摘要：The object of research is an improved flexible film resistive electric heater of emitting type (FFREHET) for creating a non-reflector IR dryer and vegetable raw material on the example of Antonovka apples.It is proposed to improve the FFREHET by spraying a resistive element based on current-conducting nichrome paste on a flexible electrical insulating film with additional coating on top and bottom by layers of a flexible electrical insulating film. Also, FFREHET is provided with drainages for connection to the power grid.The spectral-optical properties of the Antonovka apple are determined, namely the acceptable IR regions of its absorbing capacity (2.5...3, 6, 9 and 12...15μm). This confirms the effectiveness of using FFREHET during the drying of plant raw materials. It is confirmed the low inertia of the FFREHET at a temperature of 60oC with the heating duration τ/=87s, which simultaneously corresponds to the constant uniform temperature of the working surface and is characterized by a clear dynamics of operation.Non-reflector VC IR dryer with a vibrating mechanism and a heat exchanger is developed. Improved FFREHET follows the geometric shape of the working chamber of the device, ensuring a reduction in the geometric dimensions and simplicity of device design. According to experimentally obtained kinetics of moisture content for Antonovka apples, the shortest duration of heat treatment is 160s-1 with conservation of BAS and natural color.
关键词：flexible film resistive electric heater;non-reflector IR dryers of plant raw materials;quality of dried semi-finished products
