1.Precautions pa ntchito kuwotcherera
Pamene kuwotcherera, ntchitoyo iyenera kuchitidwa motsatira ndondomeko, apo ayi, ubwino wa kuwotcherera udzakhudzidwa.
(1) Pamwamba pa zida zowotcherera zitoliro ziyenera kukhala zoyera kapena zoyaka. Pakamwa pamoto uyenera kukhala wosalala, wozungulira, wopanda ma burrs ndi ming'alu, komanso mawonekedwe ofanana. 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) Lowetsani mapaipi amkuwa kuti aziwotcherera podutsana wina ndi mzake (samalani ndi kukula kwake), ndikugwirizanitsa pakati pa bwalo.
(3) Powotcherera, mbali zowotcherera ziyenera kutenthedwa. Kutenthetsa mbali yowotcherera ya chitoliro chamkuwa ndi lawi lamoto, ndipo chitoliro chamkuwa chikatenthedwa kukhala chibakuwa chofiira, gwiritsani ntchito electrode ya siliva kuti muwotche. 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) Ndikwabwino kugwiritsa ntchito lawi lamphamvu powotcherera 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 yodzazidwa ndi R12, sikuloledwa kuwotcherera popanda kukhetsa refrigerant ya R12, ndipo sikutheka kukonza zowotcherera pamene firiji ikadali ikutha, pofuna 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 kutsekeka; ngati kusiyana pakati pa mipope yamkati ndi yakunja ndi yaying'ono 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 kugwedezeka; ngati kusiyana kofananirako kuli kwakukulu kwambiri, kutulutsako kumayenda mosavuta mu chitoliro, kumayambitsa 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 yaing'ono kwambiri, ndi chodabwitsa cha kutenthedwa ndi sachedwa kwambiri kuonjezera metallographic njere wa capillary, amene amakhala Chimaona ndi yosavuta kuswa. Pofuna kuteteza capillary kuti isatenthedwe, moto wowotcherera mpweya uyenera kupeŵa capillary ndikupangitsa kuti ifike kutentha kutentha nthawi yomweyo ngati chubu wandiweyani. Chojambula chachitsulo chitha kugwiritsidwanso ntchito kukakamiza 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 kuwongoleredwa mkati mwa 5-15mm yoyamba, kumapeto kwa capillary ndi chowumitsira zosefera kuyenera kukhala 5mm kuchokera kumapeto kwa sefa, ndipo kusiyana kofananirako 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 vise kuti chiphwanyike chitoliro chakunja, koma capillary yamkati sungakanidwe (yakufa). Ndiko kuti, ikani chubu cha capillary mu chubu chamkuwa choyamba, ndikuchifinya ndi chitoliro cholimba pamtunda wa 10 mm kuchokera kumapeto kwa chubu chakuda.
(4) Kuwotchera kwa chitoliro cha refrigerant ndi kompresa
Kuzama 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. Pambuyo powonjezera refrigerant kapena nitrogen kuti akhazikike kwa nthawi inayake, imatha kuyesedwa ndi madzi a sopo kapena njira zina.
(2) Pamene ntchito ya refrigerating ndi air-conditioning ikugwira ntchito, palibe ming'alu (seams) mu malo owotcherera chifukwa cha kugwedezeka kuyenera kuloledwa.
(3)Paipiyo sayenera kutsekedwa 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