Pambuka kanggo vakum flask

Ketel Termos: Ketel, uga dikenal minangka alabu vakumutawa termos, diciptakake dening ilmuwan Inggris Dewar. Ing taun 1900, dheweke pisanan ngowahi hidrogen sing dikompres dadi hidrogen cair. Iki jenis iki kudu dikempalken ing botol, nanging ing wektu iku ora ana thermos flaskvacuum flask. Dheweke ngembangake dhewe. Dheweke nggunakake cara vakum, yaiku, nggawe botol kaping pindho, nyedhot hawa ing kompartemen lan ngilangi konduksi.

Sing modernlabu vakumIki diciptakake dening fisikawan Inggris Sir James Dewar ing taun 1892. Nalika iku, dheweke lagi nindakake riset babagan gas cair. Kanggo liquefy gas ing suhu kurang, dheweke kudu ngrancang wadhah sing bisa ngisolasi gas saka suhu njaba. Dadi dheweke njaluk teknisi kaca Berg kanggo nyebul wadhah loro-lorone kanggo dheweke. Lapisi wadhah kaca, tutupi tembok njero rong lapisan nganggo merkuri, banjur copot hawa ing antarane rong lapisan kanggo nggawe vakum. Flask vakum jenis iki uga diarani "botol Du", sing bisa njaga suhu cairan ing njero ora owah sajrone wektu tartamtu, ora preduli yen panas utawa adhem.

Since thermos bottles are mainly used to keep hot water warm in the home, they are also called thermos bottles. The structure of the thermos flask is not complicated. There is a double-layer glass bottle in the middle. The two layers are evacuated and plated with silver or aluminum. The vacuum state can avoid heat convection. The glass itself is a poor conductor of heat. The silver-plated glass can radiate the inside of the container outwards. The heat energy is reflected back. In turn, if a cold liquid is stored in the bottle, the bottle prevents heat energy from outside from radiating into the bottle. The stopper of a thermos bottle is usually made of cork or plastic, both of which are not easy to conduct heat. The shell of the thermos bottle is made of bamboo, plastic, iron, aluminum, stainless steel and other materials. The mouth of the thermos bottle has a rubber gasket and the bottom of the bottle has a bowl-shaped rubber seat. These are used to fix the glass bladder to prevent collision with the shell. .

Panggonan paling awon kanggo botol termos kanggo njaga panas lan kadhemen yaiku ing saubengé bottleneck, ing ngendi akeh panas sirkulasi liwat konduksi. Mulane, bottleneck tansah shortened sabisa sak manufaktur. Sing luwih gedhe kapasitas lan cilik cangkeme botol termos, sing luwih apik efek jampel. Ing kahanan normal, minuman kadhemen ing botol bisa disimpen ing 4 ing 12 jam. Kira-kira C. Banyu sing nggodhok watara 60 ℃.

Labu vakums sing raket related kanggo karya lan urip wong. Iki digunakake kanggo nyimpen bahan kimia ing laboratorium, wong digunakake kanggo nyimpen pangan lan ombenan sak piknik lan game bal-balan, kontak botol thermos, etc. Nanging prinsip jampel termal tetep panggah.