CN215121426U - Shutter unit and waterproof structure - Google Patents

Abstract

The utility model relates to an equipment shell ventilation waterproof technical field discloses a shutter unit and waterproof construction. The blind unit includes: the louver body is provided with a plurality of ventilation slots which are arranged at intervals; the blades are arranged on the louver body at intervals and extend obliquely from the same side of the louver body to be far away from the louver body. The blind unit can be combined with another blind unit so that the louver bodies of the blind units are connected in an abutting mode, the ventilation grooves of the blind units are communicated with each other, and the extending directions of the blades of the blind units are consistent. The utility model provides a shutter unit can with the cooperation of the shell shutter of electrical apparatus machine case, perhaps the combination of two or more shutter units of accessible to play better water-proof effects.

Description

Shutter unit and waterproof structure

Technical Field

The utility model discloses embodiment relates to equipment shell ventilation waterproof technical field, especially relates to a shutter unit and waterproof construction who has this kind of shutter unit.

Background

The chassis products generally meet a certain International Protection level according to the use environment, for example, meet the Protection requirements of IP (International Protection) 23S and IP 23. Wherein, the IP23 protection requirement means: protection against foreign objects of 12.5 mm diameter and larger; the protection is in water spraying within 60 degrees from the vertical plane, and the electric appliance cannot be damaged; moreover, the movable/rotatable parts in the appliance must not be stationary during testing; for example, when a fan is present within an appliance, the fan should be in operation during an IP test. IP23S protection requirements refer to: protection against foreign objects of 12.5 mm diameter and larger; the protection is in water spraying within 60 degrees from the vertical plane, and the electric appliance cannot be damaged; also, the movable/rotatable components within the appliance should be stationary at the time of testing; for example, when a fan is present within an appliance, the fan must not operate during an IP test.

In practical design, IP protection and machine heat dissipation can be mutually restricted. For example, in order to meet the protection requirements of chassis-like products on IP23S and IP23, a labyrinth design is usually performed at the air inlet position to prevent water from entering the interior of the machine, thereby changing the air inlet area of the air inlet or generating a very large wind resistance to affect the heat dissipation of the machine.

In the face of different machine type sizes and spatial layouts and different protection requirements, differential design is usually performed, so that a large number of nonstandard designs are formed, and thus, a plurality of dies or matching parts with different specifications are derived, and the design cost and the material cost are increased.

Accordingly, there is a need for improvements that overcome the above-mentioned deficiencies.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that embodiment mainly solved provides one kind and can be through using effectively waterproof shutter unit with other shutter combinations.

In order to solve the above technical problem, the utility model discloses a technical scheme that embodiment adopted is: there is provided a blind unit, the blind unit being a first blind unit and comprising: the louver body is provided with a plurality of ventilation slots which are arranged at intervals; the blades are arranged on the louver body at intervals and extend away from the louver body from the same side of the louver body in an inclined mode; each vane corresponds to a respective vent slot and each vane is attached to one side of a respective vent slot. The first louver unit is used for being combined with the second louver unit, so that a louver body of the first louver unit is connected with a louver body of the second louver unit in an abutting mode, each ventilation groove of the first louver unit is communicated with the corresponding ventilation groove of the second louver unit, and each blade of the first louver unit and the corresponding blade of the second louver unit extend in the same direction.

In some embodiments, each of the blades comprises a flat plate shape, a bent shape, or a curved shape.

In some embodiments, each of the vanes is angled in a range of 30 degrees to 45 degrees with respect to the corresponding ventilation slot.

In some embodiments, the first louver unit is adapted to be mounted within an appliance cabinet and is disposed adjacent to housing louvers on the appliance cabinet; each of the vanes is disposed in parallel with a vane of the housing louver.

In some embodiments, the air intake area at the height of each of the ventilation slots is set to be greater than or equal to the air intake area of each of the ventilation slots of the housing louvers.

On the other hand, the embodiment of the utility model provides a still provide a waterproof construction, waterproof construction includes: an electrical enclosure including a housing louver; a blind unit according to any one of the preceding claims. The first louver unit is mounted within the appliance cabinet and is disposed adjacent to a housing louver on the appliance cabinet.

In some embodiments, a fan assembly is also mounted within the appliance cabinet, the first louver unit being located between the housing louvers and the fan assembly.

In some embodiments, the waterproof structure further includes a second louver unit, the first louver unit having the same structure as the second louver unit; the first louver unit and the second louver unit are combined, so that a louver body of the first louver unit is in abutting connection with a louver body of the second louver unit, each ventilation groove of the first louver unit is communicated with the corresponding ventilation groove of the second louver unit, and each blade of the first louver unit and the corresponding blade of the second louver unit extend in the same direction.

In some embodiments, the waterproof structure further includes third and fourth blind units having the same structure as the first blind unit; wherein the third louver unit is combined with the second louver unit such that each louver of the third louver unit abuts against a corresponding louver of the second louver unit and each louver of the third louver unit coincides with a corresponding louver of the second louver unit in an extending direction; and the fourth louver unit is combined with the third louver unit, so that the louver body of the fourth louver unit is in abutting connection with the louver body of the third louver unit, each ventilation slot of the fourth louver unit is communicated with the corresponding ventilation slot of the third louver unit, and each vane of the fourth louver unit is consistent with the extending direction of the corresponding vane of the third louver unit.

In some embodiments, the housing louvers are configured to prevent a spherical object having a diameter of 12.5 millimeters from entering completely within the appliance chassis; in addition, the housing louver and the first louver unit form an air inlet channel

Compared with the prior art, the utility model discloses the shutter unit can with the cooperation of the shell shutter of electrical apparatus machine case, perhaps the combination of two or more shutter units of accessible to play better water-proof effects.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.

Fig. 1 is a schematic perspective view of a waterproof structure according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the waterproof structure of FIG. 1;

fig. 3 is a schematic plan view of a louver unit according to an embodiment of the present invention, in which a louver of a housing of the fan assembly and the electrical equipment case is also shown;

fig. 4 is a schematic plan view of a louver assembly according to an embodiment of the present invention, wherein the louver assembly of the fan assembly and the housing of the electrical enclosure are also shown;

fig. 5 is a schematic plan view of a louver assembly according to another embodiment of the present invention, wherein the housing louvers of the fan assembly and the electrical enclosure are also shown;

fig. 6 is a schematic perspective view of a waterproof structure according to another embodiment of the present invention.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described in more detail with reference to the accompanying drawings and specific embodiments. It is noted that when an element is referred to as being "secured to"/"mounted to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may be present. The terms "upper", "lower", "inner", "outer", "vertical", "horizontal", and the like as used herein are used in the description to indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Referring to fig. 1 and 2, an embodiment of the present invention provides a waterproof structure 100, which mainly includes an electrical appliance cabinet 50 and a blind unit 10 installed in the electrical appliance cabinet 50.

The electrical equipment case 50 may be a housing structure of various electrical equipment such as a welding power supply and a communication power supply, in which various electrical modules or electrical units may be installed, and the electrical equipment case 50 is used to provide support, protection, and the like for the electrical modules therein. The electrical enclosure 50 includes an enclosure louver 51, the enclosure louver 51 may include a plurality of ventilation slots 52 and a plurality of vanes 53, the vanes 53 may be spaced from top to bottom, and each two adjacent vanes 53 define a ventilation slot 52 therebetween. These ventilation slots 52 may serve as air inlets for the ventilation slots 52. In addition, the electrical enclosure 50 may further include another housing louver 54, which may be disposed at the other side of the electrical enclosure 50, may have a similar structure to the housing louver 51, and may serve as an air outlet of the ventilation slot 52. It is noted that although the frame structure 55 of the appliance housing 50 is primarily shown in fig. 1, the appliance housing 50 may also include top panels, side panels, etc. mounted to the frame structure 55 to collectively serve a protective purpose.

The shutter unit 10 is used for being installed in the electrical appliance cabinet 50 and is arranged adjacent to the housing shutter 51 on the electrical appliance cabinet 50; for example, the blind unit 10 may be generally disposed relative to the housing blind 51, with the slats 53 of the housing blind 51 being parallel to the slats of the blind unit 10; in addition, the louver unit 10 may be disposed opposite to the housing louver 51, and the two may be offset in the vertical position. The blind unit 10 can be manufactured separately from the appliance housing 50 and is mounted in use within the appliance housing 50 so as to cooperate with the housing blind 51 to provide a water-proof function.

In the waterproof structure 100 of this embodiment, after external water passes through the housing louver 51, the water may be bounced to the louver unit 10 disposed opposite to the housing louver 51, and the louver unit 10 may block most of the water from passing through. Therefore, by the cooperation of the louver unit 10 and the housing louver 51, the waterproof structure 100 provided by the embodiment can achieve better ventilation and waterproof effects.

In some embodiments, a fan assembly 60 is also mounted within the appliance cabinet 50, and the louver unit 10 is located between the housing louvers 51 and the fan assembly 60. The fan assembly 60 is used to suck external air into the electrical equipment case 50 through the housing louver 51 and discharge the external air through the other housing louver 54 during power-on operation, so as to dissipate heat of electrical modules or electrical units and the like in the electrical equipment case 50 through airflow circulation.

In some embodiments, the housing louvers 51 are configured to prevent spherical objects having a diameter of 12.5 millimeters from completely entering the appliance casing 50. By the arrangement, the protection requirement of the electrical appliance cabinet 50 meeting IP2X can be met, wherein X can be any waterproof grade from 0 to 8. In addition, since these ventilation grooves 52 of the housing louver 51 can serve as air inlets of the ventilation grooves 52, the housing louver 51 and the louver unit 10 together form an air intake passage; that is, the external air may pass through the housing louver 51 and the louver unit 10, then pass through the fan assembly 60, and finally be discharged through the other housing louver 54.

The blind unit 10 according to the embodiment of the present invention will be described in detail below.

Referring to fig. 3, a blind unit 10 according to an embodiment of the present invention may mainly include a blind window 11 and a plurality of blades 13. The louver body 11 is provided with a plurality of ventilation slots 12 which are arranged at intervals; for example, the plurality of ventilation slots 12 may be spaced from top to bottom. The louver body 11 has a structure which can be wholly positioned in a plane; for example, the louver 11 may be formed by forming a plurality of ventilation slots 12 in a flat plate. The blades 13 are arranged on the louver 11 at intervals and extend away from the louver 11 from the same side of the louver 11 in an inclined manner; for example, the plurality of vanes 13 each extend downward from the left side of the louver 11 gradually away from the louver 11. Each vane 13 corresponds to one corresponding ventilation slot 12, and each vane 13 is connected to one side edge of the corresponding ventilation slot 12; that is, each vane 13 is connected to the louver 11 on the upper side of the corresponding ventilation groove 12. It will be readily appreciated that each vane 13 and corresponding ventilation slot 12 may be repeatedly arranged as a minimum unit on the louver 11 to form the louver unit 10.

In some embodiments, the blind unit 10 may be formed by punching a flat plate body, wherein the ventilation slots 12 and the blades 13 may be formed at one time by the punching operation. Alternatively, the blind unit 10 may be formed by additionally providing a plurality of louvers 13 on a louver 11 having a plurality of ventilation slots 12. The louver 11 may be a flat window, and may also be an arc-shaped window, a herringbone window, or the like.

As shown in fig. 1 and 2, the louver unit 10 may be installed in an electrical cabinet 50 and disposed adjacent to a housing louver 51 on the electrical cabinet 50, so that the water-proof structure 100 may be better waterproofed by the cooperation of the louver unit 10 and the housing louver 51. Wherein the distance between the louver unit 10 and the housing louvers 51 may be set as close as possible, but should not be too close to increase the wind resistance. In addition, the air intake area of the housing louver 51 may be smaller than or equal to the air intake area of the louver unit 10 so that too large wind resistance is not increased by providing the louver unit 10.

More specifically, as shown in fig. 3, the louver unit 10 may be disposed adjacent to the housing louver 51 as the air inlet, and the louver unit 10 is located between the housing louver 51 and the fan assembly 60. Thus, when water is sprayed at an angle a1 of, for example, 60 degrees from vertical, if the water, after passing through the housing louvers 51, bounces back onto the louver units 10 as shown in fig. 3, the louver units 10 can block most of the water from passing through. In addition, when the fan assembly 60 is not operated, the fan assembly 60 may also block water passing through the blind unit 10 from entering the inside of the appliance cabinet 50, thereby achieving the protection requirements of, for example, IP 23S.

Alternatively, as shown in fig. 4, the blind unit 10 may constitute a blind assembly with another blind unit 20, and then be applied to the waterproof structure 100 shown in fig. 1 and 2. Specifically, the blind unit 10 may be combined with another blind unit 20, wherein the another blind unit 20 may have the same structure as the blind unit 10, that is, the another blind unit 20 also includes a louver 11, a plurality of ventilation grooves 12 spaced on the louver 11, and a plurality of vanes 13 spaced on the louver 11. Thus, by inverting the other blind unit 20 with respect to the blind unit 10, the louver body 11 of the blind unit 10 and the louver body 11 of the other blind unit 20 are brought into abutting connection, each ventilation slot 12 of the blind unit 10 communicates with the corresponding ventilation slot 12 of the other blind unit 20, and each louver 13 of the blind unit 10 extends in the same direction as the corresponding louver 13 of the other blind unit 20. So configured, when spraying water at an angle a1 of, for example, 60 degrees from vertical, if the water passes through the housing louvers 51, the water will bounce back on the louver units 10 disposed opposite the housing louvers 51 as shown in fig. 4, and the louver units 10 can block most of the water from passing through; a large portion of the water passing through the shutter unit 10 is also blocked by the other shutter unit 20. In addition, when the fan assembly 60 is in operation, water rebounding on the blind unit 10 needs to climb over the other blind unit 20 before entering the interior of the appliance cabinet 50 under the force of the fan assembly 60 drawing air radially in the radial direction a2 and in the right direction A3, while the force of the drawing air is not sufficient to allow the water to climb over the blind assembly comprising the blind unit 10 and the other blind unit 20, which blind assembly blocks most or all of the water from entering the interior of the cabinet, thereby ensuring that it can pass the IP23 test, for example. Thus, by the cooperation of the blind assembly including the blind unit 10 and the other blind unit 20 with the housing blind 51, a better waterproof effect can be achieved.

It is noted that when two blind units 10 are employed in combination, the blind unit 10 may be referred to as a first blind unit, and the other blind unit 20 may be referred to as a second blind unit. The louver 11 of the louver unit 10 and the louver 11 of the other louver unit 20 may be connected by riveting, welding, or the like, partially or entirely, or may be fixed in the electrical housing 50 so as to be merely in contact with each other.

In some embodiments, as shown in FIG. 3, each of the vanes 13 may comprise a flat plate shape. That is, each of the vanes 13 may extend in a plane from the louver 11. So configured, both the manufacture of the shutter unit 10 and the formation of a generally linearly extending airflow path (see arrow A4 in FIG. 4) when two shutter units 10 are used in combination are facilitated. In other embodiments, each of the blades 13 may include a bent shape, a curved shape, or the like.

In some embodiments, as shown in fig. 3, each of the vanes 13 is at an angle a5 in the range of 30 degrees to 45 degrees with respect to the corresponding ventilation slot 12. For example, the angle a5 may be 30 degrees, 32 degrees, 35 degrees, 40 degrees, 45 degrees, etc. The arrangement is such that each of said vanes 13 extends obliquely downwards from the louvre 11 so that water falling thereon drips under gravity and is difficult to pass through said ventilation slots 12. In addition, each blade 13 does not shield the corresponding ventilation slot 12, so that the wind resistance is not increased.

In some embodiments, as shown in fig. 3, the extension length L of each of the vanes 13 from the louver 11 may be less than or equal to the height H of the corresponding ventilation slot 12. So arranged, each said vane 13 does not form too much shelter to the corresponding ventilation slot 12, thus not increasing the wind resistance. In other embodiments, the extension length L of each vane 13 from the louver 11 may be greater than the height H of the corresponding ventilation slot 12.

In some embodiments, as shown in fig. 3, the air intake area at the height H of each of the ventilation slots 12 is set to be greater than or equal to the air intake area of each of the ventilation slots 52 of the housing louvers 51. With the arrangement, the influence of the height H of each ventilation slot 12 on the air inlet area is considered; thus, the air intake area of the outer louver is made the same as the air intake area at the height H of the ventilation slots 12, or the air intake area of the outer louver is smaller than the air intake area at the height H of the ventilation slots 12, so that the increase of the wind resistance of each ventilation slot 12 can be prevented.

In some embodiments, as shown in fig. 3, each two adjacent ventilation slots 12 are spaced apart by a distance D in the height direction that is less than the length L of the extension of the vane 13 from the louver 11. With the arrangement, more ventilation slots 12 can be formed in the louver body 11, so that the louver body 11 can be effectively utilized.

As shown in fig. 5, another louver assembly may be further provided based on the louver assembly shown in fig. 4 so as to be used in combination in the waterproof structure 100 shown in fig. 1 and 2. The waterproof structure 100 includes, in addition to one blind assembly constituted by the first blind unit 10 and the second blind unit 20, another blind assembly constituted by the third blind unit 30 and the fourth blind unit 40.

Wherein the third and fourth louver units 30 and 40 have the same structure as the first louver unit 10. That is, the third and fourth blind units 30 and 40 also include a louver 11, a plurality of ventilation slots 12 spaced apart on the louver 11, and a plurality of vanes 13 spaced apart on the louver 11. Thus, the third louver unit 30 and the second louver unit 20 may be coupled such that each of the slats 13 of the third louver unit 30 abuts against the corresponding slat 13 of the second louver unit 20, and each of the slats 13 of the third louver unit 30 coincides with the extending direction of the corresponding slat 13 of the second louver unit 20. The fourth louver unit 40 may be combined with the third louver unit 30 such that the louver body 11 of the fourth louver unit 40 abuts against the louver body 11 of the third louver unit 30, each ventilation groove 12 of the fourth louver unit 40 communicates with the corresponding ventilation groove 12 of the third louver unit 30, and each vane 13 of the fourth louver unit 40 extends in the same direction as the corresponding vane 13 of the third louver unit 30. So configured, when spraying water at an angle a1 of, for example, 60 degrees from vertical, if the water passes through the housing louvers 51, the water will bounce back on the louver units 10 disposed opposite the housing louvers 51 as shown in fig. 5, and the louver units 10 can block most of the water from passing through; most of the water passing through the blind unit 10 is also blocked by the second, third and fourth blind units 20, 30 and 40. Thus, by the cooperation of the louver assemblies including the first, second, third and fourth louver units 10, 20, 30 and 40 with the housing louver 51, a superior waterproof effect can be achieved. In addition, when the fan assembly 60 is operated, water rebounding on the blind unit 10 needs to climb over the second, third and fourth blind units 20, 30 and 40 before entering the inside of the appliance cabinet 50 under the force of the fan assembly 60 drawing air radially in the radial direction a2 and the right direction A3, while the force of the drawing air is not sufficient to allow the water to climb over the blind assembly including the first, second, third and fourth blind units 10, 20, 30 and 40, which can block most or all of the water from entering the inside of the cabinet, thereby ensuring passing the IP23 test, for example. Thus, by the cooperation of the louver assemblies including the first, second, third and fourth louver units 10, 20, 30 and 40 with the housing louver 51, a superior waterproof effect can be achieved.

It is shown that the shutter assembly shown in fig. 4 can be adapted to a cabinet structure having a common space, while the shutter assembly shown in fig. 5 can be adapted to a more compact cabinet structure or a higher level of protection, but where the wind resistance will be somewhat greater. In addition, in the embodiment shown in fig. 4 and 5, by combining the louver units, the air inlet area of the air inlet is not changed, and the direction of the louver unit combination is in parallel relation with the housing louver 51 of the electrical enclosure 50, so that the wind resistance is not increased, and the wind resistance is only slightly increased as the louver units are increased. In the embodiment of the present application, actual thermal tests show that the actual temperature of part of the devices in the embodiment of fig. 5 rises by about 2 degrees compared to the actual temperature of part of the devices in the embodiment of fig. 4, which is not enough to have a great influence on heat, so that IP23 protection and machine heat dissipation are optimally balanced.

Referring to fig. 6, another embodiment of the present invention provides a waterproof structure 100, which mainly includes an electrical apparatus case 50 and a blind assembly installed in the electrical apparatus case 50. The electrical cabinet 50 shown in fig. 6 may be the same as or similar to the electrical cabinet 50 shown in fig. 2, and the louver assembly shown in fig. 6 may be the louver assembly composed of the louver unit 10 and the other louver unit 20 shown in fig. 4, which will not be described herein again.

As can be understood from the above description, the louver unit 100 provided in the present application can adopt a flexible design concept without changing the air inlet area of the air inlet, and achieve the protection requirements of, for example, IP23S and IP23 by combining one or more louver units 10, so that the chassis-like products are rapidly developed, and the design cost and the material cost are greatly reduced; that is, when the same series of products are developed, the product development can be rapidly carried out in the face of different machine type sizes and spatial layouts and different protection requirements due to the adoption of the technology, so that the design cost is greatly reduced and the design quality is ensured; in particular, after the blind unit 100 is standardized, the blind unit 100 can be repeatedly used in cabinets with different machine model sizes and spatial layouts, and a large number of non-standard designs are avoided, so that the machine material cost is reduced, and the blind unit 100 provided by the application can solve the design problems of cabinet type products such as IP23S and IP 23.

The aforesaid only does the embodiment of the utility model discloses a not consequently restriction the utility model discloses a patent range, all utilize the utility model discloses the equivalent structure or the equivalent flow transform that the specification and the drawing were held, or direct or indirect application is in other relevant technical field, all including on the same reason the utility model discloses a patent protection scope.

Claims (10)

1. A blind unit, characterized in that it is a first blind unit (10) and comprises:

the louver body (11) is provided with a plurality of ventilation grooves (12) which are arranged at intervals; and

a plurality of blades (13), wherein the blades (13) are arranged on the louver (11) at intervals and extend away from the louver (11) from the same side of the louver (11) in an inclined manner; each vane (13) corresponds to one corresponding ventilation groove (12), and each vane (13) is connected to one side edge of the corresponding ventilation groove (12);

wherein the first shutter unit (10) is used for combining with a second shutter unit (20) so that a shutter body (11) of the first shutter unit (10) is in abutting connection with a shutter body (11) of the second shutter unit (20), each ventilation slot (12) of the first shutter unit (10) is communicated with a corresponding ventilation slot (12) of the second shutter unit (20), and each vane (13) of the first shutter unit (10) is extended in the same direction with a corresponding vane (13) of the second shutter unit (20).

2. The blind unit as claimed in claim 1,

each of the blades (13) includes a flat plate shape, a bent shape, or a curved shape.

3. The blind unit as claimed in claim 1,

each of the vanes (13) is angled in the range of 30 to 45 degrees from the respective ventilation slot (12).

4. The blind unit as claimed in claim 1,

the first louver unit (10) is used for being installed in an electrical appliance cabinet (50) and is arranged adjacent to a shell louver (51) on the electrical appliance cabinet (50); each of the blades (13) is disposed in parallel with the blade (53) of the housing louver (51).

5. The blind unit as claimed in claim 4,

the air intake area at the height (H) of each ventilation groove (12) is set to be greater than or equal to the air intake area of each ventilation groove (52) of the housing louver (51).

6. A waterproof structure characterized by comprising:

an appliance cabinet (50), the appliance cabinet (50) comprising a housing louver (51); and

the blind unit according to any one of claims 1-5;

wherein the first louver unit (10) is mounted within the appliance cabinet (50) and is disposed adjacent to a housing louver (51) on the appliance cabinet (50).

7. The waterproof structure according to claim 6,

a fan assembly (60) is further mounted in the electrical appliance cabinet (50), and the first louver unit (10) is located between the housing louver (51) and the fan assembly (60).

8. The waterproof structure according to claim 6,

the waterproof structure (100) further includes a second louver unit (20), the first louver unit (10) and the second louver unit (20) having the same structure; wherein the first shutter unit (10) is combined with the second shutter unit (20) so that the shutter body (11) of the first shutter unit (10) is in abutting connection with the shutter body (11) of the second shutter unit (20), each ventilation slot (12) of the first shutter unit (10) is communicated with the corresponding ventilation slot (12) of the second shutter unit (20), and each vane (13) of the first shutter unit (10) is extended in the same direction as the corresponding vane (13) of the second shutter unit (20).

9. The waterproof structure according to claim 8,

the waterproof structure (100) further includes a third louver unit (30) and a fourth louver unit (40), the third louver unit (30) and the fourth louver unit (40) having the same structure as the first louver unit (10);

wherein the third blind unit (30) is combined with the second blind unit (20) such that each vane (13) of the third blind unit (30) abuts against a corresponding vane (13) of the second blind unit (20), and each vane (13) of the third blind unit (30) coincides with an extending direction of the corresponding vane (13) of the second blind unit (20); and is

The fourth louver unit (40) is combined with the third louver unit (30) so that the louver body (11) of the fourth louver unit (40) is in abutting connection with the louver body (11) of the third louver unit (30), each ventilation groove (12) of the fourth louver unit (40) is communicated with the corresponding ventilation groove (12) of the third louver unit (30), and each vane (13) of the fourth louver unit (40) is extended in the same direction as the corresponding vane (13) of the third louver unit (30).

10. The waterproof structure according to any one of claims 6 to 9,

the housing louvers (51) are arranged to prevent spherical objects of 12.5 mm diameter from entering completely into the appliance cabinet (50); and/or

The housing louver (51) and the first louver unit (10) form an air intake passage.

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