A duct structure, main unit and cleaning equipment

Abstract

This utility model relates to the field of cleaning equipment technology, and discloses an air duct structure, a main unit, and a cleaning device. The air duct structure includes an air duct housing, within which are: a directional air duct; a first mounting cavity connected to the air inlet end of the directional air duct; and a second mounting cavity located on the side of the air duct housing near the air outlet end of the directional air duct. The second mounting cavity is gas-isolated from the directional air duct. The first mounting cavity within the air duct housing is connected to the air inlet end of the directional air duct. A cleaning component or its connecting pipe is connected to the directional air duct within the first mounting cavity. A dust collection component connected to the air outlet end of the directional air duct is located in the second mounting cavity. The arrangement of the dust collection component does not obstruct the flow area of ​​the directional air duct, ensuring smooth airflow and guaranteeing cleaning efficiency. The air inlet end of the directional air duct only connects to other components within the first mounting cavity. Fewer connecting components reduce costs and the risk of air leakage, improving the overall reliability of the machine.

Description

Technical Field

[0001] This utility model relates to the field of cleaning equipment technology, specifically to an air duct structure, a main unit, and a cleaning equipment. Background Technology

[0002] Vacuum cleaners mainly use the continuous operation of a fan to create a momentary vacuum inside the vacuum cleaner, thereby forming a negative pressure difference with the external atmospheric pressure. Under the action of this pressure difference, air carrying dust is drawn into the vacuum cleaner, where the dust is filtered and collected, and the air is purified by the filter before being discharged from the rear of the machine.

[0003] Vacuum cleaners suffer from poor airflow design, such as a modular structure consisting of multiple interconnected parts. Airflow must pass through several joints, leading to bends and misalignments, resulting in high air resistance and reduced suction efficiency. Furthermore, the need for seals at joints increases manufacturing costs and reduces overall machine reliability. Utility Model Content

[0004] In view of this, the present invention provides a duct structure, a main unit and a cleaning device to solve the problem of high wind resistance caused by unreasonable duct design.

[0005] In a first aspect, this utility model provides an air duct structure suitable for cleaning equipment. The air duct structure includes an air duct housing, and the air duct housing contains: A steering air duct, wherein the steering air duct has an air inlet end and an air outlet end; The first mounting cavity is connected to the air inlet end of the steering air duct; the first mounting cavity is used to connect with the cleaning component or the connecting pipe of the cleaning component. The second mounting cavity is located on the side of the air duct housing near the air outlet end of the steering air duct; a dust and dirt collection component communicating with the air outlet end is located in the second mounting cavity; the second mounting cavity is gas-isolated from the steering air duct.

[0006] Beneficial effects: The first mounting cavity, located within the duct housing, connects to the air inlet of the directional air duct. The cleaning component or its connecting pipe connects to the directional air duct within the first mounting cavity. The dust collection component, connected to the air outlet of the directional air duct, is located in the second mounting cavity. This arrangement of the dust collection component does not obstruct the flow area of ​​the directional air duct, preventing dust cups and other dust collection components from affecting airflow within the duct. Smooth airflow ensures cleaning efficiency. Furthermore, the air inlet of the directional air duct only connects to other components within the first mounting cavity. With fewer connecting components, only one sealing structure is needed to meet sealing requirements, reducing costs, minimizing the risk of leakage, and improving the overall reliability of the machine.

[0007] In one optional embodiment, a sealing mounting groove is provided at the junction of the first mounting cavity and the steering air duct, and a sealing element is provided in the sealing mounting groove.

[0008] Beneficial effects: A sealing mounting groove is provided at the junction of the first mounting cavity and the turning air duct, facilitating the installation and positioning of the seal and improving sealing reliability. The sealing mounting groove prevents seal displacement, ensuring the seal firmly fits against the junction surface of the first mounting cavity and the turning air duct, forming a tight seal. This significantly reduces the possibility of airflow leakage from the joint gap, ensuring stable airflow pressure within the duct. The sealing mounting groove also makes seal installation more directional, allowing assembly to be completed without complex adjustments. This simplifies the sealing structure, reduces operational difficulty during production assembly, and improves assembly efficiency.

[0009] In one optional embodiment, the inner wall of the first mounting cavity is provided with a guide structure, the guide structure comprising: A guide groove is provided that extends axially along the first mounting cavity.

[0010] Beneficial effects: The guide groove provides clear axial guidance when the cleaning component or its connecting pipe is inserted into the first mounting cavity, avoiding misalignment and jamming during docking. This ensures that the component quickly and accurately docks with the air inlet of the steering duct, reducing assembly and adjustment time and improving assembly efficiency during production or maintenance. After the cleaning component or connecting pipe is inserted, its outer wall can fit against the side wall of the guide groove, limiting the component's radial sway or misalignment. This ensures a stable connection position between the component and the steering duct after docking, preventing misalignment and seal failure due to vibration or other factors, further guaranteeing seal reliability.

[0011] In one optional implementation, the guide structure further includes: The guide rib is located in the first mounting cavity near the outer side of the air duct housing.

[0012] Beneficial effects: The guide ribs can mate with the circumferential surface of the cleaning component or its connecting pipes to radially limit the cleaning component or its connecting pipes, thereby improving the reliability of the installation.

[0013] In one optional embodiment, a button notch is provided on the top side of the first mounting cavity.

[0014] Beneficial effects: The button notch provides a clearance and fit structure for the buttons on the cleaning components or their connecting pipes, making it easier to install the cleaning components or their connecting pipes and also easier to operate the buttons.

[0015] In one optional embodiment, a sealing ring rib is provided at the junction of the second mounting cavity and the steering air duct.

[0016] Beneficial effects: As the part of the duct housing that directly abuts against the sealing gasket, the sealing ring rib improves the reliability of the sealing connection. As an annular protrusion, the sealing ring rib concentrates pressure on the annular contact line when in contact with the sealing gasket. Compared to planar contact, this significantly increases the local compression of the sealing gasket, forming a tighter line seal. This effectively prevents airflow leakage from the joint gap, avoiding suction loss or dust overflow caused by air leakage between the dust collection components and the deflecting duct. Furthermore, the contour of the sealing ring rib provides circumferential restraint to the sealing gasket, constraining its installation position and preventing gasket misalignment and curling due to vibrations, airflow impacts, or assembly errors during cleaning equipment operation. This ensures the sealing gasket always covers the critical sealing area, maintaining long-term sealing effectiveness.

[0017] In one optional embodiment, the duct housing further includes: The third mounting cavity is isolated on the adjacent side of the first mounting cavity; the third mounting cavity is used to install a power connector.

[0018] Beneficial effects: The installation of sealed structures often comes with potential failure risks. The isolation of the third mounting cavity inside the duct housing from the steering duct fundamentally avoids the necessity of installing a sealed structure between the two, naturally eliminating the problem of seal failure in this area. It prevents airflow leakage caused by poor sealing from affecting suction power, and prevents dust and dirt from entering the electrical connector area through gaps, causing short circuits or poor contact and other malfunctions. This significantly improves the reliability of the duct structure and the electrical connector.

[0019] In one alternative embodiment, the third mounting cavity is formed within the second mounting cavity.

[0020] Beneficial effects: The second mounting cavity itself is used to house the dust and dirt collection components. Integrating the third mounting cavity within it makes full use of the unused space in the second mounting cavity, avoiding the need for a separate cavity on the duct housing. This reduces the complexity and volume of the overall structure, resulting in a more compact duct housing layout that meets the miniaturization design requirements of cleaning equipment. Furthermore, the second mounting cavity itself is vapor-isolated from the steering duct, and the third mounting cavity is nested within it. The isolation properties of the second mounting cavity can be directly utilized, eliminating the need for a separate sealing structure between the third mounting cavity and the steering duct. This further reduces the number of sealing components, lowers costs, and reduces the risk of seal failure.

[0021] In one optional embodiment, a limiting boss is provided at the end of the third mounting cavity to limit the displacement of the power connector along the axial direction of the first mounting cavity.

[0022] Beneficial effects: When the power connector is installed in place, the limiting boss can block the power connector and prevent it from slipping out of the third mounting cavity; since the power connector can no longer move after moving to the limiting boss, it can also give the user a sense of being in place.

[0023] In one optional embodiment, a limiting buckle is provided in the third mounting cavity, the limiting buckle being used to engage with the hook on the power connector for limiting positioning.

[0024] Effective effect: During installation, the power connector is pushed into the third mounting cavity. When the hook on the power connector moves to the position of the limit buckle, it squeezes the limit buckle and causes it to deform elastically. This allows the hook to overcome the resistance of the limit buckle and pass over it. After the limit buckle resets, it engages with the hook, thus achieving the limiting and fixing of the centered power connector.

[0025] In one optional embodiment, the duct housing further includes: The fourth mounting cavity is isolated on the side of the steering duct away from the first and second mounting cavities; the fourth mounting cavity is used to mount the control device.

[0026] Beneficial Effects: The steering duct and the first and second mounting chambers are core areas for airflow and dust collection, potentially subject to dust, moisture, airflow impact, and vibration. The fourth mounting chamber is completely separated from these areas through an isolation design, physically blocking the direct intrusion of dust and moisture into the control devices. This prevents short circuits caused by dust accumulation, malfunctions caused by moisture erosion, or the impact of airflow vibration on the stability of precision electronic components, significantly improving the operational safety and lifespan of the control devices. Since the fourth mounting chamber is isolated from the steering duct and related functional chambers, there is no need for airflow exchange between them, nor is there any leakage problem caused by pressure difference. Therefore, there is no need to install a sealing structure between the fourth mounting chamber and other chambers. This reduces the use of sealing components and avoids problems that may arise from seal failure.

[0027] In one optional embodiment, a support column is provided in the fourth mounting cavity, the support column being used to support the control device. Beneficial effects: The support column provides rigid support for the control device, ensuring it does not shift, deform, or collide with the cavity wall during cleaning equipment operation. The support column isolates the control device from the inner wall of the fourth mounting cavity, creating an air gap. This gap reduces the direct impact of vibrations transmitted from the cavity wall on the control device, improving its operational reliability.

[0028] In one optional embodiment, the air duct housing has a push-button mounting structure on the top surface corresponding to the fourth mounting cavity for mounting the sliding push-button assembly of the cleaning equipment.

[0029] Beneficial effects: Integrating the push-button mounting structure into the duct housing eliminates the need for a separate mounting bracket or independent housing for the sliding push-button assembly. The push-button mounting structure is directly molded into the duct housing as a single piece, reducing the number of parts and assembly steps, lowering production and assembly costs. It also allows for a more compact internal layout of the cleaning equipment, adapting to miniaturization design requirements. Furthermore, the push-button mounting structure is located on the top surface of the duct housing corresponding to the fourth mounting cavity, avoiding interference during the disassembly and assembly of dust collection components. It also allows for placement of the sliding push-button assembly in an easily accessible and effortless position, depending on the grip or placement posture of the equipment.

[0030] In one optional embodiment, the push button mounting structure includes: The push button mounting groove is formed by recessing the air duct housing towards the fourth mounting cavity; A sliding groove is located between the push button mounting groove and the top surface of the air duct housing.

[0031] Beneficial effects: The air duct housing is recessed towards the fourth mounting cavity to form the push button mounting groove, which effectively utilizes the space of the fourth mounting cavity and facilitates signal connection with the control device in the fourth mounting cavity.

[0032] In one alternative embodiment, the duct housing is integrally formed.

[0033] Beneficial effects: The one-piece molding method greatly reduces the number of parts, eliminates the need for assembly, and improves the assembly efficiency of the main unit; the air duct housing integrates multiple functions such as air duct, sealing, control and docking, and improves structural strength and sealing performance while simplifying the structure. Secondly, this utility model also provides a host computer, comprising: Dust and dirt collection components; In any of the above-described air duct structures, the dust and dirt collection component is installed on the side of the air duct housing near the second mounting cavity.

[0034] Beneficial effects: Since the main unit includes the air duct structure of this utility model, it has the same technical effects as the air duct structure, which will not be described in detail here.

[0035] In one optional embodiment, the duct structure further includes: The lower cover assembly is detachably embedded in the second mounting cavity; the lower cover assembly includes a lower cover body and an air inlet protruding from the lower cover body; the dust and dirt collection component is installed to the air duct housing through the lower cover assembly.

[0036] Beneficial Effects: The lower cover assembly serves as a transitional mounting carrier between the dust collection component and the duct housing, facilitating the installation of the dust collection component onto the duct housing. The air inlet protrudes from the lower cover body, allowing for precise alignment and connection with the air outlet of the directional duct, forming a regular airflow channel. The lower cover assembly is integrally embedded, achieving a stable fit with the second mounting cavity through its own structure. Combined with a sealing gasket, it quickly achieves a sealed connection between the air inlet and the directional duct, preventing airflow leakage and suction loss. The lower cover assembly can be specifically designed with a sealing structure. Compared to the dust collection component directly connecting to the duct housing, the sealing structure is easier to standardize, has stronger adaptability, and reduces the risk of seal failure. The lower cover assembly integrates the functions of a mounting carrier and an air inlet channel, eliminating the need for separate complex installation interfaces and air inlet structures on the duct housing or dust collection component. This simplifies the structural design of both, reducing mold development and processing costs. During assembly, the lower cover assembly and dust collection component can be pre-assembled as a single unit before being integrally embedded into the second mounting cavity, reducing scattered assembly steps and improving assembly efficiency.

[0037] In one optional embodiment, the lower cover assembly further includes: A sealing gasket is disposed at the junction of the air inlet of the lower cover assembly and the air outlet of the steering duct.

[0038] Beneficial effects: Tiny gaps exist at the interface between the air inlet and the outlet of the directional air duct (such as machining errors or assembly clearances). The sealing gasket can fill these gaps through its own elastic compression, forming a complete sealing barrier and preventing airflow leakage at the interface. This ensures that all airflow from the directional air duct enters the dust collection component through the air inlet, avoiding suction loss due to leakage and guaranteeing stable cleaning efficiency.

[0039] In one alternative embodiment, the sealing gasket comprises: The air guide section has a funnel-shaped airflow guiding structure; A sealing boss is provided at the upper end of the air guide section and is pressed together with the air inlet of the lower cover assembly; The wind deflector is openable and closable and is located near the sealing boss in the air guide section.

[0040] Beneficial Effects: The flared airflow structure allows airflow to smoothly enter the dust collection component through the air inlet. The sealing boss presses tightly against the air inlet of the lower cover assembly. Compared to a flat seal, the sealing boss structure concentrates the pressure on the contact surface, increasing the compression and contact pressure of the sealing gasket. This effectively prevents airflow and dust from leaking through the air inlet gaps, ensuring a good seal. When the cleaning equipment is working (suction), the airflow pressure can open the baffle, without affecting the normal entry of airflow into the dust collection component. When the equipment stops (suction disappears), the baffle automatically resets and closes, preventing dust and debris collected in the dust collection component from flowing back into the duct and cleaning components (such as the nozzle) due to gravity or airflow backflow, avoiding secondary pollution and suction loss. After the baffle closes, it forms a temporary seal, reducing leakage of residual airflow in the duct. When the equipment is turned on again, negative pressure can be quickly established, improving the response speed of immediate suction upon startup. At the same time, it prevents external impurities from entering the duct through the air inlet, ensuring the cleanliness of the sealing structure and duct components.

[0041] In one alternative implementation, the host further includes: The rear cover is detachably installed on the air duct housing and the dust collection component.

[0042] Beneficial effects: The rear cover can completely cover the connection area and exposed parts of the air duct housing and dust collection components, forming a closed protective barrier and isolating it from the outside world.

[0043] Thirdly, this utility model also provides a cleaning device, including the host unit described in any of the above.

[0044] Beneficial effects: Since the cleaning equipment includes the main unit of this utility model, it has the same technical effects as the main unit, which will not be described in detail here.

[0045] In one alternative implementation, the cleaning device is a vacuum cleaner.

[0046] Beneficial effects: The main unit of the vacuum cleaner adopts the air duct structure of this utility model. The first mounting cavity located in the air duct housing is connected to the air inlet end of the directional air duct. The cleaning component or the connecting pipe of the cleaning component is connected to the directional air duct in the first mounting cavity, while the dust and dirt collection component is located in the second mounting cavity. The arrangement of the dust and dirt collection component does not obstruct the flow area of ​​the directional air duct, and the airflow is smooth, which can ensure cleaning efficiency. The air inlet end of the directional air duct only connects to other components in the first mounting cavity. Since there are few connecting components, only one sealing structure is required to meet the sealing requirements, which reduces costs and effectively reduces the risk of air leakage, thereby improving the overall reliability of the vacuum cleaner. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0048] Figure 1 This is a cross-sectional view of a handheld vacuum cleaner suitable for mounting on a push rod in the related art; Figure 2 This is a cross-sectional view of a vacuum cleaner host in the related art; Figure 3 This is a perspective view of the main unit of a cleaning device according to an embodiment of the present utility model; Figure 4 This is an exploded structural diagram of the main unit of a cleaning device according to an embodiment of the present utility model; Figure 5 This is a three-dimensional structural diagram of a duct housing according to an embodiment of the present utility model; Figure 6 This is a cross-sectional structural schematic diagram of a duct housing according to an embodiment of the present utility model; Figure 7 This is an exploded structural diagram of a duct housing and lower cover assembly according to an embodiment of the present utility model; Figure 8 This is a cross-sectional view of the connection structure between the air duct housing and the lower cover assembly according to an embodiment of the present utility model; Figure 9 This is an exploded structural diagram of a duct shell and an electrical connector according to an embodiment of the present utility model; Figure 10 This is a cross-sectional view of the connection structure between the air duct housing and the power connector according to an embodiment of the present utility model; Figure 11 This is an exploded structural diagram of a duct housing, an electrical connector, a seal, and a connecting pipe according to an embodiment of the present utility model. Figure 12 This is a cross-sectional view of the connection structure of a duct housing, an electrical connector, a seal, and a connecting pipe according to an embodiment of this utility model. Figure 13 This is an exploded structural diagram of a duct housing, a lower cover assembly, and a dust cup according to an embodiment of the present utility model; Figure 14 This is a cross-sectional view of the connection structure of the air duct housing, lower cover assembly and dust cup according to an embodiment of the present utility model. The arrows in the figure indicate the airflow path. Figure 15 This is an exploded structural diagram of a duct housing and sliding push button assembly according to an embodiment of the present utility model; Figure 16 This is a cross-sectional view of the connection structure between the air duct housing and the sliding push button assembly according to an embodiment of the present utility model; Figure 17 This is an exploded structural diagram of a duct housing, rear housing, sliding push button assembly, and control device according to an embodiment of the present utility model. Figure 18 This is a cross-sectional view of the connection structure between the air duct housing, the rear housing, the sliding push button assembly, and the control device according to an embodiment of the present utility model. Figure 19 This is a cross-sectional view of the main unit of a cleaning device according to an embodiment of the present utility model.

[0049] Explanation of reference numerals in the attached figures: 1. Connect the pipes; 1a. Positioning rib; 1b. Button clip; 2. Electrical connector; 2a. Hook; 2b. Limiting end face; 3. Sealing components; 4. Duct housing; 4a. First mounting cavity; 4b. Third mounting cavity; 4c. Steering air duct; 4d. Guide rib; 4e. Guide groove; 4f. Button notch; 4g. Sealing mounting groove; 4h. Limit buckle; 4i. Limit boss; 4j. Sealing ring rib; 4k. Lower cover fixing stud; 4l. Push button mounting groove; 4m. Sliding groove; 4n. Rear shell fixing stud; 4o. Support column; 4p. Second mounting cavity; 4q. Fourth mounting cavity; 5. Sealing gasket; 5a. Sealing boss; 5b. Air guide; 5c. Wind deflector; 6. Lower cover assembly; 6a. Screw countersunk; 6b. Air inlet; 7. Dust collection components; 8. Sliding push button assembly; 9. Screws; 10. Control devices; 11. Back cover. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0051] In the description of this utility model, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0052] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0053] In related technologies, air ducts are mostly modular structures, composed of multiple interconnected components. Airflow must pass through multiple connection points, leading to problems such as bends and misalignments. For example... Figure 1 As shown, a handheld vacuum cleaner suitable for mounting on a push rod includes a main unit 1 with a built-in vacuum generator 8, a dust cup 2, a battery pack 7, and a handle 3. The dust cup 2 is located at the front end of the main unit 1, the handle 3 is located at the rear end of the main unit 1, and the battery pack 7 is located inside the handle 3. An air inlet 21 is provided at the lower end of the dust cup 2, and an air inlet duct 4, which is horizontally arranged and communicates with the air inlet 21, is provided below the dust cup 2. The dust cup 2 is detachably mounted at the front end of the main unit 1 and detachably connected to the air inlet duct 4. This embedded structure of the dust cup 2 will create an obstruction at the suction port 42 of the air inlet end 41 (as shown by position F in the figure), resulting in high air resistance.

[0054] like Figure 2As shown, a vacuum cleaner main unit in the related technology includes a main unit housing 10. The front end of the main unit housing 10 has a dust cup mounting port 70 and an air inlet 30 extending outward from one side of the dust cup mounting port 70. An air inlet duct is provided inside the air inlet 30. The air inlet duct includes a first air inlet section 1301 extending inward along the air inlet 30 and a second air inlet section 1302 connected to the end of the first air inlet section 1301. The second air inlet section 1302 bends relative to the first air inlet section 1301 towards the side where the dust cup mounting port 70 is located, and the second air inlet section 1302 extends along the tangential direction of the dust cup 80 installed in the dust cup mounting port 70 to connect with the dust cup 80. In this type of main unit front-end duct, a suction port fitting 60 is connected to the duct housing 130 to form the duct. A suction port sealing gasket 601 seals the duct and is locked to the air inlet 30 with screws 9 to form a joint installation structure. This type of sealed duct uses many parts, is complex to assemble, and... Figure 2 At the location shown in E, the three parts—the dust suction port 60, the first air inlet section 130, and the air inlet part 30—are connected at the seal, which makes them prone to air leakage.

[0055] The following is combined Figures 3 to 19 The following describes embodiments of the present invention.

[0056] According to an embodiment of the present invention, in one aspect, an air duct structure suitable for cleaning equipment is provided, the air duct structure including an air duct housing 4, wherein the air duct housing 4 is provided with: A steering air duct 4c, wherein the steering air duct 4c has an air inlet end and an air outlet end; The first mounting cavity 4a is connected to the air inlet end of the steering air duct 4c; the first mounting cavity 4a is used to connect with the cleaning component or the connecting pipe 1 of the cleaning component. The second mounting cavity 4p is located on the side of the air duct housing 4 near the air outlet end of the steering air duct 4c; a dust and dirt collection component communicating with the air outlet end is located at the second mounting cavity 4p; the second mounting cavity 4p is gas-isolated from the steering air duct 4c.

[0057] The first mounting cavity 4a, located within the air duct housing 4, connects to the air inlet of the turning air duct 4c. The cleaning component or its connecting pipe 1 connects to the turning air duct 4c within the first mounting cavity 4a. The dust collection component 7, connected to the air outlet of the turning air duct 4c, is located in the second mounting cavity 4p. This arrangement of the dust collection component 7 does not obstruct the flow area of ​​the turning air duct 4c, preventing dust cups and other dust collection components from affecting airflow within the duct. Smooth airflow ensures cleaning efficiency. Furthermore, the air inlet of the turning air duct 4c only connects to other components within the first mounting cavity 4a. With fewer connecting components, only one sealing structure is needed to meet sealing requirements, reducing costs, minimizing the risk of leakage, and improving the overall reliability of the machine.

[0058] In some embodiments, a sealing mounting groove 4g is provided at the junction of the first mounting cavity 4a and the steering air duct 4c, and a sealing element 3 is provided in the sealing mounting groove 4g.

[0059] A sealing mounting groove 4g is provided at the junction of the first mounting cavity 4a and the turning air duct 4c to facilitate the installation and positioning of the seal 3, thereby improving sealing reliability. The sealing mounting groove 4g prevents the seal 3 from shifting, ensuring it fits firmly against the junction surface of the first mounting cavity 4a and the turning air duct 4c, forming a tight seal. This significantly reduces the possibility of airflow leakage from the junction gaps, ensuring stable airflow pressure within the duct. The sealing mounting groove 4g also makes the installation of the seal 3 more directional, allowing assembly to be completed without complex adjustments. This simplifies the sealing structure, reduces operational difficulty during production assembly, and improves assembly efficiency.

[0060] In some embodiments, the inner wall of the first mounting cavity 4a is provided with a guide structure, the guide structure comprising: The guide groove 4e extends axially along the first mounting cavity 4a.

[0061] The guide groove 4e provides clear axial guidance when the cleaning component or its connecting pipe 1 is inserted into the first mounting cavity 4a, avoiding misalignment and jamming during docking. This ensures that the component quickly and accurately docks with the air inlet end of the steering duct 4c, reducing assembly and adjustment time and improving assembly efficiency during production or maintenance. After the cleaning component or connecting pipe 1 is inserted, its positioning rib 1a can fit against the side wall of the guide groove 4e, limiting the component's wobbling or misalignment in the radial direction. This ensures a stable connection position between the component and the steering duct 4c after docking, preventing misalignment and seal failure of the seal 3 due to vibration or other factors, further guaranteeing seal reliability.

[0062] In some embodiments, the guide structure further includes: The guide rib 4d is located in the first mounting cavity 4a near the outer side of the air duct housing 4.

[0063] The guide rib 4d can mate with the circumferential surface of the cleaning component or its connecting pipe 1 to radially limit the cleaning component or its connecting pipe 1, thereby improving the reliability of the installation.

[0064] In some embodiments, a button notch 4f is provided on the top side of the first mounting cavity 4a.

[0065] The button notch 4f provides a clearance and fit structure for the button buckle 1b on the cleaning component or its connecting pipe 1, which facilitates the installation of the cleaning component or its connecting pipe 1 and also facilitates the operation of the button buckle 1b.

[0066] In some embodiments, a sealing ring rib 4j is provided at the junction of the second mounting cavity 4p and the steering air duct 4c.

[0067] The sealing ring rib 4j, as the part of the air duct housing 4 that directly abuts against the sealing gasket 5, improves the reliability of the sealing connection. As an annular protrusion, the sealing ring rib 4j concentrates pressure on the annular contact line when in contact with the sealing gasket 5. Compared with planar contact, this significantly increases the local compression of the sealing gasket 5, forming a tighter line seal. This effectively blocks airflow leakage from the connection gap, preventing suction loss or dust overflow caused by air leakage between the dust collection component 7 and the turning air duct 4c. In addition, the contour of the sealing ring rib 4j can circumferentially limit the sealing gasket 5, constraining its installation position and preventing the sealing gasket 5 from shifting or curling due to vibration, airflow impact, or assembly errors during the operation of the cleaning equipment. This ensures that the sealing gasket 5 always covers the critical sealing area, maintaining long-term sealing effectiveness.

[0068] In some embodiments, the air duct housing 4 is further provided with: The third mounting cavity 4b is isolated on the adjacent side of the first mounting cavity 4a; the third mounting cavity 4b is used to install the power connector 2.

[0069] The installation of a sealing structure often comes with the potential risk of failure. The isolation between the third mounting cavity 4b inside the duct housing 4 and the turning duct 4c eliminates the need for a sealing structure between them, naturally eliminating the problem of seal failure in this area. It also prevents airflow leakage caused by poor sealing from affecting suction power and prevents dust and dirt from entering the area of ​​the power connector 2 through gaps, causing short circuits or poor contact, thus significantly improving the reliability of the duct structure and the operation of the power connector 2.

[0070] In some embodiments, the third mounting cavity 4b is formed within the second mounting cavity 4p.

[0071] The second mounting cavity 4p is used to house the dust and dirt collection component 7. Integrating the third mounting cavity 4b within it makes full use of the unused space in the second mounting cavity 4p, avoiding the need for a separate cavity on the duct housing 4. This reduces the complexity and volume of the overall structure, making the duct housing 4 more compact and adaptable to the miniaturization design requirements of cleaning equipment. Furthermore, the second mounting cavity 4p is vapor-isolated from the steering duct 4c, and the third mounting cavity 4b is nested within it. The isolation properties of the second mounting cavity 4p can be directly utilized, eliminating the need for a separate sealing structure between the third mounting cavity 4b and the steering duct 4c. This further reduces the number of sealing components, lowers costs, and reduces the risk of seal failure.

[0072] In some embodiments, a limiting boss 4i is provided at the end of the third mounting cavity 4b to limit the displacement of the power connector 2 along the axial direction of the first mounting cavity 4a.

[0073] When the power connector 2 is installed in place, the limiting end face 2b of the power connector 2 abuts against the limiting boss 4i. The limiting boss 4i blocks the power connector 2, preventing the power connector 2 from slipping off the third mounting cavity 4b. Since the power connector 2 can no longer move after moving to the limiting boss 4i, it can also give the user a sense of being in place.

[0074] In one embodiment, a limiting buckle 4h is provided in the third mounting cavity 4b, and the limiting buckle 4h is used to engage with the hook 2a on the power connector 2 for limiting.

[0075] During installation, the power connector 2 is pushed into the third mounting cavity 4b. When the hook 2a on the power connector 2 moves to the position of the limit buckle 4h, it squeezes the limit buckle 4h to cause it to deform elastically. This allows the hook 2a to overcome the resistance of the limit buckle 4h and pass over it. After the limit buckle 4h resets, it engages with the hook 2a, thus achieving the limiting and fixing of the centered power connector 2.

[0076] In some embodiments, the air duct housing 4 is further provided with: The fourth mounting cavity 4q is isolated on the side of the steering air duct 4c away from the first mounting cavity 4a and the second mounting cavity 4p; the fourth mounting cavity 4q is used to mount the control device 10.

[0077] The steering duct 4c, the first mounting cavity 4a, and the second mounting cavity 4p are the core areas for airflow and dust collection, and may be subject to factors such as dust, moisture, airflow impact, and vibration. The fourth mounting cavity 4q is completely separated from this area through an isolation design, physically blocking the path for dust and moisture to directly intrude into the controller 10. This avoids short circuits caused by dust accumulation, malfunctions caused by moisture erosion, or the impact of airflow vibration on the stability of precision electronic components, significantly improving the operational safety and service life of the controller 10. Since the fourth mounting cavity 4q is isolated from the steering duct 4c and related functional chambers, there is no need for airflow communication between them, nor is there any leakage problem caused by air pressure difference. Therefore, there is no need to set a sealing structure between the fourth mounting cavity 4q and other cavities. This reduces the use of sealing components and avoids problems that may be caused by seal failure.

[0078] In some embodiments, a support column 4o is provided in the fourth mounting cavity 4q, and the support column 4o is used to support the control device 10. The support column 4o provides rigid support for the control device 10, ensuring that it will not shift, deform, or collide with the cavity wall during the operation of the cleaning equipment. The support column 4o isolates the control device 10 from the inner wall of the fourth mounting cavity 4q, forming a certain air gap. This gap reduces the direct impact of vibration transmitted from the cavity wall on the control device 10, improving the operational reliability of the control device 10.

[0079] In some embodiments, the top surface of the air duct housing 4 corresponding to the fourth mounting cavity 4q is provided with a push-button mounting structure for mounting the sliding push-button assembly of the cleaning equipment.

[0080] The push-button mounting structure is also integrated into the air duct housing 4, eliminating the need for a separate mounting bracket or independent housing for the sliding push-button assembly 8. The push-button mounting structure is directly molded as a single piece on the air duct housing 4, reducing the number of parts and assembly steps, lowering production and assembly costs, and allowing for a more compact internal layout of the cleaning equipment, adapting to miniaturization design requirements. Moreover, the push-button mounting structure is located on the top surface of the air duct housing 4 corresponding to the fourth mounting cavity 4q, avoiding interference during the disassembly and assembly of the dust collection component 7, and allowing the sliding push-button assembly 8 to be positioned in a more easily accessible and effortless manner depending on the gripping or placement posture of the equipment.

[0081] In some embodiments, the push button mounting structure includes: Push button mounting groove 4l, the air duct housing 4 is recessed in the direction of the fourth mounting cavity 4q to form the push button mounting groove 4l; The sliding groove 4m is located between the push button mounting groove 4l and the top surface of the air duct housing 4.

[0082] The air duct housing 4 is recessed towards the fourth mounting cavity 4q to form the push button mounting groove 4l, which effectively utilizes the space of the fourth mounting cavity 4q and facilitates signal connection with the control device 10 inside the fourth mounting cavity 4q.

[0083] In some embodiments, the air duct housing 4 is integrally formed.

[0084] The one-piece molding method significantly reduces the number of parts, eliminates the need for assembly, and improves the assembly efficiency of the main unit; the air duct housing 4 integrates multiple functions such as air duct, sealing, control and docking, and improves structural strength and sealing performance while simplifying the structure. According to an embodiment of the present invention, another aspect provides a host computer, comprising: Dust and dirt collection component 7; The air duct structure has the dust and dirt collection component 7 installed on the side of the air duct housing 4 near the second mounting cavity 4p.

[0085] Since the main unit includes the air duct structure of this utility model, it has the same technical effects as the air duct structure, which will not be described in detail here.

[0086] In some embodiments, the duct structure further includes: The lower cover assembly 6 is detachably embedded in the second mounting cavity 4p; the lower cover assembly 6 includes a lower cover body and an air inlet 6b protruding from the lower cover body; the dust and dirt collection component 7 is installed to the air duct housing 4 through the lower cover assembly 6.

[0087] The lower cover assembly 6 serves as a transitional mounting carrier between the dust collection component 7 and the air duct housing 4. It facilitates the installation of the dust collection component 7 onto the air duct housing 4. The air inlet 6b protrudes from the lower cover body, allowing for precise alignment and connection with the air outlet of the steering air duct 4c, forming a regular airflow channel. The lower cover assembly 6 is integrally embedded, achieving a stable fit with the second mounting cavity 4p through its own structure. Combined with the sealing gasket 5, it quickly achieves a sealed connection between the air inlet 6b and the steering air duct 4c, preventing airflow leakage and suction loss. The lower cover assembly 6 can be specifically designed with a sealing structure. Compared to the dust collection component 7 directly connecting to the air duct housing 4, the sealing structure is easier to standardize, has stronger adaptability, and reduces the risk of seal failure. The lower cover assembly 6 integrates the functions of a mounting carrier and an air inlet channel, eliminating the need for separate complex mounting interfaces and air inlet structures on the air duct housing 4 or the dust collection component 7. This simplifies the structural design of both components and reduces mold development and processing costs. During assembly, the lower cover assembly 6 and the dust collection component 7 can be pre-assembled into one unit, and then the whole assembly can be embedded into the second mounting cavity 4p, reducing the number of scattered assembly steps and improving assembly efficiency.

[0088] In some embodiments, the lower cover assembly 6 further includes: A sealing gasket 5 is disposed at the junction of the air inlet 6b of the lower cover assembly 6 and the air outlet of the steering duct 4c.

[0089] There are minute gaps (such as machining errors or assembly clearances) at the mating surfaces of the air inlet 6b and the air outlet of the directional air duct 4c. The sealing gasket 5 can fill these gaps through its own elastic compression, forming a complete sealing barrier to prevent airflow leakage from the mating point. This ensures that all the airflow output from the directional air duct 4c enters the dust and dirt collection component 7 through the air inlet 6b, avoiding suction loss due to air leakage and ensuring stable cleaning efficiency.

[0090] In some embodiments, the sealing gasket 5 includes: The air guide section 5b has a funnel-shaped air guide structure; A sealing boss 5a is provided at the upper end of the air guide 5b and is pressed together with the air inlet 6b of the lower cover assembly 6. The wind deflector 5c is openable and closable and is located on the air guide 5b near the sealing boss 5a.

[0091] The flared airflow structure allows airflow to smoothly pass through the air inlet 6b into the dust collection component 7. The sealing boss 5a presses tightly against the air inlet 6b of the lower cover assembly 6. Compared to a flat seal, the sealing boss 5a structure concentrates the pressing force on the contact surface, increasing the compression and contact pressure of the sealing gasket 5, effectively preventing airflow and dust from leaking out of the gap in the air inlet 6b, ensuring a good seal. When the cleaning equipment is working (suction), the airflow pressure can push open the baffle 5c, without affecting the normal entry of airflow into the dust collection component 7. When the equipment stops (suction disappears), the baffle 5c automatically resets and closes, preventing the dust and debris collected in the dust collection component 7 from flowing back into the turning air duct 4c and cleaning components (such as the nozzle) due to gravity or airflow backflow, thus avoiding secondary pollution and suction loss. When the wind deflector 5c is closed, it forms a temporary seal, reducing the leakage of residual airflow in the air duct. It can quickly build up negative pressure when the machine is turned on again, improving the response speed of the machine to suction immediately upon startup. At the same time, it prevents external impurities from entering the air duct through the air inlet 6b, ensuring the cleanliness of the sealing structure and components such as the steering air duct 4c.

[0092] In some embodiments, the host further includes: The rear shell 11 is detachably installed on the air duct shell 4 and the dust collection component 7.

[0093] The rear shell 11 can completely cover the connection area and exposed parts of the air duct shell 4 and the dust collection component 7, forming a closed protective barrier and isolating it from the outside world.

[0094] According to an embodiment of the present invention, another aspect provides a cleaning device, including the main unit.

[0095] Since the cleaning equipment includes the main unit of this utility model, it has the same technical effects as the main unit, which will not be described in detail here.

[0096] In some embodiments, the cleaning device is a vacuum cleaner.

[0097] The main unit of the vacuum cleaner adopts the air duct structure of this utility model. The first mounting cavity 4a, located in the air duct housing 4, is connected to the air inlet end of the turning air duct 4c. The cleaning component or the connecting pipe 1 of the cleaning component is connected to the turning air duct 4c in the first mounting cavity 4a. The dust and dirt collection component 7 is located in the second mounting cavity 4p. The arrangement of the dust and dirt collection component 7 does not obstruct the flow area of ​​the turning air duct 4c, and the airflow is smooth, which can ensure cleaning efficiency. The air inlet end of the turning air duct 4c only connects to other components in the first mounting cavity 4a. Since there are few connecting components, only one sealing structure is required to meet the sealing requirements, which reduces costs and effectively reduces the risk of air leakage, thereby improving the overall reliability of the vacuum cleaner.

[0098] like Figures 3 to 19As shown in the figure, this utility model provides a handheld vacuum cleaner, including a nozzle, a cleaning component, a main unit, and a connecting pipe 1 connecting the nozzle and the main unit. The nozzle is connected to the air duct housing 4 of the main unit via the connecting pipe 1. The main unit includes a power connector 2, a seal 3, a sealing gasket 5, a lower cover assembly 6, a dust collection assembly (dust cup), a sliding push button assembly 8, a control device 10 (PCB main board), a rear shell 11, and screws 9, etc. This vacuum cleaner is mainly used for cleaning floors, furniture surfaces, and crevices in home or commercial environments, and has the advantages of strong suction, convenient operation, and compact structure.

[0099] The air duct housing 4 is the core load-bearing component of the entire machine structure. Located at the front of the vacuum cleaner, it undertakes multiple functions, including airflow guidance, structural support, component integration, modular interface, air duct sealing, and connection to front-end functional components. Internally, it integrates the air duct structure (4c), sealing structure (4g and 4j), mounting cavities (4a, 4b, 4d, 4e, 4f, 4h and 4i), and push-button mounting structure (4l, 4m), making it an important component for achieving the integrated, modular, and efficient airflow management of the vacuum cleaner structure.

[0100] The duct housing 4 and the rear housing 11 are connected by screws 9 or snap-fit, together forming the main body of the vacuum cleaner housing. The front end of the duct housing 4 has multiple mounting cavities (4a, 4b, 4p, and 4q) for mounting the power connector 2, connecting pipe 1, cleaning components, and control devices 10, respectively. The mounting cavities contain structures such as a limiting buckle 4h, a limiting boss 4i, a button notch 4f, a guide rib 4d, and a guide groove 4e, for quick installation and secure connection. A sealing element 3 is installed into the sealing mounting groove 4g to improve sealing performance. The middle of the duct housing 4 integrates a steering duct 4c, which is pressed and connected to the air inlet 6b of the lower cover assembly 6 by a sealing gasket 5, forming a complete integrated air intake duct structure, allowing smooth airflow into the dust collection assembly. The upper end of the duct housing 4 has a push button mounting groove 4l and a sliding groove 4m for mounting a sliding push button assembly 8 to achieve gear shifting control. The lower end of the air duct housing 4 is connected to the lower cover assembly 6 via a sealing gasket 5, which is used to fix the dust collection assembly and seal the airflow path, effectively reducing wind resistance and improving dust collection efficiency.

[0101] The air duct housing 4 has direct or indirect assembly and functional coordination relationships with several key components in the vacuum cleaner, as detailed below: Duct housing 4 and rear housing 11: Duct housing 4 and rear housing 11 are fixed by screws 9 or snap-fit ​​structure, together forming the main housing of the vacuum cleaner, protecting the internal motor, duct and electronic control components; Duct housing 4 and dust collection assembly: The lower part of the duct housing 4 is provided with a turning duct 4c. The sealing ring rib 4j of the turning duct 4c is connected to the sealing boss 5a of the sealing gasket 5 by pressing the air inlet 6b of the lower cover assembly 6, forming a complete integrated air intake duct structure, and is connected to the dust collection assembly. The airflow is tangentially introduced through the air guide 5b of the sealing gasket 5 and the wind baffle 5c, forming a wall-adhering spiral cyclone in the dust collection assembly. Duct housing 4 and cleaning components or connecting pipe 1: The front end of the duct housing 4 is provided with a first mounting cavity 4a, which is used to connect the connecting pipe 1 or different types of cleaning accessories (such as floor brush, crevice brush, etc.) to realize the diversification of vacuum cleaner functions; Duct housing 4 and sealing structure: Duct housing 4 is provided with a sealing mounting groove 4g in the first mounting cavity 4a, and a sealing ring rib 4j is provided at the lower end of the turning duct 4c. The sealing ring rib 4j is connected to the sealing boss 5a of the sealing gasket 5 pressed by the air inlet 6b in the lower cover assembly 6, so as to ensure the sealing between the connecting pipe 1 and cleaning accessories, the lower cover assembly 6 and the dust collection assembly. Duct housing 4 and control components: The push button mounting groove 4l and sliding groove 4m at the upper end of the duct housing 4 are used to install the sliding push button assembly 8 to realize the user's control of the vacuum cleaner; specifically, it is controlled by the magnetic field strength between the magnet and the Hall effect device on the control board. It is a mechanical control method that adjusts the distance between the magnet and the Hall effect device by mechanically switching the sliding push button assembly 8 to adjust the distance between the magnet and the Hall effect device, and the resulting magnetic field change is converted into an electrical signal. Duct housing 4 and lower cover assembly 6: The lower end of duct housing 4 is connected to lower cover assembly 6 by screws 9 or quick-release structure to fix dust collection assembly, and a sealing gasket 5 is set at duct interface to ensure airflow sealing; Duct housing 4 and control device 10: The rear end of the duct housing 4 is provided with a support structure for the control device 10, namely a support column 4o, which is used to fix the control circuit board and realize the support and connection of electronic components such as motor, sensor, and control panel.

[0102] As can be seen, the air duct structure, as an important component of the vacuum cleaner's main unit structure, not only provides structural support but also integrates multiple functions such as air duct, sealing, control, and modular interfaces. It is a key component for improving the overall performance, assembly efficiency, and user experience of the vacuum cleaner. This utility model achieves multiple technical effects, including optimized airflow path, improved modular assembly performance, enhanced sealing performance, and improved user operation convenience, through optimizing the structural design of the air duct housing 4.

[0103] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by this application.

Claims

1. An air duct structure suitable for use in a cleaning apparatus, characterised in that, The air duct structure includes an air duct shell (4), and the air duct shell (4) contains: A steering air duct (4c) having an air inlet and an air outlet; The first mounting cavity (4a) is connected to the air inlet end of the steering air duct (4c); the first mounting cavity (4a) is used to connect with the cleaning component or the connecting pipe (1) of the cleaning component. The second mounting cavity (4p) is located on the side of the air duct housing (4) near the air outlet end of the steering air duct (4c); the dust and dirt collection component (7) connected to the air outlet end is located in the second mounting cavity (4p); the second mounting cavity (4p) is gas-isolated from the steering air duct (4c).

2. The air duct structure according to claim 1, wherein A sealing mounting groove (4g) is provided at the junction of the first mounting cavity (4a) and the steering air duct (4c), and a sealing element (3) is provided in the sealing mounting groove (4g).

3. The air duct structure according to claim 1, wherein The inner wall of the first mounting cavity (4a) is provided with a guide structure, the guide structure comprising: The guide groove (4e) extends axially along the first mounting cavity (4a).

4. The air duct structure according to claim 3, wherein The guiding structure also includes: The guide rib (4d) is located in the first mounting cavity (4a) near the outer side of the air duct housing (4).

5. The air duct structure according to claim 1, wherein The top side of the first mounting cavity (4a) is provided with a button notch (4f).

6. The air duct structure according to claim 1, wherein A sealing ring rib (4j) is provided at the connection between the second mounting cavity (4p) and the steering air duct (4c).

7. The air duct structure according to claim 1, wherein The air duct housing (4) is also provided with: The third mounting cavity (4b) is isolated on the adjacent side of the first mounting cavity (4a); the third mounting cavity (4b) is used to install the power connector (2).

8. The air duct structure according to claim 7, wherein The third mounting cavity (4b) is formed within the second mounting cavity (4p).

9. The air duct structure according to claim 7, wherein The end of the third mounting cavity (4b) is provided with a limiting boss (4i) to limit the displacement of the power connector (2) along the axial direction of the first mounting cavity (4a).

10. The air duct structure according to claim 9, wherein The third mounting cavity (4b) is also provided with a limiting buckle (4h), which is used to engage with the hook (2a) on the power connector (2) for limiting.

11. The air duct structure according to claim 1, wherein The air duct housing (4) is also provided with: The fourth mounting cavity (4q) is isolated on the side of the steering duct (4c) away from the first mounting cavity (4a) and the second mounting cavity (4p); the fourth mounting cavity (4q) is used to mount the control device (10).

12. The air duct structure according to claim 11, wherein A support column (4o) is provided in the fourth mounting cavity (4q), and the support column (4o) is used to support the control device (10).

13. The air duct structure according to claim 11, wherein The air duct housing (4) has a push-button mounting structure on the top surface corresponding to the fourth mounting cavity (4q) for mounting the sliding push-button assembly of the cleaning equipment.

14. The air duct structure according to claim 13, wherein The push button mounting structure includes: Push button mounting groove (4l), the air duct housing (4) is recessed in the direction of the fourth mounting cavity (4q) to form the push button mounting groove (4l); The sliding groove (4m) is located between the push button mounting groove (4l) and the top surface of the air duct housing (4).

15. The air duct structure according to any one of claims 1 to 14, characterized by, The air duct shell (4) is integrally formed.

16. A host, characterized by include: Dust and dirt collection components (7); According to any one of claims 1 to 15, the dust and dirt collection component (7) is installed on the side of the duct housing (4) near the second mounting cavity (4p).

17. The host of claim 16, wherein, The air duct structure also includes: The lower cover assembly (6) is detachably embedded in the second mounting cavity (4p); the lower cover assembly (6) includes a lower cover body and an air inlet (6b) protruding from the lower cover body; the dust collection component (7) is installed to the air duct housing (4) through the lower cover assembly (6).

18. The host of claim 17, wherein, The lower cover assembly (6) also includes: A sealing gasket (5) is disposed at the junction of the air inlet (6b) of the lower cover assembly (6) and the air outlet of the steering duct (4c).

19. The host computer according to claim 18, characterized in that, The sealing gasket (5) includes: The air guide section (5b) has a funnel-shaped air guide structure; A sealing boss (5a) is provided at the upper end of the air guide (5b) and is pressed together with the air inlet (6b) of the lower cover assembly (6); A wind deflector (5c) is openable and closable and located on the air guide (5b) near the sealing boss (5a).

20. The host of any one of claims 16 to 19, wherein, The host also includes: The rear shell (11) is detachably installed on the air duct housing (4) and the dust collection component (7).

21. A cleaning device, characterized in that, Includes the host computer as described in any one of claims 16 to 20.

22. The cleaning apparatus of claim 21, wherein, The cleaning equipment is a vacuum cleaner.

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