Hand-held dust collector capable of discharging air from bottom

Abstract

The invention discloses a handheld dust collector capable of discharging air from the bottom. The handheld dust collector comprises a dust collector base; the dust cup is laterally clamped on the dust collector base, the air inlet pipe is in butt joint with the dust cup, and a filtering assembly is arranged in the dust cup; the dust collector host is butted with the dust cup; the top of the shunting assembly is in butt joint with the dust collector main machine, the side face of the shunting assembly is in butt joint with the front handle inner cavity and the first air outlet, the bottom of the shunting assembly is in butt joint with the rear handle inner cavity, and the front handle inner cavity, the rear handle inner cavity and upper and lower openings of the dust collector base form an annular air duct; the battery pack is clamped and assembled at the bottom of the annular air duct through a locking piece, the top of the battery pack is provided with a battery pack air inlet in butt joint with the annular air duct and the inner cavity of the battery pack, and the bottom and / or the side face of the battery pack are / is provided with second air outlets. The problems that when a common dust collector is actually used, a user feels uncomfortable due to the influence of hot air exhausted from the main air outlet, the use experience of a product is poor, the heat dissipation of a battery pack is poor, and stable use is affected due to the fact that the battery pack is prone to loosing during use can be solved.

Description

Technical Field

[0001] The invention relates to the technical field of vacuum cleaners, in particular to a handheld vacuum cleaner with bottom air outlet. Background Art

[0002] When a handheld vacuum cleaner is in use, the dust-laden airflow enters through the dust collecting pipe and is filtered by the filter assembly in the dust cup. Finally, it is guided by the negative pressure motor and discharged from the main air outlet on the top, side or back of the vacuum cleaner main unit. In actual use, this design will make users feel uncomfortable due to the hot air discharged from the main air outlet, and the product experience is not good. In addition, the battery pack power supply components are arranged too concentratedly and compactly, resulting in poor heat dissipation and poor operating stability. The battery pack is mostly assembled with a locking part and a spring. This structure has the problem of loosening when the vacuum cleaner is in use, affecting its power supply. Summary of the invention

[0003] The purpose of the present invention is to solve the problems that when a common vacuum cleaner with a main air outlet arranged at the top is used, the user will feel uncomfortable due to the hot air discharged from the main air outlet, resulting in a poor product experience, the battery pack power supply components are arranged too concentratedly and compactly, resulting in poor heat dissipation and poor operating stability, and the battery pack is mostly assembled with a vacuum cleaner using a locking part and a spring. This structure may become loose when the vacuum cleaner is used, affecting its power supply. A handheld vacuum cleaner with bottom air outlet is provided.

[0004] In order to achieve the above object, the present invention adopts the following technical solution: a handheld vacuum cleaner with bottom air outlet, comprising:

[0005] A vacuum cleaner base, with an air inlet pipe arranged at the front end thereof;

[0006] A dust cup is laterally mounted on the vacuum cleaner base, the outlet of the air inlet pipe is connected to the side inlet of the dust cup, and a filter assembly is arranged in the dust cup;

[0007] A vacuum cleaner host, the front end of which is connected to the dust cup air outlet;

[0008] A flow splitter assembly, the top of which is connected to the motor air outlet on the bottom side of the vacuum cleaner main body, the side of which is connected to the front handle inner cavity of the vacuum cleaner base and communicated with the first air outlet on the side of the front handle inner cavity, and the bottom of which is connected to the rear handle inner cavity of the vacuum cleaner base, and the front handle inner cavity, the rear handle inner cavity and the upper and lower openings of the vacuum cleaner base form an annular air duct;

[0009] The battery pack is mounted at the bottom of the annular air duct by means of a locking member, a battery pack air inlet is arranged on the top thereof for docking with the annular air duct and the inner cavity of the battery pack, and a second air outlet is arranged on the bottom and / or side thereof.

[0010] As a further description of the above technical solution:

[0011] The L-shaped dust collecting chamber in the air inlet pipe is connected to the side inlet of the dust cup, and a tangential air inlet guide plate is arranged at the side inlet of the dust cup.

[0012] As a further description of the above technical solution:

[0013] The filter assembly includes a multi-cone filter assembly arranged in the inner cavity of the dust cup and a HEPA assembly connected to the air outlet end of the multi-cone filter assembly.

[0014] As a further description of the above technical solution:

[0015] The diversion component is embedded and assembled in the vacuum cleaner main unit, and includes a motor frame with a negative pressure motor arranged inside and a U-shaped guide frame extending downward from the outside of a first vent at the bottom of the motor frame, a second vent is arranged on the side of the U-shaped guide frame, and the second vent is connected to the inner cavity of the front handle.

[0016] As a further description of the above technical solution:

[0017] A third vent is arranged at the bottom of the U-shaped air guide frame, a positioning frame is arranged outside the third vent, the positioning frame is inserted into the top of the inner cavity of the rear handle, a positioning piece is arranged in the inner cavity of the rear handle, which abuts against the end surface of the positioning frame and is locked and positioned with bolts or pins, and a fourth vent is arranged at the bottom of the positioning piece, which is connected with the third vent and the inner cavity of the rear handle.

[0018] As a further description of the above technical solution:

[0019] The bottom of the vacuum cleaner base is equipped with a sealing plate, and the sealing plate is provided with a fifth vent that is connected to the air inlet of the battery pack.

[0020] As a further description of the above technical solution:

[0021] The power supply assembly in the battery pack includes a first circuit board docked with the battery pack inside the battery pack and a second circuit board docked with the first circuit board and positioned on the top surface of the sealing plate.

[0022] As a further description of the above technical solution:

[0023] A mounting groove is arranged on the rear side of the top of the battery pack. The locking member comprises a pressing block and a special-shaped clamping strip. The pressing block is rotatably connected to the hinge seat inside the mounting groove through a hinge shaft and a torsion spring on its side.

[0024] As a further description of the above technical solution:

[0025] Several of the special-shaped clips extend into the battery pack and are clamped upwardly on the battery pack air inlet and the fifth vent. A rough cushion layer is provided on the inner side of the outer end of the special-shaped clip and the contact surface with the battery pack air inlet and the fifth vent. A wedge-shaped guide surface is provided on the outer top of the outer end of the special-shaped clip, and the angle between the wedge-shaped guide surface and the outer side surface of the outer end of the special-shaped clip is 140°-180°.

[0026] In summary, due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0027] 1. Compared with the common design of arranging the main air outlet of the vacuum cleaner at the rear or side of the vacuum cleaner main body, the handheld vacuum cleaner of the present invention arranges the main air outlet at the bottom of the vacuum cleaner - the front handle of the vacuum cleaner base (the user can hold the rear handle to perform vacuum cleaning operations) and the bottom or side of the battery pack. This design can avoid the discomfort of the hot air discharged when the handheld vacuum cleaner is in use to the user, thereby improving the user experience of the vacuum cleaner. In addition, the design of multiple main air outlets formed by the annular air duct can also fully dissipate the heat of the battery pack and dry the vacuum cleaning surface.

[0028] 2. The heating modules in the battery pack are positioned separately. Some of the heating modules with low heat resistance are positioned in the vacuum cleaner base, and the heat is conducted and dissipated through the annular air duct. The heating modules with high heat resistance are positioned in the battery pack, and the heating modules with relatively high temperature inside the battery pack 6 are conducted and dissipated through the guide structure of the fifth vent, the battery pack air inlet, and the second air outlet. This design can ensure that each heating module fully dissipates heat, and the layout of the heating modules is reasonably designed based on the temperature distribution inside the vacuum cleaner and the heat resistance of the heating modules, ensuring low quality loss during use and a long service life.

[0029] 3. The special-shaped card strip is connected to the fifth vent and the air inlet of the battery pack, so that the locking structure of the vacuum cleaner and the battery pack is pre-tightened when the vacuum cleaner is in use. The main mechanism is that the airflow flowing through this place cooperates with the wedge-shaped guide surface at the end of the special-shaped card strip to laterally tighten the end of the special-shaped card strip, and cooperates with the rough cushion layer to prevent the locking parts and battery pack from loosening due to structural vibration when the vacuum cleaner is in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 The present invention is a schematic diagram of the structure of a handheld vacuum cleaner with bottom air outlet.

[0032] Figure 2 The present invention is a cross-sectional view of a handheld vacuum cleaner with bottom air outlet.

[0033] Figure 3 The present invention is a cross-sectional view of a flow diversion component in a handheld vacuum cleaner with bottom air outlet.

[0034] Figure 4 The present invention is an assembly cross-sectional view of a vacuum cleaner base and a battery pack in a handheld vacuum cleaner with bottom air outlet.

[0035] Figure 5 This is an exploded view of a handheld vacuum cleaner with bottom air outlet (dust cup hidden).

[0036] Figure 6 The figure is a schematic diagram of the structure of a locking member in a handheld vacuum cleaner with bottom air outlet.

[0037] Legend:

[0038] 1. Vacuum cleaner base; 10. First air outlet; 11. Front handle inner cavity; 12. Rear handle inner cavity; 13. Positioning piece; 131. Fourth vent; 14. Closing plate; 141. Fifth vent; 2. Air inlet duct; 21. L-shaped dust collecting cavity; 3. Dust cup; 31. Dust cup inner cavity; 32. Multi-cone filter assembly; 33. HEPA assembly; 4. Vacuum cleaner host; 5. Diversion assembly; 50. Negative pressure motor; 51. First vent; 52. Second vent; 53. Third vent; 6. Battery pack; 60. Second air outlet; 61. Battery pack air inlet; 62. First circuit board; 63. Second circuit board; 64. Mounting slot; 7. Locking piece; 71. Press block; 72. Articulated shaft; 73. Special-shaped card strip. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0043] In the description of the embodiments of the present invention, it should be noted that the terms "upper", "inner", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0044] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] Embodiment 1:

[0046] See also Figure 1-6 The present invention provides a technical solution: a handheld vacuum cleaner with bottom air outlet, comprising:

[0047] A vacuum cleaner base 1, with an air inlet pipe 2 disposed at the front end thereof;

[0048] The dust cup 3 is laterally mounted on the vacuum cleaner base 1, the outlet of the air inlet pipe 2 is connected to the side inlet of the dust cup 3, and a filter assembly is arranged in the dust cup 3;

[0049] A vacuum cleaner main unit 4, the front end of which is connected to the air outlet of the dust cup 3;

[0050] The flow dividing component 5 has a top connected to the motor air outlet on the bottom side of the vacuum cleaner main unit 4, a side connected to the front handle inner cavity 11 of the vacuum cleaner base 1 and communicated with the first air outlet 10 on the side of the front handle inner cavity 11, and a bottom connected to the rear handle inner cavity 12 of the vacuum cleaner base 1. The front handle inner cavity 11, the rear handle inner cavity 12 and the upper and lower openings of the vacuum cleaner base 1 form an annular air duct;

[0051] The battery pack 6 is mounted on the bottom of the annular air duct by means of a locking member 7, a battery pack air inlet 61 is arranged on the top thereof for docking with the annular air duct and the inner cavity of the battery pack 6, and a second air outlet 60 is arranged on the bottom and / or side thereof.

[0052] Compared with the common vacuum cleaner design in which the main air outlet is arranged at the rear and side of the vacuum cleaner main body, the handheld vacuum cleaner of the present invention arranges the main air outlet at the bottom of the vacuum cleaner - the front handle of the vacuum cleaner base (the user can hold the rear handle to perform vacuum cleaning operations) and the bottom or side of the battery pack. This design can avoid the discomfort of the hot air discharged when the handheld vacuum cleaner is in use to the user, thereby improving the user experience of the vacuum cleaner. In addition, the design of multiple main air outlets formed by the annular air duct can also fully dissipate the heat of the battery pack and dry the vacuumed and cleaned surface.

[0053] The L-shaped dust collecting chamber 21 in the air inlet pipe 2 is connected to the side inlet of the dust cup 3, and a tangential air inlet guide plate is arranged at the side inlet of the dust cup 3. This ensures that the air inlet of the dust cup 3 is stable and reduces the air flow velocity loss.

[0054] The filter assembly includes a multi-cone filter assembly 32 arranged in the dust cup cavity 31 and a HEPA assembly 33 connected to the air outlet end of the multi-cone filter assembly 32. The quality of the outlet air flow is ensured by the centrifugal separation of the multi-cone, its surface filter cover and the secondary filtration and dust retention of the HEPA.

[0055] The diversion assembly 5 is embedded and assembled in the vacuum cleaner main body 4, and includes a motor frame with a negative pressure motor 50 disposed therein and a U-shaped guide frame extending downward from the outside of a first vent 51 at the bottom of the motor frame, and a second vent 52 is disposed on the side of the U-shaped guide frame, and the second vent 52 is connected to the front handle inner cavity 11. With this design, the assembly strength of the vacuum cleaner base 1 and the vacuum cleaner main body 4 is improved, the overall size thereof is reduced, and the air outlet and diversion of the negative pressure motor 50 are ensured to be stable.

[0056] The bottom of the vacuum cleaner base 1 is equipped with a sealing plate 14, and the sealing plate 14 is provided with a fifth vent 141 connected to the battery pack air inlet 61 to ensure the structural strength of the hollow vacuum cleaner base 1 and the assembly strength between the hollow vacuum cleaner base 1 and the battery pack 6. Figure 5 As shown, the specific structure is as follows: the sealing plate 14 and the battery pack 6 are laterally plugged and docked through the clamping strips on the opposite surfaces, and then the two are positioned by the locking member 7.

[0057] The working principle of a handheld vacuum cleaner with bottom air outlet in this embodiment includes: Figure 2-4As shown, when in use, the dust-laden airflow sucked in by the L-shaped dust collecting chamber 21 is guided by the tangential air inlet guide plate to realize the tangential air inlet of the airflow at the dust cup inlet, and the dust-laden airflow is discharged from the dust cup 3 through the secondary filtration of the filter assembly, and is guided by the negative pressure motor 50 to be discharged from the first vent 51 to the U-shaped guide frame, and part of the clean airflow flows from the second vent 52 to the front handle inner cavity 11 and is discharged from the first air outlet 10; part of the airflow enters the rear handle inner cavity 12, and is heat-conducted and dissipated to the surface of the battery pack 6 by the annular air duct, and is finally discharged from the first air outlet 10, or enters the battery pack 6 from the fifth vent 141 and the battery pack air inlet 61 to heat-conduct and dissipate the power supply components therein, and the airflow is discharged from the second air outlet 60 of the vacuum cleaner, and the airflow discharged from the two air outlets can dry the wet clean surface to improve the use efficiency.

[0058] Embodiment 2:

[0059] On the basis of the above-mentioned embodiment 1, preferably, a third vent 53 is provided at the bottom of the U-shaped air guide frame, a positioning frame is provided outside the third vent 53, the positioning frame is plugged into the top of the rear handle inner cavity 12, a positioning member 13 is provided in the rear handle inner cavity 12 to abut against the end face of the positioning frame and to be locked and positioned by bolts or pins, and a fourth vent 131 is provided at the bottom of the positioning member 13 to dock with the third vent 53 and the rear handle inner cavity 12. In this way, the installation strength of the vacuum cleaner base 1, the vacuum cleaner host 4, and the diversion component 5 is improved, and the airflow in the battery pack 6 is ensured to be stable.

[0060] Embodiment three:

[0061] On the basis of the above-mentioned embodiment 1, preferably, the power supply assembly in the battery pack 6 includes a first circuit board 62 docked with the battery pack inside the battery pack 6 and a second circuit board 63 docked with the first circuit board 62 and positioned on the top surface of the sealing plate 14. This design can realize the separate positioning of the heating modules in the battery pack 6, with some of the heating modules with low heat resistance being positioned in the vacuum cleaner base 1, and heat conduction and heat dissipation thereof being performed through the annular air duct, and the heating modules with high heat resistance being positioned in the battery pack 6, and heat conduction and heat dissipation of the heating modules inside the battery pack 6 with relatively high temperature being performed through the guide structure of the fifth vent 141, the battery pack air inlet 61, and the second air outlet 60.

[0062] Embodiment 4:

[0063] On the basis of the above embodiment, preferably, a mounting groove 64 is provided on the top rear side of the battery pack 6, and the locking member 7 includes a pressing block 71 and a special-shaped clip 73, and the pressing block 71 is rotatably connected to the hinge seat inside the mounting groove 64 through a hinge shaft 72 on its side and a torsion spring.

[0064] Several of the special-shaped clips 73 extend into the battery pack 6 and are clamped upwardly on the battery pack air inlet 61 and the fifth vent 141. A rough cushion layer is provided on the inner side of the outer end of the special-shaped clip 73 and the contact surface with the battery pack air inlet 61 and the fifth vent 141. A wedge-shaped guide surface is provided on the outer top of the outer end of the special-shaped clip 73. The angle between the wedge-shaped guide surface and the outer side surface of the outer end of the special-shaped clip 73 is 140°-180°.

[0065] The working principle of a bottom-out handheld vacuum cleaner of the present embodiment includes: the above-mentioned design is mainly used for pre-tightening the locking structure between the vacuum cleaner and the battery pack 6 when the vacuum cleaner is in use, and the main mechanism is that the airflow flowing through the fifth vent 141 and the battery pack air inlet 61 cooperates with the wedge-shaped guide surface at the end of the special-shaped clip 73 to laterally tighten the end of the special-shaped clip 73, and cooperates with the rough pad layer to prevent the locking part 7 and the battery pack 6 from loosening due to structural vibration when the vacuum cleaner is in use.

[0066] In summary, due to the adoption of the above technical solution, the handheld vacuum cleaner with bottom air outlet in this embodiment has the following beneficial effects compared with the prior art:

[0067] 1. Compared with the common design of arranging the main air outlet of the vacuum cleaner at the rear or side of the vacuum cleaner main body, the handheld vacuum cleaner of the present invention arranges the main air outlet at the bottom of the vacuum cleaner - the front handle of the vacuum cleaner base (the user can hold the rear handle to perform vacuum cleaning operations) and the bottom or side of the battery pack. This design can avoid the discomfort of the hot air discharged when the handheld vacuum cleaner is in use to the user, thereby improving the user experience of the vacuum cleaner. In addition, the design of multiple main air outlets formed by the annular air duct can also fully dissipate the heat of the battery pack and dry the vacuum cleaning surface.

[0068] 2. The heating modules in the battery pack are positioned separately. Some of the heating modules with low heat resistance are positioned in the vacuum cleaner base, and the heat is conducted and dissipated through the annular air duct. The heating modules with high heat resistance are positioned in the battery pack, and the heating modules with relatively high temperature inside the battery pack 6 are conducted and dissipated through the guide structure of the fifth vent, the battery pack air inlet, and the second air outlet. This design can ensure that each heating module fully dissipates heat, and the layout of the heating modules is reasonably designed based on the temperature distribution inside the vacuum cleaner and the heat resistance of the heating modules, ensuring low quality loss during use and a long service life.

[0069] 3. The special-shaped card strip is connected to the fifth vent and the air inlet of the battery pack, so that the locking structure of the vacuum cleaner and the battery pack is pre-tightened when the vacuum cleaner is in use. The main mechanism is that the airflow flowing through this place cooperates with the wedge-shaped guide surface at the end of the special-shaped card strip to laterally tighten the end of the special-shaped card strip, and cooperates with the rough cushion layer to prevent the locking parts and battery pack from loosening due to structural vibration when the vacuum cleaner is in use.

[0070] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A handheld vacuum cleaner with bottom air outlet, characterized in that: include: A vacuum cleaner base, with an air inlet pipe arranged at the front end thereof; A dust cup is laterally mounted on the vacuum cleaner base, the outlet of the air inlet pipe is connected to the side inlet of the dust cup, and a filter assembly is arranged in the dust cup; A vacuum cleaner host, the front end of which is connected to the dust cup air outlet; A flow splitter assembly, the top of which is connected to the motor air outlet on the bottom side of the vacuum cleaner main body, the side of which is connected to the front handle inner cavity of the vacuum cleaner base and communicated with the first air outlet on the side of the front handle inner cavity, and the bottom of which is connected to the rear handle inner cavity of the vacuum cleaner base, and the front handle inner cavity, the rear handle inner cavity and the upper and lower openings of the vacuum cleaner base form an annular air duct; Battery Pack It is assembled at the bottom of the annular air duct by means of a locking piece, a battery pack air inlet is arranged on the top thereof to connect with the annular air duct and the inner cavity of the battery pack, and a second air outlet is arranged on the bottom and / or side thereof.

2. A handheld vacuum cleaner with bottom air outlet according to claim 1, characterized in that: The L-shaped dust collecting chamber in the air inlet pipe is connected to the side inlet of the dust cup, and a tangential air inlet guide plate is arranged at the side inlet of the dust cup.

3. A handheld vacuum cleaner with bottom air outlet according to claim 1, characterized in that: The filter assembly includes a multi-cone filter assembly arranged in the inner cavity of the dust cup and a HEPA assembly connected to the air outlet end of the multi-cone filter assembly.

4. A handheld vacuum cleaner with bottom air outlet according to claim 1, characterized in that: The diversion component is embedded and assembled in the vacuum cleaner main unit, and includes a motor frame with a negative pressure motor arranged inside and a U-shaped guide frame extending downward from the outside of a first vent at the bottom of the motor frame, a second vent is arranged on the side of the U-shaped guide frame, and the second vent is connected to the inner cavity of the front handle.

5. A handheld vacuum cleaner with bottom air outlet according to claim 4, characterized in that: A third vent is arranged at the bottom of the U-shaped air guide frame, a positioning frame is arranged outside the third vent, the positioning frame is inserted into the top of the inner cavity of the rear handle, a positioning piece is arranged in the inner cavity of the rear handle, which abuts against the end surface of the positioning frame and is locked and positioned with bolts or pins, and a fourth vent is arranged at the bottom of the positioning piece, which is connected with the third vent and the inner cavity of the rear handle.

6. A handheld vacuum cleaner with bottom air outlet according to claim 1, characterized in that: The bottom of the vacuum cleaner base is equipped with a sealing plate, and the sealing plate is provided with a fifth vent that is connected to the air inlet of the battery pack.

7. A handheld vacuum cleaner with bottom air outlet according to claim 6, characterized in that: The power supply assembly in the battery pack includes a first circuit board docked with the battery pack inside the battery pack and a second circuit board docked with the first circuit board and positioned on the top surface of the sealing plate.

8. The handheld vacuum cleaner with bottom air outlet according to claim 6, characterized in that: A mounting groove is arranged on the rear side of the top of the battery pack. The locking member comprises a pressing block and a special-shaped clamping strip. The pressing block is rotatably connected to the hinge seat inside the mounting groove through a hinge shaft and a torsion spring on its side.

9. A handheld vacuum cleaner with bottom air outlet according to claim 8, characterized in that: Several of the special-shaped clips extend into the battery pack and are clamped upwardly on the battery pack air inlet and the fifth vent. A rough cushion layer is provided on the inner side of the outer end of the special-shaped clip and the contact surface with the battery pack air inlet and the fifth vent. A wedge-shaped guide surface is provided on the outer top of the outer end of the special-shaped clip, and the angle between the wedge-shaped guide surface and the outer side surface of the outer end of the special-shaped clip is 140°-180°.

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