METHOD OF CONTROLLING CONCENTRATION OF CARBON DIOXIDE IN AIR INSIDE GREENHOUSE AND DEVICE FOR CARRYING OUT SAME Russian patent published in 1995 - IPC

FIELD: agriculture, particularly, agricultural engineering. SUBSTANCE: this method prescribes dressing greenhouse plants with carbon dioxide with ventilating plants at preset blow-out rate, regulating blow-out rate and concentration of gaseous mixture according to temperature, moisture content, intensity and time of radiation. Claimed device additionally includes mode selector unit connected to programmer, dynamic head and illumination intensity transducers, four threshold members, AND element, OR element, five comparison elements, and controller , all combined with prior art temperature and moisture content sensors, gas analyzer, sources of radiation and carbon dioxide, fan and actuating units allow higher intensity and cropping yield with due regard to temperature, humidity, intensity and duration of radiation of plants in optimum blow-off conditions and at optimal concentration of carbon dioxide contained in admixture. EFFECT: high yield. 2 cl, 1 dwg