THERMO-ACOUSTIC COOLING DEVICE Russian patent published in 2011 - IPC F25B23/00 

FIELD: machine building.

SUBSTANCE: thermo-acoustic cooling device consists of case with external partial ribbing, of acoustic radiator with built-in excitation device positioned in case, and of cavity made inside case and pressure tight closed with cover. The cover forms a resonator and is filled with working medium in form of helium-krypton mixture under pressure. Further, the device consists of a regenerator built into the resonator in form of parallel plates on ends of which there are set heat exchangers - hot on the side of the acoustic radiator and cold - on the side of the cover. The heat exchangers are made in form of aluminium perforated disks. The resonator cavity has a cylinder shape. Inside the cavity on the side of the cold heat exchanger there is made the second resonator cavity in form of a cylinder pipe with a pressure tight cover and a piston connected to a rod attached to this cover by means of thread facilitating transfer of the piston along axis. The cylinder pipe is located in the central part of the cover of the first resonator on thread facilitating transfer along axis and pressure tightness of the resonance cavity. The cover is also connected with the case by means of the threaded connection with a sealing element facilitating its transfer along axis.

EFFECT: raised efficiency by minimisation of viscous losses and facilitation of phase synchronism of acoustic fluctuations of volume velocity and pressure in regenerator of device.

3 cl, 1 dwg