Post type circular fan

Abstract

The utility model discloses a post type circular fan which comprises a machine shell, a motor, fan blades and a trundle assembly, the motor and the fan blades are arranged in the machine shell, the trundle assembly is arranged at the bottom of the machine shell, and the fan blades are connected with an output shaft of the motor; the fan blade comprises a fan blade flange and a plurality of blade bodies, the fan blade flange is connected with an output shaft of the motor, the blade bodies are evenly arranged on the periphery of the fan blade flange, the blade bodies are in a semi-symmetrical wing shape, and streamline tail wings are installed at the tail portions of the blade bodies. While the air volume is ensured and the environment temperature is effectively improved, the wind resistance is reduced, the working efficiency is improved, and wind howling and environment noise caused by the operation of the fan are reduced. In addition, when not in use, the device is convenient to move, and when in use, the device can be stably fixed on the ground and cannot move at will, so that the stability of operation safety is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a pedestal circular fan. Background Art

[0002] At present, most of the floor pedestal fans on the market have a rotation speed of about 1400 revolutions per minute, with high noise, strong wind force, poor body feeling, and inconvenient movement. As outdoor activities increase, the requirement for blowing comfort is getting higher and higher. It is necessary to develop an outdoor large fan that is movable, has a large air volume, but has relatively gentle wind force. Summary of the Utility Model

[0003] The main purpose of the utility model is to provide a large pedestal circular fan, aiming to reduce the wind whistling sound generated by the large pedestal circular fan during operation due to the large air volume and improve its portability.

[0004] To achieve the above purpose, the utility model provides a pedestal circular fan, including: a housing, a motor, a wind blade, and a caster assembly. The motor and the wind blade are arranged inside the housing. The caster assembly is arranged at the bottom of the housing. The wind blade is connected to the output shaft of the motor.

[0005] The wind blade includes a wind blade flange and a plurality of blades. The wind blade flange is connected to the output shaft of the motor. The plurality of blades are evenly arranged around the wind blade flange. The blades are semi-symmetrical airfoil-shaped, and a streamlined tail wing is installed at the tail of the blades.

[0006] A further technical solution of the utility model is that three inner holes are arranged at the tail of the blade, and three protruding parts are arranged on the tail wing and are matched with the three inner holes. The three protruding parts are arranged in the corresponding inner holes.

[0007] A further technical solution of the utility model is that the blade is made of aluminum alloy.

[0008] A further technical solution of the utility model is that the housing is circular, and flanges are arranged on both sides of the housing.

[0009] A further technical solution of the utility model is that there are two groups of caster assemblies. The caster assembly includes a support foot, a caster mounting plate, and a universal caster with a brake. The support foot is arranged at the bottom of the housing. The caster mounting plate is arranged at the bottom of the support foot. The universal caster with a brake is arranged at the bottom of the caster mounting plate.

[0010] The support foot is U-shaped, and a flange extends outward at the top of the support foot and is connected to the housing.

[0011] A further technical solution of the present utility model is that two parallel square tubes are welded inside the casing, a cross plate is welded between the two square tubes, two triangular reinforcing plates are arranged at the bottom of the cross plate, and the motor is arranged on the cross plate.

[0012] A further technical solution of the present utility model is that a control box is arranged on the casing. The control box includes a box cover, a bottom plate and a driving plate. A potentiometer knob is arranged on the box cover. The bottom plate is welded to the outer wall of the casing, the driving plate is installed on the bottom plate, and the bottom plate is bent into an arch shape by a steel plate.

[0013] A further technical solution of the present utility model is that it further includes a push handle. Bolt mounting holes are provided at both ends of the push handle and are fixed to the rolled edge of the casing by self-drilling screws.

[0014] A further technical solution of the present utility model is that it further includes a front net and a rear net arranged on the casing. The front net and the rear net are respectively fixed to the rolled edge of the casing by self-drilling screws; the front net and the rear net are spiral air nets that are slightly bulged in the middle.

[0015] A further technical solution of the present utility model is that the motor is a permanent magnet variable frequency inner rotor motor.

[0016] The beneficial effects of the post-type circular fan of the present utility model are as follows:

[0017] Through the above technical solutions, the present utility model can, while ensuring the air volume and effectively improving the environmental temperature, reduce the wind resistance, improve the work efficiency, and reduce the wind howling sound and environmental noise brought by the operation of the fan. In addition, the present utility model is convenient to move when not in use, and can be stably fixed on the ground and will not move randomly when in use, ensuring the stability of the operation safety. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0019] Figure 1 It is the front view of the preferred embodiment of the post-type circular fan of the present utility model;

[0020] Figure 2 It is the side view of the preferred embodiment of the post-type circular fan of the present utility model;

[0021] Figure 3It is a schematic exploded view of a preferred embodiment of the post-type circular fan of the present utility model;

[0022] Figure 4 It is a schematic structural view of the housing;

[0023] Figure 5 It is Figure 4 An enlarged schematic view of part A in

[0024] Figure 6 It is a schematic structural view of the motor;

[0025] Figure 7 It is a schematic structural view of the control box;

[0026] Figure 8 It is a schematic structural view of the caster assembly;

[0027] Figure 9 It is a schematic structural view of the fan blade composed of blades;

[0028] Figure 10 It is a schematic structural view of the blade;

[0029] Figure 11 It is a schematic partial structural view after the blade and the tail fin are assembled;

[0030] Figure 12 It is a schematic partial exploded view after the blade and the tail fin are assembled.

[0031] Explanation of the reference numerals in the drawings:

[0032] Housing 1: Hem 11; Square tube 12; Horizontal plate 13; Reinforcing plate 14;

[0033] Motor 2;

[0034] Control box 3: Box cover 31; Bottom plate 32; Potentiometer knob 33;

[0035] Pusher 4;

[0036] Rear net 5;

[0037] Caster assembly 6: Leg 61; Caster mounting plate 62; Universal caster with brake 63;

[0038] Fan blade 7: Flange 71; Blade 72; Tail fin 73; Protrusion 731;

[0039] Front net 8.

[0040] The realization, functional features and advantages of the purpose of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0042] The present utility model provides a post-type circular fan. As Figures 1 to 12 shown, a preferred embodiment of the post-type circular fan of the present utility model includes a housing 1, a motor 2, a wind blade 7, and a caster assembly 6. The motor 2 and the wind blade 7 are disposed inside the housing 1, the caster assembly 6 is disposed at the bottom of the housing 1, and the wind blade 7 is connected to the output shaft of the motor 2.

[0043] The wind blade 7 includes a wind blade flange 71 and a plurality of blades 72. The wind blade flange 71 is connected to the output shaft of the motor 2, and the plurality of blades 72 are evenly arranged around the wind blade flange 71.

[0044] To ensure the air volume, generate sufficient air circulation, and effectively improve the environmental temperature, in this embodiment, the diameter of the fan blade formed by the plurality of blades 72 can reach 1.5 meters. Therefore, in this embodiment, the blade 72 is designed as a semi-symmetric airfoil shape. The semi-symmetric airfoil-shaped blade 72 has low wind resistance and high efficiency, and can effectively reduce the noise generated during operation while ensuring a large air volume of the fan.

[0045] A streamlined tail wing 73 is installed at the tail of the blade 72, which can effectively reduce the wind whistling sound when the wind blade 7 rotates. Three inner holes are provided at the tail of the blade 72, and three protruding portions 731 are provided on the tail wing 73 and are disposed in the corresponding inner holes.

[0046] In this embodiment, the flange 71 and the blade 72 can be made of aluminum alloy material. Making the flange 71 and the blade 72 of aluminum alloy material can not only reduce the weight, but also have high strength and improve the service life. The tail wing 73 is blow-molded from PE plastic.

[0047] In this embodiment, the housing 1 is circular, and curling edges 11 are provided on both sides of the housing 1, which can effectively increase the strength of the housing 1.

[0048] In this embodiment, there are two groups of the caster assemblies 6, which are respectively disposed at the front end and the rear end of the housing 1.

[0049] The caster assembly 6 includes a support leg 61, a caster mounting plate 62, and a universal caster with brake 63. The support leg 61 is provided at the bottom of the housing 1, the caster mounting plate 62 is provided at the bottom of the support leg 61, and the universal caster with brake 63 is provided at the bottom of the caster mounting plate 62.

[0050] The support leg 61 is U-shaped, and a flange is formed by the outer extension of the top of the support leg 61, and the flange is connected to the housing 1.

[0051] Specifically, in this embodiment, each caster assembly 6 is respectively provided with two of the universal casters with brake 63. In this embodiment, the four universal casters with brake 63 can ensure that the fan is convenient to move, and can be firmly fixed on the ground by the braking function during operation without moving randomly, ensuring safe and stable operation.

[0052] In this embodiment, two parallel square tubes 12 are welded inside the housing 1. A cross plate 13 is welded between the two square tubes 12. Two triangular reinforcing plates 14 are provided at the bottom of the cross plate 13, and the motor 2 is provided on the cross plate 13. The two square tubes 12 can be used to strengthen the strength between the housing 1 and the cross plate 13, and the triangular reinforcing plates 14 can ensure the effective connection between the cross plate 13 and the two square tubes 12.

[0053] Further, in this embodiment, a control box 3 is provided on the housing 1. The control box 3 includes a box cover 31, a bottom plate 32, and a drive board. A potentiometer knob 33 is provided on the box cover 31, and the potentiometer knob 33 can be rotated to adjust the rotation speed of the motor 2 within 0 - 400 revolutions to achieve stepless adjustment of the fan speed.

[0054] The bottom plate 32 is welded to the outer wall of the housing 1, and the drive board is installed on the bottom plate 32. The bottom plate 32 is bent from a steel plate into an arch shape, which can ensure the air flow and improve the heat dissipation effect of the drive board in the control box 3.

[0055] Further, in this embodiment, the pedestal type circular fan further includes a push handle 4. Bolting holes are opened at both ends of the push handle 4 and are fixed to the curled edge 11 of the housing 1 by self-drilling screws. Specifically, the push handle 4 is a circular steel pipe, and both sides are connected to the housing 1 through a triangular plate.

[0056] In this embodiment, the pedestal type circular fan further includes a front net 8 and a rear net 5 provided on the housing 1. The front net 8 and the rear net 5 are respectively fixed to the curled edge 11 of the housing 1 by self-drilling screws. Among them, the front net 8 and the rear net 5 are spiral air meshes that are slightly bulged in the middle.

[0057] In this embodiment, the motor 2 is a permanent magnet variable frequency inner rotor motor 2, which has the characteristics of low speed and large torque. The maximum speed is 400 revolutions per minute, and it can directly drive the wind blade 7 to output a large torque at low speed, ensuring the advantages of large air volume and low noise.

[0058] The beneficial effects of the circular fan of the utility model for posts are as follows:

[0059] Through the above technical solutions, the utility model can ensure the air volume, effectively improve the environmental temperature, while reducing the wind resistance, improving the work efficiency, and reducing the wind howling sound and environmental noise brought by the operation of the fan. In addition, the utility model is convenient to move when not in use, and can be firmly fixed on the ground without random movement when in use, ensuring the stability of operation safety.

[0060] The above are only the preferred embodiments of the utility model, and do not limit the patent scope of the utility model accordingly. Any equivalent structural transformation made by using the description and drawings of the utility model under the concept of the utility model, or direct / indirect application in other related technical fields, is included in the patent protection scope of the utility model.

Claims

1. A post-type circular fan, characterized in that: include: A housing, a motor, a fan blade and a caster assembly, wherein the motor and the fan blade are arranged in the housing, the caster assembly is arranged at the bottom of the housing, and the fan blade is connected to the output shaft of the motor; The fan blade comprises a fan blade flange and a plurality of blades, the fan blade flange is connected to the output shaft of the motor, the plurality of blades are evenly arranged around the fan blade flange, the blade is in a semi-symmetrical airfoil shape, and a streamlined tail wing is installed at the tail of the blade.

2. The post-type circular fan according to claim 1, characterized in that: The tail of the blade is provided with three inner holes, and the tail wing is provided with three protrusions matching with the three inner holes, and the three protrusions are arranged in the corresponding inner holes.

3. The post-type circular fan according to claim 1, characterized in that: The blades are made of aluminum alloy.

4. The post-type circular fan according to claim 1, characterized in that: The housing is circular, and curling edges are arranged on two sides of the housing.

5. The post-type circular fan according to claim 4, characterized in that: The caster assembly is divided into two groups, and the caster assembly includes a support foot, a caster mounting plate and a universal caster with brake, the support foot is arranged at the bottom of the housing, the caster mounting plate is arranged at the bottom of the support foot, and the universal caster with brake is arranged at the bottom of the caster mounting plate; The support leg is U-shaped, and the top of the support leg extends outward to form a folded edge, and the folded edge is connected to the housing.

6. The post-type circular fan according to claim 4, characterized in that: Two parallel square tubes are welded in the casing, a horizontal plate is welded between the two square tubes, two triangular reinforcing plates are arranged at the bottom of the horizontal plate, and the motor is arranged on the horizontal plate.

7. The post-type circular fan according to claim 1, characterized in that: The casing is provided with a control box, the control box comprising a box cover, a bottom plate and a drive plate, the box cover is provided with a potentiometer knob, the bottom plate is welded to the outer wall of the casing, the drive plate is mounted on the bottom plate, and the bottom plate is made of steel plate bent into an arch shape.

8. The post-type circular fan according to claim 4, characterized in that: The utility model also comprises a push handle, wherein two ends of the push handle are provided with bolt mounting holes, and the push handle is fixed on the curling edge of the housing by self-drilling screws.

9. The post-type circular fan according to claim 4, characterized in that: It also includes a front net and a rear net arranged on the casing, wherein the front net and the rear net are respectively fixed to the curled edge of the casing by self-drilling screws; the front net and the rear net are spiral wire wind nets with a slightly bulging middle.

10. The post-mounted circular fan according to any one of claims 1 to 9, characterized in that: The motor is a permanent magnet variable frequency inner rotor motor.

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