Low-noise dust collector
By incorporating partitions and sound-absorbing cotton into the vacuum cleaner and designing an airflow path of contraction-expansion-contraction, the problem of high noise from the exhaust fan was solved, resulting in a low-noise vacuum cleaner design.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO JIEJIANG INTELLIGENT TECHNOLOGY CO LTD
- Filing Date
- 2025-04-11
- Publication Date
- 2026-05-08
AI Technical Summary
The airflow from the fan of the existing vacuum cleaner is quite noisy and needs to be improved to reduce noise.
By setting a partition plate in the vacuum cleaner to divide the fan chamber into a fan chamber and a transition chamber, and setting isolation holes and air outlets in the airflow path, combined with the use of sound-absorbing cotton, the airflow is designed to have a contraction-expansion-contraction flow path to reduce noise.
It effectively reduces the noise of the vacuum cleaner by extending the airflow time and reducing the impact of the airflow directly hitting the plastic shell wall, thus achieving lower noise output.
Smart Images
Figure CN224206730U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vacuum cleaner equipment technology, and in particular to a low-noise vacuum cleaner. Background Technology
[0002] Vacuum cleaners utilize an electric motor to drive a fan at high speed, creating a partial vacuum inside the dust collection chamber. This creates a pressure difference between the dust collection chamber and the outside, generating airflow. Dust is drawn into the dust collection chamber along with the airflow, filtered, and retained inside, while clean air is discharged. However, in existing models, the fan is installed inside the vacuum cleaner's fan cavity, and the exhaust air is directly discharged from the air outlet on the fan cavity. This design results in relatively high noise levels and has room for improvement. Utility Model Content
[0003] The present invention aims to overcome the defects in the prior art and provide a low-noise vacuum cleaner. Its structure allows the airflow discharged from the fan assembly to pass sequentially through the isolation holes of the partition plate, the transition cavity, and the air outlet of the rear end wall. This causes the airflow to flow out in a contraction-expansion-contraction pattern, which greatly reduces noise.
[0004] To achieve the above objectives, this utility model provides a low-noise vacuum cleaner, including a housing and a fan assembly. The housing is configured with a sealed cavity having an air inlet structure on the front wall and a plurality of air outlet holes on the rear wall. A partition plate is provided in the sealed cavity to divide it into a fan cavity located at the front and a transition cavity located at the rear. The partition plate is densely covered with a plurality of isolation holes. The fan assembly is fixedly installed in the fan cavity.
[0005] The further configuration is as follows: the wall thickness of the rear end wall of the sealed cavity is ≥2.5mm;
[0006] And / or, the thickness of the separator grid is ≥2.5mm.
[0007] The configuration is further defined as follows: the flow area of the air outlet on the rear wall of the sealed cavity is ≤19.6mm². 2 ;
[0008] And / or, the flow area of the isolation orifice is ≤19.6mm². 2 .
[0009] Further configured as follows: the housing includes an upper shell and a lower shell that fit together to form a sealed cavity, the front end of the upper shell has an upper arc opening and an upper rib is provided in the middle of its inner surface;
[0010] The front end of the lower shell has a lower arc opening that cooperates with the upper arc opening to form an installation opening, and the middle of its inner surface is provided with a lower partition rib that cooperates with the upper partition rib to form a partition grid.
[0011] The fan assembly is further configured such that: the fan housing includes a fan casing and a motor installed inside the fan casing, and the motor is externally wrapped with a first sound-absorbing cotton.
[0012] And / or, the fan casing is provided with a second sound-absorbing cotton at the air outlet.
[0013] Further configured as follows: the fan housing includes a front cover and a rear cover fixedly connected, the front cover includes a retaining ring abutting against the inner wall of the mounting port, and an air inlet plate disposed on the front surface of the retaining ring and extending into the mounting port, the air inlet plate being provided with an air inlet structure;
[0014] Fixing ears are provided on both sides of the rear surface of the retaining ring. Upper fixing posts and lower fixing posts are respectively provided on the inner surfaces of the upper shell and the lower shell corresponding to the fixing ears. The upper fixing posts and lower fixing posts cooperate to clamp the fixing ears and fix them with screws.
[0015] The rear cover is further configured such that: a first cavity with an open front end and a second cavity located outside the first cavity and open at the rear end are provided, and a communication port is provided between the first cavity and the second cavity, and the second sound-absorbing cotton is inserted into the second cavity.
[0016] The upper shell is further configured such that upper constraint ribs are provided on both sides behind the upper partition rib, and a third sound-absorbing cotton is constrained between the upper constraint ribs.
[0017] The lower shell is provided with lower constraint ribs on both sides behind the lower partition rib, and the lower constraint ribs are constrained by a fourth sound-absorbing cotton.
[0018] The further configuration includes a dust cup, a suction pipe that is closed at the rear end and extends axially forward is connected to the upper part of the upper shell, the dust cup is fixedly connected to the lower part of the suction pipe and the two are structurally connected, and the opening of the dust cup is connected to the front end of the sealed cavity.
[0019] The rear end wall of the sealed cavity is further configured as an inclined structure for guiding the airflow to blow downwards.
[0020] Compared with the prior art, the present invention has a simple and reasonable structure. The first and second sound-absorbing cotton can reduce the noise of the fan assembly. At the same time, the third and fourth sound-absorbing cotton can prevent the airflow from blowing directly onto the plastic shell wall to reduce flow noise. Furthermore, the airflow discharged from the fan assembly passes through the isolation holes of the partition plate, the transition cavity and the air outlet of the rear end wall in sequence, so that the airflow flows out in a contraction-expansion-contraction form, which greatly reduces noise. Attached Figure Description
[0021] Figure 1 This is a three-dimensional structural diagram of a low-noise vacuum cleaner according to the present invention;
[0022] Figure 2 This is a schematic diagram of the axial cross-sectional structure of a vacuum cleaner;
[0023] Figure 3 This is a schematic diagram of the upper shell structure;
[0024] Figure 4 This is a schematic diagram of the lower shell structure;
[0025] Figure 5 This is a schematic diagram of the separate structure of the fan casing. Figure 1 ;
[0026] Figure 6 This is a schematic diagram of the separate structure of the fan casing. Figure 2 .
[0027] The following reference numerals are marked on the accompanying drawings:
[0028] 10. Shell; 11. Divider plate; 12. Front wall; 13. Rear wall; 14. Fan cavity; 15. Transition cavity; 110. Upper shell; 111. Upper arc opening; 112. Upper partition rib; 113. Upper fixing post; 114. Upper restraint rib; 120. Lower shell; 121. Lower arc opening; 122. Lower partition rib; 123. Lower fixing post; 124. Lower restraint rib; 130. Suction pipe;
[0029] 20. Fan assembly; 21. Fan housing; 22. Motor; 210. Front cover; 211. Retaining ring; 212. Air inlet plate; 213. Fixing lug; 214. Air inlet structure; 220. Rear cover; 221. First cavity; 222. Second cavity; 223. Connecting port;
[0030] 30. Battery pack; 40. First sound-absorbing cotton; 50. Second sound-absorbing cotton; 60. Third sound-absorbing cotton; 70. Fourth sound-absorbing cotton; 80. Dust cup. Detailed Implementation
[0031] The following describes a specific embodiment of the present invention in detail with reference to the accompanying drawings. However, it should be understood that the scope of protection of the present invention is not limited to the specific embodiment.
[0032] This utility model discloses a low-noise vacuum cleaner, such as... Figure 1 and Figure 2As shown, the device includes a housing 10, a fan assembly 20, and a dust cup 80. The housing 10 has a sealed cavity with an air inlet structure 214 on the front wall 12 and several air outlets on the rear wall 13. A partition plate 11 divides the sealed cavity into a fan chamber 14 at the front and a transition chamber 15 at the rear. The partition plate 11 has several isolation holes. The fan assembly 20 is fixedly installed within the fan chamber 14. Above the sealed cavity, the housing 10 has a suction pipe 130 that is closed at the rear and extends axially forward. The dust cup 80 is fixedly installed below the suction pipe 130. The structure is interconnected, and the opening of the dust cup 80 is connected to the front end of the sealed cavity. In this way, the fan assembly 20 generates suction when it works, and the airflow is drawn in from the front port of the suction pipe 130 and enters the dust cup 80 through the connection. The airflow discharged from the fan assembly 20 passes through the isolation hole of the partition plate 11, the transition cavity 15 and the air outlet of the rear end wall 13 in sequence. This makes the airflow discharged from the fan assembly 20 flow out in a contraction-expansion-contraction form, which greatly reduces noise. Preferably, the rear end wall 13 of the sealed cavity is a sloping structure to guide the airflow to blow downwards, so as to avoid the discharged airflow blowing directly on the operator.
[0033] In this embodiment, the vacuum cleaner is wireless and includes a battery pack 30 fixed within the transition cavity 15; in other embodiments, the vacuum cleaner may also be wired.
[0034] In this embodiment, as Figure 2 , Figure 3 and Figure 4 As shown, the thickness of the partition grille 11 is ≥2.5mm, which extends the air outlet time to reduce noise, while the flow area of the isolation holes on it is ≤19.6mm². 2 Such a small area of isolation holes can effectively reduce the noise of airflow, and the thicker wall can extend the air outlet time; at the same time, the rear wall 13 of the sealed cavity has a wall thickness of ≥2.5mm, thus extending the air outlet time to reduce noise, while the flow area of the air outlet holes is ≤19.6mm². 2 Such a small air outlet can effectively reduce the noise of airflow.
[0035] In this embodiment, as Figure 2 , Figure 3 and Figure 4As shown, the housing 10 includes an upper shell 110 and a lower shell 120 that fit together to form a sealed cavity. The upper shell 110 has an upper arc-shaped opening 111 at its front end and an upper partition 112 at the center of its inner surface. The lower shell 120 has a lower arc-shaped opening 121 at its front end and a lower partition 122 at the center of its inner surface. The upper arc-shaped opening 111 and the lower arc-shaped opening 121 cooperate to form an installation opening, and the upper partition 112 and the lower partition 122 cooperate to form a partition grid 11. The upper shell 110 fits together to form a sealed cavity. Upper constraint ribs 114 are provided on both sides behind the upper partition rib 112, and third sound-absorbing cotton 60 is constrained between the corresponding upper constraint ribs 114. Lower constraint ribs 124 are provided on both sides behind the lower partition rib 122, and fourth sound-absorbing cotton 70 is constrained between the corresponding lower constraint ribs 124. In this way, the airflow entering the transition cavity 15 can be prevented from blowing directly onto the cavity wall through the third sound-absorbing cotton 60 and the fourth sound-absorbing cotton 70, thereby achieving the purpose of reducing noise.
[0036] In this embodiment, as Figure 2 As shown, the fan assembly 20 fixed in the fan cavity 14 includes a fan housing 21 and a motor 22 installed in the fan housing 21. The motor 22 is wrapped with a first sound-absorbing cotton 40, and the fan housing 21 is provided with a second sound-absorbing cotton 50 at the air outlet. In this way, the noise of the motor 22 can be reduced by the cooperation of the first sound-absorbing cotton 40 and the second sound-absorbing cotton 50.
[0037] Specifically, such as Figure 5 and Figure 6 As shown, the fan housing 21 includes a front cover 210 and a rear cover 220 fixedly connected. The front cover 210 includes a retaining ring 211 abutting against the inner wall of the air inlet hole, and an air inlet plate 212 disposed on the front surface of the retaining ring 211 and extending into the air inlet hole. The air inlet plate 212 forms the front wall 12 of the sealed cavity and is provided with an air inlet structure 214. Fixing ears 213 are provided on opposite sides of the rear surface of the retaining ring 211. Upper fixing posts 113 and lower fixing posts 123 are respectively provided on the inner surfaces of the upper shell 110 and the lower shell 120 corresponding to the fixing ears 213. The column 113 cooperates with the lower fixed column 123 to clamp the fixed ear 213 and fix it with screws; this can ensure the sealing effect between the fan housing 21 and the air inlet of the sealed cavity, thereby ensuring that the airflow can only be discharged through the air outlet of the rear wall 13 to reduce noise; the rear cover 220 is configured with a first cavity 221 with an open front end and a second cavity 222 located outside the first cavity 221 and open at the rear end. A communication port 223 is provided between the first cavity 221 and the second cavity 222, and the second sound-absorbing cotton 50 is inserted into the second cavity 222.
[0038] Compared with the prior art, the present invention has a simple and reasonable structure. The first and second sound-absorbing cotton can reduce the noise of the fan assembly. At the same time, the third and fourth sound-absorbing cotton can prevent the airflow from blowing directly onto the plastic shell wall to reduce flow noise. Furthermore, the airflow discharged from the fan assembly passes through the isolation holes of the partition plate, the transition cavity and the air outlet of the rear end wall in sequence, so that the airflow flows out in a contraction-expansion-contraction form, which greatly reduces noise.
[0039] The above-disclosed embodiments are merely examples of the present utility model. However, the present utility model is not limited thereto, and any variations that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.
Claims
1. A low-noise vacuum cleaner, characterized in that, The device includes a housing and a fan assembly. The housing is configured with a sealed cavity having an air inlet structure on the front wall and a plurality of air outlet holes on the rear wall. A partition plate is provided in the sealed cavity to divide it into a fan cavity located at the front and a transition cavity located at the rear. The partition plate is densely covered with a plurality of isolation holes. The fan assembly is fixedly installed in the fan cavity.
2. The low-noise vacuum cleaner according to claim 1, characterized in that, The wall thickness of the rear end wall of the sealed cavity is ≥2.5mm; And / or, the thickness of the separator grid is ≥2.5mm.
3. A low-noise vacuum cleaner according to claim 1 or 2, characterized in that, The air outlet area on the rear wall of the sealed cavity is ≤19.6mm². 2 ; And / or, the flow area of the isolation orifice is ≤19.6mm². 2 .
4. A low-noise vacuum cleaner according to claim 1, characterized in that, The housing includes an upper shell and a lower shell that fit together to form a sealed cavity. The upper shell has an upper arc opening at its front end and an upper rib is provided in the middle of its inner surface. The front end of the lower shell has a lower arc opening that cooperates with the upper arc opening to form an installation opening, and the middle of its inner surface is provided with a lower partition rib that cooperates with the upper partition rib to form a partition grid.
5. A low-noise vacuum cleaner according to claim 4, characterized in that, The fan assembly includes a fan housing and a motor installed inside the fan housing, and the motor is externally wrapped with a first sound-absorbing cotton. And / or, the fan casing is provided with a second sound-absorbing cotton at the air outlet.
6. A low-noise vacuum cleaner according to claim 5, characterized in that, The fan housing includes a front cover and a rear cover that are fixedly connected. The front cover includes a retaining ring that abuts against the inner wall of the mounting port, and an air inlet plate that is disposed on the front surface of the retaining ring and extends into the mounting port. The air inlet plate is provided with an air inlet structure. Fixing ears are provided on both sides of the rear surface of the retaining ring. Upper fixing posts and lower fixing posts are respectively provided on the inner surfaces of the upper shell and the lower shell corresponding to the fixing ears. The upper fixing posts and lower fixing posts cooperate to clamp the fixing ears and fix them with screws.
7. A low-noise vacuum cleaner according to claim 6, characterized in that, The rear cover has a first cavity with an open front end and a second cavity located outside the first cavity and open at the rear end. A communication port is provided between the first cavity and the second cavity, and the second sound-absorbing cotton is inserted into the second cavity.
8. A low-noise vacuum cleaner according to claim 4, characterized in that, The upper shell is provided with upper constraint ribs on both sides behind the upper partition rib, and a third sound-absorbing cotton is constrained between the upper constraint ribs. The lower shell is provided with lower constraint ribs on both sides behind the lower partition rib, and the lower constraint ribs are constrained by a fourth sound-absorbing cotton.
9. A low-noise vacuum cleaner according to claim 4, characterized in that, It also includes a dust cup, and a suction tube that is closed at the rear end and extends forward axially is connected to the upper part of the upper shell. The dust cup is fixedly connected to the lower part of the suction tube and the two are structurally connected. The opening of the dust cup is connected to the front end of the sealed cavity.
10. A low-noise vacuum cleaner according to claim 1, characterized in that, The rear wall of the sealed cavity is a sloping structure designed to guide the airflow downwards.