1.Precautions pa ntchito kuwotcherera
Pamene kuwotcherera, ntchitoyo iyenera kuchitidwa motsatira ndondomeko, apo ayi, ubwino wa kuwotcherera udzakhudzidwa.
(1) Pamwamba pazitsulo za chitoliro zomwe ziyenera kuwotcherera ziyenera kukhala zoyera kapena zoyaka.Pakamwa pamoto uyenera kukhala wosalala, wozungulira, wopanda ma burrs ndi ming'alu, ndi mawonekedwe ofanana mu makulidwe.Pulitsani zitoliro za mkuwa kuti ziwotchedwe ndi sandpaper, ndipo potsiriza zipukutani ndi nsalu youma.Apo ayi, zidzakhudza kuyenda kwa solder ndi khalidwe la soldering.
(2) Ikani mipope yamkuwa kuti azipiringizidwa modutsana wina ndi mzake (samalani ndi kukula), ndi kugwirizanitsa pakati pa bwalo.
(3) Powotcherera, mbali zowotcherera ziyenera kutenthedwa.Kutenthetsa mbali yowotcherera ya chitoliro chamkuwa ndi lawi lamoto, ndipo chitoliro chamkuwa chikatenthedwa kukhala wofiirira, gwiritsani ntchito electrode yasiliva kuti muwotcherera.Lawi lamoto litachotsedwa, solder imatsamira pamgwirizano wa solder, kotero kuti solder imasungunuka ndikulowa m'zigawo zamkuwa zomwe zagulitsidwa.Kutentha pambuyo pakutentha kumatha kuwonetsa kutentha kudzera mumtundu.
(4) Ndi bwino kugwiritsa ntchito lawi lamphamvu powotchera mwachangu, ndikufupikitsa nthawi yowotcherera momwe mungathere kuti ma oxide achuluke asatulutsidwe mupaipi.Ma okosijeni amayambitsa litsiro ndi kutsekeka motsatira njira ya firiji, komanso kuwononga kwambiri kompresa.
(5) Pamene soldering, pamene solder si olimba kwathunthu, musagwedeze kapena kugwedeza chitoliro chamkuwa, mwinamwake gawo logulitsidwa lidzakhala ndi ming'alu ndikuyambitsa kutayikira.
(6) Kwa firiji yodzaza ndi R12, sikuloledwa kuwotcherera popanda kukhetsa refrigerant ya R12, ndipo sikutheka kukonza zowotcherera pamene firiji ikadali ikutha, kuteteza refrigerant ya R12 kukhala poizoni. chifukwa cha moto wotseguka.Phosgene ndi poizoni m'thupi la munthu.
2. Njira yowotcherera mbali zosiyanasiyana
(1) kuwotcherera gawo m'mimba mwake zovekera chitoliro
Pamene kuwotcherera mipope mkuwa ndi awiri ofanana mu firiji dongosolo, ntchito casing kuwotcherera.Ndiko kuti, chitoliro chowotcherera chimakulitsidwa mu kapu kapena belu pakamwa, ndiyeno chitoliro china chimayikidwa.Ngati kulowetsako kuli kochepa kwambiri, sikudzangokhudza mphamvu ndi zomangira, komanso kutsekemera kumathamanga mosavuta mu chitoliro, kumayambitsa kuipitsidwa kapena kutsekedwa;ngati kusiyana pakati pa mapaipi amkati ndi akunja ndi ochepa kwambiri, kutulutsako sikungathe kulowa m'malo osungiramo zinthu ndipo kungathe kuwotcherera kunja kwa mawonekedwe.Mphamvuyo ndi yochepa kwambiri, ndipo imasweka ndi kutayikira ikagwidwa ndi kugwedezeka kapena kupindika;ngati kusiyana kofananirako kuli kwakukulu kwambiri, kutulutsako kumathamanga mosavuta mu chitoliro, kuchititsa kuipitsa kapena kutsekeka.Panthawi imodzimodziyo, kutayikira kudzayambitsidwa ndi kusakwanira kwa flux kudzaza mu weld, osati kokha khalidwe Osati labwino, komanso kuwononga zipangizo.Choncho, ndikofunika kwambiri kusankha kutalika kwa kuyika ndi kusiyana pakati pa mapaipi awiri moyenerera.
(2) Kuwotcherera kwa chubu cha capillary ndi chubu chamkuwa
Pokonza chowumitsira chowumitsira mufiriji, chubu cha capillary (throttle capillary chubu) chiyenera kuwotcherera.Pamene capillary ndi welded kwa fyuluta zowumitsira kapena mipope ena, chifukwa chachikulu kusiyana awiri chitoliro diameters, kutentha mphamvu ya capillary ndi laling'ono kwambiri, ndi chodabwitsa cha kutenthedwa ndi sachedwa kwambiri kuonjezera metallographic njere wa capillary. , yomwe imakhala yolimba komanso yosavuta kusweka.Pofuna kuteteza capillary kuti isatenthedwe, moto wowotchera mpweya uyenera kupeŵa capillary ndikupangitsa kuti ifike kutentha kutentha nthawi yomweyo ngati chubu wandiweyani.Chidutswa chachitsulo chitha kugwiritsidwanso ntchito kumangirira pepala lamkuwa wokhuthala pachubu la capillary kuti muwonjezere malo otenthetsera kutentha moyenera kuti asatenthedwe.
(3) kuwotcherera kwa capillary chubu ndi zowumitsa zosefera
Kuzama kwa capillary kuyenera kuyendetsedwa mkati mwa 5-15mm yoyamba, kumapeto kwa capillary ndi chowumitsira fyuluta kuyenera kukhala 5mm kuchokera kumapeto kwa sefa, ndipo kusiyana kofananira kuyenera kukhala 0.06 ~ 0.15mm.Mapeto a capillary amapangidwa bwino kukhala ngodya yofanana ndi 45 ° kuti tinthu tating'ono ting'onoting'ono tisakhale pamtunda ndikuyambitsa kutsekeka.
Pamene ma diameter awiri a chitoliro ali osiyana kwambiri, chowumitsira fyuluta chingathenso kuphwanyidwa ndi chitoliro chachitsulo kapena chitoliro kuti chiphwanyike chitoliro chakunja, koma capillary yamkati sichitha kukanikizidwa (yakufa).Ndiko kuti, ikani chubu cha capillary mu chubu chamkuwa choyamba, ndikuchifinya ndi chitoliro chomwe chili pamtunda wa 10 mm kuchokera kumapeto kwa chubu chakuda.
(4) Kuwotchera kwa chitoliro cha refrigerant ndi kompresa
Kuya kwa chitoliro cha refrigerant choyikidwa mu chitoliro kuyenera kukhala 10mm.Ngati ili yosakwana 10mm, chitoliro cha refrigerant chimasunthira kunja pang'onopang'ono panthawi yotentha, zomwe zimapangitsa kuti phokosolo litseke.
3. Kuyang'ana kwa kuwotcherera khalidwe
Pofuna kuonetsetsa kuti palibe kutayikira pa welded mbali, kuyendera koyenera kuyenera kuchitika pambuyo kuwotcherera.
(1) Onani ngati kusindikiza kwa weld kuli bwino.Mukawonjezera firiji kapena nayitrogeni kuti akhazikike kwa nthawi inayake, imatha kuyesedwa ndi madzi a sopo kapena njira zina.
(2) Pamene firiji ndi air-conditioning ntchito ntchito, palibe ming'alu (seams) mu malo kuwotcherera chifukwa kugwedera ayenera kuloledwa.
(3)Paipiyo isatsekedwe chifukwa cha zinyalala zomwe zimalowa mkati mwa kuwotcherera, komanso zisalowe m'chinyezi chifukwa cha ntchito yolakwika.
(4) Pamene firiji ndi mpweya ntchito ntchito, pamwamba pa kuwotcherera mbali ayenera kukhala woyera ndi opanda banga mafuta.
Nthawi yotumiza: Oct-23-2021