WO2018103618A1

WO2018103618A1 - Hand-held vacuum cleaner

Info

Publication number: WO2018103618A1
Application number: PCT/CN2017/114550
Authority: WO
Inventors: 张志伟
Original assignee: 科沃斯机器人股份有限公司
Priority date: 2016-12-06
Filing date: 2017-12-05
Publication date: 2018-06-14
Also published as: CN206630546U

Abstract

A hand-held vacuum cleaner mainly comprises a main body and cleaning accessories attached thereto. The main body comprises a machine body (2) and a separation device connected to the machine body (2). The separation device is provided with a cleaning tube (1) thereon used for the cleaning accessories to connect to the main body therethrough. The machine body (2) is provided with a motor (3) at a rear side of an upper part thereof, a battery pack (7) for powering the motor (3), and a handle (6) located at one side of the machine body (2). The separation device comprises a primary filter, a secondary filter located downstream of the primary filter and a dust bin (8). The primary filter is in communication with the cleaning tube (1). The secondary filter comprises multiple secondary cyclone cones (10) arranged side by side. An included angle α between a central axis Z of the secondary filter and an air inlet/outlet axis Y of the motor (3) is in a range of 0°≤α＜90°. The vacuum cleaner effectively shortens the air inlet duct before the motor (3), enables smooth air flow, prevents the motor (3) from performance loss due to the air duct, maximizes the performance of the motor (3), and at the same time has compact structure and high efficiency of vacuum cleaning.

Description

Handheld vacuum cleaner

Technical field

The invention relates to a hand-held vacuum cleaner, belonging to the technical field of small household appliance manufacturing.

Background technique

The hand-held vacuum cleaner is small in size and easy to use. The layout of the dust bucket filter system inside the body plays an important role in vacuuming. At present, the layout of the dust filter system of the hand-held vacuum cleaner on the market mainly includes two types: FIG. 1 is a schematic diagram of the internal structure of the Dyson hand-held vacuum cleaner. As shown in Figure 1, the Dyson handheld product is provided with a first-stage cyclone 100 and a plurality of cyclones 200 composed of a plurality of cyclones, and the first and second cyclones are arranged in a coaxial upper and lower arrangement. FIG. 2 is a schematic diagram showing the internal structure of a conventional hand-held vacuum cleaner in China. As shown in Fig. 2, a dust blower 100 is usually provided with a primary cyclone 100 and a secondary cyclone 200' composed of a single cyclone, and the secondary cyclone 200' is built in or partially built into the primary cyclone 100.

In addition, the European Patent Publication No. EP2043494B1 discloses a hand-held cleaning device which, since the secondary cyclone is coaxially disposed above the primary cyclone, extends the overall height of the dust bucket while the motor air inlet Vertical relationship with the cyclone is not conducive to the motor inlet air, affecting product performance. At the same time, such a layout limits the position of the filter cotton in front of the motor, causing interference to the overall shape design of the product.

Also, the Chinese patent publication CN105496302A discloses a hand-held cleaning device. Since the secondary cyclone of the product has only one cyclone cone, the dust separation effect is not good. And the primary filter extends to the bottom of the dust bucket, which occupies the volume of the dust bucket to some extent. Although this type of product has a dust-proof ring on the primary filter, the floating ash at the bottom of the dust bucket still has the opportunity to be brought up by the rotating airflow, thereby affecting the filtering effect.

Summary of the invention

The technical problem to be solved by the present invention is to provide a hand-held vacuum cleaner according to the deficiencies of the prior art, which effectively shortens the forward wind channel of the motor, is more conducive to smooth flow of the airflow, and maximizes protection of the performance of the motor from wind tunnel loss. To make it play a better separation, the performance of the motor is fully released; at the same time, the product size is effectively reduced, the product space is fully utilized, and the dust collection efficiency is greatly improved.

The technical problem to be solved by the present invention is achieved by the following technical solutions:

A hand-held vacuum cleaner mainly comprises a main body and a dust suction attachment connected thereto, the main body comprising a fuselage and a separating device connected to the fuselage, the separating device is provided with a dust suction pipe for connecting the dust suction accessory On the main body, the upper rear side of the fuselage is provided with a motor, a battery pack for supplying power to the motor, and a handle on one side of the fuselage. The separating device comprises a primary filter, a secondary filter downstream of the primary filter and a dust bucket, the primary filter is in communication with the suction pipe, and the secondary filter comprises a plurality of secondary cyclones arranged side by side The angle between the center line Z of the secondary filter and the motor inlet and outlet axis Y is in the range of 0° ≤ α < 90°.

Further, the outlet end of the secondary filter is connected to the motor through a motor advancing duct, and the secondary filter is further provided with a dust guiding tube communicating with the dust bucket, and the connecting portion of the dust guiding tube and the dust bucket is The second-stage ash outlet is disposed on a side close to the dust suction pipe.

In order to achieve a better vacuuming effect, a pre-motor filter cotton is provided at the outlet end of the secondary filter. Further, the primary filter is integrally disposed on the dust bucket, and includes a primary filter barrel disposed inside the dust bucket, and the bottom of the barrel is provided with a first-stage ash outlet; the dust bucket The bottom is provided with a bottom cover, and the space inside the dust bucket and the outside of the barrel is a ash storage chamber; a filter assembly is arranged inside the first filter barrel and concentrically, the filter assembly includes a filter bracket and is arranged in the filter The filter on the mesh bracket.

In order to avoid clogging, the primary ash outlet is provided on the side remote from the suction pipe.

In order to facilitate processing and disassembly, the primary filter barrel is integrally formed.

In addition, in order to facilitate dust generation, the first-stage ash outlet is disposed on the side wall of the barrel.

For thorough dust removal, the upper edge position of the primary ash outlet is not higher than the lower edge of the screen assembly.

In order to make the structure more compact, the secondary cyclone cone is at or partially on the motor inlet and outlet wind axis Y.

Additionally, the axis X of the primary filter passes through or partially through the secondary cyclone cone.

In summary, the present invention provides a hand-held vacuum cleaner, which effectively shortens the forward wind channel of the motor, is more conducive to smooth flow of the airflow, and maximizes the protection of the performance of the motor from the loss of the air passage, so as to exert a better separation effect. The performance of the motor is fully released; at the same time, the product size is effectively reduced, the product space is fully utilized, and the dust collection efficiency is greatly improved.

The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

DRAWINGS

Figure 1 is a schematic view showing the internal structure of a Dyson hand-held vacuum cleaner;

2 is a schematic view showing the internal structure of a conventional hand-held vacuum cleaner in China;

Figure 3 is a cross-sectional view showing the main structure of the present invention;

Figure 4 is a schematic view showing the explosion of the dust bucket structure of the present invention;

Figure 5 is a schematic view showing the external structure of the dust bucket of the present invention;

Figure 6 is a schematic view showing the structure of a primary filter in the dust bucket of the present invention;

Figure 7 is a radial sectional view of the dust bucket of the present invention;

Figure 8 is a schematic view showing the structure of a secondary filter in the dust bucket of the present invention.

detailed description

3 is a cross-sectional view of the main structure of the present invention; FIG. 4 is a schematic view showing the structure of the dust bucket structure of the present invention; FIG. 5 is a schematic view showing the external structure of the dust bucket of the present invention; A radial sectional view of the dust bucket of the invention is shown; Fig. 8 is a schematic view showing the structure of the secondary filter in the dust bucket of the present invention. As shown in FIG. 3 to FIG. 8 , the present invention provides a hand-held vacuum cleaner, which mainly comprises a main body and a dust suction attachment connected thereto, the main body comprising a body 2 and a separating device connected to the body 2, the separating device There is a dust suction pipe 1 for attaching the dust suction attachment to the main body. The upper rear side of the body 1 is provided with a motor 3, a battery pack 7 for supplying power to the motor 3, and a handle 6 on the side of the body 1. The separation device comprises a primary filter, a secondary filter located downstream of the primary filter, and a dust bucket 8, the primary filter being in communication with the suction pipe 1, the secondary filter comprising a plurality of two arranged side by side The vortex cone 10 has an angle α between the center line Z of the secondary filter and the motor inlet and outlet axis Y: 0° ≤ α < 90°. Due to the presence of the angle α, the dust generated by the separation of the secondary cyclone 10 can be subjected to multiple actions of centrifugal force and gravity, and enters the ash chamber 82 through the dust duct 19. Dust is prevented from remaining in the secondary cyclone cone 10. Wherein, the motor inlet and outlet wind axis Y is perpendicular to the dust barrel and the primary filter axis X. Preferably, the secondary cyclone 10 is at or partially on the motor inlet and outlet axis Y, and is effectively shortened due to the presence of the angle α. The motor advances the wind duct, which is more conducive to the smooth flow of the airflow and is beneficial to the release of the performance of the motor. At the same time, the product size of the hand-held vacuum cleaner is effectively reduced, and the product space is utilized more effectively.

Further, the secondary filter is a secondary cyclone filter, comprising a filter body composed of a plurality of secondary cyclone cones 10 symmetrically arranged, and the center line Z of the secondary filter is a plurality of secondary cyclones A symmetrical center of the cone, the secondary inner cone 15 being provided in the cyclone filter cone. The setting of the secondary cyclone cone 10 effectively filters the floating dust that has not been separated by the primary filter. This increases the filter level of the vacuum cleaner. The working pressure of the filter cotton 11 in front of the motor is greatly reduced, and the use period of the filter cotton 11 before the motor is remarkably improved. At the same time, the motor is effectively protected from ash. In order to make the structure more compact, it is preferred that the dust drum and the primary filter axis X pass through or partially pass through the secondary cyclone 10, which effectively shortens the wind between the primary filter and the secondary cyclone 10 The length of the track maximizes the protection of the motor performance from the loss of the air duct, making the secondary cyclone 10 a better separation.

The outlet end of the secondary filter is connected to the motor 3 through a motor advancing duct 28, and the secondary filter is further provided with a dust guiding tube 19 communicating with the dust barrel 8, the dust guiding tube 19 and the dust barrel 8 The connection is a secondary ash outlet 191, which is disposed on the side close to the suction pipe 1. In order to achieve a better vacuuming effect, a pre-motor filter 11 is provided at the outlet end of the secondary filter. Here, the pre-motor filter cotton 11 is of the prior art, and the pre-motor filter 11 is arranged to prevent extremes, after extreme filtration, after the secondary cyclone 10 is filtered. The remaining dust enters the motor directly with the airflow. One side of the dust suction pipe 1 is provided on the front side of the hand-held vacuum cleaner, and the second-stage ash discharge port 191 is located in front of the first-stage ash discharge port 811. Preferably, the primary filter axis X need not be concentric with the axis of the dust bucket 8.

Further, in order to solve the deficiencies of the prior art, the present invention integrates the primary filter on the dust bucket 8, and includes a primary filter barrel 81 that is sleeved inside the dust bucket, and the bottom of the barrel There is a first level ash outlet 811. The bottom of the dust bucket is provided with a bottom cover 27, and the bottom of the dust bucket 8 is further provided with a ash storage chamber 82, which is a space between the inside of the dust bucket and the outside of the bucket. The primary filter barrel 81 is not directly connected to the dust bottom cover 27, and the ash storage capacity is maximized for the ash storage chamber 82. A filter assembly 9 is disposed inside the first filter barrel and concentrically, and the filter assembly includes a sieve support 91 and a filter 92 disposed on the filter support. The filter 92 belongs to the prior art and can be in the form of It is a plastic woven mesh, a metal woven mesh and a metal etched mesh. The primary filter barrel 81 is integrally formed for ease of processing and disassembly. In order to prevent the primary ash outlet 811 from being blocked due to the dust ash chamber 82 being full, the primary ash outlet 811 is disposed on the side away from the dust suction pipe 1. In addition, in order to improve the separation efficiency, the primary ash outlet 811 is disposed on the side wall of the barrel 81. Preferably, the upper edge position of the primary ash outlet 811 is not higher than the lower edge of the screen assembly 9. Of course, the primary ash outlet 811 can also be opened at the bottom of the primary filter barrel 81.

Referring to Figures 3 to 8, the working process of the present invention is as follows:

When the vacuum cleaner is working, the dust is tangentially flowed by the dust suction pipe 1 into the primary filter with the air flow, and is rapidly rotated and separated. Most of the dust particles are centrifuged from the primary ash outlet 811 to the first stage filter barrel 81 into the ash storage chamber 82. Since the ash chamber 82 belongs to the vacuum chamber and there is no high-speed rotating airflow in the ash chamber 82, once the dust particles enter the ash chamber 82, they will no longer enter the primary filter, thereby avoiding affecting the primary filtration effect. The gas stream in the primary filter is filtered and enters the screen assembly 9. The airflow passes through the primary filter and the dust that is not effectively filtered by the filter assembly 9, and enters the secondary vacuum chamber 21 from the air outlet at the top of the filter assembly 9. It is then tangentially directed into a secondary filter having a plurality of secondary cyclone cones 10. After being filtered again by the secondary cyclone 10, the dust enters the ash chamber 82 through the dust guide tube 19 by multiple actions of centrifugal force and gravity. The filtered airflow passes through the motor before the filter cotton 11 enters the motor from the inlet duct 28. Thereby achieving the function of using the vacuum cleaner.

Claims

A hand-held vacuum cleaner mainly comprises a main body and a dust suction attachment connected thereto, the main body comprising a fuselage (2) and a separating device connected to the fuselage, the separating device is provided with a dust suction pipe (1), Attaching a vacuum attachment to the main body, the upper rear side of the fuselage is provided with a motor (3), a battery pack (7) for supplying power to the motor, and a handle (6) on one side of the fuselage, The separation device comprises a primary filter, a secondary filter located downstream of the primary filter, and a dust bucket (8), the primary filter being in communication with the suction pipe, the secondary filter comprising a plurality of secondary stages arranged side by side The cyclone cone (10) is characterized in that the angle α between the center line Z of the secondary filter and the motor inlet and outlet wind axis Y ranges from 0° ≤ α < 90°.
The hand-held vacuum cleaner according to claim 1, wherein the air outlet end of the secondary filter is connected to the motor (3) through a motor advancing duct (28), and the secondary filter is further provided with a dust guiding tube (19) connected to the dust bucket (8), the connection between the dust guiding tube and the dust barrel is a secondary ash outlet (191), and the secondary ash outlet is arranged near the dust suction pipe (1) One side.
The hand-held vacuum cleaner according to claim 2, wherein the outlet end of the secondary filter is provided with a motor front filter cotton (11).
The hand-held vacuum cleaner according to claim 2, wherein the primary filter is integrally disposed on the dust bucket (8), and includes a primary filter barrel (81) disposed inside the dust bucket. a first-stage ash outlet (811) is arranged at the bottom of the first-stage filter barrel;

The bottom of the dust bucket is provided with a bottom cover (27), and the space inside the dust bucket and the outside of the barrel is a ash storage chamber (82);

A filter assembly (9) is disposed inside the primary filter barrel and concentrically, the filter assembly including a filter support (91) and a filter (92) disposed on the filter support.
A hand-held vacuum cleaner according to claim 4, wherein said primary ash outlet (811) is disposed on a side away from the suction pipe (1).
A hand-held vacuum cleaner according to claim 4, wherein said primary filter barrel (81) is integrally formed.
A hand-held vacuum cleaner according to claim 6, wherein said primary ash outlet (811) is disposed on a side wall of said barrel (81).
A hand-held vacuum cleaner according to claim 6, wherein the upper edge position of said primary ash outlet (811) is not higher than the lower edge of said screen assembly (9).
A hand-held vacuum cleaner according to claim 4, wherein said secondary cyclone (10) is at or partially on said motor inlet and outlet axis Y.
A hand-held vacuum cleaner according to claim 4, characterized in that the axis X of the primary filter passes through or partially passes through the secondary cyclone (10).