WO2022036613A1

WO2022036613A1 - Vacuum cleaner

Info

Publication number: WO2022036613A1
Application number: PCT/CN2020/110136
Authority: WO
Inventors: 顾良; 李孝亮; 孔钊
Original assignee: 天佑电器（苏州）有限公司
Priority date: 2020-08-20
Filing date: 2020-08-20
Publication date: 2022-02-24

Abstract

Disclosed is a vacuum cleaner, which belongs to the technical field of vacuum cleaners. The vacuum cleaner has an outgoing air guide channel, a impeller is arranged within an air inlet of the outgoing air guide channel, the impeller is configured to expel an air stream into the outgoing air guide channel, and a stream blocking structure is provided between an inner wall of the outgoing air guide channel and the impeller, so as to obstruct the air stream from flowing back along a surface of the impeller. The air stream can be obstructed from flowing back along the surface of the impeller by means of the stream blocking structure, reducing air flow leakage, and thereby improving overall efficiency and performance.

Description

a vacuum cleaner

technical field

The present invention relates to the technical field of vacuum cleaners, and in particular, to a vacuum cleaner.

Background technique

As a cleaning tool, vacuum cleaners are widely used in various places. In order to improve the performance of the whole machine, the existing vacuum cleaner generally modifies the motor, and improves the performance of the whole machine by improving the bare metal performance of the motor. However, in the case of motor changes, although the performance of the whole machine has been improved, it will also affect the temperature rise, noise and life of the motor. It often requires multiple adjustments to meet the requirements, and the adjustment cycle is long, resulting in corresponding production and manufacturing. higher cost.

As shown in FIG. 1 , an air duct 100 is provided in the casing of the vacuum cleaner, and the air duct 100 is used to discharge the air filtered in the vacuum cleaner. The air duct 100 has an air inlet and an air outlet, and an impeller 101 is arranged at the air inlet, and the impeller 101 is driven by a motor 102 . When the impeller 101 rotates, the airflow in the vacuum cleaner enters the air duct 100 and is discharged through the air outlet.

Due to the large gap 103 between the impeller 101 and the inner wall of the air duct 100 , air leakage and backflow are likely to occur at the air inlet, resulting in low use efficiency of the motor 102 and low performance of the whole machine.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a vacuum cleaner to solve the technical problems of air leakage and backflow existing in the prior art when the vacuum cleaner exhausts air.

As conceived above, the technical scheme adopted in the present invention is:

A vacuum cleaner has an air outlet and air guide channel, an air inlet of the air outlet air guide channel is provided with a moving impeller, and the moving impeller is configured to discharge air into the air outlet air guide channel, and the outlet air guide channel is A flow blocking structure is arranged between the inner wall of the wind guide channel and the moving impeller, so as to prevent the airflow from flowing back along the surface of the moving impeller.

Wherein, the flow blocking structure includes a first flow blocking ring arranged on the inner wall of the air outlet and air guiding channel, and the first flow blocking ring is arranged on an axial side of the outer edge of the moving impeller.

Wherein, the flow blocking structure includes a sealing ring arranged between the inner wall of the air outlet and air guiding channel and the surface of the moving impeller, and the sealing ring is in contact with the moving impeller to prevent airflow along the The surface of the impeller is recirculated.

Wherein, a plurality of the sealing rings are arranged at intervals.

Wherein, there is a first gap between the lower surface of the moving impeller and the inner wall of the air outlet and air guide channel, and the sealing ring is located in the first gap.

Wherein, the flow blocking structure further includes a second flow blocking ring arranged on the inner wall of the air outlet and wind guide channel, and the second flow blocking ring is arranged on the other axial side of the outer edge of the moving impeller .

Wherein, the first baffle ring and the second baffle ring are disposed opposite to each other and are arranged at intervals along the axial direction of the moving impeller.

Wherein, the flow blocking structure includes a blocking portion arranged around the edge of the air inlet, the blocking portion is bent and extended toward the direction of the moving impeller and protrudes into the interior of the moving impeller.

Wherein, the edge of the moving impeller is bent toward the inner wall of the air outlet and air guide channel to form a flange, and a sealing ring is sleeved on the flange.

Wherein, the inner wall of the air outlet and air guide channel is provided with air guide rib plates, and a plurality of the air guide rib plates are used to guide the air flow discharged from the edge of the moving impeller.

Beneficial effects of the present invention:

In the vacuum cleaner proposed by the present invention, a flow blocking structure is arranged between the inner wall of the air outlet and air guide channel and the moving impeller, so as to prevent the airflow from returning along the surface of the moving impeller, reduce the leakage of air volume, and improve the efficiency and performance of the whole machine.

Description of drawings

1 is a cross-sectional view of a conventional vacuum cleaner;

2 is a cross-sectional view of a vacuum cleaner provided in Embodiment 1 of the present invention;

Fig. 3 is the enlarged view at the A place of Fig. 2;

4 is a front view of the bottom bracket of the vacuum cleaner provided in Embodiment 1 of the present invention;

5 is a cross-sectional view of a vacuum cleaner provided in Embodiment 2 of the present invention;

Fig. 6 is an enlarged view at B of Fig. 5;

7 is a schematic structural diagram of a bottom bracket of a vacuum cleaner provided in Embodiment 2 of the present invention;

8 is a cross-sectional view of a vacuum cleaner provided in Embodiment 3 of the present invention;

Fig. 9 is an enlarged view at C of Fig. 8;

10 is a schematic structural diagram of a moving impeller of a vacuum cleaner provided in Embodiment 3 of the present invention.

In the picture:

100, air duct; 101, impeller; 102, motor; 103, clearance;

1. Chassis;

2. Bottom bracket; 21. First flow blocking ring; 22. Stopper; 23. Wind deflector; 24. Sealing ring;

3. Cover body; 31. Second blocking ring;

4. Outlet air guide channel;

5. Moving impeller; 51. Flange;

6. Motor;

7. Sealing ring.

detailed description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise expressly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may include direct contact between the first and second features, or may include the first and second features Not directly but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature is directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

The technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments.

Example 1

Referring to FIGS. 2 to 4 , an embodiment of the present invention provides a vacuum cleaner, which includes a casing 1 and a main body part disposed in the casing 1 , and the main body part is a split structure, including a bottom bracket 2 and a bottom bracket 2 arranged on the bottom bracket 2 . The space between the cover body 3, the bottom bracket 2 and the cover body 3 forms an air outlet and air guide channel 4. The air inlet of the air outlet air guide channel 4 is arranged on the bottom bracket 2, and the air inlet of the air outlet air guide channel 4 is arranged in the air inlet. There is a moving impeller 5 , which is configured to discharge the air flow into the air outlet air guide channel 4 .

The cover body 3 is provided with an installation port at the position facing the air inlet, the installation port is provided with a motor 6, and the output shaft of the motor 6 is connected with the moving impeller 5, and the moving impeller 5 is driven by the motor 6 to rotate to guide the air out of the air channel. 4 Internal exhaust. In this embodiment, the outlet air guide passages 4 are U-shaped and distributed around the circumference of the motor 6 , the motor 6 is located in the space enclosed by the cover 3 , and the air inlet is located at the bottom end of the outlet air guide passage 4 .

A flow blocking structure is arranged between the inner wall of the air outlet air guide channel 4 and the moving impeller 5 to prevent the airflow from flowing back along the surface of the moving impeller 5 . The arrangement of the blocking structure can effectively prevent the backflow of the air flow and reduce the leakage of the air volume, thereby improving the efficiency of the motor 6, thereby improving the efficiency and performance of the whole machine.

The flow blocking structure includes a first flow blocking ring 21 arranged on the inner wall of the air outlet and air guide passage 4 , and the first flow blocking ring 21 is annularly arranged on one axial side of the outer edge of the moving impeller 5 . When the moving impeller 5 rotates, the wind enters the air outlet air guide channel 4 from the gap on the moving impeller 5. Since the first baffle ring 21 is arranged on the axial side of the outer edge of the moving impeller 5, it prevents the airflow from passing through the moving impeller. 5 of the blade surface reflow.

Specifically, the first baffle ring 21 is disposed on the bottom bracket 2 , and the inner diameter of the first baffle ring 21 is slightly larger than the outer diameter of the moving impeller 5 . In order to ensure the structural strength, the first baffle ring 21 is integrally formed with the bottom bracket 2 . For ease of understanding, it can also be described that a stepped surface is provided on the bottom bracket 2 on the radially outer side of the impeller 5 to block the gap between the blade surface of the impeller 5 and the air inlet to reduce backflow.

The flow blocking structure further includes a second flow blocking ring 31 arranged on the inner wall of the air outlet and air guide channel 4 , and the second flow blocking ring 31 is arranged on the other axial side of the outer edge of the moving impeller 5 . Since the moving impeller 5 is located in the air inlet, along the axial direction of the moving impeller 5, the two surfaces of the moving impeller 5 are spaced apart from the inner wall of the outlet air guide channel 4. 5. The side close to the air inlet is blocked, and the second baffle ring 31 is arranged to block the side of the moving impeller 5 away from the air inlet to further prevent airflow from backflow and leakage.

Specifically, the second baffle ring 31 is disposed on the cover body 3 , and the inner diameter of the first baffle ring 21 is slightly larger than the outer diameter of the moving impeller 5 . In order to ensure the structural strength, the second baffle ring 31 is integrally formed with the cover body 3 . For ease of understanding, it can also be described that a stepped surface is provided on the cover body 3 on the radially outer side of the impeller 5 to block the gap between the impeller 5 and the air outlet guide passage 4 to reduce backflow.

The first baffle ring 21 and the second baffle ring 31 are disposed opposite to each other and are arranged at intervals along the axial direction of the impeller 5 . The airflow entering from the air inlet can enter the air outlet air guide passage 4 through the gap between the first baffle ring 21 and the second baffle ring 31 , without affecting the smooth flow of the airflow.

The blocking structure also includes a blocking portion 22 arranged around the edge of the air inlet. The blocking portion 22 bends and extends in the direction of the moving impeller 5 and extends into the interior of the moving impeller 5, which can not only block the air inlet, but also can. Redirects the airflow that has a tendency to return to the impeller 5 .

Specifically, the blocking portion 22 is arranged on the bottom bracket 2 , that is, the edge of the air inlet is bent and extended toward the moving impeller 5 , and the blocking portion 22 is facing the gap in the middle of the moving impeller 5 , and will not affect the rotation of the moving impeller 5 . put one's oar in.

Air guide ribs 23 are arranged on the inner wall of the air outlet air guide channel 4, and a plurality of air guide ribs 23 are arranged at intervals around the circumference of the impeller 5 to guide the airflow discharged from the edge of the moving impeller 5 to prevent Make the air flow evenly.

Specifically, the air guide rib plate 23 is arranged on the bottom bracket 2 , and the air guide rib plate 23 and the moving impeller 5 are separated by a certain distance. There is an included angle between the wind deflector rib 23 and the radial direction of the bottom bracket 2 , so that the plurality of wind deflector rib plates 23 form a clockwise or counterclockwise wind guiding trend. The air guide ribs 23 extend toward the cover body 3 and can be in contact with the cover body 3 , so that the airflow entering the air outlet air guide channel 4 from the air inlet flows out between adjacent air guide ribs 23 .

Wherein, the first blocking ring 21 can be provided independently, or can be provided with the blocking portion 22 at the same time to form a double blocking structure, so that the effect of blocking the backflow is better.

Embodiment 2

FIG. 5 to FIG. 7 show the second embodiment, in which the same or corresponding parts as those in the first embodiment are given the corresponding reference numerals with the first embodiment. For simplicity, only the differences between the second embodiment and the first embodiment are described. The difference is that the flow blocking structure includes a sealing ring 24 which is arranged between the inner wall of the outlet air guide channel 4 and the surface of the moving impeller 5 . surface reflow.

The sealing ring 24 may be provided independently, or may be provided at the same time with the first blocking ring 21, so that the effect of blocking the backflow is better.

Since the moving impeller 5 is rotating, and the bottom bracket 2 and the cover body 3 are fixed, the moving impeller 5 rotates relative to the air inlet, so there must be a gap between the moving impeller 5 and the air inlet, even if the gap is small, also exists. In this embodiment, there is a first gap between the lower surface of the moving impeller 5 and the inner wall of the air outlet and air guide channel 4, and the sealing ring 24 is located in the first gap.

A plurality of seal rings 24 are provided at intervals. The multiple sealing rings 24 form multiple flow blocking structures, so that the blocking effect on backflow is better. A plurality of sealing rings 24 are surrounded by layers, even if a small part of the air flow enters the first gap through the gap between the moving impeller 5 and the first baffle ring 21, due to the layer-by-layer obstruction of the sealing ring 24, it is difficult for the air flow to reach the inlet. at the air outlet, thereby preventing backflow at the air inlet.

In this embodiment, two sealing rings 24 are arranged at intervals.

The cross-sectional area of the sealing ring 24 gradually decreases from the inner wall of the air outlet air guide channel 4 toward the direction of the moving impeller 5, so that the contact area between the sealing ring 24 and the surface of the moving impeller 5 is small, and the rotation of the moving impeller 5 is prevented. put one's oar in.

Embodiment 3

FIG. 8 and FIG. 10 show the third embodiment, in which the same or corresponding parts as those in the second embodiment are given the corresponding reference numerals as in the second embodiment. For simplicity, only the differences between the third embodiment and the second embodiment are described. The difference is that the edge of the moving impeller 5 is bent toward the inner wall of the air outlet air guide channel 4 to form a flange, and a sealing ring 7 is sleeved on the flange. The sealing ring 7 further improves the blocking effect and prevents airflow leakage.

The blocking portion 22 can be provided at the same time with the sealing ring 7 to play a dual blocking function. The lower edge of the impeller 5 is bent toward the inner wall of the outlet air guide channel 4 , the sealing ring 7 is located inside the stopper 22 , and the flange cooperates with the stopper 22 to block the edge of the air inlet.

The above embodiments only illustrate the basic principles and characteristics of the present invention, and the present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention also has various changes and changes. These changes and changes are all fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims

A vacuum cleaner having an air outlet and air guide channel (4), a moving impeller (5) is arranged in the air inlet of the air outlet air guide channel (4), and the moving impeller (5) is configured to discharge air into In the air outlet air guide channel (4), it is characterized in that a flow blocking structure is arranged between the inner wall of the air outlet air guide channel (4) and the moving impeller (5), so as to hinder the airflow along the The surface of the impeller (5) returns.
The vacuum cleaner according to claim 1, wherein the flow blocking structure comprises a first flow blocking ring (21) disposed on the inner wall of the air outlet and wind guide passage (4), the first flow blocking structure The ring (21) is arranged on one axial side of the outer edge of the impeller (5).
The vacuum cleaner according to claim 1 or 2, characterized in that, the flow blocking structure comprises a sealing ring arranged between the inner wall of the air outlet air guide channel (4) and the surface of the moving impeller (5). A ring (24), the sealing ring (24) is in contact with the moving impeller (5) to prevent the airflow from flowing back along the surface of the moving impeller (5).
The vacuum cleaner according to claim 3, wherein a plurality of the sealing rings (24) are provided at intervals.
The vacuum cleaner according to claim 3, characterized in that there is a first gap between the lower surface of the moving impeller (5) and the inner wall of the air outlet air guide channel (4), and the sealing ring (24) in the first gap.
The vacuum cleaner according to claim 2, characterized in that, the flow blocking structure further comprises a second flow blocking ring (31) arranged on the inner wall of the air outlet and wind guide passage (4), the second blocking ring (31) The flow ring (31) is arranged on the other side in the axial direction of the outer edge of the impeller (5).
The vacuum cleaner according to claim 6, characterized in that, the first baffle ring (21) and the second baffle ring (31) are disposed opposite to each other and are spaced apart along the axial direction of the moving impeller (5). Arrange.
The vacuum cleaner according to claim 1, wherein the flow blocking structure comprises a blocking part (22) arranged around the edge of the air inlet, and the blocking part (22) faces the moving impeller The direction of (5) is bent and extended and extends into the interior of the moving impeller (5).
The vacuum cleaner according to claim 1, characterized in that the edge of the impeller (5) is bent toward the inner wall of the air outlet and air guide channel (4) to form a flange, and a seal is sleeved on the flange Circle (7).
The vacuum cleaner according to any one of claims 1-9, characterized in that, an air guide rib plate (23) is provided on the inner wall of the air outlet air guide channel (4), and a plurality of the air guide rib plates ( 23) For guiding the airflow discharged from the edge of the moving impeller (5).