EP0395748A1 - Einbaulüfter, insbesondere für schallschluckhauben. - Google Patents
Einbaulüfter, insbesondere für schallschluckhauben.Info
- Publication number
- EP0395748A1 EP0395748A1 EP89907147A EP89907147A EP0395748A1 EP 0395748 A1 EP0395748 A1 EP 0395748A1 EP 89907147 A EP89907147 A EP 89907147A EP 89907147 A EP89907147 A EP 89907147A EP 0395748 A1 EP0395748 A1 EP 0395748A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fan
- built
- plate
- housing part
- metal plate
- 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
Links
- 239000002184 metal Substances 0.000 claims abstract description 23
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000010616 electrical installation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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
Definitions
- the invention relates to a built-in fan, in particular for sound absorbing hoods, with an outer plate with a blow-off opening and an inner plate connected to a housing part having a suction opening for receiving a fan motor and a fan wheel driven by it, the inner plate and outer plate being connected to one another by fastening screws are connected.
- Such built-in fans are known in numerous embodiments. They are installed in the outer walls of sound-absorbing hoods or the like and have the function of blowing fresh air into the interior of the devices concerned or of removing warm air from the interior.
- the wiring of the built-in fan is also problematic in acoustic hoods. Relatively long cables must be laid from the built-in fan to the switch with which the sound-absorbing hood and the devices located therein, in particular a Printer that is turned on. The printer is usually connected to the switch on the soundproof cover so that the soundproof cover does not have to be opened to switch the printer on.
- the invention is based on the object of designing a built-in fan of the type mentioned at the outset in such a way that it ensures smooth running and offers the possibility of improved handling, in particular in the case of acoustic hoods.
- the fan motor responsible for the noise with the fan wheel is fastened to an inserted metal plate which is fastened to the wall of the device in question, for example the sound absorbing hood, using the fastening screws.
- This makes it possible to mount the motor in a very stable manner, which does not tend to vibrate and therefore enables particularly smooth running.
- the metal plate improves the overall stability of the fan installation.
- the metal plate is preferably provided with through-openings for a housing of a switch and / or plug to be operated on the outer plate. This makes it possible to completely interconnect the entire sound absorption hood on the built-in fan itself.
- the on-off switch for the sound-absorbing hood is therefore preferably located on the arrangement of the built-in fan in the area of the metal plate.
- connection cable is used, for example, to supply power to a printer housed in the sound-absorbing hood.
- the connection cable is thus a printer connection cable.
- At least one plug connection can also be provided on the housing part pointing toward the inside, so that other or further devices on the inside of the built-in fan can also be supplied with current or electrical signals or data from the built-in fan.
- the power supply to the motor which is expediently surrounded by ring-shaped suction or blow-off openings, takes place preferably via a U-shaped web of the outer plate, which together with the metal plate forms a channel for connecting wires of the fan motor.
- the connecting wires can be guided into the interior of the housing part and wired through a through opening provided in the metal plate.
- the smoothness achieved by the metal plate is further improved in that the opening of the housing part adjacent to the fan blades has annular slots with webs extending approximately tangentially from a circular central part and that the webs are approximately perpendicular to the fan blades of the fan wheel.
- the unavoidable radially extending connecting webs bridging the ring-shaped slots regularly give rise to fan noises in connection with the fan blades. Surprisingly, these noises can be considerably reduced if the webs are oriented relative to the fan blades in the manner described.
- the annular slots are preferably delimited on both the suction side and on the discharge side by webs which have obliquely directed guide surfaces, so that the annular air flows from the central part are directed obliquely radially outwards. This means that on both sides of the built-in fan that the air streams flow from as large a volume as possible or into as large a volume as possible, so that drafts are avoided.
- Figure 1 - a view of the back of an outer plate and an inserted metal plate for a built-in fan
- Figure 2 - a view of an outer plate according to a first embodiment
- FIG. 3 - a view of the inner plate with the housing part of the fan according to Figure 2
- Figure 4 - a view of the outer plate according to a second embodiment
- FIG. 5 shows a view of the inner plate with the housing part of the fan according to FIG. 4
- Figure 6 - a view of an outer plate of a third
- FIG. 7 shows a view of the inner plate with the housing part of the fan according to FIG. 6
- Figure 8 - a view of an outer plate according to a fourth embodiment
- Figure 9 - a view of the inner plate and housing part of the
- FIG. 10 - a representation which clarifies the relative arrangement of webs of the intake grille and fan blades.
- FIG. 1 shows an edge 2 directed towards the rear of an outer plate 1, which comprises a metal plate 3 inserted into the outer plate 1 on all sides.
- the metal plate 3 has four through holes 4 for fastening screws at its four corners.
- An annular opening 5 of the metal plate 3 is divided into uniform sections by five radial webs 6, 7.
- a central opening 8 and two lateral openings 9 serve to fasten a fan motor within the ring-shaped fan opening 5.
- the outer circumference of a fan wheel is indicated by a dash-dotted line 10.
- a radial web 7 has a greater width and runs horizontally. On the inside and on the outside of the ring-shaped fan opening 5, the wide radial web 7 is aligned with two through openings 11, which are used to feed connecting wires of the fan motor.
- the connecting wires are passed through the inner through-opening 11 from the viewer side through the plane of the drawing, run on the back against the wide radial web 7 and return to the viewer side through the outer through-opening 11.
- the outer plate 1 has a corresponding web 12 which is U-shaped and hollow toward the metal plate 3.
- the U-shaped web 12 forms, together with the wide radial web 7 of the metal plate 3, a closed channel for the passage of the connecting wires, so that they are protected against entanglement with the fan blades.
- the metal plate 3 also has two rectangular through openings 13, which are explained using the exemplary embodiments shown.
- FIG. 2 shows an exemplary embodiment in which the outer plate 1 has an annular blow-off opening 14, which is only shown schematically, and in the region of the lower through opening 13 of the metal plate 3 has a control light 15.
- FIG. 3 shows an inner plate 16 belonging to this exemplary embodiment, which is connected in one piece to an inwardly projecting housing part 17 which has an annular suction opening 18.
- the intake opening 18 consists of a plurality of annular ribs 19, which are directed radially outwards from a closed central part 20, so that the air intake converges towards the fan wheel.
- the necessarily existing connecting webs 21 extend approximately tangentially from the closed central part 20 to the outside.
- An electrical connection cable 22 is led out of the housing part 17, which in the case of use in a sound-absorbing hood is a printer connection cable.
- a plug 23 next to the suction opening 18 allows the power supply to the fan on the inside.
- FIGS. 4 and 5 there is a plug 24 for a mains cable on the outer plate 1 and, above it, an illuminated switch 25 for switching the power supply for a sound absorbing hood on and off.
- the housing part 17 on the back has no plug or the like. Only the connecting cable 22 is led out of it.
- an illuminated switch 25 is located on the outer plate 1, while the housing part 17 has a power connector 23, a socket 26 for additional devices and a fuse 27 on the inside.
- the outer plate 1 is in turn provided with an illuminated switch 25, while only the plug 23 for a mains cable is located on the rear.
- part of the ribs 19 and two connecting webs 21 have been broken away in order to clarify the position of the fan blades 28 behind them relative to the connecting ribs 21.
- the front edges 29 of the fan blades 28 are approximately perpendicular to the connecting ribs 21. It has been shown that this relative arrangement of the front edge 29 of the fan blades 28 to the connecting webs 21 produces the lowest possible fan noise.
- the housing part 17 is rectangular to save space on one side, rounded on the other side - namely adapted to the radius of the fan wheel - so that a collision with the fastening screws 4 on this side is avoided.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE8808007U DE8808007U1 (de) | 1988-06-22 | 1988-06-22 | Einbaulüfter, insbesondere für Schallschluckhauben |
| DE8808007U | 1988-06-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0395748A1 true EP0395748A1 (de) | 1990-11-07 |
| EP0395748B1 EP0395748B1 (de) | 1993-12-01 |
Family
ID=6825236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP89907147A Expired - Lifetime EP0395748B1 (de) | 1988-06-22 | 1989-06-21 | Einbaulüfter, insbesondere für schallschluckhauben |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0395748B1 (de) |
| DE (2) | DE8808007U1 (de) |
| WO (1) | WO1989012754A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10162919A1 (de) * | 2001-12-20 | 2003-07-03 | Bsh Bosch Siemens Hausgeraete | Lüftervorrichtung |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE7120264U (de) * | 1971-09-09 | Kirchmeier Kg | Ventilator zur Lüftung von Räumen, ms besondere von Feuchtraumen | |
| US2021086A (en) * | 1934-03-20 | 1935-11-12 | Howard E Oskamp | Air diffuser |
| DE729484C (de) * | 1938-03-05 | 1942-12-17 | Siemens Ag | Befestigung des Antriebsmotors eines Luefters im Lueftergehaeuse |
| US2325754A (en) * | 1941-01-31 | 1943-08-03 | Edward A Ebert | Portable electric fan |
| GB638107A (en) * | 1946-11-27 | 1950-05-31 | Electrolux Ab | Improvements in or relating to electrically driven fan units |
| CH470587A (de) * | 1966-01-06 | 1969-03-31 | Baumann Ludwig | Raumventilator mit gleichzeitiger Förderung von Aussenluft in den Innenraum und von Innenraumluft nach aussen, insbesondere mit Zwischenverschluss |
| DE1947636U (de) * | 1966-06-21 | 1966-10-13 | Siemens Schukkertwerke Ag | Wand- und fensterluefter. |
| FR2503280B1 (fr) * | 1981-04-03 | 1986-04-11 | Etri Sa | Ventilateur de type plat, notamment pour circuits electroniques |
| DE8803717U1 (de) * | 1988-03-18 | 1988-05-26 | Siemens AG, 1000 Berlin und 8000 München | Lüftereinheit |
-
1988
- 1988-06-22 DE DE8808007U patent/DE8808007U1/de not_active Expired
-
1989
- 1989-06-21 EP EP89907147A patent/EP0395748B1/de not_active Expired - Lifetime
- 1989-06-21 WO PCT/EP1989/000700 patent/WO1989012754A1/de not_active Ceased
- 1989-06-21 DE DE89907147T patent/DE58906320D1/de not_active Expired - Fee Related
Non-Patent Citations (1)
| Title |
|---|
| See references of WO8912754A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DE58906320D1 (de) | 1994-01-13 |
| WO1989012754A1 (fr) | 1989-12-28 |
| DE8808007U1 (de) | 1988-10-27 |
| EP0395748B1 (de) | 1993-12-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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| 17P | Request for examination filed |
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| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
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| 17Q | First examination report despatched |
Effective date: 19930119 |
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