線等の発熱体を内蔵したタイプである。なお、ヒータh以外は上述した実施形態と同等の構成を有するので、対応する符号を付して詳細な説明を省略する。   Then, the further modification of this embodiment is demonstrated. The sixth to eighth modifications described below are modifications in which a pipe-like heater h called a so-called throw-in heater is provided instead of the plate-like heater h used in the above-described embodiment and each of the modifications. It is. As shown in each modification, the heater h is a type that is bent into various shapes and has a heating element such as a nichrome wire built in a pipe. In addition, since it has the structure equivalent to embodiment mentioned above other than the heater h, a corresponding code | symbol is attached | subjected and detailed description is abbreviate | omitted.

このような投げ込み式のヒータhを用いるメリットは少なくとも発熱部を貯湯タンク10の底面近傍(貯湯タンク10の高さの1/2より下)に配置できることにある。これにより、貯湯タンク10の底面側の方から加熱され、死に水がより少なくなり沸き上げ性が向上する。なお、仕切り壁兼用の板状ヒータの場合は貯湯タンク内に貯まった水を下から上まで幅広く加熱できるので、このような投げ込み式のヒータhよりは有利であるが、投げ込み式のヒータhの方がコスト的に安価でありかつ貯湯タンク内でのヒータ設置場所を容易に変更することができるので、その利用価値は大きい。   The merit of using such a throw-in heater h is that at least the heat generating portion can be arranged near the bottom surface of the hot water storage tank 10 (below 1/2 the height of the hot water storage tank 10). Thereby, it heats from the direction of the bottom face side of the hot water storage tank 10, and there is less water dead and the boiling property improves. In the case of a plate heater that also serves as a partition wall, the water stored in the hot water storage tank can be heated widely from the bottom to the top, which is advantageous over such a throw-in type heater h. This is cheaper in cost and can easily change the heater installation location in the hot water storage tank, so its utility value is great.

図10に示す第6変形例は、貯湯タンク10の長手方向略中央部よりも若干入水部側に配置された仕切り壁部4を跨いだ状態でヒータhが配置された変形例である。   The sixth modified example shown in FIG. 10 is a modified example in which the heater h is arranged in a state of straddling the partition wall 4 arranged slightly closer to the water inlet than the central portion in the longitudinal direction of the hot water storage tank 10.

また、図11に示す第7変形例は、多数の仕切り壁部4,5を貫通した状態で貯湯タンク10の長手方向一方の端部から他方の端部近傍までヒータhが延在すると共にこの他方の端部近郊でヒータhが折り返して再び長手方向一方の端部まで仕切り壁部4,5を貫通した変形例である。   Further, in the seventh modification shown in FIG. 11, the heater h extends from one end in the longitudinal direction of the hot water storage tank 10 to the vicinity of the other end in a state of passing through the many partition walls 4 and 5. This is a modification in which the heater h is folded back in the vicinity of the other end portion and penetrates the partition wall portions 4 and 5 to one end portion in the longitudinal direction again.

また、図12に示す第8変形例は、入水部側の平面部10cとこれに隣接する仕切り壁部4との間の空間にヒータhを配置した変形例である。   Further, the eighth modification shown in FIG. 12 is a modification in which the heater h is arranged in the space between the flat surface portion 10c on the water inlet side and the partition wall portion 4 adjacent thereto.

これらの何れの変形例の構成であっても、本発明の作用の一つである湯の沸き上げ効率の向上を達成することが可能である。   With any of these modifications, it is possible to achieve an improvement in the boiling efficiency of hot water, which is one of the functions of the present invention.

なお、図12に示す第8変形例においては、入水部側の平面部10cとこれに隣接する仕切り壁部4との間にヒータhを配置したが、この代わりに出湯部側の平面部10dとこれに隣接する仕切り壁部4との間にヒータhを配置しても良い。この場合、出湯直前に湯を加熱するので、加熱後に出湯するまでの間に湯がさめることなく湯の沸き上げ性を低下させることもない。   In addition, in the 8th modification shown in FIG. 12, although the heater h was arrange | positioned between the plane part 10c by the side of a water intake, and the partition wall part 4 adjacent to this, the plane part 10d by the side of a tapping part is replaced with this. And a heater h may be arranged between the partition wall 4 adjacent thereto. In this case, since the hot water is heated immediately before the hot water, the hot water is not reduced before the hot water is discharged after the heating, and the boiling property of the hot water is not lowered.

なお、図10乃至図12でヒータhの様々な設置箇所等の説明をしたが、基本的には貯湯タンクの入水部側から冷水が溜まる場合が多いので、入水部側にヒータhを配置したほうが冷水を効率的に加熱でき、好ましいと言える。しかしながら、本実施形態のような仕切り板が特別な配置構造で備わった貯湯タンクの場合、蛇行流路によって貯湯タンク内は繋がっており、自然対流を塞き止めることがないので、ヒータhの設置場所は入水側近傍以外の場所に設置しても貯湯タンク内の湯を均一に沸き上げることができる。   Although various installation locations of the heater h have been described with reference to FIG. 10 to FIG. 12, since the cold water often accumulates from the water inlet side of the hot water storage tank, the heater h is disposed on the water inlet side. It can be said that it is more preferable because it can efficiently heat cold water. However, in the case of a hot water storage tank provided with a special arrangement structure of the partition plate as in the present embodiment, the hot water storage tank is connected by a meandering flow path and does not block natural convection. Even if the place is installed in a place other than the vicinity of the inflow side, the hot water in the hot water storage tank can be uniformly heated.

また、図13乃至図16にそれぞれ示す第9変形例乃至第12変形例は、上述の実施形態及びその変形例の水抜きの形態を更に工夫した構成を有している。なお、その他の構成については上述した実施形態と同等のため、対応する符号を付して詳細な説明を省略する。   Further, the ninth to twelfth modifications shown in FIGS. 13 to 16 have a configuration in which the above-described embodiment and the form of draining in the modification are further devised. Since other configurations are the same as those of the above-described embodiment, the corresponding reference numerals are assigned and detailed description is omitted.

図13に示す第9変形例は、平面部10fの上面に流路底面10xを備えている。そして、流路底面10xは、貯湯式電気温水器の設置状態で水抜き部25に向かって重力の作用方向で見て徐々に下側に向かうテーパ面をその底面全体がなしている。これによって、水抜き時に水抜き部25から貯湯タンク内の湯や水を効率良く排水することができる。   The ninth modification shown in FIG. 13 includes a flow path bottom surface 10x on the upper surface of the flat surface portion 10f. The channel bottom surface 10x forms a taper surface that gradually goes downward as viewed in the direction of gravity acting toward the drainage portion 25 in the installed state of the hot water storage type electric water heater. Thereby, hot water and water in the hot water storage tank can be efficiently drained from the drainage portion 25 when draining water.

また、図14に示す第10変形例は、図13に示す第9変形例とは異なり、平面部10fの上面に貯湯式電気温水器の設置状態で貯湯タンク10の長手方向略中央部に備わった水抜き部25に向かってそれぞれ下向きに傾斜する一組のテーパ面状の流路底面10yを備えている。このような構成であっても、図13に示す第9変形例と同様に、水抜き時に水抜き部25から貯湯タンク内の湯や水を効率良く排水することができる。   14 differs from the ninth modification shown in FIG. 13 in that a hot water storage type electric water heater is installed on the upper surface of the flat surface portion 10f at a substantially central portion in the longitudinal direction of the hot water storage tank 10. In the tenth modification shown in FIG. A pair of tapered channel bottom surfaces 10y each inclined downward toward the drainage portion 25 are provided. Even with such a configuration, hot water and water in the hot water storage tank can be efficiently drained from the water draining portion 25 when draining, as in the ninth modification shown in FIG.

このように貯湯タンク内に傾斜した流路底面を備えることで貯湯式電気温水器の設置状態で重力の作用方向で見て低い側(下側)の底面に湯や水が溜まり易いことを利用して水抜き部25の排水性を向上させる種々の変形例が考えられる。   In this way, by using the inclined channel bottom in the hot water storage tank, hot water and water are likely to accumulate on the bottom side (lower side) when viewed in the direction of gravity when the hot water storage type electric water heater is installed. Various modifications that improve the drainage of the drainage portion 25 can be considered.

一方、図15に示す第11変形例は、貯湯タンク10の長手方向略中央部において幅方向全体に亘って水抜き溝10zを備え、この水抜き溝10zの幅方向一側に偏倚した位置に水抜き部25を備えている。このような構成によっても、貯湯タンク内の湯や水を水抜き溝内に一旦溜め込み、この水抜き溝10z及び水抜き部25を介して貯湯タンク内の湯や水を効率良く排水することができる。なお、この場合の水抜き溝10zの貯湯タンク長手方向における形成位置や水抜き部25の貯湯タンク幅方向における形成位置はこの変形例に限定されるものでないことは言うまでもない。   On the other hand, the eleventh modification shown in FIG. 15 is provided with a water draining groove 10z over the entire width direction at a substantially central portion in the longitudinal direction of the hot water storage tank 10, and at a position biased to one side in the width direction of the water draining groove 10z. A drainage portion 25 is provided. Even with such a configuration, the hot water and water in the hot water storage tank can be temporarily stored in the drainage groove, and the hot water and water in the hot water storage tank can be efficiently drained through the drainage groove 10z and the drainage portion 25. it can. In addition, it cannot be overemphasized that the formation position in the hot water storage tank longitudinal direction of the water draining groove 10z in this case and the formation position in the hot water storage tank width direction of the water draining part 25 are not limited to this modification.

また、図16に示す第12変形例は、パイプ状をなす入水部11の底部に水抜き部25を直接配置した構成を有している。入水部11は、貯湯式電気温水器の設置状態で重力の作用方向で見て一般的に貯湯タンク10の平面部10cの下側に備わっているので、このような位置に水抜き部25を有していても、貯湯タンク内の湯や水を効率良く排水することができる。また、このような構成を有することで、入水部11と水抜き部25を一体化(兼用)できるので、部品点数を削減し、組み付け性の容易化やコストの低減に貢献することができる。   Moreover, the 12th modification shown in FIG. 16 has the structure which has arrange | positioned the drain part 25 directly in the bottom part of the water-injection part 11 which makes | forms a pipe shape. The water intake section 11 is generally provided below the flat surface portion 10c of the hot water storage tank 10 when viewed from the direction of gravity when the hot water storage type electric water heater is installed. Even if it has, the hot water and water in a hot water storage tank can be drained efficiently. Moreover, by having such a structure, since the water intake part 11 and the water drain part 25 can be integrated (combined), a number of parts can be reduced and it can contribute to the ease of assembly | attachment and reduction of cost.

続いて、本実施形態及びその第1、第2、第4、第5変形例にかかる貯湯式電気温水器(以下、「本実施例」とする)と貯湯タンク内に仕切り壁部を有さない貯湯式電気温水器(以下、「比較例」とする)を用いて湯の押し出し性能の比較評価試験を行ったので、この比較評価試験の結果について説明する。   Subsequently, a hot water storage type electric water heater (hereinafter referred to as “this embodiment”) and a hot water storage tank according to the present embodiment and the first, second, fourth, and fifth modifications thereof have a partition wall portion. A comparative evaluation test of hot water extrusion performance was conducted using a non-hot water storage type electric water heater (hereinafter referred to as “comparative example”), and the results of this comparative evaluation test will be described.

図17は、本実施例と比較例を厚さ60mm、長手方向長さ250mm、短手方向長さ200mmの扁平直方体状を有する貯湯タンク内の3リットルの水を85℃まで沸き上げた後、入水部から1.43リットル/分で給水したときの出湯部から出湯された湯の出湯温度の時間変化を表すグラフ図である。なお、図17において横軸は時間(秒)を表わし、縦軸は出湯部からの出湯温度(℃)を表している。   17, after boiling 3 liters of water in a hot water storage tank having a flat rectangular parallelepiped shape with a thickness of 60 mm, a length in the longitudinal direction of 250 mm, and a length in the short direction of 200 mm up to 85 ° C. It is a graph showing the time change of the hot water temperature of the hot water discharged from the hot water portion when the water is supplied from the incoming portion at 1.43 liters / minute. In FIG. 17, the horizontal axis represents time (seconds), and the vertical axis represents the temperature of discharged hot water (° C.) from the hot water outlet.

この図17の評価試験結果から明らかなように、貯湯式電気温水器の設置状態で貯湯タンク内の流路が略水平面に沿って形成されるように貯湯タンク内に仕切り壁部を設けた本実施例の場合、約90秒間に亘って85℃の出湯温度を保つことが分かった。これに対して貯湯タンク内に仕切り壁部を設けなかった比較例の場合、30〜35秒程度しか85℃の出湯時間が続かず、本実施例よりも85℃の湯の出湯時間が極端に短いことが分かった。   As is apparent from the evaluation test results in FIG. 17, the partition wall portion is provided in the hot water storage tank so that the flow path in the hot water storage tank is formed along a substantially horizontal plane in the installed state of the hot water storage type electric water heater. In the case of the Example, it turned out that 85 degreeC tapping temperature is maintained over about 90 second. On the other hand, in the case of the comparative example in which the partition wall portion is not provided in the hot water storage tank, the 85 ° C. hot water discharge time lasts only for about 30 to 35 seconds, and the 85 ° C. hot water discharge time is extremely shorter than this embodiment. I understood that.

この評価試験により、本実施例のように貯湯式電気温水器の設置状態で貯湯タンク内の流路が略水平方向に沿うような仕切り壁部を設けた貯湯式電気温水器の優位性をこのような仕切り壁部を有さない電気温水器に対して十分に確認できた。   As a result of this evaluation test, the superiority of the hot water storage type electric water heater provided with a partition wall portion in which the flow path in the hot water storage tank follows the substantially horizontal direction in the installed state of the hot water storage type electric water heater as in this embodiment is shown. It was able to confirm enough with respect to the electric water heater which does not have such a partition wall part.

以上説明したように、本発明にかかる貯湯式電気温水器は、仕切り壁部により貯湯タンク内に連続した狭い流路を形成し、かつこの流路が貯湯式電気温水器の設置状態で略水平面に沿って蛇行するようになっているので、設置状態で流路が略鉛直面に沿って蛇行する従来型の貯湯式電気温水器のように上から下に向かう流路において湯水の密度差によって水が湯より早くこの流路を降下するようなことが生じず、これにより湯に水が混合することが抑えられ、湯の押し出し性が向上する。   As described above, the hot water storage type electric water heater according to the present invention forms a continuous narrow channel in the hot water storage tank by the partition wall portion, and this channel is substantially horizontal in the installed state of the hot water storage type electric water heater. Because of the density difference of hot water in the flow path from the top to the bottom like the conventional hot water storage type electric water heater in which the flow path meanders along a substantially vertical surface in the installed state. It does not occur that the water descends the flow path earlier than the hot water, thereby preventing the water from mixing with the hot water and improving the pushability of the hot water.

また、上下方向の高さを低くして、水平方向の代表長さ(水平方向断面が長方形状の場合の辺長や楕円形状の場合の径長など)に比べて高さが低いような扁平にした横長の貯湯タンクを有した貯湯式電気温水器を設置する場合、流路が鉛直面に沿って蛇行する従来型の電気温水器のように全体的な流水方向に対して垂直な方向のみの仕切り壁部を設けたものより十分に流路の断面積を小さくでき、貯湯タンクの構造を極端に複雑化させずに済み、貯湯式電気温水器自体のコストを抑えかつ組付け性を向上させることができる。   In addition, the height in the vertical direction is reduced so that the height is lower than the representative length in the horizontal direction (such as the side length when the horizontal cross section is rectangular or the diameter length when the cross section is elliptical). When installing a hot water storage type electric water heater with a horizontally long hot water storage tank, only the direction perpendicular to the overall water flow direction like a conventional electric water heater whose flow path meanders along a vertical surface The cross-sectional area of the flow path can be made sufficiently smaller than the one provided with the partition wall, and the structure of the hot water storage tank can be kept extremely complex, reducing the cost of the hot water type electric water heater itself and improving the assemblability. Can be made.

また、貯湯タンク内の流路が略鉛直面に沿って蛇行せず略水平面に沿って蛇行するようになっているので、貯湯タンクの下面又は側面下方に水抜き部を配置することで、貯湯式電気温水器を設置したままの姿勢で水抜き部を開放するだけで貯湯タンクの入水部と出湯部に連結された配管を外すことなく貯湯タンク内の水を全て排水でき、メンテナンス性が向上する。   Further, the flow path in the hot water storage tank does not meander along the substantially vertical plane but meanders along the substantially horizontal plane. The water drainage tank can be drained without removing the pipes connected to the water inlet and outlet of the hot water tank by simply opening the drainage with the electric water heater installed, improving maintainability To do.

具体的には、貯湯式電気温水器は長期間使用しているとタンク内が水垢などで汚れることがあるので、貯湯タンクの水を定期的に抜き、水がきれいになるまで給水と排水を繰り返して清掃する必要がある。貯湯タンク内が凍結する畏れがあるときもタンク内の水を抜く場合がある。   Specifically, if the hot water storage type electric water heater is used for a long period of time, the inside of the tank may become dirty with scale, etc., so the water in the hot water storage tank is periodically drained and water supply and drainage are repeated until the water is clean. Need to be cleaned. Even when the hot water tank is frozen, the water in the tank may be drained.

そして、水抜きによる貯湯タンク内の水垢の水抜きによる掃除は三ヶ月に一回程度行う必要があり、凍結による水抜きは凍結の畏れがあるときに随時行う必要がある。そのため、設置状態で流路が略鉛直面に沿って形成される従来型の貯湯式電気温水器では、下り流路や昇り流路毎に設けた多数の水抜き栓を上述した水抜き作業毎に全て開放しなければならず、水抜き作業が極めてやり難くなる。しかしながら、本発明による貯湯式電気温水器は、設置状態で流路が略水平面に沿うようになっているので、水抜き栓を貯湯タンクの下面又は側面下方の一箇所だけ設ければ良くなり、水抜き作業を簡単に行うことができ、貯湯式電気温水器の使い勝手を格段に向上させることができる。   And, it is necessary to perform cleaning by draining the scale in the hot water storage tank by draining about once every three months, and draining by freezing should be performed at any time when there is freezing. Therefore, in the conventional hot water storage type electric water heater in which the flow path is formed along a substantially vertical surface in the installed state, a large number of drain plugs provided for each of the downstream flow path and the upward flow path are provided for each of the above draining operations. It is very difficult to drain the water. However, in the hot water storage type electric water heater according to the present invention, since the flow path is substantially along the horizontal plane in the installed state, it is only necessary to provide a drain plug at one place below the lower surface or side surface of the hot water storage tank, The water draining operation can be easily performed, and the usability of the hot water storage type electric water heater can be greatly improved.

なお、水抜きは手動で行なっても、自動で行なっても良い。自動で行なう場合は、本実施形態及びその各種変形例に記載された水抜きの場所において重力を利用して水抜きができるため、排水路に直結した構造とするだけで水抜き作業を手軽にでき、閉め忘れの水抜きバルブの閉め忘れ防止が可能となり信頼性が増す。   In addition, draining may be performed manually or automatically. When performing automatically, water can be drained by using gravity at the drainage site described in this embodiment and its various modifications, so drainage work can be done easily by simply connecting to the drainage channel. This makes it possible to prevent the forgetting to close the drain valve that has been forgotten to close, thus increasing reliability.

本発明の一実施形態にかかる貯湯式電気温水器の貯湯タンクを模式的に示す斜視図である。1 is a perspective view schematically showing a hot water storage tank of a hot water storage type electric water heater according to an embodiment of the present invention. 図1に示した貯湯タンクの内部を模式的に示す平面図である。It is a top view which shows typically the inside of the hot water storage tank shown in FIG. 図1に示した貯湯タンクの分解斜視図である。It is a disassembled perspective view of the hot water storage tank shown in FIG. 図1に示した一方の仕切り壁部を貯湯タンクの長手方向の入水部側から見た模式図(図4(a))と、図1に示した他方の仕切り壁部を貯湯タンクの長手方向入水部側から見た模式図(図4(b))である。The schematic view (FIG. 4 (a)) which looked at the one partition wall part shown in FIG. 1 from the water inlet part side of the longitudinal direction of a hot water storage tank, and the longitudinal direction of the hot water storage tank of the other partition wall part shown in FIG. It is the schematic diagram (FIG.4 (b)) seen from the water intake part side. 図1に示した貯湯式電気温水器の第1変形例を模式的に示す斜視図である。It is a perspective view which shows typically the 1st modification of the hot water storage type electric water heater shown in FIG. 図1に示した貯湯式電気温水器の第2変形例を模式的に示す斜視図である。It is a perspective view which shows typically the 2nd modification of the hot water storage type electric water heater shown in FIG. 図1に示した貯湯式電気温水器の第3変形例を模式的に示す斜視図である。It is a perspective view which shows typically the 3rd modification of the hot water storage type electric water heater shown in FIG. 図1に示した貯湯式電気温水器の第4変形例を分解した状態で示す斜視図である。It is a perspective view shown in the state which decomposed | disassembled the 4th modification of the hot water storage type electric water heater shown in FIG. 図1に示した貯湯式電気温水器の第5変形例を模式的に示す斜視図である。It is a perspective view which shows typically the 5th modification of the hot water storage type electric water heater shown in FIG. 図1に示した貯湯式電気温水器の第6変形例を模式的に示した斜視図である。It is the perspective view which showed typically the 6th modification of the hot water storage type electric water heater shown in FIG. 図1に示した貯湯式電気温水器の第7変形例を模式的に示した斜視図である。It is the perspective view which showed typically the 7th modification of the hot water storage type electric water heater shown in FIG. 図1に示した貯湯式電気温水器の第8変形例を模式的に示した斜視図である。It is the perspective view which showed typically the 8th modification of the hot water storage type electric water heater shown in FIG. 図1に示した貯湯式電気温水器の第9変形例を模式的に示した斜視図である。It is the perspective view which showed typically the 9th modification of the hot water storage type electric water heater shown in FIG. 図1に示した貯湯式電気温水器の第10変形例を模式的に示した斜視図である。It is the perspective view which showed typically the 10th modification of the hot water storage type electric water heater shown in FIG. 図1に示した貯湯式電気温水器の第11変形例を模式的に示した斜視図である。It is the perspective view which showed typically the 11th modification of the hot water storage type electric water heater shown in FIG. 図1に示した貯湯式電気温水器の第12変形例を模式的に示した斜視図である。It is the perspective view which showed typically the 12th modification of the hot water storage type electric water heater shown in FIG. 本発明に関する評価試験において本実施例と比較例を評価した試験結果を示すグラフ図である。It is a graph which shows the test result which evaluated the present Example and the comparative example in the evaluation test regarding this invention.

符号の説明Explanation of symbols

4,5 仕切り壁部
6 貯湯部
10 貯湯タンク
10a〜10f 平面部
10u (上側)分割体
10s (下側)分割体
10x,10y 流路底面
10z 水抜き溝
11 入水部
12 出湯部
21 貯湯タンク
23 水抜き栓
24 水抜き管
25,25a 水抜き部
31 貯湯タンク
34,35 仕切り壁部
h ヒータ
4,5 Partition wall part 6 Hot water storage part 10 Hot water storage tank 10a to 10f Plane part 10u (Upper side) Divided body 10s (Lower side) Divided body 10x, 10y Channel bottom face 10z Drain groove 11 Water inlet part 12 Hot water part 21 Hot water tank 23 Drain plug 24 Drain pipe 25, 25a Drain part 31 Hot water storage tank 34, 35 Partition wall h Heater

Claims (6)

貯湯タンクを備えた貯湯式電気温水器において、
前記貯湯タンクは、入水部と、出湯部と、前記入水部と出湯部との間に形成された貯湯部と、前記貯湯部内に水又は湯の蛇行流路を形成するための仕切り壁部を有し、
前記貯湯式電気温水器の設置状態において前記蛇行流路が略水平な面に沿って形成されるように前記仕切り壁部が前記貯湯部内に備わり、かつ重力の作用方向で見て貯湯タンクの下面又は側面下方に水抜き部が設けられたことを特徴とする貯湯式電気温水器。
In hot water storage type electric water heater equipped with hot water storage tank,
The hot water storage tank includes a water inlet, a hot water outlet, a hot water reservoir formed between the water inlet and the hot water outlet, and a partition wall portion for forming a meandering channel for water or hot water in the hot water reservoir. Have
The partition wall portion is provided in the hot water storage portion so that the meandering flow path is formed along a substantially horizontal surface in the installed state of the hot water storage type electric water heater, and the lower surface of the hot water storage tank as viewed in the direction of gravity. Alternatively, a hot water storage type electric water heater characterized in that a drainage portion is provided below the side surface.
前記貯湯タンクの内部にヒータを備えるか、又は外側にヒータを直接接するように備えたことを特徴とする、請求項1に記載の貯湯式電気温水器。   The hot water storage type electric water heater according to claim 1, wherein a heater is provided inside the hot water storage tank, or a heater is provided in direct contact with the outside. 前記貯湯タンクの内部にヒータを備え、かつ前記ヒータが前記仕切り壁部を兼ねていることを特徴とする、請求項1に記載の貯湯式電気温水器。   The hot water storage type electric water heater according to claim 1, wherein a heater is provided in the hot water storage tank, and the heater also serves as the partition wall. 前記ヒータが前記貯湯式電気温水器の設置状態で重力の作用方向で見て前記貯湯タンクの少なくとも1/2より下側の面に備わったことを特徴とする、請求項2に記載の貯湯式電気温水器。   3. The hot water storage type according to claim 2, wherein the heater is provided on a surface lower than at least a half of the hot water storage tank as viewed in the direction of gravity when the hot water storage type electric water heater is installed. Electric water heater. 前記ヒータが前記入水部の近傍に備わったことを特徴とする、請求項2乃至請求項4の何れかに記載の貯湯式電気温水器。   The hot water storage type electric water heater according to any one of claims 2 to 4, wherein the heater is provided in the vicinity of the water inlet. 前記ヒータが複数のヒータからなり、各ヒータが前記入水部と出湯部とを結ぶ方向に分散配置されたことを特徴とする、請求項2乃至請求項4の何れかに記載の貯湯式電気温水器。
The hot water storage-type electricity according to any one of claims 2 to 4, wherein the heater is composed of a plurality of heaters, and each heater is dispersedly arranged in a direction connecting the water inlet portion and the hot water outlet portion. Water heater.
JP2006237024A 2006-08-31 2006-08-31 Hot water storage type electric water heater Pending JP2008057898A (en)

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JP2010175207A (en) * 2009-01-30 2010-08-12 Keiko Kondo Electric type liquid heating and feeding device and method
JP2013515944A (en) * 2009-12-23 2013-05-09 フューエルテク スウェーデン アクチエボラグ Accumulator tank with partition wall

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Publication number Priority date Publication date Assignee Title
JP2010175207A (en) * 2009-01-30 2010-08-12 Keiko Kondo Electric type liquid heating and feeding device and method
JP2013515944A (en) * 2009-12-23 2013-05-09 フューエルテク スウェーデン アクチエボラグ Accumulator tank with partition wall

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