EP0477612B1 - Air cooler - Google Patents

Air cooler Download PDF

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Publication number
EP0477612B1
EP0477612B1 EP91114931A EP91114931A EP0477612B1 EP 0477612 B1 EP0477612 B1 EP 0477612B1 EP 91114931 A EP91114931 A EP 91114931A EP 91114931 A EP91114931 A EP 91114931A EP 0477612 B1 EP0477612 B1 EP 0477612B1
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EP
European Patent Office
Prior art keywords
air
grid
fan
accordance
flow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP91114931A
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German (de)
French (fr)
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EP0477612A3 (en
EP0477612A2 (en
Inventor
Werner Rolles
Paul Jyrek
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Kueba Kaltetechnik GmbH
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Kueba Kaltetechnik GmbH
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Publication of EP0477612A2 publication Critical patent/EP0477612A2/en
Publication of EP0477612A3 publication Critical patent/EP0477612A3/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/081—Air-flow control members, e.g. louvres, grilles, flaps or guide plates for guiding air around a curve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
    • F24F1/0029—Axial fans

Definitions

  • the invention relates to an air cooler, consisting of a housing having an air inlet and an air outlet side, in which a lamella packet through which coolant pipes are provided, a blower driven by an electric motor, which is arranged in the flow direction of the air behind the lamella packet, and one Air guide grille attached to the air outlet.
  • a general problem with such air coolers is that a backflow or short-circuit flow occurs both around the housing and in the hub area of the fan, which greatly impairs the performance of the air cooler, in particular when the load on the fan increases with increasing union. This leads to, that more defrosting phases are required, which lead to an increase in energy consumption. In addition, an increase in the working temperature of the drive motor creates an additional load on this motor, which can result in a shortened service life.
  • An air cooler of the type mentioned at the outset has already become known (DE 38 26 588 A1), in which both the blower motor and the air guide grille are arranged behind the blower rotor as seen in the direction of flow. In a particularly advantageous manner, backflow or short-circuit flows are prevented and the thermal load on the drive motor is reduced.
  • the direction of the outlet flow is predetermined by appropriate mounting or alignment of the air cooler.
  • the aim of the invention is to provide an air cooler of the type mentioned at the outset, in which the direction of the air flow occurring on the outlet side can be easily changed within a wide range using the simplest means, particularly in the case of a fan arranged directly in the area of the air guide grille.
  • the object is achieved according to the invention in that the air baffle is subdivided into at least two baffle parts and that at least one of the baffle parts is adjustable towards the residual flow, at least in the sense of deflecting the associated outlet-side flow part.
  • the adjustment device can be implemented in a very compact and space-saving manner.
  • All the guide vane parts, or at least the larger part thereof, are preferably adjustable, the guide vane parts advantageously being able to be adjusted independently of one another in order to achieve the greatest possible variability.
  • a particularly expedient embodiment of the invention is characterized in that the guide grill parts or part thereof are adjustable in the sense of widening and / or in the sense of narrowing the flow on the outlet side.
  • Such a widening or narrowing of the cooling air flow is in particular for an adaptation rooms of different lengths and different fillings are a great advantage.
  • the lattice adjustment can be done manually or by motor, a motorized adjustment being particularly advantageous if the cooling units are difficult to access or inaccessible, as is the case, for. B. is the case with coolers mounted on high ceilings.
  • the air baffle is preferably divided into baffle parts of the same size, so that the flow portion assigned to the respectively displaced baffle part is large enough to influence the residual flow to a sufficient extent and to divert it in the desired direction.
  • the grating part it is also conceivable to choose the grating part to be adjusted or pivoted somewhat larger than the rest of the grating.
  • the air guide grille is designed as a circular disk which is preferably concentric with the blower center axis and is divided into sector-shaped guide grille parts.
  • the respectively adjustable guide grill part is preferably pivotable about a pivot axis lying in the grid plane.
  • This pivot axis can be at least adjacent to the central grid axis perpendicular to the grid plane.
  • the pivot axis preferably intersects this central grid axis.
  • the air guide grille is preferably subdivided into two guide grille parts located opposite one another, preferably each forming a semicircular disk, wherein at least one of the two guide grille parts can be pivoted about a pivot axis running at least essentially along the separating line between them.
  • the air baffle is expediently held in a collar-shaped, in particular cylindrical, air shaft, which is preferably formed by a housing attachment.
  • the blower can also be fastened, for example, by means of short and straight struts lying in front of the air guide grille in the direction of flow, which leads to a simple, inexpensive and low-vibration overall structure.
  • a housing 1 which has an air inlet side and an air outlet side, an evaporator in the form of a plate pack 2 is arranged which is penetrated by tubes carrying coolant and is equipped with a defrosting device.
  • the electric motor 6 of the blower 10 is fastened in the housing attachment 3 by means of short, straight struts 7.
  • the preferably cylindrical housing extension 3 is closed off from the outside by an air guide grille 5.
  • the air guide grille has a web mesh structure and preferably has square individual openings 8 (cf. FIG. 2).
  • This air guide grille 5 achieves a very pronounced rectification of the air flow, i.e. a parallel flow practically emerges from the air guide grille 5, the directional effect being so strong that even with a heavily loaded fan, i.e. with considerable icing, no backflow occurs around the housing 1 to the entry side.
  • the air grille 5 is essentially arranged between the fan rotor 4 and the fan motor 6 freely accessible on the downstream side. This arrangement results in a defined flow against the blower motor 6, which is also given when the blower is heavily loaded. Convection cooling of the motor 6 is obtained, which can significantly increase its service life.
  • the air baffle 5 is designed as a circular disk concentric with the center axis A of the blower and is divided into two equally sized sector-shaped light grid parts 5 ′, 5 ′′.
  • At least one of the two semicircular disk-shaped guide grid parts 5 ', 5' ' can be pivoted about a pivot axis B.
  • This pivot axis B lies in the grating plane and in the present case intersects the blower center axis A perpendicular thereto, which coincides with the grating center axis C.
  • the pivot axis B thus also coincides with the dividing line between the two semicircular disks 5 ', 5' '.
  • a respective pivotable guide grill part 5 ′, 5 ′′ has two bearing sleeves 11 through which the pivot axis B extends, which in turn is attached to the housing 1.
  • the pivot axis B can be in two parts, wherein the different axis parts can in particular be arranged on different silks of the blower motor 6.
  • pivot axis B which runs parallel to the dividing line between the two semicircular disks 5 ′, 5 ′′, is at a certain distance from this central dividing line. If, for example, both sector-shaped guide vane parts 5 ', 5' 'can be pivoted, this results in two separate pivot axes which are parallel to one another.
  • the air baffle 5 formed by the two baffle parts 5 ′, 5 ′′ has a recess 9 into which the end of the blower motor 6 facing the blower rotor 4 extends.
  • This recess may be slightly larger than that External dimensions of the blower motor 6, so that the respective guide grill part 5 ', 5''can be pivoted without any problems (cf. FIG. 1).
  • the sector-shaped guide vane part 5 '' e.g. pivoted towards the residual flow in the sense of a deflection of the assigned outlet-side flow component (cf. solid representation of part 5 ′′ in FIG. 1)
  • the overall result is a flow indicated by the solid arrows and deflected upward.
  • the flow portion of the non-pivoted guide vane part 5 ' is influenced by the flow portion of the pivoted guide vane part 5' 'in such a way that the flow portion assigned to part 5' is also deflected in the desired direction and in turn results in a targeted total flow through which despite the Deflection prevents any backflow around the housing towards the air inlet side.
  • adjustable guide grille parts or a part thereof to influence the throw range, to expand and / or to Are adjustable to narrow the outlet flow.
  • the guide vane parts in question can be adjusted manually and / or by motor.
  • programmable control of the drives is expedient.
  • the flow on the outlet side can also be influenced in a particularly advantageous manner in the desired manner in that the entire fan, including the fan rotor 4 and the fan motor 6, is preferably adjustable, including the air grille 5 in the air shaft or housing attachment 3.
  • the fan together with the air grille in the air shaft 3 is e.g. Can be displaced parallel to the shaft axis via elongated holes 16, 16 '(see FIG. 1) and / or at least pivoted about an axis perpendicular to the shaft axis.
  • Fig. 1 is also indicated by dash-dotted lines an air baffle 12, which is adjustably attached to the housing 1 to influence the outlet-side flow via slots 14 and corresponding fasteners.
  • the air baffle 12 has a section parallel to the outlet-side end face 18 of the housing 1, via which it is adjustably attached to the end face. This section is followed by a middle section of the air baffle 12, which partially surrounds the air shaft or housing section 3. An adjoining section of the air baffle 12 which is acted upon by the outflowing air is shaped in accordance with the flow deflection to be brought about.
  • the air baffle 12 is expediently rotatable about the air shaft or housing extension 3 and / or radially displaceable with respect to the air shaft.
  • the struts 7 can also be integrated in the air grille system, which is particularly useful in the case of a design made of plastic material.

Abstract

An air cooler which is equipped with an air-directing grate 5 is described. The air-directing grate 5 is divided into at least two directing-grate parts 5', 5''. At least one of the directing-grate parts 5', 5'' is pivotable at least in the sense of a deflection of the assigned outlet-side flow portion towards the residual flow. <IMAGE>

Description

Die Erfindung betrifft einen Luftkühler, bestehend aus einem eine Lufteinlaß- und eine Luftauslaßseite aufweisenden Gehäuse, in dem ein von Kühlmittel führenden Rohren durchsetztes Lamellenpaket vorgesehen ist, einem von einem Elektromotor angetriebenen Gebläse, das in Strömungsrichtung der Luft hinter dem Lamellenpaket angeordnet ist, sowie einem luftauslaßseitig angebrachten Luftleitgitter.The invention relates to an air cooler, consisting of a housing having an air inlet and an air outlet side, in which a lamella packet through which coolant pipes are provided, a blower driven by an electric motor, which is arranged in the flow direction of the air behind the lamella packet, and one Air guide grille attached to the air outlet.

Ein allgemeines Problem bei derartigen Luftkühlern ist, daß sich sowohl um das Gehäuse herum als auch im Nabenbereich des Gebläses eine Rück- bzw. Kurzschlußströmung einstellt, welche die Leistungsfähigkeit des Luftkühlers insbesondere dann stark beeinträchtigt, wenn die Belastung des Gebläses bei zunehmender Vereinsung stärker wird. Dies führt dazu, daß häufiger Abtauphasen erforderlich sind, die zu einer Erhöhung des Energieverbrauchs führen. Außerdem entsteht durch eine sich einstellende Erhöhung der Arbeitstemperatur des Antriebsmotors eine zusätzliche Belastung dieses Motors, die eine verkürzte Lebensdauer zur Folge haben kann.A general problem with such air coolers is that a backflow or short-circuit flow occurs both around the housing and in the hub area of the fan, which greatly impairs the performance of the air cooler, in particular when the load on the fan increases with increasing union. This leads to, that more defrosting phases are required, which lead to an increase in energy consumption. In addition, an increase in the working temperature of the drive motor creates an additional load on this motor, which can result in a shortened service life.

Es ist bereits ein Luftkühler der eingangs genannten Art bekannt geworden (DE 38 26 588 A1), bei dem sowohl der Gebläsemotor als auch das Luftleitgitter in Strömungsrichtung gesehen hinter dem Gebläserotor angeordnet sind. Dadurch werden in besonders vorteilhafter Weise Rück- bzw. Kurzschlußströmungen verhindert und die Wärmebelastung des Antriebsmotors reduziert.An air cooler of the type mentioned at the outset has already become known (DE 38 26 588 A1), in which both the blower motor and the air guide grille are arranged behind the blower rotor as seen in the direction of flow. In a particularly advantageous manner, backflow or short-circuit flows are prevented and the thermal load on the drive motor is reduced.

Bei einer derartigen Anordnung von Gebläse und Luftleitgitter wird die Richtung der Austrittsströmung durch entsprechende Montage bzw. Ausrichtung des Luftkühlers vorgegeben.With such an arrangement of the fan and air guide grille, the direction of the outlet flow is predetermined by appropriate mounting or alignment of the air cooler.

Ziel der Erfindung ist es, einen Luftkühler der eingangs genannten Art zu schaffen, bei dem insbesondere auch bei unmittelbar im Bereich des Luftleitgitters angeordnetem Gebläse mit einfachsten Mitteln in weiten Grenzen problemlos die Richtung der auslaßseitig auftretenden Luftströmung veränderbar ist.The aim of the invention is to provide an air cooler of the type mentioned at the outset, in which the direction of the air flow occurring on the outlet side can be easily changed within a wide range using the simplest means, particularly in the case of a fan arranged directly in the area of the air guide grille.

Die Aufgabe wird nach der Erfindung dadurch gelöst, daß das Luftleitgitter in wenigstens zwei Leitgitterteile unterteilt ist und daß wenigstens eines der Leitgitterteile zumindest im Sinne einer Ablenkung des zugeordneten auslaßseitigen Strömungsanteils zur Restströmung hin verstellbar ist.The object is achieved according to the invention in that the air baffle is subdivided into at least two baffle parts and that at least one of the baffle parts is adjustable towards the residual flow, at least in the sense of deflecting the associated outlet-side flow part.

Aufgrund dieser Ausbildung ist die Richtung der auslaßseitig auftretenden Luftströmung über einen weiten Bereich hinweg verstellbar, da durch die Ablenkung des dem verstellten Leitgitterteil zugeordneten auslaßseitigen Strömungsanteils in Richtung der Restströmung auch unmittelbar diese Restströmung beeinflußt und in die gewünschte Richtung abgelenkt wird. Dabei ist stets sichergestellt, daß jegliche Rückströmung um das Gehäuse herum zur Lufteintrittsseite hin verhindert wird.Because of this design, the direction of the air flow occurring on the outlet side can be adjusted over a wide range, since this is deflected by the deflection The flow portion assigned to the guide vane part in the direction of the residual flow also directly influences this residual flow and is deflected in the desired direction. It is always ensured that any backflow around the housing to the air inlet side is prevented.

Da bereits eine geringe Teilgitterverschwenkung eine ausgeprägte Richtungssteuerung der Gesamtströmung ermöglicht, kann die Verstelleinrichtung sehr kompakt und raumsparend realisiert werden.Since even a slight pivoting of the partial grille enables a pronounced directional control of the overall flow, the adjustment device can be implemented in a very compact and space-saving manner.

Von besonderem Vorteil ist auch, daß in Abhängigkeit von der Gitterverstellung eine Veränderung, insbesondere Verringerung der Leistung des Verdampfers durch eine Verringerung der Lüfterdrehzahl möglich ist.It is also particularly advantageous that a change, in particular a reduction in the performance of the evaporator, is possible by reducing the fan speed, depending on the grille adjustment.

Bevorzugt sind sämtliche Leitgitterteile oder zumindest der größere Teil davon verstellbar, wobei zur Erzielung einer möglichst großen Variabilität die Leitgitterteile zweckmäßigerweise unabhängig voneinader verstellbar sein können.All the guide vane parts, or at least the larger part thereof, are preferably adjustable, the guide vane parts advantageously being able to be adjusted independently of one another in order to achieve the greatest possible variability.

Eine jeweils optimale Anpassung an unterschiedliche Gegebenheiten, wie insbesondere im Falle räumlich langer oder kurzer Kühlräume sowie voller oder lediglich teilweise gefüllter Kühlräume, ist dadurch möglich, daß die Leitgitterteile bzw. ein Teil davon im Sinne einer Beeinflussung der Wurfweite der Kaltluftströmung verstellbar sind.An optimal adaptation to different circumstances, such as in particular in the case of spatially long or short cold rooms and full or only partially filled cold rooms, is possible in that the guide grill parts or part thereof are adjustable in the sense of influencing the throw of the cold air flow.

Eine besonders zweckmäßige Ausfünrungsvariante der Erfindung zeichnet sich dadurch aus, daß die Leitgitterteile bzw. ein Teil davon im Sinne einer Aufweitung und/oder im Sinne einer Verengung der auslaßseitigen Strömung verstellbar sind. Eine solche Aufweitung bzw. Verengung des Kühlluftstromes ist insbesondere wiederum für eine Anpassung an unterschiedlich lange und unterschiedlich gefüllte Räume von großem Vorteil.A particularly expedient embodiment of the invention is characterized in that the guide grill parts or part thereof are adjustable in the sense of widening and / or in the sense of narrowing the flow on the outlet side. Such a widening or narrowing of the cooling air flow is in particular for an adaptation rooms of different lengths and different fillings are a great advantage.

Die Gitterverstellung kann manuell oder motorisch erfolgen, wobei eine motorische Verstellung insbesondere dann von Vorteil ist, wenn die Kühlaggregate schlecht zugänglich oder unzugänglich sind, wie dies z. B. bei an hohen Decken montierten Kühlern der Fall ist.The lattice adjustment can be done manually or by motor, a motorized adjustment being particularly advantageous if the cooling units are difficult to access or inaccessible, as is the case, for. B. is the case with coolers mounted on high ceilings.

Das Luftleitgitter ist vorzugsweise in gleich große Leitgitterteile unterteilt, so daß der dem jeweils verstellten Leitgitterteil zugeordnete Strömungsanteil groß genug ist, auch die Restströmung in ausreichendem Maße zu beeinflußen und in die gewünschte Richtung umzulenken. Grundsätzlich ist jedoch auch denkbar, das zu verstellende bzw. zu verschwenkende Gitterteil etwas größer als den Rest des Gitters zu wählen.The air baffle is preferably divided into baffle parts of the same size, so that the flow portion assigned to the respectively displaced baffle part is large enough to influence the residual flow to a sufficient extent and to divert it in the desired direction. In principle, however, it is also conceivable to choose the grating part to be adjusted or pivoted somewhat larger than the rest of the grating.

Gemäß einer praktisch besonders zweckmäßigen Ausführungsvariante ist das Luftleitgitter als vorzugsweise zur Gebläsemittelachse konzentrische Kreisscheibe ausgebildet und in sektorförmige Leitgitterteile unterteilt.According to a practically particularly expedient embodiment variant, the air guide grille is designed as a circular disk which is preferably concentric with the blower center axis and is divided into sector-shaped guide grille parts.

Das jeweils verstellbare Leitgitterteil ist vorzugsweise um eine in der Gitterebene liegende Schwenkachse verschwenkbar. Diese Schwenkachse kann der zur Gitterebene senkrechten Gittermittelachse zumindest benachbart sein. Vorzugsweise schneidet die Schwenkachse diese Gittermittelachse.The respectively adjustable guide grill part is preferably pivotable about a pivot axis lying in the grid plane. This pivot axis can be at least adjacent to the central grid axis perpendicular to the grid plane. The pivot axis preferably intersects this central grid axis.

Bevorzugt ist das Luftleitgitter in zwei einander gegenüberliegende, vorzugsweise jeweils eine Halbkreisscheibe bildende Leitgitterteile unterteilt, wobei zumindest eines der beiden Leitgitterteile um eine zumindest im wesentlichen entlang der dazwischen liegenden Trennlinie verlaufende Schwenkachse verschwenkbar ist.The air guide grille is preferably subdivided into two guide grille parts located opposite one another, preferably each forming a semicircular disk, wherein at least one of the two guide grille parts can be pivoted about a pivot axis running at least essentially along the separating line between them.

Indem das Luftleitgitter zwischen dem Gebläserotor und dem abströmseitig frei zugänglich angebrachten Gebläsemotor angeordnet ist, wird eine gezielte Anströmung des Elektromotors erreicht, so daß auch bei zunehmender Belastung des Gebläses noch eine sehr ausgeprägte Anströmung und damit Kühlung des Motors sichergestellt ist, und zwar praktisch unabhängig von der gewählten Anströmrichtung.By arranging the air baffle between the blower rotor and the blower motor freely accessible on the outflow side, a targeted flow against the electric motor is achieved, so that even with increasing load on the blower, a very pronounced flow and thus cooling of the motor is ensured, practically independently of the selected flow direction.

Das Luftleitgitter ist zweckmäßigerweise in einem kragenförmigen, insbesondere zylindrischen Luftschacht gehaltert, der vorzugsweise durch einen Gehäuseansatz gebildet ist. In diesem Gehäuseansatz kann auch das Gebläse beispielsweise mittels in Strömungsrichtung vor dem Luftleitgitter liegender, kurzer und gerader Streben befestigt sein, was zu einem einfachen, kostengünstigen und schwingungsarmen Gesamtaufbau führt.The air baffle is expediently held in a collar-shaped, in particular cylindrical, air shaft, which is preferably formed by a housing attachment. In this housing approach, the blower can also be fastened, for example, by means of short and straight struts lying in front of the air guide grille in the direction of flow, which leads to a simple, inexpensive and low-vibration overall structure.

Das zuvor im Zusammenhang mit einem Luftkühler beschriebenen Prinzip der definierten Strömungsbeeinflussung kann grundsätzlich in gleicher Weise auch bei einer Heizvorrichtung angewandt werden.The principle of the defined flow control described above in connection with an air cooler can in principle also be applied in the same way to a heating device.

Weitere vorteilhafte Ausführungsvarianten der Erfindung sind in den Unteransprüchen angegeben.Further advantageous embodiment variants of the invention are specified in the subclaims.

Die Erfindung wird im folgenden an Hand eines Ausführungsbeispiels unter Bezugnahme auf die Zeichnung näher erläutert; in dieser zeigt:

Figur 1
eine schematische Darstellung eines Luftkühlers, und
Figur 2
ein Leitgitterteil des im Luftkühler eingesetzten Luftleitgitters.
The invention is explained below using an exemplary embodiment with reference to the drawing; in this shows:
Figure 1
a schematic representation of an air cooler, and
Figure 2
a guide grill part of the air guide grill used in the air cooler.

In einem eine Lufteinlaßseite und eine Luftauslaßseite aufweisenden Gehäuse 1 ist ein Verdampfer in Form eines Lamellenpakets 2 angeordnet, das von Kühlmittel führenden Rohren durchsetzt und mit einer Abtaueinrichtung ausgestattet ist.In a housing 1 which has an air inlet side and an air outlet side, an evaporator in the form of a plate pack 2 is arranged which is penetrated by tubes carrying coolant and is equipped with a defrosting device.

In einem abströmseitigen, zylindrischen Luftschacht, der als kragenförmiger Gehäuseansatz 3 ausgebildet ist, ist ein Gebläse 10 mit einem mehrflügeligen Rotor 4 angeordnet, der von einem Elektromotor 6 angetrieben wird. Der Elektromotor 6 des Gebläses 10 ist mittels kurzer, gerader Streben 7 im Gehäuseansatz 3 befestigt.A blower 10 with a multi-bladed rotor 4, which is driven by an electric motor 6, is arranged in a downstream, air duct, which is designed as a collar-shaped housing extension 3. The electric motor 6 of the blower 10 is fastened in the housing attachment 3 by means of short, straight struts 7.

Nach außen hin ist der vorzugsweise zylindrische Gehäuseansatz 3 durch ein Luftleitgitter 5 abgeschlossen.The preferably cylindrical housing extension 3 is closed off from the outside by an air guide grille 5.

Das Luftleitgitter besitzt eine Stegmaschenstruktur und weist vorzugsweise quadratische Einzelöffnungen 8 auf (vgl. Figur 2). Durch dieses Luftleitgitter 5 wird eine sehr ausgeprägte Gleichrichtung des Luftstroms erzielt, d.h., es tritt aus dem Luftleitgitter 5 praktisch eine Parallelströmung aus, wobei die Richtwirkung so stark ist, daß selbst bei stark belastetem Gebläse, d.h. bei erheblicher Vereisung, keinerlei Rückströmung um das Gehäuse 1 herum zur Eintrittsseite hin auftritt.The air guide grille has a web mesh structure and preferably has square individual openings 8 (cf. FIG. 2). This air guide grille 5 achieves a very pronounced rectification of the air flow, i.e. a parallel flow practically emerges from the air guide grille 5, the directional effect being so strong that even with a heavily loaded fan, i.e. with considerable icing, no backflow occurs around the housing 1 to the entry side.

Das Luftleitgitter 5 ist im wesentlichen zwischen dem Gebläserotor 4 und dem abströmseitig frei zugänglich angebrachten Gebläsemotor 6 angeordnet. Durch diese Anordnung erfolgt eine definierte Anströmung des Gebläsemotors 6, welche auch noch bei stark belastetem Gebläse gegeben ist. Man erhält eine Konvektionskühlung des Motors 6, die dessen Lebensdauer wesentlich erhöhen kann.The air grille 5 is essentially arranged between the fan rotor 4 and the fan motor 6 freely accessible on the downstream side. This arrangement results in a defined flow against the blower motor 6, which is also given when the blower is heavily loaded. Convection cooling of the motor 6 is obtained, which can significantly increase its service life.

Das Luftleitgitter 5 ist als zur Gebläsemittelachse A konzentrische Kreisscheibe ausgebildet und in zwei gleich große sektorförmige Lichtgitterteile 5', 5'' unterteilt.The air baffle 5 is designed as a circular disk concentric with the center axis A of the blower and is divided into two equally sized sector-shaped light grid parts 5 ′, 5 ″.

Zumindest eines der beiden halbkreisscheibenförmigen Leitgitterteile 5', 5'' ist um eine Schwenkachse B verschwenkbar.At least one of the two semicircular disk-shaped guide grid parts 5 ', 5' 'can be pivoted about a pivot axis B.

Diese Schwenkachse B liegt in der Gitterebene und schneidet im vorliegenden Fall die dazu senkrechte Gebläsemittelachse A, die mit der Gittermittelachse C zusammenfällt. Die Schwenkachse B fällt beim vorliegenden Ausführungsbeispiel somit auch mit der Trennlinie zwischen den beiden Halbkreisscheiben 5', 5'' zusammen.This pivot axis B lies in the grating plane and in the present case intersects the blower center axis A perpendicular thereto, which coincides with the grating center axis C. In the present exemplary embodiment, the pivot axis B thus also coincides with the dividing line between the two semicircular disks 5 ', 5' '.

Wie in Figur 2 zu erkennen ist, weist ein jeweils verschwenkbares Leitgitterteil 5', 5'' zwei Lagerhülsen 11 auf, durch die sich die Schwenkachse B erstreckt, die ihrerseits am Gehäuse 1 angebracht ist. Die Schwenkachse B kann zweiteilig sein, wobei die verschiedenen Achsteile insbesondere auf unterschiedlichen Seiden des Gebläsemotors 6 angeordnet sein können.As can be seen in FIG. 2, a respective pivotable guide grill part 5 ′, 5 ″ has two bearing sleeves 11 through which the pivot axis B extends, which in turn is attached to the housing 1. The pivot axis B can be in two parts, wherein the different axis parts can in particular be arranged on different silks of the blower motor 6.

Es ist auch denkbar, daß die parallel zur Trennlinie zwischen den beiden Halbkreisscheiben 5', 5'' verlaufende Schwenkachse B einen gewissen Abstand zu dieser zentralen Trennlinie aufweist. Sind beispielsweise beide sektorförmigen Leitgitterteile 5', 5'' verschwenkbar, so ergeben sich in diesem Falle zwei getrennte, zueinander parallele Schwenkachsen.It is also conceivable that the pivot axis B, which runs parallel to the dividing line between the two semicircular disks 5 ′, 5 ″, is at a certain distance from this central dividing line. If, for example, both sector-shaped guide vane parts 5 ', 5' 'can be pivoted, this results in two separate pivot axes which are parallel to one another.

Das durch die beiden Leitgitterteile 5', 5'' gebildete Luftleitgitter 5 weist eine Ausnehmung 9 auf, in die sich das dem Gebläserotor 4 zugewandte Ende des Gebläsemotors 6 erstreckt. Diese Ausnehmung kann ggf. etwas größer als die Außenabmessungen des Gebläsemotors 6 sein, so daß das jeweilige Leitgitterteil 5', 5'' problemlos verschwenkbar ist (vgl. Figur 1).The air baffle 5 formed by the two baffle parts 5 ′, 5 ″ has a recess 9 into which the end of the blower motor 6 facing the blower rotor 4 extends. This recess may be slightly larger than that External dimensions of the blower motor 6, so that the respective guide grill part 5 ', 5''can be pivoted without any problems (cf. FIG. 1).

Ist das halbkreisscheibenförmige Leitgitterteil 5'' zur Bildung einer ebenen Gitterscheibe mit dem gegenüberliegenden halbkreisscheibenförmigen Leitgitterteil 5' ausgerichtet (siehe gestrichelte Darstellung des Teils 5'' in Fig. 1), so ergibt sich die durch gestrichelte Pfeile angedeutete, zu den Achsen A, C parallele Luftströmung.If the semicircular disk-shaped guide grid part 5 '' is aligned with the opposite semicircular disk-shaped guide grid part 5 'to form a planar grid disk (see the dashed illustration of part 5' 'in FIG. 1), the axes A, C indicated by dashed arrows are obtained parallel air flow.

Wird dagegen das sektorförmige Leitgitterteil 5'' z.B. im Sinne einer Ablenkung des zugeordneten auslaßseitigen Strömungsanteils zur Restströmung hin verschwenkt (vgl. durchgezogene Darstellung des Teil 5'' in Fig. 1), so ergibt sich insgesamt eine mit den durchgezogenen Pfeilen angedeutete, nach oben abgelenkte Strömung. Hierbei wird der Strömungsanteil des nicht verschwenkten Leitgitterteils 5' durch den Strömungsanteil des verschwenkten Leitgitterteils 5'' so beeinflußt, daß der dem Teil 5' zugeordnete Strömungsanteil ebenfalls in die gewünschte Richtung abgelenkt wird und sich wiederum eine gezielt gerichtete Gesamtströmung ergibt, durch die trotz der Auslenkung jegliche Rückströmung um das Gehäuse herum zur Lufteintrittsseite hin verhindert wird.On the other hand, if the sector-shaped guide vane part 5 '' e.g. pivoted towards the residual flow in the sense of a deflection of the assigned outlet-side flow component (cf. solid representation of part 5 ″ in FIG. 1), the overall result is a flow indicated by the solid arrows and deflected upward. Here, the flow portion of the non-pivoted guide vane part 5 'is influenced by the flow portion of the pivoted guide vane part 5' 'in such a way that the flow portion assigned to part 5' is also deflected in the desired direction and in turn results in a targeted total flow through which despite the Deflection prevents any backflow around the housing towards the air inlet side.

Grundsätzlich ist auch denkbar, die beiden einander gegenüberliegenden Leitgitterteile 5', 5'' derart gegensinnig zu verschwenken, daß sich eine leicht divergente Strömung ergibt.In principle, it is also conceivable to pivot the two opposite guide vane parts 5 ', 5' 'in opposite directions in such a way that a slightly divergent flow results.

Häufig ist es auch zwechmäßig, wenn die verstellbaren Leitgitterteile oder ein Teil davon im Sinne einer Beeinflussung der Wurfweite, im Sinne einer Aufweitung und/oder im Sinne einer Verengung der auslaßseitigen Strömung verstellbar sind.Often it is also appropriate for the adjustable guide grille parts or a part thereof to influence the throw range, to expand and / or to Are adjustable to narrow the outlet flow.

Grundsätzlich können die betreffenden Leitgitterteile manuell und/oder motorisch verstellbar sein. Im Falle einer motorischen Verstellung ist eine programmierbare Ansteuerung der Antriebe zweckmäßig.In principle, the guide vane parts in question can be adjusted manually and / or by motor. In the case of a motorized adjustment, programmable control of the drives is expedient.

Die auslaßseitige Strömung läßt sich auf besonders vorteilhafte Weise auch dadurch in der gewünschten Weise beeinflussen, daß das gesamte, den Gebläserotor 4 sowie den Gebläsemotor 6 umfassende Gebläse vorzugsweise einschließlich des Luftleitgitters 5 im Luftschacht bzw. Gehäuseansatz 3 verstellbar ist.The flow on the outlet side can also be influenced in a particularly advantageous manner in the desired manner in that the entire fan, including the fan rotor 4 and the fan motor 6, is preferably adjustable, including the air grille 5 in the air shaft or housing attachment 3.

Hierbei ist das Gebläse zusammen mit dem Luftleitgitter im Luftschacht 3 z.B. über Langlöcher 16, 16' (vgl. Fig.1) parallel zur Schachtachse verschiebbar und/oder zumindest um eine zur Schachtachse senkrechte Achse verschwenkbar.Here, the fan together with the air grille in the air shaft 3 is e.g. Can be displaced parallel to the shaft axis via elongated holes 16, 16 '(see FIG. 1) and / or at least pivoted about an axis perpendicular to the shaft axis.

In Fig. 1 ist ferner durch strichpunktierte Linien ein Luftleitblech 12 angedeutet, das zur Beeinflussung der auslaßseitigen Strömung über Langlöcher 14 und entsprechende Befestigungsmittel verstellbar am Gehäuse 1 angebracht ist. Hierzu weist das Luftleitblech 12 einen zur auslaßseitigen Stirnfläche 18 des Gehäuses 1 parallelen Abschnitt auf, über den es verstellbar an der Stirnfläche angebracht ist. An diesen Abschitt schließt sich ein mittlerer Abschitt des Luftleibleches 12 an, der den Luftschacht bzw. Gehäuseabschnitt 3 teilweise umschließt. Ein sich daran anschließender, von der ausströmenden Luft beaufschlagter Abschnitt des Luftleitbleches 12 ist entsprechend der herbeizuführenden Strömungsablenkung geformt.In Fig. 1 is also indicated by dash-dotted lines an air baffle 12, which is adjustably attached to the housing 1 to influence the outlet-side flow via slots 14 and corresponding fasteners. For this purpose, the air baffle 12 has a section parallel to the outlet-side end face 18 of the housing 1, via which it is adjustably attached to the end face. This section is followed by a middle section of the air baffle 12, which partially surrounds the air shaft or housing section 3. An adjoining section of the air baffle 12 which is acted upon by the outflowing air is shaped in accordance with the flow deflection to be brought about.

Zur Erzielung der gewünschten Strömungsbeeinflussung ist das Luftleitblech 12 zweckmäßigerweise um den Luftschacht bzw. Gehäuseansatz 3 drehbar und/oder bezüglich des Luftschachtes radial verschiebbar.To achieve the desired flow control, the air baffle 12 is expediently rotatable about the air shaft or housing extension 3 and / or radially displaceable with respect to the air shaft.

Die Streben 7 können auch in das Luftleitgittersystem integriert sein, was sich insbesondere bei einer Ausführung aus Kunststoffmaterial anbietet.The struts 7 can also be integrated in the air grille system, which is particularly useful in the case of a design made of plastic material.

BezugszeichenlisteReference list

11
Gehäusecasing
22nd
LamellenblockSlat block
33rd
Gehäuseansatz / LuftschachtHousing attachment / air duct
44th
GebläserotorFan rotor
55
LuftleitgitterAir baffle
5'5 '
LeitgitterteilGuide grill part
5''5 ''
LeitgitterteilGuide grill part
66
GebläsemotorBlower motor
77
BefestigungsstrebenFastening struts
88th
EinzelöffnungenSingle openings
99
AusnehmungRecess
1010th
Gebläsefan
1111
LagerhülsenBearing sleeves
1212th
LuftleitblechAir baffle
1414
LanglöcherElongated holes
1616
LanglöcherElongated holes
16'16 '
LanglöcherElongated holes
1818th
StirnflächeFace
AA
GebläsemittelachseFan center axis
BB
SchwenkachseSwivel axis
CC.
GittermittelachseGrid center axis

Claims (10)

  1. Air cooler comprising a housing (1) having an air inlet side and an air outlet side, with a pack of lamella (2) through which pipes carrying a coolant being provided in the housing, a fan (10) driven by an electric motor and arranged in the direction of flow of the air behind the pack of lamella, and also an air guiding grid (5) mounted at the air inlet side,
    characterised in that
    the air guiding grid (5) is subdivided into at least two grid parts (5', 5''), and in that at least one of the guiding grid parts (5'. 5'') is adjustable at least in the sense of a deflection of the associated outlet side flow component relative to the reminder of the flow in the sense of influencing the throw range of the outlet side flow.
  2. Air cooler in accordance with claim 1, characterised in that the air grid parts (5', 5'') or a part thereof are adjustable in the sense of a broadening and/or in the sense of a narrowing of the outlet side flow.
  3. Air cooler in accordance with claim 1 or claim 2, characterised in that the air grid parts 85', 5'') are adjustable manually and/or by motor, with the motorized adjustment preferably being programmable.
  4. Air cooler in accordance with one of the claims 1 to 3, characterised in that the air guide grid (5) is preferably formed as a circular disc concentric to the central axis (A) of the fan and is subdivided into sector-like air grid parts (5', 5'').
  5. Air cooler in accordance with one of the claim 1 to 4, characterised in that the respective air guide grid (5', 5'') is pivotable about a pivot axis (B) lying in the plane of the grid, and in particular the respective guide grid part (5', 5'') is pivotable about a pivot axis (B) which is at least adjacent to the central grid axis (C) perpendicular to the plane of the grid and preferably intersects this grid central axis (C).
  6. Air cooler in accordance with one of the claims 1 to 5, characterised in that the air guide grid (5) is subdivided into two air grid parts (5', 5'') which are preferably each of semicircular disc-shape and disposed opposite to one another, and in that at least one of the two guide grid parts (5', 5'') is pivotable about a pivot axis (B) which extends at least substantially along the partition line lying between them.
  7. Air cooler in accordance with one of the claims 1 to 6, characterised in that the air guide grid (5) is arranged between the fan rotor (4) and the fan motor (6) which is freely accessibly arranged at the downstream side, with the air guide grid (5) having a cut-out (9) in which the end of the fan motor (6) adjacent the fan rotor (4) extends.
  8. Air cooler in accordance with one of the claim 1 to 7, characterised in that the air guide grid (5) is mounted in a collar-like preferably cylindrical air duct (3) which is preferably formed by a housing projection (3).
  9. Air cooler in accordance with claim 8, characterised in that the entire fan including the fan rotor (4) and also the fan motor (6) preferably including the air guide grid (5) is adjustable in the air duct (3) accommodating the fan, with in particular the fan (4, 6) being displaceable, preferably together with the air guide grid (5) in the air duct (3) parallel to the duct axis, preferably via elongate holes (16, 16') and/or is at least pivotable about an axis perpendicular to the duct axis.
  10. Air cooler in accordance one of the claims 8 and 9, characterised in that in order to influence the outlet side flow, a sheet metal air guide (12) is provided which is preferably adjustably mounted on the housing (1) via elongate holes (14), and is in particular rotatable about the air duct or the housing projection (3) and is preferably radially displaceable relative to the air duct (3).
EP91114931A 1990-09-26 1991-09-04 Air cooler Expired - Lifetime EP0477612B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4030452 1990-09-26
DE4030452A DE4030452A1 (en) 1990-09-26 1990-09-26 AIR COOLER

Publications (3)

Publication Number Publication Date
EP0477612A2 EP0477612A2 (en) 1992-04-01
EP0477612A3 EP0477612A3 (en) 1992-12-09
EP0477612B1 true EP0477612B1 (en) 1995-01-04

Family

ID=6415023

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91114931A Expired - Lifetime EP0477612B1 (en) 1990-09-26 1991-09-04 Air cooler

Country Status (7)

Country Link
EP (1) EP0477612B1 (en)
AT (1) ATE116733T1 (en)
DE (2) DE4030452A1 (en)
DK (1) DK0477612T3 (en)
ES (1) ES2069155T3 (en)
GR (1) GR3015630T3 (en)
PT (1) PT99060B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2774458B1 (en) * 1998-02-05 2000-03-03 Electricite De France REVERSIBLE HOT OR COLD AIR TRANSMITTER
DE20208250U1 (en) 2002-05-27 2003-10-02 Guentner Gmbh Hans Protection against accidental contact for fans, in particular for air coolers
DE20208554U1 (en) 2002-06-03 2003-10-16 Guentner Gmbh Hans Guide wheel for fans, in particular for air coolers
KR102076668B1 (en) * 2013-05-24 2020-02-12 엘지전자 주식회사 An indoor unit for an air conditioner
US9951791B2 (en) * 2014-08-04 2018-04-24 Samsung Electronics Co., Ltd. Air conditioner

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3826588A1 (en) * 1988-08-04 1990-02-08 Schmitz Kuehler Baierbrunn AIR COOLER

Also Published As

Publication number Publication date
DE59104137D1 (en) 1995-02-16
GR3015630T3 (en) 1995-06-30
PT99060B (en) 1999-01-29
PT99060A (en) 1993-11-30
EP0477612A3 (en) 1992-12-09
ATE116733T1 (en) 1995-01-15
EP0477612A2 (en) 1992-04-01
DE4030452A1 (en) 1992-04-02
DK0477612T3 (en) 1995-03-13
ES2069155T3 (en) 1995-05-01

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