EP1561077B1 - Collecting tank, heat exchanger and refrigerant circuit - Google Patents

Collecting tank, heat exchanger and refrigerant circuit Download PDF

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Publication number
EP1561077B1
EP1561077B1 EP03775215A EP03775215A EP1561077B1 EP 1561077 B1 EP1561077 B1 EP 1561077B1 EP 03775215 A EP03775215 A EP 03775215A EP 03775215 A EP03775215 A EP 03775215A EP 1561077 B1 EP1561077 B1 EP 1561077B1
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EP
European Patent Office
Prior art keywords
collecting tank
stopper
housing
heat exchanger
plug
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03775215A
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German (de)
French (fr)
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EP1561077A1 (en
Inventor
Martin Kaspar
Kurt Molt
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.)
Mahle Behr GmbH and Co KG
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Behr GmbH and Co KG
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Publication date
Application filed by Behr GmbH and Co KG filed Critical Behr GmbH and Co KG
Publication of EP1561077A1 publication Critical patent/EP1561077A1/en
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Anticipated expiration legal-status Critical
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
    • F25B43/006—Accumulators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers
    • F25B2339/044—Condensers with an integrated receiver
    • F25B2339/0441—Condensers with an integrated receiver containing a drier or a filter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/16—Receivers
    • F25B2400/162—Receivers characterised by the plug or stop
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2500/00—Problems to be solved
    • F25B2500/01—Geometry problems, e.g. for reducing size
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00—Evaporators; Condensers
    • F25B39/04—Condensers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2220/00—Closure means, e.g. end caps on header boxes or plugs on conduits

Definitions

  • the invention relates to a collecting container with a plug and a heat exchanger and a refrigerant circuit.
  • Heat exchange media such as in refrigerant circuits of air conditioning systems are often passed through reservoirs, which on the one hand ensures pressure equalization and on the other hand, under certain circumstances, a complete condensation of a refrigerant is ensured.
  • a heat exchange medium in such a collecting container can be freed from particles by means of a filtering device and, if appropriate, by means of a drying device become.
  • Such a collection container is in the DE 100 39 260 A1 the applicant described.
  • the local collecting container receives in its interior a dryer, which is interchangeable for maintenance purposes via a closable with a detachable lid opening.
  • the lid is designed as a cylindrical plug and axially displaceably guided and sealed in a corresponding cylindrical bore of the collecting container.
  • this plug is fixed via a retaining ring, wherein the retaining ring is secured by a voltage applied to the stopper locking block against loosening.
  • the plug is thereby pressed by an applied overpressure, as it exists during operation within the collecting container, axially outwardly against the retaining ring.
  • To open the plug must be pressed from the outside inwards with unpressurized collection container so that the retaining ring is released and can be removed, after which the plug can be removed from the sump.
  • a seal of the bore is done via two sealing rings which are arranged in each case an annular groove of the plug and are pressed by an insertion of the plug into the collecting container in the annular grooves.
  • the outer dimensions of the plug must be matched exactly to the inner dimensions of the bore.
  • the plug must be made of the same material as the sump to avoid a decreasing sealing effect during operation of the sump, since different materials may be subjected to different thermal expansions due to the naturally occurring temperature fluctuations of the heat exchanger medium.
  • the plug is made of aluminum. Thanks to the strength of this material, it is possible to form the plug inside hollow for the purpose of weight and material cost spam without having to accept a reduced shape stability of the plug.
  • the EP 0 886 114 A1 discloses a receptacle for a dryer in which a lid is received in a housing having an inlet and outlet opening.
  • the JP 2002 061 778 A discloses a fluid conduit for a refrigerant that is multi-layered.
  • the US 5992174 discloses a condenser with a refrigerant collector with an insert.
  • a collecting container for a heat exchange medium a housing in which a drying and / or filtering device is receivable.
  • the housing is provided with a closable with a releasable stopper opening through which the drying and / or filtering device in the. Housing can be received and removed from the housing, so that the drying and / or filtration device is designed to be interchangeable.
  • the housing opening is closed with a detachable stopper and can be sealed with a sealant.
  • the sealant may be one or more sealing rings, the / consists of an elastomeric material such as rubber or Teflon / exist.
  • the object of the invention is achieved in that the plug is formed elastically deformable.
  • the plug is deformable by an internal pressure during operation of the collecting container, that the plug presses the sealing means against an edge of the housing opening.
  • an elastically deformable stopper is understood to be a stopper which changes its shape by applying a pressure within the collecting container such that the sealing means experiences a force.
  • a common operating pressure for heat exchange media such as refrigerant from air conditioning systems is already sufficient for this. In this sense, for example, a solid plug made of aluminum has no elastic deformability.
  • the elastic deformability of the plug can be achieved by a suitable geometry of the plug.
  • the plug has a recess with such a thin wall that the wall can be pressed against an edge of the housing opening by means of a pressurized heat exchange medium located within the recess.
  • the stopper is formed substantially as a hollow cylinder with an open end side toward the interior of the housing, wherein the opening has a circular Cross section has.
  • the heat exchange medium then presses the cylinder wall radially in the direction of an edge of the opening, whereby the sealing means, preferably a sealing ring, uniformly compressed and an effective sealing effect is achieved.
  • the collection container constructed when the housing is designed as a tube with an open end.
  • the opening is then formed by the open tube end into which the plug is receivable, is made of plastic, Er.
  • the hollow cylindrical plug is made of plastic, it is particularly well suited as a detachable closure of the collecting container, since a plastic for a deformability according to the invention and at the same time sufficient strength for closing the collecting container is readily selectable.
  • the plug has a shielding element, which is designed as a metal vapor deposition or paint coating, which is applied at least on the inside of the housing facing side of the plug.
  • the plug is integrally formed with the sealant, whereby a mounting cost of the collecting container is reduced due to a resulting reduction in the number of items.
  • the sealing means may be injection molded onto the plug, whereby a particularly simple one-piece design of the plug can be realized with the sealant.
  • the plug is secured against falling out of the sump by being held in the opening by a circlip.
  • a loosening of the retaining ring is prevented from an optionally existing annular groove in the edge of the housing opening by the locking ring is secured by a provided on the stopper, applied to an inner edge of the locking ring locking portion.
  • the collecting container according to the invention is used in a heat exchanger with tubes, fins and two headers such that a heat exchange medium, the through flows through the heat exchanger, before, then or during the flow through the reservoir.
  • the heat exchanger is designed as a condenser, in which case particularly preferably a dryer is accommodated in the sump.
  • Such heat exchangers are through the DE 42 38 853 C2 become known, which hereby expressly belongs to the disclosure content.
  • the collecting container according to the invention is used in a refrigerant circuit of an air conditioner with a compression element, a first heat exchanger, a relaxation element and a second heat exchanger to allow a collection of the refrigerant.
  • the sump contains a dryer for the refrigerant.
  • the compression element is a compressor
  • the first heat exchanger is a condenser
  • the expansion element is an expansion valve
  • the second heat exchanger is an evaporator.
  • FIG. 1 a condenser (1) of an otherwise not shown refrigerant circuit for an air conditioner is shown. It has a tube and fin block (10) with tubes (11) and arranged therebetween ribs (12).
  • a first manifold (13) is provided with an inlet connection (15) for a non-illustrated compression element, such as a compressor, coming gaseous refrigerant and with a drain port (16) for a likewise not shown expansion element, such as an expansion valve, provided flowing liquid refrigerant.
  • the two header pipes (13, 14) are separated by partitions (17, 18, 19, 20, 21, 22, 26, 27) into head pieces (33, 34) communicating with the connections (15, 16) and into intermediate pieces (35, 36, 37, 38, 39, 40, 41, 42) such that the refrigerant from the head piece (33) to the intermediate piece (40) and the intermediate piece (42) to the head piece (34) each have a serpentine path through the condenser (1 ), wherein the flow cross-section with increasing cooling in accordance with the thereby reducing volume of the gaseous and / or liquid Refrigerant is also reduced.
  • the headers (13, 14) are closed by end walls (28, 29, 30, 31) fluid-tight.
  • a collecting container (43) which serves to collect the condensed refrigerant.
  • the housing (23) of the collecting container (43) has an inlet opening (24) and an outlet opening (25), which communicate with the intermediate pieces (40) and (42) of the collecting tube (14).
  • a drying and filtering device (32) which is removable from the housing (23).
  • the tubular housing (23) on one end face with a releasable plug (44) is closed, so that the drying and filtering device (32) via the opening (45) can be exchanged, for example, for maintenance purposes.
  • Fig. 2 shows a more detailed, fragmentary view of a collecting container (100) with a plug (110) in cross section.
  • the collecting container comprises a tubular housing (120), whose one end face (130) is open.
  • the housing (120) has a non-visible inlet opening and an outlet opening (140) for a heat exchange medium such as a refrigerant.
  • a connection to an adjacent manifold (150) having separation and termination walls (160, 170) is provided via an opening (180). formed in the manifold (150), wherein a raised edge (190) of the opening (180) engages in the outlet opening (140) of the collecting container (100).
  • the open end face (130) of the housing (120) with the releasable plug (110) is closed, which is adapted to the housing shape , cylindrical shape.
  • two sealing rings (200, 210) which are received in circumferential annular grooves (220, 230) in the cylinder wall (240) of the hollow cylindrical plug (110).
  • a locking ring (260) is received, which prevents the plug (110) from falling out of the opening (130).
  • the operation of the retaining ring (260) is described in detail in the above-mentioned DE 100 39 260 A1 described, which also hereby expressly belongs to the disclosure content.
  • the removal of the plug (110) from the housing (120) is facilitated by a screw, not shown, which is screwed into the blind hole threaded bore (270), so that the plug (110) can be easily pulled out of the opening (130).
  • the plug (110) is made of an elastically deformable plastic produced, whereby the plug (110) and especially its wall (240) is elastically deformable. It is important to ensure that the deformability of the plug (110) is not so pronounced that the closing action using the retaining ring (260) is at risk.
  • the heat exchange medium within its housing (120) is pressurized and exerts a force on the inside (290) of the wall (240) of the plug from the cavity (280) of the hollow cylindrical plug (110) (110) off. Because of the elastic deformability of the plug material, the wall (240) then bends radially away from the cylinder axis (300) towards the edge of the opening (130), which in this embodiment is represented by the tube wall of the housing (120). Characterized the sealing rings (200, 210) in the annular grooves (220, 230) pressed against the housing (120) and ensures a secure seal.
  • annular grooves (220, 230) are arranged with the sealing rings (200, 210) just in an area of the wall (240) at the level of the cavity (280), so that the generated by the pressure of the heat exchange medium Force on the inside (290) of the wall (240) to a sufficient extent on the sealing rings (200, 210) is transmitted.
  • the plug (110) in the region of the wall (240) is made relatively thin in order to additionally support this power transmission.

Abstract

The condenser (1) for a coolant circuit, for the exchange of heat in an air conditioning installation, has a tube-rib block (10) with ribs (12) between tubes (11). A collector vessel (43) is at the collection tube (14) for the condensed coolant, in a housing (23) together with an exchangeable drying and filter unit (32). The opening (45) in the housing is closed by a removable stopper plug (44) with elastic distortion, together with an sealing ring e.g. of rubber.

Description

Die Erfindung betrifft einen Sammelbehälter mit einem Verschlußstopfen sowie einen Wärmetauscher und einen Kältemittelkreislauf.The invention relates to a collecting container with a plug and a heat exchanger and a refrigerant circuit.

Wärmetauschermedien wie beispielsweise in Kältemittelkreisläufen von Klimaanlagen werden häufig durch Sammelbehälter geleitet, wodurch einerseits ein Druckausgleich gewährleistet und andererseits unter Umständen eine vollständige Kondensation eines Kältemittels sichergestellt ist. Darüberhinaus kann ein Wärmetauschermedium in einem solchen Sammelbehälter mittels einer Filtriervorrichtung von Partikeln und gegebenenfalls mittels einer Trocknungsvorrichtung von Wasser befreit werden. Um eine solche Filtrier- und/oder Trocknungsvorrichtung für Wartungszwecke austauschbar zu gestalten, ist es notwendig, den Sammelbehälter mit einer reversibel verschließbaren Öffnung zu versehen, durch die die Filtrier- und/oder Trocknungsvorrichtung aus dem Sammelbehälter herausnehmbar ist.Heat exchange media such as in refrigerant circuits of air conditioning systems are often passed through reservoirs, which on the one hand ensures pressure equalization and on the other hand, under certain circumstances, a complete condensation of a refrigerant is ensured. Moreover, a heat exchange medium in such a collecting container can be freed from particles by means of a filtering device and, if appropriate, by means of a drying device become. In order to make such a filtering and / or drying device interchangeable for maintenance purposes, it is necessary to provide the collecting container with a reversibly closable opening through which the filtering and / or drying device is removable from the collecting container.

Ein derartiger Sammelbehälter ist in der DE 100 39 260 A1 der Anmelderin beschrieben. Der dortige Sammelbehälter nimmt in seinem Inneren einen Trockner auf, der zu Wartungszwecken über eine mit einem lösbaren Deckel verschließbare Öffnung austauschbar ist. Der Deckel ist dabei als zylindrischer Stopfen ausgebildet und in einer korrespondierenden zylindrischen Bohrung des Sammelbehälters axial verschiebbar geführt und abgedichtet. Außerdem ist dieser Stopfen über einen Sicherungsring festgelegt, wobei der Sicherungsring durch einen am Stopfen anliegenden Sperrabsatz gegen Lösen gesichert ist. Der Stopfen wird dabei durch einen anliegenden Überdruck, wie er während eines Betriebes innerhalb des Sammelbehälters vorliegt, axial nach außen gegen den Sicherungsring gedrückt. Zum Öffnen muß der Stopfen bei drucklosem Sammelbehälter von außen nach innen gedrückt werden, so daß der Sicherungsring freigegeben wird und entfernt werden kann, wonach auch der Stopfen aus dem Sammelbehälter entfernt werden kann.Such a collection container is in the DE 100 39 260 A1 the applicant described. The local collecting container receives in its interior a dryer, which is interchangeable for maintenance purposes via a closable with a detachable lid opening. The lid is designed as a cylindrical plug and axially displaceably guided and sealed in a corresponding cylindrical bore of the collecting container. In addition, this plug is fixed via a retaining ring, wherein the retaining ring is secured by a voltage applied to the stopper locking block against loosening. The plug is thereby pressed by an applied overpressure, as it exists during operation within the collecting container, axially outwardly against the retaining ring. To open the plug must be pressed from the outside inwards with unpressurized collection container so that the retaining ring is released and can be removed, after which the plug can be removed from the sump.

Eine Abdichtung der Bohrung geschieht über zwei Dichtungsringe, die in jeweils einer Ringnut des Stopfens angeordnet sind und durch ein Einführen des Stopfens in den Sammelbehälter in die Ringnuten gedrückt werden. Um eine ausreichende Dichtwirkung zu erhalten, müssen einerseits die Außenabmessungen des Stopfens genau auf die Innenabmessungen der Bohrung abgestimmt sein. Andererseits muß der Stopfen aus dem gleichen Material bestehen wie der Sammelbehälter, um eine nachlassende Dichtwirkung während eines Betriebes des Sammelbehälters zu vermeiden, da wegen der dabei naturgemäß auftretenden Temperaturschwankungen des Wärmetauschermediums verschiedene Materialien gegebenenfalls verschiedenen thermischen Ausdehnungen unterworfen sind. Diese Einschränkungen sowohl hinsichtlich der Form als auch hinsichtlich des Materials des Stopfens wirken sich nachteillg auf die Herstellung eines solchen Sammelbehälters aus.A seal of the bore is done via two sealing rings which are arranged in each case an annular groove of the plug and are pressed by an insertion of the plug into the collecting container in the annular grooves. In order to obtain a sufficient sealing effect, on the one hand the outer dimensions of the plug must be matched exactly to the inner dimensions of the bore. On the other hand, the plug must be made of the same material as the sump to avoid a decreasing sealing effect during operation of the sump, since different materials may be subjected to different thermal expansions due to the naturally occurring temperature fluctuations of the heat exchanger medium. These limitations, both as regards the shape and the material of the plug, have an adverse effect on the manufacture of such a collection container.

Da der vorbekannte Sammelbehälter aus Aluminium besteht, ist auch der Stopfen aus Aluminium gefertigt. Dank der Festigkeit dieses Materials ist es möglich, den Stopfen zwecks einer Gewichts- und Materialkostenerspamis innen hohl auszubilden, ohne eine verringerte Formstabilität des Stopfens in Kauf nehmen zu müssen.Since the prior art collection tank is made of aluminum, the plug is made of aluminum. Thanks to the strength of this material, it is possible to form the plug inside hollow for the purpose of weight and material cost spam without having to accept a reduced shape stability of the plug.

Die EP 0 886 114 A1 offenbart einen Aufnahmebehälter für einen Trockner, bei welchem ein Deckel in ein Gehäuse aufgenommen ist, der eine Einlass- und Auslassöffnung aufweist.The EP 0 886 114 A1 discloses a receptacle for a dryer in which a lid is received in a housing having an inlet and outlet opening.

Die JP 2002 061 778 A offenbart eine Fluidleitung für ein Kältemittel, das mehrlagig ausgebildet Ist.The JP 2002 061 778 A discloses a fluid conduit for a refrigerant that is multi-layered.

Die US 5992174 offenbart einen Kondensator mit einem Kältemittelsammler mit einem Einsatz.The US 5992174 discloses a condenser with a refrigerant collector with an insert.

Es ist Aufgabe der vorliegenden Erfindung, einen Sammelbehälter, einen Wärmetauscher und/oder einen Kältemittelkreislauf bereitzustellen, bei dem eine vereinfachte und/oder kostengünstige Herstellung und gegebenenfalls eine verbesserte Dichtwirkung realisierbar ist.It is an object of the present invention to provide a collecting container, a heat exchanger and / or a refrigerant circuit, in which a simplified and / or cost-effective production and optionally an improved sealing effect can be realized.

Diese Aufgabe wird durch einen Sammelbehälter mit den Merkmalen des Anspruchs 1, durch einen Wärmetauscher mit den Merkmalen des Anspruchs 6 sowie durch einen Kältemittelkreislauf mit den Merkmalen des Anspruchs 7 gelöst.This object is achieved by a collecting container having the features of claim 1, by a heat exchanger having the features of claim 6 and by a refrigerant circuit having the features of claim 7.

Gemäß Anspruch 1 umfaßt ein Sammelbehälter für ein Wärmetauschermedium ein Gehäuse, in dem eine Trocknungs- und/oder Filtriervorrichtung aufnehmbar ist. Das Gehäuse ist mit einer mit einem lösbaren Stopfen verschließbaren Öffnung versehen, durch die hindurch die Trocknungs- und/oder Filtriervorrichtung in das. Gehäuse aufnehmbar und aus dem Gehäuse herausnehmbar ist, so daß die Trocknungs- und/oder Filtriervorrichtung austauschbar gestaltet ist. Die Gehäuseöffnung ist dazu mit einem lösbaren Stopfen verschließbar und mit einem Dichtmittel abdichtbar. Das Dichtmittel kann dabei ein oder mehrere Dichtringe sein, der/die aus einem elastomeren Material wie Gummi oder Teflon besteht/bestehen.According to claim 1 comprises a collecting container for a heat exchange medium, a housing in which a drying and / or filtering device is receivable. The housing is provided with a closable with a releasable stopper opening through which the drying and / or filtering device in the. Housing can be received and removed from the housing, so that the drying and / or filtration device is designed to be interchangeable. The housing opening is closed with a detachable stopper and can be sealed with a sealant. The sealant may be one or more sealing rings, the / consists of an elastomeric material such as rubber or Teflon / exist.

Die Aufgabe der Erfindung wird dadurch gelöst, daß der Stopfen elastisch verformbar ausgebildet ist. Dadurch ist der Stopfen während eines Betriebes des Sammelbehälters durch einen Innendruck derart verformbar, daß der Stopfen das Dichtmittel gegen einen Rand der Gehäuseöffnung drückt. Damit ist eine gewünschte Abdichtung selbst dann sichergestellt, wenn der Stopfen alleine durch seine Abmessungen keine ausreichende Pressung auf das Dichtmittel ausüben würde, was beispielsweise durch ein ungenaues Fertigungsmaß oder auch durch unterschiedlich große thermische Ausdehnung von Stopfen und Gehäuse der Fall sein kann.The object of the invention is achieved in that the plug is formed elastically deformable. As a result, the plug is deformable by an internal pressure during operation of the collecting container, that the plug presses the sealing means against an edge of the housing opening. Thus, a desired seal is ensured even if the plug alone would not exert sufficient pressure on the sealant by its dimensions, which may be the case for example by an inaccurate manufacturing dimension or by different thermal expansion of plug and housing.

Unter einem elastisch verformbaren Stopfen ist im Sinne der Erfindung ein Stopfen zu verstehen, der durch ein Anlegen eines Druckes innerhalb des Sammelbehälters seine Form derart ändert, daß das Dichtmittel eine Kraft erfährt. Ein gebräuchlicher Betriebsdruck für Wärmetauschermedien wie beispielsweise Kältemittel von Klimaanlagen reicht dafür bereits aus. In diesem Sinne besitzt beispielsweise ein massiver Stopfen aus Aluminium keine elastische Verformbarkeit.In the context of the invention, an elastically deformable stopper is understood to be a stopper which changes its shape by applying a pressure within the collecting container such that the sealing means experiences a force. A common operating pressure for heat exchange media such as refrigerant from air conditioning systems is already sufficient for this. In this sense, for example, a solid plug made of aluminum has no elastic deformability.

Die elastische Verformbarkeit des Stopfens ist durch eine geeignete Geometrie des Stopfens erreichbar. Der Stopfen weist eine Aussparung mit einer derart dünnen Wandung auf, daß die Wandung mit Hilfe eines unter Druck stehenden Wärmetauschermediums, das sich innerhalb der Aussparung befindet, gegen einen Rand der Gehäuseöffnung preßbar ist. Hierzu ist der Stopfen im wesentlichen als Hohlzylinder mit einer offenen Stirnseite zum Gehäuseinneren hin ausgebildet, wobei die Öffnung einen kreisrunden Querschnitt aufweist. Das Wärmetauschermedium drückt dann die Zylinderwand radial in Richtung eines Randes der Öffnung, wodurch das Dichtmittel, vorzugsweise ein Dichtungsring, gleichmäßig zusammengepreßt und eine effektive Dichtwirkung erreicht wird. Besonders einfach ist der Sammelbehälter aufgebaut, wenn das Gehäuse als Rohr mit einem offenen Ende ausgebildet ist. Die Öffnung wird dann durch das offene Rohrende, in das der Stopfen aufnehmbar ist, gebildet besteht aus Kunststoff, Er.The elastic deformability of the plug can be achieved by a suitable geometry of the plug. The plug has a recess with such a thin wall that the wall can be pressed against an edge of the housing opening by means of a pressurized heat exchange medium located within the recess. For this purpose, the stopper is formed substantially as a hollow cylinder with an open end side toward the interior of the housing, wherein the opening has a circular Cross section has. The heat exchange medium then presses the cylinder wall radially in the direction of an edge of the opening, whereby the sealing means, preferably a sealing ring, uniformly compressed and an effective sealing effect is achieved. Particularly simple is the collection container constructed when the housing is designed as a tube with an open end. The opening is then formed by the open tube end into which the plug is receivable, is made of plastic, Er.

Der hohlzylinderförmige Stopfen besteht aus Kunststoff, Er eignet sich besonders gut als lösbarer Verschluß des Sammelbehälters, da ein Kunststoff für eine erfindungsgemäße Verformbarkeit und gleichzeitig ausreichender Festigkeit zum Verschließen des Sammelbehälters ohne weiteres wählbar ist. Um eine Permeation des Wärmetauschermediums durch den Stopfenwerkstoff zu verhindern, weist der Stopfen ein Abschirmelement auf, das als Metallbedampfung oder Lackbeschichtung ausgebildet ist, die zumindest auf der dem Gehäuseinneren zugewandten Seite des Stopfens aufgebracht ist.The hollow cylindrical plug is made of plastic, it is particularly well suited as a detachable closure of the collecting container, since a plastic for a deformability according to the invention and at the same time sufficient strength for closing the collecting container is readily selectable. In order to prevent permeation of the heat exchange medium through the plug material, the plug has a shielding element, which is designed as a metal vapor deposition or paint coating, which is applied at least on the inside of the housing facing side of the plug.

Der Stopfen ist einstückig mit dem Dichtmittel ausgebildet, wodurch aufgrund einer resultierenden Verringerung der Anzahl von Einzelteilen ein Montageaufwand des Sammelbehälters reduziert wird. Insbesondere kann das Dichtmittel an den Stopfen angespritzt sein, womit sich eine besonders einfache einstückige Ausbildung des Stopfens mit dem Dichtmittel realisieren läßt.The plug is integrally formed with the sealant, whereby a mounting cost of the collecting container is reduced due to a resulting reduction in the number of items. In particular, the sealing means may be injection molded onto the plug, whereby a particularly simple one-piece design of the plug can be realized with the sealant.

Der Stopfen ist gegen ein Herausfallen aus dem Sammelbehälter gesichert, indem er von einem Sicherungsring in der Öffnung haltbar ist. Insbesondere wird ein Lösen des Sicherungsringes aus einer gegebenenfalls vorhandenen Ringnut im Rand der Gehäuseöffnung verhindert, indem der Sicherungsring durch einen am Stopfen vorgesehenen, an einem Innenrand des Sicherungsringes anliegenden Sperrabsatz gesichert ist.The plug is secured against falling out of the sump by being held in the opening by a circlip. In particular, a loosening of the retaining ring is prevented from an optionally existing annular groove in the edge of the housing opening by the locking ring is secured by a provided on the stopper, applied to an inner edge of the locking ring locking portion.

In einer vorteilhaften Ausführung wird der erfindungsgemäße Sammelbehälter in einen Wärmetauscher mit Rohren, Rippen und zwei Kopfstücken derart eingesetzt, daß ein Wärmetauschermedium, das durch den Wärmetauscher strömt, zuvor, anschließend oder währenddessen den Sammelbehälter durchströmt. Insbesondere ist dabei der Wärmetauscher als Kondensator ausgebildet, wobei dann besonders bevorzugt ein Trockner in den Sammelbehälter aufgenommen ist..Solche Wärmetauscher sind durch die DE 42 38 853 C2 bekannt geworden, welche hiermit ausdrücklich zum Offenbarungsinhalt gehört.In an advantageous embodiment of the collecting container according to the invention is used in a heat exchanger with tubes, fins and two headers such that a heat exchange medium, the through flows through the heat exchanger, before, then or during the flow through the reservoir. In particular, while the heat exchanger is designed as a condenser, in which case particularly preferably a dryer is accommodated in the sump. Such heat exchangers are through the DE 42 38 853 C2 become known, which hereby expressly belongs to the disclosure content.

Gemäß einer weiteren vorteilhaften Ausführung wird der erfindungsgemäße Sammelbehälter in einen Kältemittelkreislauf einer Klimaanlage mit einem Verdichtungselement, einem ersten Wärmetauscher, einem Entspannungselement und einem zweiten Wärmetauscher eingesetzt, um eine Sammlung des Kältemittels zu ermöglichen. Der Sammelbehälter beinhaltet dabei einen Trockner für das Kältemittel. Insbesondere ist dabei das Verdichtungselement ein Kompressor, der erste Wärmetauscher ein Kondensator, das Entspannungselement ein Expansionsventil und der zweite Wärmetauscher ein Verdampfer.According to a further advantageous embodiment of the collecting container according to the invention is used in a refrigerant circuit of an air conditioner with a compression element, a first heat exchanger, a relaxation element and a second heat exchanger to allow a collection of the refrigerant. The sump contains a dryer for the refrigerant. In particular, the compression element is a compressor, the first heat exchanger is a condenser, the expansion element is an expansion valve and the second heat exchanger is an evaporator.

Die .Erfindung wird nachfolgend anhand von Ausführungsbeispielen unter Bezugnahme auf die Zeichnungen näher erläutert. Es zeigen:

Fig. 1
einen Wärmetauscher mit einem erfindungsgemäßen Sammelbehälter und
Fig. 2
einen Ausschnitt aus einem Sammelbehälter im Querschnitt.
The invention will be explained in more detail below with reference to exemplary embodiments with reference to the drawings. Show it:
Fig. 1
a heat exchanger with a collecting container according to the invention and
Fig. 2
a section of a collecting container in cross section.

In Figur 1 ist ein Kondensator (1) eines ansonsten nicht gezeigten Kältemittelkreislaufs für eine Klimaanlage dargestellt. Er besitzt einen Rohr-Rippen-Block (10) mit Rohren (11) und dazwischen angeordneten Rippen (12). Die Rohre (11), die bei diesem Ausführungsbeispiel als Flachrohre ausgebildet sind, münden in Sammelrohren (13, 14), die sich beidseits über die gesamte Höhe des Rohr-Rippen-Blocks (10) erstrecken. Ein erstes Sammelrohr (13) ist mit einem Zulaufanschluß (15) für von einem nicht dargestellten Verdichtungselement, wie zum Beispiel einem Kompressor, kommendes gasförmiges Kältemittel und mit einem Ablaufanschluß (16) für zu einem ebenfalls nicht dargestellten Entspannungselement, wie zum Beispiel einem Expansionsventil, fließendes flüssiges Kältemittel versehen.In FIG. 1 a condenser (1) of an otherwise not shown refrigerant circuit for an air conditioner is shown. It has a tube and fin block (10) with tubes (11) and arranged therebetween ribs (12). The tubes (11), which are formed in this embodiment as flat tubes, open into headers (13, 14) extending on both sides over the entire height of the tube-fin block (10). A first manifold (13) is provided with an inlet connection (15) for a non-illustrated compression element, such as a compressor, coming gaseous refrigerant and with a drain port (16) for a likewise not shown expansion element, such as an expansion valve, provided flowing liquid refrigerant.

Die beiden Sammelrohre (13, 14) sind durch Trennwände (17, 18, 19, 20, 21, 22, 26, 27) in mit den Anschlüssen (15, 16) kommunizierende Kopfstücke (33, 34) und in Zwischenstücke (35, 36, 37, 38, 39, 40, 41, 42) derart unterteilt, daß das Kältemittel vom Kopfstück (33) zum Zwischenstück (40) und vom Zwischenstück (42) zum Kopfstück (34) jeweils einen serpentinenartigen Weg durch den Kondensator (1) beschreibt, wobei der Strömungsquerschnitt mit zunehmender Abkühlung entsprechend dem sich dabei verringernden Volumen des gasförmigen und/oder flüssigen Kältemittels ebenfalls verringert wird. Die Sammelrohre (13, 14) sind durch Abschlußwände (28, 29, 30, 31) fluiddicht verschlossen.The two header pipes (13, 14) are separated by partitions (17, 18, 19, 20, 21, 22, 26, 27) into head pieces (33, 34) communicating with the connections (15, 16) and into intermediate pieces (35, 36, 37, 38, 39, 40, 41, 42) such that the refrigerant from the head piece (33) to the intermediate piece (40) and the intermediate piece (42) to the head piece (34) each have a serpentine path through the condenser (1 ), wherein the flow cross-section with increasing cooling in accordance with the thereby reducing volume of the gaseous and / or liquid Refrigerant is also reduced. The headers (13, 14) are closed by end walls (28, 29, 30, 31) fluid-tight.

An das Sammelrohr (14) ist ein Sammelbehälter (43) angeschlossen, der der Sammlung des kondensierten Kältemittels dient. Das Gehäuse (23) des Sammelbehälters (43) weist eine Eintrittsöffnung (24) und eine Austrittsöffnung (25) auf, die mit den Zwischenstücken (40) beziehungsweise (42) des Sammelrohrs (14) kommunizieren. Innerhalb des Gehäuses (23) befindet sich eine Trocknungs- und Filtriervorrichtung (32), die aus dem Gehäuse (23) herausnehmbar ist. Zu diesem Zweck ist das rohrförmige Gehäuse (23) auf einer Stirnseite mit einem lösbaren Stopfen (44) verschlossen, so daß die Trocknungs- und Filtriervorrichtung (32) über die Öffnung (45) beispielsweise zu Wartungszwecken ausgetauscht werden kann.To the collecting pipe (14) a collecting container (43) is connected, which serves to collect the condensed refrigerant. The housing (23) of the collecting container (43) has an inlet opening (24) and an outlet opening (25), which communicate with the intermediate pieces (40) and (42) of the collecting tube (14). Within the housing (23) is a drying and filtering device (32) which is removable from the housing (23). For this purpose, the tubular housing (23) on one end face with a releasable plug (44) is closed, so that the drying and filtering device (32) via the opening (45) can be exchanged, for example, for maintenance purposes.

Fig. 2 zeigt eine detailliertere, ausschnittsweise Ansicht eines Sammelbehälters (100) mit einem Stopfen (110) im Querschnitt. Der Sammelbehälter umfaßt ein rundrohrförmiges Gehäuse (120), dessen eine Stirnseite (130) offen ist. Das Gehäuse (120) weist eine nicht sichtbare Eintrittsöffnung und eine Austrittsöffnung (140) für ein Wärmetauschermedium wie beispielsweise ein Kältemittel auf. Eine Verbindung zu einem angrenzenden Sammelrohr (150) mit Trennbeziehungsweise Abschlußwänden (160, 170) wird über eine Öffnung (180) in dem Sammelrohr (150) hergestellt, wobei ein hochgestellter Rand (190) der Öffnung (180) in die Austrittsöffnung (140) des Sammelbehälters (100) eingreift. Fig. 2 shows a more detailed, fragmentary view of a collecting container (100) with a plug (110) in cross section. The collecting container comprises a tubular housing (120), whose one end face (130) is open. The housing (120) has a non-visible inlet opening and an outlet opening (140) for a heat exchange medium such as a refrigerant. A connection to an adjacent manifold (150) having separation and termination walls (160, 170) is provided via an opening (180). formed in the manifold (150), wherein a raised edge (190) of the opening (180) engages in the outlet opening (140) of the collecting container (100).

Um eine nicht gezeigte Trocknungs- und Filtriervorrichtung, die in das Gehäuse (120) aufnehmbar ist, austauschen zu können, ist die offene Stirnseite (130) des Gehäuses (120) mit dem lösbaren Stopfen (110) verschlossen, der eine an die Gehäuseform angepaßte, zylindrische Form besitzt. Zur Abdichtung dienen zwei Dichtungsringe (200, 210), die in umlaufende Ringnuten (220, 230) in der Zylinderwandung (240) des hohlzylindrischen Stopfens (110) aufgenommen sind. In eine Ringnut (250) im Rand der Öffnung (130) ist ein Sicherungsring (260) aufgenommen, der den Stopfen (110) an einem Herausfallen aus der Öffnung (130) hindert. Die Funktionsweise des Sicherungsringes (260) ist ausführlich in der eingangs erwähnten DE 100 39 260 A1 beschrieben, welche hiermit ebenfalls ausdrücklich zum Offenbarungsinhalt gehört. Das Herausnehmen des Stopfens (110) aus dem Gehäuse (120) wird durch eine nicht gezeigte Schraube erleichtert, die in die sacklochartige Gewindebohrung (270) eindrehbar ist, so daß der Stopfen (110) einfach aus der Öffnung (130) herausgezogen werden kann.In order to replace a drying and filtering device, not shown, which is in the housing (120) to be able to exchange, the open end face (130) of the housing (120) with the releasable plug (110) is closed, which is adapted to the housing shape , cylindrical shape. For sealing serve two sealing rings (200, 210) which are received in circumferential annular grooves (220, 230) in the cylinder wall (240) of the hollow cylindrical plug (110). In an annular groove (250) in the edge of the opening (130) a locking ring (260) is received, which prevents the plug (110) from falling out of the opening (130). The operation of the retaining ring (260) is described in detail in the above-mentioned DE 100 39 260 A1 described, which also hereby expressly belongs to the disclosure content. The removal of the plug (110) from the housing (120) is facilitated by a screw, not shown, which is screwed into the blind hole threaded bore (270), so that the plug (110) can be easily pulled out of the opening (130).

Um eine verbesserte Dichtwirkung der Dichtungsringe (200, 210) zu erreichen, ist der Stopfen (110) aus einem elastisch verformbaren Kunststoff hergestellt, wodurch der Stopfen (110) sowie besonders dessen Wandung (240) elastisch verformbar ist. Es ist darauf zu achten, daß die Verformbarkeit des Stopfens (110) nicht so stark ausgeprägt ist, daß die Schließwirkung mit Hilfe des Sicherungsringes (260) gefährdet ist.In order to achieve an improved sealing effect of the sealing rings (200, 210), the plug (110) is made of an elastically deformable plastic produced, whereby the plug (110) and especially its wall (240) is elastically deformable. It is important to ensure that the deformability of the plug (110) is not so pronounced that the closing action using the retaining ring (260) is at risk.

Während eines Betriebes des Sammelbehälters (100) steht das innerhalb dessen Gehäuses (120) befindliche Wärmetauschermedium unter Druck und übt von dem Hohlraum (280) des hohlzylindischen Stopfens (110) aus eine Kraft auf die Innenseite (290) der Wandung (240) des Stopfens (110) aus. Wegen der elastischen Verformbarkeit des Stopfenmaterials biegt sich dann die Wandung (240) radial von der Zylinderachse (300) weg in Richtung auf den Rand der Öffnung (130), der bei diesem Ausführungsbeispiel durch die Rohrwandung des Gehäuses (120) dargestellt ist. Dadurch werden die Dichtringe (200, 210) in den Ringnuten (220, 230) gegen das Gehäuse (120) gepreßt und eine sichere Abdichtung gewährleistet. Von wesentlicher Bedeutung ist dabei, daß die Ringnuten (220, 230) mit den Dichtringen (200, 210) gerade in einem Bereich der Wandung (240) auf Höhe des Hohlraums (280) angeordnet sind, so daß die durch den Druck des Wärmetauschermediums erzeugte Kraft auf die Innenseite (290) der Wandung (240) in ausreichendem Maße auf die Dichtringe (200, 210) übertragen wird. Im Gegensatz zu einem Deckelbereich (310) des Hohlzylinders ist der Stopfen (110) im Bereich der Wandung (240) relativ dünn ausgebildet, um diese Kraftübertragung zusätzlich zu unterstützen. Auch wenn unter Umständen die Wandung (240) bereits ohne Innendruck an der Innenseite des Gehäuses (120) anliegt, ist bei vorhandenem Überdruck eine verstärkte Pressung der Dichtringe (200, 210) gegeben, da aufgrund der elastischen Verformbarkeit des Materials die Stopfenwandung (240) die oben genannte Kraft nicht oder nur teilweise aufnehmen kann, so daß die Kraft mittelbar auf die Dichtringe wirkt. Also ist auch unter diesen Umständen eine verbesserte Dichtwirkung möglich.During operation of the sump (100), the heat exchange medium within its housing (120) is pressurized and exerts a force on the inside (290) of the wall (240) of the plug from the cavity (280) of the hollow cylindrical plug (110) (110) off. Because of the elastic deformability of the plug material, the wall (240) then bends radially away from the cylinder axis (300) towards the edge of the opening (130), which in this embodiment is represented by the tube wall of the housing (120). Characterized the sealing rings (200, 210) in the annular grooves (220, 230) pressed against the housing (120) and ensures a secure seal. It is essential that the annular grooves (220, 230) are arranged with the sealing rings (200, 210) just in an area of the wall (240) at the level of the cavity (280), so that the generated by the pressure of the heat exchange medium Force on the inside (290) of the wall (240) to a sufficient extent on the sealing rings (200, 210) is transmitted. In contrast to a cover area (310) of the hollow cylinder, the plug (110) in the region of the wall (240) is made relatively thin in order to additionally support this power transmission. Even if, under certain circumstances, the wall (240) already rests against the inside of the housing (120) without internal pressure, an increased pressure of the sealing rings (200, 210) is given in the presence of overpressure, since due to the elastic deformability of the material, the plug wall (240) can not or only partially absorb the above-mentioned force, so that the force acts indirectly on the sealing rings. So even under these circumstances, an improved sealing effect is possible.

Insgesamt sind so größere Fertigungstoleranzen bei den Abmessungen des Gehäuses (120) und des Stopfens (110) ebenso hinnehmbar wie relative Größenveränderungen zwischen Gehäuse (120) und Stopfen (110) während eines Betriebes des Sammelbehälters (100) aufgrund von verschieden großen thermischen Ausdehnungen, die gegebenenfalls durch Temperaturschwankungen des Wärmetauschermediums ausgelöst werden.Overall, so larger manufacturing tolerances in the dimensions of the housing (120) and the plug (110) are just as acceptable as relative size changes between the housing (120) and plug (110) during operation of the collecting container (100) due to different thermal expansion, the optionally triggered by temperature fluctuations of the heat exchanger medium.

Claims (7)

  1. A collecting tank for a heat exchanger medium, comprising a housing (23, 120) of a replaceable drying and/or filtering device (32), a removable stopper (44, 110), and at least one sealing ring (200, 210) made of an elastomeric material, the replaceable drying and/or filtering device (32) being receivable in the housing (23, 120), the housing (23, 120) comprising an opening (45, 130) that can be closed with the removable stopper (44, 110) and sealed with the sealing ring (200, 210), the stopper (44, 110) being guided axially displaceably in the cylindrical bore hole of the collecting tank and fixed by means of a retaining ring (260), and the stopper (44, 110) being made of plastic, characterized in that, during operation of the collecting tank, the stopper (44, 110) can be elastically deformed by an inner pressure such that the stopper (44, 110) presses the sealing ring (200, 210) against an edge of the housing opening (45, 130), and the stopper (44, 110) is substantially configured as a hollow cylinder having an open end face (280) and a recess, wherein the hollow cylinder is open on the side facing the housing interior, the stopper (44, 110) comprises a shielding element against the heat exchanger medium, and the shielding element is designed as a coating, wherein the elastomeric element of the sealing ring (200, 210) comprises rubber or Teflon, and the stopper (44, 110) is designed integral with the sealing ring (220, 210), wherein the sealing ring (200, 210) is in particular molded to the stopper (44, 110).
  2. The collecting tank according to claim 1, characterized in that the coating is designed as a metal or paint coating.
  3. A collecting tank according to any one of claims 1 to 2, characterized in that the opening (280) has a circular cross-section.
  4. A collecting tank according to any one of claims 1 to 3, characterized in that the housing (23, 120) is configured as a tube having an open end (45, 130), wherein the open tube end (45, 130) can receive the stopper (44, 110).
  5. A collecting tank according to any one of claims 1 to 4, characterized in that the heat exchanger medium is a refrigerant and the collecting tank is part of a refrigerant circuit, in particular for a motor vehicle air-conditioning system.
  6. A heat exchanger, in particular a condenser (1), comprising tubes (11), ribs (12), and two head pieces (33, 34), characterized in that the heat exchanger comprises a collecting tank according to any one of claims 1 to 5.
  7. A coolant circuit of an air-conditioning system, in particular for a motor vehicle, comprising a compression element having a first heat exchanger, an expansion element having a second heat exchanger, and a collecting tank, characterized in that the collecting tank is designed according to any one of claims 1 to 5.
EP03775215A 2002-11-05 2003-10-22 Collecting tank, heat exchanger and refrigerant circuit Expired - Lifetime EP1561077B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10251777 2002-11-05
DE10251777A DE10251777A1 (en) 2002-11-05 2002-11-05 Condenser for a coolant circuit, in the heat exchanger for an air conditioner, has a collector vessel with a filter/drying unit in a housing accessed through an opening closed by a flexible stopper and ring seal
PCT/EP2003/011692 WO2004042292A1 (en) 2002-11-05 2003-10-22 Collecting tank, heat exchanger and coolant circuit

Publications (2)

Publication Number Publication Date
EP1561077A1 EP1561077A1 (en) 2005-08-10
EP1561077B1 true EP1561077B1 (en) 2011-04-27

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US (1) US20060123836A1 (en)
EP (1) EP1561077B1 (en)
CN (1) CN1711450A (en)
AT (1) ATE507443T1 (en)
AU (1) AU2003283290A1 (en)
BR (1) BR0315982A (en)
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WO (1) WO2004042292A1 (en)

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US11712942B2 (en) * 2020-08-05 2023-08-01 Denso International America, Inc. Hermetically sealed cap for heat exchanger modulator
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BR0315982A (en) 2005-09-20
DE50313654D1 (en) 2011-06-09
AU2003283290A1 (en) 2004-06-07
WO2004042292A1 (en) 2004-05-21
DE10251777A1 (en) 2004-05-19
ATE507443T1 (en) 2011-05-15
EP1561077A1 (en) 2005-08-10
US20060123836A1 (en) 2006-06-15
CN1711450A (en) 2005-12-21

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