Cov khoom siv tooj liab siv rau lub tub yees thiab tub yees
Lub tub yees thiab lub khw muag khoom txias siv cov khoom me me, zoo - tsim cov khoom siv tooj liab. Kev xaiv yog tsav los ntawm peb qhov yuav tsum tau ua: lub qhov dej huv thiab qhuav uas yuav tsis kis cov tub yees, cov pob qij txha txhim khu kev qha nyob rau hauv kev vibration thiab thermal cycling, thiab ib lub raj uas nyob twj ywm kom nruj thiab tsis corrode ntawm qhov kub thiab txias ntawm lub system.
Cov ntaub ntawv ib txwm tau ntsib hauv lub tub yees ua haujlwm yog cov pa oxygen-dawb tooj liab tube, C12200 deoxidised siab phosphorus tooj liab tube, C10200 oxygen-dawb tooj liab raj thiab tin-coated (tinned) tooj liab raj rau qis- kev pab kub.
Kev sib xyaw thiab cov khoom ntawm Cov Qib Siab
| Qib | Kev sib xyaw | Cov khoom tseem ceeb | Kev siv lub freezer |
|---|---|---|---|
| Oxygen-dawb tooj liab raj | Tooj liab 99.95% min, tsis txhob txwm deoxidant | Cov conductivity siab heev, zoo ductility thiab weldability, tsis muaj oxygen - bearing inclusions, yog li tsis muaj kev pheej hmoo ntawm embrittlement nyob rau hauv txo cov cua. | Cov kav dej tub yees thiab cov hluav taws xob tseem ceeb uas yuav tsum muaj kev ua haujlwm siab thiab lub tshuab nqus tsev nruj |
| C12200 DHP tooj liab raj | Tooj liab 99.9% min nrog phosphorus residual los ntawm deoxidation | Siab tensile zog thiab thermal conductivity, zoo corrosion kuj, zoo heev brazing cwj pwm | Kev sib txuas cov kav dej, cov kav dej thiab cov brine, cov kav dej khov dav dav |
| C10200 oxygen-dawb tube | Tooj liab 99.95% min, oxygen -dawb yam tsis muaj deoxidant | Kev ua haujlwm txias txias, ua haujlwm siab, tsis muaj hydrogen embrittlement txaus ntshai | Cov cuab yeej thiab cable conduit, semiconductor thiab precision khoom, siab -purity khi-ins |
| Tin-coated tooj liab raj | Copper raj nrog ib tug sib raug zoo tin txheej rau sab nraud | Txhim kho corrosion kuj nyob rau hauv damp thiab me aggressive tej yam kev mob thiab yooj yim soldering | Condenser thiab evaporator raj, qis -kub coils nyob rau hauv cov av ntub los yog ntug hiav txwv kev teeb tsa |
Ob qhov kev qhia meej yog tsim nyog ua, vim tias lawv feem ntau tsis meej pem hauv kev xyaum. Oxygen-dawb tooj liab tsim C10200 yog qhov tsawg kawg nkaus tooj liab cov ntsiab lus ntawm 99.95%, thaum cov pa oxygen- dawb hluav taws xob qib C10100 nqa 99.99% yam tsawg kawg nkaus; Cov neeg muab khoom yuav tsum tau nug txog qhov tseeb tooj liab thiab cov qib oxygen residual thaum qib tseem ceeb. Thib ob, C12200 muaj cov phosphorus residual, uas muaj txiaj ntsig zoo rau brazing tab sis txo qis hluav taws xob thiab thermal conductivity piv rau oxygen-dawb tooj liab, thiab uas txhais tau hais tias lub raj yuav tsum tsis txhob muab tso rau hauv ib qho kev txo qis lossis hydrogen{10}}kev coj tus cwj pwm, vim tias phosphorus -deoxidised tooj liab yog sucrose.
Standards thiab Supply Conditions
Lub tub yees thiab cua txias raj feem ntau raug txiav txim rau ASTM B280 rau seamless tooj liab raj rau cua txias thiab tub yees kev pab cuam, los yog mus rau EN 12735-1 seamless round tooj liab raj rau piping systems nyob rau hauv cov cua txias thiab tub yees. Cov kab dej thiab brine tuaj yeem ua raws li ASTM B88, GB / T 1527 lossis EN 1057, thaum lub raj rau kev pabcuam dav dav yog them los ntawm ASTM B68 thiab ASTM B75. Mechanical zog, phab ntsa thickness thiab tolerances yog tswj los ntawm cov specification rau tus txiav txim temper.
Cov khoom siv tseem ceeb npaum li qib. Tube tub yees yog nkag rau hauv mos annealed temper nyob rau hauv coils rau dabtsi yog khoov ntawm qhov chaw, thiab nyob rau hauv ncaj lengths nyob rau hauv ib tug nyuaj los yog ib nrab hard temper rau risers thiab headers. Tube yuav tsum tuaj nrog capped los yog ntsaws xaus, ntxuav thiab qhuav sab hauv, thiab nws yuav tsum tau muab khaws cia thiab txiav kom lub bore nyob twj ywm tsis muaj swarf, noo noo thiab hmoov av. Rau lub freezer ua hauj lwm qhov seem ntawm cov dej noo thiab cov roj cov ntsiab lus ntawm lub raj yog ib qho tseem ceeb, vim hais tias cov dej nyob rau hauv ib tug refrigerant Circuit Court daim ntawv acid, freezes ntawm expansion ntaus ntawv thiab ua rau tooj liab plating ntawm compressor qhov chaw.
Hom Piping Hom thiab Qhov Loj
| Hom yeeb nkab | Muaj nuj nqi | Cov khoom siv li qub | Feem ntau sab nraud diameters |
|---|---|---|---|
| Cov kav dej tub yees | Nqa cov tub yees ntawm compressor, condenser, expansion device thiab evaporator | Oxygen-dawb lossis C12200 tube, tinned tube nyob rau hauv qhov chaw raug lossis qhov chaw ntub dej | 6 hli, 8 hli, 10 hli thiab qhov sib npaug ntawm qhov ntau thiab tsawg |
| Inlet thiab qhov hluav taws xob cov kav dej | Dej txias thiab dej txias recirculation | C12200 los yog C10200 tube | 15 mm, 22 mm, 28 mm |
| Cov kab hluav taws xob | Energizing thiab interconnecting cables ntawm cov khoom siv | C10200 cev | 10 mm, 12 mm, 15 mm |
| Tswj thiab cov kab capillary | Kev ntsuas qhov siab, ntsuas qhov ntsuas qhov ntsuas qhov ntsuas qhov ntsuas qhov ntsuas kub thiab cov kab tshem tawm | Mos annealed oxygen-dawb tube | Me me bore capillary qhov ntau thiab tsawg |
Txoj kab uas hla ntawm cov yeeb nkab rau cov tub yees kab yog teem los ntawm lub siab poob thiab lub refrigerant tshaj tawm ntawm lub suction, tawm thiab kua sab, tsis yog los ntawm tus cwj pwm; ntawm kev khiav ntev lossis nrog cov tub yees uas ua haujlwm ntawm qhov siab dua, ob qho tib si txoj kab uas hla thiab phab ntsa thickness yuav tsum tau muab xam. Phab ntsa tuab yuav tsum tsim nyog rau qhov tsim siab ntawm cov tub yees siv, thiab rau siab dua - cov tub yees txias lub raj yuav tsum raug txiav txim rau lub sijhawm tsim nyog es tsis yog rau qhov loj me me ib leeg.
Refrigerant Compatibility thiab System Cleanliness
Copper yog sib xws nrog cov tub yees, xws li R410A, R32, R134a, R404A thiab R744, thiab nrog cov ntxhia, polyolester thiab polyvinyl ether lubricants siv nrog lawv. Ob peb lub tub yees tshiab tau muab cais ua cov nplaim taws me me (A2L) lossis flammable (A3), uas cuam tshuam rau kev them nyiaj, qhov cua, kev kuaj pom thiab cov khoom siv hauv chav tsev es tsis yog lub raj tooj liab nws tus kheej, tab sis kev tsim cov kav dej thiab cov txheej txheem brazing tseem yuav tsum tau ua raws li cov khoom siv cov lus qhia.
Kev huv huv yog ib qho teeb meem tseem ceeb tshaj plaws. Braze pob qij txha yuav tsum tau ua nrog ib tug nitrogen ntxuav, siv tooj liab -phosphorus muab tub lim rau tooj liab- mus rau - tooj liab pob qij txha, uas yuav tsum tau tsis muaj flux, thiab cov nyiaj tsim nyog muab tub lim nrog flux rau pob qij txha rau tooj dag los yog hlau. Flux residues yuav tsum tau muab tshem tawm, vim lawv corrosive nyob rau hauv lub kaw Circuit Court. Tom qab kev tsim khoom, cov kav dej yuav tsum raug ntsuas siab, khiav tawm mus rau qhov chaw tsim khoom lub tshuab nqus tsev thiab tuav kom paub meej tias tsis muaj dej noo, ua ntej them nyiaj. Moisture thiab oxidized scale yog ob feem ntau ua rau thaum ntxov compressor tsis ua hauj lwm nyob rau hauv lub freezer installation.
Xaiv thiab Installation Checklist
Thaum xaiv lub raj, paub meej tias qib thiab cov ntsiab lus tooj liab, qhov kub thiab txias ntawm phab ntsa, qhov huv ntawm lub bore, qhov kawg capping thiab daim ntawv pov thawj zeb. Thaum txhim kho, siv dabtsi yog khoov dua li fittings qhov twg los xij, tiv thaiv lub raj los ntawm kev puas tsuaj thiab kev sib cuag nrog cov hlau tsis sib xws uas tuaj yeem ua rau galvanic corrosion, tso cai rau thermal expansion thiab contraction nyob rau hauv ntev khiav, insulate suction kab los tiv thaiv condensation, thiab txhawb coils thiab risers kom tsis txhob qaug zog cov pob qij txha. Rau qis- chav txias txias txias, rwb thaiv tsev thiab vapor sealing yuav tsum ua kom tsis tu ncua, vim tias kev sib xyaw ua ke ntawm cov yeeb nkab txias yog qhov corrosion thiab dej khov- kev pheej hmoo puas tsuaj nrog rau lub zog poob.
FAQ
Q: Lub raj tooj liab twg yuav tsum tau siv rau lub tub yees txias kab?
Rau feem ntau cov kav dej khov, seamless C12200 lossis oxygen -dawb tooj liab raj rau ASTM B280 lossis EN 12735-1 yog qhov tsim nyog. Qhov twg yuav tsum muaj qhov ua tau zoo tshaj plaws lossis kev ua kom huv huv, siv cov pa oxygen -dawb tooj liab raj rau C10200, thiab xav txog cov tin-coated raj nyob rau hauv cov av ntub, ntug hiav txwv dej los yog lwm yam kev sib tsoo me ntsis.
Q: Qhov txawv ntawm C12200 thiab C10200 raj yog dab tsi?
C12200 yog deoxidised nrog phosphorus thiab muaj ib tug me me seem ntawm nws, muab zoo heev brazing cwj pwm nrog ib tug me ntsis txo nyob rau hauv conductivity. C10200 yog cov pa oxygen-dawb yam tsis muaj deoxidant, yog li nws muaj cov khoom siv hluav taws xob ntau dua thiab tsis muaj kev pheej hmoo ntawm hydrogen embrittlement, tab sis nws tsis yog deoxidised ib yam nkaus thiab feem ntau kim dua.
Q: Vim li cas cov tub yees yuav tsum tau purged nrog nitrogen thaum brazing?
Kev tshem tawm nitrogen tsis suav nrog cov pa oxygen los ntawm lub raj kub thiab tiv thaiv kev tsim ntawm tooj liab oxide nplai. Scale particles tso rau hauv Circuit Court tuaj yeem thaiv cov hlab ntsha capillary, ua rau lub rooj zaum valve puas thiab paug cov compressor, yog li purging yog tus qauv coj ua haujlwm rau tub yees.
Q: Vim li cas tinned tooj liab raj siv nyob rau hauv lub freezer tshuab?
Cov tin txheej tiv thaiv sab nrauv tiv thaiv atmospheric corrosion nyob rau hauv ntub dej, ntsev -laden los yog lwm yam nruj heev puag ncig thiab txhim kho solderability. Nws yog ib qho ntawm cov condenser thiab evaporator raj thiab nyob rau hauv qis -kub coils qhov twg condensation thiab ntug hiav txwv huab cua ua rau lub neej ntawm tooj liab liab.
Q: Dab tsi ntawm cov yeeb nkab tooj liab muaj ntau nyob rau hauv lub freezer kav?
Cov kab tub yees feem ntau yog 6 hli, 8 hli thiab 10 hli sab nraud txoj kab uas hla thiab qhov sib npaug ntawm qhov ntau thiab tsawg; cov kab dej thiab dej txias yog feem ntau 15 hli, 22 hli thiab 28 hli; cable conduit feem ntau 10 mm, 12 mm thiab 15 mm. Qhov kawg qhov ntau thiab tsawg yuav tsum tau xam los ntawm lub siab poob thiab lub tub yees tshaj tawm ntawm qhov tseeb system.
Q: Cov pa roj carbon steel fittings puas siv tau nrog lub raj tooj liab?
Lawv tuaj yeem siv tau qhov kev hloov pauv kev sib koom ua ke thiab rwb thaiv tsev tiv thaiv galvanic, tab sis rau cov tub yees circuits tooj liab lossis tooj dag fittings nyiam dua vim lawv tsis txhob cuam tshuam cov hlau sib txawv thiab yooj yim rau braze. Txhua yam steel tivthaiv nyob rau hauv ib tug tooj liab Circuit Court yuav tsum tau hluav taws xob rwb thaiv tsev thiab tiv thaiv ya raws.
