Scroll compressors with different volume indexes and systems and methods for same
AssigneeBITZER Kuehlmaschinenbau GmbH
InventorsFrancesco Galante, Richard G. Kobor
Life of this patent
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Abstract
A plurality of scroll compressors with different fixed volume indexes are connected in fluid parallel circuit and configured to selectively operate to maximize isentropic efficiency at different condensing temperatures. Different quantities of scroll compressors of different volume indexes may be selected based upon typical climate or geographic location environmental conditions to attempt to maximize efficiency. A controller may selectively operate different combinations of the compressors of different volume indexes bases up load demands and condensing temperature conditions, which may be determined in a variety of ways.
Claims33
A compressor arrangement, comprising:
- a plurality of refrigerant compressors connected in parallel circuit, each refrigerant compressor having a volume index, the plurality of refrigerant compressors including at least a first compressor and a second compressor, wherein each of the first compressor and the second compressor include a single inlet, a single outlet, and a single flowpath extending between the single inlet and the single outlet, and wherein each of the first compressor and the second compressor includes a housing and a respective internal electrical motor to drive a respective compressor body contained within said housing, the first compressor having a different volume index than the second compressor, wherein the volume index of the first compressor and the second compressor is fixed and non-variable, and wherein the plurality of compressors share a common suction line and share a common discharge line, each of the respective compressor bodies of the first and second compressors being driven only by the respective internal electrical motor thereof.
A method of compressing refrigerant, comprising:
- arranging at least two refrigerant compressors in fluid parallel having different built in fixed, non-variable volume indexes, wherein each compressor of the at least two compressors has a single inlet, a single outlet, and a single flowpath extending between the inlet and the outlet, and wherein each of the at least two compressors includes a housing and a respective internal independent electrical motor to drive a respective compressor body contained within said housing, and wherein the plurality of compressors share a common suction line and share a common discharge line, each of the respective compressor bodies of the at least two compressors being driven only by the respective internal independent electrical motor thereof;
- and
- selectively operating the at least two refrigerant compressors based on saturated condensing temperature.
Dependencies are inferred from the claim text.