CN214511002U - A dust and dirt separation device and a vacuum cleaner - Google Patents

Abstract

The utility model provides a dust separation device and a vacuum cleaner, comprising: a main body, a vacuum motor with a wind wheel is arranged inside; a dust collecting chamber is arranged on the main body, and an air inlet is arranged on the dust collecting chamber; A rotating motor is arranged at the front end of the air inlet of the wind wheel, an output shaft is arranged on the rotating motor, and a filter screen is arranged on the output shaft; The inner diameter of the rotating motor gradually increases in the direction, and one end of the rotating motor toward the rotating motor accommodates the filter screen, and the filter screen is suitable for rotating relative to the dust blocking portion. In this way, the large particles of dust particles will collide with the inner wall of the dust blocking part that they pass through, reducing the kinetic energy and falling into the dust collection chamber, avoiding the destructive impact of the large particles of dust on the filter screen, and can also adhere to the filter. The dust on the surface of the net is thrown off, which improves the filtration efficiency of the filter net and effectively realizes the complete filtration of the air flow.

Description

Dirt and dust separating device and dust collector

Technical Field

The utility model relates to a dust catcher technical field, concretely relates to dirt separator and dust catcher.

Background

Nowadays, economy continues to develop fast, and consumer income continues to increase, especially the rapid growth of big and middle-sized city resident income level, and resident's living condition constantly improves, and the large tracts of land housing is more and more, and the resident also is more and more strong to the demand of dust catcher.

Vacuum cleaner is as common electrical equipment, makes negative pressure environment through built-in motor, inhales the dust catcher with the air that the external world mixes dust and filth inside, through filtering and separation, dust and filth persist in the dust catcher, and clean air is discharged to the external world. Typical dirt separators for vacuum cleaners include porous bag separators or cyclonic separators.

However, after the porous bag type separator is used for a period of time, the small holes on the dust collecting bag are rapidly blocked by dirt, so that the suction force of the dust collector is reduced, after the dust collecting bag is filled, the old bag needs to be thrown away and replaced by a new bag, so that resource waste and environmental pollution are caused, the use cost of a user is increased, and the dirt separation efficiency is low. For the cyclone separator, the airflow carrying dust can form cyclone in the dust collector, and the dust particles have relatively large mass and can be in friction collision with the wall of the container and fall into the dust collecting box under the action of centrifugal force, so that the aim of separating the dust and air is fulfilled.

The prior art provides a dust and dirt separator comprising a foraminous disc at the air flow outlet of the collecting chamber and a motor for rotating the disc. The disk is arranged to rotate about an axis of rotation and includes apertures through which a cleaned airflow passes. The dirt-laden air stream enters the chamber and contacts the rotating turntable, which applies a tangential force to the air stream so that dirt entrained in the air stream moves radially along the surface of the turntable towards the edge of the turntable. During this process, the air flow will exit through the small holes in the turntable, and the dirt therein will continue to move towards the outer radial edge and collect at the bottom of the chamber due to its greater inertia. Compared with a cyclone separator, the separator consumes less vacuum pressure and can be matched with a vacuum motor with less power and noise.

However, in the working process of the separator, all the dirt can impact the rotary disc along with the airflow, and larger particles in the dirt can scrape the rotary disc to affect the normal work of the rotary disc.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming among the prior art dirt separator and having the defect that large granule filth strikes and harm the carousel in the course of the work to a dirt separator and dust catcher are provided.

The utility model also provides a dirt separator, include: the vacuum motor with a wind wheel is arranged in the main body;

the dust collecting cavity is arranged on the main body, and an air inlet is formed in the dust collecting cavity;

the rotating motor is arranged at the front end of the air inlet of the wind wheel, an output shaft is arranged on the rotating motor, and a filter screen is arranged on the output shaft;

the dust blocking part is arranged in the dust collecting cavity, the inner diameter of the dust collecting cavity is gradually increased along the direction back to the rotating motor, the dust blocking part faces towards one end of the rotating motor and accommodates the filter screen, and the filter screen is suitable for being opposite to the dust blocking part to rotate.

The air inlet is arranged on the side wall of the dust collection cavity, and a guide plate is arranged in the air inlet and is suitable for adjusting the extending direction of the air inlet to be tangent to the inner side wall of the dust collection cavity.

The dust collecting cavity is provided with an air passing channel, the air passing channel is connected with one end, facing the rotating motor, of the dust blocking part, extends to the end part of the dust collecting cavity, is communicated with the main body, and is internally provided with the rotating motor.

And the air passing channel is provided with a limiting ring groove which is suitable for accommodating the filter screen and is closely adjacent to the filter screen.

The limiting ring groove is arranged at one end, facing the dust blocking part, of the air passing channel, and the opening of the limiting ring groove is arranged along the direction back to the rotating motor.

The air passing channel faces one end of the main body, a motor support is arranged at one end of the main body, and the motor support is suitable for fixing the rotating motor.

The motor support includes fixed part and a plurality of support column, the fixed part be the cylindric setting, with the rotation motor interference is connected, and the support column is followed fixed part circumference evenly sets up, and connect the fixed part with cross the inner wall of wind passageway.

The dust blocking part is also provided with an annular blocking part, and the annular blocking part is arranged at one end of the dust blocking part, which is far away from the rotating motor, and is connected with the inner wall of the dust collecting cavity.

The filter screen includes trompil region and not trompil region, the trompil region sets up in not trompil region's inside.

The filter screen is characterized in that a plurality of through holes are arranged in the opening area, and the included angle between the longitudinal axis of each through hole and the longitudinal axis of the filter screen is gradually increased along the direction far away from the center of the filter screen.

One side of the filter screen facing the rotating motor is provided with a connecting sleeve which is suitable for being connected with the output shaft.

The main body is further provided with an inner cylinder which is connected with the air passing channel, and the inner diameter of the inner cylinder is equal to that of the air passing channel.

The inner cylinder and the outer wall of the main body are also provided with exhaust holes, and the exhaust holes in the inner cylinder are adjacent to the wind wheel.

The main body is also provided with a vacuum motor mounting part which is suitable for fixing the vacuum motor.

The vacuum motor mounting part is a groove arranged on the inner wall of the end part of the main body.

At least the dust blocking part, the filter screen, the output shaft and the wind wheel are arranged along the same axis.

The dust collecting cavity comprises a dust collecting barrel and a dust collecting cover which are detachably connected.

The utility model also provides a dust catcher, include: the dust-dirt separating device;

one end of the dust collection pipe is connected to the air inlet of the dust and dirt separation device;

and the dust collector head is connected to the other end of the dust collection pipe.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a dirt separator, include: the vacuum motor with a wind wheel is arranged in the main body; the dust collecting cavity is arranged on the main body, and an air inlet is formed in the dust collecting cavity; the rotating motor is arranged at the front end of the air inlet of the wind wheel, an output shaft is arranged on the rotating motor, and a filter screen is arranged on the output shaft; the dust blocking part is arranged in the dust collecting cavity, the inner diameter of the dust collecting cavity is gradually increased along the direction back to the rotating motor, the dust blocking part faces towards one end of the rotating motor and accommodates the filter screen, and the filter screen is suitable for being opposite to the dust blocking part to rotate.

The filter screen and the dust blocking part are arranged at intervals, and the filter screen is only driven to rotate by the rotating motor, the outside air flow flows into the filter screen from the side wall of the dust collecting cavity and forms a circular flow flowing towards the filter screen under the action of the vacuum motor with the wind wheel, on one hand, large particles of dust particles in the air flow move towards the outer side of the circular flow under the centrifugal action, and because the inner diameter of the dust blocking part is gradually reduced towards the direction of the rotating motor, so that the dust can collide with the inner wall of the dust blocking part through which the dust passes, the kinetic energy is reduced and the dust falls into the dust collecting cavity, the destructive impact of large-particle dust on the filter screen is avoided, on the other hand, because the filter screen separates the setting with the dust blocking part to only drive the filter screen through rotating the motor and rotate, reduce the energy consumption, can also get rid of the adhesion and take off the dirt on the filter screen surface, improve the filtration efficiency of filter screen, effectively realize filtering completely to the air current.

2. The utility model provides a dirt separator, the air inlet setting is in on the lateral wall in dust collection chamber, be provided with the guide plate in the air inlet, be suitable for the adjustment the extending direction of air inlet with it is tangent to collect dust the intracavity lateral wall.

Set up like this, after the air current flows into the dust collection chamber, under vacuum motor's negative pressure, can form the circulation that flows towards the filter screen, and the center of circulation is output shaft place axis, makes the large granule filth move towards the dust collection intracavity wall direction under centrifugal action like this to being blockked by dust blocking portion, staying in the dust collection chamber, reduced the impact of large granule filth to the filter screen, guaranteed the filterability of filter screen.

3. The utility model provides a dirt separator, cross and set up spacing annular on the wind passageway, be suitable for and hold the filter screen and with the filter screen next-door neighbour sets up.

Set up spacing annular to hold the filter screen in spacing annular after, can prevent to flow through the interior dirt that exists of wind passageway flowing gas, in the follow passes through and gets into the main part from filter screen and wind passageway inner wall clearance, played supplementary sealed effect.

4. The utility model provides a dirt separator, spacing annular sets up cross the wind passageway orientation the one end of keeping off dirt portion, its opening along dorsad rotate the setting of motor direction.

Because the wind passageway of crossing is connected with the minimum one end of internal diameter of dust-retaining part, so set up like this, on guaranteeing that spacing annular plays supplementary sealed effect basis, for the installation of filter screen provides the space, the operating personnel's of being convenient for install.

5. The utility model provides a dirt separator, be provided with a plurality of through-holes in the trompil region, follow and keep away from the center direction of filter screen, the longitudinal axis of through-hole with the contained angle of the longitudinal axis of filter screen increases gradually.

Through the mode of setting up to the through-hole axis for through-hole self can be relative the dirty direction of motion of dirt and deviate certain angle, avoid dirt direct entry to the through-hole in, cause the jam to the through-hole.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic perspective view of a dust-dirt separating device provided in an embodiment of the present invention;

FIG. 2 is an exploded view of the interior of the dirt-and-dust separating apparatus shown in FIG. 1;

FIG. 3 is an exploded perspective view of the interior of the dirt-and-dust separating apparatus shown in FIG. 2;

FIG. 4 is a schematic perspective view of another angle of the dirt-separating device shown in FIG. 1;

FIG. 5 is a schematic perspective view of another angle of the dirt-separating device shown in FIG. 4;

fig. 6 is a schematic perspective view of another angle of the dirt-separating device shown in fig. 5.

Description of reference numerals:

1-a body; 2-a vacuum motor; 21-a wind wheel; 3-dust collecting chamber; 31-an air inlet; 311-a baffle; 32-a wind channel; 33-a dust collecting cylinder; 34-a dust collection cover; 321-a limit ring groove; 4-rotating the motor; 41-an output shaft; 5, filtering the filter screen; 6-dust blocking part; 51-a connecting sleeve; 61-annular shield; 7-a motor bracket; 71-a stationary part; 72-support column; 11-an exhaust hole; 12-an inner cylinder; 13-vacuum motor mounting.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Referring to fig. 1 to 6, the present embodiment provides a dust and dirt separating apparatus, which includes a main body 1, a dust collecting chamber 3, a rotating motor 4, and a dust blocking portion 6.

The main body 1 is arranged in a cylindrical shape, comprises an inner cylinder 12 which is arranged concentrically and is fixed along one end, a vacuum motor 2 with a wind wheel 21 is arranged on the inner wall of the fixed end, and a negative pressure environment can be generated when the vacuum motor 2 rotates. The dust collecting chamber 3 is connected to the main body 1 in a cylindrical shape, and an air inlet 31 is arranged on the dust collecting chamber 3, in this embodiment, the dust collecting chamber 3 comprises a dust collecting cylinder 33 and a dust collecting cover 34 which are detachably connected, specifically, in a threaded connection, or in a buckling or screwing connection; the rotating motor 4 is arranged on the dust collecting cavity 3, an output shaft 41 is arranged on the rotating motor 4, and a filter screen 5 which is arranged in a disc shape is arranged on the output shaft 41; dust-blocking part 6 is the tube-shape and fixes in dust collecting chamber 3, along the internal diameter crescent of 4 directions of dorsad rotation motor, holds filter screen 5 towards the one end of rotation motor 4, and filter screen 5 can rotate dust-blocking part 6 relatively. In the present embodiment, the output shaft 41 is provided coaxially with the rotation shaft of the vacuum motor 2.

The filter screen 5 and the dust blocking part 6 are arranged in a separated way, the filter screen 5 is only driven to rotate by rotating the motor 4, the filter screen 5 flows into the side wall of the external air flow from the dust collecting cavity 3, and a circular flow flowing towards the filter screen 5 is formed under the action of the vacuum motor 2 with the wind wheel 21, on one hand, large dust particles in the air flow move towards the outer side of the circular flow under the centrifugal action, and because the inner diameter of the dust blocking part 6 towards the rotating motor 4 is gradually reduced, the air flow can collide with the inner wall of the dust blocking part 6 passing by the air flow, the kinetic energy is reduced and falls into the dust collecting cavity 3, the destructive impact of the large dust particles on the filter screen 5 is avoided, on the other hand, because the filter screen 5 and the dust blocking part 6 are arranged in a separated way, and the filter screen 5 is only driven to rotate by rotating the motor 4, the energy consumption is reduced, and the dust adhered to the surface of the filter screen 5 can be thrown and removed, the filtering efficiency of the filter screen 5 is improved, and the complete filtering of the air flow is effectively realized.

An air inlet 31 is provided in the side wall of the dust collecting chamber 3. In this embodiment, a square air adjusting opening is provided in the air inlet 31, a guide plate 311 having an inclined surface is provided in the air inlet 31, and the extending direction of the air inlet 31 can be adjusted to be tangential to the inner wall of the dust collecting chamber 3. Alternatively, the inlet port 31 may extend in a direction that passes through the axis of the output shaft 41.

With the arrangement, after the airflow flows into the dust collection chamber 3, a circulation flow flowing towards the filter screen 5 can be formed under the negative pressure action of the vacuum motor 2, and the center of the circulation flow is the axis of the output shaft 41, so that large-particle dirt moves towards the inner wall direction of the dust collection chamber 3 under the centrifugal action, is blocked by the dust blocking part 6 or the inner wall of the dust collection chamber 3 and is left in the dust collection chamber 3, the impact of the large-particle dirt on the filter screen 5 is reduced, and the filtering performance of the filter screen 5 is ensured.

In this embodiment, the dust collecting chamber 3 is further provided with an air passage 32, and the shape of the air passage 32 can be adjusted as required, and in this embodiment, the air passage is in a straight cylinder shape, is connected to one end of the dust blocking part 6 facing the rotating motor 4, extends to the end part of the dust collecting chamber 3, is communicated with the main body 1, and is internally provided with the rotating motor 4. As an alternative embodiment, the air passage 32 may be provided in the main body 1, or the air passage 32 may not be provided, and its internal structure may be provided in the dust guard 6 or the main body 1.

The air passage 32 is provided with a limiting ring groove 321 which can accommodate the filter screen 5 and is arranged adjacent to the filter screen 5. Set up spacing annular 321 to hold filter screen 5 back in spacing annular 321, can prevent to flow the dirt that exists in the air channel 32 flowing gas, from filter screen 5 and the air channel 32 inner wall clearance from passing through and getting into in the main part 1, played supplementary sealed effect.

In this embodiment, a limiting ring groove 321 is provided at an end of the air passage 32 facing the dust guard 6, and an opening thereof is provided in a direction away from the rotating electrical machine 4. As an alternative embodiment, the limiting ring groove 321 may be an annular groove that opens toward the central axis of the air passage 32 and is disposed in the middle of the air passage 32. Because the air passing channel 32 is connected with the end with the smallest inner diameter of the dust blocking part 6, the arrangement provides space for the installation of the filter screen 5 on the basis of ensuring the effect that the limiting ring groove 321 plays a role in supplementary sealing, and is convenient for operators to install.

The air passage 32 is provided with a motor bracket 7 towards one end of the main body 1, and the motor bracket 7 can fix the rotating motor 4.

The specific form of the motor support 7 is not limited, and it is enough to cross the wind and fix the rotating motor 4, as a preferred embodiment, the motor support 7 includes a fixing portion 71 and a plurality of supporting columns 72, the fixing portion 71 is in a cylindrical shape and is in interference connection with the rotating motor 4, and the supporting columns 72 are uniformly arranged along the circumferential direction of the fixing portion 71 and are connected with the fixing portion 71 and the inner wall of the wind passing channel 32. The arrangement ensures stable support of the rotating motor 4, reduces the blocking effect on the airflow and ensures stable flow of the airflow.

In addition, the dust blocking part 6 is further provided with an annular shielding part 61, and the annular shielding part 61 is arranged at one end of the dust blocking part 6 far away from the rotating motor 4 and is connected with the inner wall of the dust collection cavity 3. The setting of annular shielding part 61 can further shelter from the large granule dirt that moves to the 3 inner walls of dust collection chamber under the centrifugal force effect, effectively avoids the dirty striking of dirt to have the regional filter house of trompil, guarantees filter screen 5 filtering quality's stability.

The filter screen 5 is arranged in a disc shape, and in the embodiment, the specific structure of the filter screen 5 is not limited too much, and through holes can be formed in the whole diameter range. In a preferred embodiment, the filter screen 5 includes an open area and a non-open area, and the open area is disposed inside the non-open area. Specifically, the non-perforated region itself has a ring-shaped structure. A plurality of through holes are arranged in the opening area, and the included angle between the longitudinal axis of each through hole and the longitudinal axis of the filter screen 5 is gradually increased along the direction far away from the center of the filter screen 5. Through the mode of setting up to the through-hole axis for through-hole self can be relative the dirty direction of motion of dirt and deviate certain angle, avoid dirt direct entry to the through-hole in, cause the jam to the through-hole.

The side of the filter screen 5 facing the rotation motor 4 is provided with a coupling sleeve 51, the coupling sleeve 51 being adapted to couple with the output shaft 41.

Specifically, the connection sleeve 51 is provided at an axial position of the filter screen 5 and extends toward the direction of the rotating motor 4. The connection mode between the connection sleeve 51 and the output shaft 41 is not limited too much, and may be interference connection, or may be screw connection, or may be connection by drilling holes in the connection sleeve 51 and the output shaft 41, respectively, and then placing pins in the holes.

The main body 1 is also internally provided with an inner cylinder 12, the inner cylinder 12 is connected with the air passing channel 32, and the inner diameter of the inner cylinder 12 is equal to the inner diameter of the air passing channel 32. The arrangement ensures the normal wind passing, avoids the impact of sudden change of the airflow on the wind wheel 21, reduces the noise and prolongs the service life of the wind wheel 21.

In addition, the outer walls of the inner cylinder 12 and the main body 1 are provided with exhaust holes 11, the two exhaust holes 11 are correspondingly arranged, so that exhaust is facilitated, and the exhaust holes 11 in the inner cylinder 12 are arranged adjacent to the wind wheel 21, so that clean air can be conveniently exhausted to the outside. In the present embodiment, the exhaust holes 11 include a plurality of circular apertures arranged in a uniform square. The exhaust port 11 may be a plurality of uniform long holes as an alternative embodiment, and a grille or cover structure may be provided outside the exhaust port 11 as a dust blocking device in a non-operating state as another alternative embodiment.

The main body 1 is further provided with a vacuum motor mounting part 13 capable of fixing the vacuum motor 2. In this embodiment, the vacuum motor mounting part 13 is a groove provided on the inner wall of the inner cylinder 12 facing away from the dust collecting chamber 3. The recess sets up on the extension line of output shaft 41, and vacuum motor 2 one end is fixed on the recess through the mode of interference connection, through setting up the recess, can realize the stability of vacuum motor 2 self, avoids vacuum motor 2 to take place to rock. As an alternative embodiment, the vacuum motor mounting portion 13 may also be configured as a motor bracket 7 provided in the main body 1.

At least the dust blocking part 6, the filter screen 5, the output shaft 41 and the wind wheel 21 are arranged along the same axis. In a preferred embodiment, in the present embodiment, the main body 1, the vacuum motor mounting portion 13, the inner cylinder 12, the rotating motor 4, the air flow passage 32, the stopper ring groove 321, the motor holder 7, and the like are arranged on the same axis as the above-described structure. As an alternative embodiment, some of the structures of the main body 1, the vacuum motor mounting portion 13, the inner cylinder 12, the rotating motor 4, the air passage 32, the stopper ring groove 321, the motor holder 7, and the like may be arranged non-coaxially with other structures.

The present embodiment also provides a vacuum cleaner, including: the dust and dirt separating device, the dust suction pipe and the dust collector head are arranged on the base. One end of the dust suction pipe is provided with an air inlet 31 connected with the dust and dirt separating device, and the head of the dust collector is connected with the other end of the dust suction pipe.

After dirt separator starts, vacuum motor 2 work produces the negative pressure, and the negative pressure will be through the dust catcher head with dirt through the dust absorption pipe inhale to dirt separator to the realization is to the accomodating of dirt self.

In the embodiment, the handle can be directly arranged on the dust and dirt separating device, so that the handheld dust collector is formed, and when dust collection operation is needed, a user can directly hold the handle by hands to realize the dust collection operation. As a variation, the dirt separator may be disposed in the dust suction barrel, and at this time, the user holds the dust suction pipe by hand, and dirt and the like generated during the cleaning process will enter the dust suction barrel to be collected, and at the same time, a roller is disposed in the dust suction barrel so as to move along with the user.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious changes and modifications can be made without departing from the scope of the invention.

Claims (18)

1. A dirt-and-dust separating apparatus, comprising:

the vacuum fan comprises a main body (1), wherein a vacuum motor (2) with a wind wheel (21) is arranged in the main body;

the dust collection chamber (3) is arranged on the main body (1), and an air inlet (31) is arranged on the dust collection chamber (3);

the rotating motor (4) is arranged at the front end of the air inlet of the wind wheel (21), an output shaft (41) is arranged on the rotating motor (4), and a filter screen (5) is arranged on the output shaft (41);

the dust blocking part (6) is arranged in the dust collecting cavity (3), the inner diameter of the dust collecting cavity is gradually increased along the direction back to the rotating motor (4), the dust blocking part faces one end of the rotating motor (4) and contains the filter screen (5), and the filter screen (5) is suitable for rotating relative to the dust blocking part (6).

2. Dust and dirt separating device according to claim 1, characterized in that the air inlet (31) is arranged in a side wall of the dust collecting chamber (3), and a deflector (311) is arranged in the air inlet (31) and adapted to adjust the extension direction of the air inlet (31) to be tangential to the inner side wall of the dust collecting chamber (3).

3. A dust and dirt separating apparatus according to claim 1 or 2, wherein an air passage (32) is provided in the dust collecting chamber (3), and the air passage (32) is connected to an end of the dust blocking portion (6) facing the rotating motor (4), extends to an end of the dust collecting chamber (3), communicates with the main body (1), and is provided with the rotating motor (4) therein.

4. A dust-dirt separating apparatus according to claim 3, characterised in that the air passage (32) is provided with a limiting ring groove (321) adapted to receive the filter screen (5) and arranged in close proximity to the filter screen (5).

5. The dirt-and-dust separating apparatus according to claim 4, wherein the retainer ring groove (321) is provided at an end of the air passage (32) facing the dust retaining portion (6), and an opening thereof is provided in a direction away from the rotating motor (4).

6. Dust and dirt separating device according to claim 5, characterized in that the air passage (32) is provided with a motor bracket (7) towards one end of the main body (1), the motor bracket (7) being adapted to fix the rotating motor (4).

7. The dust-dirt separating device according to claim 6, characterized in that the motor bracket (7) comprises a fixing portion (71) and a plurality of supporting columns (72), the fixing portion (71) is arranged in a cylindrical shape and is in interference connection with the rotating motor (4), and the supporting columns (72) are uniformly arranged along the circumferential direction of the fixing portion (71) and are connected with the fixing portion (71) and the inner wall of the air passing channel (32).

8. The dust-dirt separating device according to claim 6 or 7, characterized in that the dust-blocking portion (6) is further provided with an annular shielding portion (61), and the annular shielding portion (61) is arranged at one end of the dust-blocking portion (6) far away from the rotating motor (4) and connected with the inner wall of the dust-collecting chamber (3).

9. Dust and dirt separating device according to any one of claims 1-2, 6-7, characterized in that the filter screen (5) comprises an open area and a non-open area, the open area being arranged inside the non-open area.

10. Dust and dirt separating device according to claim 9, characterized in that a number of through holes are provided in the area of the opening, the angle between the longitudinal axis of the through holes and the longitudinal axis of the filter screen (5) increasing in the direction away from the centre of the filter screen (5).

11. Dust and dirt separating device according to claim 10, characterized in that the side of the filter screen (5) facing the rotating motor (4) is provided with a connecting sleeve (51), which connecting sleeve (51) is adapted to connect the output shaft (41).

12. The dust and dirt separating device according to claim 3, characterized in that the main body (1) is further provided with an inner cylinder (12) connected with the air passing channel (32), and the inner diameter of the inner cylinder (12) is equal to the inner diameter of the air passing channel (32).

13. The dust-dirt separating device according to claim 12, characterized in that the inner cylinder (12) and the outer wall of the main body (1) are further provided with exhaust holes (11), and the exhaust holes (11) on the inner cylinder (12) are arranged adjacent to the wind wheel (21).

14. A dirt-and-dust separating apparatus according to claim 13, characterised in that the main body (1) is further provided with a vacuum motor mounting portion (13) adapted to secure the vacuum motor (2).

15. A dirt-and-dust separating apparatus according to claim 14, characterised in that the vacuum motor mounting portion (13) is a groove provided on an inner wall of an end portion of the main body (1).

16. Dust and dirt separating device according to claim 1, characterized in that at least the dust retaining part (6), the filter screen (5), the output shaft (41) and the wind wheel (21) are arranged along the same axis.

17. Dust and dirt separating device according to claim 1, characterized in that the dust collecting chamber (3) comprises a dust collecting container (33) and a dust collecting cover (34) which are detachably connected.

18. A dust collector is characterized by comprising

The dirt-and-dust separating apparatus of any one of claims 1 to 17;

one end of the dust collection pipe is connected with an air inlet (31) of the dust and dirt separation device;

and the dust collector head is connected to the other end of the dust collection pipe.

Images