A filter for low-resistance, high-ventilation air purifiers

Abstract

This utility model discloses a filter for a low-resistance, high-ventilation air purifier, comprising an inner frame and a fixed frame installed inside the air purifier. One end of the fixed frame has a bottom frame, and the other end is inclined to form a guide section. The inner frame is inserted into the fixed frame, and a filter is installed in the inner frame. The filter has a serpentine structure, with guide plates installed at the concave parts of the filter, each guide plate having multiple ventilation holes. This utility model has a simple structure. The guide plates direct air along their inclined surfaces to both sides of the arched parts of the filter, allowing for full utilization of the air on the arched sides. Furthermore, the ventilation holes on the guide plates allow some air to pass through and be filtered from the concave parts of the filter. This filter is an electret filter, with a more porous physical structure and larger fiber spacing, significantly reducing air resistance and achieving high ventilation.

Description

Technical Field

[0001] This utility model relates to the field of air purifier technology, specifically to an air purifier filter with low resistance and high ventilation. Background Technology

[0002] An air purifier is a household appliance whose core function is to draw in dirty indoor air through a built-in fan and filtration system, filter out pollutants, and then release clean air. It is a device that provides internal air circulation and purification for a specific space (such as a room).

[0003] Currently, the filters used in air purifiers are generally traditional fiberglass filters. Fiberglass HEPA filters rely on mechanical interception (sieving, impact, diffusion) to capture particulate matter. To efficiently capture particles as small as 0.3 microns, the fibers must be extremely dense and fine. This is like trying to get air through a thick wall, resulting in extremely high resistance and affecting ventilation. Furthermore, to increase the filtration area, current filters are generally designed with a serpentine structure. However, the arched parts of these filters are often too close together, easily crowding together and preventing the arched parts from fully contacting the air, thus affecting the full utilization of the filter. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to provide a filter for an air purifier with low resistance and high ventilation. The filter can guide air to the side of the arched part of the filter through the guide plate to ensure the full utilization of the filter and solve the problems mentioned in the background art.

[0005] This utility model is achieved through the following technical solution: a filter screen for a low-resistance, high-ventilation air purifier, comprising an inner frame and a fixed frame installed inside the air purifier. One end of the fixed frame is fitted with a bottom frame, and the other end is inclined to form a guide section. The inner frame is inserted into the fixed frame and is in contact with the bottom frame. A filter screen is installed in the inner frame. The filter screen is arranged in a serpentine structure. A guide plate is installed in the concave part of the filter screen. Multiple air vents are provided on the guide plate. Multiple positioning mechanisms that are engaged with the bottom frame are installed on the end face of the inner frame facing the bottom frame.

[0006] As a preferred technical solution, the positioning mechanism includes a fixing plate, a locking strip, and multiple compression springs. The fixing plate is installed on one end face of the inner frame, and the other end of the fixing plate passes through the inner hole of the bottom frame. The outer side of the fixing plate is provided with a groove. A part of the locking strip is inserted into the groove and is equipped with multiple compression springs. The other end of the compression spring is installed on the inner wall of the groove. The other part of the locking strip is set to the outside and abuts against the bottom surface of the bottom frame. The cross-section of the exposed part of the locking strip is set with an arc-shaped structure.

[0007] As a preferred technical solution, a first frame-shaped groove is formed by recessing the inner frame on one end face facing the bottom frame. A first rubber layer is installed in the first frame-shaped groove and abuts against the bottom frame. A second frame-shaped groove is formed by recessing the outer side face of the inner frame. A second rubber layer is installed in the second frame-shaped groove and abuts against the inner side face of the fixed frame.

[0008] As a preferred technical solution, the cross-section of the deflector is set in a triangular structure.

[0009] As a preferred technical solution, the arched part of the filter screen is designed with a "U" shape.

[0010] As a preferred technical solution, the filter screen is an electret filter screen.

[0011] As a preferred technical solution, the outer side of the fixing frame is provided with multiple screw holes.

[0012] The beneficial effects of this utility model are as follows: This utility model has a simple structure. A guide plate is installed in the concave part of the filter screen. The air can be guided along the inclined surface of the guide plate to both sides of the arched part of the filter screen, so that the air can be fully utilized on the side of the arched part. In addition, the guide plate is provided with ventilation holes, and some air can be filtered and passed through the concave part of the filter screen through the ventilation holes, which can fully utilize the side of the concave part and the arched part. Moreover, the filter screen is an electret filter screen, which has a more loose physical structure and can have a larger fiber spacing, thereby greatly reducing the resistance to air passage to achieve a high ventilation effect. In addition, the inner frame is easy to disassemble, which facilitates subsequent replacement. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a bottom view of the present invention;

[0016] Figure 3 This is a schematic diagram of the inner frame of this utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the guide plate of this utility model.

[0018] The components are: 1. Inner frame; 2. Filter screen; 3. Guide plate; 4. Fixing frame; 5. Guide section; 6. Screw hole; 7. Bottom frame; 8. Fixing plate; 9. Clip; 10. Second rubber layer; 11. First rubber layer. Detailed Implementation

[0019] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0020] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0021] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0022] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this utility model discloses an air purifier filter for low resistance and high ventilation, comprising an inner frame 1 and a fixed frame 4 installed inside the air purifier. One end of the fixed frame 4 is fitted with a bottom frame 7, and the other end is inclined to form a guide section 5. The inner frame 1 is inserted into the fixed frame 4 and is in contact with the bottom frame 7. A filter screen 2 is installed in the inner frame 1. The filter screen 2 is arranged in a serpentine structure. A guide plate 3 is installed in the concave part of the filter screen 2. The guide plate 3 is provided with multiple air holes. Multiple positioning mechanisms that are engaged with the bottom frame 7 are installed on the end face of the inner frame 1 facing the bottom frame 7.

[0023] In this embodiment, the positioning mechanism includes a fixing plate 8, a locking strip 9, and multiple compression springs. The fixing plate 8 is installed on one end face of the inner frame 1, and the other end of the fixing plate 8 passes through the inner hole of the bottom frame 7. The outer side of the fixing plate 8 is provided with a groove. A part of the locking strip 9 is inserted into the groove and multiple compression springs are installed in it. The other end of the compression springs is installed on the inner wall of the groove. The other part of the locking strip 9 is set outside and abuts against the bottom surface of the bottom frame 7. The cross-section of the exposed part of the locking strip 9 is set with an arc-shaped structure.

[0024] The clips facilitate the disassembly and assembly of the inner frame. When the inner frame is pulled up, the clips are pressed into the groove by the straightened bottom frame, allowing the inner frame to be removed directly, making disassembly and assembly easier.

[0025] In this embodiment, a first frame-shaped groove is formed by recessing one end face of the inner frame 1 facing the bottom frame 7. A first rubber layer 11 is installed in the first frame-shaped groove and abuts against the bottom frame 7. A second frame-shaped groove is formed by recessing the outer side face of the inner frame 1. A second rubber layer 10 is installed in the second frame-shaped groove and abuts against the inner side face of the fixed frame 4.

[0026] The first rubber layer increases the sealing between the inner frame and the bottom frame, while the second rubber layer increases the sealing between the inner frame and the fixed frame.

[0027] In this embodiment, the cross-section of the guide plate 3 is arranged in a triangular structure, which can provide a diversion and guidance function.

[0028] In this embodiment, the arched part of the filter screen 2 is arranged in a "U" shape, so that the front of the arch is arranged in a horizontal structure, which allows airflow to pass through quickly.

[0029] In this embodiment, filter 2 is an electret filter, which is a filter material that is processed through a special process to store electrostatic charges for a long time. It uses the attraction of an electrostatic field to capture particulate matter in the air, thereby achieving extremely high filtration efficiency while maintaining low air resistance.

[0030] In this embodiment, the outer side of the fixing frame 4 is provided with a plurality of screw holes 6, and the screws on the device can be threaded into the screw holes, thereby fixing the fixing frame inside.

[0031] Working principle: Currently, the airflow will be concentrated in front of the "arched" (U-shaped top) of the filter screen, because this is where the airflow directly impacts and has the shortest path. This will lead to excessively high local flow velocity, increased resistance, and uneven utilization of the filter screen material - the middle part is worn out quickly, while the sides may not participate in filtration at all.

[0032] Therefore, this device installs a deflector plate at the concave part of the filter screen. The triangular deflector plate forms an inclined reflective surface. When the mainstream air rushes towards the filter screen, some of the airflow that would have hit the dead zone at the "bottom" will now hit the inclined surface of the deflector plate. According to the principles of fluid dynamics, the airflow will be guided by this inclined surface and diverted to the "arched" parts of the filter screen on both sides (the sides of the U-shaped structure). This is like setting up a traffic diversion sign on a congested main road to divert vehicles to the auxiliary roads on both sides in advance. This allows the side area of ​​the filter screen, which was originally not used much, to also undertake the filtration task, making the filtration area of ​​the entire filter screen material more even and efficient. It avoids all the airflow being squeezed at the top of the "arched" point. After diversion, the local flow velocity is reduced, and the pressure difference (i.e., resistance) before and after the entire filter screen is reduced.

[0033] The vents on the baffle plate are key. They do not completely seal off the low-lying areas, and some airflow will still pass directly through these vents and through the filter screen in the low-lying areas. Since the electret filter screen itself is fluffy and has low resistance, this path becomes a low-resistance bypass channel. This part of the airflow that directly penetrates is almost unimpeded by the baffle plate and passes through the filter screen with low resistance, directly increasing the airflow per unit time (ventilation volume). This allows the filter material in the low-lying areas that might otherwise be wasted to participate in the filtration work.

[0034] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. A filter for a low-resistance, high-ventilation air purifier, characterized in that: It includes an inner frame (1) and a fixed frame (4) installed inside the air purifier. One end of the fixed frame (4) is equipped with a bottom frame (7), and the other end is inclined to form a guide section (5). The inner frame (1) is inserted into the fixed frame (4) and is in contact with the bottom frame (7). A filter screen (2) is installed in the inner frame (1). The filter screen (2) is arranged in a serpentine structure. A guide plate (3) is installed in the concave part of the filter screen (2). A number of ventilation holes are provided on the guide plate (3). A number of positioning mechanisms that are engaged with the bottom frame (7) are installed on the end face of the inner frame (1) facing the bottom frame (7).

2. The air purifier filter for low resistance and high ventilation according to claim 1, characterized in that: The positioning mechanism includes a fixing plate (8), a clip (9) and multiple compression springs. The fixing plate (8) is installed on one end face of the inner frame (1), and the other end of the fixing plate (8) passes through the inner hole of the bottom frame (7). The outer side of the fixing plate (8) is provided with grooves. Part of the clip (9) is inserted into the groove and is equipped with multiple compression springs. The other end of the compression spring is installed on the inner wall of the groove. The other part of the clip (9) is set outside and is in contact with the bottom surface of the bottom frame (7). The cross section of the exposed part of the clip (9) is set in an arc shape.

3. The air purifier filter for low resistance and high ventilation according to claim 1, characterized in that: The inner frame (1) is recessed on one end face facing the bottom frame (7) to form a first frame groove. A first rubber layer (11) is installed in the first frame groove and the first rubber layer (11) is in contact with the bottom frame (7). A second frame-shaped groove is formed by recessing on the outer side of the inner frame (1). A second rubber layer (10) is installed in the second frame-shaped groove. The second rubber layer (10) is in contact with the inner side of the fixed frame (4).

4. The air purifier filter for low resistance and high ventilation according to claim 1, characterized in that: The cross-section of the guide vanes (3) is set in a triangular structure.

5. The air purifier filter for low resistance and high ventilation according to claim 1, characterized in that: The arched part of the filter screen (2) is set in a "U" shape.

6. The air purifier filter for low resistance and high ventilation according to claim 1, characterized in that: The filter screen (2) is made of electret filter screen.

7. The air purifier filter for low resistance and high ventilation according to claim 1, characterized in that: Multiple screw holes (6) are provided on the outer side of the fixing frame (4).

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