Air conditioning system and method for controlling operation thereof

摘要

Disclosed are an air conditioning system and a method for controlling an operation thereof, whereby a charging device for charging power to be supplied into the indoor unit is employed, a chargeable control unit is separately employed, or a separate control unit connectable between the indoor unit and an electronic expansion valve is employed, thereby closing the electronic expansion valve even if power supplied into the indoor unit is blocked while controlling opening and closing of the electronic expansion valve, and additionally preventing the electronic expansion valve from being left open, resulting in prevention of an overload of a compressor within an indoor unit.

主权项

1. An air conditioning system comprising:
an outdoor unit having a compressor for distributing a refrigerant; at least one indoor unit connected to the outdoor unit, the at least one indoor unit configured to perform an air conditioning operation; an electronic expansion valve configured to adjust an amount of the refrigerant flowing between the compressor and the at least one indoor unit, wherein the electronic expansion valve is located between the outdoor unit and the at least one indoor unit; and an individual control unit that is located between the at least one indoor unit and the electronic expansion valve and detachably connected to both the at least one indoor unit and the electronic expansion valve; wherein the at least one indoor unit comprises: a power supply unit connected to an external power source to supply power to the at least one indoor unit; an indoor unit control unit configured to generate a valve driving signal to control opening and closing of the electronic expansion valve based on the presence of power supplied from the power supply unit; and an electronic expansion valve driving unit configured to drive the electronic expansion valve based upon the valve driving signal when the individual control unit is not in a connected state with the indoor unit, wherein the individual control unit comprises: a control module configured to detect a state of power received through the power supply unit of the at least one indoor unit and to generate a valve closing signal to close the electronic expansion valve when power supplied from the power supply unit into the at least one indoor unit is blocked during operation of the electronic expansion valve based upon a detection result; a driving module configured to drive the electronic expansion valve based upon the received valve driving signal from the indoor unit when power is supplied from the power supply unit into the at least one indoor unit and the individual control unit is in the connected state with the indoor unit, wherein the driving module closes the electronic expansion valve based upon the valve closing signal; and and auxiliary power supply module configured to supply power to the control module and the driving module when power supplied from the power supply unit into the at least one indoor unit is blocked.