Fan with centrifugal wind wheel

Abstract

The fan with the centrifugal wind wheel comprises a turbine shell, an impeller and a motor, the motor is located on one side of the turbine shell, a wind cavity is formed in the turbine shell, and the impeller is located in the wind cavity and connected with a rotating shaft of the motor. The impeller comprises an air guide cover, a rear cover, an annular reinforcing plate and a plurality of blades, the blades are evenly distributed and perpendicular to the rear cover, the bottom edges of the blades are connected with the rear cover, air guide edges and top edges are arranged on the upper portions of the blades, the air guide cover is connected with the top edges of the blades, and an air wheel air inlet is defined by the air inlet edges of the air guide cover. A plurality of wind wheel air outlets are separated by a plurality of blades between the air outlet edge of the air guide cover and the outer edge of the rear cover; the upper part of the blade is provided with a wind guide edge and a top edge, so that the wind resistance of the blade is reduced and the wind resistance of the blade is improved; and the impeller is provided with the annular reinforcing plate, so that the rigidity of the blades is enhanced, and the wind resistance is stronger.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a fan with a centrifugal wind wheel. Background Art

[0002] A centrifugal fan is a machine that uses input mechanical energy to increase gas pressure and discharge the gas. It is a driven fluid machine. Centrifugal fans are widely used for ventilation, dust removal, and cooling in factories, mines, tunnels, cooling towers, vehicles, ships, and buildings; ventilation and draft control in boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; grain drying and conveying; wind tunnel air supply and the inflation and propulsion of hovercraft. Prior art, such as Chinese utility model patent publication number CN219549154U, discloses a centrifugal fan comprising a centrifugal fan body and an outlet duct mounted on top of the centrifugal fan body. The outlet duct is sealed and movably connected to the centrifugal fan body. A motor is mounted on one side of the centrifugal fan body, and a transmission mechanism is connected between the motor and the outlet duct. The motor drives the outlet duct to rotate via the transmission mechanism. However, this fan suffers from issues such as insufficient airflow and insufficient wind resistance of the blades, thus requiring improvement. Utility Model Content

[0003] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a fan with a centrifugal wind wheel.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A fan with a centrifugal wind wheel includes a turbine housing, an impeller and a motor. The motor is located on one side of the turbine housing. A wind cavity is provided in the turbine housing. The impeller is located in the wind cavity and is connected to the rotating shaft of the motor. The impeller includes an air guide cover, a rear cover, an annular reinforcement plate and a plurality of blades. The blades are evenly distributed. The blades and the rear cover are perpendicular to each other and the bottom edges of the blades are connected to the rear cover. The upper parts of the blades are provided with air guide edges and top edges. The air guide cover is connected to the top edges of multiple blades. The air inlet edge of the air guide cover forms a wind wheel air inlet. The air outlet edge of the air guide cover and the outer edge of the rear cover are separated by multiple blades to form multiple wind wheel air outlets.

[0006] Furthermore, the wind guide edge and the top edge are adjacently arranged and a peak is formed at the connection between the two. The peak is connected to the wind wheel air inlet, and the wind guide edge is inclined downward from the peak and extends to the side edge of the blade.

[0007] Furthermore, the wind guide edge is located on a side close to the impeller axis, and the wind guide edge is tilted downward by 35°-50° from the peak point.

[0008] Furthermore, a wind-breaking slope is provided on the blade adjacent to the wind-guiding edge. One side of the wind-breaking slope is connected to the wind-guiding edge, and the other side is inclined outward and extends to the end face of the blade, forming a "blade"-shaped wind-breaking slope.

[0009] Furthermore, the air guide cover is ring-shaped and is provided with an arc-shaped air guide surface, one end of the air guide surface is connected to the air inlet edge, the other end is connected to the air outlet edge, and the outer arc line is connected to the top edge.

[0010] Furthermore, the blades are evenly distributed in a ring shape, the annular reinforcement plates pass through the waist of the blades in sequence, and the width of the annular reinforcement plates is smaller than the width of the blades.

[0011] Furthermore, the wind inlet ends of the blades are all inclined clockwise along the radial direction.

[0012] Furthermore, the wind inlet ends of the blades are all inclined in the clockwise direction along the radial direction at an angle of 40°-60°.

[0013] Furthermore, a casing air inlet is provided on the turbine casing at a position corresponding to the wind wheel air inlet, and a casing air outlet is provided on the top thereof, which is connected to the casing air inlet, and the impeller is connected to the outside through the casing air inlet and the casing air outlet;

[0014] Furthermore, a reinforcement ring is provided on the turbine housing at a position corresponding to the air inlet of the housing, and a protective net can be installed on the reinforcement ring.

[0015] The utility model has the following beneficial effects:

[0016] The upper part of the blade is provided with a wind guide edge and a top edge to reduce the wind resistance of the blade and improve the wind resistance of the blade.

[0017] The impeller is provided with an air guide cover which is in an arc shape, which reduces the resistance of the airflow when it enters and helps to guide the airflow to the blades.

[0018] The impeller is provided with an annular reinforcement plate to enhance the rigidity of the blades and make them more wind-resistant. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front perspective view of the overall structure of an embodiment of the utility model.

[0020] Figure 2 This is a three-dimensional back view of the overall structure of an embodiment of the present utility model.

[0021] Figure 3 This is an exploded view of the overall structure of an embodiment of the present utility model.

[0022] Figure 4 This is a schematic structural diagram of the impeller according to an embodiment of the present utility model.

[0023] Figure 5 For the embodiment of the utility model Figure 4 Enlarged view of point A.

[0024] Figure 6 This is a side sectional view of the impeller according to an embodiment of the present invention.

[0025] Reference numerals in the figures:

[0026] Turbine housing 1, air cavity 11, housing air inlet 12, housing air outlet 13, motor bracket 14, side plate 141, support plate 142, reinforcement ring 15;

[0027] Impeller 2, wind guide cover 21, wind wheel air inlet 211, wind wheel air outlet 212, wind guide arc surface 213, rear cover 22, blades 23, wind guide edge 231, top edge 232, bottom edge 233, peak 234, wind-breaking slope 235, annular reinforcement plate 24;

[0028] Motor 3. DETAILED DESCRIPTION

[0029] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0032] like Figures 1-6As shown, a fan with a centrifugal wind wheel is mainly used in dusty scenes such as mines and material fields. The fan drives the air flow to quickly discharge the dust outward. It includes a turbine housing 1, an impeller 2 and a motor 3. The motor 3 is installed on one side of the turbine housing 1. The turbine housing 1 is provided with a housing air inlet 12 and a housing air outlet 13, and is provided with an air cavity 11 connected to the two. The impeller 2 is installed in the air cavity 11. Specifically, the housing air inlet 12 is located on one side of the air cavity 11 opposite to the side where the motor 3 is installed, and the housing air outlet 13 is located at the top. Furthermore, a pipe can be connected to the housing air outlet 13 to guide the airflow to a specified direction or position. The air cavity 11 is circular and adapts to the shape of the impeller 2, and the circular inner wall can reduce the resistance of the airflow, so that the wind speed is faster and the wind force is greater. The rotating shaft of the motor 3 passes through the turbine housing 1 and is connected to the impeller 2 and drives it to rotate. Furthermore, a motor bracket 14 is provided on the side of the turbine housing 1 where the motor 3 is mounted. The motor bracket 14 includes a side plate 141 and a support plate 142 vertically connected between the two side plates 141. The side plates 141 and the support plate 142 are fixed by welding or integrally formed. The side of the side plate 141 and the support plate 142 close to the turbine housing 1 are welded and fixed to the turbine housing 1, making the connection between the two more rigid, thereby making the supporting force of the motor bracket 14 stronger and the motor 3 more firmly mounted on the motor bracket 14. Furthermore, a base is provided at the bottom of the turbine housing 1 to enable the fan to stand upright on the ground or a flat surface.

[0033] like Figure 3 、 Figure 4 As shown, the impeller 2 includes an air guide cover 21, a rear cover 22, an annular reinforcement plate 24 and a number of evenly distributed blades 23. The blades 23 are located between the air guide cover 21 and the rear cover 22, and the outer edges of the upper and lower ends are connected to the air guide cover 21 and the rear cover 22 respectively. The blades 23 are arranged in an array along the circumferential direction of the rear cover 22 and are perpendicular to the rear cover 22. When perpendicular, their wind resistance is the strongest. Specifically, the connection method is welding. The air guide cover 21 is ring-shaped, and its inner ring is the wind inlet edge. As shown Figure 6 As shown, the air inlet edge of the air guide cover 21 forms a rotor air inlet 211. Multiple blades 23 separate the air outlet edge of the air guide cover 21 and the outer edge of the rear cover 22 to form multiple rotor air outlets 212. Specifically, the rotor air inlet 211 corresponds to the position of the housing air inlet 12. In other words, the impeller 2 draws air from the inner ring of the air guide cover 21 and discharges air from the spaces between the blades 23.

[0034] In the present invention, the more blades 23 there are, the greater the wind pressure is, and the longer the blowing distance is. Conversely, the smaller the wind pressure is, the shorter the blowing distance is. Preferably, the number of blades 23 is 10.

[0035] Further, such as Figure 4As shown, in order to reduce wind resistance during the rotation of the impeller 2 and improve the wind resistance of the blade 23, since a larger contact area with the wind flow results in greater wind resistance and lower wind resistance, a wind guide edge 231 and a top edge 232 are provided on the upper portion of the blade 23. The wind guide edge 231 and the top edge 232 are adjacently arranged. The wind guide edge 231 is located on the windward side of the blade 2 and is inclined at a certain angle. The top edge 232 is located on the windward side. The wind guide cover 21 is connected to the top edge 232 of each blade 23. Specifically, the connection between the wind guide edge 231 and the top edge 232 has a peak 234, which is connected to the wind rotor air inlet 211. The wind guide edge 231 tilts downward from the peak 234 and extends to the side edge of the blade 23. The inclined arrangement can reduce the contact area between the blade 23 and the wind, while allowing more wind to enter the impeller 2 and allowing the wind flow to flow smoothly along the surface of the blade 23, thereby reducing wind resistance and wind resistance.

[0036] Further, such as Figure 5 As shown, the wind guide edge 231 is located on the side close to the axis of the impeller 2. The wind guide edge 231 is tilted downward from the peak 234 by 35°-50°. In the present invention, the tilt angle of the wind guide edge 231 is preferably 45°. When the wind wheel 2 rotates, a large amount of air enters from the wind wheel air inlet 211 and forms an airflow as the wind wheel 2 rotates. The smaller the tilt angle of the wind guide edge 231, the greater the resistance to the airflow generated by the blades 23. In other words, the smaller the wind resistance of the blades 23, the more easily they are deformed by the wind. At the same time, due to the increased resistance to the airflow, the rotation speed of the impeller 2 is reduced, thereby affecting the exhaust efficiency. Conversely, when the tilt angle of the wind guide edge 231 is larger, the fanning area is smaller, and thus the wind resistance it encounters is smaller, but the wind force may be insufficient. Therefore, when the inclination angle of the wind-guiding edge 231 is 45°, its wind-guiding ability and wind-resistance ability are both the most appropriate, which can reduce the airflow resistance and better wind resistance while ensuring that the wind speed is faster and the airflow is blown farther.

[0037] Further, such as Figure 4 、 Figure 5 As shown, to further reduce wind resistance, a wind-breaking bevel 235 is provided on the blade 23 adjacent to the wind-guiding edge 231. One side of the wind-breaking bevel 235 is connected to the wind-guiding edge 231, while the other side extends outwardly and tilted to the end face of the blade 23, forming a "knife-edge"-shaped wind-breaking bevel 235. When the impeller 2 rotates at high speed, it can quickly "chop" the wind flow, reducing the resistance on the surface of the wind-guiding edge 231 and allowing the wind flow to quickly transition along the wind-breaking bevel 235 and enter the impeller 2.

[0038] Further, such as Figure 4 、 Figure 6As shown, the wind guide cover 21 is also designed to reduce wind resistance. The wind guide cover 21 is ring-shaped and has an arc-shaped wind guide surface 213. One end of the wind guide surface 213 is connected to the wind inlet edge, the other end is connected to the wind outlet edge, and its outer arc is connected to the top edge 232. After the wind enters the wind rotor air inlet 211, it quickly spreads along the wind guide surface 213 of the wind guide cover 21 toward the blades 23, thus playing a guiding role.

[0039] Furthermore, when the impeller 2 rotates at high speed, the airflow entering the impeller 2 moves along a centrifugal trajectory. The blades 23, which are arranged in a scattered pattern about the axis of the impeller 2, will create resistance to the airflow when the impeller 2 rotates. Therefore, the blades 23 are evenly distributed in a ring shape, with the air inlet ends of the blades 23 tilted clockwise along the radial direction, which is more consistent with the principles of airflow. This allows for smoother airflow and less resistance, thereby achieving a higher wind force from the fan. Specifically, the blades 23 are tilted clockwise along the radial direction at an angle of 40°-60°. In the present invention, the tilt angle is preferably 45°.

[0040] Furthermore, the blades 23 are arranged in a planar shape, which can stir up a larger air flow when rotating, and the air is discharged at a faster speed.

[0041] Furthermore, in order to strengthen the strength of the blade 23 and make it more wind-resistant, an annular reinforcing plate 24 is passed through the waist of the blade 23 in sequence, and each blade 23 is connected in sequence to form a whole, and the width of the annular reinforcing plate 24 is smaller than the width of the blade 23, thereby making the blade 23 more rigid.

[0042] Furthermore, a reinforcement ring 15 is provided at a corresponding position on the turbine housing 1. Installed outside the housing's air inlet 12, this ring provides collision protection, preventing the turbine housing 1 from denting during use or transportation, which could affect the proper functioning of the impeller 2 within. A protective net can be installed over the reinforcement ring 15 to prevent debris from entering and damaging the impeller 2. This also reduces airflow resistance and turbulence, improving the fan's efficiency. Specifically, the reinforcement ring 15 is secured with screws and can be removed when not in use.

[0043] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features. Any technical solutions that can be obtained by those skilled in the art based on the concept of the present invention through logical analysis, reasoning or limited experiments on the basis of existing technologies should be within the scope of protection determined by the claims.

Claims

1. A fan with a centrifugal wind wheel, comprising a turbine housing (1), an impeller (2) and a motor (3), wherein the motor (3) is located on one side of the turbine housing (1), and is characterized in that: A wind cavity (11) is provided in a turbine housing (1), and an impeller (2) is located in the wind cavity (11) and is connected to a rotating shaft of a motor (3); the impeller (2) comprises an air guide cover (21), a rear cover (22), an annular reinforcement plate (24), and a plurality of blades (23); the blades (23) are evenly distributed, the blades (23) and the rear cover (22) are perpendicular to each other, and the bottom edges (233) of the blades (23) are connected to the rear cover (22); an air guide edge (231) and a top edge (232) are provided on the upper portion of the blade (23); the air guide cover (21) is connected to the top edges (232) of the plurality of blades (23); the air inlet edge of the air guide cover (21) surrounds a wind wheel air inlet (211), and a plurality of wind wheel air outlets (212) are separated by the plurality of blades (23) between the air outlet edge of the air guide cover (21) and the outer edge of the rear cover (22).

2. The fan with a centrifugal wind wheel according to claim 1, characterized in that: The wind guide edge (231) and the top edge (232) are adjacently arranged, and a peak point (234) is provided at the connection between the two. The peak point (234) is connected to the wind wheel air inlet (211), and the wind guide edge (231) is inclined downward from the peak point (234) and extends to the side edge of the blade (23).

3. The fan with a centrifugal wind wheel according to claim 2, characterized in that: The wind guide edge (231) is located on a side close to the axis of the impeller (2), and the wind guide edge (231) is tilted horizontally downward by 35°-50° from the peak point (234).

4. The fan with a centrifugal wind wheel according to claim 1, characterized in that: A wind-breaking slope (235) is provided on the blade (23) at a position adjacent to the wind-guiding edge (231). One side of the wind-breaking slope (235) is connected to the wind-guiding edge (231), and the other side is inclined outward and extends to the end face of the blade (23), forming a "blade"-shaped wind-breaking slope (235).

5. The fan with a centrifugal wind wheel according to claim 1, characterized in that: The air guide cover (21) is ring-shaped and is provided with an arc-shaped air guide arc surface (213). One end of the air guide arc surface (213) is connected to the air inlet edge, the other end is connected to the air outlet edge, and the outer arc line is connected to the top edge (232).

6. The fan with a centrifugal wind wheel according to claim 1, characterized in that: The blades (23) are evenly distributed in a ring shape, and the annular reinforcement plates (24) sequentially penetrate the waist of the blades (23), and the width of the annular reinforcement plates (24) is smaller than the width of the blades (23).

7. The fan with a centrifugal wind wheel according to claim 1, characterized in that: The air inlet ends of the blades (23) are all inclined in a clockwise direction along the radial direction.

8. The fan with a centrifugal wind wheel according to claim 7, characterized in that: The air inlet ends of the blades (23) are all inclined in the clockwise direction along the radial direction at an angle of 40°-60°.

9. The fan with a centrifugal wind wheel according to claim 1, characterized in that: A casing air inlet (12) is provided on the turbine casing (1) at a position corresponding to the wind wheel air inlet (211), and a casing air outlet (13) communicating with the casing air inlet (12) is provided on the top. The impeller (2) is communicated with the outside through the casing air inlet (12) and the casing air outlet (13).

10. The fan with a centrifugal wind wheel according to claim 1, characterized in that: A reinforcement ring (15) is provided on the turbine housing (1) at a position corresponding to the housing air inlet (12), and a protective net is installed on the reinforcement ring (15).

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