EP 1391664 A2 20040225 - Multi-unit air conditioner and method for controlling operation of outdoor unit fan thereof
Title (en)
Multi-unit air conditioner and method for controlling operation of outdoor unit fan thereof
Title (de)
Mehrzonenklimaanlage und Verfahren zur Regelung des Aussenlüfters dieser Klimaanlage
Title (fr)
Système de climatisation à plusieurs unités et procédé de commande du ventilateur d'extérieur d'un tel système
Publication
Application
Priority
KR 20020049750 A 20020822
Abstract (en)
The invention provides a multi-unit air conditioner for independent cooling/heating of rooms, including a system in which, depending on operation conditions, gas refrigerant discharged from a compressor 1 in an outdoor unit A is introduced into a distributor B through a first bypass pipe 11 directly, or via an outdoor unit heat exchanger 2 and a gas-liquid separator 3 with the refrigerant separated into gas and liquid refrigerant indirectly, wherefrom the liquid refrigerant is introduced into the compressor 1 after passed through an electric expansion valve 61a,61b,61c for an indoor unit C which cools the room, an indoor unit heat exchanger 62a,62b,62c, and a distributor B, and the gas refrigerant is introduced into the compressor 1 through a second bypass pipe 12 after passed through an indoor unit heat exchanger 62a,62b,62c and an electric expansion valve 61a,61b,61c for the indoor unit C which heats the room, the distributor B, the gas-liquid separator 3, the outdoor unit electric expansion valve 13a, and the outdoor unit heat exchanger 2. Further, the invention provides a method for controlling operation of an outdoor unit fan 2a in a multi-unit air conditioner including the steps of measuring a temperature of gas-liquid mixture refrigerant discharged from an outdoor unit heat exchanger 2, comparing a measured refrigerant temperature to a preset refrigerant temperature, to detect a gas-liquid mixture ratio, and varying a rotational speed of the outdoor unit fan 2a so that a detected gas-liquid mixture ratio becomes identical to a preset mixture ratio required for an intended operation condition. <IMAGE>
IPC 1-7
IPC 8 full level
F24F 11/02 (2006.01); F25B 13/00 (2006.01); F25B 41/04 (2006.01)
CPC (source: EP US)
F25B 13/00 (2013.01 - EP US); F25B 2313/006 (2013.01 - EP); F25B 2313/007 (2013.01 - EP); F25B 2313/0231 (2013.01 - EP); F25B 2313/02791 (2013.01 - EP); F25B 2313/0294 (2013.01 - EP); F25B 2313/0315 (2013.01 - EP); F25B 2400/23 (2013.01 - EP); F25B 2500/19 (2013.01 - EP)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1391664 A2 20040225; EP 1391664 A3 20040310; EP 1391664 B1 20090114; CN 1224817 C 20051026; CN 1477344 A 20040225; DE 60325811 D1 20090305; JP 2004085179 A 20040318; JP 4391759 B2 20091224; KR 100447202 B1 20040904; KR 20040017601 A 20040227
DOCDB simple family (application)
EP 03009017 A 20030417; CN 03122548 A 20030418; DE 60325811 T 20030417; JP 2003114318 A 20030418; KR 20020049750 A 20020822