Lub hom phiaj ntawm lub nkoj dewar yog khaws cia thiab thauj cov kua cryogenic. Cov kua dej no feem ntau yog siv rau hauv ntau yam kev tshawb fawb thiab kev lag luam, xws li cryogenics, superconductivity, thiab lub zog cia. Yog li ntawd, cov hlab ntsha dewar yog qhov tseem ceeb rau kev khaws cov kua dej no kom zoo thiab nyab xeeb.
Dewar cov hlab ntsha feem ntau yog ua los ntawm cov hlau tsis muaj hlau lossis txhuas, vim tias cov ntaub ntawv no muaj cov thermal conductivity zoo thiab tuaj yeem tiv taus qhov kub qis uas yuav tsum tau ua rau cov kua dej cryogenic. Cov thawv ntim kuj tseem muaj ob-walled los muab cov rwb thaiv tsev ntxiv thiab tiv thaiv kom tsis txhob muaj cua sov. Cov phab ntsa sab hauv ntawm lub nkoj dewar feem ntau yog ua los ntawm cov khoom siv uas tuaj yeem tiv taus qhov kub thiab txias, xws li stainless hlau lossis txhuas, thaum lub phab ntsa sab nrauv feem ntau yog ua los ntawm cov khoom siv muaj zog, xws li carbon steel lossis stainless hlau.
Dewar cov hlab ntsha tuaj nyob rau hauv ntau yam duab thiab qhov ntau thiab tsawg, nyob ntawm cov ntawv thov tshwj xeeb thiab cov kua cryogenic xav tau. Qee qhov dewars me me kom haum rau hauv chav kuaj lub freezer, thaum lwm tus loj txaus los khaws ntau txhiab litres ntawm cov kua cryogenic.
Txhawm rau kom muaj kev nyab xeeb thiab ua haujlwm tau zoo ntawm cov kua cryogenic, cov hlab ntsha dewar tau nruab nrog ntau yam kev nyab xeeb. Cov yam ntxwv no suav nrog cov cuab yeej siv siab los tiv thaiv kev kub ntxhov hauv lub thawv, thermal sensors los saib xyuas qhov kub hauv lub nkoj dewar, thiab lub tshuab nqus tsev vacuum-breaker li qub kom tswj lub tshuab nqus tsev. Qee qhov dewars kuj muaj cov kab ke hauv nruab nrab kom ntes tau cov dej ntws los yog nchuav.
Ntxiv nrog rau kev khaws cia cov kua cryogenic, cov hlab ntsha dewar tuaj yeem siv los thauj cov kua dej no. Txij li thaum cov kua cryogenic yuav tsum tau khaws cia ntawm qhov kub thiab txias thaum lub sij hawm thauj mus los, dewar cov hlab ntsha muab ib txoj hauv kev ua kom lawv txias. Kev tsim kho ob phab ntsa thiab cov ntaub ntawv rwb thaiv tsev siv hauv cov hlab ntsha dewar pab tswj qhov xav tau qis qis txawm tias thaum thauj mus los.
Kev siv cov hlab ntsha dewar rau khaws cia thiab thauj cov kua cryogenic muaj ntau yam zoo. Cov thawv ntim no muab cov rwb thaiv tsev zoo, tiv thaiv cov kua dej los ntawm cov thermal shocks sab nraud thiab kev hloov siab, thiab xyuas kom muaj kev nyab xeeb kev thauj mus los. Nrog lawv cov yam ntxwv kev nyab xeeb thiab kev tsim ob phab ntsa, cov hlab ntsha dewar yog qhov tseem ceeb rau kev khaws cia thiab thauj cov kua dej cryogenic hauv ntau yam kev tshawb fawb thiab kev lag luam.
