FROST PREVENTIVE METHOD FOR PADDY FIELD AND ITS DEVICE USING MULTI-HEAD TYPE FROST PREVENTIVE FAN AND LOW PLACE TYPE FROST PREVENTIVE FAN

摘要

PROBLEM TO BE SOLVED: To solve the problem of hindering the spread without sufficiently utilizing warm air, particularly, without exhibiting an advantage of a low place type frost preventive fan since these kinds of frost preventive method and device have both merits and demerits though there are the frost preventive method and the device for sending the warm air and/or air to a tea tree by conventionally using a building column type frost preventive fan for arranging one frost preventive fan on a pole erected in a paddy field or the low place type frost preventive fan for arranging one frost preventive fan on the pole liftably arranged in the paddy field.;SOLUTION: This frost preventive method for the paddy field blows down the air of an inversion layer via a large number of frost preventive fans equipped in a multi-head type frost preventive fan arranged in the paddy field, and prevents frost of farm products of the paddy field via the respective frost preventive fans equipped in the respective low place type frost preventive fans arranged in the paddy field by this blown-down air, and prevents freezing frost damage of the farm products via one multi-head type frost preventive fan and several low place type frost preventive fans. Thus, the frost preventive effect can be exhibited, and the warm air can be effectively used.;COPYRIGHT: (C)2004,JPO