Title:
CONTROL DEVICE FOR AIR CONDITIONER
Document Type and Number:
Japanese Patent JP3463447
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a control device for air conditioner which prevents a frequent heating high pressure over-rising protective motion from generating at the time of the heating operation, and displays an abnormality when the heating high pressure over-rising protective motion is generated.
SOLUTION: An air conditioner is equipped with a heat pump type refrigeration cycle which is constituted by communicating a compressor 1, a 4-way valve, an outdoor heat-exchanger, a decompressor, and an indoor heat-exchanger, etc., in order, and is constituted so as to perform a heating high pressure over-rising protective motion. In this case, a first operation unit 18 which calculates the difference between a piping temperature and an over-loading temperature, a second operation unit 19 which operates the factor of variation with time the piping temperature, an air volume setting unit 20, a timer 21, a counter 22 for the heating high pressure over-rising protective motion, a frequency memory unit 23, and an abnormality detecting unit 24, are provided. Then, at the time of a heating operation, the air volume of an outdoor fan is controlled by the difference between the time variation factor of the piping temperature and the specified over-loading temperature, and an abnormality of the refrigeration cycle is displayed on a display unit 12 by the number of times of the heating high pressure over-rising protective motion within a specified period of time.
Inventors:
Youichi Sugawara
Application Number:
JP2105096A
Publication Date:
November 05, 2003
Filing Date:
February 07, 1996
Export Citation:
Assignee:
Fujitsu General Limited
International Classes:
F25B13/00; F24F11/02; F25B1/00; (IPC1-7): F25B13/00; F24F11/02; F25B1/00