Air conditioner

Abstract

PURPOSE: To permit stabilized operation even when various conditions are different by a method wherein a controller is constituted so that an objective subcooling degree is reduced by a predetermined amount at every time when the condensing temperature of refrigerant in a condenser or the discharging temperature of the refrigerant of a compressor has exceeded a predetermined value. CONSTITUTION: A controller 14 is constituted of a microcomputer and the like so as to operate subcooling degree from a condensing temperature and a refrigerant temperature and control the opening degree of a solenoid valve 5 so that the subcooling degree becomes an objective subcooling degree. The controller 14 reduces the objective subcooling degree by a predetermined amount at every time when the discharging temperature (a temperature detected by a discharging temperature detector 9) of the refrigerant or the condensing temperature (a temperature detected by a condensing temperature detector 12 upon room heating operation and a temperature detected by a condensing temperature detector 10 upon room cooling operation) of the refrigerant has arrived at a predetermined limit value. The objective subcooling degree is reduced by a predetermined amount at every times when the condensing temperature of the refrigerant or the discharging temperature of the refrigerant has exceeded a predetermined value whereby the optimum subcooling degree can be obtained even in an air conditioner having various different conditions, the deterioration of efficiency can be restrained and stabilized operation can be effected. COPYRIGHT: (C)1991,JPO&Japio

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Cited By (3)

    Publication numberPublication dateAssigneeTitle
    EP-2306124-A1April 06, 2011Fujitsu General LimitedHeat pump apparatus
    JP-2011094810-AMay 12, 2011Fujitsu General Ltd, 株式会社富士通ゼネラルHeat pump cycle apparatus
    US-8978402-B2March 17, 2015Fujitsu General LimitedHeat pump apparatus