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EP3394442B1 - Encapsulated refrigerant compressor - Google Patents

Encapsulated refrigerant compressor Download PDF

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Publication number
EP3394442B1
EP3394442B1 EP16819889.3A EP16819889A EP3394442B1 EP 3394442 B1 EP3394442 B1 EP 3394442B1 EP 16819889 A EP16819889 A EP 16819889A EP 3394442 B1 EP3394442 B1 EP 3394442B1
Authority
EP
European Patent Office
Prior art keywords
segment
housing
suction
section
refrigerant compressor
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.)
Active
Application number
EP16819889.3A
Other languages
German (de)
French (fr)
Other versions
EP3394442A1 (en
Inventor
Sven-Eric Nielsen
Rolf Steinbrunn
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Secop GmbH
Original Assignee
Secop GmbH
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Filing date
Publication date
Application filed by Secop GmbH filed Critical Secop GmbH
Publication of EP3394442A1 publication Critical patent/EP3394442A1/en
Application granted granted Critical
Publication of EP3394442B1 publication Critical patent/EP3394442B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • 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
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/123—Fluid connections
    • 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
    • F04B39/0027—Pulsation and noise damping means
    • F04B39/0055—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes
    • F04B39/0061—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes using muffler volumes
    • 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
    • F04B39/0027—Pulsation and noise damping means
    • F04B39/0055—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes
    • F04B39/0072—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes characterised by assembly or mounting
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/10—Stators
    • F05B2240/14—Casings, housings, nacelles, gondels or the like, protecting or supporting assemblies there within
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/60—Fluid transfer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/96—Preventing, counteracting or reducing vibration or noise

Definitions

  • Refrigerant compressors such as those made from WO 2006/067218 A1 , US 2005/135941 A1 , DE 102 44 564 A1 or DE 36 43 567 A1 are known, include both components that are fixedly connected to the compressor housing (ie suction port, pressure port, and vacuum port), as well as components that are resiliently mounted on the inner wall / bottom of the housing and move by the piston movement in the operating state of the compressor / Vibration is offset (e.g. drive unit, cylinder block, suction silencer).
  • An encapsulated refrigerant compressor with the features of the preamble of claim 1 is from WO 2006/067218 A1 known.
  • US 2005/135941 A1 discloses a method in which a mandrel is driven into the end portion of a pipe, namely an outlet nozzle, to produce an expansion of the end portion and thereby to fix the outlet nozzle directly to a pressure silencer.
  • a fundamental problem in the planning and development of such compressors is therefore the creation of a flow connection between components which, due to the movement / vibration described above, perform a relative movement to one another, in particular between the end region of a suction nozzle penetrating the housing and the suction silencer.
  • connecting elements which connect the end section of the suction nozzle protruding into the housing interior to the suction muffler of the compressor, in order to allow refrigerant circulating in the cooling circuit to flow out of the suction nozzle via the connecting element into the suction muffler.
  • Flexible connecting elements which can be made of elastomer, for example, have proven to be particularly useful for this purpose. By means of such flexible connecting elements, it is possible to produce a flow connection between the end section of the suction nozzle and the suction muffler, which is not necessarily completely tight, even when these two components are relatively moved relative to one another.
  • Another object of the present invention is to fix the connecting element in its position in a particularly simple and inexpensive manner.
  • the flexible connecting element is thus connected to the end section and / or the inner wall of the housing in a particularly simple and inexpensive manner.
  • connection is to be understood in such a way that although the connecting element does not slide down from the end section, movements of the flexible connecting element, in particular the first connecting section, along the end section are fundamentally possible.
  • the end section of the suction nozzle penetrating the housing or the inner wall of the housing itself serves as a connecting means for the flexible connecting element.
  • This end section can either be provided with a special shape that takes this function into account, even before the suction connector is installed on the housing.
  • a suction nozzle that has not yet been deformed in this way can initially be easily installed, and only subsequently after the flexible connecting element has been slipped onto the end section are deformed accordingly to connect the flexible connecting element to the suction nozzle.
  • the latter variant is particularly useful in the case of a one-piece design of the suction nozzle with its end section, since the suction nozzle can be inserted into an opening of the housing from any side and then connected, preferably welded, to the housing.
  • the end section can then be deformed in a simple manner after the flexible connecting element - the flexibility of which is initially related to mutually variable positions of two end regions of the flexible connecting element opposite one another in the axial direction of the flexible connecting element - has been pushed onto the end section.
  • the suction nozzle and the end section are not made in one piece, it may be advantageous to first fasten the end section to the housing and only then to attach the section of the suction nozzle running outside the housing via the opening of the housing with the end section or to connect to the housing.
  • end sections of any shape can be conveniently attached to the housing without the size and shape of the opening of the housing having a limiting effect.
  • the flexible connecting element can be connected to the deformed end section in that the flexible connecting element is slipped over the deformation onto the end section with an also flexibly designed end region, whose flexibility can be varied in its scope.
  • the nature of the flexible connecting element only has to ensure the possibility of refrigerant overflowing, but an absolutely tight flow connection does not have to be provided. In some cases it may even be desirable for the flexible connecting element to have means, for example valves, for pressure compensation with the interior of the housing.
  • the end portion of the suction nozzle that the end portion to one Make connection of the flexible connecting element to the end section and / or an inner wall of the housing suitable means.
  • a particularly simple form of this type consists, for example, in an expansion of a tube forming the end section in the direction of the suction muffler.
  • the end section is tubular and has an extension section, the outer lateral surface of which widens, preferably continuously, in a direction pointing toward the suction muffler.
  • Such an extension section prevents the flexible connecting element from sliding down from the end section.
  • the end section does not necessarily have to have a circular profile.
  • the simple shape of the end section corresponding to this embodiment can be achieved with end sections of any profile in that the circumference of the cross-sectional area of the end section increases with increasing distance from the inner wall of the housing.
  • a widening of the end section extending continuously from the inner wall of the housing can be provided.
  • the extension section connects directly to the inner wall.
  • extension section of this embodiment directly adjoining the inner wall ensures a particularly firm fit of the connecting element on the end section of the suction nozzle.
  • extension section does not directly adjoin the inner wall, but rather only begins at a distance from the inner wall.
  • a further preferred embodiment of the refrigerant compressor according to the invention therefore provides that a spacing section runs between the inner wall and the extension section.
  • the extension section has the outlet opening.
  • the preferably continuous expansion of the outer lateral surface of the expansion section is produced in a particularly simple manner by means of bending or flanging.
  • Such a widening can thus either be produced prior to the assembly of the end section on the housing by means of known manual or mechanical methods, or it can be created subsequently, for example, by means of a mandrel driven into the outlet opening of the end section already mounted on the housing.
  • the flexible connecting element has a first connection section, which is arranged between the end of the extension section facing the suction muffler and the inner wall, enclosing the end section.
  • the first connection section rests with one end against the inner wall and with its other end rests against the preferably continuously expanding extension section.
  • an additional holding element is provided in a further preferred embodiment of the refrigerant compressor according to the invention, which holds the extension section and / or the Surrounding section surrounds.
  • the stability of the flexible connecting element connected to the inner wall of the housing by means of the clamped first connecting section is increased by the interposition of a holding element according to the invention, for example in the form of a circular ring, since the clamping effect exerted by the first extension section on the flexible connecting element is uniform over an entire holding element subsequent section of the first connection section is transmitted, provided that the first connection section is clamped between the holding element and the inner wall.
  • the first connection section is clamped between the inner wall and the holding element.
  • the additional holding element is made of plastic or steel.
  • the flexible connecting element is designed as a bellows.
  • the production costs of the compressor according to the invention are further reduced.
  • the flexibility of the bellows makes it possible to maintain the flow connection even with strong relative movements between the suction silencer and the end section of the suction nozzle.
  • the bellows is preferably designed in such a way that even in the event of maximum compression of the bellows, it still has an axial extension which corresponds to the Contact between suction silencer and end section prevented.
  • the flexible connecting element has a second connection section which is fastened to the suction muffler in the area of the suction opening.
  • the first connecting section is pushed forward in the direction of the housing Method step which may be necessary if the end section has a spacing section.
  • Fig. 1 shows a refrigerant compressor according to the invention in an external view, the refrigerant compressor having an upper section having a suction port 6, specifically a cover, of a housing 1.
  • said housing section also has a pressure line, not provided with reference numerals, by means of which compressed refrigerant can be transported in the direction of a condenser arranged in the cooling circuit.
  • a vacuum nozzle can be seen, which is used to generate a vacuum within the compressor or the entire cooling circuit, but its operation is not discussed in more detail here.
  • Fig. 2 shows a refrigerant compressor according to the invention, wherein the housing section having the suction nozzle 6 is not shown.
  • Fig. 3 shows a detailed view of a flexible connecting element 10, which is connected to the end section 7 of a suction nozzle 6 according to the invention and is designed as a bellows in the specific embodiment.
  • An end section 7 of the suction nozzle 6 protrudes from the outside into an inner region of the housing 1.
  • the end section 7 is defined as that section of the suction nozzle 6 which lies in the inner region.
  • the end section 7 has an expansion section 13, the outer lateral surface 18 of which widens continuously in a direction axially away from the suction port 6.
  • the end section 7 also consists of a spacer section 16, which runs between an inner wall 11 of the housing 1 and the extension section 13.
  • the flexible connecting element 10 is connected to the end section 7 in such a way that with a first connecting section 12, at least in sections, both the Spacer section 16 and the extension section 13 on the common outer surface 18 encloses.
  • a first end 20 of the first connection section 12 directly adjoins the inner wall 11 of the housing 1, while a second end 21 of the first connection section 12 directly adjoins the outer lateral surface 18 of the extension section 13.
  • the end section 7, in particular the extension section 13, itself serves as a means for connecting the flexible connecting element 10 to the end section 7 and to the housing 1. Due to the shape of the extension section 13, the end section 7 fixes the first connection section 12 of the flexible one Connecting element 10 in the specific embodiment against the inner wall 11. The first connection section 12 is thus clamped between the extension section 13 and the inner wall 11.
  • Fig. 3b shows in this context an embodiment variant of the refrigerant compressor according to the invention, in which the flexible connecting element 10 is connected by means of the extension section 13 to the end section 7 of the suction nozzle 6 and is thus secured against sliding down from the same, but not - as for example in FIG Fig. 3a shown - is fixed by clamping on the inner wall 11. Rather, the type of connection of the flexible connecting element 10 shown permits spacing of the first end 20 of the first connecting section 12 of the flexible connecting element 10 and the inner wall 11. The flexible connecting element 10 is thus in the axial direction of the Suction nozzle 6 slidably connected to the end portion 7. The extension section 13 of the end section 7, however, further prevents the flexible connecting element 10 from slipping down from the end section 7. Such a connection can be advantageous, particularly in the case of design variants of the refrigerant compressor with longer distance sections 16.
  • Fig. 4 and the detailed view Fig. 4a show further specific exemplary embodiments of the flexible connecting element 10, which is connected to the end section 7 and the housing 1 with the interposition of a holding element 14, which in the specific exemplary embodiment is designed as a circular ring.
  • the not necessarily tight connection of the flexible connecting element 10 with its second connecting section 15 to the suction silencer 8 can also be seen.
  • Refrigerant which the intake port 6 towards cylinder 2 (see also Fig. 2 and 4th ) flows through the outlet opening 17 of the end section 7, initially into the connecting element 10 and subsequently from the connecting element 10 via a suction opening 9 of the suction muffler 8 into the suction muffler 8.
  • the holding element 14 can be provided in order to nevertheless connect flexible connecting elements, which would slide off the end section 7 due to an excessively large diameter of the opening of the first connecting section 12, to the end section and / or to the inner wall can.
  • the holding element 14 has an inner radius, which is based on the outer tube diameter of the end section 7, in particular the spacer section 16, and an outer radius which is greater than the radius of the opening of the first connecting section 12.
  • the clamping of the first connection section 12 exerted by the extension section 13 is distributed uniformly over a larger area of the first connection section 12, namely essentially over its entire first end 20, and as a result the fastening of the flexible connecting element 10 to the housing 1 is increased overall.
  • 5a and 5b illustrate the method according to the invention for connecting the flexible connecting element 10 to the end section 7 and the inner wall 11 of the housing 1.
  • the flexible connecting element 10 with its first connection section 12 is slipped over the end section 7 of the suction nozzle 6.
  • the flexible connecting element 10 In order to bring the flexible connecting element 10, in particular its first connection section 12, into a position that is favorable for the connection to the housing 1, it can optionally be provided to push the flexible connection element 10 in the direction of the housing 1 until the first end 20 of the first connection section 12 at least in sections, in the illustrated embodiment of the flexible connecting element 10 even flat, rests on the inner wall 11 of the housing 1 and thus directly connects to this housing 1. Whether such an advancement is necessary depends in particular on the length of the end section 7.
  • this mandrel 22 is inserted into the end section 7 via the outlet opening 17.
  • this mandrel 22 has a longitudinal section which has a diameter which increases in the axial direction.
  • the mandrel 22 is driven, preferably by means of a hammer, along a driving direction 23 in the direction of the housing 1, so that the longitudinal section of the mandrel 22, which has an increasing diameter, results in a continuous widening of the outer lateral surface 18 of the end section 7. Due to the expansion section 13 of the end section 7 thus created, the flexible connecting element 10 is fixedly connected to the inner wall 11 of the housing 1 by clamping the first connecting section 12.

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  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
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Description

GEBIET DER ERFINDUNGFIELD OF THE INVENTION

Gekapselter Kältemittelkompressor, umfassend

  • eine Antriebseinheit,
  • einen Zylinderblock, welcher zumindest einen Zylinder sowie einen mit der Antriebseinheit in Wirkverbindung stehenden und sich innerhalb des Zylinders hin und her bewegenden Kolben aufweist,
  • einen Zylinderdeckel, welcher über eine Ventilplatte mit dem Zylinderblock verbunden ist, wobei die Ventilplatte zumindest ein Einlassventil sowie zumindest ein Auslassventil aufweist, um ein durch die Kolbenbewegung hervorgerufenes Strömen von Kältemittel in den Zylinder über das Einlassventil bzw. aus dem Zylinder über das Auslassventil zu ermöglichen,
  • ein Gehäuse, welches zumindest die Antriebseinheit, den Zylinderblock und den Zylinderdeckel einschließt,
  • einen in das Gehäuse ragenden Endabschnitt eines Saugstutzens für das Kältemittel, mit einer Auslassöffnung, über welche Kältemittel in das Innere des Gehäuses strömen kann
  • einen Saugschalldämpfer, welcher Saugschalldämpfer zumindest eine dem Endabschnitt zuweisende Ansaugöffnung aufweist, sowie
  • ein flexibles Verbindungselement, welches eine Strömungsverbindung zwischen dem Endabschnitt und der Ansaugöffnung des Saugschalldämpfers herstellt, um ein Überströmen von Kältemittel aus dem Saugstutzen über den Endabschnitt in den zumindest einen Saugschalldämpfer zu ermöglichen,
  • wobei Mittel zur Anbindung des flexiblen Verbindungselementes an dem Endabschnitt und einer Innenwand des Gehäuses vorgesehen sind,
  • wobei die Mittel zur Anbindung des flexiblen Verbindungselementes an den Endabschnitt und der Innenwand des Gehäuses der Endabschnitt selbst ist, wobei der Endabschnitt rohrförmig ausgebildet ist und einen Erweiterungsabschnitt aufweist, dessen äußere Mantelfläche sich, vorzugsweise kontinuierlich, in einer zum Saugschalldämpfer weisenden Richtung aufweitet, und wobei das flexible Verbindungselement einen ersten Anbindungsabschnitt aufweist, welcher zwischen dem dem Saugschalldämpfer zuweisenden Ende des Erweiterungsabschnitts und der Innenwand den Endabschnitt umschließend angeordnet ist.
Enclosed refrigerant compressor, comprehensive
  • a drive unit,
  • a cylinder block which has at least one cylinder and a piston which is operatively connected to the drive unit and moves back and forth within the cylinder,
  • a cylinder cover, which is connected to the cylinder block via a valve plate, the valve plate having at least one inlet valve and at least one outlet valve, in order to enable refrigerant to flow into the cylinder via the inlet valve or out of the cylinder via the outlet valve, caused by the piston movement ,
  • a housing which includes at least the drive unit, the cylinder block and the cylinder cover,
  • an end section of a suction port for the refrigerant projecting into the housing, with an outlet opening, via which refrigerant can flow into the interior of the housing
  • a suction muffler, which suction muffler has at least one suction opening facing the end section, and
  • a flexible connecting element, which establishes a flow connection between the end section and the suction opening of the suction muffler, in order to allow refrigerant to flow from the suction nozzle over the end section into the at least one suction muffler,
  • means for connecting the flexible connecting element to the end section and an inner wall of the housing are provided,
  • wherein the means for connecting the flexible connecting element to the end section and the inner wall of the housing is the end section itself, the end section being tubular and one Has extension portion, the outer lateral surface widens, preferably continuously, in a direction facing the suction muffler, and wherein the flexible connecting element has a first connecting portion, which is arranged between the end of the extension portion facing the suction muffler and the inner wall surrounding the end portion.

STAND DER TECHNIKSTATE OF THE ART

Kältemittelkompressoren, wie sie beispielsweise aus WO 2006/067218 A1 , US 2005/135941 A1 , DE 102 44 564 A1 oder DE 36 43 567 A1 bekannt sind, umfassen sowohl Bauteile, die fest mit dem Kompressorgehäuse verbunden sind (i.e. Saugstutzen, Druckstutzen, und Vakuumierstutzen), als auch Bauteile, die federnd an der Innenwand/dem Boden des Gehäuses gelagert sind und durch die Kolbenbewegung im Betriebszustand des Kompressors in Bewegung/Schwingung versetzt werden (beispielsweise Antriebseinheit, Zylinderblock, Saugschalldämpfer).Refrigerant compressors, such as those made from WO 2006/067218 A1 , US 2005/135941 A1 , DE 102 44 564 A1 or DE 36 43 567 A1 are known, include both components that are fixedly connected to the compressor housing (ie suction port, pressure port, and vacuum port), as well as components that are resiliently mounted on the inner wall / bottom of the housing and move by the piston movement in the operating state of the compressor / Vibration is offset (e.g. drive unit, cylinder block, suction silencer).

Ein gekapselter Kältemittelkompressor mit den Merkmalen des Oberbegriffs von Anspruch 1 ist aus WO 2006/067218 A1 bekannt.An encapsulated refrigerant compressor with the features of the preamble of claim 1 is from WO 2006/067218 A1 known.

US 2005/135941 A1 offenbart ein Verfahren, bei dem ein Dorn in den Endabschnitt eines Rohres, nämlich eines Auslassstutzens, getrieben wird, um eine Aufweitung des Endabschnittes herzustellen und den Auslassstutzen dadurch direkt an einem Druckschalldämpfer zu befestigen. US 2005/135941 A1 discloses a method in which a mandrel is driven into the end portion of a pipe, namely an outlet nozzle, to produce an expansion of the end portion and thereby to fix the outlet nozzle directly to a pressure silencer.

Ein grundsätzliches Problem bei der Planung und Entwicklung solcher Kompressoren besteht daher in der Herstellung einer Strömungsverbindung zwischen Bauteilen, welche aufgrund der oben beschriebenen Bewegung/Schwingung eine Relativbewegung zueinander ausführen, insbesondere zwischen dem Endbereich eines das Gehäuse durchdringenden Saugstutzens und dem Saugschalldämpfer.A fundamental problem in the planning and development of such compressors is therefore the creation of a flow connection between components which, due to the movement / vibration described above, perform a relative movement to one another, in particular between the end region of a suction nozzle penetrating the housing and the suction silencer.

Bekannt sind in diesem Zusammenhang Verbindungselemente, welche den in das Gehäuseinnere ragenden Endabschnitt des Saugstutzens mit dem Saugschalldämpfer des Kompressors verbinden, um ein Überströmen von im Kühlkreislauf zirkulierendem Kältemittel aus dem Saugstutzen über das Verbindungselement in den Saugschalldämpfer zu ermöglichen.In this context, connecting elements are known which connect the end section of the suction nozzle protruding into the housing interior to the suction muffler of the compressor, in order to allow refrigerant circulating in the cooling circuit to flow out of the suction nozzle via the connecting element into the suction muffler.

Diese Strömungsverbindung kann grundsätzlich zwar völlig dicht ausgeführt sein, allerdings ist es aber auch bereits von großem Vorteil wenn ein großer Anteil des über den Saugstutzen ins Innere des Gehäuses eintretenden Kältemittels direkt in den Saugschalldämpfer geleitet wird und in weiterer Folge in den Zylinder gesaugt wird und sich nicht zuerst im Inneren des Gehäuses verteilt und durch Kontakt mit Bauteilen hoher Betriebstemperatur erwärmt wird, bevor es in den Zylinder gesaugt wird.This flow connection can in principle be made completely tight, but it is also of great advantage if a large proportion of the refrigerant entering the interior of the housing via the suction nozzle is conducted directly into the suction muffler and subsequently into the Cylinder is sucked and is not first distributed inside the housing and heated by contact with components at high operating temperature before it is sucked into the cylinder.

Als besonders nützlich haben sich für diesen Zweck flexible Verbindungselemente erwiesen, welche beispielsweise aus Elastomer hergestellt sein können. Mittels solcher flexibler Verbindungselemente ist es möglich, eine nicht notwendiger Weise vollkommen dichte Strömungsverbindung zwischen dem Endabschnitt des Saugstutzens und dem Saugschalldämpfer auch bei starker Relativbewegung dieser beiden Bauteile zueinander, herzustellen.Flexible connecting elements, which can be made of elastomer, for example, have proven to be particularly useful for this purpose. By means of such flexible connecting elements, it is possible to produce a flow connection between the end section of the suction nozzle and the suction muffler, which is not necessarily completely tight, even when these two components are relatively moved relative to one another.

Bei Kompressoren nach dem Stand der Technik sind zur Befestigung dieser flexiblen Verbindungselemente am Endabschnitt des Saugstutzens jedoch stets separate Befestigungsmittel nötig, die das Verbindungselement am Endbereich befestigen. Solche separaten Befestigungsmittel haben den Nachteil, dass es mit der Zeit, beispielsweise auf Grund von Ermüdungserscheinungen des Materials der Befestigungsmittel oder aufgrund der im Betrieb auftretenden Schwingungen, zu einem Abrutschen des Verbindungselementes von dem Endabschnitt und/oder dem Saugschalldämpfer kommen kann und damit auch zu einem Lösen des flexiblen Verbindungselementes vom Saugstutzen.In the case of compressors according to the prior art, separate fastening means which fasten the connecting element to the end region are always necessary for fastening these flexible connecting elements to the end section of the suction nozzle. Such separate fasteners have the disadvantage that over time, for example due to signs of fatigue in the material of the fasteners or due to the vibrations occurring during operation, the connecting element can slip off the end section and / or the suction muffler, and thus also Loosen the flexible connecting element from the suction nozzle.

AUFGABE DER ERFINDUNGOBJECT OF THE INVENTION

In Anbetracht der oben genannten Nachteile ist es eine Aufgabe der Erfindung, die Gefahr eines Herunterrutschens des Verbindungselementes von dem Saugstutzen durch die Art der Anbindung des Verbindungselementes zu minimieren bzw. gänzlich zu vermeiden.In view of the above-mentioned disadvantages, it is an object of the invention to minimize or completely avoid the risk of the connecting element slipping off the suction nozzle by the type of connection of the connecting element.

Eine weitere Aufgabe der vorliegenden Erfindung ist es, das Verbindungselement auf besonders einfache und kostengünstige Weise in seiner Position zu fixieren.Another object of the present invention is to fix the connecting element in its position in a particularly simple and inexpensive manner.

Außerdem ist es eine Aufgabe der vorliegenden Erfindung, ein Montageverfahren eines erfindungsgemäßen Verbindungselementes bereitzustellen, welches besonders einfach und voll automatisiert ausführbar ist.It is also an object of the present invention to provide an assembly method for a connecting element according to the invention which can be carried out in a particularly simple and fully automated manner.

DARSTELLUNG DER ERFINDUNGPRESENTATION OF THE INVENTION

Bei einem erfindungsgemäßen, gekapselten Kältemittelkompressor, umfassend

  • eine Antriebseinheit,
  • einen Zylinderblock, welcher zumindest einen Zylinder sowie einen mit der Antriebseinheit in Wirkverbindung stehenden und sich innerhalb des Zylinders hin und her bewegenden Kolben aufweist,
  • einen Zylinderdeckel, welcher über eine Ventilplatte mit dem Zylinderblock verbunden ist, wobei die Ventilplatte zumindest ein Einlassventil sowie zumindest ein Auslassventil aufweist, um ein durch die Kolbenbewegung hervorgerufenes Strömen von Kältemittel in den Zylinder über das Einlassventil bzw. aus dem Zylinder über das Auslassventil zu ermöglichen,
  • ein Gehäuse, welches zumindest die Antriebseinheit, den Zylinderblock und den Zylinderdeckel einschließt,
  • einen in das Gehäuse ragenden Endabschnitt eines Saugstutzens für das Kältemittel, mit einer Auslassöffnung, über welche Kältemittel in das Innere des Gehäuses strömen kann,
  • einen Saugschalldämpfer, welcher Saugschalldämpfer zumindest eine dem Endabschnitt zuweisende Ansaugöffnung aufweist, sowie
  • ein flexibles Verbindungselement, welches eine Strömungsverbindung zwischen dem Endabschnitt und der Ansaugöffnung des Saugschalldämpfers herstellt, um ein Überströmen von Kältemittel aus dem Saugstutzen über den Endabschnitt in den zumindest einen Saugschalldämpfer zu ermöglichen,
wobei Mittel zur Anbindung des flexiblen Verbindungselementes an dem Endabschnitt und einer Innenwand des Gehäuses vorgesehen sind, wobei die Mittel zur Anbindung des flexiblen Verbindungselementes an den Endabschnitt und der Innenwand des Gehäuses der Endabschnitt selbst ist, wobei der Endabschnitt rohrförmig ausgebildet ist und einen Erweiterungsabschnitt aufweist, dessen äußere Mantelfläche sich, vorzugsweise kontinuierlich, in einer zum Saugschalldämpfer weisenden Richtung aufweitet, und wobei das flexible Verbindungselement einen ersten Anbindungsabschnitt aufweist, welcher zwischen dem dem Saugschalldämpfer zuweisenden Ende des Erweiterungsabschnitts und der Innenwand den Endabschnitt umschließend angeordnet ist, wird eine der Erfindung zugrunde liegende Aufgabe dadurch gelöst, dass der erste Anbindungsabschnitt mit seinem einen Ende an der Innenwand anliegt und mit seinem anderen Ende am sich vorzugsweise kontinuierlich erweiternden Erweiterungsabschnitt anliegt.In an encapsulated refrigerant compressor according to the invention, comprising
  • a drive unit,
  • a cylinder block which has at least one cylinder and a piston which is operatively connected to the drive unit and moves back and forth within the cylinder,
  • a cylinder cover, which is connected to the cylinder block via a valve plate, the valve plate having at least one inlet valve and at least one outlet valve, in order to enable refrigerant to flow into the cylinder via the inlet valve or out of the cylinder via the outlet valve, caused by the piston movement ,
  • a housing which includes at least the drive unit, the cylinder block and the cylinder cover,
  • an end section of a suction port for the refrigerant projecting into the housing, with an outlet opening, through which refrigerant can flow into the interior of the housing,
  • a suction muffler, which suction muffler has at least one suction opening facing the end section, and
  • a flexible connecting element, which establishes a flow connection between the end section and the suction opening of the suction muffler, in order to allow refrigerant to flow from the suction nozzle over the end section into the at least one suction muffler,
wherein means for connecting the flexible connecting element to the end section and an inner wall of the housing are provided, the means for connecting the flexible connecting element to the end section and the inner wall of the housing End section itself, wherein the end section is tubular and has an extension section, the outer lateral surface of which, preferably continuously, widens in a direction facing the suction muffler, and wherein the flexible connecting element has a first connection section which is between the end of the extension section facing the suction muffler and the inner wall is arranged surrounding the end section, one object of the invention is achieved in that the first connection section rests with one end against the inner wall and with its other end rests against the preferably continuously expanding extension section.

Somit erfolgt die Anbindung des flexiblen Verbindungselementes an dem Endabschnitt und/oder der Innenwand des Gehäuses auf besonders einfache und kostengünstige Weise.The flexible connecting element is thus connected to the end section and / or the inner wall of the housing in a particularly simple and inexpensive manner.

Der Begriff "Anbindung" soll in diesem Zusammenhang derart verstanden werden, dass zwar ein Herunterrutschen des Verbindungselementes von dem Endabschnitt unterbunden ist, Bewegungen des flexiblen Verbindungselementes, insbesondere des ersten Anbindungsabschnittes, entlang des Endabschnittes jedoch grundsätzlich möglich sind.In this context, the term “connection” is to be understood in such a way that although the connecting element does not slide down from the end section, movements of the flexible connecting element, in particular the first connecting section, along the end section are fundamentally possible.

Separate für die Anbindung vorgesehene Befestigungsmittel sind erfindungsgemäß nicht erforderlich, was einerseits zu einer Kostenreduktion und andererseits zu einer erheblichen Vereinfachung des Fertigungsprozesses des Kompressors beiträgt.Separate fasteners provided for the connection are not required according to the invention, which on the one hand contributes to a cost reduction and on the other hand to a considerable simplification of the manufacturing process of the compressor.

Vielmehr dient der Endabschnitt des das Gehäuse bzw. die Innenwand des Gehäuses durchdringenden Saugstutzens selbst als Anbindungsmittel für das flexible Verbindungselement. Dabei kann dieser Endabschnitt entweder bereits vor der Montage des Saugstutzens am Gehäuse mit einer speziellen, dieser Funktion Rechnung tragenden Form versehen sein. Andererseits kann ein noch keine solche Verformung aufweisender Saugstutzen zunächst unkompliziert montiert werden, und erst in weiterer Folge nach Überstülpen des flexiblen Verbindungselementes auf den Endabschnitt zur Anbindung des flexiblen Verbindungselementes an dem Saugstutzen entsprechend verformt werden.Rather, the end section of the suction nozzle penetrating the housing or the inner wall of the housing itself serves as a connecting means for the flexible connecting element. This end section can either be provided with a special shape that takes this function into account, even before the suction connector is installed on the housing. On the other hand, a suction nozzle that has not yet been deformed in this way can initially be easily installed, and only subsequently after the flexible connecting element has been slipped onto the end section are deformed accordingly to connect the flexible connecting element to the suction nozzle.

Die letztgenannte Variante bietet sich insbesondere im Falle einer einstückigen Ausbildung des Saugstutzens mit dessen Endabschnitt an, da der Saugstutzen von einer beliebigen Seite in eine Öffnung des Gehäuses eingeführt und anschließend mit dem Gehäuse verbunden, vorzugsweise verschweißt, werden kann. Die Verformung des Endabschnittes kann im Anschluss daran auf einfache Weise erfolgen, nachdem das flexible Verbindungselement - dessen Flexibilität hierbei zunächst auf zueinander variierbare Positionen zweier einander in axialer Richtung des flexiblen Verbindungselementes gegenüberliegender Endbereiche des flexiblen Verbindungselementes bezogen ist - auf den Endabschnitt aufgeschoben worden ist.The latter variant is particularly useful in the case of a one-piece design of the suction nozzle with its end section, since the suction nozzle can be inserted into an opening of the housing from any side and then connected, preferably welded, to the housing. The end section can then be deformed in a simple manner after the flexible connecting element - the flexibility of which is initially related to mutually variable positions of two end regions of the flexible connecting element opposite one another in the axial direction of the flexible connecting element - has been pushed onto the end section.

Bei Varianten, bei denen der Saugstutzen und der Endabschnitt nicht einstückig ausgeführt sind, kann es günstig sein, zuerst den Endabschnitt an dem Gehäuse zu befestigen und erst in weiterer Folge den außerhalb des Gehäuses verlaufenden Abschnitt des Saugstutzens über die Öffnung des Gehäuses mit dem Endabschnitt bzw. mit dem Gehäuse zu verbinden. Auf diese Weise können beliebig geformte Endabschnitte bequem am Gehäuse befestigt werden, ohne dass Größe und Form der Öffnung des Gehäuses dabei limitierend wirken. Die Anbindung des flexiblen Verbindungselementes an dem verformten Endabschnitt kann in solchen Fällen dadurch geschehen, dass das flexible Verbindungselement mit einem ebenfalls flexibel ausgebildeten Endbereich, welcher ob seiner Flexibilität in seinem Umfang variierbar ist, über die Verformung hinweg auf den Endabschnitt übergestülpt wird.In variants in which the suction nozzle and the end section are not made in one piece, it may be advantageous to first fasten the end section to the housing and only then to attach the section of the suction nozzle running outside the housing via the opening of the housing with the end section or to connect to the housing. In this way, end sections of any shape can be conveniently attached to the housing without the size and shape of the opening of the housing having a limiting effect. In such cases, the flexible connecting element can be connected to the deformed end section in that the flexible connecting element is slipped over the deformation onto the end section with an also flexibly designed end region, whose flexibility can be varied in its scope.

Die Beschaffenheit des flexiblen Verbindungselementes muss dabei lediglich die Möglichkeit des Überströmens von Kältemittel gewährleisten, eine absolut dichte Strömungsverbindung muss allerdings nicht gegeben sein. Fallweise kann es sogar gewünscht sein, dass das flexible Verbindungselement Mittel, beispielsweise Ventile, zum Druckausgleich mit dem Gehäuseinneren aufweist.The nature of the flexible connecting element only has to ensure the possibility of refrigerant overflowing, but an absolutely tight flow connection does not have to be provided. In some cases it may even be desirable for the flexible connecting element to have means, for example valves, for pressure compensation with the interior of the housing.

Grundsätzlich existiert eine Vielzahl an möglichen Formen des Endabschnittes des Saugstutzens, die den Endabschnitt zu einem zur Anbindung des flexiblen Verbindungselementes an den Endabschnitt und/oder einer Innenwand des Gehäuses geeigneten Mittel machen. Eine besonders einfache solche Form besteht beispielsweise in einer in Richtung des Saugschalldämpfers verlaufenden Aufweitung eines den Endabschnitt ausbildenden Rohres.Basically, there are a variety of possible shapes of the end portion of the suction nozzle that the end portion to one Make connection of the flexible connecting element to the end section and / or an inner wall of the housing suitable means. A particularly simple form of this type consists, for example, in an expansion of a tube forming the end section in the direction of the suction muffler.

Daher ist es erfindungsgemäß vorgesehen, dass der Endabschnitt rohrförmig ausgebildet ist und einen Erweiterungsabschnitt aufweist, dessen äußere Mantelfläche sich, vorzugsweise kontinuierlich, in einer zum Saugschalldämpfer weisenden Richtung aufweitet.It is therefore provided according to the invention that the end section is tubular and has an extension section, the outer lateral surface of which widens, preferably continuously, in a direction pointing toward the suction muffler.

Mittels eines solchen Erweiterungsabschnittes wird ein Herunterrutschen des flexiblen Verbindungselementes von dem Endabschnitt unterbunden.Such an extension section prevents the flexible connecting element from sliding down from the end section.

Der Endabschnitt muss dabei jedoch nicht zwingend ein kreisförmiges Profil aufweisen. Die dieser Ausführungsform entsprechende einfache Form des Endabschnittes kann bei Endabschnitten beliebigen Profils dadurch erreicht werden, dass der Umfang der Querschnittsfläche des Endabschnittes mit zunehmender Distanz zur Gehäuseinnenwand zunimmt.However, the end section does not necessarily have to have a circular profile. The simple shape of the end section corresponding to this embodiment can be achieved with end sections of any profile in that the circumference of the cross-sectional area of the end section increases with increasing distance from the inner wall of the housing.

Beispielsweise kann eine sich kontinuierlich von der Gehäuseinnenwand erstreckende Aufweitung des Endabschnittes vorgesehen sein.For example, a widening of the end section extending continuously from the inner wall of the housing can be provided.

Bei einer weiteren bevorzugten Ausführungsform des erfindungsgemäßen Kältemittelkompressors vorgesehen, dass der Erweiterungsabschnitt direkt an die Innenwand anschließt.In a further preferred embodiment of the refrigerant compressor according to the invention it is provided that the extension section connects directly to the inner wall.

Durch den direkt an die Innenwand anschließenden Erweiterungsabschnitt dieser Ausführungsform wird ein besonders fester Sitz des Verbindungselementes auf dem Endabschnitt des Saugstutzens gewährleistet.The extension section of this embodiment directly adjoining the inner wall ensures a particularly firm fit of the connecting element on the end section of the suction nozzle.

Um verschiedenen Bauformen des flexiblen Verbindungselementes Rechnung zu tragen, kann es jedoch vorteilhaft sein, dass der Erweiterungsabschnitt nicht direkt an die Innenwand anschließt, sondern erst in einigem Abstand zur Innenwand beginnt.In order to take into account different designs of the flexible connecting element, however, it can be advantageous that the extension section does not directly adjoin the inner wall, but rather only begins at a distance from the inner wall.

Eine weitere bevorzugte Ausführungsform des erfindungsgemäßen Kältemittelkompressors sieht daher vor, dass zwischen Innenwand und Erweiterungsabschnitt ein Distanzabschnitt verläuft.A further preferred embodiment of the refrigerant compressor according to the invention therefore provides that a spacing section runs between the inner wall and the extension section.

Um ein besonders einfaches und widerstandsfreies Überströmen des Kältemittels aus dem Endabschnitt des Saugstutzens in das flexible Verbindungselement zu ermöglichen, ist es bei einer weiteren bevorzugten Ausführungsform des erfindungsgemäßen Kältemittelkompressors vorgesehen, dass der Erweiterungsabschnitt die Auslassöffnung aufweist.In order to allow a particularly simple and resistance-free overflow of the refrigerant from the end section of the suction nozzle into the flexible connecting element, it is provided in a further preferred embodiment of the refrigerant compressor according to the invention that the extension section has the outlet opening.

Auf besonders einfache Weise ist bei einer weiteren bevorzugten Ausführungsform des erfindungsgemäßen Kältemittelkompressors die vorzugsweise kontinuierliche Aufweitung der äußeren Mantelfläche des Erweiterungsabschnitts mittels Aufbiegung bzw. Bördelung hergestellt.In a further preferred embodiment of the refrigerant compressor according to the invention, the preferably continuous expansion of the outer lateral surface of the expansion section is produced in a particularly simple manner by means of bending or flanging.

Eine solche Aufweitung kann somit entweder bereits vor der Montage des Endabschnittes an dem Gehäuse mittels bekannter manueller bzw. maschineller Verfahren hergestellt werden, oder aber beispielsweise mittels eines in die Auslassöffnung des bereits am Gehäuse montierten Endabschnitts getriebenen Dorns nachträglich geschaffen werden.Such a widening can thus either be produced prior to the assembly of the end section on the housing by means of known manual or mechanical methods, or it can be created subsequently, for example, by means of a mandrel driven into the outlet opening of the end section already mounted on the housing.

Erfindungsgemäß ist es vorgesehen, dass das flexible Verbindungselement einen ersten Anbindungsabschnitt aufweist, welcher zwischen dem dem Saugschalldämpfer zuweisenden Ende des Erweiterungsabschnitts und der Innenwand den Endabschnitt umschließend angeordnet ist.According to the invention, it is provided that the flexible connecting element has a first connection section, which is arranged between the end of the extension section facing the suction muffler and the inner wall, enclosing the end section.

Somit ist ein Herunterrutschen des flexiblen Verbindungselementes von dem Endabschnitt des Saugstutzens nicht möglich, da der erste Anbindungsabschnitt des flexiblen Verbindungselementes ohne weiteres Zutun den Erweiterungsabschnitt des Endabschnittes nicht überwinden kann.It is therefore not possible for the flexible connecting element to slide down from the end section of the suction nozzle, since the first connecting section of the flexible connecting element cannot overcome the extension section of the end section without further action.

Um mögliche Bewegungen des zwischen Erweiterungsabschnitt und Innenwand angeordneten ersten Anbindungsabschnittes entlang des Distanzabschnittes in axialer Richtung des Distanzabschnittes möglichst gering zu halten, ist es erfindungsgemäß vorgesehen, dass der erste Anbindungsabschnitt mit seinem einen Ende an der Innenwand anliegt und mit seinem anderen Ende am sich vorzugsweise kontinuierlich erweiternden Erweiterungsabschnitt anliegt.For possible movements of the first connecting section arranged between the extension section and the inner wall along the spacing section in the axial direction of the spacing section To keep it as small as possible, it is provided according to the invention that the first connection section rests with one end against the inner wall and with its other end rests against the preferably continuously expanding extension section.

Bei einer weiteren Ausführungsform des erfindungsgemäßen Kältemittelkompressors ist es vorgesehen, dass der erste Anbindungsabschnitt von Innenwand und Erweiterungsabschnitt geklemmt ist.In a further embodiment of the refrigerant compressor according to the invention, it is provided that the first connection section of the inner wall and extension section is clamped.

Dabei handelt es sich um eine besonders bevorzugte Ausführungsform des erfindungsgemäßen Kältemittelkompressors, da das flexible Verbindungselement mittels seines zwischen Innenwand und Erweiterungsabschnitt geklemmten ersten Anbindungsabschnittes an der Innenwand des Gehäuses fixiert ist, was zu einer deutlich erhöhten Stabilität der Anbindung des flexiblen Verbindungselementes führt.This is a particularly preferred embodiment of the refrigerant compressor according to the invention, since the flexible connecting element is fixed to the inner wall of the housing by means of its first connecting section clamped between the inner wall and the extension section, which leads to a significantly increased stability of the connection of the flexible connecting element.

Um die Stabilität der Anbindung noch weiter zu erhöhen und um ein flexibles Verbindungselement in Verbindung mit Endabschnitten mit unterschiedlichen Durchmessern und/oder Formen verwenden zu können, ist bei einer weiteren bevorzugten Ausführungsform des erfindungsgemäßen Kältemittelkompressors ein zusätzliches Haltelement vorgesehen, welches den Erweiterungsabschnitt und/oder den Distanzabschnitt umgibt.In order to further increase the stability of the connection and to be able to use a flexible connecting element in connection with end sections with different diameters and / or shapes, an additional holding element is provided in a further preferred embodiment of the refrigerant compressor according to the invention, which holds the extension section and / or the Surrounding section surrounds.

Durch Zwischenlage eines solchen Halteelementes zwischen ersten Anbindungsabschnitt und Erweiterungsabschnitt ist es möglich, eine bestimmte Bauform des flexiblen Verbindungselementes für verschiedene Endabschnitte - beispielsweise in verschiedenen Kompressor-Serien - zu verwenden. Selbst in Fällen, in denen eine Öffnung im ersten Anbindungsabschnitt, entlang welcher der erste Anbindungsabschnitt den Endabschnitt des Saugstutzens umschließt, einen deutlich größeren Durchmesser als der Distanzabschnitt des Endabschnittes aufweist, kann ein geeignetes Halteelement trotzdem zur Blockade des Anbindungsabschnittes durch den Erweiterungsabschnitt führen.By interposing such a holding element between the first connection section and the extension section, it is possible to use a specific design of the flexible connecting element for different end sections, for example in different compressor series. Even in cases in which an opening in the first connection section, along which the first connection section encloses the end section of the suction nozzle, has a significantly larger diameter than the spacer section of the end section, a suitable holding element can nevertheless lead to the connection section being blocked by the extension section.

Zudem erhöht sich die Stabilität des mittels des geklemmten ersten Anbindungsabschnittes an der Innenwand des Gehäuses angebundenen flexiblen Verbindungselementes durch Zwischenlage eines erfindungsgemäßen, beispielsweise als Kreisring ausgebildeten, Halteelementes, da die durch den ersten Erweiterungsabschnitt auf das flexible Verbindungselement ausgeübte Klemmwirkung gleichmäßig auf einen gesamten an das Halteelement anschließenden Abschnitt des ersten Anbindungsabschnittes übertragen wird, vorausgesetzt, der erste Anbindungsabschnitt ist zwischen dem Halteelement und der Innenwand geklemmt.In addition, the stability of the flexible connecting element connected to the inner wall of the housing by means of the clamped first connecting section is increased by the interposition of a holding element according to the invention, for example in the form of a circular ring, since the clamping effect exerted by the first extension section on the flexible connecting element is uniform over an entire holding element subsequent section of the first connection section is transmitted, provided that the first connection section is clamped between the holding element and the inner wall.

Daher ist es bei einer weiteren bevorzugten Ausführungsform des erfindungsgemäßen Kältemittelkompressors vorgesehen, dass der erste Anbindungsabschnitt zwischen Innenwand und Halteelement geklemmt ist.Therefore, in a further preferred embodiment of the refrigerant compressor according to the invention, it is provided that the first connection section is clamped between the inner wall and the holding element.

Um die Stabilität der Anbindung des flexiblen Verbindungselementes an der Innenwand des Gehäuses zu maximieren, ist es bei einer weiteren besonders bevorzugten Ausführungsform des erfindungsgemäßen Kältemittelkompressors vorgesehen, dass das zusätzliche Halteelement aus Kunststoff oder Stahl gefertigt ist.In order to maximize the stability of the connection of the flexible connecting element to the inner wall of the housing, it is provided in a further particularly preferred embodiment of the refrigerant compressor according to the invention that the additional holding element is made of plastic or steel.

Bei einer anderen bevorzugten Ausführungsform des erfindungsgemäßen Kältemittelkompressors ist es vorgesehen, dass das flexible Verbindungselement als Faltenbalg ausgebildet ist.In another preferred embodiment of the refrigerant compressor according to the invention, it is provided that the flexible connecting element is designed as a bellows.

Durch die Verwendung eines solchen Standardbauteils als flexibles Verbindungselement werden die Produktionskosten des erfindungsgemäßen Kompressors weiter reduziert. Außerdem ist durch die Flexibilität des Faltenbalgs auch noch bei starken Relativbewegungen zwischen Saugschalldämpfer und Endabschnitt Saugstutzen ein Aufrechterhalten der Strömungsverbindung möglich. Vorzugsweise ist der Faltenbalg dabei derart ausgebildet, dass er selbst im Falle maximaler Kompression des Faltenbalgs noch eine axiale Ausdehnung aufweist, die den Kontakt zwischen Saugschalldämpfer und Endabschnitt verhindert.By using such a standard component as a flexible connecting element, the production costs of the compressor according to the invention are further reduced. In addition, the flexibility of the bellows makes it possible to maintain the flow connection even with strong relative movements between the suction silencer and the end section of the suction nozzle. The bellows is preferably designed in such a way that even in the event of maximum compression of the bellows, it still has an axial extension which corresponds to the Contact between suction silencer and end section prevented.

Bei einer weiteren bevorzugten Ausführungsform des erfindungsgemäßen Kältemittelkompressors ist es vorgesehen, dass das flexible Verbindungselement einen zweiten Anbindungsabschnitt aufweist, welches im Bereich der Ansaugöffnung am Saugschalldämpfer befestigt ist.In a further preferred embodiment of the refrigerant compressor according to the invention it is provided that the flexible connecting element has a second connection section which is fastened to the suction muffler in the area of the suction opening.

Dadurch kann eine optimale Strömungsverbindung zwischen der Auslassöffnung des Endabschnittes und der Ansaugöffnung des Saugschalldämpfers hergestellt werden.This allows an optimal flow connection to be established between the outlet opening of the end section and the suction opening of the suction muffler.

Um eine besonders einfache und vollautomatisierbare Montage des flexiblen Verbindungselementes zu ermöglichen, wird erfindungsgemäß ein Verfahren zur Anbindung eines flexiblen Verbindungselementes an einen von der Wand eines Gehäuses eines gekapselten Kältemittelverdichters nach innen abstehenden, eine Auslassöffnung für das Kältemittel aufweisenden Endabschnitt eines Saugstutzens vorgeschlagen, welches die folgenden Schritte umfasst:

  • Überstülpen eines ersten Anbindungsabschnittes des flexiblen Verbindungselementes über den Endabschnitt und vorzugsweise Vorschieben des ersten Anbindungsabschnittes in Richtung Gehäuse,
  • Einführen eines in axialer Richtung einen zunehmenden Durchmesser aufweisenden Dorns in die Auslassöffnung
  • Treiben des Dorns, vorzugsweise mittels eines Hammers, in Richtung Gehäuse zur, vorzugsweise kontinuierlichen, Aufweitung der äußeren Mantelfläche des Endabschnitts
In order to enable a particularly simple and fully automated assembly of the flexible connecting element, a method for connecting a flexible connecting element to an end section of a suction nozzle having an outlet opening for the refrigerant and projecting inwards from the wall of a housing of an encapsulated refrigerant compressor is proposed, which includes the following Steps include:
  • Slipping a first connection section of the flexible connecting element over the end section and preferably advancing the first connection section towards the housing,
  • Inserting a mandrel with an increasing diameter in the axial direction into the outlet opening
  • Driving the mandrel, preferably by means of a hammer, in the direction of the housing for, preferably continuously, widening the outer lateral surface of the end section

Dabei handelt es sich bei dem Vorschieben des ersten Anbindungsabschnittes in Richtung Gehäuse um einen Verfahrensschritt, welcher nötig sein kann, wenn der Endabschnitt einen Distanzabschnitt aufweist.The first connecting section is pushed forward in the direction of the housing Method step which may be necessary if the end section has a spacing section.

KURZE BESCHREIBUNG DER FIGURENBRIEF DESCRIPTION OF THE FIGURES

Die Erfindung wird nun anhand von Ausführungsbeispielen näher erläutert. Die Zeichnungen sind beispielhaft und sollen den Erfindungsgedanken zwar darlegen, ihn aber keinesfalls einengen oder gar abschließend wiedergeben. Dabei zeigt:

Fig. 1
einen Kältemittelkompressor in einer Außenansicht
Fig. 2
den Kältemittelkompressor aus Fig. 1, wobei ein einen Ansaugstutzen aufweisender Abschnitt des Kompressorgehäuses nicht dargestellt ist
Fig. 3
ein flexibles Verbindungselement, welches erfindungsgemäß an den Endabschnitt eines Saugstutzens angebunden ist
Fig. 3a
Detail A aus Fig. 3
Fig. 3b
eine zu Fig. 3a korrespondierende Detailansicht einer Ausführungsvariante mit längerem Distanzabschnitt
Fig. 4
ein flexibles Verbindungselement, welches unter Zwischenlage eines Halteelementes an den Endabschnitt eines Saugstutzens angebunden ist
Fig. 4a
Detail B aus Fig. 4 (ohne Saugschalldämpfer)
Fig. 5a
einen ersten Verfahrensschritt zur Herstellung eines erfindungsgemäßen Endabschnitts eines Saugstutzens
Fig. 5b
einen zweiten Verfahrensschritt zur Herstellung eines erfindungsgemäßen Endabschnitts eines Saugstutzens
The invention will now be explained in more detail on the basis of exemplary embodiments. The drawings are exemplary and are intended to illustrate the idea of the invention, but in no way to narrow it down or even reproduce it conclusively. It shows:
Fig. 1
a refrigerant compressor in an external view
Fig. 2
the refrigerant compressor Fig. 1 , wherein a portion of the compressor housing having an intake port is not shown
Fig. 3
a flexible connecting element which, according to the invention, is connected to the end section of a suction nozzle
Fig. 3a
Detail A from Fig. 3
Fig. 3b
one too Fig. 3a Corresponding detailed view of a variant with a longer distance section
Fig. 4
a flexible connecting element which is connected to the end portion of a suction nozzle with the interposition of a holding element
Fig. 4a
Detail B. Fig. 4 (without suction silencer)
Fig. 5a
a first method step for producing an end section of a suction nozzle according to the invention
Fig. 5b
a second method step for producing an end section of a suction nozzle according to the invention

WEGE ZUR AUSFÜHRUNG DER ERFINDUNGWAYS OF CARRYING OUT THE INVENTION

Fig. 1 zeigt einen erfindungsgemäßen Kältemittelkompressor in einer Außenansicht, wobei der Kältemittelkompressor einen einen Saugstutzen 6 aufweisenden oberen Abschnitt, konkret einen Deckel, eines Gehäuses 1 aufweist. Zusätzlich zu dem im konkreten Ausführungsbeispiel an den Deckel angeschweißten Saugstutzen 6, über welchen Kältemittel in einen Zylinder eines Zylinderblockes 2 (siehe Fig. 2) gesaugt wird, um dort verdichtet zu werden, weist der besagte Gehäuseabschnitt noch eine, nicht mit Bezugszeichen versehene, Druckleitung auf, mittels welcher komprimiertes Kältemittel in Richtung eines im Kühlkreis angeordneten Verflüssigers transportiert werden kann. Weiters ist noch ein Vakuumierstutzen zu sehen, welcher zur Erzeugung eines Vakuums innerhalb des Kompressors bzw. des gesamten Kühlkreislaufes dient, auf dessen Funktionsweise an dieser Stelle jedoch nicht näher eingegangen wird. Fig. 1 shows a refrigerant compressor according to the invention in an external view, the refrigerant compressor having an upper section having a suction port 6, specifically a cover, of a housing 1. In addition to the suction nozzle 6 welded to the cover in the specific exemplary embodiment, via which refrigerant flows into a cylinder a cylinder block 2 (see Fig. 2 ) is sucked in order to be compressed there, said housing section also has a pressure line, not provided with reference numerals, by means of which compressed refrigerant can be transported in the direction of a condenser arranged in the cooling circuit. Furthermore, a vacuum nozzle can be seen, which is used to generate a vacuum within the compressor or the entire cooling circuit, but its operation is not discussed in more detail here.

Fig. 2 zeigt einen erfindungsgemäßen Kältemittelkompressor, wobei der den Saugstutzen 6 aufweisende Gehäuseabschnitt nicht dargestellt ist. Fig. 2 shows a refrigerant compressor according to the invention, wherein the housing section having the suction nozzle 6 is not shown.

Zu sehen sind demnach eine Antriebseinheit 5, der in Höhenrichtung an die Antriebseinheit 5 anschließende Zylinderblock 2, ein Zylinderdeckel 3, welcher mittels einer Ventilplatte 4 von dem Zylinderblock 2 getrennt ist, sowie ein Saugschalldämpfer 8.This shows a drive unit 5, the cylinder block 2 adjoining the drive unit 5 in the vertical direction, a cylinder cover 3, which is separated from the cylinder block 2 by means of a valve plate 4, and a suction silencer 8.

Fig. 3 zeigt eine Detailansicht eines flexiblen Verbindungselementes 10, welches an den Endabschnitt 7 eines Saugstutzens 6 erfindungsgemäß angebunden ist und im konkreten Ausführungsbeispiel als Faltenbalg ausgebildet ist. Fig. 3 shows a detailed view of a flexible connecting element 10, which is connected to the end section 7 of a suction nozzle 6 according to the invention and is designed as a bellows in the specific embodiment.

Ein Endabschnitt 7 des Saugstutzens 6 ragt von außen in einen inneren Bereich des Gehäuses 1. Der Endabschnitt 7 ist dabei als derjenige Abschnitt des Saugstutzens 6 definiert, welcher im inneren Bereich liegt. Der Endabschnitt 7 weist einen Erweiterungsabschnitt 13 auf, dessen äußere Mantelfläche 18 sich in eine axial von dem Saugstutzen 6 wegweisenden Richtung kontinuierlich aufweitet. Weiters besteht der Endabschnitt 7 noch aus einem Distanzabschnitt 16, welcher zwischen einer Innenwand 11 des Gehäuses 1 und dem Erweiterungsabschnitt 13 verläuft.An end section 7 of the suction nozzle 6 protrudes from the outside into an inner region of the housing 1. The end section 7 is defined as that section of the suction nozzle 6 which lies in the inner region. The end section 7 has an expansion section 13, the outer lateral surface 18 of which widens continuously in a direction axially away from the suction port 6. Furthermore, the end section 7 also consists of a spacer section 16, which runs between an inner wall 11 of the housing 1 and the extension section 13.

Das flexible Verbindungselement 10 ist derart an den Endabschnitt 7 angebunden, dass es mit einem ersten Anbindungsabschnitt 12 zumindest abschnittsweise sowohl den Distanzabschnitt 16 als auch den Erweiterungsabschnitt 13 an der gemeinsamen äußeren Mantelfläche 18 umschließt. Dabei grenzt ein erstes Ende 20 des ersten Anbindungsabschnittes 12 direkt an die Innenwand 11 des Gehäuses 1 an, während ein zweites Ende 21 des ersten Anbindungsabschnittes 12 direkt an die äußere Mantelfläche 18 des Erweiterungsabschnittes 13 angrenzt.The flexible connecting element 10 is connected to the end section 7 in such a way that with a first connecting section 12, at least in sections, both the Spacer section 16 and the extension section 13 on the common outer surface 18 encloses. Here, a first end 20 of the first connection section 12 directly adjoins the inner wall 11 of the housing 1, while a second end 21 of the first connection section 12 directly adjoins the outer lateral surface 18 of the extension section 13.

Der Endabschnitt 7, hier insbesondere der Erweiterungsabschnitt 13, dient in diesem Ausführungsbeispiel selbst als Mittel zur Anbindung des flexiblen Verbindungselementes 10 an den Endabschnitt 7 sowie an das Gehäuse 1. Bedingt durch die Form des Erweiterungsabschnittes 13 fixiert der Endabschnitt 7 den ersten Anbindungsabschnitt 12 des flexiblen Verbindungselementes 10 im konkreten Ausführungsbeispiel gegen die Innenwand 11. Der erste Anbindungsabschnitt 12 ist somit zwischen dem Erweiterungsabschnitt 13 und der Innenwand 11 eingeklemmt.In this exemplary embodiment, the end section 7, in particular the extension section 13, itself serves as a means for connecting the flexible connecting element 10 to the end section 7 and to the housing 1. Due to the shape of the extension section 13, the end section 7 fixes the first connection section 12 of the flexible one Connecting element 10 in the specific embodiment against the inner wall 11. The first connection section 12 is thus clamped between the extension section 13 and the inner wall 11.

Diese Situation wird durch die Detailansicht der Fig. 3a verdeutlicht. Durch seine spezielle Form sorgt der Erweiterungsabschnitt 13 des Endabschnittes 7 für die Fixierung des flexiblen Verbindungselementes 10 an dem Endabschnitt 7, und zwar mittels Klemmung des ersten Anbindungsabschnittes 12 zwischen dem Erweiterungsabschnitt 13 selbst und der Innenwand 11 des Gehäuses 1.This situation is illustrated by the detailed view of the Fig. 3a clarifies. Due to its special shape, the extension section 13 of the end section 7 ensures the fixing of the flexible connecting element 10 to the end section 7, namely by clamping the first connection section 12 between the extension section 13 itself and the inner wall 11 of the housing 1.

Fig. 3b zeigt in diesem Zusammenhang eine Ausführungsvariante des erfindungsgemäßen Kältemittelkompressors, bei welcher das flexible Verbindungselement 10 mittels des Erweiterungsabschnittes 13 zwar an den Endabschnitt 7 des Saugstutzens 6 angebunden und somit gegen Herunterrutschen von ebenjenem gesichert ist, jedoch nicht - wie etwa in Fig. 3a gezeigt - mittels Klemmung an der Innenwand 11 fixiert ist. Vielmehr lässt die dargestellte Art der Anbindung des flexiblen Verbindungselementes 10 eine Beabstandung des ersten Endes 20 des ersten Anbindungsabschnittes 12 des flexiblen Verbindungselementes 10 und der Innenwand 11 zu. Das flexible Verbindungselement 10 ist somit in axialer Richtung des Saugstutzens 6 verschiebbar an den Endabschnitt 7 angebunden. Der Erweiterungsabschnitt 13 des Endabschnittes 7 verhindert jedoch weiterhin ein Herunterrutschen des flexiblen Verbindungselementes 10 von dem Endabschnitt 7. Gerade bei Ausführungsvarianten des Kältemittelkompressors mit längeren Distanzabschnitten 16 kann eine solche Anbindung vorteilhaft sein. Fig. 3b shows in this context an embodiment variant of the refrigerant compressor according to the invention, in which the flexible connecting element 10 is connected by means of the extension section 13 to the end section 7 of the suction nozzle 6 and is thus secured against sliding down from the same, but not - as for example in FIG Fig. 3a shown - is fixed by clamping on the inner wall 11. Rather, the type of connection of the flexible connecting element 10 shown permits spacing of the first end 20 of the first connecting section 12 of the flexible connecting element 10 and the inner wall 11. The flexible connecting element 10 is thus in the axial direction of the Suction nozzle 6 slidably connected to the end portion 7. The extension section 13 of the end section 7, however, further prevents the flexible connecting element 10 from slipping down from the end section 7. Such a connection can be advantageous, particularly in the case of design variants of the refrigerant compressor with longer distance sections 16.

Fig. 4 und die Detailansicht Fig. 4a zeigen weitere konkrete Ausführungsbeispiele des flexiblen Verbindungselementes 10, welches unter Zwischenlage eines Halteelementes 14, welches im konkreten Ausführungsbeispiel als Kreisring ausgebildet ist, an den Endabschnitt 7 und das Gehäuse 1 angebunden ist. Dabei ist auch die nicht notwendigerweise dichte Anbindung des flexiblen Verbindungselementes 10 mit seinem zweiten Anbindungsabschnitt 15 an den Saugschalldämpfer 8 ersichtlich. Fig. 4 and the detailed view Fig. 4a show further specific exemplary embodiments of the flexible connecting element 10, which is connected to the end section 7 and the housing 1 with the interposition of a holding element 14, which in the specific exemplary embodiment is designed as a circular ring. The not necessarily tight connection of the flexible connecting element 10 with its second connecting section 15 to the suction silencer 8 can also be seen.

Kältemittel, welches den Saugstutzen 6 in Richtung Zylinder 2 (siehe auch Fig. 2 und 4) durchströmt, kann über die Auslassöffnung 17 des Endabschnittes 7 zunächst in das Verbindungselement 10 und in weiterer Folge aus dem Verbindungselement 10 über eine Ansaugöffnung 9 des Saugschalldämpfers 8 in den Saugschalldämpfer 8 überströmen.Refrigerant, which the intake port 6 towards cylinder 2 (see also Fig. 2 and 4th ) flows through the outlet opening 17 of the end section 7, initially into the connecting element 10 and subsequently from the connecting element 10 via a suction opening 9 of the suction muffler 8 into the suction muffler 8.

Das Halteelement 14 kann bei bevorzugten Ausführungsvarianten des erfindungsgemäßen flexiblen Verbindungselementes 10 vorgesehen sein, um flexible Verbindungselemente, welche auf Grund eines zu großen Durchmessers der Öffnung des ersten Anbindungsabschnittes 12 von dem Endabschnitt 7 herunterrutschen würden, trotzdem am Endabschnitt und/oder an der Innenwand anbinden zu können. In solchen Fällen weist das Halteelement 14 einen inneren Radius auf, welcher auf den äußeren Rohrdurchmesser des Endabschnittes 7, insbesondere des Distanzabschnittes 16, abgestellt ist, und einen äußeren Radius, welcher größer ist als der Radius der Öffnung des ersten Anbindungsabschnittes 12. Dadurch wird zunächst ein Herunterrutschen des Halteelementes 14 von dem Endabschnitt 7 durch den Erweiterungsabschnitt 13, und in weiterer Folge auch ein Herunterrutschen des flexiblen Verbindungselementes 10 durch das blockierte Halteelement 14 unterbunden.In preferred embodiments of the flexible connecting element 10 according to the invention, the holding element 14 can be provided in order to nevertheless connect flexible connecting elements, which would slide off the end section 7 due to an excessively large diameter of the opening of the first connecting section 12, to the end section and / or to the inner wall can. In such cases, the holding element 14 has an inner radius, which is based on the outer tube diameter of the end section 7, in particular the spacer section 16, and an outer radius which is greater than the radius of the opening of the first connecting section 12. As a result, initially a sliding down of the holding element 14 from the end section 7 through the extension section 13, and subsequently as well slipping of the flexible connecting element 10 by the blocked holding element 14 is prevented.

Andererseits wird die durch den Erweiterungsabschnitt 13 ausgeübte Klemmung des ersten Anbindungsabschnittes 12 gleichmäßig auf einen größeren Bereich des ersten Anbindungsabschnittes 12, nämlich im Wesentlichen auf sein gesamtes erstes Ende 20, verteilt und dadurch die Befestigung des flexiblen Verbindungselementes 10 an dem Gehäuse 1 insgesamt erhöht.On the other hand, the clamping of the first connection section 12 exerted by the extension section 13 is distributed uniformly over a larger area of the first connection section 12, namely essentially over its entire first end 20, and as a result the fastening of the flexible connecting element 10 to the housing 1 is increased overall.

Fig. 5a und 5b illustrieren das erfindungsgemäße Verfahren zur Anbindung des flexiblen Verbindungselementes 10 an dem Endabschnitt 7 und der Innenwand 11 des Gehäuses 1. 5a and 5b illustrate the method according to the invention for connecting the flexible connecting element 10 to the end section 7 and the inner wall 11 of the housing 1.

Erfindungsgemäß ist es dabei zunächst vorgesehen, dass das flexible Verbindungselement 10 mit seinem ersten Anbindungsabschnitt 12 über den Endabschnitt 7 des Saugstutzens 6 übergestülpt wird.According to the invention, it is initially provided that the flexible connecting element 10 with its first connection section 12 is slipped over the end section 7 of the suction nozzle 6.

Um das flexible Verbindungselement 10, insbesondere dessen ersten Anbindungsabschnitt 12, in eine für die Anbindung am Gehäuse 1 günstige Position zu bringen, kann es gegebenenfalls vorgesehen sein, das flexible Verbindungselement 10 in Richtung Gehäuse 1 vorzuschieben, bis das erste Ende 20 des ersten Anbindungsabschnittes 12 zumindest abschnittsweise, bei dem gezeigten Ausführungsbeispiel des flexiblen Verbindungselementes 10 sogar flächig, an der Innenwand 11 des Gehäuses 1 anliegt und somit unmittelbar an dieses Gehäuse 1 anschließt. Ob ein solches Vorschieben nötig ist, hängt insbesondere von der Länge des Endabschnittes 7 ab.In order to bring the flexible connecting element 10, in particular its first connection section 12, into a position that is favorable for the connection to the housing 1, it can optionally be provided to push the flexible connection element 10 in the direction of the housing 1 until the first end 20 of the first connection section 12 at least in sections, in the illustrated embodiment of the flexible connecting element 10 even flat, rests on the inner wall 11 of the housing 1 and thus directly connects to this housing 1. Whether such an advancement is necessary depends in particular on the length of the end section 7.

Im Anschluss an das Positionieren des flexiblen Verbindungselementes 10 auf dem Endabschnitt 7 wird ein Dorn 22 über die Auslassöffnung 17 in den Endabschnitt 7 eingeführt. Dieser Dorn 22 weist jedenfalls einen Längsabschnitt auf, der einen in axialer Richtung zunehmenden Durchmesser aufweist.Following the positioning of the flexible connecting element 10 on the end section 7, a mandrel 22 is inserted into the end section 7 via the outlet opening 17. In any case, this mandrel 22 has a longitudinal section which has a diameter which increases in the axial direction.

Erfindungsgemäß ist es vorgesehen, dass der Dorn 22, vorzugsweise mittels eines Hammers, entlang einer Treibrichtung 23 in Richtung Gehäuse 1 getrieben wird, sodass durch den einen zunehmenden Durchmesser aufweisenden Längsabschnitt des Dorns 22 eine kontinuierliche Aufweitung der äußeren Mantelfläche 18 des Endabschnittes 7 entsteht. Durch den somit entstandenen Erweiterungsabschnitt 13 des Endabschnittes 7 wird das flexible Verbindungselement 10 mittels Klemmung des ersten Anbindungsabschnittes 12 an der Innenwand 11 des Gehäuses 1 fixiert angebunden.According to the invention, the mandrel 22 is driven, preferably by means of a hammer, along a driving direction 23 in the direction of the housing 1, so that the longitudinal section of the mandrel 22, which has an increasing diameter, results in a continuous widening of the outer lateral surface 18 of the end section 7. Due to the expansion section 13 of the end section 7 thus created, the flexible connecting element 10 is fixedly connected to the inner wall 11 of the housing 1 by clamping the first connecting section 12.

BEZUGSZEICHENLISTEREFERENCE SIGN LIST

11
Gehäusecasing
22nd
ZylinderblockCylinder block
33rd
ZylinderdeckelCylinder cover
44th
VentilplatteValve plate
55
AntriebseinheitDrive unit
66
SaugstutzenSuction port
77
Endabschnitt des SaugstutzensEnd section of the suction nozzle
88th
SaugschalldämpferSuction silencer
99
Ansaugöffnung des SaugschalldämpfersIntake opening of the suction silencer
1010th
flexibles Verbindungselementflexible connector
1111
Innenwand des GehäusesInner wall of the housing
1212th
erster Anbindungsabschnittfirst connection section
1313
ErweiterungsabschnittExtension section
1414
Halteelement (Kreisring)Retaining element (circular ring)
1515
zweiter Anbindungsabschnittsecond connection section
1616
DistanzabschnittDistance section
1717th
Auslassöffnung des EndabschnittesOutlet opening of the end section
1818th
äußere Mantelfläche des Erweiterungsabschnittesouter lateral surface of the extension section
1919th
Ende des Erweiterungsabschnittes, welches dem Saugschalldämpfer zuweistEnd of the extension section, which assigns the suction silencer
2020
erstes Ende des ersten Anbindungsabschnittesfirst end of the first connection section
2121
zweites Ende des ersten Anbindungsabschnittessecond end of the first connection section
2222
Dornmandrel
2323
TreibrichtungDriving direction

Claims (12)

  1. An encapsulated refrigerant compressor comprising
    - a drive unit (5),
    - a cylinder block (2) which comprises at least one cylinder and a piston that is in operative connection with the drive unit (5) and moves back and forth within the cylinder,
    - a cylinder cover (3) which is connected to the cylinder block (2) via a valve plate (4), wherein the valve plate (4) comprises at least one inlet valve and at least one outlet valve in order to enable a flow, caused by the piston movement, of refrigerant into the cylinder via the inlet valve and out of the cylinder via the outlet valve,
    - a housing (1) which encloses at least the drive unit (5), the cylinder block (2), and the cylinder cover (3),
    - an end segment (7) of a suction connection piece (6) for the refrigerant, which end segment (7) protrudes into the housing (1) and has an outlet opening (17) via which refrigerant can flow into the interior of the housing (1),
    - a suction sound damper (8), which suction sound damper (8) comprises at least one suction opening (9) facing the end segment (7), and
    - a flexible connection element (10) which produces a flow connection between the end segment (7) and the suction opening (9) of the suction sound damper (8) in order to enable a transfer flow of refrigerant from the suction connection piece (6) into the at least one suction sound damper (8) via the end segment (7),
    - wherein means for attaching the flexible connection element (10) to the end segment (7) and an inner wall (11) of the housing (1) are provided,
    wherein the end segment (7) itself is the means for attaching the flexible connection element (10) to the end segment (7) and the inner wall (11) of the housing (1), wherein the end segment (7) is embodied in the form of a pipe and comprises an enlargement segment (13), the outer jacket surface (18) of which widens, preferably continuously, in a direction pointing towards the suction sound damper (8), wherein the flexible connection element (10) comprises a first attachment segment (12) which is arranged between the end (19) of the enlargement segment (13) that faces the suction sound damper (8) and the inner wall (11) such that it surrounds the end segment (7), characterized in that the first attachment segment (12) bears with the one end (20) thereof against the inner wall (11) and bears with the other end (21) thereof against the preferably continuously expanding enlargement segment (13).
  2. The encapsulated refrigerant compressor according to claim 1, characterized in that the enlargement segment (13) connects directly to the inner wall (11).
  3. The encapsulated refrigerant compressor according to claim 1 or 2, characterized in that a spacer segment (16) runs between the inner wall (11) and the enlargement segment (13) .
  4. The encapsulated refrigerant compressor according to one of claims 1 through 3, characterized in that the enlargement segment (13) comprises the outlet opening (17).
  5. The encapsulated refrigerant compressor according to one of claims 1 through 3, characterized in that the preferably continuous widening of the outer jacket surface (18) of the enlargement segment (13) is produced by means of a bending-open or crimping.
  6. The encapsulated refrigerant compressor according to one of claims 1 through 5, characterized in that the first attachment segment (12) is clamped by the inner wall (11) and the enlargement segment (13).
  7. The encapsulated refrigerant compressor according to one of the preceding claims, characterized in that an additional retaining element (14) is provided which surrounds the enlargement segment (13) and/or the spacer segment (16).
  8. The encapsulated refrigerant compressor according to claim 7, characterized in that the first attachment segment (12) is clamped between the inner wall (11) and the retaining element (14).
  9. The encapsulated refrigerant compressor according to claim 7 or 8, characterized in that the additional retaining element (14) is manufactured from plastic or steel.
  10. The encapsulated refrigerant compressor according to one of the preceding claims, characterized in that the flexible connection element (10) is embodied as a bellows.
  11. The encapsulated refrigerant compressor according to one of the preceding claims, characterized in that the flexible connection element (10) comprises a second attachment segment (15) that is fastened to the suction sound damper (8) in the region of the suction opening (9).
  12. A method for attaching a flexible connection element (10) to an end segment (7) of a suction connection piece (6), which segment (7) is spaced inwards from the wall of a housing (1) of an encapsulated refrigerant compressor and which comprises an outlet opening (17) for the refrigerant, wherein the method comprises the following steps:
    - a pulling of a first attachment segment (12) of the flexible connection element (10) over the end segment (7) and preferably a sliding-forward of the first attachment segment (12) in the direction of the housing (1),
    - an insertion of a mandrel (22) into the outlet opening (17), which mandrel has an increasing diameter in an axial direction,
    - a driving of the mandrel (22), preferably by means of a hammer, in the direction of the housing (1) for a, preferably continuous, widening of the outer jacket surface (18) of the end segment (7).
EP16819889.3A 2015-12-21 2016-12-19 Encapsulated refrigerant compressor Active EP3394442B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATGM50227/2015U AT15190U1 (en) 2015-12-21 2015-12-21 CAPACITATED REFRIGERANT COMPRESSOR
PCT/EP2016/081728 WO2017108682A1 (en) 2015-12-21 2016-12-19 Encapsulated refrigerant compressor

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EP3394442B1 true EP3394442B1 (en) 2020-03-11

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CN (1) CN108779769B (en)
AT (1) AT15190U1 (en)
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CN116044716B (en) * 2022-12-30 2025-07-25 青岛万宝压缩机有限公司 Vacuum sealing double-layer noise reduction shell, compressor and vacuumizing method

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Publication number Publication date
CN108779769B (en) 2020-06-12
AT15190U1 (en) 2017-02-15
WO2017108682A1 (en) 2017-06-29
EP3394442A1 (en) 2018-10-31
US11795930B2 (en) 2023-10-24
CN108779769A (en) 2018-11-09
US20210381500A1 (en) 2021-12-09
US20190085837A1 (en) 2019-03-21
US11493032B2 (en) 2022-11-08

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