Fan assembly, cleaning equipment and cleaning system

Abstract

The embodiment of the utility model provides a fan assembly, cleaning equipment and a cleaning system. The fan assembly comprises a shell and a wind wheel. The shell is provided with a containing cavity, an air inlet and an air outlet, the wind wheel is arranged in the accommodating cavity; a silencing cavity communicating with the containing cavity is formed in the shell and located between the wind wheel and the air outlet, and an included angle is formed between the depth direction of the silencing cavity and the air outlet direction of the air outlet.

Description

Technical Field

[0001] The present application belongs to the technical field of electrical equipment, and in particular, relates to a fan assembly, a cleaning device and a cleaning system. Background Art

[0002] Fan assemblies are widely used in electrical equipment, especially in cleaning equipment. Fan assemblies are mainly used to enable air to flow quickly in electrical equipment and form negative pressure in the cleaning equipment, thereby achieving the purpose of cleaning. In the related art, during the operation of the fan assembly, the fan assembly may produce a large amount of noise due to reasons such as excessive wind speed or abnormal noise from the wind wheel. Utility Model Content

[0003] The present application aims to at least improve the technical problem of the high noise of the fan assembly to a certain extent. To this end, the present application provides a fan assembly, a cleaning device and a cleaning system.

[0004] In a first aspect, an embodiment of the present application provides a fan assembly, comprising:

[0005] A housing having a receiving cavity and an air inlet and an air outlet communicated with the receiving cavity;

[0006] A wind wheel, arranged in the accommodating cavity;

[0007] Wherein, a silencer chamber connected to the accommodating chamber is provided in the shell, the silencer chamber is located between the wind wheel and the air outlet, and the depth direction of the silencer chamber is set at an angle with the air outlet direction of the air outlet to reduce noise.

[0008] A silencer chamber is arranged between the wind wheel and the air outlet, and the depth direction of the silencer chamber is arranged at an angle to the air outlet direction of the air outlet, that is, the depth direction of the silencer chamber is arranged at an angle to the direction of the air duct in the accommodating chamber. When the noise propagates to the accommodating chamber, it will diffuse into the accommodating chamber and move to the bottom wall of the accommodating chamber and then reflect, and finally return to the air duct and be superimposed with the noise in the air duct, thereby achieving the purpose of silencer and being able to reduce the noise volume from the air outlet to a certain extent.

[0009] In an optional embodiment of the present application, the air inlet and the air outlet are respectively arranged at two ends of the shell, the silencer cavity is arranged on the side wall of the shell, and the depth direction of the silencer cavity is perpendicular to the air outlet direction of the air outlet.

[0010] In an optional embodiment of the present application, there are multiple silencing chambers, and the multiple silencing chambers are arranged at intervals.

[0011] In an optional embodiment of the present application, the depths of any two of the silencing cavities are the same or different.

[0012] In an optional embodiment of the present application, in the direction from the air inlet to the air outlet, the plurality of silencing chambers are arranged in sequence at intervals or in parallel.

[0013] In an optional embodiment of the present application, the depth of the silencing cavity is the same in the direction from the air inlet toward the air outlet.

[0014] In an optional embodiment of the present application, the depth of the silencing cavity decreases successively in the direction from the air inlet toward the air outlet.

[0015] In an optional embodiment of the present application, in the direction from the air inlet to the air outlet, at least two of the silencing cavities have different depths.

[0016] In an optional embodiment of the present application, the silencing chamber has an opening connected to the accommodating chamber, and along the depth direction of the silencing chamber, the ratio of the projected area of ​​the silencing chamber at the opening to the cross-sectional area of ​​the accommodating chamber at the opening is [0.8-1].

[0017] In an optional embodiment of the present application, the depth of the silencing cavity is set according to the following formula:

[0018] f = (c / l)(2n+1) / 4;

[0019] Among them, 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.

[0020] In a second aspect, an embodiment of the present application provides a cleaning device, comprising a main body and the fan assembly provided in the first aspect, wherein the fan assembly is connected to the main body.

[0021] The beneficial effects of the cleaning device provided in the second aspect are the same as the beneficial effects of the cleaning device provided in the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A schematic structural diagram of a fan assembly provided in one of the embodiments of the present application is shown.

[0024] Figure 2 Shows Figure 1 A cross-sectional view of the blower assembly is provided.

[0025] Figure 3 A noise comparison diagram at the air outlet after a silencer cavity is provided in the accommodating cavity in an embodiment of the present application is shown.

[0026] Figure 4 A schematic structural diagram of a fan assembly provided in another embodiment of the present application is shown.

[0027] Figure 5 Shows Figure 4 A cross-sectional view of the blower assembly is provided.

[0028] Figure numerals: 100 - fan assembly; 110 - housing; 112 - accommodating chamber; 113 - air inlet; 114 - air outlet; 115 - silencer chamber; 115a - bottom wall; 115b - opening; 120 - wind wheel. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; 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 elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0033] Fan assemblies are widely used in electrical equipment, especially in cleaning equipment. Fan assemblies are mainly used to enable air to flow quickly in electrical equipment and form negative pressure in the cleaning equipment, thereby achieving the purpose of cleaning. In the related art, during the operation of the fan assembly, the fan assembly may produce a large amount of noise due to reasons such as excessive wind speed or abnormal noise from the wind wheel. The fan assembly and cleaning equipment provided in the embodiments of the present application can improve the above-mentioned problems to a certain extent. The fan assembly, cleaning equipment and cleaning system provided in the embodiments of the present application can reduce the noise of the fan assembly during operation and reduce the impact of the noise on the user.

[0034] The present application is described below with reference to the accompanying drawings and specific embodiments:

[0035] Please refer to Figure 1 and Figure 2 The embodiment of the present application provides a fan assembly 100. The fan assembly 100 provided by the embodiment of the present application can reduce the noise of the fan assembly 100 during operation and improve the user experience.

[0036] In the embodiment of the present application, the fan assembly 100 includes: a shell 110 and a wind wheel 120, the shell 110 has a accommodating chamber 112 and an air inlet 113 and an air outlet 114 connected to the accommodating chamber 112; the wind wheel 120 is arranged in the accommodating chamber 112; wherein, a silencer chamber 115 connected to the accommodating chamber 112 is arranged in the shell 110, the silencer chamber 115 is located between the wind wheel 120 and the air outlet 114, and the depth direction of the silencer chamber 115 is set at an angle to the air outlet direction of the air outlet 114 to reduce noise.

[0037] Among them, the shell 110 is the main body of the entire fan assembly 100. The shell 110 provides an installation basis for the wind wheel 120 and other structures of the fan assembly 100. The wind wheel 120 and other components can be installed in the accommodating cavity 112, which can play a certain protective role for the wind wheel 120 and other structures of the fan assembly 100, and reduce external dust, particles and other impurities from damaging the wind wheel 120 and other structures.

[0038] The air inlet 113 and the air outlet 114 are both connected to the accommodating chamber 112. When the wind wheel 120 is working, the external gas enters the accommodating chamber 112 from the air inlet 113 and is discharged from the air outlet 114, so that the area between the air inlet 113 and the air outlet 114 forms an air duct for gas flow. When the wind wheel 120 is working, the gas flow or the operation of the wind wheel 120 will generate noise, and the noise will also spread from the air outlet 114 to the outside, resulting in a louder noise in the cleaning equipment during operation, affecting the user experience.

[0039] In the embodiment of the present application, a silencer chamber 115 is arranged between the wind wheel 120 and the air outlet 114. The depth direction of the silencer chamber 115 is arranged at an angle to the air outlet direction of the air outlet 114, that is, the depth direction of the silencer chamber 115 is arranged at an angle to the direction of the air duct in the accommodating chamber 112. When the noise propagates to the accommodating chamber 112, it will diffuse into the accommodating chamber 112 and move to the bottom wall 115a of the accommodating chamber 112 and then reflect, and finally return to the air duct and be superimposed with the noise in the air duct, thereby achieving the purpose of silencing, and can reduce the noise volume from the air outlet 114 to a certain extent.

[0040] It should be noted that the silencer chamber 115 can play a certain degree of silencer effect. The depth of the silencer chamber 115 is related to the wavelength of the noise. When the phase of the noise reflected back from the silencer chamber 115 and the phase of the noise in the silencer chamber 115 in the air duct are in two opposite half-waves, the volume of the noise at the air outlet 114 can be weakened to a certain extent after the reflected noise is superimposed with the noise in the air duct.

[0041] The angle between the depth direction of the silencer cavity 115 and the air outlet direction of the air outlet 114 is in the range of (0°-180°), and can be specifically 30°, 45°, 90°, 135°, 150°, etc.

[0042] The bottom wall 115a of the silencer cavity 115 refers to the wall opposite to the opening 115b of the silencer cavity 115, and is not the wall at the bottom of the silencer cavity 115 when the fan assembly 100 is in the working state.

[0043] When the fan assembly 100 leaves the factory, the model of the wind wheel 120 has been determined, the size of the shell 110 has been determined, the installation position of the wind wheel 120 in the shell 110 has been determined, and the models of other parts of the fan assembly 100 and the installation positions on the shell 110 have been determined. Therefore, the frequency of the noise generated by the fan assembly 100 during operation is also roughly determined. The depth of the silencer chamber 115 can be set according to the frequency of the noise, so as to reduce the volume of the noise flowing out of the air outlet 114.

[0044] In some embodiments, the depth of the muffler cavity 115 is set according to the following formula:

[0045] f = (c / l)(2n+1) / 4;

[0046] Wherein, 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.

[0047] According to the above formula, l=(c / f)(2n+1) / 4 can be obtained by deformation; wherein, the speed of sound of the noise divided by the frequency of the noise is equal to the wavelength of the noise, and n is 0 or a positive integer, that is, the length of the silencing chamber 115 is equal to an odd multiple of one quarter wavelength of the noise. Then, the depth of the silencing chamber 115 can be considered to be related to one quarter wavelength of the noise. Then, the silencing chamber 115 can be considered to be a quarter wavelength tube. When the noise in the accommodating chamber 112 enters the silencing chamber 115, it is reflected by the silencing chamber 115 and then propagates again to the connection between the silencing chamber 115 and the accommodating chamber 112. Then, the running length of the noise is exactly half wavelength, and there is a phase difference of 180 degrees between the noise and the noise in the accommodating chamber 112. The noise 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.

[0048] That is to say, in some embodiments, the depth of the silencing cavity 115 is set to an odd multiple of one quarter wavelength of the noise, so that there is a 180-degree phase difference between the noise reflected by the silencing cavity 115 and the noise in the containing cavity 112. The two can interfere with each other after being superimposed, thereby achieving the purpose of noise reduction.

[0049] 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 It can be seen from the figure that the frequency of the noise is not a point value, but a frequency band, and the depth of the silencing cavity 115 in this frequency corresponds to the frequency setting at point A in the figure. Figure 3 The original state refers to the volume of the noise when the silencer cavity 115 is not provided, and the volume of the noise after the silencer cavity 115 is provided in the housing 110 is as shown in point B. Compared with point A, the noise is reduced. Figure 3 It can be seen that after the silencing cavity 115 is provided, the volume of the corresponding frequency can be adaptively reduced, which can improve the user experience.

[0050] It should be noted that, during the operation of the fan assembly 100, the frequency of the noise is often not a point value, but a frequency band, and in the frequency band of the noise there may be several specific frequencies of noise with particularly high frequencies or particularly loud volumes. When setting the depth of the silencer cavity 115, it can be set according to the wavelength of the noise of the specific frequency, and the noise of several specific frequencies can be eliminated. In addition, the silencer cavity 115 can also be set as a variable silencer cavity 115, so that the depth of the silencer cavity 115 can correspond to the frequencies of all noises in the frequency band, thereby weakening the noise generated by the fan assembly 100 during operation and improving the user experience.

[0051] In some embodiments, the air inlet 113 and the air outlet 114 are respectively disposed at two ends of the shell 110 , and the silencer cavity 115 is disposed on the side wall of the shell 110 , and the depth direction of the silencer cavity 115 is perpendicular to the air outlet direction of the air outlet 114 .

[0052] The housing 110 is generally in the shape of a long strip, and the two ends of the housing 110 refer to the two ends in the length direction of the housing 110, and the side walls of the housing 110 refer to all walls except the two ends. The air inlet 113 and the air outlet 114 are respectively located at the two ends of the housing 110, and the air duct of the gas in the housing 110 becomes longer, which can make the gas better gathered in the housing 110, increase the flow of the gas in the fan assembly 100, and improve the working effect of the fan assembly 100.

[0053] The silencer chamber 115 is arranged on the side wall of the shell 110 and extends in the direction away from the accommodating chamber 112. The movement direction of the noise in the silencer chamber 115 is arranged at an angle to the movement direction in the shell 110, that is, the movement direction of the noise in the shell 110 is different from the movement direction in the silencer chamber 115, so that the noise can overlap with the noise in the shell 110 after being reflected by the silencer chamber 115, thereby interfering with each other, thereby weakening the noise to improve the user experience.

[0054] Specifically, the depth direction of the silencer chamber 115 is perpendicular to the air outlet direction of the air outlet 114. When the noise moves from the shell 110 to the silencer chamber 115, the movement path in the silencer chamber 115 is the shortest, so that the noise can quickly return to the accommodating chamber 112 and overlap with the noise in the shell 110, thereby interfering with each other, thereby weakening the noise and improving the user experience.

[0055] In some embodiments, there are multiple silencing chambers 115, and the multiple silencing chambers 115 are arranged at intervals.

[0056] Among them, the extension directions of the multiple silencer chambers 115 can be the same or different, and can be set according to the space in the accommodating chamber 112, the layout position of the wind wheel 120, the relative position between the air outlet 114 and the wind wheel 120, etc.

[0057] The spacing distance between two adjacent silencer chambers 115 may be the same or different, and may be set according to the layout structure of the entire fan assembly 100 .

[0058] Similarly, the shapes of the multiple silencer cavities 115 may be the same or different. The shapes of the multiple silencer cavities 115 may be the same or different. The shapes of some silencer cavities 115 may be the same and some may be different.

[0059] In addition, as for the lengths of the multiple silencer cavities 115, similarly, the lengths of the multiple silencer cavities 115 can be the same, the lengths of the multiple silencer cavities 115 can be different, or the lengths of some silencer cavities 115 can be the same and the lengths of some silencer cavities 115 can be different.

[0060] 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 .

[0061] The direction from the air inlet 113 to the air outlet 114 refers to the direction of gas flow in the shell 110. In the direction of air flow, the depth of the silencer chamber 115 is the same, which means that the silencer chamber 115 can only weaken noise of one frequency. As for which frequency of noise the depth of the silencer chamber 115 corresponds to, it can be the noise with the largest frequency in the frequency band of the noise, or it can be the frequency of the noise with the loudest volume.

[0062] The depths of the silencing cavities 115 may be the same, and the depths of all positions of the same silencing cavity 115 may be the same, or the depths of multiple silencing cavities 115 may be the same.

[0063] In some embodiments, the depth of the silencing cavity 115 decreases in sequence from the air inlet 113 to the air outlet 114 .

[0064] The depth of the silencer chamber 115 decreases in the direction from the air inlet 113 to the air outlet 114. As the depth of the silencer chamber 115 changes, the frequency of the corresponding noise will also change, so that the frequency that can be weakened by the silencer chamber 115 can cover the entire frequency band of the noise generated by the fan assembly 100 during operation, thereby weakening the noise of the entire frequency band and reducing the noise volume at the air outlet 114, thereby improving the user experience.

[0065] Among them, the depth of the silencer chamber 115 decreases successively, which may refer to the depth of the same silencer chamber in the direction from the air inlet 113 to the air outlet 114 decreasing successively, or it may refer to that among multiple silencer chambers 115, the depth of multiple silencer chambers 115 decreases successively in the direction from the air inlet 113 to the air outlet 114. For one of the silencer chambers 115, the depth of a single silencer chamber 115 may be the same everywhere, or the depth may decrease successively in the direction from the air inlet 113 to the air outlet 114.

[0066] In some other embodiments, in the direction from the air inlet 113 to the air outlet 114 , at least two silencing cavities 115 have different depths.

[0067] The depth of the silencing chamber 115 is related to a quarter wavelength of the noise. One depth of the silencing chamber 115 can weaken noise of one frequency. If at least two silencing chambers 115 have different depths, it means that at least two or more frequencies of noise can be weakened. In the entire frequency band of the noise, there may be several noises with a large volume or a large frequency. When the depth of the silencing chamber 115 can be set to multiple different depths, the depth of the silencing chamber 115 can be set to an odd multiple of a quarter wavelength of the noise with the largest volume, or an odd multiple of a quarter wavelength of the noise with the largest frequency, and can also be set according to actual needs.

[0068] In some embodiments, the silencing chamber 115 has an opening 115b communicating with the accommodating chamber 112, and along the depth direction of the silencing chamber 115, the projection area of ​​the silencing chamber 115 at the opening 115b is less than or equal to the cross-sectional area of ​​the accommodating chamber 112 at the opening 115b.

[0069] The projection area of ​​the silencer cavity 115 at the opening 115b refers to the projection area of ​​the silencer cavity 115 on the side wall of the housing 110, and the cross-sectional area of ​​the accommodating cavity 112 at the opening 115b refers to the cross-sectional area of ​​the accommodating cavity 112 at the opening 115b in a plane perpendicular to the air outlet direction. The projection area of ​​the silencer cavity 115 at the opening 115b is less than or equal to the cross-sectional area of ​​the accommodating cavity 112 at the opening 115b, which means that the projection area of ​​the silencer cavity 115 at the opening 115b is equal to or can be infinitely close to the cross-sectional area of ​​the accommodating cavity 112 at the opening 115b. The volume that the silencer chamber 115 can attenuate is related to the projection area of ​​the silencer chamber 115 at the opening 115b and the cross-sectional area of ​​the accommodating chamber 112 at the opening 115b. When the projection area of ​​the silencer chamber 115 at the opening 115b is equal to the cross-sectional area of ​​the accommodating chamber 112 at the opening 115b, the silencer chamber 115 can basically eliminate the noise of the corresponding frequency. The closer the projection area of ​​the silencer chamber 115 at the opening 115b is to the cross-sectional area of ​​the accommodating chamber 112 at the opening 115b, the better the silencing effect is.

[0070] In some embodiments, along the depth direction of the silencer cavity 115, the ratio of the projection area of ​​the silencer cavity 115 at the opening 115b to the cross-sectional area of ​​the accommodating cavity 112 at the opening 115b is [0.8-1]. It can be considered that the projection area of ​​the silencer cavity 115 at the opening 115b is equal to or can be infinitely close to the cross-sectional area of ​​the accommodating cavity 112 at the opening 115b. At this time, the silencer cavity has a better soundproofing effect.

[0071] The shape of the silencer cavity 115 is not specifically limited, and may be rectangular, circular, trapezoidal, or irregular in shape, etc. Similarly, the length of the silencer cavity 115 is not specifically limited, and may be set according to the space in the accommodating cavity 112, the spacing between the air outlet 114 and the wind wheel 120, and the relative position.

[0072] For example, when the muffler chamber 115 is in the shape of a long strip, the length direction of the muffler chamber 115 may be arranged along the direction of the wind wheel 120 close to the air outlet 114, or the width direction of the muffler chamber 115 may be arranged along the direction of the wind wheel 120 close to the air outlet 114. In addition, the length direction of the muffler chamber 115 may be arranged at an angle to the direction of the wind wheel 120 close to the air outlet 114.

[0073] In some embodiments, the depths of any two silencing cavities 115 are the same or different.

[0074] The depths of any two silencing cavities 115 may be the same or different. The depths of multiple silencing cavities 115 may be the same, or the depths of all silencing cavities 115 may be different, or the depths of some silencing cavities 115 may be the same, and the depths of some silencing cavities 115 may be different. That is, the multiple silencing cavities 115 may have different depths.

[0075] 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 silencer chambers 115 are set at different depths to correspond to multiple frequencies in the noise, which can correspond to weakening multiple frequencies of the noise and improve the silencing effect.

[0076] In the foregoing, 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 accommodating cavity 112 at the opening 115b. When 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 may be less than or equal to the cross-sectional area of ​​the accommodating cavity 112 at the opening 115b.

[0077] In some embodiments, in the direction from the air inlet 113 to the air outlet 114, a plurality of silencer chambers 115 are sequentially arranged at intervals (eg, Figure 1 and Figure 2 as shown) or side-by-side (as shown Figure 4 and Figure 5 shown).

[0078] Among them, since the silencer chamber 115 is arranged between the wind wheel 120 and the air outlet 114, in the direction from the air inlet 113 to the air outlet 114, it is actually also in the direction from the wind wheel 120 to the air outlet 114. The multiple silencer chambers 115 are arranged in sequence at intervals, which means that the multiple silencer chambers 115 are overlapped in sequence in the direction from the air inlet 113 to the air outlet 114, and the multiple silencer chambers 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.

[0079] For example, when the shape of the muffler cavity 115 is a long strip, the multiple muffler cavities 115 are arranged in sequence at intervals, which means that the width direction of the multiple muffler cavities 115 is along the direction from the air inlet 113 to the air outlet 114, and they are arranged overlappingly. The multiple muffler cavities 115 are arranged side by side, which means that the length direction of the muffler cavities 115 is along the direction from the air inlet 113 to the air outlet 114.

[0080] The working principle of the fan assembly 100 provided in the embodiment of the present application: In the embodiment of the present application, during the rotation of the wind wheel 120, the noise will flow toward the air outlet 114 in the direction of the airflow at any time. When the noise moves to the silencer chamber 115, it will move along the depth direction of the silencer chamber 115, and after being reflected by the bottom wall 115a of the silencer chamber 115, it will produce a phase difference of 180 degrees with the noise in the accommodating chamber 112, and can interfere with each other after superposition.

[0081] To summarize, in the fan assembly 100 provided in the embodiment of the present application, a silencer chamber 115 is arranged between the wind wheel 120 and the air outlet 114, and the depth direction of the silencer chamber 115 is arranged at an angle with the air outlet direction of the air outlet 114, that is, the depth direction of the silencer chamber 115 is arranged at an angle with the direction of the air duct in the accommodating chamber 112. When the noise propagates to the accommodating chamber 112, it will diffuse into the accommodating chamber 112 and move to the bottom wall 115a of the accommodating chamber 112 and then reflect, and finally return to the air duct and be superimposed with the noise in the air duct, thereby achieving the purpose of silencing, and can reduce the noise volume from the air outlet 114 to a certain extent.

[0082] Based on the same inventive concept, an embodiment of the present application further provides a cleaning device, including the fan assembly 100 mentioned above in the main body, and the fan assembly 100 is connected to the main body.

[0083] Among them, the cleaning equipment can be a floor scrubber or a sweeping robot.

[0084] Based on the same inventive concept, an embodiment of the present application further provides a cleaning system, which includes a base station and the above-mentioned cleaning device.

[0085] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0086] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0087] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A fan assembly, characterized in that: include: A housing (110) having a receiving chamber (112) and an air inlet (113) and an air outlet (114) communicated with the receiving chamber (112); A wind wheel (120) is arranged in the accommodating cavity (112); A silencer chamber (115) connected to the accommodating chamber (112) is provided in the shell (110); the silencer chamber (115) is located between the wind wheel (120) and the air outlet (114); and the depth direction of the silencer chamber (115) is arranged at an angle to the air outlet direction of the air outlet (114) to reduce noise.

2. The fan assembly according to claim 1, characterized in that: The air inlet (113) and the air outlet (114) are respectively arranged at two ends of the shell (110), the silencer cavity (115) is arranged on a side wall of the shell (110), and the depth direction of the silencer cavity (115) is perpendicular to the air outlet direction of the air outlet (114).

3. The fan assembly according to claim 1, characterized in that: There are a plurality of silencing cavities (115), and the plurality of silencing cavities (115) are arranged at intervals.

4. The fan assembly according to claim 3, characterized in that: The depths of any two of the muffler cavities (115) are the same or different.

5. The fan assembly according to claim 3, characterized in that: In the direction from the air inlet (113) toward the air outlet (114), the plurality of silencing chambers (115) are arranged in sequence at intervals or in parallel.

6. The fan assembly according to claim 3, characterized in that: In the direction from the air inlet (113) to the air outlet (114), the depth of the silencing cavity (115) is the same.

7. The fan assembly according to claim 3, characterized in that: In the direction from the air inlet (113) to the air outlet (114), the depth of the silencing cavity (115) decreases successively.

8. The fan assembly according to claim 3, characterized in that: In the direction from the air inlet (113) toward the air outlet (114), at least two of the silencing cavities (115) have different depths.

9. The fan assembly according to claim 2, characterized in that: The muffler cavity (115) has an opening (115b) communicating with the accommodating cavity (112); along the depth direction of the muffler cavity (115), the ratio of the projected area of ​​the muffler cavity (115) at the opening (115b) to the cross-sectional area of ​​the accommodating cavity (112) at the opening (115b) is [0.8-1].

10. The fan assembly according to any one of claims 1 to 9, characterized in that: The depth of the muffler cavity (115) is set according to the following formula: f = (c / l)(2n+1) / 4; Where f is the frequency of the noise, c is the speed of sound of the noise, l is the depth of the anechoic cavity, and n is zero or a positive integer.

11. A cleaning device, characterized in that: It comprises a main body and a fan assembly (100) according to any one of claims 1 to 10, wherein the fan assembly (100) is connected to the main body.

12. A cleaning system, characterized in that: It comprises a base station and the cleaning device as claimed in claim 11.

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