Heat driven acoustic orifice type pulse tube cryocooler
View Patent ↗A heat driven acoustic type pulse tube cryocooler has metal knit installed within a driving section cooling a driving gas of an application device using a principle of high temperature superconductivity, and then homogeneously heats the driving gas by way of premixed combustion so that the driving gas generates an acoustic having a predetermined frequency. The orifice installed within a reservoir controls the amount of the driving gas running between the cold reservoir and the pulse tube to constantly maintain a pressure of the cold reservoir. Therefore, the driving gas repeats the process of the compression and expansion centering around the pulse tube, thereby cooling the application device.
1. A heat driven acoustic orifice type pulse tube cryocooler comprising:
a driver ( 10 ) generating a flame radiating heat having a predetermined temperature, homogeneously heating a driving gas, and adiabatically compressing the driving gas so that the driving gas generates an acoustic having a predetermined frequency;
a regenerator ( 20 ) receiving the driving gas output from the driver, and cooling the driving gas;
a pulse tube ( 30 ) receiving the cold driving gas output from the regenerator, adiabatically compressing the driving gas, and generating the driving gas having a high temperature;
a cold reservoir ( 60 ) receiving the high temperature driving gas output from the pulse tube, and adiabatically expanding the driving gas;
a first hot heat exchanger ( 30 ) installed between the generator ( 20 ) and the pulse tube ( 40 ), and exchanging heat with the outside;
a cold heat exchanger installed between the pulse tube ( 40 ) and the cold reservoir ( 60 ), and exchanging heat with the outside; and
an orifice ( 62 ) installed within the cold reservoir, the orifice controlling an amount of the driving gas running between the cold reservoir ( 60 ) and the pulse tube ( 40 ) to constantly maintain a pressure of the cold reservoir;
wherein the driving gas repeats the process of the compression and expansion centering around the pulse tube.
2. The cyrocooler according to claim 1 , wherein the driver includes a burner ( 11 ) into which a mixed gas from the outside is input, a second hot heat exchanger ( 12 ) installed within the burner ( 11 ), and having the driving gas, a heat transferring member ( 12 a ) surrounding the outer surface of the second hot heat exchanger ( 12 ) and installed at a predetermined distance from the inner wall surface of the burner ( 11 ) in order to homogeneously heat the driving gas, and a post treatment heat exchanger ( 13 ) mounted within the second hot heat exchanger ( 12 ) and exposed out of the burner ( 11 ) to be connected with the regenerator ( 20 ), the heat exchanger ( 13 ) controlling a heat capacity transferred to the outside and the driving gas.
3. The cyrocooler according to claim 2 , wherein the mixed gas is a gas mixed with a fuel and an air.
4. The cyrocooler according to claim 2 , wherein the second hot heat exchanger has a cylindrical shape.
5. The cyrocooler according to claim 2 , wherein the heat transferring member has a metal knit shape formed weaving a metal fiber.
6. The cyrocooler according to claim 5 , wherein the metal fiber includes a 20.00% weight of Cr, a 5.00% weight of Al, a 0.10% weight of Y, a 0.30% weight of Si, 0.08% weight of Mn, 0.03% weight of Cu, 0.03% weight of C, and a 74.46% weight of Fe.
7. The cyrocooler according to claim 2 , wherein the pulse tube includes a stack ( 41 ) having thin plates ( 41 a ) piled up parallel to the flowing direction of the driving gas, and a diffuser connected to the cold reservoir ( 60 ) via the cold heat exchanger ( 50 ), the orifice being installed in the connection portion of the cold reservoir.
8. The cyrocooler according to claim 2 , wherein the driving gas is an inert gas.
9. The cyrocooler according to claim 2 , wherein the pulse tube includes a stack ( 41 ) having thin plates ( 41 a ) piled up parallel to the flowing direction of the driving gas, and a diffuser connected to the cold reservoir ( 60 ) via the cold heat exchanger ( 50 ), the orifice being installed in the connection portion of the cold reservoir.
10. The cyrocooler according to claim 1 , wherein the driving gas is an inert gas.
11. The cyrocooler according to claim 1 , wherein the pulse tube includes a stack ( 41 ) having thin plates ( 41 a ) piled up parallel to the flowing direction of the driving gas, and a diffuser connected to the cold reservoir ( 60 ) via the cold heat exchanger ( 50 ), the orifice being installed in the connection portion of the cold reservoir.