PTC: Kodi Yang'anani Kutukula?

Mu kwambiri CRT ma TV ntchito dongosolo degaussing, amene Integrated PTC. Kodi kuonanso dera vuto la kulephera nokha, muyenera kudziwa, pofuna kuchita kukonza eni zawo. Amafotokozera ali thupi katundu amene angaletse ndi ohmmeter mwachizolowezi.

katundu amafotokozera

Iwo ayenera kuphunzira zimene PTC, kodi kuyesa mu unyolo - idzawonetsedwa ina. amafotokozera izi chingathe kusintha katundu malinga kutentha. kuchuluka thupi anayeza kukana. Pa chipinda mfundo kutentha ohmmeter amasonyeza mayunitsi kapena makumi ohms.

Pamene usavutike, kulimbikira mu phwando akuyamba kusintha. Makhalidwe ohmmeter kale kusonyeza mazana a mapaundi, nanena kuti mkhalidwe weniweni umene amafotokozera ndi - ndi zosalongosoka PTC. Kodi kufufuza ngati pali kukayikitsa dera wolakwika? Njira yothetsera vutoli chili m'munsimu.

Chifukwa katundu PTC thermistors ankagwiritsa ntchito microelectronics zolinga zosiyanasiyana:

• Mphamvu chitetezo dera. Ndi kuchuluka mowa panopa heats amafotokozera ndi kukana ukuwonjezeka ndi pazipita, pamene pali panopa cutoff.
• The Kutentha madera. Chifukwa cha PTC thermistor akuyendera basi dongosolo Kutentha kulamulira.
• M'madera masensa kutentha.

Lamkati membala chipangizo

Resistor amasintha kukana ake kutentha, komanso PTC. Kodi kufufuza chinthu choyamba? Ndi yosavuta imeneyi. Resistor mfundo kwanthawi mkati osiyanasiyana yaing'ono. PTC thermistor amatha ndigwire kwathunthu m'kupita panopa kudzera monga temistor. Only otsiriza ali pa ubwenzi osiyanitsidwa ndi kutentha.

Kudziwa momwe fufuzani Kutukula wa PTC thermistor, muyenera chimatanthauza ntchito yake yaikulu. Njirazi ndi monga:

• Mwadzina kukana pa yozungulira kutentha (kawirikawiri ndi madigiri 20-25);
• kusintha kulimbikira anatsimikiza pa nsonga ya makhalidwe kukaniza kudalira kutentha, pamene chizindikiro choyamba chinawonjezeka ndi nthawi 2 poyerekeza ndi phindu mwadzina;
• ndi voteji pazipita chimene chingathe kupirira chinthu popanda kulephera;
• panopa katundu makhalidwe: mwadzina kusinthitsa, pazipita zotheka ndi kugubuduza; kukayendera magawo ali ofunika ngati PTC thermistor ntchito mu madera mkulu-mwatsatanetsatane.

Amafotokozera mu dera la demagnetization

Kodi kufufuza PTC pa TV? Yankho la funso motere mfundo ya ntchito zake. The vuto mchitidwe chithunzi kupotoza akuwonetseredwa ndi magnetization. Kuthetsa izi chilema kapangidwe gululi zowonetsera ntchito mu nkhani ndi PTC thermistor. Mapulani amatchedwa kuzungulira akunja, kuphimba pamwamba lonse yotchinga kuchokera mkati.

PTC kawirikawiri losindikizidwa mu chigoba dera chophimba chimene complicates ake pamalo anayendera. Pamaso pa miyeso ayenera losindikizidwa-kuchokera kumapeto mmodzi wa gululi lapansi. Njira adzakhala m'zigawo kwathunthu ku dera la.

Ntchito yachibadwa pa Kutentha mchitidwe kapena msonkhano zipinda. Kuti muone popanda magetsi kunja chofunika kusonkhana dera chithunzi ndi kudziwa mtundu chodetsa PTC. Otuluka chipangizo nameplate deta akonzedwa ulendo mchitidwe panopa ndi kutentha kake.

Kutukula thermistor akhoza amangosankha anasonyeza pamene nkhonya magetsi. Ngati kukana kumawonjezera, ndiye woyenera amafotokozera. Komabe, mu chimake izi patsalanso Mwina zotsatira olakwika mayeso. Chifukwa kukana zinthu dera zimasiyanasiyana msinkhu, zikubweretsa Kusakhazikika ntchito msonkhano.

N'chifukwa chiyani tiyenera kachitidwe CRT?

Pa TV popanda degaussing dongosolo chithunzi kuti molakwika ndi chikoka pang'ono m'munda mu atomu. Izo limatulutsa zipangizo zonse, dziko lapansili ndi litadzala ndi mafunde wosaoneka.

Popeza amplifiers, okamba lalikulu, zinthu Kutentha nthawi zambiri ili pafupi ndi TV. Popanda chophimba ndi chigoba chithunzi akanati kalekale molakwika. Mu ntchito koyamba umayenda mwa PTC thermistor yaing'ono panopa osati kuchititsa Kutentha izo. Pamene chigoba izi thupi akupanikizika akuwuka kuchokera kumunda.

Ndi ntchito maginito ndipo anachotsa maginito chigoba nthawi kusintha pa TV. Nthawi zambiri izi limodzi ndi phokoso yofanana ndi nkhonya pa lolira lapansi. Ikuluikulu kukula chophimba, ndi apamwamba mamvekedwe a phokoso. PTC thermistor pa mfundo iyi umadutsa mkulu-matalikidwe panopa, moti kutenthetsa. Chulukitsani kukana amapezeka ndi maloko dera amafotokozera.

Mungasankhe vuto machubu chithunzi

Pamene woyamba anatembenukira kapena fano ndi oipa ndi nambwibwi anati zomangirazo, ndiye mkulu Mwina wolakwa posistor. Kodi kufufuza zinthu multimeter mu unyolo? Pa dera ozizira kosavuta kuchita, chifukwa thermistor kukana yochepa.

Nthawi zambiri ojambula soldering chabe kuguluka ntchito nthawi yaitali. PTC amatanthauza zinthu za chiwembu, amene nthawi zonse ntchito mu mkhalidwe mkangano. An chophimba chigoba kugwirizana ohmmeter cheke ndi osachiritsika wachiwiri wa miyendo thermistor. Ngati ndi osachepera, izo zikusonyeza kuti pali kugwirizana otetezeka. Mwina chinthu sachiza pa odulidwa kwambiri.

Ngati PTC thermistor zolakwika ndi yochepa circuited, nthawi yoyamba kuyatsa lama fuyusi ndi osapsa ndi magetsi. Malinga kumachitika popanda akuoneka dera yochepa unyolo, aletse vuto akhoza kwathunthu disabling chophimba chigoba ndi PTC.

Amafotokozera mu coolers unyolo

Ngati si usavutike kumbuyo kwa yozizira - rediyeta, ndiye kudziletsa kukonza muyenera kukhala bwino mmene kutsimikizira PTC. The firiji angagwiritsidwe ntchito mitundu 2 actuators: a PTC thermistors ndi yolandirana mu atomu. Gawo loyamba la mphamvu imene kutenthetsa kutayika amafotokozera kukana, wachiwiri zochepa odalirika, koma osati mkangano.

Ambiri PTC mu refrigerators ayenera kulimbikira za 20-30 ohms. M'chigawo mkangano kungakhale kilohms angapo. Ngati mfundo ndi apamwamba kwambiri kuposa asonyeza, ndiye chinthu ayenera m'malo. Nkofunika kupereka thermistor kwa kuziziritsa kwa firiji isanachitike kayesedwe.