EP2064445B1 - Reciprocating piston compressor - Google Patents

Reciprocating piston compressor Download PDF

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Publication number
EP2064445B1
EP2064445B1 EP07788285A EP07788285A EP2064445B1 EP 2064445 B1 EP2064445 B1 EP 2064445B1 EP 07788285 A EP07788285 A EP 07788285A EP 07788285 A EP07788285 A EP 07788285A EP 2064445 B1 EP2064445 B1 EP 2064445B1
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EP
European Patent Office
Prior art keywords
compressor
cylinder
end wall
compressor according
leaf spring
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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.)
Not-in-force
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EP07788285A
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German (de)
French (fr)
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EP2064445A1 (en
Inventor
Marco Giacchi
Thorsten Kusnik
Jan-Grigor Schubert
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BSH Hausgeraete GmbH
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BSH Bosch und Siemens Hausgeraete GmbH
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Publication of EP2064445A1 publication Critical patent/EP2064445A1/en
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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
    • 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

Definitions

  • the present invention relates to a compressor having a cylinder which includes a compression chamber of circular cross-section in which a reciprocating piston is reciprocally movable.
  • Inlet and outlet openings for a medium to be compressed are often both arranged on an end wall of the cylinder.
  • the piston in the compression chamber must not be rotatable about its longitudinal axis.
  • a conventional, driven by a rotating engine via a crank mechanism reciprocating piston this is not a problem.
  • rotation of the piston about the longitudinal axis is not excluded. If such a rotatable piston is provided with a projection in the manner described above, there is a risk that the projection after a rotation of the piston no longer hits the outlet opening and instead strikes against the end wall of the cylinder, resulting in the destruction of the compressor can. See also GB 392,811 with the state of the art.
  • the object of the invention is to provide a compressor which achieves high efficiency, without a rotation of the piston in the compressor chamber about its longitudinal axis must be constructively excluded.
  • the latter preferably has a non-circular cross-section whose dimension in the circumferential direction of the cylinder is greater than in the radial direction.
  • the inlet opening may have a cross section in the form of a circular arc.
  • a plurality of inlet openings distributed around the outlet opening may be provided. These are expediently distributed along a circular arc.
  • the circular arc is expediently concentric to the longitudinal axis. Preferably, it extends over an angle of less than 180 °. The latter is particularly useful in order to shut off the entire inlet cross-section with a single shut-off.
  • shut-off body is preferably acted upon by a arranged in the compression chamber first leaf spring against the inlet opening.
  • the outlet opening In order to prevent the leaf spring blocking the outlet opening, it is preferably provided with an opening through which the longitudinal axis of the cylinder extends.
  • a second shut-off body is preferably acted upon by a arranged on the outside of the end wall second leaf spring against the outlet opening.
  • each leaf spring is held by at least two rivets to prevent twisting of the leaf spring, which could cause the locking body no longer properly obscured the associated opening.
  • Fig. 1 shows by way of example the construction of a linear compressor for a refrigeration device, which represents a preferred application of the invention.
  • the linear compressor has a rigid, in plan view approximately U-shaped frame, which is composed of two flat wall pieces 1 and a sheet 2. Between two mutually facing end sides of the sheet 2 and the two wall pieces 1, a first diaphragm spring 3 is clamped, a second diaphragm spring 4 of the same shape as the diaphragm spring 3 is fixed to the side facing away from the sheet 2 of the wall pieces 1.
  • the stamped from spring plate diaphragm springs 3, 4 each have four spring arms 5, which extend in a zigzag from the wall pieces 1 to a central portion 6, with which they meet.
  • the central portion 6 has two holes, two outer to which by means of screws or rivets 7, a permanent magnetic oscillating body 8 is suspended, and a central bore, through which in the diaphragm spring 3 a to the oscillating body 8 z.
  • B. fastened by screwing Piston rod 10 extends.
  • the piston rod 10 connects the oscillating body 8 with a reciprocating piston, not visible in the figure, in the interior of a cylinder 15, which is carried by the arch 2.
  • Refrigerant inlet and outlet ports of the pumping chamber are designated 16 and 17, respectively.
  • Two electromagnets 9 with E-shaped yoke and a wound around the middle leg of the E coil are each arranged between the oscillating body 8 and the wall pieces 1 with the oscillating body 8 pole pieces and serve to drive a swinging motion of the oscillating body 8.
  • a control circuit 37 supplies the Electromagnets 9 with an alternating current, whose frequency is adapted to the natural frequency of the oscillatory system, which is formed by the diaphragm springs 3, 4, the oscillating body 8 and driven by him lifting piston.
  • the cylinder 15 is, as in Fig. 1 recognizable, divided into a main body 11 in which the reciprocating piston is guided to and fro, a valve plate 12 which forms an end wall of a recessed in the main body compressor chamber, and a cap 13, on which the inlet and outlet ports 16, 17 are located ,
  • the structure of the cylinder is clearer by the exploded view of the Fig. 2 ,
  • the main body 11 is in the Fig. 2 omitted; the outline of the compressor chamber extending in the main body is indicated on the valve plate 12 as a dashed circle 14.
  • the longitudinal axis of the compression chamber is shown in dash-dotted line.
  • a circular outlet bore 18 is arranged exactly coaxially with the longitudinal axis.
  • a circular arc-shaped slot extends about an angle of about 120 ° around the outlet bore 18 around and forms an inlet opening 19 of the compression chamber.
  • an opening 28 is cut, which, when the leaf spring 23 is riveted to the valve plate 12, the outlet hole 18 leaves free.
  • the tongue 27 of the leaf spring 22 abuts against the outlet bore 18 from the outside, with its tip acting as a shut-off valve of the outlet valve.
  • the interior of the cap 13 is divided by an intermediate wall 29 into a suction-side cavity 30 and a pressure-side cavity 31, to which the refrigerant inlet nozzle 16 or outlet nozzle 17 opens and which communicate with the compressor chamber via the inlet opening 19 and the outlet bore 18, respectively.
  • the designated piston 32 has at its in the perspective of Fig. 2 Side facing away from the viewer to a longitudinal axis concentric projection 33 whose length and diameter of the common thickness of the valve plate 12 and the leaf spring 23 and the diameter of the outlet bore 18 correspond. At a top dead center of the movement of the reciprocating piston 32 when it almost touches the leaf spring 23 pressed against the valve plate 12 by the pressure prevailing in the compression chamber, the projection 33 enters the outlet bore 18 and displaces residual gas contained therein.
  • Fig. 3 shows a section through the main body 11 of the compression chamber and the reciprocating piston 32. It can be seen that the compression chamber 14 is surrounded by an annular cavity 34 which communicates with the compression chamber 14 through a plurality of small openings 35.
  • the cavity 34 extends in the longitudinal direction of the compression chamber 14 from the top to bottom dead center of the reciprocating piston 32. It is via a bore 36 of the valve plate 12 with the pressure-side cavity 31 of the cap 13 connected and fed in this way with compressed refrigerant that penetrates in small quantities through the openings 35 in the compression chamber 14 and so between the walls and the reciprocating piston 32 forms a gas cushion on which the reciprocating piston 32 is friction and low-wear movable.

Description

Die vorliegende Erfindung betrifft einen Verdichter mit einem Zylinder, der eine Verdichterkammer von kreisrundem Querschnitt enthält, in der ein Hubkolben hin und her beweglich ist. Ein- und Auslassöffnungen für ein zu verdichtendes Medium sind häufig beide an einer Stirnwand des Zylinders angeordnet. Um den Öffnungen einen im Verhältnis zum Durchmesser der Stirnwand möglichst großen Durchmesser geben zu können, sind sie meist auf verschiedenen Seiten einer die Stirnwand diametral kreuzenden imaginären Mittelebene angeordnet.The present invention relates to a compressor having a cylinder which includes a compression chamber of circular cross-section in which a reciprocating piston is reciprocally movable. Inlet and outlet openings for a medium to be compressed are often both arranged on an end wall of the cylinder. In order to be able to give the openings a diameter which is as large as possible in relation to the diameter of the end wall, they are usually arranged on different sides of an imaginary center plane crossing the end wall diametrically.

Um einen hohen Wirkungsgrad des Verdichters zu erzielen, muss dessen Totvolumen so klein wie möglich sein. Es ist daher bekannt, an einem Hubkolbenverdichter die der Stirnwand zugewandte Oberfläche des Kolbens mit einem Vorsprung zu versehen, der am oberen Totpunkt des Kolbens in die Auslassöffnung eingreift, um darin enthaltenes Medium so vollständig wie möglich aus der Verdichterkammer auszutreiben.To achieve a high efficiency of the compressor, its dead volume must be as small as possible. It is therefore known to provide on a reciprocating compressor, the end wall facing surface of the piston with a projection which engages the top dead center of the piston in the outlet opening to expel medium contained therein as completely as possible from the compressor chamber.

Damit der Vorsprung des Kolbens zuverlässig in die Auslassöffnung einrücken kann, darf der Kolben in der Verdichterkammer nicht um deren Längsachse drehbar sein. Bei einem herkömmlichen, von einem rotierenden Motor über einen Kurbeltrieb angetriebenen Hubkolben ist dies kein Problem. Bei neueren Verdichterbauformen, wie etwa bei dem aus US 6 506 032 B2 bekannten Linearverdichter, ist eine Drehung des Kolbens um die Längsachse nicht ausgeschlossen. Wenn ein solcher drehbarer Kolben in der oben beschriebenen Weise mit einem Vorsprung versehen ist, besteht die Gefahr, dass der Vorsprung nach einer Drehung des Kolbens nicht mehr in die Auslassöffnung trifft und statt dessen gegen die Stirnwand des Zylinders schlägt, was zur Zerstörung des Verdichters führen kann. Siehe auch GB 392 811 mit dem nächten Stand der Technik.So that the projection of the piston can reliably engage in the outlet opening, the piston in the compression chamber must not be rotatable about its longitudinal axis. In a conventional, driven by a rotating engine via a crank mechanism reciprocating piston this is not a problem. In newer compressor designs, such as in the US Pat. No. 6,506,032 B2 known linear compressor, rotation of the piston about the longitudinal axis is not excluded. If such a rotatable piston is provided with a projection in the manner described above, there is a risk that the projection after a rotation of the piston no longer hits the outlet opening and instead strikes against the end wall of the cylinder, resulting in the destruction of the compressor can. See also GB 392,811 with the state of the art.

Aufgabe der Erfindung ist, einen Verdichter anzugeben, der einen hohen Wirkungsgrad erreicht, ohne dass eine Drehung des Kolbens in der Verdichterkammer um deren Längsachse konstruktiv ausgeschlossen werden muss.The object of the invention is to provide a compressor which achieves high efficiency, without a rotation of the piston in the compressor chamber about its longitudinal axis must be constructively excluded.

Die Aufgabe wird in Anspruch 1 dadurch gelöst, dass bei einem Verdichter mit einem Zylinder, in dem eine Verdichterkammer von kreisrundem Querschnitt gebildet ist und in einer Stirnwand des Zylinders Ein- und Auslassöffnungen für ein zu verdichtendes Medium gebildet sind, und einem in der Verdichterkammer hin und her beweglichen Hubkolben, der an seiner der Stirnwand zugewandten Oberfläche einen Austreibervorsprung trägt, der in einer Totpunktstellung des Kolbens in die Auslassöffnung eingreift, die Längsachse des Zylinders durch die Auslassöffnung verläuft. Als Längsachse soll die Zentrumsachse verstanden sein.The object is achieved in claim 1, characterized in that in a compressor with a cylinder in which a compression chamber is formed by a circular cross-section and in an end wall the inlet and outlet openings are formed for a medium to be compressed, and a reciprocating in the compression chamber reciprocating piston, which carries on its end wall surface facing a Austreibervorsprung, which engages in a dead center position of the piston in the outlet, the longitudinal axis of the Cylinder passes through the outlet opening. As a longitudinal axis should be understood the center axis.

Um trotz der zentralen Platzierung der Auslassöffnung einen großen Querschnitt der Einlassöffnung zu realisieren, hat letztere vorzugsweise einen unrunden Querschnitt, dessen Abmessung in Umfangsrichtung des Zylinders größer ist als in radialer Richtung.In order to realize a large cross section of the inlet opening in spite of the central placement of the outlet opening, the latter preferably has a non-circular cross-section whose dimension in the circumferential direction of the cylinder is greater than in the radial direction.

Insbesondere kann die Einlassöffnung einen Querschnitt in Form eines Kreisbogens aufweisen.In particular, the inlet opening may have a cross section in the form of a circular arc.

Alternativ können eine Mehrzahl von um die Auslassöffnung herum verteilten Einlassöffnungen vorgesehen sein. Auch diese sind zweckmäßigerweise entlang eines Kreisbogens verteilt.Alternatively, a plurality of inlet openings distributed around the outlet opening may be provided. These are expediently distributed along a circular arc.

Der Kreisbogen ist zweckmäßigerweise zur Längsachse konzentrisch. Vorzugsweise erstreckt er sich über einen Winkel von weniger als 180°. Letzteres ist insbesondere sinnvoll, um den gesamten Einlassquerschnitt mit einem einzigen Absperrkörper absperren zu können.The circular arc is expediently concentric to the longitudinal axis. Preferably, it extends over an angle of less than 180 °. The latter is particularly useful in order to shut off the entire inlet cross-section with a single shut-off.

Ein solcher Absperrkörper ist vorzugsweise durch eine in der Verdichterkammer angeordnete erste Blattfeder gegen die Einlassöffnung beaufschlagt.Such a shut-off body is preferably acted upon by a arranged in the compression chamber first leaf spring against the inlet opening.

Um die Biegebelastung der Blattfeder im Betrieb klein zu halten, ist es zweckmäßig, diese im Verhältnis zu den radialen Abmessungen des Verdichters möglich lang zu machen. Hierfür ist es insbesondere zweckmäßig, wenn die Blattfeder an einem der Einlassöffnung diametral gegenüberliegenden Ort der Stirnwand befestigt ist.In order to keep the bending load of the leaf spring in operation small, it is expedient to make this possible in relation to the radial dimensions of the compressor possible long. For this purpose, it is particularly expedient if the leaf spring is fastened to a location of the end wall which is diametrically opposed to the inlet opening.

Um zu verhindern, dass die Blattfeder die Auslassöffnung versperrt, ist sie vorzugsweise mit einer Öffnung versehen, durch die die Längsachse des Zylinders verläuft.In order to prevent the leaf spring blocking the outlet opening, it is preferably provided with an opening through which the longitudinal axis of the cylinder extends.

Ein zweiter Absperrkörper ist vorzugsweise durch eine an der Außenseite der Stirnwand angeordnete zweite Blattfeder gegen die Auslassöffnung beaufschlagt.A second shut-off body is preferably acted upon by a arranged on the outside of the end wall second leaf spring against the outlet opening.

Der Zusammenbau des Verdichters ist vereinfacht, wenn erste und zweite Blattfeder durch wenigstens eine gemeinsame Niete an der Stirnwand befestigt sind. Vorzugsweise ist jede Blattfeder von wenigstens zwei Nieten gehalten, um eine Verdrehung der Blattfeder zu verhindern, die dazu führen könnte, dass der Sperrkörper die zugeordnete Öffnung nicht mehr korrekt verdeckt.The assembly of the compressor is simplified when first and second leaf springs are secured to the bulkhead by at least one common rivet. Preferably, each leaf spring is held by at least two rivets to prevent twisting of the leaf spring, which could cause the locking body no longer properly obscured the associated opening.

Weitere Merkmale und Vorteile der Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen unter Bezugnahme auf die beigefügten Figuren.Further features and advantages of the invention will become apparent from the following description of embodiments with reference to the accompanying figures.

Es zeigen:

Fig. 1
eine perspektivische Ansicht eines erfindungsgemäßen Linearverdichters;
Fig. 2
eine auseinandergezogene Ansicht von Teilen des Verdichters aus Fig. 1; und
Fig. 3
einen Schnitt durch den Zylinder des Verdichters aus Fig. 1.
Show it:
Fig. 1
a perspective view of a linear compressor according to the invention;
Fig. 2
an exploded view of parts of the compressor Fig. 1 ; and
Fig. 3
a section through the cylinder of the compressor Fig. 1 ,

Fig. 1 zeigt beispielhaft den Aufbau eines Linearverdichter für ein Kältegerät, der eine bevorzugte Anwendung der Erfindung darstellt. Der Linearverdichter hat einen steifen, in Draufsicht in etwa U-förmigen Rahmen, der aus zwei flachen Wandstücken 1 und einem Bogen 2 zusammengesetzt ist. Zwischen einander zugewandten Stirnseiten des Bogens 2 und der zwei Wandstücke 1 ist eine erste Membranfeder 3 eingespannt, eine zweite Membranfeder 4 von gleicher Gestalt wie die Membranfeder 3 ist an von dem Bogen 2 abgewandten Stirnseiten der Wandstücke 1 befestigt. Fig. 1 shows by way of example the construction of a linear compressor for a refrigeration device, which represents a preferred application of the invention. The linear compressor has a rigid, in plan view approximately U-shaped frame, which is composed of two flat wall pieces 1 and a sheet 2. Between two mutually facing end sides of the sheet 2 and the two wall pieces 1, a first diaphragm spring 3 is clamped, a second diaphragm spring 4 of the same shape as the diaphragm spring 3 is fixed to the side facing away from the sheet 2 of the wall pieces 1.

Die aus Federblech gestanzten Membranfedern 3, 4 haben jeweils vier Federarme 5, die sich im Zickzack von den Wandstücken 1 zu einem Mittelabschnitt 6 erstrecken, mit dem sie zusammentreffen. Der Mittelabschnitt 6 weist jeweils zwei Bohrungen auf, zwei äußere, an denen mit Hilfe von Schrauben oder Nieten 7 ein permanent magnetischer Schwingkörper 8 aufgehängt ist, und eine mittlere Bohrung, durch die sich bei der Membranfeder 3 eine an dem Schwingkörper 8 z. B. durch Verschraubung befestigte Kolbenstange 10 erstreckt. Die Kolbenstange 10 verbindet den Schwingkörper 8 mit einem in der Fig. nicht sichtbaren Hubkolben im Inneren eines Zylinders 15, der von dem Bogen 2 getragen ist. Kältemitteleinlass und -auslassstutzen der Pumpkammer sind mit 16 bzw. 17 bezeichnet.The stamped from spring plate diaphragm springs 3, 4 each have four spring arms 5, which extend in a zigzag from the wall pieces 1 to a central portion 6, with which they meet. The central portion 6 has two holes, two outer to which by means of screws or rivets 7, a permanent magnetic oscillating body 8 is suspended, and a central bore, through which in the diaphragm spring 3 a to the oscillating body 8 z. B. fastened by screwing Piston rod 10 extends. The piston rod 10 connects the oscillating body 8 with a reciprocating piston, not visible in the figure, in the interior of a cylinder 15, which is carried by the arch 2. Refrigerant inlet and outlet ports of the pumping chamber are designated 16 and 17, respectively.

Zwei Elektromagnete 9 mit E-förmigen Joch und einer um den mittleren Schenkel des E gewickelten Spule sind jeweils zwischen dem Schwingkörper 8 und den Wandstücken 1 mit dem Schwingkörper 8 zugewandten Polschuhen angeordnet und dienen zum Antreiben einer Schwingbewegung des Schwingkörpers 8. Eine Steuerschaltung 37 versorgt die Elektromagnete 9 mit einem Wechselstrom, dessen Frequenz an die Eigenfrequenz des schwingfähigen Systems angepasst ist, welches durch die Membranfedern 3, 4, den Schwingkörper 8 und den von ihm angetriebenen Hubkolben gebildet ist.Two electromagnets 9 with E-shaped yoke and a wound around the middle leg of the E coil are each arranged between the oscillating body 8 and the wall pieces 1 with the oscillating body 8 pole pieces and serve to drive a swinging motion of the oscillating body 8. A control circuit 37 supplies the Electromagnets 9 with an alternating current, whose frequency is adapted to the natural frequency of the oscillatory system, which is formed by the diaphragm springs 3, 4, the oscillating body 8 and driven by him lifting piston.

Der Zylinder 15 ist, wie in Fig. 1 erkennbar, gegliedert in einen Hauptkörper 11, in welchem der Hubkolben hin und her beweglich geführt ist, eine Ventilplatte 12, die eine Stirnwand einer im Hauptkörper ausgesparten Verdichterkammer bildet, und eine Kappe 13, an der sich die Ein- und Auslassstutzen 16, 17 befinden.The cylinder 15 is, as in Fig. 1 recognizable, divided into a main body 11 in which the reciprocating piston is guided to and fro, a valve plate 12 which forms an end wall of a recessed in the main body compressor chamber, and a cap 13, on which the inlet and outlet ports 16, 17 are located ,

Der Aufbau des Zylinders wird deutlicher anhand der auseinandergezogenen Darstellung der Fig. 2. Der Hauptkörper 11 ist in der Fig. 2 weggelassen; der Umriss der sich in dem Hauptkörper erstreckenden Verdichterkammer ist an der Ventilplatte 12 als gestrichelter Kreis 14 angedeutet. Die Längsachse der Verdichterkammer ist als strichpunktierte Linie eingezeichnet. In der Ventilplatte 12 ist eine kreisrunde Auslassbohrung 18 exakt koaxial zu der Längsachse angeordnet. Ein kreisbogenförmiger Schlitz erstreckt sich über einen Winkel von hier etwa 120° um die Auslassbohrung 18 herum und bildet eine Einlassöffnung 19 der Verdichterkammer.The structure of the cylinder is clearer by the exploded view of the Fig. 2 , The main body 11 is in the Fig. 2 omitted; the outline of the compressor chamber extending in the main body is indicated on the valve plate 12 as a dashed circle 14. The longitudinal axis of the compression chamber is shown in dash-dotted line. In the valve plate 12, a circular outlet bore 18 is arranged exactly coaxially with the longitudinal axis. A circular arc-shaped slot extends about an angle of about 120 ° around the outlet bore 18 around and forms an inlet opening 19 of the compression chamber.

Weitere Bohrungen 20 an den Ecken der Ventilplatte 12 sind vorgesehen, um nicht dargestellte Schrauben aufzunehmen, mit denen die Ventilplatte 12 und die Kappe 13 am Hauptkörper 11 befestigt werden. Zwei weitere Bohrungen 21 dienen zur Befestigung von zwei Blattfedern 22 bzw. 23 an der Ventilplatte 12 mit Hilfe von Nieten 24. Die Blattfedern 22, 23 bilden zusammen mit der Einlassöffnung 19 bzw. der Auslassbohrung 18 jeweils Ein- und Auslassventile der Verdichterkammer. Die Blattfedern 22, 23 haben jeweils einen langgestreckten Fuß 25, in dem zu den Bohrungen 21 komplementäre Löcher 26 für die Nieten 24 gebildet sind, und eine von dem Fuß zur Längsachse hin abstehende elastische Zunge 27.Further holes 20 at the corners of the valve plate 12 are provided to receive screws, not shown, with which the valve plate 12 and the cap 13 are secured to the main body 11. Two further bores 21 serve for fastening two leaf springs 22 and 23 to the valve plate 12 with the aid of rivets 24. The leaf springs 22, 23 together with the inlet opening 19 and the outlet bore 18 respectively inlet and outlet valves of the compressor chamber. The leaf springs 22, 23 each have one elongate foot 25, in which to the holes 21 complementary holes 26 are formed for the rivets 24, and projecting from the foot to the longitudinal axis outwardly elastic tongue 27th

In die Zunge 27 der Blattfeder 23 ist eine Öffnung 28 geschnitten, die, wenn die Blattfeder 23 an der Ventilplatte 12 vernietet ist, die Auslassbohrung 18 frei lässt. Ein Endabschnitt 38 der Zunge 27, der sich bogenförmig um die Öffnung 28 erstreckt, bildet einen Absperrkörper des Einlassventils, der in entspanntem Zustand der Blattfeder 23 die Einlassöffnung 19 abdeckt.In the tongue 27 of the leaf spring 23, an opening 28 is cut, which, when the leaf spring 23 is riveted to the valve plate 12, the outlet hole 18 leaves free. An end portion 38 of the tongue 27, which extends in an arc around the opening 28, forms a shut-off body of the inlet valve, which covers the inlet opening 19 in the relaxed state of the leaf spring 23.

Die Zunge 27 der Blattfeder 22 liegt von außen an der Auslassbohrung 18 an, wobei ihre Spitze als Absperrkörper des Auslassventils fungiert.The tongue 27 of the leaf spring 22 abuts against the outlet bore 18 from the outside, with its tip acting as a shut-off valve of the outlet valve.

Das Innere der Kappe 13 ist durch eine Zwischenwand 29 in einen saugseitigen Hohlraum 30 und einen druckseitigen Hohlraum 31 unterteilt, auf die der Kältemitteleinlassstutzen 16 bzw. -auslassstutzen 17 münden und die mit der Verdichterkammer über die Einlassöffnung 19 bzw. die Auslassbohrung 18 kommunizieren.The interior of the cap 13 is divided by an intermediate wall 29 into a suction-side cavity 30 and a pressure-side cavity 31, to which the refrigerant inlet nozzle 16 or outlet nozzle 17 opens and which communicate with the compressor chamber via the inlet opening 19 and the outlet bore 18, respectively.

Der mit 32 bezeichnete Hubkolben weist an seiner in der Perspektive der Fig. 2 vom Betrachter abgewandten Seite einen zur Längsachse konzentrischen Vorsprung 33 auf, dessen Länge und Durchmesser der gemeinsamen Dicke der Ventilplatte 12 und der Blattfeder 23 bzw. dem Durchmesser der Auslassbohrung 18 entsprechen. An einem oberen Totpunkt der Bewegung des Hubkolbens 32, wenn dieser die vom in der Verdichterkammer herrschenden Druck gegen die Ventilplatte 12 gedrückte Blattfeder 23 nahezu berührt, rückt der Vorsprung 33 in die Auslassbohrung 18 ein und verdrängt darin enthaltenes Restgas.The designated piston 32 has at its in the perspective of Fig. 2 Side facing away from the viewer to a longitudinal axis concentric projection 33 whose length and diameter of the common thickness of the valve plate 12 and the leaf spring 23 and the diameter of the outlet bore 18 correspond. At a top dead center of the movement of the reciprocating piston 32 when it almost touches the leaf spring 23 pressed against the valve plate 12 by the pressure prevailing in the compression chamber, the projection 33 enters the outlet bore 18 and displaces residual gas contained therein.

Fig. 3 zeigt einen Schnitt durch den Hauptkörper 11 der Verdichterkammer und den Hubkolben 32. Man erkennt, dass die Verdichterkammer 14 von einem ringförmigen Hohlraum 34 umgeben ist, der mit der Verdichterkammer 14 durch eine Vielzahl von kleinen Öffnungen 35 kommuniziert. Der Hohlraum 34 erstreckt sich in Längsrichtung der Verdichterkammer 14 vom oberen bis zum unteren Totpunkt des Hubkolbens 32. Er ist über eine Bohrung 36 der Ventilplatte 12 mit dem druckseitigen Hohlraum 31 der Kappe 13 verbunden und auf diese Weise mit verdichtetem Kältemittel gespeist, das in kleinen Mengen durch die Öffnungen 35 in die Verdichterkammer 14 eindringt und so zwischen deren Wänden und dem Hubkolben 32 ein Gaskissen bildet, auf dem der Hubkolben 32 reibungs- und verschleißarm beweglich ist. Fig. 3 shows a section through the main body 11 of the compression chamber and the reciprocating piston 32. It can be seen that the compression chamber 14 is surrounded by an annular cavity 34 which communicates with the compression chamber 14 through a plurality of small openings 35. The cavity 34 extends in the longitudinal direction of the compression chamber 14 from the top to bottom dead center of the reciprocating piston 32. It is via a bore 36 of the valve plate 12 with the pressure-side cavity 31 of the cap 13 connected and fed in this way with compressed refrigerant that penetrates in small quantities through the openings 35 in the compression chamber 14 and so between the walls and the reciprocating piston 32 forms a gas cushion on which the reciprocating piston 32 is friction and low-wear movable.

Claims (8)

  1. Compressor with a cylinder (15), in which a compressor chamber (14) of circular cross-section is formed, wherein inlet and outlet openings (18, 19) for a medium to be compressed are formed in an end wall (12) of the cylinder (15), and a stroke piston (32), which is reciprocatingly movable in the compressor chamber (14) and which carries at its surface facing the end wall (12) an expulsion projection (33) which engages in the outlet opening (18) in a top dead centre setting of the stroke piston (32), wherein the longitudinal axis of the cylinder (15) extends through the outlet opening (18), characterised in that an inlet opening (19) has a cross-section in the form of an arc, the size of which in circumferential direction of the cylinder is greater than in radial direction or that inlet openings of a plurality are distributed along an arc about the outlet opening.
  2. Compressor according to claim 1, characterised in that the arc extends over an angle of less than 180°.
  3. Compressor according to one of the preceding claims, characterised in that a first blocking body (38) is loaded on towards the inlet opening (19) by a first leaf spring (23) arranged in the compressor chamber.
  4. Compressor according to claim 3, characterised in that the leaf spring (23) is fastened at a location, which is diametrically opposite the inlet opening (19), of the end wall (12).
  5. Compressor according to claim 4, characterised in that the leaf spring (23) has an opening (28) through which the longitudinal axis of the cylinder (15) extends.
  6. Compressor according to any one of the preceding claims, characterised in that a second blocking body (27) is loaded towards the outlet opening (18) by a second leaf spring (22) arranged at the outer side of the end wall.
  7. Compressor according to any one of claims 3 to 5 and claim 6, characterised in that the first and second leaf springs (22, 23) are fastened to the end wall (12) by at least one common rivet (24).
  8. Compressor according to any one of the preceding claims, characterised by a linear motor (1-9) for driving the movement of the piston (32).
EP07788285A 2006-09-07 2007-08-07 Reciprocating piston compressor Not-in-force EP2064445B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
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 (2)

Publication Number Publication Date
EP2064445A1 EP2064445A1 (en) 2009-06-03
EP2064445B1 true EP2064445B1 (en) 2012-10-10

Family

ID=38596318

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07788285A Not-in-force EP2064445B1 (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)

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* Cited by examiner, † Cited by third party
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GB392811A (en) * 1932-10-03 1933-05-25 Teves Kg Alfred Improvements in electromagnetically actuated gas compressors
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
JPH0450470Y2 (en) * 1987-04-16 1992-11-27
JPH04121477U (en) * 1991-04-16 1992-10-29 サンデン株式会社 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
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JP2912024B2 (en) * 1995-06-23 1999-06-28 エルジー電子株式会社 Refrigerant supply device for linear compressor
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WO2003001061A1 (en) * 2001-06-26 2003-01-03 Lg Electronics Inc. Suction valve coupling structure for reciprocating compressor

Also Published As

Publication number Publication date
WO2008028736A1 (en) 2008-03-13
US20100008801A1 (en) 2010-01-14
DE102006042015A1 (en) 2008-03-27
RU2009109832A (en) 2010-10-20
RU2450160C2 (en) 2012-05-10
CN101512152A (en) 2009-08-19
EP2064445A1 (en) 2009-06-03

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