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Ultra-low-temperature pulse-tube refrigerator, method for operating pulse-tube refrigerator, and rotary valve

A pulse tube and refrigerator technology, applied in refrigerators, multi-way valves, valve devices, etc., can solve the problems of large drive valve torque, large valve disc force, etc., and achieve the effect of reducing the drive torque

Active Publication Date: 2012-08-22
SUMITOMO HEAVY IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the force acting on the valve disc is large, and the torque required to drive the valve also becomes large.

Method used

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  • Ultra-low-temperature pulse-tube refrigerator, method for operating pulse-tube refrigerator, and rotary valve
  • Ultra-low-temperature pulse-tube refrigerator, method for operating pulse-tube refrigerator, and rotary valve
  • Ultra-low-temperature pulse-tube refrigerator, method for operating pulse-tube refrigerator, and rotary valve

Examples

Experimental program
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Effect test

no. 1 Embodiment

[0048] figure 1 It is a diagram showing the structure of a two-stage four-valve pulse tube refrigerator according to the first embodiment of the present invention. The high-pressure gas Ph flows from the compressor 112 through the first high-pressure piping 115A, the second high-pressure piping 125A, and the third high-pressure piping 135A into the valves V1 , V3 , and V5 . The low-pressure gas P1 returns to the compressor 112 from the valves V2, V4, and V6 through the first low-pressure piping 115B, the second low-pressure piping 125B, and the third low-pressure piping 135B, respectively. The valve V1 controls the airflow flowing into the first regenerator 120 ( R1 ) through the common piping 128 . The valve V2 controls the airflow flowing out from the first regenerator 120 ( R1 ) through the common piping 128 . The valve V3 controls the gas flow flowing into the first-stage pulse tube 130 (PT1) through the common pipe 138 and the first flow path resistance member 160 . Th...

no. 2 Embodiment

[0060] Figure 5 It is a configuration diagram showing a three-stage four-valve type pulse tube refrigerator 200-1 according to the second embodiment of the present invention. The high-pressure gas Ph flows from the compressor 212 through the high-pressure pipes 215A, 225A, 235A, and 245A into the valves V1 , V3 , V5 , and V7 . The low-pressure gas P1 returns to the compressor 212 from the valves V2, V4, V6, and V8 through the low-pressure piping 215B, 225B, 235B, and 245B. The valve V1 controls the airflow flowing into the first regenerator 220 ( R1 ) through the common piping 228 . The valve V2 controls the airflow flowing out from the first regenerator 220 ( R1 ) through the common piping 228 . The valve V3 controls the airflow flowing into the first-stage pulse tube 230 (PT1) through the common pipe 238 and the first flow path resistance member 260 . The valve V4 controls the airflow flowing out from the first-stage pulse tube 230 (PT1) through the common pipe 238 and t...

no. 3 Embodiment

[0068] Figure 8 It is a configuration diagram showing a single-stage four-valve pulse tube refrigerator 300-1 according to a third embodiment of the present invention. The high-pressure gas Ph flows from the compressor 312 through the high-pressure pipes 315A and 325A into the valves V1 and V3. The low-pressure gas P1 is returned to the compressor 312 from the valves V2 and V4 through the low-pressure piping 315B and 325B. The valve V1 controls the airflow flowing into the first regenerator 320 ( R1 ) through the common piping 328 . The valve V2 controls the airflow flowing out from the first regenerator 320 ( R1 ) through the common piping 328 . The valve V3 controls the air flow flowing into the first-stage pulse tube 330 (PT1) through the common pipe 338 and the first flow path resistance member 360 . The valve V4 controls the airflow flowing out from the first-stage pulse tube 330 (PT1) through the common pipe 338 and the first flow path resistance member 360 . Valve ...

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Abstract

The invention discloses a pulse-tube refrigerator which comprises a pulse tube, a regenerator and a rotary valve, wherein the rotary valve comprises a valve seat, a valve disk and a buffer; the valve seat is provided with a sliding surface; while the valve disk is contacted with the sliding surface of the valve seat, the valve disk rotates relative to the valve seat so as to switch a flow path of a refrigerant; and the buffer pushes the valve disk to the valve seat, so that the pressure of buffer gas is lower than the average pressure of a refrigerator system.

Description

technical field [0001] The invention relates to an ultra-low temperature pulse tube refrigerator, an operation method of the pulse tube refrigerator and a rotary valve. Background technique [0002] Pulse tube freezers typically achieve optimum performance in freezing capacity through the use of multi-port rotary valves. This kind of multi-port rotary valve has a valve disc on the valve seat, and usually has more than one port connected to the regenerator in the valve seat, and the gas flows into and out of the regenerator through the same port. [0003] Patent Document 1 discloses a valve disc that is pushed by a buffer pressure (Pb) gas. The valve disk has a space 98 surrounding the valve disk 90 , which is connected to the impulse tube damping volume and includes the housing interior volume of the motor 5 . In this type of rotary valve, one port controls the inflow and outflow of gas to the buffer, and the pressure of the buffer is higher than the average pressure of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B9/14F16K11/074
Inventor 许名尧
Owner SUMITOMO HEAVY IND LTD
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