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(11) | EP 2 006 615 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Multi air-conditioner for simultaneously cooling/heating room air and method for controlling the same |
| (57) A multi air-conditioner (100) for simultaneously cooling/heating room air and a method
for controlling the same are disclosed. The multi air-conditioner for simultaneously
cooling/heating room air includes: a high-pressure gas pipe (410), a low-pressure
gas pipe (430), and a liquid line (420), which are connected between at least one
outdoor unit (200) and a plurality of cooling/heating switching sets (300); a flow-regulating
valve (260) mounted to a bypass pipe (250) connected between the high-pressure gas
pipe (410) and the liquid pipe (420); and a controller (500) for increasing an opening
degree of the flow-regulating valve, if a heating rate is not below a reference rate
during a heating-biased operation and is equal to or less than a required cooling
capacity of an indoor cooling unit during the heating-biased operation.
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