[{"@context":"https:\/\/schema.org\/","@type":"Article","@id":"https:\/\/www.piatek.cz\/princip-vyhody-a-nevyhody-indukcniho-ohrevu\/#Article","mainEntityOfPage":"https:\/\/www.piatek.cz\/princip-vyhody-a-nevyhody-indukcniho-ohrevu\/","headline":"Princip, v\u00fdhody a nev\u00fdhody induk\u010dn\u00edho oh\u0159evu","name":"Princip, v\u00fdhody a nev\u00fdhody induk\u010dn\u00edho oh\u0159evu","description":"Induk\u010dn\u00ed elektrick\u00fd va\u0159i\u010d pracuje na principu c\u00edvky, do kter\u00e9 proud\u00ed st\u0159\u00eddav\u00fd elektrick\u00fd proud. C\u00edvka se nav\u00edj\u00ed z\u00a0m\u011bd\u011bn\u00e9ho dr\u00e1tu a uvnit\u0159 c\u00edvky vznik\u00e1 magnetick\u00e9 pole. Samotn\u00fd induk\u010dn\u00ed oh\u0159ev pak zp\u016fsobuj\u00ed tzv.…","datePublished":"2020-09-07","dateModified":"2023-05-05","author":{"@type":"Person","@id":"https:\/\/www.piatek.cz\/author\/#Person","name":"","url":"https:\/\/www.piatek.cz\/author\/","identifier":1,"image":{"@type":"ImageObject","@id":"https:\/\/secure.gravatar.com\/avatar\/ade5060b95d9432296fc92debd2ba3136f7a4d727a7bc57afe18c4808c7d7ac9?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/ade5060b95d9432296fc92debd2ba3136f7a4d727a7bc57afe18c4808c7d7ac9?s=96&d=mm&r=g","height":96,"width":96}},"publisher":{"@type":"Organization","name":"piatek.cz","logo":{"@type":"ImageObject","@id":"\/logo.png","url":"\/logo.png","width":600,"height":60}},"image":{"@type":"ImageObject","@id":"https:\/\/www.piatek.cz\/wp-content\/uploads\/img_a308244_w2442_t1519333800.jpg","url":"https:\/\/www.piatek.cz\/wp-content\/uploads\/img_a308244_w2442_t1519333800.jpg","height":0,"width":0},"url":"https:\/\/www.piatek.cz\/princip-vyhody-a-nevyhody-indukcniho-ohrevu\/","about":["Produkty"],"wordCount":626,"articleBody":"Induk\u010dn\u00ed elektrick\u00fd va\u0159i\u010d pracuje na principu c\u00edvky, do kter\u00e9 proud\u00ed st\u0159\u00eddav\u00fd elektrick\u00fd proud. C\u00edvka se nav\u00edj\u00ed z\u00a0m\u011bd\u011bn\u00e9ho dr\u00e1tu a uvnit\u0159 c\u00edvky vznik\u00e1 magnetick\u00e9 pole. Samotn\u00fd induk\u010dn\u00ed oh\u0159ev pak zp\u016fsobuj\u00ed tzv. v\u00ed\u0159iv\u00e9 proudy, kter\u00e9 se indukuj\u00ed uvnit\u0159 zah\u0159\u00edvan\u00e9 n\u00e1doby a d\u00edky elektrick\u00e9mu odporu se m\u011bn\u00ed na tepelnou energii. T\u00edmto zp\u016fsobem se vyrob\u00ed zhruba 90% tepla, zb\u00fdvaj\u00edc\u00edch 10% tvo\u0159\u00ed ztr\u00e1ty magnetizac\u00ed p\u0159i tzv. hysterezi feromagnetick\u00e9ho kovu, ze kter\u00e9ho je n\u00e1doba vyrobena. (Ide\u00e1ln\u00ed feromagnetick\u00fd kov je nap\u0159. slitina \u017eeleza a uhl\u00edku \u2013 rezav\u011bj\u00edc\u00ed ocel.) Pro praktick\u00e9 \u00fa\u010dely v dom\u00e1cnostech je nejvhodn\u011bj\u0161\u00ed n\u00e1dob\u00ed se sendvi\u010dov\u00fdm dnem (dno je z\u010d\u00e1sti nerezov\u00e9 a z\u010d\u00e1sti z\u00a0rezav\u011bj\u00edc\u00ed oceli).V\u00a0principu je ov\u0161em mo\u017en\u00e9 na induk\u010dn\u00edm va\u0159i\u010di pou\u017e\u00edvat i jin\u00e9 elektricky vodiv\u00e9 materi\u00e1ly, a to i nemagnetick\u00e9, co\u017e je ve\u0161ker\u00e9 hlin\u00edkov\u00e9 nebo m\u011bd\u011bn\u00e9 n\u00e1dob\u00ed, ale ocel m\u00e1 p\u0159ece jen vy\u0161\u0161\u00ed permeabilitu (zes\u00edlen\u00ed \u00fa\u010dink\u016f magnetick\u00e9ho pole).\u00a0 \u010c\u00edm vy\u0161\u0161\u00ed permeabilita, t\u00edm v\u011bt\u0161\u00ed hloubka pr\u016fniku magnetick\u00e9ho pole do dna n\u00e1dob na va\u0159i\u010di. Vznik\u00e1 p\u0159i tom tzv. skin efekt, kdy se n\u00e1doba zah\u0159\u00edv\u00e1 d\u00edky vysok\u00e9mu elektrick\u00e9mu odporu (u oceli a \u017eeleza je pochopiteln\u011b nejvy\u0161\u0161\u00ed). Proto nem\u016f\u017eete induk\u010dn\u00ed va\u0159i\u010d pou\u017e\u00edt pro elektricky nevodiv\u00e9 n\u00e1dob\u00ed z\u00a0keramiky a skla.Induk\u010dn\u00ed va\u0159i\u010d pracuje tedy na naprosto odli\u0161n\u00e9m principu, ne\u017e b\u011b\u017en\u00e9 elektrick\u00e9 plot\u00fdnkov\u00e9 va\u0159i\u010de nebo sklokeramick\u00e9 desky. A m\u00e1 odli\u0161n\u00e9 i fyzik\u00e1ln\u00ed vlastnosti. Je p\u0159edev\u0161\u00edm energeticky v\u00edce efektivn\u00ed, oh\u0159ev je rychlej\u0161\u00ed a d\u00e1 se plynule regulovat, podobn\u011b jako u plynov\u00fdch spor\u00e1k\u016f. V\u00fdhodou je tak\u00e9 to, \u017ee se zah\u0159\u00edv\u00e1 jen samotn\u00e1 n\u00e1doba, co\u017e v\u00fdznamn\u011b sn\u00ed\u017e\u00ed riziko pop\u00e1lenin, jak\u00e9 hroz\u00ed i klasick\u00e9ho plot\u00fdnkov\u00e9ho va\u0159i\u010de.\u00a0 Oh\u0159ev je rovnom\u011brn\u00fd, l\u00e9pe se vede teplo a pr\u016fb\u011bh va\u0159en\u00ed je dob\u0159e pod kontrolou.Rychlost oh\u0159evu je opravdu v\u00fdznamn\u00e1, induk\u010dn\u00ed va\u0159i\u010d o v\u00fdkonu 3,6 kW oh\u0159eje vodu do bodu varu v\u00a0hrnci za 3 minuty, zat\u00edmco u stejn\u00e9ho hrnce na plot\u00fdnkov\u00e9m va\u0159i\u010di o v\u00fdkonu 1200 Watt\u016f ji oh\u0159ejete za 10 minut. V\u00fdraznou zm\u011bnu v\u00a0rychlosti zaznamen\u00e1te p\u0159i sma\u017een\u00ed, olej se na tenk\u00e9 p\u00e1nvi rozeh\u0159eje na pot\u0159ebnou teplotu ji\u017e za 10 sekund. Induk\u010dn\u00ed va\u0159i\u010de se tak\u00e9 v\u00fdborn\u011b udr\u017euj\u00ed v\u00a0\u010distot\u011b a j\u00eddlo se na povrchu va\u0159i\u010de nep\u0159ipaluje, proto\u017ee jeho povrch je v\u00a0podstat\u011b studen\u00fd.\tNev\u00fdhody a \u00faskal\u00ed induk\u010dn\u00edho va\u0159en\u00edZ\u00e1sadn\u00ed nev\u00fdhodou je pou\u017eit\u00ed speci\u00e1ln\u00edho n\u00e1dob\u00ed, kter\u00e9 by m\u011blo m\u00edt sendvi\u010dov\u00e9 dno ze dvou vrstev oceli (vn\u011bj\u0161\u00ed je nerezov\u00e1 a vnit\u0159n\u00ed je z\u00a0rezav\u011bj\u00edc\u00ed ferromagnetick\u00e9 oceli). Nem\u016f\u017eete pou\u017e\u00edvat keramiku a sklo a t\u00e9m\u011b\u0159 v\u016fbec tak\u00e9 hlin\u00edkov\u00e9 a m\u011bd\u011bn\u00e9 n\u00e1doby. Probl\u00e9m b\u00fdv\u00e1 i u oby\u010dejn\u00fdch nerezov\u00fdch hrnc\u016f.Induk\u010dn\u00ed va\u0159i\u010de jsou pom\u011brn\u011b hlu\u010dn\u00e9, co\u017e je zp\u016fsobeno chladic\u00edmi ventil\u00e1tory a rezonanc\u00ed c\u00edvek. P\u0159i jejich pou\u017e\u00edv\u00e1n\u00ed se mohou zah\u0159\u00edvat prsteny a n\u00e1ramky na rukou a velk\u00e9 riziko p\u0159edstavuj\u00ed pro lidi s\u00a0kardiostimul\u00e1tory a pro lidi citliv\u00e9 na vysokofrekven\u010dn\u00ed magnetick\u00e9 pole. Induk\u010dn\u00ed c\u00edvky maj\u00ed tak\u00e9 neblah\u00fd vliv na dom\u00e1c\u00ed elektroniku.                                                                                                                                                                                                                                                                                                                                                                                        4.2\/5 - (9 votes)        "},{"@context":"https:\/\/schema.org\/","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Princip, v\u00fdhody a nev\u00fdhody induk\u010dn\u00edho oh\u0159evu","item":"https:\/\/www.piatek.cz\/princip-vyhody-a-nevyhody-indukcniho-ohrevu\/#breadcrumbitem"}]}]