Heat exchange – With retainer for removable article – Electrical component
Patent
1998-12-11
2000-07-04
Joyce, Harold
Heat exchange
With retainer for removable article
Electrical component
165129, 165131, 174 161, 361697, H05K 720
Patent
active
060824417
DESCRIPTION:
BRIEF SUMMARY
The invention relates to an equipment cabinet, particularly a switch and control cabinet, for electrical and electronic systems with a functional area sealed in dustproof and watertight manner, having at least one door closing in dustproof and watertight manner. In the same structural form and equipment, the equipment cabinet is suitable for external use in widely differing climatic zones, e.g. temperate, arctic, subtropical and tropical zones.
Equipment cabinets are e.g. known from the publication by Gottfried Klingberg "Schaltschdrank und Gehause-Klimatisierung", (switch cabinet and case climatization), Mahling Werbung, Dusseldorf.
With the aim of ensuring a permanent, faultless operation of the electrical and electronic systems in the case of variable external climatic conditions, as a function of the functional area climatic requirements equipment cabinets are designed therein in such a way that by heat dissipation via the cabinet surface and/or by heat transfer means, the exceeding of a maximum permitted functional area temperature is prevented and the dropping below a minimum function area temperature is prevented by heaters.
DE 295 19 260 U1 discloses a weatherproof electronic equipment cabinet for installation in the open and which is at least-partly enveloped by a removable cover spaced from the outer faces of the electronic switch cabinet. The thus formed gap is linked to the external air. In the case of strong insolation, the cover is intended to reduce heating and, at low temperatures, the cooling of the cabinet.
DE-AS 11 35 065 discloses the adjustment of the air supply to the interior of the equipment by means of air openings in the equipment wall, whose cross-section is variable.
DD 212 871 is based on a known arrangement for removing heat from closed cases, in which equipment producing heat losses are arranged in several planes, which contains a heat exchanger constructed as a door, wall or part of a door or wall and through which flows the heated internal air in an internal circuit and cool external air in an external circuit, together with at least two fans, a channel being formed by a cover in the internal circuit. In order to ensure a planned heat removal from subassemblies, the inner space is subdivided by horizontal partitions into separate circuits, which are connected to the heat exchanger and equipped with separate fans.
Even in the case of relatively low internal heat loads, despite a clearly positive difference between the maximum permitted functional area temperature and the maximum external air temperature, in the known cabinets the load removal (cabinet cooling) is only possible through additional technical means, such as e.g. air-air heat transfer means, air-water coolers, refrigerating machines, etc. The fault susceptibility, as well as operational and maintenance costs of such equipment are comparatively high.
It is also disadvantageous that the function area is occupied by said coolers and it is also disadvantageous to have to constructionally adapt the functional area to the requirements of the coolers.
The object of the invention is to so arrange substantially maintenance-free elements with the components which are in any case required for the other equipment cabinet functions in such a way that in particular the "passive cooling" for the operating area is increased compared with known equipment cabinet constructions, whilst reducing maintenance and operating costs and it is also ensured that the functional area is not occupied by coolers.
According to the invention, this object is achieved with the features of claim 1. Advantageous further developments form the subject matter of subclaims 2 to 13.
It is essential to the invention that certain surface areas are so constructed in multishell manner that there is a formation on the inside and outside of channel-like spaces, relative to the functional area wall. Depending on the load situation, said channel-like spaces can be more or less intensively supplied with air or sealed in a substantially airtight manner, so that apa
REFERENCES:
patent: 5263537 (1993-11-01), Plucinski et al.
patent: 5467250 (1995-11-01), Howard et al.
patent: 5513071 (1996-04-01), LaViolette et al.
patent: 5529120 (1996-06-01), Howard et al.
Boehmer Peter
Bretschneider Rainer
Hoenisch Herbert
Joyce Harold
Knuerr-Mechanik Fuer Die Elektronik Aktiengellschaft
LandOfFree
Cabinet for electric and electronic systems does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cabinet for electric and electronic systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cabinet for electric and electronic systems will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1477569