The invention provides a multi-split air conditioner
system, and an air valve device and an outdoor unit of the multi-split air conditioner
system. The air valve device comprises an air valve, an executer and a controller. The air valve can be arranged at the position of an air supply port of an outdoor draught fan of the multi-split air conditioner
system and is used for adjusting the air supplyarea of the air supply port. The executer is connected with the air valve and used for controlling the air valve to be switched between the opening position and the closing position, and accordingly the air supply area of the air supply port can be adjusted. The controller is connected with the executer, is independent of a
control system of the multi-split air conditioner system and is used for controlling the action of the executer. The air valve device can control the
air volume of the outdoor draught fan, and the situation that under the low-temperature
refrigeration work condition, due tothe too high
air volume of the outdoor draught fan, the
high pressure is relatively low, and consequently the system cannot normally run is avoided; and the actions of the air valve are controlled tobe conducted and not to be conducted through the executer, the actions of the executer are controlled through the controller, the controller is independent of the
control system of the multi-split air conditioner system, accordingly, compatibility for existing systems is good, and
system software upgrading is not needed.