EP 2314958 B1 20181121 - METHOD FOR JUDGING AMOUNT OF REFRIGERANT OF AIR CONDITIONER AND AIR CONDITIONER
Title (en)
METHOD FOR JUDGING AMOUNT OF REFRIGERANT OF AIR CONDITIONER AND AIR CONDITIONER
Title (de)
VERFAHREN ZUM SCHÄTZEN DER KÄLTEMITTELMENGE EINER KLIMAANLAGE UND KLIMAANLAGE
Title (fr)
PROCEDE POUR JUGER DE LA QUANTITE D'AGENT FRIGORIGENE DANS UN CLIMATISEUR ET CLIMATISEUR
Publication
Application
Priority
- JP 2009002913 W 20090625
- JP 2008169596 A 20080627
Abstract (en)
[origin: EP2314958A1] It is a problem of the present invention to reduce detection errors by performing control such that a degree of supercooling that becomes an index and a conversion value based on the degree of supercooling become values with which it is easy to determine the adequacy of the quantity of refrigerant. An air conditioning apparatus (1) refrigerant quantity determination method of the present invention is a refrigerant quantity determination method of determining, in an air conditioning apparatus having a refrigerant circuit (10) that includes a heat source unit (2) having a compressor (21), a heat source-side heat exchanger (23), and cooling heat source adjusting means (27), a utilization unit (4) having a utilization-side heat exchanger (41), an expansion mechanism (33), and a liquid refrigerant connection pipe (6) and a gas refrigerant connection pipe (7), with the refrigerant circuit being capable of performing at least cooling operation, the adequacy of the quantity of the refrigerant in the refrigerant circuit, the method comprising storing the compressor frequency, the degree of superheat, and the degree of supercooling in a stable state where the degree of supercooling has been made equal to or greater than a first predetermined value. After the elapse of a predetermined time period, the degree of supercooling of the refrigerant is detected while various controls are performed such that the compressor frequency and the degree of superheat become the stored compressor frequency and degree of superheat, and the detected degree of supercooling is compared with the stored degree of supercooling to determine the adequacy of the quantity of the refrigerant inside the refrigerant circuit.
IPC 8 full level
F25B 49/02 (2006.01); F25B 49/00 (2006.01)
CPC (source: EP US)
F25B 49/005 (2013.01 - EP US); F25B 2313/0313 (2013.01 - EP US); F25B 2313/0315 (2013.01 - EP US); F25B 2500/19 (2013.01 - EP US); F25B 2600/19 (2013.01 - EP US); F25B 2600/21 (2013.01 - EP US); F25B 2700/04 (2013.01 - EP US); F25B 2700/1933 (2013.01 - EP US); F25B 2700/2104 (2013.01 - EP US); F25B 2700/2106 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 2314958 A1 20110427; EP 2314958 A4 20141126; EP 2314958 B1 20181121; AU 2009263640 A1 20091230; AU 2009263640 B2 20120906; CN 102077042 A 20110525; CN 102077042 B 20130417; JP 2010007995 A 20100114; US 2011088414 A1 20110421; WO 2009157200 A1 20091230
DOCDB simple family (application)
EP 09769910 A 20090625; AU 2009263640 A 20090625; CN 200980124809 A 20090625; JP 2008169596 A 20080627; JP 2009002913 W 20090625; US 99973409 A 20090625