Air conditioner apparatus with starting control for parallel operated compressors based on high pressure detection.

摘要

An outdoor unit (A) includes at least two compressors (1M, 2M) and an outdoor heat exchanger commonly coupled thereto. An indoor (C1, C2, C3) unit is coupled to the outdoor unit (A) so as to constitute a refrigeration cycle. The indoor unit (C1, C2, C3) includes at least an indoor heat exchanger and means for outputting required capacity data in accordance with an air-conditioning load with respect to the indoor heat exchanger. A pressure detector (46) detects the highpressure-side pressure of the refrigeration cycle. A first control section (50) controls the number of compressors to be driven to be one or two. The first control section (50) sequentially starts the two compressors so as to control the compressors in a parallel operation state when the number of compressors to be driven is controlled to be two. A second control section (50) includes a comparing portion for fetching pressure data from the pressure detector and comparing the pressure data with a reference value after the first compressor (CM1) is started when the two compressors (M1, CM2) are to be sequentially started by the first control section (50), a portion for providing a command for allowing an operation start of the second compressor (CM2) to the first control section (50) when the pressure data is found to be lower than the reference value by the comparing portion, and means for providing a command for inhibiting an operation start of the second compressor (CM2) to the first control section (50) when the pressure data is found to be equal to or higher than the reference value by the comparing portion. <IMAGE>