EP1180214B1 - Axialkolben-kältemittelverdichter - Google Patents
Axialkolben-kältemittelverdichter Download PDFInfo
- Publication number
- EP1180214B1 EP1180214B1 EP00929315A EP00929315A EP1180214B1 EP 1180214 B1 EP1180214 B1 EP 1180214B1 EP 00929315 A EP00929315 A EP 00929315A EP 00929315 A EP00929315 A EP 00929315A EP 1180214 B1 EP1180214 B1 EP 1180214B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- outlet opening
- projection
- sectional area
- cross
- 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.)
- Expired - Lifetime
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
- 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
- F04B39/0005—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 adaptations of pistons
Definitions
- the invention relates to an axial piston refrigerant compressor with at least one piston-cylinder unit, whose cylinders are closed by a valve plate which has at least one pressure valve with a Has outlet opening, with a projection of the piston protrudes into the outlet opening when the piston is in the Located near its top dead center.
- An axial piston compressor is from patent application DK 898/92 known with a conical piston projection, the one with a conical outlet opening of the pressure valve interacts.
- the piston projection should the outlet opening at top dead center if possible completely fill in to their "harmful space" avoid, i.e. to also eject the gas contained therein and thereby the efficiency of the compressor to increase.
- the invention has for its object an axial piston refrigerant compressor of the type mentioned at the beginning specify which has an even higher efficiency.
- this object is achieved in that the outlet opening, the piston projection, the inside the valve plate and the end face of the piston one Flow channel with at least most of it its circumference continuous course of its axial cutting edges limit that the free cross-sectional area of the Flow channel through the smallest cross-sectional area the outlet opening is determined until the Piston reaches a position during its pressure stroke has at least the height of the outlet opening below top dead center lies that during the rest Piston pressure stroke the relative decrease in free Cross-sectional area of the flow channel less than that relative decrease in the volume of the pressure chamber is and that at least 45% of the volume of the outlet opening in the top dead center of the piston filled by the projection are.
- the cross-sectional area the outlet opening to the outside of the valve plate decreases that the cross-sectional area of the projection decreases towards its free end and that the Cross-sectional areas of the outlet opening and the projection change in the axial direction so that the free cross-sectional area of the flow channel during the piston movement changes relatively less than that Volume remaining in the cylinder. This ensures that the flow resistance of the flow channel remains at a low level during the flow or mass flow decreases during the piston pressure stroke.
- the flow resistance can of the flow channel through the smallest cross-sectional area the outlet opening to be determined until the free end of the piston projection with the inside of the Valve plate is aligned. This ensures optimal gas flow ensured while the mass flow through the outlet opening is the largest.
- An advantageous embodiment is that a Axial section through the outlet opening of the valve plate and the piston projection has curved cutting edges.
- the cutting edge of the outlet opening steeper than that of the ledge.
- the compressor according to the invention can do so be designed so that the transitions between the valve plate surface and the exhaust port and transition between the piston face and the projection are continuous, the transition between the outlet opening and valve seat and the transition between projection and piston face are rounded. Thereby can the gas drain during the emptying of the cylinder done almost without vortex formation, the flow resistance is reduced.
- the outlet opening can be asymmetrical. This is an advantage if the outlet opening is opposite the center of the cylinder is offset.
- the outlet opening can be symmetrical his. This is an advantage if the outlet opening is near the center of the cylinder.
- the piston projection can also be asymmetrical his. This allows the lead to be asymmetrical Outlet opening can be adjusted.
- piston projection is symmetrical, it can be adapted to a symmetrical outlet opening become.
- a piston 1 is guided in a cylinder, not shown, which is closed by a valve plate 2.
- the valve plate 2 is shown schematically with a Pressure valve 3 provided that a circular cylindrical Outlet opening 4 in the valve plate 2 with a trained on the outside of the valve plate 2
- Valve seat 5 and a valve closure element 6 in the form has a plate.
- the valve closure element 6 is under the internal pressure of the cylinder against the force a spring, not shown, lifted off the valve seat 5, to open the pressure valve 3, or is on the valve plate 2 clamped leaf spring educated.
- the flow at the circumference of the outlet opening 4th restricted, i.e. the free cross-sectional area of a Flow channel to the outlet opening 4 is reduced and thereby the flow velocity during the pressure stroke with the pressure valve 3 open, so that recirculation zones are formed in the outlet opening, which increase the flow resistance and thereby the Reduce compressor efficiency and at the same time increase the noise level when the compressor is operating.
- the volume of the outlet opening 4 acts as "more harmful Space ", which further increases the efficiency of the compressor reduced.
- the known refrigerant compressor according to FIG. 2 differs from that of FIG. 1 only in that the End face 8 of the piston 1 with an approximately frustoconical shape Projection 9 is provided, the outlet opening 4 partially completed.
- the projection 9 can however, restrict the flow before the Projection 9 enters the outlet opening 4 and before the pressure valve 3 is open. If the pressure valve 3 is open is the flow rate of the gas, while being pushed out of the cylinder by the piston 1 is greatest, so that a reduction in Cross-sectional area of the flow channel the efficiency of the compressor significantly reduced.
- the end face 8 of the piston 1 is provided with a projection 10 which the outlet opening 11 of the pressure valve 3 at top dead center of the piston 1 partially fills in as it does the continuous boundary line of the piston 1 is shown is.
- the dashed lines represent the piston 10 in different lower positions.
- the cross-sectional area or the diameter changes the outlet opening 11 over its entire height H, i.e. the Cross-sectional area or its diameter increases from the inside outwards steadily and non-linearly. It is also the transition from the inside 7 of the valve plate 2 rounded to the outlet opening 11.
- the projection 10 of the piston 1 has one over its total height steady and non-linear to its free Cross-sectional area decreasing towards the end. The same also applies to the cross-sectional diameter of the projection 10. The decrease rate of the cross-sectional area the projection 10 is somewhat larger, however than that of the outlet opening 11. At the same time the Transition between the flat end face 8 of the piston 10 and the circumferential surface of the projection 10 continuously or rounded.
- a flow channel 12 is formed, the axial cutting edges are continuously curved in each axial section plane and the free cross-sectional area of the position of the piston 1 depends, i.e. decreases during its pressure stroke.
- the cross-sectional area of the flow channel changes 12 not suddenly, but steadily over the length of the flow channel.
- the outlet opening 15 of the pressure valve 3 asymmetrical.
- the Projection 16 of the piston 1 is correspondingly asymmetrical. That is, the steepness of the flanks of the outlet opening 15 and the projection 16 are opposite to each other or facing away from each other, left and right in the axial sectional view, different. Because of these mutually adapted asymmetries of the outlet opening and the protrusion 16 also flows the gas asymmetrical from the cylinder 17.
- the outlet opening 15 and the projection 16 are so far eccentric arranged to the central axis of the cylinder that they are close lie on the wall of the cylinder 17. Otherwise corresponds this embodiment the embodiment according to Fig. 4.
- the outlet opening 18 and the projection 19 also asymmetrical so that their axial cut contours largely correspond to each other, and both even closer than in the embodiment according to Fig. 5 arranged on the wall of the cylinder 17.
- the arrangement of the outlet opening 18 in the immediate vicinity of the inside of the Cylinder 17 enables both the outlet opening 18th as well as the suction opening, not shown in the Form valve plate 2 with a larger diameter.
- the projection 10, 16, 19 at least about 45% of the volume of the outlet opening Fill in 11, 15, 18.
- FIG. 7 illustrates the determination of the free cross-sectional area of the flow channel for a given Position of the piston 1 using the example of that shown in Fig.4 rotationally symmetrical shape of outlet opening 11 and piston projection 12. Below the free cross-sectional area is generally that for the outflowing gas Available and by the "clear width" of the Flow channel determined the smallest geometric cross-sectional area to understand.
- the free cross-sectional area can be calculated for different Gradients of the axial cut edges of the outlet opening 11 and piston projection 12 are determined.
- a Set of points 24 On the axial cut edges of the outlet opening 11 over the entire height of the valve plate 2 a Set of points 24.
- a Set of points 24 On the axial cut edges of the projection 12 several points 25 set.
- d eff 2 a ⁇ d this results in an effective diameter d eff of the flow channel for a distance a.
- d eff can be thought of as the diameter of a circular opening that has the same cross-sectional area as the annular gap between the inside of the outlet opening and the piston projection.
- the free cross-sectional area A of the flow channel 12 for a given piston position is determined from the overall smallest value d eff min of the effective diameter after values have been determined for each point 24 along the inside of the outlet opening in accordance with the described procedure.
- A d 2 / eff min ⁇ ⁇ / 4 results.
- the respective volume V of the pressure chamber includes this free volume in the cylinder and the volume of the dead space to the upper end surface of the valve plate 2.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Compressor (AREA)
Description
- Fig. 1
- einen vergrößerten Axialschnitt durch einen Teil einer Kolben-Zylinder-Einheit eines bekannten Axialkolben-Kältemittelverdichters im Bereich eines Druckventils,
- Fig. 2
- einen der Fig. 1 entsprechenden Axialschnitt eines weiteren bekannten Axialkolben-Kältemittelverdichters mit einem stirnseitigen Vorsprung des Kolbens,
- Fig. 3
- einen der Fig. 1 entsprechenden Axialschnitt einer Kolben-Zylinder-Einheit eines ersten Ausführungsbeispiels eines erfindungsgemäßen Kältemittelverdichters,
- Fig. 4
- einen Axialschnitt durch eine KolbenZylinder-Einheit eines gegenüber dem Ausführungsbeispiel nach Fig. 3 etwas abgewandelten Ausführungsbeispiels eines erfindungsgemäßen Kältemittelverdichters,
- Fig. 5
- ebenfalls einen den vorhergehenden Figuren entsprechenden Axialschnitt eines Teils einer Kolben-Zylinder-Einheit eines dritten Ausführungsbeispiels eines erfindungsgemäßen Kältemittelverdichters,
- Fig. 6
- ebenfalls einen den vorhergehenden Figuren entsprechenden Axialschnitt eines Teils einer Kolben-Zylinder-Einheit eines vierten Ausführungsbeispiels eines erfindungsgemäßen Kältemittelverdichters.
- Fig. 7
- einen der Fig. 4 entsprechenden Axialschnitt einer Kolben-Zylinder-Einheit zur Verdeutlichung der Bestimmung der freien Querschnittsfläche des Durchflusskanals.
- Fig. 8
- einen der Fig. 3 entsprechenden Axialschnitt einer Kolben-Zylinder-Einheit mit zwei unterschiedlichen Kolbenpositionen.
Der Punkt 24 auf der Axialschnittkante der Auslassöffnung 11 wird nun in entsprechender Weise mit allen Punkten 25 des Vorsprungs verbunden, und es werden Werte für deff bestimmt. Der kleinste gefundene Wert entspricht dem effektiven Durchmesser des Durchflusskanals für diesen betreffenden Punkt 24.
Claims (6)
- Axialkolben-Kältemittelverdichter mit mindestens einer Kolben-Zylinder-Einheit, deren Zylinder (17) durch eine Ventilplatte (2) abgeschlossen ist, die mindestens ein Druckventil (3) mit einer Auslaßöffnung (11; 15; 18) aufweist, wobei ein Vorsprung (10; 16; 19) des Kolbens (1) in die Auslaßöffnung (11; 15; 18) ragt, wenn sich der Kolben (1) in der Nähe seines oberen Totpunkts befindet, dadurch gekennzeichnet, daß die Auslaßöffnung (11; 15; 18), der Kolbenvorsprung (10; 16; 19), die Innenseite (7) der Ventilplatte (2) und die Stirnfläche (8) des Kolbens (1) einen Durchflußkanal (12) mit wenigstens über den größten Teil seines Umfangs stetigem Verlauf seiner Axialschnittkanten begrenzen, daß die freie Querschnittsfläche des Durchflußkanals (12) so lange durch die kleinste Querschnittsfläche der Auslaßöffnung (11; 15; 18) bestimmt ist, bis der Kolben (1) während seines Druckhubs eine Position erreicht hat, die um mindestens die Höhe (H) der Auslaßöffnung (11; 15; 18) unter dem oberen Totpunkt liegt, daß während des weiteren Druckhubs des Kolbens (1) die relative Abnahme der freien Querschnittsfläche des Durchflußkanals (12) geringer als die relative Abnahme des Volumens des Druckraums im Zylinder (17) ist und daß mindestens 45% des Volumens der Auslaßöffnung (11; 15; 18) im oberen Totpunkt des Kolbens (1) durch den Vorsprung ausgefüllt sind.
- Axialkolben-Kältemittelverdichter nach Anspruch 1, dadurch gekennzeichnet, daß die Querschnittsfläche der Auslaßöffnung (11; 15; 18) zur Außenseite der Ventilplatte (2) hin abnimmt, daß die Querschnittsfläche des Vorsprungs (10; 16; 19) zu seinem freien Ende hin abnimmt und daß die Querschnittsflächen der Auslaßöffnung (11; 15; 18) und des Vorsprungs (10; 16; 19) sich derartig in Axialrichtung ändern, daß sich die freie Querschnittsfläche des Durchflußkanals (12) während der Kolbenbewegung zum oberen Totpunkt weniger ändert als das verbleibende Volumen des Druckraums im Zylinder (17).
- Axialkolben-Kältemittelverdichter nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß während des Druckhubs des Kolbens (1) der Strömungswiderstand des Durchflußkanals durch die kleinste Querschnittsfläche der Auslaßöffnung (11; 15; 18) bestimmt ist, bis das freie Ende des Kolbenvorsprungs (10; 16; 19) mit der Innenseite (7) der Ventilplatte (2) fluchtet.
- Axialkolben-Kältemittelverdichter nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß während des Druckhubs des Kolbens (1) der Strömungswiderstand des Durchflußkanals (12) durch die kleinste Querschnittsfläche der Auslaßöffnung (11; 15; 18) bestimmt ist, bis 50% der Höhe des Kolbenvorsprungs (10; 16; 19) in die Auslaßöffnung (11; 15; 18) eingedrungen sind.
- Axialkolben-Kältemittelverdichter nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß ein Axialschnitt durch die Auslaßöffnung (11; 15) der Ventilplatte (2) und den Kolbenvorsprung (10; 16) gekrümmte Schnittkanten aufweist.
- Axialkolben-Kältemittelverdichter nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß die Übergänge (13; 14) zwischen der Ventilplattenoberfläche und der Auslaßöffnung (11; 15; 18) und der Übergang zwischen der Kolbenstirnfläche (8) und dem Vorsprung (10; 16) stetig sind, wobei der Übergang (13) zwischen Auslaßöffnung (11; 15; 18) und Ventilsitz (5) und der Übergang zwischen Vorsprung (10; 16; 19) und Kolbenstirnfläche (8) abgerundet sind.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19923611 | 1999-05-25 | ||
| DE19923611 | 1999-05-25 | ||
| PCT/DK2000/000271 WO2000071896A1 (de) | 1999-05-25 | 2000-05-22 | Axialkolben-kältemittelverdichter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1180214A1 EP1180214A1 (de) | 2002-02-20 |
| EP1180214B1 true EP1180214B1 (de) | 2003-08-13 |
Family
ID=7908914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00929315A Expired - Lifetime EP1180214B1 (de) | 1999-05-25 | 2000-05-22 | Axialkolben-kältemittelverdichter |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US6623258B1 (de) |
| EP (1) | EP1180214B1 (de) |
| AU (1) | AU4744300A (de) |
| DE (1) | DE50003277D1 (de) |
| WO (1) | WO2000071896A1 (de) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AUPQ489799A0 (en) * | 1999-12-24 | 2000-02-03 | Orbital Engine Company (Australia) Proprietary Limited | Improved fluid compressor |
| KR100922213B1 (ko) * | 2003-06-13 | 2009-10-20 | 엘지전자 주식회사 | 밀폐형 압축기 |
| TR200601184T1 (tr) * | 2003-07-31 | 2006-08-21 | Ar�El�K Anon�M ��Rket� | Bir kompresör |
| US7654283B2 (en) * | 2003-10-21 | 2010-02-02 | Seiko Epson Corporation | Check valve and pump including check valve |
| KR100774485B1 (ko) | 2005-08-26 | 2007-11-08 | 엘지전자 주식회사 | 압축기 |
| ES2547407T3 (es) | 2008-05-01 | 2015-10-06 | Arçelik Anonim Sirketi | Compresor con rendimiento de flujo refrigerante mejorado |
| DE102008036999B4 (de) * | 2008-08-07 | 2012-03-29 | Danfoss Household Compressors Gmbh | Kältemittelkompressor, Kolben eines Kältemittelkompressors und Kolbenanordnung |
| JP5533061B2 (ja) * | 2009-06-12 | 2014-06-25 | パナソニック株式会社 | 密閉型圧縮機および冷凍装置 |
| KR101660537B1 (ko) * | 2010-06-14 | 2016-09-27 | 한온시스템 주식회사 | 압축기 |
| KR101261136B1 (ko) | 2010-12-16 | 2013-05-06 | 한라비스테온공조 주식회사 | 압축기 |
| JP5828136B2 (ja) * | 2011-08-08 | 2015-12-02 | パナソニックIpマネジメント株式会社 | 密閉型圧縮機 |
| GB2499336A (en) * | 2013-04-19 | 2013-08-14 | Vilis Ivars Lietuvietis | Interior heat exchanger for reciprocating gas compressor |
| JP6876463B2 (ja) * | 2017-02-24 | 2021-05-26 | 株式会社前川製作所 | 圧縮機用ピストン、圧縮機及びヒートポンプユニット |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE527635C (de) | 1929-03-11 | 1931-06-20 | John Frederick Nevinson Craig | Kuehlvorrichtung fuer Kolbenmaschinen, insbesondere Luftkompressoren |
| US2190537A (en) * | 1937-05-03 | 1940-02-13 | Wiebicke Paul | Diesel motor |
| DE1257578B (de) | 1961-03-17 | 1967-12-28 | Halbergerhuette G M B H | Fluessigkeitskolbenpumpe |
| DE3032009A1 (de) | 1980-08-25 | 1982-03-04 | Dienes Werke für Maschinenteile GmbH & Co KG, 5063 Overath | Kolbenverdichter fuer kleinkaeltemaschinen |
| IT1200677B (it) | 1984-07-27 | 1989-01-27 | Enfo Grundlagen Forschungs Ag | Compressore alternativo con una valvola combinata di aspirazione e di mandata |
| US5203857A (en) * | 1990-06-01 | 1993-04-20 | Bristol Compressors, Inc. | Gas compressor head and discharge valve construction |
| US5149254A (en) | 1991-06-06 | 1992-09-22 | White Consolidated Industries, Inc. | Refrigeration compressor having a contoured piston |
| US5816783A (en) * | 1993-05-19 | 1998-10-06 | Hitachi, Ltd. | Electrically driven hermetic compressor |
| EP0645529B1 (de) * | 1993-09-28 | 1998-01-07 | Isuzu Ceramics Research Institute Co., Ltd. | Maschine mit thermischer Isolation |
| DE19515217C2 (de) | 1995-04-28 | 1999-03-11 | Danfoss Compressors Gmbh | Kältemittelverdichter |
-
2000
- 2000-05-22 AU AU47443/00A patent/AU4744300A/en not_active Abandoned
- 2000-05-22 WO PCT/DK2000/000271 patent/WO2000071896A1/de not_active Ceased
- 2000-05-22 US US10/009,667 patent/US6623258B1/en not_active Expired - Fee Related
- 2000-05-22 EP EP00929315A patent/EP1180214B1/de not_active Expired - Lifetime
- 2000-05-22 DE DE50003277T patent/DE50003277D1/de not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| WO2000071896A1 (de) | 2000-11-30 |
| DE50003277D1 (de) | 2003-09-18 |
| AU4744300A (en) | 2000-12-12 |
| EP1180214A1 (de) | 2002-02-20 |
| US6623258B1 (en) | 2003-09-23 |
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