Title:
ROLLING SYSTEM FOR GREENHOUSE
Document Type and Number:
Japanese Patent JP2960319
Kind Code:
B2
Abstract:
PURPOSE: To provide a method for preventing the crop being raised in the greenhouse from low-temperature/humidity injury due to cool air or low humidity by ensuring the greenhouse not to be excessively opened.
CONSTITUTION: A control unit 17A has plural upper side actuation points set toward the upper side at temperature intervals, successively, with a set temperature as the origin; and, at every control cycle set in advance, rolling driving signals at such time intervals as to be proportional to the number of times of passage of measured temperatures through the upper side actuation points from the lower to upper side are outputted to a motor 12, while unrolling driving signals at such time intervals as to be proportional to the number of times of passage of measured temperatures through the upper side actuation points from the upper to lower side are outputted to the motor 12.
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Inventors:
KAI HIROMI
FUJIKAWA YASUTAKA
FUJIKAWA YASUTAKA
Application Number:
JP28179194A
Publication Date:
October 06, 1999
Filing Date:
November 16, 1994
Export Citation:
Assignee:
SANWA JUGEN
FUJI DENKI KK
FUJI DENKI KK
International Classes:
A01G9/24; (IPC1-7): A01G9/24
Domestic Patent References:
| JP6217650A |
Attorney, Agent or Firm:
Iwao Yamaguchi
Shoji Shinobe
Shoji Shinobe
Previous Patent: THIN WALL SHAPED REFRACTORY STRUCTURE FOR PROTECTION OF WATER-TUBE WALL
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