EP1167776A2 - Ventilateur - Google Patents

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Publication number
EP1167776A2
EP1167776A2 EP01114758A EP01114758A EP1167776A2 EP 1167776 A2 EP1167776 A2 EP 1167776A2 EP 01114758 A EP01114758 A EP 01114758A EP 01114758 A EP01114758 A EP 01114758A EP 1167776 A2 EP1167776 A2 EP 1167776A2
Authority
EP
European Patent Office
Prior art keywords
heating
fan
fan according
blades
blade
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.)
Withdrawn
Application number
EP01114758A
Other languages
German (de)
English (en)
Other versions
EP1167776A3 (fr
Inventor
Volker Block
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.)
EGO Elektro Geratebau GmbH
Original Assignee
EGO Elektro Geratebau 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 EGO Elektro Geratebau GmbH filed Critical EGO Elektro Geratebau GmbH
Publication of EP1167776A2 publication Critical patent/EP1167776A2/fr
Publication of EP1167776A3 publication Critical patent/EP1167776A3/fr
Withdrawn legal-status Critical Current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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/30—Vanes
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/32—Rotors specially for elastic fluids for axial flow pumps
    • F04D29/38—Blades
    • F04D29/388—Blades characterised by construction
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0411—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between for domestic or space-heating systems

Definitions

  • the invention relates to a fan for generating a fluid flow, especially an air flow.
  • Fans for generating a fluid flow are used in a variety of ways.
  • Such fans have an impeller and at least one blade designed or arranged thereon for conveying the fluid.
  • such fans in the form of radial fans and in the form of axial fans are generally known.
  • radial fans an air flow is generated by the blade which points radially away from the axis of rotation of the radial fan and which is redirected by the housing surrounding the radial fan in a direction of outflow which is oriented transversely to the axis of rotation of the fan.
  • axial fans a fluid flow lying in the direction of the axis of rotation of the fan is generated.
  • Such fans are used in particular to convey gaseous fluids, in particular air.
  • liquid media can also be conveyed with such fans.
  • the pumped fluid not only pumps, but must also be heated.
  • the heating of the pumped fluid is usually carried out by means of one or more heating elements that the Fan are subordinate.
  • To monitor the temperature is then in the Usually, after the heating element, a temperature sensor is arranged by means of whose the fan power and / or the heating power of the heating element so is coordinated that the temperature of the delivered fluid can be controlled or regulated.
  • a disadvantage of such constructions is that the heating element that the Fan is downstream, a flow resistance for the fluid flow represents.
  • the delivery rate of the fan is larger than it would be necessary for the pure promotion of the fluid.
  • they have subordinate heating elements the disadvantage that, due to their function as flow resistance and as a fixed, flowed component, on them Contaminants contained in the fluid can settle. Act it the fluid is around air, so often sit on the heating elements Dust particles. These dust particles can also contaminate the Air such as fat and water vapors are stored. This is both for reasons of the output, the efficiency of the Heating element undesirable for reasons of hygiene.
  • the object of the invention is a fan for a heatable fluid flow to create, in which the required energy consumption is reduced.
  • a fan according to the invention has an impeller that has at least one Has blade for conveying the fluid. On at least part of the Blading the impeller of the fan is at least one heating element intended. The heating element is used to heat the fluid during the Conveyor operation of the fan.
  • heating elements are electrical Heating elements formed, these preferably from the amount of Thick film, strip heating and electrically conductive ceramics selected are.
  • heating elements on the Surface of the blades are arranged. It is particularly advantageous if the heating elements are arranged in heating element channels, the blade side are trained. It is also advantageous if the heating elements are designed to be the blade of a non-protruding, smooth surface Complete the surface contour.
  • Embodiments in which the heating elements are approximately preferred are also preferred lengthways and parallel to the front edge of the rotor in the direction of rotation of the rotor Shovel are arranged. It is advantageous if the heating elements overall over at least almost the entire longitudinal extent of the Extend shovel.
  • Temperature sensor is arranged.
  • a control or regulation of the heating power of heating elements made so that the temperature of the conveyed air is controlled or is regulated.
  • the temperature sensor is in Seen the direction of rotation of the blade - behind an existing one Heating element arranged.
  • temperature sensors are arranged on the blades, at least have a heating element.
  • the heating conductors are in summarized at least two groups, the heat output preferably by switching groups on and off, which may also be clocked is controlled or regulated by heating conductors.
  • the heating conductors of a blade are assigned to the same group.
  • it is possible that the heating conductors of a group in parallel to each other are arranged. In this, but also in other configurations of parallel interconnected heating conductors, it is an advantageous further Embodiment of the invention if each of the heating conductors has an associated one Burn protection against excessive heating.
  • the The fan is both an axial fan and a radial fan. If the fan is a radial fan, it is possible that the electrical contact is made in that the blades with the arranged heating conductors the electrical connection between the two Manufactures fan wheels of the radial fan and thus complements them to circuits.
  • the blades of the fan it is possible for the blades of the fan to be a heating element have, are formed from a basic structure, wherein a Thick-film heating element encased the basic structure and the outer flat Material layer forms the surface of the blade.
  • a preferred use of such a fan is found in Household appliances, such as (hot air) ovens or tumble dryers instead.
  • Household appliances such as (hot air) ovens or tumble dryers instead.
  • a Use is also in other electrical devices, such as Hair dryers, hand dryers and the like, possible. It can over it there are also other fields of application. It is essential only that a fluid is to be conveyed with the fan, which simultaneously should be heatable.
  • FIG. 1 shows the fan of an axial fan according to the invention in schematic representation.
  • the figure shows a fan 11, which is arranged in the middle of a not shown drive drivable impeller 12 and the four Blades arranged rotationally symmetrically to the center of the impeller 12 13.
  • the blades 13 can be simple, curved or flat trained, for example made of sheet metal, in particular stamped Shovels act on a surface in terms of conveying the fluid have, which with respect to the plane of rotation of the fan 11 Axis of rotation 14 is employed. Alternatively, it can be blades 13, which have been elaborately designed and in terms of their output certain speed were optimized.
  • the flat design of the shovel is regardless of the implementation of the invention.
  • Heating element for example a thick-film heating conductor 15 may be arranged on one part or - as shown - on each of the blades.
  • the blade 13 consists of a simple stamped sheet metal, then first an insulation layer and then the thick-film heating conductor 15 on the Sheet metal surface applied.
  • the Current flow is chosen so that a closed on a blade Current path is arranged, which in the region of the holder of the blade 13 Impeller 12 is contacted.
  • Conventional means such as soldering the contacts, as well as the possibility of To provide clamp connections that when attaching the blades 13 on Impeller 12 can be contacted automatically.
  • the blade 13 is still in the center of the thick-film heating conductor loop 15 enclosed, a temperature sensor 16 arranged. This is also contacted in the area of the impeller 12.
  • the signals and Measured values of the temperature sensor 16 can be used to control and regulate the Power and the speed of the fan can be used.
  • the contacting of the impeller to fixed, on the fan housing arranged components can, for example, via conventional brush contacts or but also via inductive couplings.
  • the heating conductor is preferably on the side arranged the blade 13, which is exposed to the stronger fluid flow; this is the front side as seen in the direction of rotation of the fan.
  • the two heating conductors can be located opposite one another Buckets are assigned to a group, which always join together or is switched off. The number of groups that are added is then the The heating power of the fan is affected. It is possible to do so within one individual group to interconnect the heating conductors 15 in parallel. comes it then damages one of the heating conductors, interrupting the appropriate circuit, the other heating conductor of the group is nevertheless intact.
  • two groups of heating conductors could be formed be, with the operation of only one group of heating conductors only approximately Half of the maximum possible heating output would be available.
  • clocked operation of the heating conductors can also be almost continuous regulation of the output up to the maximum possible output respectively.
  • Fig. 2 shows, also in a schematic representation, the example of a Fan 11 of a radial fan.
  • the fan 11 is around the axis of rotation 14 in the fan housing held rotatable. Corresponding ones can also be in the area of the axis of rotation 15 Contacts, especially brush sliding contacts, for contacting electrical Cables and for closing circuits are available.
  • the shovels 13 extend parallel to the axis of rotation 14 between the two Impellers 12. The surfaces of the blades 13 are flat or can be curved, slightly compared to the radial Alignment inclined so that medium is conveyed.
  • the blades 13 can be made from a framework that for example as a molded plastic part.
  • the heating element ends and / or a metal lead frame at the same time, which for the electrical connection of the individual heating elements and Contacting to the power supply is used, overmoulded (insert technology).
  • the heating element 15 extends over the entire length a blade 13. Parallel to the heating element 15 and in the direction of flow of the fluid behind it, the temperature sensor 16 extends.
  • Recesses for the heating conductor 15 can be made in the frame of the blade 13 and the temperature sensor 16 may be provided so that after the introduction of the Heating conductor and the temperature sensor a closed, smooth surface of the Shovel is given. It is also possible that the framework is chosen so that the blade is first supplemented by the heating conductor 15 and possibly supplemented by the Temperature sensor 16, the function and mode of operation of a closed Shovel has.
  • the heating conductor extends over the entire length of a shovel, it is so easiest if it is contacted on both sides of the impeller 12. As long as the axis of rotation 14 except on certain, provided Line sections is non-conductive and therefore the two impellers 12 galvanically separates from each other, the contacting can be done in a simple manner and power supply from one side of the fan to the other side be guided and thus the circuit through the heating element 15 only to closed circle.
  • not all blades 13 necessarily have to have a heating conductor 15 and / or a temperature sensor 16. It is also it is not absolutely necessary that all blades 13 which have a heating conductor 15 have a temperature sensor 16. It is also conceivable that a Blade 13 has a temperature sensor 16, although this blade 13 has no heating conductor 15.
  • the heating conductor 15 Summarize groups, the heating conductors within one group are preferably connected in parallel. Through the then possible step-by-step connection of individual groups is a stepped control the heating power of the fan possible.
  • the electrical contacting of the impeller 12 can, for example, via a slip ring 17 and carbon brushes running on the housing respectively.
  • the current is transmitted from the slip ring 17 via an electrical line 18, which mainly runs radially and which is also a distributor ring for Power to multiple blades 13 may include at least one Scoop 13 supplied, which has a heating element 15, which extends over the extends the entire width of a shovel.
  • On the other side of the bucket 13 is then in turn from an electrical line 18 and a Slip ring 17 the current is returned to the other side of the housing and from there again to the voltage source, so that a closed Circuit is created.
  • a Flat band heating conductor or another electrical heating conductor on the surface a shovel.
  • the use of a Ribbon heating conductor between the two impellers 12 of the fan 11 of the radial fan is arranged, can be produced in a simple manner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP01114758A 2000-06-29 2001-06-25 Ventilateur Withdrawn EP1167776A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10031725 2000-06-29
DE2000131725 DE10031725A1 (de) 2000-06-29 2000-06-29 Ventilator

Publications (2)

Publication Number Publication Date
EP1167776A2 true EP1167776A2 (fr) 2002-01-02
EP1167776A3 EP1167776A3 (fr) 2002-10-23

Family

ID=7647232

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01114758A Withdrawn EP1167776A3 (fr) 2000-06-29 2001-06-25 Ventilateur

Country Status (2)

Country Link
EP (1) EP1167776A3 (fr)
DE (1) DE10031725A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2408508A1 (es) * 2011-10-25 2013-06-20 BSH Electrodomésticos España S.A. Dispositivo de aparato doméstico
CN113153781A (zh) * 2021-03-26 2021-07-23 黄志明 可发热风扇及其制造方法
CN113357174A (zh) * 2020-03-06 2021-09-07 康唯特公司 改进的用于空气处理的设施和对此的风扇单元

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009026645B4 (de) * 2009-06-02 2015-03-12 BSH Bosch und Siemens Hausgeräte GmbH Gargerät
DE102011014856B4 (de) * 2011-03-24 2020-07-23 Borgwarner Ludwigsburg Gmbh Heizvorrichtung und Fahrzeugklimaanlage

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1737912A (en) * 1928-01-09 1929-12-03 E H Christian Rotary heating device
CH216491A (de) * 1940-12-16 1941-08-31 Walder Paul Warm- und Kaltluft-Ventilator.
DE3303979A1 (de) * 1982-03-01 1983-09-08 VEB Ingenieurbüro Elektrogeräte, DDR 9010 Karl-Marx-Stadt Anordnung mit rotierenden ptc-elementen zur heizung und gleichzeitigen foerderung von stroemungsmitteln
US5545009A (en) * 1995-09-08 1996-08-13 Ke; Chin-Fu Hot air/cold air dual-mode electric fan
WO1999049700A2 (fr) * 1998-03-27 1999-09-30 Thermo•Stone Usa, Llc Pale de ventilateur a film mince chauffant
EP0964211A2 (fr) * 1998-06-11 1999-12-15 Elettrocomponenti S.r.l. Ventilateur chauffant électrique

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2172935A (en) * 1985-03-26 1986-10-01 Liaw Shui Lai A cool and warm electric fan
DE19908327A1 (de) * 1999-02-26 2000-08-31 Behr Gmbh & Co Lüfterrad, insbesondere eines Lüfters einer Heizungs- oder Klimaanlage

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1737912A (en) * 1928-01-09 1929-12-03 E H Christian Rotary heating device
CH216491A (de) * 1940-12-16 1941-08-31 Walder Paul Warm- und Kaltluft-Ventilator.
DE3303979A1 (de) * 1982-03-01 1983-09-08 VEB Ingenieurbüro Elektrogeräte, DDR 9010 Karl-Marx-Stadt Anordnung mit rotierenden ptc-elementen zur heizung und gleichzeitigen foerderung von stroemungsmitteln
US5545009A (en) * 1995-09-08 1996-08-13 Ke; Chin-Fu Hot air/cold air dual-mode electric fan
WO1999049700A2 (fr) * 1998-03-27 1999-09-30 Thermo•Stone Usa, Llc Pale de ventilateur a film mince chauffant
EP0964211A2 (fr) * 1998-06-11 1999-12-15 Elettrocomponenti S.r.l. Ventilateur chauffant électrique

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2408508A1 (es) * 2011-10-25 2013-06-20 BSH Electrodomésticos España S.A. Dispositivo de aparato doméstico
CN113357174A (zh) * 2020-03-06 2021-09-07 康唯特公司 改进的用于空气处理的设施和对此的风扇单元
EP3875778A1 (fr) * 2020-03-06 2021-09-08 Konvekta Aktiengesellschaft Installation améliorée de traitement de l'air et unité de ventilateur associée
CN113153781A (zh) * 2021-03-26 2021-07-23 黄志明 可发热风扇及其制造方法

Also Published As

Publication number Publication date
DE10031725A1 (de) 2002-01-10
EP1167776A3 (fr) 2002-10-23

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