EP1460349A2 - Echangeur rotatif thermique pour installation de traitement d'air - Google Patents

Echangeur rotatif thermique pour installation de traitement d'air Download PDF

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Publication number
EP1460349A2
EP1460349A2 EP04005389A EP04005389A EP1460349A2 EP 1460349 A2 EP1460349 A2 EP 1460349A2 EP 04005389 A EP04005389 A EP 04005389A EP 04005389 A EP04005389 A EP 04005389A EP 1460349 A2 EP1460349 A2 EP 1460349A2
Authority
EP
European Patent Office
Prior art keywords
rotor
heat exchanger
rotary heat
exchanger according
housing
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
EP04005389A
Other languages
German (de)
English (en)
Other versions
EP1460349A3 (fr
EP1460349B1 (fr
Inventor
Josef Dipl.-Ing. Ammann
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.)
Hoval AG
Original Assignee
Hoval AG
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Filing date
Publication date
Application filed by Hoval AG filed Critical Hoval AG
Publication of EP1460349A2 publication Critical patent/EP1460349A2/fr
Publication of EP1460349A3 publication Critical patent/EP1460349A3/fr
Application granted granted Critical
Publication of EP1460349B1 publication Critical patent/EP1460349B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • 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
    • F24F2203/1096—Rotary wheel comprising sealing means

Definitions

  • the invention relates to a rotary heat exchanger for ventilation systems.
  • Heat exchangers in ventilation and air conditioning systems are used for heat recovery and thus make an effective contribution to reducing the amount of energy required.
  • rotary heat exchangers do not work with a hermetic separation between supply and exhaust air. Due to the previously unavoidable transfer of substances and odors, they therefore currently do not meet the hygienic requirements such as those used for home ventilation.
  • the invention has for its object to propose a rotary heat exchanger which is able to meet these hygienic requirements.
  • the double flushing chamber ensures that the air ducts of the rotor are flushed with outside air when passing through the partition. This prevents exhaust air from entering the supply air flow by co-rotation. This eliminates one of the main causes of substance and odor transfer.
  • the invention is also based on the knowledge that a significant proportion of the mass and odor transfer also relates to sealing and leakage problems.
  • the sealing of the edges of the partition against the sharp-edged air ducts or honeycombs of the rotor is critical in this context.
  • the strip made of closed-cell foam is able to support the plastic belt securely but elastically in all directions, the belt with its overhanging edges forming rounded "inlet edges" that glide smoothly over the sharp edges of the rotor matrix.
  • the seal is reliable and stable.
  • the spring-like lip of the annular disk fixed to the housing does not abut the rotor matrix, but presses against a smooth surface of a ring arranged on the rotor.
  • the lip represents a continuous sealing element. Basically, a peripheral seal is sufficient.
  • the rotor will be provided with a circumferential seal on both sides.
  • the sorptive coating of the air channels of the rotor ensures that essentially only water molecules are transferred from the exhaust air flow into the supply air flow.
  • ion exchange resins are used as coating material in question. No undesirable substances or odors from the exhaust air are transferred to the supply air via the humidity.
  • the invention thus creates the possibility of meeting the highest hygienic requirements when using the rotary heat exchange, and not just for a short time, but over long periods of time.
  • the invention creates the basis for using rotary heat exchangers, which have hitherto been used for large air volumes of over 10,000 m 3 / h, also in domestic ventilation, in which air volumes of about 100 m 3 / h to about 500 m 3 / h are used , Not only are the hygienic requirements there met, but significant additional advantages are achieved compared to the plate heat exchangers previously used here.
  • moisture recovery is made possible, i.e. the use of latent heat in addition to the sensible warmth. Since this option is not available with plate heat exchangers, heat recovery rates of no more than 70% to 80% are achieved even with a small plate spacing (and a correspondingly high pressure drop).
  • the regenerative heat exchanger with sorption has a degree of heat supply of 110% to 150%.
  • the rotary heat exchanger system is less expensive than a plate heat exchanger system, even in small systems, such as those used for domestic ventilation.
  • the sorptive coating for example made of an ion exchange resin
  • the moisture recovery ie the recovery of latent heat able to reduce the transmission rate of the VOCs (volatile organic components) that usually occur in living rooms.
  • VOCs volatile organic components
  • tobacco smoke occurs in the exhaust air, there is no reduction in odor transfer in this regard.
  • the aerosols from tobacco smoke are very small (less than 1 ⁇ ) and sticky and adhere to the rotor surfaces, whereby they emit unpleasant smells for a long time.
  • Similar aerosols e.g. from other combustion processes.
  • Normal activated carbon filters are not suitable for this. They have the disadvantage that the pressure drop is too great and the tool life is too short. In addition, they become ineffective in moist exhaust air, since they become saturated with water and lose their ability to absorb odors.
  • Treated clay bodies are to be understood as those which are coated with calcium, optionally with the addition of water glass, aluminum dust, iron oxide and the like.
  • the rotor be mounted on its circumference, the drive of the rotor acting on its circumference, and that the edges of the partition wall run continuously diametrically over the end faces of the rotor.
  • the rotor In conventional rotary heat exchangers, the rotor is mounted on a central shaft, via which the drive also acts on the rotor.
  • the central shaft inevitably breaks the seals that are arranged between the rotor and the partition. In the central area of the So there is no reliable seal on both sides of the rotor.
  • the central shaft inevitably causes an axial imbalance in the rotor. The seals are therefore subjected to fluctuating loads, which cause considerable leaks after a short time.
  • the seals arranged between the rotor of the partition are also effective in the central area of the rotor.
  • the rotor works without oscillating movements, so that the seals are not subject to wear in this regard. They can therefore perform their optimal function over long periods of time. As a result, this also significantly reduces the transfer of substances and smells.
  • the favorable design of the rotary heat exchanger according to the invention also reduces its manufacturing and operating costs, so that from this point of view there is nothing to prevent use in small ventilation systems.
  • conventional rotary heat exchangers work with a belt drive that has a low transmission efficiency and is subject to wear. This results in high monitoring and maintenance costs.
  • the bearing of the rotor has at least three radially arranged rollers. This represents a reliable, simple and inexpensive construction that works with the utmost protection of the seals.
  • the ring arranged on the rotor is provided in an axial surface facing the housing-fixed annular disk with balls which run on the annular disk.
  • the rotor is therefore also supported in the axial direction to enable inclined positioning.
  • An axial bearing on both sides permits any angular position.
  • the housing-fixed, annular disc which is provided with the spring-like lip, simultaneously two functions, namely that of the rolling surface of the balls and that of the peripheral seal of the rotor.
  • the disc should consist of a plastic with high sliding properties, preferably on POM.
  • the ring arranged on the rotor is designed as a toothed ring into which a pinion or worm wheel connected to the drive engages.
  • the drive is preferably an electric motor device arranged on the circumference of the rotor.
  • the drive can advantageously be regulated in terms of speed in order to enable stepless output control of the rotary heat exchanger.
  • Figure 1 shows a part of an axial section through a schematically illustrated rotary heat exchanger according to the invention.
  • the rotary heat exchanger has a housing 1 which contains a diametrical partition 2.
  • the partition divides the housing 1 of the rotary heat exchanger into an exhaust air duct 3 and an outside air duct 4. Only the section of the partition 2 assigned to the exhaust air inlet is shown.
  • a rotor 5 is built into the partition 2 and forms a plurality of air channels 6. These have a sorptive coating.
  • the rotor 5 carries a ring 7, which in the present case is designed as a ring gear.
  • the ring gear is used to engage a pinion, not shown, which is connected to a drive which is adjustable in speed.
  • the ring 7 also serves to support the rotor 5.
  • the radial support serve at least three rollers 8, which only one is shown.
  • the axial storage takes place via balls 9, which are seated in associated openings in the ring 7. They run on an annular disk 10 fixed to the housing, which has a circumferential, spring-like lip 11.
  • the spring-like lip 11 presses against a corresponding contact surface of the ring 7 and ensures the sealing of the rotor 5 in the region of its circumference.
  • the annular disk 10 including the spring-like lip is made of POM, that is to say a material with high sliding properties.
  • FIG. 1 shows only the section of the partition wall 2 assigned to the exhaust air inlet and the associated part of the rotor 5.
  • the partition wall 2 forms a double purging chamber 12, which serves to also guide the air channels 6 when they pass from the exhaust air channel 3 into the outside air channel 4 To purge the supply air.
  • the partition 2 here forms two edges which together extend diametrically over a radius of the end face of the rotor 5. On the other half of this side and on the opposite side, only a single edge is required.
  • This and the lower edge shown in Figure 1 each carry a strip 13 made of closed-cell foam, in the present case made of PE.
  • the strips are each coated on the rotor side with a band 14 made of elastic, abrasion-resistant plastic.
  • Each band 14 is wider than the associated strip 13, so that its edges can bulge somewhat. As a result, the strips 14 slide gently over the sharp-edged edges of the air channels 6 and maintain their sealing effect even after a long running time.
  • the dividing wall 2 On the supply air side of the rotor, the dividing wall 2, as mentioned, forms a single edge which also carries a strip coated with a tape on the rotor side.
  • the sealing device 13, 14 need not be interrupted in the central area. So there can be no transfer of substances and smells. Also the rotor runs very smoothly due to its storage and its drive, so that premature, unbalanced wear cannot occur on the seals, which would otherwise promote the transfer of substances and odors.
  • the rotor 5 On the exhaust air side, the rotor 5 is preceded by a filter, not shown, which retains any aerosols derived from tobacco smoke or the like.
  • the aerosol filter can therefore be dispensed with, provided that there is definitely no tobacco smoke in the exhaust air.
  • Storage and drive can also be designed differently.
  • the housing-fixed disc with the spring-like lip is preferably formed in one piece, but can also be composed. Otherwise, the rotor can also be mounted in the partition.

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)
  • Central Air Conditioning (AREA)
EP04005389A 2003-03-07 2004-03-06 Echangeur rotatif thermique pour installation de traitement d'air Expired - Lifetime EP1460349B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10311914A DE10311914B4 (de) 2003-03-07 2003-03-07 Rotationswärmeaustauscher für raumlufttechnische Anlagen
DE10311914 2003-03-17

Publications (3)

Publication Number Publication Date
EP1460349A2 true EP1460349A2 (fr) 2004-09-22
EP1460349A3 EP1460349A3 (fr) 2006-05-17
EP1460349B1 EP1460349B1 (fr) 2009-10-21

Family

ID=32797950

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04005389A Expired - Lifetime EP1460349B1 (fr) 2003-03-07 2004-03-06 Echangeur rotatif thermique pour installation de traitement d'air

Country Status (3)

Country Link
EP (1) EP1460349B1 (fr)
AT (1) ATE446484T1 (fr)
DE (2) DE10311914B4 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2573496A1 (fr) * 2011-09-20 2013-03-27 Swegon ILTO Oy Ensemble formant rotor et unité de récupération de chaleur/énergie dotée de l'ensemble formant rotor
DE102021110902A1 (de) 2021-04-28 2022-11-03 Wolf Gmbh Rotationswärmetauscher

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2725190A1 (de) * 1976-06-16 1977-12-29 Munters Ab Carl Verfahren und vorrichtung zum reinigen staubhaltiger gase
US4235608A (en) * 1977-09-09 1980-11-25 Abc Trading Co., Ltd. Rotary-type counter-current heat exchanger
WO1988008112A1 (fr) * 1987-04-16 1988-10-20 Fläkt Ab Echangeur thermique rotatif
EP0297230A1 (fr) * 1987-05-29 1989-01-04 Kraftanlagen AG. Méthode et dispositif de dégivrage des échangeurs de chaleur et/ou de matière du type rotatif et régénératif
JPH05131577A (ja) * 1991-07-30 1993-05-28 Seibu Giken:Kk ハニカム状成形体の端面部処理強化法
DE4222348A1 (de) * 1992-07-08 1994-01-13 Duerr Gmbh & Co Luftversorgung für eine Lackieranlage
US5514035A (en) * 1994-07-07 1996-05-07 Denniston; James G. T. Desiccant based cabin windshield defog/defrost system
JPH08128792A (ja) * 1994-10-31 1996-05-21 Nippon Flaekt Kk 回転マトリクス型熱交換器
US6004384A (en) * 1998-06-03 1999-12-21 Bry-Air, Inc. Rotary adsorption apparatus
EP1138368A2 (fr) * 2000-03-30 2001-10-04 Nichias Corporation Rotor et dispositif d'étanchéité pour un adsorbeur rotatif

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51110746A (fr) * 1975-03-25 1976-09-30 Nissan Motor
JPS55131693A (en) * 1979-04-03 1980-10-13 Nissan Motor Co Ltd Structure of seal for rotary heat accumulating type heat exchanger
US4399863A (en) * 1981-12-21 1983-08-23 Institute Of Gas Technology Floating seal system for rotary devices
GB2129533A (en) * 1982-08-26 1984-05-16 Babcock Woodall Duckham Ltd Rotary regenerative heat exchanger

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2725190A1 (de) * 1976-06-16 1977-12-29 Munters Ab Carl Verfahren und vorrichtung zum reinigen staubhaltiger gase
US4235608A (en) * 1977-09-09 1980-11-25 Abc Trading Co., Ltd. Rotary-type counter-current heat exchanger
WO1988008112A1 (fr) * 1987-04-16 1988-10-20 Fläkt Ab Echangeur thermique rotatif
EP0297230A1 (fr) * 1987-05-29 1989-01-04 Kraftanlagen AG. Méthode et dispositif de dégivrage des échangeurs de chaleur et/ou de matière du type rotatif et régénératif
JPH05131577A (ja) * 1991-07-30 1993-05-28 Seibu Giken:Kk ハニカム状成形体の端面部処理強化法
DE4222348A1 (de) * 1992-07-08 1994-01-13 Duerr Gmbh & Co Luftversorgung für eine Lackieranlage
US5514035A (en) * 1994-07-07 1996-05-07 Denniston; James G. T. Desiccant based cabin windshield defog/defrost system
JPH08128792A (ja) * 1994-10-31 1996-05-21 Nippon Flaekt Kk 回転マトリクス型熱交換器
US6004384A (en) * 1998-06-03 1999-12-21 Bry-Air, Inc. Rotary adsorption apparatus
EP1138368A2 (fr) * 2000-03-30 2001-10-04 Nichias Corporation Rotor et dispositif d'étanchéité pour un adsorbeur rotatif

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN Bd. 017, Nr. 507 (M-1479), 13. September 1993 (1993-09-13) & JP 05 131577 A (SEIBU GIKEN:KK; others: 01), 28. Mai 1993 (1993-05-28) *
PATENT ABSTRACTS OF JAPAN Bd. 1996, Nr. 09, 30. September 1996 (1996-09-30) & JP 08 128792 A (NIPPON FLAEKT KK), 21. Mai 1996 (1996-05-21) *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2573496A1 (fr) * 2011-09-20 2013-03-27 Swegon ILTO Oy Ensemble formant rotor et unité de récupération de chaleur/énergie dotée de l'ensemble formant rotor
DE102021110902A1 (de) 2021-04-28 2022-11-03 Wolf Gmbh Rotationswärmetauscher

Also Published As

Publication number Publication date
EP1460349A3 (fr) 2006-05-17
DE10311914B4 (de) 2005-02-17
DE10311914A1 (de) 2004-09-23
ATE446484T1 (de) 2009-11-15
DE502004010252D1 (de) 2009-12-03
EP1460349B1 (fr) 2009-10-21

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