low noise vacuum cleaner

Abstract

To provide a vacuum cleaner that reduces noise generated during exhaust. [Solution] A low-noise vacuum cleaner includes a housing (10) and a fan component (20). The housing has an intake structure in a front end wall (12) and an enclosed space with multiple exhaust holes in a rear end wall (13). A partition grill (11) is provided within the enclosed space, dividing it into a front fan chamber (14) and a rear transition chamber (15). The partition grill has multiple isolation holes, and the airflow discharged by the fan component passes through the isolation holes, the transition chamber, and the exhaust holes in the rear end wall in that order. This configuration allows the airflow to be discharged in a "contraction-expansion-contraction" flow pattern, effectively reducing exhaust noise.

Description

[Technical Field]

[0001] The present invention relates to the technical field of vacuum cleaner devices, and in particular to low noise vacuum cleaners. [Background technology]

[0002] A vacuum cleaner uses an electric motor to rotate a fan at high speed, creating a local vacuum inside the dust collection chamber, generating an airflow due to the difference in air pressure between the chamber and the outside, sucking dust into the dust collection chamber along with the airflow, and then passing the dust through a filter to retain it in the dust collection chamber, and then discharging clean air.

[0003] However, conventional fans are installed in the fan chamber of a vacuum cleaner, and the airflow discharged by the fan is directly discharged from an exhaust hole above the fan chamber. This type of exhaust structure produces a loud exhaust noise, and there is room for improvement. Summary of the Invention [Problem to be solved by the invention]

[0004] The present invention aims to overcome the drawbacks of the prior art by providing a low-noise vacuum cleaner, in which the airflow discharged from the fan component passes through a partition grille with isolation holes, a transition chamber, and an exhaust hole in the rear end wall, in that order, causing the airflow to flow in a "contraction-expansion-contraction" pattern before being exhausted, thereby significantly reducing noise. [Means for solving the problem]

[0005] To achieve this objective, the present invention provides a low-noise vacuum cleaner including a housing and a fan component, wherein the housing is configured to form an enclosed space having an intake structure on a front end wall and a plurality of exhaust holes on a rear end wall, the enclosed space is divided into a front fan chamber and a rear transition chamber by a partition grille provided with a number of isolation holes, and the fan component is fixedly mounted in the fan chamber.

[0006] Furthermore, the thickness of the rear end wall of the sealed space may be 2.5 mm or more.

[0007] Alternatively, the thickness of the partition grille may be 2.5 mm or more.

[0008] Furthermore, the exhaust hole in the rear end wall may have a flow area of ​​19.6 mm<2 > or less.

[0009] Alternatively, the flow area of ​​the separation hole may be 19.6 mm 2 or less.

[0010] Furthermore, the housing includes an upper housing and a lower housing that form an enclosed space, and an upper arc port is provided at the front end of the upper housing, an upper reinforcing rib is provided at the center of the inner surface, a lower arc port is provided at the front end of the lower housing and cooperates with the upper arc port to form an attachment port, and a lower reinforcing rib is provided at the center of the inner surface that cooperates with the upper reinforcing rib to form a partition grill.

[0011] Furthermore, the fan component may include a fan housing and a motor installed in the fan housing, and a first sound-absorbing cotton may be wrapped around the outside of the motor.

[0012] Alternatively, a second sound-absorbing cotton may be installed at the exhaust portion of the fan housing.

[0013] Furthermore, the fan housing includes a front cover body and a rear cover body connected together, and the front cover body includes a stopper ring that abuts against the inner wall of the mounting opening, and an intake plate that is provided on the front of the stopper ring and extends into the mounting opening, and the intake plate is provided with an intake structure.

[0014] Fixed ears are provided on both sides of the back surface of the stopper ring, and corresponding upper and lower fixed columns are provided on the inner surfaces of the upper and lower housings, which clamp the fixed ears and are fixed in place with screws.

[0015] Furthermore, the rear cover body forms a first space at the front end opening and a second space at the rear end opening located outside, a communication port is provided between the first space and the second space, and a second sound-absorbing cotton is fitted in the second space.

[0016] Furthermore, the upper housing may be provided with upper restraining ribs on both sides behind the upper reinforcing rib, and the third sound-absorbing cotton may be restrained between the upper restraining ribs.

[0017] The lower housing may have lower restraining ribs on both sides behind the lower reinforcing rib, and the fourth sound-absorbing cotton may be restrained between the lower restraining ribs.

[0018] Furthermore, a dust cup is provided, and a dust collection pipe that is closed at its rear end and extends axially forward is connected to the top of the upper housing, and the dust cup is fixedly connected to the bottom of the dust collection pipe, with a communicating structure between the two, and the opening of the dust cup is connected to the front end of the sealed space.

[0019] Furthermore, the rear end wall of the sealed space may have an inclined surface structure for directing the airflow downward at an angle. [Effects of the Invention]

[0020] This invention has a simple and reasonable structure, and the first and second sound-absorbing cottons can reduce the operating noise of the fan components, and the third and fourth sound-absorbing cottons can prevent the airflow from directly colliding with the plastic casing, thereby reducing the flow noise.

[0021] Furthermore, the airflow discharged by the fan component passes through the isolation hole in the partition grille, the transition chamber, and the exhaust hole in the rear end wall in sequence, allowing the airflow to be exhausted while flowing in a "contraction-expansion-contraction" pattern, significantly reducing noise. [Brief explanation of the drawings]

[0022] [Figure 1] 1 is a perspective view showing the three-dimensional structure of a low-noise vacuum cleaner according to the present invention. [Figure 2] 2 is a schematic view showing the axial cross-sectional structure of the vacuum cleaner. FIG. [Figure 3]1 is a diagram showing the structure of an upper housing. [Figure 4] 10 is a diagram showing the structure of the lower housing. FIG. [Figure 5] FIG. 1 is a first schematic view showing a separation structure of a fan housing. [Figure 6] FIG. 10 is a second schematic view showing the separation structure of the fan housing. DETAILED DESCRIPTION OF THE INVENTION

[0023] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings, but the scope of protection of the present invention is not limited to the following specific example.

[0024] As shown in Figures 1 and 2, the low-noise vacuum cleaner of the present invention includes a housing 10, a fan component 20, and a dust cup 80. The housing 10 has an intake structure 214 on its front end wall 12 and a plurality of exhaust holes on its rear end wall 13, forming an enclosed space. A partition grille 11 is provided within the enclosed space, dividing a fan chamber 14 at the front and a transition chamber 15 at the rear. The partition grille 11 is provided with a plurality of isolation holes, and the fan component 20 is fixedly mounted within the fan chamber 14.

[0025] A dust collection tube 130, which is closed at the rear end and extends axially forward, is connected to the upper part of the sealed space of the housing 10. The dust cup 80 is fixedly attached below the dust collection tube 130, and the two are connected by a communicating structure. The opening of the dust cup 80 is connected to the front end of the sealed space.

[0026] With this configuration, suction force is generated by the operation of the fan component 20, and airflow is sucked into the front end of the dust suction pipe 130 and passes through the communication part into the dust cup 80. The airflow discharged from the fan component 20 flows through the isolation hole in the partition grille 11, the transition chamber 15, and the exhaust hole in the rear end wall 13 in order, flowing and being discharged in a "contraction-expansion-contraction" pattern, which significantly reduces noise.

[0027] Preferably, the rear end wall 13 of the sealed space has an inclined surface structure for directing the airflow downward at an angle, thereby preventing the exhaust airflow from directly hitting the operator.

[0028] In this embodiment, the cleaner is wireless and includes a battery pack 30 which is fixed within the transition chamber 15. In other embodiments, the cleaner may be configured as a wired cleaner.

[0029] As shown in Figures 2, 3, and 4, the thickness of the partition grille 11 is set to 2.5 mm or more, which extends the exhaust time and reduces noise. In addition, the flow area of ​​the isolation holes on the partition grille 11 is set to 19.6 mm2 or less, and the small area of ​​the isolation holes effectively suppresses noise when air passes through.

[0030] Similarly, the thickness of the rear end wall 13 of the sealed space is set to 2.5 mm or more, which extends the exhaust time and reduces noise. In addition, the flow area of ​​the exhaust hole in the rear end wall 13 is set to 19.6 mm2 or less, so that even the small area of ​​the exhaust hole effectively suppresses noise when air passes through.

[0031] 2, 3 and 4, the housing 10 includes an upper housing 110 and a lower housing 120 that form a sealed space, and an upper arc port 111 is provided at the front end of the upper housing 110, and an upper reinforcing rib 112 is provided at the center of its inner surface. A lower arc port 121 is provided at the front end of the lower housing 120, and a lower reinforcing rib 122 is provided at the center of its inner surface. The upper arc port 111 and the lower arc port 121 combine to form an attachment port, and the upper reinforcing rib 112 and the lower reinforcing rib 122 combine to form the partition grille 11.

[0032] The upper housing 110 is provided with upper restraining ribs 114 on both sides behind the upper reinforcing rib 112, and the third sound-absorbing cotton 60 is restrained between these upper restraining ribs 114. The lower housing 120 is provided with lower restraining ribs 124 on both sides behind the lower reinforcing rib 122, and the fourth sound-absorbing cotton 70 is restrained between these lower restraining ribs 124. As a result, the action of the third sound-absorbing cotton 60 and the fourth sound-absorbing cotton 70 prevents the airflow entering the transition chamber 15 from directly colliding with the housing wall, thereby reducing noise.

[0033] 2, the fan component 20 fixed to the fan chamber 14 includes a fan housing 21 and a motor 22 installed therein, with a first sound-absorbing cotton 40 wrapped around the outer periphery of the motor 22 and a second sound-absorbing cotton 50 provided at the exhaust section of the fan housing 21. As a result, the first sound-absorbing cotton 40 and the second sound-absorbing cotton 50 work together to reduce the operating noise of the motor 22.

[0034] 5 and 6, the fan housing 21 includes a fixedly connected front cover body 210 and a rear cover body 220. The front cover body 210 includes a stopper ring 211 that abuts against the inner wall of the intake hole, and an intake plate 212 that is provided in front of the stopper ring 211 and extends into the intake hole, and the intake plate 212 forms the front end wall 12 of the sealed space, and an intake structure 214 is provided thereon.

[0035] Fixing ears 213 are provided on both sides of the rear surface of the stopper ring 211, and corresponding upper and lower fixing posts 113, 123 are provided on the inner surfaces of the upper and lower housings 110, 120. The fixing ears 213 are clamped by the upper and lower fixing posts 113, 123 and fixed with screws. This ensures a tight seal between the fan housing 21 and the intake end of the sealed space, ensures that the airflow is discharged only through the exhaust hole in the rear end wall 13, and achieves noise reduction.

[0036] The rear cover body 220 is configured with a first space 221 having an open front end and a second space 222 located outside the first space 221 and having an open rear end, and a communication opening 223 is provided between the first space 221 and the second space 222, and a second sound-absorbing cotton 50 is inserted into the second space 222.

[0037] Compared with the prior art, the present invention has a simple and rational structure, and the cooperation of the first and second sound-absorbing cottons can reduce the operating noise of the fan component, while the third and fourth sound-absorbing cottons can prevent the airflow from directly colliding with the plastic housing wall, thereby reducing flow noise.

[0038] Furthermore, the airflow discharged by the fan component flows in a "contraction-expansion-contraction" pattern as it passes through the isolation holes in the bulkhead grille, the transition chamber, and the exhaust holes in the rear end wall, in that order, significantly reducing noise.

[0039] The above is only one embodiment of the present invention, but the present invention is not limited thereto, and any modifications made by those skilled in the art shall fall within the scope of protection of the present invention. [Explanation of symbols]

[0040] 10: housing, 11: partition grill, 12: front end wall, 13: rear end wall, 14: fan chamber, 15: transition chamber, 110: upper housing, 111: upper arc port, 112: upper reinforcing rib, 113: upper fixed column, 114: upper restraining rib, 120: lower housing, 121: lower arc port, 122: lower reinforcing rib, 123: lower fixed column, 124: lower restraining rib, 130: dust collection tube 20: Fan component, 21: Fan housing, 22: Motor, 210: Front cover body, 211: Stopper ring, 212: Intake plate, 213: Fixing ear, 214: Intake structure, 220: Rear cover body, 221: First space, 222: Second space, 223: Communication port 30: Battery pack, 40: 1st sound absorbing cotton, 50: 2nd sound absorbing cotton, 60: 3rd sound absorbing cotton, 70: 4th sound absorbing cotton, 80: Dust cup

Claims

1. A low noise vacuum cleaner comprising a housing and a fan component, the housing has an intake structure on a front end wall and a plurality of exhaust holes on a rear end wall, forming a sealed space; A partition grill is provided within the enclosed space to divide it into a front fan chamber and a rear transition chamber; The partition grille is densely packed with a number of isolation holes, The low-noise vacuum cleaner is characterized in that the fan component is fixedly mounted within the fan chamber.

2. The thickness of the rear end wall of the sealed space is 2.5 mm or more. And / or, the thickness of the partition grill is 2.5 mm or more, The low noise vacuum cleaner according to claim 1.

3. The flow area of ​​the exhaust hole in the rear end wall is 19.6 mm ２ That is: and / or the flow area of ​​the isolation hole is 19.6 mm ２ 3. A low noise vacuum cleaner according to claim 1 or 2, characterized in that:

4. the housing includes an upper housing and a lower housing that form a sealed space; An upper arc port is provided at the front end of the upper housing, and an upper reinforcing rib is formed at the center of the inner surface; a lower arc port that forms an attachment port in combination with the upper arc port is provided at the front end of the lower housing, and a lower reinforcing rib corresponding to the upper reinforcing rib is formed at the center of the inner surface; 2. The low noise vacuum cleaner according to claim 1, wherein the upper reinforcing rib and the lower reinforcing rib combine to form a partition grill.

5. The fan component includes a fan housing and a motor disposed therein; A first sound-absorbing cotton is wrapped around the outer periphery of the motor, 5. The low noise vacuum cleaner according to claim 4, further comprising: a second sound absorbing cotton provided at the exhaust portion of the fan housing.

6. the fan housing includes a front cover body and a rear cover body fixedly connected to each other; the front cover body includes a stopper ring that contacts an inner wall of the mounting opening, and an air intake plate that is provided on a front surface of the stopper ring and extends into the mounting opening, The air intake plate is provided with an air intake structure, The stopper ring has fixing lugs on both sides of its rear surface, upper and lower fixing posts are provided on the inner surfaces of the upper and lower housings in correspondence with the fixing lugs; 6. A low-noise vacuum cleaner according to claim 5, wherein the fixing ear is clamped between the upper fixing pillar and the lower fixing pillar and fastened with screws.

7. the rear cover body includes a first space having an open front end and a second space located outside the first space and having an open rear end; a communication port is provided between the first space and the second space, 7. The low noise vacuum cleaner according to claim 6, wherein a second sound absorbing cotton is inserted into the second space.

8. Upper restraining ribs are provided on both sides of the rear of the upper reinforcing rib of the upper housing, and the third sound-absorbing cotton is restrained between the upper restraining ribs.

5. A low-noise vacuum cleaner according to claim 4, wherein lower restraining ribs are provided on both sides behind the lower reinforcing rib of the lower housing, and the fourth sound-absorbing cotton is restrained between the lower restraining ribs.

9. It also has a dust cup, A dust collection tube is connected to the upper part of the upper housing, the rear end of which is closed and which extends forward in the axial direction. The dust cup is fixedly connected to the lower part of the dust collection pipe, and the two constitute a communication structure; 3. The low noise vacuum cleaner according to claim 2, wherein the opening of the dust cup is connected to the front end of the enclosed space.

10. 2. The low noise vacuum cleaner according to claim 1, A low-noise vacuum cleaner characterized in that the rear end wall of the enclosed space has an inclined surface structure for directing airflow diagonally downward.

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