Straight-tube cyclone suction centrifugal anti-clogging handheld vacuum cleaner

Abstract

This invention relates to the field of handheld vacuum cleaner technology, and discloses a straight-tube cyclone centrifugal anti-clogging handheld vacuum cleaner, comprising a dust collection and filtration section and a power control section. The dust collection and filtration section has a storage tank and a front cover for the storage tank, while the power control section has a main unit housing and an internal motor. The bottom of the storage tank is connected to the top of the main unit housing. A stainless steel filter screen, a filter element, a filter sponge, and a wind deflector are nested inside the storage tank. The wind deflector is fixed to the top surface of the stainless steel filter screen, and an annular space exists between the outer periphery of the filter assembly and the inner wall of the storage tank. During operation, the dust-laden airflow is guided by the wind deflector into the annular space, forming a high-speed cyclone. Centrifugal force is used to throw large dust particles towards the tank wall and cause them to settle, effectively preventing a large amount of impurities from adhering to the filter screen surface. This invention has a compact structure, significant anti-clogging effect, stable and long-lasting suction power, and good shock absorption, sealing, and easy assembly / disassembly performance.

Description

Technical Field

[0001] This invention relates to the field of handheld vacuum cleaner technology, specifically a straight-tube cyclone suction centrifugal force anti-clogging handheld vacuum cleaner. Background Technology

[0002] Handheld vacuum cleaners have become a frequently used cleaning tool in daily life. These devices are small and easy to operate with one hand. They are often used to clean desktops, vehicle interiors, or narrow crevices. With upgrades in power components, the motor speed of handheld devices has increased; internal components typically include a fan, dust collection chamber, and multiple layers of filters, relying on suction to create negative pressure to draw external dust into the machine.

[0003] Regarding the above-mentioned issues, traditional handheld vacuum cleaners mostly use a DC fan as the suction source. Dust-laden air enters the back of the machine through the front opening, and the airflow trajectory is often straight, blowing directly towards the filter at the rear. Various large particles of debris and fine dust move synchronously with the airflow; the filter relies on its dense mesh to physically intercept impurities. The purified air that passes through the filter then passes through the motor impeller and is finally discharged through the exhaust vent at the rear. The main body of the vacuum cleaner and the dust cup are usually fixed together by the deformation and compression of plastic clips or multiple threaded connections.

[0004] This type of airflow-direct-to-filter structure is prone to problems after a period of operation. Dust lacks a primary pre-separation process, allowing large amounts of impurities to directly adhere and quickly clog the filter pores. Aerodynamic resistance skyrockets; the vacuum cleaner's suction power subsequently drops drastically. The rigid assembly of the motor components also causes negative effects. The metal casing and plastic body are in hard contact. High-frequency mechanical vibrations are transmitted to the outside without any buffering, causing not only ear-piercing resonance noise from the casing but also making internal circuit components susceptible to damage from long-term vibration. Daily dustbin cleaning is also cumbersome. Traditional screw-on or hard-clamped connections are often tight and stiff; users need to use both hands to grip the ends tightly and twist them in opposite directions when emptying the dustbin, making it difficult to unlock and separate smoothly.

[0005] Therefore, the present invention provides a straight-tube cyclone suction centrifugal force anti-clogging handheld vacuum cleaner to overcome the shortcomings of the prior art. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a straight-tube cyclone suction centrifugal anti-clogging handheld vacuum cleaner, which solves the problems of easy clogging of the filter caused by direct airflow leading to a sudden decrease in suction power, strong vibration and noise caused by rigid motor assembly, and cumbersome and laborious disassembly and cleaning of the dust chamber in existing handheld vacuum cleaners.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A straight-tube cyclone suction centrifugal anti-clogging handheld vacuum cleaner includes a dust collection and filtration section and a power control section. The dust collection and filtration section has a storage tank and a front cover of the storage tank installed on the top of the storage tank. The power control section has a main unit housing and a front cover of the main unit housing installed on the top of the main unit housing. The bottom end of the storage tank is connected to the top end of the front cover of the main unit housing. A motor is installed inside the main unit housing. The storage tank is internally fitted with a stainless steel filter screen, a filter element, a filter sponge, and a windproof cover. The windproof cover is fixed to the top surface of the stainless steel filter screen. There is an annular space between the outer periphery of the combination of the windproof cover, the filter element, and the stainless steel filter screen and the inner wall of the storage tank.

[0008] Preferably, the main unit housing is composed of a main unit top cover, a main unit bottom cover, and a main unit rear cover assembled together, and an 18650 battery assembly located on the bottom side of the motor is also provided inside the main unit housing.

[0009] Preferably, the stainless steel filter mesh is sleeved on the outer cylindrical surface of the filter element, and the filter sponge is embedded in the internal central channel of the filter element.

[0010] Preferably, a control PCB motherboard is installed on the inner top side of the main unit cover by fixing motherboard screws. A switch button is embedded on the surface of the main unit cover facing the top. A light-transmitting sheet is embedded on the surface of the main unit cover and at the position where the switch button faces the bottom. An adhesive display film is provided between the light-transmitting sheet and the control PCB motherboard.

[0011] Preferably, the upper surface of the switch button is provided with a switch adhesive patch, the edge of which extends and adheres to the outer surface of the main unit cover; side adhesive patches are pasted on the outer surfaces of the splicing seams on both sides of the main unit cover and the main unit bottom cover.

[0012] Preferably, the outer cylindrical surface of the motor is covered with a motor anti-vibration silicone sleeve, the inner surface of the motor anti-vibration silicone sleeve abuts against the outer shell of the motor, and motor anti-vibration silicone pillars are embedded around the end of the motor and in the structural gaps.

[0013] Preferably, the storage tank opening button is embedded in the movable groove of the main unit housing, and a button spring abuts against the inside of the storage tank opening button. A knurled pin penetrates laterally through the hinge hole; a spring pin and a spring are installed in the locking hole of the main unit front cover.

[0014] Preferably, multiple front cover fixing screws pass through the front cover of the main unit and are screwed into the internal threaded posts at the top of the top of the top cover of the main unit and the bottom cover of the main unit; a front cover sealing ring is clamped at the bottom end face splice of the front cover of the main unit, and a storage tank silicone sealing ring is embedded between the bottom outer edge of the storage tank and the top of the front cover of the main unit; an adhesive sealing ring is laid inside the gap between the joint surface of the top cover of the main unit and the bottom cover of the main unit, and a rear cover sealing ring is clamped at the top end face splice of the rear cover of the main unit.

[0015] Preferably, an LED lighting module is embedded in the lower edge of the front cover of the main unit, and the LED lighting module is electrically connected to the control PCB motherboard.

[0016] Preferably, a lanyard pin is penetrated and fixed to the outer side wall of the bottom cover or the rear cover of the main unit.

[0017] This invention provides a straight-tube cyclone suction-type centrifugal force anti-clogging handheld vacuum cleaner. It has the following beneficial effects: 1. This invention constructs a centrifugal separation structure by combining a baffle cover and a stainless steel filter screen inside the storage tank. When dust-laden airflow enters the storage tank, the solid surface of the baffle cover forces the airflow to change its linear trajectory, creating a high-speed rotating air field in the annular space between the inner wall of the storage tank and the outer wall of the filter screen. Larger dust particles are thrown towards the tank wall and deposited under centrifugal force, preventing a large amount of impurities from directly adhering to the surface of the filter structure. This effectively reduces the probability of filter clogging and maintains stable negative pressure and suction during equipment operation.

[0018] 2. This invention improves the buffering performance of the internal power components by adding a motor anti-vibration silicone sleeve and anti-vibration silicone pillars to the outside of the motor. The inner surface of the anti-vibration silicone sleeve abuts against the motor housing, and the outer surface abuts against the inner wall of the main unit housing. Together with the anti-vibration silicone pillars, they fill the rigid assembly gap between the motor and the housing. When the vacuum cleaner is running or subjected to external mechanical impacts, the elastic deformation of the silicone material effectively absorbs and attenuates the high-frequency vibration energy transmitted from the motor to the housing. This reduces the overall operating noise of the machine and protects internal electronic components such as the control PCB motherboard from vibration damage.

[0019] 3. This invention achieves convenient disassembly of the dust collection compartment by incorporating a storage tank opening button, button spring, spring pin, and other mechanical transmission components at the connection between the main unit's front cover and the storage tank. When the user presses the opening button, the button deflects around the knurled pin and pushes the spring pin to slide inward against the spring force, thereby quickly releasing the physical lock of the main unit's front cover on the bottom of the storage tank. This purely mechanical linkage unlocking structure simplifies the user's disassembly and assembly steps, making the process of cleaning the internal filter and emptying impurities from the dust-collecting area more efficient and convenient. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the straight-tube cyclone dust-collecting centrifugal force anti-clogging handheld vacuum cleaner of the present invention; Figure 2 This is a front view of the straight-tube cyclone dust-collecting centrifugal force anti-clogging handheld vacuum cleaner of the present invention; Figure 3 This is a side view of the straight-tube cyclone dust-collecting centrifugal force anti-clogging handheld vacuum cleaner of the present invention; Figure 4 This is an exploded view of the straight-tube cyclone dust-collecting centrifugal force anti-clogging handheld vacuum cleaner of the present invention.

[0021] The components include: 1. Windshield cover; 2. Filter sponge; 3. Rear cover sealing ring; 4. Motor anti-vibration silicone pillar; 5. Switch button; 6. Switch adhesive patch; 7. Light-transmitting sheet; 8. Main unit top cover; 9. Control PCB motherboard; 10. Motherboard fixing screws; 11. Side adhesive patch; 12. Adhesive sealing ring; 13. Front cover sealing ring; 14. Filter element; 15. Storage tank opening button; 16. Button spring; 17. Stainless steel filter. 18. Core mesh; 19. Storage tank; 20. Spring pin; 21. Storage tank silicone sealing ring; 22. Storage tank front cover; 23. Spring; 24. Knurled pin; 25. Front cover fixing screw; 26. Main unit front cover; 27. LED lighting module; 28. Main unit bottom cover; 29. ​​18650 battery pack; 30. Motor anti-vibration silicone sleeve; 31. Motor; 32. Adhesive display film; 33. Hanging lanyard pin; 44. Main unit rear cover. Detailed Implementation

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] See attached document Figure 1 To be continued Figure 3 This invention provides a straight-tube cyclone suction-type centrifugal force anti-clogging handheld vacuum cleaner, which may include a dust collection and filter section at the top and a power control section at the bottom. The dust collection and filter section at the top and the power control section at the bottom are connected and assembled sequentially along the same central axis to form an integral straight-tube appearance structure.

[0024] The main external structure of the dust collection and filtration section at the top is a storage tank 18. The storage tank 18 is a hollow cylindrical structure. A front cover 21 is installed at the top opening of the storage tank 18. The front cover 21 covers and seals the top end face of the storage tank 18.

[0025] The main external structure of the power control section at the bottom is the main unit housing. The main unit housing is composed of a front cover 25, an upper cover 8, a bottom cover 27, and a rear cover 33. The upper cover 8 and the bottom cover 27 are arranged opposite each other and joined together to form the middle section of the cylindrical housing.

[0026] The front cover 25 of the main unit is installed at the top opening formed by the combination of the top cover 8 and the bottom cover 27 of the main unit. The rear cover 33 of the main unit is installed at the bottom opening formed by the combination of the top cover 8 and the bottom cover 27 of the main unit.

[0027] The bottom end of the storage tank 18 is connected to the top end of the front cover 25 of the main unit. The bottom edge of the storage tank 18 abuts against the top edge of the front cover 25 of the main unit. The outer surface of the storage tank 18 is flush with the outer surfaces of the top cover 8 and the bottom cover 27 of the main unit.

[0028] A switch button 5 is embedded on the surface of the main unit's top cover 8, facing the top. The switch button 5 is used to control the power-on and power-off states of the internal circuitry. A switch adhesive patch 6 is provided on the upper surface of the switch button 5. The switch adhesive patch 6 covers the top of the switch button 5, and its edges extend and adhere to the outer surface of the main unit's top cover 8.

[0029] A light-transmitting sheet 7 is provided on the surface of the main unit's top cover 8, located at the bottom side facing the switch button 5. The light-transmitting sheet 7 is embedded in a reserved opening on the surface of the main unit's top cover 8. The outer surface of the light-transmitting sheet 7 is flush with the outer surface of the main unit's top cover 8.

[0030] The light-transmitting sheet 7 is used to transmit internal light. The light transmitted by the light-transmitting sheet 7 includes the light from the battery percentage display and the light emitted by the dust filter clogging indicator. An adhesive display film 31 is located below the light-transmitting sheet 7.

[0031] A side adhesive patch 11 is provided on the side of the main unit housing. The side adhesive patch 11 is attached to the outer surface of the joint between the main unit top cover 8 and the main unit bottom cover 27. The side adhesive patch 11 extends longitudinally and covers the joint.

[0032] The thickness of the side wall of storage tank 18 is greater than or equal to 2mm. The switch button 5 and the light-transmitting sheet 7 are arranged in a straight line along the central longitudinal axis of the main unit housing. Multiple through-hole ventilation holes are provided on the end face of the main unit's rear cover 33.

[0033] See attached document Figure 4 The present invention provides a straight-tube cyclone suction-type centrifugal force anti-clogging handheld vacuum cleaner, which may include an internal core structure. The internal core structure is composed of multiple functional components spliced ​​and nested, and is assembled in the internal accommodating space formed by the main body housing and the storage tank 18.

[0034] The main unit casing forms the bottom skeletal support structure. The main unit casing includes a front cover 25, a top cover 8, a bottom cover 27, and a rear cover 33. The top cover 8 and the bottom cover 27 are joined together along their horizontal mating surfaces to form a hollow cylindrical structure with internal accommodating space.

[0035] The front cover 25 is located at the top opening of the assembled structure of the upper cover 8 and the bottom cover 27. The front cover fixing screws 24 pass through the pre-drilled mounting holes on the front cover 25 and are screwed into the internal threaded posts at the top of the upper cover 8 and the bottom cover 27, thus fixing the front cover 25 to the top of the upper cover 8 and the bottom cover 27. The rear cover 33 is located at the bottom opening of the assembled structure of the upper cover 8 and the bottom cover 27 for physical sealing.

[0036] The power transmission and power supply components are housed within the internal space formed by the assembly of the main unit's upper cover 8 and lower cover 27. The motor 30 is located within this internal space, near the rear cover 33. An 18650 battery pack 28 is located within this internal space, situated below the motor 30. The 18650 battery pack 28 is electrically connected to the motor 30 via internal wiring and provides power to the motor 30.

[0037] A motor anti-vibration silicone sleeve 29 is wrapped around the outer cylindrical surface of the motor 30. The inner surface of the motor anti-vibration silicone sleeve 29 directly abuts against the outer shell of the motor 30, and its outer surface abuts against the inner walls of the main unit's top cover 8 and bottom cover 27. Motor anti-vibration silicone pillars 4 are embedded around the ends of the motor 30 and in structural gaps. The motor anti-vibration silicone sleeve 29 and the motor anti-vibration silicone pillars 4 cooperate to fill the rigid contact gap between the motor 30 and the main unit housing.

[0038] A control PCB board 9 is housed within the internal space above the 18650 battery pack 28. The control PCB board 9 is securely mounted to a pre-reserved support pillar on the top side inside the main unit cover 8 using fixing screws 10. The circuit network of the control PCB board 9 is connected to both the 18650 battery pack 28 and the motor 30, and is used to control power delivery and operating status.

[0039] Microswitches and multiple LEDs are soldered onto the top side of the control PCB motherboard 9. The switch button 5 is embedded in a corresponding button hole on the surface of the main unit's top cover 8. The bottom contact of the switch button 5 is located directly above the microswitch on the control PCB motherboard 9. Pressing the switch button 5 causes a downward displacement, triggering the microswitch and thus executing the power-on and power-off control logic.

[0040] An adhesive backing patch 6 covers the top of the switch button 5 and adheres to the upper surface of the switch button 5, with its edges extending and fitting against the junction of the outer surface of the main unit cover 8. A light-transmitting sheet 7 is mounted on the surface of the main unit cover 8 facing the bottom of the switch button 5. The light-transmitting sheet 7 is located directly above the light-emitting diode components on the control PCB main board 9.

[0041] The adhesive display film 31 is attached to the lower surface of the light-transmitting film 7 or directly fixed to the top of the control PCB motherboard 9. The surface of the adhesive display film 31 has printed digital light leakage areas for indicating the battery percentage and indicator light leakage areas for indicating a clogged dust filter. Light emitted from the LED elements on the control PCB motherboard 9 passes through the light leakage areas of the adhesive display film 31 and is transmitted to the outside via the light-transmitting film 7. Side adhesive patches 11 are attached to the outside of the side seam formed by the splicing of the main unit's upper cover 8 and bottom cover 27.

[0042] The dust collection and filtration section at the top is equipped with a cyclone dust collection and filtration anti-clogging component. The storage tank 18 is cylindrical, with a front cover 21 installed at its top opening. Inside the storage tank 18, stainless steel filter mesh 17, filter element 14, filter sponge 2, and windproof cover 1 are nested sequentially from bottom to top along the central axis.

[0043] The filter element 14 is in a cylindrical folded shape. The filter sponge 2 is embedded in the central channel inside the filter element 14. The stainless steel filter mesh 17 is fitted onto the outer cylindrical surface of the filter element 14. The baffle 1 is fixed to the top surface of the assembly of the stainless steel filter mesh 17 and the filter element 14. The baffle 1, the filter element 14, and the stainless steel filter mesh 17 together form an annular physical space between the outer periphery of the assembly and the inner wall of the storage tank 18, allowing airflow and the settling of coarse particles.

[0044] A storage tank opening / closing function component is provided at the junction area between the front cover 25 of the main unit and the storage tank 18. The storage tank opening button 15 is embedded in the movable groove of the main unit housing. One end of the button spring 16 abuts against the inside of the storage tank opening button 15, and the other end abuts against the housing support surface. A knurled pin 23 passes laterally through the hinge hole of the storage tank opening button 15.

[0045] The spring pin 19 is installed in the locking hole of the front cover 25 of the main unit in cooperation with the spring 22. When the storage tank opening button 15 is operated, it rotates around the axis of the knurled pin 23, which can overcome the elastic force of the button spring 16 and push the spring pin 19 to produce a linear displacement, thereby releasing the physical locking state of the front cover 25 of the main unit to the bottom of the storage tank 18.

[0046] An LED lighting module 26 is embedded in the lower edge of the front cover 25 of the main unit. The LED lighting module 26 is electrically connected to the control PCB main board 9 via wires. A hanging lanyard pin 32 is fixed through the outer side wall of the bottom cover 27 or the rear cover 33 of the main unit.

[0047] To isolate internal and external airflow, airtight sealing components are installed at the internal seams of the equipment. A rear cover sealing ring 3 is clamped at the joint on the top surface of the main unit's rear cover 33. An adhesive-backed sealing ring 12 is laid inside the gap between the horizontal mating surfaces of the main unit's upper cover 8 and the main unit's bottom cover 27.

[0048] The bottom end of the front cover 25 of the main unit is fitted with a front cover sealing ring 13. A storage tank silicone sealing ring 20 is embedded between the bottom outer edge of the storage tank 18 and the top of the front cover 25 of the main unit. The rear cover sealing ring 3, the adhesive sealing ring 12, the front cover sealing ring 13, and the storage tank silicone sealing ring 20 are in an elastic deformation state, sealing the physical gaps between the various splicing structural components.

[0049] See attached document Figure 4 This invention provides a straight-tube cyclone suction-type centrifugal force anti-clogging handheld vacuum cleaner, which may include an integral mechanical assembly structure composed of multiple components and a continuous airflow passage defined by the assembly structure. The overall mechanical assembly sequence follows a spatial combination logic from the inside to the outside and from the bottom to the top.

[0050] During the assembly process inside the main unit housing, the motor anti-vibration silicone sleeve 29 is first wrapped around the outer cylindrical surface of the motor 30. The motor 30, equipped with the motor anti-vibration silicone sleeve 29, is placed in the semi-cylindrical receiving groove inside the main unit bottom cover 27. Motor anti-vibration silicone pillars 4 are inserted around the end of the motor 30 and into the structural gaps. Subsequently, the 18650 battery pack 28 is placed on the internal support structure of the main unit bottom cover 27 on the underside of the motor 30. The output wires of the 18650 battery pack 28 are physically connected to the power input terminal of the motor 30 to complete the circuit conduction.

[0051] The control PCB motherboard 9 is placed inside the top side of the main unit cover 8. Multiple fixing screws 10 pass through the mounting holes of the control PCB motherboard 9 and are screwed into the support pillars inside the main unit cover 8 for mechanical fastening. The switch button 5 is embedded in a pre-drilled opening on the top side of the main unit cover 8. An adhesive backing patch 6 covers the top of the switch button 5, with its edges extending and adhering to the outer surface of the main unit cover 8. A light-transmitting sheet 7 is embedded in a pre-drilled opening on the bottom side of the main unit cover 8 for the switch button 5. An adhesive display film 31 is adhered between the lower surface of the light-transmitting sheet 7 and the upper surface of the light-emitting element on the control PCB motherboard 9.

[0052] An adhesive sealing ring 12 is laid horizontally at the joint edge of the main unit's upper cover 8 and the main unit's bottom cover 27. The main unit's upper cover 8 is fastened onto the top of the main unit's bottom cover 27, so that their longitudinal edges align. Side adhesive patches 11 are attached to the seam of the outer sidewall formed by the joint of the main unit's upper cover 8 and the main unit's bottom cover 27. A rear cover sealing ring 3 is fitted onto the top surface of the main unit's rear cover 33. The main unit's rear cover 33, equipped with the rear cover sealing ring 3, is inserted into the bottom opening of the joint structure between the main unit's upper cover 8 and the main unit's bottom cover 27. A lanyard pin 32 penetrates and is fixed in a pre-drilled hole in the outer sidewall of the main unit's bottom cover 27 or the main unit's rear cover 33.

[0053] During the assembly of the top component, the LED lighting module 26 is embedded in the forward opening below the front cover 25 of the main unit and electrically connected to the control PCB main board 9 via wires. Spring 22 and spring pin 19 are sequentially inserted into the pre-drilled locking holes below the front cover 25 of the main unit. Button spring 16 is placed in the receiving groove below the front cover 25 of the main unit. Storage tank opening button 15 is placed outside the button spring 16. Knurled pin 23 passes laterally through the hinge holes of the storage tank opening button 15 and the front cover 25 of the main unit to secure the rotating shaft.

[0054] The front cover sealing ring 13 is placed in the annular groove formed by the top surfaces of the main unit's upper cover 8 and the main unit's bottom cover 27. The bottom surface of the main unit's front cover 25 is attached to the top surface of the front cover sealing ring 13. Multiple front cover fixing screws 24 pass through the main unit's front cover 25 along the central axis and are screwed into the internal threaded holes at the top surfaces of the main unit's upper cover 8 and the main unit's bottom cover 27 to complete the structural fastening.

[0055] In the assembly of the top dust collection and filtration section, the filter sponge 2 is filled into the central channel inside the filter element 14. The stainless steel filter mesh 17 is fitted onto the outer cylindrical surface of the filter element 14. The baffle 1 is fixedly installed on the top surface of the assembly of the stainless steel filter mesh 17 and the filter element 14. The above-mentioned filter assembly is pushed axially into the internal hollow cavity of the storage tank 18 and fixed to the tail support structure. The storage tank silicone sealing ring 20 is fitted onto the top receiving surface of the main unit front cover 25. The bottom opening of the storage tank 18 is fitted onto the top surface of the main unit front cover 25 and presses the storage tank silicone sealing ring 20. The storage tank front cover 21 is installed at the top air inlet of the storage tank 18.

[0056] After the above components are assembled, a complete airflow path isolated from the external environment is constructed between the physical entities inside the equipment. The initial input end of this airflow path is the air inlet of the front cover 21 of the storage tank. External air carrying dust and impurities enters the internal cavity of the storage tank 18 through the front cover 21. Due to the positional relationship between the components, the airflow forms the first physical flow channel between the inner wall of the storage tank 18 and the outer wall of the stainless steel filter screen 17.

[0057] The airflow entering the storage tank 18 is obstructed by the physical surface of the baffle cover 1 and guided by the surrounding space, changing its initial linear trajectory and entering the annular space surrounding the storage tank 18. The airflow then passes sequentially from the outside to the inside through the dense mesh of the stainless steel filter screen 17 and the folded filter material layer surrounding the filter element 14. After passing through these two layers, the airflow further passes through the filter sponge 2 in the internal central channel.

[0058] Airflow passing through the filter sponge 2 enters the internal main cavity formed by the splicing of the main unit's upper cover 8 and bottom cover 27 via the central exhaust opening of the front cover 25. Within the cavity, the airflow flows over the surfaces of the 18650 battery pack 28 and the control PCB motherboard 9, ultimately entering the central exhaust port of the motor 30. After passing through the internal structure of the motor 30, the airflow is exhausted from the exhaust end of the motor 30. Finally, the airflow penetrates the channel inside the rear cover sealing ring 3 and is discharged to the external environment of the equipment through multiple through exhaust holes on the end face of the rear cover 33. Throughout operation, the rear cover sealing ring 3, the back adhesive sealing ring 12, the front cover sealing ring 13, and the storage tank silicone sealing ring 20 are in a state of elastic deformation caused by mechanical compression, physically blocking the gas exchange path between the internal cavity splicing gap and the external environment, maintaining the working negative pressure conditions required for the operation of the motor 30.

[0059] Working Principle: The user applies a downward physical displacement to the switch button 5. The bottom contact of the switch button 5 simultaneously moves downward and contacts and closes with the microswitch soldered to the surface of the control PCB motherboard 9. This closing action activates the internal electrical control circuit, connecting the current supply path between the 18650 battery pack 28 and the motor 30, causing the motor 30 to start rotating. In the powered state, the voltage sampling circuit built into the control PCB motherboard 9 continuously reads the output voltage value of the 18650 battery pack 28. The logic unit of the control PCB motherboard 9 converts the acquired voltage value into the corresponding remaining battery percentage data and outputs a drive current to the LED element on the back. The LED element emits a light beam that penetrates vertically upwards through the light-leaking area of ​​the battery percentage number reserved on the surface of the adhesive display film 31, and further penetrates the light-transmitting sheet 7 to reach the external environment, presenting the battery value to the user. During the above operation, the switch back adhesive patch 6 and the side back adhesive patch 11 seal the assembly gap outside the host top cover 8 and the host bottom cover 27, and the fixing motherboard screw 10 maintains the physical position of the control PCB motherboard 9 inside the host top cover 8.

[0060] After the motor 30 starts, its internal impeller rotates at high speed, discharging the air in the internal cavity of the equipment towards the rear cover 33 of the main unit. This creates a negative pressure environment within the sealed top cavity formed by the storage tank 18 and the front cover 25 of the main unit. Dust-laden air from the external environment, driven by the pressure difference between the external atmospheric pressure and the internal negative pressure, enters the storage tank 18 through the air inlet of the front cover 21. The straight-flowing dust-laden airflow contacts the top physical surface of the baffle 1. Due to the physical obstruction of the baffle 1, the airflow is forced to change its straight-line trajectory, deflecting along the outer edge of the baffle 1 and entering the annular physical channel formed between the inner wall of the storage tank 18 and the outer wall of the stainless steel filter screen 17. After entering this annular channel, the airflow forms a spiral-shaped high-speed rotating air field.

[0061] In the spiral rotating air field, dust particles and solid impurities such as hair carried by the airflow undergo circular motion. Because the density and mass of solid impurities are greater than air, they generate a radially outward centrifugal force during this circular motion. This centrifugal force forces the larger solid impurities to detach from the central airflow ring, move outward, and impact the inner wall surface of the storage tank 18. The solid impurities, having lost some kinetic energy, slide along the inner wall of the storage tank 18 away from the front cover 21 under the combined action of gravity and the axial thrust of the airflow, eventually settling in the dust-collecting area inside the storage tank 18. This physical separation process prevents a large amount of particulate matter from directly adhering to the stainless steel filter mesh 17 and the outer surface of the inner filter element 14. The centrifugally separated airflow penetrates sequentially from the outside to the inside of the stainless steel filter mesh 17, the folded filter layer of the filter element 14, and the internal pores of the filter sponge 2, achieving a step-by-step physical interception of fine particulate matter. The purified airflow passes through the front cover 25 of the main unit and enters the main unit housing. After flowing through the motor 30, it is finally discharged into the external environment through the exhaust hole that penetrates the sealing ring 3 of the rear cover.

[0062] Throughout the vacuuming process, the current monitoring module inside the control PCB 9 continuously collects the operating current value flowing through the motor 30. As tiny impurities gradually accumulate on the surface of the filter element 14 or the stainless steel filter mesh 17, the physical resistance of airflow penetrating the filter structure increases. This increased aerodynamic resistance leads to a rise in the vacuum level inside the device, increasing the aerodynamic load on the motor 30, which in turn causes a physical change in the real-time operating current value of the motor 30. The logic unit of the control PCB 9 continuously compares the collected real-time operating current value with a preset clogging current threshold. When the real-time current value exceeds the preset threshold and the duration reaches the preset judgment period, the control PCB 9 outputs a trigger command. This command drives the LED corresponding to the clogging indicator area of ​​the vacuum filter element below the adhesive display film 31 to light up. A warning beam is emitted through the light-transmitting sheet 7, providing an optical signal indicating that the filter assembly needs cleaning.

[0063] During the dustbin cleaning process, the user applies a lateral pressing force to the storage tank opening button 15. This force overcomes the elastic reaction force generated by the button spring 16, forcing the storage tank opening button 15 to mechanically deflect at a certain angle around the knurled pin 23 as its rotation axis. The inner drive end of the deflected button 15 pushes against the spring pin 19, causing the spring pin 19 to slide inward horizontally. This inward sliding of the spring pin 19 overcomes the elastic tension of the spring 22, causing the outer locking end of the spring pin 19 to disengage from the physical latching groove at the bottom of the storage tank 18. At this time, the silicone sealing ring 20, the front cover sealing ring 13, and the back adhesive sealing ring 12 release the elastic deformation recovery force stored under previous pressure. Without physical locking, the storage tank 18 is disengaged from the main unit's front cover 25. The user can remove the storage tank 18 and pull out the nested windproof cover 1, stainless steel filter screen 17, filter element 14, and filter sponge 2 to empty impurities. Under mechanical vibration conditions generated during equipment use and component assembly / disassembly, the motor anti-vibration silicone sleeve 29 and motor anti-vibration silicone pillar 4 absorb and attenuate the vibration energy transmitted from the motor 30 to the housing through material elastic deformation. The front cover fixing screw 24 withstands the tensile torque caused by component opening and closing to maintain structural firmness. The LED lighting module 26 projects a beam of light to provide local illumination under the power supply of the control PCB motherboard 9. The lanyard pin 32 maintains the physical load-bearing connection of the equipment in a suspended state.

Claims

1. A straight-tube cyclone suction-type centrifugal force anti-clogging handheld vacuum cleaner, characterized in that, It includes a dust collection and filtration section and a power control section. The dust collection and filtration section has a storage tank (18) and a storage tank front cover (21) installed on the top of the storage tank (18). The power control section has a main unit housing and a main unit front cover (25) installed on the top of the main unit housing. The bottom end of the storage tank (18) is connected to the top end of the main unit front cover (25). A motor (30) is installed inside the main unit housing. The storage tank (18) is internally fitted with a stainless steel filter screen (17), a filter element (14), a filter sponge (2), and a windproof cover (1). The windproof cover (1) is fixed to the top surface of the stainless steel filter screen (17). There is an annular space between the outer periphery of the combination of the windproof cover (1), the filter element (14), and the stainless steel filter screen (17) and the inner wall of the storage tank (18).

2. The straight-tube cyclone suction-type centrifugal anti-clogging handheld vacuum cleaner according to claim 1, characterized in that, The main unit housing is composed of a main unit top cover (8), a main unit bottom cover (27) and a main unit rear cover (33) assembled together. The main unit housing is also equipped with an 18650 battery assembly (28) located on the bottom side of the motor (30).

3. The straight-tube cyclone suction-type centrifugal anti-clogging handheld vacuum cleaner according to claim 1, characterized in that, The stainless steel filter mesh (17) is sleeved on the outer cylindrical surface of the filter element (14), and the filter sponge (2) is embedded in the internal central channel of the filter element (14).

4. The straight-tube cyclone suction-type centrifugal anti-clogging handheld vacuum cleaner according to claim 2, characterized in that, The control PCB motherboard (9) is installed on the inner top side of the main unit cover (8) by fixing motherboard screws (10). A switch button (5) is embedded on the surface of the main unit cover (8) facing the top. A light-transmitting sheet (7) is embedded on the surface of the main unit cover (8) and at the position of the switch button (5) facing the bottom. An adhesive display film (31) is provided between the bottom of the light-transmitting sheet (7) and the control PCB motherboard (9).

5. The straight-tube cyclone dust-collecting centrifugal anti-clogging handheld vacuum cleaner according to claim 4, characterized in that, The upper surface of the switch button (5) is provided with a switch adhesive patch (6), the edge of which extends and adheres to the outer surface of the main unit cover (8); the outer surface of the splicing gap on both sides of the main unit cover (8) and the main unit bottom cover (27) is covered with a side adhesive patch (11).

6. The straight-tube cyclone suction-type centrifugal anti-clogging handheld vacuum cleaner according to claim 1, characterized in that, The outer cylindrical surface of the motor (30) is covered with a motor anti-vibration silicone sleeve (29), the inner surface of the motor anti-vibration silicone sleeve (29) abuts against the outer shell of the motor (30), and motor anti-vibration silicone pillars (4) are embedded around the end of the motor (30) and in the structural gaps.

7. The straight-tube cyclone suction-type centrifugal anti-clogging handheld vacuum cleaner according to claim 1, characterized in that, The main unit housing has a storage tank opening button (15) embedded in the movable groove. The storage tank opening button (15) is abutted by a button spring (16), and a knurled pin (23) is transversely penetrating the hinge hole. A spring pin (19) and a spring (22) are installed in the locking hole of the main unit front cover (25).

8. The straight-tube cyclone dust-collecting centrifugal anti-clogging handheld vacuum cleaner according to claim 2, characterized in that, Multiple front cover fixing screws (24) pass through the main unit front cover (25) and are screwed into the internal threaded post at the top of the main unit upper cover (8) and the main unit bottom cover (27); the front cover sealing ring (13) is clamped at the splicing point of the bottom end face of the main unit front cover (25), and a storage tank silicone sealing ring (20) is embedded between the bottom outer edge of the storage tank (18) and the top of the main unit front cover (25); an adhesive sealing ring (12) is laid inside the gap between the joint surface of the main unit upper cover (8) and the main unit bottom cover (27), and a rear cover sealing ring (3) is clamped at the splicing point of the top face of the main unit rear cover (33).

9. The straight-tube cyclone suction-type centrifugal anti-clogging handheld vacuum cleaner according to claim 4, characterized in that, An LED lighting module (26) is embedded in the lower edge of the front cover (25) of the host, and the LED lighting module (26) is electrically connected to the control PCB motherboard (9).

10. The straight-tube cyclone dust-collecting centrifugal anti-clogging handheld vacuum cleaner according to claim 2, characterized in that, A lanyard pin (32) is inserted and fixed to the outer side wall of the main unit bottom cover (27) or the main unit rear cover (33).

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