Scroll Compressors with Different Volume Indexes and Systems and Methods for Same

a compressor and volume index technology, applied in the field of scroll compressors, can solve the problems of fixed efficiency curve, increased complexity, and typically a substantial increase in cost, and achieve the effect of increasing the efficiency of the compressor system

Inactive Publication Date: 2010-07-29
BITZER KUEHLMASCHINENBAU GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]A general objective of the present invention is to increase efficiency of compressors systems operating in bo

Problems solved by technology

Scroll compressors and/or other types of compressors are positive displacement machines and thereby may have a fixed and therefore non-adjustable “volume index”.
One drawback with employing such fixed positive displacement compressors is that the efficiency curve is fixed relative to operating temperature or to part load operation (e.g. due to condensing

Method used

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  • Scroll Compressors with Different Volume Indexes and Systems and Methods for Same
  • Scroll Compressors with Different Volume Indexes and Systems and Methods for Same
  • Scroll Compressors with Different Volume Indexes and Systems and Methods for Same

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Embodiment Construction

[0028]An embodiment of the present invention has been illustrated in FIG. 1 as at least one bank 10 of compressors of at least two different volume indexes, such as scroll compressors 12, connected in fluid parallel circuit. Each scroll compressor as illustrated in FIG. 1 may be a fixed positive displacement machine that has a non-adjustable built in fixed volume index in that the geometry of scrolls and the compressor chambers that are formed are not adjustable during operation. The bank 10 of scroll compressors may be used in a variety of systems to include air conditioning or chillers, reversible heat pumps, refrigeration units, industrial cooling applications and other such refrigerant circuits (herein cooling and refrigeration and other similar words are used interchangeably and mean the same thing and apply broadly to all such applications indicated).

[0029]Before turning to the details of the parallel circuit bank with different volume indexes, some background about a scroll c...

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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.

Description

[0001]CROSS-REFERENCE TO RELATED PATENT APPLICATIONS[0002]This patent application claims the benefit of U.S. Provisional Patent Application No. 61 / 146,947, filed Jan. 23, 2009, the entire teachings and disclosure of which are incorporated herein by reference thereto.FIELD OF THE INVENTION[0003]The present invention relates to scroll compressors for compressing refrigerant and more particularly to efficiency improvements relative to a bank of two or more compressors that may be implemented in a cooling / refrigeration circuit, and is particularly advantageous for such compressors that have a built-in fixed volume index such as scroll or screw compressors.BACKGROUND OF THE INVENTION[0004]A scroll compressor is a certain type of compressor that is used to compress refrigerant for such applications as refrigeration, air conditioning, heat pumps, industrial cooling and freezer applications, and / or other applications where compressed fluid may be used. Such prior scroll compressors are know...

Claims

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Application Information

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IPC IPC(8): F25B1/04F04C18/02F04C18/08
CPCF04C18/0215F04C23/001F04C23/008F04C28/02F04C28/065F04C29/04F25B2600/0251F04C2240/81F25B1/04F25B49/022F25B2400/06F25B2400/0751F04C2230/604Y02B30/70F04C23/00F04C18/02F25B31/026
Inventor GALANTE, FRANCESCOKOBOR, RICHARD G.
Owner BITZER KUEHLMASCHINENBAU GMBH
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