CN111255718A

CN111255718A - Vertical axis electric fan and vertical axis fan body

Info

Publication number: CN111255718A
Application number: CN202010272254.4A
Authority: CN
Inventors: 李沐瑶
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-09
Filing date: 2020-04-09
Publication date: 2020-06-09
Anticipated expiration: 2040-04-09
Also published as: CN111255718B

Abstract

The invention relates to a vertical shaft electric fan, comprising: a fan body configured to suck and discharge an airflow while rotating, wherein the fan body has an upper casing, a lower casing, and a plurality of fan blades arranged between the upper casing and the lower casing, wherein the upper casing has an opening for introducing the airflow, and the fan blades are arranged between the upper casing and the lower casing such that the fan blades suck the airflow from the opening in a direction of a main shaft and discharge the airflow in a direction perpendicular to the main shaft while rotating around the main shaft; and a driving device configured to drive the fan blades to rotate around the main shaft. The invention also relates to a vertical shaft fan body. The fan has the advantages that the air supply surface of the electric fan can be increased in a centrifugal air outlet mode, the air path is simple and efficient, the structure of the fan is simple, the cost is low, and more flexible fan blade configuration can be realized according to different occasions.

Description

Vertical axis electric fan and vertical axis fan body

Technical Field

The invention relates to the field of ventilation equipment or fans, in particular to a vertical shaft electric fan. In addition, the invention also relates to a vertical shaft fan body.

Background

Most of the conventional electric fans adopt a horizontal axis fan (i.e. an axial flow fan, the air outlet direction of which is parallel to the main axis), and the main axis of the fan blade is driven by a motor to rotate so as to push the air to move along the axial direction and discharge the air along the main axis direction (or axial direction). The current electric fans on the market mainly adopt two modes: 1. the vertical horizontal shaft electric fan is provided with an oscillating mechanism to realize periodic adjustment of the wind direction, however, the oscillating angle range is limited, and only a single direction can be influenced at the same time, so that the user experience of the electric fan is poor; 2. the ceiling fan, namely the horizontal axis fan is arranged on the roof to realize the air flow in a wider range, but the ceiling fan has higher requirements on a stress plane (roof) and installation, is generally fixedly installed and has the defect of incapability of carrying and moving.

In order to achieve diversified air outlet or air supply directions, some attempts have been made in the prior art, such as the following documents:

CN104963881A/U proposes an electric fan capable of blowing air in horizontal and vertical directions, which adopts horizontal axis fan blades and realizes 360-degree blowing air by designing two independent rotating shafts. However, the design is complicated and costly.

CN102116302A discloses an omnidirectional electric fan with a hot air blowing function, which can omnidirectionally discharge radiant heat generated by a heating device installed in a central shaft by using vertical fan blades. According to the scheme, 360-degree lateral air outlet can be realized, but the electric fan cannot achieve optimal cold-heat separation because the air inlet and the air outlet are both in the lateral direction.

CN-101555883A discloses a wide-angle electric fan, which is characterized in that an independent rotating shaft and a motor driving part are designed on the basis of a traditional horizontal shaft ceiling fan, so that the coverage area of the ceiling fan can be enlarged, and the problem that the existing electric fan equipment installed in public places generally has wind dead angles is solved. However, the cost is high in practical application, and the problem of torsional fatigue of the cable is difficult to solve.

CN2065688U adopts two fan blade wheels of horizontal axial flow type and centrifugal type, all places on the motor main shaft, and speed air current realizes the omnidirectional air current in motor main shaft direction and the direction perpendicular to the main shaft during operation. However, the double wind wheel structure of this solution is complex and costly.

CN2135675Y proposes a circular fan, which is characterized in that a motor is disposed in a base, a central shaft perpendicular to the motor is disposed in the center of the base, fan blades of the fan are vertically disposed on a shaft, and the motor drives the shaft to rotate, so that wind is provided around the shaft. CN-2248259Y proposes a desk-top cylindrical electric fan, in which the electric fan has a motor, blades and its main shaft all set perpendicular to the horizontal plane, and the blade shafts are fixed on the motor shaft and the supporting seat on the top of the outer cover, respectively, so that the fan can supply air in 360 degrees cylindrical surface in the horizontal direction when working. However, the fan blades of both the CN-2135675Y and CN-2248259Y are directly fixed on the main shaft perpendicular to the horizontal plane, resulting in low wind pressure and low efficiency.

At present, an electric fan with wide air supply surface coverage, simple structure and high efficiency is still needed.

Disclosure of Invention

Starting from the prior art, the task of the invention is to provide a vertical axis electric fan and a vertical axis fan body, wherein the vertical axis electric fan and/or the vertical axis fan body can enlarge the air supply surface of the electric fan in a centrifugal air outlet mode, and the air path is simple and efficient, so that the fan has a simple structure and low cost, and can realize more flexible blade configuration according to different occasions.

In a first aspect of the invention, this task is solved by a vertical axis electric fan comprising:

a fan body configured to suck and discharge an airflow while rotating, wherein the fan body has an upper casing, a lower casing, and a plurality of fan blades arranged between the upper casing and the lower casing, wherein the upper casing or the lower casing has an opening for introducing the airflow, and the fan blades are arranged between the upper casing and the lower casing such that the fan blades suck the airflow from the opening in a direction of a main shaft and discharge the airflow in a direction perpendicular to the main shaft while rotating around the main shaft; and

a drive device configured to drive the fan blades to rotate about the main axis.

The term "spindle" refers to the shaft or axis about which the fan rotates, wherein the spindle may refer to either a solid shaft or an imaginary straight line, i.e., an axis. For example, in the present invention, a solid spindle is not provided, but the fan blades may be fixed by the upper and lower housings and be rotatable about the imaginary axis.

In one embodiment of the invention, it is provided that the upper housing and the lower housing are arranged parallel to one another and the fan blades are arranged vertically between the upper housing and the lower housing. Through this extension scheme, can realize air inlet direction and air-out direction mutually perpendicular simply. In other embodiments, however, other angles between the direction of the inlet air and the direction of the outlet air may be provided, such as 70-85.

In a further embodiment of the invention, it is provided that the drive is mounted on the lower housing in the direction of the spindle in order to drive the fan body in rotation. By means of this embodiment, a rotation of the fan blades can be achieved in a simple manner. In other embodiments, a different drive scheme may be provided, such as driving the fan blades directly by the drive means rather than driving the fan bodies.

In a preferred aspect of the invention, it is provided that the blades are curved and the plurality of blades are arranged such that the outer end points of the plurality of blades are all on the circumference of a first circle and the inner end points of the plurality of blades are all on the circumference of a second circle, and wherein the inner inclination angle of the blades is the angle of the blades at the inner end points to the second circle and the outer inclination angle of the blades is the angle of the blades at the outer end points to the first circle, wherein:

the inner inclination angle of the fan blades is 30 degrees and the outer inclination angle thereof is 45 degrees; and/or

The inner inclination angle of the fan blade is 15 degrees and the outer inclination angle thereof is 90 degrees.

This preferred solution is based on the inventors' insight as follows: the inventor of the invention found through research that the turbulent kinetic energy of the 30 °/45 ° inclination angle combination (A/B expression, wherein A represents the inner inclination angle and B represents the outer inclination angle) of the fan blade is the smallest and has the larger air output, while the turbulent kinetic energy of the 15 °/90 ° inclination angle combination of the fan blade is smaller and has the largest air output. By this preferred solution, a minimum turbulence or a maximum air throughput can be achieved.

In one embodiment of the invention, it is provided that the vertical axis electric fan further comprises a support part configured to support the fan body, wherein the height of the support part is adjustable.

In a preferred embodiment of the present invention, the vertical axis electric fan further includes a flexible tube having one end connected to the opening and the other end configured to be connectable to an air passage of an air conditioner or a fan heater. With this preferred arrangement, the vertical axis electric fan can be additionally used to blow cool air from the air conditioner, thereby achieving more directional and larger area blowing of cool air. Similarly, the vertical axis electric fan of the present invention may be used for a heating apparatus in which the flexible tube is configured to be capable of communicating with an outlet of the heating apparatus, such as a fan heater.

In a further preferred embodiment of the invention, the fan blades are of an aerodynamic lift type or a curved fan-shaped structure. By this preferred solution, the fluid dynamics of the fan blades can be optimized, thereby achieving less noise and/or higher air supply efficiency.

In one embodiment of the invention, it is provided that the fan blades are distributed uniformly in the fan body. Here, "uniformly distributed" means that the fan blades are arranged on the peripheries of the upper and lower cases at equal spaced distances or spaced angles from each other.

In a second aspect of the invention, the aforementioned task is solved by a vertical axis fan comprising:

an upper housing connected to upper ends of the fan blades;

a lower housing connected to lower ends of the fan blades, wherein the upper or lower housing has an opening for introducing an air flow; and

a plurality of fan blades arranged between the upper housing and the lower housing such that the fan blades draw in an air flow from the opening in a direction of the main shaft and discharge the air flow in a direction perpendicular to the main shaft when rotating about the main shaft.

It should be noted that although the fan body of the present invention is described by taking an electric fan as an example, it should be noted that the fan body can also be applied to other fields such as air conditioning, heating, ventilating fans, etc.

In a preferred aspect of the present invention, it is provided that each fan blade is of a curved shape with a constant width, and the plurality of fan blades are arranged such that the outer end points of the plurality of fan blades are all on the circumference of a first circle and the inner end points of the plurality of fan blades are all on the circumference of a second circle, and wherein the inner inclination angle of the fan blades is the angle between the fan blades at the inner end points and the second circle, and the outer inclination angle of the fan blades is the angle between the fan blades at the outer end points and the first circle, for example:

In a further preferred embodiment of the invention, it is provided that each fan blade is arranged rotatably between the upper housing and the lower housing, so that the camber angle and/or the camber angle of the fan blade can be adjusted. For example, each fan blade may have a rotating shaft that is fixed with the upper and/or lower housing such that each fan blade can rotate. Other attachment means are also contemplated within the teachings of the present invention, such as the attachment of the fan blades to the upper and/or lower housing via a universal joint or a joint ball. In addition, the fan blades can be connected with each other, so that when the orientation of one fan blade is adjusted, all the fan blades can be driven to rotate, and the orientations of all the fan blades are adjusted to be consistent.

In one embodiment of the invention, it is provided that the vertical axis fan further comprises:

a screen disposed in the opening and/or outside of the fan blades; and/or

And the protective net is arranged outside the fan blades.

Through setting up the filter screen, can provide cleaner air, and increase the protection network, can prevent that the mistake from touching the flabellum and causing the injury. The screen may comprise, for example, activated carbon or other filter material. The protection net may be a mesh or a fence, for example.

In addition, the invention also provides an air conditioner which is provided with the vertical shaft fan body, wherein the vertical shaft fan body is communicated with an air path of the air conditioner through a flexible pipe.

The invention has at least the following beneficial effects: the invention can favorably decouple/orthogonalize the directions of the air inlet and the air outlet by adopting a vertical shaft/centrifugal fan structure, thereby realizing the air outlet structure of 360 degrees without influencing or interfering the air inlet, and better expanding the air outlet coverage of the electric fan without an additional mechanical swinging device; meanwhile, the fan blade is simple in structure, low in cost and flexible in configuration, and the number and parameters of the fan blades can be flexibly configured, so that the fan blade is suitable for being applied to various occasions.

Drawings

The invention is further elucidated with reference to the drawings in conjunction with the detailed description.

Figure 1 shows a schematic view of a vertical axis sector according to the invention;

FIG. 2 illustrates a schematic view of a vertical axis electric fan according to the present invention; and

fig. 3 shows an application scenario of the vertical axis fan according to the present invention.

Detailed Description

It should be noted that the components in the figures may be exaggerated and not necessarily to scale for illustrative purposes. In the figures, identical or functionally identical components are provided with the same reference symbols.

In the present invention, "disposed on …", "disposed over …" and "disposed over …" do not exclude the presence of an intermediate therebetween, unless otherwise specified. Further, "disposed on or above …" merely indicates the relative positional relationship between two components, and may also be converted to "disposed below or below …" and vice versa in certain cases, such as after reversing the product direction.

In the present invention, the embodiments are only intended to illustrate the aspects of the present invention, and should not be construed as limiting.

In the present invention, the terms "a" and "an" do not exclude the presence of a plurality of elements, unless otherwise specified.

It is further noted herein that in embodiments of the present invention, only a portion of the components or assemblies may be shown for clarity and simplicity, but those of ordinary skill in the art will appreciate that, given the teachings of the present invention, required components or assemblies may be added as needed in a particular scenario.

It is also noted herein that, within the scope of the present invention, the terms "same", "equal", and the like do not mean that the two values are absolutely equal, but allow some reasonable error, that is, the terms also encompass "substantially the same", "substantially equal". By analogy, in the present invention, the terms "perpendicular", "parallel" and the like in the directions of the tables also cover the meanings of "substantially perpendicular", "substantially parallel".

The numbering of the steps of the methods of the present invention does not limit the order of execution of the steps of the methods. Unless specifically stated, the method steps may be performed in a different order.

Fig. 1 shows a schematic view of a vertical axis fan body 100 according to the present invention.

As shown in fig. 1, the vertical axis fan body 100 according to the present invention includes the following components (some of which are optional):

an upper case 101 connected to one end, e.g., an upper end, of fan blades 103. Here, the upper housing 101 is shown with an opening 104 for introducing an air flow, but in other embodiments the lower housing 102 may also be provided with an opening 104 for introducing an air flow, in which case the upper housing 101 does not have an opening. Here, the upper case 101 is configured as a circular plate, and the opening 104 is a circular hole concentric with the upper case 101. Other shapes and configurations of the upper housing 101 and opening 104 are also contemplated as desired for the application in light of the teachings of the present invention.

Lower case 102 is connected to the other end, lower end, of blade 103. Here, the lower case 102 is configured as a circular plate without an opening, which is the same as or similar to the shape and size of the upper case 101. Other shapes and configurations of the lower housing 102 are also contemplated as desired for the application under the teachings of the present invention. By constructing the flat

upper cases

101 and 102, wind resistance can be minimized, thereby increasing the amount of wind discharged.

A plurality of blades 103 arranged between the upper housing 101 and the lower housing 102 such that the blades 103, when rotating about the main axis, draw an air flow from the opening 104 in the direction of the main axis 105 (see arrow a) and expel the air flow in a direction perpendicular to the main axis 105 (see arrow B). Here, each blade 103 is of the same shape and size, being a curved shape with a constant width, for example in this embodiment the blades are arc-shaped segments, such as truncated segments of a cylinder, where the blades are concave on one side and convex on the other side. By configuring the number and geometry of the fan blades, it is possible to customize the fan body or fan blades with desired aerodynamic properties, for example the fan blades may be of an aerodynamic lift type configuration or a curved fan configuration. By doing so, for example, the fluid dynamics of the fan blades may be optimized, thereby achieving less noise and/or higher air delivery efficiency.

In the present embodiment, the plurality of blades 103 are arranged such that the outer end points of all blades 103 are all on the circumference of a first circle and the inner end points of all blades 103 are all on the circumference of a second circle, wherein the inner inclination angle of the blades 103 is the angle between the blades at the inner end points and the second circle, and the outer inclination angle of the blades 103 is the angle between the blades 103 at the outer end points and the first circle, wherein the inner inclination angle of the blades is preferably 30 ° and the outer inclination angle thereof is 45 °, or the inner inclination angle of the blades is preferably 15 ° and the outer inclination angle thereof is 90 °. The preferred angle setting described above is based on the inventors' unique study of:

on the basis of a three-dimensional structure model of a fan main body, three types of typical backward-inclined blade types (the inward inclination angle is larger than 0 and smaller than 90 degrees, and the outward inclination angle is 45 degrees), forward-inclined blade types (the inward inclination angle is larger than 90 degrees and smaller than 180 degrees, and the outward inclination angle is 135 degrees) and radial blade types (the inward inclination angle is larger than 0 degrees and smaller than 180 degrees, and the outward inclination angle is 90 degrees) are selected for carrying out fluid simulation analysis, wherein each type of blade type corresponds to a plurality of different combinations of the inward inclination angle and the outward inclination.

Combinations (in °) of 15/45, 30/45, 45/45, 60/45, 75/45, and 90/45 were created at 15-degree intervals by adjusting the angle of the back-raked fan blade to its inscribed circle, where a represents the inner inclination and B represents the outer inclination in the a/B notation. Similarly, the angle between the anteversion fan blades and the inscribed circle was adjusted to produce a combination (in °) of 90/135, 105/135, 120/135, 135/135, 150/135, 165/135.

The angle between the radial fan blades and the inscribed circle thereof is adjusted to generate 15/90, 30/90, 45/90, 60/90, 75/90, 105/90, 120/90, 135/90, 150/90 and 165/90 combinations (unit degrees) at intervals of 15 degrees.

And aiming at each internal and external inclination angle combination, the air quantity Q and the turbulent flow pulsation kinetic energy k of the fan are calculated in a traversing manner, the air quantity and the noise intensity of each combination are compared (assuming that the noise intensity is in positive correlation with the turbulent flow pulsation kinetic energy), and an internal and external inclination angle combination scheme with the optimal comprehensive performance is obtained.

Aiming at the two schemes with the optimal comprehensive performance obtained by the calculation, namely the 30-degree/45-degree inclination angle combination of the backward inclined type fan blades and the 15-degree/90-degree inclination angle combination of the radial type fan blades, the three-dimensional wind speed distribution and the analysis and comparison of the turbulent kinetic energy cloud picture and the pressure cloud picture are carried out. The wind speed and turbulence kinetic energy data of the three-dimensional space are corrected, the fact that the output wind quantity of the two combinations is large, the wind speed distribution is uniform, the characteristics of low turbulence intensity and low noise are achieved, and the design scheme is optimal in comprehensive performance. Through comparing the air volume and turbulence pulsation kinetic energy of different blade inner and outer inclination angle combinations corresponding to the backward tilting blade type and the forward tilting blade type, the comparison data shows that the turbulence kinetic energy of the inclination angle combination of the backward tilting blade 30/45 is the minimum and has larger air volume. By comparing the air volume and turbulent flow pulsation kinetic energy data of different inclination angle combinations corresponding to the radial blade type, the fact that the turbulent flow kinetic energy of the 15/90 inclination angle combination of the radial blade type is smaller and has the maximum air volume can be determined.

Further, each fan blade 103 may be rotatably disposed between the upper and

lower cases

101 and 102, so that the camber angle and/or the camber angle of the fan blade 103 can be adjusted. For example, each blade 103 may have a rotating shaft (not shown) that may be fixed with the upper housing 102 and/or the lower housing 102 such that each blade may rotate. Other attachment means are contemplated within the teachings of the present invention, such as a fan blade attached to the upper housing 101 and/or the lower housing 102 via a universal joint or a joint ball (not shown). In addition, the blades 103 may be connected to each other such that when the orientation of a single blade 103 is adjusted, all blades 103 may be driven to rotate, thereby adjusting the orientation of all blades to be uniform. For example, a portion of all blades 103, such as the tail or the lower end, may be connected to each other by a tensioned cord, such that when each blade 103 rotates, the tensioned cord will drive the other blades 103 to rotate by the same angle, thereby adjusting the camber angle and/or the camber angle or the orientation of all blades 103 to be uniform.

An optional screen (not shown) arranged in said opening 104 and/or outside of the fan 103, i.e. surrounding the fan 103 from the outside. By providing a screen, cleaner air can be provided. The screen may comprise, for example, activated carbon or other filter material.

An optional protective net (not shown) arranged outside the fan 103, i.e. surrounding the fan 103 from the outside. Through increasing the protection network, can prevent that the mistake from touching the flabellum and causing the injury. The protection net may be a mesh or a fence, for example.

Fig. 2 shows a schematic view of a vertical axis electric fan 200 according to the present invention.

As shown in fig. 2, the vertical axis electric fan 200 according to the present invention includes the following components (some of which are optional):

a fan body 100 configured to suck and discharge an air flow while rotating. For further details of the fan body 100, reference may be made to fig. 1 and the description thereof.

A drive arrangement (not shown) configured to drive the fan blades in rotation about the main axis. For example, the driving device is installed at the lower casing in the direction of the main shaft to drive the whole fan body to rotate, and then drives each fan blade to rotate. The drive means may be, for example, a brushless dc motor.

An optional support part 202 configured to support the fan body 100 and additionally the drive means, wherein the height of the support part is adjustable, for example a telescopic rod or with a height adjusting nut. The support member 202 is also optionally provided with a base 203 for contacting the ground and stably supporting the electric fan 200 on the ground.

Fig. 3 shows an application scenario of the vertical axis fan body 100 according to the present invention.

As shown in fig. 3, the opening of the vertical axis fan body 100 according to the present invention is connected to the air path of the air conditioner 301, such as the air outlet duct of the air conditioner 301, through the flexible pipe 302. Therefore, cold air or warm air output by the air conditioner 301 can be output to the periphery in the direction of 360 degrees through the vertical shaft fan body 100, so that the air outlet coverage is improved, and the comfort of the air conditioner is improved. The flexible tube is, for example, a bendable plastic tube or a metal bellows. The vertical axis fan body 100 according to the present invention can also be used for other air processing devices such as a heating device, an air cleaning device, a central air conditioner, and the like.

Although some embodiments of the present invention have been described herein, those skilled in the art will appreciate that they have been presented by way of example only. Numerous variations, substitutions and modifications will occur to those skilled in the art in light of the teachings of the present invention without departing from the scope thereof. It is intended that the following claims define the scope of the invention and that methods and structures within the scope of these claims and their equivalents be covered thereby.

Claims

1. A vertical axis electric fan comprising:

2. The vertical axis electric fan according to claim 1, wherein the upper and lower housings are arranged parallel to each other, and the fan blades are arranged vertically between the upper and lower housings.

3. The vertical axis electric fan according to claim 1, wherein the driving means is mounted at the lower housing in the direction of the main axis to drive the fan body to rotate.

4. The vertical axis electric fan of claim 1 wherein the blades are curved and the plurality of blades are arranged such that outer end points of the plurality of blades are all on a circumference of a first circle and inner end points of the plurality of blades are all on a circumference of a second circle, and wherein an inner angle of a blade is an angle of a blade at an inner end point to the second circle and an outer angle of a blade is an angle of a blade at an outer end point to the first circle, wherein:

5. The vertical axis electric fan of claim 1, further comprising a support member configured to support a fan body, wherein the support member is adjustable in height.

6. The vertical axis electric fan according to claim 1, further comprising a flexible tube having one end connected to the opening and the other end configured to be connectable to an air path of an air conditioner or a fan heater or an air cleaner.

7. The vertical axis electric fan of claim 1, wherein the fan blades are of an aerodynamic lift type configuration or a curved fan configuration.

8. The vertical axis electric fan of claim 1, wherein the fan blades are evenly distributed in the fan body.

9. A vertical axis fan body comprising:

an upper shell connected with the upper ends of the fan blades,

a lower housing connected to lower ends of the fan blades, wherein the upper or lower housing has an opening for introducing an air flow;

and

10. The vertical axis fan of claim 9, wherein each fan blade is a constant width curved shape and the plurality of fan blades are arranged such that the outer end points of the plurality of fan blades are all on the circumference of a first circle and the inner end points of the plurality of fan blades are all on the circumference of a second circle, and wherein the inner inclination angle of a fan blade is the angle that the fan blade makes with the second circle at the inner end point and the outer inclination angle of a fan blade is the angle that the fan blade makes with the first circle at the outer end point, wherein:

11. The vertical axis fan of claim 9, wherein each fan blade is rotatably disposed between the upper and lower housings such that the camber and/or camber of the fan blade can be adjusted.

12. The vertical axis fan body of claim 11, wherein the plurality of blades are connected to each other such that when adjusting the camber and/or camber of one or more blades, other blades are brought to the same camber and/or camber by the connection.

13. The vertical axis sector of claim 9, further comprising:

a screen disposed in the opening and/or outside of the fan blades; and/or

And the protective net is arranged outside the fan blades.

14. An air conditioner having the vertical axis fan body according to any one of claims 9 to 11, wherein the vertical axis fan body is communicated with an air passage of the air conditioner through a flexible tube.