EP0679754B1 - Verfahren und Vorrichtung zur Behandlung von textilem Warengut während des Trocknungsprozesses - Google Patents
Verfahren und Vorrichtung zur Behandlung von textilem Warengut während des Trocknungsprozesses Download PDFInfo
- Publication number
- EP0679754B1 EP0679754B1 EP95105588A EP95105588A EP0679754B1 EP 0679754 B1 EP0679754 B1 EP 0679754B1 EP 95105588 A EP95105588 A EP 95105588A EP 95105588 A EP95105588 A EP 95105588A EP 0679754 B1 EP0679754 B1 EP 0679754B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature
- goods
- drum
- airflow
- air
- 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
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Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F43/00—Dry-cleaning apparatus or methods using volatile solvents
- D06F43/08—Associated apparatus for handling and recovering the solvents
- D06F43/086—Recovering the solvent from the drying air current
Definitions
- the invention relates to the current state of the art of machines open operation or closed circuit based on the course of the Drying airflow required.
- An open company is to be understood as when the air is sucked in from the environment and blown back into the environment , where indoor air or outdoor air can be used.
- the closed cycle points a closed circulating air flow with a condensation phase a subsequent so-called reduction phase in an associated one Activated carbon plant is subjected to, in which the solvent content of the air flow is reduced becomes.
- the devices mentioned at the beginning also referred to as machines that include the drying process.
- Drying process including machines with the drying process moisture disposed of by air with an inlet temperature of about 90 ° C in the Drum of the machine over the textiles to be treated and thereby the Solvents such as PER are converted into gaseous form.
- the airflow temperature drops at the drum outlet to about 20 to 25 ° C, for example by piping the Air flow through a cold register, e.g. by means of a blower, from where the gas comes from condensed to the air flow.
- inlet temperatures higher than 90-95 ° C have been considered harmful to textiles. This was believed to be the top one The temperature limit is exposed to the textile goods without being damaged can be.
- the speed of the blower reduces what is difficult to solve from a control point of view because suitable precise parameters for this are missing.
- the air flow as from the DE-AS-22 36 683 known, guided over an activated carbon plant and there to the given Value reduced.
- the dry control or regulating device does not detect any temperature fluctuations the air flow in the drum area, which inevitably at Drying process occur, also not the influences of temperatures outside the chemical cleaning machine, which depending on the season and location Influence the drying time factor during gas phase formation up to 30%. She controls moreover, not the air humidity, based on the water content of the air flow, which is of particular importance. Naturally, this is true also to other machines that include a drying process. The requirements the clothing industry, which do not allow dimensional changes of the textiles cannot be satisfied by such measuring methods. If the goods overdry Excessively high temperatures cause irreversible damage due to water withdrawal from the fiber, which is particularly useful for delicate textiles such as mohair and pure wool is the case.
- the drum outlet temperature gradually increases, and with it the temperature Temperature of the goods, while at the same time the evaporative cooling capacity in the drum on the textile fibers decreases.
- This in turn means a higher one Energy input to the cold register in chemical cleaning machines and leads automatically to the fact that the temperature increases on the output side of the cold register, which a means higher solvent concentration in the air flow and is not desired. Measurements have shown that up to 8 minutes of drying time are wasted because during this phase the gas concentration at the entrance to the cold register is compared shows almost no gradient to the cold register exit.
- the drum outlet is generally located a gas meter attached. This is required or prescribed to to prevent the loading door from being opened while there is more than 280 ppm solvent gas concentration in the drum room.
- the residual solvent content in the textiles is not recorded here.
- these devices are technically designed so that they either in the range of 0 - 800 ppm, or can measure in the range of 800 - 20000 ppm. Such devices can therefore do not measure the entire drying process and control it optimally. In practice these devices are also not used for regulation.
- a gas measuring device is preferred with a more precise measuring range of 0 - 800 ppm. An optimal measurement the course of drying through these devices at a gas concentration above 800 ppm is not possible. Thus, a single gas meter will not entire measurable gas concentration range within the drying process.
- the temperature at the drum outlet is taken into account, which with the decrease the amount of solvent increases and can cause the goods to overheat, however, as mentioned, the actual temperature of the goods is not measured.
- JP-A-5177091 is a drying machine known, the actual temperature of the goodsputes for controlling the heating register were measured becomes.
- the object is achieved by a method which is characterized in that is that the temperature or the humidity of the surface of the textile Goods measured without contact and depending on the measured values the air flow, air temperature or humidity during the Drying process is affected.
- the air volume flow and / or the air temperature is dependent of the contactlessly measured temperature or moisture on the surface of the goods and depending on the gas concentration of the solvent constantly changing in the air flow, at least the gas concentration of the solvent from the temperature and pressure of the air flow on the outlet side of the Drum determined and the temperature on the input side of the drum lowered when the temperature is on the outlet side of the drum or on the surface of the goods exceeds a predetermined value.
- the airflow during the course of drying in addition to solvent, the amount of water from the Goods are collected and returned to the drum in gas form to the goods, when the moisture content of the goods drops below a specified value.
- the task according to the invention is achieved by a device, in particular Dry cleaning machine, washing machine, dryer or the like
- a device for performing the method according to the invention solved the one circulating air flow and an organic solvent or water, or just one circulating or an open airflow used, and a drum for recording of the goods, a heating register, a control device and if necessary has a blower and a cold register, in that in the area of Drum a measuring device for non-contact measurement of the surface temperature or the moisture of the goods is arranged with the control device is in operative connection, which depends on the measured values Air volume flow, the air temperature or the humidity during the Drying process by means of a throttle device located in the air conveying path steplessly regulates that between the output side of the drum and the input side of the Cooling fan provided is arranged.
- the task continues at Devices that are not equipped with a movable drum, e.g. Tunnel finishers and baking ovens, solved by one installed on the room wall, for example Measuring device that in the manner described above by a non-contact measurement Regulation of the air volume flow enables.
- a movable drum e.g. Tunnel finishers and baking ovens
- the throttle device is arranged in the air conveying path.
- the throttle device can be, for example, a throttle valve or a throttle valve.
- a temperature sensor On the output side of the drum there is a temperature sensor, a pressure sensor and / or a moisture sensor arranged in the air conveying path with the control device are connected.
- the invention first of all provides a measuring method for non-contact measurement the temperature of the goods. It is a Measuring device based on the principle of the optical radiation pyrometer, for example an infrared or other radiation measuring device. Here, the radiation emission of textiles in the infrared range.
- the surface temperature may differ from the temperature inside the goods distinguish, but this is irrelevant because of the physical Process of drying with a corresponding need for heat of vaporization and due to the convective supply of this heat from the outside via the heated one Airflow in the goods is always a temperature below the surface temperature will set. Possible damage to textiles due to overtemperature can therefore only be carried out on the surface and this is precisely where the invention is based recorded the temperature.
- the evaporation or drying process takes place at the interface between Goods and air take place complex heat and mass transfer processes.
- the temperature of the goods is generally not the same as the temperature the surrounding drying air.
- the temperature of the goods is significantly lower at the start of the drying process than the air temperature. According to the invention, however, it is possible, especially at the beginning drying at high temperatures.
- This high temperature is now via a suitable control system with the surface temperature of the goods as Control variable and the output of the heating register for the drying air as a control variable adjusted.
- Due to the complex conditions on the surface of the goods are mostly non-linear controllers for this application, for example based on fuzzy logic.
- the non-contact temperature and humidity measurement the surface of the textile goods in the drum in connection with The fuzzy logic allows the different sensitivities of the textile goods to differentiate and thus the drying process of the type and - adjust sensitivity.
- the desired low solvent concentrations of less than 280 ppm, in particular in a dry cleaning machine, can now, as tests show have to be achieved even without activated carbon plant, so that a technical and cost very complex part of the machine is eliminated. Because of economical reasons an activated carbon filter can still be provided to reduce the solvent content in the Further reduce air flow. In particular, the new process achieves that the residual solvent concentration in the textiles again of about 1% of Goods weight is reduced to less than 0.4% of the goods weight.
- control device which is the central control device of the Chemical cleaning machine or machine including a drying process forms, the information about the gas pressure, the gas temperature, the gas volume flow, and possibly the air humidity on the outlet side of the drum.
- This Data are from the appropriate measuring devices, namely temperature, pressure and Humidity sensor, recorded at the drum outlet and to the control device passed on.
- the control device exercises via the throttle device, which is preferably a throttle valve is influence between the drum outlet and the cold register input the temperature and the air pressure in the drum by reducing or increasing of the air volume flow.
- the throttle device which is preferably a throttle valve is influence between the drum outlet and the cold register input the temperature and the air pressure in the drum by reducing or increasing of the air volume flow.
- the moisture content of the also plays an important role in the drying process Airflow. Due to the particularly high requirements for emissions reduction will be a disadvantageous reduction in the current state of the art the natural residual moisture of the goods to be dried.
- This process step is based on the following control process. Because it an airtight system that includes a drying process Machine is the mass of air during the drying process constant. At the end of drying, the control device can be operated via the throttle valve reduce the passage of air in the air path. This builds between Blower and throttle valve an increased pressure. Because the mass of air in the circuit remains constant, the air volume and thus the air pressure on the rest decrease Part of the system, especially in the drum. According to the type of textiles the throttle valve is closed more or less. Install accordingly different pressure drop and thus a more or less large negative pressure in the drum.
- FIG. 1 shows the general execution of a Drying system in which the air is circulated.
- the cold register represented by the dash-dot-dash line over which the Exhaust air is not required and the air is not circulated.
- this is not important for the present invention.
- the non-contact temperature measuring device 41 serves as well as the temperature measurement by the temperature sensor 25 and the humidity measurement by the Humidity sensor 29 for recognizing the end of the drying process. Of the Drying process is finished when at the temperature measuring points, namely the non-contact Temperature measuring device 41 and the temperature sensor 25, respectively the measuring points, namely the humidity sensor 29 and the non-contact Temperature measuring device 41, the corresponding temperature or air humidity is measured.
- Fig. 2 shows a dry cleaning machine with a closed air circuit is explained in more detail below.
- the central part of the dry cleaning machine is the drum 1, which merges into an air conveying path 5 on the output side 3, which, as from the drawing is easy to see, forms a closed cycle.
- the direction of circulation of the air flow is indicated by the corresponding arrows in the air conveying path 5 featured.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Treatment Of Fiber Materials (AREA)
- Control Of Washing Machine And Dryer (AREA)
- Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
Description
- Fig. 1:
- eine allgemeine schematischer Darstellung des Grundprinzips einer einen Trocknungsprozeß einschließenden Maschine mit geschlossenen Luftkreislauf; und
- Fig. 2:
- ein Ausführungsbeispiel einer Chemisch-Reinigungsmaschine mit geschlossenen Luftkreislauf.
Claims (10)
- Verfahren zur Behandlung von textilem Warengut während des Trocknungsprozesses in Chemisch-Reinigungsmaschinen, Waschmaschinen, Wäschetrocknern und dergleichen Einrichtungen, sowie in speziellen Einrichtungen zur chemischen Oberflächenbehandlung von Textilien, die einen zirkulierenden Luftstrom und ein Lösemittel verwenden, bzw. Einrichtungen, die nur Wasser und somit kein Lösemittel entfernen und bei denen der Luftstrom im Kreislauf oder offen geführt wird und solche, die ein Heizregister aufweisen, dadurch gekennzeichnet, daß die Temperatur oder die Feuchtigkeit der Oberfläche des textilen Warengutes berührungslos gemessen und in Abhängigkeit von den gemessenen Werten der Luftstrom, die Lufttemperatur oder die Luftfeuchtigkeit während des Trocknungsverlaufes beeinflußt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Luftvolumenstrom und/oder die Lufttemperatur in Abhängigkeit von der berührungslos gemessenen Temperatur oder Feuchtigkeit an der Oberfläche des Warengutes sowie in Abhängigkeit von der Gaskonzentration des Lösemittels im Luftstrom stetig verändert wird, wobei die Gaskonzentration des Lösemittels zumindest aus der Temperatur und dem Druck des Luftstromes an der Ausgangsseite der Trommel ermittelt und die Temperatur an der Eingangsseite der Trommel abgesenkt wird, wenn die Temperatur an der Ausgangsseite der Trommel oder an der Warenoberfläche einen vorgegebenen Wert übersteigt.
- Verfahren nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß zusätzlich zur Temperatur und zum Druck an der Ausgangsseite der Trommel der Luftfeuchtigkeitsgehalt des Luftstroms gemessen wird.
- Verfahren nach den Ansprüchen 1 bis 3, dadurch gekennzeichnet, daß das Heizregister in Abhängigkeit von der Temperatur oder Feuchtigkeit der Oberfläche des Warengutes mittels einer Regeleinrichtung geregelt und abgeschaltet wird, wenn die Gaskonzentration des Luftstromes unter einen vorgegeben Wert absinkt, um den Trocknungsprozeß zu beenden.
- Verfahren nach den Ansprüchen 1 bis 4, dadurch gekennzeichnet, daß die im Luftstrom während des Trocknungsverlaufes anfallende Wassermenge aus dem Warengut aufgefangen und in Gasform zum Warengut in die Trommel zurückgeführt wird, wenn der Feuchtigkeitsgehalt des Warengutes unter einen vorgegebenen Wert absinkt.
- Vorrichtung, insbesondere Chemisch-Reinigungsmaschine, Waschmaschine, Wäschetrockner oder dergleichen Einrichtung zur Durchführung des Verfahrens nach Anspruch 1, die einen zirkulierenden Luftstrom und ein Lösemittel, oder einen zirkulierenden oder einen offenen Luftstrom verwendet, und eine Trommel zur Aufnahme des Warengutes, ein Heizregister, eine Regeleinrichtung und gegebenenfalls ein Gebläse und ein Kälteregister aufweisen, dadurch gekennzeichnet, daß im Bereich der Trommel (1) eine Meßeinrichtung (41) zum berührungslosen Messen der Oberflächentemperatur oder der Feuchtigkeit des Warengutes angeordnet ist, die mit der Regeleinrichtung (23) in Wirkverbindung steht, welche in Abhängigkeit von den gemessenen Werten den Luftstrom, die Lufttemperatur oder die Luftfeuchtigkeit während des Trocknungsverlaufes mittels einer im Luftförderweg (5) befindlichen Drosseleinrichtung (9) stufenlos regelt, die zwischen dem ausgangsseitig der Trommel (1) und eingangsseitg des Kälteregisters (11) vorgesehenen Gebläses (7) angeordnet ist.
- Vorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß die Meßeinrichtung (41) an der Be- und Entladetür der Trommel (1) angebracht ist.
- Vorrichtung nach den Ansprüchen 6 und 7, dadurch gekennzeichnet, daß die Meßeinrichtung (41) im wesentlichen in der Ebene der Drehachse (39) der Trommel (1) angebracht ist.
- Vorrichtung nach den Ansprüchen 6 bis 8, dadurch gekennzeichnet, daß ausgangsseitig der Trommel (1) ein Temperaturfühler (25), ein Druckfühler (27) und/oder ein Feuchtigkeitsfühler (29) im Luftförderweg (5) angeordnet sind, die mit der Regeleinrichtung (23) verbunden sind.
- Vorrichtung ohne einer Trommel, insbesondere spezielle Einrichtungen für die chemische Oberflächenbehandlung zur Durchführung des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, daß eine Meßeinrichtung (41) zum berührungslosen Messen der Oberflächentemperatur des Warengutes eingesetzt wird, über die in Abhängigkeit von den gemessenen Werten der Luftvolumenstrom, die Lufttemperatur oder die Luftfeuchtigkeit Feuchtigkeit während der Behandlung des Warengutes beeinflußbar ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4414324A DE4414324A1 (de) | 1994-04-25 | 1994-04-25 | Chemisch-Reinigungsmaschine mit zirkulierendem Luftstrom und Verfahren zur Steuerung des Trocknungsprozesses in dieser Chemisch-Reinigungsmaschine |
DE4414324 | 1994-04-25 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0679754A2 EP0679754A2 (de) | 1995-11-02 |
EP0679754A3 EP0679754A3 (de) | 1996-01-17 |
EP0679754B1 true EP0679754B1 (de) | 1998-09-23 |
Family
ID=6516334
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95105588A Expired - Lifetime EP0679754B1 (de) | 1994-04-25 | 1995-04-13 | Verfahren und Vorrichtung zur Behandlung von textilem Warengut während des Trocknungsprozesses |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0679754B1 (de) |
DE (2) | DE4414324A1 (de) |
ES (1) | ES2124929T3 (de) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1279760A2 (de) | 2001-07-24 | 2003-01-29 | Herbert Kannegiesser GmbH | Verfahren zum Trocknen von Wäsche |
DE102007042628A1 (de) | 2007-09-09 | 2009-03-12 | Fritz Curtius | Kontrollverfahren für eine Behandlung von Trockengut in einem energiebetriebenen Produkt |
US8819958B2 (en) | 2010-11-08 | 2014-09-02 | Whirlpool Corporation | End of cycle detection for a laundry treating appliance |
US9580860B2 (en) | 2009-12-18 | 2017-02-28 | Whirlpool Corporation | Method for operating a clothes dryer using load temperature determined by an infrared sensor |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1300040B1 (it) * | 1998-05-15 | 2000-04-04 | Ama Universal Spa | Procedimento ed impianto a circuito chiuso per il lavaggio e/o l'asciugatura di prodotti. |
US6375686B1 (en) | 2000-05-08 | 2002-04-23 | Su Heon Kim | Method and apparatus for treating spots on a spotting table with a spotting gun |
US6855173B2 (en) | 2000-06-05 | 2005-02-15 | Procter & Gamble Company | Use of absorbent materials to separate water from lipophilic fluid |
US6828292B2 (en) | 2000-06-05 | 2004-12-07 | Procter & Gamble Company | Domestic fabric article refreshment in integrated cleaning and treatment processes |
US7018423B2 (en) | 2000-06-05 | 2006-03-28 | Procter & Gamble Company | Method for the use of aqueous vapor and lipophilic fluid during fabric cleaning |
US6670317B2 (en) | 2000-06-05 | 2003-12-30 | Procter & Gamble Company | Fabric care compositions and systems for delivering clean, fresh scent in a lipophilic fluid treatment process |
US6939837B2 (en) | 2000-06-05 | 2005-09-06 | Procter & Gamble Company | Non-immersive method for treating or cleaning fabrics using a siloxane lipophilic fluid |
JP2003535628A (ja) * | 2000-06-05 | 2003-12-02 | ザ、プロクター、エンド、ギャンブル、カンパニー | 乾燥装置において乾燥サイクルを制御するためのシステム |
US6673764B2 (en) | 2000-06-05 | 2004-01-06 | The Procter & Gamble Company | Visual properties for a wash process using a lipophilic fluid based composition containing a colorant |
US6691536B2 (en) | 2000-06-05 | 2004-02-17 | The Procter & Gamble Company | Washing apparatus |
US6840963B2 (en) | 2000-06-05 | 2005-01-11 | Procter & Gamble | Home laundry method |
DE102004005179B4 (de) * | 2004-02-02 | 2006-07-13 | Wobben, Aloys, Dipl.-Ing. | Windenergieanlage |
US8549770B2 (en) | 2009-12-18 | 2013-10-08 | Whirlpool Corporation | Apparatus and method of drying laundry with drying uniformity determination |
US8245415B2 (en) | 2009-12-18 | 2012-08-21 | Whirlpool Corporation | Method for determining load size in a clothes dryer using an infrared sensor |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2236683B1 (de) * | 1972-07-26 | 1973-10-31 | Seco Maschinenbau Gmbh & Co Kg, 7407 Rottenburg | Verfahren und Vorrichtung zum Chemisch Reinigen |
DE2334853A1 (de) * | 1973-07-09 | 1975-01-30 | Rexroth & Szekkessy | Verfahren zum gesteuerten trocknen von waesche in einer trocknungseinrichtung |
US4281465A (en) * | 1978-07-17 | 1981-08-04 | Ameg Verfahrens-Und Umweltschutz-Technik Ag | Method and apparatus for the recovering of solvents in dry cleaning units |
DE3215418A1 (de) * | 1982-04-24 | 1983-10-27 | Miele & Cie GmbH & Co, 4830 Gütersloh | Verfahren und anordnung zur feuchtigkeitsabhaengigen steuerung bei der trocknung von waesche |
JPS63133043A (ja) * | 1986-11-25 | 1988-06-04 | Meito Sci Kk | 布乾燥工程における水分率測定装置 |
JPH0824795B2 (ja) * | 1991-12-27 | 1996-03-13 | リンナイ株式会社 | 乾燥機の給気加熱制御方法及びその装置 |
-
1994
- 1994-04-25 DE DE4414324A patent/DE4414324A1/de not_active Ceased
-
1995
- 1995-04-13 DE DE59503660T patent/DE59503660D1/de not_active Expired - Lifetime
- 1995-04-13 ES ES95105588T patent/ES2124929T3/es not_active Expired - Lifetime
- 1995-04-13 EP EP95105588A patent/EP0679754B1/de not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1279760A2 (de) | 2001-07-24 | 2003-01-29 | Herbert Kannegiesser GmbH | Verfahren zum Trocknen von Wäsche |
DE102007042628A1 (de) | 2007-09-09 | 2009-03-12 | Fritz Curtius | Kontrollverfahren für eine Behandlung von Trockengut in einem energiebetriebenen Produkt |
US9580860B2 (en) | 2009-12-18 | 2017-02-28 | Whirlpool Corporation | Method for operating a clothes dryer using load temperature determined by an infrared sensor |
US8819958B2 (en) | 2010-11-08 | 2014-09-02 | Whirlpool Corporation | End of cycle detection for a laundry treating appliance |
Also Published As
Publication number | Publication date |
---|---|
ES2124929T3 (es) | 1999-02-16 |
EP0679754A2 (de) | 1995-11-02 |
DE59503660D1 (de) | 1998-10-29 |
DE4414324A1 (de) | 1995-10-26 |
EP0679754A3 (de) | 1996-01-17 |
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