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Refrigerant cycle with tandem compressors for multi-level cooling

a technology of compressors and tandem compressors, which is applied in the direction of refrigeration components, mechanical equipment, lighting and heating apparatus, etc., can solve the problems of high cost, inability to use a conventional tandem compressor configuration, and inability to cool at different levels with application of conventional tandem compressor configuration

Inactive Publication Date: 2006-05-04
CARRIER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008] In a disclosed embodiment of this invention, precise control of various sub-sections of the environment can be achieved by utilizing distinct evaporators for each separate area. Each of the evaporators communicates with a separate compressor, while the compressors send compressed refrigerant through a co

Problems solved by technology

However, the cooling at different levels will not work with application of a conventional tandem compressor configuration, because a separate eva

Method used

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  • Refrigerant cycle with tandem compressors for multi-level cooling
  • Refrigerant cycle with tandem compressors for multi-level cooling
  • Refrigerant cycle with tandem compressors for multi-level cooling

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Embodiment Construction

[0014] Referring to FIG. 1, a conventional prior art multi-level (bi-level in this case) system 10 is shown to include two separate circuits 11 to serve subsections of the environment at different temperature levels. Each basic circuit 11 includes a dedicated evaporator 17, condenser 15, compressor 13, expansion device 14, condenser fan 16, evaporator fan 18 and associated piping. As known, each circuit can be controlled to maintain a desired evaporator temperature by various means and thus provide multi-level cooling to the environment. As mentioned above, such conventional approach is cumbersome and requires a significantly higher cost for system manufacturing and operation.

[0015] A refrigerant cycle 20 is illustrated in FIG. 2 having a pair of compressors 22 and 23 that are operating generally as tandem compressors. Optional valves 26 are positioned downstream on a discharge line associated with each of the compressors 22 and 23. These valves can be controlled to prevent backflo...

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Abstract

A tandem compressor cycle is utilized that delivers compressed refrigerant to a common discharge manifold, and then to a common condenser. From the common condenser, the refrigerant passes to a plurality of evaporators, with each of the evaporators being associated with a separate environment to be conditioned. Each of the evaporators is associated with one of the plurality of compressors. By utilizing the common condenser, yet a plurality of evaporators, the ability to independently condition a number of environments is achieved without the requirement of having a dedicated circuit with multiple additional components. Thus, the overall system cost can be greatly reduced. In embodiments, one or more of the plurality of compressors can be provided by a compressor bank having its own plurality of compressors.

Description

BACKGROUND OF THE INVENTION [0001] This application relates to a refrigerant cycle utilizing tandem compressors sharing a common condenser, but having separate evaporators. [0002] Refrigerant cycles are utilized in applications to change the temperature and humidity or otherwise condition the environment. In a standard refrigerant system, a compressor delivers a compressed refrigerant to an outdoor heat exchanger, known as a condenser. From the condenser, the refrigerant passes through an expansion device, and then to an indoor heat exchanger, known as an evaporator. In the evaporator, moisture may be removed from the air, and the temperature of air blown over the evaporator coil is lowered. From the evaporator, the refrigerant returns to the compressor. Of course, basic refrigerant cycles are utilized in combination with many configuration variations and optional features. However, the above provides a brief understanding of the fundamental concept. [0003] In more advanced refriger...

Claims

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Application Information

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IPC IPC(8): F25B1/10F25B1/00
CPCF25B5/00F25B5/02F25B41/04F25B2400/075F25B2400/13F25B2400/22F25B41/20F25B41/24
Inventor LIFSON, ALEXANDERTARAS, MICHAEL F.
Owner CARRIER CORP