Ventilation and heat dissipation device with high protection grade

Abstract

The utility model relates to the technical field of internal heat dissipation of power distribution (box) cabinets, frequency converters and other easily-heated equipment, in particular to a high-protection-grade ventilation and heat dissipation device which comprises a top cover, a base, a filtering device and a fan. Base drainage grooves are formed in the base annular baffles respectively, the base drainage grooves of the adjacent base annular baffles do not coincide, a top cover middle baffle is arranged in the top cover, the top cover middle baffle and the base annular baffles are concentrically arranged, the top cover middle baffle is located between the two adjacent base annular baffles, and the lower edge of the top cover middle baffle is lower than the upper edges of the base annular baffles; air flow generated by the fan passes through the filtering device and the middle ventilation opening and then is discharged through the exhaust and drainage hole, and the filtering device comprises a one-way ventilation net. According to the utility model, a plurality of layers of annular baffle plates which are inserted in a staggered manner are arranged to form a labyrinth-type drainage channel, thereby effectively preventing external water from entering the power distribution cabinet.

Description

Technical Field

[0001] The utility model relates to the technical field of internal heat dissipation of distribution (box) cabinets, frequency converters and other heat-generating devices, in particular to a ventilation and heat dissipation device with a high protection level. Background Art

[0002] Due to its excellent protection performance, distribution boxes with a high protection level are widely used in various harsh environments. For example, in dusty and humid environments such as mines and rail transit, distribution boxes with a high protection level can prevent the intrusion of dust and water, ensuring the stability of electrical equipment and the safety of personnel. With the continuous progress of technology, the power density of electronic devices, mechanical systems and industrial processes is getting higher and higher, and they generate more heat during operation. If not controlled, these heats will cause the equipment to overheat, thus affecting performance, shortening the service life, and even causing safety problems; in order to reduce heat and lower the temperature, it is necessary to increase the heat dissipation ventilation device. The highest protection level of the existing heat dissipation devices for distribution cabinets on the market is IP55. While adding the heat dissipation ventilation device, the protection level of the original high-protection box body is reduced. In humid and dusty environments, some dust or water will enter, which will have a certain impact on the performance of precision components. Content of the Utility Model

[0003] The utility model aims to solve the above problems and provides a ventilation and heat dissipation device with a high protection level, and the technical scheme adopted is as follows:

[0004] A ventilation and heat dissipation device with a high protection level includes a top cover, a base, a filtering device and a fan connected in sequence. The top cover is installed in the installation groove of the base. Exhaust and drainage holes communicating with the outside are arranged on the outer vertical plate around the top cover. A base annular baffle is arranged on the base. The number of the base annular baffles is multiple and they are concentrically arranged. Base drainage grooves are respectively arranged on each base annular baffle, and the base drainage grooves of adjacent base annular baffles do not overlap. A middle baffle of the top cover is arranged inside the top cover. The middle baffle of the top cover is concentric with the base annular baffle and is located between two adjacent base annular baffles, and the lower edge of the middle baffle of the top cover is lower than the upper edge of the base annular baffle. A sealing strip is arranged on one side of the base facing the fan. The filtering device is fixedly arranged between the base and the fan. A middle ventilation opening is arranged in the middle of the base. The air flow generated by the fan is discharged through the filtering device and the middle ventilation opening and then through the exhaust and drainage holes. The filtering device includes a one-way breathable net for preventing dust from passing through.

[0005] On the basis of the above scheme, the heights of the multiple base annular baffles increase in sequence from outside to inside.

[0006] Preferably, the heights of the lower edges of the base drainage grooves on the multiple base annular baffles decrease in sequence from inside to outside.

[0007] Preferably, a top cover drain groove is provided on the middle baffle of the top cover.

[0008] Preferably, a top cover outer baffle and a top cover inner baffle are provided on the top cover. The top cover outer baffle and the top cover inner baffle are concentrically arranged with the middle baffle of the top cover respectively. The top cover outer baffle is arranged outside the middle baffle of the top cover and inside the outermost base annular baffle. The top cover inner baffle is arranged inside the innermost base annular baffle. The lower edges of the top cover outer baffle and the top cover inner baffle are lower than the upper edge of any base annular baffle.

[0009] Preferably, a base inner baffle is provided on the base. The base inner baffle is annular and concentrically arranged with the base annular baffle. The base inner baffle is arranged inside the innermost base annular baffle.

[0010] Preferably, water permeable holes are provided on the base, and the water permeable holes penetrate through the base.

[0011] Preferably, a filter device installation groove is provided on the side of the base facing the fan. The filter device includes an installation net and a fixing ring. The installation net is arranged in the filter device installation groove, the fixing ring is arranged on one side of the installation net, and a one-way breathable net is arranged between the installation net and the fixing ring.

[0012] Preferably, the base is fixedly connected with a snap ring, and the top cover is fixedly connected with a snap buckle. The snap buckle is snap-connected with the snap ring.

[0013] Preferably, a sealant groove is provided on the base, and the sealant strip is arranged in the sealant groove.

[0014] The beneficial effects of the present utility model are as follows: A plurality of layers of annular baffles with staggered plug-in connections are arranged between the top cover and the base to form a labyrinth drainage channel, effectively isolating external water from entering the communication cabinet, automation control cabinet and other power distribution (box) cabinets, frequency converters and other heat-generating equipment, and at the same time enabling the water entering the top cover and the base to be discharged in time; The filter device is arranged between the base and the fan, with simple and reliable installation. The one-way filter screen in the filter device prevents dust from entering the power distribution cabinet, thus achieving the effect of high-grade waterproof and dustproof. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 : Structural schematic diagram of the present utility model;

[0016] Figure 2 : Structural schematic diagram of the bottom of the present utility model;

[0017] Figure 3 : Internal structure sectional view of the present utility model;

[0018] Figure 4 : Internal structure diagram of the top cover of the present utility model;

[0019] Figure 5:Structural diagram of the base of the present utility model;

[0020] Figure 6 :Schematic diagram of the bottom structure of the base of the present utility model;

[0021] Figure 7 :Schematic diagram of the installation state of the filtering device of the present utility model;

[0022] Figure 8 :Schematic diagram of the installation net of the present utility model;

[0023] Figure 9 :Schematic diagram of the fixing ring of the present utility model. Detailed implementation manners

[0024] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0025] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation" and other terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise stated, the meaning of "a plurality" is two or more.

[0027] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0028] As Figures 1 to 9 shown, a high protection level ventilation and heat dissipation device includes a top cover 1, a base 2, a filtering device 3 and a fan 4 which are connected in sequence. The filtering device 3 is fixedly arranged between the base 2 and the fan 4. A central ventilation opening is arranged in the middle of the base 2. The air flow generated by the fan 4 is discharged through the filtering device 3 and the central ventilation opening by an exhaust and drainage hole 12. The filtering device 3 includes a one-way breathable net for preventing dust from passing through.

[0029] The top cover 1 is installed in an installation groove 21 of the base 2. Preferably, the structure of the base 2 around the installation groove 21 encloses the top cover 1, increasing the reliability of the structure installation. The base 2 is fixedly connected with a snap ring 25, and the top cover 1 is fixedly connected with a buckle 17. The buckle 17 is a conical step type structure. The buckle 17 is clamped with the snap ring 25 to ensure the reliable installation of the top cover 1 and the base 2.

[0030] Exhaust and drainage holes 12 communicating with the outside are arranged on the outer vertical plate 11 around the top cover 1. A base annular baffle 22 is arranged on the base 2. The number of the base annular baffles 22 is multiple and they are concentrically arranged. Base drainage grooves 23 are respectively arranged on each base annular baffle 22. The base drainage grooves 23 of adjacent base annular baffles 22 do not overlap with each other, so as to form a labyrinth drainage channel through the multiple base annular baffles 22. Preferably, the heights of the multiple base annular baffles 22 gradually increase from outside to inside, so as to gradually improve the water blocking effect. The heights of the lower edges of the base drainage grooves 23 on the multiple base annular baffles 22 gradually decrease from inside to outside, facilitating the timely discharge of the water entering the base 2.

[0031] Inside the top cover 1, a middle baffle 14 of the top cover is provided. The middle baffle 14 of the top cover is concentric with the annular baffle 22 of the base and is located between two adjacent annular baffles 22 of the base. Moreover, the lower edge of the middle baffle 14 of the top cover is lower than the upper edge of the annular baffle 22 of the base, thus forming a staggered structure to effectively block the upper space of the labyrinth drainage channel. A drain groove 15 of the top cover is provided on the middle baffle 14 of the top cover to facilitate the step-by-step drainage of the water in the drainage channel. Preferably, an outer baffle 13 and an inner baffle 16 of the top cover are provided on the top cover 1. The outer baffle 13 and the inner baffle 16 of the top cover are respectively concentric with the middle baffle 14 of the top cover. The outer baffle 13 of the top cover is arranged outside the middle baffle 14 of the top cover and inside the outermost annular baffle 22 of the base. The inner baffle 16 of the top cover is arranged inside the innermost annular baffle 22 of the base. The lower edges of the outer baffle 13 and the inner baffle 16 of the top cover are lower than the upper edge of any annular baffle 22 of the base. An inner baffle 24 of the base is provided on the base 2. The inner baffle 24 of the base is annular and concentric with the annular baffle 22 of the base. The inner baffle 24 of the base is arranged inside the innermost annular baffle 22 of the base. The outer baffle 13 of the top cover prevents external water from entering the labyrinth drainage channel, and the inner baffle 16 of the top cover and the inner baffle 24 of the base prevent the water in the labyrinth drainage channel from entering the middle ventilation opening, thus forming a multi-level waterproof barrier.

[0032] The common heat dissipation device is vertically installed. After the external water enters from the exhaust and drain holes 12 above or on the side, it is discharged in time through the exhaust and drain holes 12 inside or outside and below the labyrinth drainage channel.

[0033] The base 2 is provided with water permeable holes 26. The water permeable holes 26 penetrate through the base 2. Preferably, the water permeable holes 26 are arranged at the edge of the installation groove 21. When the heat dissipation device is horizontally installed, the water flowing down along the edge of the top cover 1 is discharged in time through the water permeable holes 26.

[0034] A filter device installation groove 28 is provided on the side of the base 2 facing the fan 4. The filter device 3 includes an installation net 31 and a fixing ring 32. The installation net 31 is arranged in the filter device installation groove 28. The fixing ring 32 is arranged on one side of the installation net 31. A one-way breathable net is arranged between the installation net 31 and the fixing ring 32.

[0035] Fan connection holes 29 are provided outside the filter device installation groove 28. The fan 4 is fixedly connected to the base 2 by installing bolts and other connecting parts through the fan connection holes 29, thus completing the fixed installation of the filter device 3.

[0036] A sealing strip is provided on the side of the base 2 facing the fan 4 to meet the sealing requirements between the heat dissipation device and the power distribution cabinet. Preferably, a sealing groove 27 is provided on the base 2, and the sealing strip is arranged in the sealing groove 27.

[0037] The above has described the present utility model by way of example, but the present utility model is not limited to the above specific embodiments. Any modification or variation based on the present utility model falls within the scope of protection required by the present utility model.

Claims

1. A high protection level ventilation and heat dissipation device, characterized in that, It includes a top cover (1), a base (2), a filtering device (3) and a fan (4) connected in sequence. The top cover (1) is installed in the installation groove (21) of the base (2). Exhaust and drainage holes (12) communicating with the outside are provided on the outer vertical plate (11) around the top cover (1). A base annular baffle (22) is provided on the base (2). The number of the base annular baffles (22) is multiple and they are concentrically arranged. Base drainage grooves (23) are respectively provided on each base annular baffle (22), and the base drainage grooves (23) of adjacent base annular baffles (22) do not overlap. A top cover middle baffle (14) is provided inside the top cover (1). The top cover middle baffle (14) is concentrically arranged with the base annular baffle (22) and is located between two adjacent base annular baffles (22), and the lower edge of the top cover middle baffle (14) is lower than the upper edge of the base annular baffle (22). A sealing strip is provided on one side of the base (2) facing the fan (4). The filtering device (3) is fixedly arranged between the base (2) and the fan (4). A middle ventilation opening is provided in the middle of the base (2). The air flow generated by the fan (4) passes through the filtering device (3) and the middle ventilation opening and is discharged through the exhaust and drainage holes (12). The filtering device (3) includes a one-way breathable net for preventing dust from passing through.

2. The high protection level ventilation and heat dissipation device according to claim 1, characterized in that, The heights of the multiple base annular baffles (22) increase sequentially from outside to inside.

3. A high protection level ventilation and heat dissipation device according to claim 1, characterized in that, The heights of the lower edges of the base drainage grooves (23) on the multiple base annular baffles (22) decrease sequentially from inside to outside.

4. A high protection level ventilation and heat dissipation device according to claim 1, characterized in that, A top cover drainage groove (15) is provided on the top cover middle baffle (14).

5. A high protection level ventilation and heat dissipation device according to claim 1, characterized in that, A top cover outer baffle (13) and a top cover inner baffle (16) are provided on the top cover (1). The top cover outer baffle (13) and the top cover inner baffle (16) are respectively concentrically arranged with the top cover middle baffle (14). The top cover outer baffle (13) is arranged outside the top cover middle baffle (14) and inside the outermost base annular baffle (22). The top cover inner baffle (16) is arranged inside the innermost base annular baffle (22). The lower edges of the top cover outer baffle (13) and the top cover inner baffle (16) are lower than the upper edge of any base annular baffle (22).

6. A high protection level ventilation and heat dissipation device according to claim 1, characterized in that, A base inner baffle (24) is provided on the base (2). The base inner baffle (24) is annular and concentrically arranged with the base annular baffle (22). The base inner baffle (24) is arranged inside the innermost base annular baffle (22).

7. A high protection level ventilation and heat dissipation device according to claim 1, characterized in that, A water permeable hole (26) is provided on the base (2). The water permeable hole (26) penetrates through the base (2).

8. A high protection level ventilation and heat dissipation device according to claim 1, characterized in that, A filtering device installation groove (28) is provided on one side of the base (2) facing the fan (4). The filtering device (3) includes an installation net (31) and a fixing ring (32). The installation net (31) is arranged in the filtering device installation groove (28). The fixing ring (32) is arranged on one side of the installation net (31). A one-way breathable net is arranged between the installation net (31) and the fixing ring (32).

9. A high protection level ventilation and heat dissipation device according to claim 1, characterized in that, The base (2) is fixedly connected with a snap ring (25), and the top cover (1) is fixedly connected with a snap buckle (17). The snap buckle (17) is clamped with the snap ring (25).

10. A high protection level ventilation and heat dissipation device according to claim 1, characterized in that, The base (2) is provided with a sealant groove (27), and the sealant strip is arranged in the sealant groove (27).

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