EP2282135B1 - Ventilator - Google Patents

Ventilator Download PDF

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Publication number
EP2282135B1
EP2282135B1 EP10006318.9A EP10006318A EP2282135B1 EP 2282135 B1 EP2282135 B1 EP 2282135B1 EP 10006318 A EP10006318 A EP 10006318A EP 2282135 B1 EP2282135 B1 EP 2282135B1
Authority
EP
European Patent Office
Prior art keywords
air
web
cover
flow
flow guiding
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.)
Active
Application number
EP10006318.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2282135A2 (de
EP2282135A3 (de
Inventor
Lars Pietsch
Klaus Stricker
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.)
Maico Elektroapparate Fabrik GmbH
Original Assignee
Maico Elektroapparate Fabrik 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 Maico Elektroapparate Fabrik GmbH filed Critical Maico Elektroapparate Fabrik GmbH
Publication of EP2282135A2 publication Critical patent/EP2282135A2/de
Publication of EP2282135A3 publication Critical patent/EP2282135A3/de
Application granted granted Critical
Publication of EP2282135B1 publication Critical patent/EP2282135B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F24F7/00—Ventilation
    • F24F7/007—Ventilation with forced flow
    • F24F7/013—Ventilation with forced flow using wall or window fans, displacing air through the wall or window
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/002—Axial flow fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F04D25/12—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit being adapted for mounting in apertures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/541—Specially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/082—Grilles, registers or guards

Definitions

  • the invention relates to a fan with at least one impeller having an axis of rotation and at least one suction duct with an air intake opening upstream of the impeller or with at least one blowing duct with an air outlet opening downstream of the impeller, to which - to form a lateral air inflow or outflow - a cover by a distance is arranged.
  • Fans of the type mentioned are known from the prior art.
  • An exemplary fan according to the preamble of claim 1 is in the patent document DE-19925439-A described. They are often used in ventilation systems to supply or remove air from an environment.
  • exhaust air can be removed from the environment with the aid of the fan, or fresh air can be introduced into the environment.
  • the fan has an impeller which is driven, for example, by an electric motor. An air flow through the fan is generated by means of this impeller.
  • the fan is in an exhaust air version, it has the at least one suction duct with an air intake opening located upstream of the impeller, the cover being arranged at a distance from the air intake opening to form the lateral air flow.
  • the fan can also be available as a supply air version.
  • a blowing duct which essentially corresponds to the suction duct except for the direction of flow.
  • an air outlet opening which takes the place of the air intake opening.
  • the air flow mentioned is an air flow.
  • the cover is not only intended to form the lateral air flow, but also forms an optical cover for the fan or the air intake or air outlet opening.
  • the known fans have a strong pressure loss, which is dependent on an air volume flow that passes through the fan.
  • the efficiency refers to the ratio of the air output (i.e. the amount of air conveyed) to the energy supplied to the fan.
  • At least one air guide means is arranged in a zone between the rear of the cover and the impeller, which reduces or prevents an air flow around the axis of rotation.
  • An air vortex corresponding to the direction of rotation of the impeller is induced in the suction or blowing duct by the impeller rotating during operation of the fan.
  • the air guide means has a defined axial extent. It is therefore not just for supporting one other element - for example a filter - but rather suitable for guiding the air flow flowing through the fan.
  • the air flow around the axis of rotation is reduced or prevented, that is to say, in the region of the air guide means or downstream thereof, the occurrence of the air vortex induced by the impeller is at least partially prevented.
  • the air flow around the axis of rotation is reduced or prevented not only in the region of the air guide means, but also around an imaginary extension of the axis of rotation.
  • the exhaust air version or the supply air version of the fan it can be located upstream or downstream of the air guide.
  • the arrangement of the air guide in the zone between the back of the cover and the impeller makes it possible to significantly improve the air performance of the fan and, in particular, to reduce or eliminate strictly unstable areas in the characteristic curve (pressure increase ⁇ p over the volume flow).
  • the characteristic curve of a fan is usually described by three areas. A stable area (also called a work area), a strictly unstable area and a simply unstable area.
  • the strictly unstable range lies between the simply unstable (low volume flow) and the stable range (high volume flow).
  • the strictly unstable area of the characteristic curve is determined by a more or less pronounced (mathematical) saddle point. This should generally be reduced to a minimum.
  • the strictly unstable area initially increases. With help However, the air guide can be reduced or even completely eliminated.
  • the arrangement of the air guide means on the fan in particular when the fan is throttled, can practically double the static overpressure in the fan.
  • a filter can be arranged on the air guiding means or can be supported on it.
  • the air guiding means has an air guiding function and is not only used to arrange the filter in this area. Air vortices between the air guiding means and the cover should be reduced or prevented.
  • the cover is assigned to the fan, but does not have to be attached directly to it. It can be provided, for example, to install the fan in a wall and to fix the cover not to the fan itself or to a housing of the fan, but to the wall.
  • the cover is preferably a closed cover, so it is impermeable to air. The air flowing through the fan can therefore only pass the cover laterally from the cover.
  • the air guide means has at least one air guide web and a flow guide means arranged on the back of the cover.
  • the air duct is designed in such a way that it opposes the lowest possible flow resistance to the air flow present in the fan, but at the same time exerts a guiding effect on the air flow.
  • it has the smallest possible cross section perpendicular to a flow direction of the air flow, while it has a pronounced extension in the axial direction or air flow direction.
  • the air guide web can penetrate the entire air guide means or can be formed only in one area. In the latter case, a plurality of air guide webs are preferably provided, which for example run parallel to one another.
  • the flow guide means is provided on the back of the cover or is formed there.
  • the air guide means provides at least one holding web that supports the air guide web.
  • the holding web can be present downstream, upstream or - based on the flow - at the same axial position.
  • the holding web serves in particular to stiffen the air guiding means by supporting the air guiding web. This can prevent the air guide from being excited by the flow to vibrate, which would have a negative effect on the acoustic properties of the fan.
  • the holding web can be connected to the air guide web, in particular attached to it.
  • a one-piece design of the retaining bridge and air guide bridge is also possible.
  • the holding web can have the same or at least a similar axial extent as the air guide web.
  • the holding web can, for example, run at an angle to the air guide web. For example, a 90 ° angle is provided, so the holding web is perpendicular to the Air duct.
  • the holding bar can serve to guide the air flow.
  • a further development of the invention provides that the air guide bar and / or holding bar are held in a frame.
  • the frame can, for example, be exchangeably fastened in the zone.
  • a latching device can be provided in order to be able to remove the air guide means or the frame of the air guide means from the fan in a simple manner or to replace the air guide means.
  • a positive connection with a housing of the fan is provided on at least one side of the frame, while the latching element is arranged on the opposite side. In this way, the frame can be folded out of the housing of the fan and then removed after the latching means has been opened.
  • a further development of the invention provides that the air guide web and / or the holding web runs straight, obliquely, arched, star-shaped or meandering at least in some areas.
  • the course of the air guide web or the holding web can be chosen arbitrarily.
  • the air guide web or holding web can be designed continuously in the above-mentioned ways.
  • provision can also be made for the air guide web or holding web to run straight in some areas and, for example, to be curved in at least one further area.
  • Arc-shaped means that there is a curvature or a curve.
  • a straight course can mean that the air guide web or holding web runs parallel to at least areas of the frame, should one be provided.
  • the oblique or star-shaped Realizable In the course of the course, the course of a cross section of the air guide web or the holding web is considered.
  • the profiles described can also exist if the respective web is inclined in the axial direction or is profiled.
  • a further development of the invention provides that the air guide web and / or the holding web are profiled. This means that they have a flow guide profile, at least in some areas - as seen in cross section.
  • the flow characteristic of the air flow can be influenced in a more targeted manner by means of the flow guide profile than would be possible with an unprofiled version.
  • a flow guide profile can be understood to mean, for example, an airfoil profile, that is to say specially shaped flow profiles which specifically influence the air flow.
  • a further development of the invention provides that the air guide web and / or the holding web open into a support element.
  • the support element can be provided.
  • the support element is provided, for example, centrally on the air guide means, so that the air guide web or the holding web open into it at least on one side.
  • the support element can be of any shape. For example, it can have a rectangular cross section.
  • the flow guide means has at least one flow guide web and / or a flow guide structure formed at least in regions on the back of the cover.
  • the flow guide here denotes an element which has at least one free surface, which points in particular away from the back of the cover.
  • the flow guide web has the greatest extent in its longitudinal direction, while the height of the flow guide web is less than or equal to the distance between the rear of the cover and a housing of the fan.
  • the flow guide webs advantageously have a smaller height than this distance.
  • the flow guide webs form flow guide channels on the back of the cover. The air flow passing through the fan is guided in these flow channels. In this way, a targeted alignment of the air flow can be achieved.
  • such an arrangement achieves a reduction in induced air vortices and thus a reduction in the air flow around the axis of rotation.
  • the back of the cover can have elements which effect an additional guidance of the flow.
  • the flow guide structure is provided for targeted guidance of the flow or for the formation of an advantageous turbulence structure of the flow. The latter means in particular that a flow resistance which is applied to the air flow from the rear is reduced.
  • the flow guide web is a flow guide rib or a row of pins.
  • the flow guide rib is essentially characterized in that, unlike the row of pins, it is not composed of many individual elements, i.e. pins. Rather, an essentially continuous course of the flow guide rib is provided. However, this does not mean that the flow guide rib must run continuously.
  • the row of pens on the other hand, is composed of many individual, essentially peg-shaped elements that are directly next to each other or are placed at a distance from one another and thus form the flow guide web in its entirety.
  • a combination of flow guide rib and row of pins is also possible. In this case, a flow guide rib is provided and overlaid by the row of pins, so that, for example, the wall thickness of the flow guide rib thicken at intervals in the flow guide rib.
  • the flow guide web has a constant or a, in particular continuously, increasing height. Depending on the direction or definition of the variable height, there can of course also be a decreasing height. If the flow guide web is arranged, for example, in the radial direction, the height of the flow guide web can be provided to increase radially inwards. Continuous growth is advantageous. Of course, a sudden increase in altitude or an increase based on a curve shape is also possible.
  • the flow guide web has a straight or a curved course.
  • Such a course only has to exist in certain areas.
  • the flow guide bar does not have to run straight or curved throughout.
  • the curved course can be provided, for example, in order to impart a swirl to the air flow which is opposite to the swirl of the air flow around the axis of rotation which is induced by the impeller.
  • a complete compensation of the swirl can then be achieved, at least for predetermined mass flows, and thus the air flow around the axis of rotation can be prevented will.
  • this goal can also be achieved by means of the straight course of the flow guide bar, the geometry of the flow guide bar also having to be adapted to the air flow induced by the impeller around the axis of rotation in this case too.
  • the flow guide rib runs continuously or is interrupted in some areas.
  • the flow guide rib runs continuously.
  • it is divided into areas which can each have the same or a different length.
  • it can also be advantageous to choose the length of the areas depending on a position of the area.
  • areas with a shorter length can be provided in an inner area and with a longer length in an outer area. The increase in length can take place continuously. The distance between the areas can accordingly remain constant or also have a growing or falling length.
  • the flow guide web has at least one air passage.
  • Air passage is generally to be understood as a recess. This can be a hole, but also only a bulge or notch of the flow guide.
  • a surface can be provided with a structure by means of the air passage. This means that the height of the flow guide bar is varied locally by means of the air passages.
  • a further development of the invention provides that the flow guide web is profiled at least in some areas. It therefore has a flow guide profile at least in some areas.
  • the term “flow guide profile” or “profiled” has already been defined above on the basis of the air guide web or the holding web.
  • the flow guide structure has dimples, riblets and / or winglets.
  • a golf ball-like structure is created using the dimples.
  • the riblets form a groove and / or scale structure.
  • the winglets are primarily used to induce further vortex structures that either reduce flow resistance or counteract the air flow induced by the impeller around the axis of rotation.
  • the dimples and the riblets can be used to reduce the frictional resistance on the back of the cover.
  • the riblets can for example be designed such that a free end pointing away from the rear tapers.
  • a further development of the invention provides a plurality of flow guide webs which are staggered with respect to one another at least at one of their ends. This means that the end of a flow guide web is advanced or falls back compared to the end of another flow guide web.
  • a staggering in the radial direction can be provided in the case of a radial arrangement of the flow guide webs. In this way, it is prevented that the flow-through cross section is blocked by the flow guide webs, which is particularly the case when all the radial flow guide webs extend into a center of the rear of the cover to run. Nevertheless, such an arrangement can be advantageous and can be implemented in an embodiment of the fan.
  • a further development of the invention provides that at least one free space, in particular a circular top view, is provided on the back of the cover, in which no flow guide web and / or no flow guide structure is provided.
  • the free space is provided. In principle, this can have any geometry, for example it is circular.
  • the flow guide webs can at least partially end outside the free space; additionally or alternatively, no flow guide structure is also provided in the free space.
  • the free space can be arranged, for example, centrally on the back of the cover.
  • the cover - in plan view - is rectangular, in particular square, round or oval.
  • the cover can have any shape.
  • the shape of the cover is preferably matched to a shape of the housing of the fan.
  • the cover — in plan view — can completely cover further areas of the fan, that is to say at least have the same size or be larger. Alternatively, however, a smaller cover can also be implemented.
  • a further development of the invention provides that the air guiding means is fastened, in particular interchangeably, to a housing of the fan.
  • the frame of the air guide means is provided for this purpose, on which the air guide web and / or holding web are arranged. It is particularly advantageous if the air guiding means is exchangeable.
  • the air guiding means can also be fastened to the housing of the fan without a frame.
  • the air guide web and / or the holding web are formed in one piece with the housing.
  • a spacer can also be provided between the housing and the air guiding means, in particular in order to arrange the latter at a distance from the impeller and the rear of the cover.
  • a further development of the invention provides that the air guiding means and / or the cover are made in one piece.
  • the air guiding means or the cover can be produced particularly simply and inexpensively if they are made from one piece, that is to say that no assembly process is necessary after manufacture.
  • the one-piece design of air guiding means or the cover is therefore advantageously present immediately after their manufacture.
  • the air guiding means and / or the cover consist at least in regions of plastic and / or metal.
  • the air guiding means can consist of sheet metal, in particular the air guiding webs or holding webs can be formed from sheet metal strips.
  • other suitable materials can also be used to produce the air guide and / or the cover.
  • the air guiding means and / or the cover are present as a molded part or as a shaped part. This means that they are manufactured by injection molding or by forming.
  • the injection molding process can or be a multi-component process. Forming is carried out, for example, with a deep-drawing process.
  • the air guiding means and / or the cover can also be composed of individual parts.
  • the impeller is part of an axial, radial or diagonal air conveying device.
  • the air delivery device is a turbomachine which, in the sense of the fan, serves to generate the air flow through the fan. Due to its rotational movement, the impeller causes the air flow around the axis of rotation, which is to be reduced or prevented by the measures explained above.
  • the diagonal air delivery device corresponds to a semi-radial air delivery device.
  • a further development of the invention provides that a stator is provided downstream or upstream of the impeller.
  • the stator is provided, which is arranged in particular directly adjacent to the impeller.
  • the air flow flows through the stator to the impeller, while in the downstream arrangement the air is first conveyed through the impeller and then flows through the stator.
  • a further development of the invention provides that use is provided in an outside area or an inside area.
  • the fan described above is suitable for both indoor and outdoor use. Only the materials from which the fan or its components are made need to be matched to the place of use.
  • the Figure 1 shows a fan 1 with a housing 2, to which a cover 3 can be attached.
  • the cover 3 is essentially rectangular, in particular square, and is adapted to the shape of the housing 2. It is provided that the cover 3 projects beyond the housing 2 to the side. Alternatively, it can also be provided that the cover - in plan view - is as large or even smaller than the housing.
  • the cover 3 is detachably attached to the housing 2. This can be provided, for example, by means of a plug-in device, so that the cover 3 can be easily attached to and removed from the housing 2, but no unintentional removal or falling off of the cover 3 from the housing 2 is possible.
  • the housing 2 consists of a housing body 4 and a housing cover 5, the housing cover 5 being held detachably on the housing body 4 by means of latching means.
  • an air intake opening 6 in the housing cover 5 In the present exhaust air version of the fan 1 there is an air intake opening 6 in the housing cover 5. Through this air is sucked into the interior of the fan 1.
  • an air guiding means 7 In the area of the air intake opening 6, an air guiding means 7 can be seen, which consists of a frame 8, a holding web 9 and several air guiding webs 10.
  • a surface 11 of the housing cover 5 is - in cross section - convex, the shape of the cover 3 forming a corresponding counterpart, ie - in cross section - is also convex. This results in a spherically shaped recess in the housing cover 5 or the cover 3.
  • the Figure 2 shows a front view of the fan 1, the cover 3 being recognizable at first.
  • a sectional view is also shown, in which a cross section (marked on the cover 3) of the fan 1 is shown.
  • This cross-sectional illustration shows that an impeller 12 and a stator 13 are arranged in the fan 1 or in the housing 2, which are part of an air conveying device 14. This serves to suck in air from an environment 15 of the fan 1 and to convey it in the direction of an outlet 16.
  • the air delivery device 14 is arranged in a suction channel 17 connected to the outlet 16 in terms of flow.
  • the air intake opening 6 - the exhaust air version of the fan 1 - is provided downstream of the impeller 12.
  • the cover 3 is in turn spaced apart from the air intake opening 6 or the housing 2 and thus from the housing cover 5.
  • the air guiding means 7 is arranged in a zone 18, which is between a rear side 19 of the cover 3 and the impeller 12 of the air conveying device 14.
  • the retaining web 9, which runs from top to bottom, or the air guide webs 10 and the frame 8 arranged perpendicularly thereto, can be seen in this context.
  • the air guide means 7 has a certain extent in the axial direction (with respect to an axis of rotation 20). It is therefore suitable for guiding an air flow which is passed through the air delivery device 14 is generated. Due to the axial extension of the air guide 7, this serves to reduce or completely prevent an air flow around the axis of rotation 20.
  • a further air guide 7 'in the form of a flow guide 21 is provided on the back 19 of the cover 3.
  • the rear side 19 is at least partially provided with a flow guide structure (not shown).
  • the Figure 3 shows a cross-sectional view of the housing 2 of the fan 1.
  • the cover 3 is shown in an exploded view, the rear side 19 being recognizable.
  • the Figure 3 also shows that the impeller 12 is driven by an electric motor 22.
  • an edge 23 of the air intake opening 6 formed in the housing cover 5 is curved in cross section in the direction of the air conveying device 14. In this way it is avoided that there are sharp-edged areas in the flow path, which could have a disadvantageous effect on the acoustics of the fan 1.
  • the flow guide means 21 formed on the rear side 19 of the cover 3 has a plurality of flow guide webs 24, each of which is present as a flow guide rib 25.
  • a free space 26 with a circular cross section is provided centrally on the rear side 19. None of the flow guide ribs 25 is present in the area of the free space 26, and they therefore end outside the free space 26. In this case, their ends 27 are staggered with respect to one another.
  • the angle specified here is to be understood purely as an example. Of course, other angles, not mentioned here, of the flow guide ribs 25 are also possible. It may also be useful for some applications not to provide a free space 26, but to guide the flow guide ribs 25 to the center of the cover 3.
  • the cover 3 is formed in one piece.
  • the flow guide ribs 25 are therefore already present immediately after the cover 3 has been produced.
  • the cover 3 is manufactured as a molded part.
  • the flow guide ribs 25 guide the air flow.
  • the flow guide ribs 25 are designed such that they have a comparatively large height in the region of the free space 26, which drops radially outwards. This drop occurs continuously, so that a linear change in the height of the flow guide ribs 25 or the flow guide webs 24 is provided.
  • the flow guide ribs 25 run in a straight line from the free space 26 radially outwards.
  • the Figure 4 shows an isometric view of the fan 1, wherein the cover 3 and the housing cover 5 have been removed.
  • the housing body 4 is thus shown, to which the air guide means 7 is removably attached with its frame 8.
  • catch elements 30 are provided on one side of rear grip elements 29 and on the opposite side of the frame.
  • the Figure 5 shows a first embodiment of the air guide 7 in a plan view.
  • the air guide means 7 has the peripheral frame 8, in which both the holding web 9 and a plurality of air guide webs 10 are fastened.
  • the air guide webs 10 are perpendicular to the holding web 9 and run essentially parallel to one another. Both the holding web 9 and the air guide webs 10 are just arranged in the frame 8.
  • the air guide 7 is formed in one piece and is made, for example, as a molded part made of plastic.
  • the holding web 9 is provided on the air-guiding means 7 in order to support the air-guiding webs 10 over their longitudinal extent and thus in particular to prevent them from being excited to vibrations which could have a negative effect on the acoustic behavior of the fan 1.
  • the Figure 6 shows a second embodiment of the air guide 7.
  • the frame 8 and the retaining web 9 are also provided here, but there is only one air guide web 10 which extends in a meandering manner over a flow area 31 of the air guide 7. Loops of the meandering air guide web 10 can be at a constant distance or - as in the present exemplary embodiment - at a changing distance.
  • the Figure 7 shows a third embodiment of the air guide means 7.
  • Two retaining webs 9 and a plurality of air guide webs 10 are arranged in the frame 8.
  • a support element 32 is provided centrally in the air guide means 7. This has an essentially rectangular Cross section on.
  • the holding webs 9 open into the support element 32 with one of their ends, while the other is held on the frame 8.
  • the holding webs 9 are in the air-guiding means 7 in a star shape, while the air-guiding webs 10, viewed in cross section, enclose rectangles with different surfaces.
  • the Figure 8 shows the back 19 of the cover 3 in plan view. Recognizable here is again the free space 26, which is arranged centrally on the rear side 19 and has a circular cross section, and the flow guide ribs 25, which, starting from the free space 26, extend radially outward in a radial direction to an edge 33 of the cover 3. As already stated above, a surface 34 of the rear side 19 is provided with a flow guide structure (not shown).
  • the Figure 9 shows several embodiments for the flow guide web 24 in plan view.
  • a curved course with a constant width is shown at the top, the flow guide web 24 being designed as a flow guide rib 25.
  • a flow guide web 24 or a flow guide rib 25 which runs straight, but has lateral recesses 35 with a substantially semicircular cross section, with which the cross section of the flow guide rib 25 varies over its length.
  • the next embodiment of the flow guide web 24 is composed of a thin flow guide rib 25 and a row of pins 36 overlying it.
  • the row of pins 36 consists of pins 37 arranged at regular intervals, the diameter of which is larger than the width of the flow guide rib 25.
  • the fourth embodiment of the flow guide web 24 is a straight one Flow guide rib 25. This is followed by an embodiment of the flow guide web 24, a flow guide rib 25 not running continuously but being interrupted in some areas.
  • the flow guide rib 25 is subdivided into regions 38 ', 38 ", 38'” and so on, the region 38 'having a short length and the subsequent elements (including the regions 38 "and 38'") each having a greater length than the previous range.
  • the distances between the areas 38 ', 38 ", 38'” and so on remain constant over the entire length of the flow guide rib 25.
  • the next embodiment of the flow guide web 24 is a row of pins 36 which, as already stated, consists of a plurality of pins 37.
  • the row of pins 36 shown here consists of pins 37, each with a constant cross-section or diameter, which are each at the same distance from adjacent pins 37.
  • the last embodiment of the flow guide web 24 forms a flow guide rib 25 which has a constant cross section and a curved course. Curved does not mean that the curvature only points in one direction; rather, all of the curves that are curved or curved at least in sections are summarized here under this term.
  • the Figure 10 shows several examples of flow guide webs 24 in a side view. It is clarified here that the flow guide webs 24 designed as flow guide ribs 25 can have both a constant (third, fourth and sixth embodiment) and an increasing or decreasing height (first, second and fifth embodiment).
  • the flow guide ribs 25 of the first four embodiments have air passages 39 which essentially reduce the height of the air locally Flow guide rib 25 mean. Air can flow through the air passages 39, which significantly improves the acoustic behavior of the fan 1.
  • the Figure 11 shows a diagram for the pressure increase ⁇ p over the volume flow.
  • the diagram shows characteristic curves 40 and 41 for a conventional (characteristic curve 40) and a fan 1 provided according to the above explanations (characteristic curve 41).
  • the characteristic curve 40 can be roughly divided into three areas, namely a simply unstable area 42, which is available for volume flows from 0 m 3 / h to about 15 m 3 / h, a strictly unstable area 43 (about 15 m 3 / h to about 40 m 3 / h) and a stable area 44 (greater than about 40 m 3 / h).
  • a saddle point 45 is present in the strictly unstable area 43.
  • the characteristic curves 40 and 41 run almost congruently in the stable region 44.
  • the pressure increase with the same volume flow for the characteristic curve 40 is significantly lower than for the characteristic curve 41.
  • the strictly unstable area 43 which is clearly pronounced for the characteristic curve 40, is marked with a Fan 1, as described above, largely avoided.
  • a significantly greater pressure increase can be achieved with the fan 1.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP10006318.9A 2009-07-03 2010-06-18 Ventilator Active EP2282135B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009032207.8A DE102009032207B4 (de) 2009-07-03 2009-07-03 Ventilator

Publications (3)

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EP2282135A2 EP2282135A2 (de) 2011-02-09
EP2282135A3 EP2282135A3 (de) 2018-03-28
EP2282135B1 true EP2282135B1 (de) 2020-04-01

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EP10006318.9A Active EP2282135B1 (de) 2009-07-03 2010-06-18 Ventilator

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ES (1) ES2799401T3 (es)

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DE102011013015A1 (de) * 2011-03-03 2012-09-06 Jens Bader Druckbelüfter zur Brandbekämpfung
GB2490138B (en) * 2011-04-19 2015-08-05 Rytons Building Products Ltd Ventilation extractor grille
DE202013104384U1 (de) * 2013-09-26 2015-01-08 Bärbel Burkhardt-Ganter Vorrichtung zur Erzeugung von Luftströmungen, insbesondere Windmaschine für fotographische oder filmische Zwecke
DE102015115415A1 (de) * 2015-09-14 2017-03-16 Shuangliang Clyde Bergemann GmbH Luftkühler mit Luftleitblechen
DE102018203629B3 (de) 2018-03-09 2019-06-27 Maico Elektroapparate-Fabrik Gmbh Ventilatoreinsatz zur Anordnung in einem Montagegehäuse, Ventilatoranordnung sowie Verfahren zum Montieren einer Ventilatoranordnung
CN108679712A (zh) * 2018-05-18 2018-10-19 青岛海尔空调器有限总公司 一种空调室内机及其控制方法
DE102021204015A1 (de) * 2021-04-22 2022-10-27 Maico Elektroapparate-Fabrik Gesellschaft mit beschränkter Haftung Stellventil, insbesondere für eine Lüftungseinrichtung, Verfahren zum Betreiben eines Stellventils sowie Lüftungseinrichtung mit einem Stellventil
DE102021213286A1 (de) * 2021-11-25 2023-05-25 Maico Elektroapparate-Fabrik Gesellschaft mit beschränkter Haftung Stellventil, insbesondere für eine Lüftungseinrichtung, Verfahren zum Betreiben eines Stellventils sowie Lüftungseinrichtung mit einem Stellventil
DE102022117314A1 (de) 2022-07-12 2024-01-18 Andreas Seibold Vorrichtung zum austausch von wärmeenergie mit der umgebungsluft

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GB583557A (en) * 1944-10-26 1946-12-20 Joseph Cuthbert Akester Improvements in or relating to ventilating fan units
DE19925439B4 (de) * 1999-06-02 2008-12-11 Stego-Holding Gmbh Lüfter
JP4108902B2 (ja) * 2000-05-09 2008-06-25 東芝キヤリア株式会社 換気機器
GB0328384D0 (en) * 2003-12-06 2004-01-14 Johnson Electric Sa Blower motor
DE202006009355U1 (de) * 2006-06-13 2006-09-07 Pfannenberg Gmbh Filterlüfter mit einer Schnellbefestigungseinrichtung
JP2007332818A (ja) * 2006-06-13 2007-12-27 Toshiaki Nakayama 吸気側にガイド板を持つ換気装置
EP1895166B1 (de) * 2006-08-30 2009-02-11 Ralf Meier Strömungsgleichrichter für einen Ventilator
DE102009004366A1 (de) * 2009-01-08 2010-07-15 Riegelhof & Gärtner oHG Lüfter
US8070420B2 (en) * 2009-05-28 2011-12-06 Chen Yung-Hua Airflow-cooling apparatus for a ceiling air-conditioning circulation machine

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Also Published As

Publication number Publication date
DE102009032207B4 (de) 2016-11-17
DE102009032207A1 (de) 2011-01-05
ES2799401T3 (es) 2020-12-17
EP2282135A2 (de) 2011-02-09
EP2282135A3 (de) 2018-03-28

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