JPH05111452A - Tableware washer - Google Patents

Abstract

PURPOSE:To improve the washing performance by executing washing against dirt and the kind of tableware at an optimal hot water temperature, making a hot water temperature high at the time of rinsing and quickening drying. CONSTITUTION:When tableware 7 is being washed, a detecting means 13 detects turbidity of mixing hot water. A control means 29 predicts a dirt component of the tableware by a value of a signal of the detecting means 13 or its time variation value and controls a mixing valve 22 so as to supply mixing hot water of a temperature being suitable for dirt to a washing means 14.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、最適な湯温で食器を洗
浄する食器洗浄機に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dishwasher for washing dishes at an optimum hot water temperature.

【０００２】[0002]

【従来の技術】従来の食器洗浄装置は図３に示すような
ものであった。（例えば特開昭６０−１６８４２８号公
報）図３において、洗浄槽１の上方に設けられた給水電
磁弁２より温水を給水し、一定量給水されると給水水位
を感圧スイッチ３で検知して給水を停止させるとともに
洗浄ポンプ４が起動し洗浄水を加圧、循環させてノズル
５より洗浄水を噴射し、食器籠６に設置した食器７を予
洗する。予洗が終了した後、洗浄ポンプ４が停止すると
ともに排水ポンプ８が運転を開始し、洗浄水を機外に排
水する。排水後、再び給水し予洗工程と同様の動作によ
り本洗いを行なう。なお本洗い工程においては一般の洗
剤が自動的に投入されるようになっている。本洗い工程
が終了した後、予洗、本洗いと同様の動作によりすすぎ
洗いを行い一連の工程を終了する。給水電磁弁２と給湯
機は給水管９にて結合されている。2. Description of the Related Art A conventional dishwasher is shown in FIG. (For example, Japanese Patent Laid-Open No. 60-168428) In FIG. 3, hot water is supplied from a water supply solenoid valve 2 provided above the cleaning tank 1, and when a fixed amount of water is supplied, the water level is detected by the pressure sensitive switch 3. Then, the water supply is stopped and the washing pump 4 is activated to pressurize and circulate the washing water to spray the washing water from the nozzle 5 to prewash the dishes 7 set in the dish basket 6. After the pre-washing is completed, the washing pump 4 is stopped and the drainage pump 8 is started to drain the washing water out of the machine. After draining water, supply water again and perform main washing by the same operation as in the pre-washing process. In the main washing process, general detergent is automatically added. After the main washing step is completed, rinsing is performed by the same operation as the pre-washing and the main washing, and the series of steps is finished. The water supply solenoid valve 2 and the water heater are connected by a water supply pipe 9.

【０００３】[0003]

【発明が解決しようとする課題】しかしながら上記のよ
うな構成では、低温の水で洗浄しても十分な洗浄性能は
得られないし、また最初から高温の湯で洗浄すると食器
に付着している汚れ分のたんぱく質等が固着することが
ある。さらに高温の混合湯で洗浄すると食器自体が熱に
より変色、変形等を生じることがある。However, with the above-mentioned structure, even if it is washed with low temperature water, sufficient cleaning performance cannot be obtained, and if it is washed with high temperature hot water from the beginning, stains adhered to the dishes Protein, etc. may be fixed. If washed with hot water of higher temperature, the tableware itself may be discolored or deformed due to heat.

【０００４】本発明はかかる従来の課題を解消するもの
で、洗浄に使用した湯の物理量により供給する湯温を変
化し洗浄性能を向上することを第１の目的とする。The present invention solves the above-mentioned conventional problems, and its first object is to improve the cleaning performance by changing the temperature of the supplied hot water according to the physical quantity of the hot water used for cleaning.

【０００５】第２の目的は食器の種類に応じて供給する
湯温の上限値を設定し食器の保護を行なうことにある。A second object is to protect the tableware by setting the upper limit of the temperature of the hot water supplied according to the type of the tableware.

【０００６】[0006]

【課題を解決するための手段】上記課題を解決するため
に本発明の食器洗浄装置は、湯を供給する給湯手段と、
前記給湯手段の湯温を検出する湯温検出手段と、前記給
湯手段の湯温を調節する制御手段と、前記給湯手段の湯
を用いて食器を洗浄する洗浄手段と、前記洗浄手段の下
流において湯を排水する排水手段と、前記排水手段内の
湯の物理量を検出する検出手段とを有し、前記制御手段
は前記検出手段の信号または信号の時間変化により前記
給湯手段の湯温を調節する機能を有する構成としたもの
である。In order to solve the above problems, the dishwashing apparatus of the present invention comprises hot water supply means for supplying hot water,
Hot water temperature detecting means for detecting the hot water temperature of the hot water supplying means, control means for adjusting the hot water temperature of the hot water supplying means, washing means for washing dishes with hot water of the hot water supplying means, and downstream of the washing means. It has drainage means for draining hot water and detection means for detecting a physical quantity of hot water in the drainage means, and the control means adjusts the hot water temperature of the hot water supply means by a signal of the detection means or a time change of the signal. It is configured to have a function.

【０００７】また、上記課題を解決するために本発明の
食器洗浄装置は、湯を供給する給湯手段と、前記給湯手
段の湯温を検出する湯温検出手段と、前記給湯手段の湯
温を調節する制御手段と、前記給湯手段の湯を用いて食
器を洗浄する洗浄手段と、前記洗浄手段の下流において
湯を排水する排水手段と、前記排水手段内の湯の物理量
を検出する検出手段と、前記給湯手段の湯温を設定する
設定手段を有し、前記制御手段は前記検出手段の信号ま
たは信号の時間変化と前記設定手段の信号により前記給
湯手段の湯温を調節する機能を有する構成としたもので
ある。In order to solve the above problems, the dishwashing apparatus of the present invention provides hot water supply means for supplying hot water, hot water temperature detection means for detecting the hot water temperature of the hot water supply means, and hot water temperature of the hot water supply means. Control means for adjusting, washing means for washing dishes with hot water of the hot water supply means, draining means for draining hot water downstream of the washing means, and detecting means for detecting a physical quantity of hot water in the draining means A configuration having a setting means for setting the hot water temperature of the hot water supplying means, and the control means having a function of adjusting the hot water temperature of the hot water supplying means by the signal of the detecting means or the time change of the signal and the signal of the setting means. It is what

【０００８】[0008]

【作用】以上の構成により、供給湯温を調整して食器の
洗浄を行なう。With the above construction, the temperature of the supplied hot water is adjusted to wash the dishes.

【０００９】[0009]

【実施例】以下、本発明の一実施例を図面を用いて説明
する。なお、図１は食器洗浄装置の断面図で図３と同一
部品については同一符号を付して詳細な説明は省略し、
異なる部分を中心に説明する。洗浄槽１から給水電磁弁
２、感圧スイッチ３、洗浄ポンプ４、ノズル５、食器籠
６、排水ポンプ８までをここでは洗浄手段１４とする。
さらに、給湯手段として湯と水を混合して適温湯をつく
る混合弁を例に説明する。２０は湯流路、２１は水流路
であり、各流路に関連して混合弁２２が設けられてい
る。混合弁２２は混合弁駆動手段２３によって湯水の混
合比を変化し湯温を調節する。また混合弁２２の下流に
流量調節開閉弁２４を設け、この流量調節開閉弁２４は
流量調節開閉弁駆動手段２５により付勢する。混合弁２
２の下流において湯水が混合する混合湯流路２６の温度
は湯温検出手段２７によって検出され、設定手段２８の
値に一致させるべく制御手段２９が混合弁駆動手段２３
と流量調節開閉弁駆動手段２５に制御信号を送出する。
排水ポンプ８の上流には洗浄に使用する混合湯の物理量
を検出する検出手段１３を設けている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 is a cross-sectional view of the dishwasher, the same parts as those in FIG. 3 are designated by the same reference numerals, and detailed description thereof will be omitted.
The different parts will be mainly described. Here, the cleaning tank 1 to the solenoid valve 2, the pressure sensitive switch 3, the cleaning pump 4, the nozzle 5, the dish basket 6, and the drainage pump 8 are cleaning means 14.
Further, as a hot water supply means, a mixing valve for mixing hot water and water to produce hot water of appropriate temperature will be described as an example. Reference numeral 20 is a hot water flow path, 21 is a water flow path, and a mixing valve 22 is provided in association with each flow path. The mixing valve 22 changes the mixing ratio of hot and cold water by the mixing valve drive means 23 to adjust the hot water temperature. Further, a flow rate adjusting on-off valve 24 is provided downstream of the mixing valve 22, and the flow rate adjusting on-off valve 24 is energized by a flow rate adjusting on-off valve driving means 25. Mixing valve 2
The temperature of the mixed hot water flow path 26 where hot and cold water is mixed downstream of 2 is detected by the hot water temperature detecting means 27, and the control means 29 causes the mixing valve driving means 23 to match the value of the setting means 28.
And a control signal is sent to the flow rate adjusting on-off valve driving means 25.
A detection means 13 for detecting the physical quantity of the mixed hot water used for cleaning is provided upstream of the drainage pump 8.

【００１０】図２は制御手段２９の例である。３０は混
合湯温検出手段２７と検出手段１３の信号により混合弁
２２の駆動量を演算する混合弁制御手段、３１は混合弁
制御手段３０の信号により混合弁駆動手段２３の駆動量
を設定する第１の駆動量設定手段である。３２は設定手
段２８と検出手段１３の信号により流量調節開閉弁駆動
手段２５の駆動量を演算する流量調節開閉弁制御手段、
３３は流量調節開閉弁制御手段３２の信号により流量調
節開閉弁駆動手段２５の駆動量を設定する第２の駆動量
設定手段である。FIG. 2 shows an example of the control means 29. Reference numeral 30 is a mixing valve control means for calculating the driving amount of the mixing valve 22 based on the signals of the mixing hot water temperature detecting means 27 and the detecting means 13, and 31 is a setting of the driving amount of the mixing valve driving means 23 according to the signal of the mixing valve control means 30. It is a first drive amount setting means. Reference numeral 32 is a flow rate control on-off valve control means for calculating the drive amount of the flow rate control on-off valve drive means 25 based on signals from the setting means 28 and the detection means 13,
Reference numeral 33 is a second drive amount setting means for setting the drive amount of the flow rate adjusting on-off valve driving means 25 by the signal of the flow rate adjusting on-off valve control means 32.

【００１１】次に本発明の構成の動作を説明する。通
常、洗浄の最初は水もしくはぬるま湯で予備洗を行な
う。この時制御手段２９は混合弁駆動手段２３に信号を
出し混合弁２２はほぼ水が全開の位置になるようにす
る。混合湯温は湯温検出手段２７により検出し、この信
号により湯温が高くならないよう制御手段２９は混合弁
２２を制御している。洗浄中は洗浄手段１４に設けた検
出手段１３により混合湯の物理量を検出している。ここ
では物理量として混合湯の濁り度合を調べる例を説明す
る。（例えば発光手段と受光手段を組合せ光の透過率に
より濁度を検出するもの等）予備洗を始めてから検出手
段１３の信号の変化を制御手段はモニタしている。すぐ
に濁度が上昇した場合は汚れがひどいものとして予備洗
いの時間もしくは回数を増す。洗浄中、濁度がゆっくり
と増加する場合は油汚れがあるものとし本洗いの時に制
御手段２９は混合弁２２を動作し混合湯温を高くする。
混合湯温検出手段２７の信号により油汚れを洗浄するの
に適した温度になるよう制御手段２９は混合弁２２の位
置を調節する。さらに予備洗において検出手段１３の信
号が一定しない場合、混合湯に固形物が多量に混入した
ものとし、食器７にたんぱく質等が付着している可能性
が高い。この場合、本洗いにおいて前述の油汚れと同様
な高温の混合湯を洗浄手段１４に供給すると、この高温
湯によりたんぱく質等が食器７に固着する恐れがある。
したがって制御手段２９は油汚れの場合より低温でたん
ぱく質等が凝固しない温度になるよう混合湯温検出手段
２７の信号により混合弁２２の位置を調節する。このよ
うに検出手段１３の信号の値とその時間変化により汚れ
の種類を推測し本洗いの湯温を調整することにより洗浄
性能を向上することが可能である。またすすぎ洗いにお
いては混合湯温を高くすると食器７の乾燥を早くするこ
とができる。Next, the operation of the configuration of the present invention will be described. Usually, at the beginning of washing, preliminary washing with water or lukewarm water is performed. At this time, the control means 29 outputs a signal to the mixing valve driving means 23 so that the mixing valve 22 will be in a position where water is almost fully opened. The mixed hot water temperature is detected by the hot water temperature detecting means 27, and the control means 29 controls the mixing valve 22 by this signal so that the hot water temperature does not rise. During the cleaning, the detection means 13 provided in the cleaning means 14 detects the physical quantity of the mixed hot water. Here, an example of checking the turbidity of the mixed hot water as a physical quantity will be described. (For example, a combination of a light emitting means and a light receiving means for detecting turbidity based on the transmittance of light.) The control means monitors changes in the signal of the detecting means 13 after starting the preliminary washing. If the turbidity immediately rises, the stain is severe and the time or number of prewashes is increased. If the turbidity slowly increases during cleaning, it is assumed that there is oil stain, and during the main cleaning, the control means 29 operates the mixing valve 22 to raise the temperature of the mixed hot water.
The control means 29 adjusts the position of the mixing valve 22 so that the temperature becomes suitable for cleaning oil stains by the signal of the mixed hot water temperature detecting means 27. Further, when the signal of the detecting means 13 is not constant in the preliminary washing, it is assumed that a large amount of solid matter is mixed in the mixed hot water, and there is a high possibility that proteins and the like adhere to the tableware 7. In this case, when hot water similar to the above-mentioned oil stain is supplied to the cleaning means 14 in the main washing, the hot water may cause proteins and the like to adhere to the dishes 7.
Therefore, the control means 29 adjusts the position of the mixing valve 22 by the signal of the mixing hot water temperature detecting means 27 so that the temperature is lower than that in the case of oil stain and the proteins and the like are not solidified. In this way, it is possible to improve the cleaning performance by estimating the type of dirt from the value of the signal of the detection means 13 and its change over time and adjusting the hot water temperature of the main wash. Further, in the rinsing, the tableware 7 can be dried more quickly by raising the temperature of the mixed hot water.

【００１２】次に本発明の他の実施例について説明す
る。家庭で使用する食器も陶器や磁器等のように洗浄温
度があまり影響しないものから最近は高温に耐えられな
い合成樹脂等により成型されたものが増加してきた。こ
のため洗浄する際、上記実施例のように油汚れのため高
温湯を使用すると単純に決められない場合がある。そこ
で、設定手段２８に混合湯温の上限を設定する機能を設
ける。これにより検出手段１３の信号だけでなく設定手
段２８の温度上限を考慮して混合弁制御手段３０は混合
湯の温度を制御する。例えば７０℃が上限の樹脂製の食
器等を洗浄する場合は設定手段２８であらかじめ混合湯
温が７０℃を越えないように設定しておけば安心して洗
浄を行なうことができる。このように設定手段２８で食
器の種類に応じて混合湯の上限温度を設定することによ
り食器の保護を行なうことができる。Next, another embodiment of the present invention will be described. Tableware used at home, such as pottery and porcelain, is not affected by the washing temperature so much, and recently, those made of synthetic resin or the like that cannot withstand high temperatures have increased. For this reason, when cleaning, it may not be possible to simply determine if high-temperature hot water is used due to oil stains as in the above embodiment. Therefore, the setting means 28 is provided with a function for setting the upper limit of the mixed hot water temperature. As a result, the mixing valve control means 30 controls the temperature of the mixed hot water in consideration of not only the signal of the detection means 13 but also the temperature upper limit of the setting means 28. For example, when washing tableware made of resin having an upper limit of 70 ° C., if the temperature of the mixed hot water is set in advance by the setting means 28 so as not to exceed 70 ° C., the washing can be carried out with peace of mind. In this way, the setting means 28 sets the upper limit temperature of the mixed hot water according to the type of tableware, so that the tableware can be protected.

【００１３】上記実施例では検出手段１３として混合湯
の濁度を検出するようにしたが、他の物理量を用いても
よい。例えばｐＨ値を検出して汚れの種類を判別するこ
とも可能である。Although the turbidity of the mixed hot water is detected as the detecting means 13 in the above embodiment, other physical quantities may be used. For example, the pH value can be detected to determine the type of stain.

【００１４】[0014]

【発明の効果】以上のように本発明の食器洗浄装置によ
れば、次の効果が得られる。 （１）食器の汚れの種類を検出手段の信号により推定
し、汚れの種類に適した湯温で洗浄を行なうため洗浄性
能を向上することができる。またすすぎ洗いにおいては
湯温を高くし食器の乾燥を早くすることができる。 （２）食器の種類に応じて洗浄に用いる湯の上限温度を
設定することができるため食器の熱変形や変色を防ぎ安
心して洗浄を行なうことができる。そして食器の保護を
行なうことができる。As described above, according to the dishwasher of the present invention, the following effects can be obtained. (1) Since the type of stains on tableware is estimated from the signal of the detection means and washing is performed at a hot water temperature suitable for the type of stains, the washing performance can be improved. Also, in rinsing, the hot water temperature can be raised to speed up the drying of the dishes. (2) Since the upper limit temperature of hot water used for washing can be set according to the type of tableware, thermal deformation and discoloration of the tableware can be prevented, and washing can be performed with peace of mind. And the tableware can be protected.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の食器洗浄装置の一実施例を示す断面図FIG. 1 is a sectional view showing an embodiment of a dishwashing apparatus of the present invention.

【図２】同食器洗浄装置の制御ブロック図FIG. 2 is a control block diagram of the dishwasher.

【図３】従来の食器洗浄装置の断面図FIG. 3 is a sectional view of a conventional dishwasher.

【符号の説明】[Explanation of symbols]

１３ 検出手段 １４ 洗浄手段 ２２ 混合弁 ２３ 混合弁駆動手段 ２８ 設定手段 ２９ 制御手段 13 detection means 14 cleaning means 22 mixing valve 23 mixing valve drive means 28 setting means 29 control means

───────────────────────────────────────────────────── フロントページの続き (72)発明者 城戸内 康夫 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuo Kidouchi 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】湯を供給する給湯手段と、前記給湯手段の
湯温を検出する湯温検出手段と、前記給湯手段の湯温を
調節する制御手段と、前記給湯手段の湯を用いて食器を
洗浄する洗浄手段と、前記洗浄手段の下流において湯を
排水する排水手段と、前記排水手段内の湯の物理量を検
出する検出手段とを有し、前記制御手段は前記検出手段
の信号または信号の時間変化により前記給湯手段の湯温
を調節する機能を有する食器洗浄装置。1. Hot water supply means for supplying hot water, hot water temperature detection means for detecting the hot water temperature of the hot water supply means, control means for adjusting the hot water temperature of the hot water supply means, and tableware using the hot water of the hot water supply means A washing means for washing water, a draining means for draining hot water downstream of the washing means, and a detecting means for detecting a physical quantity of the hot water in the draining means, wherein the control means is a signal or a signal of the detecting means. The dishwashing device having a function of adjusting the hot water temperature of the hot water supply means according to the change with time. 【請求項２】湯を供給する給湯手段と、前記給湯手段の
湯温を検出する湯温検出手段と、前記給湯手段の湯温を
調節する制御手段と、前記給湯手段の湯を用いて食器を
洗浄する洗浄手段と、前記洗浄手段の下流において湯を
排水する排水手段と、前記排水手段内の湯の物理量を検
出する検出手段と、前記給湯手段の湯温を設定する設定
手段を有し、前記制御手段は前記検出手段の信号または
信号の時間変化と前記設定手段の信号により前記給湯手
段の湯温を調節する機能を有する食器洗浄装置。2. Hot water supply means for supplying hot water, hot water temperature detection means for detecting the hot water temperature of said hot water supply means, control means for adjusting the hot water temperature of said hot water supply means, and tableware using the hot water of said hot water supply means A washing means for washing water, a draining means for draining hot water downstream of the washing means, a detecting means for detecting a physical quantity of hot water in the draining means, and a setting means for setting the hot water temperature of the hot water supplying means. The dishwashing apparatus is characterized in that the control means has a function of adjusting the temperature of the hot water supply means by the signal of the detection means or the time change of the signal and the signal of the setting means.