CN214631939U - Deflectors, Dust and Air Separation Mechanisms and Cleaning Equipment - Google Patents

Abstract

The utility model discloses a flow guide piece, a dust and gas separation mechanism and a cleaning device. The flow guide piece is applied to the dust and gas separation mechanism in the cleaning equipment. The circumferential direction of the recirculation part is arranged between the recirculation part and the dust collecting part. Each diversion cone blade has a diversion surface. A guide space is formed between two adjacent guide surfaces, and the intake side is communicated with the air inlet of the cleaning device through the guide space, and the fluid is guided by the tangential acceleration section to flow toward the intake side of the return portion. The above technical solution can solve the problem that the filter structure is easily blocked with the continuous increase of working time during the use of the current cleaning equipment such as vacuum cleaners, which leads to the decline of the dust-absorbing performance of the vacuum cleaner and the poor dust-absorbing effect.

Description

Flow guide piece, dust-gas separation mechanism and cleaning equipment

Technical Field

The utility model relates to a burnisher technical field especially relates to a water conservancy diversion spare, dirt gas separating mechanism and cleaning equipment.

Background

Cleaning equipment is an extremely important product in daily work and life of people, and with the progress of science and technology, more and more electric cleaning equipment enters the production and life of people, such as electric vacuum cleaners, automatic floor-sweeping machines, full-automatic floor-cleaning machines and the like. Taking a dust collector as an example, the dust collector generates suction by means of a motor, separates dust and impurities in air from the air by means of a filtering structural member such as a filter HEPA and the like, and continuously generates suction to achieve the purpose of dust collection. However, in the working process of the dust collector, along with the continuous increase of the working time, the amount of dust and sundries blocking the filtering structure can be gradually increased, the blocking effect on the filtering structure is obviously increased, and then the amount of air capable of passing through the filtering structure can be gradually reduced, so that the dust collection performance of cleaning equipment such as the dust collector is reduced, and the dust collection effect is poor.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a water conservancy diversion spare, dirt gas separating mechanism and cleaning equipment to solve cleaning equipment such as present dust catcher in the use, along with operating time's continuation increases, filtration is easy to be blockked up, leads to the dust absorption performance decline of dust catcher, the relatively poor problem of dust absorption effect.

In order to solve the above problem, the utility model adopts the following technical scheme:

in a first aspect, the embodiment of the utility model discloses a flow guide member, which is applied to a dust and gas separating mechanism in a cleaning device, the dust and gas separating mechanism comprises a backflow part and a dust collecting part, the backflow part is provided with a backflow port, the backflow part is provided with an air inlet side and an air outlet side, the air outlet side is configured to be communicated with an air outlet of the cleaning device, the air outlet side is communicated with the air inlet side through the backflow port, the dust collecting part is provided with a dust collecting cavity, the backflow part is arranged in the dust collecting cavity,

the flow guide piece comprises a plurality of flow guide conical blades, the flow guide conical blades are arranged between the backflow part and the dust collecting part along the circumferential direction of the backflow part, each flow guide conical blade is provided with a flow guide surface, the flow guide surfaces extend along the axial spiral direction of the flow guide piece, each flow guide surface comprises a tangential acceleration section, flow guide spaces are formed between any two adjacent flow guide surfaces, the air inlet side passes through the flow guide spaces and is communicated with the air inlet of the cleaning equipment, and fluid is guided to the air inlet side of the backflow part by the tangential acceleration sections to flow.

In a second aspect, the utility model discloses a dust-gas separating mechanism, which is applied in a cleaning device, the cleaning device comprises a suction part, the dust-gas separating mechanism comprises a reflux part, a shell, a dust collecting part and the flow guide piece, wherein the reflux part is provided with a reflux port, the return portion having an intake side and an exhaust side, the exhaust side communicating with the intake side through the return port, the housing has an air inlet, an accommodating chamber, and a suction port communicating with the suction portion, the dust collecting part is arranged in the accommodating cavity and is provided with a dust collecting cavity, the backflow part and the flow guide part are both arranged in the dust collecting cavity, and the flow guide piece is positioned between the backflow part and the dust collection part, the exhaust side is communicated with the exhaust port of the cleaning equipment, and the air inlet side is communicated with the air inlet through the flow guide space of the flow guide piece.

In a third aspect, the present invention discloses a cleaning device, comprising a suction part and the above dust-gas separating mechanism, wherein the suction part has a gas outlet, and the suction part is communicated with the gas outlet side of the return part.

The utility model discloses a technical scheme can reach following beneficial effect:

the embodiment of the utility model discloses guide member, this guide member can use on the dirt gas separating mechanism in cleaning equipment, and dirt gas separating mechanism includes backward flow portion and collection dirt portion, and the backward flow portion has the backward flow mouth, and the backward flow portion is equipped with air intake side and exhaust side, exhaust side and cleaning equipment's gas vent intercommunication, and the exhaust side is through backward flow mouth and air intake side intercommunication, and collection dirt portion has the dust collection chamber, and the backward flow portion sets up within the dust collection chamber. The water conservancy diversion spare sets up between backward flow portion and dust collection portion, a plurality of water conservancy diversion blades of water conservancy diversion spare set up along the circumference of backward flow portion, each water conservancy diversion blade all has the water conservancy diversion face, form the water conservancy diversion space between two adjacent water conservancy diversion faces, the air inlet side of backward flow portion is through the air inlet intercommunication of water conservancy diversion space and cleaning equipment, thereby at the in-process of cleaning equipment work, make gaseous air inlet that can self-cleaning equipment get into, get into the air inlet side of backward flow portion through the water conservancy diversion space, and flow out to the exhaust side of backward flow portion through the backward flow mouth. The side of the air inlet side of the backflow part is an air outlet end of the flow guide space, and the side of the air outlet side of the backflow part is an air inlet end of the flow guide space.

And the flow guide surface spirally extends along the axial direction of the backflow part, and comprises a tangential acceleration section which can increase the tangential speed of gas and sundries. When the gas and the sundries leave the flow guide surface, the gas carries the sundries to adhere to the side part of the dust collection cavity to flow, and the weight of the sundries is relatively large, so that the inertia of the sundries disappears rapidly under the action of gravity, friction force and other forces, and finally the sundries are collected into the dust collection cavity. Meanwhile, due to the fact that the sundries have certain speed and centrifugal force, even if the backflow port has certain suction force, the sundries cannot be sucked into the backflow portion from the backflow port basically, and the fact that the air flowing to the exhaust side of the backflow port does not contain sundries such as dust basically is guaranteed, even if the cleaning equipment is long in working time, the blocking degree of a filtering structure in the cleaning equipment is relatively low, the cleaning equipment is guaranteed to have high dust collection performance all the time, and the dust collection effect is good.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:

fig. 1 is an assembly schematic view of a flow guide member disclosed in an embodiment of the present invention;

FIG. 2 is a schematic view of the structure shown in FIG. 1 in another orientation;

FIG. 3 is a schematic view of the structure shown in FIG. 1 in a further orientation;

FIG. 4 is a cross-sectional schematic view of the structure shown in FIG. 1;

fig. 5 is a dimension comparison view of a cross section of a flow guide cone disclosed in an embodiment of the present invention;

FIG. 6 is an exploded schematic view of a cleaning device disclosed in an embodiment of the present invention;

fig. 7 is a schematic cross-sectional view of a cleaning device according to an embodiment of the present invention.

Description of reference numerals:

100-flow guide part, 110-reflux part, 111-reflux port, 120-flow guide cone blade, 121-axial acceleration section, 122-tangential acceleration section, 123-straight section,

200-shell, 210-air inlet, 220-containing cavity, 230-bottom wall, 240-side wall,

310-dust collecting part, 311-dust collecting chamber, 320-cover plate,

400-filter screen, 410-plugging part, 420-filter part, 430-flanging,

500-suction section.

Detailed Description

To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. 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.

The technical solutions disclosed in the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

As shown in fig. 1 to 7, the present application discloses a deflector 100, a dust-air separating mechanism, and a cleaning apparatus, and the deflector 100 may be applied to the dust-air separating mechanism, and the cleaning apparatus may include the dust-air separating mechanism.

Of course, the dust-gas separating mechanism may include other components besides the above-mentioned flow guide 100 to constitute the dust-gas separating mechanism. For example, the dust-gas separating mechanism may include the backflow part 110 and the dust collecting part 310. Accordingly, the cleaning apparatus may include the dust-air separating mechanism as described above, and the cleaning apparatus may generally further include a suction part 500, and the suction part 500 may specifically include a driving motor by which a suction force may be generated to flow air in and out of the cleaning apparatus. In addition, the cleaning device may further include a handle, etc., which is not described herein for brevity.

During the operation of the dust-gas separating mechanism, the gas entering the dust-gas separating mechanism can be discharged from the backflow portion 110 to the outside of the dust-gas separating mechanism, and finally discharged from the exhaust port of the self-cleaning device to the outside. Of course, the gas discharged to the outside is the gas after being filtered and cleaned. The return portion 110 has a return port 111, and the return portion 110 has an intake side and an exhaust side. During operation of the dust-gas separating mechanism, gas (which may include some fine dust, etc.) may flow from the inlet side of the return portion 110 to the outlet side through the return port 111. When the dust-air separating mechanism is applied to the cleaning apparatus, the exhaust side communicates with the exhaust port of the cleaning apparatus. More specifically, the exhaust side communicates with a suction part 500 of the cleaning apparatus, the suction part 500 has an exhaust port, and the suction part 500 may provide a suction force to suck the gas to be cleaned into the cleaning apparatus and to exhaust the gas after cleaning out of the cleaning apparatus.

The dust collecting part 310 is a component of the dust-air separating mechanism for collecting dust and other impurities, and the dust collecting part 310 has a dust collecting cavity 311, and the dust and other impurities can be collected in the dust collecting cavity 311. Of course, other structures capable of collecting impurities, such as the housing 200 mentioned below, may be provided in the dust-air separating mechanism. In this case, the dust collecting part 310 may be detachably installed, so that the dust collecting chamber 311 may be opened to discharge the dust collected in the dust collecting chamber 311 after the amount of the dust collected in the dust collecting chamber 311 reaches a certain limit or after the cleaning operation is completed. In the dust-air separating mechanism, the backflow part 110 is disposed in the dust collecting cavity 311, so that at least a part of impurities, such as impurities with larger particles or heavier weight, in the air entering the backflow part 110 can be retained in the dust collecting cavity 311 without entering the backflow part 110 along with the air flow. Of course, a filtering structure may be further disposed in the dust-gas separating apparatus to further reduce the amount of impurities entrained in the airflow entering the backflow portion 110, which will be described in detail below.

The guide 100 includes a plurality of guide vanes 120, and the plurality of guide vanes 120 are disposed between the backflow part 110 and the dust collecting part 310 in a circumferential direction of the backflow part 110. Alternatively, the material of the guiding cone 120, the material of the backflow part 110 and the material of the dust collecting part 310 are the same, for example, the three parts may be formed by plastic or metal. Of course, in other embodiments of the present application, the materials of the three aforementioned components may be different or different from each other.

In the application of the flow guide member 100, each flow guide cone 120 may be fixedly connected to the surface of the backflow part 110 facing the dust collecting part 310, that is, the flow guide cone 120 is fixed on the outer surface of the backflow part 110. Alternatively, the guide cone 120 and the backflow portion 110 may be integrally formed by injection molding or the like. Of course, the diversion cone 120 and the return portion 110 may be formed separately, and the diversion cone 120 may be fixed to the return portion 110 by thermal welding or adhesion. Alternatively, each of the guide vanes 120 may be fixed to a surface of the dust collection part 310 facing the return part 110, that is, the guide vanes 120 are fixed to an inner surface of the dust collection part 310. Of course, the above-mentioned diversion member 100 can also be applied to other positions in the cleaning device to improve the separation effect of the gas and the impurities by using the diversion member 100 with the above-mentioned structure.

More specifically, the shapes and sizes of the guide cone blades 120 can be made to be correspondingly the same, so that the processing difficulty of the whole guide member 100 is reduced on one hand, and the action effects of the guide cone blades 120 on the gas are the same or basically the same on the other hand, so that the flow rate and the flow direction of the gas entering from different positions on the guide member 100 are basically the same, the condition that the gas flow is disturbed in a dust-gas separation mechanism due to the difference of the flow direction or the flow speed between the gas entering from different guide cone blades 120 is prevented, and the comprehensive performance of the guide member 100 is improved.

A flow guiding space is formed between any two adjacent flow guiding surfaces, that is, the spaces on two axially opposite sides of the flow guiding part 100 along the backflow portion 110 may be communicated through the space between any two adjacent flow guiding conical blades 120. And, the air inlet side of the backflow part 110 can communicate with the air inlet 210 of the cleaning device through the flow guiding space, thereby ensuring that the gas outside the flow guiding member 100 (or the dust collecting part 310) can enter the air inlet side of the backflow part 110 through the flow guiding space from the air inlet 210 of the cleaning device, then flow to the air outlet side of the backflow part 110 through the backflow port 111 of the backflow part 110, and finally be discharged from the air outlet of the cleaning device. Specifically, the air inlet 210 of the cleaning device may be disposed on the housing 200 of the dust-air separating mechanism, and the air outlet of the cleaning device may be disposed according to actual conditions, and it is ensured that the suction portion 500 of the cleaning device communicates with the air outlet, and of course, the air outlet of the cleaning device may also be directly disposed on the suction portion 500.

Each guide cone 120 has a guide surface extending spirally in the axial direction of the guide member 100. The axial direction of the flow guide member 100 may be considered as a direction perpendicular to the distribution direction of the plurality of flow guide cone blades 120, and the axial direction of the flow guide member 100 and the axial direction of the backflow portion 110 are parallel to each other during the operation of the flow guide member 100. The flow guide surface can provide a flow guide effect for the gas, and the spirally extending flow guide surface can change the flow direction of the gas.

The flow guiding surface comprises an axial acceleration section 121 and a tangential acceleration section 122, the axial acceleration section 121 being connected to the tangential acceleration section 122 on the side facing away from the inlet side. That is to say, in the process that the gas passes through the diversion surface and reaches the air inlet side of the backflow portion 110 from the outside of the dust-gas separation mechanism, the gas passes through the axial acceleration section 121, then passes through the tangential acceleration section 122, and then reaches the position of the air inlet side of the backflow portion 110.

As described above, the dust and gas separating mechanism may be in communication with the suction portion 500 in the cleaning apparatus to allow gas to flow in and out of the cleaning apparatus during operation of the cleaning apparatus. The axial velocity and the tangential velocity of the gas flowing through are increased by the axial acceleration section 121 and the tangential acceleration section 122, so that the gas can flow against the side of the dust collecting part 310 after leaving the flow guide surface. In this case, the impurities such as dust are gradually separated from the airflow by the action of the gravity of the impurities, and finally fall into the dust collection chamber 311 after the inertia disappears, thereby reducing the probability that the impurities flow into the return opening 111 together with the airflow. In addition, most of the impurities will be accumulated on the edge of the dust collecting part 310 first under the action of the flow guide surface. As described above, the gas leaving the flow guide surface first flows along the side portion of the dust collection chamber 311, and therefore, as the gas continuously enters from the flow guide space to the air inlet side of the backflow portion 110, the gas gradually entering the backflow port 111 is the gas in the space around the backflow portion 110, and a certain distance is provided between the gas and the impurities accumulated on the edge of the dust collection portion 310, so that the probability that the impurities in the dust collection chamber 311 enter the backflow port 111 along with the airflow can be further reduced.

The embodiment of the utility model discloses guide member 100, this guide member 100 can use on the dirt gas separating mechanism in cleaning equipment, dirt gas separating mechanism includes backward flow portion 110 and collection dirt portion 310, backward flow portion 110 has backward flow mouth 111, backward flow portion 110 is equipped with air intake side and exhaust side, exhaust side and cleaning equipment's gas vent intercommunication, and the exhaust side is through backward flow mouth 111 and air intake side intercommunication, collection dirt portion 310 has the dust collection chamber, backward flow portion 110 sets up within the dust collection chamber. The flow guide member 100 is disposed between the backflow portion 110 and the dust collecting portion 310, the plurality of flow guide tapered blades 120 of the flow guide member 100 are disposed along the circumferential direction of the backflow portion 110, each flow guide tapered blade 120 has a flow guide surface, a flow guide space is formed between two adjacent flow guide surfaces, and an air inlet side of the backflow portion 110 is communicated with an air inlet of the cleaning device through the flow guide space, so that in the working process of the cleaning device, air can enter from the air inlet of the cleaning device, enter the air inlet side of the backflow portion 110 through the flow guide space, and flow out to an air outlet side of the backflow portion 110 through the backflow port 111. The side of the air inlet side of the backflow part 110 is an air outlet end of the guide space, and the side of the air outlet side of the backflow part 110 is an air inlet end of the guide space.

The flow guide surface extends spirally along the axial direction of the backflow portion 110, the flow guide surface includes an axial acceleration section 121 and a tangential acceleration section 122, the axial acceleration section 121 is connected to the side of the tangential acceleration section 122 away from the air inlet side, the axial acceleration section 121 can enable the axial velocity of the gas and the impurities flowing along the flow guide surface to be increased rapidly, and the tangential acceleration section 122 can increase the tangential velocity of the gas and the impurities. When the gas and the sundries leave the flow guide surface, the gas carries the sundries to adhere to the side part of the dust collection cavity to flow, and the weight of the sundries is relatively large, so that the inertia of the sundries disappears rapidly under the action of gravity, friction force and other forces, and finally the sundries are collected into the dust collection cavity. Meanwhile, due to the fact that the sundries have certain speed and centrifugal force, even if a certain suction force is formed at the position of the return opening 111, the sundries cannot be sucked into the return portion 110 from the return opening 111 basically, and the air flowing to the exhaust side of the return opening 111 does not contain sundries such as dust basically, so that even if the cleaning equipment is long in working time, the blocking degree of a filter structure in the cleaning equipment is relatively low, the cleaning equipment is guaranteed to have high dust collection performance all the time, and the dust collection effect is good.

Alternatively, both the axial acceleration section 121 and the tangential acceleration section 122 may be planar structures, and the axial acceleration section 121 and the tangential acceleration section 122 are connected to each other to form the guide cone 120. In another embodiment of the present application, the axial acceleration section 121 and the tangential acceleration section 122 are both arc-shaped surfaces, and the transition between the axial acceleration section 121 and the tangential acceleration section 122 is smooth, in which case the velocity loss of the gas after flowing through the flow guiding surface can be further reduced.

As described above, the surfaces of the axial acceleration section 121 and the tangential acceleration section 122 may be planar structures, in this case, the inclination degree of the axial acceleration section 121 with respect to the axial direction of the flow guide member 100 (or the backflow portion 110) is smaller than the inclination degree of the tangential acceleration section 122 with respect to the axial direction of the flow guide member 100, so that the axial acceleration effect of the gas when the gas passes through the axial acceleration section 121 is significant, and the acceleration effect in the direction perpendicular to the axial direction of the backflow portion 110 when the gas passes through the tangential acceleration section 122 is significant, so that the gas can flow against the side portion of the dust collecting portion 310 as much as possible when the gas leaves the flow guide surface.

In the case where the surfaces of the axial acceleration section 121 and the tangential acceleration section 122 are both arc-shaped structures, since the inclination degree at any position on the axial acceleration section 121 (and the tangential acceleration section 122) is different, the inclination degree of the whole flow guiding surface can be gradually changed along the flow direction of the gas. That is, the degree of inclination at any of a plurality of points on the flow guide surface along the gas flow direction is related to the position. For example, in the axial direction of the backflow portion 110, the degree of inclination is larger at a point closer to the tangential acceleration section 122 in the axial acceleration section 121; similarly, in the axial direction of the backflow portion 110, the degree of inclination is smaller at a point closer to the axial acceleration section 121 in the tangential acceleration section 122. Alternatively, the tangential direction of the point on the tangential acceleration segment 122 that is the farthest distance from the axial acceleration segment 121 is perpendicular to the axial direction of the return portion 110. Under the condition of adopting above-mentioned technical scheme, can guarantee that gas has higher flow smoothness nature, and can guarantee that gas can carry out axial acceleration at axial acceleration section 121, carries out tangential acceleration at tangential acceleration section 122.

In other words, as shown in fig. 5, an included angle between any position on the axial acceleration section 121 and the axial direction of the backflow portion 110 is α, and an included angle between any position on the tangential acceleration section 122 and the axial direction of the backflow portion 110 is β, and by making α < β, it can be ensured that the axial acceleration section 121 can increase the speed of the gas along the axial direction of the backflow portion 110, and the tangential acceleration section 122 can increase the speed of the gas along the direction perpendicular to the axial direction of the backflow portion 110, and further, impurities such as dust in the gas are more easily collected to the bottom portion 311 due to the increase of the axial acceleration, and the gas is more easily recovered by the backflow portion 110 due to the increase of the tangential acceleration, so that the fluid loss is reduced, and at the same time, the dust in the gas can be more easily separated due to the increase of the tangential acceleration.

The specific value ranges of the alpha and the beta can be determined according to actual conditions, and the alpha and the beta can be fixed values or range values, and only alpha is required to be less than beta. Specifically, as shown in FIG. 5, it is possible to have 0 < α ≦ 30, and 15 ° < β < 90 °, in which case the initial velocity of the gas as it leaves the flow guide surface is still relatively large.

Specifically, the respective sizes of the axial acceleration section 121 and the tangential acceleration section 122 can be determined according to the actual size of the dust-gas separation mechanism and the like. Alternatively, as shown in fig. 5, the axial acceleration section 121 has a dimension L1 in the axial direction of the backflow portion 110, and the tangential acceleration section 122 has a dimension L2 in the axial direction of the backflow portion 110, so that the acceleration effect of the gas on the axial acceleration section 121 can be better by making L1 > L2. Specifically, a specific size range of L1 may be 10mm to 15mm, a specific size range of L2 may be 5mm to 10mm, more specifically, L1 may be 13.8mm, L2 may be 7.4mm, and simply, L2 may be about half of L1.

Accordingly, as shown in fig. 5, the dimension of the axial acceleration section 121 in the direction perpendicular to the axial direction of the backflow portion 110 is L3, the dimension of the tangential acceleration section 122 in the direction perpendicular to the axial direction of the backflow portion 110 is L4, and by making L3 < L4, the acceleration effect of the gas on the tangential acceleration section 122 can also be relatively good. Specifically, a specific size range of L3 may be 6mm to 9.5mm, a specific size range of L4 may be 8.5mm to 12mm, more specifically, L3 may be 7.91mm, L4 may be 10.36mm, and simply, L4 may be about 1.4 times as large as L3.

Further, the flow guiding surface may further include a straight section 123, the straight section 123 is perpendicular to the axial direction of the flow guiding member 100, and the straight section 123 is connected to an end of the tangential acceleration section 122 facing away from the axial acceleration section 121. That is, gas flowing through the axial acceleration section 121 to the tangential acceleration section 122 will eventually exit the flow guide surface from the straight section 123. Under the action of the straight section 123, the flowing direction of the gas can further approach to the direction perpendicular to the axial direction of the backflow part 110, so that the gas is more difficult to move towards the direction close to the bottom of the dust collection cavity 311 when leaving the flow guide surface, the gas flow is prevented from blowing away dust and other impurities at the bottom of the dust collection cavity 311, and the amount of dust and other impurities carried in the gas flowing into the backflow part 110 from the backflow port 111 is further reduced. Specifically, the size of the straight section 123 in the direction perpendicular to the axial direction of the backflow portion 110 may be L5, the size of L5 may range from 3mm to 4.5mm, and more specifically, L5 may be 3.5 mm.

Optionally, the axial acceleration section 121, the tangential acceleration section 122 and the straight section 123 of the guide cone 120 are formed in an integral manner, and any two adjacent sections are in smooth transition. Moreover, a connection structure may also be disposed on a side of the diversion cone 120 away from the backflow portion 110, and the connection structure may be an annular structure. One end of each diversion cone 120 departing from the backflow portion 110 can be connected with the connecting structure, so that the diversion cones 120 are embedded between the backflow portion 110 and the connecting structure, gas flowing into the diversion space from the gas inlet 210 is further prevented from leaking from one side of the diversion space departing from the backflow portion 110, and the gas in the diversion space can flow to the gas inlet side of the backflow portion 110. In addition, in the installation process, the connecting structure can be clamped in the dust collecting cavity 311, and the connecting structure is attached to the side part of the dust collecting cavity 311, so that gas is prevented from entering the air inlet side of the backflow part 110 from the gap between the guide member 100 and the dust collecting cavity 311.

Optionally, the sum of the sectional areas of the plurality of guide spaces is equal to the sectional area of the backflow port 111, wherein the sectional area of the guide space is the area of the smallest section of the space between any two adjacent guide cone blades 120. In the above case, the amount of gas entering the intake side of the backflow portion 110 from the intake port 210 per unit time may be made equal to the amount of gas flowing from the intake side to the exhaust side through the backflow port 111 and finally exhausted from the exhaust port to the outside of the cleaning apparatus. By adopting the technical scheme, the situation that the cross section area of the return opening 111 is smaller than the sum of the cross section areas of the guide spaces, so that a strong suction effect is generated at the return opening 111 can be prevented, and impurities in the dust collection cavity 311 are further prevented from entering the return opening 111; meanwhile, the situation that impurities are not easily separated from the gas and are easily sucked into the backflow port 111 due to the fact that the centrifugal force of the gas flow leaving the flow guide surface is small because the suction force is insufficient due to the fact that the sectional area of the backflow port 111 is larger than the sum of the sectional areas of the plurality of flow guide spaces can be prevented.

Specifically, the number of the guide cone blades 120 may be selected according to the actual situation such as the size and shape of the guide cone blades, for example, the number of the guide cone blades 120 may be 3, 4 or more. In the case where the guide cone 120 has the same shape and size, the plurality of guide cones 120 may be uniformly distributed, and the number of the guide cones 120 may be 7. Under the condition that the total air inflow is fixed, the air inflow of a single flow guide space can be reduced by adopting the technical scheme, and the number of structures for providing a guide effect for gas is increased, so that the spiral effect of the gas is better, the air inflow of the single flow guide space can not be greatly reduced, the air inflow of the single flow guide space is prevented from being too small, and impurities with larger particles can be prevented from blocking the flow guide space.

As described above, the present application also discloses a dust and air separating mechanism, which may be applied in a cleaning apparatus including the suction part 500. The dust-air separating mechanism includes a return portion 110, a housing 200, a dust collecting portion 310, and any one of the above-mentioned deflectors 100, wherein the return portion 110 has an air inlet side and an air outlet side, and the air outlet side is communicated with the air inlet side through a return port 111. The housing 200 has an air inlet 210, a receiving chamber 220, and a suction port communicating with the suction part 500 so that the gas at the exhaust side of the backflow part 110 can be discharged to the exhaust port of the cleaning apparatus through the suction port. Of course, the suction portion 500 may be directly connected to the exhaust side of the return portion 110, and the suction port of the housing 200 may be sealed and fitted to the suction portion 500. The dust collecting part 310 is installed in the accommodating cavity 220, the dust collecting part 310 has a dust collecting cavity 311, the backflow part 110 and the flow guide member 100 are both installed in the dust collecting cavity 311, the flow guide member 100 is located between the backflow part 110 and the dust collecting part 310, the exhaust side is communicated with the exhaust port of the cleaning device, and the air inlet side of the backflow part 110 is communicated with the air inlet 210 of the housing 200 through the flow guide space of the flow guide member 100.

During the operation of the dust-gas separating mechanism, the suction part 500 operates to provide a suction force, the gas carrying impurities enters the housing 200 from the gas inlet 210 of the housing 200, then enters the gas inlet side of the backflow part 110 through the flow guiding space of the flow guiding member 100, then at least part of the impurities carried in the gas are separated from the gas, the impurities fall into the dust collecting cavity 311, the gas flows along the side of the dust collecting cavity 311, finally enters the backflow part 110 from the backflow port 111, flows to the gas outlet side of the backflow part 110, and finally is discharged out of the cleaning device through the gas outlet of the self-cleaning device of the suction part 500. Of course, other structures, such as the filtering structure described above, and the filtering hypaeta, etc., may be provided in the dust-gas separating mechanism, which will be described in detail below.

Optionally, in the axial direction of the flow guide 100, or in the axial direction of the backflow portion 110, the backflow portion 110 extends toward one end of the suction portion 500 and beyond the flow guide cone 120. Under the condition of adopting above-mentioned technical scheme, when connecting return flow portion 110 and cleaning equipment's suction portion 500, can guarantee still to separate each other between water conservancy diversion spare 100 and the suction portion 500 to, can guarantee that the connection reliability between suction portion 500 and the return flow portion 110 is higher, make the inside of water conservancy diversion space and return flow portion 110 isolated each other, prevent that gas from leaking in the flow path of predetermineeing.

Specifically, the size of the backflow part 110 exceeding the flow guide member 100 may be determined according to actual conditions, and the end of the suction part 500 facing the backflow part 110 may be inserted into the backflow part 110, or of course, the end of the suction part 500 facing the backflow part 110 may be sleeved outside the backflow part 110.

In addition, in the axial direction of the backflow part 110, one end of the backflow part 110, which is away from the suction part 500, may also extend beyond the guide cone 120, in this case, the connection space between the backflow port 111 and the guide space may be blocked to a certain extent, so that the gas flowing from the guide space into the dust collection cavity 311 may only flow along the side of the dust collection cavity 311 first, but may not flow directly to the backflow port 111, thereby further increasing the time and space for separating the gas and the impurities from each other, and enabling the gas and the impurities to be separated more thoroughly.

Specifically, the size of the portion of the backflow portion 110 extending along the opposite axial ends of the backflow portion and beyond the guide cone 120 may be determined according to practical situations, and is not limited herein.

As described above, the dust-gas separating mechanism may include a filtering structure, alternatively, as shown in fig. 6 and 7, the filtering structure is a filtering net 400, the filtering net 400 is disposed between the dust collecting part 310 and the housing 200, and the filtering net 400 is disposed in the communication passage between the air inlet 210 and the guide space. That is, the filter screen 400 is disposed inside the housing 200 and outside the dust collecting part 310, and the gas entering the dust collecting part 310 through the guiding space of the guiding member 100 is primarily filtered at the filter screen 400, and the primarily filtered gas can enter the dust collecting cavity 311 through the guiding space. The filter screen 400 can make the gas entering the dust collecting cavity 311 more clean, thereby further reducing the probability of impurities entering the return part 110 from the guide space. And, under the effect of filter screen 400, can also prevent that the debris that the size is great from blockking up the water conservancy diversion space.

Specifically, the filter screen 400 may be made of a material having relatively high structural strength, such as plastic or metal, and the coverage area of the filter screen 400 may be determined according to the sizes of the components, such as the housing 200 and the dust collecting part 310, and the positions of the air inlet 210 and the air guide space. The filter screen 400 may also be shaped like the return portion 110 and the dust collecting portion 310, and is a circular ring-shaped structure. The filter screen 400 has a plurality of filter holes, and the size and shape of the plurality of filter holes may be correspondingly the same, and the specific size of the filter holes may be selected according to the actual situation, which is not limited herein. The plurality of filtering holes are uniformly and regularly arranged to ensure that the filtering effects at all positions on the filter screen 400 are basically the same.

Optionally, the filter screen 400 comprises a blocking portion 410 and a filter portion 420, wherein the blocking portion 410 is arranged towards the air inlet 210. Under the condition, the gas entering the housing 200 from the gas inlet 210 along the axial direction of the gas inlet 210 is blocked by the blocking part 410, so that the gas cannot directly pass through the filter screen 400 and enters the flow guide space, in the process that the gas entering from the gas inlet 210 collides with the blocking part 410, sundries carried by the gas collide with the blocking part 410 under a large acting force, the inertia of the sundries is greatly reduced, the sundries in the gas are separated from the gas more easily and fall into the space between the filter screen 400 and the housing 200, and the primary separation of the sundries and the gas is completed.

The filter part 420 is connected to the side of the blocking part 410 close to the bottom of the housing 200, so that the gas can flow toward the side close to the bottom of the housing 200 after being blocked by the blocking part 410, and enter the filter 400 from the filter part 420. The existence of filter part 420 can guarantee on the one hand that gas can normally get into in filter screen 400 to the gas vent of final self-cleaning equipment is discharged, and on the other hand can also further filter the gas that gets into in filter screen 400, further blocks debris that carry in the gas through the filtration pore that sets up on filter part 420, promotes the cleanliness of the gas that gets into in filter screen 400.

Specifically, the blocking portion 410 and the filtering portion 420 may be formed by integrally molding metal or plastic, which may reduce the processing difficulty of the filter screen 400 and increase the structural strength of the entire filter screen 400 to a certain degree. Of course, the blocking portion 410 and the filtering portion 420 may also be formed by different materials, for example, the blocking portion 410 may be made of plastic, the filtering portion 420 may be formed by metal, the difficulty of forming a plurality of dense and fine filtering holes on the filtering portion 420 made of metal is relatively low, and after the filtering portion 420 made of metal is formed, the blocking portion 410 may be formed on the filtering portion 420 by injection molding, so that the two may form an integral structure. Of course, other materials and other processing methods may be used to form the filter screen 400, and for the sake of brevity, no further example is provided here.

In addition, as mentioned above, the axial acceleration section 121 of the baffle 100 is located on the side of the tangential acceleration section 122 facing away from the air intake side. In the case where the dust-gas separation mechanism is provided with the filter screen 400, as described above, the filter portion 420 is located on the side of the blocking portion 410 close to the bottom wall 230 of the housing 200, in which case the axial acceleration section 121 may be located on the side of the tangential acceleration section 122 away from the bottom wall 230 of the housing 200, that is, the tangential acceleration section 122 is located between the axial acceleration section 121 and the tangential acceleration section 122.

Under the condition of adopting the technical scheme, after the gas enters from the gas inlet 210, the gas firstly moves to the blocking part 410 along the axial direction of the gas inlet 210; the gas is blocked by the blocking part 410, changes the moving direction, and flows in the direction away from the blocking part 410 and close to the filtering part 420 along the axial direction of the backflow part 110; then, the gas flows to the filter part 420, changes the flow direction again, and flows into the filter screen 400 along the axial direction of each filter hole; then, the gas is blocked by the outer surface of the dust collecting part 310, changes direction again, moves towards the closing part 410 and away from the filtering part 420 along the axial direction of the backflow part 110 to reach the position of the flow guide member 100, and ensures that the gas can enter the dust collecting part 310 through the flow guide member 100; then, the gas continues to change the moving direction to enter the dust collecting chamber 311 from the guiding space (the moving direction is directed to the air inlet side along the exhaust side of the backflow part 110) to the air inlet side of the backflow part 110; thereafter, the gas continues to change the moving direction, moves to the exhaust side of the backflow part 110 through the backflow port 111 in a direction in which the intake side is directed to the exhaust side, and finally exits the cleaning apparatus through the suction part 500 and the exhaust port.

Based on the above situation, during the movement of the gas, each time the movement direction of the gas is changed, the impurities carried in the gas will be partially separated from the gas, and when the gas flows from the gas inlet side to the gas outlet side of the backflow part 110, a few impurities carried in the gas are left, so that the cleanliness of the gas entering the backflow part 110 is high. In order to further improve the cleaning degree of the gas exhausted from the self-cleaning device, a filter hypaete may be further disposed in the backflow portion 110 or on the exhaust side of the backflow portion 110, in which case, the cleaning degree of the gas exhausted from the self-cleaning device may be further improved, and the overall performance of the cleaning device may be improved. In addition, the filtered hpa may be assembled with the suction part 500 or the return part 110 in a detachable connection manner, so that in case the filtering performance of the filtered hpa is degraded to a certain extent, the filtered hpa may be cleaned by detaching the filtered hpa, or directly replaced with a new filtered hpa.

Optionally, the filter screen 400 includes a filter portion 420 and a flange 430, and the filter portion 420 in this embodiment may be the same as the filter portion 420 in the previous embodiment, that is, the filter screen 400 may include the filter portion 420, the flange 430 and the blocking portion 410. The flange 430 is of a flared structure, the flange 430 is connected to the side of the filter portion 420 close to the bottom wall 230 of the housing 200, and the flange 430 faces the bottom wall 230 of the housing 200. That is, the portion of the burring 430 closer to the bottom wall 230 of the case 200 is farther from the dust collection part 310, that is, closer to the side wall of the case 200, so that the distance between the burring 430 and the case 200 gradually decreases in a direction in which the exhaust side of the return part 110 is directed toward the intake side. Moreover, a preset interval is provided between the turned-over edge 430 and the side wall 240 of the housing 200, so that the sundries blocked by the filtering part 420 can fall to the side of the turned-over edge 430, which is far away from the filtering part 420, through the interval between the turned-over edge 430 and the housing 200, and under the action of the turned-over edge 430 with the flaring structure, the sundries which are separated from the air flow are prevented from being drawn into the air flow from the housing 200 again as much as possible.

Specifically, the flanges 430 and the filtering portion 420 may be made of the same material and formed in an integral manner, and the flanges 430 may be of a truncated cone-shaped surface structure or a drum-shaped structure, which both ensure that the flanges 430 form an expanded structure and face the bottom wall 230 of the housing 200. The distance between the flange 430 and the inner surface of the housing 200 may be selected according to the actual situation of the cleaning device, such as the working scene, and is not limited herein.

More specifically, the flange 430 may have a truncated cone-shaped surface configuration, and the degree of inclination of the flange 430 may affect the dimensions of the flange 430 in the axial direction of the return portion 110 and in the direction perpendicular to the axial direction of the return portion 110. The larger the included angle γ between the turned-up edge 430 and the axial line of the flow guide member 100 (i.e. the axial direction of the backflow portion 110), the better the effect of preventing the impurities on the side of the turned-up edge 430 departing from the filter portion 420 from entering the air flow again, but the negative effect is that the dust is easily accumulated on the turned-up edge 430, and the dust and the like accumulated on the turned-up edge 430 are also easily entered the air flow again from the filter portion 420 and enter the filter screen 400; on the contrary, when the included angle γ between the turned edge 430 and the axial direction of the backflow portion 110 is smaller, the capability of the turned edge 430 for blocking the impurities on the side away from the filtering portion 420 is reduced, and therefore, optionally, γ is larger than or equal to 25 degrees and smaller than or equal to 30 degrees, in this case, the blocking capability of the turned edge 430 for the impurities on the side away from the filtering portion 420 is stronger, and the impurities such as dust are not easy to accumulate on the surface of the turned edge 430 on the side facing the filtering portion 420, so as to further reduce the amount of the impurities entering the filter screen 400.

As described above, a part of the impurities carried in the gas entering the interior of the housing 200 from the gas inlet 210 of the housing 200 may be collected to the side of the flange 430 facing away from the filter portion 420 through the gap between the flange 430 and the housing 200, and accumulated at the bottom wall 230 of the housing 200. In the case that the distance between the turned-over edge 430 and the bottom wall 230 of the housing 200 is large, the amount of the sundries that can be accommodated in the housing 200 is relatively large, and accordingly, the size of the entire housing 200 is relatively large, and the convenience of the cleaning apparatus is poor, whereas in the case that the distance between the turned-over edge 430 and the bottom wall 230 of the housing 200 is small, the amount of the sundries that can be accommodated in the housing 200 is relatively small. Optionally, the distance between the flange 430 and the bottom wall 230 of the housing 200 is d1, and may be 32 ≦ d1 ≦ 36mm, and more specifically, d1 ≦ 34.2mm, in which case the housing 200, which is relatively small in overall size, also has a more satisfactory accommodation space.

As described above, the predetermined interval between the turned-over edge 430 and the side wall 240 of the housing 200 may prevent the impurities with larger particle sizes from entering the side of the turned-over edge 430 facing away from the filtering portion 420 in the case that the gap between the turned-over edge 430 and the side wall 240 of the housing 200 is relatively small, whereas the impurities separated from the air flow may be caused to be collected into the air flow again and enter the filtering mesh 400 in the case that the gap between the turned-over edge 430 and the side wall 240 of the housing 200 is relatively large. Optionally, the distance between the flange 430 and the side wall 240 of the housing 200 is d2, and 7.5 ≤ d2 ≤ 9mm, and more specifically, d2 ≤ 8.3mm, in this case, it can be ensured that most of the impurities can be collected from the space between the flange 430 and the side wall 240 of the housing 200 to the side of the flange 430 away from the filter part 420 in the normal use scene, and the impurities can be limited as much as possible from the side of the flange 430 away from the filter part 420 to cross the flange 430 and be re-collected into the air flow.

Optionally, a cover plate 320 is disposed in the dust collecting part 310, the cover plate 320 is located between the baffle 100 and the bottom wall 230 of the housing 200, and the cover plate 320 has a predetermined interval from the side of the dust collecting part 310. Under the above technical solution, when the gas entering the dust collecting cavity 311 through the guide space leaves the guide surface, part of the impurities are separated from the gas, and are collected from the gap between the cover plate 320 and the side portion of the dust collecting part 310 to the side of the cover plate 320 departing from the return part 110. Under the action of the cover plate 320, the impurities separated from the air flow and located in the dust collecting cavity 311 can be limited, and the air and the impurities are prevented from being gathered together again.

The cover plate 320 may be made of a hard material such as metal or plastic, and the cover plate 320 may be supported and fixedly connected to the bottom wall 230 of the housing 200, so as to ensure that the cover plate 320 may form a relatively fixed relationship with the dust collecting part 310, the housing 200, the backflow part 110, and the like, and ensure that a certain space is provided between the cover plate 320 and the bottom wall 230 of the housing 200 to provide a receiving space for impurities.

More specifically, the cover plate 320 may be a circular plate-shaped structure, in another embodiment of the present application, the cover plate 320 may be an umbrella-shaped structure, and the edge of the cover plate 320 extends toward the bottom wall 230 of the housing 200, in which case the cover plate 320 may also provide a guiding function for the impurities separated from the airflow to prevent the impurities from accumulating on the cover plate 320.

When the cover 320 is provided, the cover 320 is provided to face the return opening 111 of the return portion 110, and therefore, a certain distance is required between the cover 320 and the return portion 110, and the distance can be determined according to actual conditions such as the size of the return portion 110. Alternatively, the backflow part 110 may be a cylindrical structure, the inner diameter of the backflow part 110 may be 33mm, the size of the guide cone 120 in the axial direction of the backflow part 110 may be 22.1mm, the dust collection part 310 may be a cylindrical structure, and the inner diameter of the dust collection cavity 311 may be 53mm, in which case, the distance between the cover plate 320 of the umbrella structure and the backflow part 110 may be 11.3 mm.

In the case where cover plate 320 is provided, as the gas flows from the flow guide space into dust collection chamber 311, the gas in dust collection chamber 311 flows into return port 111 through the space between cover plate 320 and return portion 110, and the minimum area of the connection surface between cover plate 320 and the port of return portion 110 facing cover plate 320 is the air intake area of return port 111. Alternatively, the aforementioned air intake area is not smaller than the cross-sectional area of the return opening 111, in which case, it is possible to prevent the flow rate of the gas entering the return opening 111 from the air intake side of the return opening 111 from being large, and to generate a negative pressure in the vicinity of the return opening 111, thereby causing the gas entering the dust collection chamber 311 from the flow guide space to flow more easily directly to the return opening 111. Preferably, the air intake area may be 1.5 to 2 times the cross-sectional area of the return opening 111, in which case, the flow velocity of the gas in a certain area around the return opening 111 is relatively small, the pressure of the gas is relatively large, and the flow velocity of the gas flowing along the side portion attached to the dust collection chamber 311 is relatively fast and the pressure is relatively small, so that the impurities carried by the gas entering the dust collection chamber 311 from the guide space can be further prevented from directly entering the return opening 111.

As described above, the air entering the housing 200 from the air inlet 210 of the housing 200 is primarily filtered outside the filter screen 400, and then the air and the impurities are secondarily separated in the dust collecting cavity 311, and the impurities separated in the two filtering processes fall into the housing 200 and are substantially accumulated on the bottom wall 230 of the housing 200. Alternatively, by detachably connecting the housing 200 to the suction part 500, after dust accumulated in the housing 200 reaches a certain limit, the housing 200 may be detached from the suction part 500, and impurities collected in the housing 200 may be discharged, and after cleaning the housing 200, the housing 200 may be mounted back to the suction part 500.

In another embodiment of the present application, optionally, the housing 200 includes a side wall 240 and a bottom wall 230, the bottom wall 230 is detachably and hermetically connected to one end of the side wall 240, and the bottom wall 230 is hermetically connected to a side of the dust collecting part 310. Under the condition of adopting the technical scheme, the bottom wall 230 of the shell 200 is simultaneously in sealing connection with the side part of the dust collecting part 310 and the side wall 240 of the shell 200, so that the bottom wall 230, the side wall 240 and the side part can enclose two mutually isolated spaces to respectively contain impurities with different magnitudes, and impurity doping in the two spaces can be prevented, and adverse effect on the separation effect of the dust-gas separation mechanism can be generated. Meanwhile, in the case where the amount of the foreign substances in the housing 200 reaches a certain limit, or after the cleaning work is completed, etc., the foreign substances collected in the housing 200 and the dust collecting chamber 311 can be directly discharged by disassembling the bottom wall 230 and the side wall 240 without disassembling the entire housing 200.

Specifically, the side wall 240 and the bottom wall 230 of the housing 200 may be detachably connected to each other by a plurality of fasteners, such as snaps, which are spaced apart along the circumference of the side wall 240, so that the bottom wall 230 and the side wall 240 are reliably connected to each other. In order to improve the sealing performance, a flexible gasket or the like may be disposed between the bottom wall 230 and the side wall 240, and similarly, a flexible gasket or the like may be disposed between the bottom wall 230 and the side portion.

Alternatively, the side wall 240 and the bottom wall 230 of the housing 200 may be connected together by a hinge or the like, and the bottom wall 230 and the side wall 240 may be connected together by a detachable connection structure such as a snap. Under the condition that adopts above-mentioned technical scheme, the user is in the in-process of empting debris, only need open detachable connection structure such as buckle can, under the effect of hinge, lateral wall 240 and diapire 230 still link together, after debris are emptyd the completion, with diapire 230 cover again close on lateral wall 240 can, this makes the dismouting degree of difficulty of diapire 230 and lateral wall 240 less relatively.

As described above, the present application also discloses a cleaning apparatus including the suction part 500 and any one of the dust and air separating mechanisms described above, the suction part 500 having an exhaust port, and the suction part 500 further communicating with the exhaust side of the backflow part 110, in a case where the suction part 500 is operated, gas enters the cleaning apparatus from the air inlet 210 of the housing 200, flows in the dust and air separating mechanism, and is finally exhausted to the outside of the cleaning apparatus from the exhaust port of the suction part 500.

The utility model discloses what the key description in the above embodiment is different between each embodiment, and different optimization characteristics are as long as not contradictory between each embodiment, all can make up and form more preferred embodiment, consider that the literary composition is succinct, then no longer describe here.

The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (19)

1. A guide member applied to a dust-gas separating mechanism in a cleaning device, the dust-gas separating mechanism comprising a backflow part (110) and a dust collecting part (310), the backflow part (110) having a backflow port (111), the backflow part (110) having an air inlet side and an air outlet side, the air outlet side being configured to communicate with an air outlet of the cleaning device, the air outlet side communicating with the air inlet side through the backflow port (111), the dust collecting part (310) having a dust collecting cavity (311), the backflow part (110) being disposed within the dust collecting cavity (311), characterized in that,

the flow guide part (100) comprises a plurality of flow guide conical blades (120), the flow guide conical blades (120) are arranged between the backflow part (110) and the dust collecting part (310) along the circumferential direction of the backflow part (110), each flow guide conical blade (120) is provided with a flow guide surface, the flow guide surfaces spirally extend along the axial direction of the flow guide part (100), each flow guide surface comprises a tangential acceleration section (122), a flow guide space is formed between any two adjacent flow guide surfaces, the air inlet side is communicated with the air inlet (210) of the cleaning equipment through the flow guide space, and fluid is guided to flow towards the air inlet side of the backflow part (110) by the tangential acceleration sections (122).

2. The flow guide of claim 1, wherein the flow guide surface further comprises an axial acceleration section (121), the axial acceleration section (121) is connected to a side of the tangential acceleration section (122) facing away from the air inlet side, an included angle between any position on the axial acceleration section (121) and the axial direction of the backflow portion (110) is α, an included angle between any position on the tangential acceleration section (122) and the axial direction is β, and α < β.

3. Flow guide element according to claim 2, characterized in that 0 < α < 30 °, 15 ° < β < 90 °.

4. Flow guide according to claim 2, characterized in that the axial acceleration section (121) has a dimension L1 in the axial direction of the flow return (110), the tangential acceleration section (122) has a dimension L2 in the axial direction of the flow return (110), L1 > L2;

and/or the axial acceleration section (121) has a dimension L3 in a direction perpendicular to the axial direction of the return portion (110), and the tangential acceleration section (122) has a dimension L4 in a direction perpendicular to the axial direction of the return portion (110), L3 < L4.

5. Flow guide according to claim 1, characterized in that the flow guide surface further comprises a straight section (123), the straight section (123) is perpendicular to the axial direction of the flow guide (100), and the straight section (123) is connected to the tangential acceleration section (122) on the side close to the air inlet side.

6. Flow guide according to claim 1, characterized in that the sum of the cross-sectional areas of the flow guide spaces is equal to the cross-sectional area of the return opening (111).

7. The baffle of claim 1, wherein the plurality of baffle cone blades (120) have the same shape and size, and the plurality of baffle cone blades (120) are uniformly distributed, and the number of baffle cone blades (120) is 7.

8. A dust-air separating mechanism for use in a cleaning apparatus comprising a suction part (500), characterized in that the dust-air separating mechanism comprises a return part (110), a housing (200), a dust collecting part (310) and a deflector (100) according to any one of claims 1 to 7, the return part (110) having a return opening (111), the return part (110) having an air inlet side and an air outlet side, the air outlet side communicating with the air inlet side through the return opening (111), the housing (200) having an air inlet (210), a receiving chamber (220) and a suction opening communicating with the suction part (500), the dust collecting part (310) being mounted in the receiving chamber (220), the dust collecting part (310) having a dust collecting chamber (311), the return part (110) and the deflector (100) both being mounted in the dust collecting chamber (311), and the flow guide piece (100) is positioned between the backflow part (110) and the dust collection part (310), the exhaust side is communicated with the exhaust port of the cleaning equipment, and the air inlet side is communicated with the air inlet (210) through the flow guide space of the flow guide piece (100).

9. The dust-gas separating mechanism of claim 8, wherein the backflow portion (110) extends toward one end of the suction portion (500) beyond the deflector cone (120) in an axial direction of the deflector (100); and/or the return portion (110) extends away from an end of the suction portion (500) and beyond the guide cone (120).

10. The dust-gas separating mechanism according to claim 8, further comprising a filter screen (400), wherein the filter screen (400) is disposed between the dust collecting part (310) and the housing (200), and the filter screen (400) is disposed in a communication passage between the air inlet (210) and the flow guiding space.

11. The dust-gas separating mechanism according to claim 10, wherein the filter screen (400) includes a blocking portion (410) and a filter portion (420), the blocking portion (410) is disposed toward the air inlet (210), and the filter portion (420) is connected to a side of the blocking portion (410) near the bottom wall (230) of the housing (200) in an axial direction of the deflector (100).

12. The dust-gas separating mechanism of claim 10, wherein the filter screen (400) comprises a filter portion (420) and a flange (430), the flange (430) is of a flared structure, the flange (430) is connected to a side of the filter portion (420) close to the bottom wall (230) of the housing (200), the flange (430) faces the bottom wall (230) of the housing (200), and the flange (430) is spaced from the side wall (240) of the housing (200) by a predetermined distance.

13. The dust-gas separating mechanism of claim 12, wherein the angle between the flange (430) and the axis of the deflector (100) is γ, and γ is between 25 ° and 30 °.

14. The dust-gas separating mechanism of claim 12, wherein the distance between the flange (430) and the bottom wall (230) of the housing (200) is d1, 32 ≤ d1 ≤ 36 mm;

and/or the distance between the flanging (430) and the side wall (240) of the shell (200) is d2, and d2 is more than or equal to 7.5 and less than or equal to 9 mm.

15. The dust-air separating mechanism of claim 8, wherein a cover plate (320) is disposed in the dust collecting part (310), the cover plate (320) is located between the air guide member (100) and the bottom wall (230) of the housing (200), and the cover plate (320) has a predetermined interval from the side of the dust collecting part (310).

16. The dirt-gas separation mechanism of claim 15, wherein the cover plate (320) is an umbrella-shaped structure, and an edge of the cover plate (320) extends in a direction adjacent to the bottom wall (230) of the housing (200).

17. The dust-gas separating mechanism of claim 15, wherein the air inlet area between the return portion (110) and the cover plate (320) is 1.5 to 2 times the cross-sectional area of the return port (111).

18. The dust-gas separating mechanism of claim 8, wherein the housing (200) comprises a side wall (240) and a bottom wall (230), the bottom wall (230) is detachably and hermetically connected to one end of the side wall (240), and the bottom wall (230) is hermetically connected to a side of the dust collecting part (310).

19. A cleaning apparatus comprising a suction section (500) and the dust-air separating mechanism of any one of claims 8 to 18, the suction section (500) having an exhaust port, the suction section (500) communicating with an exhaust side of the return section.

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