Cleaning equipment and cleaning system

Abstract

The utility model discloses cleaning equipment and a cleaning system, and belongs to the technical field of electrical equipment. The cleaning equipment comprises a main body and a fan assembly mounted on the main body; the water tank is mounted on the main body, an air duct and a first air outlet and a first air inlet communicated with the air duct are formed between the water tank and the main body, and the first air inlet is communicated with the second air outlet of the fan assembly; and a silencer is arranged in the air duct so as to weaken the noise of the first air outlet. The silencer is arranged in the air duct, noise can be further eliminated after passing through the silencing cavity in the process of flowing along with air, the noise diffused to the outside can be reduced, and the noise reduction effect is further achieved.

Description

Technical Field

[0001] The present application belongs to the technical field of electrical equipment, and in particular, relates to 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 solve the technical problem of high noise at least to a certain extent. To this end, the present application provides a cleaning device and a cleaning system.

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

[0005] A main body and a fan assembly mounted on the main body;

[0006] A water tank is installed on the main body and forms an air duct with the main body and a first air outlet and a first air inlet connected to the air duct, wherein the first air inlet and the air duct are connected to the second air outlet of the fan assembly;

[0007] Wherein, a muffler is arranged in the air duct to reduce noise.

[0008] In the embodiment of the present application, the fan assembly can provide adsorption force for the cleaning equipment during the cleaning process, can absorb impurities, and thus achieve the purpose of cleaning. During the operation of the fan assembly, a large noise will be generated, and the noise will also diffuse to the outside with the airflow. If the noise is too loud, it will affect the user experience. Forming an air duct between the water tank and the main body can increase the flow path of the noise of the fan assembly in the entire cleaning equipment, which can achieve a certain noise reduction effect. A muffler is arranged in the air duct, which can further eliminate the noise after passing through the muffler during the process of the noise flowing with the gas, and can reduce the noise diffused to the outside, further achieving the effect of noise reduction.

[0009] In an optional embodiment of the present application, a retaining rib is provided on the water tank, the retaining rib is in contact with the main body, and the retaining rib, the main body and the water tank form the air duct and the muffler.

[0010] In an optional embodiment of the present application, the silencer includes a silencer cavity, and a depth direction of the silencer cavity is arranged at an angle with an air outlet direction of the air duct.

[0011] In an optional embodiment of the present application, the silencing chamber is connected to the air duct via a connecting port, and in the air outlet direction of the air duct, the length of the connecting port is smaller than the length of the silencing chamber.

[0012] In an optional embodiment of the present application, there are multiple connecting openings, and the multiple connecting openings are arranged in sequence along the air outlet direction of the air duct.

[0013] In an optional embodiment of the present application, along the air outlet direction of the air duct, the length of the connecting port is the same as the length of the silencing cavity.

[0014] In an optional embodiment of the present application, there are multiple silencer chambers, and the multiple silencer chambers are arranged in sequence at intervals along the air outlet direction of the air duct.

[0015] In an optional embodiment of the present application, the depths of the multiple silencing cavities are the same or different.

[0016] In an optional embodiment of the present application, the depth of the silencing cavity is related to the frequency of the noise in the air duct.

[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 1)(2n+1) / 4;

[0019] Among them, f is the frequency of the noise, c is the speed of sound of the noise, l1 is the depth of the silencing cavity, and n is a positive integer.

[0020] In an optional embodiment of the present application, the silencing chamber is provided on both sides of the air duct.

[0021] In an optional embodiment of the present application, the muffler is also arranged at the first air outlet or the first air inlet.

[0022] In an optional embodiment of the present application, a projection of the first air outlet in the air outlet direction of the air duct is located within a projection of the air duct along the air outlet direction of the air duct.

[0023] In an optional embodiment of the present application, the air duct has a first air segment and a second air segment, the first air segment is connected to the first air inlet, the second air segment is connected to the first air outlet, and the width of the first air segment is smaller than the width of the second air segment.

[0024] In an optional embodiment of the present application, the fan assembly includes:

[0025] A housing having a receiving cavity and a second air inlet and a second air outlet communicated with the receiving cavity;

[0026] A wind wheel, arranged in the accommodating cavity;

[0027] Wherein, a noise reduction chamber connected to the accommodating chamber is provided in the shell, the noise reduction chamber is located between the wind wheel and the second air outlet, and the depth direction of the noise reduction chamber is set at an angle with the air outlet direction of the second air outlet to reduce noise.

[0028] In a second aspect, an embodiment of the present application provides a cleaning system, comprising a base station and the cleaning device provided in the first aspect.

[0029] The beneficial effects of the cleaning system 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

[0030] 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.

[0031] Figure 1 A schematic structural diagram of a cleaning device provided in an embodiment of the present application is shown.

[0032] Figure 2 A cross-sectional view of a cleaning device provided in an embodiment of the present application is shown.

[0033] Figure 3 A schematic diagram of the structure in which a silencing chamber of a cleaning device provided in an embodiment of the present application is arranged on a water tank is shown.

[0034] Figure 4 Shows Figure 3 Axonometric drawing of .

[0035] Figure 5 A schematic structural diagram showing a cleaning device provided in an embodiment of the present application having a plurality of connecting openings in the silencing chamber.

[0036] Figure 6 Shows Figure 5 Axonometric drawing of .

[0037] Figure 7 A schematic structural diagram showing a cleaning device provided in an embodiment of the present application having multiple silencing chambers.

[0038] Figure 8 Shows Figure 7 Axonometric drawing of .

[0039] Fig. 9 A schematic structural diagram showing a cleaning device provided in an embodiment of the present application having multiple silencing chambers.

[0040] Fig.10 Shows Fig. 9 Axonometric drawing of .

[0041] Fig.11 A schematic structural diagram of a fan assembly provided in one of the embodiments of the present application is shown.

[0042] Fig.12 Shows Fig.11 A cross-sectional view of the blower assembly is provided.

[0043] Fig.13 A noise comparison diagram at the second air outlet after a noise reduction chamber is provided in the accommodating chamber is shown.

[0044] Fig.14 A schematic structural diagram of a fan assembly provided in another embodiment of the present application is shown.

[0045] Fig.15 Shows Fig.14 A cross-sectional view of the blower assembly is provided.

[0046] Figure markings: 10-cleaning equipment, 100-fan assembly, 110-shell, 112-accommodating chamber, 113-second air inlet, 114-second air outlet, 115-noise reduction chamber, 115a-bottom wall, 115b-opening, 120-wind wheel, 200-main body, 300-water tank, 410-air duct, 412-first air section, 413-second air section, 420-first air inlet, 430-first air outlet, 500-silencer, 510-rib, 520-silence chamber, 530-connecting port. DETAILED DESCRIPTION

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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 make a lot 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 problems to a certain extent. The cleaning equipment 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.

[0052] The present application is described below with reference to the accompanying drawings and specific embodiments:

[0053] See also Figure 1 and Figure 2 The embodiment of the present application provides a cleaning device 10. The cleaning device 10 provided by the embodiment of the present application can reduce noise during the working process and improve the user experience.

[0054] In an embodiment of the present application, the cleaning device 10 includes a main body 200, a fan assembly 100 installed on the main body 200, and a water tank 300. The water tank 300 is installed on the main body 200 and forms an air duct 410 with the main body 200. The air duct 410 is connected to the fan assembly 100; wherein a silencer chamber 520 is provided in the air duct 410 to reduce noise.

[0055] The main body 200 is the main structure of the entire cleaning device 10. The main body 200 provides an installation basis for structures such as the fan assembly 100 and the water tank 300. The fan assembly 100, the water tank 300 and other structures can be installed on the main body 200, so that the entire cleaning device 10 can form a whole, which can facilitate the use of the entire cleaning device 10.

[0056] Among them, the water tank 300 can be a sewage tank 300 or a clean water tank 300, that is, an air duct 410 can be formed between the sewage tank 300 and the main body 200, or an air duct 410 can be formed between the clean water tank 300 and the main body 200, or both the sewage tank 300 and the clean water tank 300 form an air duct 410 with the main body 200.

[0057] If the sewage tank 300 and the clean water tank 300 both form an air duct 410 with the main body 200, the sewage tank 300 can be arranged side by side with the clean water tank 300, and the air duct 410 can be arranged as a curved channel. In addition, the sewage tank 300 and the clean water tank 300 can also be arranged up and down, that is, the sewage tank 300 is arranged above the clean water tank 300, or is arranged below the clean water tank 300, and the air duct 410 can be arranged in a long strip shape, or can be arranged as a curved channel, and there is no limitation.

[0058] In the embodiment of the present application, the fan assembly 100 can provide adsorption force for the cleaning device 10 during the cleaning process, can absorb impurities, and thus achieve the purpose of cleaning. During the operation of the fan assembly 100, a large noise will be generated, and the noise will also spread to the outside with the airflow. If the noise is too loud, it will affect the user's experience. An air duct 410 is formed between the water tank 300 and the main body 200, which can increase the flow path of the noise of the fan assembly 100 in the entire cleaning device 10, and can achieve a certain noise reduction effect. A muffler 500 is set in the air duct 410, and the noise can be further eliminated after passing through the muffler 500 during the process of the noise flowing with the gas, which can reduce the noise diffused to the outside, and further achieve the effect of noise reduction.

[0059] Since the air duct 410 is formed by the gap between the main body 200 and the water tank 300, setting the silencer 500 in the air duct 410 can utilize the narrow space between the main body 200 and the water tank 300 for silence, does not occupy other space, and can minimize the increase in the volume of the cleaning device 10 while silencing.

[0060] See also Figure 3 and Figure 4 In some embodiments, a retaining rib 510 is disposed on the water tank 300 , and the retaining rib 510 is in contact with the main body 200 . The retaining rib 510 , the main body 200 , and the water tank 300 form an air duct 410 and a muffler 500 .

[0061] After the retaining rib 510 contacts the main body 200, a certain distance is created between the water tank 300 and the main body 200, that is, a certain gap is created between the water tank 300 and the main body 200, and the gap is configured as an air duct 410. The gap between the water tank 300 and the main body 200 is used to form the air duct 410 and the muffler 500. The inherent structural design of the cleaning equipment 10 can be utilized without adding other structures, and the volume can be reduced while reducing noise.

[0062] That is to say, the retaining rib 510 is arranged between the water tank 300 and the main body 200, so that the gap between the water tank 300 and the main body 200 can be set as the air duct 410, that is, the shape of the retaining rib 510 is the shape of the air duct 410, and the air duct 410 can be a long strip of air duct 410, or it can be an air duct 410 formed by connecting multiple bent sub-segments. The specific shape of the air duct 410 is not limited in this application.

[0063] The volume of the water tank 300 is much smaller than that of the entire main body 200. The retaining rib 510 is set on the water tank 300, and the sewage tank 300 is installed at the corresponding installation position during installation, so that the retaining rib 510 can be in contact with the main body 200, and then the internal cavity surrounded by the water tank 300, the main body 200 and the retaining rib 510 forms an air duct 410. At the same time, the retaining rib 510 can also directly form a muffler 500, without the need to set up another structure, which can reduce costs.

[0064] In some embodiments, the retaining rib 510 and the water tank 300 can be integrally formed. Since the volume of the entire cleaning device 10 is limited and the gap between the water tank 300 and the main body 200 is small, the retaining rib 510 is directly integrally formed on the water tank 300, which reduces the assembly process between the retaining rib 510 and the water tank 300, and can also reduce the sealing process between the retaining rib 510 and the water tank 300, thereby reducing costs.

[0065] Of course, in addition to this, the retaining rib 510 can also be set on the main body 200, that is, the retaining rib 510 is set at the installation position corresponding to the water tank 300. When the water tank 300 is installed on the main body 200, it can be in contact with the water tank 300, and then the retaining rib 510, the water tank 300 and the main body 200 can form a closed air duct 410.

[0066] As for the type of silencer 500, it can be designed as: expansion silencer 500, insertion tube silencer 500, perforated silencer 500, resonance silencer 500, quarter-wavelength tube and other single silencers 500 or their combination forms, which may not be limited in the present application, and several of them will be introduced in detail below.

[0067] Among them, the silencer 500 may include a silencer 520, that is, the silencer 500 may be configured as a silencer chamber 520, the silencer chamber 520 is connected to the air duct 410, and the depth direction of the silencer chamber 520 is set at an angle to the air outlet direction of the air duct 410, which means that the depth direction of the silencer chamber 520 is different from the air outlet direction of the air duct 410. In the process of noise flowing with the air flow, when the noise flows to the silencer chamber 520, it will enter the silencer chamber 520, generate resonance in the silencer chamber 520, and achieve the purpose of silence, or the noise moves to the bottom wall of the silencer chamber 520 and then reflects, and finally returns to the air duct 410, superimposed with the noise in the air duct 410, and then achieves the purpose of silence, or in the process of entering the silencer chamber 520, the energy of the noise is weakened by perforation to achieve the purpose of silence.

[0068] Among them, the depth direction of the silencer chamber 520 is set at an angle with the air outlet direction of the air duct 410, and the angle range is (0°, 180°), which can be 30°, 45°, 90°, 135°, 150°, etc.

[0069] In some embodiments, the muffler cavity 520 is connected to the air duct 410 via a connecting port 530 , and in the air outlet direction of the air duct 410 , the length of the connecting port 530 is smaller than the length of the muffler cavity 520 .

[0070] The air duct 410 has a first air inlet 420 and a first air outlet 430, the first air inlet 420 is connected to the second air outlet 114 of the fan assembly 100, the air outlet direction of the air duct 410 refers to the direction from the first air inlet 420 to the first air outlet 430, the airflow flows from the first air inlet 420 to the first air outlet 430 under the action of the fan assembly 100, the air outlet direction of the air duct 410 is the direction from the first air inlet 420 to the first air outlet 430, in the air outlet direction of the air duct 410, the length of the connecting port 530 is less than the length of the muffler cavity 520, and the length of the muffler cavity 520 may be much greater than the length of the connecting port 530. That is, the connecting port 530 is a narrow hole, and the entire muffler cavity 520 can be considered to be roughly a closed cavity.

[0071] When the noise enters the silencer chamber 520 through the connecting port 530, the air in the silencer chamber 520 is stimulated by the sound waves and vibrates back and forth like a piston, converting the sound energy into heat energy and dissipating it, thereby achieving the purpose of silencing.

[0072] Since the length of the silencer cavity 520 in the air outlet direction of the air duct 410 is relatively long, the vibration space of the air in the silencer cavity 520 is relatively large, and thus the sound energy can be completely converted into heat energy and dissipated as much as possible, thereby improving the silencing effect. In other words, the basic principle of resonance is that after the sound wave enters the silencer cavity 520, it will be reflected multiple times in the silencer cavity 520, and the purpose of silencing can be achieved through the superposition and interference of waves. When the sound wave can produce a 180-degree phase difference after reflection, the silencing effect after superposition will be the best, so the depth of the silencer cavity 520 can be set according to the frequency of the noise.

[0073] During the operation of the fan assembly 100, since the structure of the fan assembly 100 is determined and the working scene is basically determined, the frequency of the noise generated by the fan assembly 100 is basically determined, so the depth of the silencer chamber 520 can be set according to the frequency of the noise.

[0074] In this case, it can be considered that the sound is eliminated by resonance, and this structure can be considered to be an implementation of the principle of the resonance silencer 500.

[0075] In some embodiments, the length of the silencer cavity 520 in the air outlet direction of the air duct 410 is the same as the length of the connecting port 530 in the air outlet direction of the air duct 410, that is, after the noise enters the silencer cavity 520, it flows to the bottom wall of the silencer cavity 520 and then enters the air duct 410 after being reflected by the bottom wall of the silencer cavity 520, and then superimposed with the noise in the air duct 410 to generate interference, thereby achieving the purpose of silencing. In this case, the silencer cavity 520 uses the principle of a quarter-wavelength tube for silencing.

[0076] See also Figure 5 and Figure 6 In some embodiments, there are multiple communication openings 530 , and the multiple communication openings 530 are arranged in sequence along the air outlet direction of the air duct 410 .

[0077] Multiple connecting ports 530 are arranged in sequence along the air outlet direction of the air duct 410. The spacing distance between two adjacent connecting ports 530 can be the same or different. The specific spacing distance can also be set according to the length of the silencer chamber 520 in the air outlet direction of the air duct 410. The number of connecting ports 530 may not be specifically limited.

[0078] Multiple connecting ports 530 are arranged in sequence along the air outlet direction of the air duct 410. When the noise flows toward the first air outlet 430 along with the air flow, the noise can enter the silencer chamber 520 from different connecting ports 530, so that the noise can basically enter the silencer chamber 520 for silencer, thereby improving the silencer effect of the silencer chamber 520.

[0079] When the noise enters the silencer chamber 520 through the connecting port 530, due to the different impedances between the connecting port 530 and the air duct 410, the gas will rub against the inner wall of the connecting port 530 during the process of passing through the connecting port 530, causing the gas to vibrate, that is, the noise will vibrate during the contact with the connecting port 530, thereby converting the sound energy into heat, thereby achieving the purpose of damping and silencing.

[0080] See also Figure 7 and Figure 8 In some embodiments, there are multiple silencer cavities 520 , and the multiple silencer cavities 520 are arranged in sequence and spaced apart along the air outlet direction of the air duct 410 .

[0081] The extension directions of the multiple silencing cavities 520 can be the same or different, and can be set according to the position between the water tank 300 and the main body 200. The interval distance between two adjacent silencing cavities 520 can be the same or different, and can be set according to the position between the water tank 300 and the main body 200.

[0082] Similarly, the shapes of the multiple silencer cavities 520 may be the same or different. The shapes of the multiple silencer cavities 520 may be the same or different. The shapes of some silencer cavities 520 may be the same and some may be different.

[0083] In addition, as for the lengths of the multiple silencer cavities 520, similarly, the lengths of the multiple silencer cavities 520 can be the same, the lengths of the multiple silencer cavities 520 can be different, or the lengths of some silencer cavities 520 can be the same and the lengths of some silencer cavities 520 can be different.

[0084] In some embodiments, the depths of any two silencing cavities 520 are the same or different.

[0085] The depths of any two silencing cavities 520 may be the same or different. The depths of multiple silencing cavities 520 may be the same, or the depths of all silencing cavities 520 may be different, or the depths of some silencing cavities 520 may be the same, and the depths of some silencing cavities 520 may be different. That is, the multiple silencing cavities 520 may have different depths.

[0086] 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 cavities 520 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.

[0087] In some embodiments, the depth of the muffler cavity 520 is set according to the following formula:

[0088] f = (c / l 1)(2n+1) / 4;

[0089] Wherein, f is the frequency of the noise, c is the speed of sound of the noise, l1 is the depth of the silencing cavity 520, and n is zero or a positive integer.

[0090] According to the above formula, it can be obtained by deformation that f=(c / l 1)(2n+1) / 4; 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 520 is equal to an odd multiple of one quarter wavelength of the noise. Then, it can be considered that the depth of the silencing chamber 520 is related to the one quarter wavelength of the noise, and the silencing chamber 520 can be considered to be a one quarter wavelength tube. When the noise in the accommodating chamber 112 enters the silencing chamber 520, it is reflected by the silencing chamber 520 and then propagates again to the connection between the silencing chamber 520 and the air duct 410. Then, the running length of the noise is exactly half a wavelength, and there is a phase difference of 180 degrees between the noise and the noise in the air duct 410, so that they can interfere with each other and attenuate the volume of the noise, thereby reducing the volume of the noise and improving the user experience.

[0091] That is to say, in some embodiments, the depth of the silencing chamber 520 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 chamber 520 and the noise in the air duct 410. The two can interfere with each other after being superimposed, thereby achieving the purpose of noise reduction.

[0092] In some embodiments, both sides of the air duct 410 are provided with a muffler cavity 520. Providing the muffler cavity 520 on both sides can improve the efficiency.

[0093] See also Fig. 9 and Fig.10 In some embodiments, the projection of the first air outlet 430 in the air outlet direction of the air duct 410 is located within the projection of the air duct 410 along the air outlet direction of the air duct 410. This indicates that the opening 115b of the first air outlet 430 is relatively small. When noise flows to the air outlet along with the air flow, due to the difference between the impedance at the first air outlet 430 and the impedance in the air duct 410, part of the noise will be reflected in the opposite direction of the air outlet direction under the action of the inner wall, and then superimposed and interfered with the noise in the air duct 410, achieving a noise reduction effect.

[0094] In some embodiments, the air duct 410 has a first air segment 412 and a second air segment 413 , and the width of the first air segment 412 is smaller than the width of the second air segment 413 .

[0095] Among them, the width of the first air section 412 and the second air section 413 refers to the width in the direction perpendicular to the air outlet direction. The first air section 412 is connected to the first air inlet 420, and the second air section 413 is connected to the first air outlet 430. When the noise enters the second air section 413 from the first air section 412, the noise can be diffused in the second air section 413 due to the increase in width, so that the noise can be diffused in different directions. After being reflected by the inner wall of the air duct 410, it can be superimposed and interfered, and can also achieve a certain sound-absorbing effect.

[0096] In some embodiments, the muffler 500 may be directly disposed at the first air outlet 430 or the first air inlet 420. In addition to disposing the muffler cavity 520 in the air duct 410 through the retaining rib 510, the muffler 500 may be directly disposed at the first air outlet 430 or the first air inlet 420, and the purpose of muffler can also be achieved by disposing an external muffler 500.

[0097] Of course, in addition to this, the external silencer 500 can also be set inside the air duct 410.

[0098] See also Fig.11 and Fig.12 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 cavity 112 and a second air inlet 113 and a second air outlet 114 connected to the accommodating cavity 112; the wind wheel 120 is arranged in the accommodating cavity 112; wherein, a noise reduction cavity 115 connected to the accommodating cavity 112 is arranged in the shell 110, the noise reduction cavity 115 is located between the wind wheel 120 and the second air outlet 114, and the depth direction of the noise reduction cavity 115 is set at an angle to the air outlet direction of the second air outlet 114 to reduce the noise of the second air outlet 114.

[0099] 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.

[0100] The second air inlet 113 and the second air outlet 114 are both connected to the accommodating chamber 112. When the wind wheel 120 is working, external gas enters the accommodating chamber 112 from the second air inlet 113 and is discharged from the second air outlet 114, so that the area between the second air inlet 113 and the second 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 second air outlet 114 to the outside, resulting in a louder noise in the cleaning equipment during operation, affecting the user experience.

[0101] In the embodiment of the present application, a noise reduction chamber 115 is arranged between the wind wheel 120 and the second air outlet 114. The depth direction of the noise reduction chamber 115 is arranged at an angle to the air outlet direction of the second air outlet 114, that is, the depth direction of the noise reduction 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 noise reduction chamber 115 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 second air outlet 114 to a certain extent.

[0102] It should be noted that the noise reduction chamber 115 can play a certain degree of sound-absorbing effect. The depth of the noise reduction chamber 115 is related to the wavelength of the noise. When the phase of the noise reflected back from the noise reduction chamber 115 and the phase of the noise in the noise reduction chamber 115 in the air duct are in two opposite half-waves, the reflected noise is superimposed with the noise in the air duct and can weaken the volume of the noise at the second air outlet 114 to a certain extent.

[0103] The angle between the depth direction of the noise reduction chamber 115 and the air outlet direction of the second air outlet 114 is in the range of (0°-180°), and can be specifically 30°, 45°, 90°, 135°, 150°, etc.

[0104] The bottom wall 115a of the noise reduction chamber 115 refers to the wall opposite to the opening 115b of the noise reduction chamber 115, and is not the wall at the bottom of the noise reduction chamber 115 when the fan assembly 100 is in the working state.

[0105] 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 noise reduction chamber 115 can be set according to the frequency of the noise, so that the volume of the noise flowing out from the second air outlet 114 can be reduced.

[0106] In some embodiments, the depth of the noise reduction cavity 115 is set according to the following formula:

[0107] f = (c / l 2)(2n+1) / 4;

[0108] Wherein, f is the frequency of the noise, c is the speed of sound of the noise, l2 is the depth of the noise reduction cavity 115, and n is zero or a positive integer.

[0109] According to the above formula, it can be obtained by deformation that l2=(c / f)(2n+1) / 4; wherein, the speed of sound of noise divided by the frequency of noise is equal to the wavelength of noise, and n is 0 or a positive integer, that is, the length of the noise reduction cavity 115 is equal to an odd multiple of one quarter wavelength of noise. Then, the depth of the noise reduction cavity 115 can be considered to be related to one quarter wavelength of noise. Then, the noise reduction cavity 115 can be considered to be a quarter wavelength tube. When the noise in the accommodating cavity 112 enters the noise reduction cavity 115, it is reflected by the noise reduction cavity 115 and then propagates again to the connection between the noise reduction cavity 115 and the accommodating cavity 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 cavity 112. They can interfere with each other and attenuate the volume of the noise, thereby reducing the volume of the noise and improving the user experience.

[0110] That is to say, in some embodiments, the depth of the noise reduction 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 noise reduction cavity 115 and the noise in the accommodating cavity 112. The two can interfere with each other after being superimposed, thereby achieving the purpose of noise reduction.

[0111] like Fig.13 As shown, the horizontal axis represents the frequency of the noise, and the vertical axis represents the volume of the noise. Fig.13 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 noise reduction cavity 115 in this frequency corresponds to the frequency setting at point A in the figure. Fig.13 The original state refers to the volume of the noise when the noise reduction chamber 115 is not provided, and the noise reduction chamber 115 is provided. The volume of the noise is shown as point B after the noise reduction chamber 115 is provided in the housing 110. Compared with point A, the noise is reduced. Fig.13 It can be seen that after the noise reduction chamber 115 is set, the volume of the corresponding frequency can be adaptively reduced, which can improve the user experience.

[0112] 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 noise reduction chamber 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 noise reduction chamber 115 can also be set as a variable noise reduction chamber 115, so that the depth of the noise reduction chamber 115 can correspond to the frequency of all noises in the frequency band, thereby weakening the noise generated by the fan assembly 100 during operation and improving the user experience.

[0113] In some embodiments, the second air inlet 113 and the second air outlet 114 are respectively disposed at two ends of the shell 110 , and the noise reduction chamber 115 is disposed on the side wall of the shell 110 , and the depth of the noise reduction chamber 115 is perpendicular to the air outlet direction of the second air outlet 114 .

[0114] 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 second air inlet 113 and the second 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 gas in the fan assembly 100, and improve the working effect of the fan assembly 100.

[0115] The noise reduction 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 noise reduction 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 noise reduction chamber 115, so that the noise can overlap with the noise in the shell 110 after being reflected by the noise reduction chamber 115, thereby interfering with each other, thereby weakening the noise to improve the user experience.

[0116] Specifically, the depth direction of the noise reduction chamber 115 is perpendicular to the air outlet direction of the second air outlet 114. When the noise moves from the shell 110 to the noise reduction chamber 115, the movement path in the noise reduction 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.

[0117] In some embodiments, there are multiple noise reduction chambers 115, and the multiple noise reduction chambers 115 are arranged at intervals.

[0118] Among them, the extension directions of the multiple noise reduction 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 second air outlet 114 and the wind wheel 120, etc.

[0119] The spacing distance between two adjacent noise reduction chambers 115 may be the same or different, and may be set according to the layout structure of the entire fan assembly 100 .

[0120] Similarly, the shapes of the multiple noise reduction cavities 115 may be the same or different. The shapes of the multiple noise reduction cavities 115 may be the same or different. The shapes of some noise reduction cavities 115 may be the same and some may be different.

[0121] In addition, as for the lengths of the multiple noise reduction cavities 115, similarly, the lengths of the multiple noise reduction cavities 115 can be the same, the lengths of the multiple noise reduction cavities 115 can be different, or the lengths of some noise reduction cavities 115 can be the same and the lengths of some noise reduction cavities 115 can be different.

[0122] In some embodiments, the depth of the noise reduction cavity 115 is the same in the direction from the second air inlet 113 to the second air outlet 114 .

[0123] The direction of the second air inlet 113 toward the second air outlet 114 refers to the direction of gas flow in the shell 110. In the direction of airflow, the depth of the noise reduction chamber 115 is the same, which means that the noise reduction chamber 115 can only weaken noise of one frequency. As for which frequency of noise the depth of the noise reduction 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.

[0124] The depths of the noise reduction cavities 115 may be the same, and the depths of all positions of the same noise reduction cavity 115 may be the same, or the depths of multiple noise reduction cavities 115 may be the same.

[0125] In some embodiments, the depth of the noise reduction cavity 115 decreases in sequence in the direction from the second air inlet 113 to the second air outlet 114 .

[0126] The depth of the noise reduction chamber 115 decreases in the direction from the second air inlet 113 to the second air outlet 114. As the depth of the noise reduction chamber 115 changes, the frequency of the corresponding noise will also change, so that the frequency that can be weakened by the noise reduction 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 second air outlet 114, thereby improving the user experience.

[0127] Among them, the depth of the noise reduction chamber 115 decreases successively, which may refer to the gradual decrease in the depth of the same silencer chamber in the direction from the second air inlet 113 to the second air outlet 114, or it may refer to that in multiple noise reduction chambers 115, the depths of multiple noise reduction chambers 115 decrease successively in the direction from the second air inlet 113 to the second air outlet 114, wherein, for one of the noise reduction chambers 115, the depth of a single noise reduction chamber 115 may be the same everywhere, or the depth may decrease successively in the direction from the second air inlet 113 to the second air outlet 114.

[0128] In some other embodiments, in the direction from the second air inlet 113 to the second air outlet 114 , the depths of at least two noise reduction chambers 115 are different.

[0129] The depth of the noise reduction cavity 115 is related to a quarter wavelength of the noise. One depth of the noise reduction cavity 115 can weaken noise of one frequency. If the depth of the noise reduction cavity 115 is different in at least two places, it means that noise of at least two or more frequencies can be weakened.

[0130] In the entire frequency band of noise, there may be several noises with louder volume or higher frequency. When the depth of the noise reduction cavity 115 can be set to multiple different depths, the depth of the noise reduction cavity 115 can be set to an odd multiple of one quarter wavelength of the noise with the loudest volume, or an odd multiple of one quarter wavelength of the noise with the highest frequency. It can also be set according to actual needs.

[0131] In some embodiments, the noise reduction cavity 115 has an opening 115b communicating with the accommodating cavity 112, and along the depth direction of the noise reduction cavity 115, the projection area of ​​the noise reduction 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.

[0132] The projected area of ​​the noise reduction chamber 115 at the opening 115b refers to the projected area of ​​the noise reduction chamber 115 on the side wall of the shell 110, and the cross-sectional area of ​​the accommodating chamber 112 at the opening 115b refers to the cross-sectional area of ​​the part of the accommodating chamber 112 at the opening 115b in a plane perpendicular to the air outlet direction. The projected area of ​​the noise reduction 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, which means that the projected area of ​​the noise reduction chamber 115 at the opening 115b is equal to or can be infinitely close to the cross-sectional area of ​​the accommodating chamber 112 at the opening 115b.

[0133] The volume that the noise reduction chamber 115 can attenuate is related to the projection area of ​​the noise reduction 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 noise reduction chamber 115 at the opening 115b is equal to the cross-sectional area of ​​the accommodating chamber 112 at the opening 115b, the noise reduction chamber 115 can basically eliminate the noise of the corresponding frequency. The closer the projection area of ​​the noise reduction chamber 115 at the opening 115b is to the cross-sectional area of ​​the accommodating chamber 112 at the opening 115b, the better the sound-absorbing effect.

[0134] In some embodiments, along the depth direction of the noise reduction cavity 115, the ratio of the projection area of ​​the noise reduction 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 noise reduction 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 silencing effect of the silencing cavity is better.

[0135] The shape of the noise reduction chamber 115 is not specifically limited, and can be a cuboid, a sphere, or an irregular shape, etc. Similarly, the length of the noise reduction chamber 115 is not specifically limited, and can be set according to the space in the accommodating chamber 112, the spacing between the second air outlet 114 and the wind wheel 120, and the relative position.

[0136] For example, when the noise reduction chamber 115 is in the shape of a long strip, the length direction of the noise reduction chamber 115 may be arranged along the direction of the wind wheel 120 close to the second air outlet 114, or the width direction of the noise reduction chamber 115 may be arranged along the direction of the wind wheel 120 close to the second air outlet 114. In addition, the length direction of the noise reduction chamber 115 may be arranged at an angle to the direction of the wind wheel 120 close to the second air outlet 114.

[0137] In some embodiments, the depths of any two noise reduction cavities 115 are the same or different.

[0138] The depths of any two noise reduction cavities 115 may be the same or different. The depths of multiple noise reduction cavities 115 may be the same, or the depths of all noise reduction cavities 115 may be different, or the depths of some noise reduction cavities 115 may be the same, and the depths of some noise reduction cavities 115 may be different. That is, the multiple noise reduction cavities 115 may have different depths.

[0139] 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 noise reduction 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.

[0140] In the foregoing, along the depth direction of the noise reduction cavity 115, the projected area of ​​the noise reduction 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 noise reduction cavities 115 and the depths of the multiple noise reduction cavities 115 are the same, the sum of the projected areas of the multiple noise reduction 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.

[0141] In some embodiments, in the direction from the second air inlet 113 to the second air outlet 114, the plurality of noise reduction chambers 115 are sequentially spaced apart (eg Fig.11 and Fig.12 as shown) or side-by-side (as shown Fig.14 and Fig.15 shown).

[0142] Among them, since the noise reduction chamber 115 is arranged between the wind wheel 120 and the second air outlet 114, in the direction from the second air inlet 113 toward the second air outlet 114, it is actually also in the direction from the wind wheel 120 toward the second air outlet 114. The multiple noise reduction chambers 115 are arranged in sequence at intervals, which means that the multiple noise reduction chambers 115 are arranged in sequence and overlap each other in the direction from the second air inlet 113 toward the second air outlet 114. The multiple noise reduction chambers 115 are arranged side by side, which means that the extension direction of the multiple noise reduction chambers 115 is the same as the direction from the second air inlet 113 to the second air outlet 114.

[0143] For example, when the shape of the noise reduction chamber 115 is a long strip, the multiple noise reduction chambers 115 are arranged in sequence at intervals, which means that the width direction of the multiple noise reduction chambers 115 is along the direction from the second air inlet 113 to the second air outlet 114, and they are arranged overlappingly. The multiple noise reduction chambers 115 are arranged side by side, which means that the length direction of the noise reduction chambers 115 is along the direction from the second air inlet 113 to the second air outlet 114.

[0144] 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.

[0145] 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.

[0146] 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 cleaning device, characterized in that: include: A main body (200) and a fan assembly (100) installed on the main body (200); a water tank (300) mounted on the main body (200) and forming an air duct (410) with the main body (200) and a first air outlet (430) and a first air inlet (420) in communication with the air duct (410), wherein the first air inlet (420) is in communication with the second air outlet (114) of the fan assembly (100); Wherein, a silencer (500) is arranged in the air duct (410) to reduce noise.

2. The cleaning device according to claim 1, characterized in that The water tank (300) is provided with a retaining rib (510), the retaining rib (510) is in contact with the main body (200), and the retaining rib (510), the main body (200) and the water tank (300) form the air duct (410) and the muffler (500).

3. The cleaning device according to claim 1, characterized in that: The silencer (500) comprises a silencer cavity (520), and the depth direction of the silencer cavity (520) is arranged at an angle with the air outlet direction of the air duct (410).

4. The cleaning device according to claim 3, characterized in that: The silencing chamber (520) is connected to the air duct (410) via a connecting port (530); in the air outlet direction of the air duct (410), the length of the connecting port (530) is smaller than the length of the silencing chamber (520).

5. The cleaning device according to claim 4, characterized in that There are a plurality of the communication openings (530), and the plurality of communication openings (530) are arranged in sequence along the air outlet direction of the air duct (410).

6. The cleaning device according to claim 4, characterized in that Along the air outlet direction of the air duct (410), the length of the communication opening (530) is the same as the length of the muffler cavity (520).

7. The cleaning device according to claim 3, characterized in that: There are a plurality of the silencing cavities (520), and the plurality of the silencing cavities (520) are sequentially arranged at intervals along the air outlet direction of the air duct (410).

8. The cleaning device according to claim 7, characterized in that The depths of the plurality of silencing cavities (520) are the same or different.

9. The cleaning device according to any one of claims 3 to 8, characterized in that: The depth of the silencing cavity (520) is related to the frequency of the noise in the air duct (410).

10. The cleaning device according to claim 9, characterized in that The depth of the muffler cavity (520) is set according to the following formula: f = (c / l 1)(2n+1) / 4; Wherein, f is the frequency of the noise, c is the speed of sound of the noise, l1 is the depth of the silencing cavity (520), and n is a positive integer.

11. The cleaning device according to any one of claims 3 to 8, characterized in that: The silencing chamber (520) is provided on both sides of the air duct (410).

12. The cleaning device according to any one of claims 1 to 8, characterized in that: The silencer (500) is also arranged at the first air outlet (430) or the first air inlet (420).

13. The cleaning device according to any one of claims 1 to 8, characterized in that: A projection of the first air outlet (430) along the air outlet direction of the air duct (410) is located within a projection of the air duct (410) along the air outlet direction of the air duct (410).

14. The cleaning device according to claim 13, characterized in that The air duct (410) comprises a first air section (412) and a second air section (413); the first air section (412) is connected to the first air inlet (420), the second air section (413) is connected to the first air outlet (430), and the width of the first air section (412) is smaller than the width of the second air section (413).

15. The cleaning device according to any one of claims 1 to 8, characterized in that: The fan assembly (100) comprises: A housing (110) having a receiving chamber (112) and a second air inlet (113) and a second air outlet (114) communicated with the receiving chamber (112); A wind wheel (120) is arranged in the accommodating cavity (112); A noise reduction chamber (115) connected to the accommodating chamber (112) is provided in the shell (110); the noise reduction chamber (115) is located between the wind wheel (120) and the second air outlet (114); and the depth direction of the noise reduction chamber (115) is arranged at an angle to the air outlet direction of the second air outlet (114) to reduce noise.

16. A cleaning system, characterized in that: It comprises a base station and the cleaning device according to any one of claims 1 to 15.

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