US5295355A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-bypass pulse tube refrigerator
Assignee: Technical Institute of Physics and Chemistry
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Filing: 1992-12-29
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Granted: 1994-03-22
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Expires: 2012-12-29
Abstract
Abstract A multi-bypass pulse tube refrigerator comprising a pressure wave generator, a regenerator, a heat exchanger of cold ends (cold finger), a pulse tube, an orifice means and a reservoir volume, connecting in serial. Matrix material made of material of high heat capacity is packed in the regenerator. Rectifying means are arranged at the ends of the pulse tube. The outlet of the pressure wave generator is connected with the hot end of the regenerator. The connection between the cold ends of the regenerator and the pulse tube forms the heat exchanger of cold ends. The reservoir volume is connected with the hot end of the pulse tube through the orifice means. Resistance means are properly arranged in the pulse tube, so as to for gas to pass through the pulse tube uniformly and smoothly. At least one bypass with a throttling means is provided to connect the regenerator and the pulse tube. The refrigerator provided by the invention has a lower refrigeration temperature, high refrigeration capacity and improved refrigeration efficiency.
Inventors
- 👤 Yuan Zhou
- 👤 Junjie Wang
- 👤 Wenxiu Zhu
- 👤 Jinghui Cai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:30
CPC Classifications
F; F25; F25B; F25B9/00; F25B9/14; F25B9/145; F25B2309/00; F25B2309/14; F25B2309/1406; F25B2309/1408; F25B2309/1413; F25B2309/1414; F25B2309/1415; F25B2309/1424; F25B2309/14241
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
164 words
A multi-bypass pulse tube refrigerator comprising a pressure wave generator, a regenerator, a heat exchanger of cold ends (cold finger), a pulse tube, an orifice means and a reservoir volume, connecting in serial; matrix material made of material of high heat capacity is packed in the regenerator; rectifying means are arranged at the ends of the pulse tube; the outlet of the pressure wave generator is connected with the hot end of the regenerator; the connection between the cold ends of the regenerator and the pulse tube forms the heat exchanger of cold ends; the reservoir volume is connected with the hot end of the pulse tube through the orifice means; wherein, resistance means are properly arranged in the pulse tube, so as to for gas to pass through the pulse tube uniformly and smoothly; at least one bypass with a throttling means is provided to connect the regenerator and the pulse tube at the middle portions of the regenerator and the pulse tube.
Claim 2
Dependent Claim
164 words
A multi-bypass pulse tube refrigerator comprising a pressure wave generator, a regenerator, a heat exchanger of cold ends (cold finger), a pulse tube, an orifice means and a reservoir volume, connecting in serial; matrix material made of material of high heat capacity is packed in the regenerator; rectifying means are arranged at the ends of the pulse tube; the outlet of the pressure wave generator is connected with the hot end of the regenerator; the connection between the cold ends of the regenerator and the pulse tube forms the heat exchanger of cold ends; the reservoir volume is connected with the hot end of the pulse tube through the orifice means; wherein, resistance means are properly arranged in the pulse tube, so as to for gas to pass through the pulse tube uniformly and smoothly; at least one bypass with a throttling means is provided to connect the regenerator and the pulse tube at the middle portions of the regenerator and the pulse tube.
Claim 3
Dependent Claim
35 words
A multi-bypass pulse tube refrigerator according to claim 1, wherein, the resistance means in the pulse tube are arranged at the upper and lower sides of the entrance where a bypass joins the pulse tube.
Claim 4
Dependent Claim
24 words
A multi-bypass pulse tube refrigerator according to claims 1 or 2, wherein the resistance means in the pulse tube are made of porous material.
Claim 5
Dependent Claim
15 words
A multi-bypass pulse tube refrigerator according to claim 3, wherein, the porous material is screen.
Claim 6
Dependent Claim
18 words
A multi-bypass pulse tube refrigerator according to claim 4, wherein the throttling means in the bypasses are valves.
Claim 7
Dependent Claim
19 words
A multi-bypass pulse tube refrigerator according to claim 4, wherein the throttling means in the bypasses are orifice means.
Claim 8
Dependent Claim
19 words
A multi-bypass pulse tube refrigerator according to claim 4, wherein the throttling means in the bypasses are capillary means.
Claim 9
Dependent Claim
20 words
A multi-bypass pulse tube refrigerator according to claims 1 or 2, wherein the throttling means in the bypasses are valves.
Claim 10
Dependent Claim
21 words
A multi-bypass pulse tube refrigerator according to claims 1 or 2, wherein the throttling means in the bypasses are orifice means.
Claim 11
Dependent Claim
21 words
A multi-bypass pulse tube refrigerator according to claims 1 or 2, wherein the throttling means in the bypasses are capillary tubes.
Claim 12
Dependent Claim
21 words
A multi-bypass pulse tube refrigerator according to claims 1 or 2, wherein, the regenerator and the pulse tube are arranged coaxially.
Claim 13
Dependent Claim
32 words
A multi-bypass pulse tube refrigerator according to claim 11, wherein, the pulse tube is co-axially arranged in the regenerator and at least one orifice is formed in the wall of the regenerator.
Claim 14
Dependent Claim
17 words
A multi-bypass pulse tube refrigerator according to claim 12, wherein, the regenerator is made of porous material.
Claim 15
Dependent Claim
33 words
A multi-bypass pulse tube refrigerator according to claim 11, wherein, the pulse tube is co-axially arranged in the regenerator and at least one orifice is formed in the wall of the pulse tube.
Claim 16
Dependent Claim
18 words
A multi-bypass pulse tube refrigerator according to claim 14, wherein, the pulse tube is made of porous material.
Claim 17
Dependent Claim
176 words
A multi-bypass pulse tube refrigerator comprising a pressure wave generator, a regenerator, a heat exchanger of cold ends (cold finger), a pulse tube, an orifice means and a reservoir volume, connecting in serial; matrix material made of material of high heat capacity is packed in the regenerator; rectifying means are arranged at the ends of the pulse tube; the outlet of the pressure wave generator is connected with the hot end of the regenerator; the connection between the cold ends of the regenerator and the pulse tube forms the heat exchanger of cold ends; the reservoir volume is connected with the hot end of the pulse tube through the orifice means; wherein, resistance means are properly arranged in the pulse tube, so as to for gas to pass through the pulse tube uniformly and smoothly; a capillary tube is provided between the regenerator and the pulse tube and connect therebetween to form a bypass; the ends of the capillary tube respectively inserted in the regenerator and the pulse tube at their hot ends, and extend therein.
Claim 18
Dependent Claim
176 words
A multi-bypass pulse tube refrigerator comprising a pressure wave generator, a regenerator, a heat exchanger of cold ends (cold finger), a pulse tube, an orifice means and a reservoir volume, connecting in serial; matrix material made of material of high heat capacity is packed in the regenerator; rectifying means are arranged at the ends of the pulse tube; the outlet of the pressure wave generator is connected with the hot end of the regenerator; the connection between the cold ends of the regenerator and the pulse tube forms the heat exchanger of cold ends; the reservoir volume is connected with the hot end of the pulse tube through the orifice means; wherein, resistance means are properly arranged in the pulse tube, so as to for gas to pass through the pulse tube uniformly and smoothly; a capillary tube is provided between the regenerator and the pulse tube and connect therebetween to form a bypass; the ends of the capillary tube respectively inserted in the regenerator and the pulse tube at their hot ends, and extend therein.
Claim 19
Dependent Claim
30 words
A multi-bypass pulse tube refrigerator according to claims 1 or 2 or 16, wherein, the pressure wave generator is a single piston compressor with the input and output valves removed.
Claim 20
Dependent Claim
30 words
A multi-bypass pulse tube refrigerator according to claims 1 or 2 or 16, wherein, the pressure wave generator is a low and high pressure gas source with gas distributing means.
Claim 21
Dependent Claim
26 words
A multi-bypass pulse tube refrigerator according to claims 1 or 2 or 16, wherein, the regenerator and the pulse tube are metal tubes with thin walls.
Claim 22
Dependent Claim
26 words
A multi-bypass pulse tube refrigerator according to claims 1 or 2 or 16, wherein, the regenerator and the pulse tube are nonmetal tubes with thin walls.
Claim 23
Dependent Claim
27 words
A multi-bypass pulse tube refrigerator according to claims 1 or 2 or 16, wherein, the regenerator and the pulse tube have a cross section of circular shape.
Claim 24
Dependent Claim
27 words
A multi-bypass pulse tube refrigerator according to claims 1 or 2 or 16, wherein, the regenerator and the pulse tube have a cross section of rectangular shape.
Claim 25
Dependent Claim
27 words
A multi-bypass pulse tube refrigerator according to claims 1 or 2 or 16, wherein, the regenerator and the pulse tube have a cross section of triangle shape.
Claim 26
Dependent Claim
26 words
A multi-bypass pulse tube refrigerator according to claims 1 or 2 or 16, wherein, the axes of the regenerator and the pulse tube are straight lines.
Claim 27
Dependent Claim
29 words
A multi-bypass pulse tube refrigerator according to claims 1 or 2 or 16, wherein, the axes of the regenerator and the pulse tube are curved lines in similar shape.
Claim 28
Dependent Claim
29 words
A multi-bypass pulse tube refrigerator according to claims 1 or 2 or 16, wherein, the axes of the regenerator and the pulse tube are coil lines in similar shape.
Claim 29
Dependent Claim
21 words
A multi-bypass pulse tube refrigerator according to claims 1 or 2 or 16, wherein, the medium in the refrigerator is gas.
Claim 30
Dependent Claim
23 words
A multi-bypass pulse tube refrigerator according to claims 1 or 2 or 16, wherein, the medium in the refrigerator is gas-liquid biphase material.
Claim 31
Dependent Claim
21 words
A multi-bypass pulse tube refrigerator according to claims 1 or 2 or 16, wherein, the medium in the refrigerator is liquid.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-03-21 | 1997-09-20 | 1998-03-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-21 | 2001-09-20 | 2002-03-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-21 | 2005-09-20 | 2006-03-22 | $7700.00 | Window Closed / Lapsed |