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US 11,300,339 B2Granted
Method for optimizing pressure equalization in refrigeration equipment
AssigneeCarrier Corporation
InventorsCharles A. Cluff, Matthew T. Austin
Life of this patent
Estimating the term…
Abstract
In a method for operating a compressor (22) having an inlet (26) and an outlet (28), the method includes: running the compressor to compress a fluid; shutting down (422) the compressor; determining (420) a condition-dependent threshold restart pressure difference (threshold) across the compressor; relieving the pressure difference to reach the threshold; and, after the threshold is reached, restarting (434) the compressor.
Claims19
A method for operating a compressor (22) having an inlet (26) and an outlet (28), the method comprising:
- running the compressor to compress a fluid;
- shutting down the compressor;
- determining a condition-dependent threshold restart pressure difference (threshold) across the compressor;
- relieving a pressure difference across the compressor to reach the threshold;
- and
- after the threshold is reached, restarting the compressor,
- wherein said condition comprises:
- average operating pressure difference across the compressor during a period of time immediately prior to said shutdown where a higher average pressure difference results in a lower threshold.
5 more elements
A vapor compression system (20) comprising:
- a compressor (22) having an inlet (26) and an outlet (28) along a refrigerant flowpath (24);
- a first heat exchanger (30) downstream of the outlet along the refrigerant flowpath;
- an expansion device (32) downstream of the first heat exchanger along the refrigerant flowpath;
- a second heat exchanger (34) downstream of the expansion device along the refrigerant flowpath;
- a valve (50) having a closed condition and an open condition and positioned so as to relieve a pressure difference between the inlet and the outlet in the open condition;
- means (210, 212) for detecting a pressure difference between the outlet and the inlet;
- and
- a controller (200) configured to:
- determine a condition-dependent threshold restart pressure difference (threshold) across the compressor;
- and
- relieve the pressure difference to reach the threshold,
- wherein said condition comprises:
- average operating pressure difference across the compressor during a period of time immediately prior to said shutdown where a higher average pressure difference results in a lower threshold.
10 more elements
Dependencies are inferred from the claim text.