A fan and cleaning apparatus

Abstract

The application relates to the field of base station noise reduction technology, in particular to a fan and cleaning equipment, the fan comprising a machine body and a first shell, the first shell being provided with a first containing cavity and a first air duct, wherein the machine body is located in the first containing cavity. The first air duct is provided with an air inlet and an air outlet, the air inlet being communicated with the first containing cavity and the first air duct. The ratio of the cross-sectional area of the first air duct perpendicular to the airflow direction to the area of the air inlet and the ratio of the cross-sectional area of the first air duct perpendicular to the airflow direction to the area of the air outlet are both greater than or equal to 5. The fan provided by the application can reduce the generated noise.

Description

Technical Field

[0001] This application relates to the field of base station noise reduction technology, and in particular to a fan and cleaning equipment. Background Technology

[0002] A base station is a device used in conjunction with a robotic vacuum cleaner. The robotic vacuum cleaner cleans the floors by collecting dust, debris, hair, and other waste. The base station can store the robotic vacuum cleaner for users to dispose of in a centralized manner.

[0003] A base station typically includes a fan and a channel. The fan is located inside the channel and can draw out and store the trash from the robot vacuum cleaner.

[0004] In related technologies, fans generate significant noise during operation, which can cause disturbance to users. Utility Model Content

[0005] In view of this, this application provides a fan and cleaning equipment to reduce the noise generated.

[0006] Specifically, the following technical solutions are included:

[0007] A first aspect of this application provides a fan, the fan comprising a body and a first housing, the first housing having a first receiving cavity and a first air duct, wherein...

[0008] The body is located within the first accommodating cavity.

[0009] The first air duct has an air inlet and an air outlet, and the air inlet connects the first receiving cavity and the first air duct.

[0010] The ratio of the cross-sectional area of ​​the first air duct perpendicular to the airflow direction to the area of ​​the air inlet and the ratio of the cross-sectional area of ​​the first air duct perpendicular to the airflow direction to the area of ​​the air outlet are both greater than or equal to 5.

[0011] Optionally, there are multiple air inlets, which are distributed on the same side of the first air duct, and the ratio of the cross-sectional area of ​​the first air duct perpendicular to the airflow direction to the sum of the areas of the multiple air inlets is greater than or equal to 5.

[0012] Optionally, the fan includes a noise reduction box having a second air duct and a first opening. The noise reduction box is connected to the first housing, and the second air duct connects the first opening to the air outlet.

[0013] Optionally, the fan includes an extension having a third air duct, the extension being connected to the first housing, and the third air duct connecting the air outlet and the second air duct.

[0014] Optionally, the extension has a resonant cavity located on one side of the second air duct and communicating with the second air duct.

[0015] Optionally, the length of the resonant cavity along the extension direction of the third air duct is 40 to 60 mm.

[0016] Optionally, the first housing includes a first part and a second part, the first part having the air inlet and the first receiving cavity, the second part having the air outlet, the second part being connected to the side wall of the first part and forming the first air duct with the first part.

[0017] Optionally, the second part includes a bottom shell and a cover plate, the bottom shell being integrally formed with the first part, the bottom shell having a second opening, the cover plate covering the second opening, and the cover plate, the bottom shell, and the first part forming the first air duct.

[0018] A second aspect of this application provides a cleaning device, the cleaning device including a second housing and a fan as described in the above technical solution, wherein the first housing is connected to the second housing.

[0019] Optionally, the fan has a second air duct and a first opening, the second air duct connecting the first opening and the air outlet, the second housing having a second receiving cavity and a third opening, the fan being located within the second receiving cavity, the second receiving cavity connecting the first opening and the third opening.

[0020] Optionally, the ratio of the cross-sectional area of ​​the second accommodating cavity perpendicular to the airflow direction to the area of ​​the first opening and the ratio of the cross-sectional area of ​​the second accommodating cavity perpendicular to the airflow direction to the area of ​​the third opening are both greater than or equal to 5.

[0021] Optionally, there may be multiple third openings, which are distributed on one side of the second receiving cavity. The ratio of the sum of the cross-sectional area of ​​the second receiving cavity perpendicular to the airflow direction and the area of ​​the third opening is greater than or equal to 5.

[0022] Optionally, there may be multiple first openings distributed on the sidewall of the fan, and the ratio of the cross-sectional area of ​​the second receiving cavity perpendicular to the airflow direction to the sum of the areas of the first openings is greater than or equal to 5.

[0023] The beneficial effects of the technical solution provided in this application embodiment include at least the following: the first housing can accommodate the machine body through the first receiving cavity. The machine body can generate airflow during operation, and the airflow enters the first air duct through the air inlet and exits from the air outlet. The air inlet and the first air duct, as well as the air outlet and the first air duct, have a large area difference, so that the noise carried by the airflow is consumed in the first air duct when it passes through the first air duct, thereby reducing the noise generated by the fan. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a fan provided in an embodiment of this application;

[0026] Figure 2 A schematic diagram of the structure of the first housing provided in an embodiment of this application;

[0027] Figure 3 A schematic diagram of the assembly structure of a noise reduction box and an extension provided in an embodiment of this application;

[0028] Figure 4 This is a full sectional view of a cleaning device provided in an embodiment of this application;

[0029] Figure 5 A transmission loss diagram is provided for an embodiment of this application.

[0030] The reference numerals in the figure indicate:

[0031] 1. Organism;

[0032] 2. First housing; 201. First receiving cavity; 202. First air duct; 2021. Air inlet; 2022. Air outlet; 21. First part; 22. Second part; 221. Bottom shell; 22101. Second opening; 222. Cover plate; 23. Extension; 2301. Third air duct; 2302. Resonant cavity;

[0033] 3. Noise reduction box; 301. Second air duct; 302. First opening;

[0034] 4. Second housing; 401. Second receiving cavity; 402. Third opening.

[0035] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0037] In the embodiments of this application, directional terms such as "upper," "lower," and "side" are generally used in the following ways: Figure 1 The relative positions shown are based on the given information, and these directional terms are used only to more clearly describe the relationships between structures, not to describe absolute positions. Positions may change when the product is placed in different orientations; for example, "up" and "down" may be interchanged.

[0038] Unless otherwise defined, all technical terms used in the embodiments of this application have the same meaning as commonly understood by one of ordinary skill in the art.

[0039] To make the technical solutions and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0040] The first aspect of this application provides a fan, such as Figure 1 and Figure 2 As shown, the fan includes a body 1 and a first housing 2. The first housing 2 has a first receiving cavity 201 and a first air duct 202, wherein...

[0041] The body 1 is located inside the first receiving cavity 201.

[0042] The first air duct 202 has an air inlet 2021 and an air outlet 2022. The air inlet 2021 connects the first receiving cavity 201 and the first air duct 202.

[0043] The ratio of the cross-sectional area of ​​the first air duct 202 perpendicular to the airflow direction to the area of ​​the air inlet 2021 and the ratio of the cross-sectional area of ​​the first air duct 202 perpendicular to the airflow direction to the area of ​​the air outlet 2022 are both greater than or equal to 5.

[0044] Understandably, the first housing 2 can accommodate the body 1 through the first receiving cavity 201. The body 1 generates airflow during operation. The airflow enters the first air duct 202 through the air inlet 2021 and exits through the air outlet 2022. The air inlet 2021 and the first air duct 202, as well as the air outlet 2022 and the first air duct 202, have a significant area difference. This allows the noise carried by the airflow to be absorbed within the first air duct 202, thereby reducing the noise generated by the fan.

[0045] In this embodiment, since the ratio of the cross-sectional area of ​​the first air duct 202 perpendicular to the airflow direction to the area of ​​the air inlet 2021 and the ratio of the cross-sectional area of ​​the first air duct 202 perpendicular to the airflow direction to the area of ​​the air outlet 2022 are both greater than or equal to 5, the sound waves carried by the airflow will undergo multiple reflections, superpositions, and interferences during the process of the airflow passing through the air inlet 2021, the first air duct 202, and the air outlet 2022. These phenomena can reduce the energy carried by the sound waves, thereby achieving the purpose of noise reduction.

[0046] In the embodiments of this application, the noise reduction effect is as follows: Figure 5 As shown in the figure, the horizontal axis represents frequency, and the vertical axis represents the transmission loss between the air inlet 2021 and the air outlet 2022. The larger this value, the better the noise reduction performance. The difference between the comparative example and the embodiment is that in the comparative example, the ratio of the cross-sectional area of ​​the first air duct 202 perpendicular to the airflow direction to the area of ​​the air inlet 2021 and the ratio of the cross-sectional area of ​​the first air duct 202 perpendicular to the airflow direction to the area of ​​the air outlet 2022 are both less than 5. Among them, the embodiment has a better noise reduction effect than the comparative example at frequencies such as 1725Hz, 2400Hz, and 3025Hz, and the transmission loss of the embodiment at 3025Hz is 72.4dB.

[0047] In this embodiment, the body 1 can be a centrifugal fan, axial flow fan, bleeder fan, crossflow fan, or other type of fan.

[0048] In this embodiment of the application, the first housing 2 can be formed by processes such as injection molding.

[0049] In this embodiment of the application, the body 1 and the side wall of the first receiving cavity 201 can be connected by bolts, welding and bonding, so that the body 1 can maintain its posture within the first receiving cavity 201.

[0050] In the embodiments of this application, the shape of the air inlet 2021 can be a square, a circle or other geometric shape, or a combination of several geometric shapes, or an irregular shape.

[0051] In the embodiments of this application, the shape of the air outlet 2022 can be a square, a circle or other geometric shape, or a combination of several geometric shapes, or an irregular shape.

[0052] In this embodiment of the application, after the airflow generated by the body 1 enters the first air duct 202 through the air inlet 2021, the extension direction of the first air duct 202 can either leave the first air duct 202 through the air outlet 2022, or it can leave the first air duct 202 through the air outlet 2022 along the direction of the thrust of the airflow.

[0053] In this embodiment of the application, the air inlet 2021, the first air duct 202 and the air outlet 2022 can be arranged sequentially along a straight extension direction or sequentially along a curved extension direction.

[0054] In this embodiment, the ratio of the cross-sectional area of ​​the first air duct 202 perpendicular to the airflow direction to the area of ​​the air inlet 2021 can be 5, 6, 7 or 8, or other ratios greater than 5.

[0055] In this embodiment, the ratio of the cross-sectional area of ​​the first air duct 202 perpendicular to the airflow direction to the area of ​​the air outlet 2022 can be 5, 6, 7 or 8, or other ratios greater than 5.

[0056] In some embodiments of this application, such as Figure 2 As shown, there are multiple air inlets 2021, which are distributed on the same side of the first air duct 202. The ratio of the cross-sectional area of ​​the first air duct 202 perpendicular to the airflow direction to the sum of the areas of the multiple air inlets 2021 is greater than or equal to 5.

[0057] It is understandable that the area of ​​a single air inlet 2021 is smaller than that of the first air duct 202. This is beneficial because when the airflow passes through the air inlet 2021, it can rub against the wall of the air inlet 2021, converting the sound energy of the sound wave into heat energy, thereby achieving the effect of reducing noise.

[0058] In the embodiments of this application, the shape of the air inlet 2021 can be a square, a circle or other geometric shape, or a combination of several geometric shapes, or an irregular shape.

[0059] In this embodiment, the number of air inlets 2021 can be 2, 3, 4, or other numbers. Multiple air inlets 2021 can be arranged in an array on the first housing 2.

[0060] In some embodiments of this application, such as Figure 3As shown, the fan includes a noise reduction box 3, which has a second air duct 301 and a first opening 302. The noise reduction box 3 is connected to the first housing 2, and the second air duct 301 connects the first opening 302 and the air outlet 2022.

[0061] Understandably, the airflow entering the second air duct 301 from the air outlet 2022 can exit the fan through the first opening 302, thus achieving the adsorption of garbage. The noise reduction box 3 can reduce the noise of the airflow in the second air duct 301, thereby reducing the noise generated by the fan when it exits the first opening 302.

[0062] In this embodiment, the noise reduction box 3 can be directly connected to the first housing 2 by means of bolt connection, welding and bonding, or it can be indirectly connected to the first housing 2 by means of intermediate parts.

[0063] In this embodiment, the noise reduction box 3 can be manufactured by processes such as injection molding, and during the molding process, a second air duct 301 and a first opening 302 are formed.

[0064] In some embodiments of this application, such as Figure 1 and Figure 3 As shown, the fan includes an extension 23, which has a third air duct 2301. The extension 23 is connected to the first housing 2, and the third air duct 2301 connects to the air outlet 2022 and the second air duct 301.

[0065] Understandably, the extension 23 can extend the airflow path in the fan, which is beneficial for the fan to blow the airflow to a suitable position on the base station through the extension 23, thereby completing the adsorption of garbage. The extension connects the air outlet 2022 and the second air duct 301 through the third air duct 2301, so that the airflow can leave the fan through the noise reduction box 3, thereby completing the adsorption of garbage.

[0066] In this embodiment, the extension 23 can be connected to the first housing 2 by means of bolting, welding, or bonding.

[0067] In this embodiment of the application, the extension direction of the second air duct 301 intersects with the extension direction of the third air duct 2301.

[0068] In some embodiments of this application, such as Figure 4 As shown, the extension 23 has a resonant cavity 2302, which is located on one side of the second air duct 301 and is connected to the second air duct 301.

[0069] Understandably, the resonant cavity 2302 facilitates the entry of sound waves and the formation of resonance. The resonant sound waves have a large amplitude, which helps to convert the energy of the sound waves into heat energy and reduce noise.

[0070] In some embodiments of this application, such as Figure 3 and Figure 4 As shown, the length of the resonant cavity 2302 along the extension direction of the third air duct 2301 is 40 to 60 mm.

[0071] Understandably, within this range, the frequency of the noise attenuated by the resonant cavity 2302 is within the range that the user can access, which helps to reduce the impact of noise on the user.

[0072] In this embodiment, when the length of the resonant cavity 2302 along the extension direction of the third air duct 2301 is 40mm, it exhibits good noise reduction effects at 750Hz, 2975Hz, and 3425Hz. The maximum noise reduction at 750Hz is 60.4dB.

[0073] In this embodiment, when the length of the resonant cavity 2302 along the extension direction of the third air duct 2301 is 55mm, it exhibits good noise reduction effects at 625Hz, 2975Hz, and 3425Hz. The maximum noise reduction at 625Hz is 39.6dB.

[0074] In this embodiment, when the length of the resonant cavity 2302 along the extension direction of the third air duct 2301 is 60mm, it exhibits good noise reduction effects at 600Hz, 2975Hz, and 3425Hz. The maximum noise reduction at 600Hz is 42.0dB.

[0075] In this embodiment of the application, the cross-section of the resonant cavity 2302 perpendicular to the extension direction of the third air duct 2301 can be rectangular, wherein the long side of the cross-section is 50mm and the short side is 15mm.

[0076] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, the first housing 2 includes a first part 21 and a second part 22. The first part 21 has an air inlet 2021 and a first receiving cavity 201. The second part 22 has an air outlet 2022. The second part 22 is connected to the side wall of the first part 21 and forms a first air duct 202 with the first part 21.

[0077] Understandably, since both the air inlet 2021 and the air outlet 2022 are located inside the first housing 2, the first housing 2 is somewhat difficult to manufacture. By arranging the air inlet 2021 and the air outlet 2022 of the first air duct 202 on the first part 21 and the second part 22, and then connecting the first part 21 and the second part 22, the manufacturing difficulty of the first housing 2 can be reduced.

[0078] In this embodiment of the application, both the first part 21 and the second part 22 can be made of plastic, which helps to reduce the weight of the fan.

[0079] In this embodiment, the first part 21 may be a hollow cylinder, and the second part 22 is connected to the sidewall of the first part 21.

[0080] In some embodiments of this application, such as Figure 1 and Figure 2 As shown, the second part 22 includes a bottom shell 221 and a cover plate 222. The bottom shell 221 is integrally formed with the first part 21. The bottom shell 221 has a second opening 22101. The cover plate 222 covers the second opening 22101. The cover plate 222, the bottom shell 221 and the first part 21 form a first air duct 202.

[0081] Understandably, the bottom shell 221 and the cover plate 222 are integrally molded, which reduces the assembly process between the first part 21 and the bottom shell 221. The second opening 22101 can serve as a clearance mechanism, facilitating the integral molding of the bottom shell 221 and the first part 21 through processes such as injection molding. The cover plate 222 covers the second opening 22101, which can reduce airflow leakage from the second opening 22101, thereby improving the sealing performance of the first air duct 202.

[0082] In this embodiment, the cover plate 222 may be connected to the bottom shell 221 by means of bolts, adhesive, or other methods, and together with the first part 21, form the first air duct 202. Alternatively, the cover plate 222 may be connected to the bottom shell 221 and the first part 21 by means of bolts, adhesive, or other methods, thereby forming the first air duct 202.

[0083] A second aspect of this application provides a cleaning device, such as Figure 4 As shown, the cleaning equipment includes a second housing 4 and a fan as described in the above embodiment, with the first housing 2 connected to the second housing 4.

[0084] It is understood that, due to the use of the fan in the above embodiments, the cleaning equipment of this application has the same technical effects as the above embodiments, and will not be described again here.

[0085] In some embodiments of this application, such as Figure 4 As shown, the fan has a second air duct 301 and a first opening 302. The second air duct 301 connects the air outlet 2022 and the first opening 302. The second housing 4 has a second receiving cavity 401 and a third opening 402. The fan is located in the second receiving cavity 401, which connects the first opening 302 and the third opening 402.

[0086] Understandably, the second air duct 301 can introduce the airflow passing through the outlet 2022 into the first opening 302, and then through the second receiving cavity 401, finally exiting the cleaning equipment through the third opening 402, thus completing the adsorption of waste. The second air duct 301 can serve as an intermediate component adapting to the positions of the fan and the third opening 402; it can be bent according to the positional relationship between the two, which facilitates the airflow passing through the third opening 402.

[0087] In some embodiments of this application, the ratio of the cross-sectional area of ​​the second receiving cavity 401 perpendicular to the airflow direction to the area of ​​the first opening 302 and the ratio of the cross-sectional area of ​​the second receiving cavity 401 perpendicular to the airflow direction to the area of ​​the third opening 402 are both greater than or equal to 5.

[0088] Understandably, since the ratio of the cross-sectional area of ​​the second receiving cavity 401 perpendicular to the airflow direction to the area of ​​the first opening 302, and the ratio of the cross-sectional area of ​​the second receiving cavity 401 perpendicular to the airflow direction to the area of ​​the third opening 402, are both greater than or equal to 5, the sound waves carried by the airflow will undergo multiple reflections, superpositions, and interferences as the airflow passes through the first opening 302, the second receiving cavity 401, and the third opening 402. These phenomena can reduce the energy carried by the sound waves, thereby achieving the purpose of noise reduction.

[0089] In some embodiments of this application, there are multiple third openings 402, which are distributed on one side of the second receiving cavity 401. The ratio of the sum of the cross-sectional area of ​​the second receiving cavity 401 perpendicular to the airflow direction and the area of ​​the third openings 402 is greater than or equal to 5.

[0090] Understandably, the area of ​​a single third opening 402 is smaller than that of the second receiving cavity 401. This is beneficial because when the airflow passes through the third opening 402, it can rub against the wall of the third opening 402, converting the sound energy of the sound wave into heat energy, thereby achieving the effect of reducing noise.

[0091] In this embodiment, the ratio of the cross-sectional area of ​​the second receiving cavity 401 perpendicular to the airflow direction to the area of ​​the third opening 402 can be 5, 6, 7 or 8, or other ratios greater than 5.

[0092] In this embodiment, the number of third openings 402 can be 2, 3, 4, or other numbers. Multiple air inlets 2021 can be arranged in an array on the second housing 4.

[0093] In some embodiments of this application, there are multiple first openings 302, which are distributed on the sidewall of the fan. The ratio of the sum of the cross-sectional area of ​​the second receiving cavity 401 perpendicular to the airflow direction and the area of ​​the third opening 402 is greater than or equal to 5.

[0094] Understandably, the area of ​​a single first opening 302 is smaller than that of the second receiving cavity 401. This is beneficial because when the airflow passes through the first opening 302, it can rub against the wall of the first opening 302, converting the sound energy of the sound wave into heat energy, thereby achieving the effect of reducing noise.

[0095] In this embodiment, the ratio of the cross-sectional area of ​​the second receiving cavity 401 perpendicular to the airflow direction to the area of ​​the first opening 302 can be 5, 6, 7 or 8, or other ratios greater than 5.

[0096] In this embodiment, the number of first openings 302 can be 2, 3, 4, or other numbers. Multiple air inlets 2021 can be arranged in an array on the first housing 2.

[0097] In this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0098] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0099] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A fan, characterized in that, The fan includes a body (1) and a first housing (2), the first housing (2) having a first receiving cavity (201) and a first air duct (202), wherein, The body (1) is located inside the first receiving cavity (201); The first air duct (202) has an air inlet (2021) and an air outlet (2022), and the air inlet (2021) connects the first receiving cavity (201) and the first air duct (202). The ratio of the cross-sectional area of ​​the first air duct (202) perpendicular to the airflow direction to the area of ​​the air inlet (2021) and the ratio of the cross-sectional area of ​​the first air duct (202) perpendicular to the airflow direction to the area of ​​the air outlet (2022) are both greater than or equal to 5.

2. The fan according to claim 1, characterized in that, The number of air inlets (2021) is multiple, and the multiple air inlets (2021) are distributed on the same side of the first air duct (202). The ratio of the cross-sectional area of ​​the first air duct (202) perpendicular to the airflow direction to the sum of the areas of the multiple air inlets (2021) is greater than or equal to 5.

3. The fan according to claim 1, characterized in that, The fan includes a noise reduction box (3), which has a second air duct (301) and a first opening (302). The noise reduction box (3) is connected to the first housing (2), and the second air duct (301) connects the first opening (302) and the air outlet (2022).

4. The fan according to claim 3, characterized in that, The fan includes an extension (23) having a third air duct (2301), the extension (23) being connected to the first housing (2), and the third air duct (2301) connecting the air outlet (2022) and the second air duct (301).

5. The fan according to claim 4, characterized in that, The extension (23) has a resonant cavity (2302) located on one side of the second air duct (301) and connected to the second air duct (301).

6. The fan according to claim 5, characterized in that, The length of the resonant cavity (2302) along the extension direction of the third air duct (2301) is 40 to 60 mm.

7. The fan according to claim 1, characterized in that, The first housing (2) includes a first part (21) and a second part (22). The first part (21) has the air inlet (2021) and the first receiving cavity (201). The second part (22) has the air outlet (2022). The second part (22) is connected to the side wall of the first part (21) and forms the first air duct (202) with the first part (21).

8. The fan according to claim 7, characterized in that, The second part (22) includes a bottom shell (221) and a cover plate (222). The bottom shell (221) is integrally formed with the first part (21). The bottom shell (221) has a second opening (22101). The cover plate (222) covers the second opening (22101). The cover plate (222), the bottom shell (221) and the first part (21) form the first air duct (202).

9. A cleaning device, characterized in that, The cleaning equipment includes a second housing (4) and a fan as described in any one of claims 1 to 8, wherein the first housing (2) is connected to the second housing (4).

10. The cleaning equipment according to claim 9, characterized in that, The fan has a second air duct (301) and a first opening (302), the second air duct (301) connecting the first opening (302) and the air outlet (2022), the second housing (4) having a second receiving cavity (401) and a third opening (402), the fan being located in the second receiving cavity (401), the second receiving cavity (401) connecting the first opening (302) and the third opening (402).

11. The cleaning equipment according to claim 10, characterized in that, The ratio of the cross-sectional area of ​​the second receiving cavity (401) perpendicular to the airflow direction to the area of ​​the first opening (302) and the ratio of the cross-sectional area of ​​the second receiving cavity (401) perpendicular to the airflow direction to the area of ​​the third opening (402) are both greater than or equal to 5.

12. The cleaning equipment according to claim 11, characterized in that, The number of the third openings (402) is multiple, and the multiple third openings (402) are distributed on one side of the second receiving cavity (401). The ratio of the cross-sectional area of ​​the second receiving cavity (401) perpendicular to the airflow direction to the sum of the areas of the third openings (402) is greater than or equal to 5.

13. The cleaning equipment according to claim 11, characterized in that, The number of the first openings (302) is multiple, and the multiple first openings (302) are distributed on the side wall of the fan. The ratio of the cross-sectional area of ​​the second receiving cavity (401) perpendicular to the airflow direction to the sum of the areas of the first openings (302) is greater than or equal to 5.

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