EP3633195A1 - Refrigerant compressor - Google Patents
Refrigerant compressor Download PDFInfo
- Publication number
- EP3633195A1 EP3633195A1 EP18198062.4A EP18198062A EP3633195A1 EP 3633195 A1 EP3633195 A1 EP 3633195A1 EP 18198062 A EP18198062 A EP 18198062A EP 3633195 A1 EP3633195 A1 EP 3633195A1
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- EP
- European Patent Office
- Prior art keywords
- valve
- valve plate
- refrigerant compressor
- suction
- pressure
- 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.)
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Classifications
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- 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
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05C—INDEXING SCHEME RELATING TO MATERIALS, MATERIAL PROPERTIES OR MATERIAL CHARACTERISTICS FOR MACHINES, ENGINES OR PUMPS OTHER THAN NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES
- F05C2253/00—Other material characteristics; Treatment of material
- F05C2253/04—Composite, e.g. fibre-reinforced
Definitions
- the present invention relates to a refrigerant compressor comprising a piston-cylinder unit which can be driven by means of an electrical drive unit and has a cylinder housing for the cyclical compression of refrigerant, wherein a valve plate having a suction opening and a pressure opening is fastened to the cylinder housing, wherein a suction valve designed as a flutter valve and a pressure valve designed as a flutter valve are provided for intermittently closing the suction opening or pressure opening.
- Hermetically sealed refrigerant compressors have been known for a long time and are mainly used in refrigerators or shelves.
- the refrigerant process as such has also been known for a long time.
- Refrigerant is heated by energy absorption from the room to be cooled in an evaporator and finally overheated and pumped to a higher pressure level by means of the refrigerant compressor with a piston-cylinder unit, where it emits heat via a condenser and a throttle, in which a pressure reduction and the cooling of the refrigerant takes place, is conveyed back into the evaporator.
- a valve plate is attached to an end of the piston-cylinder unit opposite a piston, the valve plate having a suction opening and a pressure opening.
- the suction opening in the valve plate is closed in the compression cycle by a suction valve located on the side of the valve plate facing the piston-cylinder unit.
- the suction valve opens in a certain crank angle range, as a result of which refrigerant can flow into the piston-cylinder unit.
- the suction valve folds back onto the suction opening and closes it.
- the pressure opening in the valve plate is closed in the suction cycle by a pressure valve lying on the side of the valve plate facing away from the piston-cylinder unit.
- the pressure on the pressure valve increases until it opens in a certain crank angle range in order to allow compressed refrigerant to pass into a pressure path.
- the pressure valve closes again on the pressure opening and closes it.
- valve plates are preferably made of a metallic material - relatively complex and cost-intensive - which is characterized by good heat transfer. That is, when using metallic valve plates, the heat of the refrigerant, which is compressed cyclically in the piston-cylinder unit, is released into an interior of a compressor housing of the refrigerant compressor. This leads to heating of the interior of the compressor housing and subsequently to heat transfer to the refrigerant in the suction muffler. This reduces the efficiency of the refrigerant compressor, since the technical work required for the compression process is increased by a high suction temperature of the refrigerant.
- temperature increases in the interior of the compressor housing should be reduced.
- the task set out in the case of a refrigerant compressor comprises a piston-cylinder unit which can be driven by means of an electric drive unit and has a cylinder housing for the cyclical compression of refrigerant, a valve plate having a suction opening and a pressure opening being fastened to the cylinder housing, a suction valve designed as a flap valve and a pressure valve designed as a flutter valve for intermittently closing the suction opening or pressure opening are provided, according to the invention, in that the valve plate comprises a fiber-reinforced plastic.
- valve plate is constructed, at least in sections, from fiber-reinforced plastic.
- valve plate Due to the at least partial construction of the valve plate made of fiber-reinforced plastic, the valve plate has a poorer heat transfer than known valve plates. As a result, less heat from the refrigerant, which is compressed cyclically in the piston-cylinder unit, is released into an interior of a compressor housing of the refrigerant compressor according to the invention.
- the ratio of mass to rigidity is also positively influenced by the use of a fiber-reinforced plastic in the valve plate, at least in sections. I.e. compared to the valve plate made of the metallic material, the valve plate made of fiber-reinforced plastic has a significantly lower mass with the same rigidity and is easier and cheaper to manufacture.
- valve plate consists of fiber-reinforced plastic, the fiber reinforcement comprising glass fibers and / or carbon fibers and / or aramid fibers.
- valve plate made of fiber-reinforced plastic increases the rigidity while maintaining the same mass.
- the valve plate made of fiber-reinforced plastic is additionally provided with ribs in order to further increase the rigidity.
- the valve plate, which is made of fiber-reinforced plastic to have a metallic core in order to further increase the rigidity.
- valve plate is characterized by the structure of fiber-reinforced plastic by poorer heat transfer. I.e. less heat of the refrigerant, which is cyclically compressed in the piston-cylinder unit, is released into an interior of a compressor housing of the refrigerant compressor according to the invention.
- valve plate comprises a fabric made of glass fibers and / or carbon fibers and / or aramid fibers.
- the fabric made of glass fibers and / or carbon fibers and / or aramid fibers is very resistant. Since the valve plate is a highly stressed component, it is very advantageous if the valve plate comprises the fabric made of glass fibers and / or carbon fibers and / or aramid fibers.
- thermoplastic forms a matrix which surrounds the fabric made of glass fibers and / or plastic fibers and / or aramid fibers.
- the fabric made of glass fibers and / or plastic fibers and / or aramid fibers is responsible for high rigidity and high strength.
- thermoplastic reinforced with glass fibers and / or with plastic fibers and / or with aramid fibers can be adjusted with the aid of the volume fraction of the glass fibers and / or the plastic fibers and / or the aramid fibers.
- the tissue is further processed into the valve plate using a pressing tool.
- This manufacturing process is particularly cost-effective because a large number of a desired end product can be produced with the pressing tool.
- the glass fibers and / or carbon fibers and / or aramid fibers are embroidered or woven together.
- Embroidery in particular creates a complex fiber orientation, which causes quasi-isotropic properties.
- thermoplastic is applied to the fabric for the manufacture of the valve plate.
- the thermoplastic forms a matrix which surrounds the fabric made of glass fibers and / or plastic fibers and / or aramid fibers.
- thermoplastic reinforced with glass fibers and / or with plastic fibers and / or with aramid fibers it would be conceivable for the mechanical and thermal properties of the thermoplastic reinforced with glass fibers and / or with plastic fibers and / or with aramid fibers to be set with the aid of the volume fraction of the glass fibers and / or the plastic fibers and / or aramid fibers.
- valve plate consists of a thermoplastic material with glass fibers and / or carbon fibers and / or aramid fibers and is obtainable by means of an injection molding process, the thermoplastic material being sprayed together with the glass fibers and / or carbon fibers and / or aramid fibers is.
- both the fabric, consisting of glass fibers and / or carbon fibers and / or aramid fibers, and the thermoplastic material are sprayed together to produce the valve plate.
- the valve plate consists of a laminate, the laminate containing glass fibers and / or carbon fibers and / or aramid fibers and a matrix material.
- valve plate it would be conceivable for the valve plate to be punched out of the laminate, this method being characterized by particularly good economy and by a smaller number of parts.
- the laminate has poor heat transfer, which is why less heat from the refrigerant, which is compressed cyclically in the piston-cylinder unit, is released into an interior of a compressor housing of the refrigerant compressor according to the invention.
- the matrix material is a synthetic resin, preferably an epoxy resin and / or a polyurethane resin.
- a matrix material made of synthetic resin is characterized on the one hand by good availability and on the other hand by good economy.
- the suction valve and / or the pressure valve comprise a fiber-reinforced plastic.
- the suction valve and / or the pressure valve is constructed at least in sections from fiber-reinforced plastic.
- valve plate and the suction valve be constructed at least in sections from fiber-reinforced plastic and for the pressure valve to be made of a metallic material.
- the valve plate and the pressure valve are constructed at least in sections from fiber-reinforced plastic and that the suction valve consists of the metallic material.
- the valve plate, the suction valve and the pressure valve are made of fiber-reinforced plastic.
- the mass of the suction valve and / or the pressure valve is correspondingly lower, which increases the efficiency of the refrigerant compressor according to the invention, since the suction valve and / or the pressure valve is easier to open.
- the ratio of mass to rigidity is also positively influenced by the use of a fiber-reinforced plastic at least in sections for the suction valve and / or the pressure valve. I.e. compared to the metallic material, the fiber-reinforced plastic has a significantly lower mass with the same rigidity. This has a particularly positive effect when opening and closing the suction valve and the pressure valve, since there are fewer vibrations.
- the suction valve and / or the pressure valve on the suction opening or on the pressure opening becomes smoother at the same opening speed, whereby the valve plate is less stressed.
- suction valve and the pressure valve and the valve plate consist of fiber-reinforced plastic, then these can be produced together, ie in one piece, for example by an injection molding process. This ensures particularly cost-effective production.
- parts of a suction muffler and / or a pressure muffler also consist of fiber-reinforced plastic. These parts can then be together, i.e. can be produced in one piece, for example by means of injection molding, with the valve plate and optionally with the suction or pressure valve. This results in a lower number of parts of the refrigerant compressor according to the invention, since fewer clamping and screwing elements and seals are necessary. Furthermore, there is no subsequent assembly of the parts. This ensures cost-effective and time-saving production.
- both the suction valve and the pressure valve and the valve plate could be made of fiber-reinforced plastic, but not to be made in one piece. Then it would be conceivable that the suction valve and the pressure valve are clamped or welded to the valve plate.
- the suction valve and / or the pressure valve can be obtained by the same methods as the valve plate.
- the suction valve and / or the pressure valve can thus be produced according to the following methods: pressing the fabric in the pressing tool, overmolding the fabric with the thermoplastic material and spraying the thermoplastic material together with the glass fibers and / or carbon fibers and / or aramid fibers.
- the Fig. 1 shows a sectional view of a known refrigerant compressor 1.
- the refrigerant compressor 1 comprises a compressor housing 15, a drive unit 2, a piston-cylinder unit 4, in which the cyclical compression of a refrigerant takes place, and a valve plate 7 made of a metallic material.
- a suction valve 9 and a pressure valve 10 are designed as flutter valves and are also made of a metallic material and clamped to the valve plate 7.
- a suction muffler and a pressure muffler are detachably, for example screwed, connected to the valve plate 7. At least one seal is arranged between the suction muffler and the valve plate 7 and between the pressure muffler and the valve plate 7.
- Both the suction valve 9 and the pressure valve 10 must have a corresponding thickness in order to withstand the loads during the operation of the refrigerant compressor 1. Therefore, a not negligible effort or effort is required to open the suction valve 9 and the pressure valve 10. That is, the known suction valve 9 and the known pressure valve 10 lead to a reduction in the efficiency of the refrigerant compressor 1.
- the impact speed of the known suction valve 9 and the known pressure valve 10 is limited to a suction opening 5 and to a pressure opening 6, since on the one hand the suction valve 9 and the pressure valve 10 run the risk of being destroyed if the opening speed is too high. On the other hand, it is possible that the suction opening 5 and the pressure opening 6 are damaged by the mass of the suction valve 9 and the pressure valve 10 due to an excessively high impact speed and are no longer leakproof.
- valve plate 7, the suction valve 9 and the pressure valve 10 are made of fiber-reinforced plastic.
- Fig. 2 shows a plan view of the rectangular valve plate 7 made of fiber-reinforced plastic with the pressure valve 10 made of fiber-reinforced plastic and a pressure valve holder 17.
- the suction valve 9 (in Fig. 2 not visible), which is preferably also made of fiber-reinforced plastic.
- the pressure valve holder 17 fastens the pressure valve 10 to the valve plate 7 and serves as a limit stop for the pressure valve 10.
- the valve plate 7, the pressure valve 10 and the suction valve 9 are produced in one piece by means of an injection molding process. It is used to manufacture a Component 16, consisting of the valve plate 7, the pressure valve 10 and the suction valve 9, preferably a fabric made of glass fibers overmolded with a thermoplastic material.
- the one-piece design eliminates the need to assemble the individual parts after production.
- the mass of the component 16 is reduced by the use of the thermoplastic material with the fabric made of glass fibers, which is why the pressure valve 10 and the suction valve 9 can be opened more easily in an operating state of the refrigerant compressor 1 according to the invention.
- An additional advantage is that the component 16 has poorer heat transfer, as a result of which less heat from the refrigerant, which is compressed cyclically in the piston-cylinder unit 4, is emitted into an interior of a compressor housing 15 of the refrigerant compressor 1 according to the invention.
- the ratio of mass to rigidity is also positively influenced by the use of the thermoplastic with the fabric made of glass fibers in the component 16.
- Fig. 3 shows a plan view of the rectangular valve plate 7 made of fiber-reinforced plastic with the pressure valve 10 made of fiber-reinforced plastic and the pressure valve holder 17 and with a part of a suction muffler made of fiber-reinforced plastic 14.
- the structure of the in Fig. 3 The embodiment shown essentially corresponds to the embodiment in FIG Fig. 2 , only that additionally the part of the suction muffler 14 in one piece with the component 16, consisting of valve plate 7, suction valve 9 and pressure valve 10, is made. This results in a further reduction in the individual parts of the refrigerant compressor 1 according to the invention and leads to simpler manufacture.
- the pressure silencer is in Fig. 3 not shown.
- this can also consist of fiber-reinforced plastic and be made at least partially in one piece with the component 16.
- Fig. 4 shows a plan view of the suction or pressure valve 10 made of fiber-reinforced plastic, which is made of fiber-reinforced plastic.
- the suction valve 9 or the pressure valve 10 comprises a closure section 12, a fastening section 11 and an intermediate section 13.
- the fastening section 11 serves for the connection to the valve plate 7.
- both the suction valve 9 and the pressure valve 10 and the valve plate 7 are made of fiber-reinforced material Plastic, the fastening section 11 can be integrally connected to the valve plate 7.
- the closing section 12 of the suction valve 9 serves to cover the suction opening 5 and the closing section 12 of the pressure valve 10 serves to cover the pressure opening 6.
- Between the fastening section 11 and the closing section 12 there is the intermediate section 13 both in the suction valve 9 and in the pressure valve 10 is geometrically designed so that the respective closure section 12 is easy to open.
- Fig. 5 shows a sectional view of the suction valve 9 or pressure valve 10 made of fiber-reinforced plastic Fig. 4 according to the in Fig. 4 drawn section line AA.
- the closure section 12 of the suction valve 9 or the pressure valve 10 has a bulge 8 in the direction of the suction opening 5 or the pressure opening 6.
- the closure section 12 is formed in a trowel shape, so that the trowel-shaped closure section 12 covers the suction opening 9 or the pressure opening 10.
- Fig. 6 shows a plan view of a round valve plate made of fiber-reinforced plastic with a pressure valve made of fiber-reinforced plastic.
- the suction valve 9 (in Fig. 6 not visible), which is preferably also made of fiber-reinforced plastic.
- the pressure valve holder 17 can be omitted; the pressure valve 10 is fastened directly to the valve plate 7, for example by means of a welded connection or a riveted connection.
- the attachment of the pressure valve 10 with or without a pressure valve holder 17 is independent of the shape of the valve plate 7.
- the round valve plate 7 could also be made Fig. 6 a pressure valve holder 17, or the rectangular valve plate 7 could Fig. 2 be carried out without a pressure valve holder 17.
- Fig. 7 shows a top view of the round valve plate 7 made of fiber-reinforced plastic with the pressure valve 10 made of fiber-reinforced plastic and with part of a suction muffler 14 made of fiber-reinforced plastic and part of a pressure muffler 18 made of fiber-reinforced plastic.
- the structure of the in Fig. 7 The embodiment shown essentially corresponds to the embodiment in FIG Fig. 6 , only that in addition the part of the suction muffler 14 and the part of the pressure muffler 18 in one piece with the valve plate 7 is made. This results in a further reduction in the individual parts of the refrigerant compressor 1 according to the invention and leads to simpler manufacture.
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Abstract
Kältemittelverdichter (1) umfassend eine mittels einer elektrischen Antriebseinheit (2) antreibbare, ein Zylindergehäuse (3) aufweisende Kolben-Zylinder-Einheit (4) zur taktweisen Verdichtung von Kältemittel, wobei eine eine Saugöffnung (5) und eine Drucköffnung (6) aufweisende Ventilplatte (7) am Zylindergehäuse (8) befestigt ist, wobei ein als Flatterventil ausgeführtes Saugventil (9) und ein als Flatterventil ausgeführtes Druckventil (10) zur taktweisen Verschließung der Saugöffnung (5) bzw. Drucköffnung (6) vorgesehen sind. Es wird vorgeschlagen, dass die Ventilplatte (7) einen faserverstärkten Kunststoff umfasst.Refrigerant compressor (1) comprising a piston-cylinder unit (4) which can be driven by means of an electric drive unit (2) and has a cylinder housing (3) for the cyclical compression of refrigerant, a valve plate having a suction opening (5) and a pressure opening (6) (7) is fastened to the cylinder housing (8), a suction valve (9) designed as a flutter valve and a pressure valve (10) designed as a flutter valve for intermittently closing the suction opening (5) or pressure opening (6) are provided. It is proposed that the valve plate (7) comprise a fiber-reinforced plastic.
Description
Die vorliegende Erfindung betrifft einen Kältemittelverdichter umfassend eine mittels einer elektrischen Antriebseinheit antreibbare, ein Zylindergehäuse aufweisende Kolben-Zylinder-Einheit zur taktweisen Verdichtung von Kältemittel,
wobei eine eine Saugöffnung und eine Drucköffnung aufweisende Ventilplatte am Zylindergehäuse befestigt ist, wobei ein als Flatterventil ausgeführtes Saugventil und ein als Flatterventil ausgeführtes Druckventil zur taktweisen Verschließung der Saugöffnung bzw. Drucköffnung vorgesehen sind.The present invention relates to a refrigerant compressor comprising a piston-cylinder unit which can be driven by means of an electrical drive unit and has a cylinder housing for the cyclical compression of refrigerant,
wherein a valve plate having a suction opening and a pressure opening is fastened to the cylinder housing, wherein a suction valve designed as a flutter valve and a pressure valve designed as a flutter valve are provided for intermittently closing the suction opening or pressure opening.
Hermetisch gekapselte Kältemittelverdichter sind seit langem bekannt und kommen vorwiegend in Kühlschränken oder -regalen zum Einsatz. Der Kältemittelprozess als solches ist ebenfalls seit langem bekannt. Kältemittel wird dabei durch Energieaufnahme aus dem zu kühlenden Raum in einem Verdampfer erhitzt und schließlich überhitzt und mittels des Kältemittelverdichters mit einer Kolben-Zylinder-Einheit auf ein höheres Druckniveau gepumpt, wo es Wärme über einen Kondensator abgibt und über eine Drossel, in der eine Druckreduzierung und die Abkühlung des Kältemittels erfolgt, wieder zurück in den Verdampfer befördert wird.Hermetically sealed refrigerant compressors have been known for a long time and are mainly used in refrigerators or shelves. The refrigerant process as such has also been known for a long time. Refrigerant is heated by energy absorption from the room to be cooled in an evaporator and finally overheated and pumped to a higher pressure level by means of the refrigerant compressor with a piston-cylinder unit, where it emits heat via a condenser and a throttle, in which a pressure reduction and the cooling of the refrigerant takes place, is conveyed back into the evaporator.
Um den Verdichtungsraum der Kolben-Zylinder-Einheit zu verschließen, ist eine Ventilplatte an einem einem Kolben gegenüberliegenden Ende der Kolben-Zylinder-Einheit befestigt, wobei die Ventilplatte eine Saugöffnung und eine Drucköffnung aufweist.In order to close the compression chamber of the piston-cylinder unit, a valve plate is attached to an end of the piston-cylinder unit opposite a piston, the valve plate having a suction opening and a pressure opening.
Die Saugöffnung in der Ventilplatte ist im Verdichtungstakt durch ein auf der der Kolben-Zylinder-Einheit zugewandten Seite der Ventilplatte liegendes Saugventil verschlossen. Während eines Saugtakts öffnet sich das Saugventil in einem gewissen Kurbelwinkelbereich, wodurch Kältemittel in die Kolben-Zylinder-Einheit einströmen kann. Ist der Saugtakt beendet, klappt das Saugventil wieder auf die Saugöffnung und verschließt diese.The suction opening in the valve plate is closed in the compression cycle by a suction valve located on the side of the valve plate facing the piston-cylinder unit. During a suction cycle, the suction valve opens in a certain crank angle range, as a result of which refrigerant can flow into the piston-cylinder unit. When the suction cycle has ended, the suction valve folds back onto the suction opening and closes it.
Im Gegensatz dazu ist die Drucköffnung in der Ventilplatte im Saugtakt durch ein auf der von der Kolben-Zylinder-Einheit abgewandten Seite der Ventilplatte liegendes Druckventil verschlossen. Während eines Verdichtungstakts erhöht sich der Druck auf das Druckventil, bis dieses in einem gewissen Kurbelwinkelbereich öffnet, um den Übertritt von verdichtetem Kältemittel in eine Druckstrecke zu ermöglichen. Ist der Verdichtungstakt beendet, klappt das Druckventil wieder auf die Drucköffnung und verschließt diese.In contrast to this, the pressure opening in the valve plate is closed in the suction cycle by a pressure valve lying on the side of the valve plate facing away from the piston-cylinder unit. During a compression stroke, the pressure on the pressure valve increases until it opens in a certain crank angle range in order to allow compressed refrigerant to pass into a pressure path. When the compression stroke has ended, the pressure valve closes again on the pressure opening and closes it.
Nachteilig bei den bekannten Ventilplatten ist, dass diese vorzugsweise aus einem metallischen Werkstoff - relativ aufwendig und kostenintensiv - hergestellt sind, der sich durch eine gute Wärmeübertragung auszeichnet. D.h. bei einer Verwendung von metallischen Ventilplatten wird die Wärme des Kältemittels, das in der Kolben-Zylinder-Einheit zyklisch verdichtet wird, in ein Inneres eines Verdichtergehäuses des Kältemittelverdichters abgegeben. Dies führt zu einer Erwärmung des Inneren des Verdichtergehäuses und in weiterer Folge zu einem Wärmeübertrag auf das im Saugschalldämpfer befindliche Kältemittel. Dadurch wird der Wirkungsgrad des Kältemittelverdichters verringert, da die erforderliche technische Arbeit für den Verdichtungsvorgang durch eine hohe Einsaugtemperatur des Kältemittels erhöht ist.A disadvantage of the known valve plates is that they are preferably made of a metallic material - relatively complex and cost-intensive - which is characterized by good heat transfer. That is, when using metallic valve plates, the heat of the refrigerant, which is compressed cyclically in the piston-cylinder unit, is released into an interior of a compressor housing of the refrigerant compressor. This leads to heating of the interior of the compressor housing and subsequently to heat transfer to the refrigerant in the suction muffler. This reduces the efficiency of the refrigerant compressor, since the technical work required for the compression process is increased by a high suction temperature of the refrigerant.
Auch hinsichtlich einer Motorkühlung ist eine Erwärmung des Inneren des Verdichtergehäuses aufgrund der über die Ventilplatte abgegebenen Wärme des Kältemittels unerwünscht.With regard to engine cooling as well, heating of the interior of the compressor housing is undesirable because of the heat of the refrigerant given off via the valve plate.
Es ist daher eine Aufgabe der Erfindung einen Kältemittelverdichter zur Verfügung zu stellen, der die oben genannten Nachteile vermeidet. Insbesondere sollen Temperaturerhöhungen im Inneren des Verdichtergehäuses vermindert werden.It is therefore an object of the invention to provide a refrigerant compressor which avoids the disadvantages mentioned above. In particular, temperature increases in the interior of the compressor housing should be reduced.
Die eingangs gestellte Aufgabe wird bei einem Kältemittelverdichter umfassend eine mittels einer elektrischen Antriebseinheit antreibbare, ein Zylindergehäuse aufweisende Kolben-Zylinder-Einheit zur taktweisen Verdichtung von Kältemittel, wobei eine eine Saugöffnung und eine Drucköffnung aufweisende Ventilplatte am Zylindergehäuse befestigt ist, wobei ein als Flatterventil ausgeführtes Saugventil und ein als Flatterventil ausgeführtes Druckventil zur taktweisen Verschließung der Saugöffnung bzw. Drucköffnung vorgesehen sind, erfindungsgemäß dadurch gelöst, dass die Ventilplatte einen faserverstärkten Kunststoff umfasst.The task set out in the case of a refrigerant compressor comprises a piston-cylinder unit which can be driven by means of an electric drive unit and has a cylinder housing for the cyclical compression of refrigerant, a valve plate having a suction opening and a pressure opening being fastened to the cylinder housing, a suction valve designed as a flap valve and a pressure valve designed as a flutter valve for intermittently closing the suction opening or pressure opening are provided, according to the invention, in that the valve plate comprises a fiber-reinforced plastic.
Somit ist die Ventilplatte zumindest abschnittsweise aus faserverstärktem Kunststoff aufgebaut.Thus, the valve plate is constructed, at least in sections, from fiber-reinforced plastic.
Durch den zumindest abschnittsweisen Aufbau der Ventilplatte aus faserverstärktem Kunststoff, weist die Ventilplatte eine schlechtere Wärmeübertragung als bekannte Ventilplatten auf. Dadurch wird weniger Wärme des Kältemittels, das in der Kolben-Zylinder-Einheit zyklisch verdichtet wird, in ein Inneres eines Verdichtergehäuses des erfindungsgemäßen Kältemittelverdichters abgegeben.Due to the at least partial construction of the valve plate made of fiber-reinforced plastic, the valve plate has a poorer heat transfer than known valve plates. As a result, less heat from the refrigerant, which is compressed cyclically in the piston-cylinder unit, is released into an interior of a compressor housing of the refrigerant compressor according to the invention.
Zusätzlich wird auch das Verhältnis von Masse zu Steifigkeit durch die zumindest abschnittsweise Verwendung eines faserverstärktem Kunststoffs bei der Ventilplatte positiv beeinflusst. D.h. verglichen mit der Ventilplatte aus dem metallischen Werkstoff weist die Ventilplatte aus faserverstärktem Kunststoff eine deutlich geringere Masse bei gleicher Steifigkeit sowie eine einfachere und günstigere Herstellbarkeit auf.In addition, the ratio of mass to rigidity is also positively influenced by the use of a fiber-reinforced plastic in the valve plate, at least in sections. I.e. compared to the valve plate made of the metallic material, the valve plate made of fiber-reinforced plastic has a significantly lower mass with the same rigidity and is easier and cheaper to manufacture.
Bei einer bevorzugten Ausführungsvariante des erfindungsgemäßen Kältemittelverdichters ist vorgesehen, dass die Ventilplatte aus faserverstärktem Kunststoff besteht, wobei die Faserverstärkung Glasfasern und/oder Kohlefasern und/oder Aramidfasern umfasst.In a preferred embodiment of the refrigerant compressor according to the invention it is provided that the valve plate consists of fiber-reinforced plastic, the fiber reinforcement comprising glass fibers and / or carbon fibers and / or aramid fibers.
Durch den Aufbau der Ventilplatte aus faserverstärktem Kunststoff erhöht sich bei gleichbleibender Masse die Steifigkeit. Selbstverständlich wäre es vorstellbar, dass die aus faserverstärktem Kunststoff bestehende Ventilplatte zusätzlich mit Rippen versehen ist, um die Steifigkeit weiter zu erhöhen. Außerdem wäre es möglich, dass die aus faserverstärktem Kunststoff bestehende Ventilplatte einen metallischen Kern aufweist, um die Steifigkeit weiter zu erhöhen.The structure of the valve plate made of fiber-reinforced plastic increases the rigidity while maintaining the same mass. Of course, it would be conceivable that the valve plate made of fiber-reinforced plastic is additionally provided with ribs in order to further increase the rigidity. It would also be possible for the valve plate, which is made of fiber-reinforced plastic, to have a metallic core in order to further increase the rigidity.
Ebenso ist die Ausformung bzw. Anformung - bzw. die einstückige Herstellung mit der Ventilplatte - von strömungsbeeinflussenden Bauteilen vorstellbar.The shaping or molding - or the one-piece production with the valve plate - of flow-influencing components is also conceivable.
Weiters zeichnet sich die Ventilplatte durch den Aufbau aus faserverstärktem Kunststoff durch eine schlechtere Wärmeübertragung aus. D.h. es wird weniger Wärme des Kältemittels, das in der Kolben-Zylinder-Einheit zyklisch verdichtet wird, in ein Inneres eines Verdichtergehäuses des erfindungsgemäßen Kältemittelverdichters abgegeben.Furthermore, the valve plate is characterized by the structure of fiber-reinforced plastic by poorer heat transfer. I.e. less heat of the refrigerant, which is cyclically compressed in the piston-cylinder unit, is released into an interior of a compressor housing of the refrigerant compressor according to the invention.
Bevorzugt ist bei dem erfindungsgemäßen Kältemittelverdichter vorgesehen, dass die Ventilplatte ein Gewebe aus Glasfasern und/oder Kohlefasern und/oder Aramidfasern umfasst.It is preferably provided in the refrigerant compressor according to the invention that the valve plate comprises a fabric made of glass fibers and / or carbon fibers and / or aramid fibers.
Das Gewebe aus Glasfasern und/oder Kohlefasern und/oder Aramidfasern ist sehr widerstandsfähig. Da es sich bei der Ventilplatte um einen stark beanspruchten Bauteil handelt, ist es sehr vorteilhaft, wenn die Ventilplatte das Gewebe aus Glasfasern und/oder Kohlefasern und/oder Aramidfasern umfasst.The fabric made of glass fibers and / or carbon fibers and / or aramid fibers is very resistant. Since the valve plate is a highly stressed component, it is very advantageous if the valve plate comprises the fabric made of glass fibers and / or carbon fibers and / or aramid fibers.
Bei einer bevorzugten Ausführungsvariante des erfindungsgemäßen Kältemittelverdichters ist vorgesehen, dass die Ventilplatte durch folgendes Verfahren erhältlich ist:
- Bereitstellen des Gewebes aus Glasfasern und/oder Kohlefasern und/oder Aramidfasern, wobei das Gewebe weiters einen thermoplastischen Kunststoff, vorzugsweise zumindest einen Thermoplastfaden, aufweist;
- Verpressen des Gewebes in einem Presswerkzeug zur Herstellung der Ventilplatte.
- Providing the fabric made of glass fibers and / or carbon fibers and / or aramid fibers, the fabric further comprising a thermoplastic material, preferably at least one thermoplastic thread;
- Pressing the fabric in a press tool to produce the valve plate.
D.h. der thermoplastische Kunststoff bildet eine Matrix, die das Gewebe aus Glasfasern und/oder Kunststofffasern und/oder Aramidfasern umgibt. Das Gewebe aus Glasfasern und/oder Kunststofffasern und/oder Aramidfasern ist für eine hohe Steifigkeit und eine hohe Festigkeit verantwortlich.I.e. the thermoplastic forms a matrix which surrounds the fabric made of glass fibers and / or plastic fibers and / or aramid fibers. The fabric made of glass fibers and / or plastic fibers and / or aramid fibers is responsible for high rigidity and high strength.
Es wäre vorstellbar, dass mechanische und thermische Eigenschaften des mit Glasfasern und/oder mit Kunststofffasern und/oder mit Aramidfasern verstärkten thermoplastischen Kunststoffs mit Hilfe des Volumenanteils der Glasfasern und/oder der Kunststofffasern und/oder der Aramidfasern eingestellt werden.It would be conceivable that mechanical and thermal properties of the thermoplastic reinforced with glass fibers and / or with plastic fibers and / or with aramid fibers can be adjusted with the aid of the volume fraction of the glass fibers and / or the plastic fibers and / or the aramid fibers.
Nach einem Erwärmen wird das Gewebe mit Hilfe eines Presswerkzeugs zu der Ventilplatte weiterverarbeitet. Dieses Herstellungsverfahren ist besonders kostengünstig, da mit dem Presswerkzeug eine hohe Stückzahl eines gewünschten Endprodukts produziert werden kann.After heating, the tissue is further processed into the valve plate using a pressing tool. This manufacturing process is particularly cost-effective because a large number of a desired end product can be produced with the pressing tool.
Bevorzugt ist bei dem erfindungsgemäßen Kältemittelverdichter vorgesehen, dass der Schritt des Bereitstellens des Gewebes folgenden weiteren Teilschritt umfasst:
- Herstellen des Gewebes mittels eines Stick- oder Webeverfahrens.
- Manufacture of the fabric by means of an embroidery or weaving process.
D.h. die Glasfasern und/oder Kohlefasern und/oder Aramidfasern werden miteinander verstickt oder verwebt. Insbesondere durch das Versticken entsteht eine komplexe Faserorientierung, welche quasiisotrope Eigenschaften hervorruft.I.e. the glass fibers and / or carbon fibers and / or aramid fibers are embroidered or woven together. Embroidery in particular creates a complex fiber orientation, which causes quasi-isotropic properties.
Bei einer bevorzugten Ausführungsvariante des erfindungsgemäßen Kältemittelverdichters ist vorgesehen, dass die Ventilplatte durch folgendes Verfahren erhältlich ist:
- Bereitstellen des Gewebes aus Glasfasern und/oder Kohlefasern und/oder Aramidfasern;
- Umspritzen des Gewebes mit einem thermoplastischen Kunststoff mittels eines Spritzgussverfahrens zur Herstellung der Ventilplatte.
- Providing the fabric of glass fibers and / or carbon fibers and / or aramid fibers;
- Injection molding of the fabric with a thermoplastic by means of an injection molding process to produce the valve plate.
Mit Hilfe des Spritzgussverfahrens wird der thermoplastische Kunststoff zur Herstellung der Ventilplatte auf das Gewebe aufgebracht. D.h. der thermoplastische Kunststoff bildet eine Matrix, die das Gewebe aus Glasfasern und/oder Kunststofffasern und/oder Aramidfasern umgibt.With the help of the injection molding process, the thermoplastic is applied to the fabric for the manufacture of the valve plate. I.e. the thermoplastic forms a matrix which surrounds the fabric made of glass fibers and / or plastic fibers and / or aramid fibers.
Es wäre vorstellbar, dass mechanische und thermische Eigenschaften des mit Glasfasern und/oder mit Kunststofffasern und/oder mit Aramidfasern verstärkten thermoplastischen Kunststoffs mit Hilfe des Volumenanteils der Glasfasern und/oder der Kunststofffasern und/oder Aramidfasern eingestellt werden.It would be conceivable for the mechanical and thermal properties of the thermoplastic reinforced with glass fibers and / or with plastic fibers and / or with aramid fibers to be set with the aid of the volume fraction of the glass fibers and / or the plastic fibers and / or aramid fibers.
Bevorzugt ist bei dem erfindungsgemäßen Kältemittelverdichter vorgesehen, dass die Ventilplatte aus einem thermoplastischen Kunststoff mit Glasfasern und/oder Kohlefasern und/oder Aramidfasern besteht und mittels eines Spritzgussverfahrens erhältlich ist, wobei der thermoplastische Kunststoff gemeinsam mit den Glasfasern und/oder Kohlefasern und/oder Aramidfasern verspritzt ist.It is preferably provided in the refrigerant compressor according to the invention that the valve plate consists of a thermoplastic material with glass fibers and / or carbon fibers and / or aramid fibers and is obtainable by means of an injection molding process, the thermoplastic material being sprayed together with the glass fibers and / or carbon fibers and / or aramid fibers is.
D.h. sowohl das Gewebe, bestehend aus Glasfasern und/oder Kohlefasern und/oder Aramidfasern, als auch der thermoplastische Kunststoff werden, um die Ventilplatte herzustellen, gemeinsam verspritzt.
Bevorzugt ist bei dem erfindungsgemäßen Kältemittelverdichter vorgesehen, dass die Ventilplatte aus einem Laminat besteht, das Laminat enthaltend Glasfasern und/oder Kohlefasern und/oder Aramidfasern sowie ein Matrixmaterial.That is, both the fabric, consisting of glass fibers and / or carbon fibers and / or aramid fibers, and the thermoplastic material are sprayed together to produce the valve plate.
It is preferably provided in the refrigerant compressor according to the invention that the valve plate consists of a laminate, the laminate containing glass fibers and / or carbon fibers and / or aramid fibers and a matrix material.
Es wäre vorstellbar, dass die Ventilplatte aus dem Laminat gestanzt werden, wobei sich dieses Verfahren durch eine besonders gute Wirtschaftlichkeit sowie durch eine geringere Teileanzahl auszeichnet.It would be conceivable for the valve plate to be punched out of the laminate, this method being characterized by particularly good economy and by a smaller number of parts.
Außerdem ist vorteilhaft, dass das Laminat eine schlechte Wärmeübertragung aufweist, weshalb weniger Wärme des Kältemittels, das in der Kolben-Zylinder-Einheit zyklisch verdichtet wird, in ein Inneres eines Verdichtergehäuses des erfindungsgemäßen Kältemittelverdichters abgegeben wird.It is also advantageous that the laminate has poor heat transfer, which is why less heat from the refrigerant, which is compressed cyclically in the piston-cylinder unit, is released into an interior of a compressor housing of the refrigerant compressor according to the invention.
Bei einer bevorzugten Ausführungsvariante des erfindungsgemäßen Kältemittelverdichters ist vorgesehen, dass das Matrixmaterial ein Kunstharz ist, vorzugsweise ein Epoxidharz und/oder ein Polyurethanharz. Ein Matrixmaterial aus Kunstharz zeichnet sich einerseits durch eine gute Verfügbarkeit und andererseits durch eine gute Wirtschaftlichkeit aus.In a preferred embodiment variant of the refrigerant compressor according to the invention it is provided that the matrix material is a synthetic resin, preferably an epoxy resin and / or a polyurethane resin. A matrix material made of synthetic resin is characterized on the one hand by good availability and on the other hand by good economy.
Bevorzugt ist bei dem erfindungsgemäßen Kältemittelverdichter vorgesehen, dass das Saugventil und/oder das Druckventil einen faserverstärkten Kunststoff umfassen.It is preferably provided in the refrigerant compressor according to the invention that the suction valve and / or the pressure valve comprise a fiber-reinforced plastic.
Somit ist das Saugventil und/oder das Druckventil zumindest abschnittsweise aus faserverstärktem Kunststoff aufgebaut.Thus, the suction valve and / or the pressure valve is constructed at least in sections from fiber-reinforced plastic.
Es wäre somit vorstellbar, dass die Ventilplatte und das Saugventil zumindest abschnittsweise aus faserverstärktem Kunststoff aufgebaut sind und das Druckventil aus einem metallischen Werkstoff besteht. Es besteht auch die Möglichkeit, dass die Ventilplatte und das Druckventil zumindest abschnittsweise aus faserverstärktem Kunstoff aufgebaut sind und das Saugventil aus dem metallischen Werkstoff besteht. Natürlich wäre es auch möglich, dass die Ventilplatte, das Saugventil und das Druckventil aus faserverstärktem Kunststoff bestehen.It would thus be conceivable for the valve plate and the suction valve to be constructed at least in sections from fiber-reinforced plastic and for the pressure valve to be made of a metallic material. There is also Possibility that the valve plate and the pressure valve are constructed at least in sections from fiber-reinforced plastic and that the suction valve consists of the metallic material. Of course, it would also be possible for the valve plate, the suction valve and the pressure valve to be made of fiber-reinforced plastic.
Durch den zumindest abschnittsweisen Aufbau des Saugventils und/oder des Druckventils aus faserverstärktem Kunststoff, wird die Masse des Saugventils und/oder des Druckventils entsprechend geringer, wodurch der Wirkungsgrad des erfindungsgemäßen Kältemittelverdichters erhöht wird, da das Saugventil und/oder das Druckventil leichter öffenbar ist.Due to the at least partial construction of the suction valve and / or the pressure valve made of fiber-reinforced plastic, the mass of the suction valve and / or the pressure valve is correspondingly lower, which increases the efficiency of the refrigerant compressor according to the invention, since the suction valve and / or the pressure valve is easier to open.
Zusätzlich wird auch das Verhältnis von Masse zu Steifigkeit durch die zumindest abschnittsweise Verwendung eines faserverstärktem Kunststoffs beim Saugventil und/oder beim Druckventil positiv beeinflusst. D.h. verglichen mit dem metallischen Werkstoff weist der faserverstärkte Kunststoff eine deutlich geringere Masse bei gleicher Steifigkeit auf. Dies wirkt sich besonders positiv beim Öffnen und Schließen des Saugventils und des Druckventils aus, da es zu weniger Schwingungen kommt.In addition, the ratio of mass to rigidity is also positively influenced by the use of a fiber-reinforced plastic at least in sections for the suction valve and / or the pressure valve. I.e. compared to the metallic material, the fiber-reinforced plastic has a significantly lower mass with the same rigidity. This has a particularly positive effect when opening and closing the suction valve and the pressure valve, since there are fewer vibrations.
Durch die geringere Masse des Saugventils und/oder des Druckventils bei zumindest abschnittsweiser Verwendung eines faserverstärkten Kunststoffs gestaltet sich bei einer gleichen Aufschlaggeschwindigkeit ein Aufschlag des Saugventils und/oder des Druckventils auf der Saugöffnung bzw. auf der Drucköffnung sanfter, wodurch die Ventilplatte weniger beansprucht wird.Due to the lower mass of the suction valve and / or the pressure valve when a fiber-reinforced plastic is used at least in sections, the suction valve and / or the pressure valve on the suction opening or on the pressure opening becomes smoother at the same opening speed, whereby the valve plate is less stressed.
Wenn das Saugventil und das Druckventil und die Ventilplatte aus faserverstärktem Kunststoff bestehen, dann können diese gemeinsam, d.h. einteilig, beispielsweise durch ein Spritzgussverfahren, hergestellt werden. Dadurch wird eine besonders kostengünstige Herstellung gewährleistet.If the suction valve and the pressure valve and the valve plate consist of fiber-reinforced plastic, then these can be produced together, ie in one piece, for example by an injection molding process. This ensures particularly cost-effective production.
Es wäre weiters vorstellbar, dass auch Teile eines Saugschalldämpfers und/oder eines Druckschalldämpfers aus faserverstärktem Kunststoff bestehen. Diese Teile können dann gemeinsam, d.h. einteilig, beispielsweise mittels Spritzgussverfahrens, mit der Ventilplatte und gegebenenfalls mit dem Saug- bzw. Druckventil hergestellt werden. Daraus resultiert eine geringere Teileanzahl des erfindungsgemäßen Kältemittelverdichters, da weniger Klemm- und Schraubelemente sowie Dichtungen notwendig sind. Weiters entfällt ein anschließender Zusammenbau der Teile. Dadurch ist eine kostengünstige und zeitsparende Herstellung gewährleistet.It would also be conceivable that parts of a suction muffler and / or a pressure muffler also consist of fiber-reinforced plastic. These parts can then be together, i.e. can be produced in one piece, for example by means of injection molding, with the valve plate and optionally with the suction or pressure valve. This results in a lower number of parts of the refrigerant compressor according to the invention, since fewer clamping and screwing elements and seals are necessary. Furthermore, there is no subsequent assembly of the parts. This ensures cost-effective and time-saving production.
Es wäre vorstellbar, dass jene Teile des Saugschalldämpfers und/oder des Druckschalldämpfers, die nicht im Zuge des oben erwähnten Spritzgussverfahrens hergestellt werden können, beispielsweise mittels eines Kunststoffschweißverfahrens oder mittels Kleben mit der Ventilplatte bzw. mit den einteilig hergestellten Teilen verbunden werden.It would be conceivable for those parts of the suction muffler and / or the pressure muffler that cannot be produced in the course of the injection molding process mentioned above to be connected, for example by means of a plastic welding process or by means of adhesive, to the valve plate or to the parts produced in one piece.
Selbstverständlich wäre es allerdings auch möglich, dass sowohl das Saugventil und das Druckventil sowie die Ventilplatte aus faserverstärktem Kunststoff bestehen, jedoch nicht einteilig gefertigt sind. Dann wäre es vorstellbar, dass das Saugventil und das Druckventil mit der Ventilplatte verklemmt oder verschweißt sind.Of course, it would also be possible for both the suction valve and the pressure valve and the valve plate to be made of fiber-reinforced plastic, but not to be made in one piece. Then it would be conceivable that the suction valve and the pressure valve are clamped or welded to the valve plate.
Bei einer bevorzugten Ausführungsvariante des erfindungsgemäßen Kühlmittelverdichters ist vorgesehen, dass das Saugventil und/oder das Druckventil nach den gleichen Verfahren wie die Ventilplatte erhältlich ist.In a preferred embodiment variant of the coolant compressor according to the invention it is provided that the suction valve and / or the pressure valve can be obtained by the same methods as the valve plate.
Somit können das Saugventil und/oder das Druckventil nach den folgenden Verfahren hergestellt sein: Verpressen des Gewebes in dem Presswerkzeug, Umspritzen des Gewebes mit dem thermoplastischen Kunststoff und Verspritzen des thermoplastischen Kunststoffs gemeinsam mit den Glasfasern und/oder Kohlefasern und/oder Aramidfasern.The suction valve and / or the pressure valve can thus be produced according to the following methods: pressing the fabric in the pressing tool, overmolding the fabric with the thermoplastic material and spraying the thermoplastic material together with the glass fibers and / or carbon fibers and / or aramid fibers.
Die Vorteile der Verfahren zur Herstellung des Saugventils und/oder Druckventils sind analog zu dem oben Gesagten über die Verfahren zur Herstellung der Ventilplatte.The advantages of the method for producing the suction valve and / or pressure valve are analogous to what was said above about the method for producing the valve plate.
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.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 inventive concept, but in no way to narrow it down or even reproduce it conclusively.
Dabei zeigt:
- Fig. 1
- eine Schnittansicht eines bekannten Kältemittelverdichters,
- Fig. 2
- eine Aufsicht auf eine aus faserverstärktem Kunststoff hergestellte, rechteckige Ventilplatte mit einem aus faserverstärktem Kunststoff hergestellten Druckventil und einem Druckventilhalter,
- Fig. 3
- eine Aufsicht auf die aus faserverstärktem Kunststoff hergestellte, rechteckige Ventilplatte mit dem aus faserverstärktem Kunststoff hergestellten Druckventil und dem Druckventilhalter sowie mit einem Teil eines aus faserverstärktem Kunststoff hergestellten Saugschalldämpfers,
- Fig. 4
- eine Aufsicht auf ein aus faserverstärktem Kunststoff hergestelltes Saug- oder Druckventil,
- Fig. 5
- eine Schnittansicht des aus faserverstärktem Kunststoff hergestellten Saug- oder Druckventils aus
Fig. 4 gemäß der inFig. 4 eingezeichneten Schnittlinie A-A, - Fig. 6
- eine Aufsicht auf eine aus faserverstärktem Kunststoff hergestellte, runde Ventilplatte mit einem aus faserverstärktem Kunststoff hergestellten Druckventil, und
- Fig. 7
- eine Aufsicht auf die aus faserverstärktem Kunststoff hergestellte, runde Ventilplatte mit dem aus faserverstärktem Kunststoff hergestellten Druckventil sowie mit einem Teil eines aus faserverstärktem Kunststoff hergestellten Saugschalldämpfers und einem Teil eines aus faserverstärktem Kunststoff hergestellten Druckschalldämpfers.
- Fig. 1
- 1 shows a sectional view of a known refrigerant compressor,
- Fig. 2
- a plan view of a rectangular valve plate made of fiber-reinforced plastic with a pressure valve made of fiber-reinforced plastic and a pressure valve holder,
- Fig. 3
- a view of the rectangular valve plate made of fiber-reinforced plastic with the pressure valve made of fiber-reinforced plastic and the pressure valve holder and with a part of a suction silencer made of fiber-reinforced plastic,
- Fig. 4
- a top view of a suction or pressure valve made of fiber-reinforced plastic,
- Fig. 5
- a sectional view of the suction or pressure valve made of fiber-reinforced plastic
Fig. 4 according to the inFig. 4 drawn section line AA, - Fig. 6
- a top view of a round valve plate made of fiber-reinforced plastic with a pressure valve made of fiber-reinforced plastic, and
- Fig. 7
- a top view of the round valve plate made of fiber-reinforced plastic with the pressure valve made of fiber-reinforced plastic and with part of a suction muffler made of fiber-reinforced plastic and part of a pressure muffler made of fiber-reinforced plastic.
Die
Sowohl das Saugventil 9 als auch das Druckventil 10 müssen eine entsprechende Dicke aufweisen, um den Belastungen während des Betriebs des Kältemittelverdichters 1 standzuhalten. Deshalb ist ein nicht vernachlässigbarer Kraft- bzw. Arbeitsaufwand nötig, um das Saugventil 9 und das Druckventil 10 zu öffnen. D.h. das bekannte Saugventil 9 und das bekannte Druckventil 10 führen zu einer Verringerung des Wirkungsgrads des Kältemittelverdichters 1.Both the suction valve 9 and the
Weiters ist die Aufschlaggeschwindigkeit des bekannten Saugventils 9 und des bekannten Druckventils 10 auf eine Saugöffnung 5 und auf eine Drucköffnung 6 begrenzt, da einerseits das Saugventil 9 und das Druckventil 10 bei einer zu hohen Aufschlaggeschwindigkeit Gefahr laufen zerstört zu werden. Andererseits ist es möglich, dass durch eine zu hohe Aufschlaggeschwindigkeit die Saugöffnung 5 und die Drucköffnung 6 durch die Masse des Saugventils 9 und des Druckventils 10 beschädigt werden und nicht mehr dicht sind.Furthermore, the impact speed of the known suction valve 9 and the known
Außerdem kommt es beim Öffnen und Schließen des bekannten Saugventils 9 und Druckventils 10 zu Schwingungen, die zu einer Verringerung des Wirkungsgrades des Kältemittelverdichters führen.In addition, vibrations occur when opening and closing the known suction valve 9 and
Bei der bekannten Ventilplatte 7 wird die Wärme des Kältemittels, das in der Kolben-Zylinder-Einheit 4 zyklisch verdichtet wird, in ein Inneres eines Verdichtergehäuses 15 des Kältemittelverdichters 1 abgegeben.In the known
Daher sind die Ventilplatte 7, das Saugventil 9 und das Druckventil 10 aus faserverstärktem Kunststoff hergestellt.
Durch die einteilige Ausführung entfällt der nach der Fertigung üblicherweise notwendige Zusammenbau der einzelnen Teile.The one-piece design eliminates the need to assemble the individual parts after production.
Weiters ist durch die Verwendung des thermoplastischen Kunststoffs mit dem Gewebe aus Glasfasern die Masse des Bauteils 16 reduziert, weshalb das Druckventil 10 und das Saugventil 9 in einem Betriebszustand des erfindungsgemäßen Kältemittelverdichters 1 leichter öffenbar sind.Furthermore, the mass of the
Ein zusätzlicher Vorteil ist, dass das Bauteil 16 eine schlechtere Wärmeübertragung aufweist, wodurch weniger Wärme des Kältemittels, das in der Kolben-Zylinder-Einheit 4 zyklisch verdichtet wird, in ein Inneres eines Verdichtergehäuses 15 des erfindungsgemäßen Kältemittelverdichters 1 abgegeben wird.An additional advantage is that the
Außerdem wird auch das Verhältnis von Masse zu Steifigkeit durch die Verwendung des thermoplastischen Kunststoffs mit dem Gewebe aus Glasfasern bei dem Bauteil 16 positiv beeinflusst.In addition, the ratio of mass to rigidity is also positively influenced by the use of the thermoplastic with the fabric made of glass fibers in the
Der Druckschalldämpfer ist in
Auf der gegenüberliegenden in der
Es sei erwähnt, dass die Befestigung des Druckventils 10 mit oder ohne Druckventilhalter 17 unabhängig von der Form der Ventilplatte 7 ist. Selbstverständlich könnte auch die runde Ventilplatte 7 aus
Der Aufbau des in
- 11
- KältemittelverdichterRefrigerant compressors
- 22nd
- Elektrische AntriebseinheitElectric drive unit
- 33rd
- ZylindergehäuseCylinder housing
- 44th
- Kolben-Zylinder-EinheitPiston-cylinder unit
- 55
- SaugöffnungSuction opening
- 66
- DrucköffnungPressure opening
- 77
- VentilplatteValve plate
- 88th
- AuswölbungBulge
- 99
- SaugventilSuction valve
- 1010th
- DruckventilPressure valve
- 1111
- BefestigungsabschnittFastening section
- 1212th
- VerschlussabschnittClosure section
- 1313
- ZwischenabschnittIntermediate section
- 1414
- Teil des SaugschalldämpfersPart of the suction muffler
- 1515
- VerdichtergehäuseCompressor housing
- 1616
- BauteilComponent
- 1717th
- DruckventilhalterPressure valve holder
- 1818th
- Teil des DruckschalldämpfersPart of the pressure silencer
Claims (13)
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EP18198062.4A EP3633195A1 (en) | 2018-10-01 | 2018-10-01 | Refrigerant compressor |
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Country | Link |
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EP (1) | EP3633195A1 (en) |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1958390A1 (en) * | 1969-11-21 | 1971-05-27 | Licentia Gmbh | Valve plate for refrigerator compressor |
DE3809837A1 (en) * | 1987-03-27 | 1988-10-20 | Enfo Grundlagen Forschungs Ag | Valve plate, especially a closure or damper plate |
DE4117644A1 (en) * | 1990-06-08 | 1991-12-12 | Brasil Compressores Sa | Flap valve for hermetically sealed compressor - has flexible element mfd. in polyimide resin with reinforcing fibres aligned at least along long axis |
EP1310713A2 (en) * | 2001-11-07 | 2003-05-14 | HOERBIGER KOMPRESSORTECHNIK SERVICES GmbH | Sealing elements for compressor valves |
DE10244566B3 (en) * | 2002-09-25 | 2004-06-24 | Danfoss Compressors Gmbh | Cylinder head device for piston compressor e.g. hermetically-sealed refrigeration compressor, has suction gas channel and pressure space on opposite sides of bridge for pressure valve |
-
2018
- 2018-10-01 EP EP18198062.4A patent/EP3633195A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1958390A1 (en) * | 1969-11-21 | 1971-05-27 | Licentia Gmbh | Valve plate for refrigerator compressor |
DE3809837A1 (en) * | 1987-03-27 | 1988-10-20 | Enfo Grundlagen Forschungs Ag | Valve plate, especially a closure or damper plate |
DE4117644A1 (en) * | 1990-06-08 | 1991-12-12 | Brasil Compressores Sa | Flap valve for hermetically sealed compressor - has flexible element mfd. in polyimide resin with reinforcing fibres aligned at least along long axis |
EP1310713A2 (en) * | 2001-11-07 | 2003-05-14 | HOERBIGER KOMPRESSORTECHNIK SERVICES GmbH | Sealing elements for compressor valves |
DE10244566B3 (en) * | 2002-09-25 | 2004-06-24 | Danfoss Compressors Gmbh | Cylinder head device for piston compressor e.g. hermetically-sealed refrigeration compressor, has suction gas channel and pressure space on opposite sides of bridge for pressure valve |
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