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

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

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Publication number
WO2010040432A1
WO2010040432A1 PCT/EP2009/006433 EP2009006433W WO2010040432A1 WO 2010040432 A1 WO2010040432 A1 WO 2010040432A1 EP 2009006433 W EP2009006433 W EP 2009006433W WO 2010040432 A1 WO2010040432 A1 WO 2010040432A1
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WO
WIPO (PCT)
Prior art keywords
air
heat exchanger
receptacles
air heat
equipment cabinet
Prior art date
Application number
PCT/EP2009/006433
Other languages
German (de)
French (fr)
Inventor
Oliver Birkenstock
Original Assignee
Adc Gmbh
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to DE102008050778.4 priority Critical
Priority to DE102008050778A priority patent/DE102008050778B9/en
Application filed by Adc Gmbh filed Critical Adc Gmbh
Publication of WO2010040432A1 publication Critical patent/WO2010040432A1/en

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Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00Constructional details common to different types of electric apparatus
    • H05K7/20Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20536Modifications to facilitate cooling, ventilating, or heating for racks or cabinets of standardized dimensions, e.g. 19-inch electronic racks
    • H05K7/206Air circulating in closed loop within cabinets wherein heat is removed through air-to-air heat-exchanger

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 electric or appliance cabinet with air-to-air heat exchanger cassettes

  
The invention relates to a cooling arrangement for an electric 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 environmental conditions, such as an ambient temperature, solar radiation at the site of the electrical or equipment cabinet, etc. In order to ensure adequate heat dissipation and to keep low an entry of heat energy from the environment, known electric 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 electric or appliance 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, via the interior walls sealing the interior and / or the blanket is dispensed.

  
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, usually air , And to effectively 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 fan-induced noise emissions be reduced at constant or increased heat removal performance.

  
During a service life of an outdoor or electrical cabinet, the devices and / or installations located in the functional space are frequently changed, i. exchanged, supplemented, etc. Thus, the exact requirement in terms of the amount of heat to be dissipated and possibly also a permitted noise emission is not or only inadequately assessed in a list of Elektrooder equipment cabinet. Economically, it makes no sense to design equipment or electrical cabinets each for a maximum possible cooling performance. 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-to-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 the two air streams are generated by fans. 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 areas of the functional space. For example, a newly installed electric or appliance cabinet is initially provided only in one area with equipment or installations that 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 therefore based on the object to provide a cooling arrangement for an electric or equipment cabinet, which allows an improved flexible adaptation of the cooling conditions to the respective requirements and preferably has a low overall height.

  
The object is achieved according to the invention by means of a cooling system with the features of patent claim 1. Advantageous embodiments of the invention will become apparent from the dependent claims.

  
Here, a cooling arrangement for an electric 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 during their operation, are arranged or arranged, wherein the cooling arrangement a A mounting arrangement comprises, whose longitudinal axis 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-air heat exchanger cassettes are formed so

   that, during operation of the cooling arrangement, in each of the air-air heat exchanger cassettes arranged in one of the several receptacles, a first fluid flow communicating with the functional space is separated by the respective air-air heat exchanger cassette and one separated from the first fluid flow by the ambient air of the electric / or device cabinet communicating second fluid flow along the longitudinal direction to transfer 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 designed 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 thus be selected adapted to a placement 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 exchange 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 first fan arranged between the two adjacent receptacles is controlled in dependence on an equipping situation of these receptacles with air-air heat exchanger cassettes. 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-tightness 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.

  
In the case of preferred devices or electrical cabinets, the inner housing has a frame made of profiles, 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.

  
In general, electrical or equipment cabinets have a functional space with a rectangular, elongated along the longitudinal axis of the cross-section rectangular shape. In a preferred embodiment, therefore, the mounting arrangement has a circumferential rectangular elongate support surface and the outlet openings of the arranged in the adjacent of the plurality of receptacles air-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 respectively 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-to-air heat exchanger cassettes.

   Such an arrangement offers 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 side walls bounding the functional space by surrounding from outside ambient air between the functional space wall and an exterior Housing penetrates, to be cooled. Thus, a downwardly directed air flow takes place in the interior of the functional space adjacent to the functional space side walls. The heated air rises inside, preferably in the middle of the functional space up and enters the air-to-air heat exchange cassettes.

  
In a preferred embodiment, the air-to-air heat exchange cassettes have channels oriented vertically and parallel to the longitudinal axis of the mounting arrangement, which pass through one of the first fluid streams and one of the second fluid streams alternately horizontally transversely to the transverse axis. 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-to-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.

  
In order to ensure a flat tree shape and yet to improve the suction of ambient air, which flows through openings in vertical side walls of the outer housing or through openings in vertical side surfaces of the outer roof in a gap between the inner housing and the outer housing, are the second fan mounted tilted in a preferred embodiment with respect to a horizontal mounting position. Upwards, i. to the outer roof, facing ends of the axes of rotation are measured along the longitudinal axis of the mounting assembly further 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 to nevertheless achieve a flat design, the mounting arrangement preferably has recesses which are formed or arranged (in operation) under the bearing surface of the mounting arrangement or under a plane in which the air-air heat exchanger cassettes are arranged. The depressions are preferably trough-shaped. In electric 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, which suck in the interior space or functional space heated cooling fluid and promote in the air or 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-air heat exchanger cassettes. Such a first fan is designed as a radial fan, flows into the bottom of the interior, possibly by a grid to prevent unintentional interference with the first fan during operation during maintenance, heated in the interior 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 one embodiment, to protect the cooling assembly from external effects, the cooling arrangement comprises an outer roof closing off the electrical cabinet or equipment cabinet above, the air-to-air heat exchanger cassettes and the closure elements, which may alternatively be used, adapted to the outer roof they prevent buckling of the outer roof when acting from above and outside on the outer roof forces. Thus, the operation of the cooling arrangement is always ensured. The air-to-air heat exchange cassettes and the closure elements are thus structurally designed so stable 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 thereon can be achieved.

  
To optimally design an air supply to the inlets of the air-to-air heat exchanger cassettes, in a preferred embodiment the fans are each surrounded by vanes which drive the air drawn 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 inflow 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 pedestal, i. downwards, the functional space is dust-tight and fluid-tight and therefore also moisture-proof sealed. 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 support surface 46, which rests on the profiles 7 of the frame 6 and the functional space 4 hermetically dust and fluid-tight seals. 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. Via the radial fans further baffles 32, 33 are arranged, which supply the air to the further inlet openings 34, 35 of the air-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 which enters and exits the outer housing via slot-like openings 36 called gills in an outer roof 37. 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 roof 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 case 3, and the walls of the outer case 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. Around a likewise substantially rectangular trained support surface 46 is formed. 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-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 exchange 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 arranged in a trough-like depression 56 of the mounting arrangement 11. 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 arranged above 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 conducted into the air-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 environmental 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, may be largely separated by baffles (not shown) so that effective circulation of indoor air will take place in the area where the heat takes place through the installed 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 fans 2, 33 further baffles 4, 35 further inlet openings 6 openings 7 outside roof 8 fins, 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 electric or equipment cabinet (1) comprising a functional space (4) with a longitudinal axis along a (9) elongated cross-sectional area, wherein in the functional space (4) devices and / or facilities that in their operation Generate waste heat, can be arranged or arranged, wherein the cooling arrangement (12) comprises 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 (47) or an air-to-air heat exchange cassette (15, 16), wherein the air-to-air heat exchange cassettes (15, 16) are configured such that in operation of the cooling arrangement (12) in each of the air arranged in one of the plurality of receptacles (13, 14) Air heat exchanger cassettes (15, 16) each one with the functional space (4)
 communicating first fluid flow (25, 26) through the respective air-to-air heat exchange cassette (15, 16) and a second fluid flow (28, 29), respectively, separated from the first fluid flow and communicating with ambient air of the electrical or instrument cabinet (1) Form longitudinal axis (27) to transfer heat from the first fluid stream (25, 26) to the second fluid stream (28, 29), characterized in that two of the plurality of receptacles (13, 14) are formed so that in this Receivers (13, 14) arranged air-air heat exchanger cassettes (15, 16) along the longitudinal axis (27) spaced outlet openings and / or along the longitudinal axis (27) spaced from each other inlet openings (22, 23) for the respective first fluid streams (25, 26 ) exhibit.
Second cooling arrangement (12) for an electric 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 of receptacles ( 13, 14) arranged air-air heat exchanger cassettes (15, 16) respectively first fluid streams (25, 26) form, which are directed parallel to the longitudinal axis (27) opposite.
3. cooling arrangement (12) for an electric 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) can maintain or assist the first fluid streams (25, 26) or alternatively the second fluid streams (28, 29) through both respective air-air heat exchanger cassettes (15, 16) disposed in the adjacent one of the plurality of receptacles (13, 14) ,
4. Cooling arrangement (12) for an electric 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 a placement situation of these recordings (13, 14) with air-air heat exchanger cassettes (15, 16) is driven.
5. cooling arrangement (12) for an electric 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 electric 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 electric 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 which horizontally transverse to the longitudinal axis (27) alternately through one of the first fluid streams (25, 26) and one of the second fluid streams (28, 29) are flowed through.
8. cooling arrangement (12) for an electric 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-heat exchanger cartridges (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 electric 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 off the electrical cabinet or equipment cabinet (1) above, wherein the LuftLuft- 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) from above and outside on the outer roof (37) acting forces.
10. cooling arrangement (12) for an electric or equipment cabinet (1) according to any one of the preceding claims, characterized in that the first and second fans (18, 30, 31) are each radial fans.
11. Cooling arrangement (12) for an electric 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 sucked by the fans (18, 30, 31) Move air into and / or the corresponding channels of the air-to-air heat exchanger cassettes (15, 16).
12. A cooling arrangement (12) for an electric or equipment cabinet (1) according to any one of the preceding claims, characterized in that the outer roof (37) gills, to allow an inflow and outflow of the fluid of the second fluid streams (28, 29).
13. cooling arrangement (12) for an electric 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) are driven and controlled.
14. Cooling arrangement (12) for an electric 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 - Disconnect air heat exchanger cassettes (15, 15) from a discharge area (41).
15, cooling arrangement (12) for an electric or equipment cabinet (1) according to 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) so that these along the longitudinal axis (27) adjacent areas (43, 44) of the Functional space (4) cool.
16, cooling arrangement (12) for an electric or equipment cabinet (1) according to one of the preceding claims, characterized in that the fans (18, 30, 31) respectively upstream of inlet openings (22, 23) of the air-air heat exchanger cassettes (15, 16) and the respective fluid streams (25, 26; 28, 29) blow into the air-to-air heat exchanger cassettes (15, 16).
PCT/EP2009/006433 2008-10-08 2009-09-04 Cooler arrangement for an electrical or equipment cabinet having air-to-air heat exchanger cassettes WO2010040432A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE102008050778.4 2008-10-08
DE102008050778A DE102008050778B9 (en) 2008-10-08 2008-10-08 Cooling arrangement for a housing with air-to-air heat exchanger cassettes and a housing with such a cooling arrangement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13/123,471 US20110198062A1 (en) 2008-10-08 2009-09-04 Cooler arrangement for an electrical or equipment cabinet having air-to-air heat exchanger cassettes
EP20090778338 EP2335462A1 (en) 2008-10-08 2009-09-04 Cooler arrangement for an electrical or equipment cabinet having air-to-air heat exchanger cassettes

Publications (1)

Publication Number Publication Date
WO2010040432A1 true WO2010040432A1 (en) 2010-04-15

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ID=41346137

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PCT/EP2009/006433 WO2010040432A1 (en) 2008-10-08 2009-09-04 Cooler arrangement for an electrical or equipment cabinet having air-to-air heat exchanger cassettes

Country Status (4)

Country Link
US (1) US20110198062A1 (en)
EP (1) EP2335462A1 (en)
DE (1) DE102008050778B9 (en)
WO (1) WO2010040432A1 (en)

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Also Published As

Publication number Publication date
US20110198062A1 (en) 2011-08-18
EP2335462A1 (en) 2011-06-22
DE102008050778B4 (en) 2011-01-20
DE102008050778B9 (en) 2011-06-16
DE102008050778A1 (en) 2010-04-22

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