| 摘要 |
<p>A cryogenic device is disclosed which comprises a cryogenic chamber, temperature measuring means, a liquid cryogen injection zone, a source of heat, and means for controlling, in response to temperature data obtained from the temperature measuring means, the injection of liquid cryogen into the injection zone and the application of heat, to control the temperature in the cryogenic chamber. The device may utilise a second source or a higher temperature gas as the source of heat and may utilise a multilayered plate insulator between the injection sites for cryogen and the cryogenic chamber. The device may also incorporate an overflow monitoring system and/or an automated cryogen filling system.</p> |
