EP3421806A1 - Ventilateur - Google Patents

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Publication number
EP3421806A1
EP3421806A1 EP18176208.9A EP18176208A EP3421806A1 EP 3421806 A1 EP3421806 A1 EP 3421806A1 EP 18176208 A EP18176208 A EP 18176208A EP 3421806 A1 EP3421806 A1 EP 3421806A1
Authority
EP
European Patent Office
Prior art keywords
spiral
blower
fan
air
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.)
Pending
Application number
EP18176208.9A
Other languages
German (de)
English (en)
Inventor
Christoph Häusig
Benedikt Hofmann
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.)
BSH Hausgeraete GmbH
Original Assignee
BSH Hausgeraete 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 BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH
Publication of EP3421806A1 publication Critical patent/EP3421806A1/fr
Pending legal-status Critical Current

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Classifications

    • 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
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • F04D29/4246—Fan casings comprising more than one outlet
    • 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
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • 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
    • 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

Definitions

  • the present invention relates to a blower, in particular a blower for a household appliance.
  • blowers can be used in many ways.
  • blowers can be used in household electrical appliances that are air-carrying appliances.
  • such blowers can be used in kitchen appliances, such as cooker hoods, ovens or refrigerators or, for example, in tumble dryers.
  • the extractor housing is designed to accommodate at least one fan housing and at least one motor enclosed by the fan housing together with an impeller, in particular a radial fan.
  • the extractor housing also has a suction opening for receiving the vapors from a cooking place, on.
  • the fan housing At the top of the fan housing, the fan housing on an air outlet or an air nozzle.
  • the fan housing is a spiral housing.
  • the arrangement of the spiral housing results in a discharge direction of the radial fan. In some applications, however, a multi-sided discharge direction is necessary.
  • the object of the present invention is therefore to provide a blower which has a multi-sided blow-off direction with nevertheless low performance loss, in particular pressure loss, volume flow loss, loss of efficiency and / or low noise development.
  • the fan should require the smallest possible space.
  • the object is achieved by a fan, with a spiral housing, in which a fan is at least partially accommodated with an impeller rotatably mounted on an axis.
  • the fan is characterized in that the spiral housing comprises at least two spiral-shaped air guide walls which at least partially form at least two exhaust openings on the spiral housing.
  • Top and bottom refer to the fan in the orientation in which the axis lies in the vertical.
  • the fan has according to the invention a spiral housing and a fan.
  • the fan has an impeller rotatably mounted on an axle.
  • the blower creates a negative pressure which is used to draw in air from the environment.
  • the air may be pure air.
  • the air is contaminated air, which may also be referred to as steam or vapor, and is cleaned by means of filter elements prior to entering the fan.
  • spiral housing As a spiral housing according to the invention an at least partially closed container for influencing the flow of air in the fan referred to.
  • the spiral housing forms at least part of a flow space.
  • the air can be sucked into the blower via a suction opening or a plurality of suction openings, which are provided in the spiral housing, and thus enter the interior of the blower.
  • the suction or suction openings are perpendicular to the axis of the fan and in the region of the axis, so that air is sucked into the interior of the fan wheel.
  • the spiral-shaped air guide walls form the radial outer walls of the spiral housing and define the flow space in the interior. In the region of the spiral-shaped air guide wall, the interior space, that is to say the flow space, is thus formed spirally or helically.
  • the spiral housing is also suitable for receiving the fan or at least a part of the fan, in particular the impeller of the fan.
  • the Fan of the fan is rotatably mounted on an axis, which is an axis of rotation, and is used to generate an air flow in the fan.
  • the fan is preferably driven by a motor.
  • the motor of the fan can also be accommodated in the spiral housing or be present separately therefrom.
  • the fan is disposed in the volute so that the axis of the fan passes through the center and the wall or walls of the volute are parallel to the axis of the fan.
  • the spiral housing has at least two blow-off openings, which are designed in such a way that they allow the air, which is conducted from the suction opening or the suction openings through the spiral housing to a blow-out opening, to be discharged outwards again.
  • the at least two exhaust openings preferably have in the radial or tangential direction of the fan to the outside. It is also possible for the purposes of the present invention that more than two blow-out openings are arranged on the blower. Downstream of the exhaust openings or these filter elements, such as odor filter can be arranged.
  • the blow-out openings are designed, for example, such that they release the air directly to the outside into the environment, wherein the air can pass through a filter element beforehand. Alternatively, however, the blow-out openings can also be configured such that they lead the air into a housing, from which the air is then released into the environment. Also in this alternative, the air can pass through a filter element before.
  • Each of the at least two exhaust openings is inventively formed at least partially by one of the spiral air guide walls of the blower.
  • one end of the spiral-shaped air guide wall forms at least the radially outer boundary of the exhaust opening.
  • a bend may be provided which extends outward in a radial or tangential direction from the end of the spiral air guide wall. This fold can also be referred to as a nose.
  • the end of the fold which faces away from the end of the spiral-shaped air guide wall, forms a lateral boundary of the blow-off opening.
  • the exhaust opening may be bounded by walls perpendicular to the axis, for example a cover plate or a separating plate.
  • the blower according to the invention has at least two blow-off, which are at least partially formed by spiral air guide walls, there are a number of advantages.
  • the fan according to the invention can be used in devices in which multi-sided discharge direction are necessary for some applications.
  • a further advantage of the blower according to the invention is that the efficiency of the blower or the volume flow in the blower is not reduced. This is the case with the embodiment according to the invention, since the air from the impeller is passed directly through the respective spiral Lucasleitwand to the respective exhaust port and thus a splitting of the air flow in the flow direction is not required, as this when providing a baffle to the outlet of conventional spiral housing can be effected.
  • the blower according to the invention in which the at least two spiral air guide walls are arranged rotated around the axis of the fan to each other.
  • the axis is according to the invention the axis of rotation of the fan.
  • air deflectors are referred to as being twisted, which are rotated relative to each other about the axis of rotation such that the blow-off openings formed by them lie in different angular positions about the axis.
  • the blow-out openings of the blower according to the invention can thus point in different directions, for example in opposite directions.
  • the spiral-shaped air guide walls can be variably rotated relative to each other.
  • the distance between the at least two blow-out openings can be different from each other and can be set variable depending on the application.
  • the dividing line of the mutually rotated Vietnameseleitrus is preferably in the impeller plane which is perpendicular to the axis of the impeller.
  • An advantage of the embodiment in which the spiral-shaped air guide walls are arranged rotated relative to one another is that, for example, no deflecting plate has to be arranged in the fan or after the exhaust opening in order to distribute the volume flow uniformly.
  • the use of such a deflection plate generates a pressure loss and represents an additional source of noise.
  • By rotating the spiral air guide walls to each other the geometry of the spiral housing of the blower according to the invention is changed such that the volume flow is evenly distributed, as in the use of a baffle.
  • the at least two blow-out openings are arranged spaced from each other.
  • the at least two blow-off openings are designated, which are formed separately from one another in the spiral housing. Accordingly, the two exhaust ports are not in communication with each other. From this embodiment, it is advantageous that the air, which is discharged through the blower according to the invention via the at least two blow-out to the outside, can be discharged in different directions.
  • the orientation of the respective exhaust openings can be variably adjusted according to the requirements of the blower according to the invention.
  • the spiral housing is divided in the axial direction of the fan into at least a first region and a second region, each region being delimited by a helical air guide wall.
  • a part of the spiral housing is defined, which has a blow-out and is bounded by a spiral air guide wall and thus forms a spiral segment of the interior of the spiral housing.
  • the limitation of the area by a spiral-shaped air deflector wall defines the size of the respective area.
  • a region is defined as that part of the volute in which the air, after entering the blower through the intake port, is directed and directed along the spiral airdam to the exhaust port.
  • the first region may also be referred to as the upper region and the second region as the lower region of the spiral housing.
  • the spiral housing can also be divided into more than two areas.
  • An advantage of this embodiment is that a targeted guidance or management of the air in the fan is possible.
  • the volute casing may for example be made of a plurality of parts, each part forming one of the regions.
  • the areas are arranged in the axial direction of the fan to each other and in particular adjacent.
  • the first area can be supplied with air over part of the circumference of the impeller and the second area can be supplied with air via a further axially adjacent part of the circumference of the impeller.
  • the distribution of the air flow is reliable to the two areas.
  • a separating plate is arranged between the first region and the second region, which is also referred to below as a separating wall.
  • a separating plate according to the invention a flat plate is referred to, which may consist of metal or plastic.
  • the separating plate is preferably perpendicular to the axis of the fan.
  • a passage opening for the impeller of the fan is provided in the separating plate. Due to the simple design of the separating plate, the production and assembly of the separating plate is simplified within the spiral housing and can be done with little effort.
  • the dividing wall is preferably fixedly positioned within the volute casing. For example, the partition may be connected to the spiral Heilleit paragraphn.
  • Another advantage of the embodiment in which a separating plate is provided is that the areas are defined in the interior of the spiral housing from each other and thus, a swirling of the guided in the respective area from the intake port to the respective exhaust port air can not take place, whereby the flow or the efficiency of the fan could be affected.
  • At least one helical air guide wall is increased in height starting from the smallest radius.
  • the height of the spoiler wall is the dimension thereof in the axial direction of the fan.
  • the spiral-shaped air guide wall forms a spiral or worm according to the invention.
  • the baffle may describe a portion of a logarithmic spiral, but the baffle begins only at a distance from the center of the logarithmic spiral. In a logarithmic spiral, the distance from its center changes by the same factor every revolution around that center. The radius thus grows proportionally to the spiral length.
  • the baffle which describes a portion of a logarithmic spiral, has a smaller radius near the center of the spiral than at the end of the baffle forming at least part of the breather opening.
  • a fold in the form of a nose can be provided.
  • the height of the helical air guide wall is, for example, largest in the region of the suction opening, which is the end of the helical air guide wall which is located farthest from the smallest radius.
  • the fan comprises an impeller driven on the axis, on the circumference of which blades are arranged.
  • a driven impeller according to the invention may also be referred to a rotor which is driven by a motor and whose axis is referred to as a rotor hub.
  • the blades may be fastened to the rotor hub and extend radially outward from the rotor hub, in particular curved outwards.
  • the fan thus preferably constitutes a radial fan.
  • the impeller is arranged within the spiral housing near the smallest radius, which is formed by the arrangement of the respective spiral-shaped air deflecting wall.
  • the spiral air guide wall is arranged to form part of a logarithmic spiral.
  • the spiral-shaped air deflecting wall ends in the immediate vicinity of the impeller.
  • the spiral housing has at least two cover disks, which each define a part of an exhaust opening.
  • the cover disks are the walls of the volute casing which close off the volute casing in the axial direction.
  • the cover plates can each lie in a plane perpendicular to the axis of the fan.
  • the cover plates are each connected in particular with at least part of the spiral-shaped air guide walls.
  • the exhaust opening is defined by the end of the spiral-shaped air deflector wall and the top wall as well as an optionally provided partition wall.
  • the cover plates are each a plate or disc, which is impermeable to air. At least in a cover plate, an opening, which is also referred to as suction, is formed.
  • the suction opening is in the context of the present invention, a recess in the cover plate, which is for example a hole.
  • An advantage of this embodiment is that no uncontrolled entry of the sucked air into the fan can take place, but the air is directed through the cover plate targeted to the intake.
  • the air flow within the volute casing is also directed to the respective exhaust opening also specifically from the intake opening in the cover disk, through which the air enters the fan and into the interior of the impeller of the fan and is discharged to the outside. As a result, the air can not escape from the volute uncontrolled.
  • an intake grille in at least one cover disk or in each case an intake grille for at least two cover disks for sucking air into the impeller.
  • the intake grille is the air-permeable cover, which covers an intake opening in a cover disk. Through the intake grille, the intervention in the interior of the fan can be prevented and thus serves the protection of the user.
  • a blower which has a suction opening preferably with suction grille in only one cover disk is also referred to as a one-sided blower.
  • An advantage of this embodiment is that the air selectively enters the impeller and the air flow is deflected by the blades of the impeller, whereby the air is selectively guided to a blow-out within the blower.
  • a blower which in each case has at least two cover disks each having a suction opening, preferably with a suction grille, is also referred to as a two-sided or double-flow blower.
  • the suction holes in the shrouds covered by the suction grids are arranged to face each other.
  • the blower is a centrifugal fan with forward curved blades, which is also referred to as a forward curved radial fan.
  • the air is sucked parallel or axially to the axis (rotor hub) of the impeller and deflected by the rotation of the impeller and blown radially. Such a deflection can be done for example by 90 °.
  • An advantage of this embodiment is that a targeted air flow from the suction port to the blowout occurs.
  • the blower according to the invention can be accommodated in an air-conveying device, in particular electrical device.
  • the present invention also relates to a device having at least one housing according to the invention.
  • the device may for example be a household appliance.
  • household appliances such as ovens, refrigerators or dryers
  • the generation of air flows in different directions is advantageous.
  • a refrigerator for example, the blowout of air used for cooling in different directions from a base of the refrigerator.
  • the device can also represent, for example, an extractor hood.
  • the extractor hood represents, for example, a circulating hood, exhaust hood or recess ventilation.
  • An advantage of using a blower according to the invention in an extractor hood is that the cleaned air can be blown out in several and different directions. In particular, this is advantageous in, for example, a ceiling fan, in which the air in the area of the ceiling is output in the horizontal direction. According to the present invention, in this case, the air can be output from the hood in the recirculation mode in several directions.
  • FIG. 1 is a perspective view of the interior of the volute casing 11 of a first embodiment of the blower 1 according to the invention shown.
  • the fan 1 according to the invention here is a radial fan.
  • the fan 1 comprises a spiral housing 11, in which a fan 12 or rotor, which has an impeller 120 driven on the axle, is accommodated.
  • the impeller 120 is rotatable about the axis, which is a rotation axis.
  • the spiral housing 11 has at least two spiral-shaped air guide walls 110.
  • the baffles 110 are the radially outer walls of the volute 11 and describe the shape of a spiral or worm.
  • the air guide walls 110 form part of a logarithmic spiral. In a logarithmic spiral, the distance from its center changes by the same factor every revolution around that center. The radius thus grows proportionally to the spiral length.
  • the end of the spiral air deflector 110 which is located closest to the center of the spiral, has a nose 1102.
  • the impeller 120 of the fan 12 is disposed near the lance 1102 of the respective spiral air guide wall 110 within the housing 11.
  • the spiral housing 11 has two exhaust ports 111 which are aligned in different directions, in particular in opposite directions.
  • the spiral housing 11 could also have more than two exhaust openings 111.
  • the orientation of the two exhaust openings 111 is carried out according to the invention in that the two spiral-shaped air guide walls 110 are arranged rotated about the axis to each other.
  • the spiral housing 11 is divided in the axial direction into two regions 1100, 1101, namely into a first region 1100, which also acts as an upper region and into a second region 1101, which also acts as a lower region can be designated.
  • the spiral housing 11 is constructed in several parts.
  • a region 1100, 1101 according to the invention the part of the spiral housing 11 is defined, which has a blow-out opening 111 and is bounded by a spiral-shaped air guide wall 110 and thus forms a spiral segment of the interior of the spiral housing 11.
  • a portion 1100, 1101 is defined as the portion of the volute 11 into which the air, after entering the fan 1 through the aspiration port (not shown), is directed along the helical dome 110 to the exhaust port 111.
  • the air is sucked through the suction port (not shown) into the fan 1, in particular the impeller 120 and by the blades (not shown), which are arranged on the circumference of the impeller 120, the air flow is deflected within the spiral casing 11, whereby the Air is directed to a blowout port 111.
  • first region 1100 and the second region 1101 can be separated from one another by a separating plate 1103.
  • the separating plate 1103 is in particular a flat plate which is impermeable to air.
  • the arrangement of a separating plate 1103 within the volute casing 11 ensures that the air streams of the first region 1101 and the second region 1102 are not mixed with each other, whereby the volumetric flow could be disturbed and the efficiency of the fan 1 as a whole could be reduced.
  • FIG. 2 shows a schematic perspective view of the embodiment of the FIG. 1 ,
  • the spiral housing 11 is formed on the one hand by the spiral-shaped air guide walls 110, which are the radial outer walls of the spiral housing 11, and on the other by cover disks 112.
  • the interior of the spiral housing 11 is not visible, but this covered by a cover plate 112.
  • the cover plates 112 form, for example, the axial boundaries of the spiral housing 11 and represent, for example, the top and bottom of the volute 11.
  • only one cover plate 112 is shown, which forms a cavity in the spiral housing 11 together with the spiral air guide wall 110 and in particular the Blow-out opening 111 of the spiral housing 11 defined.
  • both cover plates 112 may have a suction opening with suction grille 113, in which case the blower 1 would be referred to as a two-sided or double-suction blower 1.
  • FIG. 3 shows a schematic perspective view of a second embodiment of the blower according to the invention 1.
  • the embodiment in FIG. 3 of the housing 1 according to the invention basically corresponds to the embodiment of the FIG. 2 ,
  • the spiral shipsleitance 110 are increased from the smallest radius in height.
  • the smallest or smallest radius is in this case arranged near the center of the spiral of the spiral-shaped air guide wall 110.
  • the height of the spiral-shaped air guide wall 110 in the region of the blow-out opening 111 is greatest. Due to the increased height of the spiral-shaped air guide wall 110, the area of the blow-out opening 111 is also increased accordingly.
  • a baffle 1103 is shown, which is arranged between the areas (not shown).
  • FIG. 4 a perspective view of a third embodiment of the blower 1 according to the invention is shown.
  • the spiral housing 11 is divided in the axial direction into a first region 1100 and into a second region 1101.
  • the two spiral shipsleitance 110 are arranged rotated around the axis to each other, whereby the discharge openings 111 point in opposite directions.
  • the impeller 120 which is accommodated in the spiral housing 11, is arranged both within the first region 1100 and in the second region 1101, whereby the air flow of the sucked air, which enters the impeller via the suction opening in the cover disk (not shown), by means of of the blades (not shown) in the corresponding area 1100, 1101 is deflected.
  • the impeller 120 is disposed in the respective area 1100, 1001 so as to be located near the smallest radius formed by the arrangement of the respective spiral air guide wall 110.
  • FIG. 5 a further schematic perspective view of the third embodiment of the blower according to the invention is shown.
  • the interior of the spiral housing 11 is shown again schematically.
  • the impeller 120 is disposed near the lance 1002 of the respective spiral air guide wall 110.
  • the nose 1002 is disposed at the end of the spiral air guide wall 110 which defines the smallest radius of the spiral air guide wall 110.
  • the fan 1 according to the invention two exhaust openings 111 and the spiral housing 11 as a boundary next to the spiral Lucasleitancen 110 also covers 112 has.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP18176208.9A 2017-06-27 2018-06-06 Ventilateur Pending EP3421806A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102017210758.8A DE102017210758A1 (de) 2017-06-27 2017-06-27 Gebläse

Publications (1)

Publication Number Publication Date
EP3421806A1 true EP3421806A1 (fr) 2019-01-02

Family

ID=62620663

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18176208.9A Pending EP3421806A1 (fr) 2017-06-27 2018-06-06 Ventilateur

Country Status (3)

Country Link
EP (1) EP3421806A1 (fr)
CN (1) CN109139558A (fr)
DE (1) DE102017210758A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007019056A1 (de) * 2007-04-23 2008-10-30 BSH Bosch und Siemens Hausgeräte GmbH Lüfter für Dunstabzugshaube
DE102007021318A1 (de) 2007-05-07 2008-11-13 BSH Bosch und Siemens Hausgeräte GmbH Dunstabzugsgehäuse und Dunstabzugshaube
EP2138725A2 (fr) * 2008-06-26 2009-12-30 Momentum Industries, LLC Dispositif pour distribution de fluides volatiles dans l'air
US20170002829A1 (en) * 2013-12-16 2017-01-05 Korea Institute Of Industrial Technology Multi-volute sirocco fan

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4196771A (en) * 1977-09-12 1980-04-08 A/S Norlett Ventilator with heat exchanger
CN2514148Y (zh) * 2001-11-06 2002-10-02 林钧浩 外流风机
JP2010100108A (ja) * 2008-10-21 2010-05-06 Denso Corp 送風機およびそれを備える車両用空調装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007019056A1 (de) * 2007-04-23 2008-10-30 BSH Bosch und Siemens Hausgeräte GmbH Lüfter für Dunstabzugshaube
DE102007021318A1 (de) 2007-05-07 2008-11-13 BSH Bosch und Siemens Hausgeräte GmbH Dunstabzugsgehäuse und Dunstabzugshaube
EP2138725A2 (fr) * 2008-06-26 2009-12-30 Momentum Industries, LLC Dispositif pour distribution de fluides volatiles dans l'air
US20170002829A1 (en) * 2013-12-16 2017-01-05 Korea Institute Of Industrial Technology Multi-volute sirocco fan

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Publication number Publication date
DE102017210758A1 (de) 2018-12-27
CN109139558A (zh) 2019-01-04

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