JP2666999B2 - Electric water heater - Google Patents
Electric water heaterInfo
- Publication number
- JP2666999B2 JP2666999B2 JP5756489A JP5756489A JP2666999B2 JP 2666999 B2 JP2666999 B2 JP 2666999B2 JP 5756489 A JP5756489 A JP 5756489A JP 5756489 A JP5756489 A JP 5756489A JP 2666999 B2 JP2666999 B2 JP 2666999B2
- Authority
- JP
- Japan
- Prior art keywords
- water level
- water
- detecting means
- container
- temperature
- 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 - Fee Related
Links
Landscapes
- Cookers (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は、容器内に収容された液体を加熱保温する電
気湯沸器に関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric water heater that heats and keeps liquid stored in a container.
従来の技術 従来、この種の電気湯沸器は第4図(a)に示すよう
な構成になっていた。すなわち、第4図(a)に示すよ
うに、容器1の内側の満水の位置に満水を示す刻印2を
ほどこしたり、もしくは容器1内の水位を確認するため
に外ケース3に取り付けられた取り付け枠4の満水表示
位置Aに、この部分を拡大した第4図(b)に示すよう
な“満水”という文字を表示し、水位を示す浮子5がこ
の表示位置に達したかどうか使用者が目視により確認し
ていた。2. Description of the Related Art Conventionally, this type of electric water heater has a configuration as shown in FIG. 4 (a). That is, as shown in FIG. 4 (a), a marking 2 indicating fullness is provided at the position of fullness inside the container 1, or an attachment attached to the outer case 3 for confirming the water level in the container 1. At the full water display position A of the frame 4, the character "full water" as shown in FIG. 4 (b) in which this portion is enlarged is displayed, and the user can check whether the float 5 indicating the water level has reached this display position. It was confirmed visually.
発明が解決しようとする課題 しかし、このような従来の構成では、満水か否かは刻
印による表示だけでわかりにくく、しかも、満水位置以
上に注水されていても容器1内の水は加熱することがで
き、沸騰時には水の熱膨張で吐出口より熱湯がふきこぼ
れる恐れがあるという問題を有していた。SUMMARY OF THE INVENTION However, in such a conventional configuration, it is difficult to determine whether or not the water is full by simply displaying a mark, and the water in the container 1 is heated even if the water is filled above the full water position. When boiling, there was a problem that hot water might spill out of the discharge port due to thermal expansion of water.
本発明は上記従来の問題を解決するもので、水温が所
定の温度未満とそれ以上の場合とで水位検知位置をわ
け、水位がそれぞれの検知位置に達することで確実に異
常を検知でき、発熱体の加熱を停止させるとともに、そ
の報知を行なって、危険を知らせることのできる電気湯
沸器を提供することを目的とするものである。The present invention solves the above-mentioned conventional problems, and divides the water level detection position depending on whether the water temperature is lower than or equal to a predetermined temperature, and when the water level reaches each detection position, it is possible to reliably detect an abnormality and generate heat. It is an object of the present invention to provide an electric water heater that can stop the heating of the body and notify the danger by informing the user of the danger.
課題を解決するための手段 上記課題を解決するために本発明の電気湯沸器は、液
体を収容する容器と、前記容器を加熱する発熱体と、前
記発熱体の通電を制御する加熱手段と、前記容器内の温
度を検知する温度検知手段と、前記容器に連結され前記
容器内の水位を示す水位管と、前記水位管の上部第1の
検知位置に設けられた第1の水位検知手段と、前記第1
の水位検知手段の上方の第2の検知位置に設けられた第
2の水位検知手段と、報知を行う報知手段と、前記温度
検知手段が所定の温度未満を検知すれば第1の水位検知
手段を、また所定温度以上を検知すれば第2の水位検知
手段を駆動し、それぞれの水位検知手段を設定された高
さに水位が達していれば、設定された高さより低くなる
まで加熱手段をオフし、前記報知手段を動作させる制御
手段とを備えたものである。Means for Solving the Problems In order to solve the above problems, the electric water heater of the present invention is a container that stores a liquid, a heating element that heats the container, and a heating unit that controls energization of the heating element. A temperature detecting means for detecting a temperature in the container, a water level pipe connected to the container for indicating a water level in the container, and a first water level detecting means provided at an upper first detection position of the water level pipe. And the first
Second water level detecting means provided at a second detection position above the water level detecting means, notifying means for giving notification, and first water level detecting means if the temperature detecting means detects a temperature lower than a predetermined temperature. If the temperature is equal to or higher than the predetermined temperature, the second water level detecting means is driven, and if the water level reaches the set height, the heating means is turned on until the water level becomes lower than the set height. Control means for turning off and operating the notifying means.
作用 上記構成により、水温の低いときには熱膨張により水
位が上昇するためにそれを考慮して第1の検知位置で第
1の水位検知手段による満水検知を行って報知し、温度
が高いときには熱膨張もわずかであるので、第2の検知
位置付近まで水位が達しても吐出口から湯がふきこぼれ
るほど水位が上がらないために、危険のない状態で第2
の水位検知手段による検知を行って報知し、いずれの場
合においても発熱手段をオフし、水の入れすぎにより沸
騰時に熱湯が吐出口からふきこぼれることを防止する。According to the above configuration, when the water temperature is low, the water level rises due to thermal expansion, so that the water level is taken into consideration and the first water level detecting means performs full-water detection at the first detection position to report the water level. Since the water level is small, the water level does not rise to such an extent that the hot water spills from the discharge port even when the water level reaches near the second detection position.
The water level detection means of FIG. 2 performs detection to notify, and in any case, the heat generation means is turned off to prevent hot water from spilling from the discharge port at the time of boiling due to too much water.
実施例 以下、本発明の一実施例を図面を用いて説明する。Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
第1図は本発明の一実施例の電気湯沸器の満水検知処
理の構成を示したブロック図である。第1図において、
水位管11は、液体を収容する容器12上部および下部で連
結され、液体の容量により浮き沈みする浮子13により容
器12内の水位を外部に表示するものである。第1の水位
検知手段であるL検知手段14は、満水の刻印のある高さ
において、水位管部に取り付けられている。第2の水位
検知手段であるH検知手段15は、L検知手段14の上方
(ここでは第1の検知位置未満の水位において加熱した
場合に熱膨張しても到達しない高さで約5mm)に取り付
けられている。これらL検知手段14およびH検知手段15
は、常時満水検知を行なっており、その出力は制御手段
16に入力されている。加熱手段17は、容器12の底面に取
り付けられた発熱体18の制御を行う。温度検知手段19
は、容器12の底面の温度を検知し、制御手段16に入力す
るものである。報知手段20は、水位検知手段が満水を検
知すると、外部に満水であることを知らせるものであ
る。制御手段16はL検知手段14、H検知手段15および温
度検知手段19の出力を入力とし、加熱手段17および報知
手段20を駆動制御するものである。FIG. 1 is a block diagram showing a configuration of a full water detecting process of an electric water heater according to one embodiment of the present invention. In FIG.
The water level tube 11 is connected to the upper and lower parts of a container 12 for containing a liquid, and displays the water level in the container 12 to the outside by a float 13 that floats and sinks depending on the volume of the liquid. The L detecting means 14, which is the first water level detecting means, is attached to the water level tube at a height with a mark of full water. The H detection means 15, which is the second water level detection means, is located above the L detection means 14 (here, the height is about 5 mm at which the water does not reach even if it is thermally expanded when heated at a water level lower than the first detection position). Installed. These L detecting means 14 and H detecting means 15
Is always full, and its output is
16 is entered. The heating means 17 controls a heating element 18 attached to the bottom of the container 12. Temperature detection means 19
Is for detecting the temperature of the bottom surface of the container 12 and inputting it to the control means 16. The notifying means 20 notifies the outside that the water is full when the water level detecting means detects that the water is full. The control means 16 receives the outputs of the L detection means 14, the H detection means 15 and the temperature detection means 19 and controls the driving of the heating means 17 and the notification means 20.
上記構成の電気湯沸器についてさらに詳しく説明す
る。The electric water heater having the above configuration will be described in more detail.
第2図は本発明の一実施例の電気湯沸器の満水検知処
理の回路図である。第2図において、交流電源21と直流
電源22が回路全体に電圧を供給している。制御手段16は
マイクロコンピューター(以下マイコンという)23で構
成されている。L検知手段14およびH検知手段15は、そ
れぞれフォトダイオード24,25とフォトトランジスタ26,
27と抵抗によって、それぞれ構成されており、容器12内
の水量により浮子13がそれぞれの検知位置まで達すると
フォトダイオード24、または25の光は遮られてフォトト
ランジスタ26または27はオフし、このとき、マイコン23
には“H"が入力される。一方、浮子13がそれぞれの検知
位置になければ、フォトトランジスタ26または27はフォ
トダイオード24または25の光を受けてオンし、このと
き、マイコン23には“L"が入力される。加熱手段17は、
リレー接点28、リレーコイル29およびトランジスタ30に
より構成され、マイコン23から抵抗を介してトランジス
タ30のベースに“H"が出力されると、トランジスタ30を
通してリレーコイル29に電流が流れ、リレー接点28は閉
じて発熱体18を加熱する。報知手段20は満水時の表示を
するLED31とブザー32によって構成され、満水検知時に
マイコン23の命令によって駆動し、使用者に視覚および
聴覚で知らせる。温度検知手段19はコンパレータ33を有
し、コンパレータ33の+側入力端子には、抵抗34,35に
よって分圧された基準電位が入力され、−側入力端子に
は、サーミスタ36とサーミスタ36が所定の温度(本実施
例では85℃)以上を検知したときに+側入力端子に入力
される基準電圧よりも高い電位になるような抵抗値を持
つ抵抗37で分圧された電位が入力され、その出力はマイ
コン23に入力されている。FIG. 2 is a circuit diagram of full water detection processing of the electric water heater according to the embodiment of the present invention. In FIG. 2, an AC power supply 21 and a DC power supply 22 supply a voltage to the entire circuit. The control means 16 is composed of a microcomputer (hereinafter referred to as a microcomputer) 23. The L detecting means 14 and the H detecting means 15 include photodiodes 24 and 25 and phototransistors 26 and 25, respectively.
When the float 13 reaches the respective detection position due to the amount of water in the container 12, the light of the photodiode 24 or 25 is blocked and the phototransistor 26 or 27 is turned off. , Microcomputer 23
Is input with "H". On the other hand, if the float 13 is not at the respective detection positions, the phototransistor 26 or 27 receives light from the photodiode 24 or 25 and turns on. At this time, “L” is input to the microcomputer 23. The heating means 17
The microcomputer 23 includes a relay contact 28, a relay coil 29, and a transistor 30. When "H" is output from the microcomputer 23 to the base of the transistor 30 via a resistor, a current flows through the relay coil 29 through the transistor 30, and the relay contact 28 The heating element 18 is closed and heated. The notifying means 20 is constituted by an LED 31 and a buzzer 32 for indicating when the water is full, and is driven by a command of the microcomputer 23 when the water is detected to notify the user visually and audibly. The temperature detecting means 19 has a comparator 33. A reference potential divided by the resistors 34 and 35 is input to a positive input terminal of the comparator 33, and a thermistor 36 and a thermistor 36 are specified to a negative input terminal. Is detected (85 ° C. in this embodiment) or more, a potential divided by a resistor 37 having a resistance value such that the potential becomes higher than the reference voltage inputted to the + input terminal is inputted. The output is input to the microcomputer 23.
第3図はマイコン23の満水検知処理の主要動作を示す
フローチャートである。電気湯沸器に注水されると、ま
ず、ステップ41で、温度検知手段19の出力をマイコン23
に入力し、ステップ42で、マイコン23は水温が85℃以上
であるか否かを判断し、85℃未満ならステップ43のL検
知手段14の入力信号によって、また85℃以上ならステッ
プ44のH検知手段15の入力信号によって、ステップ45で
満水か否かを判断する。このステップ45で満水でなけれ
ば次の工程へ進み、満水ならば、ステップ46で、水位が
設定高さより低くなるまで加熱手段17により発熱体18へ
の通電を停止するとともに、報知手段20を駆動し、次の
工程に進む。FIG. 3 is a flowchart showing the main operation of the microcomputer 23 in the full water detection process. When water is injected into the electric water heater, first, in step 41, the output of the temperature detecting
In step 42, the microcomputer 23 determines whether or not the water temperature is 85 ° C. or higher. If the temperature is lower than 85 ° C., the L detection means 14 inputs the signal in step 43. If 85 ° C. or higher, the microcomputer 23 determines H in step 44. Based on the input signal of the detection means 15, it is determined at step 45 whether or not the water is full. If the water is not full in step 45, the process proceeds to the next step.If the water is full, in step 46, the power supply to the heating element 18 is stopped by the heating means 17 and the notification means 20 is driven until the water level becomes lower than the set height. Then, proceed to the next step.
以上のように本実施例によれば、所定の温度未満で
は、第1の検知位置、所定温度以上であれば第2の検知
位置よりも上方に水位があると、加熱をせずに報知し、
これにより安全に動作させることができる。As described above, according to the present embodiment, when the temperature is lower than the predetermined temperature, the water level is above the first detection position and above the second detection position when the temperature is higher than the predetermined temperature. ,
This allows safe operation.
発明の効果 以上のように本発明によれば、容器への水の入れすぎ
により、沸騰時に熱湯が吐出口からふきこぼれること
を、簡単な構成で確実に防ぐことができ、安全な電気湯
沸器を得ることができるものである。Advantageous Effects of the Invention As described above, according to the present invention, it is possible to reliably prevent hot water from spilling out of the discharge port at the time of boiling due to too much water in a container with a simple configuration, and to provide a safe electric water heater. Can be obtained.
第1図は本発明の一実施例を示す電気湯沸器の満水検知
処理のブロック図、第2図は同電気湯沸器の満水検知処
理の回路図、第3図は同電気湯沸器の満水検知処理のた
めのマイコンの主要動作を示すフローチャート、第4図
(a)は従来の電気湯沸器の一部切り欠き斜視図、第4
図(b)は第4図(a)のA部拡大図である。 11……水位管、12……容器、14……L検知手段、15……
H検知手段、16……制御手段、17……加熱手段、18……
発熱体、19……温度検知手段、20……報知手段、23……
マイコン、24,25……フォトダイオード、26,27……フォ
トトランジスタ、28……リレー接点、29……リレーコイ
ル、30……トランジスタ、31……LED、32……ブザー、3
3……コンパレータ、34,35,37……抵抗、36……サーミ
スタ。FIG. 1 is a block diagram of full water detection processing of an electric water heater showing an embodiment of the present invention, FIG. 2 is a circuit diagram of full water detection processing of the electric water heater, and FIG. 3 is the same electric water heater. FIG. 4 (a) is a partially cutaway perspective view of a conventional electric water heater, showing a main operation of the microcomputer for the full water detection process.
FIG. 4B is an enlarged view of a portion A in FIG. 4A. 11 ... water level tube, 12 ... container, 14 ... L detection means, 15 ...
H detection means, 16 control means, 17 heating means, 18
Heating element, 19 …… Temperature detection means, 20 …… Notification means, 23 ……
Microcomputer, 24, 25 Photodiode, 26, 27 Phototransistor, 28 Relay contact, 29 Relay coil, 30 Transistor, 31 LED, 32 Buzzer, 3
3… Comparator, 34,35,37… Resistance, 36… Thermistor.
Claims (1)
る発熱体と、前記発熱体の通電を制御する加熱手段と、
前記容器内の温度を検知する温度検知手段と、前記容器
に連結された前記容器内の水位を示す水位管と、前記水
位管の上部第1の検知位置に設けられた第1の水位検知
手段と、前記第1の水位検知手段の上方の第2の検知位
置に設けられた第2の水位検知手段と、報知を行う報知
手段と、前記温度検知手段が所定の温度未満を検知すれ
ば第1の水位検知手段を、また所定温度以上を検知すれ
ば第2の水位検知手段を駆動し、それぞれの水位検知手
段を設定された高さに水位が達していれば設定された高
さより低くなるまで加熱手段をオフし、前記報知手段を
動作させる制御手段とを備えた電気湯沸器。1. A container for containing a liquid, a heating element for heating the container, and heating means for controlling energization of the heating element.
Temperature detecting means for detecting the temperature in the container, a water level pipe connected to the container for indicating the water level in the container, and first water level detecting means provided at an upper first detection position of the water level pipe. A second water level detecting means provided at a second detection position above the first water level detecting means, an informing means for informing, and the temperature detecting means if the temperature is lower than a predetermined temperature. The first water level detecting means is driven, and the second water level detecting means is driven when a predetermined temperature or more is detected. If the respective water level detecting means reach the set height, the water level is lower than the set height. An electric water heater comprising a control unit for turning off the heating unit until the notification unit operates.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5756489A JP2666999B2 (en) | 1989-03-09 | 1989-03-09 | Electric water heater |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5756489A JP2666999B2 (en) | 1989-03-09 | 1989-03-09 | Electric water heater |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH02234724A JPH02234724A (en) | 1990-09-17 |
JP2666999B2 true JP2666999B2 (en) | 1997-10-22 |
Family
ID=13059330
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5756489A Expired - Fee Related JP2666999B2 (en) | 1989-03-09 | 1989-03-09 | Electric water heater |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2666999B2 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH691948A5 (en) * | 2000-06-28 | 2001-12-14 | V Zug Ag | Boiler for steam generator in steam cooking unit, comprises sensors for measuring water and heating element temperatures, and lime scale detection unit utilizing signals from these sensors |
CN105615613B (en) * | 2014-11-07 | 2019-11-19 | 浙江苏泊尔家电制造有限公司 | Cooker |
-
1989
- 1989-03-09 JP JP5756489A patent/JP2666999B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH02234724A (en) | 1990-09-17 |
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