Cleaning equipment and cleaning system

Abstract

The embodiment of the utility model provides cleaning equipment and a cleaning system. The cleaning equipment comprises a main body and a fan assembly; the fan assembly is connected with the main body and comprises a shell and a wind wheel, and the shell is provided with a containing cavity, an air inlet and an air outlet, the shell is further provided with a silencing cavity communicating with the containing cavity. The wind wheel is arranged in the accommodating cavity; wherein the noise reduction cavity is located between the wind wheel and the air outlet, and the included angle between the depth direction of the noise reduction cavity and the air outlet direction of the air outlet ranges from 0 degree to 180 degrees, so that noise is reduced.

Description

[0001] This application is a divisional application of Chinese Patent Application No. 2024208167168, filed on April 18, 2023. Technical Field

[0002] This application belongs to the field of electrical equipment technology, and in particular relates to a cleaning device and cleaning system. Background Technology

[0003] Fan assemblies are widely used in electrical equipment, especially in cleaning equipment. Their main function is to enable rapid airflow within electrical equipment, creating negative pressure to achieve cleaning. However, in some technologies, excessive noise levels can occur during operation due to factors such as high airflow speeds or abnormal noise from the impeller. Utility Model Content

[0004] This application aims to at least partially improve the technical problem of excessive noise in wind turbine components. Therefore, This application provides a fan assembly, cleaning equipment, and cleaning system.

[0005] In a first aspect, an embodiment of this application provides a wind turbine assembly, comprising:

[0006] The housing has a receiving cavity and an air inlet and an air outlet communicating with the receiving cavity;

[0007] The impeller is disposed within the receiving cavity;

[0008] The housing contains a silencing cavity that communicates with the receiving cavity, and the silencing cavity is located within the impeller. The silencer cavity is positioned at an angle to the air outlet, with its depth direction forming an angle with the air outlet's airflow direction, to reduce... Low noise.

[0009] A silencing chamber is installed between the impeller and the air outlet, with the depth of the silencing chamber forming an angle with the air outlet's outlet direction. The design involves setting the depth of the silencing cavity at an angle to the direction of the air duct within the cavity. When noise propagates to the cavity... At this time, it will diffuse into the cavity and move to the bottom wall of the cavity before reflecting back, and finally return to the air duct, where it mixes with the noise inside the air duct. The sound is superimposed, thus achieving the purpose of noise reduction, which can reduce the noise volume from the air outlet to a certain extent.

[0010] In an optional embodiment of this application, the air inlet and the air outlet are respectively disposed on two sides of the housing. At the end, the silencing cavity is disposed on the side wall of the housing, and the depth direction of the silencing cavity is aligned with the air outlet direction. vertical.

[0011] In an optional embodiment of this application, there are multiple silencing cavities, which are spaced apart.

[0012] In optional embodiments of this application, the depths of any two of the silencing cavities may be the same or different.

[0013] In an optional embodiment of this application, in the direction from the air inlet to the air outlet, a plurality of the [unclear] The sound chambers are arranged sequentially at intervals or side by side.

[0014] In an optional embodiment of this application, the silencing cavity is located in the direction from the air inlet to the air outlet. They have the same depth.

[0015] In an optional embodiment of this application, the silencing cavity is located in the direction from the air inlet to the air outlet. The depth decreases sequentially.

[0016] In an optional embodiment of this application, at least two [air inlets / outlets] are present in the direction from the air inlet to the air outlet. The depths of the silencing cavities are different.

[0017] In an optional embodiment of this application, the silencing cavity has an opening communicating with the receiving cavity, along the silencing cavity... In the depth direction of the sound cavity, the projected area of ​​the anechoic cavity at the opening is equal to the area of ​​the receiving cavity at the opening. The ratio of cross-sectional areas is [0.8-1].

[0018] In an optional embodiment of this application, the depth of the silencing cavity is set according to the following formula:

[0019] f = (c / l)(2n+1) / 4;

[0020] Where f is the frequency of the noise, c is the speed of sound of the noise, l is the depth of the silencing cavity, and n is a positive integer.

[0021] Secondly, embodiments of this application provide a cleaning device, including a main body and the cleaning device described in the first aspect. A fan assembly, which is connected to the main body.

[0022] The beneficial effects of the cleaning equipment provided in the second aspect are similar to those of the cleaning equipment provided in the first aspect. The same applies here, so I will not repeat it further. Attached Figure Description

[0023] 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 some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 A schematic diagram of the structure of a wind turbine assembly provided in one embodiment of this application is shown.

[0025] Figure 2 It shows Figure 1 A sectional view of the provided wind turbine assembly.

[0026] Figure 3 The diagram shows a noise comparison at the air outlet after a silencing cavity is provided in the receiving cavity according to an embodiment of this application.

[0027] Figure 4 A schematic diagram of the structure of a wind turbine assembly provided in another embodiment of this application is shown.

[0028] Figure 5 It shows Figure 4 A sectional view of the provided wind turbine assembly.

[0029] Reference numerals: 100-fan assembly; 110-casing; 112-receiving cavity; 113-air inlet; 114-air outlet; 115-silencing cavity; 115a-bottom wall; 115b-opening; 120-wind wheel. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] It should be noted that all directional indications in the embodiments of this utility model are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indication will also change accordingly. In this utility model, unless otherwise explicitly specified and limited, the terms "connection" and "fixed" should be interpreted broadly. For example, "fixed" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction relationship between two components, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances. In addition, the descriptions involving "first," "second," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0032] Fan assemblies are widely used in electrical equipment, especially in cleaning equipment. They primarily function to rapidly circulate air within electrical equipment, creating negative pressure to achieve cleaning. However, in related technologies, fan assemblies often exhibit excessive noise during operation due to factors such as high wind speeds or abnormal impeller noise. The fan assembly and cleaning equipment provided in this application can mitigate these problems to some extent. The fan assembly, cleaning equipment, and cleaning system provided in this application can reduce noise during operation, minimizing its impact on users.

[0033] This application is described below with reference to the accompanying drawings and specific embodiments:

[0034] Please refer to the following: Figure 1 and Figure 2This application provides a fan assembly 100, which can reduce the noise of the fan assembly 100 during operation and improve the user experience.

[0035] In this embodiment of the application, the fan assembly 100 includes: a housing 110 and a fan wheel 120. The housing 110 has a receiving cavity 112 and an air inlet 113 and an air outlet 114 communicating with the receiving cavity 112. The fan wheel 120 is disposed in the receiving cavity 112. The housing 110 is provided with a silencing cavity 115 communicating with the receiving cavity 112. The silencing cavity 115 is located between the fan wheel 120 and the air outlet 114, and the depth direction of the silencing cavity 115 is set at an angle to the air outlet direction of the air outlet 114 to reduce noise.

[0036] The housing 110 is the main body of the entire fan assembly 100. The housing 110 provides the mounting base for the impeller 120 and other structures of the fan assembly 100. The impeller 120 and other components can be installed in the housing 112, which can play a certain protective role for the impeller 120 and other structures of the fan assembly 100, and reduce damage to the impeller 120 and other structures by external dust, particles and other impurities.

[0037] The air inlet 113 includes multiple inlets, which are arranged in a ring shape on the housing 110. The total area of ​​the multiple air inlets 113 is equal to the air intake area of ​​the entire fan assembly 100. Given the same air intake area, compared to a single large air inlet, multiple smaller air inlets 113 can pre-divide the gas into multiple streams, reducing noise generated by gas convergence and thus lowering the noise level.

[0038] In some embodiments, the distance between the silencing cavity 115 and the air outlet 114 is less than the distance between the silencing cavity 115 and the air inlet 113. Since the gas flows from the air inlet 113 to the air outlet 114, the silencing cavity 115 is positioned close to the air outlet 114 to minimize noise in the gas flowing out of the air outlet 114 and reduce the spread of noise 114 from the air outlet 114 to the outside.

[0039] In some embodiments, the outer end face of the air outlet 114 is not parallel to the outer end face of the air inlet 113, so that the air duct between the air inlet 113 and the air outlet 114 has a certain angle, which can increase the flow path of gas in the housing 110 and also reduce noise to a certain extent.

[0040] Both the air inlet 113 and the air outlet 114 are connected to the receiving cavity 112. During the operation of the impeller 120, external air enters the receiving cavity 112 from the air inlet 113 and is discharged from the air outlet 114, forming an air duct for air flow in the area between the air inlet 113 and the air outlet 114. Since the air flow or the operation of the impeller 120 will generate noise during operation, the noise will also spread to the outside from the air outlet 114, resulting in a large noise level in the cleaning equipment during operation, which affects the user's experience.

[0041] In this embodiment, a silencing cavity 115 is provided between the impeller 120 and the air outlet 114. The depth direction of the silencing cavity 115 is set at an angle to the air outlet 114, that is, the depth direction of the silencing cavity 115 is set at an angle to the direction of the air duct in the receiving cavity 112. When noise propagates to the receiving cavity 112, it will diffuse into the receiving cavity 112 and move to the bottom wall 115a of the receiving cavity 112 before being reflected. Finally, it returns to the air duct and superimposes with the noise in the air duct, thereby achieving the purpose of silencing and reducing the noise volume from the air outlet 114 to a certain extent.

[0042] It should be noted that the silencing cavity 115 can play a certain role in noise reduction. The depth of the silencing cavity 115 is related to the wavelength of the noise. When the phase of the noise reflected from the silencing cavity 115 is in opposite half-waves to the phase of the noise in the silencing cavity 115 in the air duct, the reflected noise and the noise in the air duct can be superimposed to reduce the volume of the noise at the air outlet 114 to a certain extent.

[0043] The angle between the depth direction of the silencing cavity 115 and the air outlet direction of the air outlet 114 is in the range of (0°-180°), specifically it can be 30°, 45°, 90°, 135°, 150°, etc.

[0044] The bottom wall 115a of the silencing cavity 115 refers to the wall opposite to the opening 115b of the silencing cavity 115, and is not the wall at the bottom of the silencing cavity 115 when the fan assembly 100 is in operation.

[0045] Since the model of the impeller 120, the size of the housing 110, the installation position of the impeller 120 in the housing 110, and the models and installation positions of other parts of the fan assembly 100 on the housing 110 are all determined at the time of manufacture, the frequency of the noise of the fan assembly 100 during operation is also roughly determined. Therefore, the depth of the silencing cavity 115 can be set according to the frequency of the noise, thereby reducing the volume of the noise flowing out from the air outlet 114.

[0046] In some embodiments, the depth of the silencing cavity 115 is set according to the following formula:

[0047] ;

[0048] Where f is the frequency of the noise, c is the speed of sound of the noise, l is the depth of the silencing cavity 115, and n is zero or a positive integer.

[0049] By transforming the above formula, we can obtain... In this equation, the speed of sound divided by the frequency of the noise equals the wavelength of the noise, where n is 0 or a positive integer. That is, the length of the silencing cavity 115 is an odd multiple of a quarter wavelength of the noise. Therefore, the depth of the silencing cavity 115 can be considered to be related to a quarter wavelength of the noise, and the silencing cavity 115 can be considered to be a quarter wavelength tube. When the noise in the receiving cavity 112 enters the silencing cavity 115, it is reflected by the silencing cavity 115 and then propagates again to the connection between the silencing cavity 115 and the receiving cavity 112. The travel length of this noise is exactly half a wavelength, and there is a 180-degree phase difference between it and the noise in the receiving cavity 112. They can interfere with each other, so that the volume of the noise can be attenuated, thereby reducing the volume of the noise and improving the user experience.

[0050] In other words, in some embodiments, the depth of the silencing cavity 115 is set to an odd multiple of a quarter wavelength of the noise, so that the noise reflected by the silencing cavity 115 has a 180-degree phase difference with the noise in the receiving cavity 112. The two can interfere with each other after being superimposed, thereby achieving the purpose of noise reduction.

[0051] like Figure 3 As shown, the horizontal axis represents the frequency of the noise, and the vertical axis represents the volume of the noise. Figure 3 As can be seen, the frequency of the noise is not a single point value, but a frequency band, and the depth of the silencing cavity 115 at this frequency corresponds to the frequency setting at point A in the diagram. Figure 3 The "central state" refers to the noise volume without the silencing cavity 115. Adding the silencing cavity 115 means that after the silencing cavity 115 is installed inside the housing 110, the noise volume, as shown at point B, is reduced compared to point A. Figure 3 It can be seen that after setting the silencing cavity 115, the volume of the corresponding frequency can be reduced adaptively, which can improve the user experience.

[0052] It should be noted that, during the operation of the fan assembly 100, the noise frequency is often not a single point value but a frequency band. Within this frequency band, there may be several specific frequencies that are particularly high or loud. When setting the depth of the silencing cavity 115, it can be set according to the wavelength of the specific noise frequencies, thus eliminating those specific frequencies. Alternatively, the silencing cavity 115 can be configured as a variable silencing cavity, so that its depth corresponds to all noise frequencies within the frequency band, thereby reducing the noise generated by the fan assembly 100 during operation and improving the user experience.

[0053] In some embodiments, the air inlet 113 and the air outlet 114 are respectively disposed at both ends of the housing 110, and the silencing cavity 115 is disposed on the side wall of the housing 110, with the depth direction of the silencing cavity 115 perpendicular to the air outlet direction of the air outlet 114.

[0054] The housing 110 is generally elongated, with the two ends referring to the two ends along its length, and the sidewalls referring to all walls except the two ends. The air inlet 113 and air outlet 114 are located at the two ends of the housing 110, respectively. The elongated air duct within the housing 110 allows for better gas collection, increasing the gas flow rate within the fan assembly 100 and thus improving the working efficiency of the fan assembly 100.

[0055] The noise-absorbing cavity 115 is disposed on the side wall of the housing 110 and extends away from the receiving cavity 112. The direction of noise movement in the noise-absorbing cavity 115 is set at an angle to the direction of noise movement in the housing 110. That is, the direction of noise movement in the housing 110 is different from the direction of noise movement in the noise-absorbing cavity 115. This allows the noise to be reflected by the noise-absorbing cavity 115 and overlap with the noise in the housing 110, thereby interfering with each other and weakening the noise to improve the user experience.

[0056] Specifically, the depth direction of the silencing cavity 115 is perpendicular to the air outlet direction of the air outlet 114. When noise moves from the housing 110 into the silencing cavity 115, the movement path in the silencing cavity 115 is the shortest, allowing the noise to quickly return to the receiving cavity 112 and overlap with the noise in the housing 110, thus interfering with each other and weakening the noise to improve the user experience.

[0057] In some embodiments, there are multiple silencing cavities 115, which are spaced apart.

[0058] The extension directions of the multiple silencing cavities 115 can be the same or different, and can be set according to the space inside the accommodating cavity 112, the arrangement position of the impeller 120, the relative position between the air outlet 114 and the impeller 120, etc.

[0059] The spacing between two adjacent silencing chambers 115 can be the same or different, depending on the layout structure of the entire fan assembly 100.

[0060] Similarly, the shapes of the multiple silencing cavities 115 can be the same or different. The shapes of the multiple silencing cavities 115 can all be the same, or the shapes of the multiple silencing cavities 115 can all be different. Alternatively, some of the silencing cavities 115 can have the same shape, while some of the silencing cavities 115 can have different shapes.

[0061] In addition, regarding the length of the multiple silencing cavities 115, similarly, the multiple silencing cavities 115 can have the same length, or the multiple silencing cavities 115 can have different lengths, or some of the silencing cavities 115 can have the same length and some of the silencing cavities 115 can have different lengths.

[0062] In some embodiments, the depth of the silencing cavity 115 is the same in the direction from the air inlet 113 to the air outlet 114.

[0063] The direction from the air inlet 113 to the air outlet 114 refers to the direction of gas flow inside the housing 110. If the depth of the silencing cavity 115 is the same in the airflow direction, it means that the silencing cavity 115 can only weaken noise of one frequency. As for which frequency of noise the depth of the silencing cavity 115 corresponds to, it can be the noise with the highest frequency in the noise band, or it can be the frequency of the noise with the highest volume.

[0064] The silencing cavities 115 have the same depth. This can mean that the depth is the same at all locations of the same silencing cavity 115, or that the depth is the same for multiple silencing cavities 115.

[0065] In some embodiments, the depth of the silencing cavity 115 decreases sequentially in the direction from the air inlet 113 to the air outlet 114.

[0066] The depth of the silencing cavity 115 decreases sequentially from the air inlet 113 toward the air outlet 114. As the depth of the silencing cavity 115 changes, the frequency of the corresponding noise also changes. This allows the silencing cavity 115 to weaken frequencies that cover the entire frequency band of noise generated by the fan assembly 100 during operation, thereby weakening noise across the entire frequency band and reducing the noise volume at the air outlet 114, thus improving the user experience.

[0067] The decreasing depth of the silencing cavity 115 can mean that the depth of the same silencing cavity decreases sequentially in the direction from the air inlet 113 to the air outlet 114, or it can mean that among multiple silencing cavities 115, the depth of the multiple silencing cavities 115 decreases sequentially in the direction from the air inlet 113 to the air outlet 114. For one of the silencing cavities 115, the depth of a single silencing cavity 115 can be the same everywhere, or the depth can decrease sequentially in the direction from the air inlet 113 to the air outlet 114.

[0068] In some other embodiments, at least two silencing cavities 115 have different depths in the direction from the air inlet 113 to the air outlet 114.

[0069] The depth of the anechoic cavity 115 is related to a quarter wavelength of the noise. A depth of anechoic cavity 115 can weaken noise at one frequency. If at least two anechoic cavities 115 have different depths, it means that at least two or more noise frequencies can be weakened. Within the entire noise frequency band, there may be several noises with relatively high volume or frequency. When the depth of the anechoic cavity 115 can be set to multiple different depths, it can be set to an odd multiple of a quarter wavelength of the loudest noise, or an odd multiple of a quarter wavelength of the loudest noise, or it can be set according to actual needs.

[0070] In some embodiments, the silencing cavity 115 has an opening 115b communicating with the receiving cavity 112, and along the depth direction of the silencing cavity 115, the projected area of ​​the silencing cavity 115 at the opening 115b is less than or equal to the cross-sectional area of ​​the receiving cavity 112 at the opening 115b.

[0071] The projected area of ​​the silencing cavity 115 at the opening 115b refers to the projected area of ​​the silencing cavity 115 on the side wall of the housing 110, while the cross-sectional area of ​​the receiving cavity 112 at the opening 115b refers to the cross-sectional area of ​​the receiving cavity 112 portion at the opening 115b in a plane perpendicular to the air outlet direction. The statement that the projected area of ​​the silencing cavity 115 at the opening 115b is less than or equal to the cross-sectional area of ​​the receiving cavity 112 at the opening 115b means that the projected area of ​​the silencing cavity 115 at the opening 115b is equal to or can be infinitely close to the cross-sectional area of ​​the receiving cavity 112 at the opening 115b. The volume reduction effect of the silencing cavity 115 is related to the projected area of ​​the silencing cavity 115 at the opening 115b and the cross-sectional area of ​​the receiving cavity 112 at the opening 115b. When the projected area of ​​the silencing cavity 115 at the opening 115b is equal to the cross-sectional area of ​​the receiving cavity 112 at the opening 115b, the silencing cavity 115 can basically eliminate noise of the corresponding frequency. The closer the projected area of ​​the silencing cavity 115 at the opening 115b is to the cross-sectional area of ​​the receiving cavity 112 at the opening 115b, the better the silencing effect.

[0072] In some embodiments, along the depth direction of the silencing cavity 115, the ratio of the projected area of ​​the silencing cavity 115 at the opening 115b to the cross-sectional area of ​​the receiving cavity 112 at the opening 115b is [0.8-1]. Therefore, it can be considered that the projected area of ​​the silencing cavity 115 at the opening 115b is equal to or can be infinitely close to the cross-sectional area of ​​the receiving cavity 112 at the opening 115b. In this case, the silencing effect of the silencing cavity is better.

[0073] The shape of the silencing cavity 115 is not specifically limited; it can be rectangular, circular, trapezoidal, or irregular. Similarly, the length of the silencing cavity 115 is also not specifically limited and can be set according to the space inside the accommodating cavity 112, the distance and relative position between the air outlet 114 and the impeller 120.

[0074] For example, when the silencing cavity 115 is elongated, its length can be arranged along the direction of the impeller 120 near the air outlet 114, or its width can be arranged along the direction of the impeller 120 near the air outlet 114. Alternatively, the length of the silencing cavity 115 can be arranged at an angle to the direction of the impeller 120 near the air outlet 114.

[0075] In some embodiments, the depths of any two silencing cavities 115 may be the same or different.

[0076] Any two silencing cavities 115 may have the same or different depths. Multiple silencing cavities 115 may have the same depth, or all silencing cavities 115 may have different depths. Alternatively, some silencing cavities 115 may have the same depth, while others may have different depths. In other words, multiple silencing cavities 115 may have different depths.

[0077] During the operation of the fan assembly 100, the frequency of the noise of the fan assembly 100 is not a point value but a frequency band. The multiple silencing chambers 115 are set with different depths to correspond to multiple frequencies in the noise, which can weaken multiple frequencies of noise and improve the silencing effect.

[0078] As described above, along the depth direction of the silencing cavity 115, the projected area of ​​the silencing cavity 115 at the opening 115b is less than or equal to the cross-sectional area of ​​the receiving cavity 112 at the opening 115b. If there are multiple silencing cavities 115, and the depths of the multiple silencing cavities 115 are the same, the sum of the projected areas of the multiple silencing cavities 115 at the opening 115b can be less than or equal to the cross-sectional area of ​​the receiving cavity 112 at the opening 115b.

[0079] In some embodiments, in the direction from the air inlet 113 to the air outlet 114, a plurality of silencing chambers 115 are arranged sequentially at intervals (e.g., Figure 1 and Figure 2 (as shown) or arranged side by side (such as) Figure 4 and Figure 5 (As shown).

[0080] Since the silencing cavity 115 is located between the impeller 120 and the air outlet 114, in the direction from the air inlet 113 to the air outlet 114, which is also the direction from the impeller 120 to the air outlet 114, the multiple silencing cavities 115 are arranged alternately in sequence, which means that the multiple silencing cavities 115 are arranged overlappingly in sequence in the direction from the air inlet 113 to the air outlet 114. The multiple silencing cavities 115 are arranged side by side, which means that the multiple extension directions are the same as the direction from the air inlet 113 to the air outlet 114.

[0081] For example, when the silencing cavity 115 is elongated, multiple silencing cavities 115 arranged sequentially at intervals means that the width direction of multiple silencing cavities 115 is along the direction from the air inlet 113 to the air outlet 114, and they are overlapped. Multiple silencing cavities 115 arranged side by side means that the length direction of the silencing cavities 115 is along the direction from the air inlet 113 to the air outlet 114.

[0082] The working principle of the fan assembly 100 provided in this application embodiment is as follows: In this application embodiment, during the rotation of the impeller 120, the noise will flow towards the air outlet 114 in the direction of the airflow. When the noise moves to the silencing cavity 115, it will move along the depth direction of the silencing cavity 115 and after being reflected by the bottom wall 115a of the silencing cavity 115, it will generate a 180-degree phase difference with the noise in the receiving cavity 112. After superposition, they can interfere with each other.

[0083] In summary, the fan assembly 100 provided in this application embodiment has a silencing cavity 115 between the impeller 120 and the air outlet 114. The depth direction of the silencing cavity 115 is set at an angle to the air outlet 114, that is, the depth direction of the silencing cavity 115 is set at an angle to the direction of the air duct in the receiving cavity 112. When noise propagates to the receiving cavity 112, it will diffuse into the receiving cavity 112 and move to the bottom wall 115a of the receiving cavity 112 before being reflected, and finally return to the air duct, where it will be superimposed with the noise in the air duct, thereby achieving the purpose of silencing and reducing the noise volume from the air outlet 114 to a certain extent.

[0084] Based on the same inventive concept, this application also provides a cleaning device, including the fan assembly 100 of the main body described above, and the fan assembly 100 is connected to the main body.

[0085] The cleaning equipment can be a floor scrubber or a robot vacuum cleaner.

[0086] Based on the same inventive concept, this application also provides a cleaning system, which includes a base station and the cleaning equipment described above.

[0087] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0088] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0089] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A cleaning device, which is a floor scrubber or a sweeping robot; characterized in that, The cleaning equipment includes a main body and a fan assembly (100) connected to the main body. The fan assembly (100) includes: The housing (110) has a receiving cavity (112) and an air inlet (113) and an air outlet (114) communicating with the receiving cavity (112). A wind turbine (120) is disposed within the receiving cavity (112); The housing (110) is provided with a silencing cavity (115) that communicates with the receiving cavity (112); the silencing cavity (115) is located between the impeller (120) and the air outlet (114), and the angle between the depth direction of the silencing cavity (115) and the air outlet (114) is in the range of (0°-180°) to reduce noise.

2. The cleaning equipment according to claim 1, characterized in that, The air inlets (113) include multiple inlets, which are arranged in a ring shape on the housing (110).

3. The cleaning equipment according to claim 1, characterized in that, The air inlet (113) and the air outlet (114) are respectively located at both ends of the housing (110), and the silencing cavity (115) is located on the side wall of the housing (110). The depth direction of the silencing cavity (115) is perpendicular to the air outlet (114) direction.

4. The cleaning equipment according to any one of claims 1-3, characterized in that, There are multiple silencing chambers (115), and the multiple silencing chambers (115) are arranged at intervals.

5. The cleaning equipment according to claim 4, characterized in that, The multiple silencing cavities (115) extend in the same direction.

6. The cleaning equipment according to claim 4, characterized in that, The spacing between two adjacent silencing cavities (115) is the same.

7. The cleaning equipment according to claim 4, characterized in that, The multiple silencing cavities (115) are of the same length.

8. The cleaning equipment according to claim 4, characterized in that, The depths of any two of the silencing cavities (115) may be the same or different.

9. The cleaning equipment according to claim 4, characterized in that, In the direction from the air inlet (113) to the air outlet (114), a plurality of the silencing chambers (115) are arranged sequentially at intervals or side by side.

10. The cleaning equipment according to claim 4, characterized in that, The depth of the silencing cavity (115) is the same in the direction from the air inlet (113) to the air outlet (114).

11. The cleaning equipment according to claim 4, characterized in that, In the direction from the air inlet (113) to the air outlet (114), the depth of the silencing cavity (115) decreases sequentially.

12. The cleaning equipment according to claim 4, characterized in that, In the direction from the air inlet (113) to the air outlet (114), at least two of the silencing cavities (115) have different depths.

13. The cleaning equipment according to claim 3, characterized in that, The silencing cavity (115) has an opening (115b) communicating with the receiving cavity (112). Along the depth direction of the silencing cavity (115), the projected area of ​​the silencing cavity (115) at the opening (115b) is less than or equal to the cross-sectional area of ​​the receiving cavity (112) at the opening (115b).

14. The cleaning equipment according to claim 13, characterized in that, The ratio of the projected area of ​​the silencing cavity (115) at the opening (115b) to the cross-sectional area of ​​the receiving cavity (112) at the opening (115b) is [0.8-1].

15. The cleaning equipment according to claim 13, characterized in that, There are multiple silencing cavities (115), and the depth of the multiple silencing cavities (115) is the same. The sum of the projected areas of the multiple silencing cavities (115) at the opening (115b) is less than or equal to the cross-sectional area of ​​the receiving cavity (112) at the opening (115b).

16. The cleaning equipment according to any one of claims 1-3, characterized in that, The outer end face of the air outlet (114) is not parallel to the outer end face of the air inlet (113).

17. The cleaning equipment according to any one of claims 1-3, characterized in that, The depth of the silencing cavity (115) is set according to the following formula: ； Where f is the frequency of the noise, c is the speed of sound of the noise, l is the depth of the silencing cavity, and n is zero or a positive integer.

18. A cleaning system, characterized in that, Includes base stations and cleaning equipment as described in any one of claims 1-17.

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