Impeller, fan for ventilation treatment equipment and ventilation treatment equipment
By designing the air guide protrusion on the top of the air inlet end of the impeller to fill the gap between the upper volute and the air inlet end of the blade, the existing impeller noise and pressure increase problem is solved, and efficient ventilation and low noise are achieved.
Patent Information
- Application Number
- CN202421556360.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-02
- Publication Date
- 2025-04-25
- Estimated Expiration
- 2034-07-02
AI Technical Summary
The noise generated by the existing impeller during rotation is difficult to suppress, and the output pressure is difficult to increase, which cannot meet the needs of ventilation treatment equipment for efficient ventilation.
An impeller is designed, which protrudes upwardly at the top of the air inlet end, and uses the air inlet protrusion to fill the gap between the upper volute and the air inlet end of the blade to reduce the airflow velocity gradient, increase static pressure, and reduce noise.
By reducing the airflow velocity gradient, the effect of increasing the output pressure is achieved, while reducing fan noise and improving the efficiency of ventilation treatment equipment.
Smart Images
Figure CN222797755U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of fans and accessories thereof, in particular to an impeller, a fan for ventilation therapy equipment and the ventilation therapy equipment. Background Art
[0002] The fan is the core component of a home ventilator. Its function is to increase gas pressure and deliver gas by inputting mechanical energy to improve oxygenation and ventilation, reduce the work of breathing, support respiratory and circulatory functions, and treat respiratory failure. The impeller is one of the important components of the fan. In the prior art, due to the structural limitations of the impeller, it is difficult to further suppress the noise generated during the rotation of the impeller, and it is also difficult to increase the output pressure.
[0003] Therefore, there is an urgent need for an impeller that can effectively increase output pressure and reduce noise, a fan for ventilation therapy equipment, and ventilation therapy equipment to overcome the above-mentioned defects. Utility Model Content
[0004] The utility model aims to provide an impeller which can effectively increase the output pressure and reduce the noise.
[0005] Another object of the utility model is to provide a fan for ventilation therapy equipment that can effectively increase output pressure and reduce noise.
[0006] Another object of the present invention is to provide a ventilation therapy device that effectively improves output and reduces noise.
[0007] To achieve the first purpose mentioned above, the utility model provides an impeller including a blade disk having a structural center and a plurality of blades evenly arranged on the upper surface of the blade disk around the structural center. The blades are bent structures, and the blades have an air inlet end close to the structural center and an air outlet end close to the edge of the blade disk. An air guide protrusion protrudes upward from the top of the air inlet end.
[0008] Preferably, the wind guiding protrusion is connected to the top of the wind inlet end of the blade via a curved surface.
[0009] Preferably, the top of the wind guiding protrusion is a curved structure.
[0010] Preferably, the height of the blade from the air outlet end to the air inlet end gradually and evenly increases compared to the surface of the blade disk, and an air guide protrusion is provided on the side of the air inlet end away from the air outlet end. The air guide protrusion is further raised in height compared to the air inlet end, and the two are connected and transitioned by a curved surface structure.
[0011] Preferably, the slope of the curved surface between the wind guide protrusion and the wind inlet end is greater than the slope of the curved surface between the wind outlet end and the wind inlet end, and the side of the wind guide protrusion away from the wind inlet end extends obliquely downward to the surface of the blade disk.
[0012] Preferably, a structural boss protrudes upward around the structural center of the blade disk, the top surface of the structural boss forms a structural plane and the side surface forms an arc-shaped wind-guiding side surface, and the wind inlet end is arranged on the wind-guiding side surface.
[0013] Preferably, the air guiding protrusion is a boss structure extending upwards a certain distance from the air inlet end.
[0014] To achieve the second objective, the utility model provides a fan for ventilation therapy equipment, which includes a driver, an upper volute, a lower volute and the above-mentioned impeller. The upper volute is provided with an upper cavity and an upper air outlet slot connected to the upper cavity, and the top of the upper volute is provided with an air inlet connected to the upper cavity.
[0015] Preferably, the curvature of the curved surface structure of the air guiding protrusion is consistent with the curvature of the air inlet of the upper volute that is arranged oppositely.
[0016] Preferably, the topmost end of the air guiding protrusion extends out from the bottommost end of the air inlet.
[0017] Preferably, the distance between the end of the wind-guiding protrusion of the blade and the center of the structure is smaller than the radius of the air inlet.
[0018] Preferably, along the air inlet direction of the air inlet, the air inlet end of the blade gradually approaches the center of the structure.
[0019] Preferably, the lower volute is provided with a lower cavity and a lower air outlet slot connected to the lower cavity, the upper cavity and the lower cavity are assembled into a pressurized air cavity, the upper air outlet slot and the lower air outlet slot are assembled into an air outlet channel, the driver is fixedly connected to the lower volute and the upper end of the driver extends into the upper cavity, the impeller is installed at the output end of the driver, the impeller is arranged in the upper cavity, and the driver drives the impeller to rotate.
[0020] Preferably, a wind gap is enclosed between the curved surface structure of the wind guiding protrusion and the wall surface of the air inlet of the upper volute.
[0021] Preferably, the ratio of the radius of the impeller to the radius of the upper cavity falls within a range of 0.75 to 0.95.
[0022] To achieve the third objective mentioned above, the utility model provides a ventilation therapy device, which includes the above-mentioned fan.
[0023] Compared with the prior art, the utility model protrudes an air guide protrusion upward from the top of the air inlet end, and uses the air guide protrusion to fill and shield the gap between the air inlet end and the upper volute, so that most of the airflow can smoothly enter the flow channel from between the two blades, reducing the strong transition or low-speed area induced by the gap, further reducing the airflow velocity gradient, reducing the airflow velocity gradient, thereby reducing the dynamic pressure and increasing the static pressure, reducing the static pressure fluctuation, and achieving the effect of increasing the output pressure. In addition, the static pressure fluctuation is small, which can also achieve the effect of reducing the fan noise.
[0024] It is understandable that, since the fan for ventilation therapy equipment of the utility model includes the above-mentioned impeller, the fan for ventilation therapy equipment has the effect of increasing output pressure and reducing fan noise. The ventilation therapy equipment of the utility model includes the above-mentioned fan, so it also has the effect of increasing output pressure and reducing fan noise. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 It is a stereoscopic diagram of the fan used for ventilation therapy equipment of the utility model.
[0026] Figure 2 It is a top view of the fan used for ventilation therapy equipment of the utility model.
[0027] Figure 3 It is a stereoscopic diagram of the fan for ventilation therapy equipment of the utility model after the upper volute is separated.
[0028] Figure 4 yes Figure 3 The blower for ventilation therapy equipment is shown in a perspective view with the impeller further separated.
[0029] Figure 5 It is a stereoscopic diagram of the fan for ventilation therapy equipment of the utility model after being completely disassembled.
[0030] Figure 6 The utility model is a fan edge for ventilation treatment equipment Figure 2 Sectional view after cutting along the AA line segment.
[0031] Figure 7 It is a bottom view of the upper volute of the utility model.
[0032] Figure 8 It is a stereoscopic diagram of the impeller of the utility model.
[0033] Fig. 9 It is a front view of the impeller of the utility model.
[0034] Fig.10 It is a top view of the impeller of the utility model.
[0035] Fig.11 The impeller edge of the utility model Fig.10 The cross-sectional view obtained after cutting along the BB line segment. DETAILED DESCRIPTION
[0036] In order to explain the technical content and structural features of the present invention in detail, further description will be given below in combination with the embodiments and the accompanying drawings.
[0037] The utility model provides a fan 100 for ventilation therapy equipment. The ventilation therapy equipment can be a household ventilator, a medical ventilator, a high-flow humidified oxygen therapy equipment, an oxygen production equipment, etc. The fan 100 is used to pressurize the airflow flowing into the fan, and the pressurized gas is delivered to the patient for use, thereby increasing the patient's lung ventilation volume, improving respiratory function, and maintaining continuous ventilation of the patient.
[0038] like Figures 1 to 6 As shown, the fan 100 for ventilation therapy equipment of the utility model includes an impeller 10, a driver 20, an upper volute 30 and a lower volute 40. The upper volute 30 is provided with an upper cavity 31 and an upper air outlet slot 32 connected to the upper cavity 31, and the top of the upper volute 30 is provided with an air inlet 33 connected to the upper cavity 31. The lower volute 40 is provided with a lower cavity 41 and a lower air outlet slot 42 connected to the lower cavity 41. The upper cavity 31 and the lower cavity 41 are assembled into a pressurized air cavity 01, and the upper air outlet slot 32 and the lower air outlet slot 42 are assembled into an air outlet channel 02. The driver 20 is fixedly connected to the lower volute 40 and the upper end of the driver 20 extends into the upper cavity 31, and the driver 20 drives the impeller 10 to rotate. The driver 20 drives the impeller 10 to rotate, and the gas enters the pressurized air cavity 01 through the air inlet 33. The gas is pressurized by the rotating impeller 10 in the pressurized air cavity 01, and the pressurized air is output from the air outlet 02. By extending the upper end of the driver 20 into the upper cavity 31, the air in the pressurized air cavity 01 contacts the part of the driver 20 extending into the pressurized air cavity 01 when flowing, taking away part of the heat generated by the driver 20 when running, dissipating the heat of the driver 20, and enhancing the heat dissipation effect.
[0039] like Figure 4 , Figure 5 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 and Fig.11As shown, the utility model mainly improves the structure of the impeller 10. The impeller 10 provided by the utility model includes a blade disk 11 having a structural center and a plurality of blades 12 uniformly arranged on the upper surface of the blade disk 11 around the structural center. The blade 12 is a bent structure, and preferably, the blade 12 is bent in a counterclockwise direction, but not limited to this. The blade 12 has an air inlet end 121 close to the structural center and an air outlet end 122 close to the edge of the blade disk 11. An air guide protrusion 123 protrudes upward from the top of the air inlet end 121. The structural center referred to above can be the center line of the blade disk 11, or the center of the circle of the blade disk 11. The utility model protrudes an air guide protrusion 123 upward from the top of the air inlet end 121, and uses the air gap formed between the top surface of the air guide protrusion 123 and the inner wall of the upper volute 30 to replace the larger gap formed between the top surface of the air inlet end 121 of the blade and the inner wall of the upper volute 30 if the air guide protrusion 123 is not provided, thereby achieving the filling and shielding around the corresponding air inlet 33 in the upper volute 30, so that most of the airflow entering the upper volute 30 from the air inlet 33 can smoothly enter the flow channel formed between the two adjacent blades from the space between the two adjacent blades, reducing the strong transition or low-speed area induced by the large gap formed between the top surface of the air inlet end 121 of the blade and the inner wall of the upper volute 30, further reducing the air flow velocity gradient, reducing the air flow velocity gradient, thereby reducing the dynamic pressure and increasing the static pressure, reducing the static pressure fluctuation, and achieving the effect of increasing the fan output pressure. In addition, the static pressure fluctuation is small, and the effect of reducing the fan noise can also be achieved. It is understandable that if the air guiding protrusion 123 is not provided, the gap between the air inlet end 121 and the upper volute 30 is relatively large, and a considerable portion of gas will pass through the gap, thereby affecting the output pressure of the fan and increasing the noise of the fan.
[0040] It is worth pointing out that the energy input by the motor will be converted into three parts: dynamic pressure, static pressure and loss. Among them, dynamic pressure can be understood as the root cause of noise, static pressure refers to the output pressure, and airflow velocity gradient refers to the difference between the maximum airflow velocity and the minimum airflow velocity.
[0041] like Figure 8 , Fig. 9 , Fig.10 and Fig.11 As shown, preferably, each blade 12 is arranged with equal length, each blade 12 adopts the same style, and a total of 14 blades 12 are arranged on the upper surface of the blade disk 11, but according to actual needs, a larger or smaller number of blades 12 can also be arranged. All blades 12 arranged on the top of the blade disk 11 are inclined in the same direction. In the embodiment provided by the utility model, all blades 12 are inclined in the counterclockwise direction ( Fig.10 The embodiment of the present invention is inclined in the direction indicated by the arrow C, but is not limited thereto.
[0042] The wind-guiding protrusion 123 is connected to the top of the blade 12 (further, to the top of the air inlet end 121) through a curved surface. Furthermore, the top of the wind-guiding protrusion 123 is a curved surface structure, which makes the gas flow in more smoothly. Furthermore, the height from the air outlet end 122 to the air inlet end 121 of the blade 12 gradually and evenly increases compared to the surface of the blade disk 11. The wind-guiding protrusion 123 is arranged on the side of the air inlet end 121 away from the air outlet end 122, and the wind-guiding protrusion 123 is further raised in height compared to the air inlet end 121, and the two are connected and transitioned through a curved surface structure to reduce wind resistance. Furthermore, the slope of the curved surface between the wind-guiding protrusion 123 and the air inlet end 121 is greater than the slope of the curved surface between the air outlet end 122 and the air inlet end 121, which also helps to reduce the influence of wind resistance. The side of the wind-guiding protrusion 123 away from the air inlet end 121 extends obliquely downward to the surface of the blade disk 11.
[0043] Please refer to Figure 6 and Fig. 9 The curvature of the curved surface structure of the air guide protrusion 123 is consistent with the curvature of the air inlet 33 of the upper volute 30, which makes the gas flow more smoothly and reduces noise. Figure 6 If the bottom of the air inlet 33 is defined as the part indicated by the arrow E, the top of the air guide protrusion 123 extends out of the bottom E of the air inlet 33. The arrangement at this point can reduce the leakage of the gas input into the upper volute 30 through the air inlet 33, and also limit the external radiation of the noise in the volute. Please refer to Figure 2 and Fig.10 The distance between the end of the wind guide protrusion 123 of the blade 12 and the center of the structure is less than the radius of the air inlet 33. Through this design, the air flow rate is reduced, thereby reducing the noise. Along the air inlet direction of the air inlet 33, the air inlet end 121 of the blade 12 gradually moves closer to the center of the structure. Please refer to Figure 6 A wind gap F is formed between the curved surface structure of the air guide protrusion 123 and the wall surface of the air inlet 33 of the upper volute 30. It can be understood that the wind gap F reduces the gap between the air inlet end 121 and the wall surface of the air inlet 33 of the upper volute 30, so that most of the gas flowing in from the air inlet 33 enters the fan through the space between two adjacent blades 12 ( Figure 6 The air flows in through the gap F, and the gas flowing through the gap F is less, which increases the intake pressure, thereby increasing the output pressure. It is worth noting that the value of the air gap F is greater than 0, so the impeller 10 can rotate normally without being stuck by the inner wall of the upper volute 30. The air guide protrusion 123 is a boss structure extending a certain distance upward from the air inlet end 121. In the embodiment provided by the utility model, the air guide protrusion 123 is a pointed boss, but is not limited thereto.
[0044] like Figure 6 , Figure 8 , Fig. 9 , Fig.10 and Fig.11 As shown, a structural boss 111 protrudes upward around the structural center of the blade disk 11, the top surface of the structural boss 111 forms a structural plane 112 and the side surface forms an arc-shaped wind-guiding side surface 113, and the air inlet end 121 is arranged on the wind-guiding side surface 113. The wind-guiding side surface 113 is formed by setting the structural boss 111, which is conducive to guiding the air to flow into the blade 12, and the wind inlet end 121 is arranged on the wind-guiding side surface 113, which is equivalent to raising the wind inlet end 121, so that the wind-guiding boss 123 can be raised, which makes the wind-guiding boss 123 and the wall surface of the air inlet 33 of the upper volute 30 closer to each other, which is more conducive to shielding the gap. A mounting through hole 114 is provided in the structural boss 111, and the mounting through hole 114 is provided for the output end of the driver 20 to pass through, so as to connect the impeller 10 and the driver 20. The mounting through hole 114 is coaxially arranged with the impeller 10. The driver 20 can be selected as an electric motor (i.e., an electric motor).
[0045] like Figure 6 , Figure 7 and Fig.10 As shown, the ratio of the radius of the impeller 10 to the radius of the upper cavity 31 falls within a range of 0.75 to 0.95. In the embodiment provided by the present invention, the ratio between the two is preferably 0.88. Fig.10 As shown, the radius of the impeller 10 is about 25 mm. Figure 7 As shown, the radius of the upper cavity 31 is 28.25 mm, that is to say, the two are very close. The above-mentioned limited design parameters are only the values of a preferred embodiment of the utility model, not the only limitation. Relevant technicians can adjust the values as needed.
[0046] The above disclosure is only a preferred example of the present invention, which cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are all within the scope of the present invention.
Claims
1. An impeller, characterized in that: It includes a blade disk with a structural center and a plurality of blades uniformly arranged on the upper surface of the blade disk around the structural center. The blade is a bent structure. The blade has an air inlet end close to the structural center and an air outlet end close to the edge of the blade disk. An air guide protrusion protrudes upward from the top of the air inlet end.
2. The impeller according to claim 1, characterized in that: The wind guiding protrusion is connected to the top of the wind inlet end of the blade through a curved surface.
3. The impeller according to claim 1, characterized in that: The top of the air guide protrusion is a curved structure.
4. The impeller according to claim 1, characterized in that: The height of the blade from the air outlet end to the air inlet end increases gradually and evenly compared to the surface of the blade disk, and the air guide protrusion is arranged on the side of the air inlet end away from the air outlet end. The air guide protrusion is further raised in height compared to the air inlet end, and the two are connected and transitioned by a curved surface structure.
5. The impeller according to claim 1, characterized in that: The slope of the curved surface between the air guide protrusion and the air inlet end is greater than the slope of the curved surface between the air outlet end and the air inlet end. A side of the wind guiding protrusion away from the air inlet end is inclined downwardly and extends to the surface of the blade disk.
6. The impeller according to claim 1, characterized in that A structural boss protrudes upward around the structural center of the blade disk, the top surface of the structural boss forms a structural plane and the side surface forms an arc-shaped wind-guiding side surface, and the air inlet end is arranged on the wind-guiding side surface.
7. The impeller according to claim 1, characterized in that The air guiding protrusion is a boss structure extending upward from the air inlet end for a certain distance.
8. A fan for ventilation therapy equipment, characterized in that: It comprises a drive, an upper volute, a lower volute and an impeller as claimed in any one of claims 1 to 7, wherein the upper volute is provided with an upper cavity and an upper air outlet slot connected to the upper cavity, and the top of the upper volute is provided with an air inlet connected to the upper cavity.
9. The fan according to claim 8, characterized in that: The curvature of the curved surface structure of the air guiding protrusion is consistent with the curvature of the air inlet of the upper volute arranged oppositely.
10. The fan according to claim 8, characterized in that: The top end of the air guiding protrusion extends out from the bottom end of the air inlet.
11. The fan according to claim 8, characterized in that: The distance between the end of the wind guiding protrusion of the blade and the center of the structure is smaller than the radius of the air inlet.
12. The fan according to claim 8, characterized in that: Along the air inlet direction of the air inlet, the air inlet ends of the blades gradually move closer to the center of the structure.
13. The fan according to claim 8, characterized in that: The lower volute is provided with a lower cavity and a lower air outlet slot connected to the lower cavity, the upper cavity and the lower cavity form a pressurized air cavity, the upper air outlet slot and the lower air outlet slot form an air outlet channel, the driver is fixedly connected to the lower volute and the upper end of the driver extends into the upper cavity, the impeller is installed at the output end of the driver, the impeller is provided in the upper cavity, and the driver drives the impeller to rotate.
14. The fan according to claim 8, characterized in that: A wind gap is formed between the curved surface structure of the wind guiding protrusion and the wall surface of the air inlet of the upper volute.
15. The fan according to claim 8, characterized in that: The ratio of the radius of the impeller to the radius of the upper cavity falls within a range of 0.75 to 0.
95.
16. A ventilation therapy device, characterized in that: Comprising a fan as described in any one of claims 8-15.