WO2023273453A1

WO2023273453A1 - Fan assembly and household appliance

Info

Publication number: WO2023273453A1
Application number: PCT/CN2022/083808
Authority: WO
Inventors: 唐伟鹏; 张野; 汪耀东; 李忠华
Original assignee: 佛山市顺德区美的洗涤电器制造有限公司
Priority date: 2021-06-29
Filing date: 2022-03-29
Publication date: 2023-01-05
Also published as: CN115539408A

Abstract

A fan assembly (100), comprising a volute (110), a rotor (12), a plurality of silencing ports (112), a housing (130), and a noise reduction cavity (140). The volute defines an accommodating cavity. The rotor is located in the accommodating cavity. The plurality of first silencing ports are spaced on the volute, and each first silencing port is communicated with the accommodating cavity. The housing is connected to the volute. The noise reduction cavity is located between the volute and the housing, and the noise reduction cavity is communicated with the first silencing ports, wherein the noise reduction cavity is at least partially located on the side of the volute away from the central axis of the rotor. A resonance silencing system formed by the volute and the housing has a small influence on the pneumatic performance of the rotor, and in addition, because a silencing surface of the resonance silencing system is tightly attached to a pneumatic noise source, better sound absorption and noise reduction effects are achieved. Also disclosed is a household appliance.

Description

Fan components and home appliances

This application claims the priority of the Chinese patent application with the application number 202110727866.2 and the title of the invention "fan assembly and household appliances" submitted to the State Intellectual Property Office of China on June 29, 2021, the entire contents of which are incorporated by reference in this application middle.

technical field

The present application relates to the technical field of air supply equipment, in particular, to a fan assembly and a household electrical appliance.

Background technique

At present, when a fan is used for ventilation and heat dissipation, the operating noise of the fan is harmful to the human body, and reducing the operating noise of the fan itself is of great help to the reduction of system noise.

Contents of the invention

The applicant found that the existing structure for denoising the fan is arranged outside the fan, which cannot directly absorb the noise source of the fan, and the noise reduction effect is not significant enough.

To this end, the first aspect of the present application is to propose a fan assembly.

The second aspect of the present application is to provide a household electrical appliance.

In view of this, according to the first aspect of the present application, a fan assembly is provided, which includes a volute, a wind wheel, a plurality of sound-absorbing openings, a casing and a noise reduction cavity, and the volute encloses an accommodation cavity. The wind wheel is located in the accommodation cavity. A plurality of first silencers are arranged on the volute at intervals, and each first silencer communicates with the accommodating cavity. The casing is connected to the volute. The noise reduction chamber is located between the volute and the casing, and communicates with the first noise reduction opening, wherein at least a part of the noise reduction chamber is located on a side of the volute away from the central axis of the wind wheel.

The fan assembly provided by this application includes a volute, a wind wheel, a plurality of sound-absorbing openings, a shell and a noise reduction cavity. When the airflow can be disturbed to achieve air supply. A plurality of first silencers are arranged on the volute at intervals, and each first silencer is communicated with the accommodating cavity. The casing is connected to the volute. Specifically, the casing is arranged on the outer wall of the volute away from the accommodating chamber. The casing and the volute form a noise reduction chamber, which is communicated with the accommodation chamber through the first noise reduction port. The fan assembly in this application includes a volute and a casing arranged in multiple layers, a plurality of first noise reduction ports arranged on the volute, and a noise reduction cavity between the volute and the casing, which together form a resonance damping chamber. Acoustic system, the first noise reduction port and the noise reduction chamber are facing the wind wheel, which is the source of aerodynamic noise, which can significantly improve the sound absorption effect of the fan assembly.

It should be noted that the resonant noise reduction system formed by the volute and casing proposed in this application has little influence on the aerodynamic performance of the wind wheel. Excellent sound absorption and noise reduction effect. At the same time, it also has the advantages of strong adaptability, simple structure, and low cost. On the basis of the original volute structure, it only needs to add an additional shell and the first noise reduction port.

Further, it is conceivable that since the wind wheel has a central axis, the axial, circumferential and radial directions of the fan assembly are all defined. A part of the volute, the noise reduction chamber and the casing are arranged radially from inside to outside. That is to say, at least a part of the noise reduction cavity is located on the side of the volute away from the central axis, and during the operation of the wind rotor, noise can enter the noise reduction cavity from the containing cavity through the first noise reduction opening.

Further, the casing is arranged on the outer peripheral wall of the volute, that is, the side of the outer peripheral wall of the volute away from the central axis has a noise reduction cavity, and the noise reduction cavity can resonate and eliminate noise at any position, and the effect is better. It should be noted that a part of the noise reduction cavity can also be located on the axial side of the volute, that is to say, the casing wraps the volute in the circumferential and axial directions. At this time, the noise reduction can be further increased. The volume of the cavity is conducive to the noise reduction effect.

According to a second aspect of the present application, a household appliance is provided, including the fan assembly provided by any of the above-mentioned designs.

The household appliances provided by the present application include the fan assembly provided by any of the above-mentioned designs, so they have all the beneficial effects of the fan assembly, and will not be repeated here.

It is conceivable that the home appliances include range hoods, air conditioners, and the like.

Specifically, the wind wheel in the fan assembly is a centrifugal wind wheel, and the aerodynamic noise generated by the centrifugal wind wheel is the main noise source of the range hood. By improving the structure of the fan assembly, the noise of the range hood can be reduced, and the comfort of the kitchen environment can be greatly improved.

Additional aspects and advantages of the application will become apparent in the description which follows, or may be learned by practice of the application.

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, wherein:

Figure 1 shows one of the partial structural schematic diagrams of a fan assembly according to an embodiment of the present application;

Fig. 2 shows the second partial structural schematic diagram of the fan assembly according to an embodiment of the present application;

Figure 3a shows one of the front views of the partial structure of the fan assembly according to an embodiment of the present application;

Fig. 3b shows the second front view of the partial structure of the fan assembly according to an embodiment of the present application;

Fig. 4 shows a top view of a partial structure of a fan assembly according to an embodiment of the present application;

Fig. 5 shows the third schematic diagram of the partial structure of the fan assembly according to an embodiment of the present application;

Fig. 6 shows the fourth schematic diagram of the partial structure of the fan assembly according to an embodiment of the present application;

FIG. 7 shows a schematic diagram of a sound source intensity simulation of a volute of a fan assembly according to an embodiment of the present application;

Fig. 8 shows a schematic structural diagram of a range hood according to an embodiment of the present application.

Wherein, the corresponding relationship between reference numerals and component names in Fig. 1 to Fig. 8 is:

100 fan assembly,

110 volute, 111 accommodation cavity, 112 first muffler port, 113 air outlet, 114 enclosure, 115 first side plate, 116 second side plate, 117 air inlet,

110a first volute portion, 110b second volute portion, 110c third volute portion, 110d fourth volute portion,

120 wind wheels,

130 housing, 130a sub-shell, 131 avoidance part,

140 noise reduction cavity, 140a sub-cavity, 141 first cavity, 142 second cavity,

150 partition shell, 151 second silencer port,

200 range hood.

detailed description

In order to better understand the above-mentioned purpose, features and advantages of the present application, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

In the following description, many specific details are set forth in order to fully understand the application, but the application can also be implemented in other ways different from those described here, therefore, the protection scope of the application is not limited by the specific details disclosed below. EXAMPLE LIMITATIONS.

The fan assembly 100 and household appliances provided according to some embodiments of the present application are described below with reference to FIGS. 1 to 8 .

According to the first aspect of the present application, as shown in FIG. 1 , FIG. 2 , FIG. 5 and FIG. 8 , a fan assembly 100 is provided, which includes a volute 110 , a wind wheel 120 , a plurality of mufflers, and a casing 130 And the noise reduction cavity 140 , the volute 110 encloses the accommodation cavity 111 . The wind wheel 120 is located in the accommodation cavity 111 . A plurality of first silencing openings 112 are arranged at intervals on the volute 110 , and each first silencing opening 112 communicates with the accommodating cavity 111 . The casing 130 is connected to the volute 110 . The noise reduction chamber 140 is located between the volute 110 and the casing 130, and the noise reduction chamber 140 communicates with the first noise reduction port 112, wherein at least a part of the noise reduction chamber 140 is located on the side of the volute 110 away from the central axis of the wind wheel 120 .

The fan assembly 100 provided by this application includes a volute 110, a wind wheel 120, a plurality of sound-absorbing openings, a housing 130, and a noise reduction chamber 140. The wheel 120 is used as a power source, and when the wind wheel 120 rotates, it can disturb the air flow to realize air supply. A plurality of first silencing openings 112 are arranged at intervals on the volute 110 , and each first silencing opening 112 is communicated with the accommodating cavity 111 . The casing 130 is connected to the volute 110 . Specifically, the casing 130 is disposed on the outer wall of the volute 110 away from the accommodating cavity 111 . The housing 130 and the volute 110 form a noise reduction cavity 140 , and the noise reduction cavity 140 communicates with the accommodation cavity 111 through the first noise reduction opening 112 . The fan assembly 100 in this application includes a volute 110 and a casing 130 arranged in multiple layers, a plurality of first noise reduction openings 112 arranged on the volute 110 , and a noise reduction cavity between the volute 110 and the casing 130 140, the two together form a resonance noise reduction system, the first noise reduction port 112 and the noise reduction cavity 140 are facing the wind wheel 120, and the wind wheel 120 is an aerodynamic noise source, so that the sound absorption effect of the fan assembly 100 can be significantly improved.

It should be noted that the resonance noise reduction system formed by the volute 110 and the casing 130 proposed in this application has little influence on the aerodynamic performance of the wind wheel 120, and because the noise reduction surface of the resonance noise reduction system is close to the aerodynamic noise source, So as to achieve better sound absorption and noise reduction effect. At the same time, it also has the advantages of strong adaptability, simple structure, and low cost. On the basis of the original volute structure, it only needs to add an additional casing 130 and the first noise reduction port 112 .

Further, it is conceivable that since the wind wheel 120 has a central axis, the axial direction, circumferential direction and radial direction of the fan assembly 100 are all defined. A part of the volute 110 , the noise reduction cavity 140 and the casing 130 are arranged radially from inside to outside. That is to say, at least a part of the noise reduction cavity 140 is located on the side of the volute 110 away from the central axis. During the operation of the wind wheel 120, noise can enter the noise reduction cavity 140 from the accommodation cavity 111 through the first noise reduction port 112. .

Further, the casing 130 is surrounded by the outer peripheral wall of the volute 110, that is, the side of the outer peripheral wall of the volute 110 away from the central axis has a noise reduction cavity 140, and the noise reduction cavity 140 can reduce the noise at any position. Resonance noise reduction, the effect is better. It should be noted that a part of the noise reduction cavity 140 can also be located on the axial side of the volute 110, that is to say, the casing 130 fully wraps the volute 110 in the circumferential and axial directions. Further increasing the volume of the noise reduction cavity 140 is beneficial to the noise reduction effect.

Further, the casing 130 includes at least one sub-case 130a, and the at least one sub-case 130a is disposed on the volute 110 . The noise reducing cavity 140 includes at least one sub-cavity 140a, and one sub-cavity 140a is located between one sub-casing 130a and the volute 110 .

In this embodiment, considering the production cost, the limitation of the installation space of the fan assembly 100 in the whole machine, etc., the casing 130 cannot be completely covered on the outer peripheral wall of the volute 110. At this time, the casing 130 includes At least one sub-casing 130a, a sub-casing 130a is arranged on the volute 110 at the place where the noise source intensity is maximum, that is to say, a sub-casing 130a partially wraps the outer peripheral wall of the volute 110 to realize the noise sound at this place. Effective sound absorption of the source.

Specifically, when the housing 130 includes multiple sub-casings 130a, the multiple sub-casings 130a and the volute 110 respectively form multiple sub-cavities 140a, and the multiple sub-cavities 140a are independent of each other and do not affect each other. Resonance cancellation.

Further, the number of sub-casings 130a can also be multiple, and the multiple sub-casings 130a can be arranged respectively according to the strength of the noise source, from strong to weak, that is to say, multiple sub-casings 130a can be set according to priority, and some volutes When the intensity of the corresponding noise source generated at 110 is relatively high, a sub-housing 130a may be provided at this position first.

Specifically, as shown in FIG. 3a and FIG. 3b, the volute 110 includes a first volute portion 110a, a second volute portion 110b, a third volute portion 110c and a fourth volute portion 110d, respectively corresponding to noise sources The intensity gradually decreases. When the number of sub-cases 130a is limited, the first volute part 110a is given priority, followed by the second volute part 110b, the third volute part 110c and the fourth volute part 110d. Ideally, the casing 130 is fully enclosed on the outer peripheral wall of the volute 110 .

Further, as shown in Fig. 3a and Fig. 3b, the volute 110 includes an air outlet 113, and the air outlet 113 communicates with the accommodating cavity 111; the central axis of the wind wheel 120 includes a center point located on the axial end surface of the volute 110; The casing 110 includes a first volute portion 110a, the outer peripheral wall of the first volute portion 110a includes a first line segment located on the axial end surface, and the line between the first end point and the center point of the first line segment is a reference The line segment, the reference line segment is parallel to the plane where the air outlet 113 is located; the angle α1 between the line between the second end point and the center point of the first line segment and the reference line segment satisfies: 0°<α1≤50°; at least one The sub-case 130a includes a first case provided on at least a part of the first volute part 110a.

In this embodiment, the volute 110 includes an air outlet 113 , and the air outlet 113 communicates with the accommodating cavity 111 . The central axis of the wind wheel 120 is the rotation center line of the wind wheel 120 . Taking the wind wheel 120 as a reference, the axial direction, radial direction and circumferential direction are defined for the fan assembly 100 as a whole. Taking an axial end surface of the volute 110 as a reference plane, the central axis of the wind wheel 120 includes a center point in the reference plane. The volute 110 includes a first volute part 110a, and the outer peripheral wall of the first volute part 110a is the wall surface of the first volute part 110a away from the central axis. The outer peripheral wall of the first volute portion 110a includes a first line segment located on the aforementioned reference plane. The specific expression form of the first line segment is associated with the outer contour shape of the first volute part 110a. If the outer contour of the first volute portion 110a is arc-shaped, the first line segment is an arc segment. If the outer contour shape of the first volute portion 110a is a plane, the first line segment is a straight line segment. No matter what type of line segment the first line segment belongs to, the first line segment includes two endpoints, the line between the first end point and the center point of the first line segment is the reference line segment L0, and the reference line segment and the air outlet 113 are located The planes are parallel. It is worth noting that the plane where the air outlet 113 is located is a plane extending in the axial direction. The connection between the second end point and the center point of the first line segment is the first connection line L1, and the angle between the first connection line L1 and the reference line segment L0 satisfies the above range, based on fluid dynamics simulation and broadband noise model, Then obtain the specific position of the first volute part 110a, the first volute part 110a is the place where the intensity of the noise source is maximum, that is, the first priority position, the casing 130 includes the first casing, and the first casing is located at At least a part of the first volute portion 110a, so as to ensure effective noise reduction at the place with the largest noise.

It should be noted that the x-axis is the straight line where the reference line segment is located, the reference line segment is located in the positive direction of the x-axis, and the y-axis is obtained with the center point as the origin, and then the coordinate system is established. The first line segment corresponding to the first volute portion 110a is located in the first quadrant.

Further, as shown in FIG. 3a and FIG. 3b, the volute 110 includes a second volute portion 110b, the outer peripheral wall of the second volute portion 110b includes a second line segment located on the axial end surface, and any point on the second line segment is in line with the center The angle α2 between the connecting line between the points and the reference line segment satisfies: 70°≤α2≤125°. The at least one sub-housing 130a further includes: a second casing disposed on at least a part of the second volute portion 110b.

In this embodiment, the volute 110 includes a second volute portion 110b, and the outer peripheral wall of the second volute portion 110b is the wall surface of the second volute portion 110b away from the central axis. The outer peripheral wall of the second volute portion 110b includes a second line segment located on the aforementioned reference plane. The specific expression form of the second line segment is associated with the outer contour shape of the second volute part 110b. If the outer contour of the second volute portion 110b is arc-shaped, the second line segment is an arc segment. If the outer contour shape of the second volute portion 110b is a plane, the second line segment is a straight line segment. No matter what type of line segment the second line segment belongs to, the second line segment includes two endpoints, the line between the first end point of the second line segment and the center point is L21, and the line between the second end point of the second line segment and the center point The connection line is L22, and the angle formed between the connection line L21 and the connection line L22 and the reference line segment L0 is the endpoint value of the above-mentioned range. Based on the fluid dynamics simulation and the broadband noise model, the specific parameters of the second volute part 110b can be obtained position, the second volute part 110b is the place where the intensity of the noise source is relatively high, that is, the second priority position, the casing 130 also includes a second casing, and the second casing is arranged on at least a part of the second volute part 110b , so as to ensure effective noise reduction for the louder noise of the second priority. It should be noted that a part of the second line segment corresponding to the second volute part 110b is located in the first quadrant, and the other part is located in the second quadrant.

Further, as shown in FIG. 3a and FIG. 3b, the volute 110 includes a third volute portion 110c, the outer peripheral wall of the third volute portion 110c includes a third line segment located on the axial end surface, and any point on the third line segment and the center The angle α3 between the connecting line between the points and the reference line segment satisfies: 125°<α3≤180°; at least one sub-housing 130a also includes: a third casing, and the third casing is arranged on the third volute part at least a portion of 110c.

In this embodiment, the volute 110 includes a third volute portion 110c, and the outer peripheral wall of the third volute portion 110c is the wall surface of the third volute portion 110c away from the central axis. The outer peripheral wall of the third volute portion 110c includes a third line segment located on the aforementioned reference plane. The specific expression form of the third line segment is associated with the outer contour shape of the third volute part 110c. If the outer contour of the third volute portion 110c is arc-shaped, the third line segment is an arc segment. If the outer contour shape of the third volute portion 110c is a plane, the third line segment is a straight line segment. No matter what type of line segment the third line segment belongs to, the third line segment includes two endpoints, the line between the first end point of the third line segment and the center point is L31, and the line between the second end point of the third line segment and the center point The connection line is L32, and the angle formed between the connection line L31 and the connection line L32 and the reference line segment L0 is the endpoint value of the above-mentioned range. Based on the fluid dynamics simulation and the broadband noise model, the specific parameters of the third volute part 110c can be obtained. position, the third volute part 110c is the place where the intensity of the noise source is slightly greater, that is, the third priority position, the casing 130 also includes a third casing, and the third casing is arranged on at least a part of the third volute part 110c to ensure effective muffler for the slightly loud noise of the third priority. It should be noted that the third line segment corresponding to the third volute portion 110c is located in the second quadrant.

Further, as shown in FIG. 3a and FIG. 3b, the volute 110 includes a fourth volute portion 110d, the outer peripheral wall of the fourth volute portion 110d includes a fourth line segment located on the axial end surface, and any point on the fourth line segment is connected to the center The angle α4 between the connecting line between the points and the reverse extension line of the reference line segment satisfies: 0°<α4≤65°; at least one sub-shell 130a also includes: a fourth shell, the fourth shell is set at At least a portion of the fourth volute portion 110d.

In this embodiment, the volute 110 includes a fourth volute portion 110d, and the peripheral wall of the fourth volute portion 110d is the wall surface of the fourth volute portion 110d away from the central axis. The outer peripheral wall of the fourth volute portion 110d includes a fourth line segment located on the aforementioned reference plane. The specific expression form of the fourth line segment is associated with the outer contour shape of the fourth volute part 110d. If the outer contour of the fourth volute portion 110d is arc-shaped, the fourth line segment is an arc segment. If the outer contour shape of the fourth volute portion 110d is a plane, the fourth line segment is a straight line segment. No matter what type of line segment the fourth line segment belongs to, the fourth line segment includes two endpoints, the line between the first end point of the fourth line segment and the center point is L41, and the line between the second end point of the third line segment and the center point The connection line is L42, and the angle formed between the connection line L41 and the connection line L42 and the reverse extension line L0' of the reference line segment L0 is the endpoint value of the above range. Based on the fluid dynamics simulation and the broadband noise model, the first The specific position of the four volute parts 110d, the fourth volute part 110d is the place where the noise source intensity is slightly greater, that is, the third priority position, and the housing 130 also includes a fourth housing, which is located at the fourth At least a part of the volute portion 110d, so as to ensure effective noise reduction for the fourth priority noise. It should be noted that the fourth line segment corresponding to the fourth volute portion 110d is located in the third quadrant.

It should be noted that, for the third volute part 110c and the fourth volute part 110d, the intensity of the noise source formed at the two positions is basically the same. When the number of sub-cases 130a is three, the first two Preferably, it is arranged at the first volute part 110a and the second volute part 110b, and the last sub-case 130a can be optionally arranged on the third volute part 110c or the fourth volute part 110d. Or limited by the installation space, a part of the sub-case 130a can be provided on the third volute part 110c, and another part of the sub-case 130a can be provided on the fourth volute part 110d.

Further, the fan assembly 100 further includes a partition case 150 disposed on the volute 110 and/or the casing 130 , and the partition case 150 is located in the noise reduction chamber 140 . Wherein, part of the noise reduction cavity 140 between the partition shell 150 and the volute 110 is the first cavity 141; part of the noise reduction cavity 140 between the partition shell 150 and the housing 130 is the second cavity 142, the first The cavity 141 communicates with the second cavity 142 .

In this embodiment, the noise reduction cavity 140 located between the housing 130 and the volute 110 includes at least two communicating cavities along the radial direction, which can be combined with the first noise reduction port 112 to form a better resonance noise reduction system. When the noise enters the noise reduction cavity 140 through the first noise reduction opening 112, further resonance occurs in at least two connected cavities to achieve the noise reduction effect. The volute 110, the partition case 150 and the casing 130 form a three-layer resonance structure, and the volute 110 and the casing 130 form a double-layer resonance structure. The three-layer resonance structure retains the high sound absorption coefficient at the design frequency of the double-layer resonance structure. , It can also achieve the effect of high sound absorption coefficient in the higher frequency band.

Specifically, the fan assembly 100 includes a partition case 150, and the number of the partition case 150 is at least one. The partition shell 150 can divide the noise reduction chamber 140 into a first cavity 141 and a second cavity 142, wherein the first cavity 141 is located between the partition shell 150 and the volute 110, and the second cavity 142 is located in the partition shell 150 Between the housing 130 , that is to say, in the radial direction from inside to outside, the accommodating cavity 111 , the first muffler port 112 , the first cavity 141 and the second cavity 142 are arranged in sequence.

It should be noted that the specific setting position of the partition case 150 includes various embodiments. For example, the partition case 150 can be provided on the volute 110, and the partition case 150 can also be provided on the casing 130. Of course, the partition case 150 can also be It is connected with the volute 110 and the housing 130 at the same time.

In a specific embodiment, as shown in FIG. 5 , the fan assembly 100 further includes a plurality of second silencing openings 151 , and the plurality of second silencing openings 151 are provided on the partition shell 150 at intervals.

In this embodiment, the fan assembly 100 also includes a plurality of second silencing openings 151, which are spaced apart on the partition shell 150, and the first cavity 141 and the second cavity 142 pass through the plurality of second silencing openings. The muffler port 151 realizes communication.

Specifically, each of the plurality of second silencing openings 151 is a circular hole, and the diameter of the circular hole is greater than or equal to 0.6 mm and less than or equal to 2 mm. Further, the plurality of second noise reduction openings 151 may be distributed according to certain characteristics, such as rectangular distribution, triangular distribution, rhombus distribution, polygonal distribution and so on.

Further, the sum of the areas of the plurality of second mufflers 151 is S1, and the area of the inner surface of the partition is S2, satisfying 0.2%≤S1/S2≤0.6%.

In a specific embodiment, as shown in FIG. 6, the first end of the partition shell 150 is connected to the housing 130, and there is a gap between the second end of the partition shell 150 and the housing 130, and the first cavity 141 passes through the gap. communicate with the second cavity 142 .

In this embodiment, the first end of the partition shell 150 is connected to the casing 130 , there is a gap between the second end of the partition shell 150 and the casing 130 , and the first cavity 141 communicates with the second cavity 142 through the gap. That is to say, no perforation design is made on the partition shell 150, but a gap of a certain width is reserved between the housing 130 and the second cavity 142 can be regarded as an extension of the first cavity 141. It is equivalent to deepening the depth of the first sound-absorbing opening 112 in the volute 110 as the sound-absorbing structure, which is beneficial to the sound-absorbing of low-frequency noise. In a specific implementation, the minimum distance between the second end of the partition shell 150 and the housing 130 is the width of the gap, the width W0 of the gap, the radial width of the first cavity 141W1, the diameter of the second cavity 142W2 approximately equal in width. For example: W0=W1=W2, or, W0±a=W1±a=W2±a, where a is the processing error value.

Further, the radial width W of the noise reduction cavity 140 satisfies: 8mm≤W≤25mm.

In this embodiment, the radial width W of the noise reduction cavity 140 satisfies: 8mm≤W≤25mm. When the noise reduction cavity 140 includes the first cavity 141 and the second cavity 142, the radial width of the first cavity 141 The width W1 and the radial width W2 of the second cavity 142 satisfy: 8mm≤W1+W2≤25mm.

It should be noted that the noise reduction cavity 140 includes different cavity segments along the circumferential direction, and the radial widths of different cavity segments may or may not be equal.

Specifically, when the noise reduction cavity 140 includes a first cavity segment and a second cavity segment, and when the radial width of the first cavity segment is different from the radial width of the second cavity segment, then part of the volute corresponding to the first cavity segment The arrangement and structural size of the first muffler ports 112 on 110 will also be different.

For example, when the radial width of the first cavity segment is smaller than the radial width of the second cavity segment, the diameter of the first muffler port 112 on the part of the volute 110 corresponding to the first cavity segment is the first diameter, and the diameter of the first muffler opening 112 located in the part of the volute The distance between two adjacent first silencers 112 on the shell 110 is the first distance. Similarly, for the second cavity segment, the diameter of the first silencing opening 112 on the corresponding part of the volute 110 is the second diameter, and the distance between two adjacent first silencing openings 112 is the second distance . At this time, the first diameter is greater than the second diameter, and the first distance is greater than the second distance, so as to compensate for the weakening of the sound absorption effect due to the reduction of the radial width of the first chamber segment.

That is to say, the radial depth of the noise reduction cavity 140 is related to the corresponding structural parameters of the first noise reduction opening 112, so that a resonance noise reduction system compatible with the aerodynamic noise source can be formed in combination.

Further, the plurality of first sound-absorbing openings 112 are circular sound-absorbing holes, and the diameter d of the sound-absorbing circular holes satisfies: 0.5mm≤d≤2mm.

In this embodiment, the plurality of first silencing openings 112 are circular sound-absorbing holes, that is, each first silencing opening 112 is a circular sound-absorbing hole, and the inner wall of the silencing circular hole is a smooth curved surface. The diameter d of the sound-absorbing circular hole satisfies: 0.5mm≤d≤2mm.

Further, on the basis of the embodiment shown in FIG. 2 , as shown in FIG. 1 , the volute 110 may also include a shroud 114 in addition to the first side plate 115 and the second side plate 116 . For example, the surrounding board 114 may be a bent board, and the first side board 115 and the second side board 116 may be straight boards. The first side plate 115 and the second side plate 116 are arranged on both sides of the surrounding plate 114 and enclose with the casing 130 to form a cavity. A plurality of first mufflers 112 are disposed on the surrounding board 114 , and the housing 130 is disposed on the surrounding board 114 . The first side plate 115 is disposed on one axial side of the surrounding plate 114 . The second side plate 116 is disposed on the other side of the surrounding plate 114 in the axial direction. The air inlet 117 communicates with the accommodating cavity 111 , and the air inlet 117 is disposed on the first side plate 115 and/or the second side plate 116 .

In this embodiment, the noise reduction cavity 140 is located between the enclosure 114 and the housing 130 . The number of the air inlet 117 is one or two, and when the number of the air inlet 117 is one, it is the single suction fan assembly 100 . If the number of air inlets 117 is two, it is a double suction fan assembly 100 .

Further, the sum of the areas of the multiple first mufflers 112 is S1, and the inner surface of the surrounding plate 114 is S2, satisfying 0.2%≦S1/S2≦0.6%.

In this embodiment, the relationship between the plurality of first silencing openings 112 and the inner surface of the shroud 114 satisfies the above-mentioned range, while reducing noise and forming a resonance silencing system, it can also ensure the stability of the volute 110. overall structural strength.

Further, the thickness T of the enclosure 114 satisfies: 0.6mm≤T≤1.2mm.

In this embodiment, the thickness of the shroud 114 satisfies the above range. On the one hand, it can ensure the overall structural strength of the volute 110, and on the other hand, it can also provide a suitable setting position for the first muffler port 112. The thickness of the shroud 114 is equivalent to The depth of the first noise reduction opening 112 is conducive to forming a resonance noise reduction system with excellent noise reduction effect.

Further, a part of the housing 130 is recessed toward the interior of the noise reduction cavity 140 to form the escape portion 131 .

In this embodiment, a part of the casing 130 is recessed toward the interior of the noise reduction cavity 140 to form a avoidance portion 131 , and the setting of the avoidance portion 131 will reduce the radial direction of a part of the noise reduction cavity 140 between this part and the volute 110 . At the same time, it is necessary to increase the diameter of the first silencing opening 112 on the corresponding part of the volute 110 and the distance between two adjacent first silencing openings 112 .

It should be noted that the setting of the avoidance part 131 can facilitate the installation of the fan assembly 100 in the complete machine, and the corresponding setting of the avoidance part 131 at the position where avoidance is required can make the outer contour shape of the fan assembly 100 more flexible, thereby adapting to Different machine installation requirements.

In a specific embodiment, the fan assembly 100 includes a volute 110 , a wind wheel 120 , a plurality of noise reduction openings, a casing 130 and a noise reduction chamber 140 , and the volute 110 encloses an accommodating chamber 111 . The wind wheel 120 is located in the accommodation cavity 111 . A plurality of first silencing openings 112 are arranged at intervals on the volute 110 , and each first silencing opening 112 communicates with the accommodating cavity 111 . The casing 130 is disposed on the volute 110 . The noise reduction chamber 140 is located between the volute 110 and the casing 130, and the noise reduction chamber 140 communicates with the first noise reduction port 112, wherein at least a part of the noise reduction chamber 140 is located on the side of the volute 110 away from the central axis of the wind wheel 120 .

The fan assembly 100 provided by this application includes a volute 110, a wind wheel 120, a plurality of sound-absorbing openings, a casing 130 and a noise reduction chamber 140. The volute 110 encloses a housing chamber 111, and the wind wheel 120 is arranged in the housing chamber 111. The wheel 120 is used as a power source, and when the wind wheel 120 rotates, it can disturb the air flow to realize air supply. A plurality of first silencing openings 112 are arranged at intervals on the volute 110 , and each first silencing opening 112 is communicated with the accommodating cavity 111 . The casing 130 is disposed on the volute 110 . Specifically, the casing 130 is disposed on the outer wall of the volute 110 away from the accommodating cavity 111 . The housing 130 and the volute 110 form a noise reduction cavity 140 , and the noise reduction cavity 140 communicates with the accommodation cavity 111 through the first noise reduction opening 112 . The fan assembly 100 in this application includes a volute 110 and a housing 130 arranged in multiple layers, a plurality of first noise reduction openings 112 arranged on the volute 110 , and a noise reduction cavity between the volute 110 and the housing 130 140, the two together form a resonance noise reduction system, the first noise reduction port 112 and the noise reduction cavity 140 are facing the wind wheel 120, and the wind wheel 120 is an aerodynamic noise source, so that the sound absorption effect of the fan assembly 100 can be significantly improved.

Further, it is conceivable that since the wind wheel 120 has a central axis, the axial direction, circumferential direction and radial direction of the fan assembly 100 are all defined. A part of the volute 110 , the noise reduction cavity 140 and the casing 130 are arranged radially from inside to outside. That is to say, at least a part of the noise reduction cavity 140 is located on the side of the volute 110 away from the central axis. During the operation of the wind wheel 120 , noise can enter the noise reduction cavity 140 from the accommodation cavity 111 through the first noise reduction opening 112 .

Further, the volute 110 includes an air outlet 113, and the air outlet 113 communicates with the accommodating cavity 111; the central axis of the wind wheel 120 includes a center point located on the axial end surface of the volute 110; the volute 110 includes a first volute portion 110a , the outer peripheral wall of the first volute part 110a includes a first line segment located on the axial end surface, the line connecting the first end point and the center point of the first line segment is a reference line segment, and the reference line segment and the air outlet 113 are located The planes are parallel; the line between the second end point of the first line segment and the center point, and the angle α1 between the reference line segment and the reference line segment meet: 0°<α1≤50°; at least one sub-shell 130a includes the first shell, The first housing is provided on at least a portion of the first volute portion 110a.

Further, the volute 110 includes a second volute portion 110b, the outer peripheral wall of the second volute portion 110b includes a second line segment located on the axial end surface, the line between any point on the second line segment and the center point, and the reference The angle α2 between the line segments satisfies: 70°≤α2≤125°. The at least one sub-housing 130a further includes: a second casing disposed on at least a part of the second volute portion 110b.

Further, the volute 110 includes a third volute portion 110c, the outer peripheral wall of the third volute portion 110c includes a third line segment located on the axial end surface, the line between any point on the third line segment and the center point, and the reference The included angle α3 between the line segments satisfies: 125°<α3≦180°; at least one sub-housing 130a further includes: a third casing, the third casing is provided on at least a part of the third volute portion 110c.

Further, the volute 110 includes a fourth volute portion 110d, the outer peripheral wall of the fourth volute portion 110d includes a fourth line segment located on the axial end surface, the line between any point on the fourth line segment and the center point, and the reference The included angle α4 between the opposite extension lines of the line segment satisfies: 0°<α4≤65°; at least one sub-housing 130a also includes: a fourth casing, the fourth casing is arranged on at least a part of the fourth volute part 110d superior.

According to the second aspect of the present application, as shown in FIG. 7 and FIG. 8 , a household electrical appliance is provided, including the fan assembly 100 provided by any of the above-mentioned designs.

The household electrical appliances provided by the present application include the fan assembly 100 provided by any of the above-mentioned designs, and therefore have all the beneficial effects of the fan assembly 100 , which will not be repeated here.

It is conceivable that the home appliances include the range hood 200, an air conditioner, and the like.

Specifically, the wind wheel 120 in the fan assembly 100 is a centrifugal wind wheel 120 , and the aerodynamic noise generated by the centrifugal wind wheel 120 is the main noise source of the range hood 200 . By improving the structure of the fan assembly 100, the noise of the range hood 200 can be reduced, and the comfort of the kitchen environment can be greatly improved.

Wherein, the fan assembly 100 includes a volute 110 , a wind wheel 120 , a plurality of mufflers, a casing 130 and a noise reduction chamber 140 , and the volute 110 encloses a housing chamber 111 . The wind wheel 120 is located in the accommodation cavity 111 . A plurality of first silencing openings 112 are arranged at intervals on the volute 110 , and each first silencing opening 112 communicates with the accommodating cavity 111 . The casing 130 is disposed on the volute 110 . The noise reduction chamber 140 is located between the volute 110 and the casing 130, and the noise reduction chamber 140 communicates with the first noise reduction port 112, wherein at least a part of the noise reduction chamber 140 is located on the side of the volute 110 away from the central axis of the wind wheel 120 .

The fan assembly 100 provided by this application includes a volute 110, a wind wheel 120, a plurality of sound-absorbing openings, a housing 130, and a noise reduction chamber 140. The wheel 120 is used as a power source, and when the wind wheel 120 rotates, it can disturb the air flow to realize air supply. A plurality of first silencing openings 112 are arranged at intervals on the volute 110 , and each first silencing opening 112 is communicated with the accommodating cavity 111 . The casing 130 is disposed on the volute 110 . Specifically, the casing 130 is disposed on the outer wall of the volute 110 away from the accommodating cavity 111 . The housing 130 and the volute 110 form a noise reduction cavity 140 , and the noise reduction cavity 140 communicates with the accommodation cavity 111 through the first noise reduction opening 112 . The fan assembly 100 in this application includes a volute 110 and a housing 130 arranged in multiple layers, a plurality of first noise reduction openings 112 arranged on the volute 110 , and a noise reduction cavity between the volute 110 and the housing 130 140, the two together form a resonance noise reduction system, the first noise reduction port 112 and the noise reduction cavity 140 are facing the wind wheel 120, and the wind wheel 120 is an aerodynamic noise source, so that the sound absorption effect of the fan assembly 100 can be significantly improved. According to the test results, the noise reduction effect of the fan assembly 100 can reach more than 6dB, and contribute more than 1dB to the overall noise reduction of household electrical appliances.

In this application, the term "plurality" means two or more, unless otherwise clearly defined. The terms "installation", "connection", "connection", "fixed" and other terms should be interpreted in a broad sense, for example, "connection" can be fixed connection, detachable connection, or integral connection; "connection" can be directly or indirectly through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in this application according to specific situations.

In the description of this specification, descriptions of the terms "one embodiment", "some embodiments", "specific embodiments" and the like mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in this application In at least one embodiment or example of . In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above descriptions are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, there may be various modifications and changes in the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the protection scope of this application.

Claims

A fan assembly, including:

a volute, the volute enclosing an accommodation chamber;

a wind wheel, the wind wheel is located in the accommodating cavity;

A plurality of first silencing ports, a plurality of the first silencing ports are arranged at intervals on the volute, and each of the first silencing ports communicates with the accommodating cavity;

a casing connected to the volute;

A noise reduction cavity, located between the volute and the casing, the noise reduction cavity communicates with the first noise reduction port, wherein,

At least a part of the noise reduction cavity is located on a side of the volute away from the central axis of the wind wheel.
The fan assembly of claim 1, wherein said housing comprises:

at least one sub-casing, at least one of said sub-casings is arranged on said volute;

The noise reduction cavity includes at least one sub-cavity, and one sub-cavity is located between one of the sub-casings and the volute.
The fan assembly of claim 2, wherein:

The volute includes an air outlet, and the air outlet communicates with the accommodating cavity;

The central axis of the wind wheel includes a center point located on the axial end surface of the volute;

The volute includes a first volute portion, the outer peripheral wall of the first volute portion includes a first line segment located on the axial end surface, the first end point of the first line segment and the center The connecting line between the points is a reference line segment, and the reference line segment is parallel to the plane where the air outlet is located;

The included angle α1 between the line connecting the second end point of the first line segment and the central point and the reference line segment satisfies: 0°<α1≤50°;

The at least one subshell includes:

The first casing is provided on at least a part of the first volute part.
The fan assembly of claim 3, wherein:

The volute includes a second volute portion, the outer peripheral wall of the second volute portion includes a second line segment located on the axial end surface, and a connection between any point on the second line segment and the central point The angle α2 between the line and the reference line segment satisfies: 70°≤α2≤125°;

The at least one subshell also includes:

The second casing is provided on at least a part of the second volute part.
A fan assembly according to claim 3 or 4, wherein:

The volute includes a third volute portion, the outer peripheral wall of the third volute portion includes a third line segment located on the axial end surface, and a connection between any point on the third line segment and the central point The angle α3 between the line and the reference line segment satisfies: 125°<3≤180°;

The at least one subshell also includes:

A third housing provided on at least a part of the third volute portion.
A fan assembly according to any one of claims 3 to 5, wherein:

The volute includes a fourth volute portion, the outer peripheral wall of the fourth volute portion includes a fourth line segment on the axial end surface, and a connection between any point on the fourth line segment and the central point The angle α4 between the line and the reverse extension line of the reference line segment satisfies: 0°<α4≤65°;

The at least one subshell also includes:

A fourth casing is provided on at least a part of the fourth volute portion.
The fan assembly according to any one of claims 1 to 6, wherein the fan assembly further comprises:

A partition case, the partition case is arranged on the volute and/or the casing, and the partition case is located in the noise reduction chamber; wherein,

The part of the noise reduction cavity located between the partition shell and the volute is a first cavity;

A part of the noise reduction chamber located between the partition shell and the housing is a second chamber, and the first chamber communicates with the second chamber.
The fan assembly according to claim 7, wherein the fan assembly further comprises:

A plurality of second mufflers are set at intervals on the partition shell.
A fan assembly according to claim 7 or 8, wherein:

The first end of the partition shell is connected to the housing, there is a gap between the second end of the partition shell and the housing, and the first cavity is connected to the second cavity through the gap. connected.
A fan assembly according to any one of claims 1 to 9, wherein:

The radial width W of the noise reduction cavity satisfies: 8mm≤W≤25mm.
A fan assembly according to any one of claims 1 to 10, wherein:

The plurality of first sound-absorbing openings are sound-absorbing circular holes, and the diameter d of the sound-absorbing circular holes satisfies: 0.5mm≤d≤2mm.
The fan assembly according to any one of claims 1 to 11, wherein the volute comprises:

A shroud, a plurality of the first mufflers are arranged on the shroud, and the housing is arranged on the shroud;

The first side plate is arranged on one side of the axial direction of the surrounding plate;

The second side plate is arranged on the other axial side of the surrounding plate;

The air inlet communicates with the accommodating cavity, and the air inlet is arranged on the first side plate and/or the second side plate.
The fan assembly of claim 12, wherein:

The sum of the areas of the multiple first mufflers is S1, and the inner surface of the shroud is S2, satisfying 0.2%≤S1/S2≤0.6%.
A fan assembly according to claim 12 or 13, wherein:

The thickness T of the shroud satisfies: 0.6mm≤T≤1.2mm.
A fan assembly according to any one of claims 1 to 14, wherein:

A part of the housing is recessed toward the interior of the noise reduction cavity to form a evacuation portion.
A household electrical appliance, comprising: the fan assembly according to any one of claims 1-15.