Choyamba, kusanthula kulephera ndi chithandizo cha kutentha kwa malo ozizira sikutsika
Kutentha kwa firiji ndi kwakukulu kwambiri. Pambuyo poyang'anitsitsa, kutentha kwa nyumba ziwiri zosungiramo zinthu kunali -4°C mpaka 0°C yokha, ndipo ma valve amadzimadzi a solenoid a nyumba ziwiri zosungiramo zinthu anatsegulidwa. Compressor inayamba pafupipafupi, koma zinthu sizinasinthe pamene inasintha kupita ku compressor ina, koma panali chisanu chochuluka pa chitoliro chobwerera. Pambuyo polowa m'nyumba ziwiri zosungiramo zinthu, zinapezeka kuti chisanu chochuluka chinapangidwa pa ma coil otulutsa nthunzi, ndipo zinthu zinasintha pambuyo posungunuka. Panthawiyi, nthawi yoyambira ndi kutentha kosungirako kwa compressor kumachepa, koma sikoyenera. Kenako yang'anani malire apamwamba ndi otsika a zochita zowongolera zotsika, ndipo munapeza kuti kusasintha bwino ndi 0.11-0.15npa, ndiko kuti, siyani compressor pamene kuthamanga kuli 0.11mpa, ndikuyambitsa compressor pamene kuthamanga kuli 0.15pa. Kutentha kofanana ndi kusungunuka ndi pafupifupi -20°C mpaka 18°C. Mwachiwonekere, izi ndizokwera kwambiri ndipo kusiyana kwa amplitude ndi kochepa kwambiri. Choncho, sinthani malire apamwamba ndi otsika a chowongolera cha kuthamanga kwa mpweya wotsika. Mtengo wosinthidwa ndi 0.05-0.12mpa, ndipo kutentha kofanana ndi kutsika kwa mpweya ndi pafupifupi -20°C-18°C. Pambuyo pake, yambaninso makinawo ndikuyambiranso kugwira ntchito mwachizolowezi.
2. Zifukwa zingapo zomwe zimayambitsira ma compressor oziziritsa nthawi zambiri
Ma compressor oyendetsera ntchito amayatsidwa ndikuyimitsidwa ndi ma relay amphamvu komanso otsika, koma pambuyo poti ma relay ambiri amphamvu agwa, kuyambiranso kuyenera kuchitika pamanja kuti compressor iyambirenso. Chifukwa chake, kuyambika ndi kuyimitsa pafupipafupi kwa compressor nthawi zambiri sikumachitika chifukwa cha relay yamphamvu, koma makamaka chifukwa cha relay yamphamvu:
1. Kusiyana kwa kutentha pakati pa matalikidwe a relay ndi relay yamagetsi otsika ndi kochepa kwambiri, kapena kusiyana kwa kutentha pakati pa matalikidwe a relay ndi relay yamagetsi otsika ndi kochepa kwambiri;
2. Valavu yoyamwa ndi kutulutsa mpweya kapena valavu yotetezera ya compressor imatuluka, kotero ikatsekedwa, mpweya wopanikizika kwambiri umatuluka mu dongosolo lopanikizika pang'ono, ndipo kuthamanga kudzakwera mofulumira kuti compressor iyambitse. Pambuyo poyambitsa, kuthamanga kwa dongosolo lotsika mphamvu kumatsika mofulumira, relay yotsika mphamvu imagwira ntchito, ndipo compressor imasiya;
3. Valavu yobwezeretsa mafuta yokha ya cholekanitsa mafuta chodzola imatuluka;
4. Cholumikizira ayezi cha valavu yokulitsa.
3. Chokometsera chimagwira ntchito kwa nthawi yayitali
Chifukwa chachikulu cha nthawi yayitali ya compressor ndi kusakwanira kwa mphamvu yoziziritsira ya chipangizocho kapena kutentha kwambiri kwa malo osungiramo zinthu zozizira, makamaka kuphatikiza:
1. Chotenthetsera madzi chimakhala ndi chisanu chochuluka kapena mafuta ambiri osungidwa;
2. Kuyenda kwa refrigerant m'dongosolo sikukwanira, kapena payipi yamadzimadzi ya refrigerant si yosalala mokwanira;
3. Chifukwa cha kutuluka kwa ma valve plates a intake ndi exhaust, kutuluka kwakukulu kwa piston ring kapena kulephera kwa compressor kuwonjezera katundu, mpweya weniweni wa compressor umachepa kwambiri;
4. Chitsulo choteteza kutentha cha malo osungiramo zinthu ozizira chawonongeka, chitseko sichinatsekedwe bwino kapena zinthu zambiri zotentha zimatulutsidwa, zomwe zimapangitsa kuti malo osungiramo zinthu ozizira akhale ndi kutentha kwambiri;
5. Cholumikizira kutentha, cholumikizira chamagetsi otsika kapena valavu ya solenoid yamadzimadzi ndi zida zina zowongolera zili ndi vuto, zomwe zimapangitsa kutentha kosungirako kufika pamlingo wotsika. Koma cholumikizira sichingathe kuyima pakapita nthawi.
4. Compressor ikasiya kugwira ntchito, mphamvu zapamwamba ndi zochepa zimakhala bwino kwambiri
Izi zimachitika makamaka chifukwa cha kutuluka kapena kusweka kwakukulu kwa mbale zokoka ndi zotulutsira utsi, kusweka kwa gasket pakati pa kuthamanga kwambiri ndi kuthamanga kochepa kwa silinda, komanso kulowa mwachangu kwa mpweya wothamanga kwambiri m'chipinda chokoka utatha kuzimitsidwa.
5. Chokometsera sichingathe kukwezedwa kapena kutulutsidwa mwachizolowezi
Pa dongosolo lolamulira mphamvu lomwe limayendetsedwa ndi kuthamanga kwa mafuta, chifukwa chachikulu ndichakuti: kuthamanga kwa mafuta opaka kumakhala kotsika kwambiri. (Nthawi zambiri kumachitika chifukwa cha kutuluka kwa ma bearing ndi kutuluka kwa pampu), kumatha kuthetsedwa pomangirira valavu yowongolera kuthamanga kwa mafuta; pistoni yotsitsa mafuta imataya mafuta kwambiri, ndipo dera la mafuta limatsekedwa; silinda yamafuta imamatira pa pistoni kapena makina ena; valavu ya solenoid sigwira ntchito bwino, Kapena pakati pa chitsulo pali maginito otsalira.
6. Kulephera kwa dongosolo la firiji
1. Kuzizira pa evaporator coil: kuzizira pa evaporator coil sikuyenera kupitirira 3mm. Ngati frosting ndi yokhuthala kwambiri, kukana kutentha kudzawonjezeka, zomwe zimapangitsa kuti kutentha kukhale kosiyana pakati pa evaporator ndi malo osungira ozizira. Refrigerant singathe kuyamwa kutentha kokwanira kuti isungunuke mu evaporator. Kuchuluka kwa refrigerant kumayamwa kutentha pa return payipi ndikusungunuka, zomwe zimawonjezera frosting ya return payipi; kuphatikiza apo, superheat yomwe imamvedwa ndi expansion valve ndi yaying'ono kwambiri kapena zero, zomwe zimapangitsa kuti itseke kapena kutseka, ndipo compressor idzasiya kuthamanga pang'ono posachedwa. Komabe, solenoid valve siitsekedwa, ndipo pamakhalabe kutentha kwina mu cold storage. Evaporator pressure ikakwera, compressor imayambanso, zomwe zimayambitsa kuyamba pafupipafupi. Frosting pa evaporator ikakula, vutoli lidzakhala loipa kwambiri. Ndipotu, chisanu pa ma coil a evaporator a malo awiri ozizira otsika kutentha mu dongosololi ndi chokhuthala kwambiri, kufika 1-2cm, zomwe zimakhudza kwambiri kusamutsa kutentha ndipo sizingachepetse kutentha kosungirako. Mukasungunula, yambitsaninso dongosololi, ndipo kutentha kwa malo awiri osungiramo zinthu otentha otsika kumatha kutsika kufika pa 6-5°C.
2. Mtengo wokhazikitsa wa chowongolera cha kuthamanga kwapamwamba ndi kotsika siwolondola: chosungira chomwe chimagwiritsidwa ntchito mu zida zoziziritsira ndi R22, ndipo kuthamanga kwamphamvu kwamagetsi (malire apamwamba) kumasankhidwa kwambiri ngati kuthamanga kwa gauge ya 1.7-1.9mpa. Kupanikizika (malire otsika) kwa relay yamagetsi otsika kungakhale kuthamanga kwa kuzizira kwa refrigerant kofanana ndi kutentha kwa evaporation kwa kapangidwe -5°C (kusiyana kwa kutentha kwa kutentha), koma nthawi zambiri sikutsika kuposa kuthamanga kwa gauge ya 0.01 MPa. Kusiyana kwa kusintha kwa switch yamagetsi otsika nthawi zambiri kumakhala 0.1-0.2MPa. Nthawi zina sikelo ya mtengo wokhazikitsa kuthamanga kwa kuthamanga sikolondola, ndipo mtengo weniweni umadalira mtengo womwe umayesedwa panthawi yokonza zolakwika. Mukayesa chowongolera cha kuthamanga kwapansi, tsekani pang'onopang'ono valavu yotseka yokakamiza ya compressor, ndipo samalani ndi mtengo wosonyeza wa gauge ya kuthamanga kwa suction. Mitengo yosonyeza pamene compressor yayimitsidwa ndikuyambiranso ndi malire apamwamba ndi otsika a chowongolera cha kuthamanga kwapansi. Kuti muyese chowongolera cha kuthamanga kwa magazi, tsekani pang'onopang'ono valavu yoyimitsa kutulutsa kwa compressor, ndikuwerenga kuwerenga kwa gauge yoyezera kuthamanga kwa magazi pamene compressor yaima, ndiko kuti, kuthamanga kwa kuthamanga kwa magazi. Tsimikizani kudalirika kwa gauge yoyezera kuthamanga kwa magazi musanayese; kuti muwonetsetse kuti valavu yoyezera kuthamanga kwa magazi siyenera kutsekedwa kwathunthu.
3. Chosungira madzi chosakwanira mu dongosolo: Mu chipangizo chokhala ndi thanki yosungira madzi, chifukwa cha ntchito yosinthira thanki yosungira madzi, pokhapokha ngati pali kusowa kwakukulu kwa chosungira madzi, madzi omwe amaperekedwa ndi thanki yosungira madzi sangathe kukhala opitilira, zomwe zidzakhudza magwiridwe antchito abwinobwino a chipangizocho. "Chosungira madzi chochepa", mwachitsanzo kuchuluka kwa madzi ochepa, sikudzakhudza kwambiri magwiridwe antchito a dongosolo. Komabe, mu chipangizo chopanda thanki yosungira madzi, popeza kuchuluka kwa chosungira madzi mu dongosolo kumatsimikiza mwachindunji kuchuluka kwa madzi mu chosungira madzi, motero kumakhudza magwiridwe antchito a chosungira madzi ndi kuchuluka kwa kuzizira kwa chosungira madzi, pamene kuchuluka kwa chosungira madzi mu dongosolo Ngati sichikwanira, mosakayikira chidzatsogolera ku kusintha kotsatira mu magwiridwe antchito a zida:
(1) Chokometsera chimapitiriza kugwira ntchito, koma kutentha kosungirako sikungathe kuchepetsedwa;
(2) Kuthamanga kwa utsi wa compressor kumachepa;
(3) Kuthamanga kwa compressor kumakhala kochepa, kutentha kwakukulu kwa suction kumawonjezeka, chisanu kumbuyo kwa evaporator chimasungunuka, ndipo mutu wa compressor silinda umatentha;
(4) Kuchuluka kwa thovu kumawoneka pakati pa kayendedwe ka madzi a chizindikiro cha kupereka madzi;
(5) Mlingo wamadzimadzi wa condenser ndi wotsika kwambiri.
Pamene kutsegula kwa valavu yowonjezera kutentha kwasinthidwa pang'ono kwambiri, kuthamanga kwa suction kudzachepa, evaporator idzazizira ndi kusungunuka, ndipo chitoliro chokoka chidzazizira ndi kusungunuka. Chifukwa chake, ngati mulingo wa refrigerant sungathe kuwonedwa molondola. Pofuna kuweruza ngati kuchuluka kwa refrigerant mu dongosolo sikukwanira, njira zotsatirazi zingagwiritsidwe ntchito:
Siyani kugwiritsa ntchito valavu yokulitsa kutentha, tsegulani ndikusintha valavu yokulitsa yamanja moyenera, ndikuwona momwe dongosololi likugwirira ntchito kuti muwone ngati lingabwererenso mwakale. Ngati lingabwererenso mwakale, zikutanthauza kuti valavu yokulitsa kutentha sinakonzedwe bwino, apo ayi pali kusowa kwa refrigerant mu dongosololi. Refrigerant yosakwanira mu dongosololi (ngati si mphamvu yokwanira) ndiye chifukwa cha kutuluka kwa madzi. Chifukwa chake, pambuyo poti zatsimikizika kuti refrigerant ya dongosololi si yokwanira, kutuluka kwa madzi kuyenera kuzindikirika kaye, ndipo refrigerant iyenera kuwonjezeredwa pambuyo poti kutuluka kwa madzi kwachotsedwa.
Nthawi yotumizira: Mar-17-2023
