Kusamutsa Mphamvu mu Machitidwe Oziziritsa ndi Oziziritsa
Makina oziziritsira ndi oziziritsira ndi gawo lofunika kwambiri pa moyo wamakono, kuyambira m'mafiriji ndi mafiriji apakhomo mpaka m'makina oziziritsira mpweya, mpaka malo osungiramo zinthu zozizira m'makampani opanga chakudya ndi mankhwala. Pakati pa ukadaulo wonsewu pali kusamutsa mphamvu, makamaka mu mawonekedwe a kutentha, kuchokera pamalo amodzi kupita kwina. Chosangalatsa n'chakuti, cholinga cha makina oziziritsira si "kupanga kuzizira," koma kusamutsa kutentha kuchokera pamalo kuti kuziziritsidwe kupita kumalo akunja. Nkhaniyi ikufotokoza momwe mphamvu imasamutsidwira m'makina oziziritsira ndi oziziritsira, njira zomwe zimagwiritsidwa ntchito, ndi zigawo zazikulu zomwe zimapangitsa kusamutsa mphamvu kumeneku kukhala kogwira mtima.
Mfundo Zoyambira: Kutentha, Kutentha, ndi Mphamvu
Mu thermodynamics, kutentha kumasamutsidwa chifukwa cha kusiyana kwa kutentha. Ngati zinthu ziwiri kapena malo awiri ali ndi kutentha kosiyana, kutentha kumayenda kuchokera kutentha kwakukulu kupita kutentha kotsika. Komabe, mu dongosolo loziziritsira, "timakakamiza" kutentha kuti kuyende kuchokera pamalo otsika kutentha (monga firiji) kupita kumalo otentha (mpweya wakunja). Kuti izi zitheke, dongosololi limafuna ntchito yowonjezera kapena mphamvu, nthawi zambiri kuchokera ku magetsi kuti lipatse mphamvu compressor.
Motero, kusamutsa mphamvu mu makina oziziritsira nthawi zonse kumaphatikizapo zinthu ziwiri zofunika:
1. Kusamutsa kutentha kuchokera pamalo ozizira kupita ku refrigerant (choziziritsira).
2. Kulowetsa ntchito kuchokera ku compressor kuti kutentha kuyendetse kunja.
Mfundo Yogwirira Ntchito ya Nthunzi Yopondereza Firiji
Mafiriji ambiri ndi ma air conditioner amagwiritsa ntchito njira yochepetsera nthunzi. Njira imeneyi imagwiritsa ntchito kusintha kwa gawo la refrigerant (kuchokera ku madzi kupita ku nthunzi ndi mosemphanitsa) kuti itenge bwino ndikutulutsa kutentha. Pali zigawo zinayi zazikulu: evaporator, compressor, condenser, ndi expansion valve. Kusamutsa mphamvu kumachitika pa gawo lililonse.
1. Chotenthetsera: Kutengera Kutentha Kuchokera M'malo Ozizira
Evaporator ndi gawo lomwe lili pamalopo kuti liziziritsidwe. Apa, firiji yotsika imalowa ngati nthunzi yamadzimadzi kapena madzi ozizira, kenako imasanduka nthunzi. Njira yosanduka nthunzi imafuna mphamvu zambiri, zomwe zimatchedwa kutentha kobisika kwa nthunzi. Mphamvu imeneyi "imatengedwa" kuchokera mumlengalenga mkati mwa firiji kapena m'chipinda chomwe chimaziziritsidwa ndi choziziritsira mpweya.
Zotsatira zake:
– Mpweya wozungulira evaporator umataya kutentha → kutentha kwa chipinda kumatsika.
– Refrigerant imatenga kutentha → imasintha gawo kuchokera ku madzi kupita ku nthunzi.
Kusamutsa kutentha mu evaporator kumachitika kudzera mu njira zosiyanasiyana:
– Kutulutsa mpweya: mpweya umadutsa m'mapaipi a evaporator, ndikusamutsa kutentha.
– Kuyendetsa: kutentha kumadutsa m'makoma a mapaipi.
- Nthawi zina chothandizidwa ndi fani kuti chiwonjezere kuchuluka kwa convection kuti kuziziritsa kukhale kofulumira.
2. Kompresa: Kulowetsa Ntchito Kuti Muwonjezere Kupanikizika ndi Kutentha
Pambuyo potuluka mu evaporator, refrigerant imakhala ngati nthunzi yotsika mphamvu. Kenako compressor imakanikiza nthunzi iyi, ndikuwonjezera mphamvu yake kwambiri. Njira yokanikizayi imafuna mphamvu zamagetsi, zomwe zimasinthidwa kukhala mphamvu yamakina.
Kupsinjika kwa mphamvu:
- Kupanikizika kwa firiji kumakwera.
– Kutentha kwa firiji kumawonjezekanso, zomwe zimapangitsa kuti ikhale yotentha kuposa mpweya wakunja.
Ichi ndi chifukwa chake ma refrigerant amatha kutulutsa kutentha kupita kumalo otentha: chifukwa akamapanikizika, kutentha kwa refrigerant kumakhala kokwera kuposa kutentha kwa mlengalenga, kotero kuti kutentha kumatha kutuluka mwachilengedwe.
3. Kondensa: Kutulutsa Kutentha ku Chilengedwe
Choziziritsira mpweya nthawi zambiri chimakhala kunja kwa chipinda choziziritsira—mwachitsanzo, mu grille kumbuyo kwa firiji kapena panja pa chipangizo choziziritsira mpweya. Apa, choziziritsira mpweya chotentha, champhamvu kwambiri chimatulutsa kutentha kupita ku mpweya wakunja, komwe chimasintha gawo kukhala madzi.
Pa gawo ili, pali kusamutsa mphamvu mu mawonekedwe a:
– Kutentha kumatulutsidwa kuchokera mufiriji kupita ku mpweya wozungulira (kukana kutentha).
– Refrigerant imalowa mu condensation, kutulutsa kutentha kwakukulu kobisika.
Njira yosamutsira kutentha mu condenser nthawi zambiri imakhala:
- Kuzungulira kwachilengedwe kapena kokakamizidwa (pogwiritsa ntchito fani pa AC).
- Kudutsa m'makoma a mapaipi ndi zipsepse zomwe zimakulitsa malo otumizira kutentha.
Kondensala ikachotsa kutentha bwino, dongosololi limagwira ntchito bwino kwambiri.
4. Valavu Yokulitsa: Kutsika kwa Kupanikizika ndi Kutentha
Pambuyo pokhala madzi amphamvu kwambiri, refrigerant imadutsa mu valavu yokulitsa kapena chubu cha capillary. Izi zimapangitsa kuti kuthamanga kwadzidzidzi kuchepe, zomwe zimapangitsa kuti refrigerant ina isungunuke ndipo kutentha kwake kuchepe kwambiri. Njira imeneyi imatchedwa expansion kapena throttling.
Ngakhale kuti valavu yokulitsa sigwira ntchito yamakina, imagwira ntchito yofunika kwambiri pakusamutsa mphamvu chifukwa:
- Amalamulira kuyenda kwa refrigerant.
- Amachepetsa mphamvu ya enthalpy kuti firiji ikhale yokonzeka kuyamwa kutentha mu evaporator.
Zotsatira zake, firiji imaziziranso ndipo kayendedwe kake kamabwereranso.
Nchifukwa chiyani mafiriji ndi ofunikira kwambiri pakusamutsa mphamvu?
Mafiriji amasankhidwa chifukwa ali ndi makhalidwe a thermodynamic omwe amathandizira kusamutsa mphamvu moyenera, monga:
– Kutentha kwambiri kobisika, kotero kumatha kuyamwa/kutulutsa mphamvu zambiri posintha gawo.
- Malo otentha malinga ndi kutentha komwe kumagwiritsidwa ntchito.
- Yokhazikika komanso yogwirizana ndi zipangizo zamakina.
– Otetezeka komanso osawononga chilengedwe (ngakhale mibadwo ina yakale ya ma refrigerant imawononga ozone kapena imakhala ndi GWP yokwera).
Kusankha refrigerant kumakhudza magwiridwe antchito, chitetezo, komanso momwe makina oziziritsira amakhudzira chilengedwe.
Kuchuluka kwa Magwiridwe Antchito (COP) ndi Kugwiritsa Ntchito Mphamvu Mwachangu
Kugwira ntchito bwino kwa makina oziziritsira nthawi zambiri kumayesedwa pogwiritsa ntchito COP (Coefficient of Performance). Mwachidule:
– Za firiji:
COP = Kutentha komwe kumalowa mu evaporator / compressor
– Za mapampu otenthetsera (zotenthetsera):
COP = Kutentha komwe kumatulutsidwa mu ntchito ya condenser / compressor
Mphamvu yamagetsi ya COP yapamwamba imatanthauza kuti ndi mphamvu yamagetsi yochepa, makinawo amatha kusamutsa kutentha kwakukulu. Izi zikufotokoza chifukwa chake ma air conditioner kapena mafiriji "sasintha magetsi kukhala ozizira" mwachindunji, koma m'malo mwake amagwiritsa ntchito magetsi kupopera kutentha.
Zinthu zomwe zimakhudza COP ndi izi:
– Kusiyana kwa kutentha pakati pa evaporator ndi condenser (kusiyana kwakukulu, ndiko kulimba kwa compressor kugwira ntchito).
- Ukhondo wa condenser ndi evaporator.
- Ubwino wa kutchinjiriza chipinda chozizira.
- Mtundu ndi momwe firiji ilili.
- Kugwiritsa ntchito bwino kwa kompresa ndi kuwongolera kukulitsa.
Mitundu Ina Yosamutsa Mphamvu: Kutayika ndi Kulemera kwa Kutentha
Mwachizolowezi, makina oziziritsira samangochotsa kutentha kuchokera ku "chogulitsa" kapena mpweya, komanso amayenera kuthana ndi mitundu yosiyanasiyana ya kutentha, mwachitsanzo:
– Kulowa kwa mpweya pamene chitseko cha firiji chatsegulidwa kapena pamene mpweya ukutuluka m'chipinda choziziritsira.
– Kutentha kwa dzuwa kuchokera ku malo ozungulira.
- Kudutsa m'makoma ndi kutetezedwa kosayenera.
- Kutentha kuchokera ku ma fan motors, magetsi, kapena zipangizo zamagetsi zomwe zili mu chipinda choziziritsira.
– Kutentha kuchokera ku chinthu chomwe chikulowetsedwa (monga chakudya chotentha).
Kutentha konseku kumawonjezera kutentha komwe evaporator iyenera kuyamwa, zomwe zimapangitsa kuti compressor igwire ntchito nthawi yayitali, kuwonjezera kugwiritsa ntchito magetsi, komanso kuchepetsa mphamvu.
Kugwiritsa Ntchito ndi Kutanthauzo M'moyo Watsiku ndi Tsiku
Kumvetsetsa kusamutsa mphamvu mufiriji n'kothandiza kuti mugwiritse ntchito mphamvu moyenera, mwachitsanzo:
- Sungani kondensala yoyera kuti kutentha kusamathe bwino.
– Musaike chakudya chotentha mwachindunji mufiriji.
- Chepetsani kuchuluka kwa nthawi yotsegulira chitseko cha firiji.
- Onetsetsani kuti chitseko chili cholimba kuti mpweya wofunda usalowe.
- Ikani kutentha kwa AC moyenera (monga 24–26°C) kuti kusiyana kwa kutentha kusakhale kwakukulu kwambiri.
Njira yosavuta imeneyi imakhudza mwachindunji kuchuluka kwa mphamvu zomwe zimagwiritsidwa ntchito komanso momwe magetsi amagwiritsidwira ntchito.
Mapeto
Kusamutsa mphamvu mu makina oziziritsira ndi njira yosamutsira kutentha kuchokera pamalo otentha pang'ono kupita kumalo otentha kwambiri pogwiritsa ntchito compressor. Kuzungulira kwa nthunzi—kudzera mu evaporator, compressor, condenser, ndi expansion valve—kumalola refrigerant kuyamwa ndi kutulutsa kutentha mobwerezabwereza, makamaka kudzera mu kusintha kwa gawo komwe kuli ndi mphamvu yobisika. Kugwira ntchito bwino kwa dongosolo kumadalira kuthekera kwa zigawo kukana ndi kuyamwa kutentha, kusiyana kwa kutentha kogwiritsa ntchito, ndi kuyang'anira kutentha komwe kumachokera ku chilengedwe. Pomvetsetsa njira zosamutsira mphamvuzi, titha kusamalira ndikugwiritsa ntchito zida zoziziritsira bwino kwambiri, moyenera komanso mopanda kuwononga chilengedwe.
