CN110118203A - A kind of noise reduction components - Google Patents

Abstract

The invention discloses a kind of noise reduction components and use the electrical installation of the noise reduction components.The noise reduction components include: a shell (1), with the cavity (2) being located in the shell (1), the cavity (2) includes entrance (3), outlet (4) and is located at the entrance (3) and exports the expansion chamber (5) between (4), the sectional area at any one place of the expansion chamber (5) is greater than the sectional area of the entrance (3), the sectional area of the outlet (4) is greater than or equal to the sectional area of the entrance (3), and the sectional area is the sectional area of cavity (2) perpendicular to airflow direction.The noise reduction components can effectively reduce the noise of electrical installation.

Description

A noise reduction component

technical field

The invention belongs to the technical field of household electrical appliances, and in particular relates to a noise reduction component and an electrical device.

Background technique

At present, people pay more and more attention to the noise of household appliances in home life. In order to improve the quality of life, people generally hope that the noise of household appliances should be as small as possible. Due to the specific requirements of the working environment of the sweeping robot, how to reduce the fan noise generated by the high-speed fan of the sweeping robot is the focus and difficulty in the design of the sweeping robot, so there has been no effective way to reduce its noise. When the motor of the sweeping robot fan runs at high speed (nearly 6000r/min), the combination of air and dust (or some other tiny garbage) is sucked into the filter system through the fan, and then exhausted at high speed, the high-speed flow of airflow will generate high air noise.

Patent application CN105212833 discloses a robot vacuum cleaner with a music playing function, which plays specific music through a speaker to mask the noise of the fan, but does not substantially reduce the noise of the fan.

At present, there is an urgent need for a method for effectively reducing the noise of the sweeping robot, which fundamentally solves the troubles caused by noise to users, thereby improving their quality of life.

Contents of the invention

As an aspect of the present invention, an embodiment of the present invention provides a noise reduction assembly, including: a housing, and a cavity located in the housing, the cavity includes an inlet, an outlet, and a Between the expansion chamber, the cross-sectional area of any part of the expansion chamber is greater than the cross-sectional area of the inlet, the cross-sectional area of the outlet is greater than or equal to the cross-sectional area of the inlet, and the cross-sectional area is that the chamber is perpendicular to the air flow The inner cross-sectional area of the direction.

In the noise reduction assembly of the embodiment of the present invention, when the sound wave enters the expansion cavity with a large inner cross-sectional area through the inlet, the effect of "resistance" noise reduction is achieved, the noise is reduced, and the function of noise reduction is realized.

As another aspect of the present invention, an embodiment of the present invention provides a household appliance, including a fan and the above-mentioned noise reduction component, and the noise reduction component is connected to an outlet of the fan.

The household appliance of the embodiment of the present invention adds a specially designed noise reduction component, so that the airflow from the fan passes through the noise reduction component and undergoes a process of "resistance" or even "resistance" noise reduction, so that the noise of the household appliance has been reduced to a certain extent.

Description of drawings

FIG. 1 is a schematic diagram of a noise reduction component connected to a fan according to an embodiment of the present invention;

Fig. 2 is a schematic cross-sectional structure diagram of a longitudinal section of a noise reduction assembly along the airflow direction according to another embodiment of the present invention;

Fig. 3 is a schematic cross-sectional structure diagram of a longitudinal section along the airflow direction of a noise reduction assembly according to another embodiment of the present invention;

Fig. 4 is a schematic cross-sectional structure diagram of a longitudinal section of the noise reduction assembly along the airflow direction according to an embodiment of the present invention;

Wherein, reference sign is:

1. Shell, 2. Cavity, 3. Inlet, 4. Outlet, 5. Expansion chamber, 6. Sound-absorbing material, 7. Partition, 8. Fan, 9. Airflow, 10. Fan outlet.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions of the embodiments of the present invention, the embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

Terminology Explanation

In this application, unless otherwise specified, the meanings of each technical term are as follows:

The airflow direction 9 refers to the direction in which the airflow enters the inlet 3 of the noise reduction assembly from the air outlet 10 of the fan when the fan is working, passes through the expansion chamber 5, and finally flows out from the outlet 4 of the noise reduction assembly.

The axial direction refers to the direction of the central axis of a structure with a central axis shape (such as a hollow quadrangular prism or hollow cylinder structure as a whole). In the present invention, the axial direction is the airflow direction.

The cross-sectional area of the inlet, outlet or expansion chamber refers to the cross-sectional area of the cavity at the inlet, outlet or expansion chamber of the noise reduction component along the cross-section perpendicular to the airflow direction,

"A as a whole is B" or "A is basically B", which means that A conforms to characteristic B on a larger scale, but it does not mean that its details must fully conform to characteristic B; for example, A is a cylinder as a whole Indicates that the macroscopic shape of A is a cylinder, but there may be some detailed structures such as grooves and protrusions that are smaller than the overall size of the cylinder.

"A is equal to B" or "A is equivalent to B" means that A and B are roughly equal in size or size, but it does not mean that A and B must be exactly equal.

noise reduction components

An embodiment of the present invention provides a noise reduction component.

As shown in FIG. 1 , the noise reduction assembly of the embodiment of the present invention is connected to the air outlet 10 of the fan, and the inlet 3 of the noise reduction assembly is matched with the air outlet 10 of the fan.

As shown in Figure 2, the noise reduction assembly of the embodiment of the present invention includes: a housing 1, and a cavity 2 located in the housing 1, the cavity 2 includes an inlet 3, an outlet 4, and a housing between the inlet 3 and the outlet 4 Between the expansion chamber 5, the cross-sectional area of any part of the expansion chamber 5 is larger than the cross-sectional area of the inlet 3, and the cross-sectional area of the outlet 4 is greater than or equal to the cross-sectional area of the inlet 3, wherein the cross-sectional area is the cross-sectional area of the chamber 2 perpendicular to the airflow direction area.

Wherein, the outer cross-sectional shapes of the inlet 3, the outlet 4 and the expansion chamber 5 are not particularly limited, and can be circular, elliptical, square, rectangular or other polygonal, as long as they are matched with the fan outlet 10, preferably circular, Squares and rectangles. The inner cross-sectional shapes of the inlet 3, the outlet 4 and the expansion chamber 5 are not particularly limited, and are preferably circular, square and rectangular.

The lengths of the inlet 3 and the outlet 4 are also not particularly limited.

The cross-sectional area of the outlet 4 should be greater than or equal to the cross-sectional area of the inlet 3. When the cross-sectional areas of the inlet 3 and the outlet 4 are equal, the noise reduction effect is better. When the cross-sectional area of the inlet 3 is smaller than that of the outlet 4, the pressure loss between the inlet 3 and the outlet 4 increases, the energy consumption of the fan 8 increases, and the working efficiency of the fan decreases.

The cross-sectional area of the expansion chamber 5 at any point perpendicular to the airflow direction needs to be larger than the cross-sectional area of the inlet 3, and its shape along the airflow direction is not particularly limited. Preferably, it can be a thin middle at both ends as shown in Figure 2 and Figure 3 A thick curved olive shape can also be two opposite curved vertebral bodies sharing the bottom surface, as long as the cross-sectional area of the expansion chamber 5 increases smoothly from the entrance 3 to the maximum, and then gradually decreases to the exit 4. ; As shown in Figure 4, the expansion chamber 5 can also be a curved cylinder, such as a cylinder, a quadrangular prism, a triangular prism, etc., as long as the cross-sectional area of the expansion chamber 5 is guaranteed to be greater than the cross-sectional area of the inlet 3, at this time, The cross-sectional area of the expansion chamber 5 can be basically kept constant, or can be small at both ends and large at the middle. The ratio of the maximum cross-sectional area of the expansion chamber 5 to the inlet 3 is preferably 1.5:1-10:1, more preferably 2:1-4:1.

The expansion chamber 5 is integrally formed, or formed separately from two or more parts along the axial direction, and then the two or more parts are sealed and linked together to form the expansion chamber. Leakage, the sealing connection method can be a common mechanical connection method, such as bonding, riveting or welding. When forming separately, it is convenient to further place the required parts in the expansion cavity.

The inlet 3, the outlet 4 and the expansion chamber 5 can be integrally formed, or can be formed separately as shown in Figure 4. When forming separately, the inlet 3, the outlet 4 and the expansion chamber 5 need to be sealed and connected. After the connection is completed, the Air flow and sound waves will not leak from the connection, and the sealing connection method can be a common mechanical connection method, such as bonding, riveting or welding.

The inlet 3, the outlet 4 and the inner wall of the expansion chamber 5 are partly or completely covered with sound-absorbing material 6, and the method of covering can be any connection method, such as bonding, riveting, welding, buckle or screw connection, as shown in Figure 2 It is shown that all sound-absorbing materials 6 are covered. As shown in Figure 3, only the expansion chamber 5 and the outlet 4 are covered with sound-absorbing materials 6. Figure 4 shows that only the expansion chamber 5 is covered with sound-absorbing materials. The sound-absorbing material 6 can also be pasted locally. The maximum cross-sectional area of the attached sound-absorbing material 6 along the vertical direction of the airflow accounts for no more than 50% of the corresponding cross-sectional area of the expansion chamber 5, preferably 10%-50%, and 50% is optimal. When the sectional area of the sound-absorbing material 6 accounts for more than 50% of the sectional area of the expansion chamber 5, the pressure loss between the inlet 3 and the outlet 4 increases, the energy consumption of the fan 8 increases, and the working efficiency decreases.

The sound-absorbing material 6 can be any sound-absorbing material, such as a porous sound-absorbing material or a fibrous sound-absorbing material, and the porous sound-absorbing material is selected from one or both of the following materials: polyurethane open-cell foam, Aluminum foam; the fibrous sound-absorbing material is selected from one or more of the following materials: polypropylene fiber, polyethylene fiber, a mixture of polyethylene fiber and polypropylene fiber, and glass fiber.

As shown in Figure 3, a partition 7 with a through hole is arranged in the expansion chamber 5 perpendicular to the air flow direction, so that the air can only pass through the through hole, and the area of the through hole is not less than the cross-sectional area of the inlet 3, otherwise To affect the sound absorption effect, the partition 7 and the expansion chamber 5 are integrally formed, or separately formed and sealed and connected by a common mechanical connection method. One end of the sound-absorbing material 6 is arranged at the partition 7, the partition 7 can be used to position the sound-absorbing material 6, and at the same time ensure the structural stability of the sound-absorbing material 6 when it is impacted by the airflow generated by the fan 8, the position of the partition 7 can follow The sound-absorbing material 6 is determined according to the covering amount and the covering method, and it can be located at any position of the expansion chamber 5 in theory.

Electrical device

An embodiment of the present invention provides an electrical device using the above noise reduction component.

As shown in Figure 1, in the electrical device of the embodiment of the present invention, the noise reduction assembly is connected at the outlet of the fan 10. During operation, the airflow 9 and the sound wave enter the inlet 3 of the noise reduction assembly from the outlet of the fan 10, and flow through The expansion cavity 5 and the outlet 4 of the noise reduction assembly finally flow out from the outlet of the electrical device.

The electrical device is a sweeping robot and a vacuum cleaner. The fan is generally a high-speed fan.

As shown in Table 1, it shows the comparison data before and after using the noise reduction component whose ratio of the maximum cross-sectional area of the expansion chamber 5 to the cross-sectional area of the inlet 3 is 2:1, and the front, rear, left, right, Test separately with the last five measuring points. It can be seen that by using the noise reduction component provided by the embodiment of the present invention, the average noise reduction of the sweeping robot is 4.3dB.

Table 1

The present invention provides several preferred implementations of the noise reduction component and the electrical device.

Preferred embodiment 1 is a noise reduction component, comprising:

a housing 1,

and a chamber 2 located in the housing 1, the chamber 2 includes an inlet 3, an outlet 4 and an expansion chamber 5 between the inlet 3 and the outlet 4, and any section of the expansion chamber 5 The area is larger than the cross-sectional area of the inlet 3, the cross-sectional area of the outlet 4 is greater than or equal to the cross-sectional area of the inlet 3, and the cross-sectional area of the inlet 3, the outlet 4 and the expansion chamber 5 is substantially equal to that of the cavity 2 at the corresponding position. The cross-sectional area perpendicular to the direction of airflow.

Preferred embodiment 2 is a noise reduction assembly as described in preferred embodiment 1, the cross-sectional area of the expansion chamber 5 smoothly increases from the end connected to the inlet 3 to the maximum, and then smoothly decreases to the end connected to the outlet. 4 connected to the other end.

Preferred embodiment 3 is a noise reduction assembly as described in preferred embodiment 1 or 2, the cross-sectional area of the expansion chamber 5 directly transitions from the end connected to the inlet 3 to the maximum, and any part of the expansion chamber 5 The cross-sectional area is equivalent, and the other end directly transitions to the cross-sectional area of the outlet 4.

Preferred embodiment 4 is any noise reduction assembly as described in preferred embodiments 1-3, the ratio of the maximum cross-sectional area of the expansion chamber 5 to the cross-sectional area of the inlet 3 is 1.5:1 to 10:1 .

Preferred embodiment 5 is any noise reduction assembly as described in preferred embodiments 1-4, the ratio of the maximum cross-sectional area of the expansion chamber 5 to the cross-sectional area of the inlet 3 is 2:1 to 4:1 .

Preferred embodiment 6 is any noise reduction component as described in preferred embodiments 1-5, the inlet 3, the outlet 4 and the inner wall of the expansion chamber 5 are at least partially coated with sound-absorbing material 6, and the sound-absorbing The ratio of the maximum cross-sectional area of the material 6 along the vertical direction of the airflow to the corresponding cross-sectional area of the expansion cavity 5 is no more than 50%, preferably 10%-50%.

Preferred embodiment 7 is any noise reduction assembly as described in preferred embodiments 1-6. A partition 7 with a through hole is arranged in the expansion chamber 5 along the direction perpendicular to the air flow, so that the air can only pass through the The hole passes through, and the area of the through hole is not smaller than the cross-sectional area of the inlet 3 .

Preferred embodiment 8 is any noise reduction component as described in preferred embodiments 1-7, and the inner walls of the cavity 2 are all covered with sound-absorbing materials 6 .

Preferred embodiment 9 is any noise reduction component as described in preferred embodiment 8, the sound-absorbing material 6 and the inner wall of the expansion cavity 5 are at least partly fixedly bonded together.

Preferred embodiment 10 is any noise reduction component as described in preferred embodiments 6-9, and the sound-absorbing material 6 is selected from one or both of the following materials: porous sound-absorbing materials, fiber-based sound material.

Preferred embodiment 11 is a noise reduction component as described in preferred embodiment 10, and the porous sound-absorbing material is selected from one or both of the following materials: polyurethane open-cell foam and aluminum foam.

Preferred embodiment 12 is a noise reduction component as described in preferred embodiment 10, and the fibrous sound-absorbing material is selected from one or more of the following materials: polypropylene fiber, polyethylene fiber, polyethylene fiber and Blend of polypropylene fibers, glass fibers.

The preferred embodiment 13 is an electrical device, which includes a fan 8 and the noise reduction assembly according to any one of the preferred embodiments 1-12, the noise reduction assembly is connected at the outlet 10 of the fan.

Preferred embodiment 14 is an electrical device as described in preferred embodiment 13, and the electrical device is a sweeping robot or a vacuum cleaner.

It can be understood that, the foregoing implementation manners are only exemplary implementation manners adopted for illustrating the principles of the embodiments of the present invention, but the embodiments of the present invention are not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the embodiments of the present invention, and these modifications and improvements are also regarded as the protection scope of the embodiments of the present invention.

Claims (14)

1. a kind of noise reduction components characterized by comprising

One shell (1),

With the cavity (2) being located in the shell (1), the cavity (2) includes entrance (3), exports (4) and be located at the entrance (3) expansion chamber (5) between outlet (4), the sectional area of the entrance (3), outlet (4) and expansion chamber (5) are corresponding position Cavity (2) in the sectional area for being basically perpendicular to airflow direction, the sectional area at any one place of the expansion chamber (5) be greater than it is described enter The sectional area of the sectional area of mouth (3), the outlet (4) is greater than or equal to the sectional area of the entrance (3).

2. noise reduction components according to claim 1, which is characterized in that the sectional area of the expansion chamber (5) from it is described enter Mouthful (3) connected one end is smoothly transitted into maximum, and is smoothly transitted into and the other end that the outlet (4) is connected.

3. noise reduction components according to claim 1, which is characterized in that the sectional area of the expansion chamber (5) from it is described enter The connected one end of mouth (3) transits directly to maximum, and the sectional area of the outlet (4) is transitted directly to the other end.

4. noise reduction components according to claim 1, which is characterized in that the maximum secting area of the expansion chamber (5) with it is described The ratio of the sectional area of entrance (3) is 1.5: 1 to 10: 1.

5. noise reduction components according to claim 1, which is characterized in that the maximum secting area of the expansion chamber (5) with it is described The ratio of the sectional area of entrance (3) is 2: 1 to 4: 1.

6. any noise reduction components described in -5 according to claim 1, which is characterized in that the entrance (3), outlet are (4) and described Expansion chamber (5) inner wall at least partly pastes sound-absorbing material (6), and the sound-absorbing material (6) is along the maximum cross-section of air-flow vertical direction Product accounts for the ratio of expansion chamber (5) corresponding position sectional area no more than 50%.

7. noise reduction components according to claim 6, which is characterized in that along perpendicular to airflow direction in the expansion chamber (5) One partition (7) with through-hole is set, so that air can only be passed through by the through-hole, the area of the through-hole is not less than entrance (3) sectional area.

8. noise reduction components according to claim 6 or 7, which is characterized in that cavity (2) inner wall all pastes sound absorption material Expect (6).

9. noise reduction components according to claim 6, which is characterized in that in the sound-absorbing material (6) and the expansion chamber (5) Wall at least partly fixation fits together.

10. noise reduction components according to claim 6, which is characterized in that the sound-absorbing material (6) is in following material It is one or two kinds of: porous class sound-absorbing material, fiber-like sound-absorbing material.

11. noise reduction components according to claim 10, which is characterized in that the porous class sound-absorbing material is selected from following material One or both of: polyurethanes aperture foam, foaming aluminum.

12. noise reduction components according to claim 10, which is characterized in that the fiber-like sound-absorbing material is selected from following material One of or it is a variety of: polypropylene fibre, polyethylene fibre, polyethylene fiber peacekeeping polypropylene fibre mixture, glass fibre.

13. a kind of electrical installation, including blower (8), and noise reduction components described in any one of -12 according to claim 1, institute Noise reduction components are stated to be connected at the fan outlet (10).

14. electrical installation according to claim 13, which is characterized in that the electrical installation is sweeping robot, dust suction Device.