WO2011006554A1 - Air dryer - Google Patents

Air dryer Download PDF

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Publication number
WO2011006554A1
WO2011006554A1 PCT/EP2010/002667 EP2010002667W WO2011006554A1 WO 2011006554 A1 WO2011006554 A1 WO 2011006554A1 EP 2010002667 W EP2010002667 W EP 2010002667W WO 2011006554 A1 WO2011006554 A1 WO 2011006554A1
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WO
WIPO (PCT)
Prior art keywords
air dryer
resistor
heating element
heating
compressed air
Prior art date
Application number
PCT/EP2010/002667
Other languages
German (de)
French (fr)
Other versions
WO2011006554A8 (en
Inventor
Andreas Schäl
Frank Van Son
Original Assignee
Wabco Gmbh & Co. Ohg
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Wabco Gmbh & Co. Ohg filed Critical Wabco Gmbh & Co. Ohg
Publication of WO2011006554A1 publication Critical patent/WO2011006554A1/en
Publication of WO2011006554A8 publication Critical patent/WO2011006554A8/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26—Drying gases or vapours
    • B01D53/261—Drying gases or vapours by adsorption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T17/00—Component parts, details, or accessories of power brake systems not covered by groups B60T8/00, B60T13/00 or B60T15/00, or presenting other characteristic features
    • B60T17/002—Air treatment devices
    • B60T17/004—Draining and drying devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/40—Further details for adsorption processes and devices
    • B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
    • B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
    • B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2259/00—Type of treatment
    • B01D2259/45—Gas separation or purification devices adapted for specific applications
    • B01D2259/4566—Gas separation or purification devices adapted for specific applications for use in transportation means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/54—Testing for continuity
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/58—Testing of lines, cables or conductors

Definitions

  • the invention relates to an air dryer for a compressed air system of a motor vehicle according to the preamble of claim 1.
  • Such an air dryer is commonly used in automotive compressed air systems to dry the compressed air delivered by a compressor by means of a desiccant. The dried compressed air is then normally directed to one or more compressed air tanks for use in operating the service brake or other compressed air consumers.
  • the invention is based on the object to increase the reliability of plants in which an air dryer with a heater is used to increase.
  • the invention provides that the air dryer has an electrical resistance for the diagnosis of the heating function of the heating element.
  • the invention thus enables the determination of whether the heating element is functional or z. B. due to a cable break or a faulty socket, the functionality of the heating element is no longer given.
  • the resistor provides a cost-effective way to check the Schufu ⁇ technisch the heating element.
  • Figure 1 shows an embodiment of the air dryer according to the invention
  • FIG. 2 shows another embodiment of the air dryer according to the invention.
  • FIG. 1 shows an embodiment of the air dryer according to the invention.
  • the air dryer 1 has a socket 2 for electrical connection to a voltage source.
  • the voltage source is realized by a battery present in the vehicle and is illustrated in FIG. 1 by symbols (+, -) for the plus and minus poles, which are shown at connections of connection lines lying outside of the air dryer 1.
  • the battery can be connected directly or via a connected to the ignition switch with the terminals.
  • the air dryer 1 has a heating element 3, which serves to heat the air dryer 1.
  • the heating element 3 may, for. B. be realized by a heating resistor or a thermoelectric element. Via a thermostat 4, the heating element 3 can be connected to the battery.
  • the thermostat 4 is used to actuate the heating element 3.
  • the thermostat 4 can, for. B.
  • the bimetallic switch which closes when falling below a certain temperature and thus connects the heating element 3 with both poles of the battery. This allows a flow of current through the heating element 3, which leads to a heating of the heating element 3 and thus also of the air dryer. By heating z. B. a freezing of existing in the air dryer pressure lines can be prevented. When a certain temperature is exceeded, the bimetallic switch opens and interrupts the flow of current through the heating element 3.
  • the air dryer 1 has an electrical resistance 5 for the diagnosis of the heating function of the heating element 3.
  • resistor 5 allows a diagnosis, whether the heating of the air dryer 1 is functional or failed. Defects of
  • Socket 2 or the electrical lines (eg cable break) inside and outside of the air dryer 1, which connect the heating element 3 to the battery, as well as a defective heating element 3 can be replaced by the use of the resistor. standes 5 reliably detected and thus resolved. This increases the reliability of the air dryer 1 and of installations in which the air dryer 1 is used.
  • the resistor 5 is connected in parallel to the thermostat 4. Regardless of the position of the thermostat 4 (open or closed), the resistor 5 causes a low current flow through the lines, which is interrupted only in the event of a defect. This current flow causes a voltage drop across a measuring resistor 6 mounted outside the air dryer 1 between the negative terminal of the battery and the corresponding terminal of the socket 2. This voltage drop is detected by a control unit 7.
  • the heating function of the heating element 3 is considered to be functioning, ie the heating element 3 is in principle able to heat the air dryer 1, since there are no defects of any kind. If the voltage drop is below a certain value, the heating function of the heating element 3 is considered defective, ie the heating element 3 is in principle not able to heat the air dryer 1, since a defect such. B. a line break is present, which causes the current flow in the resistor 5 and the measuring resistor 6 is interrupted and thus the voltage drop over the measuring resistor ü 0 V is.
  • the resistor 5 thus allows independent of the position of the thermostat 5, a diagnosis of the heating of the air dryer 1.
  • the diagnosis of a defect can take place immediately after the occurrence of the defect and appropriate action can be taken.
  • a variant is also conceivable in which the voltage drop across the resistor 5 is supplied to the control unit 7. As a result, the measuring resistor 6 can be omitted.
  • the diagnosis is made on the basis of the voltage drop * across the resistor 5.
  • the resistor 5 is to be dimensioned so that the current flow caused by the resistor 5 is so small that it does not lead to any appreciable heating of the resistor 5 or the heating element 3.
  • Favorable values of the resistance are in a range between 100 ohms - A - and 1000 ohms for a resistance of the heating element 3 in a range between 0.2 ohms and 10 ohms.
  • FIG 2 shows an embodiment of the invention, which differs from that shown in Figure 1 with respect to the interconnection of the resistor 5.
  • the resistor 5 is not connected in parallel to the thermostat 4 but in parallel to the series circuit of heating element 3 and thermostat 4.
  • the diagnosis of the heating is based on the voltage drop across the measuring resistor 6.
  • the inventions further includes a compressed air supply device with an air dryer according to the invention 1.
  • a compressed air supply device which allows the use of the air dryer 1 according to the invention by a corresponding exchange of the known air dryer is z. B. in DE 10 2006 035 772 A1.
  • An advantageous embodiment of the invention provides the summary of the air dryer 1, the compressed air supply device and the control unit 7 in a structural unit. Ie. the aforementioned components have a common housing. In this case, the measuring resistor 6 may be integrated.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

The invention relates to an air dryer (1) for compressed air system of a motor vehicle, having at least one electric heating element (3) and an electric resistance (5) for diagnosing the heating function of the heating element.

Description

Lufttrockner  air dryer
Die Erfindung betrifft einen Lufttrockner für ein Druckluftsystem eines Kraftfahrzeuges gemäß dem Oberbegriff des Anspruchs 1. The invention relates to an air dryer for a compressed air system of a motor vehicle according to the preamble of claim 1.
Ein derartiger Lufttrockner wird üblicherweise in Druckluftanlagen von Kraftfahrzeugen verwendet, um die von einem Kompressor geförderte Druckluft mittels eines Trocknungsmittels zu trocknen. Die getrocknete Druckluft wird dann normalerweise zu einem oder mehreren Druckluftbehältern zur Verwendung im Be- trieb der Betriebsbremse oder anderer Druckluftverbraucher geleitet. Such an air dryer is commonly used in automotive compressed air systems to dry the compressed air delivered by a compressor by means of a desiccant. The dried compressed air is then normally directed to one or more compressed air tanks for use in operating the service brake or other compressed air consumers.
Es ist bekannt, derartige Lufttrockner mit einer elektrischen Heizung bzw. einem elektrischen Heizelement zu versehen, um ein Einfrieren von Leitungen zu verhindern. Des Weiteren kann die Heizung, wie z. B. in DE 699 14 104 T2 be- schrieben, auch zu einer Steigerung der Trocknung des Trocknungsmittels während der Regeneration des Lufttrockners eingesetzt werden. It is known to provide such air dryer with an electric heater or an electric heating element to prevent freezing of lines. Furthermore, the heater, such. B. in DE 699 14 104 T2 described, are also used to increase the drying of the drying agent during the regeneration of the air dryer.
Der Erfindung liegt die Aufgabe zu Grunde, die Zuverlässigkeit von Anlagen, bei denen ein Lufttrockner mit einer Heizung eingesetzt wird, zu erhöhen. The invention is based on the object to increase the reliability of plants in which an air dryer with a heater is used to increase.
Die Erfindung löst diese Aufgabe durch die in dem Anspruch 1 angegebenen Merkmale. The invention solves this problem by the features specified in the claim 1.
Die Erfindung sieht vor, dass der Lufttrockner einen elektrischen Widerstand zur Diagnose der Heizfunktion des Heizelementes aufweist. Die Erfindung ermöglicht somit die Feststellung, ob das Heizelement funktionsfähig ist oder z. B. aufgrund eines Kabelbruchs oder einer fehlerhaften Buchse die Funktionsfähigkeit des Heizelementes nicht mehr gegeben ist. Der Widerstand stellt eine kostengünstige Möglichkeit zur Überprüfung der Heizfuήktion des Heizelementes dar. The invention provides that the air dryer has an electrical resistance for the diagnosis of the heating function of the heating element. The invention thus enables the determination of whether the heating element is functional or z. B. due to a cable break or a faulty socket, the functionality of the heating element is no longer given. The resistor provides a cost-effective way to check the Heizfuήktion the heating element.
Vorteilhafte Ausführungsformen der Erfindung ergeben sich aus den Unteransprüchen und aus den anhand der beigefügten Zeichnung näher erläuterten Ausführungsbeispielen. In der Zeichnung zeigt: Figur 1 eine Ausführungsform des erfindungsgemäßen Lufttrockners und Advantageous embodiments of the invention will become apparent from the dependent claims and from the illustrated with reference to the accompanying drawings embodiments. In the drawing shows: Figure 1 shows an embodiment of the air dryer according to the invention and
Figur 2 eine weitere Ausführungsform des erfindungsgemäßen Lufttrockners. Figure 2 shows another embodiment of the air dryer according to the invention.
Figur 1 zeigt eine Ausführungsform des erfindungsgemäßen Lufttrockners. Der Lufttrockner 1 weist eine Buchse 2 zur elektrischen Verbindung mit einer Spannungsquelle auf. Die Spannungsquelle wird durch eine im Fahrzeug vorhandene Batterie realisiert und ist in Figur 1 durch Symbole (+, -) für den Plus- und Minus- pol veranschaulicht, die an Anschlüsse von außerhalb des Lufttrockners 1 liegenden Verbindungsleitungen eingezeichnet sind. Die Batterie kann direkt oder aber über einen mit der Zündung verbundenen Schalter mit den Anschlüssen verbunden sein. Der Lufttrockner 1 weist ein Heizelement 3 auf, welches zur Heizung des Lufttrockners 1 dient. Das Heizelement 3 kann z. B. durch einen Heizwiderstand oder ein thermoelektrisches Element realisiert sein. Über ein Thermostat 4 kann das Heizelement 3 mit der Batterie verbunden werden. Das Thermostat 4 dient zur Betätigung des Heizelementes 3. Das Thermostat 4 kann z. B. durch einen Bimetallschalter realisiert sein, der bei einem Unterschreiten einer bestimmten Temperatur schließt und so das Heizelement 3 mit beiden Polen der Batterie verbindet. Hierdurch wird ein Stromfluss durch das Heizelement 3 ermöglicht, der zu einer Erwärmung des Heizelementes 3 und somit auch des Lufttrockners führt. Durch die Erwärmung kann z. B. ein Einfrieren von im Lufttrockner vorhan- denen Druckleitungen verhindert werden. Bei Überschreiten einer bestimmten Temperatur öffnet der Bimetallschalter und unterbricht den Stromfluss durch das Heizelement 3. FIG. 1 shows an embodiment of the air dryer according to the invention. The air dryer 1 has a socket 2 for electrical connection to a voltage source. The voltage source is realized by a battery present in the vehicle and is illustrated in FIG. 1 by symbols (+, -) for the plus and minus poles, which are shown at connections of connection lines lying outside of the air dryer 1. The battery can be connected directly or via a connected to the ignition switch with the terminals. The air dryer 1 has a heating element 3, which serves to heat the air dryer 1. The heating element 3 may, for. B. be realized by a heating resistor or a thermoelectric element. Via a thermostat 4, the heating element 3 can be connected to the battery. The thermostat 4 is used to actuate the heating element 3. The thermostat 4 can, for. B. be realized by a bimetallic switch, which closes when falling below a certain temperature and thus connects the heating element 3 with both poles of the battery. This allows a flow of current through the heating element 3, which leads to a heating of the heating element 3 and thus also of the air dryer. By heating z. B. a freezing of existing in the air dryer pressure lines can be prevented. When a certain temperature is exceeded, the bimetallic switch opens and interrupts the flow of current through the heating element 3.
Erfindungsgemäß ist vorgesehen, dass der Lufttrockner 1 einen elektrischen Widerstand 5 zur Diagnose der Heizfunktion des Heizelementes 3 aufweist.According to the invention, it is provided that the air dryer 1 has an electrical resistance 5 for the diagnosis of the heating function of the heating element 3.
Hierunter ist zu verstehen, dass der Widerstand 5 eine Diagnose ermöglicht, ob die Heizung des Lufttrockners 1 funktionsfähig oder ausgefallen ist. Defekte derThis is to be understood that the resistor 5 allows a diagnosis, whether the heating of the air dryer 1 is functional or failed. Defects of
Buchse 2 oder der elektrischen Leitungen (z. B. Kabelbruch) innerhalb als auch außerhalb des Lufttrockners 1 , welche das Heizelement 3 mit der Batterie ver- binden, sowie ein defektes Heizelement 3 können durch den Einsatz des Wider- standes 5 zuverlässig erkannt und somit behoben werden. Hierdurch wird die Zuverlässigkeit des Lufttrockners 1 und von Anlagen in denen der Lufttrockner 1 eingesetzt wird erhöht. Bei der in Figur 1 gezeigten Variante ist der Widerstand 5 parallel zum Thermostaten 4 geschaltet. Unabhängig von der Stellung des Thermostaten 4 (geöffnet oder geschlossen) verursacht der Widerstand 5 einen geringen Stromfluss durch die Leitungen, der nur im Falle eines Defektes unterbrochen wird. Dieser Stromfluss verursacht einen Spannungsabfall über einen außerhalb des Lufttrockners 1 zwischen dem Minuspol der Batterie und dem entsprechenden Anschluss der Buchse 2 angebrachten Messwiderstand 6. Dieser Spannungsabfall wird von einem Steuergerät 7 erfasst. Falls der Spannungsabfall oberhalb eines bestimmten Wertes liegt, wird die Heizfunktion des Heizelementes 3 als funktionierend angesehen, d. h. das Heizelement 3 ist prinzipiell in der Lage den Lufttrockner 1 zu erwärmen, da keine Defekte irgendwelcher Art vorliegen. Falls der Spannungsabfall unterhalb eines bestimmten Wertes liegt, wird die Heizfunktion des Heizelementes 3 als defekt angesehen, d. h. das Heizelement 3 ist prinzipiell nicht in der Lage den Lufttrockner 1 zu erwärmen, da ein Defekt, wie z. B. ein Leitungsbruch vorliegt, der dazu führt dass der Stromfluss in dem Widerstand 5 und dem Messwiderstand 6 unterbrochen ist und somit der Spannungsabfall ü- ber dem Messwiderstand 0 V beträgt. Socket 2 or the electrical lines (eg cable break) inside and outside of the air dryer 1, which connect the heating element 3 to the battery, as well as a defective heating element 3 can be replaced by the use of the resistor. standes 5 reliably detected and thus resolved. This increases the reliability of the air dryer 1 and of installations in which the air dryer 1 is used. In the variant shown in FIG. 1, the resistor 5 is connected in parallel to the thermostat 4. Regardless of the position of the thermostat 4 (open or closed), the resistor 5 causes a low current flow through the lines, which is interrupted only in the event of a defect. This current flow causes a voltage drop across a measuring resistor 6 mounted outside the air dryer 1 between the negative terminal of the battery and the corresponding terminal of the socket 2. This voltage drop is detected by a control unit 7. If the voltage drop is above a certain value, the heating function of the heating element 3 is considered to be functioning, ie the heating element 3 is in principle able to heat the air dryer 1, since there are no defects of any kind. If the voltage drop is below a certain value, the heating function of the heating element 3 is considered defective, ie the heating element 3 is in principle not able to heat the air dryer 1, since a defect such. B. a line break is present, which causes the current flow in the resistor 5 and the measuring resistor 6 is interrupted and thus the voltage drop over the measuring resistor ü 0 V is.
Der Widerstand 5 ermöglicht somit unabhängig von der Stellung des Thermostaten 5 eine Diagnose der Heizung des Lufttrockners 1. Somit kann die Diagnose eines Defektes unmittelbar nach dem Auftreten des Defektes erfolgen und entsprechende Maßnahmen eingeleitet werden. Bei der in Figur 1 gezeigten Ausführungsform ist auch eine Variante denkbar, bei der die über dem Widerstand 5 abfallende Spannung dem Steuergerät 7 zugeführt wird. Hierdurch kann der Messwiderstand 6 entfallen. Die Diagnose wird anhand des Spannungsabfalls * über dem Widerstand 5 durchgeführt. The resistor 5 thus allows independent of the position of the thermostat 5, a diagnosis of the heating of the air dryer 1. Thus, the diagnosis of a defect can take place immediately after the occurrence of the defect and appropriate action can be taken. In the embodiment shown in Figure 1, a variant is also conceivable in which the voltage drop across the resistor 5 is supplied to the control unit 7. As a result, the measuring resistor 6 can be omitted. The diagnosis is made on the basis of the voltage drop * across the resistor 5.
Vorteilhafterweise ist der Widerstand 5 so zu dimensionieren, dass der Stromfluss verursacht durch den Widerstand 5 so gering ist, dass er zu keiner nennenswerten Erwärmung des Widerstandes 5 oder des Heizelementes 3 führt. Günstige Werte des Widerstandes liegen in einem Bereich zwischen 100 Ohm - A - und 1000 Ohm für einen Widerstandswert des Heizelementes 3 in einem Bereich zwischen 0,2 Ohm und 10 Ohm. Advantageously, the resistor 5 is to be dimensioned so that the current flow caused by the resistor 5 is so small that it does not lead to any appreciable heating of the resistor 5 or the heating element 3. Favorable values of the resistance are in a range between 100 ohms - A - and 1000 ohms for a resistance of the heating element 3 in a range between 0.2 ohms and 10 ohms.
Figur 2 zeigt eine Ausführungsform der Erfindung, die sich von der in Figur 1 dargestellten bezüglich der Verschaltung des Widerstandes 5 unterscheidet. Bei dieser Ausführungsform ist der Widerstand 5 nicht parallel zum Thermostaten 4 sondern parallel zu der Serienschaltung aus Heizelement 3 und Thermostat 4 geschaltet. Die Diagnose der Heizung erfolgt anhand des Spannungsabfalls über dem Messwiderstand 6. Figure 2 shows an embodiment of the invention, which differs from that shown in Figure 1 with respect to the interconnection of the resistor 5. In this embodiment, the resistor 5 is not connected in parallel to the thermostat 4 but in parallel to the series circuit of heating element 3 and thermostat 4. The diagnosis of the heating is based on the voltage drop across the measuring resistor 6.
Die Erfindungen beinhaltet des Weiteren eine Druckluftversorgungseinrichtung mit einem erfindungsgemäßen Lufttrockner 1. Eine Druckluftversorgungseinrichtung, die den Einsatz des erfindungsgemäßen Lufttrockners 1 durch einen entsprechenden Austausch des bekannten Lufttrockners ermöglicht, ist z. B. in DE 10 2006 035 772 A1 dargestellt. The inventions further includes a compressed air supply device with an air dryer according to the invention 1. A compressed air supply device, which allows the use of the air dryer 1 according to the invention by a corresponding exchange of the known air dryer is z. B. in DE 10 2006 035 772 A1.
Eine vorteilhafte Ausführung der Erfindung sieht die Zusammenfassung des Lufttrockners 1 , der Druckluftversorgungseinrichtung und des Steuergerätes 7 in einer baulichen Einheit vor. D. h. die vorstehend genannten Komponenten wei- sen ein gemeinsames Gehäuse auf. In dieses Gehäuse kann auch der Messwiderstand 6 integriert sein. An advantageous embodiment of the invention provides the summary of the air dryer 1, the compressed air supply device and the control unit 7 in a structural unit. Ie. the aforementioned components have a common housing. In this case, the measuring resistor 6 may be integrated.

Claims

Patentansprüche claims
1. Lufttrockner (1) für ein Druckluftsystem eines Kraftfahrzeuges mit zumindest einem elektrischen Heizelement (3), gekennzeichnet durch einen elektrischen Widerstand (5) zur Diagnose der Heizfunktion des Heizelementes. 1. Air dryer (1) for a compressed air system of a motor vehicle with at least one electric heating element (3), characterized by an electrical resistance (5) for diagnosing the heating function of the heating element.
2. Lufttrockner (1) nach Anspruch 1 , gekennzeichnet durch einen Thermostaten (4) zur Betätigung des Heizelementes (3). 2. Air dryer (1) according to claim 1, characterized by a thermostat (4) for actuating the heating element (3).
3. Lufttrockner (1) nach Anspruch 2, dadurch gekennzeichnet, dass der Widerstand (5) parallel zum Thermostaten (4) geschaltet ist. 3. Air dryer (1) according to claim 2, characterized in that the resistor (5) is connected in parallel to the thermostat (4).
4. Lufttrockner (1) nach Anspruch 2, dadurch gekennzeichnet, dass der Widerstand (5) parallel zu einer Serienschaltung aus Heizelement (3) und Thermostat (4) geschaltet ist. 4. Air dryer (1) according to claim 2, characterized in that the resistor (5) is connected in parallel to a series circuit of heating element (3) and thermostat (4).
5. Lufttrockner (1) nach einem der vorherigen Ansprüche, dadurch gekennzeichnet, dass das Heizelement (3) einen Heizwiderstand oder ein thermoelektrisches Element aufweist. 5. Air dryer (1) according to one of the preceding claims, characterized in that the heating element (3) has a heating resistor or a thermoelectric element.
6. Lufttrockner (1) nach Anspruch 5, dadurch gekennzeichnet, dass der Wert des Heizwiderstandes in einem Bereich zwischen 0,2 Ohm bis 10 Ohm und der Wert des Widerstandes (5) in einem Bereich zwischen 100 Ohm und 1000 Ohm liegt. 6. Air dryer (1) according to claim 5, characterized in that the value of the heating resistor in a range between 0.2 ohms to 10 ohms and the value of the resistor (5) is in a range between 100 ohms and 1000 ohms.
7. Druckluftversorgungseinrichtung eines Kraftfahrzeuges, gekennzeichnet durch einen Lufttrockner (1) nach einem der vorherigen Ansprüche. 7. compressed air supply device of a motor vehicle, characterized by an air dryer (1) according to one of the preceding claims.
8. Druckluftversorgungseinrichtung nach Anspruch 7, gekennzeichnet durch ein Steuergerät (7) mit einem Eingang zur Erfassung der Spannung über dem Wi- derstand (5) oder des durch den Widerstand (5) fließenden Stroms. 8. Compressed air supply device according to claim 7, characterized by a control device (7) with an input for detecting the voltage across the resistor (5) or the current flowing through the resistor (5) current.
9. Druckluftversorgungseinrichtung nach Anspruch 7 oder 8, dadurch gekennzeichnet, dass der Lufttrockner (1), die Druckluftversorgungseinrichtung und das Steuergerät (7) ein gemeinsames Gehäuse aufweisen. 9. compressed air supply device according to claim 7 or 8, characterized in that the air dryer (1), the compressed air supply device and the control unit (7) have a common housing.
10. Kraftfahrzeug, gekennzeichnet durch einen Lufttrockner (1) oder eine Druckluftversorgungseinrichtung nach einem der vorherigen Ansprüche. 10. Motor vehicle, characterized by an air dryer (1) or a compressed air supply device according to one of the preceding claims.
PCT/EP2010/002667 2009-07-14 2010-05-03 Air dryer WO2011006554A1 (en)

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DE102009032953A DE102009032953A1 (en) 2009-07-14 2009-07-14 air dryer
DE102009032953.6 2009-07-14

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WO2011006554A1 true WO2011006554A1 (en) 2011-01-20
WO2011006554A8 WO2011006554A8 (en) 2011-12-01

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