To precisely determine availability of a refrigerant quantity of an air conditioner in response to a difference in an apparatus system constitution of the air conditioner, the pipe length, a pipe diameter and a height difference when installing an apparatus, the connecting number of indoor units and indoor unit capacity, with excellent accuracy even under any environmental condition and an installation condition.
This refrigerating cycle device has an operation control means for operating by switching an ordinary operation mode of controlling the respective apparatuses of the refrigerating cycle device in response to an operation load of using side heat exchangers 7a and 7b and a refrigerant quantity determining operation mode of controlling an orifice means so that an overheating degree of a refrigerant becomes a positive value in an outlet of a heat exchanger being an evaporator among the using side heat exchangers 7a and 7b or a heat source side heat exchanger 3, and also determines the availability of the refrigerant quantity filled in a refrigerant circuit by comparing with a reference value of an operation state quantity in a proper refrigerant quantity prestored in a storage means, by detecting the operation state quantity varying in response to the refrigerant quantity in the refrigerant quantity determining operation mode.
YAMASHITA KOJI
YOSOMIYA MASATO
SHIBA HIROKUNI
| JPH0391664A | 1991-04-17 | |||
| JP2006292213A | 2006-10-26 | |||
| JP2006292211A | 2006-10-26 | |||
| JP2007240108A | 2007-09-20 | |||
| JP2002243276A | 2002-08-28 | |||
| JP2005133958A | 2005-05-26 | |||
| JP2005114184A | 2005-04-28 |
| WO2006090451A1 | 2006-08-31 | |||
| WO2007049372A1 | 2007-05-03 |
Kiyoshi Yasushima
Souji Sasaki
Noboru Omura
Takanashi Norio
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