Fresh air filtering device with self-cleaning function

Abstract

The utility model discloses a fresh air filtering device with a self-cleaning function, and relates to the technical field of fresh air filtering, the fresh air filtering device comprises a fan cover, a dust separation chamber is arranged in the fan cover, a cyclone chamber is arranged in the fan cover at one side of the dust separation chamber, and a filtering baffle plate is movably arranged in the cyclone chamber. According to the fresh air filtering device with the self-cleaning function, the filtering baffle has two states including the stretching state and the contracting state, airflow gradually gets close to the center of the cylinder, the rotating radius can be gradually decreased, the rotating speed can be gradually increased, and the airflow can pass through the filtering baffle in the contracting state; as the direction of the cross section of the filtering baffle is perpendicular to the spiral wind direction, the airflow can rapidly steer and continuously surges to the air outlet, at the moment, the smaller the gap between the multiple baffle blades in the filtering baffle is, the larger the wind resistance is, the better the filtering effect is, and the gap can be flexibly adjusted according to needs.

Description

Technical Field

[0001] The utility model relates to the technical field of fresh air filtering, in particular to a fresh air filtering device with a self-cleaning function. Background Art

[0002] The fresh air system is based on using special equipment to deliver fresh air into the room on one side of a closed room, and then exhausting it to the outside from the other side by special equipment, forming a "fresh air flow field" indoors, thereby meeting the needs of indoor fresh air ventilation.

[0003] The current fresh air filtration system usually uses sponges or dust nets to filter out dust and other particles in the air, but the biggest disadvantage of this filtration method is frequent maintenance. Because there are too many dust particles in the outdoor air, when the internal air circulation is at a higher flow rate, the filter will be blocked, thus affecting the fresh air function. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the shortcomings of the prior art, the utility model provides a fresh air filtering device with a self-cleaning function, which solves the technical problem that the fresh air filtering system usually uses sponges or dust-proof nets to filter out dust and other particulate matter in the air, but the biggest disadvantage of this filtering method is frequent maintenance. Since there are too many dust particles in the outdoor air, when the internal air circulation is at a higher flow rate, the filter will be blocked, thereby affecting the fresh air function.

[0006] (II) Technical solution

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A fresh air filter device with a self-cleaning function, the fresh air filter device comprising a hood, a dust chamber is arranged inside the hood, a cyclone chamber is arranged inside the hood located on one side of the dust chamber, a filter baffle is movably installed inside the cyclone chamber, a plurality of baffle blades are arranged on the surface of the filter baffle, a partition plate is fixedly installed at the bottom end of the filter baffle, and a plug plate is fixedly installed inside the hood;

[0009] Among them, the filter baffle has two states, the extended state and the contracted state. The cyclone chamber is cylindrical, and the airflow makes a spiral motion in the cyclone chamber. The dust chamber and the cyclone chamber are separated by a plug plate. The cyclone chamber is a complete cylinder, and one side of the dust chamber is concave inward, and the dust chamber and the cyclone chamber intersect with each other.

[0010] Preferably, the outer surface and inner surface of each baffle blade are arc-shaped, and the arc tip points in the counterclockwise direction during installation.

[0011] The partition plate is installed at the bottom of the filter baffle to separate the cyclone chamber into two parts, the upper and lower parts.

[0012] An annular filter element is installed inside the filter baffle, and a bottom plate is fixedly installed at the bottom end of the wind cover;

[0013] Among them, a sealing ring is installed on the top of the bottom plate. At the same time, the material of the annular filter element can be sponge, non-woven fabric, HEPA, etc., and different filter elements can be selected and adjusted according to the filtered substances.

[0014] Preferably: an air outlet is fixedly installed at the top of the cyclone chamber, and a square hole is opened at the top of the plug plate;

[0015] The dust chamber and the cyclone chamber are separated by an arc-shaped plug plate, a square hole is opened at the top of the plug plate, and the dust chamber and the cyclone chamber are connected through the square hole. The square hole is tangent to the cylindrical wall, and the other side of the air outlet extends to the middle of the cyclone chamber. The air inlet is fixedly installed on the surface of the cyclone chamber.

[0016] The air inlet is installed in a horizontal direction and is tangent to the surface of the cyclone chamber, and a coarse mesh filter is arranged inside the air inlet.

[0017] (III) Beneficial effects

[0018] 1. After the fresh air filtration device has been running for a period of time, the filter baffle of the third filtration and the annular filter element of the fourth filtration will gradually become clogged, causing the wind pressure to drop. When it is detected that the wind pressure has dropped to the threshold, the self-cleaning mode is turned on, the bottom plate is opened, the foreign matter trapped on the top of the bottom plate is poured out, and the retractable filter baffle is adjusted to the extended state. The fan blows in the opposite direction at high power to blow out the foreign matter that blocks the filter baffle and the annular filter element, thus avoiding disassembly and achieving the effect of self-cleaning and maintenance-free.

[0019] 2. The filter baffle has two states, an extended state and a retracted state. In the extended state, the baffle blades open vertically along the circumference, and the gap between the baffle blades reaches the maximum. In the retracted state, the baffle blades rotate counterclockwise until the gap between the baffle blades is reduced to a suitable state. The smaller the gap between the multiple baffle blades inside the filter baffle, the greater the wind resistance and the better the filtering effect. The gap can be flexibly adjusted according to needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings.

[0021] Figure 1 This is a structural diagram of the wind hood of the utility model;

[0022] Figure 2 This is a structural diagram of the cyclone chamber of the utility model;

[0023] Figure 3 This is a structural diagram of the filter baffle of the utility model;

[0024] Figure 4 It is the structural diagram of the annular filter element of the utility model.

[0025] Legend: 1. Wind hood; 11. Dust chamber; 12. Cyclone chamber; 13. Air inlet; 14. Air outlet; 15. Square hole; 16. Partition plate; 17. Filter baffle; 19. Ring filter element; 21. Bottom plate; 22. Baffle blades; 23. Insert plate. DETAILED DESCRIPTION

[0026] The embodiment of the present application provides a fresh air filter device with a self-cleaning function, which effectively solves the problem that the fresh air filter system usually uses sponges or dustproof nets to filter out dust and other particulate matter in the air. However, the biggest disadvantage of this filtering method is frequent maintenance. Since there are too many dust particles in the outdoor air, when the internal air circulation is at a higher flow rate, the filter net will be blocked, thereby affecting the fresh air function. After the fresh air filter device has been running for a period of time, the filter baffle of the third filtration and the annular filter element of the fourth filtration will gradually be blocked, resulting in a drop in wind pressure. When it is detected that the wind pressure has dropped to a threshold, the self-cleaning mode is turned on, the bottom plate is opened, and the foreign matter trapped on the top of the bottom plate is poured out, and the retractable filter baffle is adjusted to an extended state. The fan blows in reverse at high power to blow out foreign matter that blocks the filter baffle and the annular filter element, thereby avoiding disassembly, thereby achieving a self-cleaning and maintenance-free effect. Example

[0027] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the technical solution in the embodiment of the present application is to effectively solve the problem that the fresh air filtration system usually uses sponge or dustproof net to filter out dust and other particles in the air, but the biggest disadvantage of this filtration method is frequent maintenance. Since there are too many dust particles in the outdoor air, when the internal air circulation is at a high flow rate, the filter will be blocked, thereby affecting the technical problem of the fresh air function. The overall idea is as follows:

[0028] In view of the problems existing in the prior art, the utility model provides a fresh air filtering device with a self-cleaning function, the fresh air filtering device comprising a hood 1, a dust chamber 11 is arranged inside the hood 1, a cyclone chamber 12 is arranged inside the hood 1 on one side of the dust chamber 11, a filter baffle 17 is movably installed inside the cyclone chamber 12, a plurality of baffle blades 22 are arranged on the surface of the filter baffle 17, a partition plate 16 is fixedly installed at the bottom end of the filter baffle 17, a plug plate 23 is fixedly installed inside the hood 1, the bottom plate 21 is opened, foreign matter trapped on the top of the bottom plate 21 is poured out, and the retractable filter baffle 17 is adjusted to an extended state, and the fan blows air in the reverse direction with high power, so as to blow out foreign matter blocking the filter baffle 17 and the annular filter element 19, and disassembly can be avoided;

[0029] Among them, an annular filter element 19 is installed inside the filter baffle 17, and a bottom plate 21 is fixedly installed at the bottom end of the wind cover 1 until the gap between the baffle blades 22 is reduced to a suitable state. The smaller the gap between the multiple baffle blades 22 inside the filter baffle 17, the greater the wind resistance and the better the filtering effect. The gap can be flexibly adjusted according to needs;

[0030] A sealing ring is installed at the top of the bottom plate 21, and the material of the annular filter element 19 can be sponge, non-woven fabric, HEPA, etc., and different filter elements can be selected and adjusted according to the filtered material. An air outlet 14 is fixedly installed on the top of the cyclone chamber 12, and a square hole 15 is opened on the top of the plug plate 23. The dust chamber 11 and the cyclone chamber 12 are separated by the arc-shaped plug plate 23, and the connection between the dust chamber 11 and the cyclone chamber 12 is achieved through the square hole 15. The other side of the air outlet 14 extends to the middle of the cyclone chamber 12, and an air inlet 13 is fixedly installed on the surface of the cyclone chamber 12. The installation direction of the air inlet 13 is horizontal and tangent to the surface of the cyclone chamber 12, and a coarse mesh filter is arranged inside the air inlet 13.

[0031] Working principle:

[0032] In the first step, after the gas enters the cyclone chamber 12 from the air inlet 13, it will make a counterclockwise spiral motion inside the cyclone chamber 12 when viewed from above, and then be discharged from the air outlet 14. During the spiral motion, large debris and dust will gradually descend along the inner wall of the cyclone chamber 12 until they enter under the partition plate 16. After reaching under the partition plate 16, the wind force suddenly drops, and the debris and dust will quickly sink to the bottom. This is the first level of filtration, while the fine debris and dust will be blown to the top of the circumference of the cyclone chamber 12 by the cyclone due to their light weight, and then enter the dust chamber 11 along the cylindrical wall through the square hole 15 at the top. In the dust chamber 11, the wind speed slows down rapidly, and the dust gradually sinks to the bottom under the action of gravity, and the second level of filtration is performed.

[0033] In the second step, due to the existence of turbulence, a very small number of foreign objects will avoid the first and second filtrations and become slippery. As the airflow gradually approaches the cylindrical center of the dust chamber 11, the rotation radius will gradually become smaller and the rotation speed will gradually become faster. When the airflow passes through the filter baffle 17 in the closed state, the airflow will turn quickly because the cross-section of the filter baffle 17 is perpendicular to the spiral wind direction. At this time, the light pure air will smoothly turn and continue to flow to the air outlet 14 due to its small inertia, while the heavier dust will hit the filter baffle 17 under the action of inertia and be blocked back into the spiral air duct. This is the third filtration. The airflow passes through the filter baffle. After 17, it will pass through the annular filter element 19 to filter out extremely light and small solid particles. This is the fourth filtration. After the fresh air filtration device has been running for a period of time, the filter baffle 17 of the third filtration and the annular filter element 19 of the fourth filtration will gradually be blocked, resulting in a drop in wind pressure. When it is detected that the wind pressure has dropped to a threshold, the self-cleaning mode is turned on, the bottom plate 21 is opened, the foreign matter trapped on the top of the bottom plate 21 is poured out, and the retractable filter baffle 17 is adjusted to an extended state. The fan blows in reverse at high power to blow out the foreign matter that blocks the filter baffle 17 and the annular filter element 19, thereby avoiding disassembly, thereby achieving a self-cleaning and maintenance-free effect.

[0034] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A fresh air filter device with self-cleaning function, characterized in that: The fresh air filtering device comprises a wind hood (1), wherein a dust chamber (11) is arranged inside the wind hood (1), wherein a cyclone chamber (12) is arranged inside the wind hood (1) on one side of the dust chamber (11), wherein a filter baffle (17) is movably installed inside the cyclone chamber (12), wherein a plurality of baffle blades (22) are arranged on the surface of the filter baffle (17), wherein a partition plate (16) is fixedly installed at the bottom end of the filter baffle (17), and wherein a plug plate (23) is fixedly installed inside the wind hood (1); The filter baffle (17) has two states, an extended state and a retracted state. The cyclone chamber (12) is cylindrical. The airflow performs a spiral motion in the cyclone chamber (12). The dust separation chamber (11) and the cyclone chamber (12) are separated by a plug plate (23). The cyclone chamber (12) is a complete cylindrical shape. One side of the dust separation chamber (11) is inwardly concave. The dust separation chamber (11) and the cyclone chamber (12) intersect with each other.

2. A fresh air filter device with self-cleaning function as claimed in claim 1, characterized in that: The outer surface and the inner surface of each baffle blade (22) are both arc-shaped, and the sharp corner of the arc points in the counterclockwise direction during installation.

3. A fresh air filter device with self-cleaning function as claimed in claim 1, characterized in that: The partition plate (16) is installed at the bottom of the filter baffle (17) to separate the cyclone chamber (12) into two parts, an upper part and a lower part.

4. A fresh air filter device with self-cleaning function as claimed in claim 1, characterized in that: An annular filter element (19) is installed inside the filter baffle (17), and a bottom plate (21) is fixedly installed at the bottom end of the wind cover (1); A sealing ring is installed at the top of the bottom plate (21), and the annular filter element (19) is made of sponge, non-woven fabric, or HEPA. Different filter elements are selected and adjusted according to the substance to be filtered.

5. The fresh air filtering device with self-cleaning function according to claim 1, characterized in that: An air outlet (14) is fixedly mounted on the top of the cyclone chamber (12), and a square hole (15) is formed on the top of the plug plate (23); The dust separation chamber (11) and the cyclone chamber (12) are separated by an arc-shaped plug plate (23), and the dust separation chamber (11) and the cyclone chamber (12) are connected by a square hole (15), and the square hole (15) is tangent to the cylindrical wall.

6. A fresh air filter device with self-cleaning function as claimed in claim 1, characterized in that: An air inlet (13) is fixedly mounted on the surface of the cyclone chamber (12); The air inlet (13) is installed in a horizontal direction and is tangent to the surface of the cyclone chamber (12), and a coarse mesh filter is provided inside the air inlet (13).

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