CN118058650A - Dust collecting device and cleaning equipment - Google Patents

Abstract

The application provides a dust collecting device and cleaning equipment, wherein the dust collecting device comprises a fan, an air duct structure with a dust collecting air duct formed inside and a filtering component positioned in the dust collecting air duct, and the fan is connected with an air outlet of the air duct structure and is used for sucking air flow in the dust collecting air duct; the dust collection air duct comprises a first air duct, a dust collection cavity and a second air duct which are communicated with each other, the first air duct is arranged at an air inlet of the dust collection cavity, the second air duct is arranged between an air outlet of the dust collection cavity and the fan, and the filtering component is arranged at the air outlet of the dust collection cavity; the air inlet and the air outlet of the dust collection cavity are both positioned at the upper part of the dust collection cavity, and the first air duct is arranged to extend from bottom to top along the direction of air flow. In the technical scheme provided by the application, the dust collection effect and the dust-gas separation effect of the dust collection air duct are good.

Description

Dust collecting device and cleaning equipment

Technical Field

The application relates to the technical field of cleaning, in particular to a dust collecting device and cleaning equipment.

Background

With the development of intelligent technology, various types of cleaning equipment such as cleaning robots and dust collectors enter daily life of people. In the cleaning process of the cleaning equipment, vacuum is formed in the main machine by high-speed rotation of the fan, and dirt on the ground is sucked into the dust collection box in the main body from the suction inlet by utilizing the high-speed airflow generated by the vacuum, so that the collection and treatment of the dirt on the ground are realized.

However, various types of cleaning apparatuses such as conventional cleaning robots, cleaners, etc., are affected by the structure of the dust collection duct therein, so that the conventional cleaning apparatuses have low dust collection efficiency and poor dust-gas separation effect.

In view of the foregoing, it is desirable to provide a new dust collecting device that solves the above-mentioned problems.

Disclosure of Invention

In order to solve the technical problems, the application provides a dust collecting device and cleaning equipment using the same, so as to solve the problems of low dust collecting efficiency and poor dust-gas separation effect of the dust collecting device in the prior art.

According to one aspect of the present application, there is provided a dust collecting device comprising a fan, a dust collecting duct connected to the fan, and a filter member disposed in the dust collecting duct, the fan being connected to one side of the dust collecting duct for driving a flow of an air flow in the dust collecting duct; the dust collection air duct comprises a first air duct, a dust collection box and a second air duct which are communicated with each other, the first air duct is arranged at an air inlet of the dust collection box, and the second air duct is arranged between an air outlet of the dust collection box and the fan; the center of the air inlet and the center of the air outlet are both positioned above the height center line of the dust collecting box, the first air channel extends obliquely from bottom to top along the flowing direction of dust-containing air flow entering the dust collecting device, and the dust-containing air flow flows along the first air channel, the top wall of the dust collecting box and the second air channel, so that a high-pressure separation area and a low-pressure dust collecting area which are vertically distributed are formed in the dust collecting box.

As a further improvement of the invention, the centroid of the first air duct and/or the centroid of the second air duct are/is located above the dust box height center line.

As a further improvement of the invention, the center of the air inlet is positioned above 60% of the height of the dust box; and/or the center of the air outlet is positioned at more than 50% of the height of the dust collection box.

As a further improvement of the present invention, the dust box has oppositely disposed top and bottom walls and side walls for connecting the top and bottom walls, and the first air duct and the second air duct are disposed on the oppositely disposed two side walls.

As a further improvement of the present invention, the dust collecting device comprises a filter member detachably connected to the air outlet.

As a further improvement of the invention, the fan comprises a volute, a centrifugal fan accommodated in the volute and a motor for driving the centrifugal fan to rotate, the fan is obliquely arranged, and an included angle between the axial extension direction of the fan and the horizontal plane is 0-45 degrees.

As a further improvement of the invention, the centroid of the volute is located above the dust box height centerline.

As a further improvement of the invention, the function curve of the spiral contour line of the volute is:

Wherein g is a gap between a volute tongue of the volute and the centrifugal fan, R1 is a radius of the centrifugal fan, e is a natural constant, B is a height of an inner cavity of the volute, B is a chord length of a fan blade of the centrifugal fan, and ω is an envelope angle of the volute.

As a further improvement of the invention, the envelope angle ω of the volute is less than 270 °; the gap g between the volute tongue of the volute and the centrifugal fan is 3-7 mm.

As a further improvement of the invention, the volute comprises an air supply port connected with the second air duct and an air outlet formed at the peripheral edge of the volute, and the area of the air outlet is 1.8-2.8 times that of the air supply port.

As a further improvement of the invention, the width D of the air outlet is 0.8 to 1.3 times the diameter of the centrifugal fan.

As a further improvement of the invention, the outlet angle alpha of the centrifugal fan blade is 30-45 degrees; and/or the central angle beta corresponding to the chord length of the fan blade of the centrifugal fan is 60-100 degrees.

As a further improvement of the invention, the motor comprises a motor main body and a connecting bearing for connecting the volute, and a rotating shaft of the motor penetrates through the bearing and stretches into the volute to be connected with the centrifugal fan.

According to another aspect of the present application, there is provided a cleaning apparatus comprising the dust collecting device as described above.

The beneficial effects of the application are as follows:

Through setting up the arrangement structure in the dust collection wind channel in the dust collection device, effectively reduced the bending in dust collection wind channel for the dirty gas that gets into in the dust collection wind channel flows along the upper portion high speed in dust collection wind channel, avoided the dirty air current to cause because of the collision in the dust collection wind channel wind-force loss, reduced the windage that dirty gas flows, promote the pneumatic efficiency that dust collection wind channel drove dirty gas flow, realized dust collection device's high-efficient collection, then make the cleaning device who uses this integrated device have good dust collection effect.

Through setting up the combined form between the setting position of dust collection box and first wind channel, the second wind channel in the dust collection device for form high pressure separation district and the low pressure dust collection district that upper and lower subregion was arranged in the dust collection box, make the dust impurity etc. that wraps up in the dust-laden gas fall into the separation of dust impurity etc. and gas in the dust-laden air current in the low pressure dust collection district from the high pressure separation district that is located upper portion under the action of gravity.

Meanwhile, through the structure of the fan, the efficiency of the fan can be effectively improved, the wind pressure during the operation of the fan is improved, the dust collection power of the dust collection air duct connected to the fan is further improved, the noise during the operation of the fan is further reduced, and the cleaning device using the dust collection device has good dust collection effect and lower operation noise.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application, illustrate and explain the application and are not to be construed as limiting the application. Attached at

In the figure:

fig. 1 is a schematic view showing a structure of a dust collecting device according to an embodiment of the present application;

FIG. 2 is a schematic flow field diagram of the integrated device of FIG. 1;

FIG. 3 is a schematic view of a blower according to an embodiment of the present application;

FIG. 4 is a schematic view of the blower of FIG. 3 from another perspective;

FIG. 5 is a schematic view of the fan shown in FIG. 2 in an exploded configuration;

FIG. 6 is a schematic diagram of a cut-away configuration of a blower according to one embodiment of the application;

FIG. 7 is a schematic view of the top cover interior structure of the volute in accordance with one embodiment of the application;

FIG. 8 is a schematic view of the internal structure of the bottom cover of the volute in accordance with one embodiment of the application;

fig. 9 is a schematic structural view of a centrifugal fan according to an embodiment of the present application;

FIG. 10 is a schematic view of a centrifugal fan blade according to an embodiment of the present application;

FIG. 11 is a schematic view of a structure of a cleaning apparatus according to an embodiment of the present application;

FIG. 12 is a schematic view of a disassembled structure of the cleaning apparatus shown in FIG. 11;

Fig. 13 is a schematic view illustrating a structure of a dust collecting device according to another embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application. Embodiments of the present application and features of the embodiments may be combined with each other without conflict.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "upper," "lower," "left," "right," "vertical," "horizontal," "top," "bottom," "axial," "radial," "circumferential," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present application. In addition, "inner and outer" refer to inner and outer with respect to the outline of each component itself.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.

The application provides a dust collecting device, as shown in figure 1, which comprises a fan 1, a dust collecting air duct 2 connected with the fan 1 and a filtering component 3 positioned in the dust collecting air duct 2, wherein the fan 1 is connected with one end of the dust collecting air duct 2 and is used for driving airflow in the dust collecting air duct 2 to flow.

As shown in fig. 1, the dust collecting device provided by the present application can be used in cleaning equipment, such as cleaning robots, dust collectors, etc. When the dust collection device is applied, the fan 1 is connected with the cleaning mechanism 4 of the cleaning device through the dust collection air duct 2, the cleaning mechanism 4 can comprise a containing cavity and two rolling brushes positioned in the containing cavity, and the two rolling brushes can roll dust impurities and the like in the containing cavity through relative rotation so as to suck dust-containing gas containing the dust impurities and the like into the dust collection air duct to separate the dust impurities and the like.

The dust collection air duct 2 comprises a first air duct 21, a dust collection box 22 and a second air duct 23 which are communicated with each other, the first air duct 21 is arranged at an air inlet of the dust collection box 22, and the second air duct 23 is arranged between an air outlet of the dust collection box 22 and the fan 1.

Wherein, the center of the air inlet of the dust box 22 and the center of the air outlet are both located above the height center line of the dust box, the first air duct 21 is arranged to extend obliquely from bottom to top along the direction towards the air inlet, and the air flows along the first air duct 21, the top wall of the dust box 22 and the second air duct 23, so that a high-pressure separation area and a low-pressure dust collection area which are arranged up and down are formed in the dust box 22.

One end of the first air duct 21 far away from the dust collection box 4 is used for connecting the cleaning mechanism 4, and the first air duct 21 extends obliquely from bottom to top along the flowing direction of the dust-containing air flow entering the dust collection device, in a preferred embodiment of the application, the cross section of the first air duct 21 on the vertical surface is in a linear shape, so that the dust-containing air directly enters the dust collection box along the first air duct 21, the dust-containing air flow is prevented from colliding with the inner wall of the first air duct 21, and the kinetic energy loss of the dust-containing air flow is caused, so that dust impurities trapped in the dust-containing air flow cannot smoothly enter the dust collection box 22 for collection.

The "upper", "lower", "horizontal" and "vertical" orientations of each air duct or dust box in the dust collecting device described in the present application all refer to orientations of the dust collecting device in the application state, i.e. orientations or positions of the dust collecting device when the cleaning device 4 is connected to the cleaning device 4 and the cleaning device 4 works normally.

Of course, in other embodiments of the present application, the cross section of the first air duct 21 on the vertical surface may be in a smooth arc shape, or may be in other shapes, which only needs to ensure that the first air duct 21 has no large-angle bending, so as to avoid power loss caused by multiple collisions between the first air duct 21 and the inner wall of the air duct.

The second air duct 23 is disposed on the other side of the dust box 22 opposite to the first air duct 21, so that the air flow in the integrated air duct is collected and enters the second air duct 23, and is discharged after entering the fan 1 along the second air duct 23, and the cross-sectional area of the second air duct 23 is gradually reduced along the flow direction of the air flow so as to communicate the dust box 22 with the fan 1.

The dust box 22 includes a top wall and a bottom wall which are oppositely arranged, and side walls connected between the top wall and the bottom wall, the top wall, the bottom wall and the side walls are jointly enclosed to form a dust collection cavity, the dust box 22 further includes an air inlet and an air outlet which are formed on the two side walls which are oppositely arranged, dust-containing gas enters the dust collection cavity along the first air duct 21 through the air inlet, separation of dust impurities and the like in dust-containing airflow is realized in the dust collection cavity, the separated dust impurities and the like are collected through the dust collection cavity, and then the airflow separated from the dust impurities and the like enters the second air duct 22 through the air outlet and is discharged through the fan 1.

In the present application, the center of the air inlet and the center of the air outlet are both located above the center line L of the height of the dust collecting box 22, so that the dust-containing air flow enters the first air duct 21 from the bottom to the top from the cleaning mechanism 4 to enter the dust collecting cavity through the air inlet, and the dust and air are separated in the dust collecting cavity, and finally the air flow for separating dust and impurities enters the second air duct 23 through the air outlet to complete dust collecting separation.

In fact, since the air inlet and the air outlet of the dust box 22 are both located above the height center line L of the dust box 22 in the present application, when the dust-containing air flow reaches the dust box 22 from the first air duct 21, the dust-containing air flow will flow along the top wall of the dust box 22 at a high speed, so that the air flow formed above the dust box 22 flows at a high speed (the dotted line marked with the arrow in fig. 1 is the flow path of the air flow in the integrated device), a high-pressure separation area Q1 with a high air pressure is formed at the upper part of the dust box 22, and further, since the flow speed of the air flow at the bottom of the dust box 22 is low, a low-pressure dust collection area Q2 is formed at the bottom of the dust box 22; that is, the dust box 22 of the present application is affected by the flow velocity of the dust-laden air flow therein, so that the high pressure separation zone Q1 and the low pressure dust collection zone Q2 are formed in the dust collection chamber to be arranged up and down, and the pressure drop between the high pressure separation zone Q1 and the low pressure dust collection zone Q2 can reach 4KPa in the present application.

In a preferred embodiment of the present application, the air outlet is disposed at an obtuse angle θ greater than 90 ° between the sidewall and the bottom wall, so as to prevent the dust-containing air flow from directly acting on the sidewall, and then reflect to affect the high-speed flow of the dust-containing air flow, and simultaneously reduce the turbulence of the air flow in the low-pressure dust collecting area Q2, so as to prevent the dust and impurities accumulated in the low-pressure dust collecting area Q2 from flowing along with the air flow again. Preferably, the obtuse angle θ is between 90 ° and 150 °.

It should be noted that, the dust box 22 of the present application may further be provided with an openable cover plate, so that a user can conveniently finish pouring the dust and impurities collected in the dust box through opening the cover plate.

In a further aspect of the present application, the air outlet area is greater than the air inlet area, and the cross-sectional area of the second air duct 23 is at least partially greater than the cross-sectional area of the first air duct 21. By the arrangement, the wind pressure in the first air duct 21 is high, the suction force is high, and dust and impurities on the ground can be effectively sucked into the dust collecting air duct from the cleaning mechanism 4; the cross section of the second air duct 23 is set to be relatively larger, so that the wind pressure of the wind in the second air duct 23 is relatively reduced, dust and impurities are separated from the dust-containing air flow in the dust collecting box 22 under the action of gravity, and the dust intercepted by the collecting and filtering component 3 in the low-pressure dust collecting area Q2 gradually falls to the bottom, and the possibility of sucking the fine dust on the filtering component 3 into the fan 1 is reduced.

In a preferred embodiment of the present application, the center of the air inlet is located above 60% of the height H of the dust box and/or the center of the air outlet is located above 50% of the height H of the dust box; so as to further improve the flow efficiency of the dust-containing air flow in the dust collection air duct.

Further, in another preferred embodiment of the present application, the centroid C2 of the first air duct 21 and/or the centroid C1 of the second air duct 23 are located above the height center line L of the dust box 22; further, the dust collection air duct is in streamline arrangement, high-speed flow of dust-containing air flow or air flow after dust and impurities are separated in the dust collection air duct is guaranteed, and pneumatic efficiency and dust collection effect of the dust collection air duct are improved.

The dust collecting device further comprises a filter part 3, the filter part 3 is arranged at an air outlet of the dust collecting box 22, and specifically, the filter part 3 is detachably connected to the air outlet, so that when dust-containing air flow or air flow after dust-air separation is realized, the dust-containing air flow can be further filtered when the air flow flows through the filter part 3 and enters the fan 1, so that dust and impurities are left in the dust collecting box, and meanwhile, the dust or impurities entrained by the air flow can be effectively prevented from entering the fan 1, and the normal operation of the fan 1 is influenced. In a preferred embodiment of the present application, the filter element 3 is a HEPA filter (HIGH EFFICIENCY parts of air filter) AIR FILTER, however, in other embodiments of the present application, the filter element 3 may be any other filter as long as the filtering effect of the filter element 3 is ensured.

In the drawings, the dust collecting duct is only the first duct 21, the dust collecting box 22 and the second duct 23, and the structures are detachably connected, so that the dust collecting box 22 can be detached to finish dumping of dust and impurities collected in the dust collecting box 22 or a cover plate arranged on the dust collecting box 22. It will be appreciated that the above embodiments are merely exemplary, and that in other embodiments of the present application, the dust collection portion may be integrally formed, and that the dust and foreign matter collected inside the dust collection portion may be poured through the cover plate of the dust collection case 22.

Referring to fig. 2-5, a fan 1 is used to provide power for a dust collection air duct to drive a dust-containing air flow to flow. The fan 1 comprises a volute 11, a centrifugal fan 12 accommodated in the volute 11 and a motor 13 for driving the centrifugal fan 12 to rotate, the fan 1 is obliquely arranged, and an included angle K between the axial extension direction of the fan 1 and a horizontal plane is 0-45 degrees. That is, the blower 3 sucks in the dust-containing air flow with dust impurities filtered out from obliquely above, so that the air flow in the second air duct 23 enters the blower 1 from top to bottom, and low-noise air outlet is realized.

Preferably, the centroid C3 of the volute 11 is located above the height center line L of the dust collecting box 22, so that the dust collecting device is integrally streamline, and the dust collecting efficiency of the dust collecting device is further improved.

The volute 11 comprises a top cover 111 and a bottom cover 112 which are fastened to each other, an air supply port 113 formed on the top cover 111, and an air outlet 114 formed on the peripheral edge of the volute 11, and in a preferred embodiment of the present application, the bottom cover 112 is parallel to the plane of the end portion of the second air duct 23 where extends, and forms an included angle with the vertical plane.

In the present application, the volute 11 further includes a volute air channel formed between the top cover 111 and the bottom cover 112, that is, from the volute tongue 115 of the volute 11 (as shown in fig. 6, the inside of the top cover 111 of the volute 11), the radius of the volute 11 gradually increases with the increase of the envelope angle, so that the gap between the volute 11 and the centrifugal fan 12 gradually increases, and gradually forms an involute air channel.

Further, the function curve of the spiral contour line of the spiral case air channel in the spiral case 11 is:

Wherein g is a gap between a volute tongue of the volute 11 and the centrifugal fan 12, R1 is a radius of the centrifugal fan 12, e is a natural constant, B is a height of an inner cavity of the volute 11, B is a chord length of a blade of the centrifugal fan 12, and ω is an envelope angle of the volute 11.

Namely, the fan 1 introduces the gap g into the design of the spiral case air channel, so that the exhaust air at the exhaust outlet is prevented from colliding with the spiral case tongue under the action of centrifugal force, and noise is generated; meanwhile, by controlling the width of the gap g, noise generated by collision with the volute tongue 115 when the air flow flows back from the gap between the volute tongue 115 and the centrifugal fan 12 can be further reduced. Preferably, the envelope angle omega of the volute 11 is smaller than 270 degrees, and the width of the air outlet 114 can be effectively enlarged by the arrangement, so that the area of the air outlet 114 is enlarged, the air pressure of the air exhausted by the fan 1 is reduced, and the purpose of reducing the running noise of the fan 1 is achieved. In one embodiment, the radius R1 of the centrifugal fan 12 may be 25 to 36mm, the gap g between the volute tongue 115 and the centrifugal fan 12 is 3 to 7mm, preferably 4.5 to 5mm, the blade chord length B of the centrifugal fan 12 is 40 to 50mm, the envelope angle of the volute 11 is ω=0 to 270, and the inner cavity height B of the volute 11 is 25 to 35mm.

In a preferred embodiment of the present application, the area ratio of the air outlet 114 of the fan 1 to the air inlet 113 of the fan 1 is 1.8-2.8, and the air inlet 113 is small-sized to further improve the suction force of the fan 1 and then the dust collection efficiency of the dust collection air duct; it is further noted that the area of the air outlet 114 is the area of the vertical section from the top position of the volute tongue 115 to the inner wall of the volute 11 on the opposite side.

In another preferred embodiment of the present application, the width D of the air outlet 114 of the fan 1 is 0.8-1.3 times the diameter of the centrifugal fan 12. The width D of the air outlet 114 described in the present application is a vertical distance from the top position of the volute tongue 115 to the inner wall of the opposite side.

Of course, it will be appreciated that the fan 1 in the dust collecting device may be any fan capable of sucking the air flow in the dust collecting duct, and the type is not limited herein.

In one embodiment, the structure of the fan 1 may be shown with reference to fig. 2-5, where the fan 1 includes a volute 11 and a centrifugal fan 12 located in the volute 11, and an axial air inlet 113 and a lateral air outlet 114 are disposed on the volute 11.

Referring to fig. 7 and 8, the centrifugal fan 12 is accommodated between the top cover 111 and the bottom cover 112, and a scroll duct in the scroll 11 is disposed around the outer peripheral edge of the centrifugal fan 12; further, the centrifugal fan 12 includes a base 121, an annular wall 122 provided corresponding to the base 121, and blades 123 formed between the base 121 and the annular wall 122.

The annular wall 122 is provided with an inlet 1221 corresponding to the air supply port 112, the centrifugal fan 12 can rotate under the drive of the motor 13, the fan blades 123 in the centrifugal fan 12 force the air to rotate, work on the air to increase the momentum of the air, so that the air is thrown out from the periphery of the fan blades 123 under the action of centrifugal force, enters the volute 11 to convert kinetic energy into pressure energy, after the air in the centrifugal fan 12 is discharged, the pressure in the centrifugal fan 12 is lower than the pressure in the dust collection air duct, the air in the dust collection air duct is sucked into the fan blades 123 under the action of pressure difference, and the air is continuously discharged from the centrifugal fan 12 to drive the air flow in the dust collection air duct to flow, so that dust collection of the dust collection device is realized.

In the present application, the blades 123 of the centrifugal fan 12 extend from the outer peripheral edge of the inlet 1221 on the annular wall 122 in a curve, and connect the annular wall 122 and the base 121, and in the present application, 5 to 11 blades 123 are provided.

Optionally, the exit angle α of the fan blades 123 is 30-45 °, preferably 36 °; the center angle β corresponding to the chord length of the fan blade 123 is 60 to 100 °, preferably 90 °.

Further, the height h of the centrifugal fan 12 at the air outlet position, i.e., the distance between the annular wall 122 and the extended peripheral edge of the base 121, is 5-10 mm.

In a preferred embodiment of the present application, as shown in fig. 6, a flange 117 for noise reduction may be further provided on the inner wall of the scroll casing 11 near the scroll tongue 115, and the flange 117 may be arranged in an array. In this way, the problem of noise generated by the backflow of the current air flow at the volute tongue 115 is effectively solved by the design of the outline of the volute 11 and the design of the noise reduction flange at the volute tongue on the outline.

As shown in fig. 2 to 5, in one embodiment, the fan 1 further includes a motor 13 and a circuit board 14 for controlling the motor 13, a main body portion of the motor 13 and the circuit board 14 are fixed to an outer side of the scroll casing 11, wherein the main body portion of the motor 13 may be mounted on the scroll casing 11 in a multi-point supporting manner by a motor mount 132, and the circuit board 14 is disposed between the main body portion of the motor 13 and the scroll casing 11. The rotary shaft 131 of the motor 13 extends into the scroll casing 11 and is connected to the centrifugal fan 12.

The motor 13 may be a brushless external rotor motor, controlled by FOC (Field-Oriented Control), and the rotor may be made of rare earth or ferrite material. Preferably, the maximum rotational speed range of the motor 13 is between 20K rpm and 40 Krpm.

Further, the main body portion of the motor 13 and the circuit board 14 are mounted on the outside of the bottom cover 112 of the scroll case 11, and the rotation shaft 131 of the motor 13 is extended from the bottom cover 112 to the inside of the chamber of the scroll case to be connected to the rotation shaft connection portion 123 of the centrifugal fan 12 (refer to fig. 6 and 9).

Optionally, the volute 11 is provided with a heat dissipation through hole leading to one side where the motor 13 is located, so as to be used for dissipating heat of the motor 13 and the circuit board 14 on the outer side. The heat dissipation through holes may take various forms, for example, may include a plurality of heat dissipation holes 116 arranged on the scroll case 11 at intervals in the circumferential direction, and may further include a heat dissipation window 119 extending in a circular arc shape.

As shown in fig. 8 in particular, a heat dissipation through hole may be provided on the bottom cover 112 on which the scroll case 11 is mounted, the heat dissipation through hole including a plurality of heat dissipation holes 116 and a circular arc-shaped heat dissipation window 119, the heat dissipation holes 116 and the heat dissipation window 119 being located radially outside the centrifugal fan 12 (the diameter of the centrifugal fan 12 is approximately within the diameter range of the circular boss shown in fig. 4 and 7), and the plurality of heat dissipation holes 116 being circumferentially spaced around the centrifugal fan 12, the heat dissipation window 110 extending circumferentially circular arc-shaped around the centrifugal fan 12. In this way, the air flow blown out by the centrifugal fan 12 can flow out to the outside through the heat radiation holes 116 and the heat radiation windows 119 during the flow of the air in the scroll casing 11, and the air-cooled heat radiation is performed to the motor 13 and the circuit board 14.

The heat dissipation window 119 is disposed radially outside the centrifugal fan 12 and radially within a radius range where the volute tongue 115 is located, and may have a radial width of 5-7 mm, one end of the heat dissipation window 119 is located at a side 10-20 mm away from the air outlet 114 of the volute 11 of the volute tongue 115, the other end extends into a ventilation duct of the air outlet 114 of the volute 11, and a circular arc length of the heat dissipation window 119 may be set to 35-55 mm. In this embodiment, the heat dissipation window 119 with a larger area is disposed at the volute tongue 115 and extends to the air outlet 114, compared with other positions of the volute 11, the spiral flow of the airflow in the volute is not affected, and part of the airflow flowing back from the volute tongue 115 can flow out of the heat dissipation window 119, so that noise generated by the backflow of the airflow at the volute tongue 115 is reduced.

In one embodiment, the fan 1 may further include a bearing 15 between the main body of the motor 13 and the centrifugal fan 12, and as shown in fig. 5, an inner ring of the bearing 15 is fixed to a rotating shaft 131 of the motor 13, and an outer ring is fixed to the scroll 11 (specifically, to a bottom cover 112 of the scroll 11). The main part of motor is outside on the spiral case through the motor cabinet support, still installs through bearing 15 between pivot 131 and the spiral case 11, and the main part of motor 13 and centrifugal fan 12 set up in the both sides of bearing 15 respectively moreover, and the fan counter weight is even, can guarantee the stability of motor 13, prevents to take place the shake in the operation process.

According to another aspect of the present application, there is also provided a cleaning apparatus 200 including the dust collecting device as described above, wherein the cleaning apparatus 200 performs recovery and collection of dirt on the floor by the dust collecting device, and further, the cleaning apparatus 200 of the present application further includes: the present application is not described in detail in the specification of the present application because the above structures are all mature structures in the prior art, and are used for accommodating the housing of the dust collecting device, the driving unit accommodated in the housing for controlling the operation of the dust collecting device, and the moving unit in driving connection with the driving unit for driving the cleaning device 200 to move on the working plane.

In the embodiment shown in fig. 11 and 12, the cleaning apparatus 200 is a cleaning robot, and the dust collecting device is mounted in a housing of the cleaning robot. In other embodiments, the cleaning apparatus 200 may also be a hand-held cleaner (as shown in fig. 13), further, when the cleaning apparatus 200 is a hand-held cleaner, the blower 1, the dust collection air duct 2 connected with the blower 1, and the filter component 3 located in the dust collection air duct 2 are all located in the cleaning head of the hand-held cleaner, so that the hand-held cleaner can conveniently and quickly separate the sucked dust/dirt, and the service life of the hand-held cleaner is effectively prolonged; it should be noted that, in the drawings of the present application, only the fan 1 is illustrated as being disposed in the cleaning head, in other embodiments of the present application, the fan 1 is further disposed in the handle module 5 or the connecting rod 6, that is, the disposition position of the fan 1 in the present application may be selected according to actual needs, and it should be further noted that, in other embodiments of the present application, the dust collecting device may be disposed in other cleaning apparatuses for performing negative pressure cleaning.

In summary, the arrangement structure of the dust collection air duct 2 in the dust collection device effectively reduces bending of the dust collection air duct 2, so that dust-containing gas entering the dust collection air duct 2 flows along the upper part of the dust collection air duct 2 at a high speed, wind power loss caused by collision of dust-containing gas flow in the dust collection air duct 2 is avoided, wind resistance of the dust-containing gas flow is reduced, pneumatic efficiency of the dust collection air duct 2 for driving the dust-containing gas to flow is improved, efficient dust collection of the dust collection device is achieved, and then a cleaning device using the integrated device has good dust collection effect.

Further, by setting the setting position of the dust collecting box 22 in the dust collecting device and the combination of the dust collecting box 22 with the first air duct 21 and the second air duct 23, a high-pressure separation area Q1 and a low-pressure dust collecting area Q2 which are arranged in an up-down partition manner are formed in the dust collecting box 22, so that dust impurities and the like wrapped in dust-containing gas fall into the low-pressure dust collecting area Q2 from the high-pressure separation area Q1 positioned at the upper part under the action of gravity, and separation of the dust impurities and the like in the dust-containing gas flow from the gas is realized.

Meanwhile, through the structure provided with the fan 1, the efficiency of the fan 1 can be effectively improved, the wind pressure of the fan 1 during operation is improved, the dust collection power of the dust collection air duct 2 connected to the fan 1 is further improved, the noise of the fan 1 during operation is further reduced, and the cleaning device using the dust collection device has good dust collection effect and lower operation noise.

The foregoing description of the preferred embodiments of the application is not intended to be limiting, but rather is to be construed as including any modifications, equivalents, and alternatives falling within the spirit and principles of the application.

Claims (14)

1. The dust collecting device is characterized by comprising a fan, a dust collecting air duct connected with the fan and a filtering component arranged in the dust collecting air duct, wherein the fan is connected to one end of the dust collecting air duct and is used for driving airflow in the dust collecting air duct to flow;

the dust collection air duct comprises a first air duct, a dust collection box and a second air duct which are communicated with each other, the first air duct is arranged at an air inlet of the dust collection box, and the second air duct is arranged between an air outlet of the dust collection box and the fan;

the center of the air inlet and the center of the air outlet are both positioned above the height center line of the dust collecting box, the first air duct is arranged to extend obliquely downwards and upwards along the direction facing the air inlet, and air flow can flow along the first air duct, the top wall of the dust collecting box and the second air duct, so that a high-pressure separation area and a low-pressure dust collecting area which are vertically distributed are formed in the dust collecting box.

2. The dust collection device of claim 1, wherein the centroid of the first air duct and/or the centroid of the second air duct are located above the dust box height centerline.

3. The dust collection device according to claim 2, wherein the center of the air inlet is located at more than 60% of the height of the dust collection box;

And/or the center of the air outlet is positioned at more than 50% of the height of the dust collection box.

4. The dust collecting device of claim 1, wherein the dust collecting box has oppositely disposed top and bottom walls and side walls for connecting the top and bottom walls, and the first and second air ducts are disposed on the oppositely disposed two side walls.

5. The dust collection device of claim 1, wherein the dust collection device comprises a filter element removably attached at the air outlet.

6. The dust collecting device according to claim 1, wherein the fan comprises a volute, a centrifugal fan accommodated in the volute, and a motor for driving the centrifugal fan to rotate, the fan is arranged in an inclined manner, and an included angle between an axial extension direction of the fan and a horizontal plane is between 0 and 45 degrees.

7. The dust collection device of claim 6, wherein a centroid of the volute is located above a height centerline of the dust collection box.

8. The dust collector of claim 6 wherein the volute spiral profile has a function curve of:

Wherein g is a gap between a volute tongue of the volute and the centrifugal fan, R1 is a radius of the centrifugal fan, e is a natural constant, B is a height of an inner cavity of the volute, B is a chord length of a fan blade of the centrifugal fan, and ω is an envelope angle of the volute.

9. A dust collecting device as claimed in claim 6, characterized in that the envelope angle ω of the volute is less than 270 °; the gap g between the volute tongue of the volute and the centrifugal fan is 3-7 mm.

10. The dust collecting device as claimed in claim 6, wherein the scroll case includes a supply port connected to the second air duct and an exhaust port formed at an outer circumferential edge of the scroll case, and an area of the exhaust port is 1.8 to 2.8 times an area of the supply port.

11. The dust collecting device as claimed in claim 6, wherein the width D of the air outlet is 0.8 to 1.3 times the diameter of the centrifugal fan.

12. The dust collecting device of claim 6, wherein the outlet angle α of the centrifugal fan blades is 30-45 °; and/or the central angle beta corresponding to the chord length of the fan blade of the centrifugal fan is 60-100 degrees.

13. The dust collecting device of claim 5, wherein the motor includes a motor body and a connection bearing for connecting the scroll casing, and a rotation shaft of the motor extends into the scroll casing through the bearing to connect the centrifugal fan.

14. A cleaning apparatus, characterized in that the cleaning apparatus comprises a dust collecting device according to any one of claims 1-13.