Noise reduction impeller for range hood

Abstract

The utility model discloses a noise reduction impeller for a range hood. The noise reduction impeller comprises a baffle ring, the blades are uniformly arranged between the two baffle rings in the same direction; sawteeth are arranged on the sides, facing the rotating direction of the impeller, of the blades and located in the middles of the blades, and when the impeller rotates, the sawteeth are used for combing air flow and reducing noise. The centrifugal fan can effectively prevent outlet airflow of the blades from being excessively concentrated, noise reduction is facilitated, and it is guaranteed that dynamic pressure of the air outlet of the centrifugal fan is not attenuated.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of noise reduction impeller for range hood. BACKGROUND

[0002] Range hood is a kind of kitchen appliance for purifying kitchen environment, it is installed above kitchen stove, exhaust gas produced by combustion is discharged outside room, reduces the harm of waste gas to human body.

[0003] Impeller is an important component of range hood, and it is important for generating wind power, and discharging oil fume. The impeller in the prior art generally adopts straight line structure, in the process of impeller rotation, the outlet airflow of blade is too concentrated, not only increases noise, but also makes the dynamic pressure of centrifugal fan outlet attenuate, affects suction and exhaust effect. UTILITY MODEL CONTENT

[0004] The utility model aims at the deficiency of prior art and provides a kind of noise reduction impeller for range hood technical scheme, can effectively avoid the outlet airflow of blade is too concentrated, not only is favorable for the reduction of noise, and guarantees the dynamic pressure of centrifugal fan outlet not attenuate.

[0005] In order to solve the above technical problems, the utility model adopts the following technical scheme:

[0006] A kind of noise reduction impeller for range hood, including

[0007] Retaining ring;

[0008] And several blades, blade is uniformly arranged between two retaining rings in the same direction;

[0009] It is characterized in that:

[0010] The side of blade towards impeller rotating direction is provided with sawtooth, sawtooth is located in the middle of blade, when impeller rotates, it is used for combing wind flow, reduces noise;Through the design of above-mentioned structure, the outlet airflow of blade can be effectively avoided to be too concentrated, not only is favorable for the reduction of noise, and guarantees the dynamic pressure of centrifugal fan outlet not attenuate.

[0011] Further, sawtooth is of circular arc structure, facilitating manufacture and processing.

[0012] Further, the diameter of sawtooth is S2, 3.5mm

[0013] Further, the tooth root of sawtooth is of circular arc structure, facilitating manufacture and processing.

[0014] Further, the diameter of tooth root is S1, 3.5mm

[0015] Further, the root part and the edge of the blade are provided with a circular arc chamfer, and the radius of the circular arc chamfer is r, and 1.5mm < r < 2mm.

[0016] Further, the distance between the bottom end of the root part and the edge of the blade is H, and 3.5mm < H < 4mm.

[0017] Further, the baffle ring comprises a first baffle ring, a second baffle ring and a reinforcing baffle ring, the reinforcing baffle ring is located between the first baffle ring and the second baffle ring, the first baffle ring, the second baffle ring and the reinforcing baffle ring are concentric circles, the blades are distributed between the first baffle ring and the reinforcing baffle ring and between the reinforcing baffle ring and the second baffle ring, and through the design of the reinforcing baffle ring, the strength and stability of the whole impeller can be improved, and the service life is prolonged.

[0018] Further, the connecting disc is integrally formed with the reinforcing baffle ring, and is convenient for manufacturing and processing.

[0019] Further, the connecting disc is integrally formed with the reinforcing baffle ring, and is convenient for manufacturing and processing.

[0020] The utility model discloses the following beneficial effects are obtained by adopting the technical scheme:

[0021] The utility model discloses can effectively avoid the export airflow of blade too concentrated, not only be favorable for the reduction of noise, and guarantee the dynamic pressure of centrifugal fan's air outlet not attenuation. BRIEF DESCRIPTION OF DRAWINGS

[0022] The utility model will be further described in connection with the drawings:

[0023] Figure 1 It is the effect picture of a kind of for oil fume machine's noise reduction impeller of the utility model;

[0024] Figure 2 It is Figure 1 Front view;

[0025] Figure 3 It is Figure 1 Left view;

[0026] Figure 4 It is Figure 2 Layout enlarged view of I place in;

[0027] In the drawing: 1-blade;101-sawtooth;2-first baffle ring;3-second baffle ring;4-reinforcing baffle ring;5-connecting disc;501-shaft sleeve;502-through groove. DETAILED DESCRIPTION

[0028] It should be noted that the embodiments and features in the present application can be combined with each other without conflict. The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings and in combination with the embodiments.

[0029] In order for those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings and in combination with the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

[0030] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion.

[0031] As shown in Figures 1 to 4 As shown in the drawings, the present application is a noise reduction impeller for a range hood, which comprises a retaining ring and a plurality of blades 1, and the blades 1 are uniformly arranged in the same direction between the two retaining rings.

[0032] The retaining ring comprises a first retaining ring 2, a second retaining ring 3 and a reinforcing retaining ring 4, the reinforcing retaining ring 4 is located between the first retaining ring 2 and the second retaining ring 3, the first retaining ring 2, the second retaining ring 3 and the reinforcing retaining ring 4 are concentric circles, the blades 1 are distributed between the first retaining ring 2 and the reinforcing retaining ring 4, and between the reinforcing retaining ring 4 and the second retaining ring 3. Through the design of the reinforcing retaining ring 4, the strength and stability of the entire impeller can be improved, and the service life can be prolonged.

[0033] The length of the blades 1 between the first retaining ring 2 and the reinforcing retaining ring 4 is L1, the length of the blades 1 between the reinforcing retaining ring 4 and the second retaining ring 3 is L2, and L1>L2.

[0034] It also comprises a connecting disc 5, which is integrally formed with the reinforcing retaining ring 4, facilitating manufacturing and processing.

[0035] The connecting disc 5 is provided with a shaft sleeve 501 and a through groove 502, the shaft sleeve 501 is vertically arranged at the center of the connecting disc 5, and the through groove 502 is annularly distributed on the connecting disc 5. The shaft sleeve 501 is used for connecting the output shaft of the motor, and the through groove 502 facilitates the flow of gas, improving the smoke exhaust efficiency.

[0036] The side of the blade 1 facing the rotating direction of the impeller is provided with a sawtooth 101, which is located at the middle part of the blade 1, and is used for combing the airflow when the impeller rotates, thereby reducing noise.

[0037] The sawtooth 101 is in a circular arc structure, facilitating manufacturing and processing. The diameter of the sawtooth 101 is S2, 3.5mm<S2<4mm.

[0038] The tooth root of the sawtooth 101 is in a circular arc structure, facilitating manufacturing and processing. The diameter of the tooth root is S1, 3.5mm<S1<4mm.

[0039] The tooth root and the edge of the blade 1 are provided with a circular arc chamfer, the radius of the circular arc chamfer is r, 1.5mm<r<2mm. The spacing between the bottom end of the tooth root and the edge of the blade 1 is H, 3.5mm<H<4mm.

[0040] Through the design of the above structure, the outlet airflow of the blade 1 can be effectively avoided from being too concentrated, which is not only beneficial to the reduction of noise, but also ensures that the dynamic pressure of the outlet of the centrifugal fan is not attenuated.

[0041] The above is only a specific embodiment of the present application, but the technical features of the present application are not limited to this. Any simple change, equivalent replacement or modification for realizing basically the same technical effect based on the present application is covered in the protection scope of the present application.

Claims

1. A noise reduction impeller for a range hood, comprising a baffle ring; and a plurality of blades, the blades being uniformly arranged in the same direction between the two baffle rings; characterized in that: a sawtooth is arranged on the side of the blade facing the direction of rotation of the impeller, the sawtooth being located in the middle of the blade, and when the impeller rotates, it is used to comb the airflow and reduce noise.

2. A noise reducing impeller for a range hood according to claim 1, wherein: The sawtooth is in a circular arc structure.

3. A noise reducing impeller for a range hood according to claim 2, wherein: The diameter of the sawtooth is S2, 3.5mm < S2 < 4mm.

4. A noise reducing impeller for a range hood according to claim 1, wherein: The tooth root of the sawtooth is in a circular arc structure.

5. A noise reducing impeller for a range hood according to claim 4, wherein: The diameter of the tooth root is S1, 3.5mm < S1 < 4mm.

6. A noise reducing impeller for a range hood according to claim 4, wherein: The tooth root and the edge of the blade are provided with a circular arc chamfer, and the radius of the circular arc chamfer is r, 1.5mm < r < 2mm.

7. A noise reducing impeller for a range hood according to claim 4, wherein: The spacing between the bottom end of the tooth root and the edge of the blade is H, 3.5mm < H < 4mm.

8. A noise reducing impeller for a range hood according to claim 1, wherein: The baffle ring comprises a first baffle ring, a second baffle ring and a reinforcing baffle ring, the reinforcing baffle ring is located between the first baffle ring and the second baffle ring, the first baffle ring, the second baffle ring and the reinforcing baffle ring are concentric circles, and the blades are distributed between the first baffle ring and the reinforcing baffle ring and between the reinforcing baffle ring and the second baffle ring.

9. A noise reducing impeller for a range hood according to claim 8, wherein: It also includes a connecting disc, which is integrally formed with the reinforcing baffle ring.

10. A noise reducing impeller for a range hood according to claim 9, wherein: A shaft sleeve and a through groove are arranged on the connecting disc, the shaft sleeve is vertically arranged at the center of the connecting disc, and the through groove is annularly distributed on the connecting disc.

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