Cleaning device and cleaning equipment

Abstract

The invention provides a cleaning device and cleaning equipment, and relates to the technical field of cleaning products. The cleaning device comprises a base, a dust collection pipeline and an air blowing pipeline. The dust collection pipeline and the air blowing pipeline are both arranged on the base. The base is provided with an air suction opening and a dust raising cavity, and the air suction opening and the dust raising cavity face the lower portion of the base; the cavity wall of the dust raising cavity is provided with an air blowing opening, the air blowing pipeline is communicated with the air blowing opening, the bottom of the base is provided with a dust blocking plate, the dust blocking plate is located between the air suction opening and the air blowing opening, and the side, facing the air blowing opening, of the dust blocking plate forms part of the cavity wall of the dust raising cavity; an opening is formed in the dust blocking plate and communicates with the air suction opening and the dust raising cavity, so that stubborn dust attached to the ground or the deep layer of the blanket can be blown up, the dust is sucked into the dust suction channel more easily, and the efficient and good cleaning effect is achieved.

Description

Technical Field

[0001] This application relates to the technical field of cleaning products, and particularly to a cleaning device and a cleaning equipment. Background Art

[0002] Cleaning equipment such as vacuum cleaners and floor washers are widely used for environmental cleaning in various indoor and outdoor scenarios. Different cleaning equipment can achieve various functions such as dust suction and mopping, so as to maintain the cleanliness of living and working environments.

[0003] In related technologies, a vacuum cleaner generally includes a suction head and an operation main body connected to the suction head. The suction head can be dragged on the ground, and a handle is provided at the top of the operation main body. The user holds and pushes and pulls the operation main body through the handle, thereby driving the suction head to move. Components such as a dust collection box and a blower are provided on the operation main body. The blower is used to generate negative pressure, so that a suction port on the suction head generates suction force to achieve the dust suction function.

[0004] However, current vacuum cleaners are difficult to clean stubborn dust attached to the ground or deep in the carpet, and the cleaning effect is poor. Summary of the Invention

[0005] This application provides a cleaning device and a cleaning equipment, which can blow up stubborn dust attached to the ground or deep in the carpet, have a dust-raising function, and thus it is easier to suck the dust into the equipment interior, improving the cleaning effect of the cleaning equipment.

[0006] In a first aspect, this application provides a cleaning device, which includes a base, a dust suction pipeline, and a blowing pipeline. The dust suction pipeline and the blowing pipeline are both arranged on the base; the base is provided with a suction port and a dust-raising cavity, and both the suction port and the dust-raising cavity face downward of the base; the dust suction pipeline is communicated with the suction port, a blowing port is provided on the cavity wall of the dust-raising cavity, and the blowing pipeline is communicated with the blowing port; the blowing port is located on the front side of the suction port along the cleaning direction of the cleaning device.

[0007] Wherein, a dust baffle is provided at the bottom of the base, the dust baffle is located between the suction port and the blowing port, and one side of the dust baffle facing the blowing port forms part of the cavity wall of the dust-raising cavity; an opening is provided on the dust baffle, and the opening communicates the suction port and the dust-raising cavity.

[0008] The cleaning device provided by this application realizes the functions of dust suction and dust raising by setting a dust suction pipeline and a blowing pipeline respectively. The airflow of the blowing pipeline blows out from the blowing port, so that stubborn dust attached to the ground or deep in the carpet can be blown up, the dust on the surface to be cleaned is raised in the dust-raising cavity, and the suction port can suck the raised dust into the dust suction pipeline through the opening of the dust baffle, while the dust baffle can prevent the raised dust from overflowing the dust-raising cavity, thereby maintaining a high and good cleaning effect.

[0009] As an alternative embodiment, the suction opening extends along a first direction, and the extending direction of the dust-raising cavity is parallel to the suction opening; wherein, the first direction is perpendicular to the cleaning direction of the cleaning device.

[0010] With such an arrangement, during the cleaning process of the cleaning device moving for cleaning, the dust-raising cavity can have a relatively large coverage area, and the corresponding suction opening can efficiently suck the raised dust into the dust suction pipeline.

[0011] As an alternative embodiment, the length of the suction opening is greater than or equal to the length of the dust-raising cavity, and the projection of the suction opening in the cleaning direction of the cleaning device covers the dust-raising cavity.

[0012] With such an arrangement, it is possible to prevent the dust-laden air from overflowing from both ends of the dust-raising cavity.

[0013] As an alternative embodiment, the dust suction pipeline and the blowing pipeline are arranged along the height direction of the base, and the blowing pipeline is located above the dust suction pipeline.

[0014] With such an arrangement, the longitudinal space of the cleaning device is fully utilized, and the structural compactness of the cleaning device can be improved.

[0015] As an alternative embodiment, the base has a dust suction cavity and a blowing cavity, the dust suction pipeline is communicated with the dust suction cavity, and the blowing pipeline is communicated with the blowing cavity.

[0016] Wherein, the dust suction cavity and the blowing cavity are arranged in layers along the height direction of the base, and the end of the dust suction cavity facing the lower part of the base forms the suction opening; the blowing cavity extends from above the dust suction cavity to the front end of the dust suction cavity along the cleaning direction of the cleaning device and is communicated with the dust-raising cavity through the blowing opening.

[0017] With such an arrangement, during the cleaning process, the suction opening can pass through the area where the dust is raised by the blowing opening, ensuring that the raised dust is sucked into the dust suction air duct.

[0018] As an alternative embodiment, there can be multiple blowing openings, and the multiple blowing openings are arranged at intervals along the length direction of the dust-raising cavity, and the air outlet direction of at least one of the multiple blowing openings is inclined towards the suction opening relative to the vertical direction.

[0019] With such an arrangement, the dust-laden air in the dust-raising cavity can quickly pass through the opening and pass through the dust baffle into the suction opening.

[0020] As an alternative embodiment, the cavity wall of the dust-raising cavity is arc-shaped, and the suction opening is located at the top of the dust-raising cavity.

[0021] With such an arrangement, the smoothness of the air flow can be improved, the wind resistance can be reduced, and the dust in the dust-laden air can be prevented from falling.

[0022] As an alternative implementation, there can be multiple openings. The multiple openings are spaced apart along the length direction of the dust shield. The multiple openings form multiple dust guiding channels between the air suction port and the dust raising cavity.

[0023] With such a setting, the efficiency of the air suction port sucking the dusty air into the dust raising cavity can be improved.

[0024] As an alternative implementation, the first end of the dust shield is rotatably connected to the base, and the second end of the dust shield faces downward of the base; the cleaning device is configured to adjust the relative sizes of the air suction port and the dust raising cavity through the rotation of the dust shield.

[0025] With such a setting, the rotation of the dust shield can guide the flow of the dusty air, enabling the dusty air to flow into the air suction port faster and more smoothly.

[0026] In a second aspect, the present application provides a cleaning device. The cleaning device includes a device main body and a cleaning device. The device main body is movably connected to the cleaning device. A dust collection cavity and a fan assembly are provided on the device main body. The dust collection cavity is communicated with a dust suction pipe. The fan assembly includes a first fan unit. The air inlet side of the first fan unit is communicated with the dust collection cavity. The air outlet side of the first fan unit is communicated with a blowing pipe. Alternatively, the fan assembly further includes a second fan unit, and the air outlet side of the second fan unit is communicated with the blowing pipe.

[0027] The present application provides a cleaning device and a cleaning equipment. The cleaning device includes a base, a dust suction pipe, and a blowing pipe. The dust suction pipe and the blowing pipe are both arranged on the base; the base is provided with an air suction port and a dust raising cavity, and both the air suction port and the dust raising cavity face downward of the base; the dust suction pipe is communicated with the air suction port, and a blowing port is provided on the cavity wall of the dust raising cavity. The blowing pipe is communicated with the blowing port. A dust shield is provided at the bottom of the base. The dust shield is located between the air suction port and the blowing port. The side of the dust shield facing the blowing port forms a part of the cavity wall of the dust raising cavity; an opening is provided on the dust shield, and the opening communicates the air suction port and the dust raising cavity, so that stubborn dust attached to the ground or deep in the carpet can be blown up, the dust on the surface to be cleaned can be raised in the dust raising cavity, the air suction port can suck the raised dust into the dust suction pipe through the opening of the dust shield, and the dust shield can prevent the raised dust from overflowing the dust raising cavity, thereby maintaining an efficient and good cleaning effect.

[0028] In addition to the technical problems solved by the embodiments of the present application described above, the technical features constituting the technical solutions, and the beneficial effects brought by these technical features of the technical solutions, the other technical problems that the cleaning device and the cleaning equipment provided by the present application can solve, the other technical features included in the technical solutions, and the beneficial effects brought by these technical features will be further described in detail in the specific implementation manner. Description of the Drawings

[0029] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0030] Figure 1 Structural schematic diagram of the cleaning device provided by the embodiment of the present application;

[0031] Figure 2 Bottom schematic diagram of the cleaning device provided by the embodiment of the present application;

[0032] Figure 3 Partition schematic diagram of the air outlet of the cleaning device provided by the embodiment of the present application;

[0033] Figure 4 Orientation schematic of the air outlet of the cleaning device provided by the embodiment of the present application Figure 1 ;

[0034] Figure 5 Orientation schematic of the air outlet of the cleaning device provided by the embodiment of the present application Figure 2 ;

[0035] Figure 6 Structural schematic of the cleaning equipment provided by the embodiment of the present application Figure 1 ;

[0036] Figure 7 Structural schematic of the cleaning equipment provided by the embodiment of the present application Figure 2 ;

[0037] Figure 8 Internal structural schematic diagram of the dust collection housing of the cleaning equipment provided by the embodiment of the present application;

[0038] Figure 9 Exploded view of the dust collection housing and related components of the cleaning equipment provided by the embodiment of the present application;

[0039] Figure 10 Air outlet schematic of the fan assembly in the cleaning equipment provided by the embodiment of the present application.

[0040] Explanation of reference numerals:

[0041] 100 - Device main body; 111a - Dust collection chamber; 111b - Exhaust air chamber; 112 - Dust collection housing; 1121 - Air outlet; 113 - Air inlet pipe; 1131 - Air inlet; 1132 - Cyclone outlet; 1133 - Turbulence part; 114 - Flow guiding assembly; 1141 - Flow guiding vane; 1142 - Flow guiding member; 1143 - Flow guiding bracket; 1144 - Flow guiding ball; 1145 - Filter; 115 - Dust collection bin cover; 120 - Fan assembly; 121 - Fan housing; 1211 - First exhaust air port; 1212 - Second exhaust air port; 122 - First fan unit; 123 - Switching unit; 130 - Battery assembly; 140 - Exhaust pipe

[0042] 200 - Cleaning device; 201 - Suction port; 202 - Blowing port; 202a - Blowing area; 203 - Suction chamber; 204 - Blowing chamber; 205 - Dust guiding flow channel; 206 - Dust raising chamber; 210 - Base; 220 - Suction pipeline; 230 - Blowing pipeline; 240 - Dust baffle; 241 - Opening Detailed implementation manners

[0043] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations

[0044] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application

[0045] The terms "first", "second", "third" (if any) in the description, claims and drawings of this application are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of this application described here can be implemented in an order other than those illustrated or described here

[0046] In addition, the terms "comprising", "having", and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or maintenance tool that comprises a series of steps or units need not be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these process, method, product, or maintenance tool.

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0048] A vacuum cleaner generally includes a suction head and an operation main body connected to the suction head. The suction head can be dragged on the ground. A handle is provided at the top of the operation main body. The user holds and pushes and pulls the operation main body through the handle, thereby driving the suction head to move. Components such as a dust collection box and a blower are provided on the operation main body. The blower is used to generate negative pressure, so that a suction port on the suction head generates suction force to achieve the dust suction function.

[0049] However, currently, on the suction head of a vacuum cleaner, the coverage area of the suction port is limited. During the cleaning process, dust is likely to accumulate in some corners and edges. Due to the shape and structure of the suction head of the vacuum cleaner, the suction port cannot cover positions such as the corners of the room and the feet of tables and chairs, resulting in difficult cleaning of these edge positions and poor cleaning effect.

[0050] To solve the above technical problems, the embodiments of the present application provide a cleaning device and a cleaning equipment. The cleaning device is used for the cleaning equipment. A dust suction pipe and a blowing pipe are respectively used on the cleaning device to achieve the functions of dust suction and dust raising. The airflow of the dust raising pipe blows out from the blowing port, which can blow up stubborn dust attached to the ground or deep in the carpet, raise the dust on the surface to be cleaned in the dust raising cavity. The suction port can suck the raised dust into the dust suction pipe through the opening of the dust blocking plate, and the dust blocking plate can prevent the raised dust from overflowing the dust raising cavity, thereby maintaining a high-efficiency and good cleaning effect.

[0051] For the convenience of understanding, first, the application scenario of the cleaning equipment provided by the embodiments of the present application will be described.

[0052] The cleaning equipment provided by the embodiments of the present application has a dust suction function, including but not limited to vacuum cleaners, floor washing machines, suction and mopping integrated machines, etc. The cleaning equipment can be applied to household cleaning, and can also be applied to floor cleaning in other indoor or outdoor scenarios, etc. The embodiments of the present application do not limit the specific product type to which the equipment main body is applied, nor the specific application scenario of the cleaning equipment.

[0053] Figure 1 It is a schematic structural diagram of the cleaning device provided by the embodiment of the present application; Figure 2 It is a bottom view of the cleaning device provided by the embodiment of the present application.

[0054] See Figure 1 and Figure 2 As shown in and, the present application provides a cleaning device 200, which includes a base 210, a dust suction pipe 220 and a blowing pipe 230. The dust suction pipe 220 and the blowing pipe 230 are both arranged on the base 210. The base 210 is provided with a suction port 201 and a dust raising cavity 206, and both the suction port 201 and the dust raising cavity 206 face downward of the base 210. Among them, the dust suction pipe 220 is communicated with the suction port 201, the cavity wall of the dust raising cavity 206 is provided with a blowing port 202, and the blowing pipe 230 is communicated with the blowing port 202.

[0055] It can be understood that the dust suction pipe 220 can form a negative pressure, so that the suction port 201 generates suction force, thereby sucking dust and sundries on the surface to be cleaned into the dust suction pipe 220. The blowing pipe 230 can form a positive pressure, so that the blowing port 202 can blow out air flow towards the surface to be cleaned, thereby raising dust in the dust raising cavity 206, so that the suction port 201 has a higher dust suction efficiency.

[0056] In some embodiments, a dust baffle 240 is provided at the bottom of the base 210. The dust baffle 240 is located between the suction port 201 and the blowing port 202. The side of the dust baffle 240 facing the blowing port 202 forms a part of the cavity wall of the dust raising cavity 206. An opening 241 is provided on the dust baffle 240, and the opening 241 communicates the suction port 201 and the dust raising cavity 206.

[0057] Among them, the dust baffle 240 is between the suction port 201 and the dust raising cavity 206, isolating the dust raising cavity 206, so that the air flow blown out by the blowing port 202 can form an impact force to quickly raise the dust, and the opening 241 provided on the dust baffle 240 can enable the suction port 201 and the dust raising cavity 206 to form a channel for air flow to circulate, and the formed negative pressure can suck the dust in the dust raising cavity 206 into the suction pipe through the opening 241.

[0058] It should be noted that in the cleaning device 200 provided in the embodiments of the present application, the dust suction pipe 220 and the blowing pipe 230 are respectively used to realize the functions of dust suction and dust raising. The air flow of the blowing pipe 230 blows out from the air blowing port 202, which can blow up the stubborn dust attached to the ground or deep in the carpet, raise the dust on the surface to be cleaned in the dust raising cavity 206, and the suction port 201 can suck the raised dust into the dust suction pipe 220 through the opening 241 of the dust baffle 240, while the dust baffle 240 can prevent the raised dust from overflowing the dust raising cavity 206, thereby maintaining an efficient and good cleaning effect.

[0059] First, the structures of the suction port 201 and the dust raising cavity 206 will be described in detail below.

[0060] Please continue to refer to Figure 1 and Figure 2 , in a possible implementation manner, the suction port 201 extends in the first direction, and the extending direction of the dust raising cavity 206 is parallel to that of the suction port 201. Wherein, the first direction is perpendicular to the cleaning direction of the cleaning device 200. The air blowing port 202 is located on the front side of the suction port 201 along the cleaning direction of the cleaning device 200.

[0061] Define the first direction as the X direction and the cleaning direction of the cleaning device 200 as the Y direction.

[0062] It can be understood that the suction port 201 can have a strip-shaped structure and can extend along the width direction of the cleaning device 200, where the width direction of the cleaning device 200 is perpendicular to the moving direction during cleaning of the cleaning device 200. During the moving cleaning process of the cleaning device 200, the dust raising cavity 206 can have a large coverage area, and the corresponding suction port 201 can efficiently suck the raised dust into the dust suction pipe 220.

[0063] In some embodiments, the length of the suction port 201 is greater than or equal to the length of the dust raising cavity 206, and the projection of the suction port 201 in the cleaning direction of the cleaning device 200 covers the dust raising cavity 206, so as to prevent the dust and air from overflowing from both ends of the dust raising cavity 206.

[0064] Exemplarily, the air blowing port 202 can be located in front of the suction port 201 along the cleaning direction of the cleaning device 200. During the cleaning process, the suction port 201 can pass through the area where the air blowing port 202 raises dust, ensuring that the raised dust is sucked into the dust suction air duct.

[0065] Figure 3 It is a schematic diagram of the partition of the air blowing port in the cleaning device provided in the embodiments of the present application.

[0066] Exemplarily, please refer to Figure 3, the air outlet 202 has a plurality of air blowing areas 202a, and the plurality of air blowing areas 202a are respectively located at different positions on the circumferential side of the air suction port 201, so as to expand the cleaning range of the cleaning device 200 and make it easier to clean the corner positions of the scene to be cleaned.

[0067] Please continue to refer to Figure 1 and Figure 2 , as an alternative embodiment, the dust suction duct 220 and the air blowing duct 230 are arranged along the height direction of the base 210, and the air blowing duct 230 is located above the dust suction duct 220. In this way, the longitudinal space of the cleaning device 200 can be fully utilized, and the structural compactness of the cleaning device 200 can be improved.

[0068] Exemplarily, the base 210 has a dust suction cavity 203 and an air blowing cavity 204. The dust suction duct 220 is communicated with the dust suction cavity 203, and the air blowing duct 230 is communicated with the air blowing cavity 204. Among them, the dust suction cavity 203 and the air blowing cavity 204 are arranged in layers along the height direction of the base 210, and one end of the dust suction cavity 203 facing the lower part of the base 210 forms the air suction port 201.

[0069] It should be noted that the air blowing cavity 204 can extend from above the dust suction cavity 203 to the front end of the dust suction cavity 203 along the cleaning direction of the cleaning device 200, and is communicated with the dust-raising cavity 206 through the air outlet 202. During the cleaning process, the air suction port 201 can pass through the area where the dust is raised by the air outlet 202 to ensure that the raised dust is sucked into the dust suction air duct.

[0070] Figure 4 Schematic diagram of the orientation of the air outlet in the cleaning device provided by the embodiment of the present application Figure 1 ; Figure 5 Schematic diagram of the orientation of the air outlet in the cleaning device provided by the embodiment of the present application Figure 2 .

[0071] Please refer to Figure 4 and Figure 5 , and in combination with Figure 1 and Figure 2 , in some embodiments, there can be a plurality of air outlets 202, and the plurality of air outlets 202 are arranged at intervals along the length direction of the dust-raising cavity 206. The air outlet direction of at least one of the plurality of air outlets 202 is inclined relative to the vertical direction towards the air suction port 201, so that the dust-laden gas in the dust-raising cavity 206 can quickly pass through the opening 241 through the dust baffle 240 and enter the air suction port 201.

[0072] Exemplarily, the inclination angle of the air outlet direction of the air outlet 202 relative to the vertical direction can include but is not limited to 1°, 10°, 20°, 30°, 45°, 60°, etc., and the embodiment of the present application does not make specific limitations on this.

[0073] Exemplarily, the air outlet 202 can be a hole-like structure, so that the air flow blown out by the air outlet 202 has a higher flow rate. Thus, the air flow impacts the surface to be cleaned downward, and stubborn dust and debris can be cleaned up.

[0074] In some embodiments, the cavity wall of the dust-raising cavity 206 is arc-shaped, and the air inlet 201 is located at the top of the dust-raising cavity 206, so as to improve the smoothness of air flow, reduce wind resistance, and prevent the dust in the dust-laden air from falling.

[0075] Exemplarily, there can be a plurality of openings 241. The plurality of openings 241 are spaced apart along the length direction of the dust baffle 240. The plurality of openings 241 form a plurality of dust guiding channels 205 between the air inlet 201 and the dust-raising cavity 206, so as to improve the efficiency of the dust-laden air inhaled by the air inlet 201 into the dust-raising cavity 206.

[0076] As an alternative embodiment, the first end of the dust baffle 240 is rotatably connected to the base 210, and the second end of the dust baffle 240 faces downward of the base 210. The cleaning device 200 is configured to adjust the relative sizes of the air inlet 201 and the dust-raising cavity 206 by the rotation of the dust baffle 240. When the dust baffle 240 deflects into the dust-raising cavity 206, the area of the air inlet 201 can be increased and the area of the dust-raising cavity 206 can be reduced. When the dust baffle 240 deflects toward the air inlet 201, the area of the air inlet 201 can be reduced and the area of the dust-raising cavity 206 can be increased.

[0077] It can be understood that the rotation of the dust baffle 240 can guide the flow of the dust-laden air, so that the dust-laden air flows into the air inlet 201 faster and more smoothly. In addition, the deflection direction and angle of the dust baffle 240 can be adjusted according to the specific application scenario. For example, when cleaning a flat area and a non-corner area, or when there is relatively more dust on the ground, the dust baffle 240 can be deflected toward the dust-raising cavity 206 to reduce the volume of the dust-raising cavity 206 and increase the area of the air inlet 201, thereby improving the dust suction efficiency of the air inlet 201 and avoiding too much dust being raised and causing the dust-laden air to overflow.

[0078] Figure 6 Structural schematic of the cleaning device provided by the embodiment of the present application Figure 1 ; Figure 7 Structural schematic of the cleaning device provided by the embodiment of the present application Figure 2 ; Figure 8 Internal structural schematic diagram of the dust collection housing in the cleaning device provided by the embodiment of the present application; Figure 9 Exploded view of the dust collection housing and related components in the cleaning device provided by the embodiment of the present application, Figure 10 Air outlet schematic diagram of the fan assembly in the cleaning device provided by the embodiment of the present application.

[0079] Please refer to Figures 6 to 10, an embodiment of the present application provides a cleaning device. The cleaning device includes a device main body 100 and a cleaning device 200. The device main body 100 is movably connected to the cleaning device 200. A dust collection chamber 111a and a fan assembly 120 are provided on the device main body 100. The dust collection chamber 111a is communicated with a dust suction pipe 220. The fan assembly 120 includes a first fan unit 122, and the air inlet side of the first fan unit 122 is communicated with the dust collection chamber 111a.

[0080] Exemplarily, the air outlet side of the first fan unit 122 is communicated with a blowing pipe 230. A single fan unit is used to simultaneously realize the functions of negative pressure dust suction and positive pressure blowing to raise dust.

[0081] Exemplarily, the fan assembly 120 further includes a second fan unit (not shown), and the air outlet side of the second fan unit is communicated with the blowing pipe 230. The air outlet side of the first fan unit 122 is communicated with the external space, so that two fan units are used to respectively realize the functions of negative pressure dust suction and positive pressure blowing to raise dust.

[0082] Among them, the device main body 100 is used as the main structure of the cleaning device for the user to operate to drive the cleaning device 200 to move on the surface to be cleaned, and the cleaning device 200 can suck in dust and sundries on the surface to be cleaned.

[0083] The following takes the example that the device main body 100 simultaneously realizes the functions of negative pressure dust suction and positive pressure dust raising through a single fan unit for detailed description.

[0084] Please continue to refer to Figures 6 to 10 , in a possible implementation manner, the device main body 100 may include a dust collection housing 112. The fan assembly 120 is connected to the dust collection housing 112. The dust collection housing 112 encloses and forms a mutually isolated dust collection chamber 111a and an exhaust chamber 111b. The dust collection chamber 111a is communicated with a dust suction air duct, the air inlet side of the fan assembly 120 is communicated with the dust collection chamber 111a, the air outlet side of the fan assembly 120 is communicated with the exhaust chamber 111b, and the exhaust chamber 111b is communicated with a blowing air duct.

[0085] It can be understood that the dust collection chamber 111a and the exhaust chamber 111b are two independent spaces, and the self-structure of the dust collection housing 112 can be used to form a cavity channel for the air inlet and outlet of the fan assembly 120, thereby reducing the volume and weight of the device main body 100.

[0086] Exemplarily, the dust collection chamber 111a and the exhaust chamber 111b can be arranged side by side to ensure the smoothness of the air flow in the dust collection chamber 111a and the exhaust chamber 111b.

[0087] Exemplarily, the device main body 100 may further include a filter 1145 disposed in the dust collection housing 112, and the filter 1145 is located between the dust collection chamber 111a and the air inlet side of the fan assembly 120, so as to filter the airflow inhaled into the dust collection chamber 111a, avoid dust pollution and damage to the fan assembly 120, and at the same time avoid dust from being mixed into the airflow when the airflow is blown towards the air outlet 202 under the positive pressure of the fan.

[0088] In another possible implementation, the cleaning device may further include an exhaust duct 140. The device main body 100 includes a dust collection housing 112, the fan assembly 120 is connected to the dust collection housing 112, the dust collection housing 112 encloses to form a dust collection chamber 111a, the dust collection chamber 111a is communicated with the dust suction air duct, and the air inlet side of the fan assembly 120 is communicated with the dust collection chamber 111a. The exhaust duct 140 is located on the side of the dust collection housing 112, the first end of the exhaust duct 140 is communicated with the air outlet side of the fan assembly 120, and the second end of the exhaust duct 140 is communicated with the blowing air duct.

[0089] It can be understood that the separately provided exhaust duct 140 can make the airflow blown out by the fan assembly 120 under positive pressure flow more smoothly, reducing wind noise and wind resistance.

[0090] Exemplarily, the exhaust duct 140 may be a flexible pipeline, for example, a corrugated pipe, a rubber pipe, etc., and the embodiments of the present application do not make specific limitations thereto.

[0091] In some embodiments, the device main body 100 further includes an air inlet pipe 113 and a flow guiding assembly 114. The air inlet pipe 113 is connected to the dust collection housing 112, at least part of the structure of the air inlet pipe 113 is inserted into the dust collection housing 112, and the inner wall of the air inlet pipe 113 and the outer wall of the dust collection housing 112 enclose to form a dust collection chamber 111a. The dust collection chamber 111a is used for storing separated dust and sundries.

[0092] Wherein, the air inlet pipe 113 is provided with an air inlet 1131 and a cyclone outlet 1132. The air inlet 1131 faces the outside of the dust collection housing 112, and the cyclone outlet 1132 faces the inside of the dust collection housing 112. The flow guiding assembly 114 is disposed in the dust collection housing 112, and the dust collection housing 112 is provided with an air outlet 1121 on the side of the flow guiding assembly 114 facing away from the air inlet pipe 113. The flow guiding assembly 114 is opposite to the cyclone outlet 1132 and at least part of the structure is located in the air inlet pipe 113, so as to form a swirling flow channel between the flow guiding assembly 114 and the inner wall of the air inlet pipe 113.

[0093] It can be understood that external dust-laden air can enter the air inlet pipe 113 from the air inlet 1131. When flowing out from the cyclone outlet 1132, a cyclone is formed through the cyclone channel between the air guide assembly 114 and the air inlet pipe 113. The air guide assembly 114 can guide the flow of the dust-laden air, so that dust and sundries can be separated by using rotational and centrifugal motions.

[0094] It should be noted that in the cleaning device provided by the embodiment of the present application, a dust collection cavity 111a is formed outside the air inlet pipe 113 by the inner wall of the dust collection housing 112, making full use of the space inside the dust collection housing 112. And the air guide assembly 114 is arranged at the cyclone outlet 1132 at the top of the air inlet pipe 113 to separate the dust-laden air at the end of the air inlet pipe 113. While having a good dust-laden air separation effect, the volume of the entire device main body 100 is reduced to form a long cylindrical structure. Therefore, when applied to the cleaning device, the overall weight of the cleaning device can be reduced, the center of the whole machine can be lowered, and the weight concentration at the holding end of the cleaning device can be avoided, improving the user experience.

[0095] In some embodiments, the air guide assembly 114 may include guide vanes 1141. The guide vanes 1141 are arranged in the cyclone outlet 1132 and are configured to guide the airflow passing through the cyclone outlet 1132 to form a cyclone, so that the airflow mixed with dust and sundries can be discharged from the cyclone outlet 1132 in a rotating manner, and thus the dust and sundries can be separated from the airflow by using centrifugal force, improving the efficiency of dust-laden air separation.

[0096] Exemplarily, the air guide assembly 114 may include a plurality of guide vanes 1141. The plurality of guide vanes 1141 are arranged at intervals around the central axis of the air inlet pipe 113. The plurality of guide vanes 1141 can form a plurality of flow channels, improving the efficiency and flow rate of the airflow flowing out of the air inlet pipe 113 to form a cyclone, and further increasing the centrifugal force for throwing out dust and sundries during dust-laden air separation, having a better dust-laden air separation effect and efficiency.

[0097] Exemplarily, the number of the guide vanes 1141 may be two, three, four or more. The embodiment of the present application does not make specific limitations thereto.

[0098] Exemplarily, the guide vanes 1141 may be welded to the inner wall of the cyclone outlet 1132. The surface of the guide vanes 1141 may be an arc surface to ensure the smoothness when guiding the airflow to form a cyclone, reducing the wind resistance and wind noise.

[0099] In some embodiments, the flow guiding assembly 114 may include a flow guiding member 1142 and a filter 1145. The flow guiding member 1142 is disposed opposite to the cyclone outlet 1132. An air outlet 1121 is provided at one end of the dust collection housing 112 away from the air inlet pipe 113. The fan assembly 120 is connected to the air outlet 1121. The filter 1145 is disposed between the flow guiding member 1142 and the fan assembly 120.

[0100] It can be understood that the cyclone airflow flowing out from the cyclone outlet 1132 can be thrown out to the inner walls around the dust collection housing 112 through the flow guiding member 1142, so as to have a better dust-air separation effect. And the tiny dust remaining in the airflow can be filtered by the filter 1145 to ensure the cleanliness of the air entering the fan assembly 120 and the discharged airflow.

[0101] In some embodiments, the flow guiding member 1142 may include a flow guiding bracket 1143 and a flow guiding ball 1144. The flow guiding bracket 1143 is connected to the inner wall of the dust collection housing 112. The flow guiding ball 1144 is connected to the flow guiding bracket 1143, and at least part of the structure of the flow guiding ball 1144 is inserted into the cyclone outlet 1132. The airflow flowing out from the cyclone outlet 1132 can be accelerated to rotate and diffuse towards the inner walls around the dust collection housing 112 under guidance, improving the dust-air separation efficiency.

[0102] It can be understood that the flow guiding bracket 1143 plays a role in fixing the flow guiding ball 1144 on the one hand. On the other hand, when the dust and air are discharged from the cyclone outlet 1132, the airflow will continue to flow upward and diffuse around under the guidance of the flow guiding ball 1144. The flow guiding bracket 1143 can block the airflow and make the dust and sundries separated by the centrifugal force settle downward.

[0103] Exemplarily, the flow guiding ball 1144 is coaxially arranged with the air inlet pipe 113, so as to ensure the smoothness of the airflow flowing out from the cyclone outlet 1132 and avoid the generation of turbulent flow at the cyclone outlet 1132.

[0104] In some embodiments, the inner wall of the cyclone outlet 1132 encloses to form an air outlet area. The radial cross-sectional diameter of the air outlet area gradually increases in the direction towards the outside of the cyclone outlet 1132. The end of the flow guiding ball 1144 is inserted into the air outlet area.

[0105] It can be understood that the cyclone outlet 1132 can form a trumpet-shaped structure for increasing the flow cross-sectional area of the cyclone outlet 1132, which is beneficial to the outward diffusion of the airflow from the cyclone outlet 1132, thus more efficiently separating dust from air. Since the flow guiding ball 1144 is inserted into the air outlet area, the flow guiding ball 1144 will compress the ventilation area of the cyclone outlet 1132, so that the airflow can increase the flow velocity while diffusing around, and further increase the centrifugal force of the dust and sundries during the dust-air separation in the cyclone.

[0106] Exemplarily, the cross-sectional dimension of the flow guiding ball 1144 along the radial direction of the dust collecting housing 112 first increases and then decreases from the flow guiding bracket 1143 towards the inside of the cyclone outlet 1132. Among them, the cross-sectional dimension of the part of the flow guiding ball 1144 inserted into the cyclone outlet 1132 gradually decreases, and the air outlet area of the cyclone outlet 1132 can be controlled by the flow guiding ball 1144, thereby controlling the air velocity and air pressure of the air flow, so that the air flow can still continue to rotate after being discharged from the cyclone outlet 1132, maintaining the effect of dust-gas separation.

[0107] In some embodiments, ventilation holes are provided on the cyclone bracket, and the ventilation holes communicate the dust collecting chamber 111a and the air outlet 1121. The ventilation holes are arranged near the connection position of the flow guiding ball 1144 and the cyclone bracket. The ventilation holes are used for the air flow after dust-gas separation to flow out, and the ventilation holes are arranged near the root of the flow guiding ball 1144, so that the ventilation holes are as close as possible to the central position of the flow guiding bracket 1143, which can prevent the air flow with dust from directly entering the through holes when being discharged from the cyclone outlet 1132.

[0108] It should be noted that the cyclone bracket can be connected to the inner wall of the dust collecting housing 112 by welding, or the cyclone bracket can be relatively fixed to the inner wall of the dust collecting housing 112 by clamping and limiting.

[0109] Exemplarily, the filter 1145 may include a High Efficiency Particulate Air Filter (HEPA Filter), and the filter 1145 can filter dust impurities in the micron level, thereby ensuring the cleanliness of the air discharged from the device main body 100.

[0110] It should be noted that both the air inlet pipe 113 and the filter 1145 can be connected to the dust collecting housing 112 in a detachable manner, including but not limited to threaded connection, snap connection, elastic interference fit, etc., and the embodiments of the present application do not make specific limitations thereto.

[0111] In some embodiments, a flow disturbing portion 1133 is provided on the outer wall of the air inlet pipe 113, and the flow disturbing portion 1133 extends towards the inner wall of the dust collecting housing 112.

[0112] It can be understood that when the air flow enters the dust collecting chamber 111a and rotates to throw out the dust and sundries, with the rebound and sinking of the air flow, the flow disturbing portion 1133 can block the air flow and the dust and sundries, thereby accelerating the falling of the dust and sundries and preventing the settled dust from being carried up by the air flow.

[0113] Exemplarily, the flow disturbing portion 1133 can be arranged at the top or the middle position of the air inlet pipe 113. The flow disturbing portion 1133 can be welded to the outer wall of the air inlet pipe 113.

[0114] In some embodiments, there may be multiple spoiler parts 1133, and the multiple spoiler parts 1133 are distributed at intervals around the circumferential direction of the air inlet pipe 113. One end of the spoiler part 1133 away from the air inlet pipe 113 abuts against the inner wall of the dust collection housing 112, so as to have a better spoiler effect and further accelerate the falling of dust and sundries into the dust collection chamber 111a.

[0115] It should be noted that when the air inlet pipe 113 and the dust collection housing 112 are assembled, the air inlet pipe 113 is inserted into the interior of the dust collection housing 112. The connecting part at the lower end is threadedly connected to the dust collection housing 112, and the spoiler part 1133 at the upper end abuts against the inner wall of the dust collection housing 112, so as to maintain the stability of the air inlet pipe 113 in the dust collection housing 112 and prevent the air inlet pipe 113 from generating radial displacement or shaking.

[0116] In some embodiments, a dust collection chamber cover 115 is provided on the dust collection housing 112. A dust discharge port is provided on the side wall of the dust collection housing 112, and the dust discharge port communicates the dust collection chamber 111a with the outside of the dust collection housing 112. The dust collection chamber cover 115 is connected to the dust collection housing 112, and the dust collection chamber cover 115 is movably arranged relative to the dust discharge port to open or close the dust discharge port.

[0117] It can be understood that when the cleaning device is in normal use, the dust collection chamber cover 115 closes the discharge port to prevent dust from leaking. When it is necessary to clean the dust collection chamber 111a, the dust collection chamber cover 115 can be opened to pour out the dust and sundries in the dust collection chamber 111a from the discharge port.

[0118] It should be noted that in the device main body 100 provided by the embodiments of the present application, the space between the interior of the dust collection housing 112 and the air inlet pipe 113 forms the dust collection chamber 111a. Therefore, when it is necessary to clean the dust and sundries in the dust collection chamber 111a, it is only necessary to open the dust discharge port on the outer wall of the housing, without removing the dust collection housing 112 from the cleaning device, which improves the convenience of cleaning the dust collection chamber 111a.

[0119] In some embodiments, the device main body 100 further includes a battery assembly 130. An air inlet 1131 and an air outlet 1121 are respectively provided at both axial ends of the dust collection housing 112. The fan assembly 120 is detachably connected to one end of the dust collection housing 112 provided with the air outlet 1121, and the fan assembly 120 is communicated with the air outlet 1121. The battery assembly 130 is detachably connected to one end of the fan assembly 120 away from the dust collection housing 112.

[0120] Among them, inside the dust collection housing 112, dust-laden air can flow through and the dust-laden air is separated, and dust and sundries are stored in the dust collection chamber 111a. The fan assembly 120 is used to generate an air flow so that a negative pressure can be formed at the air inlet 1131 of the device main body 100, thereby realizing the dust suction function. The battery assembly 130 is used to supply electric energy to the fan assembly 120, so that the device main body 100 can be used with or without being plugged in when applied to a cleaning device.

[0121] In some embodiments, the dust collection housing 112, the fan assembly 120, and the battery assembly 130 are coaxially arranged. In this way, along the axial direction of the device main body 100, the dust collection housing 112, the fan assembly 120, and the battery assembly 130 can be arranged in sequence, respectively constituting a part of the structure, so that the overall device main body 100 forms an elongated rod-shaped structure.

[0122] It can be understood that while the dust collection housing 112 provides a channel for the flow of dust-laden air, a separation and storage space for dust and sundries is formed between its own structure and the air inlet pipe 113. The fan assembly 120 is located at the middle position of the device main body 100. Compared with the prior art where the fan is arranged at the top end, the weight of the end of the device main body 100 in this embodiment of the present application is smaller, and the top of the device main body 100 forms a rod-shaped structure by the battery assembly 130, which is convenient for the user to hold during use and is more labor-saving to operate.

[0123] It should be noted that the device main body 100 provided in the present application can play the role of an operation main body when applied to a cleaning device. The coaxially assembled dust collection housing 112, fan assembly 120, and battery assembly 130 as a whole form a rod-shaped structure for the user to hold during use. Since the three components are arranged in sequence, the axial weight distribution of the overall structure of the device main body 100 is more uniform, the structure is more compact and small, the lightweight effect of the device main body 100 is realized, the weight of the hand-held position during use is reduced, and the use experience is improved.

[0124] In the embodiment of the present application, the fan assembly 120 provided on the device main body 100 has a positive pressure side and a negative pressure side. The negative pressure side sucks air and is connected to the dust suction air duct, and the positive pressure side discharges air and is connected to the blowing air duct. When the fan assembly 120 is started, the suction port 201 forms a negative pressure to suck dust and sundries on the surface to be cleaned, and the blowing port 202 forms a positive pressure to blow out air to the surface to be cleaned, so as to lift stubborn dust and sundries attached to the corner positions and the ground.

[0125] It can be understood that the cleaning device can have multiple working modes, including but not limited to a normal dust suction mode, a dust raising mode, etc. Among them, when the normal dust suction mode is started, dust can be only sucked in from the suction port 201, and no air flow is blown out from the blowing port 202. When the dust raising mode is started, while the suction port 201 generates negative pressure to suck in dust, the blowing port 202 blows out air flow simultaneously to raise dust, thereby improving the cleaning efficiency of the surface to be cleaned.

[0126] The user can switch and select different working modes according to the specific usage scenario. For example, when cleaning a floor with relatively less dust, the normal dust suction mode can be used; when cleaning indoor corners and the area where seats are placed, the dust raising mode can be used. The structure of the fan assembly 120 for realizing the above-mentioned function mode switching will be described in detail below.

[0127] In some embodiments, the fan assembly 120 can include a fan housing 121 and a fan unit. The fan unit is disposed inside the fan housing 121. The fan housing 121 has a first air outlet 1211 and a second air outlet 1212. The first air outlet 1211 is communicated with the blowing air duct, and the second air outlet 1212 is communicated with the external space of the fan housing 121.

[0128] Among them, the cleaning device can further include a switching unit 123. The switching unit 123 is disposed on the air outlet side of the fan unit inside the fan housing 121. The switching unit 123 is configured to communicate the air outlet side of the fan unit with any one of the first air outlet 1211 and the second air outlet 1212.

[0129] It can be understood that when the normal dust suction mode is started, the switching unit 123 can be switched to communicate the air outlet side of the fan unit with the second air outlet 1212. In this way, the dust-laden air sucked in from the suction port 201 by the negative pressure of the fan unit can be discharged into the external atmosphere after being filtered. When the dust raising mode is started, the switching unit 123 can be switched to communicate the air outlet side of the fan unit with the first air outlet 1211. In this way, the dust-laden air sucked in from the suction port 201 by the negative pressure of the fan unit can be blown from the blowing port 202 to the surface to be cleaned through the blowing air duct to realize the dust raising function.

[0130] Exemplarily, the switching unit 123 can include a motor and a movable plate. The motor can drive the movable plate to rotate, change the air flow direction of the air outlet side of the fan unit, and realize the selective communication between the air outlet side of the fan unit and the first air outlet 1211 and the second air outlet 1212.

[0131] The embodiments of the present application provide a cleaning device and a cleaning equipment. The cleaning device includes a base, a dust suction pipeline and a blowing pipeline. The dust suction pipeline and the blowing pipeline are both arranged on the base. The base is provided with a dust suction port and a dust raising cavity, and both the dust suction port and the dust raising cavity face downward of the base. The dust suction pipeline is communicated with the dust suction port, the cavity wall of the dust raising cavity is provided with a blowing port, the blowing pipeline is communicated with the blowing port, the bottom of the base is provided with a dust baffle, the dust baffle is located between the dust suction port and the blowing port, and one side of the dust baffle facing the blowing port forms a part of the cavity wall of the dust raising cavity. An opening is provided on the dust baffle, and the opening communicates the dust suction port and the dust raising cavity, so that stubborn dust attached to the ground or deep in the blanket can be blown up, the dust on the surface to be cleaned is raised in the dust raising cavity, the dust suction port can suck the raised dust into the dust suction pipeline through the opening of the dust baffle, and the dust baffle can prevent the raised dust from overflowing the dust raising cavity, thereby maintaining an efficient and good cleaning effect.

[0132] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A cleaning device (200), characterized in that: The cleaning device (200) comprises a base (210), a dust suction duct (220) and a blowing duct (230), wherein the dust suction duct (220) and the blowing duct (230) are both arranged on the base (210); the base (210) is provided with an air suction port (201) and a dust raising chamber (206), wherein the air suction port (201) and the dust raising chamber (206) are both oriented toward the bottom of the base (210); the dust suction duct (220) is communicated with the air suction port (201), a cavity wall of the dust raising chamber (206) is provided with a blowing port (202), and the blowing duct (230) is communicated with the blowing port (202); the blowing port (202) is located at the front side of the air suction port (201) along the cleaning direction of the cleaning device (200); A dust shield (240) is provided at the bottom of the base (210), and the dust shield (240) is located between the air suction port (201) and the air blowing port (202), and the side of the dust shield (240) facing the air blowing port (202) forms a part of the cavity wall of the dust raising cavity (206); an opening (241) is provided on the dust shield (240), and the opening (241) connects the air suction port (201) and the dust raising cavity (206).

2. The cleaning device (200) according to claim 1, characterized in that: The air suction port (201) extends along a first direction, and the extension direction of the dust raising chamber (206) is parallel to the air suction port (201); wherein the first direction is perpendicular to the cleaning direction of the cleaning device (200).

3. The cleaning device (200) according to claim 1, characterized in that: The length of the air suction port (201) is greater than or equal to the length of the dust raising chamber (206), and the projection of the air suction port (201) in the cleaning direction of the cleaning device (200) covers the dust raising chamber (206).

4. The cleaning device (200) according to any one of claims 1 to 3, characterized in that: The dust suction duct (220) and the blowing duct (230) are arranged along the height direction of the base (210), and the blowing duct (230) is located above the dust suction duct (220).

5. The cleaning device (200) according to claim 4, characterized in that: The base (210) has an air suction chamber (203) and an air blowing chamber (204); the dust suction duct (220) is in communication with the air suction chamber (203); and the air blowing duct (230) is in communication with the air blowing chamber (204); The air suction chamber (203) and the air blowing chamber (204) are arranged in layers along the height direction of the base (210); the air suction port (201) is formed at one end of the air suction chamber (203) facing the bottom of the base (210); the air blowing chamber (204) extends from the top of the air suction chamber (203) to the front end of the air suction chamber (203) along the cleaning direction of the cleaning device (200), and is connected to the dust raising chamber (206) through the air blowing port (202).

6. The cleaning device (200) according to any one of claims 1 to 3, characterized in that: There are a plurality of the blowing ports (202), and the plurality of the blowing ports (202) are arranged at intervals along the length direction of the dust-raising chamber (206), and the air outlet direction of at least one of the plurality of the blowing ports (202) is inclined toward the air suction port (201) relative to the vertical direction.

7. The cleaning device (200) according to any one of claims 1 to 3, characterized in that: The cavity wall of the dust-raising cavity (206) is arc-shaped, and the air suction port (201) is located at the top of the dust-raising cavity (206).

8. The cleaning device (200) according to any one of claims 1 to 3, characterized in that: There are a plurality of openings (241), and the plurality of openings (241) are spaced apart along the length direction of the dust shield (240). The plurality of openings (241) form a plurality of dust guiding channels (205) between the air suction port (201) and the dust raising chamber (206).

9. The cleaning device (200) according to any one of claims 1 to 3, characterized in that: The first end of the dust shield (240) is rotatably connected to the base (210), and the second end of the dust shield (240) is directed toward the bottom of the base (210); the cleaning device (200) is configured to adjust the relative size of the air suction port (201) and the dust chamber (206) by rotating the dust shield (240).

10. A cleaning device, characterized in that: The cleaning device comprises a device body (100) and a cleaning device (200) according to any one of claims 1 to 9, the device body (100) being movably connected to the cleaning device (200), the device body (100) being provided with a dust collecting chamber (111a) and a fan assembly (120), the dust collecting chamber (111a) being communicated with a dust suction pipe (220), the fan assembly (120) comprising a first fan unit (122), the air inlet side of the first fan unit (122) being communicated with the dust collecting chamber (111a); The air outlet side of the first fan unit (122) is in communication with the air blowing duct (230), or the fan assembly (120) further comprises a second fan unit, the air outlet side of the second fan unit is in communication with the air blowing duct (230).

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