ITMI981324A1 - SERIES OF SELF-HEATING FANS FOR HOT AIR CONVEYORS WITH ROTATING FAN - Google Patents
SERIES OF SELF-HEATING FANS FOR HOT AIR CONVEYORS WITH ROTATING FAN Download PDFInfo
- Publication number
- ITMI981324A1 ITMI981324A1 ITMI981324A ITMI981324A1 IT MI981324 A1 ITMI981324 A1 IT MI981324A1 IT MI981324 A ITMI981324 A IT MI981324A IT MI981324 A1 ITMI981324 A1 IT MI981324A1
- Authority
- IT
- Italy
- Prior art keywords
- blades
- fan
- series
- fan according
- hot air
- Prior art date
Links
- 238000010438 heat treatment Methods 0.000 title claims description 14
- 239000004020 conductor Substances 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims 1
- 238000010168 coupling process Methods 0.000 claims 1
- 238000005859 coupling reaction Methods 0.000 claims 1
- 239000000463 material Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- WYTGDNHDOZPMIW-RCBQFDQVSA-N alstonine Natural products C1=CC2=C3C=CC=CC3=NC2=C2N1C[C@H]1[C@H](C)OC=C(C(=O)OC)[C@H]1C2 WYTGDNHDOZPMIW-RCBQFDQVSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000007650 screen-printing Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Solid Materials (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Resistance Heating (AREA)
Description
DESCRIZIONE DESCRIPTION
dell’invenzione industriale avente per titolo: of the industrial invention entitled:
“Serie di ventole autoriscaldanti per convogliatori di aria calda a ventola rotante” "Series of self-heating fans for hot air conveyors with rotating fan"
La presente invenzione concerne una serie di ventole autoriscaldanti per convogliatori di aria calda a ventola rotante. The present invention relates to a series of self-heating fans for rotating fan hot air conveyors.
Normalmente le ventole per gli usi suddetti si limitano a generare un flusso di aria, al cui riscaldamento provvedono opportuni elementi riscaldanti (in particolare a resistenza elettrica) posti a monte o a valle della ventola. Normally the fans for the aforementioned uses are limited to generating a flow of air, which is heated by suitable heating elements (in particular with electrical resistance) placed upstream or downstream of the fan.
La presenza di tali elementi riscaldanti nel circuito del flusso d’aria determina indesiderabili perdite di carico, unitamente a problemi di ingombro. The presence of these heating elements in the air flow circuit causes undesirable pressure drops, together with space problems.
Scopo della presente invenzione è ora quello di realizzare una serie di ventole che si riscaldino autonomamente senza che sia necessario l’impiego di separati elementi riscaldanti a monte o a valle delle stesse nel circuito di flusso dell’aria. The purpose of the present invention is now to create a series of fans that heat up independently without the need for the use of separate heating elements upstream or downstream of the same in the air flow circuit.
In accordo con l’invenzione tale scopo è raggiunto con una serie di ventole che hanno la caratteristica comune di avere pale con percorsi elettrici resistivi alimentati elettricamente in modo da generare essi stessi calore di riscaldamento dell’aria convogliata. In accordance with the invention, this purpose is achieved with a series of fans that have the common characteristic of having blades with resistive electrical paths electrically powered in order to generate the heating heat of the conveyed air themselves.
In questo modo le pale della girante, alimentate elettricamente attraverso l’albero della girante o per mezzo di contatti elettrici striscianti, si riscaldano e, sostituendosi agli usuali elementi riscaldanti, irradiano a loro volta calore che provvede al riscaldamento del flusso d’aria convogliato. In this way the impeller blades, electrically powered through the impeller shaft or by means of sliding electrical contacts, heat up and, replacing the usual heating elements, radiate heat in turn which provides for the heating of the conveyed air flow.
L’eliminazione degli elementi riscaldanti consente di evitare perdite di carico nel circuito di flusso dell’aria e minimizza i problemi di ingombro. The elimination of the heating elements allows to avoid pressure losses in the air flow circuit and minimizes space problems.
Il costo delle ventole secondo l’invenzione sarà ovviamente superiore a quello delle ventole tradizionali, ma comunque inferiore alla somma dei costi della ventola e degli elementi riscaldanti. The cost of the fans according to the invention will obviously be higher than that of traditional fans, but still lower than the sum of the costs of the fan and the heating elements.
Alcune forme di realizzazione delle ventole secondo l’invenzione sono illustrate a titolo di esempio non limitativo negli uniti disegni, in cui: Some embodiments of the fans according to the invention are illustrated by way of non-limiting example in the accompanying drawings, in which:
la figura 1 mostra in pianta dal basso una prima ventola assiale per ventilatore da soffitto in accordo con la presente invenzione; Figure 1 shows a bottom plan view of a first axial fan for a ceiling fan in accordance with the present invention;
la figura 2 mostra detta ventola assiale in vista laterale parzialmente sezionata; Figure 2 shows said axial fan in a partially sectioned side view;
la figura 3 mostra in pianta dal basso una seconda ventola assiale per ventilatore da soffitto in accordo con la presente invenzione; Figure 3 shows a bottom plan view of a second axial fan for a ceiling fan in accordance with the present invention;
la figura 4 mostra la stessa ventola assiale in vista laterale parzialmente sezionata; Figure 4 shows the same axial fan in a partially sectioned side view;
la figura 5 mostra, in parte in vista laterale e in parte in sezione assiale, una ventola tangenziale in accordo con la presente invenzione; Figure 5 shows, partly in lateral view and partly in axial section, a tangential fan according to the present invention;
la figura 6 mostra detta ventola tangenziale vista da destra rispetto alla figura 5; figure 6 shows said tangential fan seen from the right with respect to figure 5;
la figura 7 mostra detta ventola tangenziale vista da sinistra rispetto alla figura 5; figure 7 shows said tangential fan seen from the left with respect to figure 5;
la figura 8 mostra detta ventola tangenziale in sezione trasversale secondo la linea Vili- Vili di figura 5; Figure 8 shows said tangential fan in cross section along the line VIII-VIII of Figure 5;
le figure 9 e 10 mostrano, rispettivamente in vista laterale parzialmente sezionata e in vista da sinistra, un primo esempio di alimentazione elettrica della ventola tangenziale delle figure 5-8; Figures 9 and 10 show, respectively in a partially sectioned side view and in a view from the left, a first example of electrical power supply of the tangential fan of Figures 5-8;
le figure 11 e 12 mostrano, rispettivamente in vista laterale parzialmente sezionata e in vista da sinistra, un secondo esempio di alimentazione elettrica della ventola tangenziale delle figure 5-8; Figures 11 and 12 show, respectively in a partially sectioned side view and in a left view, a second example of electrical power supply of the tangential fan of Figures 5-8;
la figura 13 mostra in sezione assiale una ventola centrifuga in accordo con la presente invenzione; figure 13 shows in axial section a centrifugal fan according to the present invention;
la figura 14 mostra la suddetta ventola centrifuga vista da destra rispetto alla figura 13; Figure 14 shows the aforementioned centrifugal fan seen from the right with respect to Figure 13;
la figura 15 mostra la stessa ventola centrifuga vista in sezione secondo la linea XV -XV di figura 13. figure 15 shows the same centrifugal fan seen in section along the line XV -XV of figure 13.
La ventola assiale delle figure 1 e 2, esemplificativamente prevista per un ventilatore da soffitto, comprende tre pale equidistanziate 1, che si estendono radialmente da un corpo centrale di supporto 2, che è fissato alla parte esterna girevole 3 di un motore elettrico 4, la cui parte interna fissa 5 è portata da un’asta 6 esemplificativamente appesa ad un soffitto 7. The axial fan of Figures 1 and 2, provided by way of example for a ceiling fan, comprises three equally spaced blades 1, which extend radially from a central support body 2, which is fixed to the rotating outer part 3 of an electric motor 4, the whose internal fixed part 5 is carried by a rod 6 hanging by way of example from a ceiling 7.
Su una o entrambe le facce di ogni pala 1 è applicata per serigrafia una resistenza elettrica 8, in materiale metallico o chimico, che è collegata in serie con le analoghe resistenze elettriche delle altre due pale in modo da formare un’unica resistenza elettrica le cui estremità sono collegate ad altrettanti conduttori elettrici 9, 9’, che a loro volta terminano in spazzole 10, 10’ fissate alla parte rotante 3 del motore 4. Le due spazzole 10, 10’ strisciano su rispettivi collettori ad anello 11, 11’ fissati all’asta 6 e dotati di opportuna alimentazione elettrica. On one or both faces of each blade 1 an electric resistance 8, made of metallic or chemical material, is applied by screen printing, which is connected in series with the analogous electrical resistances of the other two blades so as to form a single electrical resistance whose ends are connected to as many electrical conductors 9, 9 ', which in turn terminate in brushes 10, 10' fixed to the rotating part 3 of the motor 4. The two brushes 10, 10 'slide on respective ring collectors 11, 11' fixed auction 6 and equipped with suitable electrical power supply.
Mentre la ventola ruota creando un flusso d’aria, le resistenze elettriche 8 sono così alimentate elettricamente e generano calore per effetto Joule, riscaldando le pale 1. Queste cedono a loro volta calore al flusso d’aria, riscaldandolo. While the fan rotates creating a flow of air, the electrical resistances 8 are thus electrically powered and generate heat by the Joule effect, heating the blades 1. These in turn transfer heat to the air flow, heating it.
La ventola assiale delle figure 3 e 4 è analoga a quella delle figure 1 e 2, di cui ripete la maggior parte dei numeri di riferimento, con l’eccezione rappresentata dal fatto che ogni pala è realizzata essa stessa in materiale elettricamente conduttore, o è interamente ricoperta con tale materiale, e presenta una fessura centrale longitudinale 12 che la divide in due parti affiancate 13, 13’ con estremità esterne in comune ed estremità interne separate e collegate da cavetti 14, 14’ all’uno e all’altro dei due conduttori elettrici 9, 9’. The axial fan of Figures 3 and 4 is similar to that of Figures 1 and 2, of which most of the reference numbers are repeated, with the exception represented by the fact that each blade is itself made of electrically conductive material, or is entirely covered with this material, and has a central longitudinal slot 12 which divides it into two side by side parts 13, 13 'with external ends in common and internal ends separated and connected by cables 14, 14' to one and the other of the two electrical conductors 9, 9 '.
La ventola tangenziale delle figure 5-8 è composta da due dischi terminali 15 in materiale elettricamente isolante, dall’uno all’altro dei quali si estende a serpentina un’unica striscia 16 di materiale flessibile elettricamente conduttore, che si impegna in coppie di fessure radiali 17 dei dischi 15 in modo da formare una successione circonferenziale di pale conduttrici estendentisi da un disco all’altro. Lina molla elicoidale 18 avvolta su un albero centrale 19 e reagente tra uno dei dischi 15 ed una flangia intermedia 20 dell’albero 19 mantiene opportunamente in tensione la striscia conduttrice 16. The tangential fan of Figures 5-8 is composed of two terminal discs 15 made of electrically insulating material, from one to the other of which a single strip 16 of electrically conductive flexible material extends like a serpentine, which engages in pairs of slots 17 of the discs 15 so as to form a circumferential succession of conductive blades extending from one disc to another. The helical spring 18 wound on a central shaft 19 and reacting between one of the discs 15 and an intermediate flange 20 of the shaft 19 keeps the conductive strip 16 suitably under tension.
L’alimentazione elettrica per le pale 16 può essere fornita nel modo mostrato nelle figure 9 e 10, ossia agganciando le opposte estremità 21 e 22 della striscia 16 alla faccia esterna di uno dei dischi 15, in corrispondenza di piazzole conduttrici 23 e 24 a loro volta comunicanti elettricamente con rispettivi anelli collettori 25 e 26 che si sviluppano sulla stessa faccia suddetta e su cui strisciano rispettive spazzole 27 e 28 collegate a conduttori elettrici 29 e 30. The electrical power supply for the blades 16 can be provided in the way shown in Figures 9 and 10, i.e. by hooking the opposite ends 21 and 22 of the strip 16 to the outer face of one of the discs 15, in correspondence with conductive pads 23 and 24 therein. vault electrically communicating with respective collector rings 25 and 26 which develop on the same aforesaid face and on which respective brushes 27 and 28, connected to electrical conductors 29 and 30, slide.
In alternativa, come mostrato nelle figure 11 e 12, uno degli anelli collettori può svilupparsi lungo il dorso perimetrale del disco ed essere in contatto elettrico con una rispettiva spazzola strisciante sul dorso medesimo. Alternatively, as shown in Figures 11 and 12, one of the collector rings can extend along the perimeter back of the disc and be in electrical contact with a respective brush sliding on the back itself.
Infine, la ventola centrifuga della figure 13-15 comprende un disco rotante 31, che è fissato ad un alberino di supporto e comando 32 e da una cui faccia si estendono perpendicolarmente pale arcuate 33 sulle quali sono riportate per serigrafia rispettive resistenze elettriche 34 in materiale metallico o chimico. Finally, the centrifugal fan of Figures 13-15 comprises a rotating disk 31, which is fixed to a support and control shaft 32 and from one face of which arcuate blades 33 extend perpendicularly, on which respective electrical resistances 34 in material are printed. metallic or chemical.
Le resistenze 34 sono alimentate elettricamente mediante collegamento elettrico di rispettive estremità 35 e 36 delle resistenze stesse a rispettivi anelli collettori 37 e 38 previsti sull’opposta faccia del disco 31 e cooperanti con rispettive spazzole 39 e 40 collegate a conduttori elettrici 41 e 42. The resistors 34 are electrically powered by electrical connection of respective ends 35 and 36 of the resistors themselves to respective collector rings 37 and 38 provided on the opposite face of the disk 31 and cooperating with respective brushes 39 and 40 connected to electrical conductors 41 and 42.
Claims (5)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITMI981324 ITMI981324A1 (en) | 1998-06-11 | 1998-06-11 | SERIES OF SELF-HEATING FANS FOR HOT AIR CONVEYORS WITH ROTATING FAN |
| EP99201581A EP0964211A3 (en) | 1998-06-11 | 1999-05-19 | Electrically heated fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ITMI981324 ITMI981324A1 (en) | 1998-06-11 | 1998-06-11 | SERIES OF SELF-HEATING FANS FOR HOT AIR CONVEYORS WITH ROTATING FAN |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ITMI981324A1 true ITMI981324A1 (en) | 1999-12-13 |
Family
ID=11380218
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ITMI981324 ITMI981324A1 (en) | 1998-06-11 | 1998-06-11 | SERIES OF SELF-HEATING FANS FOR HOT AIR CONVEYORS WITH ROTATING FAN |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0964211A3 (en) |
| IT (1) | ITMI981324A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10031725A1 (en) * | 2000-06-29 | 2002-01-10 | Ego Elektro Geraetebau Gmbh | Fan used e.g. in domestic appliances and vehicles, employs heated blades |
| US7043146B2 (en) | 2003-12-15 | 2006-05-09 | Solomon Semaza | All season heat fan with electric heating elements powered by rotating rings and ball bearings |
| US20140056578A1 (en) * | 2011-02-07 | 2014-02-27 | Soro Holding Aps | Heating Fan |
| EP4316322A1 (en) * | 2022-08-02 | 2024-02-07 | Vorwerk & Co. Interholding GmbH | Flow generator, kitchen appliance and method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1737912A (en) * | 1928-01-09 | 1929-12-03 | E H Christian | Rotary heating device |
| DD208445A1 (en) * | 1982-03-01 | 1984-05-02 | Elektrogeraete Ingbuero Veb | ARRANGEMENT WITH ROTATING PTC ELEMENTS FOR HEATING AND SIMULTANEOUS SUPPLEMENT OF SPRAYING AGENTS |
| US4782213A (en) * | 1987-08-19 | 1988-11-01 | Paul Teal | Ceiling fan electrically heating environmental air |
| WO1999049700A2 (en) * | 1998-03-27 | 1999-09-30 | Thermo•Stone Usa, Llc | Thin film heated fan blade |
-
1998
- 1998-06-11 IT ITMI981324 patent/ITMI981324A1/en unknown
-
1999
- 1999-05-19 EP EP99201581A patent/EP0964211A3/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| EP0964211A2 (en) | 1999-12-15 |
| EP0964211A3 (en) | 2002-06-26 |
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