Valavu yokulitsa kutentha, chubu cha capillary, valavu yokulitsa zamagetsi, zida zitatu zofunika kwambiri zokoka
Njira yothira madzi ndi imodzi mwa zinthu zofunika kwambiri mu chipangizo choziziritsira. Ntchito yake ndikuchepetsa madzi okhuta (kapena madzi ozizira pang'ono) pansi pa mphamvu yothira madzi mu condenser kapena cholandirira madzi kupita ku mphamvu yothira madzi ndi kutentha kwa evaporation pambuyo pothira madzi. Malinga ndi kusintha kwa katundu, kuyenda kwa refrigerant kulowa mu evaporator kumasinthidwa. Zipangizo zothira madzi zomwe zimagwiritsidwa ntchito kwambiri zimaphatikizapo machubu a capillary, ma valve okulitsa kutentha, ndi ma valve oyandama.
Ngati kuchuluka kwa madzi omwe amaperekedwa ndi makina opopera ku evaporator ndi kwakukulu kwambiri poyerekeza ndi katundu wa evaporator, gawo lina la madzi oziziritsira lidzalowa mu compressor limodzi ndi refrigerant ya gaseous, zomwe zimayambitsa ngozi ya kuponderezedwa kwa madzi kapena ngozi ya nyundo yamadzimadzi.
M'malo mwake, ngati kuchuluka kwa madzi ndi kochepa kwambiri poyerekeza ndi kutentha kwa evaporator, gawo lina la malo osinthira kutentha kwa evaporator silingathe kugwira ntchito mokwanira, ndipo ngakhale kuthamanga kwa evaporation kudzachepa; ndipo mphamvu yozizira ya dongosolo idzachepa, coefficient yozizira idzachepa, ndipo kutentha kwa compressor kumakwera, zomwe zimakhudza mafuta abwinobwino a compressor.
Madzi oziziritsa akadutsa m'bowo laling'ono, gawo lina la kuthamanga kwa mpweya wosasunthika limasanduka kuthamanga kwa mpweya, ndipo kuthamanga kwa mpweya kumawonjezeka kwambiri, kukhala kuyenda kosasunthika, madziwo amasokonezeka, kukana kukangana kumawonjezeka, ndipo kuthamanga kwa mpweya wosasunthika kumachepa, kotero kuti madziwo amatha kukwaniritsa cholinga chochepetsa kuthamanga kwa mpweya ndikuyendetsa kuyenda kwa mpweya.
Kupopera ndi chimodzi mwa zinthu zinayi zofunika kwambiri pa nthawi yoziziritsa.
Njira yolumikizirana ndi ma throttling ili ndi ntchito ziwiri:
Chimodzi mwa izi ndi kupondereza ndi kuchepetsa mphamvu ya firiji yamadzimadzi othamanga kwambiri yomwe imatuluka mu condenser kupita ku mphamvu ya evaporation.
Chachiwiri ndikusintha kuchuluka kwa madzi oziziritsa omwe amalowa mu evaporator malinga ndi kusintha kwa katundu wa dongosolo.
1. Valavu yowonjezera kutentha
Valavu yowonjezera kutentha imagwiritsidwa ntchito kwambiri mu Freon refrigerant system. Kudzera mu ntchito yozindikira kutentha, imasintha yokha ndi kusintha kwa kutentha kwa refrigerant pamalo otulukira evaporator kuti ikwaniritse cholinga chosintha kuchuluka kwa madzi omwe amapezeka mu refrigerant.
Ma valve ambiri owonjezera kutentha amakhala ndi kutentha kwakukulu pa 5 mpaka 6°C asanatuluke mufakitale. Kapangidwe ka valavu kamatsimikizira kuti kutentha kwakukulu kukawonjezeka ndi 2°C ina, valavu imakhala pamalo otseguka kwathunthu. Kutentha kwakukulu kukafika pafupifupi 2°C, valavu yowonjezerera imatsekedwa. Kasupe wosinthira wowongolera kutentha kwakukulu, mulingo wosinthira ndi 3～6℃.
Kawirikawiri, kutentha kwambiri komwe kumayikidwa ndi valavu yowonjezera kutentha, mphamvu yoyamwa kutentha ya evaporator imachepa, chifukwa kuwonjezera kutentha kwambiri kumatenga gawo lalikulu la malo osamutsira kutentha kumbuyo kwa evaporator, kotero kuti nthunzi yokhuta ikhoza kutenthedwa kwambiri pano. Imakhala gawo la malo osamutsira kutentha a evaporator, kotero kuti dera la nthunzi yoziziritsira ndi kuyamwa kutentha kumachepa, ndiko kuti, pamwamba pa evaporator sipagwiritsidwa ntchito mokwanira.
Komabe, ngati kutentha kwambiri kuli kochepa kwambiri, madzi oziziritsa akhoza kulowetsedwa mu compressor, zomwe zimapangitsa kuti nyundo yamadzi isagwire bwino ntchito. Chifukwa chake, malamulo a kutentha kwambiri ayenera kukhala oyenera kuti firiji yokwanira ilowe mu evaporator pomwe ikuletsa madzi oziziritsa kulowa mu compressor.
Valavu yokulitsa kutentha imapangidwa makamaka ndi thupi la valavu, phukusi lozindikira kutentha ndi chubu cha capillary. Pali mitundu iwiri ya valavu yokulitsa kutentha: mtundu wa balance yamkati ndi mtundu wa balance yakunja malinga ndi njira zosiyanasiyana zowerengera diaphragm.
Valavu yowonjezera kutentha yolinganizidwa mkati
Valavu yokulitsa kutentha yolinganizidwa mkati imapangidwa ndi thupi la valavu, ndodo yokankhira, mpando wa valavu, singano ya valavu, kasupe, ndodo yowongolera, babu lozindikira kutentha, chubu cholumikizira, diaphragm yozindikira ndi zinthu zina.
Valavu yowonjezera kutentha yolinganizidwa bwino
Kusiyana pakati pa valavu yowonjezera kutentha ya mtundu wa balance yakunja ndi mtundu wa balance yamkati mu kapangidwe ndi kuyika ndikuti malo omwe ali pansi pa diaphragm ya balance yakunja salumikizidwa ndi chotulutsira valavu, koma chitoliro chaching'ono cha diameter balance chimagwiritsidwa ntchito kulumikizana ndi chotulutsira evaporator. Mwanjira imeneyi, kupanikizika kwa firiji komwe kumagwira ntchito pansi pa diaphragm sikuli Po pamalo olowera a evaporator pambuyo pokoka, koma kupanikizika kwa Pc pamalo otulutsira evaporator. Mphamvu ya diaphragm ikalinganizidwa, imakhala Pg=Pc+Pw. Mlingo wotsegulira wa valavu sukhudzidwa ndi kukana kwa kayendedwe ka evaporator coil, motero kuthana ndi zofooka za mtundu wa balance yamkati. Mtundu wa balance yakunja umagwiritsidwa ntchito kwambiri nthawi zomwe kukana kwa evaporator coil kuli kwakukulu.
Kawirikawiri, digiri ya nthunzi ya superheat ikatsekedwa valavu yowonjezera imatchedwa digiri ya superheat yotsekedwa, ndipo digiri ya superheat yotsekedwa imafanananso ndi digiri ya superheat yotseguka pamene dzenje la valavu likuyamba kutseguka. Superheat yotseka imakhudzana ndi kudzaza kwa kasupe, komwe kungasinthidwe ndi chosinthira chosinthira.
Kutentha kwakukulu pamene kasupe wasinthidwa kukhala malo omasuka kwambiri kumatchedwa kutentha kochepa kotsekedwa; m'malo mwake, kutentha kwakukulu pamene kasupe wasinthidwa kukhala kolimba kwambiri kumatchedwa kutentha kwakukulu kotsekedwa. Kawirikawiri, digiri yocheperako yotsekedwa ya valavu yowonjezera si yoposa 2℃, ndipo digiri yokwanira yotsekedwa ya superheat si yochepera 8℃.
Pa valavu yokulitsa kutentha kwamkati, kuthamanga kwa evaporation kumagwira ntchito pansi pa diaphragm. Ngati kukana kwa evaporator kuli kwakukulu, padzakhala kutayika kwakukulu kwa kukana kwa madzi pamene refrigerant ikuyenda mu evaporators ena, zomwe zidzakhudza kwambiri valavu yokulitsa kutentha. Kugwira ntchito kwa evaporator kumawonjezeka, zomwe zimapangitsa kuti kutentha kwambiri kuchuluke pamalo otulukira evaporator, komanso kugwiritsa ntchito mosayenera malo osinthira kutentha kwa evaporator.
Pa ma valve okulitsa kutentha omwe ali ndi mphamvu yofanana ndi yakunja, kupanikizika komwe kumagwira ntchito pansi pa diaphragm ndi kupsinjika kwa evaporator, osati kupsinjika kwa evaporation, ndipo zinthu zimakhala bwino.
2. Mitsempha ya m'mimba
Kapilari ndi chipangizo chosavuta kwambiri chopopera. Kapilari ndi chubu chopyapyala kwambiri cha mkuwa chokhala ndi kutalika kodziwika, ndipo m'mimba mwake wamkati nthawi zambiri umakhala pakati pa 0.5 ndi 2 mm.
Makhalidwe a capillary ngati chipangizo chopondereza
(1) Kapilari imatengedwa kuchokera ku chubu chofiira cha mkuwa, chomwe ndi chosavuta kupanga komanso chotsika mtengo;
(2) Palibe ziwalo zosuntha, ndipo sikophweka kuyambitsa kulephera ndi kutayikira;
(3) Lili ndi makhalidwe a kudzibwezera,
(4) Chipangizo choziziritsira chikasiya kugwira ntchito, kuthamanga kwa mpweya kumbali ya kupanikizika kwakukulu ndi kuthamanga kwa mpweya kumbali ya kupanikizika kochepa mu makina oziziritsira zitha kukhazikika mwachangu. Chikayambanso kugwira ntchito, mota ya chipangizo choziziritsira imayamba.
3. Valavu yokulitsa zamagetsi
Valavu yokulitsa yamagetsi ndi mtundu wa liwiro, womwe umagwiritsidwa ntchito mu chowongolera mpweya chowongolera mwanzeru. Ubwino wa valavu yokulitsa yamagetsi ndi: kusintha kwakukulu kwa kayendedwe ka madzi; kulondola kwambiri; yoyenera kuwongolera mwanzeru; yoyenera kusintha mwachangu kayendedwe ka madzi oziziritsa.
Ubwino wa Ma Valves Okulitsa Ma Electronic
Kusinthasintha kwakukulu kwa kayendedwe ka madzi;
Kuwongolera kwakukulu;
Yoyenera kulamulira mwanzeru;
Ingagwiritsidwe ntchito pakusintha mwachangu kwa kayendedwe ka refrigerant ndi mphamvu yayikulu.
Kutsegula kwa valavu yokulitsa yamagetsi kumatha kusinthidwa kuti kugwirizane ndi liwiro la compressor, kotero kuti kuchuluka kwa firiji yomwe imaperekedwa ndi compressor ikugwirizana ndi kuchuluka kwa madzi omwe amaperekedwa ndi valavu, kotero kuti mphamvu ya evaporator ikwaniritsidwe kwambiri ndipo kuwongolera bwino kwa makina oziziritsira mpweya ndi firiji kukwaniritsidwe.
Kugwiritsa ntchito valavu yokulitsa yamagetsi kungathandize kukonza mphamvu ya compressor ya inverter, kusintha kutentha mwachangu, ndikuwonjezera mphamvu ya nyengo ya dongosolo. Pa ma air conditioner amphamvu kwambiri a inverter, mavalavu okulitsa yamagetsi ayenera kugwiritsidwa ntchito ngati zida zopumira.
Kapangidwe ka valavu yokulitsa yamagetsi kamakhala ndi magawo atatu: kuzindikira, kuwongolera ndi kuchita. Malinga ndi njira yoyendetsera, imatha kugawidwa m'magulu amagetsi ndi mtundu wamagetsi. Mtundu wamagetsi umagawidwanso m'magulu amagetsi ogwirira ntchito mwachindunji ndi mtundu wa deceleration. Mota yokwerera yokhala ndi singano ya valavu ndi mtundu wogwirira ntchito mwachindunji, ndipo mota yokwerera yokhala ndi singano ya valavu kudzera mu chochepetsera giya ndi mtundu wochepetsera.
Nthawi yotumizira: Novembala-25-2022
