US20100008801A1 - Reciprocating piston compressor - Google Patents
Reciprocating piston compressor Download PDFInfo
- Publication number
- US20100008801A1 US20100008801A1 US12/310,761 US31076107A US2010008801A1 US 20100008801 A1 US20100008801 A1 US 20100008801A1 US 31076107 A US31076107 A US 31076107A US 2010008801 A1 US2010008801 A1 US 2010008801A1
- Authority
- US
- United States
- Prior art keywords
- cylinder
- compressor
- compressor according
- front wall
- reciprocating piston
- Prior art date
- Legal status (The legal status 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 status listed.)
- Abandoned
Links
Images
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
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
- F04B35/045—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric using solenoids
-
- 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
- F04B39/10—Adaptations or arrangements of distribution members
- F04B39/1066—Valve plates
-
- 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
- F04B39/10—Adaptations or arrangements of distribution members
- F04B39/1073—Adaptations or arrangements of distribution members the members being reed valves
-
- 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
- F04B39/10—Adaptations or arrangements of distribution members
- F04B39/1073—Adaptations or arrangements of distribution members the members being reed valves
- F04B39/1086—Adaptations or arrangements of distribution members the members being reed valves flat annular reed valves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
A compressor including a cylinder, the cylinder delimiting a compressor chamber having a circular cross-section and the cylinder having a longitudinal axis and including a front wall, the front wall of the cylinder having inlet and outlet openings for passage therethrough of a medium to be compressed; and a reciprocating piston disposed in the compressor chamber, the reciprocating piston being reciprocable within the compressor chamber in a movement that includes a dead center position and having a pair of opposed ends with one end being more proximate to the front wall of the cylinder than the other opposed end and the reciprocating piston having an expulsion projection on its one end, the expulsion projection entering the outlet opening in a dead center position of the reciprocating piston, the longitudinal axis of the cylinder extending through the outlet opening.
Description
- The present invention relates to a compressor with a cylinder, which contains a compressor chamber having a circular cross-section, in which a reciprocating piston can be moved to and fro. Inlet and outlet openings for a medium to be compressed are both frequently arranged on a front wall of the cylinder. To be able to provide the openings with as large a diameter as possible in relation to the diameter of the front wall, they are mostly arranged on different sides of an imaginary center plane which diametrically crosses the front wall.
- To achieve a high degree of efficiency of the compressor, the dead volume thereof has to be as minimal as possible. It is thus known to provide a reciprocating piston compressor with a projection on the surface of the piston which faces the front wall, said projection engaging in the outlet opening on the top dead center of the piston in order to expel medium contained therein from the compressor chamber as thoroughly as possible.
- To ensure that the projection of the piston can reliably engage in the outlet opening, the piston in the compressor chamber must not be rotatable about the longitudinal axis thereof. This presents no problem in the case of a conventional reciprocating piston which is driven by a rotating motor by way of a crank gear. With newer compressor models, like the linear compressor known from U.S. Pat. No. 6,505,032 B2 for instance, a rotation of the piston about the longitudinal axis is not ruled out. If such a rotatable piston is provided with a projection in the afore-described manner, there is a danger of the projection no longer entering the outlet opening once the piston has rotated and instead striking the front wall of the cylinder and thereby damaging the compressor.
- The object of the invention is to specify a compressor, which achieves a high degree of efficiency without having to exclude from the design a rotation of the piston in the compressor chamber about the longitudinal axis thereof.
- The object is achieved in that in the case of a compressor with a cylinder, in which a compressor chamber with a circular cross-section is formed and inlet and outlet openings for a medium to be compressed are formed in a front wall of the cylinder, and with a reciprocating piston which can be moved to and fro in the compressor chamber, said reciprocating piston having an expulsion projection on its surface facing the front wall, said expulsion projection engaging in the outlet opening in a dead center position of the piston, and the longitudinal axis of the cylinder runs through the outlet opening. The central axis is to be understood as a longitudinal axis.
- In order to realize a large cross-section in the inlet opening despite the central positioning of the outlet opening, the latter preferably has a non-circular cross-section, the dimensions of which are greater in the peripheral direction of the cylinder than in the radial direction.
- The inlet opening can in particular have a cross-section in the form of an arc.
- Alternatively, a plurality of inlet openings distributed about the outlet opening may be provided. These are also expediently distributed along an arc.
- The arc is expediently concentric in respect of the longitudinal axis. It preferably extends over an angle of less than 180°. The latter is particularly significant in order to be able to shut off the whole inlet cross-section using a single shut-off body.
- Such a shut-off body is preferably forced against the inlet opening by means of a first flat spring arranged in the compressor chamber.
- To keep the bending load of the flat spring to a minimum, it is expedient to make this as long as possible in relation to the radial dimensions of the compressor. It is particularly expedient here for the flat spring to be fastened to a point on the front wall which is diametrically opposite to the inlet opening.
- To prevent the flat spring from shutting off the outlet opening, it is preferably provided with an opening, through which the longitudinal axis of the cylinder runs.
- A second shut-off body is preferably forced against the outlet opening by means of a second flat spring arranged on the exterior of the front wall.
- The assembly of the compressor is simplified if the first and second flat spring are fastened to the front wall by means of at least one common rivet. Each flat spring is preferably held by at least two rivets in order to reduce the rotation of the flat spring, which could result in the shut-off body no longer correctly covering the assigned opening.
- Further features and advantages of the invention result from the description of exemplary embodiments which follows with reference to the appended figures, in which;
-
FIG. 1 shows a perspective view of a linear compressor according to the invention; -
FIG. 2 shows an exploded view of parts of the compressor inFIG. 1 ; and -
FIG. 3 shows a section through the cylinder of the compressor inFIG. 1 . -
FIG. 1 shows an exemplary design of a linear compressor for a refrigerator, which represents a preferred use of the invention. The linear compressor has a stiff, approximately U-shaped frame seen from the top view, which is composed of twoflat wall pieces 1 and anarc 2. Afirst membrane spring 3 is clamped between front sides of thearc 2 which face one another and twowall pieces 1, asecond membrane spring 4 of the same type asmembrane spring 3 is fastened to front sides of thewall pieces 1 which face away from thearc 2. - The membrane springs 3, 4 punched from spring steel sheet each have four
spring arms 5, which extend in a zigzagged fashion from thewall pieces 1 to acentral section 6, with which they coincide. Thecentral section 6 has two bores in each instance, two exterior, upon which a permanently magnetic oscillatingbody 8 is suspended with the aid of screws or rivets 7 and a central bore, through which apiston rod 10 fastened to the oscillatingbody 8, e.g. by means of screws, extends in the case ofmembrane spring 3. Thepiston rod 10 connects theoscillating body 8 to a reciprocating piston (not visible in the Fig) inside acylinder 15, which is supported by thearc 2. The refrigerant inlet and outlet ports of the pump chamber are identified with 16 and/or 17. - Two
electromagnets 9 with an E-shaped yoke and a coil wound around the central limb of the E are each arranged between the oscillatingbody 8 and thewall pieces 1 with pole shoes facing theoscillating body 8 and are used to power an oscillating movement of the oscillatingbody 8. Acontrol circuit 37 provides theelectromagnets 9 with an alternating current, the frequency of which is adjusted to the natural frequency of the system which can oscillate, which is formed by themembrane springs body 8 and the reciprocating piston powered thereby. - The
cylinder 15 is, as apparent inFIG. 1 , arranged in amain body 11, in which the reciprocating piston is moved to and fro, avalve plate 12, which forms a front wall of a compressor chamber recessed in the main body and acap 13, upon which the inlet andoutlet ports - The design of the cylinder is more obvious with the aid of the exploded representation in
FIG. 2 . Themain body 11 is omitted inFIG. 2 ; the outline of the compressor chamber which extends through the main body is indicated on thevalve plate 12 as adashed circle 14. The longitudinal axis of the compressor chamber is indicated as a dot-dashed line. A circular outlet bore 18 is arranged in thevalve plate 12 exactly coaxially in respect of the longitudinal axis. An arched slot extends through an angle of approximately 120° here about the outlet bore 18 and forms an inlet opening 19 of the compressor chamber. - Further bores 20 at the edges of the
valve plate 12 are provided, in order to receive screws (not shown), with which thevalve plate 12 and thecap 13 are fastened to themain body 11. Twofurther bores 21 are used to fasten twoflat springs 22 and/or 23 to thevalve plate 12 with the aid ofrivets 24. Theflat springs flat springs elongated foot 25, in whichholes 26 which are complimentary to thebores 21 are formed for therivets 24 and anelastic guide 27 protruding from the foot in respect of the longitudinal axis. - An
opening 28 is cut into theguide 27 of theflat spring 23, which, if theflat spring 23 is riveted to thevalve plate 12, releases the outlet bore 18. An end section 38 of theguide 27, which extends in an arched manner about the opening 28, forms a shut-off body of the inlet valve, which covers the inlet opening 19 when theflat spring 23 is relaxed. - The
guide 27 of theflat spring 22 rests externally against the outlet bore 18, with its top functioning as a shut-off body of the outlet valve. - The interior of the
cap 13 is subdivided into a low-pressure cavity 30 and a high-pressure cavity 31 by means of anintermediate wall 29, into which therefrigerant inlet port 16 and/oroutlet port 17 open and which communicate with the compressor chamber by way of the inlet opening 19 and/or outlet bore 18. - The reciprocating piston designated 32 has a
projection 33 which is concentric in respect of the longitudinal axis in the perspective view inFIG. 2 of the side facing away from the observer, the length and diameter of which correspond to the common thickness of thevalve plate 12 and theflat spring 23 and/or the diameter of the outlet bore 18. At a top dead center of the movement of the reciprocatingpiston 32, if this touches theflat spring 23 pressed against thevalve plate 12 by pressure prevailing in the compressor chamber, theprojection 33 engages in the outlet bore 18 and ousts the remaining gas contained therein. -
FIG. 3 shows a section through themain body 11 of the compressor chamber and the reciprocatingpiston 32. It is apparent that thecompressor chamber 14 is surrounded by anannular cavity 34, which communicates with thecompressor chamber 14 by means of a plurality ofsmall openings 35. Thecavity 34 extends in the longitudinal direction of thecompressor chamber 14 from the top to the bottom dead point of the reciprocatingpiston 32. It is connected to the high-pressure cavity 31 of the cap by way of abore 36 of thevalve plate 12 and is supplied with compressed refrigerant in this way, which penetrates in small quantities through theopenings 35 into thecompressor chamber 14 and thus forms a gas cushion between the walls thereof and the reciprocatingpiston 32 upon which the reciprocatingpiston 32 can be moved with minimal friction in a wear-resistant fashion.
Claims (13)
1-12. (canceled)
13. A compressor comprising:
a cylinder, the cylinder delimiting a compressor chamber having a circular cross-section and the cylinder having a longitudinal axis and including a front wall, the front wall of the cylinder having inlet and outlet openings for passage therethrough of a medium to be compressed; and
a reciprocating piston disposed in the compressor chamber, the reciprocating piston being reciprocable within the compressor chamber in a movement that includes a dead center position and having a pair of opposed ends with one end being more proximate to the front wall of the cylinder than the other opposed end and the reciprocating piston having an expulsion projection on its one end, the expulsion projection entering the outlet opening in a dead center position of the reciprocating piston, the longitudinal axis of the cylinder extending through the outlet opening.
14. The compressor according to claim 13 wherein the inlet opening is formed with a noncircular cross-section wherein the dimensions of the non-circular cross-section are greater in the peripheral direction of the cylinder than in the radial direction of the cylinder.
15. The compressor according to claim 14 wherein the inlet opening is formed with a cross-section in the form of an arc.
16. The compressor according to claim 13 wherein the compressor is formed with a plurality of inlet openings distributed about the outlet opening.
17. The compressor according to claim 16 wherein the inlet openings are distributed along an arc.
18. The compressor according to claim 15 wherein the arc extends over an angle of less than 180.
19. The compressor according to claim 13 and further comprising a first shut-off body wherein the first shut-off body is forced against the inlet opening by a first flat spring disposed in the compressor chamber.
20. The compressor according to claim 19 wherein the first flat spring is fastened to a point on the front wall disposed oppositely from the inlet opening.
21. The compressor according to claim 20 wherein the first flat spring has an opening through which the longitudinal axis of the cylinder extends.
22. The compressor according to claim 15 and further comprising a second shut-off body wherein the second shut-off body is forced against the outlet opening by a second flat spring disposed on the exterior of the front wall.
23. The compressor according to claim 19 wherein the first flat spring and the second flat spring are each fastened to the front wall by at least one rivet.
24. The compressor according to claim 15 and further comprising a linear motor configured for driving piston movement.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006042015.2 | 2006-09-07 | ||
DE102006042015A DE102006042015A1 (en) | 2006-09-07 | 2006-09-07 | reciprocating |
PCT/EP2007/058184 WO2008028736A1 (en) | 2006-09-07 | 2007-08-07 | Reciprocating piston compressor |
Publications (1)
Publication Number | Publication Date |
---|---|
US20100008801A1 true US20100008801A1 (en) | 2010-01-14 |
Family
ID=38596318
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/310,761 Abandoned US20100008801A1 (en) | 2006-09-07 | 2007-08-07 | Reciprocating piston compressor |
Country Status (6)
Country | Link |
---|---|
US (1) | US20100008801A1 (en) |
EP (1) | EP2064445B1 (en) |
CN (1) | CN101512152A (en) |
DE (1) | DE102006042015A1 (en) |
RU (1) | RU2450160C2 (en) |
WO (1) | WO2008028736A1 (en) |
Citations (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2025240A (en) * | 1934-10-20 | 1935-12-24 | Universal Cooler Corp | Refrigerant gas compressor |
US2161769A (en) * | 1936-03-23 | 1939-06-06 | Mills Novelty Co | Discharge valve for compressors and the like |
US2193123A (en) * | 1936-02-28 | 1940-03-12 | Roches Philip W Des | Compressor valve |
US3509907A (en) * | 1968-09-16 | 1970-05-05 | Copeland Refrigeration Corp | Compressor valving assembly |
US4867650A (en) * | 1987-04-16 | 1989-09-19 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Reciprocatory piston type compressor with noise free suction valve mechanism |
US5147190A (en) * | 1991-06-19 | 1992-09-15 | General Motors Corporation | Increased efficiency valve system for a fluid pumping assembly |
US5265646A (en) * | 1993-03-17 | 1993-11-30 | Ingersoll-Rand Company | Valve spacer plate |
US5275542A (en) * | 1991-04-16 | 1994-01-04 | Sanden Corporation | Free piston-type compressor |
US5454397A (en) * | 1994-08-08 | 1995-10-03 | Fel-Pro Incorporated | Reed valve assembly and gas compressor incorporating same |
US5772410A (en) * | 1996-01-16 | 1998-06-30 | Samsung Electronics Co., Ltd. | Linear compressor with compact motor |
US5816783A (en) * | 1993-05-19 | 1998-10-06 | Hitachi, Ltd. | Electrically driven hermetic compressor |
US6152710A (en) * | 1997-12-30 | 2000-11-28 | Lg Electronics, Inc. | Discharge valve system for linear compressor |
US6379125B1 (en) * | 1996-07-09 | 2002-04-30 | Sanyo Electric Co., Ltd. | Linear compressor |
US6505032B1 (en) * | 2000-05-26 | 2003-01-07 | Xtremespectrum, Inc. | Carrierless ultra wideband wireless signals for conveying application data |
US6540492B2 (en) * | 2001-04-09 | 2003-04-01 | Carrier Corporation | Compressor piston with reduced discharge clearance |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB392811A (en) * | 1932-10-03 | 1933-05-25 | Teves Kg Alfred | Improvements in electromagnetically actuated gas compressors |
WO1997001033A1 (en) * | 1995-06-23 | 1997-01-09 | Lg Electronics Inc. | Coolant supply apparatus for linear compressor |
BR0113484B1 (en) * | 2001-06-26 | 2011-08-09 | suction valve coupling frame for reciprocating motion compressor. |
-
2006
- 2006-09-07 DE DE102006042015A patent/DE102006042015A1/en not_active Withdrawn
-
2007
- 2007-08-07 CN CNA2007800328601A patent/CN101512152A/en active Pending
- 2007-08-07 EP EP07788285A patent/EP2064445B1/en not_active Not-in-force
- 2007-08-07 US US12/310,761 patent/US20100008801A1/en not_active Abandoned
- 2007-08-07 RU RU2009109832/06A patent/RU2450160C2/en not_active IP Right Cessation
- 2007-08-07 WO PCT/EP2007/058184 patent/WO2008028736A1/en active Application Filing
Patent Citations (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2025240A (en) * | 1934-10-20 | 1935-12-24 | Universal Cooler Corp | Refrigerant gas compressor |
US2193123A (en) * | 1936-02-28 | 1940-03-12 | Roches Philip W Des | Compressor valve |
US2161769A (en) * | 1936-03-23 | 1939-06-06 | Mills Novelty Co | Discharge valve for compressors and the like |
US3509907A (en) * | 1968-09-16 | 1970-05-05 | Copeland Refrigeration Corp | Compressor valving assembly |
US4867650A (en) * | 1987-04-16 | 1989-09-19 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Reciprocatory piston type compressor with noise free suction valve mechanism |
US5275542A (en) * | 1991-04-16 | 1994-01-04 | Sanden Corporation | Free piston-type compressor |
US5147190A (en) * | 1991-06-19 | 1992-09-15 | General Motors Corporation | Increased efficiency valve system for a fluid pumping assembly |
US5265646A (en) * | 1993-03-17 | 1993-11-30 | Ingersoll-Rand Company | Valve spacer plate |
US5816783A (en) * | 1993-05-19 | 1998-10-06 | Hitachi, Ltd. | Electrically driven hermetic compressor |
US5454397A (en) * | 1994-08-08 | 1995-10-03 | Fel-Pro Incorporated | Reed valve assembly and gas compressor incorporating same |
US5772410A (en) * | 1996-01-16 | 1998-06-30 | Samsung Electronics Co., Ltd. | Linear compressor with compact motor |
US6379125B1 (en) * | 1996-07-09 | 2002-04-30 | Sanyo Electric Co., Ltd. | Linear compressor |
US6152710A (en) * | 1997-12-30 | 2000-11-28 | Lg Electronics, Inc. | Discharge valve system for linear compressor |
US6505032B1 (en) * | 2000-05-26 | 2003-01-07 | Xtremespectrum, Inc. | Carrierless ultra wideband wireless signals for conveying application data |
US6540492B2 (en) * | 2001-04-09 | 2003-04-01 | Carrier Corporation | Compressor piston with reduced discharge clearance |
Also Published As
Publication number | Publication date |
---|---|
EP2064445B1 (en) | 2012-10-10 |
WO2008028736A1 (en) | 2008-03-13 |
RU2450160C2 (en) | 2012-05-10 |
CN101512152A (en) | 2009-08-19 |
DE102006042015A1 (en) | 2008-03-27 |
RU2009109832A (en) | 2010-10-20 |
EP2064445A1 (en) | 2009-06-03 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: BSH BOSCH UND SIEMENS HAUSGERAETE GMBH, GERMANY Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GIACCHI, MARCO;KUSNIK, THORSTEN;SCHUBERT, JAN-GRIGOR;REEL/FRAME:023127/0731;SIGNING DATES FROM 20090302 TO 20090313 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |