WO2011022361A1 - Compresseur - Google Patents

Compresseur Download PDF

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Publication number
WO2011022361A1
WO2011022361A1 PCT/US2010/045705 US2010045705W WO2011022361A1 WO 2011022361 A1 WO2011022361 A1 WO 2011022361A1 US 2010045705 W US2010045705 W US 2010045705W WO 2011022361 A1 WO2011022361 A1 WO 2011022361A1
Authority
WO
WIPO (PCT)
Prior art keywords
cylinder
connecting rod
compressor
rod driving
diameter
Prior art date
Application number
PCT/US2010/045705
Other languages
English (en)
Inventor
Gerold Goertzen
Michael R. Nemcek
Bradley A. Kushner
William A. Null
Original Assignee
Invacare Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Invacare Corporation filed Critical Invacare Corporation
Priority to CA2772244A priority Critical patent/CA2772244A1/fr
Priority to CN201080046643XA priority patent/CN102575520A/zh
Priority to AU2010284357A priority patent/AU2010284357A1/en
Priority to EP10810463A priority patent/EP2467578A1/fr
Publication of WO2011022361A1 publication Critical patent/WO2011022361A1/fr

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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
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/04—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B27/0404—Details, component parts specially adapted for such pumps
    • F04B27/0414—Cams
    • 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
    • F04B27/00—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders
    • F04B27/04—Multi-cylinder pumps specially adapted for elastic fluids and characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B27/0404—Details, component parts specially adapted for such pumps
    • F04B27/0423—Cylinders

Definitions

  • the present application relates to the field of gas compressors.
  • Oxygen has many important medical uses including, for example, assisting patients that have congestive heart failure or other diseases. Supplemental oxygen allows patients to receive more oxygen than is present in the ambient atmosphere.
  • Systems and methods for delivering such oxygen typically include a compressor as a component.
  • U.S. Patent No. 5,988,165 discloses the use of an inline compressor for this purpose
  • U.S. Patent No. 6,923,180 discloses the use of a radial compressor for this purpose
  • U.S. Patent Application Publication Pub. No. 2007/0065301 discloses an in-line compressor for this purpose.
  • U.S. Patent Nos. 5,988,165 and 6,923,180 and U.S. Patent Application Pub. No. 2007/0065301 are incorporated herein by reference in their entirety.
  • a compressor for compressing gas comprises first, second, third and fourth cylinders.
  • the central axis of the first cylinder is generally parallel with a central axis of the second cylinder and a central axis of the third cylinder is generally parallel with the central axis of the fourth cylinder.
  • the axes of the first and second cylinders are oriented at an angle with respect to the axes of the third and fourth cylinders to form a V4 cylinder configuration.
  • First, second third and fourth pistons are disposed in the first, second, third and fourth cylinders.
  • a crankshaft has a main shaft and only two eccentric driving bodies that drive the first, second, third, and fourth pistons.
  • a compressor in one exemplary embodiment, includes a crankshaft having a main shaft that includes a crank axis about which the crankshaft rotates.
  • the crankshaft includes first and second circular driving bodies that extend radially outward from and are eccentric to the crank axis.
  • the first circular connecting rod driving body abuts the second circular connecting rod driving body.
  • Two drive or connecting rods are rotatably connected to each of the first and second circular connecting rod driving bodies, such that rotation of the first and second circular connecting rod bodies about the crank axis reciprocates the four drive or connecting rods.
  • FIG. 1 is a perspective view of a compressor in accordance with an exemplary embodiment
  • FIG. IA is a second perspective view of the compressor shown in Fig. 1, showing a crankshaft and drive rods of the compressor;
  • Fig. IB is a sectional view taken approximately along the plane indicated by lines IB- IB in Fig. 1;
  • FIG. 2 is a sectioned perspective view taken along the plane indicated by lines 2-2 in Fig.1;
  • Fig. 2 A is a sectional view taken along the plane indicated by lines 2-2 in Fig. 1;
  • Fig. 3 is a sectioned perspective view taken along the plane indicated by lines 3-3 in Fig. 1;
  • Fig 3A is a sectional view taken along the plane indicated by lines 3-3 in Fig. 1;
  • Fig. 4 is a perspective view of an assembly of a crankshaft, drive rods, and pistons;
  • Fig. 5 is an exploded perspective view of the assembly shown in Fig. 4;
  • Fig. 6A is a perspective view of a first embodiment of a crankshaft;
  • Fig. 6B is a sectioned perspective view taken along the plane indicated by lines 6B - 6B in Fig. 6A;
  • Fig. 6C is a view taken along lines 6C - 6C in Fig. 6 A;
  • Fig. 6D is a view taken along lines 6D- 6D in Fig. 6C;
  • Fig. 7 A is a perspective view of a second embodiment of a crankshaft;
  • Fig. 7B is a sectioned perspective view taken along the plane indicated by lines 7B - 7B in Fig. 7A;
  • Fig. 7C is a view taken along lines 7C - 7C in Fig. 7 A;
  • Fig. 7D is a view taken along lines 7D- 7D in Fig. 7C;
  • Fig. 8A is a sectioned perspective view taken along lines 2-2 with parts removed to illustrate a cylinder and piston assembly
  • Fig. 8B is the sectioned perspective view of Fig. 8 A with components exploded to illustrate assembly of the piston in the cylinder;
  • Fig. 9 is a sectional view of a first cylinder head assembly that forms part of the compressor of Fig. 1;
  • Fig. 10 is a sectional view of a second cylinder head assembly that forms part of the compressor of Fig. 1;
  • Fig 1 IA is a perspective view of a flow path defining spacer;
  • Fig. 1 IB is a sectioned perspective view taken along lines 1 IB - 1 IB in Fig. HA;
  • FIG. 12 is a schematic illustration of a first exemplary system of the present invention, including a compressor, for providing oxygen-enriched gas for use by a patient; and
  • FIG. 13 is a schematic illustration of a second exemplary system of the present invention, including a compressor, for providing oxygen-enriched gas for use by a patient.
  • Fig. 1 illustrates an exemplary embodiment of a compressor 10.
  • the compressor 10 includes a cylinder assembly 12 and first and second cylinder heads, HOA, 11OB.
  • the cylinder assembly 12 can take a wide variety of different forms.
  • the cylinder assembly includes a base 13, a first sleeve 14A, a second sleeve 14B, a third sleeve 14C, and a fourth sleeve 14D.
  • the first sleeve 14A includes a lower component 2OA and an upper component 30A (Fig. 2)
  • the second sleeve 14B includes a lower component 2OB and an upper component 30B (Fig. 2)
  • the third sleeve 14C includes a lower component 2OC and an upper component 30C (Fig. 3)
  • the fourth sleeve 14D includes a lower component 2OD and an upper component 30D (Fig. 3).
  • the sleeves may take a wide variety of different forms. Any configuration that provides the cylinders can be used. For example, one or more of the cylinders may be formed in only a single component.
  • the first and/or second sleeves and/or the third and fourth sleeves may be a formed from a single piece or block.
  • the lower sleeve components 2OA, 2OB, 2OC, 2OD each have an opening 26A-26D.
  • the openings 26A-26D may take a variety of different forms.
  • One or more of the openings 26A-26D may be configured to act as a guide. Further, one or more of the openings 26A-26D may have the same size as one or more of the other openings 26A-26D.
  • the opening 26A is adjacent and inline with the opening 26B and the guide opening 26C is adjacent and inline with the opening 26D in the illustrated embodiment.
  • an angle ⁇ between the guide openings 26A, 26B and the guide openings 26C, 26D is approximately 90 degrees in the exemplary embodiment.
  • the angle ⁇ may be and angle in the range between 80 and 100 degrees in one exemplary embodiment, such as an angle between 85 and 95 degrees.
  • the upper sleeve components 30A-30D include openings or cylinders 36A-36D.
  • the cylinders 36A-36D may take a variety of different forms.
  • the cylinders 36A-36D are inline with the openings 26A-26D.
  • the angle ⁇ is defined between the cylinders 36A, 36B and the cylinders 36C, 36D.
  • the cylinders 36A-36D are in a substantially "V4" configuration. That is, the central axes 37A, 37B of the cylinders 36A, 36B from a "V" shape with respect to the central axes 37C, 37D of the cylinders 36C, 36D (see Fig. IB).
  • the central axes 37A-37D are each axially offset from one another in the illustrated embodiment.
  • the compressor includes a plurality of pistons 40A-40D that are associated in a one to one relationship with the cylinders 36A-36D.
  • a first piston 4OA is located in the first cylinder 36 A and is supported for sliding (reciprocating) movement in the first cylinder (Fig. 2).
  • a second piston 4OB is located in the second cylinder 36B and is supported for sliding (reciprocating) movement in the second cylinder (Fig. 2).
  • a third piston 40C is located in the third cylinder 36C and is supported for sliding (reciprocating) movement in the third cylinder (Fig. 3).
  • a fourth piston 4OD is located in the fourth cylinder 36D and is supported for sliding (reciprocating) movement in the fourth cylinder (Fig.
  • the cylinders 36A-36D and corresponding pistons 40A-40D are of varying diameters and as a result, the stroke of each piston 40A-40D in its respective cylinder results in a different displacement of gas during the stroke of each piston.
  • the concept of pistons 40A-40D having different strokes from one another may optionally be implemented in the compressor 10. If the strokes of the pistons are different from one another, one or more of the pistons may have the same diameter as one or more other pistons.
  • the first cylinder 36A is the largest in diameter
  • the second cylinder 36B is smaller than the first cylinder
  • the third cylinder 36C is smaller yet
  • the fourth cylinder 36D is the smallest.
  • the compressor may have more than four cylinders or fewer than four cylinders.
  • the upper sleeves 30A-30D are in engagement with lower sleeves 20A-20D.
  • the openings 26A-26D in the lower guide sleeves align with the cylinders 36A-36D in the upper cylinder sleeves.
  • the compressor 10 may include one or more guides that are slideably disposed in the openings 26A-26D. Referring to Figs. 2-4, the compressor includes guides 42B-42D slideably disposed in the openings 26B-26D and a guide is not included in the first opening 26A in the illustrated embodiment. However, guides may be included in all of the openings 26A-26D or any number of guides may be included.
  • the illustrated guides 42B-D are driven by a crankshaft 50 and connecting rods 52B-52D, as described below.
  • the illustrated connecting rods 52B-52D each include a first ring portion 53B-53D and a second ring portion 55B-55D for pivotal connection to the crankshaft 50 and the guides 42B-42D respectively (See Figs. 2 and 3).
  • the first piston 4OA is fixed for movement with the drive or connecting rod 52A.
  • This arrangement is referred to as a "wobble piston," because fixing the piston 4OA to the connecting rod 52A causes some amount of canting or wobbling as the piston 4OA moves in the cylinder 36 A.
  • the first piston 4OA could be pivotally connected to the connecting rod 52 A in a conventional manner. In this embodiment, the first piston 4OA will slide in the cylinder 36A without significant canting or wobbling.
  • the illustrated connecting or drive rod 52A includes a ring portion 53A for rotatable connection to a crankshaft 50.
  • the illustrated guide 42B includes a first portion 43B and a second portion 44B.
  • the first portion 43B of the guide 42B is located in the opening 26B and is supported for sliding (reciprocating) movement in the opening.
  • the second portion 44B of the guide 42B is located in the cylinder 36B and is supported for sliding (reciprocating) movement in the cylinder 36B.
  • the second piston 4OB is separate from the guide 42B and is not attached to the guide.
  • the guide 42B forces the second piston 4OB toward the end surface 32B or head end of the cylinder 36B.
  • gas pressure applied to the cylinder 36B by the first piston 4OA forces the second piston 4OB toward the end surface 34B or crankshaft end of the cylinder.
  • the second piston 4OB remains in contact with the second portion 44B of the guide 42B during both the entire compression stroke and the entire charging stroke.
  • the second piston 4OB is fixed or connected for movement with the guide 42B..
  • the illustrated guide 42C includes a first portion 43C and a second portion 44C.
  • the first portion 43 C of the guide 42C is located in the opening 26C and is supported for sliding (reciprocating) movement in the opening.
  • the second portion 44C of the guide 42C is located in the cylinder 36C and is supported for sliding (reciprocating) movement in the cylinder 36C.
  • the third piston 4OC is separate from the guide 42C and is not attached to the guide, hi this embodiment, during a compression stroke (illustrated by arrow 45 in Fig. 3A), the guide 42C forces the third piston 4OC toward the end surface 32C or head end of the cylinder 36C.
  • gas pressure applied to the cylinder 36C by the second piston 4OB forces the third piston 4OC toward the end surface 34C or crankshaft end of the cylinder, hi an exemplary embodiment, the third piston 4OC remains in contact with the second portion 44C of the guide 42C during both the entire compression stroke and the entire charging stroke.
  • the third piston 4OC is fixed or connected for movement with the guide 42C.
  • the illustrated guide 42D includes a first portion 43D and a second portion 44D.
  • the first portion 43D of the guide 42D is located in the opening 26D and is supported for sliding (reciprocating) movement in the opening.
  • the second portion 44D of the guide 42D is located in the cylinder 36D and is supported for sliding (reciprocating) movement in the cylinder 36D.
  • the fourth piston 4OD is separate from the guide 42D and is not attached to the guide.
  • the guide 42D forces the fourth piston 4OD toward the end surface 32D or head end of the cylinder 36C.
  • gas pressure applied to the cylinder 36D by the third piston 4OC forces the fourth piston 4OD toward the end surface 34D or crankshaft end of the cylinder.
  • the fourth piston 4OD remains in contact with the second portion 44D of the guide 42D during both the entire compression stroke and the entire charging stroke.
  • the fourth piston 4OD is fixed or connected for movement with the guide 42D.
  • crankshaft 50 (described below in detail) is supported for rotation about a crank axis X in first and second bearings 62, 68.
  • the first and second bearings 62, 68 are mounted to the base 13 by first and second and second bearing supports 54 and 56 that are located at either end of the compressor base 13.
  • crankshaft 50 forms part of a drive mechanism 79 of the compressor 10 for driving the pistons 40A-40D for movement in the cylinders 36A-36D.
  • the drive mechanism 79 includes the crankshaft 50, the drive or connecting rods 52A-52D, and the guides 42B-42D.
  • the crankshaft could be connected to the pistons or coupled to the pistons 40A-40D in other manners, for example with connecting or drive rods but not guides.
  • Figs. 6A-6D and 7 A-7D illustrate two embodiments of crankshafts 50.
  • the crankshaft 50 is made from a single piece (or welded together to form a single piece).
  • the crankshaft 50 may be made from multiple pieces that are assembled together and can be disassembled.
  • the crankshaft 50 includes a main shaft 70 having a generally cylindrical configuration defined by a cylindrical outer surface centered on a crank axis X of the compressor 10.
  • the crankshaft 50 rotates about the crank axis X during operation of the compressor 10.
  • the main shaft 70 has externally threaded opposite end portions 78 and 80. Referring to Figs. 1-3, the main shaft 70 is received and supported in the first and second bearings 62 and 68.
  • the crankshaft 50 also includes first and second circular connecting rod driving bodies 84A, 84B that extend radially outward from and are eccentric to the crank axis X.
  • the bodies 84A, 84B are identical to each other, for ease of manufacturing.
  • the bodies 84 A. 84B may have different sizes, for example such that the body 84 A provides a different stroke than body 84B.
  • each of the eccentric bodies 84A, 84B has a cylindrical configuration with each cylinder having a central axis 85A, 85B that is parallel to, but spaced apart from the crank axis X.
  • the central axis 85A and the central axis 85B are positioned away from the crank axis X by the same distance dl and an angle ⁇ of approximately 180 degrees (See Fig. 6D) is formed between the central axis 85A, the crank axis X, and the central axis 85B.
  • the bodies 84A, 84B can be positioned with respect to the crank axis in any manner to achieve desired motions of crank or drive rods 54A-54D that are coupled to the bodies.
  • the main shaft portion 70 that is mounted in the bearings 62, 68 has a diameter that is less than a diameter of the circular connecting rod driving bodies 84 A, 84B.
  • first and second circular connecting rod driving bodies 84A, 84B are the only connecting rod driving bodies of the crankshaft.
  • each of the connecting rod driving bodies drives two connecting or drive rods 54A-54D as will be described in more detail below.
  • any number of connecting rod driving bodies can be included.
  • one connecting rod driving body may be included for each connecting or drive rod.
  • one or more connecting rod driving bodies may drive one connecting or drive rod and one or more connecting rod driving bodies may drive two or more connecting or drive rods.
  • the connecting rod drive bodies 84A, 84B may take a wide variety of different forms. In the embodiments illustrated by Figs.
  • the connecting rod driving bodies 84A, 84B are each formed as a single continuous cylinder.
  • the illustrated continuous cylinders are integrally formed with the main shaft 70.
  • the connecting rod driving bodies are two separately formed continuous cylindrical members that are assembled with the main shaft 70.
  • the two separately formed continuous cylindrical members may be identical or may have different sizes to provide different strokes.
  • the first connecting rod driving body 84A abuts the second connecting rod driving body 84B.
  • the first connecting rod driving body 84A may be integrally formed with the second connecting rod driving body 84B, or the connecting rod driving bodies 84A, 84B may be separate pieces that are fixed together.
  • the first connecting rod driving body 84A is connected to the second connecting rod driving body 84B only at an area of overlap between the first connecting rod driving body and the second connecting rod driving body.
  • the first connecting rod driving body 84A is connected to the second connecting rod driving body 84D by a circular disk 86 disposed between the first connecting rod driving body 84A and the second connecting rod driving body 84B.
  • the connecting rod driving bodies 84 A, 84B may be separate from one another and then fixed to the circular disk 86 or the connecting rod driving body 84A, the circular disk 86, and the connecting rod driving body 84A may be integrally formed.
  • the circular disk 86 is centered on the crank axis X.
  • the illustrated circular disk has an outer circumference 87 that is radially outward of the outer circumferences of both of the first and second connecting rod driving bodies 84A, 84B.
  • a connecting rod 52 A is connected between the first piston 4OA and the first eccentric connecting rod driving body 84A and a connecting rod 52B is connected between the guide 42B (which drives the second piston 40B) and the second eccentric connecting rod driving body 84B.
  • the ring 53 A is disposed around the body 84A to rotatably connect the rod 52 A to the body 84 A.
  • a bearing may be disposed between the ring 53A and the body 84A.
  • the ring 53B is disposed around the body 84B to rotatably connect the rod 52B to the body 84B.
  • a bearing may be disposed between the ring 53B and the body 84B.
  • a pin 9OB extends through the ring portion 55B to pivotally connect the guide 42B the rod 52B.
  • a connecting rod 52C is connected between the guide 42C (which drives the third piston 40C) and the first eccentric connecting rod driving body 84 A and a connecting rod 52D is connected between the guide 42D (which drives the fourth piston 40D) and the second eccentric connecting rod driving body 84B.
  • the ring 53C is disposed around the body 84A to rotatably connect the rod 52C to the body 84A.
  • a bearing may be disposed between the ring 53C and the body 84A.
  • a pin 9OC extends through the ring portion 55C to pivotally connect the guide 42C to the rod 52C.
  • the ring 53D is disposed around the body 84B to rotatably connect the rod 52D to the body 84B.
  • a bearing may be disposed between the ring 53D and the body 84B.
  • a pin 9OD extends through the ring 55D to pivotally connect the guide 42D to the rod 52D.
  • the first eccentric connecting rod driving body 84 A drives both the first and third pistons 4OA, 4OC.
  • the motion of the third piston 4OC follows or lags the motion of the first piston 4OA by rotation of the crankshaft by the angle of the "V" ⁇ (approximately 90 degrees in the illustrated embodiment).
  • the second eccentric connecting rod driving body 84B drives both the second and fourth pistons 4OB, 4OD.
  • a drive pulley (not shown) may be located on one of the end portions 78 of the main shaft 70 to facilitate the application of a drive torque to the main shaft 70, to reciprocate the pistons 40A-40D.
  • the compressor 10 includes a cylinder head assembly 100.
  • the cylinder head assembly 100 includes a first cylinder head HOA and a second cylinder head HOB that is fastened to the cylinder assembly 12 with a plurality of fasteners, hi the illustrated embodiment, the compressor 10 includes fasteners, such as bolts 102 that extend through holes in the cylinder heads HOA, HOB and are threaded into the base 13.
  • fasteners such as bolts 102 that extend through holes in the cylinder heads HOA, HOB and are threaded into the base 13.
  • the bolts 102 are tightened down, the cylinder head 11OA is clamped to the first and second sleeves 14A, 14B and the cylinder head 11OB is clamped to the third and fourth sleeves 14C, 14D.
  • each of the separate pistons 40B-40D can be removed from the cylinders 36B-36D by removing the fasteners 102 (See Fig. 1) that hold the head 11OA and/or HOB down.
  • the second cylinder 36B and piston 4OB is illustrated in Figs. 8A and 8B, but the other pistons and cylinders can be repaired or serviced in the same manner.
  • the head 11OA, the cylinder 36B, and the piston 4OB can be removed and separated as illustrated by Fig. 8B. This arrangement allows the piston 4OB and/or cylinder 36B to be replaced or serviced without requiring the drive or connecting rod 52B to be removed from the crankshaft 50.
  • each cylinder head 11OA, 11OB is formed as one piece from metal, hi the illustrated embodiment, each cylinder head 11OA, HOB has a rectangular configuration including a lower side surface 112.
  • a component chamber 114 extends the length of each cylinder head 11OA, 11OB.
  • the component chambers 114 each have a cylindrical configuration centered on an axis 116.
  • Each component chamber 114 has an inlet end portion 118 and an outlet end portion 120.
  • the inlet end portion 118 of the first cylinder head 11OA forms an inlet of the compressor 10.
  • the outlet end portion 120 forms an outlet of the first cylinder head 11 OA.
  • the inlet end portion 118 of the second cylinder head 11OB forms an inlet to the second head HOB.
  • a conduit 119 connects the outlet of the first head 11OA to the inlet of the second head HOB.
  • the threaded outlet end portion 120 of the second head 110b forms an outlet of the compressor 10.
  • the cylinder heads 110a, 110b have a plurality of charging ports 122A-122D that extend between the component chamber 114 and the lower side surface 112.
  • the number of charging ports 122A-122D is equal to the number of cylinders 36A-36D in the compressor 10 in the illustrated embodiment.
  • the charging ports 122A-122D establish fluid communication between the cylinders 36A-36D and the component chamber 114.
  • a single charging port 122 is associated with each one of the cylinders 36.
  • the first cylinder 36A has a first charging port 122A
  • the second cylinder 36B has a second charging port 122B
  • the third cylinder 36C has a third charging port 122C
  • the fourth cylinder 36D has a fourth charging port 122D.
  • a plurality of components are located in the component chamber 114 of the cylinder heads 11OA, HOB.
  • the components direct fluid flow between the inlet 118 of the first head 11 OA, the cylinders 36A-36D and the outlet 120 of the second head HOB.
  • the components include a plurality of check valves 130A- 13 OF for controlling flow of air into and out of the various cylinders 36A-36D, and a plurality of components or structures for positioning the check valves in the chamber 114 and inhibiting gas flow around the check valves (i.e. leakage around the check valves).
  • the components for positioning the check valves are spacers and are configured to direct air to flow between the check valves.
  • the check valves may also be spaced apart in a variety of ways, other than using spacers.
  • one or more of the check valves may thread into the component chamber 114, the component chamber may include a stop surface, etc. Any manner of positioning the check valves may be used, hi the drawings, arrangements for setting the position of the check valves with respect to the inlets 118 and outlets 120 of the cylinder heads 11OA, 11OB are not shown. However, it is understood that spacers or another positioning arrangement would be used to position the illustrated check valves and spacers as shown.
  • U.S. Patent Application Publication, Pub. No. 2007/0065301 shows that inlet and outlet connectors 180, 196 may engage spacers that fix the position of the valves.
  • the components located in the component chamber may also include a plurality of seals that prevent leakage around the check valves.
  • each illustrated check valve 130A- 130F includes a valve body 132 having a generally cylindrical configuration with a central chamber 134.
  • An end wall 136 is located at the upstream end of the valve body 132.
  • the end wall 136 has a central opening 138.
  • the downstream end of the valve body 132 is open.
  • the check valve 130A- 130F each include a movable valve element in the form of a ball 146.
  • the dimensions of the ball 146 are selected so that when the ball is in engagement with the end wall 136 of the valve body 132, the ball closes the opening 138. When the ball 146 is away from the end wall 136, fluid flow is enabled through the check valve. A spring biases the ball into engagement with the end wall 136 to close the valve. Further details of acceptable check valves are described in U.S. Patent Application Publication No. 2007/0065301.
  • Spacers 150A- 150D are positioned in the chamber 114 and space the check valves 130A-130F apart.
  • Figs. HA and HB illustrate the spacers 150B-150D.
  • the spacers 150B-150D are preferably identical to each other.
  • Each spacer 150B- 150D is a cylindrical block of metal that has an outside diameter substantially equal in size to the inside diameter of the component chamber 114 in the cylinder heads 11OA, HOB.
  • the spacers 150B-150D has an upstream end portion 152 and a downstream end portion 154. However, in the illustrated embodiment, the end portions 152, 154 are identical, since the spacer is symmetrical about a midplane 153.
  • the spacer 150 has a small diameter central opening 155 that extends for the length of the spacer between the upstream end portion 152 and the downstream end portion 154.
  • the symmetric end portions 152, 154 both include passages 158 that extend radially outward from the central opening 155 and an external groove 160 in fluid communication with the passage 158.
  • fluid communication is established between the central opening 155 of the spacer 150, and the external groove 160.
  • the spacer 150A is shorter than the spacers 150B- 150D.
  • the spacer 150A is a cylindrical block of metal that has an outside diameter substantially equal in size to the inside diameter of the component chamber 114 in the cylinder head 110.
  • the spacer 150A has symmetrical upstream and downstream end portions 164, 166.
  • a small diameter central opening 170 extends for the length of the short spacer between the upstream end portion 164 and the downstream end portion 166.
  • the spacer 150A also has an internal passage 172 that extends radially outward from the central passage 170 and terminates in a groove 174 on the outer surface of the spacer 150A. As a result, fluid communication is established between the upstream and downstream end portions 164 and 166 of the spacer 150A, and the external groove 174.
  • an inlet connector 180 is secured in the upstream end of each of the cylinder heads 11OA, HOB.
  • the inlet connector has a fluid inlet passage 182 that communicates with the component chamber.
  • An outlet connector 196 is secured in the downstream end of each of the cylinder heads HOA, HOB.
  • the outlet connector 196 has a fluid outlet passage 198 that communicates with the component chamber 114.
  • the components are positioned in the component chamber 114 in the cylinder heads 11OA, HOB.
  • An inlet check valve 130E is positioned in the component chamber 114 in the first cylinder head 11OA.
  • the inlet opening 138 of the inlet check valve 130E is in communication with the inlet 118 of compressor 10.
  • a seal may be provided between the check valve and the component chamber 114.
  • the spacer 150A is positioned in the component chamber 114 in the cylinder head 110 such that an upstream end of the spacer 154 A engages the downstream end of the inlet check valve 130E.
  • the external groove 174 on the spacer 162 aligns with the first charging port 122 A in the cylinder head 11OA. As a result, fluid communication can be established between the component chamber 114 and the first cylinder 36A. (See Fig. 2A).
  • a second check valve, or first cylinder check valve, 130A is positioned in the component chamber 114 in the cylinder head 11OA.
  • the upstream end of the second check valve 130A engages the downstream end of the spacer 150A.
  • the inlet opening 138 of the second check valve 130A aligns with the central passage 170 in the spacer 150B.
  • An optional seal is provided between the spacer 150A and the second check valve 130A.
  • a spacer 150B is positioned in the component chamber 114 in the cylinder head 11OA.
  • the upstream end of the spacer 150B engages the downstream end of the check valve 130A.
  • the central opening 155 of the spacer 150B aligns with the outlet of the check valve 130A.
  • the external groove 160 at the downstream end of the second spacer 150B aligns with the second charging port 122B in the cylinder head HOA.
  • a third check valve, or second cylinder check valve, 130B is positioned in the component chamber 114 in the cylinder head 11OA.
  • the upstream end of the check valve 130B engages the downstream end of the spacer 150B.
  • the opening 138 of the check valve 130B aligns with the central passage 155 in the spacer 150B.
  • An optional seal is formed between the spacer 150B and the check valve 130B.
  • an optional fourth check valve, or second head inlet check valve 130C is positioned in the component chamber 114 in the second cylinder head HOB.
  • the inlet opening 138 of the inlet check valve 130C is in communication with the inlet 118 of second head 11 OB.
  • a seal may be provided between the check valve and the component chamber 114.
  • a spacer 150C is positioned in the component chamber 114 in the cylinder head HOB.
  • the upstream end of the spacer 150C engages the downstream end of the check valve 130C.
  • the central opening 155 of the spacer 150C aligns with the central opening of the check valve 130C.
  • the external groove 160 of the spacer 150C aligns with the charging port 122C in the cylinder head HOB.
  • a fifth check valve, or third cylinder check valve, 130D is positioned in the component chamber 114 in the cylinder head HOB.
  • the upstream end of the check valve 130D engages the downstream end of the spacer 150C.
  • the opening 138 of the check valve 130D aligns with the passage 155 in the spacer 150C.
  • a seal may be provided between spacer 150C and the check valve 130D.
  • a spacer 150D is positioned in the component chamber 114 in the cylinder head HOB.
  • the upstream end of the spacer 150D engages the downstream end of the third cylinder check valve 130D.
  • the central opening 156 of the spacer 150D aligns with the central chamber of the check valve 130D.
  • the external groove 160 at the downstream end of the fourth spacer 150D aligns with the fourth charging port 122D in the cylinder head 110.
  • a sixth check valve, or fourth cylinder check valve 130F is positioned in the component chamber 114 in the cylinder head HOB.
  • the upstream end of the fourth cylinder check valve 130F engages the downstream end of the spacer 150D.
  • the opening 138 of the check valve aligns with the central passage 155 in the spacer 150D.
  • An optional seal is provided between the spacer 150D and the check valve 130D.
  • An outlet connector 196 is fixed to the downstream end of the cylinder head HOB.
  • the outlet connector 196 has a fluid outlet passage 198 that is in fluid communication with the component chamber 114 of the cylinder head 11OB.
  • all the check valves 130A-F of the compressor 10 are located in the cylinder heads 11OA, 11OB.
  • the second check valve 130A is forced open to allow air to flow out of the first cylinder 36A into the second spacer 150B.
  • the air flows through the second spacer 150B to the radially extending passages 158 (See Figs. 1 IA and 1 IB) and the external groove 160 in the downstream end 154 of the second spacer 150B.
  • the air then flows from the groove 160 into the second charging port 122B.
  • the timing of the first and second cylinders 36A and 36B is selected so that when the first cylinder 36 A is on its exhaust phase, the second cylinder 36B is on its intake phase. This is achieved by the 180 degree offset ⁇ between the first and second eccentric bodies 84 A, 84B.
  • the air that is compressed in the first cylinder 36A and forced into the second spacer 150B is able to flow into the second cylinder 36B, to be further compressed, because the second cylinder is smaller in diameter than the first cylinder but has the same stroke in the illustrated exemplary
  • a system 210 includes a concentrator 212 that is operable to provide oxygen-enriched gas, for example, from an ambient air input.
  • the oxygen-enriched gas is fed to a product tank 214.
  • a regulator 216 emits oxygen- enriched gas from the product tank 214 into a flew line 218 and feeds the same to a flow meter 220 which subsequently emits the oxygen-enriched gas to the patient at a predetermined flow rate, for example a flow rate of from 0.1 to 6 liters per minute.
  • the flow meter 220 can be closed so that all the oxygen-enriched gas is directed to the compressor 10.
  • the compressor may take a wide variety of forms and may include any combination or subcombination of the features of the compressors described with respect to Figs. 1-11. Further, any combination or subcombination of the features of the compressors described with respect to Figs. 1-11 can be used in a wide variety of different applications, including but not limited to the systems illustrated by Figs. 12 and 13.
  • Gas not directed to the patient is carried via line 222 to two-way valve 224.
  • a very small portion of the gas in the flow line 220 is directed through line 226 and restrictor 228 into an oxygen sensor 230 which detects whether or not the concentration of the oxygen is of a predetermined value, for example, at least 84 percent as directed to the patient and at least 93 ⁇ 3% as directed to the compressor.
  • the oxygen sensor 230 detects a concentration at or above the predetermined level, the two-way valve 224 is kept open to permit the oxygen- enriched gas to flow through the valve 224 and line 232 into a buffer tank 234 wherein the pressure is essentially the same as the pressure in the product tank 214.
  • two-way valve 224 is closed so that the oxygen concentrator 212 can build up a sufficient oxygen concentration. This arrangement prioritizes the flow of oxygen- enriched gas so that the patient is assured of receiving a gas having a sufficient oxygen concentration therein.
  • Buffer tank 234 can have a regulator 236 thereon generally set at 12 psi to admit the oxygen-enriched gas to the compressor 10 when needed.
  • the output of the compressor 10 is used to fill a cylinder or portable tank 238 for ambulatory use by the patient.
  • the pressure regulator 236 can be set at anywhere from about 13 to about 21 psi.
  • a restrictor 240 controls the flow rate of gas from the buffer tank 234 to the compressor 10. Should the operation of the compressor 10 cause the pressure in the buffer tank 234 to drop below a predetermined value, a pressure sensor (not shown) automatically cuts off the flow of gas at a pressure above the pressure of the gas being fed to the patient. This prioritization assures that the patient receives priority with regard to oxygen-enriched gas.
  • Fig. 13 shows a system 210a that is somewhat different from the system 210 of Fig 12.
  • the compressor 10 includes its own oxygen sensor and control circuitry, so that the elements 224-232 are not present as they are in the system shown in Fig. 12.
  • the regulator 236 is not present on the buffer tank.
  • a flow restrictor may be provided between the concentrator and the buffer tank. (It should be noted that the buffer tank 234 is optional in all systems, and that the compressor could be fed directly from the product tank).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Compressors, Vaccum Pumps And Other Relevant Systems (AREA)

Abstract

L’invention concerne un compresseur comprenant un ensemble cylindre selon une configuration V4. Un vilebrequin du compresseur comporte un arbre principal et des premier et second corps excentriques. Les deux corps excentriques entraînent quatre pistons.
PCT/US2010/045705 2009-08-17 2010-08-17 Compresseur WO2011022361A1 (fr)

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CA2772244A CA2772244A1 (fr) 2009-08-17 2010-08-17 Compresseur
CN201080046643XA CN102575520A (zh) 2009-08-17 2010-08-17 压缩机
AU2010284357A AU2010284357A1 (en) 2009-08-17 2010-08-17 Compressor
EP10810463A EP2467578A1 (fr) 2009-08-17 2010-08-17 Compresseur

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US23433009P 2009-08-17 2009-08-17
US61/234,330 2009-08-17

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AU (1) AU2010284357A1 (fr)
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CA2772244A1 (fr) 2011-02-24
EP2467578A1 (fr) 2012-06-27
CN102575520A (zh) 2012-07-11
AU2010284357A1 (en) 2012-03-08
US20110038740A1 (en) 2011-02-17

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