Linear compressor
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A linear compressor is a gas compressor where the piston moves along a linear track to minimize friction and reduce energy loss during conversion of motion. This technology has been successfully used in cryogenic applications which must be oilless.
History
A number of patents for linear compressors powered by free-piston engines were issued in the 20th century, including:
- To Brown, Boveri & Cie, GB191215963, published 1913-10-08[1]
- To Hugo Junkers, CA245708, published 1924-12-30[2]
- To Raúl Pateras Pescara, US1615133, published 1927-01-18[3]
The first market introduction of a linear compressor to compress refrigerant in a refrigerator was in 2001.[4]
Valved linear compressor
The single piston linear compressor uses dynamic counterbalancing, where an auxiliary movable mass is flexibly attached to a movable piston assembly and to the stationary compressor casing using auxiliary mechanical springs with zero vibration export at minimum electrical power and current consumed by the motor.[5] It is used in cryogenics.[5]
Linear compressors are used in LG and Kenmore refrigerators. Compressors of this type have less noise, and are more energy efficient than conventional refrigerator compressors.
See also
- Hydrogen compressor
- Liquid hydrogen
- Timeline of low-temperature technology
- Timeline of hydrogen technologies
References
- ^ "Espacenet : Original document". Worldwide.espacenet.com. Retrieved 5 November 2017.
- ^ "Espacenet : Original document". Worldwide.espacenet.com. Retrieved 5 November 2017.
- ^ "Espacenet : Original document". Worldwide.espacenet.com. Retrieved 5 November 2017.
- ^ "Problems 4.7 - A Home Refrigerator (updated 3/15/13)". Ohio.edu. Retrieved 5 November 2017.
- ^ a b Reed, Jaime; Dadd, Mike; Bailey, Paul; Petach, Michael; Raab, Jeff (2005). "Development of a valved linear compressor for a satellite borne J–T cryocooler". Cryogenics. 45 (7): 496–500. Bibcode:2005Cryo...45..496R. doi:10.1016/j.cryogenics.2005.03.007.