Refrigeration – Processes – Compressing – condensing and evaporating
Reexamination Certificate
2007-09-25
2007-09-25
Ali, Mohammad M. (Department: 3744)
Refrigeration
Processes
Compressing, condensing and evaporating
C062S126000, C062S130000
Reexamination Certificate
active
11063588
ABSTRACT:
Disclosed herein is a control method for a multiple heat pump. In the control method, when one of multiple indoor units operates in the heating mode and the other indoor units shut down, electronic expansion valves of the shutdown indoor units are controlled to have an opening degree higher than a standard opening degree if an outlet temperature of compressors is higher than a preset temperature, so as to permit a liquid refrigerant, remaining in the shutdown indoor units, to be more readily recovered to the compressors. This eliminates a refrigerant shortage phenomenon of the compressors and prevents deterioration of heating performance as well as reduction of life-span of the compressors.
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Chang Se Dong
Hwang Il Nahm
Lee Yoon Been
Oh Sai Kee
Ali Mohammad M.
LG Electronics Inc.
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