THERMOELECTRIC SUSPENSION DEVICE FOR GRAIN DRYING TEMPERATURE MEASUREMENT

摘要

FIELD: heating. ^ SUBSTANCE: invention deals with design of bulk material temperature measurement devices in particular intended for grain drying temperature measurement. The proposed thermoelectric suspension device for grain drying temperature measurement is designed to be composed of an input power supply source, temperature sensors contained in a plastic shell and an electronic device interrogating the above sensors. Between the temperature sensors and the plastic shell they are contained in there is a flexible screen of an electrically conductive material inserted, earthed to the device housing. The temperature sensors are galvanically insulated. Between the galvanically insulated earthing contact of the sensors and/or earthing contact of the input power supply source and the housing there is a protective element mounted represented by a varistor providing for drain of electrostatic charge when exceeding the U value and electric circuit galvanic separation in case the potential value should be less than U where 460ëñUëñ480V. ^ EFFECT: prevention of static electricity accumulation of metal structural elements and internal electric circuits which may cause failure of both the electronic temperature sensor contained inside the suspension device and the controller electrically connected to the said sensors. ^ 1 dwg