JP2014121876A - Device which monitors temperature of led/uv dryer - Google Patents

Device which monitors temperature of led/uv dryer Download PDF

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JP2014121876A
JP2014121876A JP2013263713A JP2013263713A JP2014121876A JP 2014121876 A JP2014121876 A JP 2014121876A JP 2013263713 A JP2013263713 A JP 2013263713A JP 2013263713 A JP2013263713 A JP 2013263713A JP 2014121876 A JP2014121876 A JP 2014121876A
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cover
led
dryer
temperature
dirt
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JP6168983B2 (en
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Tobias Dr Mueller
ミュラー トビアス
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Heidelberger Druckmaschinen AG
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Heidelberger Druckmaschinen AG
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F23/00—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing
    • B41F23/04—Devices for treating the surfaces of sheets, webs, or other articles in connection with printing by heat drying, by cooling, by applying powders
    • B41F23/044—Drying sheets, e.g. between two printing stations
    • B41F23/045—Drying sheets, e.g. between two printing stations by radiation
    • B41F23/0453—Drying sheets, e.g. between two printing stations by radiation by ultraviolet dryers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
    • B41J11/0021—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation
    • B41J11/00214—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation using UV radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/0015—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form for treating before, during or after printing or for uniform coating or laminating the copy material before or after printing
    • B41J11/002—Curing or drying the ink on the copy materials, e.g. by heating or irradiating
    • B41J11/0021—Curing or drying the ink on the copy materials, e.g. by heating or irradiating using irradiation
    • B41J11/00218—Constructional details of the irradiation means, e.g. radiation source attached to reciprocating print head assembly or shutter means provided on the radiation source

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Supply, Installation And Extraction Of Printed Sheets Or Plates (AREA)
  • Ink Jet (AREA)
  • Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a method and a device which make it possible to recognize the contamination having reached a predetermined contamination level.SOLUTION: A device for curing UV ink or coating includes a plurality of LED assemblies, wherein the plurality of LEDs radiates UV light and is disposed in a housing, and an exit window of the housing includes a UV light beam-transmissive cover. The device is provided with at least one sensor 26, 27 for checking the temperature of the transmissive cover 24.

Description

本発明は、ＬＥＤ・ＵＶ乾燥機の温度を監視する装置に関する。   The present invention relates to an apparatus for monitoring the temperature of an LED / UV dryer.

ＬＥＤ・ＵＶ乾燥機は、例えば、ＵＶインキ又は塗料を硬化するために、シート、又は金属製もしくはプラスチック製の三次元的な構成要素に単色又は多色の印刷又は文字入れを行うためのインクジェットプリンタや輪転印刷機にも使用される。   LED / UV dryers, for example, inkjet printers for single-color or multi-color printing or lettering on sheets or metal or plastic three-dimensional components to cure UV inks or paints It is also used for rotary presses.

独国特許出願公開第１０２００９００７８７３号明細書において、例えば印刷機においてＵＶ光硬化可能なインキを硬化するためのＬＥＤ乾燥機が公知である。このＬＥＤ乾燥機では、被印刷物の搬送方向に対して横向きに複数の列を成して幾つかのＬＥＤが支持体に配置されている。   German Offenlegungsschrift 10 2009007873 discloses an LED dryer for curing UV-curable inks, for example in a printing press. In this LED dryer, several LEDs are arranged on a support in a plurality of rows in a direction transverse to the conveyance direction of the substrate.

国際公開第２０１１／０３１５２９号において、汚れ及び破損に対して防護するために複数のＬＥＤをハウジング、つまりＬＥＤ・ＵＶモジュール内に配置して、ハウジングに、出射するＵＶ光線の領域に透過性のカバーを設けることが公知である。   In International Publication No. 2011/031529, a plurality of LEDs are arranged in a housing, that is, an LED / UV module, to protect against dirt and breakage, and the housing is transmissive to the region of the emitted UV light. Is known.

実地において、透過性のカバーが、例えば塵埃、蒸気又はインキミストにより汚される問題が生じる。このような汚れは、ＵＶ光の吸収を招き、ひいては透過性のカバーの加熱のばらつきを招く。これにより、一方では光線強度の弱化が生じ、他方では加熱のばらつきによるストレスクラックに基づく透過性のカバーの破損が生じる。   In practice, the problem arises that the permeable cover is soiled, for example by dust, vapor or ink mist. Such dirt causes absorption of UV light, which in turn causes variation in heating of the transmissive cover. This causes weakening of the light intensity on the one hand and breakage of the permeable cover due to stress cracks due to variations in heating on the other hand.

独国特許出願公開第１０２００９００７８７３号明細書German Patent Application Publication No. 102009007873 国際公開第２０１１／０３１５２９号International Publication No. 2011/031529

したがって本発明の課題は、所定の汚れ度合いに達した汚れが認識可能である方法及び装置を提供することである。   Accordingly, an object of the present invention is to provide a method and apparatus capable of recognizing dirt that has reached a predetermined degree of dirt.

この課題を解決するための本発明の装置によれば、複数のＬＥＤのアセンブリを備え、複数のＬＥＤは、ＵＶ光を放射するものであり、かつハウジング内に配置されており、ハウジングの出射窓は、ＵＶ光線透過性のカバーを有する、ＵＶインキ又は塗料を硬化する装置であって、透過性のカバーの温度を把握するための少なくとも１つのセンサが設けられている。   According to an apparatus of the present invention for solving this problem, the apparatus includes an assembly of a plurality of LEDs, and the plurality of LEDs emit UV light and are disposed in the housing. Is a device for curing UV ink or paint having a UV light transmissive cover, and is provided with at least one sensor for determining the temperature of the transmissive cover.

好適には、透過性のカバーの温度差を把握するための、相互に間隔を置いて配置された少なくとも２つの温度センサが設けられている。   Preferably, at least two temperature sensors are provided that are spaced apart from each other for determining the temperature difference of the permeable cover.

好適には、温度センサは、目標値・実際値比較を実行するための評価ユニットに接続されている。   The temperature sensor is preferably connected to an evaluation unit for performing a target value / actual value comparison.

好適には、温度センサは、透過性のカバーに接触して配置されている。   Preferably, the temperature sensor is placed in contact with the permeable cover.

好適には、温度センサは、非接触式に測定するように、透過性のカバーから間隔を置いて配置されている。   Preferably, the temperature sensor is spaced from the permeable cover for non-contact measurement.

好適には、複数のＬＥＤと透過性のカバーとの間の光線路に、ＵＶ光線を集束するための第１の光学系及び第２の光学系が配置されている。   Preferably, a first optical system and a second optical system for focusing the UV light are disposed in an optical path between the plurality of LEDs and the transmissive cover.

ＬＥＤ・ＵＶ乾燥機を備える枚葉輪転印刷機が好適である。   A sheet-fed rotary printing press equipped with an LED / UV dryer is suitable.

ＬＥＤ・ＵＶ乾燥機を備えるインクジェットプリンタが好適である。   An ink jet printer provided with an LED / UV dryer is suitable.

この課題を解決するための本発明の方法によれば、ＬＥＤ・ＵＶ乾燥機の透過性のカバーの汚れを認識する方法であって、相互に間隔を置いて配置された少なくとも２つのセンサが、カバーの温度を、カバーに接触することにより又は非接触式に測定し、温度測定値を評価ユニットに供給し、そのあとで所定の値との目標値・実際値比較を実行し、所定の値からのずれが生じると、汚れを表示する信号を出力する。   According to the method of the present invention for solving this problem, there is provided a method for recognizing dirt on a transparent cover of an LED / UV dryer, wherein at least two sensors arranged at a distance from each other, The temperature of the cover is measured by contact with the cover or in a non-contact manner, the temperature measurement value is supplied to the evaluation unit, and then the target value / actual value comparison with the predetermined value is performed. When a deviation from is generated, a signal indicating dirt is output.

この課題を解決するための本発明の方法によれば、ＬＥＤ・ＵＶ乾燥機の透過性のカバーの汚れを認識する方法であって、相互に間隔を置いて配置された少なくとも２つのセンサが、カバーの温度を、カバーに接触することにより又は非接触式に測定し、温度測定値を評価ユニットに供給し、そのあとで所定の値との目標値・実際値比較を実行し、より大きなずれが生じると、ＬＥＤ・ＵＶ乾燥機のオフを行う。   According to the method of the present invention for solving this problem, there is provided a method for recognizing dirt on a transparent cover of an LED / UV dryer, wherein at least two sensors arranged at a distance from each other, The temperature of the cover is measured by touching the cover or in a non-contact manner, the temperature measurement value is supplied to the evaluation unit, and then the target value / actual value comparison with a predetermined value is performed, resulting in a larger deviation. If this occurs, the LED / UV dryer is turned off.

本発明の格別な利点は、ＬＥＤの照射範囲における透過性のカバーの加熱が検知可能であることにある。なぜならば、ＵＶ光が「低温」であるにもかかわらず、透過性のカバー上の汚れが、ＵＶ光の吸収を招き、ひいては温度上昇、特にカバーの様々な位置の間で温度差を招くからである。温度の検知又は把握により、一方では汚れの度合いを特定することができ、他方では温度差に基づくカバー、例えばガラス板の破損を回避することができる。   A particular advantage of the present invention is that the heating of the transparent cover in the illumination range of the LED can be detected. This is because even though the UV light is “cold”, dirt on the transmissive cover can cause absorption of the UV light and thus increase the temperature, especially between the various positions of the cover. It is. By detecting or grasping the temperature, on the one hand, it is possible to specify the degree of contamination, and on the other hand, it is possible to avoid breakage of a cover, for example a glass plate, based on the temperature difference.

温度差を特定するために、相互に間隔を置いて配置された少なくとも２つの温度センサが、カバーの温度を把握し、その情報を評価ユニットに伝送する。評価ユニットは、目標値−実際値比較に基づいて、カバーをクリーニングするための相応の信号を出力し、第２のステップで、ＬＥＤをオフするための信号を出力する。   In order to identify the temperature difference, at least two temperature sensors arranged at a distance from each other grasp the temperature of the cover and transmit this information to the evaluation unit. The evaluation unit outputs a corresponding signal for cleaning the cover based on the target value-actual value comparison, and outputs a signal for turning off the LED in the second step.

温度センサは、カバーに直に配置するか、又は非接触式に測定するためにＬＥＤとカバーとの間の空間内でカバーから間隔を置いて配置してよい。   The temperature sensor may be placed directly on the cover or spaced from the cover in the space between the LED and the cover for non-contact measurement.

枚葉輪転印刷機の概略断面図である。It is a schematic sectional drawing of a sheet-fed rotary printing press. ＬＥＤ・ＵＶ乾燥機の概略断面図である。It is a schematic sectional drawing of LED * UV dryer. 別のＬＥＤ・ＵＶ乾燥機の概略断面図である。It is a schematic sectional drawing of another LED * UV dryer. 図３のＬＥＤ・ＵＶ乾燥機のＬＥＤ列の平面図である。It is a top view of LED row | line | column of the LED * UV dryer of FIG.

次に本発明の実施の形態を、図示の２つの態様につき詳説する。   Next, an embodiment of the present invention will be described in detail with respect to the two illustrated modes.

シート７を処理する機械、例えば印刷機１は、フィーダ２と少なくとも１つの印刷ユニット３，４とデリバリ６とを備える。シート７は、パイル８から取り出されて、個別化されるか又はさしみ状にずれ重なった状態でフィーダボード９を介して印刷ユニット３，４に供給される。印刷ユニット３，４は、公知の形で、それぞれ１本の版胴１１，１２を備える。版胴１１，１２は、それぞれ柔軟な刷版を固定する装置を備える。更に各版胴１１，１２に対応して、半自動又は全自動式の刷版交換のための装置が配置されている。   A machine for processing the sheet 7, for example a printing machine 1, comprises a feeder 2, at least one printing unit 3, 4 and a delivery 6. The sheet 7 is taken out from the pile 8 and supplied to the printing units 3 and 4 through the feeder board 9 in a state of being separated or being scissed and overlapped. The printing units 3 and 4 are each provided with a plate cylinder 11 and 12 in a known form. Each of the plate cylinders 11 and 12 includes a device for fixing a flexible printing plate. Further, corresponding to each of the plate cylinders 11 and 12, a semi-automatic or fully automatic printing plate changing device is arranged.

パイル８は、制御して昇降可能な主紙積み台１０を備える。シート７の取出しは、パイル８の上側からいわゆるサクションヘッド１３を用いて行われ、サクションヘッド１３は、とりわけ、シート７を個別化するための幾つかの持上げサッカと運び出しサッカとを備える。更に上側のシート層をさばくための吹出し装置及びパイルを後方で案内するための接触要素が設けられている。パイル８、特にパイル８の上側のシート７を揃えるために、幾つかの側方及び後方のストッパが設けられている。   The pile 8 includes a main paper stacking table 10 that can be controlled to move up and down. The sheet 7 is taken out from above the pile 8 by means of a so-called suction head 13 which comprises, inter alia, several lifting and unloading suckers for individualizing the sheet 7. In addition, a blow-out device for separating the upper sheet layer and a contact element for guiding the pile behind are provided. In order to align the pile 8, in particular the upper sheet 7 of the pile 8, several lateral and rear stops are provided.

ＵＶ硬化性のインキで印刷を行う際に、被印刷物、例えばシート、金属製もしくはプラスチック製のフォイル等へのインキの転写箇所の下流側にＬＥＤ・ＵＶ乾燥機１４が設けられている。この場合、被印刷物は、シート状に構成されていても、三次元的に構成されていてもよい。ＬＥＤ・ＵＶ乾燥機１４は、印刷されたばかりの印刷像への照射により、インキの硬化を促進する。もちろん印刷像は、インクジェットプリンタにより形成してもよい。   When printing with UV curable ink, an LED / UV dryer 14 is provided on the downstream side of the transfer position of the ink to a substrate, for example, a sheet, a metal or plastic foil, or the like. In this case, the substrate to be printed may be configured in a sheet shape or may be configured in a three-dimensional manner. The LED / UV dryer 14 accelerates the curing of the ink by irradiating the printed image just printed. Of course, the printed image may be formed by an ink jet printer.

図１による態様では、枚葉輪転印刷機１は、幾つかのＬＥＤ・ＵＶ乾燥機１４を備える。ＬＥＤ・ＵＶ乾燥機１４は、設けられた所定の圧胴１６，１７に対して小さな間隔を置いて配置されていて、かつ／又はデリバリ６の領域において、搬出されるべきシート用の搬送路の上側に配置されている。   In the embodiment according to FIG. 1, the sheet-fed rotary printing press 1 includes several LED / UV dryers 14. The LED / UV dryer 14 is arranged at a small interval with respect to the predetermined impression cylinders 16 and 17 provided and / or in the area of the delivery 6, the conveyance path for the sheet to be carried out. It is arranged on the upper side.

ＬＥＤ・ＵＶ乾燥機１４は、ハウジング１８を備える。ハウジング１８は、シート搬送方向に対して横向きに配置されている。ハウジング１８は、冷却ユニット１９を備え、冷却ユニット１９に、複数の列を成して配置された、ＵＶ光を放出する複数のＬＥＤ２１が設けられている。ＬＥＤ２１の光線路に、第１の光学系２２が設けられていて、第１の光学系２１から間隔を置いて第２の光学系２３が設けられている。ハウジング１８からの光線出射面で、ハウジング１８は、透過性のカバー２４により閉じられている。   The LED / UV dryer 14 includes a housing 18. The housing 18 is disposed laterally with respect to the sheet conveying direction. The housing 18 includes a cooling unit 19. The cooling unit 19 is provided with a plurality of LEDs 21 that emit UV light and are arranged in a plurality of rows. A first optical system 22 is provided in the optical path of the LED 21, and a second optical system 23 is provided at a distance from the first optical system 21. The housing 18 is closed by a transparent cover 24 at a light emitting surface from the housing 18.

相互に間隔を置いた２箇所で、温度センサ２６，２７が、カバー２４に接触して配置されている。温度センサ２６，２７は、評価ユニット２８に接続されている。   The temperature sensors 26 and 27 are arranged in contact with the cover 24 at two positions spaced from each other. The temperature sensors 26 and 27 are connected to the evaluation unit 28.

評価ユニット２８は、検知された温度値又は検知された温度差を用いて、目標値・実際値比較を実行し、所定の許容値の超過が生じると、第１のステップで、カバー２４をクリーニングするための信号を出力し、所定のより大きなずれが生じると、第２のステップで、例えば電流／電圧供給のオフによる、ＬＥＤ２１をオフするための信号を出力する。   The evaluation unit 28 performs a target value / actual value comparison using the detected temperature value or the detected temperature difference. When the predetermined allowable value is exceeded, the cover 24 is cleaned in the first step. When a larger shift than a predetermined value occurs, a signal for turning off the LED 21 is output in the second step, for example, by turning off the current / voltage supply.

図３による第２の態様では、複数の温度センサ３１〜３３が設けられている。温度センサ３１〜３３は、複数のＬＥＤ列２１の間に配置されていて、非接触式にハウジング１８内の温度を測定する。非接触式に測定されたそれぞれ異なる温度に基づいて、透過性のカバー２４の汚れを推測することができる。評価は、同様に評価ユニット２８を用いて行われる。   In the second mode according to FIG. 3, a plurality of temperature sensors 31 to 33 are provided. The temperature sensors 31 to 33 are arranged between the plurality of LED rows 21 and measure the temperature in the housing 18 in a non-contact manner. Based on the different temperatures measured in a non-contact manner, contamination of the permeable cover 24 can be estimated. Evaluation is similarly performed using the evaluation unit 28.

１ 印刷機
２ フィーダ
３ 印刷ユニット
４ 印刷ユニット
６ デリバリ
７ シート
８ パイル
９ フィーダボード
１０ 主紙積み台
１１ 版胴
１２ 版胴
１３ サクションヘッド
１４ ＬＥＤ・ＵＶ乾燥機
１６ 圧胴
１７ 圧胴
１８ ハウジング
１９ 冷却ユニット
２１ ＬＥＤ
２２ 第１の光学系
２３ 第２の光学系
２４ 透過性のカバー
２６ 温度センサ
２７ 温度センサ
２８ 評価ユニット
３１ 温度センサ
３２ 温度センサ
３３ 温度センサ DESCRIPTION OF SYMBOLS 1 Printing machine 2 Feeder 3 Printing unit 4 Printing unit 6 Delivery 7 Sheet 8 Pile 9 Feeder board 10 Main paper stacking board 11 Plate cylinder 12 Plate cylinder 13 Suction head 14 LED / UV dryer 16 Pressure cylinder 17 Pressure cylinder 18 Housing 19 Cooling Unit 21 LED
DESCRIPTION OF SYMBOLS 22 1st optical system 23 2nd optical system 24 Transparent cover 26 Temperature sensor 27 Temperature sensor 28 Evaluation unit 31 Temperature sensor 32 Temperature sensor 33 Temperature sensor

Claims (10)

複数のＬＥＤのアセンブリを備え、
前記複数のＬＥＤは、ＵＶ光を放射するものであり、かつハウジング内に配置されており、
前記ハウジングの出射窓は、ＵＶ光線透過性のカバーを有する、
ＵＶインキ又は塗料を硬化する装置であって、
前記透過性のカバー（２４）の温度を把握するための少なくとも１つのセンサ（２６，２７；３１，３２，３３）が設けられていることを特徴とする、ＵＶインキ又は塗料を硬化する装置。 A plurality of LED assemblies;
The plurality of LEDs emit UV light and are disposed in the housing,
The exit window of the housing has a UV light transmissive cover,
A device for curing UV inks or paints,
An apparatus for curing UV ink or paint, characterized in that at least one sensor (26, 27; 31, 32, 33) for determining the temperature of the permeable cover (24) is provided. 前記透過性のカバー（２４）の温度差を把握するための、相互に間隔を置いて配置された少なくとも２つの温度センサ（２６，２７；３１，３２，３３）が設けられている、請求項１記載の装置。   The at least two temperature sensors (26, 27; 31, 32, 33) spaced apart from one another are provided for determining the temperature difference of the permeable cover (24). The apparatus according to 1. 前記温度センサ（２６，２７；３１，３２，３３）は、目標値・実際値比較を実行するための評価ユニット（２８）に接続されている、請求項１又は２記載の装置。   The device according to claim 1 or 2, wherein the temperature sensor (26, 27; 31, 32, 33) is connected to an evaluation unit (28) for performing a target / actual value comparison. 前記温度センサ（２６，２７）は、前記透過性のカバー（２４）に接触して配置されている、請求項１記載の装置。   The device according to claim 1, wherein the temperature sensors (26, 27) are arranged in contact with the permeable cover (24). 前記温度センサ（３１，３２，３３）は、非接触式に測定するように、前記透過性のカバー（２４）から間隔を置いて配置されている、請求項２記載の装置。   The device according to claim 2, wherein the temperature sensor (31, 32, 33) is spaced from the permeable cover (24) for non-contact measurement. 前記複数のＬＥＤ（２１）と前記透過性のカバー（２４）との間の光線路に、ＵＶ光線を集束するための第１の光学系（２２）及び第２の光学系（２３）が配置されている、請求項１から５までのいずれか１項記載の装置。   A first optical system (22) and a second optical system (23) for converging UV rays are arranged in an optical path between the plurality of LEDs (21) and the transmissive cover (24). 6. The device according to any one of claims 1 to 5, wherein: 請求項１から６までのいずれか１項記載のＬＥＤ・ＵＶ乾燥機（１４）を備える枚葉輪転印刷機。   A sheet-fed rotary printing press comprising the LED / UV dryer (14) according to any one of claims 1 to 6. 請求項１から６までのいずれか１項記載のＬＥＤ・ＵＶ乾燥機（１４）を備えるインクジェットプリンタ。   An ink jet printer comprising the LED / UV dryer (14) according to any one of claims 1 to 6. ＬＥＤ・ＵＶ乾燥機の透過性のカバーの汚れを認識する方法であって、
相互に間隔を置いて配置された少なくとも２つのセンサ（２１）が、前記カバー（２４）の温度を、前記カバー（２４）に接触することにより又は非接触式に測定し、
温度測定値を評価ユニット（２８）に供給し、
そのあとで所定の値との目標値・実際値比較を実行し、
所定の値からのずれが生じると、汚れを表示する信号を出力する、
ことを特徴とする、ＬＥＤ・ＵＶ乾燥機の透過性のカバーの汚れを認識する方法。 A method for recognizing dirt on a transparent cover of an LED / UV dryer,
At least two sensors (21) spaced apart from each other measure the temperature of the cover (24) by contacting or non-contacting the cover (24);
Supply the temperature measurement to the evaluation unit (28);
After that, execute the target value / actual value comparison with the predetermined value,
When a deviation from the predetermined value occurs, a signal indicating dirt is output.
A method for recognizing dirt on a transparent cover of an LED / UV dryer. ＬＥＤ・ＵＶ乾燥機の透過性のカバーの汚れを認識する方法であって、
相互に間隔を置いて配置された少なくとも２つのセンサ（２１）が、前記カバー（２４）の温度を、前記カバー（２４）に接触することにより又は非接触式に測定し、
温度測定値を評価ユニット（２８）に供給し、
そのあとで所定の値との目標値・実際値比較を実行し、
より大きなずれが生じると、ＬＥＤ・ＵＶ乾燥機のオフを行う、
ことを特徴とする、ＬＥＤ・ＵＶ乾燥機の透過性のカバーの汚れを認識する方法。 A method for recognizing dirt on a transparent cover of an LED / UV dryer,
At least two sensors (21) spaced apart from each other measure the temperature of the cover (24) by contacting or non-contacting the cover (24);
Supply the temperature measurement to the evaluation unit (28);
After that, execute the target value / actual value comparison with the predetermined value,
When larger displacement occurs, the LED / UV dryer is turned off.
A method for recognizing dirt on a transparent cover of an LED / UV dryer.
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