A dirt removal device for a fan cover, a fan and a method for removing dirt from a fan cover

Abstract

The application relates to a dirt removing device for a fan air inlet mesh cover, a fan and a fan mesh cover dirt removing method, the dirt removing device comprising rotating blades, a blade base and a rotating shaft, the rotating blades being fixedly connected with the blade base; the blade base is fixedly connected with the rotating shaft, the rotating blades are in an arc shape as a whole, the inner arc side of the arc-shaped rotating blades is a wind receiving surface, and the wind receiving surface is used for driving the rotating blades to rotate under the condition that the fan is started. The dirt removing device for the fan air inlet mesh cover can be directly installed on the fan mesh cover, is convenient and fast, can achieve the dirt removing effect after being installed on the fan mesh cover, and is low in cost.

Description

Technical Field

[0001] This invention relates to the field of fans, and particularly to a decontamination device for a fan inlet screen, a novel fan, and a method for decontamination of a fan inlet screen. Background Technology

[0002] Every spring, poplar and willow catkins fill the air. In rail transit ventilation equipment, large amounts of these catkins, along with large particles of debris, accumulate on the outer surface of the fan inlet screen, causing airflow blockage, reducing air volume, and consequently affecting heat dissipation of the equipment inside the train. To avoid disrupting normal train operation, the large particles of poplar and willow catkins and leaves adhering to the fan inlet screen need to be cleaned promptly. Currently, there is no suitable and convenient decontamination solution; the existing method is manual cleaning at regular intervals, which is time-consuming and labor-intensive, and requires stopping the train for cleaning, thus affecting train operation. Therefore, a decontamination removal device for the fan inlet screen is necessary for rail transit ventilation equipment. Summary of the Invention

[0003] In view of this, the present invention proposes a decontamination device for a fan inlet screen, a novel fan, and a decontamination method for a fan inlet screen, aiming to solve the problems existing in the prior art.

[0004] Specifically, a cleaning device for a fan inlet screen includes a rotating blade, a blade base, and a rotating shaft. The rotating blade is fixedly connected to the blade base; the blade base is fixedly connected to the rotating shaft. The rotating blade is generally arc-shaped, and the inner arc side of the arc-shaped rotating blade is the wind-receiving surface. The wind-receiving surface is used to drive the rotating blade to rotate when the fan is started.

[0005] Based on the above scheme, the wind-receiving surface is tilted as a whole, and the side of the wind-receiving surface near the net extends and tilts in the opposite direction to the arc-shaped protrusion of the rotating blade.

[0006] Based on the above scheme, the wind-receiving surface of the rotating blade is an arc surface, a spherical surface, or an ellipsoidal surface.

[0007] Based on the above scheme, the number of rotating blades is at least one, and the rotating blades are symmetrical about the central axis of the rotating shaft.

[0008] Based on the above scheme, several shovel teeth are provided at the bottom of the outer arc side of the rotating blade along the length direction of the rotating blade.

[0009] Based on the above scheme, a brush for cleaning the mesh cover is provided at the bottom of the rotating blade;

[0010] Based on the above scheme, the bottom surface of the rotating blade is provided with a groove for fixing the brush.

[0011] Based on the above solution, a fixing base for use with the rotating shaft is also included, the bottom of which is used to connect the fan inlet screen.

[0012] Based on the above scheme, the blade base is a cap shape with one end closed and the other end open. The center of the inner wall of the closed end extends towards the open end to form a pivot. The open end extends into the inner and outer walls to form a short first wall and a long second wall, respectively.

[0013] The bottom sidewall of the fixing seat extends outward in the horizontal direction, then flips upward in the vertical direction and continues to extend to form an insertion wall;

[0014] A first insertion groove for inserting the insertion wall is formed between the first wall and the second wall; a second insertion groove for inserting the first wall is formed between the insertion wall and the outer wall of the fixing seat.

[0015] A novel fan has a cleaning device for the fan inlet screen provided on the outside of the fan inlet screen; the bottom surface of the rotating blades is close to the screen but does not contact it.

[0016] A method for cleaning a fan inlet screen is provided, specifically by installing the aforementioned cleaning device for the fan inlet screen on the outside of the fan inlet screen. After the fan is turned on, the air entering the fan drives the rotating blades of the cleaning device to rotate, and the rotating blades clean the dirt from the surface of the screen.

[0017] The cleaning device for the fan inlet screen of this invention can be directly installed on the fan screen, which is convenient and quick. After being installed on the fan screen, the rotating blades are designed so that when the fan is on, the air entering the fan drives the rotating blades to rotate, thereby removing dirt from the screen. The fan and the cleaning device operate in sync: when the fan is on, the rotating blades of the cleaning device for the fan inlet screen begin to rotate; when the fan is off, the rotating blades of the cleaning device for the fan inlet screen gradually stop rotating. The added components to the fan have a low failure rate and do not require external power, ensuring high reliability of the new fan. The cleaning effect can be achieved simply by adding the cleaning device to the original fan inlet screen, resulting in low cost. The design of the rotating blades, the shovel teeth, and the brushes allows for more efficient removal of poplar and willow catkins and other attached substances. Attached Figure Description

[0018] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention.

[0019] Figure 1This is a schematic diagram of the structure of the decontamination device of the present invention;

[0020] Figure 2 for Figure 1 Schematic diagram of the DD-direction cross-sectional structure of the rotating blade in the middle;

[0021] Figure 3 This is a schematic diagram of the structure of the blade and blade base described in Example 1;

[0022] Figure 4 for Figure 3 Enlarged diagram of the R position in the middle;

[0023] Figure 5 This is a schematic diagram of the structure of the cleaning device of the present invention with a mesh cover;

[0024] Figure 6 A schematic diagram showing that the wind-receiving surface of the rotating blades is an arc surface;

[0025] Figure 7 A schematic diagram showing that the wind-receiving surface of the rotating blades is spherical;

[0026] Figure 8 A schematic diagram showing that the wind-receiving surface of the rotating blades is an ellipsoid;

[0027] Figure 9 This is a schematic diagram of the cleaning device of the present invention (excluding rotating blades).

[0028] Figure 10 This is a schematic diagram of the blade base of the dirt removal device of the present invention;

[0029] Figure 11 This is a schematic diagram of the structure of the fixing base of the dirt removal device of the present invention. Detailed Implementation

[0030] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the invention to those skilled in the art. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] Example 1

[0032] like Figure 1-4As shown, a cleaning device for a fan inlet screen includes a rotating blade 1, a blade base 2, and a rotating shaft 8. The rotating blade 1 is fixedly connected to the blade base 2; the blade base 2 is fixedly connected to the rotating shaft 8. The fixed connection can be achieved by welding, bonding, or integral molding.

[0033] Specifically, the rotating blade 1 of the dirt removal device used in the fan inlet screen is generally arc-shaped and has a certain thickness. The inner arc side of the arc-shaped rotating blade 1 is the air-receiving surface A (e.g., Figure 2 As shown), the wind-receiving surface A is used to drive the rotating blade 1 to rotate under windy conditions (windy conditions refer to the condition where the fan starts and air enters the fan from the outside). Specifically, the wind-receiving surface is inclined as a whole, and the side of the wind-receiving surface near the screen is inclined in the opposite direction to the arcuate protrusion of the rotating blade 1 (so that...). Figures 5-8 For example, overall tilt refers to the fact that the wind-receiving surface A is not perpendicular or parallel to any of the rotation planes formed when the rotating blade 1 rotates, that is... Figure 6-8 The line connecting the upper and lower ends of the wind-receiving surface A forms a certain angle with the plane of rotation formed by the bottom edge of the rotating blade 1 when it rotates.

[0034] In rail transit fan equipment, a large amount of poplar and willow catkins, as well as large particles of garbage such as leaves and paper scraps, will accumulate on the outer surface of the fan inlet screen, causing air intake blockage, reducing the fan's air intake volume, and thus affecting the heat dissipation of the equipment inside the vehicle. After installing the aforementioned cleaning device on the outside of the fan screen, when the fan is turned on, the air outside the fan will be drawn into the fan. Before entering the fan, the flowing air (wind) first passes through the wind-receiving surface A on the inner arc side of the arc-shaped rotating blade 1. At this time, driven by the wind, the rotating blade 1 will rotate. When rotating, the dirt on the fan screen will be removed by the rotating blade 1. The arc design of the rotating blade 1 is more conducive to the dirt being thrown out.

[0035] In this invention, in order to make the air entering the fan better drive the rotating blades 1, the air-receiving surface A can be an arc surface (e.g., Figure 6 As shown), spherical surface (as shown) Figure 7 As shown, the dashed lines are only to indicate that the windward surface is a sphere or an ellipsoid (e.g., ...). Figure 8 As shown, the dashed line is only to indicate that the windward surface is an ellipsoid.

[0036] The number of rotating blades 1 in the cleaning device used for the fan inlet screen is at least one, preferably two, but can also be three or more. These multiple rotating blades 1 rotate symmetrically around the central axis of the rotating shaft 8. When there is one rotating blade 1, it connects to the outer wall of the blade base 2 at any angle, and after rotating 360 degrees, it coincides with itself. When there are two rotating blades 1, after the cleaning device rotates 180 degrees, one rotating blade 1 coincides with the other; and so on. At the same time, the number of rotating blades 1 should not be excessive. Too many blades will not only fail to improve the cleaning effect but will also affect the fan's air intake efficiency and the rotation of the cleaning device.

[0037] like Figures 2-4 As shown, a plurality of shovel teeth 1-1 are provided along the length direction at the bottom of the outer arc side A' of the rotating blade 1. The shovel teeth 1-1 form a tip on the side away from the rotating blade 1, for example... Figure 4 The shovel tooth 1-1 shown is a square pyramid with its quadrangular base fixed to the outer arc side A' of the rotating blade 1. One of its triangular sides is on the same plane as the base of the rotating blade 1. When the rotating blade 1 rotates, larger particles of garbage such as leaves and paper scraps attached to the mesh cover move along the upper surface of the shovel tooth 1-1, passing through the cone apex and cone bottom of the shovel tooth 1-1 in sequence, and finally detaching from the rotating blade 1, thereby efficiently removing larger particles of garbage such as leaves and paper scraps.

[0038] like Figure 2 As shown, a brush 1-2 is provided on the bottom surface of the rotating blade 1. The brush 1-2 is used to clean dirt in the area passed by the bottom surface of the rotating blade 1. For easy installation of the brush 1-2, a groove 1-3, such as a U-shaped groove or a V-shaped groove, is provided on the bottom surface of the rotating blade 1 for installing the brush 1-2. During rotation, the dirt cleaned by the brush 1-2 is then removed by the rotating blade 1 that subsequently rotates to that position.

[0039] like Figure 9 As shown, the cleaning device for the fan inlet screen of the present invention also includes a fixing base 5 that cooperates with the rotating shaft 8. The bottom of the fixing base 5 is used to connect the fan inlet screen, and the upper part of the fixing base 5 is provided with a bearing 4 that cooperates with the rotating shaft 8. There are many ways to connect the fixing base 5 and the screen. As a specific connection method, a mounting post 7 is provided at the bottom of the fixing base 5. The mounting post 7 passes through the inlet screen, and the fixing base 5 is fixed to the screen by a fixing clamp 6 on the other side of the screen.

[0040] like Figure 9 and 10 As shown, the blade base 2 is a cap-shaped structure with one end closed and the other end open. The center of the inner wall of the closed end extends toward the open end to form a rotating shaft 8. The open end extends along the inner and outer walls to form a short first wall 2-1 and a long second wall 2-2, respectively.

[0041] like Figure 9 and 11 As shown, the bottom sidewall of the fixing base 5 extends outward in the horizontal direction, then flips upward in the vertical direction and continues to extend to form the insertion wall 5-1; (both horizontal and upward directions are...) Figure 11 (Taking the direction as an example)

[0042] A first insertion groove 2-3 for inserting the insertion wall 5-1 is formed between the first wall 2-1 and the second wall 2-2; a second insertion groove 5-2 for inserting the first wall 2-1 is formed between the insertion wall 5-1 and the outer wall of the fixing seat 5.

[0043] This design, once installed, prevents contaminants from entering the blade base 2 and contaminating components such as the bearing 4 during use.

[0044] Preferably, the outer side of the closed end of the blade base 2 is a convex spherical or near-spherical surface, which can reduce wind resistance.

[0045] Example 2

[0046] like Figure 5 As shown, a novel fan has a cleaning device for the fan inlet screen 3 as described in Example 1 installed on the outside of the fan inlet screen 3.

[0047] Specifically, the bottom surface of the rotating blade 1 of the cleaning device is close to the screen 3 but does not contact the screen 3. The purpose of this arrangement is that the smaller the distance between the rotating blade 1 and the screen 3, the smaller the amount of garbage attached to the screen 3 is removed, and the better the cleaning effect. The fact that the rotating blade 1 does not contact the screen 3 can reduce resistance, and the smaller the resistance, the faster the rotation speed.

[0048] In this invention, the airflow at the fan inlet drives the rotating blades 1 of the cleaning device used for the fan inlet screen to rotate. The two operate in the same way. When the fan is turned on, the airflow entering the fan will drive the rotating blades 1 to start rotating. When the fan is turned off, the airflow entering the fan disappears, and the rotating blades 1 will slowly stop rotating. The operating state of the fan determines the operating state of the cleaning device.

[0049] The other components of the fan are all standard fan components and will not be described in detail here.

[0050] Example 3

[0051] A method for cleaning a fan inlet screen cover includes a cleaning device for the fan inlet screen cover as described in Example 1, which is installed on the outside of the fan inlet screen cover. Specifically, after the fan is turned on, the air entering the fan drives the rotating blades 1 of the cleaning device to rotate, and the rotating blades 1 clean the dirt on the surface of the screen cover 3.

[0052] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A fan, characterized in that, A cleaning device for the fan inlet screen is installed on the outside of the fan inlet screen. The cleaning device for the fan inlet screen includes a rotating blade (1), a blade base (2), and a rotating shaft (8). The rotating blade (1) is fixedly connected to the blade base (2); the blade base (2) is fixedly connected to the rotating shaft (8). The rotating blade (1) is arc-shaped, and the inner arc side of the arc-shaped rotating blade (1) is the wind-receiving surface. The wind-receiving surface is used to drive the rotating blade (1) of the cleaning device to rotate by the wind entering the fan after the fan is turned on. The bottom surface of the rotating blade (1) is close to the mesh cover (3) but does not contact the mesh cover (3); The bottom of the outer arc side of the rotating blade (1) is provided with a number of shovel teeth (1-1) along the length direction of the rotating blade (1). The shovel teeth (1-1) form a tip on the side away from the rotating blade (1); The shape of the shovel tooth (1-1) is a quadrangular pyramid, and its quadrilateral base is fixed on the outer arc side of the rotating blade (1), and one of the triangular side faces is in the same plane as the base of the rotating blade (1); The bottom of the rotating blade (1) is provided with a brush (1-2) for cleaning the mesh cover, and the bottom surface of the rotating blade (1) is provided with a groove (1-3) for fixing the brush (1-2).

2. The fan according to claim 1, characterized in that, The wind-receiving surface is tilted as a whole, and the side of the wind-receiving surface near the net extends and tilts in the opposite direction to the arc-shaped protrusion of the rotating blade (1).

3. The fan according to claim 1, characterized in that, The wind-receiving surface of the rotating blade (1) is an arc surface.

4. The fan according to claim 1, characterized in that, The number of the rotating blades (1) is at least one, and the rotating blades (1) are rotationally symmetrical about the central axis of the rotating shaft (8).

5. The fan according to claim 1, characterized in that, It also includes a mounting base (5) used in conjunction with the rotating shaft (8), the bottom of which is used to connect the fan inlet screen.

6. The fan according to claim 5, characterized in that, The blade base (2) is a cap-shaped structure with one end closed and the other end open. The center of the inner wall of the closed end extends toward the open end to form a rotating shaft (8). The open end extends along the inner and outer walls to form a short first wall (2-1) and a long second wall (2-2), respectively. The bottom sidewall of the fixing seat (5) extends outward in the horizontal direction, then flips up in the vertical direction and continues to extend to form an insertion wall (5-1). A first insertion groove (2-3) for inserting the insertion wall (5-1) is formed between the first wall (2-1) and the second wall (2-2); a second insertion groove (5-2) for inserting the first wall (2-1) is formed between the insertion wall (5-1) and the outer wall of the fixing seat (5).

7. A method for removing contaminants from the air inlet screen of a blower, characterized in that, A cleaning device for the fan inlet screen is provided on the outside of the fan inlet screen. After the fan is turned on, the air entering the fan drives the rotating blades (1) of the cleaning device to rotate. The rotating blades (1) clean the dirt on the surface of the screen (3). The cleaning device for the fan inlet screen includes rotating blades (1), blade base (2) and rotating shaft (8). The rotating blades (1) are fixedly connected to the blade base (2). The blade base (2) is fixedly connected to the rotating shaft (8). The rotating blades (1) are arc-shaped. The inner arc side of the arc-shaped rotating blades (1) is the wind-receiving surface. The wind-receiving surface is used to drive the rotating blades (1) to rotate when the fan is started. The bottom of the outer arc side of the rotating blade (1) is provided with a number of shovel teeth (1-1) along the length direction of the rotating blade (1). The shovel teeth (1-1) form a tip on the side away from the rotating blade (1); The shape of the shovel tooth (1-1) is a quadrangular pyramid, and its quadrilateral base is fixed on the outer arc side of the rotating blade (1), and one of the triangular side faces is in the same plane as the base of the rotating blade (1); The bottom of the rotating blade (1) is provided with a brush (1-2) for cleaning the mesh cover, and the bottom surface of the rotating blade (1) is provided with a groove (1-3) for fixing the brush (1-2).

8. The method according to claim 7, characterized in that, The wind-receiving surface is tilted as a whole, and the side of the wind-receiving surface near the net extends and tilts in the opposite direction to the arc-shaped protrusion of the rotating blade (1).

9. The method according to claim 7, characterized in that, The wind-receiving surface of the rotating blade (1) is an arc surface.

10. The method according to claim 7, characterized in that, The number of the rotating blades (1) is at least one, and the rotating blades (1) are rotationally symmetrical about the central axis of the rotating shaft (8).

11. The method according to claim 7, characterized in that, It also includes a mounting base (5) used in conjunction with the rotating shaft (8), the bottom of which is used to connect the fan inlet screen.

12. The method according to claim 11, characterized in that, The blade base (2) is a cap-shaped structure with one end closed and the other end open. The center of the inner wall of the closed end extends toward the open end to form a rotating shaft (8). The open end extends along the inner and outer walls to form a short first wall (2-1) and a long second wall (2-2), respectively. The bottom sidewall of the fixing seat (5) extends outward in the horizontal direction, then flips up in the vertical direction and continues to extend to form an insertion wall (5-1). A first insertion groove (2-3) for inserting the insertion wall (5-1) is formed between the first wall (2-1) and the second wall (2-2); a second insertion groove (5-2) for inserting the first wall (2-1) is formed between the insertion wall (5-1) and the outer wall of the fixing seat (5).

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