1. Ngā whakatūpato mō te mahi whakarewa
I te wā e whakarewa ana, me whakahaere te mahi kia rite ki ngā mahi kua whakaritea, ki te kore, ka pāngia te kounga o te whakarewa.
(1) Me ma, me pūwero rānei te mata o ngā hononga paipa e whakarewahia ana. Me maeneene, me porowhita, me kore he pūwero, he kapiti rānei te waha pūwero, ā, kia ōrite te matotoru. Whakakanapahia ngā hononga paipa parahi e whakarewahia ana ki te pepa kirikiri, ā, hei whakamutunga, horoia ki te kakahu maroke. Ki te kore, ka pā ki te rere o te whakarewa me te kounga o te whakarewa.
(2) Whakauruhia ngā paipa parahi hei whakarewa kia taupatupatu tetahi ki tetahi (kia aro ki te rahi), ka whakarārangihia te pokapū o te porowhita.
(3) I te wā e whakarewahia ana, me whakamahana ngā wāhanga whakarewa. Whakamahanahia te wāhanga whakarewa o te paipa parahi ki te mura, ā, ina wera te paipa parahi ki te papura-whero, whakamahia he hiko hiriwa hei whakarewa. Kia tangohia te mura, ka whakawhirinakihia te whakarewa ki te hononga whakarewa, kia rewa ai te whakarewa, kia rere ai ki roto i ngā wāhanga parahi kua whakarewahia. Ka taea e te pāmahana i muri i te whakamahana te whakaata i te pāmahana mā te tae.
(4) He pai ake te whakamahi i te mura kaha mō te whakarewa tere, me te whakapoto i te wā whakarewa kia kore ai e puta he nui rawa o ngā waikura i roto i te paipa. Ka puta he paru me te aukati i te mata o te rere o te hauhautanga nā ngā waikura, ā, ka kino rawa atu ki te pūhiko.
(5) I te wā e whakapiripiri ana, ina kāore anō kia tino totoka te whakapiripiri, kaua rawa e whakangaueue, e wiri rānei i te paipa parahi, ki te kore ka pakaru te wāhanga whakapiripiri, ā, ka turuturu.
(6) Mō te pūnaha whakamatao kua whakakīia ki te R12, kāore e whakaaetia kia whakarewahia me te kore e ringihia te hauhautanga R12, ā, kāore e taea te mahi whakatikatika whakarewa ina turuturu tonu te pūnaha whakamatao, kia kore ai e paitini te hauhautanga R12 nā te mura tuwhera. He paitini te Phosgene ki te tinana tangata.
2. Tikanga whakarewa mō ngā wāhanga rerekē
(1) Te whakarewa i ngā hononga paipa diameter-wāhanga
I te wā e whakarewahia ana ngā paipa parahi he rite te diameter i roto i te pūnaha whakamatao, whakamahia te whakarewa anga. Arā, ka whakawhanuitia te paipa whakarewa ki roto i te waha kapu, i te waha pere rānei, kātahi ka whakauruhia he paipa anō. Ki te poto rawa te whakaurunga, ehara i te mea ka pā ki te kaha me te piripono anake, engari ka rere ngāwari te rere ki roto i te paipa, ka poke, ka ārai rānei; ki te iti rawa te āputa i waenga i ngā paipa o roto, o waho hoki, kāore e taea e te rere te rere ki roto i te mata pupuri, ā, ka taea anake te whakarewa ki waho o te atanga. He tino ngoikore te kaha, ā, ka pakaru, ka turuturu ina pāngia e te wiri, e te kaha piko rānei; ki te nui rawa te āputa e rite ana, ka rere ngāwari te rere ki roto i te paipa, ka poke, ka ārai rānei. I taua wā anō, ka puta te turuturu nā te korenga o te whakakī rere ki roto i te whakarewa, ehara i te mea ko te kounga anake Kāore i te pai, engari he moumou rauemi anō hoki. Nō reira, he mea tino nui te whiriwhiri i te roa whakaurunga me te āputa i waenga i ngā paipa e rua me te tika.
(2) Te whakarewa i te ngongo kapiti me te ngongo parahi
I te wā e whakatika ana i te whakamaroke tātari o te pūnaha whakamatao, me whakapiri te ngongo capillary (ngoipo capillary throttle). Ina whakapirihia te capillary ki te whakamaroke tātari, ki ētahi atu paipa rānei, nā te rerekētanga nui o ngā diameter o ngā paipa e rua, he iti rawa te kaha wera o te capillary, ā, he tino ngāwari te whakanui ake i te matotoru o te kākano o te capillary nā te wera nui, ka pakarukaru, ka ngawari hoki te pakaru. Hei ārai i te wera nui o te capillary, me karo te mura whakarewa hau i te capillary, kia eke ki te pāmahana whakarewa i te wā kotahi me te ngongo matotoru. Ka taea hoki te whakamahi i te topenga whakarewa hei whakapiri i te pepa parahi matotoru ki runga i te ngongo capillary kia nui ake ai te horahanga wera kia kore ai e wera nui.
(3) Te whakarewa i te ngongo kapia me te whakamaroke tātari
Me whakahaere te hohonutanga o te whakaurunga o te pūwero i roto i te 5-15mm tuatahi, ko te pito whakaurunga o te pūwero me te whakamaroke tātari me 5mm mai i te pito o te mata tātari, ā, ko te āputa e rite ana me 0.06~0.15mm. Ko te pito o te pūwero he mea hanga kia rite ki te koki 45° te āhua, he rite ki te hū hōiho, hei ārai i ngā matūriki ke kei noho ki te mata o te pito, ā, ka ārai i te aukati.
Ina rerekē rawa ngā diameter o ngā paipa e rua, ka taea hoki te kuru i te whakamaroke tātari mā te whakamahi i te rawhi paipa, i te vise rānei hei whakawhāiti i te paipa o waho, engari kāore e taea te pēhi (mate) i te capillary o roto. Arā, whakauruhia te ngongo capillary ki roto i te ngongo parahi i te tuatahi, ka pēhi mā te rawhi paipa i te tawhiti o te 10 mm mai i te pito o te ngongo matotoru.
(4) Te whakarewa i te paipa hauhautanga me te paipa compressor
Me 10mm te hohonu o te paipa hauhautanga e whakaurua ana ki roto i te paipa. Mēnā he iti iho i te 10mm, ka ngāwari te neke o te paipa hauhautanga ki waho i te wā e whakamahana ana, ā, ka āraia te pūwero e te rerenga.
3. Te tirotiro i te kounga o te whakarewa
Kia kore ai e turuturu te wāhanga kua whakarewaina, me tirotiro ngā mea e tika ana i muri i te whakarewanga.
(1) Tirohia mēnā he pai te mahi hiri o te whakarewa. I muri i te tāpiri i te hauhautanga, te hauota rānei hei whakau mō tētahi wā, ka taea te whakamātautau ki te wai hopi, ki ētahi atu tikanga rānei.
(2) Ina whakahaerehia te mahi whakamatao me te hauhautanga, kaua e whakaaetia kia pakaru (kia tuitui) te wāhi whakarewa nā te wiri.
(3) Kaua te paipa e āraia nā te mea ka uru mai ngā paru i te wā e whakarewaina ana, kaua hoki e uru ki te makuku nā te mea kāore i te tika te whakahaere.
(4) Ina mahi te pouaka whakamātao me te hauhautanga, me ma te mata o te wāhanga whakarewa, ā, me kore he paru hinu.
Wā tuku: Oketopa-23-2021