CN100556352C - Vacuum cleaner - Google Patents

Abstract

A vacuum cleaner, comprising a base, a fan arranged on the base and a top cover covering the base, a cavity for accommodating the fan is formed between the base and the top cover, and the cavity passes through the fan installed on the top cover. The air outlet is connected with the outside air, and at least two baffle walls surrounding the fan are arranged between the base and the top cover, the baffle walls extend from the base to the top cover, and the baffle walls divide the cavity into multiple independent The anechoic chamber also has gaps on the retaining walls, and the gaps on two adjacent retaining walls are staggered from each other, and the multiple anechoic chambers communicate with each other only at the gaps. The present invention attenuates the energy of the sound waves by reflecting the sound waves emitted by the fan multiple times, thus having better noise reduction effect.

Description

Vacuum cleaner

technical field

The invention relates to a vacuum cleaner.

Background technique

Vacuum cleaners in the prior art usually include a housing, a fan inside the housing, and a cover outside the fan. Because the noise of the fan is very loud when it is working, especially the noise of high-power vacuum cleaners used in hotels or office buildings It is very large and affects people's normal life and work. In order to alleviate the noise, some sound-absorbing materials, such as sponges, are usually placed on the fan or in the casing. However, placing the sponge makes it difficult to dissipate the heat of the fan, causing accidents such as fire. Chinese patent ZL96207867.0 discloses a low-noise vacuum cleaner, which uses a labyrinth-shaped airflow channel formed by a sound-absorbing cover with a spiral-shaped sound-absorbing channel to extend the travel route of the airflow in the vacuum cleaner, so that the sound waves can pass through the sound-absorbing cover multiple times. Reflection attenuation, thereby reducing the energy of the sound wave. However, in this spiral sound-absorbing structure, the sound wave must go through a long route to attenuate most of the energy; in addition, the spiral sound-absorbing structure severely limits the size of the air volume. The vacuum cleaner will lose some power.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art and provide a low-noise vacuum cleaner.

In order to achieve the above object, the technical solution adopted by the present invention is: a vacuum cleaner, comprising a base with a dust collection chamber, a fan arranged on the base and a top cover covered on the base, A cavity is formed between the base and the top cover, and the cavity communicates with the outside air through an air outlet arranged on the base or the top cover; At least two baffle walls surrounding the fan are arranged between the base and the top cover, the baffle walls extend from the base to the top cover, and the The barrier wall divides the cavity into a plurality of mutually independent anechoic chambers, and there are gaps on the barrier walls, and the gaps on two adjacent barrier walls are staggered from each other, and the multiple anechoic chambers are only connected to each other at the gap.

A further technical solution of the present invention is: at least a part of the cross-section of the blocking wall is arc-shaped, and the center of the arc of the blocking wall coincides with the center of the fan.

The cross-section of the blocking walls is roughly "C"-shaped, and the opening directions of the two adjacent blocking walls are spaced 180° apart from each other.

The baffle includes an inner baffle surrounding the outer side of the fan, at least one intermediate baffle surrounding the outer side of the inner baffle, and a gap between the top cover and the outermost intermediate baffle A baffle is also provided, the notch opened on the middle baffle is located on one side of the baffle, and the air outlet is located on the other side of the baffle.

There is a first notch on the inner retaining wall, and the air outlet of the fan faces the first notch.

In addition, the blocking wall is integrally arranged on the base, or the blocking wall is integrally arranged on the top cover, or the blocking wall is integrally arranged on the base and the The convex ribs on the top cover are formed by butting with each other.

A plurality of barrier walls divide the cavity into multiple independent anechoic chambers, so that the sound waves are reflected multiple times between the two barrier walls, and the energy is attenuated; while the openings of the two adjacent barrier walls are staggered from each other, so that part of the noise from the gap The overflowing sound waves are hindered, so part of the sound waves are reflected back to the barrier walls for multiple reflections, and the other part of the sound waves continues to enter the next level of barrier walls for multiple reflections. Therefore, the present invention has more advantages than the prior art. Good noise reduction effect; in addition, compared with the prior art, the above-mentioned structure increases the gas flow rate and ensures the power of the vacuum cleaner.

Description of drawings

Accompanying drawing 1 is the main sectional view of the present invention;

Accompanying drawing 2 is the sectional view along A-A among this accompanying drawing 1;

Among them: 1. Base; 2. Inner retaining wall; 21. First gap; 3. Middle retaining wall; 31. Second gap; 4. Exhaust outlet; 5. Fan; 6. Dust collecting chamber; 7. Top Cover; 8. Baffle;

Detailed ways

Accompanying drawing 1～2 is the preferred embodiment of the present invention, a kind of vacuum cleaner, comprises the base 1 that has dust collecting room 6, the blower fan 5 that is arranged on the base 1, the top cover 7 that covers on the base 1, top The cover 7 is provided with an air outlet 4, and the base 1 and the top cover 7 are surrounded by the air outlet 4 to form a cavity that allows the air outlet of the fan 5 to communicate with the outside air. There are also two retaining walls surrounding the fan 5, the retaining walls include the inner retaining wall 2 surrounding the fan 5 and the intermediate retaining wall 3 surrounding the inner retaining wall 3, an intermediate retaining wall 3 is used in this embodiment The baffle, sometimes in order to achieve a better sound attenuation effect, the number of intermediate baffles will be appropriately increased.

The inner retaining wall 2 and the middle retaining wall 3 extend from the base 1 to the top cover 7, and the two retaining walls divide the cavity into two airtight chambers. The first anechoic chamber is formed between the inner retaining wall 2 and the fan 5, and the middle The second anechoic chamber is formed between the retaining wall 3 and the inner retaining wall 2, and the third anechoic chamber is formed between the intermediate retaining wall 3 and the outer top cover 7. Wherein, there is a first notch 21 on the inner retaining wall 2, and a second notch 31 on the middle retaining wall 3, and the first notch 21 and the second notch 31 are staggered from each other, and the first notch 21 and the second notch 31 suppress the first noise. chamber, the second anechoic chamber, and the third anechoic chamber are communicated, and the clean air discharged from the air outlet of the fan 5 passes through the first anechoic chamber, the second anechoic chamber and the third anechoic chamber (as indicated by the arrow in the accompanying drawing 2) successively. Air flow direction), and finally discharged into the outside air by the air outlet 4.

In order to further prolong the travel route of the sound wave and make it reflect and attenuate multiple times, a baffle 8 is also arranged between the top cover 7 and the middle baffle 3, the second notch 31 is located on one side of the baffle 8, and the air outlet 4 is located on the other side of the baffle plate 8, therefore, after the sound wave comes out from the second gap 31, it can only propagate to the side without the baffle plate 8, and finally passes through a long route before being released from the air outlet 4 to the outside air. Diverge in. The air outlet of the fan 5 faces the first notch 21 , which can reduce the loss of air flow velocity and reduce the power loss of the fan 5 .

The airtight air interlayer formed between the inner wall 2, the middle wall 3 and the top cover 7 makes the sound waves reflect repeatedly between the two layers of obstacles, and most of the energy attenuates; while the inner wall 2 and the middle wall The openings of 3 are staggered from each other, so that part of the sound waves overflowing from the gap are hindered, so part of the sound waves are reflected back to the first anechoic chamber for multiple reflections, and the other part of the sound waves continue to enter the second anechoic chamber and the third anechoic chamber for multiple times reflection, so the present invention has a better noise reduction effect than the prior art.

In a preferred embodiment of the present invention, the cross-sections of the inner retaining wall 2 and the outer retaining wall 3 are at least partially arc-shaped, and the center of the arc of the inner retaining wall 2 and the intermediate retaining wall 3 coincides with the center of the fan 5; More precisely, the cross-sections of the inner blocking wall 2 and the middle blocking wall 3 are roughly "C" shaped, and the first notch 21 and the second notch 31 are spaced 180° apart from each other.

Sometimes, for the convenience of processing, the retaining wall can be integrally arranged on the base 1, or integrally arranged on the top cover 7; The ribs on the 7 are butted with each other to form.

Claims (9)

1, a kind of dust catcher, comprise have dust storage chamber (6) pedestal (1), be arranged on the blower fan (5) on the described pedestal (1) and cover on top cover (7) on the described pedestal (1), forming one between described pedestal (1) and the described top cover (7) can be for the cavity of ccontaining blower fan (5), described cavity by be arranged on described pedestal (1) and go up or described top cover (7) on exhaust outlet (4) be connected with outside air; Also be provided with at least two retaining walls (2 between described pedestal (1) and the described top cover (7) around described blower fan (5), 3), it is characterized in that: described retaining wall (2,3) extend to described top cover (7) from described pedestal (1), and described retaining wall (2,3) described cavity is separated into a plurality of separate anechoic chambers, described retaining wall (2,3) upper edge circumferentially offers breach (21,31), described adjacent two retaining walls (2,3) breach (21 on, 31) stagger mutually, described a plurality of anechoic chamber is only at breach (21,31) locate to be interconnected, described top cover (7) and between outermost retaining wall, also be provided with baffle plate (8), the described breach that is positioned on the outermost retaining wall is positioned at a side of described baffle plate (8), and described exhaust outlet (4) is positioned at the opposite side of described baffle plate (8).

2, dust catcher according to claim 1 is characterized in that: the cross section of described retaining wall (2,3) has at least part curved.

3, dust catcher according to claim 2 is characterized in that: the center of circle of the circular arc portion of described retaining wall (2,3) overlaps with the center of described blower fan (5).

4, dust catcher according to claim 2 is characterized in that: the cross section of described retaining wall (2,3) roughly is " C " font, and 180 ° of breach direction spaces on the described two adjacent retaining walls (2,3).

5, dust catcher according to claim 1, it is characterized in that: described retaining wall (2,3) comprise the interior retaining wall (2) that is looped around described blower fan (5) outside and be looped around described in the centre retaining wall (3) in retaining wall (2) outside, offer second breach (31) on this centre retaining wall (3), describedly be positioned at outermost retaining wall and be meant this centre retaining wall (3), and the described breach that is positioned on the outermost retaining wall is meant second breach (31), and described second breach (31) is positioned at a side of described baffle plate (8), and described exhaust outlet (4) is positioned at the opposite side of described baffle plate (8).

6, dust catcher according to claim 5 is characterized in that: have first breach (21) on the retaining wall (2) in described, the air outlet of described blower fan (5) is towards described first breach (21).

7, dust catcher according to claim 1 is characterized in that: described retaining wall (2,3) is wholely set on described pedestal (1).

8, dust catcher according to claim 1 is characterized in that: described retaining wall (2,3) is wholely set on described top cover (7).

9, dust catcher according to claim 1 is characterized in that: described retaining wall (2,3) docks mutually and forms by being wholely set convex tendon on described pedestal (1) and described top cover (7) respectively.

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