JPH05253061A - Electric water boiler - Google Patents
Electric water boilerInfo
- Publication number
- JPH05253061A JPH05253061A JP5098592A JP5098592A JPH05253061A JP H05253061 A JPH05253061 A JP H05253061A JP 5098592 A JP5098592 A JP 5098592A JP 5098592 A JP5098592 A JP 5098592A JP H05253061 A JPH05253061 A JP H05253061A
- Authority
- JP
- Japan
- Prior art keywords
- water
- temperature
- time
- addition
- detected
- 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.)
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Links
Landscapes
- Cookers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は容器内に収容された水を
加熱保温する電気湯沸器に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric water heater for heating and retaining the water contained in a container.
【０００２】[0002]
【従来の技術】近年、電気式の湯沸器においても、手軽
に水を加熱保温できる家庭用品としての要望のみなら
ず、都市部においてはおいしい水に作り変える機能をも
所持したものが求められている。従来おいしい水に作り
変える機能として、水の沸騰を検知した後一定時間沸騰
を持続させた後に湯沸しの完了報知を行ない、その沸騰
時間中に水中のカルキ成分などを除去している。2. Description of the Related Art In recent years, not only is there a demand for electric water heaters as household products that can easily heat and keep water warm, but in urban areas, there is also a demand for those that have the function of making delicious water. ing. As a function of transforming the water into delicious water, the boiling water is detected for a certain period of time and then the boiling water is maintained for a certain period of time, and then the completion of the boiling water is notified, and the chlorine component in the water is removed during the boiling time.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら上記の従
来の構成では、一旦沸騰させた湯を全部使い切らない状
態で新たに水を追加したときは、その追加割合が把握で
きないので、沸騰時に水中のカルキ成分の存在が気にな
らない程度にまで除去しようとすると、全水沸騰未処理
のものと同等の長時間沸騰状態を維持しなければならな
いという問題を有していた。However, in the above-mentioned conventional configuration, when new water is added without completely using all the water once boiled, the addition ratio cannot be grasped. If it is attempted to remove the components to such an extent that the presence of the components is not an issue, there is a problem in that the boiling state must be maintained for a long period of time equivalent to that of untreated water boiling.
【０００４】本発明は上記従来の問題を解決するもの
で、その第１の目的は、新しい水の追加水量に見合った
時間だけ水を加熱循環浄化させ、長時間沸騰状態を維持
させることもなく常にカルキ成分などの不要物質を十分
に除去する電気湯沸器を提供することである。The present invention solves the above-mentioned conventional problems. A first object of the present invention is to purify water by heating, circulating and purifying it for a time commensurate with the amount of new water added, without maintaining a boiling state for a long time. It is an object of the present invention to provide an electric water heater that always sufficiently removes unnecessary substances such as chlorine components.
【０００５】第２の目的は、自然冷却による温度変化と
混同することなく新たに水を追加したときを精度良く検
知し、必要なときに効率よく不要物質の除去を行なう経
済的で使いよい電気湯沸器を提供することである。The second purpose is to detect electricity when water is newly added without being confused with temperature change due to natural cooling, and to efficiently remove unnecessary substances when necessary. The purpose is to provide a water heater.
【０００６】[0006]
【課題を解決するための手段】上記第１の目的を達成す
るために本発明の電気湯沸器は、水を収容する容器と、
前記容器内の水を加熱する加熱源と、前記加熱源への通
電量を制御する制御手段と、前記水の温度を検知する温
度検知手段と、新たな水の追加を検知する水追加検知手
段と、前記水に対して複数の保温温度値から任意の保温
温度を選定する保温温度設定手段と、前記水を所定の温
度に維持させる保温手段と、前記水の容量を検知する容
量検知手段と、前記水を強制的に循環させる循環手段
と、前記循環手段にて送り込まれてきた水内の不要物質
を除去する濾過装置と、前記保温手段作動中新たな水の
追加を検知すると前記水の温度の低下量と前記水の温度
低下前の温度と前記水の温度変化後の容量検知手段の出
力値とに応じて前記循環手段の作動時間を決定する循環
時間決定手段を備えた構成を有したものである。In order to achieve the first object, the electric water heater of the present invention comprises a container for containing water,
A heating source that heats the water in the container, a control unit that controls the amount of electricity supplied to the heating source, a temperature detection unit that detects the temperature of the water, and a water addition detection unit that detects the addition of new water. A warming temperature setting means for selecting an arbitrary warming temperature from a plurality of warming temperature values for the water, a warming means for keeping the water at a predetermined temperature, and a capacity detecting means for detecting the capacity of the water. A circulating means for forcibly circulating the water; a filtering device for removing unnecessary substances in the water sent by the circulating means; and a water addition when the addition of new water is detected during operation of the heat retaining means. A configuration is provided that includes a circulation time determining unit that determines the operating time of the circulation unit according to the amount of temperature decrease, the temperature before the temperature decrease of the water, and the output value of the capacity detecting unit after the temperature change of the water. It was done.
【０００７】また、上記第２の目的を達成するために本
発明の電気湯沸器は、水追加検知手段が水の温度を一定
の検出時間周期で検出し、その検出値が所定時間内に所
定温度幅低下したときに新たな水の追加が行なわれたと
判断し、そのときの検出温度の最初の温度検出値を水の
温度低下前の温度とするように構成したものである。Further, in order to achieve the second object, in the electric water heater of the present invention, the water addition detecting means detects the temperature of water at a constant detection time period, and the detected value is within a predetermined time. When a predetermined temperature range is lowered, it is determined that new water is added, and the first temperature detection value of the detected temperature at that time is set to the temperature before the temperature drop of water.
【０００８】[0008]
【作用】上記構成により、所定の温度に保温されている
水に新たな水を追加すると、水温が急速に低下すること
で水追加検知手段が検知し、そのとき、水追加前の保温
温度とそのときの温度低下量と容量検知手段で検知され
る容器内の水量とから水の追加水量を検出し、循環装置
の循環能力と濾過装置の濾過効率にしたがって、追加水
量に見合った循環装置動作時間を自動的に決定し、容器
内の水が加熱されている間に循環装置を作動させ、沸騰
状態に到達したときにはすでにカルキ成分は十分除去で
きた状態とすることができる。With the above structure, when new water is added to the water kept at a predetermined temperature, the water temperature is rapidly lowered and the water addition detecting means detects the water temperature. The additional water amount of water is detected from the amount of temperature decrease at that time and the amount of water in the container detected by the capacity detection means, and the circulation device operation corresponding to the additional water amount is detected according to the circulation capacity of the circulation device and the filtration efficiency of the filtration device. The time can be automatically determined, and the circulation device can be operated while the water in the container is being heated so that the calcination component can be sufficiently removed when the boiling state is reached.
【０００９】さらに、水の加熱沸騰後所定の保温温度に
移行する際の温度降下や、容器内部での水の対流などに
より上下に変動する温度のゆれを水の追加による急速な
温度降下と明確に区別し、信頼性の高い水追加検知機能
を兼ね備えたものとすることができる。Furthermore, it is clear that the temperature drop when the temperature changes to a predetermined heat retention temperature after heating and boiling of water and the temperature fluctuation that fluctuates up and down due to convection of water inside the container are rapid temperature drops due to the addition of water. It is possible to distinguish it into two and to have a highly reliable additional water detection function.
【００１０】[0010]
【実施例】以下本発明の一実施例について図面を参照し
ながら説明する。図１は本発明の一実施例の電気湯沸器
の全体構成図である。図１において、本体容器１内に上
面開口の容器２が収容され、容器２の上部を覆う蓋３が
配置されている。また容器２の内部の水を加熱する加熱
源４と容器２の内部の水温を検知する温度センサー５と
が下方に配置されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram of an electric water heater according to an embodiment of the present invention. In FIG. 1, a container 2 having an upper surface opening is accommodated in a main body container 1, and a lid 3 that covers the upper portion of the container 2 is arranged. A heating source 4 that heats the water inside the container 2 and a temperature sensor 5 that detects the water temperature inside the container 2 are arranged below.
【００１１】容器２は下方の排出口６から電動ポンプ７
を介して導水管８に連通する水路が形成され、水路切り
替え装置９内の弁10の位置により外部導出口11あるいは
内部導出口12の何れかを選択して導水管８から水が送り
出される。内部導出口12より排出された水は、活性炭な
どを内蔵した濾過装置16を通りもとの容器２へもどされ
る。The container 2 is connected to the electric pump 7 from the lower discharge port 6.
A water channel communicating with the water guiding tube 8 via the water guiding tube 8 is formed, and water is sent out from the water guiding tube 8 by selecting either the external outlet 11 or the internal outlet 12 depending on the position of the valve 10 in the water channel switching device 9. The water discharged from the internal outlet 12 is returned to the original container 2 through the filtering device 16 containing activated carbon and the like.
【００１２】モータ13は電動ポンプ７を駆動して導水管
８から水を送り出すためのものである。また操作つまみ
14を操作するとスイッチ15の接点が切り替わり、その信
号により弁10が動作し導水管８は外部導出口11側に切り
替わると同時にモータ13が動作し容器２内の水を外部へ
導く。The motor 13 drives the electric pump 7 to feed water from the water conduit 8. Also operation knob
When the switch 14 is operated, the contact of the switch 15 is switched, the valve 10 is operated by the signal, and the water conduit 8 is switched to the external outlet 11 side, and at the same time, the motor 13 is operated to guide the water in the container 2 to the outside.
【００１３】温度センサ５の信号より温度検知手段18は
水温を検知し、その信号を容器２内の水量を検知する容
量検知手段19と、循環時間決定手段20と、水を一定温度
に保つ保温手段22と、新たに水が追加されたかを検知す
る水追加検知手段23とに入力する。The temperature detecting means 18 detects the water temperature from the signal of the temperature sensor 5, and the capacity detecting means 19 for detecting the water temperature in the container 2 by the signal, the circulation time determining means 20, and the heat retention for keeping the water at a constant temperature. Input to the means 22 and the water addition detection means 23 for detecting whether or not water is newly added.
【００１４】容量検知手段19出力は循環時間決定手段20
と制御手段21に入力され、循環時間決定手段20は入力信
号に応じてモータ13へ駆動信号を出力する。保温手段22
は温度検知手段18の出力と保温温度設定手段17の出力と
を比較し、その結果を制御手段21へ出力する。制御手段
21は加熱源４への通電量を決定する。水追加検知手段23
は温度検知手段18で検知される温度変化を絶えず検知し
ており、水温が急速に低下したとき新たな水が追加され
たものと判定し、その結果を循環時間決定手段20に出力
する。The output of the capacity detecting means 19 is the circulation time determining means 20.
And the circulation time determining means 20 outputs a drive signal to the motor 13 in response to the input signal. Thermal insulation 22
Compares the output of the temperature detecting means 18 with the output of the heat retention temperature setting means 17, and outputs the result to the control means 21. Control means
21 determines the amount of electricity supplied to the heating source 4. Additional water detection means 23
Constantly detects the temperature change detected by the temperature detecting means 18, determines that new water is added when the water temperature rapidly decreases, and outputs the result to the circulation time determining means 20.
【００１５】このように構成された電気湯沸器につい
て、その動作を図２を用いて説明する。図２は容器２に
圧接して取り付けられた温度センサー５の検知温度変化
を、加熱源４に通電された後の時間経過に対して示した
ものである。時間ｔ０では保温手段22は保温温度設定手
段17により設定された温度と温度検知手段18の出力との
大小関係を検知し、温度検知手段18の出力が大なるとき
は加熱源への通電量を小さくするように、また温度検知
手段18の出力が小なるときは逆に加熱源への通電量を大
きくするように制御手段21に出力信号を送り、水を常に
温度θ０に保温している。The operation of the electric water heater thus configured will be described with reference to FIG. FIG. 2 shows changes in the temperature detected by the temperature sensor 5 mounted in pressure contact with the container 2 against the passage of time after the heating source 4 is energized. At time t0, the heat retention means 22 detects the magnitude relationship between the temperature set by the heat retention temperature setting means 17 and the output of the temperature detection means 18, and when the output of the temperature detection means 18 is large, the amount of electricity to the heating source is changed. An output signal is sent to the control means 21 so as to decrease the output, and conversely, when the output of the temperature detection means 18 becomes small, the power supply amount to the heating source is increased to keep the water at the temperature θ0.
【００１６】温度検知手段18は絶えず水温を測定してお
り、時間ｔ１で新たに水（水量Ｗ１、水温θ１）が追加
されると、図２に示すように、水温はθａまで低下す
る。ここで、初期水量をＷ０とすると、この初期水量Ｗ
０と追加水量Ｗ１との間に次の関係式が成立する。The temperature detecting means 18 constantly measures the water temperature. When new water (water amount W1, water temperature θ1) is added at time t1, the water temperature drops to θa as shown in FIG. Here, if the initial water amount is W0, this initial water amount W
The following relational expression holds between 0 and the additional water amount W1.
【００１７】 Ｗ１／Ｗ０＝（θ０−θａ）／（θａ−θ１） Ｗ０＝Ｗ１・（θａ−θ１）／（θ０−θａ） 次に、容量検知手段19により所定温度範囲（θ２〜θ
３）の単位時間当りの温度上昇勾配（Δθ／Δｔ）に所
定の係数を乗算して容器２内の水量Ｗを算出する。この
ときの水量Ｗは次の式で表わされる。W1 / W0 = (θ0−θa) / (θa−θ1) W0 = W1 · (θa−θ1) / (θ0−θa) Next, the capacitance detection means 19 causes the temperature to fall within a predetermined temperature range (θ2 to θ).
The water amount W in the container 2 is calculated by multiplying the temperature increase gradient (Δθ / Δt) per unit time of 3) by a predetermined coefficient. The water amount W at this time is represented by the following equation.
【００１８】Ｗ＝Ｃ・（Δθ／Δｔ） なお、Ｃは容器断面面積や単位時間の加熱量によって決
定される定数である。また容器２内の水量Ｗと追加水量
Ｗ１との間には次の関係式が成立する。W = C (Δθ / Δt) C is a constant determined by the cross-sectional area of the container and the heating amount per unit time. Further, the following relational expression holds between the water amount W in the container 2 and the additional water amount W1.
【００１９】Ｗ＝Ｗ１＋Ｗ０ ＝Ｗ１｛１＋（θａ−θ１）／（θ０−θａ）｝ 以上より追加水量Ｗ１は式(1) のようになる。W = W1 + W0 = W1 {1+ (θa-θ1) / (θ0-θa)} From the above, the additional water amount W1 is expressed by the equation (1).
【００２０】 Ｗ１＝Ｃ・（Δθ／Δｔ）／｛１＋（θａ−θ１）／（θ０−θａ）｝…(1) ここで、θ０は保温温度決定手段17で選定された保温温
度つまり水温低下前の温度であり、（θ０−θａ）は水
追加によって生ずる温度低下量であり、Ｃ・（Δθ／Δ
ｔ）は容量検知手段19の出力値である。W1 = C · (Δθ / Δt) / {1+ (θa−θ1) / (θ0−θa)} (1) where θ0 is the heat retention temperature selected by the heat retention temperature determining means 17, that is, the water temperature decrease The previous temperature, (θ0-θa) is the amount of temperature decrease caused by the addition of water, and C · (Δθ / Δ
t) is the output value of the capacity detecting means 19.
【００２１】次に循環時間決定手段20は式(1) で求めた
追加水量Ｗ１に基づき、図３に示した特性曲線で定めら
れた循環時間Ｔを決定する。特性曲線は単位時間当りに
一定の比率で不要物質が除去されるため、追加水量が多
い程循環時間も指数関数的に増大していく。このとき循
環時間決定手段20は図４にその一例を示したように、上
記θ０をパラメータとするθａとＣ（Δθ／Δｔ）を変
数としたｎ×ｍマトリックス格子を形成し、θ１は常温
水温でほぼ一定とみなし、式(1) から求められる追加水
量に応じた循環時間を事前に前記マトリックス格子点に
記録した値（Ｔｉｊ）を読みだして決定するものであ
る。なお、上記循環時間決定手段20の機能はマイクロコ
ンピュータに置き換えることによって容易に実現できる
ことは言うまでもない。Next, the circulation time determining means 20 determines the circulation time T defined by the characteristic curve shown in FIG. 3 based on the additional water amount W1 obtained by the equation (1). In the characteristic curve, since unnecessary substances are removed at a constant rate per unit time, the circulation time increases exponentially as the amount of additional water increases. At this time, the circulation time determining means 20 forms an n × m matrix lattice having θa as a parameter and θ (Δθ / Δt) as variables as shown in FIG. Is considered to be almost constant and the circulation time according to the additional water amount obtained from the equation (1) is determined by reading the value (Tij) recorded in advance at the matrix grid point. Needless to say, the function of the circulation time determining means 20 can be easily realized by replacing it with a microcomputer.
【００２２】また沸騰状態に近ずくにつれ温度上昇勾配
（Δθ／Δｔ）は０に近ずき、時間ｔ４の時点で制御手
段21は水の沸騰を検知して加熱源４への通電量を低減さ
せ沸騰から再び設定された保温状態へと変化する。As the temperature approaches the boiling state, the temperature rising gradient (Δθ / Δt) approaches 0, and at time t4, the control means 21 detects the boiling of water and reduces the amount of electricity supplied to the heating source 4. Then, it changes from boiling to the set heat retention state again.
【００２３】次に本実施例の電気湯沸器における水追加
検知手段における動作を図５に、動作フローチャートを
図６に示して説明する。図５、図６において、水追加検
知手段23は前記水の温度を一定の検出時間周期Ｔｓで検
出し、その検出値（φｉ−φｉ＋ｎ）が所定時間（ｎ・
Ｔｓ：ｎは整数）内に所定温度幅（Δφｓ）未満のとき
は新たな水の追加が行なわれたと判断せず、新たな水の
追加が実際行なわれると検出値（φｊ−φｊ＋ｎ）は所
定時間（ｎ・Ｔｓ）内に所定温度幅（Δφｓ）以上低下
し、そのときに初めて水追加を検知して、そのときの検
出温度の最初の温度検出値（φｊ−１）を水の温度低下
前の温度（θ０）とする。Next, the operation of the water addition detecting means in the electric water heater of the present embodiment will be described with reference to FIG. 5 and an operation flowchart shown in FIG. In FIGS. 5 and 6, the water addition detecting means 23 detects the temperature of the water at a constant detection time period Ts, and the detected value (φi−φi + n) is a predetermined time (n ·
When Ts: n is less than a predetermined temperature range (Δφs) within the range, it is not judged that new water is added, and when new water is actually added, the detected value (φj−φj + n) is predetermined. Within a time (n · Ts), the temperature falls by more than a predetermined temperature range (Δφs), at which time water addition is detected for the first time, and the first detected temperature value (φj-1) of the detected temperature at that time is lowered by the water temperature. Let it be the previous temperature (θ0).
【００２４】以上のように本実施例によれば、容器内の
水温を検知することによって水が追加されたことを検知
し、どのような保温温度状態においても追加水量に応じ
た最適最短循環時間を決定する。したがって追加水量が
多いときには循環時間を長く、少ないときには短くし、
最低必要限のカルキ成分などの不要物質を除去し得る循
環時間を自動的に決定することができる。As described above, according to this embodiment, the addition of water is detected by detecting the water temperature in the container, and the optimum shortest circulation time according to the amount of added water is detected in any heat retention temperature state. To decide. Therefore, the circulation time should be long when the amount of additional water is large, and short when it is small.
It is possible to automatically determine the circulation time at which unnecessary substances such as the minimum necessary chlorine component can be removed.
【００２５】さらに水の加熱沸騰後所定の保温温度に移
行する際の温度降下や、容器内部での水の対流などによ
り上下に変動する温度のゆれを水の追加による急速な温
度降下と明確に区別し、信頼性の高い水追加検知機能を
兼ね備えたものとすることができる。Further, it is clear that the temperature drop at the time of shifting to a predetermined heat retention temperature after heating and boiling of water and the temperature fluctuation fluctuating up and down due to convection of water in the container are a rapid temperature drop due to addition of water. They can be distinguished and can also have a highly reliable additional water detection function.
【００２６】[0026]
【発明の効果】以上のように本発明によれば、強制濾過
装置を内蔵したものにおいて、保温状態で新たな水を追
加したとき、そのときの追加水量に応じて循環時間を決
定する循環時間決定手段を設けることによって、自動的
に容器内への追加水量が多いときには循環時間を長くし
少ないときは短くし、最低必要限のカルキ成分などの不
要物質を除去できる。さらに新たな水を追加したことを
内蔵されている温度センサーで精度よく検知でき、別途
部品の必要もない経済的で使いやすい電気湯沸器を提供
することができる。As described above, according to the present invention, when the forced filtration device is built in, when new water is added while keeping warm, the circulation time for determining the circulation time according to the amount of additional water at that time By providing the determining means, the circulation time can be automatically lengthened when the amount of additional water in the container is large and shortened when the amount of additional water is small, and unnecessary substances such as calcination components at the minimum necessary amount can be removed. Furthermore, it is possible to provide an economical and easy-to-use electric water heater that can detect the addition of new water with a built-in temperature sensor with high accuracy and does not require any additional parts.
【図１】本発明の一実施例の電気湯沸器の全体構成図で
ある。FIG. 1 is an overall configuration diagram of an electric water heater according to an embodiment of the present invention.
【図２】本発明の一実施例の電気湯沸器における水温変
動動作説明図である。FIG. 2 is an explanatory diagram of a water temperature fluctuation operation in the electric water heater according to the embodiment of the present invention.
【図３】本発明の一実施例の電気湯沸器における追加水
量と循環時間との関係を示す特性図である。FIG. 3 is a characteristic diagram showing the relationship between the additional water amount and the circulation time in the electric water heater of the embodiment of the present invention.
【図４】本発明の一実施例の電気湯沸器の循環時間決定
手段におけるマトリックス格子表を説明する図である。FIG. 4 is a diagram illustrating a matrix grid table in the circulation time determining means of the electric water heater according to the embodiment of the present invention.
【図５】本発明の一実施例の電気湯沸器の水追加検知手
段における水温検知動作説明図である。FIG. 5 is an explanatory diagram of a water temperature detecting operation in the water addition detecting means of the electric water heater according to the embodiment of the present invention.
【図６】本発明の一実施例の電気湯沸器の水追加検知手
段における動作フローチャート図である。FIG. 6 is an operation flowchart of the water addition detecting means of the electric water heater according to the embodiment of the present invention.
２ 容器 ４ 加熱源 13 モータ（循環装置） 16 濾過装置 17 保温温度設定手段 18 温度検知手段 19 容量検知手段 20 循環時間決定手段 21 制御手段 22 保温手段 23 水追加検知手段 2 container 4 heating source 13 motor (circulation device) 16 filtration device 17 heat retention temperature setting means 18 temperature detection means 19 capacity detection means 20 circulation time determination means 21 control means 22 heat retention means 23 water addition detection means
Claims (2)
加熱する加熱源と、前記加熱源への通電量を制御する制
御手段と、前記水の温度を検知する温度検知手段と、新
たな水の追加を検知する水追加検知手段と、前記水に対
して複数の保温温度値から任意の保温温度を選定する保
温温度設定手段と、前記水を所定の温度に維持させる保
温手段と、前記水の容量を検知する容量検知手段と、前
記水を強制的に循環させる循環手段と、前記循環手段に
て送り込まれてきた水に含まれる不要物質を除去する濾
過装置と、前記保温手段作動中新たな水の追加を検知す
ると前記水の温度の低下量と前記水の温度低下前の温度
と前記水の温度変化後の容量検知手段の出力値とに応じ
て前記循環手段の作動時間を決定する循環時間決定手段
を備えた電気湯沸器。1. A container for containing water, a heating source for heating the water in the container, a control unit for controlling the amount of electricity to the heating source, and a temperature detection unit for detecting the temperature of the water. Water addition detection means for detecting addition of new water, heat retention temperature setting means for selecting an arbitrary heat retention temperature from a plurality of heat retention temperature values for the water, and heat retention means for maintaining the water at a predetermined temperature A capacity detecting means for detecting the capacity of the water, a circulating means for forcibly circulating the water, a filtering device for removing unnecessary substances contained in the water sent by the circulating means, and the heat retaining means. When the addition of new water is detected during operation, the operating time of the circulation means is determined according to the amount of decrease in the temperature of the water, the temperature before the temperature decrease of the water, and the output value of the capacity detection means after the temperature change of the water. Electric water heater with circulation time determining means for determining .
出時間周期で検出し、その検出値が所定時間内に所定温
度幅低下したときに新たな水の追加が行なわれたと判断
し、そのときの検出温度の最初の温度検出値を水の温度
低下前の温度とする特許請求の範囲第１項記載の電気湯
沸器。2. The water addition detection means detects the temperature of water at a constant detection time period, and judges that new water has been added when the detected value falls within a predetermined temperature range within a predetermined time. The electric water heater according to claim 1, wherein the first detected temperature value of the detected temperature at that time is the temperature before the temperature of the water decreases.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4050985A JP2988769B2 (en) | 1992-03-10 | 1992-03-10 | Electric water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4050985A JP2988769B2 (en) | 1992-03-10 | 1992-03-10 | Electric water heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05253061A true JPH05253061A (en) | 1993-10-05 |
| JP2988769B2 JP2988769B2 (en) | 1999-12-13 |
Family
ID=12874095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4050985A Expired - Fee Related JP2988769B2 (en) | 1992-03-10 | 1992-03-10 | Electric water heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2988769B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08228928A (en) * | 1995-02-28 | 1996-09-10 | Tiger Vacuum Bottle Co Ltd | Electric hot water storage container |
-
1992
- 1992-03-10 JP JP4050985A patent/JP2988769B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08228928A (en) * | 1995-02-28 | 1996-09-10 | Tiger Vacuum Bottle Co Ltd | Electric hot water storage container |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2988769B2 (en) | 1999-12-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |