EP1853859B1 - Coolant collector comprising a filter/dryer unit - Google Patents

Coolant collector comprising a filter/dryer unit Download PDF

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Publication number
EP1853859B1
EP1853859B1 EP06723160A EP06723160A EP1853859B1 EP 1853859 B1 EP1853859 B1 EP 1853859B1 EP 06723160 A EP06723160 A EP 06723160A EP 06723160 A EP06723160 A EP 06723160A EP 1853859 B1 EP1853859 B1 EP 1853859B1
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EP
European Patent Office
Prior art keywords
filter
dryer unit
accordance
coolant collector
interior space
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Not-in-force
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EP06723160A
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German (de)
French (fr)
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EP1853859A2 (en
Inventor
Peter Klug
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Eaton Fluid Power GmbH
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Eaton Fluid Power GmbH
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Publication of EP1853859A2 publication Critical patent/EP1853859A2/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
    • 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
    • F25B2309/00—Gas cycle refrigeration machines
    • F25B2309/06—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide
    • F25B2309/061—Compression machines, plants or systems characterised by the refrigerant being carbon dioxide with cycle highest pressure above the supercritical pressure
    • 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
    • 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
    • F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
    • F25B9/002—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant
    • F25B9/008—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the refrigerant the refrigerant being carbon dioxide

Definitions

  • the invention relates to a refrigerant collector with filter / dryer unit for refrigeration systems.
  • the refrigerant collector according to the invention is particularly suitable for motor vehicle air conditioning systems and in particular for those which are operated with carbon dioxide as the refrigerant.
  • a refrigerant collector is known with a pressure-resistant upright vessel whose wall comprises a bottom and an upper end and includes an interior.
  • a tube having an arranged in the interior end.
  • the pipe end opens into the interior and can thus supply it with a fluid.
  • Another pipe leading through the upper end into the interior space carries at its lower end a filter / dryer unit located above the floor.
  • one of the tubes near the bottom may have a U-shaped curvature to which a small aperture provided with a filter is attached. Through this opening fluid can penetrate into the U-tube, for example, to introduce oil into the tube.
  • the compressors of CO 2 refrigeration machines but also the compressors of other refrigerators are relatively sensitive to sucked fluid drops and in particular solid particles. It is therefore desirable to ensure that the refrigerant flow sucked in by the compressors contains in particular no solid particles.
  • the refrigerant collector according to the invention is based on a pressure-resistant, upright vessel with wall, bottom and .oberem conclusion, so that a closed interior is enclosed.
  • a first tube leads into the interior and a second tube leads out of the interior.
  • a filter / dryer unit is arranged; fed by the tube leading into the interior becomes.
  • the filter / dryer unit is supplied approximately in its center with refrigerant.
  • the filter / dryer unit has at least one, but preferably a plurality of large-area outlets, whose cross section exceeds the cross section of the feeding pipe. The outlets open into the interior of the container, in which thus both oil and liquid refrigerant can collect.
  • the tube leading out of the interior space has an upper open end, which is preferably arranged above the filter / dryer unit. It leads from this point out of the interior. In this case, it is preferably guided in a U-shape around the filter / dryer unit, wherein a lower pipe bend of the pipe leading out of the interior runs directly above the bottom of the vessel. In this area, a suction opening is preferably arranged. The pipe bend undercuts an oil level, which forms in the vessel. As a result, the refrigerant flow leaving the vessel can be metered in via the intake opening and carried along with it. This is desired for lubrication of the connected compressors.
  • the filter / dryer unit separates the refrigerant level from the upwardly towering open tube end of the tube leading out of the inner space, so that no splashes of refrigerant can get into the open tube end, even if the refrigerant collector when installed in a motor vehicle shaken during heavy driving maneuvers or bumpy roads.
  • the upper end of the vessel is preferably formed flat or slightly rounded, the two tubes side by side into the vessel and lead out of this.
  • an approximately cylindrical vapor dome is formed, in which refrigerant is predominantly in the gaseous phase and can be withdrawn well.
  • the connection of the two side by side preferably parallel to each other oriented tubes is also simple and clear.
  • the filter / dryer unit occupies the entire cross-section of the interior in such a way that it defines only a relatively narrow annular gap with the wall of the vessel. Out of this annular gap, refrigerant with a relatively low flow rate enters the upper area serving as vapor dome. Sloshing movements of the refrigerant level located below the filter / dryer unit hardly lead to liquid refrigerant reaching the area above the filter / dryer unit. This is certainly not the case in view of the preferred height (axial extent) of the filter / dryer unit, which is preferably larger than the diameter thereof.
  • the filter / dryer unit preferably has a housing with a flat top and an approximately cylindrical outer periphery. This effectively separates the liquid refrigerant phase from the vapor refrigerant phase. In addition, it offers a sufficiently large interior to accommodate a large desiccant portion.
  • the tip of the bottom is preferably located centrally in the housing approximately below the feeding tube.
  • the cone angle is relatively large and is preferably between 120 ° and 170 °.
  • This shape of the bottom has proved to be advantageous both in terms of the forming flow pattern as well as purely practical because it allows a good compaction of the dryer granules when closing the filter / dryer unit. This is especially true when the bottom is inserted into the housing of the filter / dryer unit from below and then, for example, through Locking means is fixed.
  • the dry granules are flowed through substantially radially, wherein the flow rate is low and decreases towards the outside. This allows intimate contact between dry granulate and refrigerant fluid.
  • the low flow rate in the housing of the filter / dryer unit results in a low pressure drop across the refrigerant collector.
  • Spherical granules are preferably used as dry granules, which provides optimum contact between the refrigerant and the dry granules.
  • the filter / dryer unit On the inlet side, the filter / dryer unit is provided with an inlet basket having at its periphery and at its bottom outlet openings, e.g. Has holes and slots.
  • the inlet basket allows the introduction of refrigerant fluid into the dry granulate with low pressure drop.
  • a fine filter is preferably arranged. This is e.g. formed by a fine stainless steel mesh, a stainless steel felt or the like.
  • the mesh size is preferably in the range of 30 microns to 60 microns.
  • the conical bottom is a prerequisite that leads to a good separation of gaseous and liquid phase.
  • the accumulation of liquid refrigerant and / or oil in the filter / dryer unit is safely avoided.
  • the dryer granules themselves are kept free of liquids, so that its effectiveness is not affected by oil or liquid refrigerant.
  • the outlet windows occupy almost the entire outer circumference of the housing of the filter / dryer unit. This further leads to an efficient use of the desiccant through slow flow as well as safe discharge of liquid refrigerant and oil from the housing of the filter / dryer unit.
  • the outer periphery 14 is provided with radially outwardly projecting Abstandshalternasen 15, which are preferably in the form of elongated vertical, ie axially oriented ribs 16, 17, 18 are formed.
  • On the outer periphery 14 are also outlet windows 19, 20, 21, 22, 23 (see FIG. 2 and 3 ) formed from the FIG. 3 apparent interior 24 of the housing 11 open on its entire peripheral surface to the interior 9 of the vessel 3 out.
  • the outlet windows 19 to 23 are separated from each other only by narrow webs, which connect the upper end plate located on the upper side 13 with a lower ring 25 which holds a bottom 26 inserted into the housing 11.
  • the outlet windows 19 to 23 may be provided with a plastic grid, which supports the filter used later explained and protects against manual damage, in particular during assembly.
  • the bottom 26 is preferably, like the rest of the housing 11, made of plastic. It has an upwardly extending from an annular rim 27 conical bottom portion 28 which has a cone angle of preferably about 130 ° to 150 °.
  • the bottom 26 is preferably connected to the ring 25 via latching means not further illustrated. Its outer edge 29 terminates with the upper edge of the ring 25 or is located just above it.
  • the vessel 2 is arranged vertically, i. its tubes 7, 8 lead substantially vertically into the interior 9.
  • the central axis of the cylindrical wall is oriented vertically.
  • refrigerant from a refrigerator first flows into the filter / dryer unit dividing the inner space 9 into an upper area 38 serving as a steam dome and a lower area 39 serving as a liquid collector.
  • the refrigerant is usually a three-phase mixture consisting of gaseous refrigerant, liquid refrigerant and liquid oil particles. It first enters the inlet basket 31 and leaves it through the slots 32 and the openings 33 through which it enters the dense packing of the preferably spherical dryer body.
  • Liquid ingredients i. Liquid refrigerant and oil reach the bottom portion 28 and run on this outward. They exit the filter / dryer unit 10 through the outlet windows 19 to 23 and then run down the ring 25 in the subspace formed by the area 39. Gaseous refrigerant collects, however, predominantly in the region 38 of the interior 9, from which they are withdrawn via the pipe 8.
  • a refrigerant receiver 1 with filter / dryer unit 10 has an elongate, vertically oriented interior, which is subdivided by the filter / dryer unit 10 into an upper area 38 and a lower area 39.
  • Inflowing refrigerant is through a pipe 7 of the Filter / dryer unit 10 which has its outlet window at its outer periphery, which defines a relatively narrow gap with the wall 3 of the vessel 2 of the refrigerant collector 1.
  • Liquid components drip down and collect below the filter / dryer unit. Gaseous components accumulate predominantly above the filter / dryer unit 10.

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  • Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Drying Of Solid Materials (AREA)
  • Drying Of Gases (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

Disclosed is a coolant collector ( 1 ) comprising a filter/dryer unit ( 10 ) and an elongate, vertically oriented interior space which is subdivided into an upper area ( 38 ) and a lower area ( 39 ) by means of the filter/dryer unit ( 10 ). A flowing coolant is delivered to the filter/dryer unit ( 10 ) via a pipe ( 7 ). The outlet windows of the filter/dryer unit ( 10 ) are located on the outer circumference thereof which delimits a relatively narrow gap along with the wall ( 3 ) of the receptacle ( 2 ) of the coolant collector ( 1 ). Liquid components drip downwards and accumulate below the filter/dryer unit while gaseous components accumulate primarily above the filter/dryer unit ( 10 ).

Description

Die Erfindung betrifft einen Kältemittelsammler mit Filter/Trockner-Einheit für Kälteanlagen. Der erfindungsgemäße Kältemittelsammler eignet sich insbesondere für Kraftfahrzeugklimaanlagen und hier insbesondere für solche, die mit Kohlendioxid als Kältemittel betrieben werden.The invention relates to a refrigerant collector with filter / dryer unit for refrigeration systems. The refrigerant collector according to the invention is particularly suitable for motor vehicle air conditioning systems and in particular for those which are operated with carbon dioxide as the refrigerant.

Kältemittelsammler werden in der Regel von Kältemittel durchströmt, wobei sie einen Kältemittelvorrat bereithalten. Dieser puffert geringere Kältemittelverluste der Kältemaschine sowie unterschiedliche Einsatzbedingungen derselben. Deshalb befindet sich in der Regel ein gewisser Vorrat flüssigen Kältemittels in dem Kältemittelsammler. Das Kältemittel muss trocken sein. Bildet sich in der Kältemaschine an ungünstigen Stellen Eis, kann dies zu Betriebsstörungen und auch zu Schädigungen der Kältemaschine führen. Deshalb weisen Kälteanlagen in der Regel Trockner auf. Diese sind z.B. rohrförmige Vorratsgefäße, in denen ein wasserabsorbierendes Material z.B. ein Granulat angeordnet ist. Dieses wird von dem Kältemittel durchströmt. Dabei kommt es darauf an, einen ausreichend innigen Kontakt zwischen dem Kältemittel und dem Trocknermaterial sicherzustellen.Refrigerant collectors are usually traversed by refrigerant, while holding a supply of refrigerant. This buffers lower refrigerant losses of the chiller and different operating conditions of the same. Therefore, there is usually a certain supply of liquid refrigerant in the refrigerant collector. The refrigerant must be dry. If ice forms in unfavorable places in the chiller, this can lead to malfunctions and damage to the chiller. Therefore, refrigeration plants usually have dryers. These are e.g. tubular storage vessels in which a water-absorbing material e.g. a granule is arranged. This is flowed through by the refrigerant. It is important to ensure a sufficiently intimate contact between the refrigerant and the dryer material.

Aus der US-A-4,457,843 ist ein Kältemittelsammler mit einem druckfesten aufrecht stehenden Gefäß bekannt, dessen Wandung einen Boden und einen oberen Abschluss umfasst und einen Innenraum einschließt. In den Innenraum führt ein Rohr, das ein in dem Innenraum angeordnetes Ende aufweist. Das Rohrende mündet in den Innenraum und kann diesen somit mit einem Fluid versorgen. Ein anderes durch den oberen Abschluss in den Innenraum führendes Rohr trägt an seinem unteren Ende ein Filter-/Trocknereinheit, die oberhalb des Bodens angeordnet ist. Außerdem kann eines der Rohre in der Nähe des Bodens eine U-förmige Krümmung aufweisen, an der eine kleine mit einem Filter versehene Öffnung angebracht ist. Über diese Öffnung kann Fluid in das U-Rohr eindringen, um beispielsweise Öl in das Rohr einzuleiten.From the US-A-4,457,843 a refrigerant collector is known with a pressure-resistant upright vessel whose wall comprises a bottom and an upper end and includes an interior. Into the interior leads a tube having an arranged in the interior end. The pipe end opens into the interior and can thus supply it with a fluid. Another pipe leading through the upper end into the interior space carries at its lower end a filter / dryer unit located above the floor. In addition, one of the tubes near the bottom may have a U-shaped curvature to which a small aperture provided with a filter is attached. Through this opening fluid can penetrate into the U-tube, for example, to introduce oil into the tube.

Insbesondere die Kompressoren von CO2-Kältemaschinen aber auch die Kompressoren anderer Kältemaschinen sind relativ empfindlich gegen angesaugte Fluidtropfen und insbesondere Feststoffpartikel. Es wird deshalb gewünscht, sicher dafür zu sorgen, dass der von den Kompressoren angesaugte Kältemittelstrom insbesondere keine Feststoffpartikel enthält.In particular, the compressors of CO 2 refrigeration machines but also the compressors of other refrigerators are relatively sensitive to sucked fluid drops and in particular solid particles. It is therefore desirable to ensure that the refrigerant flow sucked in by the compressors contains in particular no solid particles.

Davon ausgehend ist es Aufgabe der Erfindung, eine Einheit zu schaffen, die wenigstens einige der oben genannten Probleme auf technisch einfache und zuverlässige Weise löst.On this basis, it is an object of the invention to provide a unit which solves at least some of the above problems in a technically simple and reliable manner.

Diese Aufgabe wird mit dem Kältemittelsammler mit integrierter Filter/Trockner-Einheit gemäß Anspruch 1 gelöst:This object is achieved with the refrigerant collector with integrated filter / dryer unit according to claim 1:

Der erfindungsgemäße Kältemittelsammler beruht auf einem druckfesten, aufrecht stehenden Gefäß mit Wandung, Boden und.oberem Abschluss, so dass ein geschlossener Innenraum umschlossen ist. Ein erstes Rohr führt in den Innenraum hinein und ein zweites Rohr führt aus dem Innenraum heraus. In dem Innenraum ist eine Filter/Trockner-Einheit angeordnet; die von dem in den Innenraum hineinführenden Rohr gespeist wird. Die Filter/Trockner-Einheit wird dabei etwa in ihrer Mitte mit Kältemittel versorgt. Die Filter/Trockner-Einheit weist zumindest einen, vorzugsweise aber mehrere großflächige Auslässe auf, deren Querschnitt den Querschnitt des speisenden Rohrs übersteigt. Die Auslässe münden in den Innenraum des Behälters, in dem sich somit sowohl Öl als auch flüssiges Kältemittel sammeln können. Das aus dem Innenraum herausführende Rohr weist ein oberes offenes Ende auf, das vorzugsweise über der Filter/Trockner-Einheit angeordnet ist. Es führt ausgehend von dieser Stelle aus dem Innenraum heraus. Dabei ist es vorzugsweise u-förmig um die Filter/Trockner-Einheit herum geführt, wobei ein unterer Rohrbogen des aus dem Innenraum herausführenden Rohrs unmittelbar über dem Boden des Gefäßes verläuft. In diesem Bereich ist vorzugsweise eine Ansaugöffnung angeordnet. Der Rohrbogen unterschneidet einen Ölspiegel, der sich in dem Gefäß ausbildet. Dadurch kann der das Gefäß verlassende Kältemittelstrom über die Ansaugöffnung dosiert Öl ansaugen und mitführen. Dies wird zur Schmierung der angeschlossenen Kompressoren gewünscht.The refrigerant collector according to the invention is based on a pressure-resistant, upright vessel with wall, bottom and .oberem conclusion, so that a closed interior is enclosed. A first tube leads into the interior and a second tube leads out of the interior. In the interior, a filter / dryer unit is arranged; fed by the tube leading into the interior becomes. The filter / dryer unit is supplied approximately in its center with refrigerant. The filter / dryer unit has at least one, but preferably a plurality of large-area outlets, whose cross section exceeds the cross section of the feeding pipe. The outlets open into the interior of the container, in which thus both oil and liquid refrigerant can collect. The tube leading out of the interior space has an upper open end, which is preferably arranged above the filter / dryer unit. It leads from this point out of the interior. In this case, it is preferably guided in a U-shape around the filter / dryer unit, wherein a lower pipe bend of the pipe leading out of the interior runs directly above the bottom of the vessel. In this area, a suction opening is preferably arranged. The pipe bend undercuts an oil level, which forms in the vessel. As a result, the refrigerant flow leaving the vessel can be metered in via the intake opening and carried along with it. This is desired for lubrication of the connected compressors.

Zwischen dem Ölspiegel und der Filter/Trockner-Einheit ist ein Teilvolumen des Innenraums begrenzt, in dem Kältemittel in flüssiger Phase vorhanden sein kann. Die flüssige Kältemittelmenge kann abhängig von Einsatzbedingungen der Kältemaschine schwanken. Die Filter/Trockner-Einheit trennt jedoch den Kältemittelspiegel von dem nach oben steil aufragenden offenen Rohrende des aus dem Innenraum herausführenden Rohrs, so dass keine Kältemittelspritzer in das offene Rohrende gelangen können, und zwar auch dann nicht, wenn der Kältemittelsammler bei Einbau in ein Kraftfahrzeug bei heftigen Fahrmanövern oder holpriger Straße geschüttelt wird.Between the oil level and the filter / dryer unit a partial volume of the interior is limited, in which refrigerant can be present in the liquid phase. The amount of liquid refrigerant may vary depending on the conditions of use of the refrigerator. However, the filter / dryer unit separates the refrigerant level from the upwardly towering open tube end of the tube leading out of the inner space, so that no splashes of refrigerant can get into the open tube end, even if the refrigerant collector when installed in a motor vehicle shaken during heavy driving maneuvers or bumpy roads.

Bei einer bevorzugten Ausführungsform ist die wandung des Gefäßes des Kältemittelsammlers zylindrisch ausgebildet, wohingegen der Boden des Gefäßes abgerundet ausgebildet ist. Letzteres hat den Vorteil, dass auch mit geringen Ölmengen ein ausreichend hoher Ölspiegel zu erzielen ist, um den Kältemittelstrom mit Öl zu versehen. Außerdem ist die Gefäßform auf diese Weise besonders druckfest.In a preferred embodiment, the wall of the vessel of the refrigerant collector is cylindrical, whereas the bottom of the vessel is rounded. The latter has the advantage that even with small amounts of oil, a sufficiently high oil level can be achieved in order to provide the refrigerant flow with oil. In addition, the vessel shape is particularly pressure-resistant in this way.

Der obere Abschluss des Gefäßes ist vorzugsweise flach oder leicht gerundet ausgebildet, wobei die beiden Rohre nebeneinander in das Gefäß hinein- sowie aus diesem herausführen. Somit ist oberhalb der Filter/Trockner-Einheit ein etwa zylindrischer Dampfdom ausgebildet, in dem Kältemittel vorwiegend in gasförmiger Phase vorhanden ist und gut abgezogen werden kann. Der Anschluss der beiden nebeneinander vorzugsweise parallel zueinander orientierten Rohre ist außerdem einfach und übersichtlich.The upper end of the vessel is preferably formed flat or slightly rounded, the two tubes side by side into the vessel and lead out of this. Thus, above the filter / dryer unit, an approximately cylindrical vapor dome is formed, in which refrigerant is predominantly in the gaseous phase and can be withdrawn well. The connection of the two side by side preferably parallel to each other oriented tubes is also simple and clear.

Vorzugsweise nimmt die Filter/Trockner-Einheit den gesamten Querschnitt des Innenraums in der Weise ein, dass sie mit der Wandung des Gefäßes lediglich einen relativ engen Ringspalt festlegt. Aus diesem Ringspalt heraus, tritt Kältemittel mit relativ geringer Strömungsgeschwindigkeit in den oberen, als Dampfdom dienenden Bereich ein. Schwappbewegungen des unterhalb der Filter/Trockner-Einheit befindlichen Kältemittelspiegels führen kaum dazu, dass flüssiges Kältemittel in den Bereich oberhalb der Filter/Trockner-Einheit gelangt. Dies erst recht nicht angesichts der bevorzugten Höhe (Axialerstreckung) der Filter/Trockner-Einheit, die vorzugsweise größer ist als der Durchmesser derselben.Preferably, the filter / dryer unit occupies the entire cross-section of the interior in such a way that it defines only a relatively narrow annular gap with the wall of the vessel. Out of this annular gap, refrigerant with a relatively low flow rate enters the upper area serving as vapor dome. Sloshing movements of the refrigerant level located below the filter / dryer unit hardly lead to liquid refrigerant reaching the area above the filter / dryer unit. This is certainly not the case in view of the preferred height (axial extent) of the filter / dryer unit, which is preferably larger than the diameter thereof.

Aus dem Ringspalt tropfen flüssiges Kältemittel und Öl nach unten ab und sammeln sich unterhalb der Filter/Trockner-Einheit. Flüssiges CO2 schwimmt dabei auf dem Ölspiegel auf.From the annular gap liquid refrigerant and oil drip down and collect below the Filter / dryer unit. Liquid CO2 floats on the oil level.

Prinzipiell ist es möglich, das sich unter der Filter/Trockner-Einheit sammelnde Öl über Kapillaren oder gesonderte Leitungen aus dem Gefäß abzuziehen und dem Ölstrom beizugeben. Das aus dem Innenraum herausführende Rohr kann somit unmittelbar aus dem oberen Dampfdombereich nach außen führen. Als einfache und robuste Lösung wird jedoch bevorzugt, das aus dem Innenraum herausführende Rohr sowohl absteigend als auch aufsteigend zwischen der Wandung und der Filter/Trockner-Einheit hindurch zu führen und somit das oben im Dampfdombereich abgesaugte Kältemittel durch den unteren Rohrbogen zu führen, wo es mit Öl versetzt wird.In principle, it is possible for the oil collecting under the filter / dryer unit to be withdrawn from the vessel via capillaries or separate lines and to be added to the oil stream. The pipe leading out of the interior can thus lead directly out of the upper steam dome area to the outside. As a simple and robust solution, however, it is preferred to guide the pipe leading out of the interior space both descending and ascending between the wall and the filter / dryer unit and thus to guide the refrigerant sucked up in the steam dome area through the lower pipe bend, where it is is mixed with oil.

Die Filter/Trockner-Einheit weist vorzugsweise ein Gehäuse mit einer flachen Oberseite und einem etwa zylindrischen Außenumfang auf. Dieses trennt auf effiziente Weise die flüssige Kältemittelphase von der dampfförmigen Kältemittelphase. Außerdem bietet es einen ausreichend großen Innenraum zur Aufnahme einer großen Trockenmittelportion.The filter / dryer unit preferably has a housing with a flat top and an approximately cylindrical outer periphery. This effectively separates the liquid refrigerant phase from the vapor refrigerant phase. In addition, it offers a sufficiently large interior to accommodate a large desiccant portion.

Es hat sich als sehr vorteilhaft herausgestellt, die Filter/Trockner-Einheit mit einem kegelförmigen Boden zu versehen. Die Spitze des Bodens liegt dabei vorzugsweise mittig in dem Gehäuse etwa unterhalb des speisenden Rohres. Der Kegelwinkel ist dabei relativ groß und liegt vorzugsweise zwischen 120° und 170°. Diese Form des Bodens hat sich sowohl hinsichtlich des sich ausbildenden Strömungsmusters als auch rein praktisch als vorteilhaft erwiesen, weil sie beim Schließen der Filter/Trockner-Einheit eine gute Kompaktierung des Trocknergranulats gestattet. Dies gilt insbesondere, wenn der Boden in das Gehäuse der Filter/Trockner-Einheit von unten her eingesetzt und dann beispielsweise durch Rastmittel fixiert wird. Das Trockengranulat wird im Wesentlichen radial durchströmt, wobei die Strömungsgeschwindigkeit gering ist und nach außen hin abnimmt. Damit wird ein inniger Kontakt zwischen Trockengranulat und Kältemittelfluid ermöglicht. Die geringe Strömungsgeschwindigkeit in dem Gehäuse der Filter/Trockner-Einheit führt zu einem niedrigen Druckabfall über dem Kältemittelsammler.It has proven to be very advantageous to provide the filter / dryer unit with a conical bottom. The tip of the bottom is preferably located centrally in the housing approximately below the feeding tube. The cone angle is relatively large and is preferably between 120 ° and 170 °. This shape of the bottom has proved to be advantageous both in terms of the forming flow pattern as well as purely practical because it allows a good compaction of the dryer granules when closing the filter / dryer unit. This is especially true when the bottom is inserted into the housing of the filter / dryer unit from below and then, for example, through Locking means is fixed. The dry granules are flowed through substantially radially, wherein the flow rate is low and decreases towards the outside. This allows intimate contact between dry granulate and refrigerant fluid. The low flow rate in the housing of the filter / dryer unit results in a low pressure drop across the refrigerant collector.

Als Trockengranulat werden vorzugsweise kugelförmige Granulatkörper verwendet, was eine optimale Berührung zwischen dem Kältemittel und dem Trockengranulat erbringt.Spherical granules are preferably used as dry granules, which provides optimum contact between the refrigerant and the dry granules.

Eingangsseitig ist die Filter/Trockner-Einheit mit einem Einlasskorb versehen, der an seinem Umfang und an seinem Boden Auslassöffnungen, z.B. Bohrungen und Schlitze aufweist. Der Einlasskorb gestattet eine Einleitung von Kältemittelfluid in das Trockengranulat mit geringem Druckabfall. An den Auslassöffnungen des Gehäuses der Filter/TrocknerEinheit ist vorzugsweise ein Feinfilter angeordnet. Dieses wird z.B. durch ein feines Edelstahlnetz, ein Edelstahlfilz oder ähnliches, gebildet. Die Maschengröße liegt vorzugsweise im Bereich von 30 µm bis 60 µm.On the inlet side, the filter / dryer unit is provided with an inlet basket having at its periphery and at its bottom outlet openings, e.g. Has holes and slots. The inlet basket allows the introduction of refrigerant fluid into the dry granulate with low pressure drop. At the outlet openings of the housing of the filter / dryer unit, a fine filter is preferably arranged. This is e.g. formed by a fine stainless steel mesh, a stainless steel felt or the like. The mesh size is preferably in the range of 30 microns to 60 microns.

Der kegelförmige Boden ist eine Voraussetzung, die zu einer guten Trennung von gasförmiger und flüssiger Phase führt. Die Ansammlung von flüssigem Kältemittel und/oder Öl in der Filter/Trockner-Einheit wird sicher vermieden. Somit wird das Trocknergranulat selbst frei von Flüssigkeiten gehalten, so dass seine Wirksamkeit nicht durch Öl oder flüssiges Kältemittel beeinträchtigt wird.The conical bottom is a prerequisite that leads to a good separation of gaseous and liquid phase. The accumulation of liquid refrigerant and / or oil in the filter / dryer unit is safely avoided. Thus, the dryer granules themselves are kept free of liquids, so that its effectiveness is not affected by oil or liquid refrigerant.

Die Auslassfenster nehmen nahezu den gesamten Außenumfang des Gehäuses der Filter/Trockner-Einheit ein. Dies führt im Weiteren zu einer effizienten Nutzung des Trockenmittels durch langsame Durchströmung sowie sicheren Austrag von flüssigem Kältemittel und Öl aus dem Gehäuse der Filter/Trockner-Einheit.The outlet windows occupy almost the entire outer circumference of the housing of the filter / dryer unit. This further leads to an efficient use of the desiccant through slow flow as well as safe discharge of liquid refrigerant and oil from the housing of the filter / dryer unit.

Weitere Einzelheiten vorteilhafter Ausführungsformen der Erfindung sind Gegenstand der Zeichnung, der Beschreibung oder von Ansprüchen.Further details of advantageous embodiments of the invention are the subject of the drawing, the description or claims.

In der Zeichnung ist ein Ausführungsbeispiel der Erfindung veranschaulicht. Es zeigen:

Figur 1
den Kältemittelsammler in einer perspektivischen Gesamtansicht,
Figur 2
den Kältemittelsammler nach Figur 1 in perspektivischer, vertikal geschnittener Darstellung,
Figur 3
den Kältemittelsammler nach Figur 2 in vertikal geschnittener Darstellung mit zusätzlicher Schnittdarstellung seiner Filter/Trockner-Einheit,
Figur 4
die Filter/Trockner-Einheit des Kältemittelsammlers nach Figur 2 und 3 in vertikal geschnittener Darstellung und
Figur 5
den Kältemittelsammler nach Figur 1 in einer ausschnittsweisen Schnittdarstellung.
In the drawing, an embodiment of the invention is illustrated. Show it:
FIG. 1
the refrigerant collector in a perspective overall view,
FIG. 2
the refrigerant collector after FIG. 1 in perspective, vertically cut representation,
FIG. 3
the refrigerant collector after FIG. 2 in a vertical sectional view with additional sectional view of its filter / dryer unit,
FIG. 4
the filter / dryer unit of the refrigerant collector after FIG. 2 and 3 in a vertical section and
FIG. 5
the refrigerant collector after FIG. 1 in a partial sectional view.

In Figur 1 ist ein Kältemittelsammler 1 veranschaulicht, dessen äußeres Gefäß 2 durch eine Aluminiumflasche gebildet wird. Diese weist eine zylindrische Wandung 3 mit einem im Wesentlichen flachen oberen Abschluss 4 und einem z.B. sphärisch gewölbten Boden 5 auf. Der Boden 5 kann mit einer Öffnung versehen sein, in die ein Berststopfen 6 eingeschraubt ist. Das Gefäß 2 ist nach außen hin allseitig geschlossen. Es kann aus zwei oder mehreren Teilen zusammengeschweißt sein, wobei die Schweißnähte in Figur 1 nicht veranschaulicht sind. Vorzugsweise ist das Gefäß 2 ohne Schweiß- und Lötnähte, d.h. ohne Schweiß- und Lötoperation ausgebildet. Dazu wird zunächst ein hohlzylindrischer Rohling erzeugt, der bereits den oberen Abschluss 4 enthält. Wenn alle später erläuterten Einbauten in dem Gefäß 2 platziert sind, wird dieses an seinen Boden 5 in einem Rollformvorgang oder in einem alternativen Umformvorgang soweit geschlossen, dass lediglich noch die.durch den Stopfen 6 zu verschließende Öffnung verbleibt. Dieses Fertigungsverfahren erlaubt es, das Gefäß 2 auch dann mit relativ geringen Wandstärken herzustellen, wenn es auf sehr hohe Berstdrücke von beispielsweise über 200 bar auszulegen ist. Sonst beim Schweißen und Löten auftretende, durch die Temperaturbeanspruchung auftretende Strukturveränderungen des Materials werden ausgeschlossen.In FIG. 1 is a refrigerant collector 1 illustrated, the outer vessel 2 is formed by an aluminum bottle. This has a cylindrical wall 3 with a substantially flat upper end 4 and a, for example, spherically curved bottom 5. The bottom 5 may be provided with an opening into which a burst plug 6 is screwed. The vessel 2 is closed on all sides to the outside. It can be welded together from two or more parts, with the welds in FIG. 1 not illustrated. Preferably, the vessel 2 without welds and solder joints, ie formed without welding and soldering operation. For this purpose, a hollow cylindrical blank is first produced which already contains the upper end 4. When all the later explained internals are placed in the vessel 2, this is closed to its bottom 5 in a roll forming process or in an alternative forming process to the extent that only the still. To be closed by the stopper 6 opening remains. This manufacturing method makes it possible to produce the vessel 2 even with relatively small wall thicknesses, if it is to be interpreted to very high bursting pressures of, for example, over 200 bar. Otherwise occurring during welding and soldering, occurring due to the temperature stress structural changes of the material are excluded.

Durch den Abschluss 4 führen zwei Rohre 7, 8 in den von dem Gefäß 2 umschlossenen, aus Figur 2 ersichtlichen Innenraum 9 hinein bzw. aus diesem heraus. Die Enden der Rohre 7, 8 durchsetzen den Abschluss 4 dabei parallel zueinander. Das Rohr 7 bildet die eingangsseitige Leitung zum Einleiten von Kältemittel in den Kältemittelsammler 1. Es führt zu einer Filter/Trockner-Einheit 10, die in dem Innenraum 9 in einem gesonderten Gehäuse 11 untergebracht ist. Das in dem Innenraum 9 angeordnete Ende 12 des Rohrs 7 führt dabei zu einem mittigen Anschluss, der an dem Gehäuse 11, d.h. genau genommen, an seiner vorzugsweise ebenen Oberseite 13 angeordnet ist. Das Gehäuse 11 weist außerdem einen etwa zylindrischen Außenumfang 14 auf, dessen Durchmesser etwas geringer ist als der Innendurchmesser der Wandung 3, so dass zwischen beiden ein Schlitz ausgebildet ist. Um diesen definiert einzustellen und das Gehäuse 11 in dem Gefäß 2 zu zentrieren, ist der Außenumfang 14 mit radial nach außen vorspringenden Abstandshalternasen 15 versehen, die vorzugsweise in Form länglicher vertikal, d.h. axial orientierter Rippen 16, 17, 18 ausgebildet sind. An dem Außenumfang 14 sind außerdem Auslassfenster 19, 20, 21, 22, 23 (siehe Figur 2 und 3) ausgebildet, die den aus Figur 3 ersichtlichen Innenraum 24 des Gehäuses 11 auf seiner gesamten Umfangsfläche zu dem Innenraum 9 des Gefäßes 3 hin öffnen. Die Auslassfenster 19 bis 23 sind voneinander lediglich durch schmale Stege getrennt, die die an der Oberseite 13 liegende obere Abschlussplatte mit einem unteren Ring 25 verbinden, der einen in das Gehäuse 11 eingsetzten Boden 26 hält. Die Auslassfenster 19 bis 23 können mit einem Kunststoffgitter versehen sein, das die eingesetzten, später erläuterten Filter abstützt und insbesondere bei der Montage vor manueller Beschädigung schützt.Through the conclusion 4 lead two tubes 7, 8 in the enclosed by the vessel 2, from FIG. 2 apparent interior 9 in and out of this. The ends of the tubes 7, 8 enforce the conclusion 4 while parallel to each other. The tube 7 forms the input-side line for introducing refrigerant into the refrigerant collector 1. It leads to a filter / dryer unit 10, which is housed in the inner space 9 in a separate housing 11. The arranged in the interior 9 end 12 of the tube 7 leads to a central terminal, which is on the housing 11, that is, in fact, arranged on its preferably flat upper side 13. The housing 11 also has an approximately cylindrical outer circumference 14, whose diameter is slightly smaller than the inner diameter of the wall 3, so that a slot is formed between the two. To set this defined and to center the housing 11 in the vessel 2, the outer periphery 14 is provided with radially outwardly projecting Abstandshalternasen 15, which are preferably in the form of elongated vertical, ie axially oriented ribs 16, 17, 18 are formed. On the outer periphery 14 are also outlet windows 19, 20, 21, 22, 23 (see FIG. 2 and 3 ) formed from the FIG. 3 apparent interior 24 of the housing 11 open on its entire peripheral surface to the interior 9 of the vessel 3 out. The outlet windows 19 to 23 are separated from each other only by narrow webs, which connect the upper end plate located on the upper side 13 with a lower ring 25 which holds a bottom 26 inserted into the housing 11. The outlet windows 19 to 23 may be provided with a plastic grid, which supports the filter used later explained and protects against manual damage, in particular during assembly.

Der Boden 26 besteht vorzugsweise, wie das übrige Gehäuse 11 auch, aus Kunststoff. Er weist einen sich von einem ringförmigen Rand 27 aufwärts erstreckenden kegelförmigen Bodenabschnitt 28 auf, der einen Kegelwinkel von vorzugsweise etwa 130° bis 150° hat. Der Boden 26 ist vorzugsweise über nicht weiter veranschaulichte Rastmittel mit dem Ring 25 verbunden. Sein äußerer Rand 29 schließt mit der Oberkante des Rings 25 ab oder ist kurz oberhalb desselben angeordnet.The bottom 26 is preferably, like the rest of the housing 11, made of plastic. It has an upwardly extending from an annular rim 27 conical bottom portion 28 which has a cone angle of preferably about 130 ° to 150 °. The bottom 26 is preferably connected to the ring 25 via latching means not further illustrated. Its outer edge 29 terminates with the upper edge of the ring 25 or is located just above it.

Die Auslassfenster 19 bis 23 sind durch ein feinmaschiges Filter geschlossen. Dieses kann beispielsweise durch ein Edelstahlnetz, einen Edelstahlfilz oder dergleichen gebildet sein. Die Maschenweite liegt vorzugsweise im Bereich zwischen 30 µm und 60 µm.The outlet windows 19 to 23 are closed by a fine mesh filter. This may be formed for example by a stainless steel mesh, a stainless steel felt or the like. The mesh size is preferably in the range between 30 microns and 60 microns.

In dem Innenraum 24 des Gehäuses 11 ist ein Einlasskorb 31 angeordnet, der mit der oberen Abschlussplatte des Gehäuses 11 vorzugsweise einstückig verbunden ist. Der Einlasskorb 31 weist beispielsweise eine zylindrische Form auf. An seinem Umfang ist er mit Schlitzen 32 versehen. In seinem Boden sind Öffnungen 33 ausgebildet. Die Schlitze 32 und Öffnungen 33 weisen vorzugsweise eine Weite von nicht mehr als 0,8 mm auf. Jedenfalls aber ist die Weite der Schlitze 32 und Öffnungen 33 geringer als die Korngröße eines Trockengranulats, das den Innenraum 24 füllt. Dieses Granulat dient der Wasserabsorption.In the interior 24 of the housing 11, an inlet basket 31 is arranged, which is preferably integrally connected to the upper end plate of the housing 11. The inlet basket 31 has, for example, a cylindrical shape. At its periphery it is provided with slots 32. In its bottom openings 33 are formed. The slits 32 and openings 33 preferably have a width of not more than 0.8 mm. In any case, however, the width of the slots 32 and openings 33 is less than the grain size of a dry granulate that fills the interior 24. This granulate serves for water absorption.

Das Gehäuse 11 weist an einander diametral gegenüber liegenden oder auch an anderweitig zueinander positionierten Stellen nutartige, vorzugsweise etwa zylinderschalenförmige Ausnehmungen auf, durch die sich das Rohr 8 erstreckt. Es geht von einem offenen, oberhalb der Filter/Trockner-Einheit 10 befindlichen Ende vertikal nach unten zu dem Boden 5 des Gefäßes 2. Der entsprechende gerade Rohrabschnitt 34 geht dann unterhalb der Filter/Trockner-Einheit 10 in einen Rohrbogen 35 über, von dem ausgehend es mit einem weiteren Rohrabschnitt 36 wieder an der Filter/Trockner-Einheit 10 vorbei zu dem Abschluss 4 und durch diesen nach außen führt. Der Rohrbogen 35 verläuft dabei knapp oberhalb des Bodens 5, wie insbesondere aus Figur 5 hervorgeht. An seiner tiefsten Stelle, an der der Rohrbogen 35 dem Boden 5 am nächsten ist, ist der Rohrbogen mit einer Saugbohrung 37 versehen. Diese weist einen geringen Durchmesser auf und dient dazu, dem in dem Rohrbogen 35 fließenden Kältemittel Öl zuzusetzen.The housing 11 has groove-like, preferably approximately cylindrical shell-shaped recesses on diametrically opposite or otherwise positioned to each other points, through which the tube 8 extends. It goes from an open, located above the filter / dryer unit 10 end vertically down to the bottom 5 of the vessel 2. The corresponding straight pipe section 34 then passes below the filter / dryer unit 10 in a pipe bend 35, of which starting with a further pipe section 36 again on the filter / dryer unit 10 over to the conclusion 4 and through this leads to the outside. The pipe bend 35 runs just above the bottom 5, as in particular from FIG. 5 evident. At its lowest point, at which the pipe bend 35 is closest to the bottom 5, the pipe bend is provided with a suction bore 37. These has a small diameter and serves to add oil to the refrigerant flowing in the pipe bend 35.

Der insoweit beschriebene Kältemittelsammler 1 arbeitet wie folgt:The refrigerant collector 1 described so far operates as follows:

In Betrieb ist das Gefäß 2 vertikal angeordnet, d.h. seine Rohre 7, 8 führen im Wesentlichen vertikal in den Innenraum 9 hinein. Die Mittelachse der zylindrischen Wandung ist senkrecht orientiert. Durch das Rohr 7 fließt Kältemittel aus einer Kältemaschine zunächst in die Filter/TrocknerEinheit, die den Innenraum 9 in einen oberen Bereich 38, der als Dampfdom dient, und einen unteren Bereich 39, der als Flüssigkeitssammler dient, unterteilt. Das Kältemittel ist in der Regel ein Dreiphasengemisch, bestehend aus gasförmigem Kältemittel, flüssigem Kältemittel und flüssigen Ölpartikeln. Es tritt zunächst in den Einlasskorb 31 ein und verlässt diesen durch die Schlitze 32 und die Öffnungen 33, durch die es in die dichte Packung der vorzugsweise kugelförmigen Trocknerkörper gelangt. Dabei wird durch die Öffnungen 32 der Bodenabschnitt 28 angeströmt, der die Strömung radial nach außen umleitet. Es ergibt sich eine relativ gleichmäßige, langsame Durchströmung der in dem Innenraum 24 gehaltenen Trocknerpackung. Flüssige Bestandteile, d.h. flüssiges Kältemittel und Öl gelangen auf den Bodenabschnitt 28 und laufen auf diesem nach außen ab. Sie verlassen die Filter/Trockner-Einheit 10 durch die Auslassfenster 19 bis 23 und rinnen dann an dem Ring 25 nach unten in den von dem Bereich 39 gebildeten Teilraum. Gasförmiges Kältemittel sammelt sich hingegen vorwiegend in dem Bereich 38 des Innenraums 9, aus dem sie über das Rohr 8 abgezogen werden.In operation, the vessel 2 is arranged vertically, i. its tubes 7, 8 lead substantially vertically into the interior 9. The central axis of the cylindrical wall is oriented vertically. Through the pipe 7, refrigerant from a refrigerator first flows into the filter / dryer unit dividing the inner space 9 into an upper area 38 serving as a steam dome and a lower area 39 serving as a liquid collector. The refrigerant is usually a three-phase mixture consisting of gaseous refrigerant, liquid refrigerant and liquid oil particles. It first enters the inlet basket 31 and leaves it through the slots 32 and the openings 33 through which it enters the dense packing of the preferably spherical dryer body. In this case, flows through the openings 32 of the bottom portion 28, which redirects the flow radially outward. This results in a relatively uniform, slow flow through the held in the interior 24 dryer pack. Liquid ingredients, i. Liquid refrigerant and oil reach the bottom portion 28 and run on this outward. They exit the filter / dryer unit 10 through the outlet windows 19 to 23 and then run down the ring 25 in the subspace formed by the area 39. Gaseous refrigerant collects, however, predominantly in the region 38 of the interior 9, from which they are withdrawn via the pipe 8.

Unter der Filter/Trockner-Einheit 10. bildet sich ein Flüssigkeitsvorrat bestehend aus Öl und flüssigem Kältemittel. Wegen der unterschiedlichen Dichten scheiden sich beide voneinander. Dies gilt insbesondere, wenn als Kältemittel CO2 verwendet wird. Es bildet sich über dem Boden 5 ein Ölvolumen 40 mit einem Ölspiegel 41, auf dem ein flüssiges Kältemittelvolumen 42 mit einem Kältemittelspiegel 43 ruht. Der Ölspiegel 41 steht mindestens oberhalb der Saugbohrung 37. Der Kältemittelspiegel 43 steht mindestens unterhalb des Rands 29, vorzugsweise jedoch unterhalb des Rings 25.Under the filter / dryer unit 10 forms a liquid reservoir consisting of oil and liquid refrigerant. Because of the different densities, both divorced from each other. This is especially true when CO 2 is used as the refrigerant. It forms above the bottom 5, an oil volume 40 with an oil level 41, on which a liquid refrigerant volume 42 with a refrigerant level 43 rests. The oil level 41 is at least above the suction bore 37. The refrigerant level 43 is at least below the edge 29, but preferably below the ring 25th

Das in dem Bereich 38 vorhandene dampfförmig Kältemittel strömt durch den Rohrabschnitt 34 und den Rohrbogen 35, wobei es über die Saugbohrung 37 Öl mitnimmt. Die Saugbohrung 37 kann auch als Sickerbohrung angesehen werden, die den Ölzutritt in das Rohr 8 auf ein gewünschtes niedriges Maß beschränkt. Bedarfsweise können mehrere solcher Bohrungen vorgesehen werden. Außerdem kann zwischen dem Rohrbogen 35 und dem Berststopfen 6 ein Filter beispielsweise in Form eines Metallnetzes, Metallfilzes oder dergleichen angeordnet sein.The existing in the region 38 vapor refrigerant flows through the pipe section 34 and the pipe bend 35, where it takes along via the suction bore 37 oil. The suction bore 37 may also be considered a drainage bore, which limits the entry of oil into the tube 8 to a desired low level. If necessary, several such holes can be provided. In addition, a filter, for example in the form of a metal mesh, metal felt or the like may be arranged between the pipe bend 35 and the bursting plug 6.

Die Filter/Trockner-Einheit 10 bewirkt nicht nur eine Trocknung des Kältemittels sondern zugleich eine so wirksame Unterteilung des Innenraums 9, dass von der gegebenenfalls siedenden oder durch äußere Bewegung schwappenden Oberfläche des Kältemittelvolumens 42 keine Spritzer in das offene Ende des Rohrabschnitts 34 gelangen. Es ist auf diese Weise ein einfacher, kombinierter Kältemittelsammler mit integrierter Filter/Trockner-Einheit 10 geschaffen.The filter / dryer unit 10 causes not only a drying of the refrigerant but at the same time such an effective subdivision of the interior 9 that no splashes of the optionally boiling or sloshing by external movement surface of the refrigerant volume 42 into the open end of the pipe section 34. It is created in this way a simple, combined refrigerant collector with integrated filter / dryer unit 10.

Ein Kältemittelsammler 1 mit Filter/Trockner-Einheit 10 weist einen länglichen, vertikal orientierten Innenraum auf, der durch die Filter/Trockner-Einheit 10 in einen oberen Bereich 38 und einen unteren Bereich 39 unterteilt ist. Einströmendes Kältemittel wird über ein Rohr 7 der Filter/Trockner-Einheit 10 zugeleitet, die ihre Auslassfenster an ihrem Außenumfang hat, der mit der Wandung 3 des Gefäßes 2 des Kältemittelsammlers 1 einen relativ engen Spalt begrenzt. Flüssige Bestandteile tropfen nach unten ab und sammeln sich unterhalb der Filter/Trockner-Einheit. Gasförmige Bestandteile sammeln sich vorwiegend oberhalb der Filter/Trockner-Einheit 10.A refrigerant receiver 1 with filter / dryer unit 10 has an elongate, vertically oriented interior, which is subdivided by the filter / dryer unit 10 into an upper area 38 and a lower area 39. Inflowing refrigerant is through a pipe 7 of the Filter / dryer unit 10 which has its outlet window at its outer periphery, which defines a relatively narrow gap with the wall 3 of the vessel 2 of the refrigerant collector 1. Liquid components drip down and collect below the filter / dryer unit. Gaseous components accumulate predominantly above the filter / dryer unit 10.

Claims (19)

  1. Coolant collector (1) comprising
    a pressure-resistant upright receptacle (2) having a wall (3), a bottom (5) and an upper closure (6) which enclose an interior space (9);
    a pipe (7) leading into an interior space (9) that has an end (12) located in the interior space (9);
    a filter/dryer unit (10) that is connected to the end (12) of the pipe (7) leading into the interior space (9) and that is located with a distance to and above the bottom (5); and, a pipe (8) leading out of the interior space (9) and having an open end located in the interior space (9) above the filter/dryer unit (10), characterized in that
    the filter/dryer unit (10) has outlet windows (19, 20, 21, 22, 23) on its outer circumference.
  2. Coolant collector in accordance with Claim 1, characterized in that the pipe (8) leading out of the interior space (9) extends from its open end to a pipe bend (35) located on the bottom (5) and, ascending therefrom, from the receptacle (2), wherein the pipe bend (35) is provided with at least one suction opening (37).
  3. Coolant collector in accordance with Claim 1, characterized in that the wall (3) of the receptacle (2) is cylindrical.
  4. Coolant collector in accordance with Claim 1, characterized in that the bottom (5) of the receptacle (2) is rounded.
  5. Coolant collector in accordance with Claim 1, characterized in that the upper closure (4) of the receptacle (2) is flat, and that the two pipes (7, 8) lead next to each other into or out of the receptacle (2).
  6. Coolant collector in accordance with Claim 1, characterized in that the filter/dryer unit (10) takes up the entire cross-section of the interior space (9) and defines an annular gap with the wall.
  7. Coolant collector in accordance with Claim 1, characterized in that the pipe (8) leading out of the interior space (9) is guided - as it ascends, as well as it descends - between the wall (3) and the filter/dryer unit (10).
  8. Coolant collector in accordance with Claim 1, characterized in that the filter/dryer unit (10) comprises a housing (11) having a flat surface (13) and having an approximately cylindrical outer circumference (14), from which extend spacer projections (15) toward the wall in order to abut against said wall.
  9. Coolant collector in accordance with Claim 1, characterized in that the filter/dryer unit (10) has a conical bottom (26).
  10. Coolant collector in accordance with Claim 1, characterized in that the filter/dryer unit (10) has, on its upper side (13), a central connection which is connected to the pipe (7) that leads into the interior space (24).
  11. Coolant collector in accordance with Claim 10, characterized in that the filter/dryer unit (10) encloses a receiving space (24) in which an inlet basket (31) having inlet openings (32, 33) is arranged, said inlet basked directly adjoining the central connection.
  12. Coolant collector in accordance with Claim 11, characterized in that the inlet openings in the filter/dryer unit (10) are configured as holes (33) or as slits (32) having a width that is not greater than the grain size of the dryer granulate.
  13. Coolant collector in accordance with Claim 1, characterized in that the outlet windows (19, 20, 21, 22, 23) in the filter/dryer unit (10) take up almost the entire outer circumference of the filter/dryer unit (10).
  14. Coolant collector in accordance with Claim 1, characterized in that the outlet windows (19, 20, 21, 22, 23) of the filter/dryer unit (10) are provided with a filter (30).
  15. Coolant collector in accordance with Claim 1, characterized in that the filter (30) of the filter/dryer unit (10) consists of a fine-mesh stainless steel net.
  16. Coolant collector in accordance with Claim 1, characterized in that the filter/dryer unit (10) comprises a housing (11) made of plastic material.
  17. Coolant collector in accordance with Claim 16, characterized in that the filter/dryer unit (10) has a bottom that is locked to the remaining housing (11).
  18. Coolant collector in accordance with Claim 1, characterized in that the filter/dryer unit (10) is arranged at approximately half the height of the interior space (9) or above.
  19. Coolant collector in accordance with Claim 2, characterized in that the suction opening (37) is located on the underside of the pipe bend (35) facing the bottom (5).
EP06723160A 2005-03-01 2006-03-01 Coolant collector comprising a filter/dryer unit Not-in-force EP1853859B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005009191A DE102005009191B3 (en) 2005-03-01 2005-03-01 Refrigerant collector with filter / dryer unit
PCT/EP2006/001862 WO2006092285A2 (en) 2005-03-01 2006-03-01 Coolant collector comprising a filter/dryer unit

Publications (2)

Publication Number Publication Date
EP1853859A2 EP1853859A2 (en) 2007-11-14
EP1853859B1 true EP1853859B1 (en) 2009-07-22

Family

ID=36613382

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06723160A Not-in-force EP1853859B1 (en) 2005-03-01 2006-03-01 Coolant collector comprising a filter/dryer unit

Country Status (7)

Country Link
US (1) US20080282727A1 (en)
EP (1) EP1853859B1 (en)
CN (1) CN100538215C (en)
AT (1) ATE437345T1 (en)
DE (2) DE102005009191B3 (en)
ES (1) ES2329169T3 (en)
WO (1) WO2006092285A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008037904B4 (en) 2007-08-15 2019-07-04 Mahle International Gmbh accumulator
DE102013217072A1 (en) * 2013-08-27 2015-03-05 Behr Gmbh & Co. Kg capacitor
CN105774479B (en) * 2016-02-26 2017-12-15 佛山市国荥先达车用空调及冷却部件有限公司 Car air-conditioner drying liquid storage device
US10627141B2 (en) * 2018-03-25 2020-04-21 Shawket Bin Ayub Smart accumulator to scrub inlet fluid

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US6330810B1 (en) * 2000-08-11 2001-12-18 Showa Denko K.K. Condensing apparatus for use in a refrigeration cycle receiver-dryer used for said condensing apparatus
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AU2003229566A1 (en) * 2002-03-23 2003-10-08 Behr Gmbh And Co. Condenser
DE10221968A1 (en) * 2002-05-17 2003-11-27 Modine Mfg Co Desiccant holder

Also Published As

Publication number Publication date
WO2006092285A3 (en) 2007-09-07
EP1853859A2 (en) 2007-11-14
ATE437345T1 (en) 2009-08-15
DE102005009191B3 (en) 2006-09-07
WO2006092285A2 (en) 2006-09-08
CN100538215C (en) 2009-09-09
DE502006004303D1 (en) 2009-09-03
CN101166942A (en) 2008-04-23
ES2329169T3 (en) 2009-11-23
US20080282727A1 (en) 2008-11-20

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