| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a thermostatic bath device capable of achieving further efficient set temperature maintenance.SOLUTION: An actual temperature test device 1 of a butterfly valve is equipped with a cooling tank 3 for storing an antifreeze liquid 2 functioning as a coolant, and cooling means 5 for cooling the antifreeze liquid 2 while the butterfly valve 4 is immersed in the antifreeze liquid 2. The cooling means 5 is provided with a storage tank 6 for storing liquid nitrogen, and a solenoid open/close valve 7 for controlling the supply/stop of the liquid nitrogen in the storage tank 6 to the cooling tank 3. The antifreeze liquid 2 is cooled by the liquid nitrogen supplied into the cooling tank 3. Blowout nozzles 11 are disposed at respective diagonal positions in the cooling tank 3, and blow out nitrogen gas into the cooling tank 3.</p> |
