Cleaning machine

Abstract

The utility model relates to the technical field of cleaning, and discloses a cleaning machine which is provided with a dirt suction flow channel used for collecting dirt on a cleaning rolling brush and conveying the dirt into a dirt collecting box, the dirt collecting box is externally connected with a negative pressure air channel, and the dirt suction flow channel comprises a dirt inlet flow channel; the high-frequency noise elimination section and the low-frequency noise elimination section are integrated in the air outlet pipe, so that noise of different frequencies is effectively suppressed, and the noise level of the cleaning machine during working is remarkably reduced. The high-frequency noise elimination section can specially absorb high-frequency noise through a high-frequency noise elimination cavity formed by the inner-layer micropore pipe and the outer-layer sealing sleeve pipe, and harsh noise caused by high-speed air flow is reduced. And meanwhile, the low-frequency noise elimination section can suppress low-frequency noise, so that the whole operation environment is quiet and comfortable. The cleaning machine is reasonable in structural design, concentrated in function and remarkable in effect, the user experience of the cleaning machine is greatly improved, and the cleaning machine is suitable for cleaning operation in various environments and has good application and popularization prospects.

Description

Technical Field

[0001] The present application relates to the field of cleaning technology, and in particular to a cleaning machine. Background Art

[0002] Some existing floor scrubbers wipe the floor with a rotating roller brush. The dirty water left after wet wiping needs to flow through the sewage inlet channel into the sewage collection tank under the action of negative pressure suction. To achieve a good wiping effect and avoid residual water stains on the floor after wiping, it is necessary to promptly suck as much dirty water as possible from the roller brush into the sewage collection tank.

[0003] During the sewage suction process, the fan that provides negative pressure will generate noise pollution, affecting the user experience. Therefore, there is an urgent need for a cleaning machine that can control the noise during sewage suction to a smaller range. Utility Model Content

[0004] In response to the defects in the existing technology, the present application proposes a cleaning machine that integrates a high-frequency silencer section and a low-frequency silencer section in the air outlet duct to achieve effective suppression of noises of different frequencies, thereby significantly reducing the noise level of the cleaning machine when it is working. The high-frequency silencer section forms a high-frequency silencer cavity through the inner microporous tube and the outer sealing tube, which can specifically absorb high-frequency noise and reduce the harsh noise caused by high-speed airflow. At the same time, the low-frequency silencer section can suppress low-frequency noise, making the overall operating environment quieter and more comfortable. This structural design is reasonable, functionally concentrated, and effective, which greatly improves the user experience of the cleaning machine. It is suitable for cleaning operations in a variety of environments and has good prospects for promotion and application.

[0005] To solve the above problems, an embodiment of the present application provides a cleaning machine having a dirt suction flow channel for collecting dirt on a cleaning roller brush and conveying it into a dirt collection box. The dirt collection box is externally connected to a negative pressure air duct, which includes a negative pressure chamber, a fan chamber, and an air outlet pipe connected in sequence along the air flow direction. The air inlet end of the negative pressure chamber is connected to the air outlet end of the dirt collection box.

[0006] The air outlet duct includes a high-frequency silencer section and a low-frequency silencer section. The high-frequency silencer section includes an inner microporous tube and an outer sealing tube. The outer sealing tube is sleeved on the outer wall of the inner microporous tube. There is a gap between the outer sealing tube and the inner microporous tube to form a high-frequency silencer cavity. The inner wall of the inner microporous tube is provided with a number of silencer micropores connected to the high-frequency silencer cavity.

[0007] In a possible embodiment, the inner wall of the low-frequency sound-absorbing section is covered with a porous sound-absorbing layer, the inner side of the porous sound-absorbing layer is lined with a grid fixing net, and the grid fixing net is fixedly connected to the pipe wall of the low-frequency sound-absorbing section.

[0008] In a possible embodiment, both ends of the inner microporous tube are provided with a contraction section in which the cross-sectional area of ​​the tube decreases along the direction of the airflow and an expansion section in which the cross-sectional area of ​​the tube increases along the direction of the airflow;

[0009] The contraction section is connected to the air outlet end of the fan cavity, and the expansion section is connected to the low-frequency silencer section.

[0010] In a possible embodiment, the air outlet duct includes an upper tube body and a lower tube body, which are interlocked and connected to form a closed tube cavity. The upper tube body and the lower tube body located in the high-frequency silencer section are concave to form an inner microporous tube; the outer sealing sleeve is sleeved on the outside of the inner microporous tube.

[0011] In a possible embodiment, the air outlet pipe further includes a pipe opening clamp, which is clamped at the tail end of the low-frequency silencer section to fasten the upper pipe body and the lower pipe body.

[0012] In a possible embodiment, the sewage suction flow channel includes a sewage inlet flow channel;

[0013] The sewage inlet flow channel includes a sewage collecting portion and a sewage delivery pipe; the sewage collecting portion includes a sewage collecting port and a sewage collecting hopper, the sewage collecting port is radially directed toward the cleaning roller brush, the sewage collecting hopper shrinks from the sewage collecting port toward the sewage delivery pipe to connect the sewage collecting port and the sewage delivery pipe, and the sewage delivery pipe extends into the sewage collecting box to connect with the sewage collecting box;

[0014] The sewage collecting port includes a first edge, a second edge and two side arc edges. The two side arc edges are relatively arranged on both sides of the sewage collecting port. The side arc edges have an arc-shaped portion that matches the outer cylindrical surface of the cleaning roller brush. The first edge and the second edge between the two side arc edges are arranged in sequence along the rotation direction of the cleaning roller brush, and the outer edge of the second edge abuts against the outer cylindrical surface of the cleaning roller brush.

[0015] In a possible embodiment, an extrusion arc surface is provided at the outer edge of the second side for abutting the outer cylindrical surface of the cleaning roller brush, and the angle formed by the linear velocity direction of the abutment between the cleaning roller brush and the extrusion arc surface and the tangent of the abutment between the extrusion arc surface and the cleaning roller brush is an acute angle.

[0016] or,

[0017] An inclined extrusion slope is provided at the outer edge of the second side for contacting the outer cylindrical surface of the cleaning roller brush. The angle formed by the linear velocity direction of the contact point between the cleaning roller brush and the extrusion slope and the extrusion slope is an acute angle.

[0018] In a possible embodiment, the second side is located below the first side, and the bottom surface of the sewage collecting hopper connected to the second side is inclined, so that the side of the bottom surface close to the second side is higher than the side of the bottom surface close to the sewage pipe;

[0019] or,

[0020] The first side is located above the second side, and a water baffle extending downward is provided at the second side.

[0021] In a possible embodiment, the sewage pipe has a transparent section with a transparency sensor provided on the transparent section; the end cover of the sewage pipe extending into the sewage collecting box is covered with a one-way cover, one side of which is rotatably connected to the inner side of the sewage collecting box to allow the sewage pipe to flow into the sewage collecting box in a one-way manner.

[0022] In a possible embodiment, sealing rings are provided at the connection between the sewage collecting portion and the sewage delivery pipe, and at the connection between the sewage delivery pipe and the sewage collecting box.

[0023] Compared with the prior art, this application has the following advantages and beneficial effects:

[0024] The present application provides a cleaning machine that effectively suppresses noises of different frequencies by integrating a high-frequency silencer section and a low-frequency silencer section in the air outlet duct, thereby significantly reducing the noise level of the cleaning machine when it is working. The high-frequency silencer section forms a high-frequency silencer cavity through the inner microporous tube and the outer sealing tube, which can specifically absorb high-frequency noise and reduce the harsh noise caused by high-speed airflow. At the same time, the low-frequency silencer section can suppress low-frequency noise, making the overall operating environment quieter and more comfortable. This structural design is reasonable, functionally concentrated, and effective, which greatly improves the user experience of the cleaning machine. It is suitable for cleaning operations in a variety of environments and has good prospects for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 A schematic cross-sectional view of the cleaning machine and its internal sewage suction channel provided in this application;

[0027] Figure 2 This is a schematic diagram of the connection status of the sewage tank and the negative pressure air duct;

[0028] Figure 3 This is the upward axonometric view of the first type of sewage collection part;

[0029] Figure 4 This is the axonometric drawing of the first type of sewage collection part;

[0030] Figure 5 This is the left side view of the first type of sewage collection part;

[0031] Figure 6 This is a schematic diagram of the connection between the sewage collecting part and the water baffle;

[0032] Figure 7 This is the axonometric drawing of the second type of sewage collection part;

[0033] Figure 8 This is a right side view of the second type of sewage collecting part;

[0034] Figure 9 This is a schematic diagram of a transparent section of a sewage pipe with a transparency sensor installed;

[0035] Figure 10 This is the axonometric drawing of the negative pressure air duct;

[0036] Figure 11 This is the exploded view of the negative pressure air duct;

[0037] Figure 12 This is the front view of the air outlet pipe;

[0038] Figure 13 for Figure 12 A cross-sectional view along the A-A' direction;

[0039] Figure 14 for Figure 13 A partial enlarged view of point B in the middle;

[0040] Figure 15 This is the exploded view of the air outlet duct.

[0041] Description of main component symbols:

[0042] 1. Cleaning roller brush; 2. Sewage inlet channel; 21. Sewage collecting part; 211. Sewage collecting port; 2111. First side; 2112. Second side; 21121. Extrusion arc surface; 21122. Extrusion slope; 2113. Side arc edge; 21131. Arc-shaped part; 212. Sewage collecting hopper; 2121. Bottom of hopper; 213. Water baffle; 22. Sewage conveying pipe; 221. Transparent section; 2211. Transparency sensor; 3. Sewage collecting box; 31. One-way cover; 4. Negative pressure air duct; 41. Negative pressure chamber; 42. Fan chamber; 43. Air outlet pipe; 431. High-frequency silencer section; 4311. Inner microporous tube; 43111. Silencing micropores; 43112. Contraction section; 43113. Expansion section; 4312. Outer sleeve tube; 4313. High-frequency silencer chamber; 432. Low-frequency silencer section; 4321. Multi-layer silencer layer; 4322. Grid fixing net; 433. Upper tube body; 434. Lower tube body; 435. Pipe mouth clamp. DETAILED DESCRIPTION

[0043] Hereinafter, various embodiments of the present disclosure will be described more fully. The present disclosure may have various embodiments, and adjustments and changes may be made therein. However, it should be understood that there is no intention to limit the various embodiments of the present disclosure to the specific embodiments disclosed herein, but rather that the present disclosure should be construed to encompass all adjustments, equivalents, and / or alternatives falling within the spirit and scope of the various embodiments of the present disclosure.

[0044] Hereinafter, the terms "include" or "may include" as used in various embodiments of the present disclosure indicate the presence of disclosed functions, operations, or elements, and do not limit the addition of one or more functions, operations, or elements. In addition, as used in various embodiments of the present disclosure, the terms "include," "have," and their cognates are intended only to indicate specific features, numbers, steps, operations, elements, components, or combinations of the foregoing, and should not be understood as excluding the presence of one or more other features, numbers, steps, operations, elements, components, or combinations of the foregoing, or the possibility of adding one or more features, numbers, steps, operations, elements, components, or combinations of the foregoing.

[0045] In various embodiments of the present disclosure, the expression "or" or "at least one of A or / and B" includes any or all combinations of the words listed simultaneously. For example, the expression "A or B" or "at least one of A or / and B" may include A, may include B, or may include both A and B.

[0046] The expressions (such as "first", "second", etc.) used in the various embodiments of the present disclosure may modify the various constituent elements in the various embodiments, but may not limit the corresponding constituent elements. For example, the above expressions do not limit the order and / or importance of the elements. The above expressions are only used to distinguish one element from other elements. For example, a first user device and a second user device indicate different user devices, although both are user devices. For example, without departing from the scope of the various embodiments of the present disclosure, a first element may be referred to as a second element, and similarly, a second element may also be referred to as a first element.

[0047] It should be noted that when a component is described as being “connected” to another component, the first component may be directly connected to the second component, and a third component may be “connected” between the first and second components. Conversely, when a component is described as being “directly connected” to another component, it can be understood that there is no third component between the first and second components.

[0048] The term “user” used in various embodiments of the present disclosure may indicate a person using an electronic device or a device (eg, an artificial intelligence electronic device) using the electronic device.

[0049] The terms used in the various embodiments of the present disclosure are only used to describe the purpose of specific embodiments and are not intended to limit the various embodiments of the present disclosure. As used herein, the singular form is intended to also include the plural form, unless the context clearly indicates otherwise. Unless otherwise specified, all terms used herein (including technical terms and scientific terms) have the same meaning as those generally understood by those skilled in the art to which the various embodiments of the present disclosure belong. The terms (such as those defined in generally used dictionaries) will be interpreted as having the same meaning as the contextual meaning in the relevant technical field and will not be interpreted as having an idealized meaning or an overly formal meaning, unless clearly defined in the various embodiments of the present disclosure.

[0050] Example 1:

[0051] like Figures 1 to 14 As shown, this embodiment provides a suction flow channel for collecting dirt on the cleaning roller brush 1 and transporting it into the dirt collecting box 3. The dirt collecting box 3 is externally connected to a negative pressure air duct 4. Specifically, as shown in the figure and the figure to the figure, the negative pressure air duct 4 includes a negative pressure chamber 41, a fan chamber 42 and an air outlet pipe 43 connected in sequence along the air flow direction. The air inlet end of the negative pressure chamber 41 is connected to the air outlet end of the dirt collecting box 3.

[0052] The air outlet duct 43 includes a high-frequency silencer section 431 and a low-frequency silencer section 432. The high-frequency silencer section 431 includes an inner microporous tube 4311 and an outer sleeve tube 4312. The outer sleeve tube 4312 is sleeved on the outer wall of the inner microporous tube 4311. There is a gap between the outer sleeve tube 4312 and the inner microporous tube 4311 to form a high-frequency silencer cavity 4313. The inner wall of the inner microporous tube 4311 is provided with a number of silencer micropores 43111 connected to the high-frequency silencer cavity 4313.

[0053] In this embodiment, the outer sealing tube 4312 is made of damping material. When the noise passes through the silencer micropores 43111 and enters the high-frequency silencer cavity 4313 and contacts the outer damping material to form vibration, and under the viscoelastic effect of the damping material, part of the noise energy is partially absorbed; and the unabsorbed part enters the high-frequency silencer cavity 4313 through the silencer micropores 43111, causing interference and other effects, further reducing the noise energy.

[0054] like Figure 13 As shown, the inner wall of the low-frequency silencing section 432 is covered with a porous silencing layer 4321 , and the inner side of the porous silencing layer 4321 is lined with a grid fixing net 4322 , which is relatively fixedly connected to the pipe wall of the low-frequency silencing section 432 .

[0055] like Figure 13 and Figure 14As shown, both ends of the inner microporous tube 4311 are provided with a contraction section 43112 whose inner cross-sectional area decreases along the airflow direction and an expansion section 43113 whose inner cross-sectional area increases along the airflow direction;

[0056] The contraction section 43112 is connected to the air outlet end of the fan cavity 42 , and the expansion section 43113 is connected to the low-frequency silencer section 432 .

[0057] In this embodiment, the sudden expansion or contraction of the inner diameter of the pipe causes a convex change in the acoustic impedance in the channel, which changes the propagation direction of the sound wave, causing reflection and interference in the pipe, thereby achieving the purpose of noise reduction.

[0058] like Figure 15 As shown, the air outlet pipe 43 includes an upper tube body 433 and a lower tube body 434, and the upper tube body 433 and the lower tube body 434 are interlocked and connected to each other to close and form a tube cavity. The upper tube body 433 and the lower tube body 434 located in the high-frequency sound-absorbing section 431 are concave to form the inner microporous tube 4311; the outer sealing tube 4312 is sleeved on the outside of the inner microporous tube 4311.

[0059] The air outlet pipe 43 further includes a pipe opening clamp 435 , which is located at the tail end of the low-frequency muffler section 432 to fasten the upper pipe body 433 and the lower pipe body 434 .

[0060] Example 2:

[0061] like Figures 1 to 8 As shown, this embodiment is implemented on the basis of embodiment 1. The sewage suction flow channel includes a sewage inlet flow channel 2. As shown in the figure, the sewage inlet flow channel 2 includes a sewage collecting portion 21 and a sewage delivery pipe 22; the sewage collecting portion 21 includes a sewage collecting port 211 and a sewage collecting hopper 212. The sewage collecting port 211 is radially directed toward the cleaning roller brush 1, and the sewage collecting hopper 212 shrinks from the sewage collecting port 211 toward the sewage delivery pipe 22 to connect the sewage collecting port 211 and the sewage delivery pipe 22. The sewage delivery pipe 22 extends into the sewage collecting box 3 to communicate with the sewage collecting box 3;

[0062] like Figures 3 to 8 As shown, the sewage collecting port 211 includes a first edge 2111, a second edge 2112 and two side arc edges 2113. The two side arc edges 2113 are relatively arranged on both sides of the sewage collecting port 211. The side arc edges 2113 have an arc-shaped portion 21131 that matches the outer cylindrical surface of the cleaning roller brush 1. The first edge 2111 and the second edge 2112 between the two side arc edges 2113 are arranged in sequence along the rotation direction of the cleaning roller brush 1, and the outer edge of the second edge 2112 abuts against the outer cylindrical surface of the cleaning roller brush 1.

[0063] In this embodiment, the outer edge of the second side 2112 abuts against the outer cylindrical surface of the cleaning roller brush 1, so that sewage or dirt can be collected from the outer cylindrical surface of the cleaning roller brush 1 by squeezing or scraping; at the same time, the first side 2111 and the second side 2112 are arranged in sequence along the rotation direction of the cleaning roller brush 1, so that the sewage or dirt collected by the second side 2112 will be trapped between the first side 2111 and the second side 2112, so as to be easily collected by the sewage collection port 211.

[0064] In addition, by setting a sewage collecting port 211 radially toward the cleaning roller brush 1 along the cleaning roller brush 1, the sewage on the cleaning roller brush 1 can be directly captured, thereby improving the sewage collection efficiency; the contraction structure of the sewage collecting hopper 212 connects the sewage collecting port 211 with the sewage delivery pipe 22, so that the transportation path of sewage from the cleaning roller brush 1 to the sewage collecting box 3 is smoother, reducing the risk of sewage retention in the flow channel and improving the smoothness of sewage transportation; the sewage collecting port 211 is designed to include two side arc edges 2113 that match the outer cylindrical surface of the cleaning roller brush 1, and the outer edge of the second edge 2112 abuts against the outer cylindrical surface of the roller brush, ensuring that the sewage collecting port 211 is close to the roller brush surface, enhancing the fit between the sewage collecting structure and the cleaning roller brush 1, reducing leakage or sewage residue, and improving the cleaning effect; the sewage delivery pipe 22 is set to directly extend into the sewage collecting box 3, ensuring the effective connection between the flow channel and the sewage collecting box 3, simplifying the structure, and avoiding the leakage of sewage due to detachment from the flow channel during transportation.

[0065] The rest of this embodiment is the same as that of embodiment 1, so it will not be described again.

[0066] Example 3:

[0067] like Figure 7 and Figure 8 As shown, this embodiment is implemented on the basis of embodiment 2, and an extrusion arc surface 21121 for abutting the outer cylindrical surface of the cleaning roller brush 1 is provided at the outer edge of the second side 2112, and the angle formed by the linear velocity direction of the abutment between the cleaning roller brush 1 and the extrusion arc surface 21121 and the tangent of the abutment between the extrusion arc surface 21121 and the cleaning roller brush 1 is an acute angle.

[0068] In this embodiment, the linear velocity direction of the cleaning roller brush 1 at the point where it abuts the extrusion arc surface 21121 and the angle formed by the tangent of the extrusion arc surface 21121 and the cleaning roller brush 1 at the point where they abut are acute angles, so that the outer cylindrical surface of the cleaning roller brush 1 is approximately tangent to the extrusion arc surface 21121 when in contact, and the cleaning roller brush 1 rotates smoothly and is not easily obstructed.

[0069] The rest of this embodiment is the same as that of embodiment 2, so it will not be described again.

[0070] Example 4:

[0071] like Figures 3 to 6As shown, this embodiment is implemented on the basis of embodiment 2, and an inclined extrusion slope 21122 for abutting the outer cylindrical surface of the cleaning roller brush 1 is provided at the outer edge of the second side 2112, and the angle formed by the linear velocity direction of the cleaning roller brush 1 and the extrusion slope 21122 at the abutment point and the extrusion slope 21122 is an acute angle.

[0072] In this embodiment, the angle formed by the linear velocity direction of the cleaning roller brush 1 at the point of contact with the extrusion bevel 21122 and the extrusion bevel 21122 is an acute angle. This is to avoid excessively large angles, where the scraping effect on the cleaning roller brush 1 becomes greater than the extrusion effect, thereby hindering the rotation of the cleaning roller brush 1 by the extrusion bevel 21122 or damaging the outer cylindrical surface of the cleaning roller brush 1.

[0073] The rest of this embodiment is the same as that of embodiment 2, so it will not be described again.

[0074] Example 5:

[0075] like Figure 7 and Figure 8 As shown, this embodiment is implemented on the basis of embodiment 3 or 4, the second side 2112 is located below the first side 2111, and the bottom surface 2121 of the hopper 212 connected to the second side 2112 is tilted, and the side of the hopper bottom surface 2121 close to the second side 2112 is higher than the side of the hopper bottom surface 2121 close to the sewage pipe 22.

[0076] In this embodiment, the side of the bucket bottom 2121 close to the second side 2112 is higher than the side of the bucket bottom 2121 close to the sewage pipe 22, which facilitates the sewage squeezed out of the cleaning roller 1 to flow into the sewage pipe through the bucket bottom 2121, thereby reducing the leakage of sewage out of the sewage collecting part 21.

[0077] The rest of this embodiment is the same as that of Embodiment 3 or 4, so it will not be described again.

[0078] Example 6:

[0079] like Figures 3 to 6 As shown, this embodiment is further optimized on the basis of embodiment 3 or 4, the first side 2111 is located above the second side 2112, and a water retaining plate 213 extending downward is provided at the second side 2112.

[0080] The water baffle 213 in this embodiment can limit the sewage leaking out of the sewage collecting part 21 between the sewage collecting part 21 and the cleaning roller brush 1, so that the sewage leaking out of the sewage collecting part 21 can be re-absorbed during the rotation of the cleaning roller brush 1 and re-collected by the sewage collecting port 211, thereby avoiding sewage leakage and affecting the cleaning effect of the cleaning machine.

[0081] The rest of this embodiment is the same as that of Embodiment 3 or 4, so it will not be described again.

[0082] Example 7:

[0083] like Figure 9 As shown, this embodiment is implemented on the basis of any one of Embodiments 2 to 6. The sewage pipe 22 has a transparent section 221 , and a transparency sensor 2211 is provided on the transparent section 221 .

[0084] In this embodiment, by setting one end of the sewage pipe 22 as a transparent section 221 and installing a transparency sensor 2211 on the transparent section 221, the transparency sensor 2211 detects the attenuation rate of light when passing through the transparent section 221 and the sewage in the transparent section 221, thereby achieving the purpose of detecting the transparency of the sewage in the transparent section 221, and then the cleanliness of the cleaning roller brush 1 at this time can be estimated by the transparency of the sewage.

[0085] like Figure 1 As shown, the end of the sewage pipe 22 extending into the sewage collecting box 3 is covered with a one-way cover 31, and one side of the one-way cover 31 is rotatably connected to the inner side of the sewage collecting box 3 to allow the sewage pipe 22 to flow into the sewage collecting box 3 in a one-way manner.

[0086] In this embodiment, one side of the one-way cover 31 is rotatably connected to the interior of the sewage collecting box 3. When the negative pressure air duct 4 provides negative pressure, the one-way cover 31 is sucked away from the port of the sewage pipe 22 under the action of the low air pressure inside the sewage collecting box 3. When the negative pressure air duct 4 stops working or turns to provide positive pressure to the sewage collecting box 3, the one-way cover 31 rotates again to cover the port of the sewage pipe 22.

[0087] Furthermore, the connection between the sewage collecting part 21 and the sewage delivery pipe 22, and the connection between the sewage delivery pipe 22 and the sewage collecting box 3 are both provided with sealing rings.

[0088] The rest of this embodiment is the same as any one of Embodiments 2 to 6, so it will not be repeated here.

[0089] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of a preferred implementation scenario, and the modules or processes in the accompanying drawings are not necessarily necessary for implementing the present invention.

[0090] Those skilled in the art will appreciate that the modules in the devices in the implementation scenario can be distributed in the devices of the implementation scenario according to the implementation scenario description, or can be modified accordingly and located in one or more devices different from the implementation scenario. The modules in the above implementation scenario can be combined into one module or further split into multiple submodules.

[0091] The serial numbers of the above utility models are for description only and do not represent the advantages or disadvantages of the implementation scenarios.

[0092] The above disclosures are only a few specific implementation scenarios of the present invention. However, the present invention is not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the scope of protection of the present invention.

Claims

1. A cleaning machine having a dirt suction channel for collecting dirt on a cleaning roller brush and conveying it into a dirt collection box, wherein the dirt collection box is externally connected to a negative pressure air duct, characterized in that: The negative pressure air duct comprises a negative pressure chamber, a fan chamber and an air outlet pipe connected in sequence along the air flow direction, and the air inlet end of the negative pressure chamber is connected to the air outlet end of the dirt collecting box; The air outlet duct includes a high-frequency silencer section and a low-frequency silencer section. The high-frequency silencer section includes an inner microporous tube and an outer sealing tube. The outer sealing tube is sleeved on the outer wall of the inner microporous tube. There is a gap between the outer sealing tube and the inner microporous tube to form a high-frequency silencer cavity. The inner wall of the inner microporous tube is provided with a plurality of silencer micropores connected to the high-frequency silencer cavity.

2. The cleaning machine according to claim 1, characterized in that The inner wall of the low-frequency sound-absorbing section is covered with a porous sound-absorbing layer, the inner side of the porous sound-absorbing layer is lined with a grid fixing net, and the grid fixing net is fixedly connected to the pipe wall of the low-frequency sound-absorbing section.

3. The cleaning machine according to claim 1, characterized in that The two ends of the inner microporous tube are respectively provided with a contraction section in which the cross-sectional area of ​​the tube decreases along the direction of the airflow and an expansion section in which the cross-sectional area of ​​the tube increases along the direction of the airflow; The contraction section is connected to the air outlet end of the fan cavity, and the expansion section is connected to the low-frequency silencer section.

4. The cleaning machine according to claim 1, characterized in that The air outlet pipe includes an upper pipe body and a lower pipe body, and the upper pipe body and the lower pipe body are buckled and connected to each other to close and form a tube cavity. The upper pipe body and the lower pipe body located in the high-frequency sound-absorbing section are concave to form the inner microporous pipe; the outer sealing sleeve is sleeved on the outside of the inner microporous pipe.

5. The cleaning machine according to claim 4, characterized in that The air outlet pipe further includes a pipe mouth clamp, which is secured at the tail end of the low-frequency muffler section to fasten the upper pipe body and the lower pipe body.

6. The cleaning machine according to claim 1, wherein: The sewage suction flow channel includes a sewage inlet flow channel; The sewage inlet flow channel includes a sewage collecting portion and a sewage delivery pipe; the sewage collecting portion includes a sewage collecting port and a sewage collecting hopper, the sewage collecting port is radially directed toward the cleaning roller brush, the sewage collecting hopper is contracted from the sewage collecting port toward the sewage delivery pipe to connect the sewage collecting port and the sewage delivery pipe, and the sewage delivery pipe extends into the sewage collecting box to communicate with the sewage collecting box; The sewage collecting port includes a first edge, a second edge and two side arc edges, and the two side arc edges are relatively arranged on both sides of the sewage collecting port. The side arc edges have an arc-shaped portion that matches the outer cylindrical surface of the cleaning roller brush. The first edge and the second edge between the two side arc edges are arranged in sequence along the rotation direction of the cleaning roller brush, and the outer edge of the second edge abuts against the outer cylindrical surface of the cleaning roller brush.

7. The cleaning machine according to claim 6, characterized in that An extrusion arc surface is provided at the outer edge of the second side for contacting the outer cylindrical surface of the cleaning roller brush. The linear velocity direction of the cleaning roller brush contacting the extrusion arc surface and the tangent line of the extrusion arc surface and the cleaning roller brush contacting the extrusion arc surface form an acute angle. or, An inclined extrusion slope is provided at the outer edge of the second side for contacting the outer cylindrical surface of the cleaning roller brush. The linear velocity direction of the cleaning roller brush contacting the extrusion slope and the angle formed by the extrusion slope are acute angles.

8. The cleaning machine according to claim 6, characterized in that The second side is located below the first side, and the bottom surface of the sewage collecting hopper connected to the second side is inclined, and the side of the bottom surface of the hopper close to the second side is higher than the side of the bottom surface of the hopper close to the sewage pipe; or, The first side is located above the second side, and the second side is provided with a water baffle extending downward.

9. The cleaning machine according to any one of claims 6 to 8, characterized in that The sewage pipe has a transparent section with a transparency sensor on it; the end of the sewage pipe extending into the sewage collecting box is covered with a one-way cover, one side of which is rotatably connected to the inside of the sewage collecting box to allow the sewage pipe to flow into the sewage collecting box in a one-way manner.

10. The cleaning machine according to any one of claims 6 to 8, characterized in that Sealing rings are provided at the connection between the sewage collecting portion and the sewage delivery pipe, and at the connection between the sewage delivery pipe and the sewage collecting box.

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