SI25187A - A household appliance with electrical component of electromagnetic waves - Google Patents
A household appliance with electrical component of electromagnetic waves Download PDFInfo
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- SI25187A SI25187A SI201600111A SI201600111A SI25187A SI 25187 A SI25187 A SI 25187A SI 201600111 A SI201600111 A SI 201600111A SI 201600111 A SI201600111 A SI 201600111A SI 25187 A SI25187 A SI 25187A
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- screen element
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/76—Prevention of microwave leakage, e.g. door sealings
Abstract
Gospodinjski aparat, ki obsega vsaj eno električno komponento, ki generira elektromagnetno valovanje, in vsaj en konstrukcijski element, ki ima takšne snovno-geometrijske lastnosti, da je odziven na elektromagnetno valovanje s premikanjem zlasti v frekvenci elektromagnetnega valovanja, pri čemer je med omenjeno električno komponento, ki je vir elektromagnetnega valovanja, in omenjeni konstrukcijski element razporejen zaslonski element.A household appliance comprising at least one electrical component generating electromagnetic waves and at least one structural element having such material-geometric properties that it is responsive to electromagnetic waves by moving in particular in the frequency of electromagnetic waves, wherein said electrical component , which is a source of electromagnetic waves, and said structural element is arranged on the screen element.
Description
Predlagani izum se nanaša na gospodinjski aparat, ki vsebuje vsaj eno električno komponento, ki generira elektromagnetno valovanje, prednostno vgradna pečica z vsaj enim ventilatorjem in elekromotorjem na izmenični elekrični tok.The present invention relates to a household appliance containing at least one electrical component that generates electromagnetic waves, preferably a built-in oven with at least one fan and an AC motor.
Znano je, da gospodinjski aparati vsebujejo električne komponente, ki pri svojem delovanju generirajo in oddajajo v okolico relativno močno elektromagnetno valovanje. Takšne komponente so na primer transformatorji in elektromotorji, ki delujejo na izmenični tok. Te komponenete so lahko v gospodinjskih aparatih kot samostojne enote ali pa kot sestavni deli vitalnih komponent gospodinjskega aparata, kot je na primer ventilator vgradne pečice, ki ga poganja izmenični elektromotor. Znano je tudi, da je jakost elektromagnetnega valovanja (v nadaljevanju EM valovanje) v določeni prostorski točki odvisna od intenzvnosti oddajanja oziroma moči izvora in oddaljenosti od njega. Z večanjem razdalje od izvora se gostota elektromagnetnega valovanja hitro zmanjšuje. V primeru, da se v področju povečane gostote EM valovanja, to je blizu izvora, nahaja kovinski element, ki ima takšne snovno-geometrijske lastnosti, da je odziven na EM valovanje, lahko pride do nezaželenega nihanja tega kovinskega elementa in s tem do generiranja nezaželenih vibracij in hrupa, ki se širi v okolico. Najbolj je to izraženo v primerih, ko je električna komponeneta, ki generira EM valovanje, zaradi prostorskih zahtev konstrukcije nameščena blizu kakšne od zunanjih sten aparata, ki je iz kovinskega materiala, na primer feromagnetnega materiala, z relativno veliko površino in relativno majhno debelino. To je še zlasti problematično pri tistih napravah, zlasti gospodinjskih aparatih, kjer so že manjše vibracije in z njimi povezan hrup precej moteče, kot je to primer vgradne pečice, kije vgrajena v kuhinjski element.Household appliances are known to contain electrical components that generate and emit relatively strong electromagnetic waves during their operation. Such components are, for example, transformers and AC motors. These components can be in home appliances as standalone units or as components of vital components of a household appliance, such as a built-in oven fan driven by an alternating electric motor. It is also known that the strength of the electromagnetic wave (hereinafter referred to as EM wave) at a given spatial point depends on the intensity of the emission or the power of the source and the distance from it. As the distance from the source increases, the electromagnetic wave density decreases rapidly. If a metal element with such material-geometric properties that is responsive to the EM wave is located in the region of increased EM wave density, i.e. near the origin, unwanted oscillation of this metal element can occur and thus generate undesirable vibrations and noise spreading out into the surroundings. This is most pronounced in cases where, due to the spatial requirements of the structure, the electrical component that generates EM waves is positioned close to one of the outer walls of the apparatus, which is of metallic material, such as ferromagnetic material, with a relatively large surface area and relatively small thickness. This is especially problematic for those appliances, especially household appliances, where even minor vibrations and associated noise are quite annoying, such as a built-in oven fitted into a kitchen element.
• ·• ·
Po do sedaj znanih rešitvah se poskuša zmanjšati vpliv EM valovanja na vibracije okoliških kovinskih konstrukcijskih elemetov, zlasti feromagnetnih elementov na način, da so viri EM valovanja, kot so elektromotorji in transformatoiji, dovolj odmaknjeni od takšnih konstrukcijskih elementov ali da so slednji geometrijsko tako oblikovani ali pritrjeni na sosednje elemente, da je zmajšana njihova odzivnost na vzbujevalno frekvenco EM valovanja. To se lahko na primer doseže na stenah ohišja z vtisi v površino, s katerimi se spremeni oz. poveča togost in s tem prestavi področje lastnih frekvenc izven vzbujevalne frekvence EM valovanja, nadalje s povečanjem debeline osnovnega materiala stene ipd. Vendar so takšni ukrepi, še zlasti v primeru gospodinjskih aparatov, omejeni zaradi prostorskih zahtev, ker zmanjševanje aktivnega delovnega prostora ni zaželena kot tudi zaradi ekonomskih zahtev, ki ne dovoljujejo zviševanja proizvodnih stroškov.The known solutions thus far seek to minimize the influence of EM waves on the vibrations of the surrounding metal structural members, in particular ferromagnetic elements, in such a way that the sources of EM waves such as electric motors and transformations are sufficiently spaced from such structural members or that they are geometrically shaped or attached to adjacent elements to reduce their response to the excitation frequency of the EM wave. This can be achieved, for example, on the walls of the housing with impressions of the surface with which it changes or changes. increases the stiffness and thereby moves the eigenfrequency beyond the excitation frequency of the EM wave, further increasing the thickness of the base material of the wall, etc. However, such measures, especially in the case of household appliances, are limited by space requirements, since the reduction of active work space is not desirable, as well as by economic requirements that do not allow an increase in production costs.
Naloga izuma je odpraviti navedene pomanjkjivosti, zlasti preprečiti oziroma bistveno zmanjšati Siljenje EM valovanja, ki ga oddajajo v gospodinjskem aparatu vgrajene električne komponente na okoliške konstrukcijske elemente in s tem preprečiti vibracije teh konstrukcijskih elementov, pri čemer mora biti rešitev enostavna in zasnovana tako, da bo osnovna konstrukcija gospodinjskega aparata ostala nespremenjena, hkrati pa bodo upoštevane vse varnostne zahteve. Rešitev mora zadostiti tudi ekonomskim zahtevam.It is an object of the invention to remedy the aforementioned disadvantages, in particular to prevent or substantially reduce the EM wave force emitted by household electrical components on the surrounding structural elements, thereby preventing the vibration of these structural elements, whereby the solution must be simple and designed so that the basic construction of the household appliance will remain unchanged and all safety requirements will be respected. The solution must also meet economic requirements.
Tenični problem je rešen z izumom, katerega glavna značilnost je v tem, da je med električno komponento, ki je vir EM valovanja, in konstrukcijski element, ki ima takšne snovno-geometrijske lastnosti, da je odziven na EM valovanje, razporejen kovinski zaslonski element.The tenic problem is solved by the invention, the main feature of which is that a metal screen element is arranged between the electrical component which is the source of the EM wave and a structural element having such material-geometrical properties that it is responsive to the EM wave.
Kovinski zaslonski element je konstrukcijski element, ki zaradi snovnogeometrijskih lastnosti prepreči širitev EM valovanja s ponorom oz. absorbcijo letega, s transformacijo v toploto in/ali z odbojem. Zaslonski element je lahko npr.A metal screen element is a structural element which, due to its geometric properties, prevents the propagation of the EM wave by a sink, or. absorption of the fly, by transformation into heat and / or by reflection. The display element may be e.g.
• · β ······ · · · · · · izdelan iz kovinskega materiala, še posebej magnetnega materiala, kot je npr. feromagnetni material.• · β ······ · · · · · · Made of metallic material, especially magnetic material such as. ferromagnetic material.
Zaslonski element je razporejen med elektično komponento, ki je vir EM valovanja, in konstrukcijskim elmentom, pri čemer je ugodno zlasti, če je razmik do elektične komponente manjši od razmika do konstrukcijskega elementa, da se zajame čim večji del EM valovanja. Kovinski zaslonski element je lahko pritrjen na električno komponento, ki je vir EM valovanja. Pri tem mora biti geometrija in pritrditev zaslonskega elementa takšna, da je element dovolj tog, da se ne odziva na EM valovanje z nihanjem, ki bi se moteče z zvokom prenašalo v okolico. Togost je lahko dosežena z obliko, npr. pločevina z vtisi, perforirana pločevina, s primernim razmečem med glavnimi dimenzijami ploskve oz. ploskev in debelino pločevine.The display element is arranged between the electrical component that is the source of the EM wave and the structural element, especially if the distance to the electrical component is less than the distance to the structural element to capture as much of the EM wave as possible. The metal screen element may be attached to the electrical component that is the source of the EM wave. The geometry and attachment of the screen element must be such that the element is sufficiently rigid that it does not respond to EM wave oscillation that would disturb sound with noise. Stiffness can be achieved by form, e.g. impression plate, perforated sheet metal, with a suitable gap between the main dimensions of the surface or. surface and sheet thickness.
Pomembno je, daje zaslonski element takšne oblike in razporejen na način, da vsaj v eni smeri pretežno prepreči širjenje EM valovanja, to je v tisti, kjer bi širitev EM valovanja imela največji vpliv na sosednje konstrukcijske elemente, to je npr. v smeri od izvora do najbližje stene ohišja. V takšnem primeru je zaslon razporejen v eni ravnmi, ki leži med izvorom EM valovanja in najbližjo steno ohišja. Še bolj ugodno je, da je zaslon razporejen v večih ravninah, ki se sekajo ali so vzporedne med sabo tako, da se prepreči širitev EM valovanja v večih smereh od izvora, t.j. da v pretežni meri zaobjame vir EM valovanja. Še posebej ugodno se izkaže, če je zaslon izveden ploskovno, lahko v obliki zvezne plošče, plošče z odprtinami v obliki zarez, lukenj ali lamelasto zasnovane plošče ali v obliki mreže. Dodatna prednost zaslonskega elementa v obliki plošče z odprtinami je kroženje zraka, npr. za potrebe hlajenja električne komponente med delovanjem. Pri tem je poleg EM valovanja, zaradi geometrije, ki preusmerja in spreminja v toplotno in kinetično energijo valovanje molekul zraka, delno dušen tudi zvok, ki ga generira sama električna komponenta. Pritrditev zaslonskega elementa na električno komponento, ki povzroča EM valovanje, je izvedeno z uporabo znanih pritrdlnih elemetov, kot so zatiki, vijaki, kovice ipd.It is important that the screen element is shaped and arranged in such a way that it substantially prevents the propagation of the EM wave in at least one direction, that is, in the one where the propagation of the EM wave would have the greatest impact on adjacent structural elements, e.g. in the direction from the source to the nearest wall of the housing. In such a case, the screen is arranged in a single plane lying between the source of the EM wave and the closest wall of the housing. Even more advantageously, the screen is arranged in several planes that intersect or are parallel to each other so as to prevent the propagation of EM waves in several directions from the origin, i.e. to largely encircle the source of EM waves. It is especially advantageous if the screen is made in a planar fashion, it can be in the form of a continuous plate, a panel with openings in the form of notches, holes or lamellarly designed panel or in the form of a grid. An additional advantage of a screen element in the form of an aperture panel is the circulation of air, e.g. for the purpose of cooling the electrical component during operation. In addition to EM waves, due to the geometry, which redirects and converts to thermal and kinetic energy, the wave of air molecules also partially suppresses the sound generated by the electrical component itself. The attachment of the screen element to the electrical component that causes the EM wave is performed using known fasteners such as pins, screws, rivets, etc.
• · ···• · ···
V primeru, da je zaslonski element pritrjen na katerikoli konstrukcijski element znotraj gospodinjskega aparata, je pritrditev taka, da omogoča gibanje kovinskega zaslonskega elementa. Pri tem je še posebej ugodno, če so v pritrditvenih spojih razporejeni dušilni elementi za dušenje vibracij, npr. gumijasti deli, deli iz termoplastičnih elastomerov, tkanine ipd.If the display element is attached to any structural element within the household appliance, the attachment shall be such as to allow movement of the metal display element. This is especially advantageous if the damping elements are arranged in the mounting joints for damping vibrations, e.g. rubber parts, thermoplastic elastomer parts, fabrics, etc.
Zaradi običajnih zahtev po minimalnem razmiku med električno komponeneto, ki je generator povečanega EM valovanja, in konstrukcijskim elementom, kot je stena ohišja gospodinjskega aparata, je vpliv EM valovanja na steno ohišja močno povečan. Povečanje razmika med konstrukcijskeim elementom, to je steno ohišja gospodinjskega aparata, in virom EM valovanja, kar bi bistveno zmanjšalo vibracije, običajno ni mogoč ne da bi se pri tem zmanjšal uporabni prostor gospodinjskega aparata ali povečala zunanja dimenzija gospodinjskega aparata.Due to the usual requirements for a minimum distance between the electrical component, which is the generator of augmented EM wave, and a structural element such as the wall of the housing of a household appliance, the influence of the EM wave on the wall of the housing is greatly increased. Increasing the gap between the structural element, i.e. the wall of the household appliance housing, and the source of the EM wave, which would significantly reduce vibration, is usually not possible without reducing the usable space of the household appliance or increasing the external dimension of the household appliance.
Izum bo podrobneje opisan na osnovi izvedbenih primerov. Seveda lahko strokovnjak na osnovi poznavanja omenjenega izuma izvede aplikativne rešitve na drugih področjih, ne da bi presegel bistvo izuma.The invention will be described in more detail based on embodiments. Of course, the person skilled in the art can implement applied solutions in other fields without knowing the essence of the invention.
Gospodinjski aparat, ki je v primeru izvedbenega primera vgradna pečica, vsebuje ohišje, v katerem je razporejen pečniški prostor, ki je namenjen za toplotno obdelavo živil. Pečniški prostor je omejen z obodom ter vrati, ki zapirajo sprednjo odprtino pečniškega prostora. Med ohišjem in zadnjo steno oboda pečniškega prostora je razporejen elektromotor ventilatorja, kije na znan način razporejen v pečici. Na zadnji steni oboda pečniškega prostora je izvedena skoznja luknja, skozi katero v pečniški prostor sega gred elektromotorja ventilatorja, na katerem je pritrjena elisa ventilatorja. Le-ta je pokrita s pokrovom ventilatorja. Za hlajenje elektromotorja ventilatorja je na gredi neposredno ob, njem razporejen hladilni ventilator. Razmik med elektomotorjem ventilatorja oziroma njegovim ohišjem in zadnjo steno ohišja vgradne pečice je minimalen in ne presega zahtevanega minimalnega varnostnega razmika. Pri delovanju ventilatorja z namenom prisilne konvekcije zraka med • · ··· ··· ·· · ··· <The domestic appliance, which in the case of an embodiment is a built-in oven, comprises a housing housing an oven for heat treatment of foodstuffs. The oven area is limited by the perimeter and the door that closes the front opening of the oven space. Between the enclosure and the back wall of the perimeter of the oven is a fan electric motor, which is arranged in a known manner in the oven. On the back wall of the perimeter of the oven space is a through hole through which the shaft of the fan electric motor extends into the oven space, on which the fan tray is attached. It is covered by a fan cover. To cool the fan motor, a cooling fan is mounted on the shaft directly next to it. The distance between the fan motor or its housing and the back wall of the oven enclosure is minimal and does not exceed the required minimum safety clearance. When operating a fan for forced convection of air between • · · · · · · · · · · · ·
postopkom pečenja v omenjeni pečici se od elektromotoija ventilatorja, ki deluje na izmenično napetost, širi EM valovanje. Da ne bi prihajalo do nihanja oziroma vibriranja zadnje stene ohišja, kije iz feromagmnetnega materiala in dovzetna na EM valovanje, je po izumu med zadnjo steno ohišja in elektromotoijem ventilatorja razporejen zaslonski element. Zaslonski element je tvorjen kot plošča z odprtinami, ki so enake velikosti in enakomerno razporejene. Zaslonski ploščati element je po velikosti enak ali večji pravokotni projekciji zunanjih dimenzij elektromotorja ventilatorja na zadnjo steno ohišja gospodinjskega elementa. Zaslon je s pritrdilnim elementi v obliki vijakov neposredno pritrjen na ohišje elektromotorja ventilatorja.the baking process in the said oven expands the EM wave from the electromotor of the AC fan. In order not to cause oscillation or vibration of the back wall of the housing, which is made of ferromagnetic material and susceptible to EM wave, according to the invention, a screen element is arranged between the back wall of the housing and the electromoto of the fan. The display element is formed as a panel with openings that are the same size and evenly spaced. The screen element is equal in size or larger to the rectangular projection of the exterior dimensions of the fan electric motor onto the back wall of the housing of the household element. The screen is directly fastened to the fan motor housing by means of screw-type fasteners.
V drugem izvedbenem primeru je zaslonski element sestavni del sklopa elektromotorja. Ploščati zaslonski element v velikosti, ki je v bistvu enaka ali večja velikosti projekcije elektromotorja na zaslonski element, je pritrjen na sklop elektromotorja s pritrdilnimi elementi znane vrste. Tako v naprej pripravljen sestav elektromotorja in zaslonskega elementa se lahko vgradi v gospodinjski aparat ali v katerikoli drug aparat oziroma napravo, v kateri prihaja do problema vibracij zaradi EM valovanja vgrajenih električnih komponent.In another embodiment, the screen element is an integral part of the electric motor assembly. A flat screen element of a size substantially equal to or larger than the projection size of the electric motor on the screen element is attached to an electric motor assembly with fasteners of a known type. The pre-assembled electric motor and display element can be installed in a household appliance or in any other appliance or device in which there is a problem of vibration due to EM waves of the built-in electrical components.
Claims (14)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SI201600111A SI25187A (en) | 2016-04-20 | 2016-04-20 | A household appliance with electrical component of electromagnetic waves |
| PCT/IB2017/052198 WO2017182936A1 (en) | 2016-04-20 | 2017-04-18 | Household appliance with an electric component of electromagnetic radiation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| SI201600111A SI25187A (en) | 2016-04-20 | 2016-04-20 | A household appliance with electrical component of electromagnetic waves |
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| SI25187A true SI25187A (en) | 2017-10-30 |
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| SI201600111A SI25187A (en) | 2016-04-20 | 2016-04-20 | A household appliance with electrical component of electromagnetic waves |
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| WO (1) | WO2017182936A1 (en) |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0162645A1 (en) * | 1984-05-11 | 1985-11-27 | Masami Harada | Carbon-fiber-covered material |
| DE3643364A1 (en) * | 1986-12-18 | 1988-07-07 | Bosch Siemens Hausgeraete | LIGHTING DEVICE FOR A STOVE WITH MICROWAVE ENERGY, ESPECIALLY A HOUSEHOLD |
| JP2526820Y2 (en) * | 1991-05-24 | 1997-02-26 | 北川工業株式会社 | Knitted fabric for electromagnetic wave shielding |
| US6147336A (en) * | 1998-02-26 | 2000-11-14 | Japanese Research And Development Association For Application Of Electronic Technology In Food Industry | Induction heaters for heating food, fluids or the like |
| DE102009045542A1 (en) * | 2009-10-09 | 2011-04-14 | BSH Bosch und Siemens Hausgeräte GmbH | Household appliance has heat insulating housings and high frequency circuit, where recess is formed at outer side of housing |
| GB2479351B (en) * | 2010-04-06 | 2012-07-18 | Nanotesla Inst Ljubljana | Lossy cover for apertures through a shielding wall |
| DE102010064298A1 (en) * | 2010-12-29 | 2012-07-05 | Robert Bosch Gmbh | Device for supporting a shaft in a housing and unit with a device according to the invention |
| DE102013001339A1 (en) * | 2013-01-26 | 2014-07-31 | Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg | Rotating electrical machine |
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2016
- 2016-04-20 SI SI201600111A patent/SI25187A/en active IP Right Grant
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2017
- 2017-04-18 WO PCT/IB2017/052198 patent/WO2017182936A1/en active Application Filing
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| WO2017182936A1 (en) | 2017-10-26 |
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