WO2010040432A1

WO2010040432A1 - Cooler arrangement for an electrical or equipment cabinet having air-to-air heat exchanger cassettes

Info

Publication number: WO2010040432A1
Application number: PCT/EP2009/006433
Authority: WO
Inventors: Oliver Birkenstock
Original assignee: Adc Gmbh
Priority date: 2008-10-08
Filing date: 2009-09-04
Publication date: 2010-04-15
Also published as: US20110198062A1; DE102008050778B4; DE102008050778B9; EP2335462A1; DE102008050778A1

Abstract

The invention relates to a cooler arrangement (12) for an electrical or equipment cabinet (1) comprising a functional space (4) having a cross-sectional area elongated along a longitudinal axis (9), wherein devices and/or equipment generating heat during operation are disposed or can be disposed in the functional space (4), wherein the cooler arrangement (12) comprises a mounting arrangement (11), the longitudinal axis (27) thereof corresponding to the cross-sectional area, comprising a plurality of receptacles (13, 14) for alternatively receiving a closure element (47) or an air-to-air heat exchanger cassette (15, 16), wherein the air-to-air heat exchanger cassettes (15, 16) are designed such that a first fluid flow (25, 26) through the corresponding air-to-air heat exchanger cassette (15, 16) and connected to the functional space (4), and a second fluid flow (28, 29) separated from the first fluid flow (25, 26) and connected to the air surrounding the electrical or equipment cabinet (1), are formed during operation of the cooler arrangement (12) in each of the air-to-air heat exchanger cassettes (15, 16) disposed in one of the plurality of receptacles (13, 14), wherein two of the plurality of receptacles (13, 14) are designed so that the air-to-air heat exchanger cassettes (15, 16) disposed in said receptacles (13, 14) comprise outlet and/or inlet openings (22, 23) for each of the first fluid flows (25, 26) at a distance from each other along the longitudinal axis (27).

Description

Cooling arrangement for an electrical or equipment cabinet with air-to-air heat exchanger cassettes

The invention relates to a cooling arrangement for an electrical or equipment cabinet according to the preamble of patent claim 1.

The term electrical cabinet or equipment cabinet should be understood in general all types of cabinets, housings, cabins or boxes, which have a sealed at least in terms of Fluidaustauschchs interior or functional space for receiving electrical or electronic equipment and / or installations. Such electrical or electronic equipment or other installations generate waste heat during operation. In order to remove these from the interior of the functional space, cooling arrangements such as those mentioned above are used in order to avoid overheating of the devices and / or installations.

The amount of energy to be dissipated depends strongly on the devices and / or installations arranged in the functional space and their mode of operation. In addition, this depends on the ambient conditions, such as an ambient temperature, solar radiation at the installation of the electrical or equipment cabinet, etc. In order to ensure adequate heat dissipation and to minimize the entry of heat energy from the environment, known electrical or equipment cabinets are usually designed double-walled. An inner housing with inner walls and a ceiling and a floor defines the functional space. For this purpose spaced outer walls and an outer roof of the electrical or equipment cabinet form a closed outer housing. However, this often has openings to allow in a space between the inner housing, which encloses the functional space, and the outer housing, a circulation of fluids, in particular ambient air to dissipate heat via this ambient air, over the the interior sealing inner walls and / or the ceiling is discharged.

Fans are often used to form or maintain such fluid streams. These are a source of noise. Since the permissible emission limits for noise are different depending on the location of the electrical or electrical cabinet, it is necessary to heat exchange between the interior of the functional space, in particular a cooling fluid inside the functional space, in locations with low emission limits Usually air, and effectively to design the cooling fluid surrounding the functional space. For this purpose, air-air heat exchangers have been proposed in the prior art. By using an air-to-air heat exchanger in which an overall surface of the separating interface between a first fluid stream and a second fluid stream to which heat is to be transferred from the first fluid stream is or is increased, a required cooling fluid flow rate can be reduced, and thus a Fan-induced noise emission can be reduced with constant or increased heat removal performance.

During a service life of an electrical or equipment cabinet set up in the open, the devices and / or installations arranged in the functional space are frequently changed, ie replaced, supplemented, etc. Thus, when installing the electrical or equipment cabinet, the exact requirement with regard to the amount of heat to be dissipated and, if necessary even a permitted noise emission not or only insufficiently estimate. Economically, it makes no sense to design device or electrical cabinets each for a maximum possible cooling power. Rather, it makes sense to adapt these in each case to the current requirements, which in particular depends on the type and operation of the installed devices and installations. In DE 20 2006 013 162 Ul a device with air-air heat exchanger for providing cooling air for an electrical cabinet is proposed, wherein the cooling air flows through a heat exchanger cassette in a first air flow and ambient air in a second air flow and generates the two air streams by fans become. It is provided that the device has a mounting with a variable number of identical heat exchanger cassettes and a variable number of identical fans assembly unit. In the known device it is provided that the several identical heat exchanger cassettes come in the assembly unit parallel to each other to the arrangement.

Particularly in the case of elongated electrical or device barriers, different cooling requirements arise for different regions of the functional space. For example, a newly installed electrical or equipment cabinet will initially only be provided with equipment or installations in one area, which generate waste heat during operation. Another area is not populated at all or, for example, with passive distribution systems that produce little or no heat during operation. In a later assembly state, however, it may well happen that waste heat generating devices and installations are introduced into the functional area in this other area.

Even with already installed equipment cabinets that are retrofitted with new equipment and / or installations, there is often the difficulty to ensure after such assembly also an adequate heat dissipation. This is often a height that is available for a cooling arrangement is limited.

The invention is thus based on the object to provide a cooling arrangement for an electrical or equipment cabinet, which provides an improved flexible Adjustment of the cooling conditions to the respective requirements allows and preferably has a low overall height.

The object is achieved by a Kϋhlanordnung with the features of claim 1. Advantageous embodiments of the invention will become apparent from the dependent claims.

Here, a cooling arrangement for an electrical or equipment cabinet, which comprises a functional space with a longitudinal axis along an elongated cross-sectional area proposed, wherein in the functional space devices and / or devices that generate heat in their operation, are arranged or arranged, wherein the Cooling arrangement comprises a mounting arrangement, the longitudinal axis of which corresponds to the cross-sectional area of the functional space and the plurality of receptacles for each alternative receiving a closure member or an air-to-air heat exchanger cassette, wherein the air-to-air heat exchanger cassettes are designed so that during operation of the cooling arrangement in each of the air-to-air heat exchanger cassettes arranged in one of the several receptacles, a respective first fluid flow communicating with the functional space through the respective air-to-air heat exchanger cassette and one separated from the first fluid flow, with the environment Forming the air and / or equipment cabinet related second fluid flow along the longitudinal direction to transmit heat from the first fluid flow to the second fluid flow. To achieve the object, it is provided that two of the plurality of receptacles are formed such that the air-air heat exchanger cassettes arranged in these receptacles have outlet openings spaced apart from one another along the longitudinal axis and / or inlet openings for the respective first fluid streams spaced apart from one another along the longitudinal axis of the mounting arrangement , This makes it possible to form first fluid streams targeted in different areas along the longitudinal axis of the elongated cross-sectional area of the functional space. An assembly of the Cooling arrangement with air-air heat exchanger cassettes can be selected so adapted to a population of different areas along the longitudinal axis of the functional space. Only the areas in which a particularly high heat generation in operation of the installed devices and / or equipment takes place are also provided with an air-to-air heat exchanger cassette. Other areas that do not provide high heat dissipation requirements, however, do not need to be populated accordingly.

It has proven to be particularly advantageous, in particular when a plurality of adjacent regions of the functional space require good cooling, when the plurality of receptacles are arranged such that first fluid streams are formed during operation along the longitudinal axis in adjacent air-to-air heat exchanger cassettes arranged in the plurality of receptacles , which are directed parallel to the longitudinal axis opposite. That is, in the air-to-air heat exchanger cassettes disposed adjacent, the flow direction of the first fluid streams flow in opposite directions.

In such an arrangement, it is advantageous if the at least two of the plurality of receptacles are arranged such that a first fan arranged between the receptacles controls the first fluid streams or alternatively the second fluid flows through both respective air-to-air heat exchanger cassettes arranged in the adjacent ones of the plurality of receptacles can entertain or support. The cooling arrangement thus comprises in this embodiment at least one arranged between adjacent receptacles first fan.

In order to obtain a high flexibility in terms of the assembly and still require only a small number of fans, it is advantageous that the arranged between the two adjacent receptacles first fan depending on a placement situation of these recordings with Air-air heat exchanger cassettes is controlled. If, for example, only one receptacle is equipped with an air-to-air heat exchanger cassette, the first fan can be operated at a low throughput. In a particularly preferred embodiment of the invention, such a first fan arranged between two receptacles is designed as a radial fan.

Particularly preferred is an embodiment of the cooling arrangement in which the mounting arrangement is designed as a ceiling element of the functional space. The mounting arrangement is designed so that it hermetically seals the functional space of the electrical or equipment cabinet upwards. As a result, a dust and moisture resistance of the functional space is fully guaranteed within the framework of the selected IP protection level. In addition, optimal heat dissipation and control of the first fluid flows in the functional space is possible. The air heated in the functional space (interior) of the inner housing rises to the top. On the ceiling of the functional space thus occur at the highest temperatures of the interior limiting surfaces. A cooling arrangement can thus be configured particularly effectively on the ceiling or as a ceiling element.

The inner housing has in preferred device or electrical cabinets made of profiles frame, which is usually planked from the outside. The planking with interior walls and a ceiling is done so that the interior is sealed against dirt, moisture and a fluid exchange. In a preferred embodiment, in which the cooling arrangement is designed as a ceiling element, the mounting frame has a peripheral bearing surface, which can be fastened on the frame.

As a rule, electrical or equipment cabinets have a functional space with a rectangular, elongated rectangular shape along the longitudinal axis of the cross section. In a preferred Embodiment thus has the mounting arrangement on a circumferential rectangular elongated support surface and are the outlet openings facing in the adjacent of the plurality of receptacles air-to-air heat exchanger cassettes opposite short end faces of the rectangular support surface facing. The support surface is formed so that it can be placed on the frame formed from profiles of the functional space and fastened with fastening means. In order to ensure a seal with respect to dust and moisture as well as a fluid exchange, peripheral seals may be incorporated in the frame or frame profiles of the functional space. Alternatively, these seals can be integrated on or in the bearing surface of the mounting arrangement.

If the outlet openings of the air-air heat exchanger cassettes arranged in the adjacent ones of the several receptacles point to the opposite short end sides of the rectangular cross-sectional area of the functional space, this offers the possibility of forming different first fluid streams in the interior of the functional space, preferably along side walls of the functional space , which are arranged on the short end faces of the cross-sectional surface of the functional space, are directed downward. Air of the first fluid streams heated by the devices and installations in the functional space is sucked in the middle between the air-air heat exchanger cassettes arranged in adjacent receptacles and fed via baffles to the inlet openings of the air-air heat exchanger cassettes. Such an arrangement has the advantage that even with a failure of a fan between the air-air heat exchanger cassettes, the first fluid flows are maintained as circulation, since the outer functional space limiting side walls by ambient air from the outside, between the functional space wall and an outer Housing penetrates, to be cooled. Thus, a downward flow of air is found in the interior of the functional space adjacent to the Function space side walls instead. The heated air rises in the interior, preferably in the middle of the functional space up and enters the air-to-air heat exchanger cassettes.

In a preferred embodiment, the air-air heat exchanger cassettes have vertically oriented and parallel to the longitudinal axis of the mounting arrangement oriented channels which are traversed horizontally transversely to the transverse axis alternately by one of the first fluid streams and one of the second fluid streams. As a result, a particularly optimal heat transfer is ensured even if, for example, the fan that maintains the first fluid flows, fails. Preferably, the receptacles and the air-to-air heat exchanger cassettes are configured such that the channels of the air-to-air heat exchanger cassettes discharged from the second fluid streams, i. the ambient air, are flowed through, at least at one end face of the channels directly adjacent to the functional space or at least with a boundary surface of the functional space in thermal contact. Even if the first fluid streams wholly or partially come to a halt in the channels of the air-air heat exchanger, in such an embodiment, at least a reduced heat dissipation through these end faces of the channels of the air-to-air heat exchanger, which are flowed through by the second fluid streams ,

In order to excite and / or maintain the second fluid streams, second fans, which in each case drive or support one of the second fluid streams, are preferably oriented on the longitudinal axis of the mounting arrangement at opposite ends of the air-to-air heat exchanger cassettes arranged in adjacent receptacles. The second fans are preferably radial fans.

To ensure a flat tree shape while still absorbing ambient air through openings in vertical side walls of the exterior Housing or via openings in vertical side surfaces of the outer roof flows into a space between the inner housing and the outer housing to improve, the second fan are mounted tilted in a preferred embodiment relative to a horizontal mounting position. Upwards, ie towards the outer roof, facing ends of the axes of rotation are measured along the longitudinal axis of the mounting arrangement farther away from the receptacle than the downwardly, facing the interior ends of the axes of rotation. The axes of rotation of the second fan are thus not oriented vertically. The upper ends of the axes of rotation of two adjacent images associated with the second fan are tilted in the opposite direction from the vertical. The easiest way to realize the tilt, are used in the different high mounting posts. The higher supports are facing the receptacle, the lower supports facing away from the receptacle. From the opposite side can thus be sucked improved ambient air in the radial fan.

In order nevertheless to achieve a flat design, the mounting arrangement preferably has depressions which are formed or arranged (in operation) under the bearing surface of the mounting arrangement or below a plane in which the air-to-air heat exchanger cassettes are arranged. The depressions are preferably trough-shaped. In electrical or equipment cabinets comprising a scaffold made of profiles, these recesses are preferably adapted so that the depth dimensions of the recesses do not exceed a profile thickness of the profiles.

First fans that suck in the interior or functional space heated cooling fluid and promote in the air or the air heat exchanger cassettes are preferably arranged in an increase relative to a support surface of the mounting frame or a support surface of the air-to-air heat exchanger cassettes. Such a first fan is as Radial fan formed in the bottom of the interior, possibly by a grid to avoid unintentional interference with the first fan during operation during maintenance, flows in the interior heated cooling fluid and the side of the air or air heat exchanger cassettes is supplied. An axis of rotation of the radial fan designed as the first fan is thus aligned vertically in operation.

In order to protect the cooling arrangement against external influences, in one embodiment the cooling arrangement comprises an outer roof which closes off the electrical cabinet or equipment cabinet at the top, the air-to-air heat exchanger cassettes and the closure elements, which can alternatively be used, being adapted to the outer roof in that they prevent buckling of the outer roof in the case of forces acting on the outer roof from above and outside. Thus, the operation of the cooling arrangement is always ensured. The air-to-air heat exchanger cassettes and the closure elements are thus designed structurally stable so that they can support the outer roof. In this way, it can be achieved that an outer roof can be reduced in terms of its strength and part of the structural stability of the outer roof is taken over by the air-air heat exchanger cassettes or, alternatively, closure elements used in the receptacles. Particularly preferably, the cooling arrangement forms a roof module with the outer roof.

The first and second fans are preferably designed as radial fans. In this way, a flat design of the cooling arrangement or an outer roof arranged thereover can be achieved.

In order to optimally design an air supply to the inlet of the air-air heat exchanger cassettes, in a preferred embodiment, the fans are each surrounded by guide elements, which suck the air sucked in by the fans into and / or the corresponding channels of the air-to-air heat exchanger cassettes.

The outer roof and / or the side walls of the outer housing are preferably formed in vertical sections with openings referred to as gills, to allow ingress and outflow of the fluid of the second fluid streams.

All fans, i. One or more first fans, which are arranged in the functional space, and second fans, which drive second fluid streams of ambient air, are in a preferred embodiment driven and / or controlled via a common control device facing the functional space. This offers the advantage that power can be supplied via the control device via connection lines in the interior of the functional space. To the individual second fans, which are mounted on the side facing away from the functional space side of the mounting arrangement, sealed executed connection cables are formed with connectors. Depending on requirements, so second fans for driving the second fluid streams can be easily attached to the mounting arrangement and supplied with electrical energy.

The air-air heat exchanger cassettes are designed so that in each case an inflow region of the air-air heat exchanger cassettes is separated from a discharge area in cooperation with the outer roof. This prevents heated ambient air exiting an air-to-air heat exchanger cassette from re-entering the same or an adjacent air-to-air heat exchanger cassette. This ensures optimum cooling performance at all times. In the air-air heat exchanger cassettes flows as a second cooling fluid only cool, not yet heated ambient air. In a preferred embodiment, the plurality of receptacles are two receptacles which are designed so that in an arrangement of two identical air-air heat exchanger cassettes in the two receptacles, the first fluid streams in the functional space form so that they cool different areas of the functional space.

The fans used are each arranged in front of inlet openings of the air-air heat exchanger cassettes and blow the respective fluid streams into the air-air heat exchanger cassettes.

The invention will be explained in more detail in connection with a drawing. Hereby show:

Fig. 1 is a schematic representation of a device cabinet with a

Cooling arrangement;

Fig. 2 is an exploded view of a cooling arrangement with a

Heat exchanger cassette and a closure plate; and

3 shows a schematic view of a cooling arrangement with two heat exchanger cassettes arranged adjacent to one another.

In Fig. 1, a device cabinet 1 is shown schematically. This is preferably designed double-walled. However, other embodiments may be formed single-walled. The equipment cabinet thus comprises an outer housing 2, which surrounds an inner housing 3, which encloses a functional space 4, spaced. The inner housing 3 is arranged on a base 5, which may be completely or partially embedded in the ground. In other embodiments, the base is not recessed into the ground. In a preferred embodiment, the inner housing 3 has a frame 6 which consists of individual profiles 7 fastened to each other and preferably screwed together. The frame 6 is planked on the sides with functional space side walls 8. The equipment cabinet 1 has an elongate cross-sectional shape along a longitudinal axis 9, preferably a rectangular cross-sectional shape. The functional space side walls 8 thus preferably comprise short end faces 8a and a longitudinal side wall which is often referred to as the rear wall 8b. A viewer facing the front longitudinal side wall (not shown) is preferably formed as a door. Also to the base, ie down, the functional space is dust and fluid-tight and thus sealed moisture-proof. In a bottom 10, which seals the functional space down, preferably sealed bushings for power, data lines, fiber optic cables, etc. are formed. At the top, the functional space 4 is sealed by a mounting arrangement 11 of a cooling arrangement 12. For this purpose, the mounting assembly 11 is formed so that it forms a bearing surface 46 which rests on the profiles 7 of the frame 6 and the functional space 4 hermetically sealed dust and fluid-tight. Here, individual components of the cooling arrangement in the functional space 4 "penetrate" or "protrude". This means that they are arranged in operation below the support surface 46. The mounting arrangement 11 of the cooling arrangement 12 is designed such that it can be fastened and locked on the frame 6 with the aid of fastening means. Suitable fasteners are those known in the art fastening means into consideration. For example, the mounting arrangement can be screwed to the frame 6.

The mounting arrangement 11 comprises two receptacles 13, 14, in which air-air heat exchanger cassettes 15, 16 are arranged. These are arranged in the receptacles 13, 14 so that penetration of fluid and / or dust into the functional space or from the functional space is impossible. In addition to the air-air heat exchanger cassettes 15, 16, the cooling arrangement 12 on a side facing the functional space 4 side 17 preferably designed as a radial fan first fan 18. The first fan 18 is disposed in a survey 48 of the mounting assembly 11. The survey is arranged in operation above the support surface 46. Around the fan, a first guide plate 19 is arranged, which in the radial fan entering, heated in the functional space 4 first fluid 20, 21 through inlet openings 22, 23 of the air-to-air heat exchanger cassettes 15, 16 supplies. In the air-air heat exchanger cassettes 15, 16 thus first fluid flows 25, 26 are formed, which are directed parallel to the longitudinal axis 9 and a longitudinal axis 27 of the mounting arrangement in opposite directions. The first fluid streams 25, 26 are driven by the first fan 18 through parallel to the longitudinal and vertically extending channels of the air-to-air heat exchanger cassettes 15, 16. In the opposite direction, the air-to-air heat exchanger cassettes 15, 16 by second fluid streams 28, 29 flows through. These are driven by second fans 30, 31, which are preferably also designed as radial fans. The second fan 30, 31 are bevelled mounted so that an influx of ambient air into the fan 30, 31 is facilitated. About the radial fans further baffles 32, 33 are arranged, which supply the air to the other inlet openings 34, 35 of the air-to-air heat exchanger cassettes 15, 16. The further baffles 32, 33 have openings 61 which are aligned with inflow regions of the second fans 30, 31 designed as radial fans. The cooling fluid of the second fluid streams 28, 29 is ambient air entering and exiting through gated slit openings 36 in an outer roof 37 into the outer housing. The outer roof 37 has ribs 38 which adjoin the air-to-air heat exchanger cassettes 15, 16 in order to separate inlet regions 39, 40 from a central outlet region 41 in the roof region. This prevents that already heated ambient air is sucked into the second fluid flow again and passed through the air-air heat exchanger cassettes 15, 16. The first fan 18 and the second fan 30, 31 are supplied and regulated by a common control device 42 with electrical energy. The control device 42 is mounted on the functional space facing side 17 of the mounting assembly 11.

In the illustrated embodiment, substantially separate first fluid streams 25, 26 are formed in the functional space 4 in separate areas 43 and 44. Interior air cooled in the air-air heat exchanger cassettes 15, 16 flows downwards along the short end walls 8a of the functional space 4 and then rises from the floor 10 of the functional space 4 along the devices and installations (not shown) mounted in the functional space 4, and thereby passes through the waste heat of these devices and / or installations heated. By the first fan 18, the heated indoor air, which has risen to the ceiling of the functional space 4, sucked and pressed into the air-air heat exchanger cassettes 15, 16. There, the heated air of the functional space 4, the heat through the boundary walls of the adjacent channels from the ambient air of the second fluid streams 28, 29, which are heated in the air-to-air heat exchanger cassettes 15, 16 and then from the central outlet area 41 through the Outlet 37 flow out.

In addition to the fluid flows just described, further fluid flows may form, particularly between functional space with walls 8, i. of the inner housing 3, and the walls of the outer housing 2.

FIG. 2 shows a schematic exploded view of an embodiment of a cooling arrangement. Same technical features are provided with identical reference numerals. The mounting arrangement 11 has a substantially elongated rectangular shape. All around is one also formed substantially rectangular support surface 46. This is provided to hang on profiles 7 of a frame 6 of a functional space 4 (see Fig. 1). For example, passage openings are provided in the encircling support surface 46 in order to receive fastening elements which, for example, are latched and / or screwed into grooves in the profiles. The mounting arrangement 11 has two receptacles 13, 14, which are designed for receiving an air-to-air heat exchanger cassette 15 or a closure element 47. Between the receptacles 13, 14, a first fan (not shown), which is designed as a radial fan, is arranged, which is covered at the top by a box-like increase 48, which can also be referred to as a cover of the mounting arrangement. The box-like elevation 48 has openings 51, 52 to the receptacles 13, 14. These openings 51, 52 may adjoin an inlet opening 22 of the air-to-air heat exchanger cassette 15 or the closure element 47. Each of the receptacles 13, 14 additionally has a further passage opening 53, 54 which is open to the functional space and adjoins the outlet opening 55 of the air-to-air heat exchanger cassette 15 or the closure element 47. Both the air-to-air heat exchanger cassette 15 and the closure member 47 are attached to the mounting assembly 11 so that the openings 51-54 are sealed fluid-tight. By the air-air heat exchanger cassette 15, which is arranged on the receptacle 13, thus sucked from below through the first fan air of a functional space through the opening 51 of the cover exit and enter the inlet opening 22 of the air-to-air heat exchanger cassette 15 and through the opening 53 from the air-to-air heat exchanger cassette 15 out into the functional space. The openings 52 and 54 associated with the receptacle 14 are sealed by the closure member 47.

In order to drive the second fluid flow through the air-air heat exchanger cassette 15, a second fan 30 designed as a radial fan is provided in a trough-like depression 56 of the mounting arrangement 11 arranged. This is arranged on a fan bracket with unequal length or differently angled supports 57, 58, so that it is arranged bevelled to a short side edge 60 of the mounting assembly 11. A profiled further baffle 32 is disposed over the second fan 30 and ensures that ambient air flowing through a circular opening 61 in the further baffle 32, which is sucked in by the second fan 30, is directed into the air-to-air heat exchanger cassette 15.

As can be clearly seen, an identically formed air-air heat exchanger cassette can be arranged in the second receptacle 14 as an alternative to the closure element 47. Likewise, it is possible to fasten in another trough-like depression 62 a further bevelled second fan and to position an additional further guide plate here similar to the further guide plate 32. The further baffles can be profiled identically.

In Fig. 3, such an arrangement is shown schematically, in which two air-to-air heat exchanger cassettes 15, 16 are arranged in the mounting arrangement 11. Schematically indicated are the alternately arranged channels 63, which are alternately flowed through by the first fluid flow and the second fluid flow in the opposite direction in order to transfer heat from the first cooling fluid flow to the second cooling fluid flow via the vertical partition walls 64 of the channels.

The channels 63 are each oriented along the longitudinal direction 27 of the cooling arrangement 11. The vertical walls 64 separate the individual channels 63, which are alternately flowed through in a horizontal direction transverse to the longitudinal direction 27 alternately by the first fluid flow and the second fluid flow in the opposite direction. Lower horizontal walls 65 of the channels 63 preferably directly adjoin the functional space of the inner housing or are in thermal contact with the functional space via a support surface 66 of the mounting arrangement 11 (see Fig. 2). Thus, even if the first fan fails, at least a reduced cooling of the functional space is ensured.

A control device, which is arranged on the side facing the functional space of the mounting arrangement, is preferably designed such that it supplies and controls the first fan and the second fan with electrical energy. In this case, the controller is preferably designed such that a number of revolutions of the first fan, which sucks in heated air from the functional space, is determined as a function of the population of the adjacent receptacles. If only one receptacle is occupied by an air-to-air heat exchanger, then a lower speed is requested from the first fan with otherwise identical further ambient parameters than when both receptacles are equipped with an air-to-air heat exchanger cassette.

The embodiment described is merely exemplary in nature. In other embodiments, further receptacles may be provided along the longitudinal axis of the mounting arrangement. This makes it possible to provide further along the longitudinal axis adjacent areas of the functional space with a separate cooling air supply. Due to the fact that cooling air enters the functional space at different points along the longitudinal axis, different cooling flows to devices and devices, which require special cooling, can be guided via guide plates mounted in the interior of the functional space. Other areas of the interior, which may not require special cooling, can be largely separated by baffles (not shown), so that an effective circulation of the indoor air in takes place in the area where the heat takes place through the built-in appliances and installations.

LIST OF REFERENCE NUMBERS

1 appliance cabinet

2 outer casing

3 inner housing

function room

5 sockets

frame

profiles

Function space side wall a End sides b Rear wall

longitudinal axis

10 bottom 1 mounting arrangement 2 cooling arrangement 3, 14 receptacles 5, 16 air-air heat exchanger cassettes 7 the functional space facing side 8 first fan 9 first baffle 0, 21 first cooling fluid 2, 23 inlet openings 5, 26 first fluid streams 7 longitudinal axis of the mounting assembly 8, 29 second fluid streams 0, 31 second fan 2, 33 further baffles 4, 35 more inlet openings 6 openings 7 outer roof 8 ribs , 40 inlet area (inflow area)

Outlet area (outflow area)

Control device, 44 areas

bearing surface

closure element

Survey -54 openings

Outlet opening trough-like recess, 58 supports

Fan holder short side edge circular opening further trough-like depression

Channels vertical partitions lower horizontal walls

bearing surface

Claims

claims

1. Cooling arrangement (12) for an electrical or equipment cabinet (1) comprising a functional space (4) with an along a longitudinal axis (9) elongated cross-sectional area, wherein in the functional space (4) devices and / or facilities at generating, disposable, or arranged waste heat, the cooling arrangement (12) comprising a mounting arrangement (11) whose longitudinal axis (27) corresponds to that of the cross-sectional area and the plurality of receptacles (13, 14) for alternately receiving a closure element (11). 47) or an air-to-air heat exchanger cassette (15, 16), wherein the air-to-air heat exchanger cassettes (15, 16) are designed so that in operation of the cooling arrangement (12) in each of the in one of the plurality of receptacles ( 13, 14) arranged air-air heat exchanger cassettes (15, 16) each one with the functional space (4) in communication standing first fluid flow (25, 26) through the respective air-air heat exchanger cassette (15 , 16) and each form a second fluid flow (28, 29) along the longitudinal axis (27), separate from the first fluid flow and communicating with ambient air of the electrical or instrument cabinet (1), to move from the first fluid flow (25, 26). Heat to the second fluid stream (28, 29) to transmit, characterized in that two of the plurality of receptacles (13, 14) are formed so that in these receptacles (13, 14) arranged air-air heat exchanger cassettes (15, 16 ) along the longitudinal axis (27) spaced apart outlet openings and / or along the longitudinal axis (27) spaced apart inlet openings (22, 23) for the respective first fluid streams (25, 26).

Second cooling arrangement (12) for an electrical or equipment cabinet (1) according to claim 1, characterized in that the plurality of receptacles (13, 14) are arranged so that in operation in along the longitudinal axis (27) in adjacent of the plurality Receivers (13, 14) arranged air-air heat exchanger cassettes (15, 16) each form first fluid streams (25, 26) which are directed in opposite directions parallel to the longitudinal axis (27).

3. cooling arrangement (12) for an electrical or equipment cabinet (1) according to claim 1 or 2, characterized in that at least two adjacent of the plurality of receptacles (13, 14) are arranged on that one between the receptacles (13, 14 ) arranged first fan (18) the first fluid streams (25, 26) or alternatively the second fluid streams (28, 29) through both respective in the adjacent of the plurality of receptacles (13, 14) arranged air-air heat exchanger cassettes (15, 16) can entertain or support.

4. Cooling arrangement (12) for an electrical or equipment cabinet (1) according to one of the preceding claims, characterized in that between the two adjacent receptacles (13, 14) arranged first fan (18) in dependence on an assembly situation of these recordings ( 13, 14) with air-air heat exchanger cassettes (15, 16) is driven.

5. Cooling arrangement (12) for an electrical or equipment cabinet (1) according to one of the preceding claims, characterized in that the mounting arrangement (11) is designed as a ceiling element of the functional space (4).

6. cooling arrangement (12) for an electrical or equipment cabinet (1) according to one of the preceding claims, characterized in that the mounting arrangement (11) has a peripheral bearing surface (46).

7. Cooling arrangement (12) for an electrical or equipment cabinet (1) according to one of the preceding claims, characterized in that the air-air heat exchanger cassettes (15, 16) parallel to the longitudinal axis (27) oriented channels having horizontally across Longitudinal axis (27) are alternately flowed through by one of the first fluid streams (25, 26) and one of the second fluid streams (28, 29).

8. cooling arrangement (12) for an electrical or equipment cabinet (1) according to one of the preceding claims, characterized in that oriented on the longitudinal axis (27) of the mounting arrangement (11) at opposite ends of the adjacent in the plurality of receptacles (13, 14) arranged air-air heat exchanger cassettes (15, 16) second fan (30, 31) are arranged, each of which drive or support one of the second fluid streams (28, 29).

9. cooling arrangement (12) for an electrical or equipment cabinet (1) according to one of the preceding claims, characterized in that the cooling arrangement (12) comprises an outer roof (37) which closes the electrical cabinet or equipment cabinet (1) above, wherein the Air-to-air heat exchanger cassettes (15, 16) and the closure elements (47) adapted to the outer roof (37) are formed so as to prevent buckling of the outer roof (37) in acting from above and outside on the outer roof (37) forces ,

10. cooling arrangement (12) for an electrical or equipment cabinet (1) according to one of the preceding claims, characterized in that the first and second fans (18, 30, 31) are each radial fans.

11. A cooling arrangement (12) for an electrical or equipment cabinet (1) according to one of the preceding claims, characterized in that the fans (18, 30, 31) are each surrounded by guide elements, which of directing the fans (18, 30, 31) sucked air into the and / or the corresponding channels of the air-to-air heat exchanger cassettes (15, 16).

12. A cooling arrangement (12) for an electrical or equipment cabinet (1) according to any one of the preceding claims, characterized in that the outer roof (37) gills, to an inflow and outflow of the fluid of the second fluid streams (28, 29) enable.

13. Cooling arrangement (12) for an electrical or equipment cabinet (1) according to one of the preceding claims, characterized in that the fans (18, 30, 31) via a the functional space (4) facing common control device (42) driven and controlled become.

14. Cooling arrangement (12) for an electrical or equipment cabinet (1) according to one of the preceding claims, characterized in that the air-air heat exchanger cassettes (15, 16) in cooperation with the outer roof (37) each have an inflow region (39, 40) of the air-to-air heat exchanger cassettes (15, 15) from a discharge area (41).

15. A cooling arrangement (12) for an electrical or equipment cabinet (1) according to any one of the preceding claims, characterized in that the plurality of receptacles (13, 14) are two receptacles which are formed so that in an arrangement of two identical Air-air heat exchanger cassettes (15, 16) in the two receptacles (13, 14), the first fluid streams (25, 26) in the functional space (4) form so that these along the longitudinal axis (27) adjacent areas (43 , 44) of the functional space (4) cool.

16, cooling arrangement (12) for an electrical or equipment cabinet (1) according to one of the preceding claims, characterized in that the Fans (18, 30, 31) respectively in front of inlet openings (22, 23) of the air-to-air heat exchanger cassettes (15, 16) are arranged and the respective fluid streams (25, 26, 28, 29) in the air-to-air heat exchanger cassettes ( 15, 16).