📑 Table of Contents▼

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 oil-less. The suspension spring can be flexure type or coil type. An oil-free valved linear compressor enables the design of compact heat exchangers.[1] Linear compressors work similarly to a solenoid: by using a spring-loaded piston with an electromagnet connected to AC through a diode. The spring-loaded piston is the only moving part, and it is placed in the center of the electromagnet. During the positive cycle of the AC, the diode allows energy to pass through the electromagnet, generating a magnetic field that moves the piston backwards, compressing the spring, and generating suction. During the negative cycle of the AC, the diode blocks current flow to the electromagnet, letting the spring uncompress, moving the piston forward, and compressing the refrigerant. The compressed refrigerant is then released by a valve.

History

edit

A number of patents for linear compressors powered by free-piston engines were issued in the 20th century, including:

The first market introduction of a linear compressor to compress refrigerant in a refrigerator was in 2001.[3]

Valved linear compressor

edit

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.[4] It is used in cryogenics.[4] Linear compressors are used as they have fewer mechanical losses.[5]

Linear compressors are made by LG and used in LG and Kenmore refrigerators. Linear compressors were also announced by Embraco.[6][7] Compressors of this type have less noise, and are more energy efficient than conventional refrigerator compressors. The Embraco linear compressors are also claimed to be oil-free. In the 2010s and 2020s, multiple lawsuits in the United States alleged that the LG compressors had a high rate of failure or lack of expected cooling. As of 2024, there were settlements[8] and ongoing cases.[9]

See also

edit

References

edit
  1. ^ Liang, Kun (2017). "A review of linear compressors for refrigeration" (PDF). International Journal of Refrigeration. 84: 253–273. doi:10.1016/j.ijrefrig.2017.08.015.
  2. ^ a b c "Espacenet : Original document". Worldwide.espacenet.com. Retrieved 5 November 2017.
  3. ^ "Problems 4.7 - A Home Refrigerator with a Sunpower Linear Compressor". Ohio.edu. Archived from the original on 2025-08-17. Retrieved 5 November 2017.
  4. ^ 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.
  5. ^ "Linear compressor".
  6. ^ "Oil-less linear compressor launched". Cooling Post. 2014-03-20. Retrieved 2024-02-28.
  7. ^ "Embraco claims oil-less compressor breakthrough".
  8. ^ Wroclawski, Daniel (2020-09-17). "LG Settles Class-Action Lawsuit Over Refrigerator Compressors". Consumer Reports. Retrieved 2024-02-28.
  9. ^ Roher, Christine; Johnson, Carolyn (2023-12-19). "People say pricey refrigerator compressors are conking out within a few years, sometimes just months". NBC Los Angeles. Retrieved 2024-02-28.
edit

📚 Artikel Terkait di Wikipedia

Compressor

compressor is a mechanical device that increases the pressure of a gas by reducing its volume. An air compressor is a specific type of gas compressor

Inverter compressor

types of inverter compressors: the standard inverter compressor and the linear inverter compressor. The Smart Inverter Compressor utilizes a “V” inverter

Hydrogen compressor

original on 2011-07-08. Retrieved 2009-10-25. Valved linear compressor Archived 2009-09-03 at the Wayback Machine 2004-Osti Hybrid Compressor-Expander

Reciprocating electric motor

motors are rare but they do have some niche applications, e.g. in linear compressors for cryogenics and as educational toys. Daniel Davis was an early

Embraco

overseas. In 2014, Embraco announced linear compressors which were claimed to be more compact than other compressors and to be oil-free. In 2018, Embraco

Ionic liquid piston compressor

Zemships. Electrochemical hydrogen compressor Guided rotor compressor Hydride compressor Linear compressor Ganzair Compressor Timeline of hydrogen technologies

Free-piston engine

driving a turbine, through driving a linear load such as an air compressor for pneumatic power, or by incorporating a linear alternator directly into the pistons

Electrochemical hydrogen compressor

An electrochemical hydrogen compressor is a hydrogen compressor where hydrogen is supplied to the anode, and compressed hydrogen is collected at the cathode