WO2008154273A2 - Système de refroidissement de compresseur et procédé d'utilisation - Google Patents
Système de refroidissement de compresseur et procédé d'utilisation Download PDFInfo
- Publication number
- WO2008154273A2 WO2008154273A2 PCT/US2008/065873 US2008065873W WO2008154273A2 WO 2008154273 A2 WO2008154273 A2 WO 2008154273A2 US 2008065873 W US2008065873 W US 2008065873W WO 2008154273 A2 WO2008154273 A2 WO 2008154273A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- compressor
- air
- cooling system
- enclosure
- holes
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
- F04B39/06—Cooling; Heating; Prevention of freezing
- F04B39/066—Cooling by ventilation
Definitions
- the field of this invention relates to systems and methods for cooling compact heat generating devices such as air compressors.
- Portable oxygen concentrators are commonly used in the home medical market to treat ambulatory patients with chronic obstructive pulmonary diseases. To make an oxygen concentrator portable, the oxygen concentrator must be as small as possible and weigh as little as possible while delivering sufficient concentrated oxygen gas flow to the ambulatory patient.
- An air compressor is used in an oxygen concentrator to supply high-pressure feed air to a Pressure Swing Adsorption (PSA) Module or concentrator.
- An air compressor generates heat during use and is cooled by a fan cooling system (fan mounted to a dhveshaft of the compressor). The fan moves cooling air over an air compression chamber, thereby cooling that portion of the device that is heated by the compression of the air and by friction. The fan may also be used to cool a motor of the compressor.
- the compressor may be encased in a sound-proof enclosure. The enclosure keeps compressor noise from escaping and allows for the ingress and egress of cooling air.
- the fan cooling system for an air compressor has the limitation that the fan speed is generally limited to the compressor speed, and the pressure and velocity that may be generated by the fan is limited by the diameter of the fan so that small compressors may not be adequately cooled. Furthermore, if the compressor cooling fan is required to force air through a filter, or through a tortuous path for noise abatement, an auxiliary fan is required. An additional electric fan can be used, but these fans may be noisy and/or larger than the compressor.
- an aspect of present invention involves a cooling system and method for a compact heat generating device (e.g., air compressor) that may be used in a portable device such as a portable oxygen concentrator.
- An enclosure surrounds the compressor for noise abatement.
- the enclosure has a number of holes, nozzles, or jet ducts in it located opposite the areas that require cooling. These openings cause jet impingement, which is the basis for this cooling scheme, at selective thermal hot spots.
- a blower sucks air from inside the enclosure and blows it through a tortuous path to a location remote from the compressor housing.
- the negative pressure generated by the blower provides the motive force for the air jets.
- the diameter, shape, and flow rate of the jets are designed to provide for turbulent flow of the cooling air jets.
- the cooling air jets are of non-uniform length and direction, thereby breaking up the sound waves emanating from the compressor.
- a further aspect of the invention involves a compressor cooling system for an air compressor.
- the compressor cooling system includes an air compressor having an external surface; an enclosure for enclosing the air compressor inside the enclosure; an air passage formed on the inside of the enclosure between the enclosure and the external surface of the air compressor; multiple holes in the enclosure; and a negative pressure source coupled to the air passage for drawing air through the multiple holes and into the enclosure for cooling the compressor.
- Another aspect of the invention involves a method of using a compressor cooling system.
- the method includes imparting a negative pressure in the air passage with the negative pressure source, drawing air through the multiple holes and into the enclosure for cooling the compressor; creating turbulent air flow in the air passage with the multiple holes, cooling the compressor and reducing compressor noise; and expelling the air flow from the compressor cooling system with the negative pressure source.
- Figure 1 is a simple schematic of an embodiment of a gas separation device, which is an exemplary system/environment for the compressor cooling system.
- Figure 2 is a simple schematic of an embodiment of a compressor and an embodiment of a compressor cooling system.
- a gas separation device 10 constructed in accordance with an embodiment of the invention will first be described before describing an embodiment of a compressor cooling system 100.
- the gas separation device 10 and the cooling system 100 will be described in conjunction with cooling a compressor; however, in alternative embodiments, the cooling system 100 may be used to cool other compact heat generating devices such as vacuum pumps, internal combustion engines, lasers, electronics, etc.
- the gas separation device 10 may include an air compressor
- the gas separation device 10 is a portable oxygen concentrator weighing in the range of 2-20 pounds.
- An example portable oxygen concentrator system that comprises the gas separation device 10 is shown and described in U.S. Patent 6,691 ,702, which is hereby incorporated by reference herein as though set forth in full.
- the portable oxygen concentrator system 100 and described with reference to Figures 1 -16, and especially Figures 1 , 2, 12, 15, and 16, may be used as the gas separation device 10.
- a feed fluid such as ambient air may be drawn into the compressor 20 and delivered under high pressure to the PSA Module 30.
- the compressor 20 is a combination compressor and vacuum pump/generator.
- the vacuum generator is preferably driven by the same motor as the compressor and is integrated with the compressor.
- the vacuum generator draws exhaust gas from the PSA module 30 to improve the recovery and productivity of the PSA module 30.
- the PSA module 30 separates a desired product fluid (e.g., oxygen) from the feed fluid (e.g., air) and expels exhaust fluid. Characteristics of the product fluid (e.g., flow/purity) may be measured by a measurement mechanism 40. Delivery of the product fluid may be controlled with the flow control mechanism 50.
- a desired product fluid e.g., oxygen
- Characteristics of the product fluid e.g., flow/purity
- Delivery of the product fluid may be controlled with the flow control mechanism 50.
- the compressor cooling system 100 includes a close-fitting plastic enclosure 120 that encloses the compressor 20.
- the space between the outside of the compressor 20 and the inside of the enclosure 120 forms an air gap/passage 125 for cooling air transfer there through.
- the enclosure 120 is substantially air tight and includes multiple (i.e., more than one) holes, nozzles, or jet ducts 130 (hereinafter "holes") that communicate with the air passage 125.
- holes There are no fluid inlets other than the holes 130, which are opposite to the portions of the compressor 20 (e.g., cylinder walls) that need cooling.
- the holes 130 may be of various lengths and/or diameters so that the sound waves emanating from the compressor 20 take different times to reach the outside of the enclosure 120, thereby reducing the noise emitted from the compressor 20.
- the inlet of a centrifugal blower 140 is connected to the air passage 125, thereby maintaining a vacuum in the air passage 125 around the compressor 20, drawing air in through the holes 130.
- the size and flow rate of the air through the holes 130 may be adjusted/varied to keep the flow though the holes 130 and into the air passage 125 turbulent so as to maximize heat transfer from the compressor 20.
- the holes 130 are configured so that the Reynolds number for this air flow though the holes 130 and into the air passage 125 is maintained above approximately 2000 in order to achieve turbulent flow and maximize heat transfer from the compressor 20.
- a tortuous duct 150 is connected to the outlet of the centrifugal blower 140.
- the blower exhaust may be routed through the tortuous duct 150 in order to minimize the noise of the system.
- the compressor cooling system 100 will now be described in use.
- heat is generated by the compressor 20.
- the centrifugal blower 140 draws air out of the air passage 125 in the enclosure and blows it through the tortuous duct 150 to a location remote from the compressor 20.
- the negative pressure generated by the blower 140 provides the motive force at the holes 130 (e.g., holes, nozzles, or jet ducts) for the creation of air jets onto and around opposite sides of the compressor 20 (e.g., cylinder walls) that need cooling.
- the diameter, shape, and configuration of the holes 130 and the flow rate through the system 100 are designed to provide for turbulent flow of cooling air jets in the passage 125.
- This cooling air jet impingement is the basis for cooling the compressor 20 at selective thermal hot spots.
- the cooling air jets are of non-uniform length and direction, thereby breaking up the sound waves emanating from the compressor 20.
- the compressor cooling system 100 allows smaller compressor cooling fans or no compressor cooling fans to be provided in cooling the compressor 20.
- the compressor cooling system 100 also reduces the need for an auxiliary cooling fan. With a smaller compressor cooling fan, the compressor system takes up less space than in the past.
- the turbulent flow in the compressor cooling system 100 breaks up the sound waves emanating from the compressor 20, reducing the noise from the compressor system. Since the cooling fan only adds heat and energy to the exhaust air leaving the compressor enclosure the cooling air delivered to the compressor is cooler than it would be in the case of a fan providing positive pressure to the compressor cooling system.
- the above figures may depict exemplary configurations for the invention, which is done to aid in understanding the features and functionality that can be included in the invention.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
- Compressor (AREA)
Abstract
L'invention concerne un système de refroidissement de compresseur pour compresseur à air. Le système comprend un compresseur à air muni d'une surface externe; d'une enceinte pour enfermer le compresseur à air à l'intérieur de l'enceinte; d'un passage d'air formé à l'intérieur de l'enceinte entre l'enceinte et la surface externe du compresseur à air; de multiples trous dans l'enceinte; et d'une source de pression négative couplée au passage d'air pour tirer l'air à travers les trous multiples et dans l'enceinte pour refroidir le compresseur.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US93367407P | 2007-06-08 | 2007-06-08 | |
US60/933,674 | 2007-06-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2008154273A2 true WO2008154273A2 (fr) | 2008-12-18 |
WO2008154273A3 WO2008154273A3 (fr) | 2009-02-05 |
Family
ID=40094781
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2008/065873 WO2008154273A2 (fr) | 2007-06-08 | 2008-06-05 | Système de refroidissement de compresseur et procédé d'utilisation |
Country Status (3)
Country | Link |
---|---|
US (1) | US20080302516A1 (fr) |
TW (1) | TW200916180A (fr) |
WO (1) | WO2008154273A2 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8821133B2 (en) * | 2011-11-03 | 2014-09-02 | Draeger Medical Systems, Inc. | Transportable medical air compressor |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003246607A (ja) * | 2002-02-22 | 2003-09-02 | Teijin Ltd | 酸素濃縮装置 |
WO2005077824A1 (fr) * | 2004-02-16 | 2005-08-25 | Teijin Pharma Limited | Appareil pour concentrer l’oxygène |
US6949133B2 (en) * | 2002-01-31 | 2005-09-27 | Airsep Corporation | Portable oxygen concentrator |
US7179326B2 (en) * | 2002-03-05 | 2007-02-20 | Teijin Limited | Oxygen concentration apparatus |
Family Cites Families (21)
Publication number | Priority date | Publication date | Assignee | Title |
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US3305665A (en) * | 1959-11-17 | 1967-02-21 | Laing Vortex Inc | Forced circulation electric heater employing cross-flow type fan |
JPS533345B2 (fr) * | 1971-11-16 | 1978-02-06 | ||
US4203302A (en) * | 1978-07-14 | 1980-05-20 | The Laitram Corporation | Floor mounted air conditioner |
US4342573A (en) * | 1979-10-12 | 1982-08-03 | Greene & Kellogg, Incorporated | Compact oxygen concentrator |
US4302224A (en) * | 1979-10-12 | 1981-11-24 | Greene & Kellogg, Inc. | Compact oxygen concentrator |
US4424686A (en) * | 1981-03-09 | 1984-01-10 | The Laitram Corporation | Floor mounted air conditioner |
US4378982A (en) * | 1981-08-28 | 1983-04-05 | Greene & Kellogg, Inc. | Compact oxygen concentrator |
US4511377A (en) * | 1983-11-01 | 1985-04-16 | Greene & Kellogg, Inc. | Apparatus for the production of oxygen |
US4826510A (en) * | 1988-01-13 | 1989-05-02 | The John Bunn Company | Portable low profile DC oxygen concentrator |
US4971609A (en) * | 1990-02-05 | 1990-11-20 | Pawlos Robert A | Portable oxygen concentrator |
US5827358A (en) * | 1996-11-08 | 1998-10-27 | Impact Mst, Incorporation | Rapid cycle pressure swing adsorption oxygen concentration method and apparatus |
US6346139B1 (en) * | 1999-05-12 | 2002-02-12 | Respironics, Inc. | Total delivery oxygen concentration system |
US6389793B1 (en) * | 2000-04-19 | 2002-05-21 | General Electric Company | Combustion turbine cooling media supply system and related method |
AU2003223693A1 (en) * | 2002-04-24 | 2003-11-10 | Airsep Corporation | Reduced noise oxygen concentrator |
US7086841B2 (en) * | 2003-04-22 | 2006-08-08 | R. Conrader Company | Air compressor with inlet control mechanism and automatic inlet control mechanism |
US7156903B2 (en) * | 2003-09-02 | 2007-01-02 | Airsep Corporation | Sound enclosure for portable oxygen concentrators |
WO2005035037A2 (fr) * | 2003-10-07 | 2005-04-21 | Inogen, Inc. | Systeme de fractionnement de gaz portatif |
US20060011065A1 (en) * | 2004-07-19 | 2006-01-19 | Hastings John M | Inlet nozzle for oxygen concentrator |
US7793385B2 (en) * | 2005-01-07 | 2010-09-14 | Bissell Homecare Inc. | Extraction cleaning with air flow drying |
US7368005B2 (en) * | 2005-04-05 | 2008-05-06 | Respironics Oxytec, Inc. | Portable oxygen concentrator |
US7510601B2 (en) * | 2005-12-20 | 2009-03-31 | Air Products And Chemicals, Inc. | Portable medical oxygen concentrator |
-
2008
- 2008-06-05 WO PCT/US2008/065873 patent/WO2008154273A2/fr active Application Filing
- 2008-06-05 US US12/133,628 patent/US20080302516A1/en not_active Abandoned
- 2008-06-05 TW TW097120877A patent/TW200916180A/zh unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6949133B2 (en) * | 2002-01-31 | 2005-09-27 | Airsep Corporation | Portable oxygen concentrator |
JP2003246607A (ja) * | 2002-02-22 | 2003-09-02 | Teijin Ltd | 酸素濃縮装置 |
US7179326B2 (en) * | 2002-03-05 | 2007-02-20 | Teijin Limited | Oxygen concentration apparatus |
WO2005077824A1 (fr) * | 2004-02-16 | 2005-08-25 | Teijin Pharma Limited | Appareil pour concentrer l’oxygène |
Also Published As
Publication number | Publication date |
---|---|
WO2008154273A3 (fr) | 2009-02-05 |
US20080302516A1 (en) | 2008-12-11 |
TW200916180A (en) | 2009-04-16 |
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