EP0256306B1 - Verdunstungsbefeuchter - Google Patents

Verdunstungsbefeuchter Download PDF

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Publication number
EP0256306B1
EP0256306B1 EP87110076A EP87110076A EP0256306B1 EP 0256306 B1 EP0256306 B1 EP 0256306B1 EP 87110076 A EP87110076 A EP 87110076A EP 87110076 A EP87110076 A EP 87110076A EP 0256306 B1 EP0256306 B1 EP 0256306B1
Authority
EP
European Patent Office
Prior art keywords
humidifier
air
vaporising
flow
humidifier according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87110076A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0256306A3 (en
EP0256306A2 (de
Inventor
Helmut Wulz
Klaus Maissen
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.)
Defensor AG
Original Assignee
Defensor AG
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 Defensor AG filed Critical Defensor AG
Publication of EP0256306A2 publication Critical patent/EP0256306A2/de
Publication of EP0256306A3 publication Critical patent/EP0256306A3/de
Application granted granted Critical
Publication of EP0256306B1 publication Critical patent/EP0256306B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F6/00—Air-humidification, e.g. cooling by humidification
    • F24F6/02—Air-humidification, e.g. cooling by humidification by evaporation of water in the air
    • F24F6/04—Air-humidification, e.g. cooling by humidification by evaporation of water in the air using stationary unheated wet elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F6/00—Air-humidification, e.g. cooling by humidification
    • F24F6/12—Air-humidification, e.g. cooling by humidification by forming water dispersions in the air
    • F24F6/16—Air-humidification, e.g. cooling by humidification by forming water dispersions in the air using rotating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/108—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F6/00—Air-humidification, e.g. cooling by humidification
    • F24F6/02—Air-humidification, e.g. cooling by humidification by evaporation of water in the air
    • F24F6/06—Air-humidification, e.g. cooling by humidification by evaporation of water in the air using moving unheated wet elements
    • F24F2006/065—Air-humidification, e.g. cooling by humidification by evaporation of water in the air using moving unheated wet elements using slowly rotating discs for evaporation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/12—Details or features not otherwise provided for transportable

Definitions

  • the invention relates to an evaporative humidifier of the type specified in the preamble of claim 1.
  • Evaporation humidifiers in which a humidifier part through which the air flows are kept wetted by water droplets generated by a rotating centrifugal body, are already known in several designs.
  • evaporation humidifiers are known from GB-A-934432 and US-A-3348821, in which the humidifier part also has the task of removing impurities from the air.
  • water drops With the humidified air, however, water drops also escape from these evaporation humidifiers, and it is shown that the discharge of humidification water increases with continued operation, which leads to an undesirable and disruptive precipitation in the vicinity of the same. The reason for this increase is likely to be a nucleation in the surface tension of the dampening water circulating in the evaporative humidifier.
  • the object of the invention is to provide an evaporative humidifier which generates a sufficiently drip-free air flow without impairing the performance and without increasing the dimensions of the same.
  • a drip catcher is also provided in the humidifier known from US Pat. No. 3,348,821, which surrounds a centrifugal disc driven in common with a fan wheel in a coaxial position.
  • the stationary drip catcher has an annular surface of decreasing diameter which is acted upon by the flow and, together with the centrifugal disc, delimits an annular air duct.
  • the humidification for part of the conveyed air takes place simultaneously with the flow deflection on the ring surface.
  • the part flowing through the air duct takes small drops with it, which traverse it in the direction of the ring surface. Unless they evaporate, these drops are taken to the ring made of porous material in the direction of flow and collected there.
  • the drip therefore does not have the task of to keep the escaping air flow free of aerosols, but rather to direct impinging drops to the ring made of porous material, which is responsible for humidifying a second part of the air. Since, after a certain saturation of the porous material, drops can be entrained and carried away by the air stream, the air emerging from the humidifier is not free of aerosols.
  • FIG. 1 in the drawing denotes a rectangular base plate which on the one hand carries an inlet grille 2 approximately square in plan and on the other hand a storage container 3 for dampening water.
  • a cover 4 is supported on the inlet grille 2 with an air outlet grille 5 pointing upwards and a central support 6.
  • An external rotor motor 7 is fastened to the support 6 and carries on its periphery a radial fan wheel 8 and a spray part 9 which is coaxial to the downward and which in turn carries a conveying means 10.
  • the spray part 9 is surrounded by a humidifier part 11.
  • An air filter 12 is arranged between the humidifier part 11 and the inlet grille 2.
  • Base plate 1, inlet grille 2 and cover 4 together form a housing.
  • the storage container 3 which stands on a base part 1b of the base plate 1, has on its underside an outlet connection 13 which engages in a depression 14 in the base part 1b.
  • the outlet port 13 is controlled by a spring-loaded poppet valve 16, which is always open in the operating position of the storage container.
  • the storage container 3 is provided in a manner not shown with an airtight sealable filling opening.
  • the base plate 1 adjoins the base part 1b to form a square base part 1a, which is bordered by a rib 1c.
  • An open, slightly downwardly inclined fresh water channel 19 runs from the recess 14 into the bottom part 1a and into a water sink 20 which is approximately coaxial with the conveying means 10, the bottom part 1a also being inclined downwards towards the latter.
  • An annular groove 21 which intersects the channel 19 and is deeper than the latter is provided in the bottom part 1a concentrically with the water sink 20.
  • a water filter 22 is arranged in the annular groove 21.
  • the bottom part 1a has a collar 23 with a passage opening 24.
  • the conveying means 10 is formed by a sleeve 10a which is arranged inside the collar 23 and engages in the water sink 20.
  • the sleeve 10a widens conically upwards and is designed as a tube 9a Spray part 9 detachably, preferably plugged into this.
  • a plurality of guide grooves can run, which lie in the axial planes of the sleeve.
  • the tube 9a which widens slightly conically at the top, has on its inside open distribution grooves 32, which are evenly distributed around the circumference in the longitudinal direction of the tube and open out at a flanged edge 33 designed as a helical line.
  • the tube 9a engages in the hub 53 of the fan wheel 8 to produce a rotary connection and is detachably, preferably pluggably, connected thereto.
  • annular air washer chamber 40 is provided, which extends over the height of the humidifier part 11.
  • the humidifier part 11 is formed by a stack of plate-shaped, annular plates 41 which are perforated. The stack rests on an annular circumferential bead 42 of the base plate 1 and extends up to a bead 44 on a separating plate 43.
  • the plates 41 of the stack can be detachably connected to one another by suitable connecting elements, not shown, in order to enable cleaning of the individual plates in a disassembled state of the stack in a simple manner.
  • the water reservoir 3 only releases as much water through the nozzle 13 in order to keep the level in the water sink 20 at a certain level to keep constant. If the storage container 3 is lifted from the base part 16 of the base plate 1, the poppet valve 16 closes automatically. Likewise, this valve 16 only opens again when the container is placed on the base plate.
  • the partition plate 43 which forms an inlet 51 to the radial fan wheel 8, is integrally connected to the inlet grille 2 and centered in the base plate by means of conical support ribs 46.
  • the air filter 12 which covers the four sides of the entrance grille 2 e.g. Covered as a coherent mat, wraps around the humidifier part 11 and is supported on it, spatially oriented to the inlet grille 2.
  • the air drawn in is subjected to a first cleaning as it passes through the air filter 12 and then passes between the plates 41 of the humidifier part, where it absorbs moisture.
  • the air in the humidifier part 11 receives from the plate surfaces 41, it can also absorb further moisture in the air washing chamber 40, which is generally flowed through transversely to the spraying direction of the water.
  • the cleaned and humidified air is blown into space by the radial fan wheel 8 via an outlet chamber 59 formed in the cover 4 and the outlet grille 5.
  • a drip catcher which is generally designated 60, is installed between the latter and the radial fan wheel 8.
  • This drip catcher 60 which is connected directly upstream of the passage 52 formed between the inlet 51 and the wheel hub 53, comprises a plurality of rings 61 which are coaxial to one another.
  • the rings 61 which delimit air ducts 66 between them, are each among themselves by a plurality of radial ribs distributed around the circumference 62 connected.
  • the innermost ring 61 in turn has radially inwardly directed ribs 63, which establish the connection to a driving sleeve 64.
  • the rings 61 are detachably connected to the extension 35 of the tube 9a via the driving sleeve 64 and are driven by the latter.
  • the rings 61 each have a conical part 61a and a cylindrical part 61b in cross-section, the diameter of each ring 61 decreasing starting from the cylindrical part. While the cylindrical parts of the rings face the air-washing chamber 40 designed as a collecting chamber, the conical parts thereof point in the direction of the passage 52.
  • the cylindrical part 61b of the outermost ring 61 carries one on its outside Flange 61c, which overlaps the uppermost plate 41 of the plate stack. On the other hand, the cylindrical parts 61b of the rings 61 engage in the plate stack or in the uppermost plate 41. A labyrinth seal 65 is thus effective between the outermost ring 61 and the uppermost of the plates 41.
  • the air can only leave the evaporation humidifier after it has flowed through the drip catcher 60.
  • the flow is initially oriented in the axial direction by the cylindrical shape of the ring parts 61b.
  • the flow in the air channels is then deflected inward relatively abruptly by the conical ring parts 61a.
  • droplets carried in the air flow hit the inside of the conical ring parts 61a, insofar as they have a significant size.
  • the air freed of droplets is released from the fan wheel 8 via the chamber 59 and the outlet grille 5 to the environment.
  • the drops impinging on the ring parts 61a are initially driven under the influence of the centrifugal force and gravity against the flow direction of the air in the direction of the cylindrical ring parts 61b, the drops collecting on the transition to these ring parts. Under the influence of gravity and still effective centrifugal forces, the collected water reaches the ends of the rings facing the air-washing chamber, where it is thrown outwards and gets between the uppermost plates 41. From there this water flows together with the excess water in the humidifier part into the channel 20.
  • the drip catcher is able to prevent undesired precipitation of moisture in the form of drops.
  • the effectiveness of the drip is based on the fact that the flow when entering the drip, i.e. is axially aligned between the cylindrical parts 61b of the rings 61. These ring parts accordingly form axially parallel inlets of the air channels 66. Accordingly, the effectiveness of the ring parts 61a as deflection surfaces is increased.
  • the drip catcher 60 It is possible to design the drip catcher 60 with only one ring 61 or one air duct 66. On the other hand, more than three rings could be provided, depending on the cross section of the passage 52 or the radial distance between the hub 53 and the inner edge of the plates.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Dispersion Chemistry (AREA)
  • Air Humidification (AREA)
EP87110076A 1986-08-15 1987-07-13 Verdunstungsbefeuchter Expired - Lifetime EP0256306B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3280/86A CH672952A5 (en, 2012) 1986-08-15 1986-08-15
CH3280/86 1986-08-15

Publications (3)

Publication Number Publication Date
EP0256306A2 EP0256306A2 (de) 1988-02-24
EP0256306A3 EP0256306A3 (en) 1989-05-10
EP0256306B1 true EP0256306B1 (de) 1991-05-02

Family

ID=4252564

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87110076A Expired - Lifetime EP0256306B1 (de) 1986-08-15 1987-07-13 Verdunstungsbefeuchter

Country Status (3)

Country Link
EP (1) EP0256306B1 (en, 2012)
CH (1) CH672952A5 (en, 2012)
DE (1) DE3769722D1 (en, 2012)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3809950A1 (de) * 1988-03-24 1989-10-12 Bentz & Sohn Melitta Luftbefeuchter
CN1330907C (zh) * 2004-03-26 2007-08-08 松下电器产业株式会社 加湿装置
EP4365502A1 (de) * 2022-11-02 2024-05-08 IQAir AG Luftreinigungsvorrichtung mit optimierter luftführung

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3348821A (en) * 1965-11-23 1967-10-24 Whirlpool Co Humidifier
DE1778875A1 (de) * 1968-06-14 1971-08-05 Bosch Gmbh Robert Luftbehandlungsgeraet
FR2174780B1 (en, 2012) * 1972-03-10 1975-03-21 Air Ind
CH660517A5 (en) * 1983-07-14 1987-04-30 Defensor Ag Evaporating humidifier

Also Published As

Publication number Publication date
CH672952A5 (en, 2012) 1990-01-15
DE3769722D1 (de) 1991-06-06
EP0256306A3 (en) 1989-05-10
EP0256306A2 (de) 1988-02-24

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