阅读说明：本技术 通气治疗设备、风机及其风叶 (Ventilation treatment equipment, fan and fan blade thereof ) 是由 于晓飞 费科 苏琳 于 2019-10-14 设计创作，主要内容包括：本发明公开一种风叶,包括底座以及若干叶片,叶片固定于底座的上表面,底座上设置有与转轴安装配合的轴孔,叶片的首端靠近轴孔,叶片的末端位于底座的边缘,叶片位于其首端与末端之间的部分依次包含首尾对接的直体段、第一弯曲段及第二弯曲段,第一弯曲段和第二弯曲段均朝同一侧弯曲,第一弯曲段的曲率大于第二弯曲段的曲率。在实际的工作过程中,风叶中的空气在离心力的作用下被直体段呈大面积地加速推出,通过曲率较大的第一弯曲段对空气进行导向,再通过曲率较小的第二弯曲段对空气进行加速甩出,因此减轻风叶的惯量并减少气流通过风叶外边缘时的涡流量。本发明还同时公开了一种具有该风叶的风机以及具有该风机的通气治疗设备。(The invention discloses a fan blade, which comprises a base and a plurality of blades, wherein the blades are fixed on the upper surface of the base, the base is provided with a shaft hole which is matched with a rotating shaft in an installing way, the head ends of the blades are close to the shaft hole, the tail ends of the blades are positioned at the edge of the base, the part of the blades positioned between the head ends and the tail ends of the blades sequentially comprises a straight body section, a first bending section and a second bending section which are in butt joint end to end, the first bending section and the second bending section are both bent towards the same side, and the curvature of the first bending section is larger than that of the. In the actual working process, air in the fan blade is pushed out in a large-area accelerating mode by the straight section under the action of centrifugal force, the air is guided through the first bending section with large curvature, and then the air is thrown out in an accelerating mode through the second bending section with small curvature, so that inertia of the fan blade is reduced, and eddy flow of air flow passing through the outer edge of the fan blade is reduced. The invention also discloses a fan with the fan blade and ventilation treatment equipment with the fan.)

1. The utility model provides a fan blade, includes base and a plurality of blade, the blade is fixed in the upper surface of base, be provided with on the base with pivot installation complex shaft hole, its characterized in that: the head end of blade is close to the shaft hole, the end of blade is located the edge of base, the part that the blade is located between its head end and the end contains straight section, first crooked section and the crooked section of second of head-tail butt joint in proper order, first crooked section with the crooked section of second all is towards same side bending, the camber of first crooked section is greater than the camber of the crooked section of second.

2. The fan blade of claim 1, wherein: the blade includes first lamellar body and the second lamellar body of mutual independence, first lamellar body is followed the upper surface of base is evenly arranged, and adjacent two form first runner between the first lamellar body, the second lamellar body sets up in the first runner.

3. The fan blade of claim 2, wherein: the second sheet body extends to the outlet end of the first flow channel from a preset position away from the inlet end of the first flow channel.

4. The wind of claim 2 also, wherein: along the extending direction of the first flow channel, the heights of the first sheet body and the second sheet body are gradually reduced.

5. A fan blade according to claim 3, wherein: the head end of the straight body section of the first sheet body is perpendicular to the upper surface of the base, and the head end of the straight body section of the second sheet body is inclined to the upper surface of the base.

6. The fan blade of claim 1, wherein: the tail end of the second bending section is located at the edge position of the base, and the tail end of the second bending section is inclined to the upper surface of the base.

7. The fan blade of claim 1, wherein: the length of the second curved section is greater than the length of the first curved section.

8. The fan blade of claim 1, wherein: the blades are radially arranged with the shaft hole as the center.

9. The fan blade of claim 1, wherein: the upper surface of base is the horizontal plane, the lateral wall of base is from last to outwards inclining down.

10. The fan blade of claim 1, wherein: the middle part of the upper surface of the base is provided with an upward convex mounting part, and the shaft hole extends from the base to the mounting part.

11. The fan blade of claim 10, wherein: the installation department with circular arc transition forms the water conservancy diversion face between the base.

12. A fan, its characterized in that: the fan blade of any one of claims 1 to 11, wherein an output shaft of the driving device is connected with the fan blade and drives the fan blade to rotate.

13. A ventilation therapy device, characterized by: a blower comprising the blower of claim 12.

Technical Field

The invention relates to a structure of a fan applied to the field of medical health, in particular to ventilation treatment equipment, a fan and fan blades thereof.

Background

With the rapid development of society, an electric motor, which is a machine that can convert electric energy into mechanical energy, mainly includes an electromagnet winding or distributed stator winding for generating a magnetic field and a rotating armature or rotor. Under the action of the rotating magnetic field of the stator winding, current passes through the effective edge of the stator winding and is driven by the magnetic field to rotate. In addition to motors used in many machines used in daily life, motors are used in various devices in the medical field, such as: bi-level respirators and oxygen generators, etc.

As is known, bi-level respirators or oxygen generators have increasingly high requirements for fan response speed, dynamic flow, pressure stability and noise reduction. A decisive factor influencing the response speed, dynamic flow and pressure stability of the volute fan is the fan blades, generally, the fan blades used in the above devices are all centrifugal fan blades; the existing centrifugal fan blade basically comprises a base and a plurality of blades fixed on the base, wherein the blades are fixed on the upper surface of the base, a shaft hole for penetrating the output end of a power supply machine is formed in the base, the blades in the existing fan blade are all of a section of complete cambered surface structure, and the heights of all parts at the tops of the blades are the same. In the actual working process, the motor drives the fan blades to rotate, air in the centers of the fan blades is pressurized through the fan blades and is thrown out along a fan blade channel between the two fan blades; in the cognition of the field of traditional fan blade manufacture, when a blade is manufactured into a section of complete straight surface, the maximum wind pressure can be generated, but the resistance borne by the fan blade in the rotating process is larger, so that the fan blade needs to be matched with a motor with higher power, even if the motor with higher power is matched with the motor for use, the increase degree of the loss generated by the motor is overlarge, and therefore the straight blade is not suitable for being adopted, so that in the existing public knowledge of people, the fan blade is only manufactured into a section of complete cambered surface, and the heights of all parts of the top of the cambered surface are equal, so that the flow maximization can be realized on the premise of ensuring the pressure stability, but the fan blade of the existing cambered surface blade cannot meet the increasing requirement.

Therefore, a fan blade for improving the response speed of the fan, increasing the dynamic flow rate of the fan, and improving the pressure stability of the fan is needed to overcome the above-mentioned drawbacks.

Disclosure of Invention

The invention aims to provide a fan blade which can improve the response speed of a fan, increase the dynamic flow of the fan and improve the pressure stability of the fan.

Another objective of the present invention is to provide a fan, which includes a fan blade for increasing the response speed of the fan, increasing the dynamic flow of the fan, and improving the pressure stability of the fan.

It is yet another object of the present invention to provide a ventilation therapy device that includes a blower having a fan blade that increases the response speed of the blower, increases the dynamic flow of the blower, and increases the pressure stability of the blower.

In order to achieve the above object, the present invention provides a fan blade, including a base and a plurality of blades, where the blades are fixed on the upper surface of the base, the base is provided with a shaft hole that is matched with a rotating shaft, the head ends of the blades are close to the shaft hole, the tail ends of the blades are located at the edge of the base, the part of the blades located between the head ends and the tail ends of the blades sequentially includes a straight body section, a first bending section and a second bending section that are butted end to end, the first bending section and the second bending section are both bent toward the same side, and the curvature of the first bending section is greater than that of the second bending section.

Preferably, the blades include mutually independent first blades and second blades, the first blades are uniformly arranged along the upper surface of the base, a first flow channel is formed between every two adjacent first blades, and the second blades are arranged in the first flow channel.

Preferably, the second sheet extends from a predetermined position away from the inlet end of the first flow channel to the outlet end of the first flow channel.

Preferably, along the extending direction of the first flow channel, the heights of the first sheet and the second sheet are gradually reduced.

Preferably, the head end of the straight section of the first sheet body is perpendicular to the upper surface of the base, and the head end of the straight section of the second sheet body is inclined to the upper surface of the base.

Preferably, the end of the second bending section is located at the edge position of the base, and the end of the second bending section is inclined to the upper surface of the base.

Preferably, the length of the second curved section is greater than the length of the first curved section.

Preferably, the blades are radially arranged with the shaft hole as a center.

Preferably, the upper surface of the base is a horizontal plane, and the side wall of the base inclines outwards from top to bottom.

Preferably, the middle part of the upper surface of the base is provided with an upward convex mounting part, and the shaft hole extends from the base to the mounting part.

Preferably, the arc transition between the installation part and the base forms a flow guide surface.

In order to achieve the purpose, the invention provides a fan which comprises a driving device and the fan blade, wherein an output shaft of the driving device is connected with the fan blade and drives the fan blade to rotate.

In order to achieve the above object, the present invention provides a ventilation therapy device comprising the blower described above.

Compared with the prior art, the head end of the blade is close to the shaft hole, the tail end of the blade is located at the edge of the base, the part of the blade located between the head end and the tail end of the blade sequentially comprises a straight body section, a first bending section and a second bending section which are in butt joint end to end, the first bending section and the second bending section are both bent towards the same side, and the curvature of the first bending section is larger than that of the second bending section. Therefore, in the actual working process of the fan blade, air entering the fan blade is accelerated and pushed out by the straight section in a large area under the action of centrifugal force, then the air is guided by the first bending section with larger curvature, and finally the air is accelerated and thrown out by the second bending section with smaller curvature; experiments prove that the fan blade has the beneficial effects of improving the response speed of a fan, increasing the dynamic flow of the fan and improving the pressure stability of the fan, and the technical prejudice that the flow maximization can be realized on the premise of ensuring the pressure stability only by manufacturing the blade into a section of complete cambered surface and enabling the heights of all parts at the top of the cambered surface to be equal in the traditional fan blade manufacturing technology is overcome.

Drawings

Fig. 1 is a schematic perspective view of a fan blade according to the present invention.

Fig. 2 is a schematic perspective view of another angle of the fan blade of the present invention.

Figure 3 is a side view of a fan blade of the present invention.

Figure 4 is a cross-sectional view of a fan blade of the present invention.

Fig. 5 is a top view of a fan blade of the present invention.

Detailed Description

In order to explain technical contents, structural features, and effects achieved by the present invention in detail, the following detailed description is given with reference to the embodiments and the accompanying drawings.

Referring to fig. 1 to 5, a fan blade 100 of the present invention includes a base 10 and a plurality of blades 20. The blade 20 is fixed in the upper surface of base 10, be provided with on the base 10 with pivot installation complex shaft hole 10a, the head end of blade 20 is close to shaft hole 10a, the end of blade 20 is located the edge of base 10, the part that the blade 20 is located between its head end and the end contains straight section 21, first crooked section 22 and the second crooked section 23 of head-to-tail butt joint in proper order, first crooked section 22 and second crooked section 23 all bend towards same side, the camber of first crooked section 22 is greater than the camber of second crooked section 23. Specifically, the blades 20 are radially arranged centering on the mounting portion, but not limited thereto. More specifically, the following:

with reference to fig. 1 to 5, the end 231 of the second bending section 23 is located at the edge of the base 10, and the end 231 of the second bending section 23 is inclined to the upper surface of the base 10, which is beneficial for smooth air flow to exhaust air, so as to increase the stability of the fan blade in operation; preferably, the length of the second bending section 23 is greater than the length of the first bending section 22, so that the air is guided by the first bending section 22 and then thrown out by the second bending section 23 with smaller curvature and longer length in the process of being pushed to the second bending section 23 by the straight body section 21, thereby ensuring the dynamic flow of the fan blade 100 of the present invention.

With reference to fig. 1 to 5, the vane 20 includes a first plate 210 and a second plate 220 that are independent from each other, the first plates 210 are uniformly arranged along the upper surface of the base 10, a first flow channel 210a is formed between two adjacent first plates 210, and the second plate 220 is disposed in the first flow channel 210 a. Specifically, the second sheet 220 extends from a predetermined position away from the inlet end of the first flow channel 210a to the outlet end of the first flow channel 210 a; the heights of the first blade body 210 and the second blade body 220 are gradually reduced along the extending direction of the first flow channel 210a, and the unequal height design of the blades 20 reduces the inertia of the blades, thereby improving the response speed, being beneficial to the uniform distribution of fluid, and reducing the vortex amount when airflow passes through the outer edge of the blades, so that the pressure stability of the blades 100 in the operation process is further improved. More specifically, the head end 2101 of the straight section 21 of the first plate 210 is perpendicular to the upper surface of the base 10, and the head end 2201 of the straight section 21 of the second plate 220 is inclined to the upper surface of the base 10, so that the first end 2101 of the straight section 21 of the first plate 210 ensures that the wind blade 100 has better flow output, and simultaneously, the head end 2201 of the straight section 21 of the second plate 220 is matched to evacuate the vortex at the air inlet, which is favorable for the stability of the wind blade 100 during operation. For example, the number of the first sheet bodies 210 is 11, and the number of the second sheet bodies 220 is also 11, and experiments prove that the dynamic stability of the flow field of the fan blade 100 of the present invention can be improved by the number of the blades 20.

Referring to fig. 1 to 5, the upper surface 11 of the base 10 is a horizontal plane, and the side walls of the base 10 are inclined outward from top to bottom. Specifically, the middle part of the upper surface 11 of the base 10 is provided with an upwardly convex mounting part 111, and the shaft hole 10a extends from the base 10 to the mounting part 111; more specifically, the arc transition between the mounting portion 111 and the base 10 forms a flow guiding surface, so that it is more beneficial to guide the air at the air inlet, but not limited thereto. As shown in fig. 1, the lower surface 12 of the base 10 is provided with a convex ring 121 protruding downward, so that any part of the convex ring 121 can be cut as required to ensure the dynamic balance of the fan blade 100 of the present invention during operation, but is not limited thereto. Of course, in other embodiments, the lower surface 12 of the base 10 may also be downwardly protruded with a plurality of protrusions, and the protrusions are arranged at intervals.

Meanwhile, the invention also discloses a ventilation treatment device which comprises a fan, wherein the fan is provided with the fan blade 100.

Compared with the prior art, the head end of the blade 20 of the invention is close to the shaft hole 10a, the tail end of the blade 20 is located at the edge of the base 10, the part of the blade 20 located between the head end and the tail end thereof sequentially comprises a straight body section 21, a first bending section 22 and a second bending section 23 which are butted end to end, the first bending section 22 and the second bending section 23 are both bent towards the same side, and the curvature of the first bending section 22 is greater than that of the second bending section 23. Therefore, in the actual working process of the fan blade 100 of the present invention, the air entering the fan blade 100 is accelerated and pushed out by the straight body section 21 in a large area under the action of the centrifugal force, then the air is guided by the first bending section 22 with a large curvature, and finally the air is accelerated and thrown out by the second bending section 23 with a small curvature; experiments prove that the fan blade 100 has the beneficial effects of improving the response speed of a fan, increasing the dynamic flow of the fan and improving the pressure stability of the fan, and overcomes the technical prejudice that the flow maximization can be realized on the premise of ensuring the pressure stability only by manufacturing the fan blade into a section of complete cambered surface and ensuring the equal heights of all parts at the top of the cambered surface in the traditional fan blade manufacturing technology.

The above disclosure is only a preferred embodiment of the present invention, which is convenient for those skilled in the art to understand and implement, and certainly not to limit the scope of the present invention, therefore, the present invention is not limited by the claims and their equivalents.