JPH0331234Y2 - - Google Patents
Info
- Publication number
- JPH0331234Y2 JPH0331234Y2 JP1986023962U JP2396286U JPH0331234Y2 JP H0331234 Y2 JPH0331234 Y2 JP H0331234Y2 JP 1986023962 U JP1986023962 U JP 1986023962U JP 2396286 U JP2396286 U JP 2396286U JP H0331234 Y2 JPH0331234 Y2 JP H0331234Y2
- Authority
- JP
- Japan
- Prior art keywords
- pot
- electrode
- water level
- container
- water
- 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.)
- Expired
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 62
- 238000001514 detection method Methods 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 4
- 238000005086 pumping Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- -1 for example Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Landscapes
- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
- Thermally Insulated Containers For Foods (AREA)
- Cookers (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
この考案は電気ポツトの水位検出用電極構造に
関する。[Detailed description of the invention] Industrial application field This invention relates to an electrode structure for detecting water level in an electric pot.
従来の技術
従来、電気ポツトの空焚きを防止するためポツ
ト本体容器内の水位を検出し、水位が基準水位以
下に低下したとき、警告を発したり、ヒータへの
通電を停止させるようにした電気ポツトが提案さ
れている。この種の電気ポツトでは、容器内の水
位を検出するための水位検出手段として、例え
ば、実開昭57−166537号公報にて水位表示管内の
水の有無によつて静電容量の変化を検出するよう
にしたものが、また実開昭58−179043号公報にて
水位表示管内の遮光フロータの上下動あるいは内
容液の上下動をフオトセンサで検出するようにし
たものが、さらに特開昭58−103418号公報にてポ
ツト本体容器の深さ方向に所定間隔をおいてポツ
ト本体容器内に突出する複数の検知電極を設け、
該検知電極と接地電極又は容器との導通の有無に
より水位を検出するようにしたものが、それぞれ
提案されている。Conventional technology Conventionally, in order to prevent an electric kettle from running dry, electric kettles were designed to detect the water level in the main container of the pot, and when the water level fell below a standard water level, issue a warning or stop the power supply to the heater. Pottuto is proposed. In this type of electric pot, as a water level detection means for detecting the water level in the container, for example, Japanese Utility Model Application No. 57-166537 detects changes in capacitance depending on the presence or absence of water in the water level indicator tube. Japanese Utility Model Application Publication No. 58-179043 discloses a device in which the vertical movement of a light-shielding floater in a water level display tube or the vertical movement of the liquid content is detected by a photo sensor. In Japanese Patent No. 103418, a plurality of sensing electrodes are provided that protrude into the pot body container at predetermined intervals in the depth direction of the pot body container,
Various methods have been proposed in which the water level is detected based on the presence or absence of electrical continuity between the sensing electrode and the ground electrode or container.
考案が解決しようとする問題点
しかしながら、静電容量の変化やフオトセンサ
で水位を検出用するものでは、ガラス製水位表示
管に部品を装着しなければならないため、その取
り扱いに留意しなければならず、また、ポツト本
体容器に複数の電極を設けたものでは電極とポツ
ト本体容器との絶縁やシールが困難であるという
製造上の問題がある他、検知電極が針状である場
合、水との接触面積が小さいため、水を入れた時
に生じる気泡や加熱時に発生する気泡により電極
が覆われて電気的に水から遮断され、十分に水が
ある場合でも非導通となる問題もあつた。Problems that the invention aims to solve However, in devices that detect water levels using capacitance changes or photo sensors, parts must be attached to the glass water level display tube, so care must be taken when handling them. In addition, when the pot body container has multiple electrodes, there is a manufacturing problem in that it is difficult to insulate and seal the electrodes and the pot body container, and if the detection electrode is needle-shaped, it may be difficult to insulate or seal the pot body container. Because the contact area is small, the electrodes are covered by bubbles generated when water is added or bubbles generated during heating, and are electrically isolated from the water, resulting in non-conductivity even when there is sufficient water.
問題点を解決する手段
この考案は、前記問題を解決する手段として、
金属製のポツト本体容器を一方の電極とし、該電
極と他方の電極との導通の有無により水位を検出
する水位検出装置用の電極において、前記他方の
電極を、前記ポツト本体容器外に該ポツト本体容
器と電気的に絶縁して並設され、かつ、絶縁性チ
ユーブを介してポツト本体内部と連通する導電性
揚水管で構成するようにしたものである。Means to solve the problem This invention, as a means to solve the above problem,
In an electrode for a water level detection device that uses a metal pot body container as one electrode and detects the water level based on the presence or absence of conduction between the electrode and the other electrode, the other electrode is placed outside the pot body container. It is constructed of an electrically conductive water lift pipe that is electrically insulated and installed in parallel with the main container and communicates with the inside of the pot main body via an insulating tube.
本考案の実施態様においては、前記揚水管はそ
の下端がポツト本体容器の下部に装着されたバン
ドヒータの上端のレベルと略同一又はそれより上
位になるように配設される。また、他の実施態様
においては、揚水管は相互に絶縁チユーブで接続
された２以上の短管で構成され、最下位の短管を
その下端がポツト本体容器の下部に装着されたバ
ンドヒータの上端のレベルと略同一又はそれより
上位になるように配設すると共に、最上位の短管
をその下端がポツト本体容器の満水位と同レベル
になるように配設される。 In an embodiment of the present invention, the water pump is arranged such that its lower end is approximately at the same level as or higher than the upper end of the band heater attached to the lower part of the pot body container. In another embodiment, the pumping pipe is composed of two or more short pipes connected to each other by insulating tubes, and the lower end of the lowest short pipe is attached to a band heater attached to the lower part of the pot main body container. The pot is disposed so that it is approximately at the same level as or higher than the upper end, and the uppermost short pipe is disposed so that its lower end is at the same level as the full water level of the pot main body container.
作 用
本考案に係る電極構造においては、ポツト本体
容器内に十分な水量がある場合には、揚水管とポ
ツト本体容器間が電気的に接続されることにな
り、また揚水管内の水位がヒータの上端のレベル
以下に低下した場合には、揚水管とポツト本体容
器との間が電気的に絶縁されるため、両者は水位
検出用電極として利用できる。Function In the electrode structure according to the present invention, when there is a sufficient amount of water in the pot main body container, the water pump and the pot main container are electrically connected, and the water level in the water pump is lowered by the heater. When the water level drops below the level of the upper end of the water level, the water pump and the pot body container are electrically insulated, so that both can be used as electrodes for detecting the water level.
以下、本考案の実施例について添付の図面を参
照して説明する。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
第１図において、１はポツト本体容器、２は揚
水管で、揚水管２は導電性材料、例えば、ステン
レス鋼で形成され、その下端はバンドヒータ８と
略同一レベルで終端し、可撓性材料で形成された
分岐管３、ジヨイント４、Ｌ型絶縁性チユーブ
５、およびポツト本体容器１の底部に固設された
Ｌ字管６を介してポツト本体容器１に連通してい
る。揚水管２の上端は、安全弁９を介してストレ
ーナ１０に接続されている。なお、第２図に示す
ように、ジヨイント４を省略し、分岐管３と絶縁
性チユーブ５を一体的に構成しても良い。 In FIG. 1, 1 is a pot body container, 2 is a water lift pipe, the water pipe 2 is made of a conductive material, for example, stainless steel, its lower end terminates at approximately the same level as the band heater 8, and a flexible It communicates with the pot body container 1 through a branch pipe 3, a joint 4, an L-shaped insulating tube 5, and an L-shaped tube 6 fixed to the bottom of the pot body container 1, which are made of material. The upper end of the water pump 2 is connected to a strainer 10 via a safety valve 9. Note that, as shown in FIG. 2, the joint 4 may be omitted and the branch pipe 3 and the insulating tube 5 may be constructed integrally.
前記分岐管３の枝管３ａにはガラス製水位表示
管７の下端が接続され、その上端は安全弁９に連
通している。 The lower end of a glass water level indicator tube 7 is connected to the branch pipe 3a of the branch pipe 3, and the upper end thereof communicates with a safety valve 9.
容器１にはリード線１２が、また、揚水管２の
外壁にはリード線１３がハンダ付けされている。
１１は容器１を電気ポツトの外装体（図示せず）
に固定する足金具である。 A lead wire 12 is soldered to the container 1, and a lead wire 13 is soldered to the outer wall of the water pump 2.
Reference numeral 11 refers to the container 1 as an exterior body of an electric pot (not shown).
It is a foot bracket that is fixed to the
前記構成の揚水管２を電気ポツトの水位検出用
電極として使用する場合、容器１内にバンドヒー
タ８の上端よりも上に水位がくるように水を入
れ、容器１と揚水管２との間に電圧、例えば、第
２図に示すように、パルス電圧発生器１４から抵
抗Ｒを介して４秒に１回の割合で1mSのパルス電
圧を印加すると、容器１と揚水管２との間は揚水
管内の水によつて導通しているため、両者間には
電位差は殆ど生ぜず、電圧検出手段１５には電圧
が検出されない。 When the water pump 2 having the above structure is used as a water level detection electrode for an electric pot, water is poured into the container 1 so that the water level is above the upper end of the band heater 8, and the water is placed between the container 1 and the water pump 2. For example, as shown in FIG. 2, when a pulse voltage of 1 mS is applied from the pulse voltage generator 14 through the resistor R once every 4 seconds, the voltage between the container 1 and the pumping pipe 2 is Since the water in the pumping pipe is electrically conductive, there is almost no potential difference between the two, and the voltage detection means 15 does not detect any voltage.
しかし、容器１内の水位がバンドヒータ８の上
端よりも低い場合、容器１と揚水管２との間に水
が存在しなくなるため、両者間が絶縁され、両者
間の抵抗が無限大になるため、パルス電圧がその
まま電圧検出手段１５に入力されることになり、
それによつて水位を検出すことができることにな
る。 However, if the water level in the container 1 is lower than the upper end of the band heater 8, there will be no water between the container 1 and the pumping pipe 2, so the two will be insulated and the resistance between them will become infinite. Therefore, the pulse voltage is input as is to the voltage detection means 15,
This makes it possible to detect the water level.
第３図は本考案の他の実施例を示し、揚水管２
を相互に絶縁性チユーブで連結した複数の金属製
短管２ａ，２ｂ，２ｃで構成し、最下位の短管２
ａをその下端が容器１の下部に装着されたバンド
ヒータ８の上端とほぼ等しい下限水位Lminとほ
ぼ同レベルになるように配設すると共に、最上位
の短管２ｃをその下端が容器１の満水位Lmaxと
同レベルになるように配設したもので、満水位以
上に入れた場合の自然吐出を防止してある。この
場合、抵抗R1〜R3を介して各短管２ａ，２ｂ，
２ｃを水位検出回路に接続し、各短管と容器１と
の間の導通または不導通を検出することにより容
器１内の水位を上限、下限だけでなく途中の水位
も検出できる。 FIG. 3 shows another embodiment of the present invention, in which the pumping pipe 2
consists of a plurality of metal short tubes 2a, 2b, 2c connected to each other by insulating tubes, and the lowest short tube 2
A is arranged so that its lower end is approximately at the same level as the lower limit water level Lmin, which is approximately equal to the upper end of the band heater 8 attached to the lower part of the container 1, and the uppermost short pipe 2c is arranged so that its lower end is at the same level as the lower limit water level Lmin, which is approximately equal to the upper end of the band heater 8 attached to the lower part of the container 1. It is arranged so that it is at the same level as the full water level Lmax, and prevents natural discharge when the water is filled above the full water level. In this case, each short pipe 2a , 2b ,
2c is connected to a water level detection circuit, and by detecting continuity or non-continuity between each short pipe and the container 1, not only the upper and lower limits of the water level in the container 1 but also the intermediate water level can be detected.
考案の効果
以上の説明から明らかなように、本考案によれ
ば、水位検出電極を共に電気ポツトの構成部品で
ある金属製本体容器と揚水管とで構成しているた
め、新たな電極部品が不要で簡単な構造にでき、
しかも、電極がステンレス鋼その他の金属材料で
形成されるため、取り扱いが簡単で耐久性を向上
させることができると共に、電気ポツトの組み立
てが容易となり、コスト低減を図ることができ
る。さらに、電極として機能する本体容器と揚水
管は、従来のポツト本体容器内に突出させた電極
に比べて水との接触可能な面積が著しく大きいた
め確実に内容液と接触させることができ、しか
も、ポツト本体容器との絶縁やシールが不要とな
り、また、両者が絶縁性チユーブで接続されてい
るため、水の無いときは確実に非接触状態とする
ことができ、従つて、動作の信頼性を向上させる
ことができるという優れた効果が得られる。Effects of the invention As is clear from the above explanation, according to the invention, the water level detection electrode is composed of a metal main body container and a water pump, both of which are components of an electric pot, so new electrode parts are required. It is unnecessary and can be made into a simple structure,
Moreover, since the electrodes are made of stainless steel or other metal material, they are easy to handle and have improved durability, and the electric pot can be easily assembled, leading to cost reductions. Furthermore, the main body container and water pumping pipe, which function as electrodes, have a significantly larger surface area that can come into contact with water than conventional electrodes that protrude into the main pot container, so they can be brought into reliable contact with the liquid inside. , there is no need for insulation or sealing between the pot and the main container, and since both are connected by an insulating tube, it is possible to ensure a non-contact state when there is no water, thus improving the reliability of operation. An excellent effect can be obtained in that it can improve the
第１図は本考案の一実施例を示す電気ポツトの
説明図、第２図はその変形例を示す電気ポツトの
電気回路ブロツク図、第３図は他の実施例を示す
説明図である。
１……ポツト本体容器、２……揚水管、２ａ，
２ｂ，２ｃ……短管、３……絶縁性分岐管、４…
…ジヨイント、５……Ｌ型絶縁性チユーブ、７…
…水位表示管、１２，１３……リード線。
FIG. 1 is an explanatory diagram of an electric pot showing one embodiment of the present invention, FIG. 2 is an electric circuit block diagram of the electric pot showing a modification thereof, and FIG. 3 is an explanatory diagram showing another embodiment. 1... Pot main container, 2... Lifting pipe, 2a,
2b, 2c...Short pipe, 3...Insulating branch pipe, 4...
...Joint, 5...L-type insulating tube, 7...
...Water level display tube, 12, 13...Lead wire.
Claims (1)
該電極と他方の電極との導通の有無により水位
を検出する水位検出装置用の電極において、前
記他方の電極を、前記ポツト本体容器外に該ポ
ツト本体容器と電気的に絶縁して並設され、か
つ、絶縁性チユーブを介してポツト本体内部と
連通する導電性揚水管で構成したことを特徴と
する電気ポツトの水位検出用電極構造。 (2) 前記揚水管をその下端がポツト本体容器の下
部に装着されたバンドヒータの上端のレベルと
略同一又はそれより上位になるように配設した
実用新案登録請求の範囲第１項記載の電極構
造。 (3) 前記揚水管が相互に絶縁チユーブで接続され
た２以上の短管からなり、最下位の短管をその
下端がポツト本体容器の下部に装着されたバン
ドヒータの上端のレベルと略同一又はそれより
上位になるように配設すると共に、最上位の短
管をその下端がポツト本体容器の満水位と同レ
ベルになるように配設してなる実用新案登録請
求の範囲第１項記載の電極構造。[Claims for Utility Model Registration] (1) A metal pot body container is used as one electrode,
In an electrode for a water level detection device that detects the water level based on the presence or absence of conduction between the electrode and the other electrode, the other electrode is installed in parallel with and electrically insulated from the pot main container outside the pot main container. 1. An electrode structure for detecting a water level in an electric pot, characterized in that the electrode structure is composed of a conductive water pump that communicates with the inside of the pot body via an insulating tube. (2) The utility model according to claim 1, wherein the lift pipe is arranged so that its lower end is approximately at the same level as or higher than the upper end of a band heater attached to the lower part of the pot main body container. Electrode structure. (3) The lifting pipe consists of two or more short pipes connected to each other by insulating tubes, and the lower end of the lowest short pipe is approximately at the same level as the upper end of the band heater attached to the lower part of the pot main body container. or higher than that, and the uppermost short pipe is arranged so that its lower end is at the same level as the full water level of the pot body container, as described in claim 1 of the utility model registration claim. electrode structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986023962U JPH0331234Y2 (en) | 1986-02-20 | 1986-02-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986023962U JPH0331234Y2 (en) | 1986-02-20 | 1986-02-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62136923U JPS62136923U (en) | 1987-08-28 |
| JPH0331234Y2 true JPH0331234Y2 (en) | 1991-07-02 |
Family
ID=30822755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986023962U Expired JPH0331234Y2 (en) | 1986-02-20 | 1986-02-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0331234Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2600819B2 (en) * | 1988-07-07 | 1997-04-16 | 松下電器産業株式会社 | Electric water heater |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5987714U (en) * | 1982-12-06 | 1984-06-14 | 三洋電機株式会社 | Electric jar pot safety device |
| JPS5993347U (en) * | 1982-12-13 | 1984-06-25 | タイガー魔法瓶株式会社 | Liquid container with liquid level detection device |
-
1986
- 1986-02-20 JP JP1986023962U patent/JPH0331234Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62136923U (en) | 1987-08-28 |
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