Dust collection device and centrifugal separation assembly thereof

Abstract

The present application discloses a dust collecting device and a centrifugal separation component thereof, wherein the dust collecting device comprises a housing and a centrifugal separation component, wherein at least a portion of the centrifugal separation component is disposed in the housing, and wherein the centrifugal separation component comprises a driving member, an impeller, and a separation member, wherein an output shaft of the driving member is rotatably connected to the impeller and the separation member, respectively, so as to drive the impeller and the separation member to rotate, and the impeller is used to form an airflow flowing from the outside of the separation member into the separation member by rotating. In the above manner, the present application improves separation efficiency.

Description

Technical Field

[0001] The present application relates to the technical field of cleaning equipment, in particular to a dust suction device and its centrifugal separation component. Background Art

[0002] With the rapid development of China's science and technology level and industrial manufacturing level, cleaning equipment, such as floor sweeping robots, vacuum cleaners, etc., has been rapidly popularized in people's lives and work, making people's lives more convenient and greatly improving their sense of happiness, with broad market prospects.

[0003] Taking a vacuum cleaner as an example, the vacuum cleaner needs to generate airflow to adsorb garbage, and generally needs to separate the garbage and the airflow. At present, the separation efficiency of the vacuum cleaner is low and it is easy to cause blockage. Summary of the Invention

[0004] The main technical problem to be solved by the present application is to provide a dust suction device and its centrifugal separation component, which can improve the problem of low separation efficiency in the prior art.

[0005] To solve the above technical problem, one technical solution adopted by the present application is: to provide a dust suction device, the dust suction device includes a housing and a centrifugal separation component, at least part of the centrifugal separation component is arranged in the housing, the centrifugal separation component includes a driving member, an impeller and a separation member, and the output shaft of the driving member is respectively rotationally connected to the impeller and the separation member to drive the impeller and the separation member to rotate. The impeller is used to form an airflow that flows from the outside of the separation member into the separation member through rotation.

[0006] To solve the above technical problem, another technical solution adopted by the present application is: to provide a centrifugal separation component, the centrifugal separation component includes: a driving member, an impeller and a separator, and the output shaft of the driving member is respectively connected to the impeller and the separator to drive the impeller and the separator to rotate. The impeller is used to form an airflow that flows from the outside of the separator into the separator through rotation.

[0007] The beneficial effect of the present application is: different from the prior art, by connecting the output shaft of the driving member to the impeller and the separation member, the impeller and the separation member can be driven to rotate simultaneously, and the effect of centrifugal separation can be achieved, so that garbage can be separated more effectively, effectively improving the separation efficiency, and then improving the filtration efficiency. Compared with the case where the impeller and the separation member each require a driving member, the effect of "one motor with multiple functions" can be effectively achieved, saving components, making the structure more compact in structure, saving volume, lighter in weight, lower in energy consumption, and also making the dust suction and dust-gas separation more coordinated and synchronous, further improving the dust suction and dust-gas separation effect. Description of the Drawings

[0008] Figure 1It is a three-dimensional structure schematic diagram of an embodiment of the dust suction device of the present application;

[0009] Figure 2 is Figure 1 a cross-sectional structure schematic diagram of the dust suction device shown;

[0010] Figure 3 is Figure 2 a cross-sectional structure schematic diagram of the dust suction device shown along the cutting line A-A;

[0011] Figure 4 It is a cross-sectional structure schematic diagram of an embodiment of the centrifugal separation component of the present application;

[0012] Figure 5 is Figure 4 a cross-sectional structure schematic diagram of the centrifugal separation component shown along the cutting line B-B;

[0013] Figure 6 is Figure 4 an enlarged structure schematic diagram of the partial structure H of the centrifugal separation component shown;

[0014] Figure 7 It is a three-dimensional structure schematic diagram of an embodiment of the dust cup of the present application;

[0015] Figure 8 is Figure 7 an exploded structure schematic diagram of the dust cup shown;

[0016] Figure 9 is Figure 7 a structure and state change schematic diagram of the clamping sub-component in the dust cup shown;

[0017] Figure 10 is Figure 7 a structure schematic diagram of the fixed cup body in the dust cup shown;

[0018] Figure 11 It is an assembly structure schematic diagram of the bracket assembly and the floor mopping assembly in an embodiment of the bracket assembly of the present application;

[0019] Figure 12 is Figure 11 a bottom view structure schematic diagram of the bracket assembly shown;

[0020] Figure 13 is Figure 11 an exploded structure schematic diagram of the floor mopping assembly and the bracket assembly shown;

[0021] Figure 14 is Figure 11 another exploded structure schematic diagram of the floor mopping assembly and the bracket assembly shown;

[0022] Figure 15 is Figure 12Schematic diagram of an exemplary cross-sectional structure of the shown bracket assembly along the cutting line C-C. Detailed implementation manner

[0023] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0024] As Figure 1 shown, the dust suction device 1 described in the embodiment of the present application for dust suction devices may include: a device main body 10 and a dust cup 20. The device main body 10 may be connected to the dust cup 20. The device main body 10 is used to provide a suction force so that a negative pressure is generated in the dust cup 20, and then the garbage can be sucked into the dust cup 20 through the air inlet pipe 118 along with the air flow, and then retained in the dust cup 20. The dust cup 20 may also be referred to as a dust box and is used to collect garbage. The garbage may include dust, debris, hair, etc.

[0025] As Figure 2 shown, the device main body 10 may include a housing 110 and a separation assembly 120. The housing 110 may be used to accommodate related components and play a corresponding protective role. For example, at least a part of the separation assembly 120 is disposed in the housing 110. The separation assembly 120 may be used to drive the air flow to form an air flow so that a negative pressure is generated in the dust cup 20. The garbage can enter the dust cup 20 along with the air flow under the action of the negative pressure. The separation assembly 120 may also be used to separate the air and the garbage, and the garbage is separated and retained in the dust cup 20. Of course, the device main body 10 may further include a battery 130, and the battery 130 may be accommodated in the housing 110. The battery 130 may supply electrical energy to the separation assembly 120 and the like.

[0026] Optionally, the housing 110 may be provided with a receiving cavity 111, and at least a part of the separation assembly 120 may be received in the receiving cavity 111. The housing 110 may be provided with a battery compartment 112. The battery 130 may be received in the battery compartment 112. The receiving cavity 111 may communicate with the battery compartment 112. The separation assembly 120 may communicate with the battery compartment 112. Specifically, the separation assembly 120 may be configured to form an air flow flowing from outside the separation assembly 120 into the separation assembly 120. The air flow formed by the separation assembly 120 may enter the dust cup 20 from outside the dust cup 20, and then flow into the separation assembly 120 from outside the separation assembly 120. The garbage objects are intercepted outside the separation assembly 120 and remain in the dust cup 20. The air flow may further flow from inside the separation assembly 120 into the battery compartment 112, so as to accelerate the air flow in the battery compartment 112, take away the heat of the battery 130, improve the reliability of the working environment of the battery 130, and further improve the discharge efficiency and service life of the battery 130. After the air flow passes through the battery 130 and takes away the heat, it may be discharged from the battery compartment 112.

[0027] Optionally, as Figure 3 shown, the battery compartment 112 may be disposed around the receiving cavity 111. That is to say, the battery compartment 112 may surround the outer periphery of the receiving cavity 111, so as to form a relatively large annular battery compartment 112, increase the heat dissipation space of the battery 130, facilitate air flow, and thus more quickly take away the heat. The annularly arranged battery compartment 112 also facilitates the arrangement of the battery 130. For example, the battery 130 may include a plurality of battery cells 131 that are coupled to each other, and the plurality of battery cells 131 may be spaced apart in the battery compartment 112. Specifically, the plurality of battery cells 131 may be spaced apart around the axis of the battery compartment 112. Further, the extending direction of the battery compartment 112 may be the same as the extending direction of the receiving cavity 111. The extending direction is also the length direction. Of course, the receiving cavity 111 may be a cylindrical cavity, and the receiving cavity 111 may be coaxially arranged with the battery compartment 112. In this case, the extending direction is the axis direction.

[0028] Optionally, the housing 110 may be formed with a communicating cavity 113. The communicating cavity 113 may communicate the accommodating cavity 111 and the battery compartment 112. Specifically, one end of the battery compartment 112 may communicate with the communicating cavity 113. The bottom of the accommodating cavity 111 may communicate with the communicating hole 114. One end of the accommodating cavity 111 opposite to its bottom is an opening, and the separating component 120 may be accommodated in the accommodating cavity 111 through this opening. Further, a communicating hole 114 may be provided in the bottom of the accommodating cavity 111. The communicating hole 114 may communicate the accommodating cavity 111 and the communicating cavity 113. By providing a communicating cavity 113 between the battery compartment 112 and the accommodating cavity 111, the airflow can be made uniform, thereby reducing noise, and a larger cavity can also be formed, facilitating the dissipation of the heat of the battery 130, enabling the airflow to better carry away the heat of the battery 130 and reducing the surface temperature of the battery 130.

[0029] Optionally, a shock-absorbing gasket 116 may be provided between the separating component 120 and the bottom of the accommodating cavity 111. The shock-absorbing gasket 116 may abut between the separating component 120 and the bottom of the accommodating cavity 111. The shock-absorbing gasket 116 may surround the communicating hole 114 so that the separating component 120 communicates with the communicating hole 114. This can improve the sealing performance, reduce the leakage of the airflow into the accommodating cavity 111 outside the separating component 120, and more airflow enters the communicating cavity 113 and the battery compartment 112, improving the heat dissipation effect of the battery 130 and also ensuring the adsorption force of the dust collection device 1.

[0030] Optionally, the device main body 10 may include an annular filter element 117. Specifically, one end of the battery compartment 112 may communicate with the accommodating cavity 111, and the annular filter element 117 may be accommodated at one end of the battery compartment 112 to filter the airflow. In other words, the annular filter element 117 is sleeved on the outer periphery of the accommodating cavity 111 and then accommodated at one end of the battery compartment 112. When the airflow enters the battery compartment 112 through the communicating cavity 113, the annular filter element 117 may further filter the airflow to reduce the pollution of the airflow to the battery compartment 112. The annular filter element 117 is, for example, a high-efficiency filter (HEPA). Further, an air outlet 115 communicating with the battery compartment 112 is provided circumferentially on the outer peripheral side of the battery compartment 112 adjacent to its other end to discharge the airflow. That is, the air outlet 115 is also annularly arranged and may be an open ring or a closed ring. The number of the air outlets 115 may be at least one. By providing the air outlet 115 on the outer peripheral side of the other end of the battery compartment 112, the airflow can have a longer travel in the battery compartment 112, can better contact the battery cell 131, and further providing the air outlet 115 circumferentially can improve the air outlet efficiency and accelerate the air flow.

[0031] The separation component 120 may include a blower for forming an air flow and a separator for separating dust and gas. The separator may be a cyclone separator or a filter. Of course, the separation component 120 may also be a conventional separation component 120 in the prior art.

[0032] Through research by the inventors of the present application, it is found that the filter is easily blocked by dust, resulting in the loss of the filtering function and affecting the working effect of the entire vacuum cleaner 1. The cyclone separator will cause a large pressure loss in the entire vacuum cleaner 1, making it difficult to improve the suction power and efficiency value of the vacuum cleaner 1. Therefore, the separation component 120 of this embodiment may be set as a centrifugal separation component 120a, which separates the garbage and the air flow through the action of centrifugal force, and can improve the above technical problems.

[0033] For the content of the centrifugal separation component 120a, reference may be made to the detailed description of the centrifugal separation component embodiment of the present application as follows.

[0034] As Figure 2 and Figure 4 shown, the centrifugal separation component 120a described in the centrifugal separation component embodiment of the present application may include a motor housing 121, a blower housing 122, a driving member 123, an impeller 124, and a separating member 125.

[0035] The blower housing 122 may be connected to one end of the motor housing 121, and the interior of the blower housing 122 and the interior of the motor housing 121 may be in communication. Optionally, the blower housing 122 and the motor housing 121 are integrally formed. Of course, the blower housing 122 and the motor housing 121 may also be separately provided and can be assembled and connected.

[0036] The motor housing 121 may be provided in a cylindrical shape. The blower housing 122 may also be provided in a cylindrical shape. One end of the blower housing 122 is connected to one end of the motor housing 121 and is in communication with each other. Optionally, the diameter of one end of the blower housing 122 may be less than or equal to the diameter of one end of the motor housing 121. The other end of the blower housing 122 may be in communication with the communication cavity 113. The other end of the motor housing 121 may be in communication with the separating member 125. The motor housing 121 and the blower housing 122 may form a relatively closed air duct, and may further form a relatively closed air duct with the communication cavity 113 and the separating member 125.

[0037] The impeller 124 can be disposed inside the blower housing 122. The driving member 123 can be disposed inside the motor housing 121. The separating member 125 can be disposed at the other end of the motor housing 121 and outside the motor housing 121. The output shaft 1231 of the driving member 123 can be respectively in transmission connection with the impeller 124 and the separating member 125 to drive the impeller 124 and the separating member 125 to rotate. The output shaft 1231 of the driving member 123 can drive the impeller 124 and the separating member 125 to rotate simultaneously. During the rotation process, the separating member 125 can generate centrifugal force, and then use the centrifugal force to "throw away" the garbage objects, which then fall into the dust cup 20.

[0038] By arranging the output shaft 1231 of the driving member 123 to connect the impeller 124 and the separating member 125, the impeller 124 and the separating member 125 can be driven to rotate simultaneously, and the effect of centrifugal separation can be achieved, so that the garbage objects can be separated more effectively, effectively improving the separation efficiency, and then the filtration efficiency can be improved. Compared with the case where the impeller 124 and the separating member 125 each require a driving member 123, this embodiment effectively realizes the effect of "one motor with multiple functions", which can save components, make the structure more compact in structure, save volume, be lighter in weight, and lower in energy consumption. Moreover, it can also make the dust collection and dust-gas separation more coordinated and synchronous, and improve the dust collection and dust-gas separation effects.

[0039] The driving member 123 is, for example, a motor, specifically, it can be a servo motor or a stepping motor, etc. The battery 130 can supply electrical energy to the driving member 123 to make it work normally. The impeller 124 can have fan blades 1241. The impeller 124 can be used to form an air flow that flows from outside the separating member 125 into the separating member 125 by rotation. The separating member 125 can be used to separate garbage objects and air. Specifically, the separating member 125 can be used to generate centrifugal force by rotation. When the garbage objects contact the separating member 125 along with the air flow, they are separated under the action of centrifugal force and then fall into the dust cup 20, while the air flow will continue to enter the separating member 125 and then enter the communication cavity 113.

[0040] In order to be able to better improve the pressure and speed of the air flow entering the battery compartment 112, the centrifugal separation assembly 120a described in this embodiment can further include a supercharger 126, also called a diffuser, for increasing the pressure of the air flow entering the communication cavity 113 / battery compartment 112. Specifically, the supercharger 126 can be disposed at the other end of the blower housing 122 to increase the pressure of the air flow after passing through the impeller 124, so that the pressurized air flow flows into the communication cavity 113. In this way, the speed of the air flow in the battery compartment 112 can be effectively increased, and then the heat of the battery 130 can be taken away faster to protect the battery 130. The supercharger 126 in this embodiment can be an existing supercharger 126.

[0041] Optionally, the separating member 125 and the impeller 124 may be located on the same side of the driving member 123, or may be located on different sides of the driving member 123. Further, the output shaft 1231 of the driving member 123 may extend toward the two opposite sides of the driving member 123, and the separating member 125 and the impeller 124 may be located on different sides of the driving member 123. In this way, the separating member 125 and the impeller 124 can be better arranged, reducing the possibility of interference between the separating member 125 and the impeller 124 during rotation, and making the rotation of both smoother.

[0042] Since the rotational speeds required for centrifugal separation and suction may be different, the centrifugal separation assembly 120a may further include a gearbox 127. The gearbox 127 is, for example, a reduction gearbox, and the rotational speed output through the gearbox 127 is lower than the rotational speed of the output shaft 1231 of the driving member 123 itself. The gearbox 127 may be disposed inside the motor housing 121.

[0043] The output shaft 1231 of the driving member 123 may be connected to the impeller 124 on one side of the driving member 123. The output shaft 1231 of the driving member 123 is connected to the gearbox 127 on the other side of the driving member 123. In this regard, there may be two situations in this embodiment. One is that the gearbox 127 has an independent input shaft, and the output shaft 1231 of the driving member 123 is connected to the input shaft of the gearbox 127, for example, through a coupling, a gear, or a belt for transmission connection; the other is that the output shaft 1231 of the driving member 123 directly serves as the input shaft of the gearbox 127, and this can also be considered as the output shaft 1231 of the driving member 123 being connected to the input shaft of the gearbox 127 on the other side of the driving member 123. The output shaft 1271 of the gearbox 127 may be connected to the separating member 125, and thus can drive the separating member 125 to rotate.

[0044] For the content of the separating member 125 in this embodiment, reference may be made to the detailed description of the separating member 125 embodiment of the present application below.

[0045] As Figure 4 shown, the separating member 125 described in this embodiment may be a filter structure. Specifically, the separating member 125 may include a side wall 1251 and a bottom wall 1252. The side wall 1251 may be provided in a cylindrical shape, and the side wall 1251 may be connected to the bottom wall 1252 to enclose a filtering cavity 1250. That is, the side wall 1251 and the bottom wall 1252 may jointly enclose the filtering cavity 1250. Airflow may flow from outside the filtering cavity 1250 into the filtering cavity 1250, so that the garbage objects are intercepted outside the filtering cavity 1250. The side wall 1251 may be provided in a straight cylindrical shape or in a conical shape. The driving member 123 may be used to drive the separating member 125 to rotate around the axis of the side wall 1251 to achieve the effect of centrifugal separation.

[0046] Specifically, the side wall 1251 is closer to the driving member 123 than the bottom wall 1252. Further, the side wall 1251 can be disposed opposite to the other end of the motor housing 121.

[0047] Further, the separating member 125 can further include a top wall 1253. The side wall 1251 can be connected between the top wall 1253 and the bottom wall 1252, and can jointly enclose a filtering cavity 1250. One end of the side wall 1251 can be connected to the top wall 1253, and the other end of the side wall 1251 can be connected to the bottom wall 1252. The top wall 1253 can face the motor housing 121 and can be docked with the other end of the motor housing 121. The bottom wall 1252 can face away from the other end of the motor housing 121. The side wall 1251 can be further arranged in a conical shape, and its diameter gradually decreases in the direction from the top wall 1253 to the bottom wall 1252. The output shaft 1271 of the transmission 127 can be connected to the top wall 1253. Further, the output shaft 1271 of the transmission 127 can pass through the top wall 1253 and be further connected to the bottom wall 1252, so that the supporting effect of the output shaft 1271 of the transmission 127 on the separating member 125 is better and the fixing effect is better.

[0048] The filtering cavity 1250 can communicate with the inside of the motor housing 121 through the top wall 1253. Specifically, the top wall 1253 can be provided with a through-flow hole 1254 communicating with the filtering cavity 1250, and the filtering cavity 1250 can communicate with the inside of the motor housing 121 through the through-flow hole 1254. Thus, the air flow can enter the filtering cavity 1250 from outside the separating member 125, and then flow through the motor housing 121 and the fan housing 122 in sequence through the through-flow hole 1254, and then enter the communication cavity 113.

[0049] To improve the sealing performance between the separating member 125, the motor housing 121 and the fan housing 122, the centrifugal separation assembly 120a described in this embodiment can further include a wear-resistant gasket 1255. The wear-resistant gasket 1255 can be a rubber gasket, a ceramic gasket or a silicone gasket, etc. The wear-resistant gasket 1255 is connected to the other end of the motor housing 121 and can abut against the top wall 1253 or the side wall 1251. During the rotation of the side wall 1251, the side wall 1251 or the bottom wall 1252 can abut against the wear-resistant gasket 1255 and can rotate relative to the wear-resistant gasket 1255, so that the sealing can be maintained during the rotation. Of course, the wear-resistant gasket 1255 can be connected to the top wall 1253 or the side wall 1251, so that the wear-resistant gasket 1255 can rotate with the side wall 1251 and then rotate relative to the other end of the motor housing 121.

[0050] The wear-resistant sealing gasket 1255 can surround the flow-through hole 1254. In this way, the outer periphery of the flow-through hole 1254 can be sealed, so that the air flow flowing out of the flow-through hole 1254 can better flow into the motor housing 121. On the one hand, the adsorption capacity and cleaning capacity of the dust collection device 1 are ensured, and on the other hand, the heat dissipation effect of the battery 130 can also be ensured.

[0051] In the separating member 125, at least the side wall 1251 can be provided with a filtering hole 1256 communicating with the filtering cavity 1250. The air flow can enter the filtering cavity 1250 through the filtering hole 1256, and the garbage objects are separated under the action of centrifugal force. Specifically, as Figure 5 shown, the axis of the filtering hole 1256 can not intersect with the axis of the side wall 1251. That is, the axial direction of the filtering hole 1256 is different from the radial direction of the side wall 1251. In other words, the filtering hole 1256 can be an inclined hole.

[0052] As Figure 5 shown, the included angle α between the axis direction m of the filtering hole 1256 from outside the filtering cavity 1250 to inside the filtering cavity 1250 and the tangential direction n of the tangent corresponding to the filtering hole 1256 on the side wall 1251 is an acute angle. The included angle α is, for example, 20°-80°, optionally 30°-60°, and optionally 45°. The tangent corresponding to the filtering hole 1256 on the side wall 1251 can refer to the tangent on the outer peripheral surface of the side wall 1251 passing through the center of the orifice of the filtering hole 1256 outside the filtering cavity 1250. The tangential direction of this tangent is related to the rotation direction of the side wall 1251, and the tangential direction can point to the rotation direction, Figure 5 The shown rotation direction is counterclockwise. The center of the orifice of the filtering hole 1256 can be the center of a circle, the geometric center, or the geometric centroid, etc. The axis of the filtering hole 1256 intersects with the corresponding tangent.

[0053] Through the above structural setting of the filtering hole 1256, similar to the orifice of the filtering hole 1256 outside the filtering cavity 1250 facing away from the rotation direction, the orifice of the filtering hole 1256 outside the filtering cavity 1250 and the orifice inside the filtering cavity 1250 form a similar "one in front and one behind" in the rotation direction, which can reduce the direct impact of the air flow flowing in from the dust cup 20 into the filtering hole 1256, thereby reducing the entry of garbage objects into the filtering cavity 1250, improving the centrifugal separation effect, and at the same time preventing the garbage objects from blocking the filtering hole 1256, thereby improving the smoothness of the air flow flowing into the filtering cavity 1250 and ensuring the adsorption force of the dust collection device 1.

[0054] Optionally, Figure 6 shows Figure 4 an exemplary situation of the local structure H in Figure 6As shown, the orifice of the filtering hole 1256 outside the filtering chamber 1250 can be closer to the bottom wall 1252 than its orifice inside the filtering chamber 1250. Thus, the orifices at both ends of the filtering hole 1256 form an effect similar to "one high and one low", and the outer orifice is lower while the inner orifice is higher, which can further reduce the probability of garbage objects entering the filtering hole 1256 and further prevent the garbage objects from blocking the filtering hole 1256.

[0055] Optionally, a set of filtering holes 1256 can be provided in the side wall 1251 along its circumferential direction. The number of each set of filtering holes 1256 can be at least one, for example, a plurality of spaced-apart ones, specifically 24. The side wall 1251 can be provided with multiple sets of filtering holes 1256 at intervals along its axial direction. The number of each set of filtering holes 1256 provided in the axial direction of the side wall 1251 can be the same or different. By providing multiple sets of filtering holes 1256 on the side wall 1251, the filtering effect and the adsorption capacity are effectively improved.

[0056] Of course, the bottom wall 1252 can also be provided with filtering holes 1256. The axis of the filtering holes 1256 provided on the bottom wall 1252 does not coincide with the axis of the side wall 1251.

[0057] Through the above structural arrangement of the filtering holes 1256, during the rotation of the separating member 125, the garbage objects can be well centrifugally separated, and the probability of blocking the filtering holes 1256 is reduced, so that cleaner air flow enters the filtering chamber 1250, while the garbage objects remain in the dust cup 20.

[0058] For the content of the dust cup 20 in the embodiment of the dust collection device of the present application, reference can be made to the following detailed description of the embodiment of the dust cup assembly of the present application.

[0059] The dust cup assembly described in the embodiment of the dust cup assembly of the present application may include a dust cup 20 and a separator. The separator can be used to separate the air flow and the garbage objects. The separator can be a filter or a cyclone separator in an existing dust collection device, or the separating member 125 described in the embodiment of the centrifugal separation assembly of the present application above.

[0060] At least a part of the separator can be accommodated in the dust cup 20 so that the garbage objects can be retained in the dust cup 20. The dust cup 20 in this embodiment can effectively improve the efficiency of garbage dumping. Specifically, for the content of the dust cup 20 in this embodiment, reference can be made to the following detailed description of the embodiment of the dust cup of the present application.

[0061] As Figure 7 shown, the dust cup 20 described in the embodiment of the dust cup of the present application may include a fixed cup body 210 and a disposable cup body 220. As Figure 2 and Figure 7As shown, the fixed cup body 210 can be used to connect to the device main body 10, for example, it can be connected to the housing 110, and further, the housing 110 can be connected in a detachable manner.

[0062] The disposable cup body 220 can be detachably connected to the fixed cup body 210 and communicate with the fixed cup body 210 to be able to hold garbage objects, so that the disposable cup body 220 can be removed together with the garbage objects after use. The disposable cup body 220 is a disposable consumable. After the dust suction device 1 finishes working, the user can directly remove the disposable cup body 220 from under the fixed cup body 210, and then discard the disposable cup body 220 together with the garbage objects inside it.

[0063] By setting the disposable cup body 220 to be detachably connected to the fixed cup body 210, it is possible to conveniently remove the disposable cup body 220 together with the garbage objects after use, achieve use-and-discard, improve the cleaning efficiency of the dust box, facilitate the user to empty the dust, and thus there is no need to frequently clean the dust cup 20. Moreover, directly removing the disposable cup body 220 also eliminates the need to scrape the garbage objects attached to the inner wall with a brush or the like as in the prior art, reducing the pollution of the garbage objects to the user or the environment and improving the use experience.

[0064] The fixed cup body 210 can be arranged in a cylindrical shape. The disposable cup body 220 can be arranged in a barrel shape. One end of the fixed cup body 210 can be used to connect to the device main body 10 of the dust suction device 1, such as the housing 110. The other end of the fixed cup body 210 can be detachably connected to the open end of the disposable cup body 220.

[0065] The fixed dust cup 20 and the disposable dust cup 20 can be detachably connected through a snap structure, a threaded structure, an adhesive structure, a tight fit structure, a bolt structure or a screw structure, etc.

[0066] Taking the snap structure as an example, as Figure 7 shown, the dust cup 20 can include a snap member 230, and the fixed cup body 210 and the disposable cup body 220 can be snap-connected through the snap member 230. By connecting the fixed cup body 210 and the disposable cup body 220 through the snap member 230, quick connection and disconnection can be achieved, improving the cleaning efficiency. Optionally, in order to achieve good negative pressure inside the dust cup 20 and ensure the dust collection effect, a sealing ring 250 can be provided at the connection between the fixed cup body 210 and the disposable cup body 220. The sealing ring 250 can abut against the fixed cup body 210 and the disposable cup body 220, thereby reducing air leakage, ensuring a large negative pressure, and reducing the loss of adsorption force.

[0067] Specifically, as Figure 7 and Figure 8As shown, the buckle member 230 may include a support sub-member 231 and a clamping sub-member 232. The clamping sub-member 232 is rotatably connected to the support sub-member 231. There are various connection relationships among the clamping sub-member 232, the support sub-member 231, the fixed cup 210, and the disposable cup 220.

[0068] The first case: As Figure 8 shown, the support sub-member 231 may be fixedly connected to the fixed cup 210. The clamping sub-member 232 is used to clamp the disposable cup 220 so that clamping or unclamping can be achieved by rotating relative to the support sub-member 231.

[0069] For the first case, a card slot 240 may be formed on the outer periphery of the disposable cup 220, and a hook portion 2321 may protrude from the clamping sub-member 232. The hook portion 2321 can extend into the card slot 240 and be clamped to the edge of the card slot 240. Figure 7 It shows that the hook portion 2321 is clamped to the edge of the card slot 240. Specifically, the hook portion 2321 can be clamped to the edge of the card slot 240 close to the fixed cup 210. Optionally, the card slot 240 is formed on the outer periphery of the open end along the circumferential direction of the disposable cup 220, and the card slot 240 can be arranged in a ring shape. In this way, when assembling the fixed cup 210 and the disposable cup 220, it is not necessary to align the hook portion 2321 and the card slot 240, and "blind installation" can be achieved, improving the assembly efficiency.

[0070] Specifically, the support sub-member 231 may be arranged in a cylindrical shape. For example, the support sub-member 231 may be configured as a flat cylindrical structure. A part of one end of the support sub-member 231 may be fixedly connected to the fixed cup 210, and the other part may extend beyond the fixed cup 210 for connecting the edge of the disposable cup 220. Specifically, one end of the fixed cup 210 may be used to connect to the housing 110, a part of one end of the support sub-member 231 may be fixedly connected to the other end of the fixed cup 210, and the other part extends beyond the edge of the other end of the fixed cup 210. When the fixed cup 210 and the disposable cup 220 are connected, the other part of one end of the support sub-member 231 may cross the connection portion of the fixed cup 210 and the disposable cup 220.

[0071] The clamping sub-member 232 may be rotatably connected inside the support sub-member 231 and be exposed through the other end of the support sub-member 231. The clamping sub-member 232 is exposed through the other end of the support sub-member 231 so that it can be operated, such as pressed, to achieve rotation. The hook portion 2321 may be arranged at the end of the clamping sub-member 232 away from the fixed cup 210. In other words, the hook portion 2321 may be arranged at the end of the clamping sub-member 232 extending beyond the edge of the fixed cup 210, so that it can extend into the card slot 240 when the fixed cup 210 and the disposable cup 220 are connected.

[0072] Specifically, as Figure 8 shown, rotating parts 2322 can be provided on the opposite side walls of the snap - in sub - part 232. The rotating parts 2322 are, for example, rotating shafts or pin shafts, etc. Support holes 2311 are formed on the opposite side walls of the support sub - part 231. The rotating parts 2322 are rotatably inserted into the support holes 2311. As Figure 9 shown, one end of the snap - in sub - part 232 away from the hook part 2321 can be wedge - shaped, and its thickness gradually decreases in the direction away from the hook part 2321, so that the snap - in sub - part 232 can rotate relative to the support sub - part 231 by pressing one end of the snap - in sub - part 232 away from the hook part 2321. The thickness of the snap - in sub - part 232 can refer to the thickness of the snap - in sub - part 232 in the direction from one end of the support sub - part 231 to the other end of the support sub - part 231. Specifically, the rotating part 2322 is located between the wedge - shaped part and the hook part 2321, and can form a similar lever structure.

[0073] By setting the rotational fit between the rotating part 2322 and the support hole 2311, combined with the wedge - shaped setting of one end of the snap - in sub - part 232 away from the hook part 2321, the distance between one end of the snap - in sub - part 232 away from the hook part 2321 and the outer peripheral surface of the fixed cup 210 can gradually increase, thus allowing it to be pressed. When the snap - in sub - part 232 is pressed, one end of the snap - in sub - part 232 away from the hook part 2321 can gradually approach the outer peripheral surface of the fixed cup 210. Due to the lever principle, the hook part 2321 will be "lifted", and thus the release can be achieved. In this way, the pressing rotation of the snap - in sub - part 232 can be effectively realized, and the structure is simple and reliable.

[0074] Optionally, the number of the snap - fasteners 230 is at least two, and at least two snap - fasteners 230 are spaced apart and arranged on the fixed cup 210. At least two snap - fasteners 230 can be snap - connected to the same card slot 240. Of course, at least two snap - fasteners 230 can also be snap - connected to different card slots 240.

[0075] The second case: The support sub - part 231 is fixedly connected to the disposable cup 220, and the snap - in sub - part 232 is used to snap - connect to the fixed cup 210, so as to be able to achieve snapping or releasing through rotation relative to the support sub - part 231. Optionally, the number of the snap - fasteners 230 is at least two, and at least two snap - fasteners 230 are spaced apart and arranged on the outer periphery of the disposable cup 220.

[0076] For the specific structure of the second case, reference can be made to the description of the first case. The difference between the first case and the second case is only: the connection position of the support sub - part 231 and the corresponding change of the snap - in sub - part 232.

[0077] In this embodiment, the hardness of the disposable cup body 220 can be less than that of the fixed cup body 210. The disposable cup body 220 is a disposable consumable. For example, its material can include one or more of polyester (PET), polyethylene (PE), polyvinyl chloride (PVC), and polypropylene (PP). Further, the disposable cup body 220 can be formed by processes such as blow molding, extrusion blow molding, or injection molding, with low manufacturing costs and mature processes. The fixed cup body 210 can use more durable materials, such as ceramic materials, ABS (acrylonitrile / butadiene / styrene copolymer), or PC (polycarbonate) materials, and its hardness can be higher than that of the disposable cup body 220, thereby ensuring its own structural strength and durability.

[0078] When the dust collection device 1 is working, the garbage objects can enter the dust cup 20 along with the airflow. Specifically, as Figure 10 shown, the fixed cup body 210 can be provided with a dust inlet 260 communicating with its interior. The extending direction of the dust inlet 260 from the outside to the inside of the fixed cup body 210 is inclined with respect to the radial direction passing through the center of the dust inlet 260 outside the fixed cup body 210 (i.e., the center of the orifice of the dust inlet 260 outside the fixed cup body 210), which can support tangential air intake so that after the airflow enters the dust cup 20, an effect similar to a "whirlwind" can be formed. With the centrifugal action of the centrifugal separation component 120a, the garbage objects can be separated more effectively. The center of the orifice of the dust inlet 260 can be the center of a circle, the geometric center, or the geometric centroid, etc.

[0079] The dust collection device to which the dust cup embodiment of the present application is applied is not limited to the dust collection device 1 described in the dust collection device embodiment of the present application above, and can also be an existing dust collection device.

[0080] As Figure 2 shown, the dust inlet 260 can be communicated with the intake pipe 118. The intake pipe 118 can be used to be close to the area to be cleaned, and thus can adsorb the garbage objects. The intake pipe 118 can be connected to a brush head, so that a cleaning process of sweeping and adsorbing at the same time can be realized. As Figure 11 shown, the intake pipe 118 can also be connected to a floor brush assembly 30, etc., so that a cleaning process of adsorbing and mopping the floor at the same time can be realized.

[0081] Specifically, as Figure 11 shown, the dust collection device 1 can include a floor brush assembly 30 and a bracket assembly 40. The floor brush assembly 30 and the bracket assembly 40 are connected. The floor brush assembly 30 can be used to connect the intake pipe 118. The floor brush assembly 30 can perform a dragging and brushing cleaning on the area to be cleaned through the bracket assembly 40, and can realize the cleaning process of mopping the floor and adsorbing at the same time.

[0082] The floor brush assembly 30 may include a connecting pipe 310 and a floor brush 320. The floor brush 320 may be connected to one end of the connecting pipe 310. Specifically, the floor brush 320 may be hinged to the connecting pipe 310. The other end of the connecting pipe 310 may be connected to the intake pipe 118. The connecting pipe 310 may communicate with the intake pipe 118 to facilitate the adsorption of garbage objects. One end of the connecting pipe 310 may communicate with the outside through the floor brush 320, and thus may adsorb the garbage objects in the area to be cleaned. The bracket assembly 40 may be connected to the floor brush 320 and may be used to contact the area to be worked on, thereby achieving a mopping effect.

[0083] For the content of the above bracket assembly 40, reference may be made to the detailed description of the bracket assembly embodiment of the present application below.

[0084] As Figure 11 shown, the bracket assembly 40 described in the bracket assembly embodiment of the present application may include a disposable bracket 41 and a disposable wiping member 42. The disposable bracket 41 is used to detachably connect to the floor brush assembly 30, specifically, it may be connected to the floor brush 320 in the floor brush assembly 30. The disposable bracket 41 is used to support or attach the disposable wiping member 42. The disposable wiping member 42 may be disposed on the disposable bracket 41. The disposable wiping member 42 is used to wipe the area to be cleaned when the floor brush assembly 30 cleans the area to be cleaned, and can be discarded together with the disposable bracket 41 after use, or the disposable wiping member 42 can be removed separately. At the same time, the connecting pipe 310 may adsorb the area to be cleaned through the floor brush 320 and the disposable bracket 41.

[0085] By detachably connecting the floor brush assembly 30 through the disposable bracket 41 and using the disposable wiping member 42 to wipe the area to be cleaned, mopping can be carried out while sweeping and vacuuming, thereby achieving "one - body sweeping and mopping", making the functions of the vacuuming device 1 more diverse. If the structure such as a water tank and a water pump is set up to cooperate with a mop to achieve mopping, it will cause the structure of the vacuuming device 1 to be more complex, become bulky, and the mop needs to be cleaned frequently, which does not significantly improve the efficiency compared to manual mopping. This embodiment adopts a more ingenious technical means. Utilizing the disposable characteristics of the disposable wiping member 42 and the disposable bracket 41, they can be removed together after use, or the disposable wiping member 42 can be removed separately, achieving disposable use and discarding, without the need for cleaning, which is fast and convenient, can effectively improve the cleaning efficiency, and can simplify the structure of the vacuuming device 1 without setting up structures such as a water pump and a water tank, making it more lightweight.

[0086] Optionally, as Figure 12As shown, one side of the disposable bracket 41 is used to detachably connect to the floor brush assembly 30. The disposable wiping member 42 can be disposed on the other side of the disposable bracket 41 opposite thereto. The disposable bracket 41 can be formed with an air inlet 416 for communicating with the floor brush assembly 30. The disposable wiping member 42 is spaced from the air inlet 416. Specifically, the air inlet 416 can communicate with the connecting pipe 310.

[0087] Optionally, the number of the air inlets 416 is at least two, which are spaced and opened on the other side of the disposable bracket 41. Correspondingly, the number of the accommodating cavities 4180 can also be at least two, and the number of the air outlets 417 can also be at least two. In this way, the adsorption area can be increased and the adsorption effect can be improved.

[0088] Specifically, as Figure 13 and Figure 14 shown, the disposable bracket 41 can include a bracket bottom wall 411 and a bracket side wall 412. The air inlet 416 can be opened on the bracket bottom wall 411.

[0089] The bracket bottom wall 411 and the bracket side wall 412 can be connected to each other to enclose an installation groove 410 on one side of the disposable bracket 41. Specifically, the bracket side wall 412 can be connected to the periphery of the bracket bottom wall 411 and extend toward one side of the bracket bottom wall 411, thereby enclosing the installation groove 410. The other side of the bracket bottom wall 411 can be used to install the disposable wiping member 42.

[0090] The installation groove 410 can be used to accommodate the floor brush assembly 30, such as the floor brush 320 in the floor brush assembly 30. A stop block 413 can be protrudingly provided on the bracket bottom wall 411 within the installation groove 410. The stop block 413 and the bracket side wall 412 can define an installation area 414, so that the floor brush assembly 30 is connected within the installation area 414 and is restricted from moving in a direction parallel to the bracket side wall 412.

[0091] Specifically, the stop block 413 and a part of the bracket side wall 412 can define an installation area 414, and the floor brush 320 can be placed within the installation area 414. Due to the functions of the stop block 413 and the bracket side wall 412, the movement of the floor brush 320 in a direction parallel to the bracket side wall 412 can be restricted, thereby making the connection between the floor brush assembly 30 and the disposable bracket 41 relatively stable and reducing the situation that the disposable bracket 41 falls off from the floor brush assembly 30 during the cleaning process.

[0092] Optionally, the number of the stop blocks 413 is at least two, and the at least two stop blocks 413 can be arranged side by side and spaced apart.

[0093] Further, a clamping block 415 protrudes from the side wall 412 of the bracket for defining the installation area 414. In other words, a part of the side wall of the bracket side wall 412 for defining the installation area 414 protrudes with a clamping block 415. The clamping block 415 and the bottom wall 411 of the bracket may be arranged at intervals. The floor brush assembly 30 may be located between the clamping block 415 and the bottom wall 411 of the bracket to be restricted from moving in a direction perpendicular to the bottom wall 411 of the bracket. Specifically, when the floor brush 320 is connected to the installation area 414, it is located between the clamping block 415 and the bottom wall 411 of the bracket, so that its movement in the direction perpendicular to the bottom wall 411 of the bracket will also be restricted, further improving the connection stability and reliability between the floor brush assembly 30 and the disposable bracket 41.

[0094] Optionally, the number of the clamping blocks 415 is at least two, and the at least two clamping blocks 415 may be arranged side by side at intervals. Optionally, the arrangement direction of the at least two clamping blocks 415 is the same as the arrangement direction of the at least two stoppers 413. Here, the same may be exactly the same or approximately the same.

[0095] Through the cooperation of the stopper 413, the clamping block 415 and the corresponding structures, the connection between the floor brush assembly 30 and the disposable bracket 41 can be made more stable and reliable. When using the vacuum device 1 on the area to be cleaned, the disposable bracket 41 can move together with the disposable wiping member 42 to wipe the area to be cleaned.

[0096] In Figure 13 and Figure 14 As shown, the air inlet 416 directly penetrates through the bottom wall 411 of the bracket, and then can be directly communicated with the connecting pipe 310 after being connected to the floor brush 320. On this basis, this embodiment can be further improved:

[0097] As Figure 15 shown, when the vacuum device 1 is performing the adsorption work, the disposable bracket 41 can be used to initially filter the air flow, so that the filtered garbage can be retained in the disposable bracket 41. When the disposable bracket 41 is removed, it can be discarded together with the filtered garbage. Specifically, the disposable bracket 41 may form a receiving cavity 4180 and an air outlet 417 communicating with the receiving cavity 4180. Specifically, the disposable bracket 41 may protrude to form an arched portion 418 on one side thereof, and the above-mentioned receiving cavity 4180 may be opened in the arched portion 418. The air outlet 417 may be used to communicate with the floor brush assembly 30, and specifically may communicate with the connecting pipe 310. A filter element 419 may be provided at the air outlet 417, and the air inlet 416 communicates with the receiving cavity 4180, so as to be able to communicate with the floor brush assembly 30 through the receiving cavity 4180 and the air outlet 417.

[0098] The garbage objects enter the accommodation cavity 4180 along with the air flow. After being intercepted by the filter element 419, they fall into the accommodation cavity 4180. The air flow enters the connecting pipe 310 through the air outlet 417 and then enters the dust cup 20 for further filtration. In this way, the filtration of the air flow can be achieved through the disposable bracket 41, and the garbage objects can be removed along with the disposable bracket 41, which is convenient for cleaning and can also reduce the frequency of cleaning the dust cup 20.

[0099] In this embodiment, the disposable wiping member 42 can be connected to the disposable bracket 41 through an adhesive member (not shown in the figure). Specifically, the disposable wiping member 42 can be connected to the other side of the bottom wall 411 of the bracket, that is, the side of the bottom wall 411 facing away from the side wall 412 of the bracket. Optionally, the adhesive member can be a sticker, double-sided tape or glue layer. The sticker is, for example, a magic sticker, etc. The glue layer is, for example, formed after applying glue or solid glue and curing.

[0100] Optionally, the disposable bracket 41 is a disposable consumable. For example, its material can include one or more of polyester (PET), polyethylene (PE), polyvinyl chloride (PVC) and polypropylene (PP). Optionally, the disposable wiping member 42 is also a disposable consumable, which can be a wet wipe or a wet rag, etc. Optionally, the disposable wiping member 42 can have a cleaning and sterilizing function, and can be configured (for example, pre-impregnated) with components for consumer sterilization, such as ethanol, isopropanol, quaternary ammonium salt, hydrogen peroxide, etc.

[0101] By providing the disposable bracket 41 and the disposable wiping member 42, when the vacuum cleaner 1 cleans the area to be cleaned, it can effectively wipe the area to be cleaned and can be discarded along with the disposable bracket 41 after use. In this way, the cleaning efficiency can be improved, and there is no need to disassemble and clean the rag. Instead, the disposable wiping member 42 and the disposable bracket 41 can be directly discarded after use, which is quick and convenient.

[0102] The vacuum cleaner to which the bracket assembly embodiment of the present application is applied is not limited to the vacuum cleaner 1 described in the vacuum cleaner embodiment of the present application above, and can also be a vacuum cleaner in the prior art.

[0103] The above are only embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A dust collecting device, characterized in that: include: case; a centrifugal separation assembly, at least partially disposed in the housing, the centrifugal separation assembly comprising a driving member, an impeller and a separation member, wherein an output shaft of the driving member is rotatably connected to the impeller and the separation member, respectively, so as to drive the impeller and the separation member to rotate, and the impeller is used to form an airflow flowing from the outside of the separation member into the separation member by rotating; The separator comprises a top wall, a side wall and a bottom wall, wherein the side wall is connected between the top wall and the bottom wall to enclose a filter cavity, and at least the side wall is provided with a filter hole communicating with the filter cavity; The side wall is arranged in a cylindrical shape, the axis of the filter hole and the axis of the side wall do not intersect, and the angle between the direction of the axis of the filter hole from the outside of the filter cavity to the inside of the filter cavity and the tangent direction of the tangent line corresponding to the side wall and the filter hole is an acute angle, the tangent direction of the tangent line is related to the rotation direction of the side wall, and the tangent direction points to the rotation direction; The dust suction device comprises a dust cup, and the shell is connected to the dust cup.

2. The dust collecting device according to claim 1, characterized in that: The separation element and the impeller are located on the same side or different sides of the driving element.

3. The dust collecting device according to claim 2, characterized in that: The centrifugal separation assembly includes a gearbox, the output shaft of the driving member is connected to the impeller on one side of the driving member, the output shaft of the driving member is connected to the input shaft of the gearbox on the other side of the driving member, and the output shaft of the gearbox is connected to the separation member.

4. The dust collecting device according to claim 3, characterized in that: The centrifugal separation assembly includes a motor housing and a fan housing, the fan housing is connected to one end of the motor housing, and the interior of the fan housing is communicated with the interior of the motor housing, the impeller is arranged inside the fan housing, the driving member and the gearbox are arranged inside the motor housing, and the separation member is arranged at the other end of the motor housing.

5. The dust collecting device according to claim 4, characterized in that: The top wall is butted against the other end of the motor housing, the filter cavity is communicated with the interior of the motor housing through the top wall, and the output shaft of the gearbox is connected to the top wall.

6. The dust collecting device according to claim 1, characterized in that: The side wall is provided with a group of filter holes along its circumference, and the side wall is provided with a plurality of groups of filter holes at intervals along its axial direction, and the number of filter holes in each group is at least one.

7. The dust collecting device according to any one of claims 5 to 6, characterized in that: The side wall is further arranged in a conical shape, and its diameter gradually decreases in the direction from the top wall to the bottom wall, and the output shaft of the gearbox of the centrifugal separation assembly is passed through the top wall and further connected to the bottom wall; and / or, The dust suction device includes a wear-resistant sealing pad, which is connected to the motor housing of the centrifugal separation component and abuts the side wall or the top wall. The top wall is provided with a flow hole connected to the filter cavity. The filter cavity is connected to the interior of the motor housing through the flow hole, and the wear-resistant sealing pad surrounds the flow hole.

8. The dust collecting device according to claim 2, characterized in that: The shell is provided with a receiving cavity, the driving member and the impeller are arranged in the receiving cavity, and the separating member at least partially extends into the dust cup.

9. The dust collecting device according to claim 8, characterized in that: The dust cup includes a fixed cup body and a disposable cup body. The disposable cup body is detachably connected to the fixed cup body and communicates with the fixed cup body to accommodate garbage objects, so that the disposable cup body can be removed together with the garbage objects after use or can be removed separately.

10. The dust collecting device according to claim 2, characterized in that: The shell is provided with a receiving cavity and a battery compartment for receiving batteries, the battery compartment surrounds the receiving cavity and is spaced apart from the receiving cavity, the receiving cavity is connected to the battery compartment so that the airflow can flow into the battery compartment and be discharged through the battery compartment.

11. A centrifugal separation assembly, characterized in that: include: A driving member, an impeller and a separating member, wherein an output shaft of the driving member is connected to the impeller and the separating member respectively to drive the impeller and the separating member to rotate, and the impeller is used to form an airflow from outside the separating member to inside the separating member by rotating; The separator comprises a top wall, a side wall and a bottom wall, wherein the side wall is connected between the top wall and the bottom wall to enclose a filter cavity, and at least the side wall is provided with a filter hole communicating with the filter cavity; The side wall is arranged in a cylindrical shape, the axis of the filter hole and the axis of the side wall do not intersect, and the angle between the direction of the axis of the filter hole from outside the filter cavity to inside the filter cavity and the tangent of the tangent corresponding to the side wall and the filter hole is an acute angle, the tangent of the tangent is related to the rotation direction of the side wall, and the tangent points to the rotation direction.

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