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AssigneeLG Electronics Inc.
InventorsMin Ho So, Won Hee Lee, Chang Min Choi, Yoon Jei Hwang, Deok Huh, Cheol Min Kim
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Disclosed is a method for controlling the aperture ratio of a linear expansion valve (LEV) so as to control the flow rate of refrigerant circulating in an air conditioning system. The LEV aperture ratio is controlled to range from the minimum value to the maximum value, which are determined according to the compressor's capacity and the cooling and heating modes. The LEV aperture ratio is controlled also based on the compressor's operating status, the change of the indoor fan's air volume, and whether or not the indoor fan operates. Such LEV control enables refrigerant to always be circulated at a suitable flow rate, improving the cooling and heating efficiencies, and also prevents liquid refrigerant from flowing into the compressor, securing high reliability of the compressor.
A method for controlling a linear expansion valve of an air conditioning system, wherein a refrigerant compression capacity of a compressor is changed according to cooling and heating loads, and an aperture ratio of the linear expansion valve, mounted between an indoor heat exchanger and an outdoor heat exchanger, is controlled in response to the change of the refrigerant compression capacity, the method comprising:
A method for controlling a linear expansion valve of an air conditioning system, wherein when a refrigerant compression capacity of a compressor decreases from a first set value to a second set value, an aperture ratio of the linear expansion valve is controlled to decrease by a first predetermined value from an aperture ratio just before the refrigerant compression capacity decreases, resulting in attainment of a second specific value, whereas, when the refrigerant compression capacity of the compressor increases from the second set value to the first set value, the aperture ratio of the linear expansion valve is controlled to increase by a second predetermined value from an aperture ratio just before the refrigerant compression capacity increases, resulting in attainment of a third specific value.
A method for controlling a linear expansion valve of an air conditioning system, wherein an aperture ratio of the linear expansion valve is controlled according to a cooling load, the method comprising:
A method for controlling a linear expansion valve of an air conditioning system, wherein while operating in a heating mode, the air conditioning system stops an operation of an outdoor fan if outdoor temperature is higher than a predetermined temperature, and
Dependencies are inferred from the claim text.