Cabinet door air inlet compatible with various IP protection requirements

Abstract

The utility model relates to the technical field of frequency converter cabinet bodies, in particular to a cabinet door air inlet compatible with various IP protection requirements, which comprises a front panel and a rear panel. The front panel faces the outer side of the cabinet door, and the rear panel faces the inner side of the cabinet door; the rear panel is mounted in the air inlet, and a rear panel opening in the rear panel is determined according to a preset dustproof requirement; the front panel is mounted in front of the rear panel and protrudes out of the cabinet door; and the front panel opening on the front panel is determined according to a preset waterproof requirement. In order to solve the problems that in the prior art, an air inlet needs to be repeatedly designed under different protection levels, and cost is high, in the embodiment, the corresponding protection requirement is met in the mode that a front panel and a rear panel are stacked on the air inlet, the front panel is designed to be provided with holes according to the waterproof requirement, and the rear panel is designed to be provided with holes according to the waterproof requirement. Hole design is carried out on the rear panel according to the dustproof requirement, different protection requirements can be effectively met by adjusting different combinations of the front panel and the rear panel, and repeated design is not needed.

Description

Technical Field

[0001] This utility model relates to the field of inverter cabinet technology, specifically to an air inlet for a cabinet door that is compatible with multiple IP protection requirements. Background Technology

[0002] During the sales process, many frequency inverters are customized to a certain extent according to customer requirements. In this customization process, different operating conditions at the customer's site often necessitate different IP protection requirements for the inverter, such as IP20, IP31, and IP42. The IP (Ingress Protection) rating system was drafted by the IEC (International Electrotechnical Commission) and classifies electrical appliances according to their dust and moisture protection characteristics. The IP protection rating consists of two digits. The first digit indicates the level of protection against dust and foreign object intrusion (this includes tools, human fingers, etc., which must not touch the live parts inside the appliance to avoid electric shock). The second digit indicates the degree of protection against moisture and water immersion. A higher number indicates a higher protection level.

[0003] In the existing technology, in order for the frequency converter to meet the corresponding protection requirements, the cabinet is usually designed in a related way, such as the cabinet structure is sealed. For equipment with air cooling requirements, an air inlet with a specific protection level also needs to be designed to meet the intake and exhaust requirements.

[0004] For example, Chinese patent CN201520699724.X discloses a protective structure for a frequency converter cabinet, including a waterproof cover, a protective mesh, a water guide channel, and a gap waterproof cover. The waterproof cover is installed above the top fan frame of the frequency converter, covering the fan frame below. The protective mesh is installed between the top fan frame and the waterproof cover, forming a downward-opening cuboid structure with the opening corresponding to the fan outlet. The water guide channel is installed between two adjacent fan frames, and its width is greater than the gap width between the two adjacent waterproof covers above it. The gap waterproof cover is installed on the left side of the leftmost fan frame and the upper right side of the rightmost fan frame. Through the water guide channel, waterproof cover, protective mesh, and gap waterproof cover, the gaps and air vents at the top of the frequency converter cabinet are comprehensively covered, preventing solids and liquids from entering the cabinet and damaging the frequency converter, effectively improving the protection level of the frequency converter cabinet.

[0005] However, in actual implementation, the inventors found that, as an engineering-oriented air-cooled heat dissipation product, customers' IP protection requirements often involve random combinations between IP0X~IP4X (dustproof) and IPX0~IPX2 (waterproof) (a total of 15 possible combinations). Therefore, if a traditional design scheme that satisfies both dustproof and waterproof requirements is adopted, then 15 different styles of air inlets need to be designed based on the combination results. Even after simplification, there will still be no fewer than 6 to 8 different styles of air inlets. At the same time, too many types of air inlets not only increase the design workload, but also hinder the large-scale production of the product, material management, and the reduction of production and management costs. Utility Model Content

[0006] To address the aforementioned problems in existing technologies, a cabinet door air inlet compatible with multiple IP protection requirements is provided.

[0007] The specific technical solution is as follows:

[0008] An air inlet compatible with multiple IP protection requirements is provided on the cabinet door, and a front panel and a rear panel are installed on the air inlet;

[0009] The front panel faces the outside of the cabinet door, and the rear panel faces the inside of the cabinet door;

[0010] The rear panel is installed in the air inlet, and the opening on the rear panel is determined according to the preset dustproof requirements;

[0011] The front panel is mounted in front of the rear panel and protrudes from the cabinet door.

[0012] The openings on the front panel are determined according to the preset waterproofing requirements.

[0013] On the other hand, the air inlet is rectangular, and the long axis of the air inlet is arranged along the long axis of the cabinet door.

[0014] On the other hand, the air inlet has a mounting protrusion on the inner side near the cabinet door;

[0015] The mounting boss is arranged around the air inlet.

[0016] The mounting boss extends a predetermined depth along the inner surface of the cabinet door toward the air inlet.

[0017] The mounting boss is attached to the front panel on the side facing the cabinet door.

[0018] On the other hand, the air inlet is provided with hook grooves around the outer side near the cabinet door;

[0019] The front panel has hooks on the side facing the cabinet door, corresponding to the position of the hook groove;

[0020] The hook matches the hook groove.

[0021] On the other hand, the hook grooves are distributed on the left and right sides of the air inlet.

[0022] On the other hand, when the preset waterproof requirement is IPX2, a covering structure is also provided on the front panel;

[0023] The covering structure has multiple isosceles trapezoidal structures when viewed from the side.

[0024] The long side of the covering structure is fitted to the front panel, and the sloping side extends forward and downward from the front panel;

[0025] The covering structure is a hollow structure, with the lower surface and the side near the front panel left empty.

[0026] On the other hand, the rear panel has multiple first openings distributed in a grid pattern;

[0027] Each of the first openings is fitted with a wire mesh having the openings of the rear panel.

[0028] On the other hand, two air inlets are provided along the upper edge of the cabinet door in the vertical direction.

[0029] The above technical solution has the following advantages or beneficial effects:

[0030] To address the issue that existing air inlet designs require repeated design for different protection levels, resulting in high costs, this embodiment addresses this by superimposing a front panel and a rear panel on the air inlet to meet corresponding protection requirements. The front panel features perforations for waterproofing, while the rear panel features perforations for dustproofing. By adjusting different combinations of the front and rear panels, different protection requirements can be effectively met without requiring repeated design. Attached Figure Description

[0031] Embodiments of the present invention will be described more fully with reference to the accompanying drawings. However, the accompanying drawings are for illustration and explanation only and do not constitute a limitation on the scope of the present invention.

[0032] Figure 1 This is an overall schematic diagram of an embodiment of the present utility model;

[0033] Figure 2 This is a schematic diagram of the mounting boss in an embodiment of the present utility model;

[0034] Figure 3 This is a schematic diagram of the front panel of an embodiment of the present utility model;

[0035] Figure 4 This is a schematic diagram of the front panel of another embodiment of the present invention;

[0036] Figure 5 This is a schematic diagram of the rear panel of an embodiment of the present utility model;

[0037] Figure 6 This is a schematic diagram of the rear panel of another embodiment of the present invention;

[0038] Figure 7 This is a schematic diagram of the rear panel of another embodiment of the present invention. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0041] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0042] This utility model includes:

[0043] An air inlet for cabinet doors that is compatible with multiple IP protection requirements, such as... Figure 1 As shown, a front panel 3 and a rear panel 4 are installed on the air inlet 2, which are mounted on the cabinet door 1.

[0044] The front panel 3 faces the outside of the cabinet door 1, and the rear panel 4 faces the inside of the cabinet door;

[0045] The rear panel 4 is installed in the air inlet 2, and the rear panel opening on the rear panel 4 is determined according to the preset dustproof requirements;

[0046] The front panel 3 is installed in front of the rear panel and protrudes from the cabinet door 1;

[0047] The front panel openings on front panel 3 are determined according to the preset waterproofing requirements.

[0048] Specifically, in view of the problem that the air inlet design in the prior art needs to be redesigned repeatedly for different protection levels, resulting in high costs, this embodiment meets the corresponding protection requirements by superimposing a front panel 3 and a rear panel 4 on the air inlet 2. The front panel 3 is designed with holes for waterproofing, and the rear panel 4 is designed with holes for dustproofing. By adjusting different combinations of the front panel 3 and the rear panel 4, different protection requirements can be effectively met without redesigning.

[0049] Specifically, the aforementioned air inlet structure is typically located on the door 1 of a closed cabinet. This closed cabinet can be used to install air-cooled frequency converters with air intake and exhaust requirements, or other industrial equipment requiring protection. Considering that electrical equipment is usually placed side by side in the power distribution room, the air inlet is located on the side of the door 1 closest to the aisle. However, in some embodiments, setting it on the side wall of the electrical cabinet can also achieve the same air intake effect.

[0050] The air inlet 2 is a through hole opened on the cabinet door 1, and mounting structures corresponding to the rear panel 4 and the front panel 3 are respectively provided on it. During installation, the rear panel 4 is first installed on the inside, and then the front panel 3 is installed on the front.

[0051] The front panel 3 is designed primarily for waterproof protection requirements (IPX0~IPX2), and is used to meet the requirements of no protection, protection against vertical dripping, and protection against vertical dripping when the shell is tilted at 15°. It has corresponding holes that allow air to pass through while meeting the dripping protection requirements.

[0052] The rear panel 4 is designed for different levels of dust protection requirements (IP0X-IP4X) and is used to intercept solid foreign objects of corresponding sizes through holes of specific dimensions.

[0053] The combination of front panel 3 and rear panel 4 simultaneously achieves waterproof and dustproof design requirements of different specifications.

[0054] In one embodiment, the air inlet 2 is rectangular, and the long axis of the air inlet 2 is arranged along the long axis of the cabinet door 1.

[0055] There are two air inlets 2 along the top and bottom of the cabinet door 1.

[0056] Specifically, in order to achieve better air permeability, in this embodiment, two air inlets 2 are arranged sequentially along the vertical direction on the cabinet door 1. The air inlets 2 are rectangular, with their long axis coinciding with the cabinet door 1, and are located in the upper and lower parts of the cabinet door 1, with the middle position being the panel wall of the cabinet door 1, thereby improving the strength of the cabinet door 1.

[0057] In one embodiment, such as Figure 2As shown, the air inlet 2 has a mounting boss 21 on the inner side near the cabinet door 1;

[0058] Mounting boss 21 surrounds the air intake;

[0059] Mounting boss 21 extends to a predetermined depth along the inner surface of cabinet door 1 toward air inlet 2;

[0060] The mounting boss 21 is attached to the back panel 4 on the outer side facing the cabinet door 1.

[0061] Specifically, to secure the rear panel 3, in this embodiment, a mounting boss 21 is provided on the inner side of the air inlet 2 near the cabinet door 1. The mounting boss 21 has a plate-like structure and extends a predetermined depth along the inner surface of the cabinet door 1 towards the air inlet 2, thereby forming an L-shaped structure in the cross-sectional direction of the air inlet. This L-shaped structure is arranged around the circumference of the air inlet 2.

[0062] When the rear panel 4 is pushed into the air inlet 2 from the front of the cabinet door 1, it abuts against the side of the mounting boss 21 facing the outside of the cabinet door 1. Then the front panel is installed in front and fixed by clamping on both sides.

[0063] In one embodiment, such as Figure 2 , 3 As shown, the air inlet 2 has a hook groove 22 around the outer side near the cabinet door 1;

[0064] The front panel 3 has a hook 31 on the side facing the cabinet door 1, corresponding to the position of the hook groove 22;

[0065] Hook 31 matches hook groove 22.

[0066] Specifically, to secure the front panel 3, in this embodiment, the air inlet 2 has a hook groove 22 around its outer side near the cabinet door 1. The hook groove is a structure formed by the opening in the cabinet door 1, roughly rectangular in shape and matching the size of the hook 31. The hook 31 has an L-shaped cross-section, extending a short distance from the inside of the front panel 3 towards the cabinet door 1, and then bending downwards to form a hook. During installation, the hook 31 is first pushed into the hook groove 22, and then lowered to engage with the hook groove 22 for fixation.

[0067] In one embodiment, to achieve a better fixing effect, the hook grooves 22 are distributed on the left and right sides of the air inlet, and three hook grooves 22 are arranged sequentially on each side along the vertical direction.

[0068] In one embodiment, such as Figure 4 As shown, when the preset waterproof requirement is IPX2, a cover structure 32 is also provided on the front panel;

[0069] The covering structure 32 has multiple isosceles trapezoidal structures in the side view direction;

[0070] The long side of the covering structure 32 is fitted to the front panel 2, and the sloping side extends forward and downward from the front panel 2;

[0071] The covering structure 32 is a hollow structure, with the lower surface of the covering structure 32 and the side near the front panel 2 left empty.

[0072] Specifically, this solution provides front panels 2 of different specifications to meet different waterproofing standards.

[0073] Specifically, when the preset waterproof requirements are IPX0 and IPX1, the following methods can be used: Figure 3 The front panel shown has a large number of rectangular holes to meet the ventilation requirements. Correspondingly, since the front panel 2 protrudes from the cabinet door 1, when the front panel 2 is attached to the cabinet door 1, the upper edge of the front panel 2 combines with the cabinet door 1 to form a water-blocking strip. Water dripping from the top will fall on the water-blocking strip and drip down along the front or side under the action of gravity and surface tension, without entering the inner side of the front panel 2.

[0074] When the preset waterproof requirement is IPX2, it is necessary to prevent vertical dripping when the outer shell is tilted at 15°. Therefore, a cover structure 32 with an isosceles trapezoidal structure is set on the basis of the open panel. The cover structure 32 is long and strip-shaped, which completely covers the open area in the left and right directions. The interval in the up and down directions is designed to ensure that water will not enter the open when the cabinet is tilted back 15 degrees.

[0075] In one embodiment, the rear panel 4 has a plurality of first openings distributed in a grid pattern;

[0076] Each of the first openings is fitted with a wire mesh with a rear panel opening.

[0077] Specifically, in order to achieve better installation strength and meet the replacement needs of dustproof nets of different specifications, in this embodiment, the rear panel 4 is first set as a frame structure with multiple first openings distributed in a grid pattern, and then wire mesh with rear panel openings is installed on the first openings respectively.

[0078] Among them, such as Figure 5 As shown, the protection requirements for unprotected solid foreign objects not less than 50mm and not less than 12.5mm are met by opening a 10mm oblique hole (i.e., IP0X, IP1X, and IP2X); as Figure 6 As shown, the protection requirement for solid foreign objects not smaller than 2.5mm is met by installing a 12-mesh stainless steel wire mesh (i.e., IP3X); as Figure 7As shown, the protection requirement for solid foreign objects not less than 1.0 mm is met by installing a 20-mesh stainless steel wire mesh (i.e., IP4X).

[0079] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cabinet door air inlet compatible with multiple IP protection requirements, disposed on the cabinet door, characterized in that, The air inlet is equipped with a front panel and a rear panel; The front panel faces the outside of the cabinet door, and the rear panel faces the inside of the cabinet door; The rear panel is installed in the air inlet, and the opening on the rear panel is determined according to the preset dustproof requirements; The front panel is mounted in front of the rear panel and protrudes from the cabinet door. The openings on the front panel are determined according to the preset waterproofing requirements.

2. The cabinet door air inlet according to claim 1, characterized in that, The air inlet is rectangular, and its long axis is aligned with the long axis of the cabinet door.

3. The cabinet door air inlet according to claim 1, characterized in that, The air inlet has a mounting protrusion on the inner side near the cabinet door; The mounting boss is arranged around the air inlet. The mounting boss extends a predetermined depth along the inner surface of the cabinet door toward the air inlet. The mounting boss is attached to the back panel on the side facing the cabinet door outwards.

4. The cabinet door air inlet according to claim 1, characterized in that, The air inlet has a hook groove around its outer side near the cabinet door; The front panel has hooks on the side facing the cabinet door, corresponding to the position of the hook groove; The hook matches the hook groove.

5. The cabinet door air inlet according to claim 4, characterized in that, The hook grooves are distributed on the left and right sides of the air inlet.

6. The cabinet door air inlet according to claim 1, characterized in that, When the preset waterproof requirement is IPX2, a covering structure is also provided on the front panel; The covering structure has multiple isosceles trapezoidal structures when viewed from the side. The long side of the covering structure is fitted to the front panel, and the sloping side extends forward and downward from the front panel; The covering structure is a hollow structure, with the lower surface and the side near the front panel left empty.

7. The cabinet door air inlet according to claim 1, characterized in that, The rear panel has multiple first openings distributed in a grid pattern; Each of the first openings is fitted with a wire mesh having the openings of the rear panel.

8. The cabinet door air inlet according to claim 1, characterized in that, The cabinet door has two air inlets along its upper edge in the vertical direction.

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