| 摘要 |
A rotary evaporator (1) having a cooler (6), wherein temperature sensors (15, 17) are disposed in the inlet (14) and outlet (16) of the coolant into or out of the cooler (6), and a volume flow rate of the coolant through the cooler (6) is determined. The initiation or termination of condensation in the cooler (6) is derived from an increase or decrease in the difference of the temperatures (X) at the temperature sensors (15, 17). The volume of the condensed distillate (10) is determined from the difference in temperatures (X), and a distillation volume control is performed. By regulating the heating power of the heater (11) and/or the pressure in the system, the loading of the cooler (6) is controlled as a function of the difference in temperatures (X). |
| 主权项 |
1. A method for evaporating a material to be distilled, comprising:
inserting the material to be distilled (3) by at least partial evaporation into a distilling flask (4), the distilling flask being supported rotationally around an axis (2), heating the distilling flask (4) with the material to be distilled (3) via a heater (11), and rotating the distilling flask (4) during the heating process around the axis (2) by a drive (12), guiding vapor (13) forming due to the heating process via a vapor tube (5) encompassing the axis (2) into a cooler (6), the cooler (6) comprising a cooling spiral (8) connected to a cooling circuit to form a flow path (7) for a coolant and with said coolant flowing through it, and condensing the vapor (13) at the cooling spiral (8) and collecting distillate in a distillate flask (9), determining a difference between temperatures of the coolant continuously or in repeated intervals between two positions (14, 16) in the flow path (7) of the coolant, spaced apart from each other by a section (18) of the flow path (7) of the coolant, determining a flow rate, using a flow meter (19), of the coolant from said section (18) continuously or in repeated intervals, wherein a control signal is deduced for the rotary evaporator (1) from a temporal progression of the determined temperature difference and a temporal progression of a determined flow rate, and determining an amount distilled and collected in the distillate flask (9) from the temporal progression of the determined temperature difference and the temporal progression of the determined flow rate and the control signal initiates an output of a value determined for the distilled amount. |
