MULTICHANNEL NULL-THERMOSTAT Russian patent published in 2008 - IPC H01L35/28 F25B21/02 

FIELD: measuring equipment.

SUBSTANCE: device consists of two-wall cylindrical chamber internal cavity of which is filled with distilled water. Thermoelectric module is cold ended to upper bottom of the chamber and delivers heat from hot end through heating conduit to lower bottom. In the chamber there is float provided of external diameter, rather smaller than that of internal chamber and tapered in vertical section. Each cell of grid made of capron threads and fixed in float internal cavity contains thermostatically controlled thermal junctions of differential thermocouples. Two close-meshed grids are fixed at upper and lower bottoms. Near to lower bottom of internal chamber there is bellow fixed by one end and welded up tightly from other end in such a manner that it represents vessel connected with internal chamber. At lower bottom of internal cylindrical chamber there is mixing device fast-and-tightly fixed with its lower bottom and directly contacting working substance. Elastic rods made of water-unwettable and low heat-conducting material are with one end attached to upper bottom of mixing device, and with another end to upper bottom of internal chamber. Elastic rods are inserted into apertures in float. Float freely moves in vertical plane and is limited in rotation around central axis.

EFFECT: higher accuracy and reliability of design for continuous service.

2 dwg