Impeller, fan and range hood

Abstract

The impeller comprises a first wheel disc and a second wheel disc which are oppositely arranged, a plurality of blades are arranged between the first wheel disc and the second wheel disc, and the blades are arranged in the circumferential direction of the first wheel disc; the blades are obliquely arranged relative to the axis of the impeller, sawtooth sections are arranged on the edges of the air inlet sides of the blades, and each sawtooth section comprises a plurality of oblique sawteeth. The sawtooth section arranged on the edge of the air inlet side can effectively cut high-speed airflow, resistance of the section of the blade is reduced, and air noise is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to impeller technical field especially, impeller, fan and range hood. BACKGROUND

[0002] Range hood as the important tool of improving kitchen environment, through the oil fume inside the kitchen of shuffling, realizes the function of purifying indoor air. Fan as the core power component of range hood, its aerodynamic performance directly decides the overall working performance of range hood, and multi-wing centrifugal fan is widely applied in range hood because of its performance characteristics of high pressure coefficient, large flow coefficient and low working noise.

[0003] At present, people's design to kitchen space size is higher and higher, and the structure of range hood gradually develops to miniaturization and lightness, therefore a multi-wing centrifugal impeller with smaller thickness is provided, when the multi-wing centrifugal impeller is installed, the impeller chassis is upwardly protruded higher for leaving installation space for driving motor, under the condition of thickness reduction, the higher protrusion will affect the entry of high-speed airflow, and the actual utilization rate of impeller blade also drops, and fan noise increases. SUMMARY

[0004] Based on the technical problems existing in the background art, the utility model provides an impeller, fan and range hood to reduce fan noise.

[0005] The utility model provides an impeller, fan and range hood to reduce fan noise.

[0006] The first disc and the second disc are oppositely arranged, a plurality of blades are arranged between the first disc and the second disc, and the plurality of blades are arranged along the circumference of the first disc; the plurality of blades are inclined relative to the impeller axis, the air inlet side edge of the blade is provided with a sawtooth section, and the sawtooth section comprises a plurality of inclined sawteeth.

[0007] Preferably, the size of the inclined sawtooth decreases in the direction from the first disc to the second disc.

[0008] Preferably, the length of the sawtooth section is 2 / 3 to 4 / 5 of the length of the blade.

[0009] Preferably, the inclination angle of the blade relative to the impeller axis is 70° to 80°.

[0010] Preferably, the width of the blade decreases in the direction from the first disc to the second disc.

[0011] Preferably, the outer circumference of the first disc is folded in the direction away from the second disc to form a first air guide reinforcing rib.

[0012] Preferably, the second wheel disc outer circumference is folded away from the first wheel disc direction to form a second air guide reinforcing rib.

[0013] Preferably, the first air guide reinforcing rib and the first wheel disc form an angle of 45°-60°; and / or

[0014] The second air guide reinforcing rib and the second wheel disc form an angle of 45°-60°.

[0015] The fan provided by the utility model contains the above-mentioned impeller.

[0016] The range hood provided by the utility model contains the above-mentioned fan.

[0017] The utility model discloses a beneficial technical effect:

[0018] The impeller provided by the utility model is provided with multiple inclined blades, and a sawtooth section is arranged at the air inlet side edge of the blade of the impeller, so that multiple inclined sawteeth included in the sawtooth section can effectively cut high-speed airflow in the working process of the impeller, so that the purpose of reducing wind noise is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The utility model discloses an impeller structure schematic view;

[0020] Figure 2 The utility model discloses an impeller sectional view;

[0021] Figure 3 The utility model discloses an impeller partial A-A enlarged view;

[0022] Figure 4 The utility model discloses an impeller partial B-B enlarged view;

[0023] Figure 5 The utility model discloses a blade structure schematic view.

[0024] In the drawing: 1-first wheel disc, 11-first air guide reinforcing rib, 2-blade, 21-sawtooth section, 211-inclined sawtooth, 3-second wheel disc, 31-second air guide reinforcing rib, 4-flange plate, 5-fastener, 6-bottom disc. DETAILED DESCRIPTION

[0025] The utility model will be further explained in connection with specific embodiment.

[0026] Embodiment 1

[0027] Reference Figure 1The impeller proposed in this utility model includes: a first impeller 1 and a second impeller 3 arranged opposite to each other, a plurality of blades 2 arranged between the first impeller 1 and the second impeller 3, and the plurality of blades 2 arranged along the circumference of the first impeller 1; the plurality of blades 2 are inclined relative to the impeller axis, and the air inlet side edge of the blades 2 is provided with a serrated section 21, the serrated section 2 including a plurality of oblique serrations 211.

[0028] The impeller axis is the central axis of the first disc 1 and the second disc 3, and the impeller rotates around this axis during operation. Figure 1 As shown, multiple blades 2 are all inclined relative to the impeller axis, which can increase the effective area of ​​multiple blades and increase the air volume.

[0029] In the impeller provided in this embodiment of the utility model, the air inlet edge of the impeller blades is provided with a serrated section. Therefore, during the operation of the impeller, the multiple oblique serrations included in the serrated section can effectively cut the high-speed airflow, thereby achieving the purpose of reducing wind noise.

[0030] Furthermore, such as Figure 1 As shown, a base 6 is provided in the middle of the first impeller 1. The base 6 protrudes towards the second impeller 3 to accommodate the motor. A flange 4 is fixed to the middle of the base 6 on one side of the second impeller 3 by fasteners 5. The drive shaft of the motor is connected to the flange 4, realizing the connection between the impeller and the motor. The fasteners 5 can be rivets, etc.

[0031] The serrated section 21 on the blade 2 is located on the side near the first impeller 1. The length of the serrated section 21 can be 2 / 3 to 4 / 5 of the length of the blade 2, and the length can be determined according to the actual situation. This application does not limit this length. When the impeller of this embodiment is assembled into a centrifugal fan, the second impeller 3 is the air inlet. The airflow enters the impeller from one end of the second impeller 3 and exits through the gap between the blades 2. Since the wind resistance is greater closer to the first impeller in the impeller, by setting a serrated section on the blade near the first impeller, the resistance of this section can be reduced, and the overall efficiency of the impeller can be improved.

[0032] The length of the serrated segment 21 on each blade 2 can be the same. For example, the length of the serrated segment 21 on each blade 2 is 2 / 3 of the blade length.

[0033] The length of the serrated segment 21 on each blade 2 can also be different. For example, along the impeller rotation direction, the length of the serrated segment 21 on each blade 2 gradually increases or decreases. This utility model does not limit this.

[0034] Specifically, such as Figure 5 As shown, the oblique sawtooth is an asymmetrical structure, meaning that the slope of the oblique sawtooth on the side closer to the first impeller is less than the slope of the oblique sawtooth on the side closer to the second impeller. This structure can reduce the resistance and wind noise of the airflow from entering the impeller to exiting the impeller.

[0035] In addition, the size of the oblique sawtooth 211 decreases in the direction from the first disc 1 to the second disc 3, that is, in the direction from the first disc 1 to the second disc 2, and the tooth root width of the plurality of oblique sawteeth 211 gradually decreases. Since the resistance of the airflow is increasingly large when flowing in the direction from the second disc to the first disc, the stability of the impeller can be maintained and the wind noise can be reduced by adopting the decreasing structure design.

[0036] The inclination angle of the blade 2 relative to the impeller axis is 70°-80°, and the specific inclination angle is designed according to the actual situation. In the case that the width of the impeller is unchanged, the effective area of the blade can be increased, thereby increasing the air volume.

[0037] In addition, the width of the blade 2 decreases in the direction from the first disc 1 to the second disc 3. By this setting, the ability to transport airflow with greater capacity can be achieved without affecting the size of the impeller air inlet. For the existing equal-width blade, the airflow will form a vortex under the action of resistance after entering the impeller from the second disc, which will generate a large amount of wind noise. By decreasing the width of the blade 2 in the direction from the first disc 1 to the second disc 3, and combining the sawtooth section provided on the edge of the air inlet side of the blade 2, the formation of vortex in the impeller can be avoided, and the wind noise can be further reduced.

[0038] As a preferred scheme of the embodiment, the outer circumference of the first disc 1 is folded away from the direction of the second disc 3 to form a first air guide reinforcing rib 11, and the included angle between the first air guide reinforcing rib 11 and the first disc 1 is 45°-60°. The outer circumference of the second disc 3 is folded away from the direction of the first disc 1 to form a second air guide reinforcing rib 31, and the included angle between the second air guide reinforcing rib 31 and the second disc 3 is 45°-60°. The first air guide reinforcing rib 11 and the second air guide reinforcing rib 31 can be symmetrically arranged. The design of the air guide reinforcing rib can guide the airflow to leave the fan, reduce the vortex, reduce the wind noise, and increase the efficiency, and can also strengthen the strength structure of the upper and lower discs.

[0039] Embodiment 2

[0040] The fan provided by the embodiment of the utility model contains the impeller in the embodiment 1, the fan can be centrifugal fan, the second disc side of the impeller is the air inlet end when the impeller is assembled in the fan, and the bottom disc of the first disc is connected with the motor driving shaft of the fan through the flange plate.

[0041] The fan provided by the embodiment of the utility model can improve the noise caused by the thickness reduction of the fan and improve the performance of the fan.

[0042] Embodiment 3

[0043] The range hood provided by the utility model contains the fan in the embodiment 2.

[0044] In the embodiment of the utility model, the range hood can be a separate range hood or an integrated range hood integrated with an integrated cooker, and the utility model is not limited in this regard.

Claims

1. An impeller, characterized by The application relates to a fan wheel and a fan. The application relates to a fan wheel and a fan.

2. The impeller of claim 1, wherein The application relates to a fan wheel and a fan.

3. The impeller of claim 1, wherein The application relates to a fan wheel and a fan.

4. The impeller of claim 1, wherein The application relates to a fan wheel and a fan.

5. The impeller of claim 1, wherein The application relates to a fan wheel and a fan.

6. The impeller of claim 1, wherein The application relates to a fan wheel and a fan.

7. The impeller of claim 6, wherein The application relates to a fan wheel and a fan.

8. The impeller of claim 7, wherein The application relates to a fan wheel and a fan. The application relates to a fan wheel and a fan.

9. A fan characterised by The application relates to a fan wheel and a fan.

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