EP1634029A1 - Rotating heat exchanger and method for sealing the same - Google Patents

Rotating heat exchanger and method for sealing the same

Info

Publication number
EP1634029A1
EP1634029A1 EP04733795A EP04733795A EP1634029A1 EP 1634029 A1 EP1634029 A1 EP 1634029A1 EP 04733795 A EP04733795 A EP 04733795A EP 04733795 A EP04733795 A EP 04733795A EP 1634029 A1 EP1634029 A1 EP 1634029A1
Authority
EP
European Patent Office
Prior art keywords
housing
air
rotor
heat exchanger
rotary heat
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.)
Granted
Application number
EP04733795A
Other languages
German (de)
French (fr)
Other versions
EP1634029B1 (en
Inventor
Norbert Struensee
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Klingenburg GmbH
Original Assignee
Klingenburg GmbH
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 Klingenburg GmbH filed Critical Klingenburg GmbH
Publication of EP1634029A1 publication Critical patent/EP1634029A1/en
Application granted granted Critical
Publication of EP1634029B1 publication Critical patent/EP1634029B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D19/00—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium
    • F28D19/04—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D19/00—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium
    • F28D19/04—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using rigid bodies, e.g. mounted on a movable carrier
    • F28D19/047—Sealing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/1411—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by absorbing or adsorbing water, e.g. using an hygroscopic desiccant
    • F24F3/1423—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification by absorbing or adsorbing water, e.g. using an hygroscopic desiccant with a moving bed of solid desiccants, e.g. a rotary wheel supporting solid desiccants
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D19/00—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D19/00—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium
    • F28D19/02—Regenerative heat-exchange apparatus in which the intermediate heat-transfer medium or body is moved successively into contact with each heat-exchange medium using granular particles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2203/00—Devices or apparatus used for air treatment
    • F24F2203/10—Rotary wheel
    • F24F2203/1032—Desiccant wheel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2203/00—Devices or apparatus used for air treatment
    • F24F2203/10—Rotary wheel
    • F24F2203/104—Heat exchanger wheel
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2203/00—Devices or apparatus used for air treatment
    • F24F2203/10—Rotary wheel
    • F24F2203/1068—Rotary wheel comprising one rotor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2203/00—Devices or apparatus used for air treatment
    • F24F2203/10—Rotary wheel
    • F24F2203/1084—Rotary wheel comprising two flow rotor segments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2203/00—Devices or apparatus used for air treatment
    • F24F2203/10—Rotary wheel
    • F24F2203/1088—Rotary wheel comprising three flow rotor segments
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2203/00—Devices or apparatus used for air treatment
    • F24F2203/10—Rotary wheel
    • F24F2203/1096—Rotary wheel comprising sealing means

Definitions

  • the invention relates to a rotary heat exchanger with a rotatably mounted rotor, which has a first flow sector for outside and supply air and a second flow sector for exhaust air and exhaust air, which it passes through during a rotation, and a housing which the rotor on surrounds its periphery, and a method for sealing such a rotary heat exchanger.
  • the invention has for its object to develop a rotary heat exchanger or a method for sealing such a rotary heat exchanger such that such leaks can no longer occur in the unwanted direction.
  • the housing surrounding the rotor on its circumference is filled with housing or sealing air, and in that the pressure of the housing or sealing air is higher than the pressure of the air flows flowing through the rotor.
  • circumferential seals can of course also be provided, by means of which the housing or sealing air flow can be reduced.
  • peripheral seals can advantageously be attached to the housing of the rotary heat exchanger.
  • the pressure of the housing or sealing air can be kept at a constant pressure level. It must be taken into account here that this constant pressure level lies above the pressure level of the air flows flowing through the rotor of the rotary heat exchanger. Alternatively, it is possible to keep the pressure of the housing or sealing air at a constant differential pressure above the pressure of the air flows flowing through the rotor. With this procedure, the amount of housing or sealing air by means of which the housing has to be acted on can be optimized, a sufficient overpressure being always available within the housing.
  • the overpressure within the housing can advantageously be generated by means of an external or internal pressure source.
  • the rotary heat exchanger includes a control and regulating device by means of which the operation of the pressure source can be controlled or regulated in accordance with the signal of a pressure sensor measuring the pressure in the housing and / or a pressure sensor measuring the pressure of the air streams flowing through the rotor.
  • the pressure level of the housing or sealing air in the housing is correspondingly controlled or regulated depending on the pressure level in the housing, which is based on a setpoint pressure, and / or on the pressure level of the air flows flowing through the rotor.
  • diametrically extending air flow separation devices are arranged on the end faces of the rotor between the two flow sectors, which are connected to the housing and can be supplied with sealing air flow by means of the housing or sealing air present in the housing.
  • a fan which is otherwise required for the airflow separation devices can be dispensed with in the case of the rotary heat exchanger according to the invention. If a flushing wedge device is provided on an end face of the rotor in that area of the flow sector for exhaust air or exhaust air which is arranged directly in front of the flow sector for outside or supply air in the direction of rotation of the rotor, which is connected to the housing and by means of the housing or sealing air in the housing can be supplied with purging air flow, a separate fan for supplying the flushing wedge device can also be dispensed with.
  • the rotary heat exchanger according to the invention is provided in accordance with an advantageous development with a temperature control device by means of which the housing or sealing air, e.g. for the purpose of protection against icing, can be tempered, any icing of the circumferential seals can be prevented, and in addition condensation in the housing can be excluded.
  • the housing or sealing air can easily be taken from the supply air and / or the outside air system of the rotary heat exchanger.
  • Nozzle devices are advantageously provided on the housing of the rotary heat exchanger according to the invention, through which housing or sealing air can be directed onto a bearing of the rotor. This allows a comparison wise little effort to keep the rotor bearing dry.
  • Figure 1 is a view of an inventive
  • FIG. 2 shows a basic illustration of air flows flowing through a rotor of the rotary heat exchanger according to the invention and of sealing and purge air flows in the rotary heat exchanger designed according to the invention.
  • a rotary heat exchanger 1 according to the invention shown in a perspective illustration in FIG. 1 has a housing 2 which is approximately square in terms of its outer contour in the embodiment shown.
  • the housing 2 surrounds a rotor 3 of the rotary heat exchanger 1 on the circumference of the former.
  • the rotor 3 has a first flow sector 4, which, as can be seen in FIG. 2, is flowed through by outside air 5 or supply air 6.
  • the air flow for the outside air 5 and the supply air 6 is shown in Figure 2 by arrows.
  • the rotor 3 has a second flow sector 7, through which exhaust air 8 and exhaust air 9 flow in the opposite direction to the outside 5 and supply air 6.
  • the through the 8 and the exhaust air 9 formed air flow is also shown in Figure 2 by arrows.
  • the rotor 3 of the rotary heat exchanger is arranged such that it can rotate about a bearing or a hub 10.
  • the direction of rotation of the rotor 3 is shown in Figure 1 and Figure 2 by the arrow 11.
  • the housing 2 is connected to a pressure source, not shown in FIGS. 1 and 2, by means of which the housing 2 is acted upon by housing or sealing air, specifically at a pressure which is higher than the pressure level in the rotor 3 flowing air streams 5, 6; 8, 9.
  • an escape of outside air 5 and supply air 6 from the rotor 3 in the radially outward direction is also prevented.
  • the sealing air flow 12 represented by arrows 12 and running radially inwards with respect to the rotor 3, enters the air flow formed from the outside 5 or supply air 6 and the air flow formed from the exhaust air 8 and exhaust air 9.
  • Circumferential seals 15, 16 are provided between the circumference of the rotor 3 and the front 13 of the housing 2 surrounding the rotor 3 and the correspondingly provided rear 14 of the housing 2, by means of which the seals which inevitably occur during operation of the rotary heat exchanger 1
  • peripheral seals 15, 16 are expediently fastened to the front 13 or to the rear 14 of the housing 2, so that the outer periphery of the rotor 3 moves with respect to these peripheral seals 15, 16.
  • the pressure of the housing or sealing air within the housing 2 is either kept at a constant pressure level, this pressure level being selected such that it is in any case above the pressure level of the air streams 5, 6; 8, 9 lies.
  • An external or an internal pressure source can be provided as the pressure source.
  • Control device to which a pressure sensor arranged in the housing 2 and a pressure sensor which detects the pressure in the outside 5 or supply air 6 and in the exhaust 8 or exhaust air 9 belong.
  • the pressure within the housing 2 is controlled or regulated in accordance with the signals from these pressure sensors.
  • a target pressure within the housing 2 or a differential pressure between the pressure in the housing 2 and the pressure within the air streams 5, 6; 8, 9 serve.
  • the rotor 3 of the rotary heat exchanger 1 is flowed through by at least one air stream which is critical with regard to its composition, it is expedient if the housing 2 is exposed to uncritical housing or sealing air.
  • the critical air flow mentioned can be diluted in such a way that dangers resulting from the composition of the critical air flow, for example explosion risk, are reduced.
  • the two air flow separation devices 19, 20 are designed as quasi-spars, the interior of which is connected to the interior of the housing 2, so that the two air flow separation devices 19, 20 are pressurized with housing or sealing air under pressure.
  • a seal air flow shown by arrows 21 emerges from the two air flow separation devices 19, 20, by means of which mixing of outside air 5 and exhaust air 9 on the end face 17 of the rotor and mixing of supply air 6 and exhaust air 8 on the end face 18 of the rotor 3 is prevented ,
  • a flushing wedge device 22 is arranged on the end face 17 of the rotor 3 below the airflow separation device 19.
  • the purge wedge device directs a purge air flow through the rotating rotor 3, represented by arrows 23, so that co-rotating air from the second flow sector 7, which is assigned to the exhaust air 8 and the exhaust air 9, is prevented from getting into the first flow sector 4 of the rotor 3, which is assigned to the outside air 5 and the supply air 6.
  • the flushing wedge device 22 is in the case of the rotary heat exchanger 1 shown in FIGS. 1 and 2 - like the two air flow separation devices 19, 20 the housing 2 is connected so that the purge air flow 23 is also fed from the housing 2 through the housing or sealing air.
  • the rotary heat exchanger 1 shown in Figures 1 and 2 is equipped with a heating device, not shown in the figures, by means of which the housing or. Sealing air can be heated.
  • a heating device not shown in the figures, by means of which the housing or. Sealing air can be heated.
  • the above-mentioned heating device is particularly expedient if icing of the rotary heat exchanger 1 is to be prevented under certain temperature conditions.
  • the housing or sealing air can be taken from the supply air system or the outside air system of the rotary heat exchanger 1.
  • the housing 2 can be provided with nozzle devices, not shown in FIGS. 1 and 2, through which the bearing or the hub 10 of the rotor 3 of the rotary heat exchanger 1 can be kept dry. This is particularly important in the case of rotary heat exchangers 1 in which the air streams 5, 6; 8, 9 are exposed to moisture.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Air Supply (AREA)

Abstract

The invention relates to a rotating heat exchanger (1) with a rotatably mounted rotor (3), comprising a first flow sector (4), for external (5) and supply air (6) and a second flow sector (7), for exhaust (8) and venting air (9), through which the above runs on rotating and a housing (2), enclosing the rotor (3) around the circumference thereof, whereby to improve the sealing of the rotor (3), the housing (2) around the circumference thereof is filled with housing or sealing air, whereby the pressure of the housing or sealing air is higher than the pressure of the airflows (5, 6; 8, 9) flowing through the rotor (3).

Description

"Rotationswärmeaustauscher und Verfahren zur Abdichtung eines solchen""Rotary heat exchanger and method for sealing such a"
Die Erfindung bezieht sich auf einen Rotationswärmeaustauscher mit einem drehbar gelagerten Rotor, der einen ersten Strömungssektor für Außen- bzw. Zuluft und einen zweiten Strömungssektor für Ab- bzw. Fortluft aufweist, die er bei einer Drehung durchläuft, und einem Gehäuse, das den Rotor an dessen Umfang umgibt, und auf ein Verfahren zur Abdichtung eines derartigen Rotationswärmeaustauschers.The invention relates to a rotary heat exchanger with a rotatably mounted rotor, which has a first flow sector for outside and supply air and a second flow sector for exhaust air and exhaust air, which it passes through during a rotation, and a housing which the rotor on surrounds its periphery, and a method for sealing such a rotary heat exchanger.
Bei bekannten derartigen Rotationswärmeaustauschern sind zwi- sehen dem Rotor und dem ihm umgebenden Gehäuse an der vorderen Stirnseite des Rotors und an der hinteren Stirnseite des Rotors Umfangsdichtungen vorgesehen, mittels denen der Austritt von Luft aus den den Rotor durchströmenden Luftströmen in das Gehäuse verhindert werden soll. Da sich der Rotor in Bezug auf das ihn umgebende Gehäuse dreht, treten im Betrieb eines derartigen Rotationswärmeaustauschers stets erhebliche Undichtigkeiten zwischen dem Rotor einerseits und dem Gehäuse andererseits auf, welche dazu führen, dass Luft aus den den Rotor durchströmenden Luftströmen aus dem Rotor austritt . Dies kann dazu führen, dass die von dem Rotationswärmeaustauscher zur Verfügung gestellte Zuluft für einen Raum in unerwünschter Weise verunreinigt wird. In known rotary heat exchangers of this type, circumferential seals are provided between the rotor and the housing surrounding it, on the front end face of the rotor and on the rear end face of the rotor, by means of which the escape of air from the air flows flowing through the rotor into the housing is to be prevented. Since the rotor rotates in relation to the housing surrounding it, considerable leaks between the rotor on the one hand and the housing on the other hand always occur during the operation of such a rotary heat exchanger, which lead to air emerging from the air flows flowing through the rotor from the rotor. This can lead to the supply air for a room being made available by the rotary heat exchanger being contaminated in an undesirable manner.
Der Erfindung liegt die Aufgabe zugrunde, einen Rotationswärmeaustauscher bzw. ein Verfahren zur Abdichtung eines derartigen Rotationswärmeaustauschers derart weiterzubilden, dass solche Leckagen in ungewollter Richtung nicht mehr auftreten können .The invention has for its object to develop a rotary heat exchanger or a method for sealing such a rotary heat exchanger such that such leaks can no longer occur in the unwanted direction.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass das den Rotor an dessen Umfang umgebende Gehäuse mit Gehäuse- bzw. Dichtungsluft gefüllt ist, und dass der Druck der Gehäuse- bzw. Dichtungsluft höher als der Druck der den Rotor durchströmenden Luftströme ist. Durch die Beaufschlagung des Gehäuses mit unter Überdruck stehender Gehäuse- bzw. Dichtungsluft wird das Druckniveau im Gehäuse stets oberhalb des Druckniveaus von den den Rotor des Rotationswärmeaustauschers durchströmenden Luftströmen gehalten. Hierdurch kann verhindert werden, dass durch das Gehäuse Außen- bzw. Zuluft mit Ab- bzw. Fortluft vermischt wird.This object is achieved according to the invention in that the housing surrounding the rotor on its circumference is filled with housing or sealing air, and in that the pressure of the housing or sealing air is higher than the pressure of the air flows flowing through the rotor. By pressurizing the housing with housing or sealing air that is under pressure, the pressure level in the housing is always kept above the pressure level by the air flows flowing through the rotor of the rotary heat exchanger. This can prevent outside and supply air from being mixed with extract and exhaust air through the housing.
Zusätzlich können im Falle des erfindungsgemäßen Rotationswärmeaustauschers selbstverständlich auch Umfangsdichtungen vorgesehen sein, mittels denen der Gehäuse- bzw. Dichtungs- luftstrom reduziert werden kann. Derartige Umfangsdichtungen sind vorteilhaft am Gehäuse des Rotationswärmeaustauschers befestigbar.In addition, in the case of the rotary heat exchanger according to the invention, circumferential seals can of course also be provided, by means of which the housing or sealing air flow can be reduced. Such peripheral seals can advantageously be attached to the housing of the rotary heat exchanger.
Der Druck der Gehäuse- bzw. Dichtungsluft kann auf einem konstanten Druckniveau gehalten werden. Hierbei muss berücksichtigt werden, dass dieses konstante Druckniveau oberhalb des Druckniveaus der den Rotor des Rotationswärmeaustauschers durchströmenden Luftströme liegt. Alternativ ist es möglich, den Druck der Gehäuse- bzw. Dichtungsluft um einen konstanten Differenzdruck über dem Druck der den Rotor durchströmenden Luftströme zu halten. Bei dieser Vorgehensweise kann die Menge der Gehäuse- bzw. Dich- tungsluft, mittels der das Gehäuse beaufschlagt werden muss, optimiert werden, wobei stets ein ausreichender Überdruck innerhalb des Gehäuses zur Verfügung steht.The pressure of the housing or sealing air can be kept at a constant pressure level. It must be taken into account here that this constant pressure level lies above the pressure level of the air flows flowing through the rotor of the rotary heat exchanger. Alternatively, it is possible to keep the pressure of the housing or sealing air at a constant differential pressure above the pressure of the air flows flowing through the rotor. With this procedure, the amount of housing or sealing air by means of which the housing has to be acted on can be optimized, a sufficient overpressure being always available within the housing.
Der Überdruck innerhalb des Gehäuses kann vorteilhaft mittels einer externen oder internen Druckquelle erzeugt werden.The overpressure within the housing can advantageously be generated by means of an external or internal pressure source.
Gemäß einer vorteilhaften Ausführungsform gehört zu dem erfindungsgemäßen Rotationswärmeaustauscher eine Steuer- und Regeleinrichtung, mittels der der Betrieb der Druckquelle entsprechend dem Signal eines den Druck im Gehäuse und/oder eines den Druck der den Rotor durchströmenden Luftströme messenden Druckfühlers Steuer- bzw. regelbar ist. Entsprechend wird das Druckniveau der Gehäuse- bzw. Dichtungsluft im Gehäuse in Abhängigkeit vom Druckniveau im Gehäuse, dem ein Solldruck zugrunde gelegt wird, und/oder vom Druckniveau der den Rotor durchströmenden Luftströme gesteuert bzw. geregelt.According to an advantageous embodiment, the rotary heat exchanger according to the invention includes a control and regulating device by means of which the operation of the pressure source can be controlled or regulated in accordance with the signal of a pressure sensor measuring the pressure in the housing and / or a pressure sensor measuring the pressure of the air streams flowing through the rotor. The pressure level of the housing or sealing air in the housing is correspondingly controlled or regulated depending on the pressure level in the housing, which is based on a setpoint pressure, and / or on the pressure level of the air flows flowing through the rotor.
Insbesondere bei solchen Einsatzorten und Anwendungsfällen, bei denen in der Abluft bzw. in der Fortluft Befrachtungen und Zusammensetzungen vorliegen, die z.B. eine Explosionsgefahr hervorrufen können, ist es vorteilhaft, wenn das Gehäuse mit unkritischer Gehäuse- bzw. Dichtungsluft beaufschlagt wird, da dann die kritischen Inhalte der Ab- bzw. Fortluft verdünnt werden können, so dass z.B. in Explosionsbereichen für Antriebsmotoren der Explosionsschutz wegfallen kann. Gemäß einer vorteilhaften Ausführungsform des erfindungsgemäßen Rotationswärmetaustauschers sind an den Stirnflächen des Rotors zwischen den beiden Strömungssektoren diametral verlaufend Luftstromtrennungseinrichtungen angeordnet, die mit dem Gehäuse verbunden und mittels der im Gehäuse vorhandenen Gehäuse- bzw. Dichtungsluft mit Dichtungsluftström versorgt werden können. Ein für die Luftstromtrennungseinrichtungen ansonsten erforderlicher Ventilator kann im Falle des erfindungsgemäßen Rotationswärmeaustauschers entfallen. Wenn an einer Stirnfläche des Rotors in demjenigen Bereich des Strömungssektors für Ab- bzw. Fortluft, der - in Drehrichtung des Rotors - unmittelbar vor dem Strömungssektor für Außen- bzw. Zuluft angeordnet ist, eine Spülkeileinrichtung vorgesehen ist, die mit dem Gehäuse verbunden und mittels der im Gehäuse vorhandenen Gehäuse- bzw. Dichtungsluft mit Spülluftstrom versorgbar ist, kann auch für einen separaten Ventilator zur Versorgung der Spülkeileinrichtung verzichtet werden.In particular, in those places of use and applications in which there are loads and compositions in the exhaust air or in the exhaust air that can, for example, create a risk of explosion, it is advantageous if the housing is exposed to uncritical housing or sealing air, since then the critical air Contents of the exhaust air or exhaust air can be diluted so that, for example, explosion protection for drive motors can be omitted. According to an advantageous embodiment of the rotary heat exchanger according to the invention, diametrically extending air flow separation devices are arranged on the end faces of the rotor between the two flow sectors, which are connected to the housing and can be supplied with sealing air flow by means of the housing or sealing air present in the housing. A fan which is otherwise required for the airflow separation devices can be dispensed with in the case of the rotary heat exchanger according to the invention. If a flushing wedge device is provided on an end face of the rotor in that area of the flow sector for exhaust air or exhaust air which is arranged directly in front of the flow sector for outside or supply air in the direction of rotation of the rotor, which is connected to the housing and by means of the housing or sealing air in the housing can be supplied with purging air flow, a separate fan for supplying the flushing wedge device can also be dispensed with.
Sofern der erfindungsgemäße Rotationswärmeaustauscher gemäß einer vorteilhaften Weiterbildung mit einer Temperiervorrichtung versehen ist, mittels der die Gehäuse- bzw. Dichtungsluft, z.B. zum Zwecke des Vereisungsschutzes, temperierbar ist, kann jedwede Vereisung der Umfangsdichtungen verhindert werden, wobei darüber hinaus eine Kondensatbildung im Gehäuse ausgeschlossen werden kann. Die Gehäuse- bzw. Dichtungsluft lässt sich in einfacher Weise der Zuluft- und/oder der Außen- luftanlage des Rotationswärmeaustauschers entnehmen.If the rotary heat exchanger according to the invention is provided in accordance with an advantageous development with a temperature control device by means of which the housing or sealing air, e.g. for the purpose of protection against icing, can be tempered, any icing of the circumferential seals can be prevented, and in addition condensation in the housing can be excluded. The housing or sealing air can easily be taken from the supply air and / or the outside air system of the rotary heat exchanger.
Vorteilhaft sind am Gehäuse des erfindungsgemäßen Rotations- Wärmeaustauschers Düseneinrichtungen vorgesehen, durch die hindurch Gehäuse- bzw. Dichtungsluft auf ein Lager des Rotors gerichtet werden kann. Hierdurch kann mit einem Vergleichs- weise geringen Aufwand das Lager des Rotors trocken gehalten werden .Nozzle devices are advantageously provided on the housing of the rotary heat exchanger according to the invention, through which housing or sealing air can be directed onto a bearing of the rotor. This allows a comparison wise little effort to keep the rotor bearing dry.
Im folgenden wird die Erfindung anhand einer Ausführungsform unter Bezugnahme auf die Zeichnung näher erläutert.The invention is explained in more detail below using an embodiment with reference to the drawing.
Es zeigen:Show it:
Figur 1 eine Ansicht eines erfindungsgemäß ausgebildetenFigure 1 is a view of an inventive
Rotationswärmeaustauschers; und Figur 2 eine prinzipielle Darstellung von einen Rotor des erfindungsgemäßen Rotationswärmeaustauschers durchströmenden Luftströmen sowie von Dichtungs- und Spülluftströmen bei dem erfindungsgemäß ausgestalteten Rotationswärmeaustauscher.rotary heat; and FIG. 2 shows a basic illustration of air flows flowing through a rotor of the rotary heat exchanger according to the invention and of sealing and purge air flows in the rotary heat exchanger designed according to the invention.
Ein in Figur 1 in perspektivischer Darstellung gezeigter erfindungsgemäßer Rotationswärmeaustauscher 1 hat ein in der dargestellten Ausführungsform hinsichtlich seiner Außenkontur etwa quadratisches Gehäuse 2.A rotary heat exchanger 1 according to the invention shown in a perspective illustration in FIG. 1 has a housing 2 which is approximately square in terms of its outer contour in the embodiment shown.
Das Gehäuse 2 umgibt einen Rotor 3 des Rotationswärmeaustauschers 1 am Umfang des ersteren.The housing 2 surrounds a rotor 3 of the rotary heat exchanger 1 on the circumference of the former.
Der Rotor 3 hat einen ersten Strömungssektor 4, der, wie aus Figur 2 hervorgeht, von Außen- 5 bzw. Zuluft 6 durchströmt wird. Der Luftstrom für die Außenluft 5 und die Zuluft 6 ist in Figur 2 durch Pfeile dargestellt.The rotor 3 has a first flow sector 4, which, as can be seen in FIG. 2, is flowed through by outside air 5 or supply air 6. The air flow for the outside air 5 and the supply air 6 is shown in Figure 2 by arrows.
Des weiteren besitzt der Rotor 3 einen zweiten Strömungssek- tor 7, der in Gegenrichtung zur Außen- 5 und Zuluft 6 von Ab- 8 und Fortluft 9 durchströmt wird. Der durch die Ab- 8 und die Fortluft 9 gebildete Luftstrom wird in Figur 2 ebenfalls durch Pfeile dargestellt.Furthermore, the rotor 3 has a second flow sector 7, through which exhaust air 8 and exhaust air 9 flow in the opposite direction to the outside 5 and supply air 6. The through the 8 and the exhaust air 9 formed air flow is also shown in Figure 2 by arrows.
Der Rotor 3 des Rotationswärmeaustauschers ist um ein Lager bzw. eine Nabe 10 drehbar angeordnet. Die Drehrichtung des Rotors 3 wird in Figur 1 und Figur 2 durch den Pfeil 11 gezeigt .The rotor 3 of the rotary heat exchanger is arranged such that it can rotate about a bearing or a hub 10. The direction of rotation of the rotor 3 is shown in Figure 1 and Figure 2 by the arrow 11.
Das Gehäuse 2 ist an eine in den Figuren 1 und 2 nicht ge- zeigte Druckquelle angeschlossen, mittels der das Gehäuse 2 mit Gehäuse- bzw. Dichtungsluft beaufschlagt wird, und zwar mit einem Druck, der höher ist, als das Druckniveau in den den Rotor 3 durchströmenden Luftströmen 5, 6; 8, 9. Hierdurch wird ein Austreten von Ab- 8 bzw. Fortluft 9 aus dem Rotor 3 in radial auswärtiger Richtung verhindert . Entsprechend wird auch ein Austreten von Außen- 5 und Zuluft 6 aus dem Rotor 3 in radial auswärtiger Richtung verhindert . Der durch Pfeile 12 dargestellte, in Bezug auf den Rotor 3 radial einwärts verlaufende Dichtungsluftstrom 12 tritt in den aus der Außen- 5 bzw. Zuluft 6 gebildeten Luftström und den aus der Ab- 8 und Fortluft 9 gebildeten Luftstrom ein. Durch das unter Ü- berdruck stehende Gehäuse 2 wird quasi eine kontrollierte Kammerluftdichtung für den Rotationswärmeaustauscher 1 geschaffen.The housing 2 is connected to a pressure source, not shown in FIGS. 1 and 2, by means of which the housing 2 is acted upon by housing or sealing air, specifically at a pressure which is higher than the pressure level in the rotor 3 flowing air streams 5, 6; 8, 9. This prevents exhaust 8 or exhaust air 9 from escaping from the rotor 3 in the radially outward direction. Correspondingly, an escape of outside air 5 and supply air 6 from the rotor 3 in the radially outward direction is also prevented. The sealing air flow 12, represented by arrows 12 and running radially inwards with respect to the rotor 3, enters the air flow formed from the outside 5 or supply air 6 and the air flow formed from the exhaust air 8 and exhaust air 9. The housing 2, which is under overpressure, creates a controlled chamber air seal for the rotary heat exchanger 1.
Zwischen dem Umfang des Rotors 3 und der den Rotor 3 umgebenden Vorderseite 13 des Gehäuses 2 sowie der entsprechend vorgesehenen Rückseite 14 des Gehäuses 2 sind jeweils Umfangs- dichtungen 15, 16 vorgesehen, mittels denen die im Betrieb des Rotationswärmeaustauschers 1 zwangsläufig auftretendenCircumferential seals 15, 16 are provided between the circumference of the rotor 3 and the front 13 of the housing 2 surrounding the rotor 3 and the correspondingly provided rear 14 of the housing 2, by means of which the seals which inevitably occur during operation of the rotary heat exchanger 1
Undichtigkeiten zwischen dem Gehäuse 2 einerseits und dem Rotor 3 andererseits möglichst gering gehalten werden sollen. Diese Umfangsdichtungen 15, 16 sind zweckmäßigerweise an der Vorderseite 13 bzw. an der Rückseite 14 des Gehäuses 2 befestigt, so dass sich der Außenumfang des Rotors 3 in Bezug auf diese Umfangsdichtungen 15, 16 bewegt.Leaks between the housing 2 on the one hand and the rotor 3 on the other hand should be kept as low as possible. These peripheral seals 15, 16 are expediently fastened to the front 13 or to the rear 14 of the housing 2, so that the outer periphery of the rotor 3 moves with respect to these peripheral seals 15, 16.
Der Druck der Gehäuse- bzw. Dichtungsluft innerhalb des Gehäuses 2 wird entweder auf einem konstanten Druckniveau gehalten, wobei dieses Druckniveau so gewählt ist, dass es in jedem Fall oberhalb des Druckniveaus der den Rotor 3 durch- strömenden Luftstrδme 5, 6; 8, 9 liegt. Alternativ ist es möglich, den Druck der Gehäuse- bzw. Dichtungsluft innerhalb des Gehäuses 2 so zu steuern bzw. zu regeln, dass dieser Druck immer um einen vorgebbaren Differenzdruck oberhalb des Druckniveaus in den Luftströmen 5, 6; 8, 9 liegt, die den Ro- tor 3 durchströmen.The pressure of the housing or sealing air within the housing 2 is either kept at a constant pressure level, this pressure level being selected such that it is in any case above the pressure level of the air streams 5, 6; 8, 9 lies. Alternatively, it is possible to control or regulate the pressure of the housing or sealing air within the housing 2 in such a way that this pressure is always a predetermined differential pressure above the pressure level in the air streams 5, 6; 8, 9 lies, which flow through the rotor 3.
Als Druckquelle kann eine externe oder eine interne Druckquelle vorgesehen sein.An external or an internal pressure source can be provided as the pressure source.
Mittels einer in den Figuren nicht dargestellten Steuer- undBy means of a control and not shown in the figures
Regelvorrichtung, zu der ein im Gehäuse 2 angeordneter Druckfühler und ein den Druck in der Außen- 5 bzw. Zuluft 6 sowie in der Ab- 8 bzw. Fortluft 9 erfassender Druckfühler gehört. Entsprechend den Signalen dieser Druckfühler wird der Druck innerhalb des Gehäuses 2 gesteuert bzw. geregelt. Hierbei kann als Zielgröße ein Solldruck innerhalb des Gehäuses 2 o- der aber ein Differenzdruck zwischen dem Druck im Gehäuse 2 und dem Druck innerhalb der Luftströme 5, 6; 8, 9 dienen.Control device to which a pressure sensor arranged in the housing 2 and a pressure sensor which detects the pressure in the outside 5 or supply air 6 and in the exhaust 8 or exhaust air 9 belong. The pressure within the housing 2 is controlled or regulated in accordance with the signals from these pressure sensors. Here, a target pressure within the housing 2 or a differential pressure between the pressure in the housing 2 and the pressure within the air streams 5, 6; 8, 9 serve.
Sofern der Rotor 3 des Rotationswärmeaustauschers 1 von zumindest einem hinsichtlich seiner Zusammensetzung kritischen Luftstrom durchströmt wird, ist es zweckmäßig, wenn das Ge- häuse 2 mit unkritischer Gehäuse- bzw. Dichtungsluft beaufschlagt wird. Mittels dieser unkritischen Gehäuse- bzw. Dichtungsluft kann der genannte kritische Luftstrom so verdünnt werden, dass aus der Zusammensetzung des kritischen Luft- Stroms resultierende Gefahren, z.B. Explosionsgefahr, reduziert werden.If the rotor 3 of the rotary heat exchanger 1 is flowed through by at least one air stream which is critical with regard to its composition, it is expedient if the housing 2 is exposed to uncritical housing or sealing air. By means of this uncritical housing or sealing air, the critical air flow mentioned can be diluted in such a way that dangers resulting from the composition of the critical air flow, for example explosion risk, are reduced.
An den beiden Stirnflächen 17, 18 des Rotors 3 ist jeweils eine sich waagerecht und diametral über den Rotor 3 erstre- ckende LuftStromtrennungseinrichtung 19 bzw. 20 vorgesehen. Die beiden LuftStromtrennungseinrichtungen 19, 20 sind quasi als Mittenholme ausgebildet, deren Innenraum in Verbindung mit dem Innenraum des Gehäuses 2 steht, so dass die beiden LuftStromtrennungseinrichtungen 19, 20 mit unter Überdruck stehender Gehäuse- bzw. Dichtungsluft beaufschlagt werden. Aus den beiden LuftStromtrennungseinrichtungen 19, 20 tritt ein durch Pfeile 21 gezeigter Dichtungsluftstrom aus, mittels dem an der Stirnfläche 17 des Rotors eine Vermischung von Außenluft 5 und Fortluft 9 und an der Stirnfläche 18 des Rotors 3 eine Vermischung von Zuluft 6 und Abluft 8 verhindert wird.On the two end faces 17, 18 of the rotor 3, an air flow separation device 19 or 20, which extends horizontally and diametrically over the rotor 3, is provided. The two air flow separation devices 19, 20 are designed as quasi-spars, the interior of which is connected to the interior of the housing 2, so that the two air flow separation devices 19, 20 are pressurized with housing or sealing air under pressure. A seal air flow shown by arrows 21 emerges from the two air flow separation devices 19, 20, by means of which mixing of outside air 5 and exhaust air 9 on the end face 17 of the rotor and mixing of supply air 6 and exhaust air 8 on the end face 18 of the rotor 3 is prevented ,
Darüber hinaus ist an der Stirnfläche 17 des Rotors 3 unterhalb der Luftstromtrennungseinrichtung 19 eine Spülkeileinrichtung 22 angeordnet. Die Spülkeileinrichtung richtet einen durch Pfeile 23 dargestellten Spülluftstrom durch den sich drehenden Rotor 3, so dass verhindert wird, dass Mitrotationsluft aus dem zweiten Strömungssektor 7, der der Abluft 8 und der Fortluft 9 zugeordnet ist, in den ersten Strömungssektor 4 des Rotors 3 gerät, der der Außenluft 5 und der Zu- luft 6 zugeordnet ist. Die Spülkeileinrichtung 22 ist bei dem in den Figuren 1 und 2 gezeigten Rotationswärmeaustauscher 1 - wie die beiden Luftstromtrennungseinrichtungen 19, 20 an das Gehäuse 2 angeschlossen, so dass auch der Spülluftstrom 23 durch die Gehäuse- bzw. Dichtungsluft aus dem Gehäuse 2 gespeist wird.In addition, a flushing wedge device 22 is arranged on the end face 17 of the rotor 3 below the airflow separation device 19. The purge wedge device directs a purge air flow through the rotating rotor 3, represented by arrows 23, so that co-rotating air from the second flow sector 7, which is assigned to the exhaust air 8 and the exhaust air 9, is prevented from getting into the first flow sector 4 of the rotor 3, which is assigned to the outside air 5 and the supply air 6. The flushing wedge device 22 is in the case of the rotary heat exchanger 1 shown in FIGS. 1 and 2 - like the two air flow separation devices 19, 20 the housing 2 is connected so that the purge air flow 23 is also fed from the housing 2 through the housing or sealing air.
Des weiteren ist der in den Figuren 1 und 2 gezeigte Rotationswärmeaustauscher 1 mit einer in den Figuren nicht gezeigten Heizvorrichtung ausgerüstet, mittels der die Gehäusebzw. Dichtungsluft aufgeheizt werden kann. Es kann jedoch bei bestimmten Anforderungen auch zweckmäßig sein, allgemein eine Temperiervorrichtung vorzusehen, mittels der die Temperatur der Gehäuse- bzw. Dichtungsluft innerhalb des Gehäuses 2 beliebig temperiert werden kann. Die vorstehend erwähnte Heizvorrichtung ist insbesondere dann zweckmäßig, wenn bei bestimmten Temperaturverhältnissen eine Vereisung des Rotati- onswärmeaustauschers 1 verhindert werden soll.Furthermore, the rotary heat exchanger 1 shown in Figures 1 and 2 is equipped with a heating device, not shown in the figures, by means of which the housing or. Sealing air can be heated. However, it can also be expedient for certain requirements to generally provide a temperature control device by means of which the temperature of the housing or sealing air within the housing 2 can be temperature-controlled as desired. The above-mentioned heating device is particularly expedient if icing of the rotary heat exchanger 1 is to be prevented under certain temperature conditions.
Die Gehäuse- bzw. Dichtungsluft kann der Zuluftanlage oder der Außenluftanlage des Rotationswärmeaustauschers 1 entnommen werden.The housing or sealing air can be taken from the supply air system or the outside air system of the rotary heat exchanger 1.
Das Gehäuse 2 kann mit in den Figuren 1 und 2 nicht gezeigten Düseneinrichtungen versehen sein, durch die hindurch das Lager bzw. die Nabe 10 des Rotors 3 des Rotationswärmeaustauschers 1 trocken gehalten werden kann. Dies ist insbesondere bei solchen Rotationswärmeaustauschern 1 von besonderer Bedeutung, bei denen die den Rotor 3 durchströmenden Luftströme 5, 6; 8, 9 feuchtigkeitsbeaufschlagt sind. The housing 2 can be provided with nozzle devices, not shown in FIGS. 1 and 2, through which the bearing or the hub 10 of the rotor 3 of the rotary heat exchanger 1 can be kept dry. This is particularly important in the case of rotary heat exchangers 1 in which the air streams 5, 6; 8, 9 are exposed to moisture.

Claims

P A T E N T A N S P R Ü C H E PATENT CLAIMS
1. Rotationswärmeaustauscher (1), mit einem drehbar gelagerten Rotor (3) , der einen ersten Strömungssektor (4) für Außen- (5) bzw. Zuluft (6) und einen zweiten Strömungssektor (7) für Ab- (8) bzw. Fortluft (9) aufweist, die er bei einer Drehung durchläuft, und einem Gehäuse (2) , das den Rotor (3) an dessen Umfang umgibt, dadurch gekennzeichnet, dass das den Rotor (3) an dessen Umfang umgebende Gehäuse (2) mit Gehäuse- bzw. Dichtungsluft gefüllt ist, und dass der Druck der Gehäuse- bzw. Dichtungsluft höher als der Druck der den Rotor (3) durch- strömenden Luftströme (5, 6; 8, 9) ist.1. Rotary heat exchanger (1), with a rotatably mounted rotor (3), which has a first flow sector (4) for outside (5) or supply air (6) and a second flow sector (7) for exhaust (8) or Exhaust air (9), which it passes through during a rotation, and a housing (2) which surrounds the rotor (3) on its periphery, characterized in that the housing (2) surrounding the rotor (3) on its periphery with Housing or sealing air is filled, and that the pressure of the housing or sealing air is higher than the pressure of the air flows (5, 6; 8, 9) flowing through the rotor (3).
2. Rotationswärmeaustauscher nach Anspruch 1, bei dem zwischen dem Umfang des Rotors (3) einerseits und dem Gehäuse (2) andererseits Umfangsdichtungen (15, 16) ange- ordnet sind.2. Rotary heat exchanger according to claim 1, wherein peripheral seals (15, 16) are arranged between the circumference of the rotor (3) on the one hand and the housing (2) on the other hand.
3. Rotationswärmeaustauscher nach Anspruch 2, bei dem die Umfangsdichtungen (15, 16) am Gehäuse (2) befestigt sind.3. Rotary heat exchanger according to claim 2, wherein the peripheral seals (15, 16) on the housing (2) are attached.
4. Rotationswärmetaustauscher nach einem der Ansprüche 1 bis 3, bei dem der Druck der Gehäuse- bzw. Dichtungsluft auf einem konstanten Druckniveau haltbar ist .4. Rotary heat exchanger according to one of claims 1 to 3, in which the pressure of the housing or sealing air is stable at a constant pressure level.
5. Rotationswärmeaustauscher nach einem der Ansprüche 1 bis 3, bei dem der Druck der Gehäuse- bzw. Dichtungsluft mit einem konstanten Differenzdruck über dem Druck der den Rotor (3) durchströmenden Luftströme (5, 6; 8, 9) haltbar ist.5. Rotary heat exchanger according to one of claims 1 to 3, in which the pressure of the housing or sealing air with a constant differential pressure above the pressure the air flows (5, 6; 8, 9) flowing through the rotor (3) can be kept.
6. Rotationswärmeaustauscher nach einem der Ansprüche 1 bis 5, mit einer externen oder internen Druckquelle, mittels der der Überdruck im Gehäuse (2) erzeugbar ist.6. Rotary heat exchanger according to one of claims 1 to 5, with an external or internal pressure source, by means of which the excess pressure in the housing (2) can be generated.
7. Rotationswärmeaustauscher nach einem der Ansprüche 1 bis 6, mit einer Steuer- und Regelvorrichtung, mittels der der Betrieb der Druckquelle entsprechend dem Signal eines den Druck im Gehäuse (2) und/oder eines den Druck der den Rotor (3) durchströmenden Luftströme (5, 6; 8, 9) messenden Druckfühlers Steuer- bzw. regelbar ist.7. Rotary heat exchanger according to one of claims 1 to 6, with a control and regulating device, by means of which the operation of the pressure source according to the signal of a pressure in the housing (2) and / or a pressure of the air flows flowing through the rotor (3) ( 5, 6; 8, 9) measuring pressure sensor is controllable.
8. Rotationswärmeaustauscher nach einem der Ansprüche 1 bis 7, dessen Gehäuse (2) mit unkritischer Gehäusebzw. Dichtungsluft beaufschlagbar ist.8. Rotary heat exchanger according to one of claims 1 to 7, the housing (2) with uncritical housing resp. Sealing air can be acted upon.
9. Rotationswärmeaustauscher nach einem der Ansprüche 1 bis 8, mit an den Stirnflächen (17, 18) des Rotors (3) zwischen den beiden Strömungssektoren (4, 7) diametral verlaufend angeordneten Luftstromtrennungseinrichtungen (19, 20), die mit dem Gehäuse (2) verbunden und mittels der im Gehäuse (2) vorhandenen Gehäuse- bzw. Dichtungs- luft mit Dichtungsluftstrom (21) versorgbar sind.9. Rotary heat exchanger according to one of claims 1 to 8, with on the end faces (17, 18) of the rotor (3) between the two flow sectors (4, 7) arranged diametrically extending air flow separation devices (19, 20) which with the housing (2 ) and can be supplied with sealing air flow (21) by means of the housing or sealing air in the housing (2).
10. Rotationswärmeaustauscher nach einem der Ansprüche 1 bis 9, bei dem an einer Stirnfläche (17) des Rotors (3) in demjenigen Bereich des Strömungssektors (7) für Ab- (8) bzw. Fortluft (9) , der - in Drehrichtung (11) des Rotors (3) - unmittelbar vor dem Strömungssektor (4) für Außen- (5) bzw. Zuluft (6) angeordnet ist, eine Spülkeileinrichtung (22) vorgesehen ist, die mit dem Gehäuse (2) verbunden und mittels der im Gehäuse (2) vorhandenen Gehäuse- bzw. Dichtungsluft mit Spülluft- ström (23) versorgbar ist.10. Rotary heat exchanger according to one of claims 1 to 9, in which on an end face (17) of the rotor (3) in that area of the flow sector (7) for exhaust air (8) or exhaust air (9) which - in the direction of rotation ( 11) of the rotor (3) - immediately before the flow sector (4) for outside (5) or supply air (6), one Purge wedge device (22) is provided which is connected to the housing (2) and can be supplied with purging air flow (23) by means of the housing or sealing air present in the housing (2).
11. Rotationswärmeaustauscher nach einem der Ansprüche 1 bis 10, mit einer Temperiervorrichtung, mittels der die Gehäuse- bzw. Dichtungsluft, z.B. zum Zwecke des Vereisungsschutzes, temperierbar ist.11. Rotary heat exchanger according to one of claims 1 to 10, with a temperature control device by means of which the housing or sealing air, e.g. can be tempered for the purpose of protection against icing.
12. Rotationswärmeaustauscher nach einem der Ansprüche 1 bis 11, bei dem die Gehäuse- bzw. Dichtungsluft der Zuluft- und/oder der Außenluftanlage des Rotationswärmeaustauschers (1) entnehmbar ist.12. Rotary heat exchanger according to one of claims 1 to 11, wherein the housing or sealing air of the supply air and / or the outside air system of the rotary heat exchanger (1) can be removed.
13. Rotationswärmeaustauscher nach einem der Ansprüche 1 bis 12, bei dem am Gehäuse (2) Düseneinrichtungen vorgesehen sind, durch die hindurch Gehäuse- bzw. Dichtungsluft auf ein Lager (10) des Rotors (3) richtbar ist.13. Rotary heat exchanger according to one of claims 1 to 12, in which on the housing (2) nozzle devices are provided, through which the housing or sealing air can be directed onto a bearing (10) of the rotor (3).
14. Verfahren zur Abdichtung eines Rotationswärmeaustauschers (1) , dadurch gekennzeichnet, dass ein einen Rotor (3) des Rotationswärmeaustauschers (1) am Umfang des Rotors (3) umgebendes Gehäuse (2) mit Gehäuse- bzw. Dichtungsluft beaufschlagt und der Druck der Gehäusebzw. Dichtungsluft im Gehäuse (2) oberhalb des Druckniveaus von den Rotor (3) des Rotationswärmeaustauschers (1) durchströmenden Luftströmen (5, 6; 8, 9) gehalten wird. 14. A method for sealing a rotary heat exchanger (1), characterized in that a rotor (3) of the rotary heat exchanger (1) on the circumference of the rotor (3) surrounding the housing (2) with housing or sealing air and the pressure of the housing or , Sealing air is held in the housing (2) above the pressure level by air flows (5, 6; 8, 9) flowing through the rotor (3) of the rotary heat exchanger (1).
15. Verfahren nach Anspruch 14, bei dem das Druckniveau der Gehäuse- bzw. Dichtungsluft im Gehäuse (2) konstant gehalten wird.15. The method according to claim 14, wherein the pressure level of the housing or sealing air in the housing (2) is kept constant.
16. Verfahren nach Anspruch 14, bei dem das Druckniveau der Gehäuse- bzw. Dichtungsluft im Gehäuse (2) um einen konstanten Differenzdruck oberhalb des Druckniveaus er den Rotor (3) durchströmenden Luftströme (5, 6; 8, 9) gehalten wird.16. The method according to claim 14, wherein the pressure level of the housing or sealing air in the housing (2) by a constant differential pressure above the pressure level he the rotor (3) flowing air flows (5, 6; 8, 9) is kept.
17. Verfahren nach einem der Ansprüche 14 bis 16, bei dem das Druckniveau der Gehäuse- bzw. Dichtungsluft im Gehäuse (2) in Abhängigkeit vom Druckniveau im Gehäuse17. The method according to any one of claims 14 to 16, wherein the pressure level of the housing or sealing air in the housing (2) in dependence on the pressure level in the housing
(2) und/oder vom Druckniveau der den Rotor (3) durch- strömenden Luftströme (5, 6; 8, 9) gesteuert bzw. geregelt wird.(2) and / or is controlled or regulated by the pressure level of the air flows (5, 6; 8, 9) flowing through the rotor (3).
18. Verfahren nach einem der Ansprüche 14 bis 17, bei dem das Gehäuse (2) mit unkritischer Gehäuse- bzw. Dich- tungsluft beaufschlagt wird.18. The method according to any one of claims 14 to 17, in which the housing (2) is acted upon by uncritical housing or sealing air.
19. Verfahren nach einem der Ansprüche 14 bis 18, bei dem an den Stirnflächen (17, 18) des Rotors (3) angeordnete Luftstromtrennungseinrichtungen (19, 20) aus dem Gehäu- se (2) mit Gehäuse- bz;w. Dichtungsluft versorgt werden.19. The method according to any one of claims 14 to 18, in which on the end faces (17, 18) of the rotor (3) arranged air flow separation devices (19, 20) from the housing (2) with housing or. Seal air are supplied.
20. Verfahren nach einem der Ansprüche 14 bis 19, bei dem eine Spülkeileinrichtung (22) des Rotors (3) aus dem Gehäuse (2) mit Gehäuse- bzw. Dichtungsluft als Spül- luft versorgt wird. 20. The method according to any one of claims 14 to 19, wherein a flushing wedge device (22) of the rotor (3) from the housing (2) is supplied with housing or sealing air as flushing air.
21. Verfahren nach einem der Ansprüche 14 bis 20, bei dem die Gehäuse- bzw. Dichtungsluft temperiert wird.21. The method according to any one of claims 14 to 20, in which the housing or sealing air is tempered.
22. Verfahren nach einem der Ansprüche 14 bis 21, bei dem die Gehäuse- bzw. Dichtungsluft der Zuluft- und/oder22. The method according to any one of claims 14 to 21, wherein the housing or sealing air of the supply air and / or
Außenluftanlage des Rotationswärmeaustauschers (1) entnommen wird.Outside air system of the rotary heat exchanger (1) is removed.
23. Verfahren nach einem der Ansprüche 14 bis 22, bei dem Lager (10) des Rotors (3) von Gehäuse- bzw. Dichtungs- luft beaufschlagt werden. 23. The method according to any one of claims 14 to 22, in which bearings (10) of the rotor (3) are acted upon by housing or sealing air.
EP04733795.1A 2003-06-13 2004-05-19 Rotating heat exchanger and method for sealing the same Expired - Lifetime EP1634029B1 (en)

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WO2004111563A1 (en) 2004-12-23
CN1802548B (en) 2010-05-12
KR101105373B1 (en) 2012-01-16
JP4469848B2 (en) 2010-06-02
JP2006527350A (en) 2006-11-30
US7849913B2 (en) 2010-12-14
US20060278364A1 (en) 2006-12-14
KR20060019570A (en) 2006-03-03
CN1802548A (en) 2006-07-12
DE10327078A1 (en) 2004-12-30
EP1634029B1 (en) 2017-08-30

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