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Title:
CONTROLLER FOR GREENHOUSE
Document Type and Number:
Japanese Patent JP3511684
Kind Code:
B2
Abstract:

PURPOSE: To provide a controller for a greenhouse, equipped with a greenhouse for cultivating plants and a ventilating means, etc., for the greenhouse and capable of reducing the waste in feed of gaseous carbon dioxide.
CONSTITUTION: This controller for a greenhouse 1 is obtained by installing a greenhouse 1 for cultivating plants, a ventilating means 2 for ventilating the greenhouse 1, a ventilation regulating means for regulating the ventilating means 2, a ventilation sensing means for sensing the extent of regulation of the ventilating means 2, a room temperature controlling means for regulating the ventilating means 2 and controlling the room temperature in the greenhouse 1, a room temperature sensor 6 for measuring the temperature in the greenhouse 1, a gaseous carbon dioxide feeding means 4 for feeding the gaseous carbon dioxide to the greenhouse 1, a gaseous carbon dioxide sensor 5 for measuring the gaseous carbon dioxide concentration in the greenhouse 1, a gaseous carbon dioxide concentration regulating means 12 for keeping the gaseous carbon dioxide concentration in the greenhouse 1 constant, an external environment measuring means for measuring the environment outside the greenhouse 1 such as a wind direction sensor 9, a wind velocity sensor 10 and a sensor 11 for quantity of the solar radiation and a reference value correcting means for the gaseous carbon dioxide concentration capable of correcting the control reference value of the gaseous carbon dioxide concentration regulating means 12 based on the results of measurement with the external environment measuring means 9, 10 and 11.


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Inventors:
Takeda, Koji
Nakaminami, Akio
Application Number:
JP20558194A
Publication Date:
March 29, 2004
Filing Date:
August 30, 1994
Export Citation:
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Assignee:
ISEKI & CO LTD
International Classes:
A01G7/02; A01G9/18; A01G9/24; (IPC1-7): A01G9/24; A01G9/18



 
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