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Patent Searching and Data


Title:
NUTRITIVE LIQUOR FORMULATION SYSTEM
Document Type and Number:
Japanese Patent JPH0630664
Kind Code:
A
Abstract:

PURPOSE: To provide system designed to efficiently grow plants without suspending the circulation of a nutritive liquor to raising beds and without the need for preparing additional tanks.

CONSTITUTION: The electrical conductivity of a nutritive liquor 8 to be used for plant raising is determined by an electrical conductivity meter 12; when the resultant electrical conductivity value is out of a specified range, an acid- alkali feeder 3, liquid fertilizer feeder 9 and water feeder 4 are selectively actuated respectively for a specified time so that the electrical conductivity value fall within the specified range through a controller 2, and concurrently, electrical conductivity control is performed to check its value at every specified time so that such value does not get out of the specified range; a nutritive liquor is replenished under the above actions.


Inventors:
KIKUCHI HIROSHI
Application Number:
JP18921292A
Publication Date:
February 08, 1994
Filing Date:
July 16, 1992
Export Citation:
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Assignee:
TOSHIBA CORP
International Classes:
G05B11/32; A01G31/00; G05D7/06; G05D11/13; G05D21/00; G05D21/02; (IPC1-7): A01G31/00; G05B11/32; G05D7/06; G05D11/13; G05D21/00; G05D21/02
Attorney, Agent or Firm:
Hidekazu Miyoshi (1 outside)