EP1745255B1 - Condenser for an air-conditioning system, particularly for a motor vehicle - Google Patents

Condenser for an air-conditioning system, particularly for a motor vehicle Download PDF

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Publication number
EP1745255B1
EP1745255B1 EP05747670A EP05747670A EP1745255B1 EP 1745255 B1 EP1745255 B1 EP 1745255B1 EP 05747670 A EP05747670 A EP 05747670A EP 05747670 A EP05747670 A EP 05747670A EP 1745255 B1 EP1745255 B1 EP 1745255B1
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EP
European Patent Office
Prior art keywords
condenser
manifold
pipe
stopper
collector
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.)
Not-in-force
Application number
EP05747670A
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German (de)
French (fr)
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EP1745255A1 (en
Inventor
Georg Feldhaus
Uwe FÖRSTER
Martin Kaspar
Kurt Molt
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Mahle Behr GmbH and Co KG
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Behr GmbH and Co KG
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Publication of EP1745255A1 publication Critical patent/EP1745255A1/en
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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
    • F25B39/00—Evaporators; Condensers
    • F25B39/04—Condensers
    • 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
    • F25B43/003—Filters
    • 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
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers
    • F25B2339/044—Condensers with an integrated receiver
    • F25B2339/0443—Condensers with an integrated receiver the receiver being positioned horizontally
    • 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

Definitions

  • the invention relates to a condenser for an air conditioning system, in particular for a motor vehicle.
  • a capacitor according to the preamble of claim 1 is eg in JP-A-11304301 shown.
  • Capacitors are components of a refrigerant circuit for an air conditioner, wherein the condenser in automotive air conditioners is often arranged and fixed in the front of the engine compartment together with a coolant radiator. Capacitors are known as so-called cross-flow condensers, ie with horizontally arranged and flowed through the refrigerant tubes and as a down-flow condensers with vertically arranged and flowed through the refrigerant tubes. Both types of capacitors are from the EP-A 769 666 known. Capacitors have manifolds into which the refrigerant pipes open, wherein the manifolds are divided by partitions to achieve a multi-flow, meandering flow of the condenser with refrigerant.
  • the condenser usually consists of a condensation section and a subcooling section, in which already liquefied refrigerant is cooled below the condensation temperature.
  • the condenser is associated with a collector, which is arranged parallel to one of the manifolds and communicates with the collector side of the refrigerant side.
  • the collector takes on a filtering and / or drying device and has, inter alia, the task of separating the gaseous and the liquid phase of the refrigerant, so that the supercooling section of the capacitor as liquid as possible Refrigerant is supplied.
  • a downdraft condenser ie with vertically arranged refrigerant pipes (so-called flow-through devices) and horizontally arranged collecting pipes with an underlying integrated collector disclosed.
  • the collector has an inflow chamber with an inflow opening and an outflow chamber with an outflow opening, wherein between the two chambers and between inflow and outflow opening a separation device is provided, which has an overflow opening for liquid refrigerant in its geodetically underlying area.
  • the gaseous phase of the refrigerant is located substantially in the upper half of the collector, ie in the geodetically higher region, whereby a separation of the two phases is achieved.
  • a capacitor of the type mentioned, d. H. to improve a downflow integrated collector downflow condenser in that an effective separation of the gaseous and the liquid phase of the refrigerant is achieved by simple means.
  • the separating device in the collector to a suction device, which is preferably designed as a suction tube and in the longitudinal direction of the collector.
  • the suction tube is passed through the filter and / or drying device, and even into a storage space in which collects in the geodesic lower area refrigerant in the liquid phase.
  • the advantage here is that the refrigerant is sucked off at a point at which adjusts the highest liquid level (level of liquid refrigerant).
  • the suction tube at its end, which projects into the storage space, a proboscis or a downwardly open cap, whereby an effective extraction of liquid refrigerant is possible.
  • the separating device is designed as a plug with a passage for the liquid refrigerant to be sucked.
  • the passage is connected on the one hand to the suction pipe and on the other hand to the discharge opening in the collector; he advantageously has a right-angled deflection, which results from an axially extending longitudinal and a radially extending transverse bore.
  • the stopper is adapted in its cross section to the cross section of the collector, inserted in the latter in the longitudinal direction and sealed against the inner wall of the collector via an O-ring.
  • the filter and / or drying device is arranged in the collector such that a Forced flow from the inflow opening away in the direction of the storage chamber is achieved.
  • the refrigerant flow entering the collector through the inflow opening contains gaseous constituents which are separated due to a slowed flow of refrigerant in the longitudinal direction of the collector and the density differences and collect in the upper (geodetically overhead) region of the collector.
  • the gaseous and the liquid phase are substantially separated, with a maximum liquid level being established in the geodetic lower region of the collector.
  • the proboscis of the aspiration tube dives into it and withdraws the liquid refrigerant.
  • the refrigerant is deflected in a U-shaped manner in the collector and thus covers a relatively long path, which favors a separation of gaseous and liquid phase.
  • the filtering and / or drying device and the suction device are interchangeable with plug, d. H. they can be removed from the collector and exchanged for serviced or new parts.
  • the filter and / or dryer device housed in a plastic housing and the suction tube, as well as the plug, are made of a plastic.
  • Fig. 1 shows a downdraft condenser 1 as a component of a refrigerant circuit, not shown, of an automotive air conditioning system, wherein the condenser 1 is connected via an inlet flange 2 and an outlet flange 3 to the refrigerant circuit.
  • the capacitor 1 has a Condenser network 4 with vertically arranged flat tubes 5 and not shown, arranged between the flat tubes 5 corrugated fins, which are covered by ambient air.
  • a collector 8 which communicates with the manifold 7 on the refrigerant side, which is not shown here.
  • the headers 6, 7 have not shown in their interior partitions, so that there is a multi-flow through the network 4, the penultimate passage by an arrow A and the last passage are shown by an arrow B.
  • the last passage according to the arrow B includes only a few tubes, z. B. four and is referred to as a subcooling section. In this subcooling section, liquid refrigerant predominantly flows, which is cooled below the condensation temperature and subsequently leaves the condenser 1 via the outlet flange 3.
  • Fig. 2 shows the collector 8 located below in connection with the parallel arranged lower manifold 7, both cut longitudinally.
  • the lower manifold 7 has, by way of example, two partitions 7a, 7b and two end walls 7c, 7d and is formed in two parts, ie divided in the longitudinal direction.
  • the collector 8, which has a slightly larger cross-section than the manifold 7, via an inflow opening 9 and an outflow opening 10 with the manifold 7 and with a chamber 11, which communicates with the penultimate passage according to the arrow A, or with a Chamber 12, which communicates with the subcooling B, connected.
  • the formation of the manifold 7 and the collector 8 and their mechanical and refrigerant side connection are incidentally from the EP-A 1 310 748 the applicant known.
  • the collector 8 has an inflow-side chamber 13, which accommodates a filter and / or drier device 14, to which a storage chamber 15 connects.
  • an approximately cylindrically shaped, adapted to the cross section of the collector 8 stopper 16 is arranged, which circumferentially in the region of the partition wall 7 b by a O-ring 17 is sealed against the inner wall of the collector 8.
  • the stopper 16 has an end wall 16a delimiting the inflow chamber 13, to the lower region of which a suction tube 18 is fixed, which is passed through the filter drier 14, extends into the storage chamber 15 and at its end there is a cap 18a (suction nozzle ) having.
  • Fig. 3 shows the collector 8, which has a longitudinal axis a, with manifold 7 in a longitudinal section, wherein the same reference numerals are used for the same parts.
  • the plug 16 is substantially formed as a solid plastic part, which has a passage 19, consisting of an axial bore 19 a and a radial bore 19 b, ie with a 90 ° deflection.
  • the suction pipe 18 is connected and passed through the filter-drying device 14.
  • the protruding into the storage chamber 15 end of the suction tube 18 is covered by the downwardly open cap 18 a and forms a suction.
  • the radial bore 19b is in alignment with the outflow opening 10 and thus communicates with the subcooling section of the condenser shown here by the arrow B.
  • the plug 16 further has in the region of the inflow opening 9 a deflection surface or a recess 20, which establishes a connection between the inflow opening 9 and the inflow chamber 13.
  • the filter-drying device 14 has in its geodetically overhead Beeich, ie approximately in the upper half of the collector an end-side inlet opening 14a and an end-side outlet opening 14b for the refrigerant and thus in the longitudinal direction of the collector 8 can be flowed through.
  • the filter-drying device 14 is known, in particular by the above-mentioned earlier application of the applicant.
  • the suction tube 18, which is in alignment with the axial bore 19 a is arranged in the geodetically lower, ie lowest, region of the collector 8.
  • the collector 8 is closed by a releasable sealing plug 21 - such. B. from the DE-A 100 39 260 the applicant known.
  • a releasable sealing plug 21 - such. B. from the DE-A 100 39 260 the applicant known.
  • the plug 21 is the plug 16 by means of a connecting member 22nd axially fixable in the collector 8.
  • Plug 16 and plug 21 may also be integrally formed.
  • the function of the capacitor according to the invention is based on the Fig. 3 explained below:
  • the largely condensed refrigerant penultimate passage (arrow A) enters via the inflow 9 in the inflow chamber 13 of the collector 8, which results in a delay of the refrigerant flow due to the cross-sectional widening.
  • the refrigerant, z. B. R134a forcibly flows in the direction of the longitudinal axis a through the filter drier 14, where it is cleaned and dried. Subsequently, the refrigerant enters the storage chamber 15, in the upper region, wherein a separation of the gaseous and the liquid phase takes place due to the density differences.
  • the liquid refrigerant thus collects in the lower region of the collector 8 and is withdrawn there via the suction nozzle 18a in the suction pipe 18, passes through the passage 19 with a 90 ° deflection upwards into the manifold 7 and thus into the subcooling section (arrow B ) of the capacitor.
  • the refrigerant which enters through the inflow opening 9 in the collector 8 and exits through the discharge opening 10 again from the collector 8, is thus deflected in this way by 180 ° or U-shaped by first in the upper region of the collector 8 in the Drawing from right to left and then after deflection in the lower region of the collector 8 via the suction pipe 18 in the drawing flows from left to right. In this case takes place on the way in the upper region of the collector 8 at a relatively low flow velocity, a separation of gaseous and liquid phase.

Abstract

The invention relates to a condenser for an air-conditioning system, particularly for a motor vehicle, with vertically arranged tubes, through which a coolant can flow and which are connected to an upper and a lower horizontally arranged manifold whereby permitting the flow of coolant. The inventive condenser also comprises a collector parallelly arranged underneath the lower manifold and, via an inflow opening and an outflow opening, between which a separating device is placed, is connected to the manifold in a manner that permits the flow of coolant. The collector accommodates a filtering and/or drying device. The separating device has a suction device for, in essence, liquid coolant.

Description

Die Erfindung betrifft einen Kondensator für eine Klimaanlage, insbesondere für ein Kraftfahrzeug. Ein Kondensator gemäß dem Oberbegriff des Patentanspruchs 1 ist z.B. in JP-A-11304301 gezeigt.The invention relates to a condenser for an air conditioning system, in particular for a motor vehicle. A capacitor according to the preamble of claim 1 is eg in JP-A-11304301 shown.

Kondensatoren sind Komponenten eines Kältemittelkreislaufes für eine Klimaanlage, wobei der Kondensator bei Klimaanlagen für Kraftfahrzeuge vielfach im vorderen Bereich des Motorraumes zusammen mit einem Kühlmittelkühler angeordnet und befestigt ist. Kondensatoren sind als so genannte Querstromkondensatoren bekannt, d. h. mit waagerecht angeordneten und durchströmten Kältemittelrohren sowie als Fallstromkondensatoren mit senkrecht angeordneten und durchströmten Kältemittelrohren. Beide Typen von Kondensatoren sind aus der EP-A 769 666 bekannt. Kondensatoren weisen Sammelrohre auf, in welche die Kältemittelrohre münden, wobei die Sammelrohre durch Trennwände unterteilt sind, um eine mehrflutige, mäanderförmige Durchströmung des Kondensators mit Kältemittel zu erreichen. Der Kondensator besteht in der Regel aus einem Kondensationsabschnitt und einem Unterkühlabschnitt, in welchem bereits verflüssigtes Kältemittel unter die Kondensationstemperatur abgekühlt wird. Dem Kondensator ist ein Sammler zugeordnet, welcher parallel zu einem der Sammelrohre angeordnet ist und kältemittelseitig mit dem Sammelrohr kommuniziert. Der Sammler nimmt eine Filter- und/oder Trocknungseinrichtung auf und hat u. a. die Aufgabe, die gasförmige und die flüssige Phase des Kältemittels zu trennen, so dass dem Unterkühlungsabschnitt des Kondensators möglichst nur flüssiges Kältemittel zugeführt wird. Für Querstromkondensatoren ist diese Aufgabe bereits vielfach gelöst, und zwar durch senkrecht stehende Sammler, bei welchen sich die flüssige Phase des Kältemittels aufgrund des Dichteunterschiedes unten sammelt und die gasförmige Phase des Kältemittels in den oberen Bereich des Sammlers aufsteigt. Bei Fallstromkondensatoren ist das Problem der Phasentrennung nicht in analoger Weise lösbar - in der EP-A 769 666 z. B. wurde für einen Fallstromkondensator (Ausführungsbeispiel gemäß Fig. 7) ein senkrecht stehender Sammler bei waagerecht angeordneten Sammelrohren vorgeschlagen. Diese Lösung beansprucht offensichtlich erheblichen Bauraum, insbesondere in Luftströmungsrichtung, d. h. Fahrtrichtung des Fahrzeuges.Capacitors are components of a refrigerant circuit for an air conditioner, wherein the condenser in automotive air conditioners is often arranged and fixed in the front of the engine compartment together with a coolant radiator. Capacitors are known as so-called cross-flow condensers, ie with horizontally arranged and flowed through the refrigerant tubes and as a down-flow condensers with vertically arranged and flowed through the refrigerant tubes. Both types of capacitors are from the EP-A 769 666 known. Capacitors have manifolds into which the refrigerant pipes open, wherein the manifolds are divided by partitions to achieve a multi-flow, meandering flow of the condenser with refrigerant. The condenser usually consists of a condensation section and a subcooling section, in which already liquefied refrigerant is cooled below the condensation temperature. The condenser is associated with a collector, which is arranged parallel to one of the manifolds and communicates with the collector side of the refrigerant side. The collector takes on a filtering and / or drying device and has, inter alia, the task of separating the gaseous and the liquid phase of the refrigerant, so that the supercooling section of the capacitor as liquid as possible Refrigerant is supplied. For cross-flow condensers, this task has already been solved in many cases, by vertical collectors, in which the liquid phase of the refrigerant collects due to the density difference below and the gaseous phase of the refrigerant rises in the upper region of the collector. In the case of down-flow capacitors, the problem of phase separation can not be solved in an analogous manner - in EP-A 769 666 z. B. was proposed for a falling-current capacitor (embodiment of FIG. 7) is a vertical collector horizontally arranged headers. This solution obviously requires considerable space, especially in the direction of air flow, ie the direction of travel of the vehicle.

In der älteren Patentanmeldung der Anmelderin DE 103 15 374 , ist ein Fallstromkondensator, d. h. mit senkrecht angeordneten Kältemittelrohren (so genannten Durchflusseinrichtungen) und waagerecht angeordneten Sammelrohren mit einem untenliegenden integrierten Sammler offenbart. Der Sammler weist eine Zuströmkammer mit einer Zuströmöffnung sowie eine Abströmkammer mit einer Abströmöffnung auf, wobei zwischen beiden Kammern und zwischen Zuström- und Abströmöffnung eine Trenneinrichtung vorgesehen ist, welche in ihrem geodätisch unten liegenden Bereich eine Überströmöffnung für flüssiges Kältemittel aufweist. Die gasförmige Phase des Kältemittels befindet sich im Wesentlichen in der oberen Hälfte des Sammlers, d. h. im geodätisch höher liegenden Bereich, wodurch eine Trennung beider Phasen erreicht wird.In the earlier patent application of the Applicant DE 103 15 374 , is a downdraft condenser, ie with vertically arranged refrigerant pipes (so-called flow-through devices) and horizontally arranged collecting pipes with an underlying integrated collector disclosed. The collector has an inflow chamber with an inflow opening and an outflow chamber with an outflow opening, wherein between the two chambers and between inflow and outflow opening a separation device is provided, which has an overflow opening for liquid refrigerant in its geodetically underlying area. The gaseous phase of the refrigerant is located substantially in the upper half of the collector, ie in the geodetically higher region, whereby a separation of the two phases is achieved.

Es ist Aufgabe der vorliegenden Erfindung, einen Kondensator der eingangs genannten Art, d. h. einen Fallstromkondensator mit unten liegendem integrierten Sammler dahingehend zu verbessern, dass eine wirksame Trennung der gasförmigen und der flüssigen Phase des Kältemittels mit einfachen Mitteln erreicht wird.It is an object of the present invention, a capacitor of the type mentioned, d. H. to improve a downflow integrated collector downflow condenser in that an effective separation of the gaseous and the liquid phase of the refrigerant is achieved by simple means.

Diese Aufgabe wird durch die Merkmale des Patentanspruches 1 gelöst. Erfindungsgemäß weist die Trenneinrichtung im Sammler eine Absaugeinrichtung auf, die vorzugsweise als Absaugrohr ausgebildet ist und sich in Längsrichtung des Sammlers erstreckt. Damit wird der Vorteil einer wirksamen Absaugung von flüssigem Kältemittel erreicht, ohne dass zusätzlicher Bauraum beansprucht wird.This object is solved by the features of claim 1. According to the invention, the separating device in the collector to a suction device, which is preferably designed as a suction tube and in the longitudinal direction of the collector. Thus, the advantage of effective extraction of liquid refrigerant is achieved without additional space is claimed.

In einer vorteilhaften Ausgestaltung der Erfindung ist das Absaugrohr durch die Filter- und/oder Trocknungseinrichtung hindurchgeführt, und zwar bis in einen Bevorratungsraum, in welchem sich im geodätisch unteren Bereich Kältemittel in flüssiger Phase sammelt. Vorteilhaft hierbei ist, dass das Kältemittel an einer Stelle abgesaugt wird, an welcher sich der höchste Flüssigkeitspegel (Pegel für flüssiges Kältemittel) einstellt.In an advantageous embodiment of the invention, the suction tube is passed through the filter and / or drying device, and even into a storage space in which collects in the geodesic lower area refrigerant in the liquid phase. The advantage here is that the refrigerant is sucked off at a point at which adjusts the highest liquid level (level of liquid refrigerant).

Gemäß einer vorteilhaften Ausführungsform weist das Absaugrohr an seinem Ende, welches in den Bevorratungsraum hineinragt, einen Rüssel oder eine nach unten geöffnete Kappe auf, wodurch eine effektive Absaugung von flüssigem Kältemittel möglich ist.According to an advantageous embodiment, the suction tube at its end, which projects into the storage space, a proboscis or a downwardly open cap, whereby an effective extraction of liquid refrigerant is possible.

Nach einer vorteilhaften Weiterbildung der Erfindung ist die Trenneinrichtung als Stopfen mit einem Durchgangskanal für das abzusaugende flüssige Kältemittel ausgebildet. Der Durchgangskanal ist einerseits an das Absaugrohr und andererseits an die Abströmöffnung im Sammler angeschlossen; er weist vorteilhafterweise eine rechtwinklige Umlenkung auf, welche sich durch eine axial verlaufende Längs- und eine radial verlaufende Querbohrung ergibt. Damit wird eine Kanalisierung des abgesaugten flüssigen Kältemittels bis vor die Abströmöffnung erreicht und ein Mitführen von gasförmigen Bestandteilen des Kältemittels vermieden.According to an advantageous embodiment of the invention, the separating device is designed as a plug with a passage for the liquid refrigerant to be sucked. The passage is connected on the one hand to the suction pipe and on the other hand to the discharge opening in the collector; he advantageously has a right-angled deflection, which results from an axially extending longitudinal and a radially extending transverse bore. In order for a channeling of the extracted liquid refrigerant is achieved until the outflow opening and avoiding entrainment of gaseous components of the refrigerant.

Gemäß einer vorteilhaften Ausführung ist der Stopfen in seinem Querschnitt an den Querschnitt des Sammlers angepasst, in diesen in Längsrichtung eingeschoben und gegenüber der Innenwand des Sammlers über einen O-Ring abgedichtet. Damit wird der Vorteil erreicht, dass kein gasförmiges Kältemittel den Stopfen in axialer Richtung umströmt und in die Abströmöffnung, d. h. in den Unterkühlabschnitt des Kondensators gelangt.According to an advantageous embodiment, the stopper is adapted in its cross section to the cross section of the collector, inserted in the latter in the longitudinal direction and sealed against the inner wall of the collector via an O-ring. Thus, the advantage is achieved that no gaseous refrigerant flows around the plug in the axial direction and in the outflow, d. H. enters the subcooling section of the capacitor.

Nach einer weiteren vorteilhaften Ausgestaltung der Erfindung ist die Filter- und/oder Trocknungseinrichtung derart im Sammler angeordnet, dass eine Zwangsdurchströmung von der Zuströmöffnung weg in Richtung der Bevorratungskammer erreicht wird. Die durch die Zuströmöffnung in den Sammler eintretende Kältemittelströmung enthält gasförmige Bestandteile, welche aufgrund einer verlangsamten Kältemittelströmung in Längsrichtung des Sammlers und der Dichteunterschiede abgeschieden werden und sich im oberen (geodätisch oben liegenden) Bereich des Sammlers sammeln. Im Bevorratungsraum sind die gasförmige und die flüssige Phase im Wesentlichen getrennt, wobei sich im geodätisch unteren Bereich des Sammlers ein maximaler Flüssigkeitspegel einstellt. In diesen taucht - wie erwähnt - der Rüssel des Absaugrohres ein und zieht das flüssige Kältemittel ab. Für die Gesamtanordnung ergibt sich somit der Vorteil, dass das Kältemittel U-förmig im Sammler umgelenkt wird und damit einen relativ langen Weg zurücklegt, der eine Trennung von gasförmiger und flüssiger Phase begünstigt.According to a further advantageous embodiment of the invention, the filter and / or drying device is arranged in the collector such that a Forced flow from the inflow opening away in the direction of the storage chamber is achieved. The refrigerant flow entering the collector through the inflow opening contains gaseous constituents which are separated due to a slowed flow of refrigerant in the longitudinal direction of the collector and the density differences and collect in the upper (geodetically overhead) region of the collector. In the storage space, the gaseous and the liquid phase are substantially separated, with a maximum liquid level being established in the geodetic lower region of the collector. As mentioned, the proboscis of the aspiration tube dives into it and withdraws the liquid refrigerant. For the overall arrangement, there is thus the advantage that the refrigerant is deflected in a U-shaped manner in the collector and thus covers a relatively long path, which favors a separation of gaseous and liquid phase.

Nach einer bevorzugten Ausführungsform sind die Filter- und/oder Trocknereinrichtung sowie die Absaugeinrichtung mit Stopfen tauschbar, d. h. sie können dem Sammler entnommen und gegen gewartete oder neue Teile getauscht werden.According to a preferred embodiment, the filtering and / or drying device and the suction device are interchangeable with plug, d. H. they can be removed from the collector and exchanged for serviced or new parts.

Weitere bevorzugte Ausführungsformen sehen vor, dass die Filter- und/oder Trocknereinrichtung in einem Kunststoffgehäuse untergebracht und das Absaugrohr, ebenso wie der Stopfen, aus einem Kunststoff hergestellt sind.Further preferred embodiments provide that the filter and / or dryer device housed in a plastic housing and the suction tube, as well as the plug, are made of a plastic.

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im Folgenden näher beschrieben. Es zeigen

Fig. 1
einen Fallstromkondensator mit unten liegendem Sammler,
Fig. 2
eine perspektivische Darstellung des aufgeschnitten Sammlers mit Sammelrohr und
Fig. 3
einen Längsschnitt durch den Sammler mit Sammelrohr.
An embodiment of the invention is illustrated in the drawing and will be described in more detail below. Show it
Fig. 1
a downdraft condenser with bottom collector,
Fig. 2
a perspective view of the cut collector with manifold and
Fig. 3
a longitudinal section through the collector with manifold.

Fig. 1 zeigt einen Fallstromkondensator 1 als Komponente eines nicht dargestellten Kältemittelkreislaufes einer Kraftfahrzeugklimaanlage, wobei der Kondensator 1 über einen Eintrittsflansch 2 und einen Austrittsflansch 3 an den Kältemittelkreislauf angeschlossen ist. Der Kondensator 1 weist ein Kondensatornetz 4 mit senkrecht angeordneten Flachrohren 5 und nicht dargestellten, zwischen den Flachrohren 5 angeordneten Wellrippen auf, welche von Umgebungsluft überströmt werden. Die vom Kältemittel durchströmten Flachrohre 5, vorzugsweise als extrudierte Mehrkammerrohre ausgebildet, münden mit ihren Rohrenden in ein oberes, waagerecht angeordnetes Sammelrohr 6 und in ein unteres, waagerecht angeordnetes Sammelrohr 7. Unterhalb und parallel zu dem unteren Sammelrohr 7 ist ein Sammler 8 angeordnet, welcher mit dem Sammelrohr 7 kältemittelseitig kommuniziert, was hier nicht dargestellt ist. Die Sammelrohre 6, 7 weisen in ihrem Inneren nicht dargestellte Trennwände auf, so dass sich eine mehrflutige Durchströmung des Netzes 4 ergibt, wobei der vorletzte Durchgang durch einen Pfeil A und der letzte Durchgang durch einen Pfeil B dargestellt sind. Der letzte Durchgang entsprechend dem Pfeil B umfasst nur wenige Rohre, z. B. vier und wird als Unterkühlabschnitt bezeichnet. In diesem Unterkühlabschnitt strömt vorwiegend flüssiges Kältemittel, welches unter die Kondensationstemperatur abgekühlt wird und den Kondensator 1 anschlie-βend über den Austrittsflansch 3 verlässt. Fig. 1 shows a downdraft condenser 1 as a component of a refrigerant circuit, not shown, of an automotive air conditioning system, wherein the condenser 1 is connected via an inlet flange 2 and an outlet flange 3 to the refrigerant circuit. The capacitor 1 has a Condenser network 4 with vertically arranged flat tubes 5 and not shown, arranged between the flat tubes 5 corrugated fins, which are covered by ambient air. The through-flow of the refrigerant flat tubes 5, preferably formed as extruded multi-chamber tubes, open with their tube ends in an upper, horizontally arranged manifold 6 and in a lower, horizontally arranged manifold 7. Below and parallel to the lower manifold 7, a collector 8 is arranged, which communicates with the manifold 7 on the refrigerant side, which is not shown here. The headers 6, 7 have not shown in their interior partitions, so that there is a multi-flow through the network 4, the penultimate passage by an arrow A and the last passage are shown by an arrow B. The last passage according to the arrow B includes only a few tubes, z. B. four and is referred to as a subcooling section. In this subcooling section, liquid refrigerant predominantly flows, which is cooled below the condensation temperature and subsequently leaves the condenser 1 via the outlet flange 3.

Fig. 2 zeigt den unten liegenden Sammler 8 in Verbindung mit dem parallel angeordneten unteren Sammelrohr 7, beide in Längsrichtung aufgeschnitten. Das untere Sammelrohr 7 weist exemplarisch zwei Trennwände 7a, 7b sowie zwei Abschlusswände 7c, 7d auf und ist zweiteilig ausgebildet, d. h. in Längsrichtung geteilt. Der Sammler 8, der einen etwas größeren Querschnitt als das Sammelrohr 7 aufweist, ist über eine Zuströmöffnung 9 und eine Abströmöffnung 10 mit dem Sammelrohr 7 bzw. mit einer Kammer 11, welche mit dem vorletzten Durchgang entsprechend dem Pfeil A kommuniziert, bzw. mit einer Kammer 12, welche mit dem Unterkühlabschnitt B kommuniziert, verbunden. Die Ausbildung des Sammelrohres 7 und des Sammlers 8 sowie ihre mechanische und kältemittelseitige Verbindung sind im Übrigen aus der EP-A 1 310 748 der Anmelderin bekannt. Der Sammler 8 weist eine zuströmseitige Kammer 13 auf, welche eine Filter- und/oder Trocknereinrichtung 14 aufnimmt, an welche eine Bevorratungskammer 15 anschließt. Im Bereich der Zu- und Abströmöffnungen 9, 10 ist ein etwa zylinderförmig ausgebildeter, an den Querschnitt des Sammlers 8 angepasster Stopfen 16 angeordnet, welcher umfangseitig im Bereich der Trennwand 7b durch einen O-Ring 17 gegenüber der Innenwand des Sammlers 8 abgedichtet ist. Der Stopfen 16 weist eine die Zuströmkammer 13 begrenzende Stirnwand 16a auf, an deren unterem Bereich ein Absaugrohr 18 befestigt ist, welches durch die Filter-Trocknereinrichtung 14 hindurchgeführt ist, sich bis in die Bevorratungskammer 15 erstreckt und an seinem dortigen Ende eine Abdeckkappe 18a (Ansaugrüssel) aufweist. Fig. 2 shows the collector 8 located below in connection with the parallel arranged lower manifold 7, both cut longitudinally. The lower manifold 7 has, by way of example, two partitions 7a, 7b and two end walls 7c, 7d and is formed in two parts, ie divided in the longitudinal direction. The collector 8, which has a slightly larger cross-section than the manifold 7, via an inflow opening 9 and an outflow opening 10 with the manifold 7 and with a chamber 11, which communicates with the penultimate passage according to the arrow A, or with a Chamber 12, which communicates with the subcooling B, connected. The formation of the manifold 7 and the collector 8 and their mechanical and refrigerant side connection are incidentally from the EP-A 1 310 748 the applicant known. The collector 8 has an inflow-side chamber 13, which accommodates a filter and / or drier device 14, to which a storage chamber 15 connects. In the region of the inflow and outflow openings 9, 10, an approximately cylindrically shaped, adapted to the cross section of the collector 8 stopper 16 is arranged, which circumferentially in the region of the partition wall 7 b by a O-ring 17 is sealed against the inner wall of the collector 8. The stopper 16 has an end wall 16a delimiting the inflow chamber 13, to the lower region of which a suction tube 18 is fixed, which is passed through the filter drier 14, extends into the storage chamber 15 and at its end there is a cap 18a (suction nozzle ) having.

Fig. 3 zeigt den Sammler 8, der eine Längsachse a aufweist, mit Sammelrohr 7 in einem Längsschnitt, wobei für gleiche Teile gleiche Bezugszahlen verwendet werden. Der Stopfen 16 ist im Wesentlichen als massives Kunststoffteil ausgebildet, welches einen Durchgangskanal 19, bestehend aus einer Axialbohrung 19a und einer Radialbohrung 19b, d. h. mit einer 90°-Umlenkung aufweist. An die Axialbohrung 19a ist das Absaugrohr 18 angeschlossen und durch die Filter-Trocknereinrichtung 14 hindurchgeführt. Das in die Bevorratungskammer 15 hineinragende Ende des Absaugrohres 18 ist durch die nach unten offene Kappe 18a abgedeckt und bildet einen Ansaugrüssel. Die Radialbohrung 19b fluchtet mit der Abströmöffnung 10 und kommuniziert somit mit dem hier durch den Pfeil B dargestellten Unterkühlabschnitt des Kondensators. Der Stopfen 16 weist ferner im Bereich der Zuströmöffnung 9 eine Umlenkfläche bzw. eine Aussparung 20 auf, welche eine Verbindung zwischen der Zuströmöffnung 9 und der Zuströmkammer 13 herstellt. Die Filter-Trocknereinrichtung 14 weist in ihrem geodätisch oben liegenden Beeich, d. h. etwa in der oberen Hälfte des Sammlers eine stirnseitige Eintrittsöffnung 14a und eine stirnseitige Austrittsöffnung 14b für das Kältemittel auf und ist somit in Längsrichtung des Sammlers 8 durchströmbar. Im Übrigen ist die Filter-Trocknereinrichtung 14 bekannt, insbesondere durch die eingangs erwähnte ältere Anmeldung der Anmelderin. Wie bereits erwähnt, ist das Absaugrohr 18, welches mit der Axialbohrung 19a fluchtet, im geodätisch unten, d. h. tiefstliegenden Bereich des Sammlers 8 angeordnet. Fig. 3 shows the collector 8, which has a longitudinal axis a, with manifold 7 in a longitudinal section, wherein the same reference numerals are used for the same parts. The plug 16 is substantially formed as a solid plastic part, which has a passage 19, consisting of an axial bore 19 a and a radial bore 19 b, ie with a 90 ° deflection. To the axial bore 19 a, the suction pipe 18 is connected and passed through the filter-drying device 14. The protruding into the storage chamber 15 end of the suction tube 18 is covered by the downwardly open cap 18 a and forms a suction. The radial bore 19b is in alignment with the outflow opening 10 and thus communicates with the subcooling section of the condenser shown here by the arrow B. The plug 16 further has in the region of the inflow opening 9 a deflection surface or a recess 20, which establishes a connection between the inflow opening 9 and the inflow chamber 13. The filter-drying device 14 has in its geodetically overhead Beeich, ie approximately in the upper half of the collector an end-side inlet opening 14a and an end-side outlet opening 14b for the refrigerant and thus in the longitudinal direction of the collector 8 can be flowed through. Incidentally, the filter-drying device 14 is known, in particular by the above-mentioned earlier application of the applicant. As already mentioned, the suction tube 18, which is in alignment with the axial bore 19 a, is arranged in the geodetically lower, ie lowest, region of the collector 8.

Der Sammler 8 ist durch einen lösbaren Verschlussstopfen 21 verschließbar - wie z. B. aus der DE-A 100 39 260 der Anmelderin bekannt. Über den Verschlussstopfen 21 ist der Stopfen 16 mittels eines Verbindungsgliedes 22 axial im Sammler 8 fixierbar. Stopfen 16 und Verschlussstopfen 21 können auch einstückig ausgebildet sein.The collector 8 is closed by a releasable sealing plug 21 - such. B. from the DE-A 100 39 260 the applicant known. About the plug 21 is the plug 16 by means of a connecting member 22nd axially fixable in the collector 8. Plug 16 and plug 21 may also be integrally formed.

Die Funktion des erfindungsgemäßen Kondensators wird anhand der Fig. 3 im Folgenden erläutert: Das weitestgehend kondensierte Kältemittel des vorletzten Durchganges (Pfeil A) tritt über die Zuströmöffnung 9 in die Zuströmkammer 13 des Sammlers 8 ein, wobei sich aufgrund der Querschnittserweiterung eine Verzögerung der Kältemittelströmung ergibt. Das Kältemittel, z. B. R134a strömt zwangsweise in Richtung der Längsachse a durch die Filter-Trocknereinrichtung 14, wo es gereinigt und getrocknet wird. Anschließend tritt das Kältemittel in die Bevorratungskammer 15 ein, und zwar in deren oberen Bereich, wobei eine Trennung der gasförmigen und der flüssigen Phase aufgrund der Dichteunterschiede erfolgt. Das flüssige Kältemittel sammelt sich somit im unteren Bereich des Sammlers 8 und wird dort über den Ansaugrüssel 18a in das Absaugrohr 18 abgezogen, gelangt über den Durchgangskanal 19 mit einer 90°-Umlenkung nach oben in das Sammelrohr 7 und damit in den Unterkühlabschnitt (Pfeil B) des Kondensators.The function of the capacitor according to the invention is based on the Fig. 3 explained below: The largely condensed refrigerant penultimate passage (arrow A) enters via the inflow 9 in the inflow chamber 13 of the collector 8, which results in a delay of the refrigerant flow due to the cross-sectional widening. The refrigerant, z. B. R134a forcibly flows in the direction of the longitudinal axis a through the filter drier 14, where it is cleaned and dried. Subsequently, the refrigerant enters the storage chamber 15, in the upper region, wherein a separation of the gaseous and the liquid phase takes place due to the density differences. The liquid refrigerant thus collects in the lower region of the collector 8 and is withdrawn there via the suction nozzle 18a in the suction pipe 18, passes through the passage 19 with a 90 ° deflection upwards into the manifold 7 and thus into the subcooling section (arrow B ) of the capacitor.

Das Kältemittel, welches durch die Zuströmöffnung 9 in den Sammler 8 eintritt und über die Abströmöffnung 10 wieder aus dem Sammler 8 austritt, wird also auf diesem Wege um 180° oder U-förmig umgelenkt, indem es zunächst im oberen Bereich des Sammlers 8 in der Zeichnung von rechts nach links und dann nach Umlenkung im unteren Bereich des Sammlers 8 über das Absaugrohr 18 in der Zeichnung von links nach rechts strömt. Dabei findet auf dem Weg im oberen Bereich des Sammlers 8 bei relativ niedriger Strömungsgeschwindigkeit eine Trennung von gasförmiger und flüssiger Phase statt.The refrigerant, which enters through the inflow opening 9 in the collector 8 and exits through the discharge opening 10 again from the collector 8, is thus deflected in this way by 180 ° or U-shaped by first in the upper region of the collector 8 in the Drawing from right to left and then after deflection in the lower region of the collector 8 via the suction pipe 18 in the drawing flows from left to right. In this case takes place on the way in the upper region of the collector 8 at a relatively low flow velocity, a separation of gaseous and liquid phase.

Claims (14)

  1. A condenser for an air conditioning system, in particular for a motor vehicle with pipes (5) which are arranged vertically, through which a coolant flows and which have a coolant connection to an upper manifold pipe (6) and a lower manifold pipe (7), said manifold pipes (6, 7) being respectively arranged horizontally, and having a manifold (8) which is arranged parallel underneath the lower manifold pipe (7), characterized in that the manifold (8) has a coolant connection to the manifold pipe (7) via an inflow opening (9) and an outflow opening (10), a separating device being arranged between them, and accommodates a filter device and/or drying device (14), the separating device having an extractor device for essentially fluid coolant.
  2. The condenser as claimed in claim 1, characterized in that the extractor device is embodied as an extraction pipe (18) which is arranged in the geodetically lowest region of the manifold pipe (8).
  3. The condenser as claimed in claim 2, characterized in that the extraction pipe (18) extends in the longitudinal direction of the manifold (8) and leads through the filter device and/or drying device (14).
  4. The condenser as claimed in claim 1, 2 or 3, characterized in that the separating device is embodied as a stopper (16) with a through-duct (19, 19a, 19b) which connects the outflow opening (10) to the extractor device or the extraction pipe (18).
  5. The condenser as claimed in claim 4, characterized in that the stopper (16) is inserted into the manifold (8) and is sealed around the circumference in the region between the inflow opening (9) and outflow opening (10), in particular by means of a sealing ring (17).
  6. The condenser as claimed in claim 4 or 5, characterized in that the through-duct (19) is formed by a longitudinal bore (19a) and a transverse bore (19b), the transverse bore (19b) being aligned with the outflow opening (10), and the longitudinal bore (19a) being aligned with the extraction pipe (18).
  7. The condenser as claimed in claim 4, 5 or 6, characterized in that the stopper (16) has, in the region of the inflow opening (9), a cutout (20) for diverting the flow, in particular in the longitudinal direction of the manifold (8).
  8. The condenser as claimed in one of the preceding claims, characterized in that the manifold (8) has a supply chamber (15) at its end facing away from the inflow opening (9).
  9. The condenser as claimed in claim 8, characterized in that inflowing coolant can flow through the filter device and/or drying device (14) in the geodetically upper region (14a, 14b).
  10. The condenser as claimed in claims 3 and 9, characterized in that the extraction pipe (18) has an intake end (18a) which is arranged in the region which is geodetically at the bottom of the supply chamber (15).
  11. The condenser as claimed in claim 10, characterized in that the intake end is embodied as an intake tube (18a).
  12. The condenser as claimed in one of the preceding claims, characterized in that the filter device and/or drying device (14), the stopper (16) and/or the intake pipe (18) can be exchanged.
  13. The condenser as claimed in one of the preceding claims, characterized in that the stopper (16) and/or the intake pipe (18) can be manufactured from plastic, in particular in one piece.
  14. The condenser as claimed in one of the preceding claims, characterized in that the stopper (16) is embodied as a closure stopper of the manifold (8).
EP05747670A 2004-05-05 2005-05-04 Condenser for an air-conditioning system, particularly for a motor vehicle Not-in-force EP1745255B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004022714A DE102004022714A1 (en) 2004-05-05 2004-05-05 Condenser for an air conditioning system, in particular for a motor vehicle
PCT/EP2005/004855 WO2005108896A1 (en) 2004-05-05 2005-05-04 Condenser for an air-conditioning system, particularly for a motor vehicle

Publications (2)

Publication Number Publication Date
EP1745255A1 EP1745255A1 (en) 2007-01-24
EP1745255B1 true EP1745255B1 (en) 2012-01-25

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP05747670A Not-in-force EP1745255B1 (en) 2004-05-05 2005-05-04 Condenser for an air-conditioning system, particularly for a motor vehicle

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US (1) US7832230B2 (en)
EP (1) EP1745255B1 (en)
AT (1) ATE543063T1 (en)
DE (1) DE102004022714A1 (en)
WO (1) WO2005108896A1 (en)

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DE102005035344A1 (en) * 2005-07-28 2007-02-01 Modine Manufacturing Co., Racine Removal device for desiccant
JP4345843B2 (en) * 2007-04-27 2009-10-14 株式会社デンソー Heat exchanger
DE102012222664A1 (en) * 2012-08-09 2014-03-06 Behr Gmbh & Co. Kg capacitor
DE102014002407B4 (en) * 2014-02-20 2017-12-21 Modine Manufacturing Company Brazed heat exchanger
JP6575769B2 (en) * 2014-02-26 2019-09-18 デンソー サーマル システムズ エス．ピー．エーＤｅｎｓｏ Ｔｈｅｒｍａｌ Ｓｙｓｔｅｍｓ Ｓ．Ｐ．Ａ． Horizontal condenser with coolant accumulator
EP3855101B1 (en) * 2020-01-22 2023-05-17 Valeo Autosystemy SP. Z.O.O. A heat exchanger with horizontally positioned receiver drier

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Also Published As

Publication number Publication date
US7832230B2 (en) 2010-11-16
EP1745255A1 (en) 2007-01-24
DE102004022714A1 (en) 2005-12-15
WO2005108896A1 (en) 2005-11-17
US20080156012A1 (en) 2008-07-03
ATE543063T1 (en) 2012-02-15

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