JP2523737B2 - Dishwasher safety device - Google Patents
Dishwasher safety deviceInfo
- Publication number
- JP2523737B2 JP2523737B2 JP62328562A JP32856287A JP2523737B2 JP 2523737 B2 JP2523737 B2 JP 2523737B2 JP 62328562 A JP62328562 A JP 62328562A JP 32856287 A JP32856287 A JP 32856287A JP 2523737 B2 JP2523737 B2 JP 2523737B2
- Authority
- JP
- Japan
- Prior art keywords
- heater
- driving means
- temperature
- dishwasher
- switch
- 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 - Lifetime
Links
Landscapes
- Washing And Drying Of Tableware (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明は食器等をヒータにより加熱した洗浄水により
洗浄したり、あるいはヒータ加熱により乾燥を行う食器
洗い機の安全装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for a dishwasher that cleans dishes and the like with washing water heated by a heater or dries by heating with a heater.
従来の技術 従来の食器洗い機は第４図および第５図に示す構成で
あった。すなわち、１は洗い，すすぎ，乾燥工程のプロ
グラムを制御する制御手段で、排水弁2a,給水弁2b,水の
撹拌を行う洗浄ポンプ2c等からなる負荷２を制御して上
記各工程を制御する。３は水や洗浄槽６内底部に配した
ヒータで、ヒータ駆動手段４を介して制御手段１により
制御される。５は水や洗浄槽６内の温度を検知する温度
検知手段で、制御手段１に出力する。７は洗浄槽６内温
度が異常に高い時動作するヒータと直列に接続した温度
ヒューズである。2. Description of the Related Art A conventional dishwasher has a structure shown in FIGS. 4 and 5. That is, 1 is a control means for controlling the program of the washing, rinsing, and drying steps, and controls the load 2 consisting of the drain valve 2a, the water supply valve 2b, the washing pump 2c for stirring the water, etc. to control the above steps. . Reference numeral 3 denotes water or a heater arranged at the bottom of the cleaning tank 6, which is controlled by the control means 1 via the heater driving means 4. Reference numeral 5 is a temperature detection means for detecting the temperature of water or the temperature in the cleaning tank 6, and outputs it to the control means 1. Reference numeral 7 is a temperature fuse connected in series with a heater that operates when the temperature inside the cleaning tank 6 is abnormally high.
次に動作を説明すると、給水弁2bを開き洗浄槽６に洗
浄水をため、水に、洗浄ポンプ2cにより水を撹拌しなが
らヒータ３で加熱する。温度調節は湯の温度を温度検出
手段５により検出し制御手段１でヒータ３をON−OFFし
一定の温度にして洗いおよびすすぎを行う。Next, the operation will be described. The water supply valve 2b is opened and the cleaning water is stored in the cleaning tank 6, and the water is heated by the heater 3 while stirring the water by the cleaning pump 2c. For temperature control, the temperature of hot water is detected by the temperature detection means 5, and the heater 3 is turned on and off by the control means 1 to a constant temperature for washing and rinsing.
次にすすぎ終了後、ヒータ３の断続運転を行い、洗浄
槽６内を暖める。温度調節は洗浄と同じく洗浄槽６内の
温度を温度検出手段５で検出し、制御手段１でヒータ３
をON−OFFし、所定温度以下で乾燥を行うものである。Next, after the rinsing is completed, the heater 3 is intermittently operated to warm the inside of the cleaning tank 6. For temperature adjustment, the temperature inside the cleaning tank 6 is detected by the temperature detecting means 5 as in the cleaning, and the heater 3 is controlled by the control means 1.
Is turned on and off, and drying is performed below a predetermined temperature.
また、温度検出手段５やヒータ駆動手段４等の故障で
ヒータ３が連続ONした場合の安全対策のため、ヒータ３
に直列に接続した温度ヒューズ７が異常温度に達すると
切断するようにしていた。In addition, as a safety measure when the heater 3 is continuously turned on due to a failure of the temperature detecting means 5, the heater driving means 4, etc., the heater 3
When the temperature fuse 7 connected in series to the abnormal temperature reaches an abnormal temperature, it is cut off.
発明が解決しようとする問題点 このような従来の構成では、温度検出手段５やヒータ
駆動手段４の故障時、ヒータが連続ONするため温度ヒュ
ーズが切断するまでは、高温となり、食器等が変形およ
び変色したり、食器洗い機の部品にも損傷を与える可能
性があるという問題点を有していた。Problems to be Solved by the Invention In such a conventional configuration, when the temperature detecting means 5 or the heater driving means 4 is out of order, the heater is continuously turned on, so that the temperature becomes high until the temperature fuse is cut, and the tableware or the like is deformed. In addition, it has a problem that it may be discolored and may damage the parts of the dishwasher.
本発明は上記問題点に鑑み、早期にヒータ動作不良を
検知し、食器あるいは食器洗い機への損傷を防止するこ
とを目的とする。In view of the above problems, it is an object of the present invention to detect defective heater operation early and prevent damage to dishes or dishwashers.
問題点を解決するための手段 上記目的を達成するために本発明は、洗浄槽内に配し
たヒータと、前記ヒータを動作させるヒータ駆動手段
と、前記ヒータのオン・オフ動作を検知するヒータ動作
検知手段と、前記ヒータ等の負荷への電源を入切する電
源スイッチと、前記電源スイッチをオフするスイッチ駆
動手段と、前記ヒータ駆動手段、スイッチ駆動手段を制
御する制御手段を備え、前記制御手段は、食器洗い機の
工程中に少なくとも１つ以上のヒータ異常検査工程を設
け、このヒータ異常検査工程において、ヒータ駆動手段
によるヒータ動作とヒータ動作検知手段からのヒータ動
作とが異なる場合に、ヒータ駆動手段によりヒータのオ
ン・オフ動作を制御した後、ヒータ駆動手段とヒータ動
作検知手段とのヒータ動作とを比較し、これら動作が複
数回連続して異なる場合にスイッチ駆動手段を動作させ
電源スイッチを切るようにしたものである。Means for Solving the Problems In order to achieve the above object, the present invention provides a heater arranged in a cleaning tank, a heater driving means for operating the heater, and a heater operation for detecting ON / OFF operation of the heater. The control means includes a detection means, a power switch for turning on / off a power supply to a load such as the heater, a switch driving means for turning off the power switch, and a control means for controlling the heater driving means and the switch driving means. Provides at least one heater abnormality inspection step during the dishwasher step, and in this heater abnormality inspection step, when the heater operation by the heater drive means and the heater operation from the heater operation detection means are different, the heater drive is performed. After controlling the on / off operation of the heater by the means, the heater operation of the heater driving means and the heater operation detecting means are compared, and these operations are compared. When the work is continuously different for a plurality of times, the switch driving means is operated to turn off the power switch.
作用 この構成によれば、ヒータの異常検査工程において、
制御手段がヒータを動作させる内容、すなわちヒータ駆
動手段の動作内容と、実際のヒータの動作内容、すなわ
ちヒータ動作検知手段の動作内容とを比較し、これら動
作が異なる場合に電源スイッチを切り、ヒータへの電力
供給を遮断する。よって、温度が異常温度まで上昇して
からヒータへの電力供給を停止する従来のものに比較
し、早期のうちにヒータ異常を判断できる。また、ヒー
タを複数回オン・オフさせ、複数回連続してヒータ駆動
手段とヒータ動作検知手段との動作内容が異なる場合
に、ヒータ異常と判断するので、その異常判定精度も向
上するとともに、一度、異常と判定した後にも、再度ヒ
ータをオン・オフ動作させるので、ヒータをリレー等で
オン・オフする場合には、多少の接点溶着を解消でき
る。Operation According to this configuration, in the heater abnormality inspection process,
The control means compares the operation of the heater, that is, the operation content of the heater driving means, with the actual operation content of the heater, that is, the operation content of the heater operation detection means. Shut off the power supply to the. Therefore, it is possible to judge the heater abnormality earlier than the conventional one in which the power supply to the heater is stopped after the temperature rises to the abnormal temperature. Further, when the heater is turned on / off a plurality of times and the operation contents of the heater driving means and the heater operation detecting means are different for a plurality of times in succession, it is determined that the heater is abnormal. Since the heater is turned on and off again after the abnormality is determined, when the heater is turned on and off by a relay or the like, some contact welding can be eliminated.
実 施 例 以下本発明の実施例を第１図および第２図により説明
する。なお図中前記従来例と同一部材には同一符号を付
し、その詳細説明は省略する。EXAMPLES Examples of the present invention will be described below with reference to FIGS. 1 and 2. In the figure, the same members as those in the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted.
図において、８は食器洗い機の電源を入切する電源ス
イッチで、このスイッチ８はスイッチ駆動手段９により
オフされる構成である。10はヒータの動作を検知するフ
ータ動作検知手段である。In the figure, 8 is a power switch for turning on and off the power of the dishwasher, and this switch 8 is configured to be turned off by a switch driving means 9. Reference numeral 10 is a footer operation detecting means for detecting the operation of the heater.
本発明の特徴はヒータの異常を検知し電源スイッチを
オフすることにある。この動作を第３図の要部フトーチ
ャートを用いて説明する。すなわち制御手段１はステッ
プ20で給水を始め、ステップ21でヒータ３の動作をヒー
タ動作検知手段10の信号で判断し動作してればステップ
32,33でヒータ駆動手段４をON−OFFし、ステップ34で再
度ヒータ３の動作を判断する。ヒータ３が動作しつづけ
ていればステップ35で一定回数以上（本実施例では８
回）ヒータ駆動手段４をON−OFFする。８回繰り返して
もヒータ３が動作しつづけていればスイッチ駆動手段９
を動作し電源スイッチ８をオフする。以上のステップ32
〜ステップ36が異常検査工程である。A feature of the present invention is to detect an abnormality of the heater and turn off the power switch. This operation will be described with reference to the main part chart of FIG. That is, the control means 1 starts water supply in step 20, and determines in step 21 the operation of the heater 3 based on the signal of the heater operation detection means 10 if the operation is completed.
At 32 and 33, the heater driving means 4 is turned on and off, and at step 34, the operation of the heater 3 is judged again. If the heater 3 continues to operate, at step 35 a certain number of times or more (8 in this embodiment).
Times) Turn on / off the heater driving means 4. If the heater 3 continues to operate even after repeating eight times, the switch driving means 9
And the power switch 8 is turned off. Step 32 above
~ Step 36 is an abnormality inspection process.
ステップ34でヒータ３が動作してなければ、ステップ
22で一定水位に達したか判断し、一定水位に達してなけ
ればステップ20,21,22を繰り返えす。ステップ22で一定
水位に達していれば、ステップ23で給水を停止する。上
記ステップ20〜23は給水工程であり、この工程ではヒー
タ３はOFF状態に制御するもので、ON状態であればヒー
タ３の異常となる。次に、ステップ24で水を撹拌し、ス
テップ25でヒータ駆動手段４を動作させヒータ３を加熱
する。ステップ26でヒータ３の動作を判断し、ヒータ３
が動作してなければ、ステップ37,38でヒータ駆動手段
４をON−OFFする。ステップ39でヒータ３の動作を判断
し再度動作してなければステップ40で一定回数（８回）
になるまで、ヒータ駆動手段４をON−OFFし、ステップ2
7以降ヒータ駆動手段４を動作させない。ステップ39で
ヒータ３が、動作すれば、ステップ27で一定温度に達し
たか判断し、達していなければステップ24,25,26,27を
繰り返えす。ステップ27で一定温度に達すればステップ
28でヒータ駆動手段４を停止する。If the heater 3 is not operating in step 34, step
At 22, it is judged whether or not the water level reaches a certain level, and if the water level has not reached a certain level, steps 20, 21, and 22 are repeated. If the water level reaches a certain level in step 22, water supply is stopped in step 23. The above steps 20 to 23 are a water supply process. In this process, the heater 3 is controlled in the OFF state, and if it is in the ON state, the heater 3 becomes abnormal. Next, in step 24, the water is stirred, and in step 25, the heater driving means 4 is operated to heat the heater 3. In step 26, the operation of the heater 3 is judged, and the heater 3
Is not operating, the heater driving means 4 is turned on and off in steps 37 and 38. In step 39, the operation of the heater 3 is judged, and if it is not operating again, in step 40 a certain number of times (8 times)
Heater driving means 4 is turned on and off until step 2
After that, the heater driving means 4 is not operated. If the heater 3 operates in step 39, it is determined in step 27 whether the constant temperature is reached, and if not, steps 24, 25, 26 and 27 are repeated. If a certain temperature is reached in step 27, step
At 28, the heater driving means 4 is stopped.
ステップ29でヒータ３の動作をヒータ動作検知手段10
の信号で判断し、ヒータ３が動作していれば、ステップ
32からステップ36を繰り返えす。ステップ29でヒータ３
が停止していれば、ステップ30で洗浄時間が経過したか
判断し洗浄時間が経過してなければ、ステップ23から30
を繰返えすステップ30で洗浄時間が経過すればステップ
31で撹拌を停止し次の工程へ移行する。In step 29, the operation of the heater 3 is detected by the heater operation detecting means 10
If the heater 3 is operating, the step
Repeat steps 32 to 36. Heater 3 in step 29
If the cleaning time has elapsed, determine whether the cleaning time has elapsed in step 30.
If the washing time elapses in step 30
The stirring is stopped at 31 and the process proceeds to the next step.
発明の効果 以上の実施例から明らかなような本発明によれば、ヒ
ータ動作の異常を検知し、異常の場合には電源スイッチ
を動作させるためヒータが異常で連続動作することを早
期に検知して防止することができ、食器や食器洗い機の
損傷を防止できる。また、ヒータを複数回オン・オフさ
せ、複数回連続してヒータ駆動手段とヒータ動作検知手
段との動作内容が異なる場合に、ヒータ異常と判断する
ので、その異常判定精度も向上するとともに、一度、異
常と判定した後にも、再度ヒータをオン・オフ動作させ
るので、ヒータをリレー等でオン・オフする場合には、
多少の接点溶着を解消できる。EFFECTS OF THE INVENTION According to the present invention as apparent from the above embodiments, it is possible to detect an abnormality in the heater operation, and in the case of an abnormality, to detect the heater continuously operating due to an abnormality because the power switch is operated. The damage to the dishes and dishwasher can be prevented. Further, when the heater is turned on / off a plurality of times and the operation contents of the heater driving means and the heater operation detecting means are different for a plurality of times in succession, it is determined that the heater is abnormal, so that the abnormality determination accuracy is improved and The heater is turned on and off again after it is determined to be abnormal, so when turning the heater on and off with a relay, etc.,
It can eliminate some contact welding.
第１図は本発明の実施例における食器洗い機の安全装置
を示すブロック図、第２図は同食器洗い機の概略構成
図、第３図は同制御動作を示す要部フローチャート、第
４図は従来の食器洗い機の安全装置を示すブロック図、
第５図は同概略構成図である。 １……制御手段、２……負荷、３……ヒータ、４……ヒ
ータ駆動手段、５……温度検知手段、６……洗浄槽、８
……電源スイッチ、９……スイッチ駆動手段、10……ヒ
ータ動作検知手段。FIG. 1 is a block diagram showing a safety device for a dishwasher according to an embodiment of the present invention, FIG. 2 is a schematic configuration diagram of the dishwasher, FIG. 3 is a main part flowchart showing the control operation, and FIG. Block diagram showing the safety device of the dishwasher of
FIG. 5 is a schematic configuration diagram of the same. 1 ... Control means, 2 ... Load, 3 ... Heater, 4 ... Heater driving means, 5 ... Temperature detecting means, 6 ... Cleaning tank, 8
...... Power switch, 9 ...... Switch drive means, 10 ...... Heater operation detection means.
Claims (1)
動作させるヒータ駆動手段と、前記ヒータのオン・オフ
動作を検知するヒータ動作検知手段と、前記ヒータ等の
負荷への電源を入切する電源スイッチと、前記電源スイ
ッチをオフするスイッチ駆動手段と、前記ヒータ駆動手
段、スイッチ駆動手段を制御する制御手段を備え、前記
制御手段は、食器洗い機の工程中に少なくとも１つ以上
のヒータ異常検査工程を設け、このヒータ異常検査工程
において、ヒータ駆動手段によるヒータ動作とヒータ動
作検知手段からのヒータ動作とが異なる場合に、ヒータ
駆動手段によりヒータのオン・オフ動作を制御した後、
ヒータ駆動手段とヒータ動作検知手段とのヒータ動作と
を比較し、これら動作が複数回連続して異なる場合にス
イッチ駆動手段を動作させ電源スイッチを切る食器洗い
機の安全装置。1. A heater arranged in a cleaning tank, a heater driving means for operating the heater, a heater operation detecting means for detecting ON / OFF operation of the heater, and a power source for a load such as the heater. A power switch for turning off, a switch driving means for turning off the power switch, a control means for controlling the heater driving means and the switch driving means are provided, and the control means includes at least one heater during the process of the dishwasher. An abnormality inspection step is provided, and in this heater abnormality inspection step, when the heater operation by the heater drive means and the heater operation from the heater operation detection means are different, after controlling the heater on / off operation by the heater drive means,
A safety device for a dishwasher that compares the heater operation of the heater drive means with the heater operation of the heater operation detection means, and operates the switch drive means to turn off the power switch when these operations are successively different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62328562A JP2523737B2 (en) | 1987-12-24 | 1987-12-24 | Dishwasher safety device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62328562A JP2523737B2 (en) | 1987-12-24 | 1987-12-24 | Dishwasher safety device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01166738A JPH01166738A (en) | 1989-06-30 |
| JP2523737B2 true JP2523737B2 (en) | 1996-08-14 |
Family
ID=18211661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62328562A Expired - Lifetime JP2523737B2 (en) | 1987-12-24 | 1987-12-24 | Dishwasher safety device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2523737B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6472721A (en) * | 1987-09-14 | 1989-03-17 | Toshiba Corp | Dish washer |
-
1987
- 1987-12-24 JP JP62328562A patent/JP2523737B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01166738A (en) | 1989-06-30 |
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