EJECTOR-TYPE REFRIGERATION CYCLE
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United States of America Patent
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Issued Date -
Oct 19, 2017
app pub date -
Aug 18, 2015
filing date -
Oct 24, 2014
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Abstract
An ejector-type refrigeration cycle has a compressor, an ejector module, a discharge capacity control section, and a pressure difference determining section. The ejector module has a body providing a gas-liquid separating space. The pressure difference determining section determines whether a low pressure difference operating condition is met. The low pressure difference operating condition is an operating condition in which a pressure difference obtained by subtracting a low-pressure side refrigerant pressure from a high-pressure side refrigerant pressure a predetermined reference pressure difference or lower. The body is provided with an oil return passage that guides a part of a liquid-phase refrigerant to flow from the gas-liquid separating space to a suction side of the compressor. The discharge capacity control section sets a refrigerant discharge capacity to be a predetermined reference discharge capacity or higher when the low pressure difference operating condition is determined to be met.
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