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. Suspension spring can be flexure type or coil type. Oil-free valved linear compressor allows the use of compact heat exchangers.[1]
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[2]
- To Hugo Junkers, CA245708, published 1924-12-30[3]
- To Raúl Pateras Pescara, US1615133, published 1927-01-18[4]
The first market introduction of a linear compressor to compress refrigerant in a refrigerator was in 2001.[5]
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.[6] It is used in cryogenics.[6]
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
- ^ Liang, Kun (2017). "A review of linear compressors for refrigeration". International Journal of Refrigeration. 84: 253–273. doi:10.1016/j.ijrefrig.2017.08.015.
{{cite journal}}: Cite has empty unknown parameter:|1=(help) - ^ "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.