Linear Compressor, Discharge Manifold, Thermal Efficiency
In the design of hermetic compressors for household refrigeration, one important part of the overall efficiency of the machine comes from a good thermal efficiency of the discharge manifold. It is desired that the heat generated during the compression process and accumulated by the gas in the discharge chamber does not return to the compression chamber walls. If not, this heat returns to the pump, reducing volumetric efficiency. Current technologies like on/off and variable velocity compressors, normally make use of metallic parts in the discharge chamber, such parts having high thermal conduction coefficients making them less efficient. Linear compressor technology, together with the non-use of oil allows the improvement of the discharge manifold system, increasing the thermal insulation of the heat from discharge chamber to compression chamber, improving efficiency. This article aims to show the development of this improved discharge system, tests performed, and results obtained.