ʻO nā mea pā no nā ʻōnaehana ducted ventilation

Nānā kēia module i nā mea pā centrifugal a me axial i hoʻohana ʻia no nā ʻōnaehana ducted ventilation a noʻonoʻo i nā mea i koho ʻia, me kā lākou mau hiʻohiʻona a me nā ʻano hana.

ʻO nā ʻano peʻahi maʻamau ʻelua i hoʻohana ʻia i nā lawelawe kūkulu hale no nā ʻōnaehana ducted i kapa ʻia he centrifugal a me axial fans - ka inoa e loaʻa mai ana i ke kuhikuhi ʻana o ka holo ʻana o ka ea ma o ka peʻa.Hoʻokaʻawale ʻia kēia mau ʻano ʻelua i loko o nā ʻano subtypes i kūkulu ʻia e hāʻawi i nā hiʻohiʻona o ka kahe / kaomi ʻana, a me nā ʻano hana ʻē aʻe (me ka nui, ka walaʻau, ka haʻalulu, ka maʻemaʻe, ka mālama a me ka ikaika).

Papa 1: Ua paʻi ʻo ʻAmelika a me ʻEulopa i ka ʻikepili hoʻokō hoʻokō kiʻekiʻe no nā mea pā> 600mm ke anawaena

ʻO kekahi o nā ʻano peʻahi i ʻike pinepine ʻia i hoʻohana ʻia ma HVAC ua helu ʻia ma ka Papa 1, me ka hōʻike ʻana i nā pono kiʻekiʻe i hōʻiliʻili ʻia1 mai ka ʻikepili i paʻi ʻia e nā mea hana US a me ʻEulopa.Ma waho aʻe o kēia mau mea, ʻo ka peʻa 'plug' (ʻo ia ke ʻano o ka centrifugal fan) ua ʻike i ka piʻi nui ʻana i nā makahiki i hala.

Kiʻi 1: Nā ʻōkuhi peʻahi maʻamau.Hiki ke ʻokoʻa nā mea pā maoli mai kēia mau pihi maʻalahi

Hōʻike ʻia nā ʻōkuhi peʻahi hiʻohiʻona ma ke Kiʻi 1. ʻO kēia nā mea i hoʻonui ʻia, nā ʻāpana kūpono, a ʻokoʻa paha nā pā maoli mai kēia mau mea;akā naʻe, hōʻike paha lākou i nā ʻano like.Hoʻopili kēia i nā wahi o ka paʻa ʻole ma muli o ka hahai holoholona, kahi e hiki ai i ka peʻa ke hoʻohuli i waena o ʻelua mau kahe kahe ʻana ma ka puʻe like a i ʻole ma muli o ke kūpaʻa ʻana o ka peʻa (e nānā i ka Stalling of air flow box).Pono nā mea hana e ʻike i nā pae hana 'palekana' i makemake ʻia i kā lākou palapala.

Pepa Centrifugal

Me nā pā centrifugal, komo ka ea i ka impeller ma kona axis, a laila hoʻokuʻu ʻia mai ka impeller me ka neʻe centrifugal.Hiki i kēia mau mea pā ke hana i nā kaomi kiʻekiʻe a me nā kahe kahe kiʻekiʻe.Hoʻopili ʻia ka hapa nui o nā mea pā centrifugal maʻamau i loko o kahi hale ʻano ʻōwili (e like me ke Kiʻi 2) e hana ana e kuhikuhi i ka ea neʻe a hoʻololi pono i ka ikehu kinetic i ke kaomi paʻa.No ka hoʻoneʻe hou ʻana i ka ea, hiki ke hoʻolālā ʻia ka peʻahi me kahi 'impeller pālua laula ʻelua', e ʻae i ka ea e komo ma nā ʻaoʻao ʻelua o ka pahu.

Kiʻi 2: Pepa Centrifugal i loko o ka pahu pahu, me kahi impeller i hope.

Aia kekahi mau ʻano o nā lau i hiki ke hana i ka impeller, me nā ʻano nui he ʻāwili i mua a i hope i hope - ʻo ke ʻano o ka maka e hoʻoholo ai i kāna hana, hiki ke kūpono a me ke ʻano o ka pihi peʻa maʻamau.ʻO nā mea ʻē aʻe e pili ana i ka pono o ka peʻa, ʻo ia ka laulā o ka huila impeller, ka ʻokoʻa ma waena o ka cone inlet a me ka impeller rotating, a me ka wahi i hoʻohana ʻia i ka hoʻokuʻu ʻana i ka ea mai ka peʻa (ka mea i kapa ʻia ʻo 'blast area') .

ʻO kēia ʻano peʻahi i hoʻokele maʻamau ʻia e kahi kaʻa me ke kāʻei a me ka hoʻonohonoho pulley.Eia nō naʻe, me ka hoʻomaikaʻi ʻana i nā kaohi uila uila a me ka hoʻonui ʻia ʻana o nā kaʻa uila i hoʻololi ʻia ('EC' a i ʻole brushless), ua hoʻohana pinepine ʻia nā kaʻa pololei.ʻAʻole wale kēia e hoʻoneʻe i nā hemahema i loaʻa i loko o kahi kāʻei kāʻei (ʻo ia paha kekahi mea mai 2% a ʻoi aku ma mua o 10%, e pili ana i ka mālama ʻana2) akā hiki ke hoʻemi i ka haʻalulu, hoʻemi i ka mālama ʻana (ka liʻiliʻi o nā bearings a me nā koi hoʻomaʻemaʻe) a hana i ka hui. ʻoi aku ka paʻa.

Pepa centrifugal i hope

Hōʻike ʻia nā mea pā ʻāpiʻi hope (a i ʻole 'inclined') e nā lau e hili ana mai ka ʻaoʻao o ka hoʻololi ʻana.Hiki iā lākou ke hiki i ka 90% i ka wā e hoʻohana ai i nā ʻāpana aerofoil, e like me ka hōʻike ʻana ma ke Kiʻi 3, a i ʻole me nā ʻaoʻao maʻemaʻe i hoʻohālikelike ʻia i ʻekolu anana, a emi iki ke hoʻohana ʻana i nā ʻūhā ʻōniʻoniʻo maʻamau, a emi iki ke hoʻohana ʻana i ka pā pālahalaha maʻalahi i hope.Haʻalele ka ea i ka piko o ka impeller me ka haʻahaʻa haʻahaʻa, no laila, haʻahaʻa ka nalo o ka friction i loko o ka pahu a haʻahaʻa hoʻi ka walaʻau i hana ʻia e ka ea.Hiki iā lākou ke kūpaʻa ma ka palena o ka pihi hana.Hiki i nā impellers ākea ākea ke hāʻawi i ka hana maikaʻi loa, a hiki iā ia ke hoʻohana maʻalahi i nā ʻāpana aerofoil profiled nui loa.E hōʻike ʻia nā pōmaikaʻi liʻiliʻi mai ka hoʻohana ʻana i nā aerofoils no laila e hoʻohana i nā ʻāpana pā pālahalaha.ʻIke nui ʻia nā mea pā curved hope no ko lākou hiki ke hana i nā kaomi kiʻekiʻe i hui pū ʻia me ka leo haʻahaʻa, a loaʻa iā ia kahi ʻano mana non-overloading - ʻo ia hoʻi ke emi ʻana o ke kūʻē ʻana i loko o kahi ʻōnaehana a hoʻonui ka kahe kahe ʻana i ka mana huki ʻia e ka mīkini uila. .ʻOi aku ka ikaika o ke kūkulu ʻia ʻana o nā pā ʻāwili i hope a ʻoi aʻe ke kaumaha ma mua o ka mea ʻoi aku ka maikaʻi ʻole o ka peʻahi piʻo i mua.Hiki i ka lohi o ka ea o ka lewa ma nā lau ke ʻae i ka hōʻiliʻili ʻana o nā mea haumia (e like me ka lepo a me ka momona).

Kiʻi 3: Kiʻi kiʻi o nā impellers centrifugal fan

Pepa centrifugal i mua

Hōʻike ʻia nā mea pā curved i mua e ka heluna nui o nā ʻaoʻao curved i mua.E like me ka mea maʻamau e hana i nā kaomi haʻahaʻa, ʻoi aku ka liʻiliʻi, ʻoi aku ka māmā a ʻoi aku ka liʻiliʻi ma mua o ka mea like me ka powered backward curved fan.E like me ka mea i hōʻike ʻia ma ke Kiʻi 3 a me ke Kiʻi 4, e loaʻa i kēia ʻano impeller peʻahi 20-plus i hiki ke maʻalahi e like me ka hana ʻana mai kahi ʻāpana metala hoʻokahi.Loaʻa ka maikaʻi i hoʻomaikaʻi ʻia ma nā nui nui me nā lau i hana ʻia.Haʻalele ka ea i nā ʻōlelo aʻoaʻo o ka pahi me ka wikiwiki tangential kiʻekiʻe, a pono e hoʻololi ʻia kēia ikehu kinetic i ke kaomi paʻa i loko o ka pahu - e hōʻemi kēia i ka pono.Hoʻohana maʻamau ʻia lākou no nā lewa haʻahaʻa a haʻahaʻa ma ke kaomi haʻahaʻa (maʻamau <1.5kPa), a he haʻahaʻa haʻahaʻa haʻahaʻa ma lalo o 70%.He mea koʻikoʻi ka pahu scroll i ka hoʻokō ʻana i ka hana maikaʻi loa, ʻoiai e haʻalele ka ea i ka piko o nā lau i ka wikiwiki kiʻekiʻe a hoʻohana ʻia e hoʻololi pono i ka ikehu kinetic i ke kaomi static.Holo lākou i nā māmā holo haʻahaʻa, a no laila, ʻoi aku ka liʻiliʻi o nā pae walaʻau i hana ʻia e ka mechanical ma mua o ka wikiwiki o ka ʻoi aku ka wikiwiki o nā mea hoʻoheheʻe i hope.Loaʻa i ka peʻahi kahi hiʻohiʻona mana overloading i ka wā e hana ana i nā pale ʻōnaehana haʻahaʻa.

Kiʻi 4: Peʻahi centrifugal i mua me ka mīkini hoʻohui

ʻAʻole kūpono kēia mau mea pā ma kahi, no ka laʻana, ua haumia nui ka ea i ka lepo a i ʻole e lawe i nā kulu momona i komo.

Kiʻi 5: Ka laʻana o ka peʻahi hoʻoheheʻe ʻia me nā ʻaoʻao ʻaoʻao i hope

Pepa centrifugal radial bladed

ʻO ka radial bladed centrifugal fan ka pōmaikaʻi o ka hiki ke hoʻoneʻe i nā ʻāpana ea i hoʻohaumia ʻia a ma nā puʻe kiʻekiʻe (ma ke kauoha o 10kPa) akā, e holo ana i nā wikiwiki kiʻekiʻe, he walaʻau loa a ʻaʻole pono (<60%) a no laila ʻaʻole pono. hoʻohana ʻia no ka HVAC kumu nui.Loaʻa iā ia kekahi ʻano mana overloading - ʻoiai ua hoʻemi ʻia ke kūʻē ʻana o ka ʻōnaehana (ma ka wehe ʻana paha o ka volume control dampers), e piʻi aʻe ka mana kaʻa a, ma muli o ka nui o ka kaʻa, hiki paha ke 'hoʻonui'.

Pākuʻi pā

Ma kahi o ka hoʻokomo ʻia ʻana i loko o kahi pahu ʻōwili, hiki ke hoʻohana pololei ʻia kēia mau mea hoʻokele centrifugal i hoʻolālā ʻia i loko o ka pahu o ka ʻāpana e mālama ai i ka ea (a, ʻoiaʻiʻo, i loko o kekahi duct a plenum), a ʻoi aku ka haʻahaʻa o ko lākou kumukūʻai mua ma mua o hale centrifugal pā.ʻIke ʻia ʻo 'plenum', 'plug' a i ʻole 'unhoused' centrifugal fans, hiki iā lākou ke hāʻawi i kekahi mau pono ākea akā ma ke kumu kūʻai o ka nalowale o ka hana pono (me ka maikaʻi maikaʻi loa e like me kēlā no nā mea pā centrifugal curved i mua).E huki nā mea pā i ka ea i loko o ka cone inlet (e like me ke ʻano o ka peʻahi hale) a laila e hoʻokuʻu i ka ea a puni ka 360° a puni o waho o ka impeller.Hiki iā lākou ke hāʻawi i kahi maʻalahi o nā pilina puka (mai ka plenum), ʻo ia hoʻi, ʻoi aku ka liʻiliʻi o ka pono no nā piko pili a i ʻole nā hoʻololi ʻoi i loko o ka ductwork e hoʻohui iā lākou iho i ka hāʻule ʻana o ka ʻōnaehana (a, no laila, ka mana fan hou).Hiki ke hoʻomaikaʻi ʻia ka maikaʻi o ka ʻōnaehana holoʻokoʻa ma o ka hoʻohana ʻana i nā hoʻokomo waha bele i nā auwai e haʻalele ana i ka plenum.ʻO kekahi o nā pōmaikaʻi o ka plug fan ʻo ia ka hoʻomaikaʻi ʻana i ka hana acoustic, ʻo ia ka hopena ma muli o ke kani ʻana o ke kani i loko o ka plenum a me ka nele o nā ala 'ʻike pololei' mai ka impeller i ka waha o ka ductwork.E hilina'i nui ana ka pono ma ka wahi o ka pe'a i loko o ka plenum a me ka pilina o ka pe'a i kona puka - ke ho'ohana 'ia nei ka plenum e ho'ololi i ka ikehu kinetic i ka lewa a no laila e ho'onui ai i ke kaomi pa'a.ʻO ka hana ʻokoʻa nui a me nā kūpaʻa ʻokoʻa o ka hana e hilinaʻi ʻia ma ke ʻano o ka impeller - ua hoʻohana ʻia nā impeller kahe i hui ʻia (e hāʻawi ana i ka hui ʻana o ka radial a me ke kahe axial) no ka lanakila ʻana i nā pilikia kahe ma muli o ke ʻano hoʻoheheʻe ea radial ikaika i hana ʻia me ka hoʻohana ʻana i nā impellers centrifugal maʻalahi.

No nā ʻāpana liʻiliʻi, hoʻohui pinepine ʻia kā lākou hoʻolālā paʻa ma o ka hoʻohana ʻana i nā kaʻa EC hiki ke hoʻokele maʻalahi.

Nā pā axial

I loko o nā pā kahe axial, hele ka ea i loko o ka peʻahi e like me ke koʻi o ka rotation (e like me ka mea i hōʻike ʻia ma ka peʻahi axial tube maʻalahi o ke Kiʻi 6) - hoʻopuka ʻia ke kaomi e ka aerodynamic lift (e like me ka ʻēheu mokulele).Hiki ke hoʻohālikelike ʻia kēia mau mea, ke kumu kūʻai haʻahaʻa a me ka māmā, kūpono loa i ka hoʻoneʻe ʻana i ka ea me nā puʻe haʻahaʻa haʻahaʻa, no laila e hoʻohana pinepine ʻia i nā ʻōnaehana unuhi kahi haʻahaʻa haʻahaʻa o ke kaomi ma mua o nā ʻōnaehana hoʻolako - ʻo ka hoʻolako maʻamau me ka hāʻule puʻe o nā ea a pau. nā ʻāpana i loko o ka ʻāpana mālama ea.Ke haʻalele ka ea i kahi peʻahi axial maʻalahi, e wili ʻia ma muli o ka ʻōwili i hāʻawi ʻia ma ka lewa i ka wā e hele ai i loko o ka impeller - hiki ke hoʻomaikaʻi nui ʻia ka hana o ka peʻahi e nā mea alakaʻi alakaʻi i lalo e hoʻihoʻi i ka wili, e like me ka vane axial fan i hōʻike ʻia ma ke Kiʻi 7. Hoʻopili ʻia ka maikaʻi o ka peʻahi axial e ke ʻano o ka maka, ka mamao ma waena o ka piko o ka lau a me ka hihia a puni, a me ka hoʻihoʻi ʻana i ka swirl.Hiki ke ho'ololi 'ia ka pitch o ka lau no ka ho'ololi pono 'ana i ka puka o ka pe'ahi.Ma ka hoʻohuli ʻana i ka hoʻololi ʻana o nā mea pā axial, hiki ke hoʻohuli ʻia ke kahe o ka ea - ʻoiai e hoʻolālā ʻia ka peʻahi e hana ma ke kuhikuhi kumu.

Kiʻi 6: He paipu axial flow fan

ʻO ka pihi hiʻohiʻona no nā mea pā axial he ʻāina hale kūʻai hiki ke hoʻolilo iā lākou i kūpono ʻole no nā ʻōnaehana me kahi ākea ākea o nā kūlana hana, ʻoiai ua loaʻa iā lākou ka pōmaikaʻi o kahi ʻano mana overloading.

Kiʻi 7: He peʻahi vane axial flow

Hiki i nā mea pā axial Vane ke ʻoi aku ka maikaʻi e like me nā pā centrifugal curved backward, a hiki iā lākou ke hana i nā kahe kiʻekiʻe ma nā kaomi kūpono (maʻamau ma kahi o 2kPa), ʻoiai lākou e hana hou i ka walaʻau.

ʻO ka peʻahi kahe hui ʻia kahi hoʻomohala ʻana o ka peʻahi axial a, e like me ka hōʻike ʻana ma ke Kiʻi 8, he impeller ʻano conical kahi e huki ʻia ai ka ea ma o nā kahawai e hoʻonui ana a laila hele axially ma o nā vanes alakaʻi pololei.Hiki i ka hana hui ke hana i ke kaomi ʻoi aku ka kiʻekiʻe ma mua o ka hiki me nā mea pā kahe axial.Hiki ke like ka pono a me ka leo me ko ka piko centrifugal fan.

Kiʻi 8: Peʻahi inline kahe hui ʻia

ʻO ka hoʻokomoʻana i ka peʻahi

ʻO ka hoʻāʻo ʻana e hāʻawi i ka hoʻonā kūpono o ka peʻahi hiki ke hoʻohaʻahaʻa ʻia e ka pilina ma waena o ka peʻa a me nā ala hoʻoheheʻe kūloko no ka ea.

Ka manawa hoʻouna: Jan-07-2022