Refrigeration – Automatic control – Refrigeration producer
Reexamination Certificate
2006-04-18
2006-04-18
Norman, Marc (Department: 3744)
Refrigeration
Automatic control
Refrigeration producer
C062S175000, C062S510000, C417S291000, C417S310000
Reexamination Certificate
active
07028495
ABSTRACT:
For a purpose of realizing a refrigerant cycle apparatus capable of exactly detecting a pressure reverse phenomenon caused in a compression element of a compressor of a multistage compression type, in the refrigerant cycle apparatus in which the multistage compression type compressor constitutes a refrigerant circuit, including an electromotive element, and first and second compression elements driven by the electromotive element in an airtight container to suck an intermediate-pressure refrigerant gas compressed by the first compression element into the second compression element and to compress and discharge the refrigerant gas, the apparatus comprising: a sensor for detecting a discharge refrigerant pressure of the first compression element; and a control device into which an output of the sensor is input, the control device detects reverse of the discharge refrigerant pressures of the first and second compression elements based on the discharge refrigerant pressure of the first compression element.
REFERENCES:
patent: 5803716 (1998-09-01), Wallis et al.
patent: 6732542 (2004-05-01), Yamasaki et al.
patent: 6748754 (2004-06-01), Matsumoto et al.
patent: 2004/0165999 (2004-08-01), Tadano et al.
patent: 2-294587 (1990-12-01), None
Ebara Toshiyuki
Kubo Mamoru
Otagaki Kazuhisa
Norman Marc
Sanyo Electric Co,. Ltd.
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