Cleaning apparatus and cleaning system

Abstract

This disclosure provides a cleaning device and a cleaning system, relating to the field of smart home technology. The cleaning device includes: a device body, a cleaning component, a wastewater tank, a suction assembly, and a noise reducer. The cleaning component is disposed on the device body and is used to clean the surface to be cleaned. The wastewater tank is disposed on the device body. The suction assembly has an air intake port and an exhaust port, the air intake port being connected to the wastewater tank to create negative pressure in the wastewater tank. The noise reducer is connected to the exhaust port so that the airflow discharged by the suction assembly passes through the noise reducer, thereby reducing the noise generated when the suction assembly exhausts air.

Description

Technical Field

[0001] This disclosure relates to the field of smart home technology, and more specifically, to a cleaning device and cleaning system. Background Technology

[0002] As society continues to develop and people's living standards improve, cleaning robots are becoming increasingly popular in households because they save time and effort compared to traditional manual cleaning. A typical cleaning robot consists of the main unit and a high-speed rotating cleaning component that mops the floor.

[0003] Currently, live water floor cleaning technology is widely used in cleaning equipment. Live water floor cleaning technology adds a real-time wastewater recycling system. The squeegee in the real-time wastewater recycling system can scrape off the wastewater adsorbed on the mop and collect the scraped wastewater into the wastewater tank. Therefore, there are high requirements for the real-time extraction of wastewater from the wastewater tank.

[0004] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0005] The purpose of this disclosure is to provide a cleaning device and a cleaning system.

[0006] According to one aspect of this disclosure, a cleaning apparatus is provided, the cleaning apparatus comprising:

[0007] Equipment body;

[0008] A cleaning component, which is disposed on the device body, is used to clean the surface to be cleaned;

[0009] A wastewater tank is mounted on the main body of the equipment.

[0010] A suction assembly having an air intake port and an exhaust port, wherein the air intake port is connected to the wastewater tank to create negative pressure in the wastewater tank;

[0011] A noise reducer is connected to the exhaust port so that the airflow discharged from the suction assembly passes through the noise reducer.

[0012] In one exemplary embodiment of this disclosure, the device body includes a device housing, and the noise reducer includes a noise reduction housing; a noise reduction cavity is provided inside the noise reduction housing, or the noise reduction housing is connected to the device housing to form a noise reduction cavity.

[0013] In one exemplary embodiment of this disclosure, the device body includes a device housing, the device housing is provided with an exhaust port, and the exhaust port of the noise reducer communicates with the exhaust port.

[0014] In one exemplary embodiment of this disclosure, the noise reduction device includes an expansion tube having an expansion cavity.

[0015] In one exemplary embodiment of this disclosure, the expansion cavity is filled with a noise-reducing medium.

[0016] In one exemplary embodiment of this disclosure, the noise reduction medium includes at least one of glass fiber wool, rock wool, and ceramic wool.

[0017] In one exemplary embodiment of this disclosure, the noise reduction device further includes an air inlet pipe and an air outlet pipe, the air inlet pipe and the air outlet pipe being respectively connected to the expansion pipe and communicating with the expansion cavity;

[0018] Specifically, in the axial direction of the intake pipe, the cross-sectional area of ​​the expansion cavity is larger than the cross-sectional area of ​​the intake pipe; in the axial direction of the exhaust pipe, the cross-sectional area of ​​the expansion cavity is larger than the cross-sectional area of ​​the exhaust pipe.

[0019] In one exemplary embodiment of this disclosure, the noise reduction device further includes an air inlet pipe and an air outlet pipe, the air inlet pipe and the air outlet pipe being respectively connected to the expansion pipe and communicating with the expansion cavity;

[0020] The air inlet pipe and the air outlet pipe are located outside the expansion cavity, or at least a portion of the air inlet pipe and the air outlet pipe are located inside the expansion cavity.

[0021] In one exemplary embodiment of this disclosure, the volume of the expansion cavity is greater than 5 ml.

[0022] In one exemplary embodiment of this disclosure, the suction assembly includes a diaphragm pump, the diaphragm pump includes a medium chamber, and the suction port and the exhaust port are respectively connected to the medium chamber.

[0023] In one exemplary embodiment of this disclosure, the diaphragm pump further includes a diaphragm cavity, and the diaphragm pump is also provided with an air inlet and an air outlet. The air inlet and the air outlet are respectively connected to the diaphragm cavity, and the air outlet of the diaphragm cavity is connected to the air inlet of the noise reduction device.

[0024] In one exemplary embodiment of this disclosure, the air outlet is connected to the air inlet of the noise reducer via a connecting pipe, and the connecting pipe is provided with a Helmholtz silencer and / or a quarter-wavelength tube.

[0025] In one exemplary embodiment of this disclosure, the exhaust port is connected to the air inlet of the noise reducer via a connecting pipe, and the connecting pipe is provided with a Helmholtz silencer and / or a quarter-wavelength tube.

[0026] In one exemplary embodiment of this disclosure, the connecting pipe is provided with the Helmholtz silencer and the quarter-wavelength tube, the quarter-wavelength tube being located between the Helmholtz silencer and the suction assembly.

[0027] In one exemplary embodiment of this disclosure, the cleaning device further includes:

[0028] A scraper and a wastewater tank, the scraper being configured to scrape wastewater off the cleaning component, the wastewater tank being configured to collect the wastewater scraped off the cleaning component by the scraper, and the wastewater container being configured to recycle the wastewater in the wastewater tank.

[0029] In one exemplary embodiment of this disclosure, the cleaning component is a roller mop or a tracked mop.

[0030] In one exemplary embodiment of this disclosure, the cleaning device is a self-propelled cleaning device.

[0031] According to another aspect of this disclosure, a cleaning system is provided, the cleaning system comprising:

[0032] The cleaning equipment described in any of the above embodiments;

[0033] A base station, which is used to interface with the cleaning equipment.

[0034] The cleaning equipment disclosed herein has an air intake port of the suction component connected to a negative pressure hole on a wastewater tank. Gas in the wastewater tank is discharged through the negative pressure hole via the exhaust port, creating a negative pressure within the tank. This negative pressure, created by the suction component, allows wastewater from the wastewater tank to be drawn into the wastewater tank through a wastewater pipe. However, the suction component generates significant noise when discharging exhaust gas through the exhaust port, especially when the exhaust gas is directly discharged outside the cleaning equipment, impacting the user experience. To address this, this disclosure incorporates a noise reducer at the exhaust port of the suction component. This noise-generating gas is directed into the noise reducer for processing, effectively reducing the impact of the suction component's operating noise on the user and significantly improving the user experience when using the cleaning equipment.

[0035] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0036] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0037] Figure 1 A schematic diagram of a cleaning system provided in one embodiment of this disclosure.

[0038] Figure 2 This is a schematic diagram of a dirt suction and noise reduction system provided in one embodiment of the present disclosure.

[0039] Figure 3 This is a schematic diagram of the structure of a noise reduction device provided in one embodiment of the present disclosure.

[0040] Figure 4 This is a schematic diagram of a noise reduction device with an inserted expansion cavity provided in one embodiment of the present disclosure.

[0041] Figure 5 This is a schematic diagram of a noise reducer with a non-insertionable expansion cavity provided in one embodiment of the present disclosure.

[0042] Figure 6 A schematic diagram of a dirt-absorbing and noise-reducing device provided for another embodiment of this disclosure.

[0043] 10. Cleaning equipment; 20. Base station;

[0044] 110. Cleaning components; 121. Wastewater tank; 122. Scraper; 130. Wastewater container; 140. Suction assembly; 150. Noise reducer; 151. Expansion tube; 152. Expansion chamber; 153. Air inlet pipe; 154. Air outlet pipe; 160. Quarter-wavelength tube; 170. Helmholtz silencer. Detailed Implementation

[0045] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0046] Although relative terms such as "up" and "down" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the device of the icon is flipped upside down, the component described as "up" will become the component described as "down." When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0047] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0048] Embodiments of this disclosure provide a cleaning system, such as Figure 1 As shown, the cleaning system includes a cleaning device 10 and a base station 20. The cleaning device 10 can be, for example, a mopping robot, a sweeping robot, or a combined sweeping and mopping robot; the cleaning device 10 may include a device body, a drive module, a sensing module, a control module, a cleaning module, an energy module, and a human-machine interaction module. The base station 20 is used to dock with the cleaning device 10, allowing it to be parked. The cleaning device 10 can perform functions such as charging, self-cleaning, docking, sewage discharge, water replenishment, and dust collection on the base station 20.

[0049] In one embodiment, the cleaning device 10 is a self-propelled cleaning device, meaning that the cleaning device 10 is configured to automatically move along a target direction on a travel surface, which can be the surface to be cleaned by the cleaning device 10. Alternatively, the cleaning device 10 can be a sweeping and mopping robot, in which case the cleaning device 10 operates on the ground.

[0050] In one embodiment, the drive module may include a drive wheel assembly. The drive module can simultaneously control the left and right wheels. For more precise control of the machine's movement, the drive module preferably includes a left drive wheel assembly and a right drive wheel assembly. The left and right drive wheel assemblies are symmetrically arranged along a transverse axis defined by the device body. In one embodiment, to enable the self-propelled cleaning device to move more stably or with greater mobility on the ground, the self-propelled cleaning device may include one or more steering wheels. These steering wheels may be driven wheels or drive wheels, and their structural forms include, but are not limited to, omnidirectional wheels. The steering wheels may be located in front of the drive wheel assembly. A drive motor provides power to the drive wheel assembly and / or the steering wheels.

[0051] In one embodiment, the sensing module may include a position determination device located above the device body, a buffer located in the forward portion of the device body, and a cliff sensor and ultrasonic sensor, infrared sensor, magnetometer, accelerometer, gyroscope, odometer, and other sensing devices located at the bottom of the device body, providing the control module with various position and motion state information of the device body. For example, the forward portion of the device body is provided with a buffer. During the cleaning process, when the drive wheel assembly propels the cleaning device 10 to move on the ground, the buffer detects one or more objects in the travel path of the cleaning device 10 via a sensor module, such as a collision sensor. The cleaning device 10 can pass through the objects detected by the collision sensor, such as steps, obstacles, or walls, and the control drive structure causes the cleaning device 10 to respond to the objects, such as stepping over steps.

[0052] In one embodiment, the control module can combine distance and speed information fed back from sensors such as buffers, cliff sensors, ultrasonic sensors, infrared sensors, magnetometers, accelerometers, gyroscopes, and odometers to comprehensively determine the current working state of the robot vacuum cleaner, such as climbing stairs, crossing thresholds, walking on carpets, being on a cliff, stuck above or below, having a full dustbin, or being picked up. It will also provide specific next action strategies for different situations, making the cleaning device 10 work more in line with the user's requirements and providing a better user experience. Furthermore, the control module can plan the most efficient and reasonable cleaning path and cleaning method based on real-time map information drawn using SLAM (Simultaneous Localization and Mapping), which can improve the cleaning efficiency of the cleaning device 10.

[0053] In one embodiment, the energy module may include a rechargeable battery, such as a nickel-metal hydride battery or a lithium battery. The rechargeable battery may be connected to a charging control circuit, a battery pack charging temperature detection circuit, and a battery undervoltage monitoring circuit. These circuits are then connected to a microcontroller control circuit. The main unit is charged by connecting to a charging station via charging electrodes located on the side or bottom of the unit.

[0054] In one embodiment, the human-machine interaction module may include buttons on the main unit panel for users to select functions; it may also include a display screen and / or indicator lights and / or a speaker, which display the current status of the machine or the available functions to the user; and it may also include a mobile client application. For path navigation cleaning equipment, the mobile client can display a map of the environment where the equipment is located, as well as the machine's position, providing users with richer and more user-friendly functions.

[0055] In one embodiment, the cleaning module may include a dry cleaning module and / or a combination of dry and wet cleaning modules. The dry cleaning module may include a roller brush assembly, side brushes, etc., while the wet cleaning module may include a mop head, a water tank, etc.

[0056] Currently, live water floor cleaning technology is widely used in cleaning equipment 10. Compared with the previous dual-disc mopping solution, live water floor cleaning technology adds a real-time wastewater recycling system. The cleaning component 110 on the cleaning equipment 10 using live water floor cleaning technology is usually a roller mop or a tracked mop. During the rolling process, the roller mop or tracked mop continuously sprays clean water or detergent onto the mop to clean the surface, greatly improving the cleaning effect. The real-time wastewater recycling system usually includes a wastewater tank 121 and a scraper 122. During the rolling cleaning process of the roller mop or tracked mop, the scraper 122 can scrape off the wastewater adsorbed on the mop after cleaning the surface, and the scraped wastewater falls into the wastewater tank 121, so that the mop can be sprayed with clean water or detergent again to continue cleaning the surface. The sewage in the sewage tank 121 needs to be continuously or at preset intervals. The sewage tank 121 is connected to the sewage tank 130 through a sewage pipe. The sewage in the sewage tank 121 is usually pumped into the sewage tank 130 through the sewage pipe. The negative pressure equipment can create negative pressure in the sewage tank 130, so that the sewage in the sewage tank 121 flows into the sewage tank 130 through the sewage pipe.

[0057] Regarding how to extract sewage from sewage tank 121 into sewage tank 130 via sewage pipe, this disclosure provides a cleaning device 10, such as... Figure 2 As shown, the cleaning equipment 10 includes a wastewater tank 130, a suction assembly 140, and a noise reducer 150. The wastewater tank 130 is used to collect wastewater from the wastewater tank 121. The suction assembly 140 has an air intake port and an exhaust port. The air intake port is connected to a negative pressure hole on the wastewater tank 130 to draw negative pressure from the wastewater tank 130. The noise reducer 150 is connected to the exhaust port of the suction assembly 140 so that the airflow discharged from the suction assembly 140 passes through the noise reducer 150.

[0058] The cleaning device 10 disclosed herein has an air intake port of the suction component 140 connected to a negative pressure hole on the wastewater tank 130. Through the negative pressure hole, gas in the wastewater tank 130 can be discharged through the exhaust port to create a negative pressure within the wastewater tank 130. By creating a negative pressure in the wastewater tank 130 through the suction component 140, wastewater in the wastewater trough 121 can be drawn into the wastewater tank 130 through a wastewater pipe. However, the suction component 140 generates significant noise when discharging exhaust gas through the exhaust port, especially when the exhaust gas is directly discharged outside the cleaning device 10, which negatively impacts the user experience. To address this, a noise reducer 150 is installed at the exhaust port of the suction assembly 140. This noise reducer 150 is used to draw in the noisy gas generated during the operation of the suction assembly 140 for processing. Actual measurements show that the sound pressure level at 10cm from the exhaust port of the suction assembly 140 can be reduced by approximately 11.4dB (54.1dB → 42.7dB), effectively reducing the impact of the operating noise of the suction assembly 140 on the user and significantly improving the user's experience when using the cleaning equipment 10.

[0059] In one embodiment, the suction assembly 140 includes a diaphragm pump mounted on the device body. The diaphragm pump has an intake port and an exhaust port. The intake port communicates with a negative pressure hole on the wastewater tank 130. The diaphragm pump is configured to discharge gas from the wastewater tank 130 through the negative pressure hole and exhaust port to create a negative pressure in the wastewater tank 130. The exhaust port of the diaphragm chamber communicates with the air inlet of the noise reducer 150. By creating a negative pressure in the wastewater tank 130 through the diaphragm pump, wastewater from the wastewater tank 121 is drawn into the wastewater tank 130 through a wastewater pipe. Since the diaphragm pump creates negative pressure through the reciprocating motion of the diaphragm within the diaphragm chamber, it eliminates the need for a shaft seal device, thus avoiding wastewater leakage caused by seal wear. Simultaneously, solid particles in the wastewater can smoothly pass through the media chamber with the diaphragm movement, preventing blockage. The diaphragm material (such as rubber or polytetrafluoroethylene) of the diaphragm pump has wear-resistant properties, resulting in a longer service life and lower maintenance costs. In addition, when the sewage level in the sewage tank 121 is low, the diaphragm pump will not cause serious damage to the pump body even if it runs dry for a short time, reducing energy waste and equipment wear caused by frequent start-stop or liquid level fluctuations.

[0060] It is understood that the device providing negative pressure in the suction assembly 140 may also be a peristaltic pump, a rotary vane vacuum pump, a reciprocating vacuum pump, or a negative pressure fan, etc., and this disclosure does not impose any restrictions on it.

[0061] In one embodiment, the diaphragm pump can be an electric diaphragm pump or a pneumatic diaphragm pump. The pneumatic diaphragm pump has a pump body with a medium chamber and a diaphragm chamber, as well as an air intake port and an exhaust port connecting the medium chamber and an air inlet and an air outlet connecting the diaphragm chamber. The air outlet of the diaphragm chamber in the diaphragm pump is connected to the air inlet of the noise reducer 150, that is, both the medium chamber and the diaphragm chamber are connected to the noise reducer 150. When the diaphragm pump is working, compressed gas is introduced through the air inlet of the diaphragm chamber to drive the diaphragm to move. The exhaust gas after driving the diaphragm to move is discharged through the air outlet, which generates a large amount of noise. The noise is even greater when the exhaust gas is directly discharged outside the cleaning equipment 10 through the air outlet, which affects the user's experience. To address this, by setting the noise reducer 150 at the air outlet of the diaphragm chamber, the noisy gas generated when the diaphragm pump is working can be introduced into the noise reducer 150 for treatment, effectively reducing the impact of the diaphragm pump's operating noise on the user and significantly improving the user's experience when using the cleaning equipment 10.

[0062] It is understood that the noise reduction device 150 includes a noise reduction chamber, into which the gas discharged from the outlet of the diaphragm chamber and the gas discharged from the exhaust port of the medium chamber are both discharged. Alternatively, the noise reduction device 150 may include two independently configured sub-noise reduction devices or two independently configured noise reduction chambers, with the gas discharged from the outlet of the diaphragm chamber and the gas discharged from the exhaust port of the medium chamber respectively discharged into two independent sub-noise reduction devices or two independently configured noise reduction chambers. The device can be specifically designed based on the characteristics of the gas discharged from the outlet of the diaphragm chamber and the gas discharged from the exhaust port of the medium chamber, employing different noise reduction chamber structures and materials. For example, suitable noise reduction chambers and sound-absorbing materials can be designed based on parameters such as gas flow rate and pressure to more accurately process the noise from the outlet of the diaphragm chamber and the exhaust port of the medium chamber.

[0063] Specifically, the equipment body includes an equipment housing, and the noise reducer 150 includes a noise reduction housing. The noise reduction housing can independently form a noise reduction cavity, or the noise reduction housing can cooperate with the equipment housing to form a noise reduction cavity. For example... Figure 3As shown, the noise reduction chamber is formed independently by the noise reduction housing, ensuring its sealing and stability, allowing the gas to undergo sufficient noise reduction treatment within the chamber. Simultaneously, the noise reducer 150 is designed as an independent modular structure, with its own independent noise reduction housing and chamber. This facilitates subsequent replacement and upgrades. When the noise reducer 150 malfunctions or requires improved noise reduction performance, a new noise reducer 150 can be directly replaced without large-scale modifications to the entire device, simplifying installation and maintenance and reducing production and operating costs. The noise reduction chamber is formed by the cooperation of the noise reduction housing and the equipment housing. By utilizing the equipment housing as part of the noise reducer 150 structure, irregular spaces within the cleaning equipment 10, such as gaps between internal components and reinforcing ribs, and corners, can be rationally arranged to create a space with noise reduction functionality. This fully utilizes the internal space of the equipment, relatively increasing the volume of the noise reduction chamber and thus improving the noise reduction effect.

[0064] When the noise reduction housing and the equipment housing are combined to form a noise reduction cavity, the materials of the noise reduction housing and the equipment housing can be the same, which facilitates the connection between the two and ensures the noise reduction effect of the noise reduction cavity.

[0065] In one embodiment, the device body includes a housing with an exhaust port, and the outlet of the noise reducer 150 is connected to the exhaust port. The gas processed by the noise reducer 150 can be directly discharged from the cleaning device 10 through the exhaust port on the housing, ensuring smooth gas flow within the cleaning device 10 and preventing back pressure in the pipeline due to poor exhaust, which would affect the effect on the sewage tank 130.

[0066] The cleaning equipment 10 may also include a negative pressure fan. The negative pressure fan is used to suck the dust and debris swept by the brush head to the cleaning tank into the dust box by wind pressure. The air outlet of the negative pressure fan can be set to correspond to the exhaust hole on the equipment housing. The exhaust hole is, for example, a grille structure set on the side wall of the equipment housing of the cleaning equipment 10. The negative pressure fan and the noise reduction device 150 share one exhaust hole.

[0067] In one embodiment, such as Figures 3-5 As shown, the noise reduction device 150 includes an expansion tube 151, which has an expansion cavity 152. The expansion cavity 152 alters the flow state of the gas. When noisy gas enters the expansion cavity 152, the sudden expansion of the space reduces the gas velocity and pressure, thus dispersing and attenuating the noise energy. Simultaneously, the special structure of the expansion cavity 152 allows the gas to undergo acoustic phenomena such as reflection and refraction within the cavity, further consuming noise energy and achieving the goal of noise reduction.

[0068] In one embodiment, a noise reduction structure may be provided in the expansion cavity 152, such as a labyrinthine gas channel. The gas turns and reflects multiple times in the labyrinthine channel, increasing the noise propagation path and time, so that the noise energy is continuously consumed during the propagation process, and has a certain attenuation effect on noise of different frequencies.

[0069] In one embodiment, the expansion cavity 152 is filled with a noise-reducing medium. The noise-reducing medium has good sound absorption properties. When the noisy gas flows in the expansion cavity 152, it comes into contact with the noise-reducing medium. The noise waves cause tiny vibrations within the medium, which convert the noise energy into heat energy through friction and viscosity. At the same time, it can also increase the noise propagation path and time, thereby further improving the noise reduction effect.

[0070] The noise reduction medium includes at least one of glass fiber wool, rock wool, and ceramic wool. Glass fiber wool is lightweight and has good sound absorption properties, effectively absorbing mid-to-high frequency noise; rock wool has good sound absorption properties and good chemical stability, making it suitable for various environments; ceramic wool has advantages such as corrosion resistance and significant sound absorption, effectively reducing noise generated by the suction component 140 during operation, while ensuring the stability and reliability of the noise reduction medium during the use of the cleaning equipment 10, extending the service life of the noise reduction device, and reducing equipment maintenance costs.

[0071] In one embodiment, such as Figures 3-5 As shown, the noise reduction device 150 also includes an air inlet pipe 153 and an air outlet pipe 154. The air inlet pipe 153 and the air outlet pipe 154 are respectively connected to the expansion pipe 151 and communicate with the expansion cavity 152. The air inlet pipe 153 and the air outlet pipe 154 facilitate the connection of the noise reduction device 150 to the air inlet pipe 153 and the air outlet pipe 154, thereby facilitating the deployment of the noise reduction device 150.

[0072] In the axial direction of the intake pipe 153, the cross-sectional area of ​​the expansion cavity 152 is larger than that of the intake pipe 153; in the axial direction of the exhaust pipe 154, the cross-sectional area of ​​the expansion cavity 152 is larger than that of the exhaust pipe 154. That is, when the noisy gas enters the expansion cavity 152 through the intake pipe 153, the space suddenly expands, the gas flow rate decreases, the pressure decreases, and the noise energy is dispersed and attenuated.

[0073] Among them, such as Figure 4 and Figure 5As shown, the expansion cavity 152 can be either an insertable expansion cavity or a non-insertable expansion cavity. When it is an insertable expansion cavity, at least a portion of the inlet pipe 153 and the outlet pipe 154 are located inside the expansion cavity 152; when it is a non-insertable expansion cavity, the inlet pipe 153 and the outlet pipe 154 are located outside the expansion cavity 152. The insertable expansion cavity can alter the gas flow path and acoustic characteristics within the expansion cavity 152 by inserting a component of a specific shape inside the expansion pipe 151, causing more complex reflections and refractions of the gas within the cavity, thereby enhancing the noise reduction effect. The non-insertable expansion cavity has a relatively simple structure; the gas flows directly within the expansion cavity 152 of the expansion pipe 151, reducing noise through spatial expansion.

[0074] In one embodiment, the volume of the expansion cavity 152 is greater than 5 ml, such as 5 ml, 7 ml, 9 ml, 10 ml, 12 ml, 15 ml, etc. The size of the expansion cavity 152 directly affects its noise reduction performance. A larger expansion cavity 152 volume can provide more space for the noisy gas, further reducing its flow rate and making the pressure change more obvious, thereby enhancing the dispersion and attenuation effect of noise energy. At the same time, a larger volume also facilitates more reflections and refractions of the noisy gas within the cavity, increasing the contact opportunities between the noise and the cavity walls and internal sound-absorbing materials, thus improving noise reduction efficiency.

[0075] The shape of the expansion cavity 152 is not fixed, such as Figure 3 As shown, the shape of the noise-reducing housing can be determined based on the overall structural characteristics of the device; if the overall space allows, the dimensions of the noise-reducing housing can be designed according to the frequency that needs to be silenced, and the dimension feature l corresponds to the frequency f. c The calculation formula is as follows:

[0076] f c =(c / l)(2n+1) / 4 n=0,1,2,3…

[0077] Where c is the speed of sound and n is the resonance order.

[0078] In one embodiment, such as Figure 6As shown, the suction assembly 140 and the air inlet of the noise reducer 150 are connected by a connecting pipe, on which a Helmholtz silencer 170 and / or a quarter-wavelength tube 160 are installed. The Helmholtz silencer 170, based on the principle of resonance, uses a cavity and neck of specific dimensions to match its natural frequency with the low-to-mid-frequency noise generated by the suction assembly 140. When low-to-mid-frequency noise waves enter the Helmholtz silencer 170, resonance is triggered, and noise energy is consumed during the resonance process, thus effectively eliminating low-to-mid-frequency noise. The quarter-wavelength tube 160 utilizes the reflection and interference characteristics of sound waves propagating within the tube. When the tube length is one-quarter the wavelength of the noise wave, the reflected wave and the incident wave are out of phase and interfere with each other to cancel each other out, achieving mid-to-high frequency noise reduction. The installation of these two silencers on the connecting pipe allows for precise noise reduction of the noise generated by the suction assembly 140, compensating for the shortcomings of the expansion tube 151 in handling certain frequency noises, and achieving multi-level and multi-mode noise suppression.

[0079] The diaphragm pump's exhaust port is connected to the noise reducer 150's inlet via a connecting pipe, and a Helmholtz silencer and / or a quarter-wavelength tube are installed on the connecting pipe; and / or, the diaphragm pump's outlet is connected to the noise reducer 150 via a connecting pipe, and a Helmholtz silencer and / or a quarter-wavelength tube are installed on the connecting pipe. Alternatively, the diaphragm pump's exhaust port and outlet can be connected to the noise reducer 150 via the same connecting pipe, requiring only one set of Helmholtz silencer and / or quarter-wavelength tube; or, the diaphragm pump's exhaust port and outlet can be connected to the noise reducer 150 via separate connecting pipes, with one set of Helmholtz silencer and / or quarter-wavelength tube installed on each connecting pipe.

[0080] Among them, such as Figure 6 As shown, the connecting pipe is equipped with a Helmholtz silencer 170 and a quarter-wavelength tube 160, with the quarter-wavelength tube 160 located between the Helmholtz silencer 170 and the suction assembly 140. Since the diaphragm cavity outlet generates a significant amount of high-frequency noise, the quarter-wavelength tube 160 provides initial processing for the high-frequency noise generated by the suction assembly 140. The noise processed by the quarter-wavelength tube 160 then enters the Helmholtz silencer 170, where it further resonates and dissipates low-frequency noise, effectively reducing the noise generated by the suction assembly 140. Of course, the Helmholtz silencer 170 can also be positioned between the quarter-wavelength tube 160 and the suction assembly 140; this disclosure does not impose any limitations on this.

[0081] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A cleaning apparatus, characterized by, include: Equipment body; A cleaning component, which is disposed on the device body, is used to clean the surface to be cleaned; A wastewater tank is mounted on the main body of the equipment. A suction assembly having an air intake port and an exhaust port, wherein the air intake port is connected to the wastewater tank to create negative pressure in the wastewater tank; A noise reducer is connected to the exhaust port so that the airflow discharged from the suction assembly passes through the noise reducer.

2. The cleaning apparatus of claim 1, wherein, The device body includes a device housing, and the noise reducer includes a noise reduction housing; a noise reduction cavity is provided inside the noise reduction housing, or the noise reduction housing is connected to the device housing to form a noise reduction cavity.

3. The cleaning apparatus of claim 1, wherein, The device body includes a device housing, and the device housing is provided with an exhaust port. The exhaust port of the noise reducer is connected to the exhaust port.

4. The cleaning apparatus of claim 1, wherein, The noise reduction device includes an expansion tube having an expansion cavity.

5. The cleaning apparatus of claim 4, wherein, The expansion cavity is filled with noise-reducing medium.

6. The cleaning apparatus of claim 5, wherein, The noise reduction medium includes at least one of glass fiber wool, rock wool, and ceramic wool.

7. The cleaning apparatus of claim 4, wherein, The noise reduction device further includes an air inlet pipe and an air outlet pipe, which are respectively connected to the expansion pipe and communicate with the expansion cavity; Specifically, in the axial direction of the intake pipe, the cross-sectional area of ​​the expansion cavity is larger than the cross-sectional area of ​​the intake pipe; in the axial direction of the exhaust pipe, the cross-sectional area of ​​the expansion cavity is larger than the cross-sectional area of ​​the exhaust pipe.

8. The cleaning apparatus of claim 4 or 7, wherein, The noise reduction device further includes an air inlet pipe and an air outlet pipe, which are respectively connected to the expansion pipe and communicate with the expansion cavity; The air inlet pipe and the air outlet pipe are located outside the expansion cavity, or at least a portion of the air inlet pipe and the air outlet pipe are located inside the expansion cavity.

9. The cleaning apparatus of claim 4, wherein, The volume of the expansion cavity is greater than 5 ml.

10. The cleaning apparatus of claim 1, wherein, The suction assembly includes a diaphragm pump, the diaphragm pump includes a medium chamber, and the suction port and the exhaust port are respectively connected to the medium chamber.

11. The cleaning apparatus of claim 10, wherein, The diaphragm pump also includes a diaphragm cavity, and the diaphragm pump is also provided with an air inlet and an air outlet. The air inlet and the air outlet are respectively connected to the diaphragm cavity, and the air outlet of the diaphragm cavity is connected to the air inlet of the noise reduction device.

12. The cleaning apparatus of claim 11, wherein, The air outlet is connected to the air inlet of the noise reducer via a connecting pipe, and the connecting pipe is equipped with a Helmholtz silencer and / or a quarter-wavelength tube.

13. The cleaning apparatus of claim 1, wherein, The exhaust port is connected to the air inlet of the noise reducer via a connecting pipe, and the connecting pipe is equipped with a Helmholtz silencer and / or a quarter-wavelength tube.

14. The cleaning apparatus of claim 12 or 13, wherein, The connecting pipe is equipped with the Helmholtz silencer and the quarter-wavelength tube, with the quarter-wavelength tube located between the Helmholtz silencer and the suction assembly.

15. The cleaning apparatus of claim 1, wherein, The cleaning equipment also includes: A scraper and a wastewater tank, the scraper being configured to scrape wastewater off the cleaning component, the wastewater tank being configured to collect the wastewater scraped off the cleaning component by the scraper, and the wastewater container being configured to recycle the wastewater in the wastewater tank.

16. The cleaning apparatus of claim 1, wherein, The cleaning device is a roller mop or a tracked mop.

17. The cleaning apparatus of claim 1, wherein, The cleaning equipment is a self-propelled cleaning device.

18. A cleaning system, characterized in that, include: The cleaning equipment according to any one of claims 1 to 17; A base station, which is used to interface with the cleaning equipment.

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