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AssigneeWhirlpool Corporation
InventorsEgerhardt Graf, Rodrigo Link, Fabio Henrique Klein, Cristiano Rafael Schramm
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A piston-and-cylinder assembly, used in cooling sys terns that may include, for example, refrigerators, air-conditioning systems and the like. In order to solve the problems of volumetric loss (or of cooling capacity) of compressors in general, according to the present invention, one foresees configuring the cylinder (11) of the compression chamber in such a manner that the friction will be as low as possible in the phase in which the gas being compresses still does not exert a significant force onto the piston (10) top and will only have a significant effect during the phase in which the gas to be compressed exerts a greater force onto the piston (10), a moment when the volumetric loss impairs the efficiency of the compressor.
A piston-and-cylinder assembly comprising a piston displaceably positioned inside a cylinder,
A cylinder for use on piston-and-cylinder assemblies having a profile with a diameter that is variable and smaller at the end of the stroke, the diameter variation being non-linear, the cylinder being characterized in that the cylinder has a first displacement stretch and a second displacement stretch, the second displacement stretch have a truncated-cone profile, wherein the first displacement stretch has a truncated-cone profile, a cone angle of the second displacement stretch being larger than a cone angle of the first displacement stretch.
Dependencies are inferred from the claim text.