An outer maintenance waterproof sand-proof dust-filtering shutter

Abstract

This utility model discloses an externally maintained waterproof, sand-proof, and dust-filtering louver, relating to the field of louver manufacturing technology. It includes an outer frame assembly, an inner frame assembly, an anti-theft lock assembly, and a latch and socket assembly. (i) The inner frame assembly is located in the front-middle part of the inner cavity of the frame-like outer frame assembly. (ii) The anti-theft lock assembly includes one or more anti-theft locks 14 and corresponding lock holes 20. (iii) The latch and socket assembly includes a pair of latch seats 2 and a pair of latches 3. It features good waterproof, sand-proof, dust-filtering, and anti-theft effects, convenient disassembly and maintenance, and an external maintenance method. It is suitable for use in harsh weather and desert areas, such as in energy storage containers, photovoltaic inverters, box-type transformers, and mobile power supply vehicles.

Description

Technical Field

[0001] This utility model relates to the field of louver manufacturing technology, and in particular to a louver with external waterproof, sandproof and dust-filtering properties. Background Technology

[0002] In existing technologies, some equipment that must be enclosed for safety, especially those used in harsh weather and desert regions such as energy storage containers, photovoltaic inverters, box-type transformers, and mobile power vehicles, must dissipate heat through ventilation. Therefore, louvers are commonly used to achieve heat dissipation. Currently, there are many types of louvers on the market, each with different working principles, structures, and effects.

[0003] Chinese patent (patent application number 202323632202.1) discloses a "Conveniently Demountable Waterproof Louver," which includes a metal support frame and multiple rain-proof blades formed by bending sheet metal. The support frame includes two opposing support plates, and the multiple rain-proof blades are independently and detachably fixed between the two support plates. Each rain-proof blade includes, in sequence: a horizontal extension extending laterally to the middle of the support frame, a vertical extension vertically arranged on the rear side of the support frame, an inclined section extending to the front side of the support frame, and a rain-proof section vertically arranged on the front side of the support frame. The vertical extension of one rain-proof blade aligns with the inclined section or rain-proof section of the next rain-proof blade, and a heat dissipation channel is provided between them. An air vent is provided between the rain-proof sections of adjacent rain-proof blades. Compared with the prior art, when some rain-proof blades are damaged, they can be disassembled and replaced accordingly. Furthermore, the rain-proof section and the horizontal extension provide a double rain protection function, preventing water from splashing from the louver into the load box.

[0004] Another Chinese patent (patent application number 202321415177.9) discloses a "waterproof louver with quick-replaceable dustproof cotton," which includes a louver body comprising a window frame and louver blades horizontally arranged within the window frame. The louver blades have an elongated S-shaped cross-section, and a slot structure is formed on the back of the window frame. Dustproof cotton and a pressure plate are sequentially inserted into the slot structure, with the dustproof cotton located at the air inlet on the inner side of the louver blades, and the pressure plate pressing down on the dustproof cotton. This novel louver blade design with an elongated S-shaped structure effectively prevents raindrops from falling freely or at an angle to the vertical from entering, thus preventing water from entering the inside of the louver without affecting ventilation on both sides. The method of replacing the dustproof cotton is much more convenient and faster than the previous method of removing the entire pressure plate on the back.

[0005] Another Chinese patent (patent application number 201820997674.7) discloses a "waterproof venetian blind". The key technical points of its solution include a window frame that mainly serves as the installation base. Several slats are rotatably connected inside the window frame. A waterproof mesh fixing frame is rotatably connected to one side of the window frame. A waterproof mesh is installed in the waterproof mesh fixing frame. A rolling drum is horizontally provided at the top of the side of the window frame away from the waterproof mesh fixing frame. A roller blind for covering the slats is provided in the rolling drum. The advantage of this utility model is that it has multiple waterproof structures, which further improves the waterproof performance. Summary of the Invention

[0006] The technical problem to be solved by this utility model is to provide a louver with good waterproof, sandproof, dust filtering and anti-theft effects, convenient disassembly and maintenance, and external maintenance method.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is to design an externally maintained waterproof, sandproof and dust-filtering louver: including an outer frame assembly, an inner frame assembly, an anti-theft lock assembly and a plug socket assembly;

[0008] (i) The inner frame assembly is disposed in the front middle part of the inner cavity of the frame-shaped outer frame assembly;

[0009] (ii) The anti-theft lock assembly includes one or more anti-theft locks 14 and corresponding lock holes 20. The anti-theft locks 14 are located on the upper part of the inner frame assembly, and the corresponding lock holes 20 are located on the upper part of the inner cavity of the outer frame assembly.

[0010] (III) The plug socket assembly includes a pair of plug seats 2 and a pair of plugs 3. The pair of plugs 3 are respectively disposed on the left and right sides below the inner frame assembly, and the corresponding pair of plug seats 2 are respectively disposed on the lower left and right sides of the inner cavity of the outer frame assembly.

[0011] The outer frame assembly includes an outer frame body and an inner protective net 18; the outer frame body is a rectangular frame composed of four outer frame strips 1 connected by four outer frame planar right-angle brackets 9 and four outer frame vertical right-angle brackets 10; the inner protective net 18 is located on the rear side of the outer frame body; the lock hole 20 is located on the upper side of the inner cavity of the outer frame body; the pair of pin seats 2 are located on the lower left and right sides of the inner cavity of the outer frame body.

[0012] The inner frame assembly includes an inner frame body, two or more waterproof window leaf strips 7, and a dustproof and sand-filtering component; the inner frame body is a rectangular frame composed of four inner frame strips 6 connected by four inner frame planar right-angle brackets 8 and four inner frame vertical right-angle brackets 13, and the anti-theft lock 14 is located on the upper part of the inner frame body; the left and right ends of the waterproof window leaf strips 7 are respectively connected to the left and right sides of the inner cavity of the inner frame body; the dustproof and sand-filtering component is located on the rear part of the inner frame body.

[0013] The dustproof and sand-filtering component includes a dustproof and sand-filtering frame and a flame-retardant filter cotton 16. The dustproof and sand-filtering frame is a rectangular frame composed of four dustproof and sand-filtering frame bars 19 connected by four vertical right-angle brackets 11. The flame-retardant filter cotton 16 is disposed in the inner cavity of the dustproof and sand-filtering frame.

[0014] A dustproof and sand-filtering protective net 17 is also provided on the rear side of the flame-retardant filter cotton 16.

[0015] This utility model features an externally maintained waterproof, sand-proof, and dust-filtering louver. It employs S-shaped waterproof slats and combines flame-retardant filter cotton with a double-layer protective mesh, resulting in excellent waterproof, sand-proof, and dust-filtering performance. Furthermore, the outer frame assembly and inner frame assembly are integrated via an anti-theft lock assembly and a latch socket assembly, enhancing overall anti-theft capabilities. The inner frame assembly can also be opened from the outside or removed by unlocking and inserting / removing the latch, facilitating the replacement of the flame-retardant filter cotton and protective mesh. Therefore, its disassembly and maintenance are extremely convenient. Attached Figure Description

[0016] Figure 1 This is a front view schematic diagram of the present invention;

[0017] Figure 2 This is a right sectional view of the present invention along the AA axis;

[0018] Figure 3 This is a schematic diagram of the outward-open state of this utility model;

[0019] Figure 4 This is a partially enlarged schematic diagram of K in this utility model;

[0020] Figure 5 This is a partially enlarged schematic diagram of S in this utility model;

[0021] Figure 6 This is an enlarged cross-sectional view of the outer frame strip of this utility model;

[0022] Figure 7 This is an enlarged cross-sectional view of the inner frame strip of this utility model;

[0023] Figure 8 This is an enlarged cross-sectional schematic diagram of the dustproof and sand-filtering frame strip of this utility model;

[0024] Figure 9 This is an enlarged cross-sectional schematic diagram of the waterproof window leaf strip of this utility model.

[0025] In the picture:

[0026] 1 is the outer frame strip, 2 is the latch seat, 3 is the latch, 4 is the drainage notch, 5 is the dustproof and sand-filtering frame fixing bracket, 6 is the inner frame strip, 7 is the waterproof window leaf strip, 8 is the inner frame planar right-angle bracket, 9 is the outer frame planar right-angle bracket, 10 is the outer frame vertical right-angle bracket, 11 is the dustproof and sand-filtering frame vertical right-angle bracket, 12 is the mounting hole, 13 is the inner frame vertical right-angle bracket, 14 is the anti-theft lock, 15 is the outer frame body sealing strip, 16 is the flame-retardant filter cotton, 17 is the dustproof and sand-filtering protective net, 18 is the outer frame internal protective net, 19 is the dustproof and sand-filtering frame strip, 20 is the lock hole, 21 is the dustproof and sand-filtering frame sealing strip, 22 is the outer frame strip planar right-angle bracket groove, 23 is the front side of the outer frame strip, 24 is the outer frame strip water-retaining strip, 25 is the lower front side of the outer frame strip, 2 6 is the upper side of the outer frame strip, 27 is the rear side of the outer frame strip, 28 is the lower side of the outer frame strip, 29 is the inner protective mesh groove of the outer frame strip, 30 is the right-angle bracket groove of the inner frame strip, 31 is the front side of the inner frame strip, 32 is the front waterproof edge of the inner frame strip, 33 is the lower front side of the inner frame strip, 34 is the middle side of the inner frame strip, 35 is the upper rear side of the inner frame strip, 36 is the rear side of the inner frame strip, 37 is the horizontal edge of the dustproof filter frame, 38 is the front side of the dustproof filter frame, 39 is the rear side of the dustproof filter frame, 40 is the upper diagonal edge of the waterproof window leaf strip, 41 is the fixing groove of the waterproof window leaf strip, 42 is the reinforcing rib of the waterproof window leaf strip, 43 is the upper vertical edge of the waterproof window leaf strip, 44 is the middle diagonal edge of the waterproof window leaf strip, 45 is the lower vertical edge of the waterproof window leaf strip, and 46 is the lower diagonal edge of the waterproof window leaf strip. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings and embodiments. The following description is by way of example, but the scope of protection of the present invention should not be limited thereto.

[0028] The directions in this instruction manual and its accompanying drawings are explained as follows:

[0029] Figure 1 The front is the actual front, the inside is the actual back; the top is the actual top, the bottom is the actual bottom; the left and right are the actual left and right respectively.

[0030] Figure 2 , 3 The front of numbers 4, 5, 7, 8, and 9 represents the actual right side, while the inside represents the actual left side; the right side represents the actual back, and the left side represents the actual front; the top and bottom represent the actual upper and lower sides, respectively.

[0031] Example:

[0032] The externally maintained waterproof, sandproof, and dust-filtering louver of this embodiment is composed of an outer frame assembly, an inner frame assembly, an anti-theft lock assembly, and a latch socket assembly.

[0033] The anti-theft lock assembly consists of one or more anti-theft locks 14 (two in this example, left and right) and their corresponding keyholes 20.

[0034] The plug socket assembly consists of a pair of plug sockets 2 and a pair of plugs 3.

[0035] The outer frame assembly consists of the outer frame body and the inner protective mesh 18 of the outer frame.

[0036] The outer frame is composed of four outer frame strips 1 connected by four outer frame planar right angle brackets 9 (used to form a rectangular frame) and four outer frame vertical right angle brackets 10 (i.e.: The shape, used to fix the outer frame strip 1), is a rectangular frame composed of these elements (see details). Figure 1 (As shown).

[0037] Outer frame strip 1 is a profile formed by extrusion (see details). Figure 6 As shown, it consists of the front side 23 of the outer frame strip, the water-retaining strip 24 of the outer frame strip, the lower front side 25 of the outer frame strip, the upper middle side 26 of the outer frame strip, the rear side 27 of the outer frame strip, the lower middle side 28 of the outer frame strip, and the inner protective mesh groove 29 of the outer frame strip. The front side 23 of the outer frame strip forms the front side of the outer frame body. A right-angle bracket groove 22 is provided at the lower rear of the outer frame strip for inserting the right-angle bracket 9 of the outer frame. A groove is also formed above the right-angle bracket groove 22 of the outer frame strip for installing the sealing strip 15 of the outer frame body. The left end of the lower front side 25 of the outer frame strip (actually a flat rectangular tube to enhance its strength and rigidity) is connected to the upper end of the front side 23 of the outer frame strip, and its right end is connected to... The lower end of the upper side 26 of the outer frame strip forms a secondary waterproof step. The water-blocking strip 24 of the outer frame strip is vertically set in the middle of the lower front side 25 of the outer frame strip, forming a primary waterproof partition. Two or more drainage notches 4 are provided on the water-blocking strip 24. The lower middle part of the rear side 27 of the outer frame strip connects to the right end of the upper side 26 of the outer frame strip, forming a tertiary waterproof partition. The inner protective net groove 29 of the outer frame strip is set behind the lower end of the rear side 27 of the outer frame strip for inserting the inner protective net 18 of the outer frame. The left and right ends of the lower side 28 of the outer frame strip are respectively connected to the lower part of the upper side 26 of the outer frame strip and the lower part of the rear side 27 of the outer frame strip, and are higher than the lower side of the lower front side 25 of the outer frame strip. The groove formed is used to insert the vertical right-angle bracket 10 of the outer frame (see details). Figure 5 As shown). The lock hole 20 in the anti-theft lock assembly is located below the lower front side 25 of the outer frame strip (i.e., the lower side of the flat rectangular tube), and a pair of pin seats 2 are respectively located at the lower part of the outer frame strip 1 on the left and right sides of the outer frame body (i.e., the front part of the lower front side 25 of the outer frame strip).

[0038] The inner frame assembly consists of an inner frame body, two or more (eight in this example) waterproof window leaf strips 7, and dustproof and sand-filtering components.

[0039] The inner frame is composed of four inner frame strips 6 connected by four inner frame planar right-angle brackets 8 (used to form a rectangular frame) and four inner frame vertical right-angle brackets 13 (i.e.: The shape, used to fix the inner frame strips 6) forms a rectangular frame (see details). Figure 1 (As shown).

[0040] Inner frame strip 6 is also a profile formed by extrusion (see details). Figure 7 (As shown), it is composed of the front side 31 of the inner frame strip, the front waterproof edge 32 of the inner frame strip, the front lower side 33 of the inner frame strip, the middle side 34 of the inner frame strip, the rear upper side 35 of the inner frame strip, and the rear side 36 of the inner frame strip; the front side 31 of the inner frame strip forms the front side of the inner frame body, and a right-angle bracket groove 30 is provided at the lower rear part of it for inserting the right-angle bracket 8 of the inner frame; the left and right ends of the front lower side 33 of the inner frame strip are respectively connected to the upper end of the front side 31 of the inner frame strip and the middle side 34 of the inner frame strip. In the lower middle section, the front waterproof edge 32 of the inner frame strip is vertically positioned at the front middle of the lower front side 33 of the inner frame strip, forming a primary waterproof partition. The middle side 34 of the inner frame strip then becomes a secondary waterproof partition. The left and right ends of the upper rear side 35 of the inner frame strip are respectively connected to the middle of the rear side of the middle side 34 and the upper end of the rear side 36 of the inner frame strip. The lower middle part of the front side of the rear side 36 of the inner frame strip is connected to the rightward extension of the lower front side 33 of the inner frame strip. The groove formed is used to insert the vertical right-angle bracket 13 of the inner frame (see details). Figure 5 (As shown). The cavity formed by the inner frame strip's middle side 34 and the inner frame strip's rear upper side 35 is used to install the dustproof and sand-filtering components.

[0041] On the lower front side 33 of the inner frame strip 6 at the lower part of the inner frame body, there is one or more inner frame drainage holes (not shown in the figure) to drain the water that enters the groove formed by the front waterproof edge 32, the lower front side 33, and the middle side 34 of the inner frame strip into the groove formed by the outer frame water baffle strip 24, the lower front side 25, and the upper middle side 26 of the outer frame strip at the lower part of the outer frame body, and then drain it out through the drainage notch 4 opened on the outer frame water baffle strip 24.

[0042] The dustproof and sand-filtering component consists of a dustproof and sand-filtering frame, flame-retardant filter cotton 16, and a dustproof and sand-filtering protective net 17.

[0043] The dustproof filter frame is composed of four dustproof filter frame strips 19 connected by four vertical right-angle brackets 11 (i.e.: The shape is used to fix the dustproof and sand-filtering frame strips 19) to form a rectangular frame (see details). Figure 1 and Figure 2 The rectangular frame is composed of the following components (as shown).

[0044] Dustproof filter frame strip 19 is also a profile formed by extrusion (see details). Figure 8As shown, it is H-shaped and consists of a horizontal side 37 (actually a flat rectangular tube to enhance its strength and rigidity), a front side 38, and a rear side 39 of the dust filter frame. The two ends of the horizontal side 37 are connected to the lower middle part of the rear side of the front side 38 and the front side of the rear side 39 of the dust filter frame, respectively. The groove formed on the top is used to insert the flame-retardant filter cotton 16 (front side) and the dust filter protective net 17 (rear side, which supports the flame-retardant filter cotton 16), and is fixed by the dust filter frame fixing bracket 5 inserted at the lower end of the dust filter frame strip 19. The groove formed by the lower side of the horizontal side 37 of the dust filter frame, the lower rear side of the front side 38 of the dust filter frame, and the lower front side of the rear side 39 of the dust filter frame is used to insert the vertical right-angle bracket 11 of the dust filter frame.

[0045] The anti-theft lock 14 in the anti-theft lock assembly is located on the front side 31 of the inner frame strip 6 on the upper part of the inner frame body, which corresponds to the lock hole 20 below the lower front side 25 of the outer frame strip 1 on the upper part of the outer frame body (see details). Figure 4 (As shown).

[0046] A pair of pins 3 are respectively located on the left and right ends of the lower front side 33 of the inner frame strip 6 at the lower part of the inner frame body, corresponding to a pair of pin seats 2 at the lower part of the outer frame strip 1 on the left and right sides of the outer frame body (see details). Figure 1 and Figure 5 ).

[0047] Waterproof window slat 7 is also a profile formed by extrusion (see details). Figure 9 As shown, it is composed of the upper oblique side 40, the upper vertical side 43, the middle oblique side 44, the lower vertical side 45, and the lower oblique side 46 of the waterproof window leaf strip.

[0048] The upper bevel 40 and lower bevel 46 of the waterproof window slat are narrower than the upper vertical edge 43, middle bevel 44, and lower vertical edge 45 of the waterproof window slat. The upper bevel 40 is shaped with a lower left side and a higher right side, with its right end connecting to the upper end of the upper vertical edge 43. The middle bevel 44 is also shaped with a lower left side and a higher right side, with its left and right ends connecting to the upper end of the lower vertical edge 45 and the lower end of the upper vertical edge 43, respectively. The lower bevel 46 is shaped with a higher left side and a lower right side, with its upper end connecting to the lower end of the lower vertical edge 45. A fixing groove 41 is provided on the waterproof window leaf strip at the inner corner where the upper inclined side 40 and the upper vertical side 43 of the waterproof window leaf strip connect, and at the inner corner where the lower vertical side 45 and the lower inclined side 46 of the waterproof window leaf strip connect. At the same time, 1-2 waterproof window leaf strip reinforcing ribs 42 are provided on the front side of the upper vertical side 43 of the waterproof window leaf strip, the lower side of the middle inclined side 44 of the waterproof window leaf strip, and the rear side of the lower vertical side 45 of the waterproof window leaf strip.

[0049] The waterproof window leaf 7 is installed in the cavity formed by the front waterproof edge 32 of the inner frame strip, the front lower edge 33 of the inner frame strip, and the middle edge 34 of the inner frame strip. The left and right ends of the waterproof window leaf 7 are connected to the front lower edge 33 of the inner frame strip 6 on the left and right sides of the inner frame body by screws and waterproof window leaf 7 fixing grooves 41, respectively. The front waterproof edge 32 of the inner frame strip can cover the left and right ends and the top and bottom waterproof window leaf 7.

[0050] Before use, the outer waterproof, sandproof and dust-filtering louver of this utility model is fixed to the encapsulation surface of the equipment through the mounting hole 12. The outer frame sealing strip 15 can isolate the outer frame from the encapsulation surface of the equipment, preventing rainwater from entering the encapsulation of the equipment through the outer frame.

[0051] During use, the heat generated by the equipment (i.e., hot air) flows through the gaps formed by the upper and middle parts of the inner protective mesh 18, dustproof and sand-filtering protective mesh 17, and flame-retardant filter cotton 16, towards the upper and middle parts of the waterproof window slats 7, and then dissipates to the outside of the equipment enclosure. Simultaneously, the relatively cooler external air flows along the opposite path into the interior of the equipment enclosure, thus achieving heat dissipation. During the flow of external air into the equipment enclosure, the flame-retardant filter cotton 16 filters out dust and sand contained in the air.

[0052] When it's windy and rainy, the wind carries the rainwater towards the blinds:

[0053] First, the first-level waterproof partition formed by the front waterproof edge 32 of the inner frame strip 6 of the inner frame body prevents some rainwater from entering the cavity surrounded by the front waterproof edge 32 of the inner frame strip, the front lower side edge 33 of the inner frame strip, and the middle side edge 34 of the inner frame strip.

[0054] Secondly, rainwater hitting the front side of the waterproof window leaf 7 will flow down the front side of the waterproof window leaf 7 into the cavity formed by the front waterproof edge 32 of the inner frame strip, the front lower side edge 33 of the inner frame strip, and the middle side edge 34 of the inner frame strip. At this time, the secondary waterproof partition formed by the middle side edge 34 of the inner frame strip 6 of the inner frame body will isolate it and discharge it to the lower part of the outer frame body through the inner frame drainage hole.

[0055] Thirdly, rainwater entering through the gap between the outer frame and the inner frame is blocked by the outer frame strip 1 and the outer frame strip 24 (primary waterproof partition). The outer frame strip has a blocking (secondary waterproof step) on the upper side 26 and a blocking (tertiary waterproof partition) on the rear side 27. At the same time, the rainwater that gathers in the cavity formed by the outer frame strip 1 water-blocking strip 24, the lower front side 25, the upper middle side 26, and the rear side 27 of the outer frame strip, as well as the rainwater that flows down from the inner frame through the inner frame drainage hole, all flow to the outside through the drainage gap 4 opened on the outer frame strip water-blocking strip 24, thus effectively realizing its waterproof function.

[0056] When maintenance or replacement of the flame-retardant filter cotton 16 is required, first open the anti-theft lock 14 with the anti-theft lock key. Then, pull the upper part of the inner frame outward, causing the pair of pins 3 at the bottom of the inner frame to rotate 90 degrees around the pair of pin seats 2 at the bottom of the outer frame strips 1 on the left and right sides of the outer frame (see details). Figure 3 As shown), the dustproof filter frame can be removed for maintenance or replacement of the flame-retardant filter cotton 16; if the inner frame assembly needs to be removed, simply push a pair of pins 3 toward the middle to disengage them from the pin seat 2, and the inner frame assembly can be removed. Therefore, its disassembly and maintenance are extremely convenient, and it adopts an external maintenance method.

[0057] This utility model features an externally protected waterproof, sandproof, and dust-filtering louver, suitable for use in harsh weather and desert areas, such as energy storage containers, photovoltaic inverters, box-type transformers, and mobile power supply vehicles.

Claims

1. An externally maintained, waterproof, sand-proof, dust-proof, and filter-dust louver comprising an outer frame assembly, characterized in that: It also includes an inner frame assembly, a burglar-proof lock assembly, and a plug socket assembly; The inner frame assembly is disposed in the front middle part of the inner cavity of the frame-shaped outer frame assembly; The anti-theft lock assembly includes one or more anti-theft locks (14) and corresponding lock holes (20). The anti-theft locks (14) are located on the upper part of the inner frame assembly, and the corresponding lock holes (20) are located on the upper part of the inner cavity of the outer frame assembly. The plug socket assembly includes a pair of plug seats (2) and a pair of plugs (3). The pair of plugs (3) are respectively located on the left and right sides below the inner frame assembly, and the corresponding pair of plug seats (2) are respectively located on the lower left and right sides of the inner cavity of the outer frame assembly.

2. The externally-maintained, waterproof, sand-proof, and dust-proof louvered window according to claim 1, characterized in that: The outer frame assembly includes an outer frame body and an inner protective net (18); the outer frame body is a rectangular frame composed of four outer frame strips (1) combined with four outer frame planar right angle brackets (9) and four outer frame vertical right angle brackets (10); the inner protective net (18) is located on the rear side of the outer frame body; the lock hole (20) is located on the upper side of the inner cavity of the outer frame body; the pair of pin seats (2) are located on the lower left and right sides of the inner cavity of the outer frame body.

3. The externally maintained waterproof, sandproof, and dust-filtering louver according to claim 2, characterized in that: The inner frame assembly includes an inner frame body, two or more waterproof window leaf strips (7), and a dustproof and sand-filtering component; the inner frame body is a rectangular frame composed of four inner frame strips (6) combined with four inner frame planar right-angle brackets (8) and four inner frame vertical right-angle brackets (13), and the anti-theft lock (14) is located on the upper part of the inner frame body; the left and right ends of the waterproof window leaf strips (7) are respectively connected to the left and right sides of the inner cavity of the inner frame body; the dustproof and sand-filtering component is located on the rear part of the inner frame body.

4. The externally maintained waterproof, sandproof, and dust-filtering louver according to claim 3, characterized in that: The dustproof and sand-filtering component includes a dustproof and sand-filtering frame and flame-retardant filter cotton (16); the dustproof and sand-filtering frame is a rectangular frame composed of four dustproof and sand-filtering frame bars (19) connected by four vertical right-angle brackets (11), and the flame-retardant filter cotton (16) is placed in the inner cavity of the dustproof and sand-filtering frame.

5. The externally maintained waterproof, sandproof, and dust-filtering louver according to claim 4, characterized in that: A dustproof and sand-filtering protective net (17) is also provided on the rear side of the flame-retardant filter cotton (16).

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