Hazvidzivisiki kuti mafiriji masisitimu anoshanda nematembiricha ekusveta akazara pasi pechando anozopedzisira awana kuungana kwechando pamachubhu evaporator uye zvimbi. Iyo chando inoshanda sechidziviriro pakati pekupisa kunotamiswa kubva munzvimbo uye firiji, zvichiita kuti kuderedzwa kwe evaporator kunyatsoshanda. Nokudaro, vagadziri vemidziyo vanofanira kushandisa dzimwe nzira dzokubvisa chando ichi nguva nenguva kubva pacoil.Nzira dzokubvisa chando dzingasanganisira, asi hadzina kuganhurirwa ku-off cycle kana air defrost, magetsi negasi (izvo zvichakurukurwa muChikamu II mumagazini yaMarch). Uyewo, kugadziridzwa kwezvirongwa izvi zvokubvisa chando kunowedzera imwezve kuoma kwevashandi vomumunda. Kana yakanyatso gadziridzwa, nzira dzese dzinowana imwechete inodiwa mhedzisiro yekunyungudutsa kuunganidzwa kwechando. Kana defrost cycle ikasagadzikwa nemazvo, mhedzisiro isina kukwana defrosts (uye kuderedzwa kwe evaporator kunyatsoshanda) inogona kukonzera tembiricha yakakwira kupfuura yaidiwa munzvimbo ine firiji, firiji mafashama kana nyaya dzekutema mafuta.
Semuyenzaniso, yakajairika nyama inoratidzira kesi inochengetedza tembiricha yechigadzirwa ye34F inogona kunge iine tembiricha yemhepo inoyerera ingangoita 29F uye tembiricha yakazara evaporator ye22F. Kunyangwe iyi iri yepakati tembiricha yekushandisa uko tembiricha yechigadzirwa iri pamusoro pe32F, machubhu evaporator uye zvimbi zvichange zviri patembiricha iri pasi pe32F, nokudaro zvichigadzira kuungana kwechando. Off cycle defrost inowanzoitika pane epakati tembiricha application, zvisinei hazvishamisi kuona gasi defrost kana electric defrost mune izvi maapplication.
firiji defrost
Mufananidzo 1 Frost buildup
OFF CYCLE DEFROST
An off cycle defrost inongoita sezvainonzwika; defrosting inopedzwa nekungovhara kutenderera kwefiriji, kudzivirira refrigerant kupinda mu evaporator. Kunyange zvazvo evaporator inogona kushanda iri pasi pe 32F, tembiricha yemhepo munzvimbo yefiriji iri pamusoro pe32F. Nefiriji yabviswa, kubvumira mweya uri mufiriji kuti urambe uchitenderera kuburikidza ne evaporator chubhu/zvimbi zvinosimudza tembiricha ye evaporator, ichinyungudutsa chando. Mukuwedzera, iyo yakajairika mhepo kupinda munzvimbo yefiriji ichaita kuti tembiricha yemhepo ikwire, ichiwedzera kubatsira neiyo defrost cycle. Mukushandisa uko tembiricha yemhepo iri mufiriji inowanzoitika pamusoro pe32F, off cycle defrost inoratidza kuti inzira inoshanda yekunyungudutsa chando uye ndiyo nzira inonyanyozivikanwa yekubvisa chando mumatembiricha ari pakati nepakati.
Kana iyo off cycle defrost yatangwa, kuyerera kwefiriji kunodzivirirwa kupinda muevaporator coil uchishandisa imwe yeiyi nzira dzinotevera: shandisa defrost time clock kutenderedza compressor kure (single compressor unit), kana kutenderera kubva pa system liquid line solenoid valve kutanga pombi-pasi kutenderera (imwe chete compressor unit kana multiplex cycle regula regula regivhavha), mune multiplex rack.
firiji defrost
Mufananidzo 2 Yakajairika defrost/pumpdown wiring diagram
Mufananidzo 2 Yakajairika defrost/pumpdown wiring diagram
Ziva kuti mune imwechete compressor application apo iyo defrost nguva wachi inotanga kupomba-pasi kutenderera, iyo yemvura mutsetse solenoid vharafu inobva yabviswa simba. Iyo compressor icharamba ichishanda, ichipomba refrigerant kunze kweiyo system yakaderera uye ichipinda mune yemvura inogamuchira. Iyo compressor inotenderera ichienda kana iyo suction pressure inowira kune yakachekwa-out set point yeyakaderera kudzora kudzora.
Mune multiplex compressor rack, wachi yenguva inowanzo tenderera ichidzima simba kune yemvura mutsara solenoid vharafu uye suction regulator. Izvi zvinochengetedza huwandu hwefiriji mu evaporator. Sezvo tembiricha ye evaporator ichiwedzera, huwandu hwefiriji mu evaporator inosanganawo nekuwedzera kwetembiricha, ichiita senyuchi yekupisa kubatsira nekusimudza tembiricha yepasi pe evaporator.
Hapana imwe sosi yekupisa kana simba inodiwa kuti iite off cycle defrost. Iyo sisitimu inodzokera kune firiji modhi chete mushure mekunge nguva kana tembiricha yasvika. Icho chikumbaridzo chepakati tembiricha application chinenge chakapoteredza 48F kana 60 maminetsi ekuzorora. Maitiro aya anobva adzokororwa kusvika kana kana pazuva zvichienderana nekesi yekuratidzira (kana W/I evaporator) kurudziro yemugadziri.
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ELECTRIC DEFROST
Kunyangwe ichinyanya kuwanda pane yakaderera tembiricha maapplication, magetsi defrost anogona zvakare kushandiswa pane yepakati tembiricha maapplication. Pakudzikira tembiricha yekushandisa, off cycle defrost haishande nekuti mhepo iri munzvimbo ine firiji iri pasi pe32F. Naizvozvo, pamusoro pekuvhara kutenderera kwefiriji, kunze kwekunze kwekupisa kunodiwa kusimudza tembiricha ye evaporator. Magetsi defrost imwe nzira yekuwedzera kunze kwekupisa kunyungudutsa kuungana kwechando.
Imwe kana kupfuura kuramba kudziyisa tsvimbo inoiswa pamwe nehurefu hweevaporator. Kana iyo defrost nguva wachi inotanga kutenderera kwemagetsi defrost, zvinhu zvakati wandei zvichaitika panguva imwe chete:
(1) Switch inowanzoitika yakavharwa mu defrost time wachi iyo inopa simba kune evaporator fan motors inovhura. Dunhu iri rinogona kuita simba rakananga evaporator fan motors, kana macoil ekubatira emunhu evaporator fan mota anobatika. Izvi zvinotenderedza evaporator fan motors, zvichibvumira kupisa kunogadzirwa kubva kune defrost heaters kuti kunamire pane evaporator pamusoro chete, pane kuendeswa kumhepo yaizotenderedzwa nemafeni.
(2) Imwezve inovharika switch mu defrost nguva wachi iyo inopa simba kune yemvura mutsetse solenoid (uye suction line regulator, kana imwe iri kushandiswa) ichavhura. Izvi zvichavhara mvura mutsara solenoid valve (uye suction regulator kana yakashandiswa), kudzivirira kuyerera kwefiriji kune evaporator.
(3) Iyo inowanzo kuvhurika switch mu defrost nguva wachi ichavhara. Izvi zvingave zvinopa zvakananga simba kune defrost heaters (zvidiki zvakaderera amperage defrost heater applications), kana kupa simba kune inobata coil ye defrost hita kontrakta. Dzimwe nguva wachi dzakavaka macontactor ane amperage ratings akakwira anokwanisa kupa simba zvakananga kune defrost heaters, kubvisa kudiwa kweiyo yakaparadzana defrost hita contactor.
firiji defrost
Mufananidzo 3 Magetsi heater, defrost kumisa uye fan inononoka kumisikidzwa
Magetsi defrost inopa yakanyanya kunaka defrost pane off cycle, ine nguva pfupi. Zvakare, iyo defrost cycle ichapera nenguva kana tembiricha. Pakupedza defrost panogona kunge paine nguva yekudonha; nguva pfupi inobvumira chando chakanyunguduka kuti chidonhe kubva panzvimbo ye evaporator uye kupinda mupani yekudhonza. Uye zvakare, iyo evaporator fan motors inozononoka kutangazve kwenguva pfupi mushure mekutanga kutenderera kwefiriji. Izvi ndezvekuona kuti chero hunyoro huchiripo pane evaporator pamusoro hauzoputirwe munzvimbo ine firiji. Pane kudaro, inotonhora uye inoramba iri pamusoro pe evaporator. Iko kunonoka kwefan kunoderedzawo huwandu hwemhepo inodziya inotenderedzwa munzvimbo ine firiji mushure mekunge defrost yapera. Kunonoka kweFan kunogona kuitwa nekudzora tembiricha (thermostat kana klixon), kana kunonoka nguva.
Magetsi defrost inzira iri nyore yekudzikisa mukushandisa uko off cycle isingaite. Magetsi anoiswa, kupisa kunogadzirwa uye chando chinonyunguduka kubva kune evaporator. Nekudaro, kana tichienzanisa neiyo off cycle defrost, electric defrost ine zvishoma zvisina kunaka pairi: semari yenguva imwe chete, iyo yakawedzerwa mutengo wekutanga wehita tsvimbo, mamwe macontactor, relays uye kunonoka switch, pamwe nekuwedzera basa uye zvinhu zvinodiwa pa wiring yemunda zvinofanirwa kutariswa. Zvakare, mari inoenderera mberi yekuwedzera magetsi inofanira kutaurwa. Kudiwa kwesimba rekunze kwesimba rekugonesa maheater ekudzima zvinounza chirango chesimba remambure kana tichienzanisa ne off cycle.
Saka, izvo ndezve off cycle, air defrost uye magetsi defrost nzira. Muchinyorwa chaKurume tichaongorora defrost yegasi zvakadzama.
Nguva yekutumira: Feb-18-2025