A vacuum cleaner

Abstract

This invention provides a vacuum cleaner, belonging to the field of vacuum cleaner technology. It solves the technical problem of existing vacuum cleaners where turbulent airflow easily forms, causing dust to not accumulate stably in the dust collection hopper, increasing the burden on the filter, and thus affecting the stability of the vacuum cleaner's suction power. This vacuum cleaner includes a main body and a dust collection hopper fixed to the lower end of the main body. The main body houses a suction fan and a filter device. The dust collection hopper has a suction port connected to a suction hose, and a dust guide pipe is connected to the upper end of the suction port. The air outlet of the dust guide pipe is higher than the upper opening of the suction port. This invention increases the height of the air outlet, allowing the dust collection hopper to store more dust. External air is drawn away by the suction fan more quickly, resulting in relatively stable airflow within the dust collection hopper, preventing turbulent airflow, reducing the burden on the filter device, avoiding filter clogging, and increasing the vacuum cleaner's lifespan and suction stability.

Description

Technical Field

[0001] This invention belongs to the field of vacuum cleaner technology, and specifically refers to a vacuum cleaner. Background Technology

[0002] Vacuum cleaners use an electric motor to drive blades to rotate at high speed, creating negative air pressure inside a sealed casing to suck up dust and debris. Currently, vacuum cleaners on the market mainly consist of three parts: dust collection, dust suction, and dust filtration. They generally include a series-wound commutator motor, a centrifugal fan, a dust filter (bag), and suction accessories.

[0003] The utility model application with application number "201921511422X" discloses a vacuum cleaner, including a vacuum cleaner body with a vacuum chamber and a vacuum port. The vacuum chamber is provided with a filter device for filtering dust. The vacuum cleaner body includes a vacuum upper cover, a vacuum lower cover and a dust collection hopper. The vacuum port is located on the dust collection hopper, and the lower end of the vacuum port is connected to a vacuum hose with adjustable curvature.

[0004] The dust collection hopper in the aforementioned vacuum cleaner is connected to the suction hose via the suction port. The air outlet of the suction port is located in the lower middle part of the dust collection hopper. When dust accumulates at the air outlet of the suction port, further dust will accumulate around the outlet, and some dust will fall into the suction port. The dust collection hopper has a limited capacity to store dust. At the same time, as the vacuum cleaner sucks in the dust, it will stir up the dust inside and around the suction port, causing the dust to detach from the bottom of the dust collection hopper and tumble with the airflow in the suction chamber. This increases the burden on the filter device, affects the vacuum cleaner's suction capacity, and in severe cases, can even cause the filter device to become clogged, affecting its lifespan and requiring frequent cleaning or replacement, thus impacting the vacuum cleaner's working efficiency. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a vacuum cleaner with more stable suction.

[0006] The objective of this invention can be achieved through the following technical solutions:

[0007] A vacuum cleaner includes a main body and a dust collection hopper connected to the lower end of the main body. The main body is equipped with a vacuum fan and a filter device. The dust collection hopper is provided with a suction port that communicates with a vacuum hose. The vacuum port is characterized in that a dust guide pipe is connected to the upper end of the suction port, and the air outlet of the dust guide pipe is higher than the upper opening of the suction port.

[0008] This vacuum cleaner incorporates a dust guide tube within the original dust collection hopper, offering the following technical advantages: 1. It increases the height of the air outlet after external air enters the vacuum cleaner during suction, allowing dust to accumulate higher in the dust collection hopper. This increases the hopper's dust storage capacity, reducing the frequency of emptying the hopper and increasing the vacuum cleaner's efficiency. 2. Building upon the above, it prevents the dust level in the dust collection hopper from easily exceeding the air outlet at the top of the suction port. This keeps the dust in the dust collection hopper below the air outlet, preventing dust around the suction port from being carried away by airflow and swirling in the upper part of the main body. This reduces the workload on the filtration system, avoids repeatedly filtering the same dust, and increases efficiency. The improved filtration and suction efficiency of this vacuum cleaner are achieved through several improvements. Firstly, the reduced workload on the filter device prevents it from clogging due to excessive dust filtration, thus extending its lifespan and reducing cleaning and maintenance frequency. Secondly, the increased outlet height brings it closer to the filter, allowing for faster suction of incoming air. This results in more stable airflow within the dust collection hopper, preventing turbulent airflow from carrying dust to the upper part of the main unit, reducing the filter's workload, preventing clogging, and ensuring more stable suction. It also eliminates the need for frequent disassembly for cleaning or replacement of the filter, further extending the vacuum cleaner's lifespan.

[0009] In one of the aforementioned vacuum cleaners, the air outlet of the dust guide tube faces upward, and the upper end of the dust guide tube extends from the dust collection hopper and into the main body.

[0010] The upward-facing outlet of the dust guide tube in this vacuum cleaner allows dust entering the vacuum cleaner to directly enter the upper middle part of the main body and directly contact the side wall of the filter device. This prevents the airflow from the dust guide tube from affecting the dust accumulated in the dust collection hopper, such as preventing the formation of turbulent airflow within the dust collection hopper. This allows the dust to settle stably at the bottom of the dust collection hopper, ensuring that vacuuming operations and dust accumulation do not interfere with each other. It also prevents excessive dust from being stirred up in the dust collection hopper, which could overload the filter device and cause clogging. This helps to increase the service life and stability of the vacuum cleaner during use.

[0011] In the aforementioned vacuum cleaner, the air outlet of the dust guide tube is located between the filter device and the side wall of the main body in a horizontal projection.

[0012] If the air outlet of this dust guide tube is located directly below or opposite the side wall of the filter, the airflow from the outlet will impact the side wall of the filter from bottom to top, causing the dust adhering to the side wall to detach. However, because the airflow is constantly blowing upwards from the outlet, the floating dust is difficult to fall off, and dust will continuously accumulate at the upper end of the filter, causing blockage and affecting the vacuum cleaner's suction performance, lifespan, and suction stability. Furthermore, if the air outlet of the suction port is placed directly between the filter and the main body without adding a dust guide tube, the airflow will diffuse in a frustum shape after leaving the suction port due to the significant distance between the outlet and the lower end of the filter. This will prevent dust near the suction port from falling off smoothly, instead blowing it to the other side of the filter to re-adhere before finally falling into the dust collection hopper. Simultaneously, some of the air blown onto the lower surface of the filter... The airflow can be obstructed by the lower cover of the filter and move downwards, creating a turbulent airflow that blows up the dust deposited in the dust collection hopper, affecting the vacuum cleaner's suction efficiency and potentially clogging the filter, thus shortening the vacuum cleaner's lifespan. However, by placing the dust guide tube's outlet between the filter and the side wall of the main body, the airflow from the dust guide tube directly hits the lower surface of the upper cover and flows downwards along the filter's side wall. During this downward flow, the air is absorbed by the filter. Simultaneously, the airflow exerts almost no upward force on the dust adhering to the filter's side wall; instead, it exerts a downward force on the dust after contacting the lower surface of the upper cover, making it easier for the dust to fall off. This prevents the filter from clogging and requires repeated suction, improving suction efficiency and increasing the vacuum cleaner's lifespan and suction stability.

[0013] In the aforementioned vacuum cleaner, a connecting tube is sealed and detachably fixed inside the suction port. The lower end of the connecting tube is detachably fixed to the suction hose, and the upper end of the connecting tube is detachably fixed to the dust guide tube.

[0014] Installing a connecting tube at the suction port makes connecting the suction hose and dust guide tube much easier. Because the suction hose is pulled in various directions during actual use, the connection between the suction hose and the connecting tube is prone to wear. With the connecting tube, it only needs to be replaced when it wears down to a certain extent, making installation and maintenance convenient. If the suction hose is directly connected to the suction port, since the suction port is directly formed into the dust collection hopper, when the suction port wears down to a certain extent, the entire dust collection hopper must be replaced to ensure good sealing during vacuum cleaner operation. This makes installation and maintenance more difficult, results in significant material waste, and increases replacement and maintenance costs. Furthermore, due to differences in actual usage environments or different usage needs, vacuum cleaners often require the replacement of suction hoses of different lengths or materials, leading to differences in the size or structure of the suction hose connectors. Using a connecting tube, as long as the connecting tube and the suction port are compatible, the lower end of the connecting tube can be adapted to the corresponding suction hose, facilitating replacement.

[0015] In the aforementioned vacuum cleaner, an outwardly protruding ring is formed in the middle of the outer side of the connecting tube, a sealing ring is fitted on the upper end of the connecting tube to seal the connection between the suction port and the connecting tube, an outwardly protruding locking block is provided on the outer side of the upper end of the connecting tube, an inwardly protruding limiting strip is formed on the inner wall of the suction port, and a guide groove that cooperates with the locking block is provided on the limiting strip.

[0016] When this vacuum cleaner is working, first insert the connecting tube into the suction port, and let the locking block on the connecting tube insert along the guide groove at the suction port. When the sealing ring is squeezed between the lower end face of the suction port and the upper end face of the outer protrusion, the locking block disengages and is located on the upper side of the limiting strip. Then rotate the connecting tube to make the locking block and the guide groove misaligned, thereby fixing the connecting tube to the suction port. The above fixing method is convenient and quick to connect, and the connection structure has good stability.

[0017] In the aforementioned vacuum cleaner, the thickness H of the limiting strip gradually increases from one side of the guide groove in a clockwise direction. The locking block includes a first locking part and a second locking part with a thickness greater than that of the first locking part. The first locking part can be locked and fixed with the limiting strip as the connecting tube rotates. The second locking part can be located on the upper side of the limiting strip as the connecting tube rotates and locks and fixes the limiting strip along the axial direction of the connecting tube.

[0018] The design of the limiting strip of this vacuum cleaner, which gradually increases in thickness in a clockwise direction, works in conjunction with the first locking part to make the connection between the connecting tube and the suction port more stable in the circumferential direction of the connecting tube. The design of the second locking part makes the connection between the connecting tube and the suction port more stable in the axial direction of the connecting tube. The combination of the two ensures that the suction port and the connecting tube have good connection stability and the connection is more secure. At the same time, the connection method is also relatively simple and convenient. Just align the locking block on the connecting tube with the guide groove of the suction port and insert it. After inserting it to the bottom, rotate it clockwise.

[0019] In the aforementioned vacuum cleaner, there are two guide grooves symmetrically arranged inside the suction port, and two limiting strips are respectively arranged between the two guide grooves. One end of the limiting strip is connected to the groove wall of the guide groove, and the other end of the limiting strip is connected to the groove wall of the other guide groove. Two limiting protrusions are provided on the suction port side wall on the upper side of each limiting strip, and a limiting groove for fixing the second locking part is formed between the two limiting protrusions.

[0020] During the process of fixing the connecting tube and the suction port by rotating the connecting tube, the first locking part gradually locks and fixes itself to the limiting strip as the connecting tube rotates. After rotating to a certain extent, the second locking part engages with the limiting groove formed by the limiting protrusion. This limiting groove design can further improve the stability of the connection between the connecting tube and the suction port. Since the suction hose will inevitably be pulled by the connecting tube during use, causing the connecting tube to shake, if the limiting groove is not provided, the connection between the connecting tube and the suction port may loosen as the connecting tube shakes, resulting in poor sealing and indirectly leading to poor suction performance. Therefore, the addition of the limiting groove design can improve the suction stability of this vacuum cleaner to a certain extent.

[0021] In the aforementioned vacuum cleaner, the inner side of the connecting tube is provided with an inner convex ring, the lower end of the connecting tube is snapped and fixed to the vacuum hose, the upper end of the connecting tube is inserted and fixed to the dust guide tube, and the vacuum hose and the dust guide tube abut against the lower end face and the upper end face of the inner convex ring, respectively.

[0022] The aforementioned inner convex ring design not only limits the position of the lower end of the dust guide tube and the upper end of the suction hose, preventing the dust guide tube from being inserted too deeply, which could cause the suction hose to fail to snap properly during installation or be squeezed out by the inserted dust guide tube after the suction hose is snapped in place, but also prevents the dust guide tube from being pushed upwards when installing the suction hose after the dust guide tube is inserted. This would create a large gap between the upper end of the suction hose and the dust guide tube, allowing airflow to pass through this gap and enter the gap between the dust guide tube and the connecting tube, thus affecting the airflow direction inside the vacuum cleaner. This would cause dust in the dust collection hopper to be blown up or dust floating in the lower cover to not fall off smoothly, affecting the vacuum cleaner's suction performance. With the addition of this inner convex ring, the lower end of the dust guide tube can abut against the upper end of the inner convex ring during installation, with a smaller gap, making it difficult for airflow to enter and improving suction stability. At the same time, the dust guide tube and suction hose will not interfere with each other during installation due to the obstruction of the inner convex ring, making installation more convenient and stable.

[0023] In the aforementioned vacuum cleaner, the main body includes an upper cover and a lower cover that is detachably fixed to the lower side of the upper cover. The vacuum cleaner fan is located inside the upper cover. The lower side of the upper cover is provided with an air inlet communicating with the air inlet of the vacuum cleaner fan and a lower convex ring connected to a filter device. The filter device includes an annular mounting part, a lower cover, a cylindrical metal bracket, and a wave-shaped filter cover covering the outside of the metal bracket. The metal bracket and the filter cover are both fixed between the annular mounting part and the lower cover. The annular mounting part can be fitted onto the lower convex ring and sealed to the lower convex ring.

[0024] The upper and lower covers of this vacuum cleaner are detachable and fixed for easy cleaning and maintenance; the lower convex ring and the annular mounting part help to increase the sealing of the connection between the filter device and the upper cover; the metal bracket design in the filter device can support the filter cover and prevent the vacuum fan from generating negative pressure that would cause the filter cover to deform and affect the suction effect; furthermore, the wavy filter cover can increase the filtration area of ​​the filter cover and improve the filtration effect.

[0025] In the aforementioned vacuum cleaner, a mounting bracket is fixed to the lower side of the upper cover, and the mounting bracket has multiple ventilation holes. The middle part of the mounting bracket is fixedly connected to the upper end of the mounting rod. The middle part of the lower cover has a mounting hole, and a sealing washer that mates with the mounting hole is provided on the lower side of the lower cover. The lower end of the mounting rod passes through the sealing washer and is threadedly connected to a mating nut. The nut can press and fix the sealing washer to the lower side of the lower cover.

[0026] The filter device is fixed by using a mounting bracket and mounting rod, while a sealing gasket and nut are used to achieve a sealed connection between the mounting rod and the lower cover, preventing dust-laden airflow from entering the filter device through the connection, thereby improving the stability of filtration.

[0027] In one of the aforementioned vacuum cleaners, the filter device is covered with a filter bag, which has openings at both ends and is equipped with tightening straps.

[0028] Without a filter bag, the wavy filter cover of the vacuum cleaner will cause dust to accumulate directly in the recesses, making it difficult for dust to fall off. Excessive dust buildup will clog the filter cover, affecting suction stability and requiring frequent cleaning to ensure normal and stable operation, significantly reducing suction efficiency. With a filter bag, the dust undergoes an initial filtration process, filtering out large debris and larger dust particles. Some smaller dust particles are also blocked, with only a small amount remaining. Small dust particles can pass through the filter bag and then be filtered by the filter cover, where they adhere to the filter cover. Because the surface of the filter bag is relatively smooth and without wavy folds, the dust adhering to the outer surface of the filter bag is easy to fall into the dust collection hopper under gravity after accumulating to a certain extent, and is not likely to cause blockage and affect the filtration effect of the vacuum cleaner. Although some small dust particles that adhere to the outer surface of the filter cover after being filtered by the filter bag cannot fall off, their quantity is small and will not affect the dust collection efficiency of the filter cover during a single working period. They only need to be cleaned once after each vacuuming session.

[0029] In the aforementioned vacuum cleaner, the lower end of the dust collection hopper is provided with a dust outlet, and a dust outlet cover is detachably fixed to the dust outlet.

[0030] The design of the dust outlet and dust cover makes it easy to remove the accumulated dust. During operation, simply rotate and remove the dust cover to discharge the accumulated dust from the dust outlet. The structure is simple and easy to operate.

[0031] In the aforementioned vacuum cleaner, the lower cover includes a detachable and fixed front cover and a rear cover. The rear cover is fixed with a wall-mounted bracket to facilitate hanging the main body. The lower end of the upper cover and the upper end of the dust collection hopper are both provided with sealing rings that cooperate with the two ends of the lower cover.

[0032] The aforementioned sealing rings are located on the upper cover and the dust collection hopper to facilitate cleaning of the vacuum cleaner without removing the rear cover from the wall-mounted position. Specifically, cleaning can be performed by first separating the upper cover and dust collection hopper from the lower cover, and then cleaning the filter and dust collection hopper. Furthermore, if it is necessary to clean the lower cover, the front cover and the rear cover can be separated, and then the front cover and the rear cover mounted on the wall can be cleaned separately. After cleaning, the front cover and the rear cover should be fixed together first, and then the upper cover and the dust collection hopper should be fixed together with the lower cover. The operation is convenient.

[0033] Compared with the prior art, the technical effects of the present invention are as follows:

[0034] This vacuum cleaner features an increased exhaust height, allowing the dust hopper to hold more dust, thus increasing its capacity and reducing the frequency of cleaning. Simultaneously, external air is drawn in more quickly by the vacuum fan, resulting in a more stable airflow around the dust hopper, preventing turbulent airflow and avoiding the re-stirring of dust that has fallen into the hopper. This reduces the workload on the filter during operation, preventing clogging and increasing the filter's lifespan and vacuuming stability. Attached Figure Description

[0035] Figure 1 This is a perspective view of the present invention.

[0036] Figure 2 This is an overall sectional view of the present invention.

[0037] Figure 3 This is a schematic diagram of the structure of the dust collection hopper of the present invention.

[0038] Figure 4 This is a cross-sectional view of the filtering device of the present invention.

[0039] Figure 5 yes Figure 4 Cross-sectional view after the explosion at point A in the middle.

[0040] Figure 6 This is a schematic diagram of the connection structure between the connecting tube and the dust suction port of the present invention.

[0041] Figure 7 This is a schematic diagram of the connecting tube of the present invention.

[0042] Figure 8 This is a schematic diagram of the dust suction port of the present invention.

[0043] In the diagram, 10. Main body; 1. Upper cover; 11. Dust collector fan; 12. Air inlet; 13. Lower protruding ring; 14. Mounting bracket; 141. Vent hole; 15. Mounting rod; 2. Lower cover; 21. Front cover; 22. Rear cover; 221. Wall mount; 3. Dust collection hopper; 31. Dust suction port; 311. Limiting strip; 312. Guide groove; 313. Limiting protrusion; 314. Limiting slot; 32. Dust guide pipe; 33. 331. Connecting pipe; 332. Outer convex ring; 333. Locking block; 334. First locking part; 335. Second locking part; 336. Inner convex ring; 37. Sealing ring; 38. Dust outlet; 39. Dust outlet cover; 40. Filter device; 41. Annular mounting part; 42. Lower cover; 421. Mounting hole; 43. Metal bracket; 44. Filter cover; 45. Sealing gasket; 46. Nut; 47. Filter bag; 48. Tightening strap; 5. Dust suction hose. Detailed Implementation

[0044] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0045] This vacuum cleaner includes a main body 10 and a dust collection hopper 3 that is detachably fixed to the lower end of the main body 10. The main body 10 is equipped with a vacuum fan 11 and a filter device 4. The dust collection hopper 3 is provided with a suction port 31 that is connected to a vacuum hose 5. The feature is that a dust guide pipe 32 is connected to the upper end of the suction port 31, and the air outlet of the dust guide pipe 32 is higher than the upper opening of the suction port 31. This vacuum cleaner incorporates a dust guide tube 32 within the original dust collection hopper 3, offering the following technical advantages: First, it increases the height of the air outlet after external air enters the vacuum cleaner during suction, allowing dust to accumulate higher in the dust collection hopper 3. This increases the dust storage capacity of the dust collection hopper 3, reducing the frequency of cleaning and increasing the vacuum cleaner's efficiency. Second, it prevents the dust level in the dust collection hopper 3 from easily exceeding the air outlet at the top of the suction port 31. This keeps the dust in the dust collection hopper 3 below the air outlet, preventing dust around the suction port 31 from being carried away by airflow and tumbling in the upper part of the main body 10. This reduces the workload of the filter device 4 and avoids repeatedly filtering the same dust. First, it increases the filtration effect and suction efficiency of the vacuum cleaner. Second, by reducing the workload of the filter device 4, it avoids clogging the filter device 4 due to filtering too much dust at the same time, which helps to increase the service life of the vacuum cleaner and reduce the frequency of cleaning and maintenance. Third, by increasing the height of the air outlet, the air outlet is closer to the filter device 4, and the outside air is sucked away by the vacuum fan 11 more quickly. The air flow in the dust collection hopper 3 is relatively stable, which avoids the chaotic airflow from carrying the dust that falls into the dust collection hopper 3 and causing it to float to the middle and upper part of the main body 10. This reduces the filtration load of the filter device 4 during operation, avoids the filter device 4 from being clogged, and makes the suction effect more stable. It also avoids the need for frequent disassembly of the vacuum cleaner to clean or replace the filter device 4, which helps to increase the service life of the vacuum cleaner.

[0046] like Figure 2As shown, the outlet of the dust guide pipe 32 faces upwards, and its upper end extends from the dust collection hopper 3 and into the main body 10. The outlet of the dust guide pipe 32 is located between the filter device 4 and the side wall of the main body 10 in a horizontal projection. The upward-facing outlet of the dust guide pipe 32 allows dust entering the vacuum cleaner to directly enter the upper middle part of the main body 10 and directly contact the side wall of the filter device 4. This prevents the airflow from the dust guide pipe 32 from affecting the dust accumulated in the dust collection hopper 3, such as preventing the formation of turbulent airflow within the dust collection hopper 3. This allows the dust to settle stably at the bottom of the dust collection hopper 3, ensuring that vacuuming operations and dust accumulation do not interfere with each other. It also prevents excessive dust from being stirred up at the dust collection hopper 3, thus avoiding overloading and clogging the filter device 4. This contributes to increasing the service life and stability of the vacuum cleaner during use. If the air outlet is located directly below or opposite the side wall of the filter device 4, the airflow from the outlet will impact the side wall of the filter device 4 from bottom to top, causing the dust adhering to the side wall of the filter device 4 to detach. Furthermore, because the airflow continuously blows upwards from the outlet, the floating dust is difficult to fall off, and dust will continuously accumulate at the upper part of the filter device 4, causing blockage and affecting the vacuum cleaner's suction effect and lifespan, reducing suction stability. Moreover, if the dust guide pipe 32 is not added, and the air outlet of the suction port 31 is directly located between the filter device 4 and the side wall of the main body 10, the air outlet and the filter device... There is a long distance between the lower ends of the filter 4. After the airflow leaves the suction port 31, it diffuses in a frustum shape. This causes the dust near the suction port 31 to not fall off smoothly. Instead, it is blown to the other side of the filter 4 and re-attaches before it can fall into the dust collection hopper 3. At the same time, some of the airflow blowing onto the lower surface of the filter 4 will also move to the side and downward due to the obstruction of the lower cover 42 of the filter 4, thus forming a turbulent airflow that blows up the dust deposited in the dust collection hopper 3 again, affecting the vacuum cleaner's suction efficiency. In severe cases, it can even cause the filter 4 to become clogged, affecting the service life of the vacuum cleaner. However, placing the air outlet of the dust guide pipe 32 on the filter device... Between the side walls of the filter 4 and the main body 10, the airflow from the outlet of the dust guide pipe 32 blows directly onto the lower end surface of the upper cover 1 and gradually flows downward along the side wall of the filter device 4. During the entire downward flow process, it is absorbed by the filter device 4. At the same time, during the entire process, it hardly exerts an upward force on the dust attached to the side wall of the filter device 4. Instead, after the airflow comes into contact with the lower end surface of the upper cover 1, it exerts a downward force on the dust attached to the side wall of the filter device 4, making it easier for the dust to fall off. This avoids the filter device 4 from being blocked and repeated dust collection, which helps to improve dust collection efficiency and increase the service life and dust collection stability of this vacuum cleaner.

[0047] like Figure 1 and Figure 2As shown, a connecting pipe 33 is sealed and detachably fixed inside the suction port 31. The lower end of the connecting pipe 33 is detachably fixed to the suction hose 5, and the upper end of the connecting pipe 33 is detachably fixed to the dust guide pipe 32. The connecting pipe 33 at the suction port 31 facilitates the connection between the suction hose 5 and the dust guide pipe 32. Since the suction hose 5 is pulled in various directions during actual use, the connection between the suction hose 5 and the connecting pipe 33 is prone to wear. With the addition of the connecting pipe 33, it can be replaced only after the connecting pipe 33 has worn to a certain extent, making installation, disassembly, and maintenance convenient. However, if the suction hose 5 were directly connected to the suction port 31, since the suction port 31 is directly formed on the dust collection hopper 3, the entire dust collection hopper 3 would have to be replaced after the suction port 31 has worn to a certain extent. This ensures good sealing during vacuum cleaner operation, but also makes installation, disassembly, and maintenance more difficult, resulting in significant material waste and higher replacement and maintenance costs. Furthermore, due to differences in actual usage environments or different usage needs, vacuum cleaners often require replacement with vacuum hoses 5 of different lengths or materials, leading to differences in the size or structure of the connecting joints of the vacuum hoses 5. In this case, if a connecting pipe 33 is used for connection, as long as the connecting pipe 33 and the vacuum port 31 are compatible, the structure of the lower end of the connecting pipe 33 can be adapted to the corresponding vacuum hose 5, facilitating replacement.

[0048] like Figure 6-8 As shown, an outwardly protruding ring 331 is formed on the middle of the outer side of the connecting pipe 33. A sealing ring 34 is fitted on the upper end of the connecting pipe 33 to seal the connection between the suction port 31 and the connecting pipe 33. An outwardly protruding locking block 332 is provided on the outer side of the upper end of the connecting pipe 33. An inwardly protruding limiting strip 311 is formed on the inner wall of the suction port 31. The limiting strip 311 is provided with a guide groove 312 that cooperates with the locking block 332. The thickness H of the limiting strip 311 gradually increases from one side of the guide groove 312 in a clockwise direction. The locking block 332 includes a first locking part 333 and a second locking part 334 with a thickness greater than that of the first locking part 333. The first locking part 333 can move with the connecting pipe 33. The second locking part 334 can rotate with the connecting pipe 33 and be located on the upper side of the limiting strip 311, locking the limiting strip 311 along the axial direction of the connecting pipe 33. There are two guide grooves 312 symmetrically arranged in the dust suction port 31. There are two limiting strips 311 respectively arranged between the two guide grooves 312. One end of the limiting strip 311 is connected to the groove wall of the guide groove 312, and the other end of the limiting strip 311 is connected to the groove wall of the other guide groove 312. Two limiting protrusions 313 are provided on the side wall of the dust suction port 31 on the upper side of each limiting strip 311. A limiting groove 314 is formed between the two limiting protrusions 313 to fix the second locking part 334.

[0049] When this vacuum cleaner is working, first insert the connecting tube 33 into the suction port 31, so that the locking block 332 on the connecting tube 33 is inserted along the guide groove 312 at the suction port 31. When the sealing ring 34 is pressed between the lower end face of the suction port 31 and the upper end face of the outer protrusion, the locking block 332 disengages and is located on the upper side of the limiting strip 311. Then, rotate the connecting tube 33 to disengage the locking block 332 from the guide groove 312, thereby fixing the connecting tube 33 to the suction port 31. The above fixing method is convenient and quick to connect, and the connection structure is stable. The design exhibits good qualitative properties; the gradually increasing thickness of the aforementioned limiting strip 311 in a clockwise direction, combined with the first locking part 333, ensures a more stable connection between the connecting pipe 33 and the suction port 31 in the circumferential direction of the connecting pipe 33; the design of the second locking part 334 further stabilizes the connection between the connecting pipe 33 and the suction port 31 in the axial direction of the connecting pipe 33. The combination of these two elements ensures good connection stability between the suction port 31 and the connecting pipe 33, resulting in a more robust connection. Furthermore, the connection method is relatively simple and convenient. Simply align and insert the locking block 332 on the connecting tube 33 with the guide groove 312 of the suction port 31, and then rotate it clockwise after inserting it to the bottom. Furthermore, during the process of rotating the connecting tube 33 to fix the connecting tube 33 and the suction port 31, the first locking part 333 gradually locks and fixes itself to the limiting strip 311 as the connecting tube 33 rotates. After rotating to a certain extent, the second locking part 334 engages in the limiting groove 314 formed by the limiting protrusion 313. The design of this limiting groove 314 further... Improve the stability of the connection between the connecting tube 33 and the suction port 31; since the suction hose 5 will inevitably be pulled by the connecting tube 33 during use, the connecting tube 33 will shake. If the limiting groove 314 is not set, the connection between the connecting tube 33 and the suction port 31 may loosen as the connecting tube 33 shakes, resulting in poor sealing and indirectly leading to poor suction effect. Therefore, the design of adding the limiting groove 314 can improve the suction stability of this vacuum cleaner to a certain extent.

[0050] like Figure 6As shown, the inner side of the connecting pipe 33 is provided with an inner convex ring 335. The lower end of the connecting pipe 33 is snapped and fixed to the vacuum hose 5, and the upper end of the connecting pipe 33 is inserted and fixed to the dust guide pipe 32. The vacuum hose 5 and the dust guide pipe 32 abut against the lower end face and the upper end face of the inner convex ring 335, respectively. The design of the inner convex ring 335 not only limits the position of the lower end of the dust guide pipe 32 and the upper end of the vacuum hose 5, preventing the dust guide pipe 32 from being inserted too deeply, which would cause the vacuum hose 5 to fail to snap properly during installation or the vacuum hose 5 to be squeezed out by the inserted vacuum guide pipe 32 after snapping, but also prevents the dust guide pipe 32 from being pushed up when installing the vacuum hose 5 after the dust guide pipe 32 is inserted, resulting in a large gap between the upper end of the vacuum hose 5 and the dust guide pipe 32. After the airflow passes through this gap, it enters the gap between the dust guide pipe 32 and the connecting pipe 33 and then enters the vacuum hose 5. Dust entering the vacuum cleaner affects the airflow direction inside, causing dust in the dust collection hopper 3 to be blown up or floating in the lower cover 2 and unable to fall off smoothly, thus affecting the vacuum cleaner's suction effect. However, with the addition of the inner convex ring 335, the lower end of the dust guide tube 32 can abut against the upper end of the inner convex ring 335 during installation, with a smaller gap, making it difficult for airflow to enter, which helps to increase suction stability. At the same time, the dust guide tube 32 and the vacuum hose 5 will not interfere with each other during installation due to the obstruction of the inner convex ring 335, making installation more convenient and stable.

[0051] like Figure 1 , Figure 2 and Figure 3 As shown, the main body 10 includes an upper cover 1 and a lower cover 2 detachably fixed to the lower side of the upper cover 1. A vacuum cleaner fan 11 is located inside the upper cover 1. The lower side of the upper cover 1 is provided with an air inlet 12 communicating with the air inlet of the vacuum cleaner fan 11 and a lower protruding ring 13 connected to the filter device 4. The filter device 4 includes an annular mounting part 41, a lower cover 42, a cylindrical metal bracket 43, and a wave-shaped filter cover 44 covering the outside of the metal bracket 43. The metal bracket 43 and the filter cover 44 are both fixed between the annular mounting part 41 and the lower cover 42. The annular mounting part 41 can be fitted onto the lower protruding ring 13 and is connected to the lower protruding ring 1. 3. Sealed connection; A mounting bracket 14 is fixed on the lower side of the upper cover 1. The mounting bracket 14 has multiple ventilation holes 141. The middle part of the mounting bracket 14 is fixed to the upper end of the mounting rod 15. The middle part of the lower cover 42 has a mounting hole 421. A sealing washer 45 that mates with the mounting hole 421 is provided on the lower side of the lower cover 42. The lower end of the mounting rod 15 passes through the sealing washer 45 and is threadedly connected to the mating nut 46. The nut 46 can press and fix the sealing washer 45 to the lower side of the lower cover 42. A filter bag 47 is provided on the outer sleeve of the filter device 4. The filter bag 47 has openings at both ends and is provided with tightening straps 471.

[0052] The upper cover 1 and lower cover 2 of this vacuum cleaner are detachable and fixed for easy cleaning and maintenance. The lower convex ring 13 cooperates with the annular mounting part 41 to increase the sealing of the connection between the filter device 4 and the upper cover 1. The design of the metal bracket 43 in the filter device 4 can support the filter cover 44, preventing the vacuum fan 11 from generating negative pressure that would cause the filter cover 44 to deform and affect the suction effect. Furthermore, the wavy filter cover 44 can increase the filtration area of ​​the filter cover 44 and improve the filtration effect. The filter device 4 is fixed by the mounting bracket 14 and the mounting rod 15, and the sealing connection between the mounting rod 15 and the lower cover 42 is achieved by the sealing washer 45 and the nut 46, preventing the airflow carrying dust from entering the filter device 4 from the connection point, thereby improving the stability of filtration. If this vacuum cleaner does not have a filter bag 47, because the filter cover 44 of the filter device 4 is wavy, dust will directly accumulate on the concave part of the filter cover 44 and will not easily fall off. Excessive dust accumulation will cause the filter cover 44 to become clogged, affecting the suction effect. The stability of suction requires frequent cleaning of the filter cover 44 to ensure the vacuum cleaner can work normally and stably, which greatly reduces the suction efficiency. With the addition of the filter bag 47, the dust is first filtered through the filter bag 47. Large-volume debris and larger dust particles are filtered by the filter bag 47, and some smaller dust particles are also blocked by the filter bag 47. Only a small amount of small dust particles can pass through the filter bag 47 and are then filtered by the filter cover 44 and adhere to the filter cover 44. Because the surface of the filter bag 47 is relatively smooth and has no wavy folds, the dust adhering to the outer surface of the filter bag 47 is easy to fall into the dust collection hopper 3 under the action of gravity after accumulating to a certain extent, and it is not easy to cause blockage and affect the filtration effect of the vacuum cleaner. Although some small dust particles that adhere to the outer surface of the filter cover 44 after being filtered by the filter bag 47 cannot fall off, their amount is small and will not affect the suction efficiency of the filter cover 44 in a single working time. It only needs to be cleaned once after each vacuuming.

[0053] Furthermore, the lower end of the dust collection hopper 3 is provided with a dust outlet 35, and a dust outlet cover 36 is detachably fixed to the dust outlet 35. The design of the dust outlet 35 and the dust outlet cover 36 makes it easy to remove the accumulated dust. During operation, simply rotate and remove the dust outlet cover 36, and the accumulated dust can be discharged from the dust outlet 35. The structure is simple and the operation is convenient.

[0054] like Figure 1As shown, the lower cover 2 includes a detachable and fixed front cover 21 and a rear cover 22. The rear cover 22 is fixed with a wall-mounted bracket 221 for suspending the main body 10. The lower end of the upper cover 1 and the upper end of the dust collection hopper 3 are provided with sealing rings 34 that cooperate with the two ends of the lower cover 2. The aforementioned sealing ring 34 is provided on the upper cover 1 and the dust collection hopper 3 to facilitate cleaning of the vacuum cleaner without removing the rear cover 22 from the wall-mounted state. Specifically, cleaning can be performed by first separating the upper cover 1 and the dust collection hopper 3 from the lower cover 2, and then cleaning the filter device 4 and the dust collection hopper 3. Furthermore, if it is necessary to clean the lower cover 2, the front cover 21 can be separated from the rear cover 22, and then the front cover 21 and the rear cover 22 mounted on the wall can be cleaned separately. After cleaning, the front cover 21 and the rear cover 22 are fixed together first, and then the upper cover 1 and the dust collection hopper 3 are fixed together with the lower cover 2 after being fixed together. The operation is convenient.

[0055] The above embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape, and principle of the present invention should be covered within the scope of protection defined by the claims of the present invention.

Claims

1. A vacuum cleaner, comprising a main body (10) and a dust collection hopper (3) connected to the lower end of the main body (10), wherein the main body (10) is provided with a vacuum fan (11) and a filter device (4), and the dust collection hopper (3) is provided with a suction port (31) communicating with a vacuum hose (5), characterized in that: The main body (10) includes an upper cover (1) and a lower cover (2) which is detachably fixed to the lower side of the upper cover (1). The vacuum cleaner (11) is located inside the upper cover (1). The lower side of the upper cover (1) is provided with an air inlet (12) that communicates with the air inlet of the vacuum cleaner (11). The upper end of the vacuum port (31) is connected to a dust guide pipe (32), and the air outlet of the dust guide pipe (32) is higher than the upper opening of the vacuum port (31). The air outlet of the dust guide pipe (32) faces upward, and the upper end of the dust guide pipe (32) extends out from the dust collection hopper (3) and into the main body (10).

2. A vacuum cleaner according to claim 1, characterized in that: The air outlet of the dust guide pipe (32) is located between the filter device (4) and the side wall of the main body (10).

3. A vacuum cleaner according to claim 1, characterized in that: The suction port (31) is sealed and detachably fixed with a connecting pipe (33). The lower end of the connecting pipe (33) is detachably fixed with the suction hose (5), and the upper end of the connecting pipe (33) is detachably fixed with the dust guide pipe (32). The middle part of the outer side of the connecting pipe (33) is formed with an outward protruding ring (331). The upper end of the connecting pipe (33) is fitted with a sealing ring (34) that seals the connection between the suction port (31) and the connecting pipe (33). The outer side of the upper end of the connecting pipe (33) is provided with an outward protruding locking block (332). The inner wall of the suction port (31) is formed with an inward protruding limiting strip (311). The limiting strip (311) is provided with a guide groove (312) that cooperates with the locking block (332).

4. A vacuum cleaner according to claim 3, characterized in that: The thickness H of the limiting strip (311) gradually increases clockwise from one side of the guide groove (312). The locking block (332) includes a first locking part (333) and a second locking part (334) with a thickness greater than that of the first locking part (333). The first locking part (333) can be locked and fixed with the limiting strip (311) as the connecting pipe (33) rotates. The second locking part (334) can be located on the upper side of the limiting strip (311) as the connecting pipe (33) rotates and locks and fixes the limiting strip (311) axially along the connecting pipe (33). The guide groove ( 312) There are two symmetrically arranged in the suction port (31). There are two limiting strips (311) respectively between the two guide grooves (312). One end of the limiting strip (311) is connected to the groove wall of the guide groove (312), and the other end of the limiting strip (311) is connected to the groove wall of the other guide groove (312). Two limiting protrusions (313) are provided on the side wall of the suction port (31) on the upper side of each limiting strip (311). A limiting groove (314) for fixing the second locking part (334) is formed between the two limiting protrusions (313).

5. A vacuum cleaner according to claim 3, characterized in that: The inner side of the connecting tube (33) is provided with an inner convex ring (335). The lower end of the connecting tube (33) is snapped and fixed to the vacuum hose (5). The upper end of the connecting tube (33) is inserted and fixed to the dust guide tube (32). The vacuum hose (5) and the dust guide tube (32) abut against the lower end face and the upper end face of the inner convex ring (335), respectively.

6. A vacuum cleaner according to any one of claims 1-5, characterized in that: The lower side of the upper cover (1) is also provided with a lower protruding ring (13) connected to the filter device (4). The filter device (4) includes an annular mounting part (41), a lower cover (42), a cylindrical metal support (43), and a wave-shaped filter cover (44) covering the outside of the metal support (43). The metal support (43) and the filter cover (44) are both fixed between the annular mounting part (41) and the lower cover (42). The annular mounting part (41) can be fitted onto the lower protruding ring (13) and sealed to the lower protruding ring (13).

7. A vacuum cleaner according to claim 6, characterized in that: The lower cover (2) includes a detachable and fixed front cover (21) and a rear cover (22). The rear cover (22) is fixed with a wall bracket (221) to facilitate hanging the main body (10). The lower end of the upper cover (1) and the upper end of the dust collection hopper (3) are provided with sealing rings (34) that cooperate with the two ends of the lower cover (2).

8. A vacuum cleaner according to claim 6, characterized in that: The lower side of the upper cover (1) is fixed with a mounting bracket (14), which has multiple ventilation holes (141). The middle part of the mounting bracket (14) is fixedly connected to the upper end of the mounting rod (15). The middle part of the lower cover (42) has a mounting hole (421). The lower side of the lower cover (42) has a sealing washer (45) that mates with the mounting hole (421). The lower end of the mounting rod (15) passes through the sealing washer (45) and is threadedly connected to the mating nut (46). The nut (46) can press and fix the sealing washer (45) to the lower side of the lower cover (42).

9. A vacuum cleaner according to claim 8, characterized in that: The filter device (4) is covered with a filter bag (47), which has openings at both ends and is provided with tightening straps (471); the dust collection hopper (3) has a dust outlet (35) at its lower end, and a dust outlet cover (36) is detachably fixed at the dust outlet (35).

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