US20130035032A1 - Louvered grill - Google Patents

Louvered grill Download PDF

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Publication number
US20130035032A1
US20130035032A1 US13/261,473 US201113261473A US2013035032A1 US 20130035032 A1 US20130035032 A1 US 20130035032A1 US 201113261473 A US201113261473 A US 201113261473A US 2013035032 A1 US2013035032 A1 US 2013035032A1
Authority
US
United States
Prior art keywords
louvered
louvers
louvered grille
grille
face
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.)
Abandoned
Application number
US13/261,473
Other languages
English (en)
Inventor
Stefan Schneider
Steffen Wagner
Reiner Hartmann
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.)
Rittal GmbH and Co KG
Original Assignee
Rittal GmbH and Co KG
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 Rittal GmbH and Co KG filed Critical Rittal GmbH and Co KG
Assigned to RITTAL GMBH & CO. KG reassignment RITTAL GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SCHNEIDER, STEFAN, WAGNER, STEFFEN, HARTMANN, REINER
Publication of US20130035032A1 publication Critical patent/US20130035032A1/en
Abandoned legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00—Constructional details common to different types of electric apparatus
    • H05K7/20—Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
    • H05K7/20136—Forced ventilation, e.g. by fans
    • H05K7/20181—Filters; Louvers

Definitions

  • the invention relates to a louvered grille for an air conduction housing, comprising a plurality of louvers which are spaced apart from one another to form air passage openings, wherein the louvers extend in the widthwise direction of the louvered grille and have an upper louver face that is directed to the exterior and inclined transversely with respect to the vertical direction of the louvered grille.
  • Louvered grilles of this type are known from the prior art. Louvers are used which extend inclined in the widthwise direction of the louvered grille between two supporting bars. The louvered grilles serve to cover air conduction housings which are inserted into an opening of a switchgear cabinet wall of a switchgear cabinet. The louvered grilles cover the air conduction housing to the exterior to offer a certain mechanical access protection. Rain water may be drained off along the inclined surface of the louvers, so that it cannot reach the interior of the switchgear cabinet. The so-called IP classification determines protection of the louvered grille.
  • the upper louver face of at least some of the louvers has a convex curvature in at least some areas thereof, both in the widthwise direction of the louvered grille and in the vertical direction of the louvered grille.
  • a dual convexly curved surface of the louver results. That convexity results in that an impinging water jet of a steam cleaner is atomized at the louver, so that it loses its kinetic energy. Thus, the strength of the steam jet is broken, and the risk of intruding water is considerably reduced.
  • the louvers are strip-shaped and, starting from a center portion thereof towards the longitudinal ends, slope in the vertical direction.
  • a curved louver shape is provided, wherein water draining off the upper louver face is directed laterally to the edges of the louver.
  • louvers have, at a lower louver face facing away from the upper louver face, a concave curvature in at least some areas thereof. That concave geometry forms a labyrinth-like flow barrier for water.
  • the louvers comprise a barrier wall at the lower louver face thereof, which barrier wall is angled with respect to the lower louver face and extends towards a rear side of the louvered grille.
  • the barrier wall At this barrier wall, intruding water encounters resistance.
  • the barrier wall starting from the center portion of the louvered grille, has a larger dimension in direction of the depth of the louvered grille than at the longitudinal ends thereof.
  • the barrier wall has a larger wall height in the center portion of the louvered grille than in the lateral regions. This measure improves, on the one hand, resistivity against intruding spray water, on the other hand, the louver is effectively stiffened in its center portion, i.e. where the highest tensions within the material may be expected when mechanically stressed.
  • the louvers have an upper edge extending in the widthwise direction of the louvered grille and a lower edge, also extending in the widthwise direction of the louvered grille. It is preferred that these two edges are embodied having curved contours, wherein the radii of the two curved contours are different from one another. Thereby, an improved removal of the water jet is supported. Additionally, the lower curved edge offers a dripping water edge to reliably conduct away flowing water drops without carrying away water droplets formed at the dripping edge by the air jet passing through the air passage openings.
  • a filter mat is provided in the region of the rear face of the louvers which is spaced apart from the louvers, then an expansion space is created behind the louvers. Now, if a water jet penetrates between the louvers through the air passage openings, it is kept bundled between the louvers and then reaches the expansion space. Here, it de-tensions and loses its kinetic energy. The filter mat then offers sufficient resistivity to resist to the broken water jet. Thus, this measure effectively supports IP protection.
  • a mat holder is integrally fitted to the rear face of the louvered grille into which the filter mat is inserted, then functionality of the louvered grille is expanded by simple constructive measures.
  • the mat holder fixes the filter mat with respect to the louvers in a defined manner.
  • a further functional extension may occur in that hinge seats are fitted to the lower face of the louvered grille.
  • the louvered grille may be coupled to hinge pieces of the air filter housing, whereby a hinge axis results around which the louvered grille may be folded down.
  • the rear face of the louvered grille and the interior of the air filter housing may be accessed for purposes of maintenance. For example, a filter mat may be replaced then.
  • An appealing optical design results when it is provided that the hinge seats are covered by a screen extending in the widthwise direction of the louvered grille at a front face thereof.
  • the louvered grille comprises a handled seat into which a handle is pivotably inserted.
  • the handle serves as a locking aid when the louvered grille is situated in its put up operating position. With the aid of the handle, the louvered grille may be unlocked and be moved into a folded down mounting position, for example via the hinge joint to the air filter housing.
  • FIG. 1 a louvered grille in a perspective front view
  • FIG. 2 the louvered grille of FIG. 1 in a front view
  • FIG. 3 a section along III-III illustrated in FIG. 2 ;
  • FIG. 4 a section along IV-IV illustrated in the drawings.
  • FIG. 5 a partial section along V-V illustrated in FIG. 2 .
  • FIG. 1 shows a louvered grille comprising two side parts 10 spaced apart from another.
  • side parts 10 comprise a wall section perpendicular to the rear face of the louvered grille which is embodied as a mat holder 12 .
  • Convexly curved connection sections 11 merge into mat holder 12 which end as angled side walls 15 .
  • Side walls 15 in turn are parallel to mat holder 12 .
  • louvers 30 extend between side parts 10 . They extend between side parts 10 in widthwise direction of the louvered grille. Louvers 30 are embodied as strip-shaped material sections extending transversely to the vertical direction of the louvered grille, i.e. inclined to a rear face of the louvered grille. Louvers 30 are coupled to connecting sections 11 via walls 13 extending vertically to the rear side of the louvered grilles at their longitudinal ends. Louvers 30 are directly coupled to connecting sections 11 at their upper edges. Air passage openings are formed between louvers 11 and side parts 10 . Those air passage openings form an air guiding connection between the rear face of the louvered grille and the front face of the louvered grille.
  • a bar 14 is formed to louvers 30 in the middle portion between the two side parts 10 . That bar interconnects individual louvers 30 and thus serves for mechanical stiffening.
  • the louvered grille is, at its upper horizontal edge, finalized by means of a transfer bar 19 having a convexly curved surface.
  • Transverse bar 19 connects the two side parts 10 .
  • Another transverse bar 18 . 2 is arranged at the lower horizontal edge of the louvered grille, also interconnecting both side bars 10 .
  • Transverse bar 18 . 2 comprises a screen 18 . 1 optically covering hinge seats 16 to the front face of the louvered grille.
  • a terminal wall 17 is formed at screen 18 . 1 which is perpendicular to the rear face of the louvered grille.
  • a handle seat 20 is formed into the louvered grille into which a handle 21 may be snapped in, wherein handle 21 may be pivoted around a horizontal pivot axis with respect to the louvered grille between a locking position and an unlocking position.
  • Handle 21 comprises a manipulator 22 which is accessible via a handle recess 23 . Handle 21 may be gripped at manipulator 22 and can be unlocked.
  • louvered grille is illustrated without handle 21 , so that handle seat 20 may be clearly recognized.
  • FIG. 3 shows a section along III-III illustrated in FIG. 2 .
  • bar 14 connects as a stiff wall all louvers 30 and is coupled to upper and lower transverse bars 19 , 18 . 2 at its longitudinal ends.
  • mat holder 12 is formed by four wall pieces which are vertical to the rear face of the louvered grille as a continuous frame.
  • a filter mat may be inserted into mat holder 12 . The filter mat abuts at bar 14 with its front face and is thereby kept spaced apart to the rear faces of the louvers 30 .
  • louvers 30 have an upper louver face 31 and a lower louver face 32 .
  • a barrier wall 33 is formed to the upper horizontal edge of louvers 30 , which barrier wall is vertical to the rear face of the louvered grille and extends towards the rear face of the louvered grille.
  • Air passage openings are formed between the individual louvers 30 .
  • both the upper louver side 31 and the lower louver side 32 are curved. Thereby, upper louver side 31 has a convex curvature and lower louver face 32 has a concave curvature.
  • Upper louver face 31 has a concave curvature extending in the vertical direction of the louvered grille with a transverse radius R 3 , as illustrated in FIG. 4 .
  • Lower louver face 32 has a concave curvature also extending in the vertical direction of the louvered grille.
  • upper louver faces comprise a further convexity. This convexity extends in widthwise direction of the louvered grille, as may be seen in FIG. 5 .
  • upper louver face 31 has a convex curvature which extends as a circular bend between side parts 10 . As illustrated in FIG.
  • louvers 30 form a curved contour having an inner radius R 2 .
  • the lower edges of louvers 30 form a circular arc having an outer radius R 3 .
  • louvers 30 are convexly curved both in widthwise direction of the louvered direction and in the vertical direction of the louvered grille, and a dual crowned vertical curvature of louvers 30 results providing for radial atomization of a vertically impinging water jet onto louver 30 and thus improves IP protection. IP protection is further improved with the aid of barrier wall 33 . When a water jet of a steam cleaner is guided through the air passage openings, it directly impinges onto barrier wall 33 and is broken up.
  • FIG. 4 illustrating the louvered grille in its vertical operating position, the water flows in the direction of gravity and impinges onto the lower horizontal mat holder 12 .
  • An exit opening is formed between lower horizontal louver 30 and convexly curved transverse bar 18 . 2 through which draining water is discharged via screen 18 . 1 to the outer face of the louvered grille.
  • transverse bar 18 . 2 is in its exterior view adapted to the design of the upper louver face 31 and has an identical contour.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Specific Sealing Or Ventilating Devices For Doors And Windows (AREA)
  • Air-Flow Control Members (AREA)
US13/261,473 2010-04-19 2011-03-15 Louvered grill Abandoned US20130035032A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102010016505A DE102010016505A1 (de) 2010-04-19 2010-04-19 Lamellengitter
DE102010016505.0 2010-04-19
PCT/EP2011/053898 WO2011131425A1 (de) 2010-04-19 2011-03-15 Lamellengitter

Publications (1)

Publication Number Publication Date
US20130035032A1 true US20130035032A1 (en) 2013-02-07

Family

ID=44368257

Family Applications (1)

Application Number Title Priority Date Filing Date
US13/261,473 Abandoned US20130035032A1 (en) 2010-04-19 2011-03-15 Louvered grill

Country Status (6)

Country Link
US (1) US20130035032A1 (de)
EP (1) EP2561740B1 (de)
CN (1) CN102948270B (de)
DE (1) DE102010016505A1 (de)
ES (1) ES2526391T3 (de)
WO (1) WO2011131425A1 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130067875A1 (en) * 2010-04-19 2013-03-21 Rittal Gmbh & Co. Kg Filter unit for a switchgear cabinet
USD739928S1 (en) 2014-01-23 2015-09-29 Hoffman Enclosures, Inc. Air conditioner cover
USD803365S1 (en) 2015-09-29 2017-11-21 Hoffman Enclosures, Inc. Air conditioner
US10512866B2 (en) 2016-02-16 2019-12-24 Hoffman Enclosures, Inc. Filter housing for filter fan
US10631688B2 (en) 2017-04-27 2020-04-28 MULTIPOND Wägetechnik GmbH Grid flap
US10960334B2 (en) * 2017-10-26 2021-03-30 Jeffrey Corbett Magnetic closure system for HVAC filter grilles and method of use
US11890651B2 (en) 2019-10-24 2024-02-06 Andreas Stihl Ag & Co. Kg Venting device with splash guard and power tool with such a venting device

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106731261A (zh) * 2016-11-25 2017-05-31 广东百能堡科技有限公司 一种新型过滤网组件结构
CN110333322B (zh) * 2019-07-31 2022-01-21 安徽天分仪表有限公司 一种防爆型氧化锆氧探头

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19700065A1 (de) * 1996-11-15 1998-05-28 Pfannenberg Otto Gmbh Filterlüfter oder Austrittsfilter
US20030026074A1 (en) * 2001-07-31 2003-02-06 Clements Bradley E. Externally mounted on-line replaceable fan module
DE10350294B4 (de) * 2002-10-24 2007-12-20 Decoma (Germany) Gmbh Kühlergrillanordnung für ein Kraftfahrzeug
US7827816B2 (en) * 2006-05-09 2010-11-09 Carrier Corporation Front cover for transport refrigeration unit

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2851981A (en) * 1952-12-17 1958-09-16 Lester L Smith Method of making louvered panels
US2820407A (en) * 1954-07-28 1958-01-21 Lester L Smith Louver type ventilator
DE29622662U1 (de) * 1996-03-13 1997-04-10 Siemens Nixdorf Inf Syst Lüfteranordnung für in einem Schrank angeordnete Funktionseinheiten
ITBO20030046U1 (it) * 2003-04-18 2004-10-19 Azerre S A Armadio integrato per i servizi di una centrale di telecomunicazione
DE202006005673U1 (de) * 2006-04-05 2006-06-08 Pfannenberg Gmbh Abdeckvorrichtung für den vorderen Bereich einer Luftdurchtrittseinrichtung sowie Luftdurchtrittseinrichtung
CN201038630Y (zh) * 2007-04-03 2008-03-19 李达 通用机械用高压变频组合柜
ES2442001T3 (es) * 2008-08-07 2014-02-07 Nokia Solutions And Networks Oy Carcasa para alojar componentes electrónicos y elemento de red y conducto de aire

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19700065A1 (de) * 1996-11-15 1998-05-28 Pfannenberg Otto Gmbh Filterlüfter oder Austrittsfilter
US20030026074A1 (en) * 2001-07-31 2003-02-06 Clements Bradley E. Externally mounted on-line replaceable fan module
DE10350294B4 (de) * 2002-10-24 2007-12-20 Decoma (Germany) Gmbh Kühlergrillanordnung für ein Kraftfahrzeug
US7827816B2 (en) * 2006-05-09 2010-11-09 Carrier Corporation Front cover for transport refrigeration unit

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130067875A1 (en) * 2010-04-19 2013-03-21 Rittal Gmbh & Co. Kg Filter unit for a switchgear cabinet
US9237674B2 (en) * 2010-04-19 2016-01-12 Rittal Gmbh & Co. Kg Filter unit for a switchgear cabinet
USD739928S1 (en) 2014-01-23 2015-09-29 Hoffman Enclosures, Inc. Air conditioner cover
USD803365S1 (en) 2015-09-29 2017-11-21 Hoffman Enclosures, Inc. Air conditioner
US10512866B2 (en) 2016-02-16 2019-12-24 Hoffman Enclosures, Inc. Filter housing for filter fan
US10631688B2 (en) 2017-04-27 2020-04-28 MULTIPOND Wägetechnik GmbH Grid flap
US10960334B2 (en) * 2017-10-26 2021-03-30 Jeffrey Corbett Magnetic closure system for HVAC filter grilles and method of use
US11890651B2 (en) 2019-10-24 2024-02-06 Andreas Stihl Ag & Co. Kg Venting device with splash guard and power tool with such a venting device

Also Published As

Publication number Publication date
CN102948270B (zh) 2015-04-29
CN102948270A (zh) 2013-02-27
DE102010016505A1 (de) 2011-10-20
WO2011131425A1 (de) 2011-10-27
EP2561740A1 (de) 2013-02-27
EP2561740B1 (de) 2014-11-19
ES2526391T3 (es) 2015-01-12

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Legal Events

Date Code Title Description
AS Assignment

Owner name: RITTAL GMBH & CO. KG, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:SCHNEIDER, STEFAN;WAGNER, STEFFEN;HARTMANN, REINER;SIGNING DATES FROM 20120827 TO 20120829;REEL/FRAME:029753/0683

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION