EP2018690A1 - Armoire électrique munie de deux canaux de refroidissement - Google Patents

Armoire électrique munie de deux canaux de refroidissement

Info

Publication number
EP2018690A1
EP2018690A1 EP07724601A EP07724601A EP2018690A1 EP 2018690 A1 EP2018690 A1 EP 2018690A1 EP 07724601 A EP07724601 A EP 07724601A EP 07724601 A EP07724601 A EP 07724601A EP 2018690 A1 EP2018690 A1 EP 2018690A1
Authority
EP
European Patent Office
Prior art keywords
electrical cabinet
cooling
cooling channel
fluid
cabin
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.)
Withdrawn
Application number
EP07724601A
Other languages
German (de)
English (en)
Inventor
Michael Wantschik
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TE Connectivity Germany GmbH
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
Application filed by ADC GmbH filed Critical ADC GmbH
Publication of EP2018690A1 publication Critical patent/EP2018690A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
    • H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
    • H02B1/56—Cooling; Ventilation
    • H02B1/565—Cooling; Ventilation for cabinets

Definitions

  • the invention relates to an electrical cabinet for receiving electrical and / or electronic and / or optoelectronic systems which is suitable in particular for outdoor installation and comprises an inner cabin and an outer cabin.
  • a low-power distribution system may be, for example, a telephone system with associated power supply facilities and Lucasab- / - connection devices for a particular spatial area.
  • Such electrical cabinets must meet different conditions. On the one hand, they should protect the electrical or electronic components of the system from mechanical influences. Furthermore, the electrical cabinets should provide the operating conditions for the electrical and electronic or opto-electronic systems inside the inner cabin, which are necessary for trouble-free operation.
  • the inner cabin is well sealed against the environment during operation.
  • EMC electromagnetic compatibility
  • the inner cabin usually has a metallic sheath, which also requires a virtually complete conductive seal.
  • the electrical, electronic and / or optoelectronic systems generate heat during operation. This must be removed from the inner cabin to prevent overheating of the equipment.
  • In the interior of the inner cabin usually forms an air flow, in which warm air rises. Due to the forming air flow inside the inner cabin, the heat is at least partially directed to the boundary surfaces of the inner cabin. About this at least a portion of the heat generated can be dissipated.
  • a generic electrical cabinet in which an intermediate space is formed between an inner cabin and an outer cabin.
  • the electrical cabinet is designed so that from below into the space air can flow, heated by heating at boundary surfaces of the inner cabin and thereby rises and in an upper portion of the electrical cabinet exits through outlet openings in the outer cabin again.
  • the circulation of air in the space between the inner cabin and the outer cabin cools the boundary surfaces of the inner cabin and thus dissipates the heat generated in the inner cabin from the electrical equipment from the electrical cabinet.
  • the gap between the inner cabin and side walls of the outer cabin is limited by an intermediate ceiling upwards.
  • active elements such as fans, are arranged in openings so that cold air is drawn through the substantially vertical spaces between the inner cabin and the outer walls of the outer cabin, through which openings in the false ceiling exit and through an upper roof, which laterally projects beyond the sidewalls of the outer cabin, deflects laterally, and is vented through a gap formed between the upper roof projecting beyond the sidewall and the outer cabin side wall.
  • the known electrical cabinets provide for a certain cooling of the boundary surfaces of the inner cabin and this for a cooling of the interior of the inner cabin, however, there are needed electrical cabinets with improved cooling behavior, especially in climatically particularly unfavorable areas, a particularly high solar radiation or a particularly high ambient air temperature to be used.
  • the invention has for its object to provide an electrical cabinet of the type mentioned above, which provides improved cooling performance.
  • a first cooling channel and a second cooling channel to be formed separately adjacent to boundary surfaces of the inner cabin and the first cooling passage includes a cooling portion adjacent to an upper boundary surface of the inner cabin.
  • At least one first cooling channel and a second cooling channel which adjoin the boundary surfaces of the inner cabin, that is, comprise at least a portion which extends along the boundary surface.
  • This section is called a cooling section.
  • Heat generated inside the inner cabin can thus be delivered to a cooling fluid located in the cooling section of the cooling passage through the boundary surfaces which seal the inner cabin against fluid exchange.
  • a wall optionally configured separately from the inner boundary surface to be cooled is in good thermal contact with this boundary surface.
  • the first cooling channel and the second cooling channel do not have to be jointly adjacent to one of the boundary surfaces of the inner cabin from the outside.
  • adjacent to each of the boundary surfaces of the inner cabin either the first or the second cooling channel.
  • both the first and the second cooling channel from the outside adjacent to one of the boundary surfaces
  • the first cooling channel or the second cooling channel do not have to adjoin each of the boundary surfaces. There may thus be boundary surfaces to which neither the first cooling channel nor the second cooling channel adjoin. These boundary surfaces can be uncooled.
  • at least one further cooling channel is formed, which adjoins these boundary surfaces from the outside.
  • cooling channels When formed separately, two cooling channels are considered in which cooling streams form during operation, which are adjacent to the inner cabin separated from each other, ie do not allow cooling fluid exchange in this area. additionally it is necessary that the electrical cabinet be operable so that cooling fluid that has been heated in the first cooling channel does not subsequently flow through the second cooling channel along one of the boundary surfaces. The same applies to further cooling fluid that has been heated in the second cooling channel. This too is guided by the separate design of the cooling channels so that it does not subsequently flow past again in the first cooling channel on one of the boundary surfaces of the inner cabin.
  • first and second cooling passages Separate formation of the first and second cooling passages allows a unheated cooling fluid to flow into the first cooling passage and another cooling fluid, also unheated, to flow into the second cooling passage.
  • the cooling fluid and the further cooling fluid can, for example, flow or be sucked into the electrical cabinet via a common cooling fluid inlet area.
  • the cooling fluid that has been heated in the first cooling passage and the second cooling fluid that has been separately heated in the second cooling passage may flow out or be blown out through a common exhaust area.
  • the first and the second cooling channel are in each case so separated that an inflow or suction of each already in the other cooling channel already heated cooling fluid does not take place in the proper operation inside the electrical cabinet.
  • a common outflow of the heated cooling fluid and the further heated cooling fluid in a common outlet region is possible.
  • the highest temperatures at the boundary surfaces of the inner cabin occur at an upper boundary surface. This is due to the fact that the air circulation inside the inner cabin drives warm air to the upper boundary surface, which gives at least a part of the heat energy to the upper boundary surface.
  • the inner cabin which comprises a ceiling as the upper boundary surface, which closes the inner cabin upwards and to which the first cooling channel adjoins, is thereby better cooled, especially at the upper boundary surface.
  • a ceiling includes, which closes the inner cabin up and adjacent to the first cooling channel.
  • the first cooling channel comprises the cooling section adjoining the upper boundary surface of the inner cabin and comprising both a fluid inlet and a fluid outlet in an upper region of the electrical cabinet, wherein the fluid inlet and the fluid outlet preferably above the upper boundary surface and / or are arranged at the height of the upper boundary surface of the inner cabin in one of the peripheral walls of the outer cabin or a roof area.
  • the fluid inlet and the fluid outlet of the first cooling channel are thus preferably arranged in a side wall, a front wall or a rear wall.
  • the first cooling channel is formed entirely above the inner cabin.
  • a bottom wall of the first cooling channel may form the upper boundary surface of the inner cabin.
  • an embodiment is preferred in which the ceiling of the inner cabin, at least for a large length of the first cooling channel, at the same time a boundary wall of the first cooling channel.
  • a bottom wall of the first cooling channel forms the upper boundary surface of the inner cabin.
  • the upper boundary surface and ceiling of the inner cabin is advantageously made of metal, in order to ensure good heat conduction from the interior to the first cooling channel. It may further be provided that heat sinks or cooling elements projecting into the first cooling channel are arranged on the ceiling. These are flowed around by a cooling fluid flow, which is formed in operation in the first cooling channel, so that optimum heat transfer to the cooling fluid is possible.
  • the same elements for enlarging the surfaces of the upper boundary surfaces can protrude into the interior of the inner cabin. Here they serve to absorb the heat and heat conduction to the projecting into the first cooling channel cooling elements. This allows a further improved heat dissipation.
  • a thermal paste or the like is preferably arranged between them.
  • a particularly good throughput of cooling fluid results in an embodiment in which the first cooling channel extends from a side wall of the electrical cabinet to an opposite side wall of the electrical cabinet, so that in operation a first cooling fluid circuit is formed in which a cooling fluid through one or more first Fluid openings in the one side wall of the electrical cabinet enters, at least partially flows past at least one of the boundary surfaces of the inner cabin and absorbs heat emitted and exits on the opposite side wall of the electrical cabinet through one or more second fluid openings again.
  • the first cooling channel is thus preferably formed along a transverse direction of the electrical cabinet.
  • the first cooling channel preferably has a rectangular cross section, wherein a long edge of the rectangle coincides with the upper boundary surface of the inner cabin.
  • the first cooling channel By arranging the first cooling channel from one side surface to the opposite side surface of the electrical cabinet, a rectilinear flow through the first fluid channel is made possible. Further, the inflow path of the cooling fluid until it flows past the upper boundary surface of the inner cabin is short in proportion to the path length that the cooling fluid flows along the upper boundary surface of the inner cabin. The same applies to the outflow.
  • the first cooling channel thus extends substantially horizontally through the electrical cabinet.
  • the first cooling channel comprises an inflow section and an outflow section whose length is in each case short in relation to a length of the cooling section.
  • the inflow section and outflow section are considered to be the sections of a cooling channel through which cooling fluid is conducted to a cooling section or away from the cooling section.
  • a particularly good cooling is obtained when the inflow section and the outflow section of the cooling section of the first cooling channel, which adjoins the upper boundary surface, do not adjoin one of the peripheral walls of the inner cabin.
  • the electrical cabinet is operable to form a fluid flow of the cooling fluid in the first cooling passage, wherein cold cooling fluid enters the first cooling passage from the outside, flows along and heats along at least part of the upper boundary face, and then the heated one Cooling fluid flows out of the electrical cabinet without flowing along a wide of the boundary surfaces of the inner cabin when flowing in or out to the upper boundary surface.
  • Flow along a boundary surface also includes flow along a wall of the cooling channel that is separate from the boundary surface but that extends adjacent to and is thermally in contact with the boundary surface along that boundary surface. Abutment means that there is a common contact area.
  • a cooling channel or a portion thereof adjoins a surface as it extends along the surface so that heat exchange is possible over a contact or abutment surface formed thereby.
  • a plane formed parallel to an upper side surface of a cuboid and contacting this upper side surface in this sense does not adjoin one of the other lateral side surfaces of the cuboid, although here there is a line of contact of the lateral side surface with the plane.
  • a particularly good cooling performance is achieved in an embodiment in which the first cooling channel is configured so that the cooling fluid in the first cooling channel in operation sweeps over a majority of a surface, preferably the entire surface, the upper boundary surface of the inner cabin with a flow, wherein the Most of the surface overflows more than half of the surface, more preferably more than two-thirds, and most preferably the entire surface of the upper boundary surface.
  • the center of the upper boundary surface in each case is well cooled, at which usually the highest temperatures occur.
  • a majority of the surface comprises a center of the surface of the upper boundary surface.
  • the first cooling channel comprises a first active element, in particular a fan, which in operation initiates, maintains and / or supports a flow of the cooling fluid.
  • a controlled cooling via a control of the first active element is possible.
  • the first active element only needs to operate when a threshold temperature inside the inner cabin is exceeded.
  • a separate formation of the first and the second cooling channel make it possible for cooling flows to be formed and regulated separately in the two cooling channels.
  • a cooling flow along the upper boundary surface can be realized with a fluid throughput which differs from a fluid throughput in the second cooling channel, which cools the peripheral walls.
  • an actively driven flow can be realized in the first cooling channel, while in the second cooling channel a "natural" flow occurring due to the heating of the further cooling fluid along the peripheral walls is used.
  • the second cooling channel comprises one or more intermediate spaces which are formed between the inner cabin and the outer cabin along circumferential walls which are boundary surfaces of the inner cabin.
  • the second cooling channel thus provides cooling of the peripheral walls of the inner cabin. Furthermore, it is achieved by this arrangement that the solar radiation acting from the outside on the outer cabin, which lead to a heating of the boundary surfaces of the outer cabin, are also cooled by the cooling fluid in the second cooling channel. As a result, a heat input by the sun is reduced or completely avoided in the interior of the inner cabin.
  • the electrical cabinet is advantageously designed such that the second cooling channel in a lower region of the electrical cabinet comprises one or more fluid inlet openings and in an upper region, preferably above the upper boundary surface of the inner cabin, comprises at a front and / or a rear side of the electrical cabinet fluid outlet openings.
  • a fluid flow through the second cooling channel only and solely due to the heating of the cooling fluid in the second cooling channel adjusts to the boundary surfaces of the inner cabin or the outer cabin.
  • the circulation in the second cooling passage can be improved by arranging an intermediate roof, preferably above the first cooling passage, so that the space or gaps between the peripheral walls of the inner cabin and the peripheral walls of the outer cabin of the second cooling passage are upwardly bounded or are so that in operation along the peripheral walls of the inner cabin upwardly directed fluid flow by a arranged in at least one opening of the intermediate roof second active element, in particular a further fan in motion, entertained and / or supported.
  • the second fluid channel is thus a closed space, which has fluid inlet openings in the lower area.
  • a gap is formed as the fluid inlet opening between the inner cabin and the outer cabin.
  • the cooling fluid is sucked in by the second active element arranged in the intermediate roof.
  • the second active element can be operated so that the cooling fluid is sucked through the fluid outlet openings in the upper region of the electrical cabinet and injected through the intermediate roof, so that a downward flow of the cooling fluid along the peripheral walls of the inner cabin is formed and the cooling fluid heated exits the fluid inlet openings again.
  • the terms fluid inlet opening and fluid outlet opening indicate the corresponding purpose of the openings which they designate only for one flow direction.
  • the intermediate roof is arranged above the first cooling channel, so that a fluid flow forming during operation in the second cooling channel at least partially surrounds boundary surfaces of the first cooling channel which do not adjoin the inner cabin or one of the opposite side surfaces, is achieved that not only the inner cabin but also the first cooling channel is largely protected from exposure to sunlight or other heat input through the outer cabin through the first cooling circuit. This allows a particularly optimal air conditioning inside the inner cabin.
  • an outer roof which delimits the second cooling channel upwards.
  • Optimal flow in the second cooling channel is obtained by the intermediate roof descending down to the front side and / or falling down to the rear side.
  • upwardly flowing cooling fluid flow is optimally directed to a preferably arranged in the middle of the intermediate roof opening, in which preferably the second active element is arranged.
  • Strömungsleitvorairesen preferably Strömungsleitbleche be arranged.
  • the fluid outlet openings arranged above the intermediate roof at the front and / or rear of the electrical cabinet are at the same height can be located as the first and second fluid ports of the first cooling channel on the opposite side walls of the electrical cabinet.
  • the inner cabin and the outer cabin each comprise at least on one of the sides, preferably the front, of the electrical cabinet an openable element, preferably a door.
  • the reveal element of the interior cabin is attached to the reveal element of the exterior cabin, so that the interior cabin is opened together with the opening of the reveal element of the exterior cabin.
  • an improved seal can usually be achieved when the reveal element of the interior cabin is formed separately from the reveal element of the exterior cabin.
  • a particularly flexible construction of the electrical cabinet can be achieved if the inner cabin comprises a mounting frame, which is planked. In particular, in the construction of the electrical cabinet so more room for installation of electrical systems is given.
  • the inner cabin and / or the outer cabin are usually made of metal or plastic, in particular foamed plastic.
  • a lining with a metal foil of the inner cabin on an inside or outside is necessary.
  • the first cooling channel may for example be arranged in an intermediate element which is placed on under peripheral walls.
  • the described electrical cabinets are preferably designed so that the side wall and the opposite side wall are designed so that the electrical cabinet can be set up next to another similar electrical cabinet in such a way that in operation in the electrical cabinet and the other similar electrical cabinet forms a common first cooling circuit.
  • the fluid outlet openings of the second cooling channel are arranged at the front and / or rear of the electrical cabinet. As a result, when juxtaposing electrical cabinets no fluid outlet openings of the electrical cabinet are blocked, which would have a reduced cooling performance.
  • an arrangement of electrical cabinets of the type just described is proposed in which it is provided that the electrical cabinets are arranged in a row such that a common first cooling circuit is formed during operation.
  • the advantages just described are achieved.
  • the first cooling channel of each electrical cabinet is due to the fact that the first cooling channels each have only a short length and a relatively large flow cross-section.
  • the first cooling channels are preferably constructed in a straight line, so that a fluid conductance is high. This ensures that, in particular when using the first active elements, a sufficiently high flow of cooling fluid through the juxtaposed similar electrical cabinets is ensured.
  • Fig. 1 is a schematic representation of an electrical cabinet in a
  • Fig. 2 is a schematic view of the electrical cabinet of FIG. 1 in a
  • 3 and 4 are schematic principle views of an embodiment of an electric cabinet.
  • FIG. 1 the front view of an embodiment of an electrical cabinet 1 is shown schematically.
  • the electrical cabinet 1 comprises an inner cabin 2 and an outer cabin 3.
  • the inner cabin 2 encloses an inner space 4, in which electrical, electronic and / or opto-electronic systems can be accommodated. These systems are in particular low-current distribution systems, as used in communications technology.
  • the inner cabin 2 comprises a mounting frame 5 to which on the one hand the systems located in the interior 4 are attached and on the other hand, the boundary surfaces 6 of the inner cabin 2 are attached.
  • the boundary surfaces 6 comprise circumferential walls 7 on the sides (lateral sides, front and back) and an upper boundary surface 8 which closes the inner cabin 2 upwards in the form of a ceiling.
  • On a lower side 9 of the mounting frame 5 is mounted on the ground.
  • the inner cabin 2 and / or the outer cabin 3 are mounted on a pedestal, which is completely or partially embedded in the ground. Through the mounting frame 5 cables are guided from the lower side 9 through the mounting frame 5 in the interior 4.
  • the inner cabin 2 to the lower side 9 is usually also sealed with a planking. You can also use closed sockets are only having sealable openings for incoming and outgoing cables.
  • the interior 4, which is also referred to as a functional space is sealed by the boundary surfaces 6 against fluid exchange.
  • the outer car 3 surrounds the inner car 2, the circumferential walls 10 of the outer car 3 being spaced from the peripheral walls 7 of the inner car 2.
  • the outer cabin 3 and the inner cabin 2 at several points via connecting elements are connected.
  • a gap 11 between the peripheral walls 10 of the outer cabin 3 and the peripheral walls 7 of the inner cabin 2 may be divided into a plurality of intermediate spaces. Due to the distance between the peripheral walls 10 of the outer cabin 3 and the peripheral walls 7 of the inner cabin 2 ensures that there is an air cushion between them.
  • the outer cabin 3 and inner cabin 2 form a double-walled electrical cabinet 1.
  • a first cooling channel 12 is provided. This directly adjoins the upper outer boundary surface 8. This is usually on the one hand the ceiling of the inner cabin 2 and on the other hand, a bottom wall 13 of the first cooling channel 12.
  • the upper boundary surface 8 of the inner cabin 2 is formed by the bottom wall 13.
  • the first cooling channel 12 extends from a side wall 14 to an opposite side wall 15. As can be seen from Fig. 2, in which a schematic side view of the electrical cabinet 1 according to Fig. 1 is shown, the first cooling channel 12 has a cuboid cross-section. A depth 16 of the first cooling passage 12 preferably corresponds to a depth 17 of the inner cabin 2. In a longitudinal direction 18, the first cooling passage 12 extends straight along a transverse direction of the electric cabinet 1 therethrough. A cooling fluid 19, generally ambient air, is sucked through first fluid openings 20 into the first cooling channel 12. The first fluid openings 20 are located in the side wall 14. The initially cold cooling fluid 19 flows past the upper boundary wall 8 of the inner cabin 2 and heats up.
  • the heated cooling fluid 19 is blown out through second fluid ports 21 located in the opposite side wall 15.
  • a first active element 22 is provided in the first cooling channel 12, which is generally designed as a fan.
  • heatsink can be arranged to effect a better heat transfer to the cooling fluid 19.
  • the cross section of the first cooling channel 12 can also take any other arbitrary shape, wherein an outer boundary surface of the first cooling channel 12 at the same time should be the upper boundary surface 8 of the inner cabin 2 (for example, this includes) or thermally conductively connected thereto.
  • a section of a cooling channel extending along one of the boundary surfaces 6 of the inner cabin 2 is referred to as a cooling section. Portions which supply cooling fluid to this cooling section from outside the electrical cabinet are referred to as the upstream section. Accordingly, sections will pass through the heated cooling fluid flows outwardly from the cooling section out of the electrical cabinet, referred to as the outflow section.
  • Inlet and outflow sections of a cooling section may itself be at least partially designed as cooling sections. However, as in the embodiment according to FIGS. 1 and 2 and in the embodiment of FIGS. 3 and 4 described below, the inflow and outflow sections of the cooling sections cooling the upper boundary surface of the inner cabin are preferably not formed as cooling sections.
  • a second cooling channel 23 is provided.
  • the second cooling passage 23 includes the space 11 formed between the peripheral walls 10 of the outer car 3 and the peripheral walls 7 of the inner car 2.
  • the second cooling channel 23 is bounded by a top roof 24.
  • the fluid inlet openings 26 may be formed in the peripheral walls 10 of the outer cabin 3 in a lower area thereof. In the embodiment shown in Figs. 1 and 2, the fluid inlet openings 26 are formed by gaps which form on the lower side 9 of the electrical cabinet 1, when the peripheral walls 10 do not abut the substrate on which the electrical cabinet 1 is attached.
  • an intermediate roof 27 is provided, which extends from a front side 28 to a rear side 29 over an entire inner depth 30 of the electrical cabinet 1.
  • the intermediate roof 27 extends along a width of the outer cabin 3 from the side wall 14 to the opposite side wall 15. Thereby, the gap 11 between the peripheral walls 7 of the inner cabin 2 and the peripheral walls 10 of the outer cabin 3 and a volume above it, in the first cooling channel 12 is located, delimited upwards.
  • the intermediate roof 27 comprises at least one opening 31, through which the further cooling fluid 25, after having heated itself on the inner peripheral walls 7 of the inner cabin 2, can flow upwards through the intermediate roof 27.
  • a second active element 32 is preferably arranged, which may also be designed as a fan.
  • the heated further cooling fluid 25 of the second cooling channel 23 is then passed from the top roof 24 to fluid outlet openings 33 on the front side 28 and / or the rear side 29 of the electrical cabinet 1.
  • the intermediate roof 27 is preferably chamfered down to the front 28 and the rear 29 of the outer cabin 3 so that the fluid outlet openings 33 through which the further cooling fluid 25 exits heated at approximately the same height as the first and second fluid openings on the side wall 14 and the opposite side wall 15 can be arranged.
  • the first cooling channel 12 is completely surrounded by the second cooling channel 23 with the exception of the contact points on the side wall 14 and the opposite side wall 15 and the common wall surface to the inner cabin 3. This ensures that from the outside via the outer cabin 3 no heat radiation or heat input to the first cooling channel 12 or the inner cabin 2 takes place directly.
  • the further cooling fluid 25 enters cold at the fluid inlet openings 26, flows along the peripheral walls 7 of the inner cabin 2 and the peripheral walls 10 of the outer cabin 3 upwards, flows around the first cooling channel 12 and flows to the opening 31 in the intermediate roof 27 and then flows between the intermediate roof 27 and the top roof 24 to the fluid outlet openings 33rd
  • first cooling channel 12 By arranging the first cooling channel 12 in such a way that the first cooling fluid 19 can move in a straight line from the side wall 14 to the opposite side wall 15, it is possible to arrange several similar electrical cabinets 1 next to one another. As a result, a common first cooling channel 12 is formed in the adjacent electrical cabinets 1. Characterized in that the second cooling channel 23 only fluid outlet openings on the front 28 and / or back 29 of the electrical cabinet 1, no fluid outlet openings 33 are blocked by such an arrangement.
  • both the inner cabin 2 and the outer cabin 3 preferably on the front side 28 of the electrical cabinet 1 one or more apparent elements (not shown), which are usually as doors or flaps are formed.
  • the peripheral walls 10 of the outer cabin 3 can be made as segments of metal or foamed plastic, preferably polycarbonate foam.
  • the peripheral walls 10 may be pulled up to the top roof 24 and still include the fluid outlet openings 33 themselves.
  • the peripheral walls 10 of the outer car 3 end approximately at a height corresponding to the height of the inner car 2.
  • the first cooling channel 12 and the intermediate roof and the fluid outlet openings 33 may be arranged in an intermediate part, on which the upper roof 24 touches.
  • the intermediate part can also be integrated with the top roof 24, so that there is an upper part.
  • the person skilled in various ways for creating a carcass for the outer cabin 3 and a carcass for the inner cabin 2 are known.
  • the electrical cabinet 1 may be configured as a kit, so that it can be easily transported and individual parts for different sized electrical cabinets 1 can be used.
  • a shell just described with different peripheral walls 10 may be used to build different levels of electrical cabinets 1.
  • FIGS. 3 and 4 show schematic views of a further embodiment of an electrical cabinet 1.
  • the electrical cabinet 1 comprises an inner cabin 2, which has a mounting frame 5 made of frame profiles 34 screwed together. On peripheral walls of the inner cabin 2, a planking 35 is attached.
  • the upper boundary surface 8 of the inner cabin 2 is the bottom wall 13 of a first cooling channel 12, which is inserted from above into the mounting frame 5 formed from the frame profiles of the inner cabin 2.
  • a circumferential outwardly projecting edge 36 of the cooling channel 12 rests on the frame profiles 34.
  • a height 37 of the first cooling channel 12 in the region of the upper boundary surface 8 of the inner cabin 2 is in the range of a profile thickness 38 of the frame profiles 34.
  • an inlet port 40 is formed at a first end 39 of the cooling passage 12 at an upper side, in which a first active element 22 designed as a fan is arranged.
  • the inlet connection 40 connects an inlet region 41 above the intermediate roof 27 with the part of the first cooling channel 12 extending parallel to the upper boundary surface 8 of the inner cabin 2.
  • the inlet connection 40 seals the first cooling channel 12 with respect to the second cooling channel 23 below the intermediate roof 27.
  • An outlet port 42 connects the parallel to the upper boundary surface 8 of the inner cabin 2 extending part of the first cooling channel 12 with an outlet portion 43 above the intermediate roof 27 at the one end 39 opposite end 44 of parallel to the upper boundary surface 8 of the inner cabin 2 extending part
  • the outlet port 42 seals the first cooling channel 12 below the intermediate roof 27 in the same way from the second cooling channel 23, as the inlet nozzle 40.
  • the cooling fluid 19 thus enters the inlet region 41 cold through first fluid openings 20 'through a side wall 14 and / or parts of the front side and / or parts of the rear side of the electrical cabinet 1.
  • the cooling fluid 19 is blown through the first active element 22 via the inlet port 42 in the running parallel to the upper boundary surface 8 part of the first cooling channel 12, heats up as it flows past the upper boundary surface 8 and then passes through the Outlet outlet 42 in the outlet region 43 and flows through second fluid openings 21 'through the opposite side wall 15 and / or parts of the front and / or parts of the back of the electrical cabinet 1 heated from.
  • the inlet region 41 can be separated from a further inlet region 47 by a further separating web 46.
  • FIG. 3 While a flow of the cooling fluid 19 through the first cooling channel is shown in FIG. 3, the flow of a further cooling fluid 25 through the second cooling channel 23 of the electrical cabinet 1 is shown in FIG. 4.
  • the further cooling fluid 25 enters the further inlet region 47 between the top roof 24 and the intermediate roof 27. If the inlet region 41 is not separated from the further inlet region 47 by the further separating web 46, then further cooling fluid 25 passes through the first fluid openings 20 'in the region of the inlet region 41 through the side wall 14 and / or the parts of the front side and / or parts Rear side of the electrical cabinet 1.
  • the second active element 32 comprises three fans, which are arranged horizontally via openings 31, 31 ', 31 "in the intermediate roof 27.
  • the further cooling fluid 25 is injected into the area below the intermediate roof 27 and The heated further cooling fluid 25 then exits the electrical cabinet 1 through fluid outlet openings 48. It has been found advantageous to provide the cold cooling fluid 19 and the further cooling fluid 25 through the fluid inlet openings and first fluid openings 20 'in the upper area of the electrical cabinet e suck in and to blow through the first cooling channel 12 and the second cooling channel 23, so that the further cooling fluid 25 at the bottom of the electric cabinet 1 through the fluid outlet openings 48 exits. As a result, a lower noise level is achieved than in an embodiment in which the cooling fluid 19 (see FIG.
  • FIGS. 3 and 4 The embodiment described in FIGS. 3 and 4 is characterized by a particularly low height 37 of the part of the first cooling channel 12 running parallel to the upper boundary surface 8.
  • the first active element 22 is designed as a fan
  • this is also installed horizontally, d. H. the fan blades rotate in a horizontal plane, ie in a plane perpendicular to the plane of the drawing of FIGS. 3 and 4.
  • the first cooling channel which cools the upper boundary surface, is formed to be completely formed above the inner cabin.
  • a bottom wall of the first cooling channel form the upper boundary surface of the inner cabin.
  • Fluid inlet openings and fluid outlet openings are located in an upper area of the electrical cabinet, above or at the level of the upper boundary surface of the inner cabin.
  • the upstream portion includes the inlet portion 41 and the inlet port 40.
  • the downstream portion includes the drain port 42 and outlet portion 43. All portions including the cooling portion are formed above the inner cabin 2.
  • a good cooling of the upper boundary surface is particularly advantageous for large electrical cabinets, as in these air circulation in the interior, which ensures that heated air is primarily directed along the peripheral walls, as provided in the prior art to the peripheral walls of the Dissipate heat from the interior, difficult to maintain.
  • the peripheral walls are cooled by the second cooling channel and the upper boundary surface is cooled in addition to the first cooling channel by a further cooling channel.
  • inlet openings of a common inlet region of the first cooling channel and of the further cooling channel could be provided on the front wall and / or rear wall in the roof region in each case in a middle region of the front wall and rear wall.
  • One or more fans suck on this cooling fluid and direct this into the first cooling channel and the further cooling channel each having a extending from the middle to one of the side walls cooling section and a discharge section, the outlet openings in the corresponding side wall and / or in the front and / or rear wall of the electrical cabinet at its edges, preferably in the roof area.
  • the outer cabin is the outer housing or the outer cabinet.
  • the inner cabin is an inner housing or an inner cabinet enclosing a functional space from which the heat generated in it can not be dissipated by convection, as through the boundary surfaces through no fluid exchange is possible.
  • cooling fluid 0 20 'first fluid openings 1, 21' second fluid openings 2 first active element 3 second cooling channel 4 top roof 5 further cooling fluid 6 fluid inlet openings 7 intermediate roof 8 front 9 back 0 inner depth of the outer cabin 1, 31 ', 31 "opening 2 second active element Fluid outlet openings

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Abstract

L'invention concerne une armoire électrique (1) destinée à recevoir des installations électriques et/ou électroniques et/ou optoélectroniques, en particulier des installations de distribution de courant à basse tension, ladite armoire étant en particulier appropriée pour être installée à l'extérieur, comprenant une cabine intérieure (2) et une cabine extérieure (3), un premier canal de refroidissement (12), contigu à des surfaces de délimitation (6) de la cabine intérieure (2), et un second canal de refroidissement (23) étant réalisés séparément l'un de l'autre à l'extérieur.
EP07724601A 2006-05-19 2007-04-26 Armoire électrique munie de deux canaux de refroidissement Withdrawn EP2018690A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006024682A DE102006024682B4 (de) 2006-05-19 2006-05-19 Geräteschrank mit zwei Kühlkanälen und Anordnung mit dem Geräteschrank
PCT/EP2007/003671 WO2007134695A1 (fr) 2006-05-19 2007-04-26 Armoire électrique munie de deux canaux de refroidissement

Publications (1)

Publication Number Publication Date
EP2018690A1 true EP2018690A1 (fr) 2009-01-28

Family

ID=38442617

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07724601A Withdrawn EP2018690A1 (fr) 2006-05-19 2007-04-26 Armoire électrique munie de deux canaux de refroidissement

Country Status (4)

Country Link
US (1) US8072752B2 (fr)
EP (1) EP2018690A1 (fr)
DE (1) DE102006024682B4 (fr)
WO (1) WO2007134695A1 (fr)

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Also Published As

Publication number Publication date
DE102006024682A1 (de) 2008-01-03
WO2007134695A1 (fr) 2007-11-29
DE102006024682B4 (de) 2008-12-04
US8072752B2 (en) 2011-12-06
US20090296321A1 (en) 2009-12-03

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