| 摘要 |
In a refrigeration system (10), a multiple compressor system for maintaining the heat output constant while the outside ambient temperature continues to decrease. The present invention comprises a primary compressor (31) and at least one secondary compressor (32). The entire refrigeration system is sized for the primary compressor (31) operating while in the cooling mode. In the heating mode, the primary compressor (31) operates by itself until the outside ambient temperature (60) falls to a temperature within a particular range. Once this temperature range is met, a secondary compressor (32) begins operating in conjunction with the primary compressor (31) such that the mass flow of refrigerant through the system in the heating mode of operation is no greater than that of the primary compressor operating alone in the cooling mode. While the outside temperature continues to decrease, additional secondary compressors may be included to maintain a constant heat output. In the cooling mode, only a single compressor is required to operate the system. Each of the compressors may alternate with any other so that the lives of the compressors are preserved.
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