EP2898219A1 - Ventilatorvorrichtung - Google Patents
VentilatorvorrichtungInfo
- Publication number
- EP2898219A1 EP2898219A1 EP13766498.3A EP13766498A EP2898219A1 EP 2898219 A1 EP2898219 A1 EP 2898219A1 EP 13766498 A EP13766498 A EP 13766498A EP 2898219 A1 EP2898219 A1 EP 2898219A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat
- conducting element
- fan
- impeller
- heating device
- 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
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
-
- 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
- F04D29/522—Casings; Connections of working fluid for axial pumps especially adapted for elastic fluid pumps
- F04D29/526—Details of the casing section radially opposing blade tips
-
- 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
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
- F04D29/584—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps cooling or heating the machine
-
- 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
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
- F04D29/5853—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps heat insulation or conduction
Definitions
- the present invention relates to a fan device, in particular an axial fan, with a rotatably mounted in a fan housing impeller.
- Such fan devices are used inter alia in souptau - shear used, for example, indeanmaschine.
- condensation may form, which precipitates on the fan device. If this condensate freezes, it can come in particular in the area of the fan housing to form ice, which leads to disturbances. For example, it may happen that the impeller is blocked by ice that has formed between the fan housing and the impeller.
- the problem described above is not limited to situations in which the ice has formed in a switched-off state of the fan device and prevents the start-up of the fan device.
- the fan device with heating device should be robust and inexpensive to produce.
- the fan housing surrounds the impeller in the circumferential direction at least in sections, wherein the fan housing has a extending in the circumferential direction of the impeller cavity, in which a heating device according to the invention is arranged.
- the fan device has a heating device in order to counteract the formation of ice or to be able to defrost ice that has already formed, which has formed between the radial ends of the impeller and the areas of the fan housing surrounding the impeller.
- the heater is disposed in a cavity of the housing that extends at least partially around the impeller. It is understood that not all components of the heater must be arranged in the cavity. It can also be that individual
- Components of the heater are at least partially disposed outside the cavity. It is essential that the cavity is used to supply the heat to heat the fan housing.
- the fan device according to the invention can be used wherever the risk of formation of interfering ice exists.
- the fan device can be used, for example, in installations that are installed outdoors and are therefore exposed to the prevailing temperatures there.
- the fan device is associated with a heat exchanger. Heat exchangers are used, inter alia, in refrigeration systems and act as evaporators or condensers.
- the heater can be factory installed in the fan housing. In principle, however, it is also possible to place the heating device in the cavity only after delivery of the fan device.
- a fan device with a fan housing with a cavity of the type described above can also be retrofitted as needed. That is to say that the ventilator device is retrofitted - for example in the course of a device service - with a heating device arranged in the cavity and corresponding control devices.
- the heater can easily be removed and repaired or replaced in case of failure.
- the cavity and / or the heating device surround the impeller in the circumferential direction at least in sections, in particular completely.
- the cavity and / or the heater do not extend completely around the impeller.
- a heat-conducting element can be arranged between the heating device and the impeller in order to be able to distribute the heat generated by the heating device in a targeted manner and evenly in a region of the fan housing facing the impeller.
- the term "between” is to be understood such that the heat-conducting element is arranged in a radial direction, ie in a direction perpendicular to an axis of rotation of the impeller, between the heating device and the impeller.
- the heating device can be attached directly or indirectly to the heat-conducting element.
- the heat-conducting element may have attachment tabs, by means of which the heating device can be fastened to the heat-conducting element.
- the fastening tabs are integrally formed with the heat-conducting element. It may be provided that the heating device and the heat-conducting element are preassembled and then placed together at the factory during initial assembly or as a retrofit component in the cavity.
- the heat-conducting element surrounds the impeller in the circumferential direction at least in sections, preferably completely.
- the heat-conducting element can be in heat-conducting contact with the heating device and the fan housing.
- a direct contact between the heat-conducting element and the said components can be provided.
- the heat comprise a tensioning device, by means of which the heat-conducting element can be pressed against the fan housing.
- the heat-conducting element is embedded in a wall of the fan housing which defines the cavity between the heating device and the impeller. It is conceivable to embed the heat-conducting element completely in said wall, so that it is essentially surrounded on all sides by the material of the fan housing. However, it is also possible to leave exposed at least parts of the heat conducting element. In particular, a side of the heat-conducting element facing the heating device can be arranged such that it is not covered by the material of the fan housing in order to be able to establish the most direct possible contact between the heating device and the heat-conducting element.
- the heat-conducting element can also be a separate component which is arranged in the cavity.
- the heat-conducting element is a sheet-metal component.
- the heat-conducting element can in particular lie flat against the above-mentioned wall.
- the heat-conducting element may comprise a metal strip which is in particular made of aluminum, steel or copper.
- the heater is designed like a belt according to an embodiment of the fan device. It can comprise at least one heating wire.
- the heating device is formed by a plurality of windings of a heating wire. To improve the heat conduction between the heating wire and in contact with him components, he can be covered at least in sections by a good heat-conducting metal braid.
- the heating device comprises a heating fan through which hot air can be generated in the cavity or can be introduced into the cavity.
- Water may also be provided as the heating medium, which is heated in the cavity or which is introduced into the cavity.
- a cost-effectively manufacturable and sufficiently stable construction of the fan housing is obtained if this is made at least in the region of the cavity of a plastic material.
- This area of the fan housing - or the housing as a whole - can be produced for example by injection molding.
- a suitable plastic material is for example polypropylene. In order to adapt the heat conduction properties and / or the mechanical properties of the plastic material to the respective requirements, this may be mixed with a mineral filler.
- an extension of the heating device and / or the heat-conducting element in an axial direction parallel to an axis of rotation of the impeller is equal to or greater than an axial extent of the impeller in its outer side region.
- an axial extension of the heat-conducting element is greater than that of the heating device, ie the heat-conducting element is broad in this embodiment.
- thermo paste at least one heat-conducting pad and / or a heat-conducting adhesive is provided between the heating device and the heat-conducting element.
- said heat-conducting auxiliary means can be provided between the heat-conducting element and the fan housing, in particular if the former is not embedded in the fan housing.
- Fig. 1 shows a first embodiment of the invention
- FIG. 6 shows a plan view of an embodiment of a heat-conducting element with a heating device arranged thereon, 6a a region of the heat-conducting element shown in FIG. 6 in a side view,
- FIG. 7 is a plan view of an embodiment of a heat conducting element with clamping device
- Fig. 12 shows a cross section through an embodiment of a
- FIG. 1 shows a fan device 10 with an impeller 12, which has fan blades 16 arranged on a hub 14.
- the impeller 12 rotates about a rotation axis D.
- a fan housing Radially outside the impeller 12 is surrounded by a fan housing, which is formed in the embodiment of FIG. 1 by a housing ring 18. It is understood that other Gepatiun- gene are conceivable, which form a circumferentially at least partially embracing boundary the impeller.
- the ring 18 may for example be integrated into further housing components or attached thereto.
- FIG. 2 shows a section of a cross section through the fan device 10 (not to scale). The position of the cutting plane is shown in FIG. 1 indicated by the plane S. Since the construction of the fan device 10 is symmetrical in cross-section to the axis of rotation D, FIG. 2 omits the illustration of the right-hand part of the cross section, viewed from the axis of rotation D.
- the formation of ice in a gap region 20 between the free ends of the fan blades 16 and the ring 18 can lead to a blockage of the impeller 12.
- This ice is formed, for example, when condensate accumulates on the surface of the ring 18 or on the wings 16 and freezes there due to the prevailing temperatures. This can happen especially when the impeller 12 is at rest.
- the problem explained occurs, for example, in fan devices that are associated with heat exchangers of a cooling system. At the fins of the heat exchanger ice may form during operation of the cooling system, which affects the efficient heat exchange between the guided through the heat exchanger coolant and the ambient air and therefore must be defrosted. The resulting moisture during defrost can be reflected on the fan device and freeze there again.
- the areas of the fan device 10 lying in the lower region are usually particularly affected by ice formation, since condensing water flows down and / or drips down on the fan device 10 and freezes there.
- the fan device 10 is provided with a heating device 22. hen, which is arranged in a cavity 24 in the interior of the ring 18, as shown in Fig. 2 can be seen.
- the cavity 24 is formed by a substantially U-shaped housing member 26 which is closed by a cover 28.
- the housing component 26 of the ring 18 comprises a wheel 12 facing the radially inner side wall 26a and a radially outer side wall 26b.
- the heating device 22 comprises a heating tape 30, which bears against the wall 26a in a planar manner in order to heat the adjacent region of the ring 18 at least to the extent that the gap region 20 becomes or remains ice-free.
- the cavity 24 is insulating, i. only a little of the heat emitted by the heating tape 30 escapes unused to the outside.
- the direct contact of the heating strip 30 with the wall 26a ensures that the region of the ring 18 facing the gap region 20 is directly heated.
- any other housing construction can be used to surround the impeller 12 on the peripheral side. It is essential that at least in sections a cavity is provided which has a heating device. In the case of the fan device 10 shown in FIGS. 1 and 2, the cavity 24 extends completely through the ring 18.
- the heating tape 30 also completely surrounds the impeller 12, so that the wall 26a can be heated everywhere in the circumferential direction. In principle, however, it is also possible to heat only certain circumferential segments or individual discrete regions of the ring 18, if the respective application situation permits or requires this.
- Fig. 3 shows an embodiment 10 'of the fan device.
- the heating device 22 - here formed by a plurality of windings of a heating wire 30 '- does not lie directly on the wall 26a.
- a clamp-like heat-conducting element 32 is arranged, which absorbs a large part of the heating wire 30' given by the heating wire 30 'due to the good heat conduction properties of its material and passes on to the wall 26a, where it rests large area to the heat evenly distributed.
- a heat-conducting adhesive, a thermal paste and / or heat-conducting pads can be used.
- a switch or sensor may be provided which interrupts or throttles the power supply of the heater 22 upon reaching a predetermined temperature to prevent overheating. It can be provided, for example, to attach such a switch - for example a Klixon - or a suitable sensor to the heat-conducting element 32 and to control the heating power of the heating device 22 on the basis of the temperature of the heat-conducting element 32.
- a switch or sensor for example a Klixon - or a suitable sensor to the heat-conducting element 32 and to control the heating power of the heating device 22 on the basis of the temperature of the heat-conducting element 32.
- the temperature of the wall 26a can be used for this purpose. 4 shows an embodiment 10 "of the fan device, and also in the case of the fan device 10", a heat-conducting element 32 is provided which improves the transfer of the heat generated by the heating device 22 to the wall 26a.
- the heat-conducting element 32 of the fan device 10 is embedded, for example injected, in the wall 26a of the housing component 26. This results in particularly good heat conduction between In order to enable a direct heat conduction between the heating device 22 and the heat-conducting element 32, the side of the heat-conducting element 32 facing the heating device 22 is not covered by the material of the ring 18.
- the fan devices 10, 10 ', 10 ", 10"' have a substantially similar geometric configuration of the ring 18. It is understood, however, that the dimensioning and the shape of the ring 18 can be chosen freely in order to take into account the respective requirements. The same applies to the heating device 22. Their geometric design or their performance design can be adapted to the respective situation.
- the ring 18 In principle, it is possible to manufacture the ring 18 from metal. However, it has proved to be advantageous, inter alia for cost reasons, to manufacture the ring 18 from a plastic material, in particular from polypropylene. To the heat conduction properties of the material used this may be offset with talc. As a result, a faster and more homogeneous distribution of the heat generated by the heater 22 is achieved. Suitable materials for producing the heat-conducting element 32 have proven to be copper, aluminum and steel.
- FIG. 6 shows a heat conducting element 32 which is not completely provided with the heating device 22 in the circumferential direction in order to take account of the fact that, for the reasons described above, ice formation often occurs predominantly in the lower position of the fan device.
- Fig. 6 also an area is marked, which is shown in Fig. 6a enlarged in side view.
- FIG. 6 a shows the heat-conducting element 32 in a side view in order to make it clear that the heating device 22 comprises a heating wire 30 'which is laid in several loops between end points E. That is, the heating wire 30 'only covers a circumferential region of the heat-conducting element 32 that lies between the end points E. It is understood that the heat-conducting element 32 does not necessarily have to be a closed ring.
- a heat conducting element 32 is shown, which is essentially formed by an open ring. The two open ends of the heat-conducting element 32 are provided with tabs 34, which can be pulled together by means of a clamping device 36.
- FIG. 6 a shows the heat-conducting element 32 in a side view in order to make it clear that the heating device 22 comprises a heating wire 30 'which is laid in several loops between end points E. That is, the heating wire 30 'only covers a circumferential region of the heat-conducting element 32 that lies between the end points E. It is understood
- the tensioning device 36 comprises a screw 37 which cooperates with a nut 38 in order to be able to tension the annular heat-conducting element 32. If you tighten the nut 38, the heat-conducting element 32 is pressed against the wall 26a of the cavity 24, whereby it rests flat on the wall 26a and thus allows efficient heat transfer.
- cable ties may be used, which are preferably made of metal, since commonly used plastic can age and become brittle or brittle in the temperatures occurring during operation of the heating device 22.
- a U-shaped bracket 39 instead of the screw 37 and the nut 38 and a U-shaped bracket 39 are used, which engages in formed at the free ends of the hillsleitelements 32 mounting portions 40.
- the attachment portions 40 may be punched, for example
- the U-shaped configuration of the clip 39 gives it elastic properties, by which the voltage of the furnishedleitelements 32 is determined. It is understood that a plurality of staggered mounting portions 40 may be provided (indicated by dashed lines) in order to adjust the radius of the heat-conducting element 32 to the particular geometry of the cavity 24 present. It may well happen that the free ends of the heat-conducting element 32 overlap. 9 shows an alternative embodiment of the connection of the free ends of the heat-conducting element 32, which, in contrast to the embodiment shown in FIG. 7, comprises two lugs 34 'extending in the circumferential direction of the heat-conducting element 32. The tabs 34 'are connected together by means of a mandrel or pin 41.
- the embodiment of the heat-conducting element 32 shown in FIG. 10 is provided with fastening tabs 43.
- the attachment tabs 43 are formed integrally with a band-shaped receiving section 45 of the heat-conducting element 32 the heater 22 is arranged.
- the fastening straps 43 are bent over until they press them firmly against the receiving section 45.
- the one-piece design of the tabs 43 and the receiving portion 45 allows on the one hand a simple production of the heat-conducting element 32 of a single sheet metal component, on the other hand take the tabs 43, the heat generated by the heater 22 and forward them.
- FIG. 1 1 shows a cross section through the embodiment of the heat-conducting element 32 shown in FIG. 10 with a heating device mounted thereon.
- the heating wire 30 'applied to the receiving section 45 of the heat-conducting element 32 in several windings is reliably fixed by the bent-over tab 43 , An improved use of the heating power provided by the heater 22 is achieved when a heating wire 30 'is used, which is covered by a good heat-conducting material.
- FIG. 12 shows an embodiment of such a heating wire 30 '.
- the core of the heating wire 30 ' is formed by an electrical conductor 47, which is surrounded by a heat-resistant insulator 49 - for example, a corresponding plastic.
- the insulator 49 is in turn surrounded by a metallic braid 51, in particular by an aluminum braid, which has a high thermal conductivity.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201210218286 DE102012218286A1 (de) | 2012-10-08 | 2012-10-08 | Ventilatorvorrichtung |
| PCT/EP2013/069425 WO2014056692A1 (de) | 2012-10-08 | 2013-09-19 | Ventilatorvorrichtung |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2898219A1 true EP2898219A1 (de) | 2015-07-29 |
| EP2898219B1 EP2898219B1 (de) | 2016-12-21 |
Family
ID=49237193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13766498.3A Not-in-force EP2898219B1 (de) | 2012-10-08 | 2013-09-19 | Ventilatorvorrichtung |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP2898219B1 (de) |
| CN (1) | CN104704246B (de) |
| DE (1) | DE102012218286A1 (de) |
| RU (1) | RU2596704C1 (de) |
| UA (1) | UA112607C2 (de) |
| WO (1) | WO2014056692A1 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102012109544A1 (de) * | 2012-10-08 | 2014-04-10 | Ebm-Papst Mulfingen Gmbh & Co. Kg | "Wandring mit Wandringheizung für Axiallüfter" |
| CN106568144A (zh) * | 2015-10-07 | 2017-04-19 | 宁夏琪凯节能设备有限公司 | 一种节能通风系统 |
| DE102019119626A1 (de) * | 2019-07-19 | 2021-01-21 | Ebm-Papst Mulfingen Gmbh & Co. Kg | Gehäusering eines Axialventilators |
| US12376257B2 (en) | 2022-01-19 | 2025-07-29 | Dell Products Lp | System and method for a radio module on premise of a cooling fan |
| DE102024205680A1 (de) * | 2024-06-19 | 2025-12-24 | Ziehl-Abegg Se | Ventilator und Verfahren zum Beheizen eines Ventilators |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1813023A (en) * | 1928-08-11 | 1931-07-07 | Frank J Cheslock | Electric heater |
| US1996195A (en) * | 1933-05-05 | 1935-04-02 | Julian K Ferguson | Electric fan |
| US2583754A (en) * | 1949-09-06 | 1952-01-29 | Arvin Ind Inc | Electric fan and heater |
| US2765393A (en) * | 1954-03-29 | 1956-10-02 | New York Shipbuilding Corp | Automatic fan heater |
| US3103796A (en) * | 1960-07-15 | 1963-09-17 | Hussmann Refrigerator Co | Refrigeration system |
| US4146776A (en) * | 1976-11-08 | 1979-03-27 | Aubrey Manufacturing, Inc. | Ceiling mounted forced circulation electric air heater |
| DE2910344C2 (de) * | 1979-03-16 | 1985-12-12 | Linde Ag, 6200 Wiesbaden | Kühlmöbel |
| IT250411Y1 (it) * | 2000-08-03 | 2003-09-10 | Nicotra Ind S P A | Ventilatore centrifugo |
| US7168917B2 (en) * | 2003-12-03 | 2007-01-30 | American Standard International Inc. | Heat-generating blower housing |
| DE202005002486U1 (de) * | 2005-02-16 | 2006-06-22 | Liebherr-Hausgeräte Ochsenhausen GmbH | Kühl- und/oder Gefriergerät |
| ITPD20060193A1 (it) * | 2006-05-16 | 2007-11-17 | Ln 2 Srl A Socio Unico | Ventilatore centrifugo, particolarmente per cappe aspiranti ed estrattori di fumi |
| CN202234847U (zh) * | 2011-08-23 | 2012-05-30 | 九阳股份有限公司 | 一种立体加热的豆浆机用杯体 |
-
2012
- 2012-10-08 DE DE201210218286 patent/DE102012218286A1/de not_active Withdrawn
-
2013
- 2013-09-19 UA UAA201503214A patent/UA112607C2/uk unknown
- 2013-09-19 WO PCT/EP2013/069425 patent/WO2014056692A1/de not_active Ceased
- 2013-09-19 RU RU2015116249/06A patent/RU2596704C1/ru active
- 2013-09-19 CN CN201380052347.4A patent/CN104704246B/zh not_active Expired - Fee Related
- 2013-09-19 EP EP13766498.3A patent/EP2898219B1/de not_active Not-in-force
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2014056692A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| RU2596704C1 (ru) | 2016-09-10 |
| DE102012218286A1 (de) | 2014-04-10 |
| EP2898219B1 (de) | 2016-12-21 |
| CN104704246A (zh) | 2015-06-10 |
| UA112607C2 (uk) | 2016-09-26 |
| WO2014056692A1 (de) | 2014-04-17 |
| CN104704246B (zh) | 2017-07-11 |
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