CN110446416B

CN110446416B - Electromagnetic compatibility box

Info

Publication number: CN110446416B
Application number: CN201910853275.2A
Authority: CN
Inventors: 窦慧; 李洪亮
Original assignee: Shandong Institute for Product Quality Inspection
Current assignee: Shandong Institute for Product Quality Inspection
Priority date: 2019-09-10
Filing date: 2019-09-10
Publication date: 2020-04-07
Anticipated expiration: 2039-09-10
Also published as: CN110446416A

Abstract

The invention provides an electromagnetic compatible box, which comprises an outer box and an inner box arranged in the outer box, wherein a shielding cavity is arranged between the outer box and the inner box, a plurality of partition plates are arranged in the shielding cavity, the shielding cavity is divided into a plurality of sub shielding cavities by the plurality of partition plates, and a shielding layer is filled in each sub shielding cavity; a horizontal partition plate is arranged in the inner box, and the inner box is divided into an upper heat dissipation cavity and a lower installation cavity by the partition plate. The invention has the beneficial effects that: this application not only can strengthen the structural strength of electromagnetism holding box, possesses good electromagnetic compatibility shielding function moreover, is applicable to the shielding of various electromagnetic waves, possesses rain-proof heat dissipation function simultaneously to can prevent effectively that the dust from causing harmful effects to the electric or electronic equipment of installation at the heat dissipation in-process.

Description

Electromagnetic compatibility box

Technical Field

The invention relates to the technical field of electromagnetic compatibility, in particular to an electromagnetic compatibility box.

Background

Electromagnetic compatibility various electric or electronic equipment can meet the normal working capacity of design requirements with a specified safety factor in a space with a complex electromagnetic environment, and the meaning of the equipment is also called electromagnetic compatibility and comprises: firstly, electronic systems or devices are compatible with each other in an electromagnetic environment; and secondly, the electronic system or the equipment can normally work according to the design requirement in the natural electromagnetic environment.

However, conventional emc shielding devices typically use only one metal plate to form the shielding cavity. Because the structure is simple, the electromagnetic shielding device is only suitable for low-frequency electromagnetic shielding, often cannot pass an electromagnetic compatibility test, and is easy to cause electromagnetic interference with other electromagnetic equipment in practical use. Therefore, the conventional shielding structure has not been able to satisfy the shielding requirements in the complicated electromagnetic environment.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides an electromagnetic compatible box.

The invention is realized by the following technical scheme:

the invention provides an electromagnetic compatible box, which comprises an outer box and an inner box arranged in the outer box, wherein a shielding cavity is arranged between the outer box and the inner box, a plurality of partition plates are arranged in the shielding cavity, the shielding cavity is divided into a plurality of sub shielding cavities by the plurality of partition plates, and a shielding layer is filled in each sub shielding cavity;

a horizontal partition plate is arranged in the inner box, the partition plate divides the inner box into an upper heat dissipation cavity and a lower installation cavity, two ventilation openings are symmetrically arranged on the partition plate, and a suction fan used for pumping air in the upper heat dissipation cavity into the lower installation cavity so as to enable air in the lower installation cavity to enter the upper heat dissipation cavity through the other ventilation opening for circulation is arranged on one ventilation opening;

the heat dissipation device comprises an upper heat dissipation cavity, an inner box, a partition plate and an outer box, wherein a horizontal heat absorption plate is arranged in the upper heat dissipation cavity, a heat conduction plate is arranged at the upper end of the heat absorption plate, the heat conduction plate sequentially penetrates through the inner box, the partition plate and the outer box, a heat dissipation plate is connected to one end, extending out of the outer box, of the heat conduction plate, and heat dissipation fins are arranged on the.

Preferably, each partition plate is fixedly connected with the inner wall of the outer box and the outer wall of the inner box in a mutually perpendicular mode.

Preferably, the shielding layer comprises a glass fiber layer, a plastic layer plated with metal on two sides, an electromagnetic absorption layer, a plastic layer plated with metal on two sides, and a glass fiber layer from inside to outside in sequence.

Preferably, the heat conducting plates are fixedly connected with the heat absorbing plate and the heat radiating plate in a mutually perpendicular mode, and the number of the heat conducting plates is equal to that of the partition plates at the upper end of the inner box.

Preferably, the partition plate is of a hollow structure, the heat conducting plate penetrating through the partition plate at the upper end of the inner box is a metal plate with a conductive effect, and conductive foam is filled in other partition plates.

Preferably, a rain shelter is arranged at the upper end of the outer box, heat dissipation holes are formed in the front side and the rear side of the rain shelter respectively, and a heat dissipation fan is installed on the heat dissipation holes in the front side of the rain shelter.

In the above-mentioned embodiment, this application not only can strengthen the structural strength of electromagnetism compatible case, possesses good electromagnetic compatibility shielding function moreover, is applicable to the shielding of various electromagnetic waves, possesses rain-proof heat dissipation function simultaneously to can prevent effectively that the dust from causing harmful effects to the electric or electronic equipment of installation in the heat dissipation process.

Drawings

FIG. 1 is a schematic view of the inner and outer cases according to an embodiment of the present invention;

fig. 2 is a first overall structural schematic diagram of an electromagnetic compatible box provided by the embodiment of the invention;

fig. 3 is a second overall structural schematic diagram of the electromagnetic compatible box provided by the embodiment of the invention;

fig. 4 is a third overall structural schematic diagram of the electromagnetic compatible box according to the embodiment of the present invention.

In the figure: 1-outer box; 2-an inner box; 3-shielding the cavity; 4-a partition plate; 5-a separator; 6-upper heat dissipation cavity; 7-lower mounting cavity; 8-a vent; 9-an exhaust fan; 10-a heat absorbing plate; 11-a heat-conducting plate; 12-a heat sink; 13-heat dissipation fins; 14-a heat dissipation fan; 15-a rain shelter; 16-heat dissipation holes; 17-dust screen.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

To facilitate understanding of the electromagnetic compatible box provided in the embodiments of the present invention, first, an application scenario of the electromagnetic compatible box provided in the embodiments of the present application will be described, where the electromagnetic compatible box provided in the embodiments of the present application is used for installing electrical or electronic equipment, so that the electric or electronic equipment can normally work in a space with a complex electromagnetic environment and with a specified safety factor to meet the design requirement, however, the traditional electromagnetic compatibility shielding device usually only uses a layer of metal plate to make a shielding cavity, because the structure is simple, the electromagnetic shielding device is only suitable for low-frequency electromagnetic shielding and often cannot pass electromagnetic compatibility tests, in practical use, the electromagnetic shielding structure is easy to cause electromagnetic interference with other electromagnetic equipment, so that the traditional shielding structure cannot meet the shielding requirement under a complex electromagnetic environment, and the electromagnetic compatible box is provided for solving the problems.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of an inner box and an outer box according to an embodiment of the present invention, and fig. 2 is a schematic structural diagram of a first whole of an electromagnetic compatible box according to an embodiment of the present invention.

As shown in fig. 1 and 2, this electromagnetic compatibility case includes outer container 1 and sets up inner box 2 in outer container 1, has the clearance between outer container 1 and the inner box 2, the clearance forms shielding chamber 3, is provided with a plurality of division boards 4 in the shielding chamber 3, the equal mutually perpendicular's of the inner wall of every division board 4 and outer container 1 and the outer wall of inner box 2 fixed connection, a plurality of division boards 4 will shield chamber 3 and separate for a plurality of sub-shielding chamber, and it has the shielding layer to fill in every sub-shielding chamber, the shielding layer includes glass fiber layer, two-sided metallic coating plastic layer, electromagnetic absorption layer, two-sided metallic coating's plastic layer, glass fiber layer from inside to outside in proper order.

This application is through division board 4 that sets up between outer container 1 and the inner box 2, can strengthen the structural strength of outer container 1 and inner box 2, through the shielding layer that sets up, this electromagnetism compatible structural strength of case also can be strengthened to a certain extent to two-layer glass fiber layer, and the electromagnetic wave can be absorbed again effectively to the electromagnetic absorption layer, the electromagnetic wave can be reflected to two-sided metallic coating plastic layer, make external electromagnetic wave can not get into, inside electromagnetic wave can not the external radiation, can possess good electromagnetic compatibility shielding function, be applicable to the shielding of various electromagnetic waves.

Continuing to refer to fig. 2, a horizontal partition plate 5 is arranged in the inner box 2, four sides of the partition plate 5 are fixedly connected with four inner walls of the inner box 2 correspondingly, the partition plate 5 divides the inner box 2 into an upper heat dissipation cavity 6 and a lower installation cavity 7, two ventilation openings 8 are symmetrically arranged on the partition plate 5, and a suction fan 9 for pumping air in the upper heat dissipation cavity 6 to the lower installation cavity 7 so that air in the lower installation cavity 7 enters the upper heat dissipation cavity 6 through the other ventilation opening 8 to circulate is arranged on one ventilation opening 8.

In addition, be provided with horizontally absorber plate 10 in last heat dissipation chamber 6, the fixed connection that four sides of absorber plate 10 and four inner walls of inner box 2 correspond, absorber plate 10 upper end is provided with heat-conducting plate 11, heat-conducting plate 11 passes inner box 2 in proper order, division board 4 and outer box 1, and the one end that heat-conducting plate 11 extends and wears out outer box 1 is connected with heating panel 12, heat-conducting plate 11 and absorber plate 10 and the fixed connection of heating panel 12 mutually perpendicular, and the quantity of heat-conducting plate 11 is the same with the quantity of division board 4 of inner box 2 upper end, be provided with radiating fin 13 on heating panel 12, heat dissipation panel 12 and radiating fin 13 dispel the heat that heat-conducting plate 11 conducts, play radiating effect.

In this embodiment, the lower mounting cavity 7 is used for mounting electric or electronic equipment, the electric or electronic equipment generates heat when working, the pumping fan 9 is mounted on one of the ventilation openings 8, and pumps air in the upper heat dissipation cavity 6 into the lower mounting cavity 7, so that the air in the lower mounting cavity 7 enters the upper heat dissipation cavity 6 through the other ventilation opening 8 to circulate, after the air in the lower mounting cavity 7 enters the upper heat dissipation cavity 6 through the other ventilation opening 8, the air flows through the lower surface of the heat absorbing plate 10, the heat in the air is absorbed by the heat absorbing plate 10, thereby achieving the purpose of cooling the air in the lower mounting cavity 7, the heat absorbed by the heat absorbing plate 10 is conducted to the heat dissipation plate 12 through the heat conduction plate 11, and finally the conducted heat is dissipated through the heat dissipation plate 12 and the heat dissipation fins 13.

In this embodiment, the partition plate 4 is a hollow structure, the heat conducting plate 11 penetrating through the partition plate 4 at the upper end of the inner box 2 is a metal plate with a conductive effect, specifically, it can be an aluminum alloy plate, and the other partition plates 4 are filled with conductive foam, which helps to further improve the shielding effect of the electromagnetic compatible box. The heat-conducting plate 11 in this application can correspond and set up the rectangular hole that supplies heat-conducting plate 11 to pass respectively on inner box 2 and outer container 1 in the position that passes inner box 2 and outer container 1, and absorber plate 10 and heating panel 12 in this application also are aluminium alloy plate, and radiating fin 13 is aluminium alloy sheet.

Please refer to fig. 3, a canopy 15 is disposed on the upper end of the outer box 1, the canopy 15 covers the upper end of the whole outer box 1, heat dissipation holes 16 are respectively disposed on the front and rear sides of the canopy 15, heat dissipation fans 14 are installed on the heat dissipation holes 16 on the front side of the canopy 15, the heat dissipation fans 14 are used for supplying air into the canopy 15, under the action of the heat dissipation fans 14, the air blown into the canopy 15 flows through the heat dissipation fins 13 and is discharged from the heat dissipation holes 16 on the rear side of the canopy 15, so as to accelerate the heat dissipation speed of the heat dissipation fins 13, and in the whole process, dust cannot enter the lower installation cavity 7 of the inner box 2, thereby preventing the dust from causing adverse effects on the electric or electronic devices installed in the lower installation cavity 7.

In an embodiment, please refer to fig. 4, when the heat dissipation fan 14 works, in order to prevent external dust from entering the canopy 15, dust screens 17 are respectively disposed outside the heat dissipation holes 16 at the front and rear sides of the canopy 15, and the dust screens 17 on the heat dissipation holes 16 at the rear side of the canopy 15 are set as metal screens to achieve the purpose of assisting heat dissipation.

In another embodiment, a downward-inclined canopy edge (not shown) is provided at the upper end of each of the front and rear sides of the canopy 15, and the canopy edge is provided to function as: preventing rainwater from entering the heat dissipation holes 16 to damage the heat dissipation fan 14.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An electromagnetic compatible box comprising: the shielding device comprises an outer box and an inner box arranged in the outer box, wherein a shielding cavity is formed between the outer box and the inner box, a plurality of partition plates are arranged in the shielding cavity, the shielding cavity is divided into a plurality of sub shielding cavities by the plurality of partition plates, and a shielding layer is filled in each sub shielding cavity; the heat dissipation device is characterized in that a horizontal partition plate is arranged in the inner box, the partition plate divides the inner box into an upper heat dissipation cavity and a lower installation cavity, two ventilation openings are symmetrically arranged on the partition plate, and a suction fan used for pumping air in the upper heat dissipation cavity into the lower installation cavity so that the air in the lower installation cavity enters the upper heat dissipation cavity through the other ventilation opening to circulate is arranged on one ventilation opening; the heat dissipation device comprises an upper heat dissipation cavity, an inner box, a partition plate and an outer box, wherein a horizontal heat absorption plate is arranged in the upper heat dissipation cavity, a heat conduction plate is arranged at the upper end of the heat absorption plate, the heat conduction plate sequentially penetrates through the inner box, the partition plate and the outer box, a heat dissipation plate is connected to one end, extending out of the outer box, of the heat conduction plate, and heat dissipation fins are arranged on the.

2. The electromagnetic compatible box according to claim 1, wherein each of the partition plates is fixedly connected to the inner wall of the outer box and the outer wall of the inner box perpendicularly to each other.

3. The electromagnetic compatible box according to claim 1, characterized in that said shielding layer comprises, in order from the inside to the outside, a glass fiber layer, a double-sided metallized plastic layer, an electromagnetic absorbing layer, a double-sided metallized plastic layer, a glass fiber layer.

4. The electromagnetic compatible box according to claim 1, wherein the heat conductive plates are fixedly connected to the heat absorbing plate and the heat radiating plate perpendicularly to each other, and the number of the heat conductive plates is the same as the number of the partition plates at the upper end of the inner box.

5. The electromagnetic compatible box according to claim 1, characterized in that the partition plate is a hollow structure, the heat conducting plate penetrating through the partition plate at the upper end of the inner box is a metal plate with conductive effect, and the other partition plates are filled with conductive foam.

6. The electromagnetic compatible box according to claim 1, wherein a canopy is provided at an upper end of the outer box, heat dissipation holes are respectively provided at front and rear sides of the canopy, and a heat dissipation fan is installed at the heat dissipation hole at the front side of the canopy.