HEATING METHOD AND HEATING APPARATUS OF GREENHOUSE FOR PROTECTED HORTICULTURE USING HIGH TEMPERATURE TYPE HOT AIR HEATER

摘要

PROBLEM TO BE SOLVED: To provide a method capable of heating a greenhouse of a scale larger than a medium scale having =1,000 m2 of the surface area by using small and few heaters without increasing number of conventional air heaters or using a hot-water heating apparatus. SOLUTION: The method comprises connecting one or more hot air ducts 13 each having a smaller diameter than a conventional one to an underground or overhead installation as a hot air heater 11 and extending the ducts from the heater 11 into a farm field 10 and connecting the terminal parts to a hot air blowing unit 14. A hot air blowing opening 14a is formed to the unit and a blower 15 is installed closely to the unit. The hot air blowing unit 14 and the blower 15 turn on when the hot air heater 11 turns on and the blower 15 sucks the air in the green house from an air intake opening 16 of the unit 14, mixes it with the hot air and blows out from a hot air supply opening 14a in the four directions of the green house to heat the green house. The numbers of the hot air heater 11 and the hot air blowing unit 14 are not limited respectively to one unit but increased depending on the scale of the green house.