1. Amanyathelo okhuseleko okusebenza kwe-welding
Xa kudityaniswa, umsebenzi kufuneka wenziwe ngokungqongqo ngokwemiqathango, kungenjalo umgangatho wokudityaniswa uya kuchaphazeleka.
(1) Umphezulu wezixhobo zepayipi eziza kudityaniswa kufuneka ucoceke okanye uvuthe. Umlomo ovuthelweyo kufuneka ube bushelelezi, ujikeleze, ungabi naziqwenga kunye nemingxunya, kwaye ufane ngobukhulu. Thambisa izihlanganisi zepayipi yobhedu eziza kudityaniswa ngephepha lesanti, uze ekugqibeleni uzisule ngelaphu elomileyo. Ngaphandle koko kuya kuchaphazela ukuhamba kwe-solder kunye nomgangatho we-soldering.
(2) Faka imibhobho yobhedu eza kudityaniswa idityaniswe (qaphela ubungakanani), kwaye ulungelelanise umbindi wesangqa.
(3) Xa kudityaniswa, iindawo ezidityanisiweyo kufuneka zifudunyezwe. Fudumeza inxalenye yokudityanisa yombhobho wobhedu ngelangatye, kwaye xa umbhobho wobhedu ufudunyezwa ube mfusa-bomvu, sebenzisa i-electrode yesilivere ukuyidityanisa. Emva kokuba ilangatye lisusiwe, i-solder ixhomekeke kwijoyinti ye-solder, ukuze i-solder inyibilike kwaye ingene kwiindawo zobhedu ezidityanisiweyo. Ubushushu emva kokufudumeza bunokubonakalisa ubushushu ngombala.
(4) Kungcono ukusebenzisa ilangatye elinamandla ukuwelda ngokukhawuleza, kwaye unciphise ixesha lokuwelda kangangoko kunokwenzeka ukuthintela ukuba ii-oxides ezininzi zingaveli kumbhobho. Ii-oxides ziya kubangela ukungcola kunye nokuvaleka kumphezulu wokuhamba kwefriji, kwaye zide zibangele umonakalo omkhulu kwi-compressor.
(5) Xa udibanisa i-solder, xa i-solder ingaqinanga ngokupheleleyo, ungaze uyishukumise okanye uyishukumise ipayipi yobhedu, kungenjalo inxalenye exutyiweyo iya kuba nemingxunya kwaye ibangele ukuvuza.
(6) Kwinkqubo yokukhenkcisa egcwele i-R12, akuvumelekanga ukutshixa ngaphandle kokukhupha amanzi kwifriji ye-R12, kwaye akunakwenzeka ukwenza ukulungiswa kokutshixa xa inkqubo yokukhenkcisa isavuza, ukuze kuthintelwe ukuba ifriji ye-R12 ibe yityhefu ngenxa yomlilo ovulekileyo. I-Phosgene inetyhefu emzimbeni womntu.
2. Indlela yokuwelda kwiindawo ezahlukeneyo
(1) Ukuwelda kwezixhobo zombhobho wesangqa sesigaba
Xa udibanisa imibhobho yobhedu enobubanzi obufanayo kwinkqubo yokufriji, sebenzisa i-casing welding. Oko kukuthi, umbhobho odibeneyo uyandiswa ube yindebe okanye umlomo wentsimbi, uze ufake omnye umbhobho. Ukuba ukufakwa kukufutshane kakhulu, akuyi kuchaphazela kuphela amandla kunye nokuqina, kodwa nokuhamba kuya kuhamba ngokulula kumbhobho, kubangele ungcoliseko okanye ukuvaleka; ukuba umsantsa phakathi kwemibhobho yangaphakathi neyangaphandle umncinci kakhulu, ukuhamba akunakuhamba kumphezulu womngxuma kwaye kunokuvaleka kuphela ngaphandle komphezulu. Amandla aphantsi kakhulu, kwaye aya kuqhekeka kwaye avuza xa ephantsi kwamandla okungcangcazela okanye okugoba; ukuba umsantsa ohambelanayo mkhulu kakhulu, ukuhamba kuya kuhamba ngokulula kumbhobho, kubangele ungcoliseko okanye ukuvaleka. Kwangaxeshanye, ukuvuza kuya kubangelwa kukungazaliswa ngokwaneleyo kokuhamba kwe-weld, kungekuphela nje umgangatho Akulunganga, kodwa kunye nokuchithwa kwezinto. Ke ngoko, kubaluleke kakhulu ukukhetha ubude bokufaka kunye nomsantsa phakathi kwemibhobho emibini ngokufanelekileyo.
(2) Ukuwelda kwetyhubhu ye-capillary kunye netyhubhu yobhedu
Xa kulungiswa isixhobo sokomisa isihluzo senkqubo yokukhenkcisa, ityhubhu ye-capillary (ityhubhu ye-throttle capillary) kufuneka idityaniswe. Xa i-capillary idityaniswe kwisixhobo sokomisa isihluzo okanye eminye imibhobho, ngenxa yomahluko omkhulu kwiidayamitha ezimbini zemibhobho, amandla obushushu e-capillary mancinci kakhulu, kwaye imeko yokushisa kakhulu ithambekele kakhulu ekonyuseni ingqolowa ye-metallographic ye-capillary, eba buthathaka kwaye kube lula ukuyiqhekeza. Ukuze kuthintelwe i-capillary ekutshiseni kakhulu, ilangabi lokuwelda ngegesi kufuneka liphephe i-capillary kwaye lenze lifikelele kubushushu bokuwelda ngaxeshanye netyhubhu etyebileyo. Ikliphu yesinyithi ingasetyenziselwa ukubopha iphepha lobhedu elityebileyo kwityhubhu ye-capillary ukwandisa indawo yokusasaza ubushushu ngokufanelekileyo ukuze kuthintelwe ukutshisa kakhulu.
(3) Ukuwelda kwetyhubhu ye-capillary kunye nesixhobo sokomisa isihluzi
Ubunzulu bokufakwa kwe-capillary kufuneka bulawulwe ngaphakathi kwe-5-15mm yokuqala, isiphelo sokufakwa kwe-capillary kunye nesomisi sesihluzo kufuneka sibe yi-5mm ukusuka esiphelweni sesikrini sesihluzo, kwaye umsantsa ohambelanayo kufuneka ube yi-0.06 ~ 0.15mm. Isiphelo se-capillary singcono senziwe sibe yi-engile ye-45° efana nesihlangu sehashe ukuthintela amasuntswana angaphandle ukuba ahlale kumphezulu wokugqibela aze abangele ukuvaleka.
Xa iidayamitha ezimbini zepayipi zahlukile kakhulu, isixhobo sokomisa isihluzi sinokutyunyuzwa nge-pipe clamp okanye i-vise ukuze sithambe umbhobho ongaphandle, kodwa i-capillary yangaphakathi ayinakucinezelwa (ifile). Oko kukuthi, faka i-capillary tube kwi-copper tube kuqala, uze uyicinezele nge-pipe clamp kumgama we-10 mm ukusuka esiphelweni se-thick tube.
(4) Ukuwelda kombhobho wefriji kunye nombhobho wecompressor
Ubunzulu bombhobho wefriji ofakwe kumbhobho kufuneka bube yi-10mm. Ukuba ungaphantsi kwe-10mm, umbhobho wefriji uya kuphuma ngokulula xa ufudumeza, nto leyo ebangela ukuba ulwelo luvale umlomo.
3. Ukuhlolwa komgangatho wokuwelda
Ukuqinisekisa ukuba akukho kuvuza kwaphela kwindawo edibeneyo, kufuneka kwenziwe uhlolo oluyimfuneko emva kokudityaniswa.
(1) Jonga ukuba ukusebenza kokuvala kwe-weld kulungile na. Emva kokongeza i-refrigerant okanye i-nitrogen ukuze izinze ixesha elithile, ingavavanywa ngamanzi anesepha okanye ezinye iindlela.
(2) Xa umsebenzi wokufaka efrijini nakwi-air-conditioner usebenza, akufuneki kubekho mifantu (imithungo) kwindawo yokuwelda ngenxa yokungcangcazela.
(3) Umbhobho akufuneki uvalwe ngenxa yokungena kwenkunkuma ngexesha lokudityaniswa, kwaye akufuneki ungene kumswakama ngenxa yokusebenza ngendlela engafanelekanga.
(4) Xa kufakwa ifriji kunye ne-air-conditioner, umphezulu wenxalenye yokuwelda kufuneka ucoceke kwaye ungabi namabala eoyile.
Ixesha lokuthumela: Okthobha-23-2021