Compressor's Operating Method of Heat Pump System With Two Compressors

摘要

PURPOSE: A compressor's operating method of heat pump system with two compressors is provided to improve indoor coziness by forcibly operating the compressor regardless of heating and cooling load if the compressor continues to stop over fixed time to reduce stand-by time for restarting of the compressor and rapidly correspond with change of the heating and cooling load. CONSTITUTION: A method includes the steps of: a first step(S2) in which a plurality of compressors work at full capacity by set number of times regardless of heating and cooling load on initial starting of the compressors; a second step(S4) in which some of the compressors are selectively operated depending on the heating and cooling load after all compressors are operated by the set number of times; and a third step(S6) in which the compressors stopped in the second step are additionally started if the compressors selectively started in the second step continue to work over set time. Solidification of leaked oil collected in a tube of the stopped compressor is prevented thereby to reduce time needed for making pressure between an outlet and an inlet of the compressor normal after restarting of the stopped compressor.