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
  • H02B1/26—Casings; Parts thereof or accessories therefor
  • H02B1/28—Casings; Parts thereof or accessories therefor dustproof, splashproof, drip-proof, waterproof or flameproof
• • 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

Definitions

• the present invention relates to the technical field of electrical cabinets intended for applications in hazardous environments.
• risk environments means mainly environments, mainly industrial, presenting risks of fire, explosion and / or electric shocks.
• environments means mainly environments, mainly industrial, presenting risks of fire, explosion and / or electric shocks.
• SEVESO zones well known to those skilled in the art.
• a heat removal technique consists in equipping the electrical cabinet with one or more heat dissipation means, such as a radiator for example.
• the radiators used generally have a plurality of heat exchange fins, and are affixed against one of the internal walls of the cabinet so as to dissipate the internal heat. This heat is in particular transferred to the fins and then transferred to the wall to the outside of the cabinet.
• the invention tends to provide an electrical cabinet for applications in hazardous environments that allows to contain electrical components in an efficient manner so that their potential power is increased.
• An objective of the electrical cabinet according to the invention is to dissipate optimally the heat generated by the electrical components inside said cabinet, while maintaining the characteristics of robustness of the steel.
• Another object of the invention is to provide such a cabinet which is not heavier and more cumbersome than an electrical cabinet for risk environments of the state of the art.
• an electrical cabinet has been developed for applications in hazardous environments.
• Said cabinet comprises at least one upper wall, one bottom wall, one front wall, one bottom wall and two side walls, assembled to each other so as to create a sealed and explosion-proof enclosure.
• the cabinet comprises:
• At least one aluminum heat dissipating means comprising a plurality of heat exchange fins projecting from a support plate, said fins being engaged inside the opening so as to communicate with the outside of the cabinet, said support plate being fixed inside the cabinet and on the wall so as to close the opening, and; an explosion-proof seal arranged between the support plate and the wall of the cabinet so as to seal the enclosure.
• the heat generated inside the cabinet is dissipated in an optimal way. Indeed, the heat is transferred to the aluminum plate of the heat dissipation means. This heat transfer is optimal given the good thermal conductivity of aluminum, especially higher than that of steel.
• This heat is then transferred to the fins which are in communication with the outside of the cabinet to be cooled.
• These fins are made of aluminum and offer a large area of heat exchange to effectively dissipate the heat present in the enclosure.
• the heat dissipation means is aluminum and is therefore relatively light.
• the cabinet according to the invention is therefore no heavier than a cabinet of the state of the art.
• the perforated portion of the wall which has the opening further lighten the cabinet.
• the cabinet according to the invention is lighter than that of the state of the art and allows a better dissipation of the heat generated by electrical components. In this way, the risks of overheating are reduced, and the performance of the electrical components are not impaired.
• the cabinet according to the invention has a greater potential power than that of the state of the art. A power potential equal to that of the state of the art, the cabinet according to the invention can be lightened and reduced in size.
• the cabinet comprises a protective casing fixed to the outside of the cabinet so as to cover the opening and to protect the fins of heat exchange.
• the housing has two openings allowing air circulation, especially by convection, inside said housing.
• one of the openings of the housing is a lower opening and the other of the openings is an upper opening.
• the circulation of air is thus more efficient and therefore the heat dissipation is optimal. It follows that the potential power of the cabinet is increased or that the cabinet can be lightened and reduced in size.
• FIG. 1 is a diagrammatic representation in perspective of an electrical cabinet according to the invention
• Figure 2 is a schematic representation of an electrical cabinet similar to that of Figure 1, the front wall of the cabinet being open;
• FIG. 3 is an exploded schematic representation of a heat dissipation means implemented in the invention, and one of the walls of the cabinet.
• said cabinet (1) comprises at least one upper wall (2), one bottom wall (3), one front wall (4), a bottom wall (5) and two side walls (6).
• These walls (2, 3, 4, 5 and 6) are in particular made of steel and have a substantial thickness, for example 8 cm thick, contributing to the weight of such a cabinet. These walls are assembled to each other so as to create a chamber (7) with a sealed and explosion-proof atmosphere for receiving electrical components (8).
• the sealed enclosure (7) must be able to resist fires, explosions and / or electric shocks or any other risk.
• the enclosure (7) must isolate the electrical components (8) optimally and safely to meet the ATEX and SEVESO regulations well known to those skilled in the art.
• the electrical components (8) confined in the cabinet (1) generate heat by Joule effect. This heat impairs the efficiency and performance of the electrical components (8) and therefore decreases the potential power of the electrical cabinet (1).
• the cabinet (1) therefore integrates at least one heat dissipation means (9).
• at least one opening (10) is formed in one of the walls (2, 3, 4, 5, and 6) of said electrical cabinet (1).
• the cabinet (1) has three openings
• the heat dissipation means (9) are aluminum and each comprise a plurality of heat exchange fins (11) projecting from a support plate (12).
• Each of the three dissipation means (9) has its fins (11) engaged inside one of the openings (10) so that said heat exchange fins (11) communicate with the outside of the cabinet (1).
• each dissipation means (9) are fixed inside the cabinet (1) and on the corresponding wall so as to close off the corresponding opening (10).
• An explosion-proof seal (not shown) is arranged between the support plate (12) and the wall of the cabinet (1) so as to seal the enclosure (7).
• the housings (13) are for example in the form of a steel plate (13a) fixed by means of fixing ribs (13b) projecting from the wall of the cabinet (1) in the vicinity of the opening (10).
• the protective casings (13) are particularly open at their upper (14) and lower (15) so as to create a chimney effect and a circulation of air to further dissipate the heat of the heat exchange fins (11). ).
• the electrical components (8) confined in the cabinet (1) can be directly attached to the support plate (12) of the heat dissipation means (9) so as to dissipate all the more effectively the heat generated by said electrical components (8).
• the heat generated by the electrical components (8) is transferred to the support plate (12) of aluminum.
• the heat is then dissipated from the support plate (12) to the heat exchange fins (11) which are, in turn, in communication with the outside of the cabinet (1).
• the heat is dissipated by said fins (11) which form a large heat exchange surface with the outside of the cabinet (1).
• the air flow generated by the casing (13) improves this dissipation of heat by a chimney effect. Indeed, the hot air is discharged through the upper opening (14) of the housing (13) and cold air is thus sucked by the lower opening (15) of the housing (13), which cold air dissipates the heat of heat exchange fins (11).
• the cabinet (1) therefore has an increased potential power compared to the cabinets of the state of the art for an equal volume of the enclosure (7).
• the cabinet (1) according to the invention can be lightened and reduced in size compared to that of the state of the art.

Landscapes

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

Priority Applications (1)

Applications Claiming Priority (2)

Publications (1)

Family

ID=51352550

Family Applications (1)

Country Status (3)

Cited By (7)

Families Citing this family (5)

Citations (5)

Family Cites Families (2)

• 2014
  • 2014-04-10 FR FR1453177A patent/FR3019944B1/fr active Active
• 2015
  • 2015-02-23 EP EP15709724.7A patent/EP3130046A1/de not_active Ceased
  • 2015-02-23 WO PCT/FR2015/050432 patent/WO2015155426A1/fr active Application Filing

Patent Citations (5)

Also Published As

Similar Documents

Legal Events