Pulse tube refrigerator
AssigneeDaido Hoxan Inc.
InventorZhu Shaowei
Life of this patent
Estimating the term…
Abstract
A high pressure valve and low pressure valve are positioned at a hot end of the pulse tube and two direction valves are positioned respectively between the high pressure reservoir, the low pressure reservoir and the pulse tube. In the pulse tube refrigerator wherein the cold is produced by time-phase displacement with orifice, an irreversible loss is caused when the gas passes through the orifice. However, the refrigeration in this invention comprising high and low pressure reservoirs, and open and close valves, all the energy can be converted without loss in adiabatic expansion of the gas in the pulse tube, theoretical efficiency is 100%.
Claims7
A pulse tube refrigerator, comprising:
- a pulse tube;
- gas smoothers located at hot and cold ends of said pulse tube;
- a high pressure inlet gas valve;
- and
- a low pressure outlet gas valve connected to a sum up tube at the cold end of the pulse tube,
- wherein a high pressure reservoir and a low pressure reservoir are positioned at the hot end of the pulse tube and two direction valves are positioned respectively between the high pressure reservoir, the low pressure reservoir and the pulse tube.
A rotary pulse tube refrigerator, comprising:
- a plurality of pulse tubes installed along the circumference of a pulse tube frame;
- a rotatable valve core at a cold end of the pulse tubes;
- a high pressure gas inlet and a low pressure gas outlet on the valve core along the same circumference with the pulse tubes, which connect with the cold end of the pulse tubes,
- wherein a moving seal is maintained between the end of the pulse tube frame and the valve core, and
- wherein a gas reservoir is arranged at a hot end of the pulse tubes.
Dependencies are inferred from the claim text.