Scroll compressor differential pressure control during compressor shutdown transitions

Abstract

A method includes determining a pressure difference across a scroll compressor of a cooling system. The pressure difference is compared to a minimum differential pressure value. Pressure differences across the scroll compressor that are less than the minimum differential pressure value are associated with unloading the scroll compressor. Parameters including a pressure set point value and an absolute minimum pressure value are increased when the pressure difference is less than the minimum differential pressure value. Subsequent to the increasing of the parameters, the parameters are decreased when the pressure difference is greater than a sum of the minimum differential pressure value and a hysteresis value.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Application No. 61 / 765,884, filed February 18, 2013. The entire content of the above application is incorporated herein by reference. technical field [0003] The present disclosure relates to a high efficiency cooling system, and more particularly, to a pressure control system. Background technique [0004] The background description provided herein is for the purpose of generally presenting the context of the disclosure. The work of present-day noted inventors is not admitted, either expressly or implicitly, as prior art to the present disclosure with respect to the work described in this Background section and otherwise not as prior art at the time of filing. [0005] Cooling systems can be used in many different applications requiring cooling fluids. The fluid may be a gas such as air, or a liquid such as water. Example applications are heating ventilation and ...

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Problems solved by technology

This reduces the ability of the tandem group to move the steam, which reduces cooling capacity

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