Variable-speed scroll-type refrigeration compressor
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United States of America Patent
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May 28, 2013
Grant Date -
Apr 22, 2010
app pub date -
May 23, 2008
filing date -
May 29, 2007
priority date (Note) -
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Abstract
The compressor includes a sealed housing defining a suction volume and a compression volume respectively provided on either side of a body contained in the housing, an oil injection circuit supplied with oil from an oil contained in a casing and adapted for injecting oil into the compression volume, the oil injection circuit comprising an electrovalve including a body attached to the wall of the sealed housing and a core movable under the action of a magnetic fluid between a closing position for injecting oil into the compression volume and an opening position preventing or limiting the injection of oil into the compression volume. The compressor includes a control system for moving the core of the electrovalve between the opening and closing positions based on the compressor speed and/or on the cooling gas discharge temperature.
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