Handheld wet and dry dust collector

Abstract

The utility model discloses a handheld wet and dry dual-purpose dust collector, which belongs to the technical field of electric tools and comprises a main machine, a dust cup and a filter component, the main machine comprises a casing and an airflow generating component, the airflow generating component comprises fan blades and a motor, a dirt inlet channel is arranged on the dust cup, and the filter component is detachably mounted in the dust cup. An air inlet cavity, an air outlet cavity and a containing cavity which are mutually independent are formed in the main machine, the machine shell is provided with an air inlet hole communicated with the air inlet cavity and an air outlet hole communicated with the air outlet cavity, the motor is arranged in the containing cavity, and airflow flowing into the air inlet cavity from the air inlet hole flows to the air outlet cavity and is discharged out of the main machine through the air outlet hole. Due to the fact that the air outlet cavity and the containing cavity are independent of each other, airflow carrying water vapor is directly discharged out of the main machine through the air outlet cavity and the air outlet holes, namely the airflow carrying the water vapor does not make contact with the motor and does not flow to other spaces in the main machine through gaps, electrical elements including the motor can be protected conveniently, the waterproof grade of the dust collector can reach IPX4, and the service life of the dust collector is prolonged. The waterproof capability of the dust collector is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electric tool technical field especially relates to a hand -held dry and wet dual -purpose dust collector. BACKGROUND

[0002] With the development of science and technology and the improvement of living standards, various electric appliances have entered people's life and brought great convenience, and the dust collector as a common electric appliance is mainly used for collecting dust, chippings and other dirt. The existing hand -held dust collector generally includes host computer and dust cup, the host computer is provided with motor and fan blade, the dust cup is provided with filter element for separating dirt and airflow, the motor drives the fan blade to rotate at high speed to produce negative pressure in the dust cup, the external gas flows into the dust cup to form airflow under the action of air pressure difference, the dirt flows into the dust cup along with the airflow, and the filter element separates the dirt and airflow, and the separated airflow is discharged after flowing through the host computer. In the structure of the existing dust collector, the air outlet direction of the fan blade is arranged towards the motor, and the airflow flowing through the fan blade will contact the motor before being discharged from the host computer. When the dust collector is used for collecting dirty liquid, the airflow flowing through the filter element will still carry a large amount of water vapor, which will flow into the host computer along with the airflow and contact the motor before being discharged from the host computer. Since the water vapor may condense to form water droplets during the flowing process, the motor is at risk of being damaged by water, which is not conducive to ensuring the performance stability of the motor and the performance stability of other electrical elements inside the host computer. SUMMARY

[0003] In order to solve the above-mentioned shortcomings and deficiencies in the prior art, the utility model provides a hand -held dry and wet dual -purpose dust collector, the air outlet cavity and the containing cavity are independent of each other, the airflow carrying water vapor directly discharges from the host computer through the air outlet cavity and the air outlet hole, that is, the airflow carrying water vapor will not contact the electrical elements including the motor, which can avoid the situation that the water vapor condensation causes the electrical elements to be damaged by water, and improve the waterproof level of the dust collector.

[0004] In order to realize the above technical purpose, the utility model provides a hand -held dry and wet dual -purpose dust collector, including:

[0005] The host computer includes a shell and an airflow generating assembly arranged in the shell, and the airflow generating assembly includes a fan blade and a motor for driving the fan blade;

[0006] The dust cup is detachably attached to the front end of the host computer, and the dust cup is provided with a dirty inlet channel;

[0007] The filter assembly is detachably installed in the dust cup;

[0008] The motor drives the fan blade to rotate to form an airflow flowing into the dust cup from the dirty inlet channel and flowing to the host computer after flowing through the filter assembly;

[0009] The host is provided with independent air inlet cavity, air outlet cavity and containing cavity, the casing is provided with air inlet hole connected with the air inlet cavity and air outlet hole connected with the air outlet cavity, and the motor is arranged in the containing cavity.

[0010] Preferably, the airflow generating assembly further comprises a wind guide cover arranged in the casing, the wind guide cover is provided with wind guide cavity, wind guide inlet and wind guide outlet, the wind guide cavity is located downstream of the air inlet cavity and upstream of the air outlet cavity, the fan blade is arranged in the wind guide cavity, the wind guide inlet is connected with the air inlet cavity and the wind guide cavity, and the wind guide outlet is connected with the wind guide cavity and the air outlet cavity.

[0011] Preferably, the air inlet cavity is located at the front side of the wind guide cover, and the wind guide inlet is arranged at the front side of the wind guide cover; and / or, the air outlet cavity is located at the outer periphery of the wind guide cover, and the wind guide outlet is arranged on the annular peripheral wall of the wind guide cover and spaced apart.

[0012] Preferably, at least part of the air outlet cavity is located at the outer periphery of the air inlet cavity, and a first separation structure is arranged between the wind guide cover and the casing for separating the air inlet cavity and the air outlet cavity; and / or, a second separation structure is arranged between the wind guide cover and the casing for separating the air outlet cavity and the containing cavity.

[0013] Preferably, the inner wall of the casing is provided with a sound insulation member covering the air outlet hole; and / or, the casing is provided with a concave recess corresponding to the containing cavity, and the bottom wall of the recess is provided with a ventilation hole connected with the containing cavity.

[0014] Preferably, the casing is provided with a first drain hole connected with the air outlet cavity; and / or, the casing is provided with a second drain hole connected with the containing cavity.

[0015] Preferably, the filter assembly comprises a filter and a bracket, the bracket is provided with a filter cavity with a rear end opening, the filter is detachably installed in the filter cavity, the side wall of the bracket is provided with a filter screen and a water baffle cover located outside the filter screen, and the water baffle cover covers at least the rear end of the filter screen to prevent liquid in the dust cup from flowing into the filter cavity through the filter screen when the dust cup is upward.

[0016] Preferably, a ventilation opening is formed between the front end of the water baffle cover and the filter screen; and / or, the rear end of the bracket is provided with a sealing member, and the sealing member is located at the outer periphery of the filter cavity and is used to prevent the liquid in the dust cup from flowing to the host.

[0017] Preferably, part of the front end of the bracket is recessed backward to form a guide cavity, and the axial projection of the rear end of the dirt inlet channel is located in the guide cavity; and / or, a baffle is arranged in the dust cup for opening and closing the dirt inlet channel, the baffle is arranged to be flipped, and the filter screen is arranged on the side away from the baffle opening the dirt inlet channel.

[0018] Preferably, the handheld dry-wet vacuum cleaner further comprises a battery module, the casing is provided with an attachment portion for mounting the battery module, the attachment portion is formed with an attachment cavity for accommodating the battery module, and at least a part of the battery module is covered by the attachment portion when mounted in the attachment cavity.

[0019] After the above technical scheme is adopted, the utility model has the following advantages:

[0020] 1. The handheld dry-wet vacuum cleaner has a main machine, an air inlet cavity, an air outlet cavity and a containing cavity which are independent of each other, an air inlet hole and an air outlet hole are arranged on the casing, and a motor is arranged in the containing cavity. When the vacuum cleaner is working, the motor drives the fan blade to rotate at a high speed to generate negative pressure in the dust cup. The external air flows into the dust cup through the dirt inlet channel to form an air flow, and the dirt flows into the dust cup along with the air flow. The air flow passes through the filter assembly and then flows into the air inlet cavity through the air inlet hole. The air flow in the air inlet cavity flows to the air outlet cavity and is discharged from the main machine through the air outlet hole. When the vacuum cleaner is used to collect dirty liquid, the air flow carrying water vapor passes through the air outlet cavity and the air outlet hole and is directly discharged from the main machine. The air flow carrying water vapor does not flow through the containing cavity, so that the air flow carrying water vapor does not contact the motor, thereby avoiding the situation that water droplets formed by condensation of water vapor adhere to the motor and cause the motor to be damaged by water. The performance stability of the motor can be ensured. In addition, since the air outlet cavity is arranged relatively independently, the air flow carrying water vapor does not flow through the gap to other spaces in the main machine, thereby protecting the electrical elements including the motor, the waterproof level of the vacuum cleaner can reach IPX4, the waterproof performance of the vacuum cleaner is improved, and the vacuum cleaner meets the use requirements of dry and wet use.

[0021] 2. The air flow generating assembly is provided with a wind guide cover having a wind guide cavity. The wind guide cavity is located downstream of the air inlet cavity and upstream of the air outlet cavity, and the fan blade is located in the wind guide cavity. On the one hand, the wind guide cover optimizes the air path structure of the air flow generating assembly, increases the negative pressure when the fan blade rotates, and improves the strength of the air flow. On the other hand, the wind guide cover has a protective effect on the fan blade to a certain extent.

[0022] 3. The air inlet cavity is located on the front side of the wind guide cover, and the air inlet is arranged on the front side of the wind guide cover, i.e. the air inlet is directly arranged to face the air inlet cavity. The distance between the air inlet cavity and the wind guide cavity can be reasonably shortened, so that the air flow flowing through the air inlet cavity can directly flow into the wind guide cavity through the air inlet.

[0023] The air outlet cavity is located at the outer periphery of the air guide cover, and the air guide outlets are arranged on the annular peripheral wall of the air guide cover and are spaced apart, and the air guide outlets are directly arranged to face the air outlet cavity, so that the distance between the air guide cavity and the air outlet cavity can be reasonably shortened, and the airflow flowing through the air guide cavity can be discharged from the main machine through the air guide outlets, the air outlet cavity and the air outlet hole as soon as possible. Since the air guide outlets are spaced apart, the airflow between the air guide cavity and the air outlet cavity can be ensured, so that the airflow flowing through the air guide cavity can be discharged from the main machine through the air guide outlets, the air outlet cavity and the air outlet hole in time, which is beneficial to improve the strength of the airflow, thereby improving the strength of the dust suction.

[0024] 4、The air outlet cavity is at least partially located at the outer periphery of the air inlet cavity, and the first separation structure is arranged between the air guide cover and the shell, so that the air inlet cavity and the air outlet cavity are independent of each other, and the air leakage between the air inlet cavity and the air outlet cavity is avoided, so that the strength of the airflow can be ensured.

[0025] The second separation structure is arranged between the air guide cover and the shell, so that the air outlet cavity and the containing cavity are independent of each other, and the airflow carrying water vapor flowing into the containing cavity to damage the motor is avoided.

[0026] 5、The inner wall of the shell is provided with a sound-absorbing member, and the sound-absorbing member covers the air outlet hole. The sound-absorbing member can reduce the noise when the airflow is discharged from the air outlet hole, and is beneficial to improve the user experience. In addition, the sound-absorbing member also has the function of blocking dirt, so that the external dust, debris and other dirt can be prevented from entering the air outlet cavity through the air outlet hole.

[0027] The shell is provided with a recess corresponding to the containing cavity, and the bottom wall of the recess is provided with a ventilation hole. The containing cavity is in communication with the outside air through the ventilation hole, so that the motor can be cooled. Since the ventilation hole is arranged on the bottom wall of the recess, the liquid flowing along the surface of the shell can be prevented from flowing into the containing cavity through the ventilation hole, thereby avoiding the damage of the motor.

[0028] 6、The shell is provided with a first drain hole in communication with the air outlet cavity, so that the liquid in the air outlet cavity can be discharged in time through the first drain hole, thereby avoiding the damage of the motor caused by the liquid flowing towards the motor. The shell is provided with a second drain hole in communication with the containing cavity, so that the liquid flowing into the containing cavity can be discharged in time through the second drain hole, thereby avoiding the damage of the motor caused by the liquid flowing towards the motor. The liquid in the main machine can be discharged to the outside in time through the first drain hole and the second drain hole, which is beneficial to further improve the waterproof level of the dust collector.

[0029] 7. The filter element is removably mounted in the filter cavity of the bracket, making it easy to remove the filter element from the bracket and clean the filter element and bracket separately. A filter screen and a water shield are provided on the side wall of the bracket. The water shield covers at least the rear end of the filter screen. When the dust cup is facing upward, the water shield can prevent the dirty liquid in the dust cup from flowing through the filter screen into the filter cavity, thereby preventing the dirty liquid from flowing into the main unit when the dust cup is facing upward, causing water to enter the main unit, thereby preventing the motor and other electrical components in the main unit from being damaged by water.

[0030] 8. A ventilation opening is formed between the front end of the water shield and the filter, allowing air to flow through the ventilation opening to the filter and be filtered by the filter. When the dust cup is facing upward, the ventilation opening is located at the upper end of the water shield, that is, the ventilation opening is set at the top, preventing the dirty liquid in the dust cup from overflowing the water shield and flowing into the filter cavity through the filter.

[0031] A seal is provided at the rear end of the bracket and is located on the outer periphery of the filter chamber. The seal is used to eliminate assembly gaps that may leak air and water, thereby increasing the dirt suction strength of the airflow. It can also prevent the dirty liquid in the dust cup from flowing into the main unit through the assembly gap when the dust cup is facing upward, causing the motor and other electrical components to be damaged by water.

[0032] 9. The axial projection of the rear end of the sewage inlet channel is located in the guide cavity at the front end of the bracket. The cavity wall of the guide cavity has a blocking effect on the dirty liquid flowing into the dust cup from the sewage inlet channel. The dirty liquid flowing into the dust cup from the sewage inlet channel will flow along the cavity wall of the guide cavity and fall into the dust cup, preventing the dirty liquid flowing into the dust cup from the sewage inlet channel from spreading along the bracket toward the filter screen and flowing into the filter cavity through the filter screen.

[0033] A flap is installed inside the dust cup to open and close the waste inlet channel. The flap is flippable. When the vacuum cleaner is operating, the flap opens the waste inlet channel, allowing dirt to follow the airflow through the channel and flow into the dust cup. When the vacuum cleaner is stopped, the flap closes the channel to prevent dirt from falling out of the dust cup through the channel. The filter is located on the side of the channel facing away from the flap, keeping the filter as far away from the open side of the flap as possible. This prevents dirty liquid flowing into the dust cup from the waste inlet channel from splashing toward the filter, thereby preventing the splashed liquid from flowing through the filter and into the filter cavity.

[0034] 10. Handheld wet / dry vacuum cleaners are preferably powered by a battery module, eliminating the limitations on the vacuum cleaner's use caused by the power supply location and expanding its applicable scenarios. The housing is provided with an attachment portion that forms an attachment cavity. When the battery module is attached to the main unit, at least a portion of the battery module is inserted into the attachment cavity and covered by the attachment portion. The attachment portion prevents liquids spilled on the housing surface from flowing onto the battery module and causing water damage. This further improves the vacuum cleaner's waterproof rating and helps ensure the performance stability of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Elevation view of the example one vacuum cleaner Figure 1 ;

[0036] Figure 2 Elevation view of the example one vacuum cleaner Figure 2 ;

[0037] Figure 3 Exploded view of the example one vacuum cleaner

[0038] Figure 4 Axial sectional view of the example one vacuum cleaner

[0039] Figure 5 is Figure 4 Enlarged view of Detail J

[0040] Figure 6 Axial sectional view of the example one vacuum cleaner

[0041] Figure 7 is Figure 6 Enlarged view of Detail K

[0042] Figure 8 Exploded view of the main unit of the example one vacuum cleaner

[0043] Figure 9 Partial view of the front housing of the example one vacuum cleaner

[0044] Figure 10 View of the airflow generation assembly of the example one vacuum cleaner

[0045] Figure 11 Axial sectional view of the airflow generation assembly of the example one vacuum cleaner

[0046] Figure 12 View of the fan of the example one vacuum cleaner

[0047] Figure 13 Axial sectional view of the fan of the example one vacuum cleaner

[0048] Figure 14 View of the filter assembly of the example one vacuum cleaner

[0049] Figure 15 Exploded view of the filter assembly of the example one vacuum cleaner

[0050] Figure 16 Exploded view of the support and the water shield of the example one vacuum cleaner

[0051] Figure 17 Partial sectional view of the example one vacuum cleaner in normal use

[0052] Figure 18 Figure 1 is a partial sectional view of the example one vacuum cleaner with the dust cup facing upward;

[0053] Figure 19 Figure 2 is a structural diagram of the main machine and the battery module in the example two vacuum cleaner.

[0054] In the figure, 10-main machine, 10A-air inlet cavity, 10B-air outlet cavity, 10C- containing cavity, 10D-first separation structure, 10E-second separation structure, 20-dust cup, 30-filter assembly, 40-battery module,

[0055] 100-housing, 111-air inlet hole, 112-air outlet hole, 120-front shell, 121-shell cover, 122-shell seat, 123-clamping groove, 124-convex rib, 125-groove, 126-limiting groove, 127-first water leakage hole, 128-lower convex buckle, 129-retaining ring, 130-rear shell, 131-left half shell, 132-right half shell, 133-handle, 134-second water leakage hole, 135-vent hole, 136-recess, 137-clamping convex edge, 138-water retaining edge, 140-attachment part, 141-left retaining edge, 142-right retaining edge, 143-front retaining edge, 150-attachment cavity, 151-first sealing ring, 152-second sealing ring, 160-silencer, 171-buckle, 172-spring,

[0056] 200-air flow generating assembly, 210-motor, 211-rotating shaft, 220-fan blade, 221-front plate body, 222-rear plate body, 223-blade, 224-shaft hole, 230-air guide cover, 231-air guide cavity, 232-air guide inlet, 233-air guide outlet, 234-cover, 2341-annular surrounding plate, 235-bottom plate, 2351-annular convex edge, 2352-widened part,

[0057] 310-bracket, 311-filter cavity, 312-main shell, 313-supporting part, 314-step surface, 315-screw groove, 316-guiding cavity, 317-insertion slot, 320-filtering piece, 321-hepa, 322-front end cover, 323-rear end cover, 324-passage, 325-screwing rib, 326-screw buckle, 330-filter screen, 340-water retaining cover, 350-ventilation opening, 360-sealing piece, 361-third sealing ring, 362-fourth sealing ring, 363-fifth sealing ring,

[0058] 410-pollution inlet channel, 411-front channel, 412-rear channel, 420-cup body, 421-sleeve, 422-positioning groove, 423-upper convex buckle, 424-clamping groove, 430-pollution inlet pipe, 440-retaining piece, 441-positioning block,

[0059] 510-switch, 520-push block, 530-trigger,

[0060] AF - air flow. DETAILED DESCRIPTION

[0061] The utility model will be further described below in connection with the drawings and specific embodiments. It should be understood that the following "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "vertical", "horizontal", "top", "bottom" and other words indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device / element must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model.

[0062] Embodiment one

[0063] In combination Figures 1 to 18 , the utility model embodiment one provides a kind of handheld dry-wet dual-purpose dust collector, comprising:

[0064] Host 10, including shell 100 and the airflow generating assembly 200 for being located in shell 100, airflow generating assembly 200 includes fan blade 220 and the motor 210 for driving fan blade 220;

[0065] Dust cup 20 can be detachably attached to the front end of host 10, and the dust cup 20 is provided with a dirty channel 410;

[0066] Filter assembly 30 can be detachably installed in dust cup 20;

[0067] The motor 210 drives fan blade 220 to rotate and form the airflow (AF) from the dirty channel 410 into dust cup 20 and flow to host 10 after flowing through filter assembly 30;

[0068] Host 10 is provided with independent air inlet cavity 10A, air outlet cavity 10B and containing cavity 10C, shell 100 is provided with air inlet hole 111 connected to air inlet cavity 10A and air outlet hole 112 connected to air outlet cavity 10B, and motor 210 is located in containing cavity 10C, and the airflow (AF) from air inlet hole 111 into air inlet cavity 10A flows to air outlet cavity 10B and is discharged from host 10 through air outlet hole 112.

[0069] When the dust collector is working, the motor 210 drives the fan blade 220 to rotate at high speed to generate negative pressure in the dust cup 20, external air flows into the dust cup 20 through the dirt inlet channel 410 to form an air flow (AF), dirt flows into the dust cup 20 along with the air flow (AF), the air flow (AF) flows into the air inlet cavity 10A from the air inlet hole 111 after being filtered by the filter assembly 30, and the air flow (AF) flowing into the air inlet cavity 10A flows to the air outlet cavity 10B and is discharged from the main machine 10 through the air outlet hole 112. When the dust collector is used to collect dirty liquid, because the air outlet cavity 10B and the containing cavity 10C are independent of each other, the air flow (AF) carrying water vapor is directly discharged from the main machine 10 through the air outlet cavity 10B and the air outlet hole 112, and the air flow (AF) carrying water vapor does not flow through the containing cavity 10C, thereby avoiding the air flow (AF) carrying water vapor from contacting the motor 210, preventing water droplets formed by condensation of water vapor from adhering to the motor 210, and preventing the motor 210 from being damaged by water, thereby improving the waterproof level of the dust collector and ensuring the performance stability of the motor 210. Because the air outlet cavity 10B is relatively independently arranged, the air flow (AF) carrying water vapor also cannot flow through the gap to other spaces in the main machine 10, thereby facilitating protection of electrical elements including the motor 210, allowing the waterproof level of the dust collector to reach IPX4, improving the waterproof capability of the dust collector, and allowing the dust collector to meet the use requirements for both dry and wet use.

[0070] In combination with Figure 3 , Figure 6 , Figure 8 , in the embodiment, the shell 100 includes a front shell body 120 and a rear shell body 130 distributed front and rear, wherein the front shell body 120 preferably adopts a shell structure matched front and rear, and the rear shell body 130 preferably adopts a shell structure opened left and right. Specifically, the front shell body 120 includes a shell cover 121 and a shell base 122, the shell cover 121 is fixed to the front side of the shell base 122, the shell cover 121 and the shell base 122 cooperatively form a hollow cavity, the fan blade 220 is arranged in the front shell body 120, and the air inlet cavity 10A and the air outlet cavity 10B are also respectively formed by part of the cavity of the front shell body 120. The rear shell body 130 includes a left half shell 131 and a right half shell 132 arranged substantially symmetrically left and right, and the left half shell 131 and the right half shell 132 are fixed together. The rear side of the shell base 122 is provided with a non-circular clamping groove 123, the front side of the left half shell 131 and the right half shell 132 is provided with a clamping convex edge 137 matched with the clamping groove 123, and when the left half shell 131 and the right half shell 132 are fixed together, the clamping convex edge 137 is embedded in the clamping groove 123 to realize the connection between the front shell body 120 and the rear shell body 130, and the clamping groove 123 and the clamping convex edge 137 are consistent in shape and can be arranged in an elliptical shape, a D shape, a rounded rectangular shape or other non-circular shapes. The top side of the rear shell body 130 is formed with a handle 133, the handle 133 extends substantially along the front and rear directions, and a user can hold the dust collector by the handle 133 during use.

[0071] In combination with Figure 10 ,Figure 11 The motor 210 has a rotating shaft 211, and the fan blade 220 is sleeved on the rotating shaft 211, so that the motor 210 can drive the fan blade 220 to rotate at a high speed. In combination with Figure 12 、 Figure 13 In this embodiment, the fan blade 220 includes a front plate body 221, a rear plate body 222, and a blade 223. The front plate body 221 and the rear plate body 222 are spaced apart front to back, and the blade 223 is arranged between the front plate body 221 and the rear plate body 222. The front side of the blade 223 is connected to the front plate body 221, and the rear side of the blade 223 is connected to the rear plate body 222. The front plate body 221 and the rear plate body 222 are both substantially circular thin plates. The center of the front plate body 221 is provided with an opening, and the center of the rear plate body 222 is provided with a shaft hole 224 matched with the rotating shaft 211. The fan blade 220 is fixedly sleeved on the rotating shaft 211 through the cooperation of the shaft hole 224 and the rotating shaft 211. The blade 223 is spaced apart and distributed in a circumferential direction. The cross-sectional shape of the blade 223 perpendicular to the axial direction is arc-shaped and arranged in a centrifugal manner relative to the rotating shaft 211.

[0072] In this embodiment, the airflow generating assembly 200 further includes an air guide cover 230. The air guide cover 230 is positioned in the front shell 120. The air guide cover 230 has an air guide cavity 231, an air guide inlet 232, and an air guide outlet 233. The air guide cavity 231 is located downstream of the air inlet cavity 10A and upstream of the air outlet cavity 10B. The fan blade 220 is arranged in the air guide cavity 231. The air guide inlet 232 is connected between the air inlet cavity 10A and the air guide cavity 231. The air guide outlet 233 is connected between the air guide cavity 231 and the air outlet cavity 10B. Specifically, the air guide cover 230 includes a cover cap 234 and a bottom plate 235 arranged front to back. The outer edge of the cover cap 234 is provided with an annular surrounding plate 2341 extending rearward along the axial direction. The outer edge of the bottom plate 235 is provided with an annular convex edge 2351 extending rearward along the axial direction. The rear end of the annular surrounding plate 2341 is sleeved outside the annular convex edge 2351, so that the cover cap 234 and the bottom plate 235 form the air guide cavity 231. In this embodiment, the air inlet cavity 10A is located at the front side of the air guide cover 230. The air guide inlet 232 is arranged at the center of the cover cap 234. The annular surrounding plate 2341 forms the annular side wall of the air guide cover 230. The air outlet cavity 10B is located at the outer periphery of the air guide cover 230. The air guide outlet 233 is arranged on the annular surrounding plate 2341 and spaced apart. As a feasible scheme of this embodiment, the air guide outlet 233 can be formed by stamping the annular surrounding plate 2341.

[0073] In combination with Figure 6In the embodiment, the front part of the motor 210 extends into the front shell 120, the shell cover 121 of the front shell 120 is provided with a ring of rearwardly extending protrusions 124, the air inlet cavity 10A is formed by the shell cover 121, the protrusions 124 and the cover 234, the air inlet hole 111 is arranged on the shell cover 121 and located at the inner periphery of the protrusions 124. The air outlet cavity 10B is formed by the protrusions 124, the outer surface of the air guide cover 230 and the inner surface of the front shell 120, the air outlet cavity 10B is located at the outer periphery of the air inlet cavity 10A and the air guide cavity 231, the air inlet cavity 10A and the air guide cavity 231 are communicated through the air guide inlet 232 on the cover 234, the air outlet cavity 10B and the air guide cavity 231 are communicated through the air guide outlet 233 on the annular surrounding plate 2341. In addition, the containing cavity 10C is formed by the bottom plate 235 and the front part of the rear shell 130.

[0074] In order to avoid the air leakage between the air inlet cavity 10A and the air outlet cavity 10B, the first separation structure 10D for separating the air inlet cavity 10A and the air outlet cavity 10B is arranged between the air guide cover 230 and the front shell 120. Specifically, the first separation structure 10D includes a first sealing ring 151, the first sealing ring 151 is clamped between the protrusions 124 of the shell cover 121 and the cover 234 of the air guide cover 230, the circumferential sealing fit between the protrusions 124 and the cover 234 is realized by the first sealing ring 151, and the fit gap between the protrusions 124 and the cover 234 is eliminated. In addition, the bottom plate 235 of the air guide cover 230 is positioned on the outside of the front end of the motor 210, and the protrusions 124 press the first sealing ring 151 on the cover 234, so that the air guide cover 230 is axially positioned, so that the air guide cover 230 is positioned in the front shell 120.

[0075] In order to avoid the air leakage between the air outlet cavity 10B and the containing cavity 10C, the second separation structure 10E for separating the air outlet cavity 10B and the containing cavity 10C is arranged between the air guide cover 230 and the casing 100. Combined with the above description of the first separation structure 10D, Figure 5 Specifically, a ring of grooves 125 is arranged on the inner wall of the shell seat 122, the second separation structure 10E includes a second sealing ring 152, the second sealing ring 152 is pressed into the grooves 125 by the annular protrusions 2351, the circumferential sealing fit between the air guide cover 230 and the front shell 120 is realized by the second sealing ring 152, and the fit gap between the air guide cover 230 and the front shell 120 is eliminated. Further, the rear end of the annular protrusions 2351 is provided with a ring of widened portions 2352 protruding radially outward, the contact area between the annular protrusions 2351 and the second sealing ring 152 is increased by the widened portions 2352, and the pressing effect of the annular protrusions 2351 on the second sealing ring 152 is improved.

[0076] In this embodiment, the air inlet hole 111 is preferably provided in the form of a grid hole, and the shell cover 121 is provided with a forwardly protruding retaining ring 129 located outside the outer ring of the protruding rib 124, and the air inlet hole 111 is located in the inner periphery of the retaining ring 129. The air outlet hole 112 is provided on the left and right side walls of the shell seat 122 in the form of a grid hole, and the inner side of the shell seat 122 is provided with a sound-absorbing member 160 covering the air outlet hole 112. Specifically, the sound-absorbing member 160 can be a wind-permeable sponge strip, and two sponge strips are provided on the inner sides of the left and right side walls of the shell seat 122, respectively. The sponge strips cover the air outlet hole 112 on the same side, and the sponge strips have a noise reduction effect on the airflow (AF) discharged from the air outlet hole 112, which can reduce the working noise of the dust collector. In addition, the sponge strip also has a certain dirt blocking effect, which can prevent external dust and debris from entering the air outlet cavity 10B through the air outlet hole 112. As an alternative to this embodiment, the sound-absorbing member 160 can also be made of other materials with wind-permeable and noise-absorbing functions. In order to limit the sound-absorbing member 160, the end of the sound-absorbing member 160 is inserted into the limiting groove 126 composed of a positioning rib.

[0077] In combination Figure 2 The water vapor flowing with the airflow (AF) will condense into water droplets during the flow process. In order to timely discharge the liquid in the air outlet cavity 10B, the bottom side of the front shell 120 is provided with a first drain hole 127 communicating with the air outlet cavity 10B, and the liquid in the air outlet cavity 10B can be discharged outward in time through the first drain hole 127. In order to timely discharge the liquid in the containing cavity 10C, the bottom side of the rear shell 130 is provided with a second drain hole 134 communicating with the containing cavity 10C, and the liquid in the containing cavity 10C can be discharged outward in time through the second drain hole 134.

[0078] In combination Figure 2 The left and right sides of the front end of the rear shell 130 are provided with ventilation holes 135 for communicating the containing cavity 10C with the external air, so that the airflow between the containing cavity 10C and the external air can be formed through the ventilation holes 135, which is beneficial to the heat dissipation of the motor 210. In order to avoid the situation that the liquid falling on the rear shell 130 flows into the containing cavity 10C through the ventilation hole 135 and causes the motor 210 to be damaged by water, in this embodiment, the left and right sides of the front end of the rear shell 130 are provided with recesses 136 recessed towards the inside of the motor 210, and the ventilation holes 135 are provided on the bottom wall of the recess 136. When liquid falls on the rear shell 130, the liquid flows downward along the outer surface of the rear shell 130 and drips downward from the upper edge of the recess 136, and the liquid cannot flow along the inner wall of the recess 136 and flow into the containing cavity 10C through the ventilation hole 135. As an alternative to this embodiment, the ventilation hole 135 can also be provided on the bottom side of the front end of the rear shell 130; in addition, the rear shell 130 can also cancel the provision of the recess 136.

[0079] In combination Figure 4 In this embodiment, the dust cup 20 comprises a cup body 420 and a dirt inlet pipe 430. The cup body 420 is provided with an opening at the rear end. The dust cup 20 is provided with a sleeve 421 extending from the front end to the rear end. The rear end of the dirt inlet pipe 430 is inserted into the sleeve 421 to be connected to the cup body 420. The front end of the dirt inlet pipe 430 extends out of the cup body 420. The hollow inner cavity of the dirt inlet pipe 430 forms a front passage 411. The hollow inner cavity of the sleeve 421 forms a rear passage 412. The front passage 411 and the rear passage 412 combine to form a dirt inlet passage 410. Alternatively, the dirt inlet pipe 430 and the cup body 420 can be integrally formed.

[0080] In this embodiment, the dust cup 20 is further provided with a shutter 440 for opening and closing the dirt inlet passage 410. When the motor 210 is started and drives the fan blade 220 to rotate, the shutter 440 opens the dirt inlet passage 410 so that the dirt can flow into the dust cup 20 through the dirt inlet passage 410 following the airflow (AF). When the motor 210 is stopped, the shutter 440 closes the dirt inlet passage 410 to prevent the dirt in the dust cup 20 from falling out through the dirt inlet passage 410. Specifically, the top side of the sleeve 421 is provided with a positioning groove 422. The top side of the shutter 440 is provided with a positioning block 441 protruding rearward. The positioning block 441 is inserted into the positioning groove 422 so that the shutter 440 can be flipped up and down in the cup body 420 and located at the rear end of the sleeve 421. Normally, the shutter 440 is attached to the rear end surface of the sleeve 421 and closes the rear end of the dirt inlet passage 410. When the motor 210 is started and drives the fan blade 220 to rotate, the shutter 440 is flipped up by the negative pressure to open the dirt inlet passage 410. When the motor 210 is stopped, the shutter 440 is flipped down to reset and close the dirt inlet passage 410. Alternatively, the shutter 440 can be made of a material with elasticity such as silicone or rubber.

[0081] In this embodiment, the dust cup 20 is detachably attached to the front end of the main machine 10 by a snap structure. Specifically, the top wall of the cup body 420 is provided with an upper protruding buckle 423 outside the rear end, the bottom wall of the cup body 420 is provided with a clamping groove 424 at the rear end, the top side of the front shell 120 is hingedly connected with a buckle 171 matched with the upper protruding buckle 423, the buckle 171 and the front shell 120 are provided with a spring 172 biasing the buckle 171 towards the direction matched with the upper protruding buckle 423, and the bottom side of the front shell 120 is provided with a lower protruding buckle 128 matched with the clamping groove 424. When the dust cup 20 is attached to the main machine 10, the rear end of the dust cup 20 is sleeved on the outer periphery of the front end of the front shell 120, the lower protruding buckle 128 is inserted into the clamping groove 424, and the buckle 171 is buckled with the upper protruding buckle 423. When it is needed to detach the dust cup 20 from the main machine 10, force is applied to the buckle 171 to make the buckle 171 rotate against the bias of the spring 172 and unbuckle the upper protruding buckle 423, and then the lower protruding buckle 128 is disengaged from the clamping groove 424, so that the locking between the dust cup 20 and the main machine 10 is released.

[0082] In combination Figure 14 , Figure 15In the embodiment, the filter assembly 30 comprises a filter piece 320 and a bracket 310, the bracket 310 is provided with a filter cavity 311 with an open rear end, the filter piece 320 is detachably installed in the filter cavity 311, the sidewall of the bracket 310 is provided with a filter screen 330 and a water baffle cover 340 located outside the filter screen 330, the water baffle cover 340 covers at least the rear end of the filter screen 330 to prevent the liquid in the dust cup 20 from flowing into the filter cavity 311 through the filter screen 330 when the dust cup 20 is upward. Specifically, the filter piece 320 comprises a HEPA 321 surrounding a cylinder, a front end cover 322 provided at the front end of the HEPA 321, and a rear end cover 323 provided at the rear end of the HEPA 321. In order to increase the filtering area, the HEPA 321 adopts a pleated structure and surrounds a cylinder, the front end cover 322 is closed, the rear end cover 323 is provided with a through hole 324 and a screw rib 325, the through hole 324 is located at the center of the rear end cover 323 and can communicate with the air inlet hole 111, and the screw rib 325 is used by the user to hold the filter piece 320 for dismounting from the bracket 310. The bracket 310 comprises a main shell 312 and a support part 313 which are integrally formed, the support part 313 is provided at the rear end of the main shell 312 and extends outward along the radial direction of the main shell 312, the shape of the support part 313 is matched with the shape of the rear end of the dust cup 20 so that the filter assembly 30 can be stably erected in the dust cup 20, and the detachable cooperation structure between the bracket 310 and the dust cup 20 can refer to the prior art, which will not be described here. The filter screen 330 is provided with uniformly distributed filter holes with very small diameters, the filter screen 330 is used to perform primary filtration on the airflow (AF) to avoid large particles, debris and other dirt from flowing into the filter cavity 311 with the airflow (AF), and the HEPA 321 of the filter piece 320 is used to perform secondary filtration on the airflow (AF) to avoid dust and other small dirt from flowing into the main machine 10 with the airflow (AF). The filter screen 330 is preferably provided on the top side of the main shell 312, on the one hand, the filter screen 330 is arranged as far away from the dirt in the dust cup 20 as possible to avoid the splashing of the dirty liquid in the dust cup 20 through the filter holes on the filter screen 330 into the filter cavity 311, and on the other hand, the filter screen 330 is located on the side opposite to the opening of the dirt inlet channel 410 by the flapper 440, that is, the filter screen 330 and the main body part of the flapper 440 are located on the upper and lower sides of the positioning block 441 respectively, so that the filter screen 330 is as far away from the opening side of the flapper 440 as possible to avoid the splashing of the dirty liquid flowing into the dust cup 20 from the dirt inlet channel 410 towards the filter screen 330, and further avoid the splashing of the dirty liquid flowing into the filter cavity 311 through the filter screen 330.

[0083] In combination Figure 16In the embodiment, the water baffle 340 is substantially U-shaped towards the side of the filter screen 330, the support 310 is provided with a substantially U-shaped insertion slot 317 at the periphery of the rear end of the filter screen 330, and the side of the water baffle 340 towards the filter screen 330 is inserted into the insertion slot 317 to be connected to the support 310. The water baffle 340 covers the rear end of the filter screen 330, and the front end of the water baffle 340 and the filter screen 330 have a ventilation opening 350, so that the airflow (AF) flowing through the dust cup 20 can flow to the filter screen 330 through the ventilation opening 350. As an alternative to the embodiment, the water baffle 340 can also cover the entire filter screen 330. At this time, the front end of the water baffle 340 and the filter screen 330 still have a ventilation opening 350.

[0084] The filter 320 is detachably installed on the support 310 through a screwing structure. Specifically, the outer periphery of the rear end cover 323 is provided with a plurality of circumferentially spaced screwing portions 326, the inner wall of the rear end of the support 310 is provided with a step surface 314, the rear side of the step surface 314 is provided with a screwing groove 315 matched with the screwing portion 326, and the filter 320 is detachably installed on the support 310 through the matching of the screwing portion 326 and the screwing groove 315. The rear end cover 323 is in abutment with the step surface 314 to axially position the filter 320.

[0085] In order to avoid air and water leakage between the dust cup 20 and the main machine 10 due to the cooperation gap, the rear end of the support 310 is provided with a sealing member 360 located at the outer periphery of the filter chamber 311. In combination with Figure 7 In the embodiment, the sealing member 360 includes a third sealing ring 361 positioned on the step surface 314, a fourth sealing ring 362 positioned on the rear end surface of the support portion 313, and a fifth sealing ring 363 positioned on the outer peripheral surface of the support portion 313. When the filter 320 is installed on the support 310, the third sealing ring 361 is in abutment with the rear end cover 323 to eliminate the assembly gap between the filter 320 and the support 310. When the filter assembly 30 is installed in the dust cup 20, the fifth sealing ring 363 is in abutment with the inner surface of the dust cup 20 to eliminate the assembly gap between the filter assembly 30 and the dust cup 20. When the dust cup 20 with the installed filter assembly 30 is attached to the main machine 10, the fourth sealing ring 362 is in abutment with the stop ring 129 on the shell cover 121 to eliminate the assembly gap between the filter assembly 30 and the main machine 10. In combination with Figure 17 In the normal use state of the dust collector, the dust cup 20 faces downward, and the dirt in the dirt inlet channel 410 falls on the front part of the dust cup 20 after entering the dust cup 20, and the dirty liquid in the dirt does not flow towards the main machine 10. In combination with Figure 18When the dust cup 20 is upward relative to the main body 10, the dirt from the dirt inlet channel 410 falls at the rear of the dust cup 20. Since the sealing member 360 substantially eliminates the assembly gap through which the liquid can flow downward, the dirty liquid in the dust cup 20 cannot flow downward toward the main body 10 through the assembly gap. In addition, the dirty liquid in the dust cup 20 cannot flow into the filter chamber 311 through the filter screen 330 due to the blocking effect of the water baffle 340. As a feasible solution of the present embodiment, the third sealing ring 361 and the fourth sealing ring 362 can be integrally formed.

[0086] In combination Figure 4 , the lower portion of the front end of the main shell 312 is recessed rearward to form a guide chamber 316. The axial projection of the rear end of the dirt inlet channel 410 is located in the guide chamber 316. The chamber wall of the guide chamber 316 has a blocking effect on the dirty liquid flowing from the dirt inlet channel 410 into the dust cup 20. The dirty liquid flowing from the dirt inlet channel 410 into the dust cup 20 flows downward along the chamber wall of the guide chamber 316 and falls in the dust cup 20, thereby avoiding the dirty liquid flowing from the dirt inlet channel 410 into the dust cup 20 spreading toward the filter screen 330 along the support 310 and flowing into the filter chamber 311 through the filter screen 330. Figure 4 The straight line L1 and the straight line L2 in the drawing represent the boundaries of the axial projection of the rear end of the dirt inlet channel 410. The straight line L1 and the straight line L2 fall within the range of the guide chamber 316, so that the axial projection of the rear end of the dirt inlet channel 410 is located within the range of the guide chamber 316.

[0087] In combination Figure 1 , Figure 2 , the dust collector of the present embodiment preferably adopts a cordless structure. The dust collector further includes a battery module 40 for power supply. The rear shell 130 of the casing 100 is provided with an attachment portion 140 for mounting the battery module 40. The attachment portion 140 is formed with an attachment chamber 150 for accommodating the battery module 40. At least a part of the battery module 40 is covered by the attachment portion 140 when mounted in the attachment chamber 150. Specifically, the attachment portion 140 is located substantially below the handle 133. The attachment portion 140 includes a left stop edge 141, a right stop edge 142, and a front stop edge 143. The three stop edges of the attachment portion 140 enclose the attachment chamber 150 which is open at the bottom and rear sides. The battery module 40 can be inserted into the attachment chamber 150 from rear to front. When the battery module 40 is connected to the main body 10, the upper portion of the battery module 40 is located in the attachment chamber 150 and covered by the attachment portion 140. Water dripping on the rear shell 130 can drip downward along the attachment portion 140, thereby avoiding the water flowing along the surface of the rear shell 130 to the battery module 40 and causing the battery module 40 to be damaged by water.

[0088] In combination Figure 4The handle 133 is internally provided with a switch 510 for starting the motor 210, and the front end of the handle 133 is provided with a push block 520 for switching the state of the switch 510. For example, when the push block 520 is pushed forward, the switch 510 is switched from the off state to the on state, and the motor 210 is powered on and started; when the push block 520 is pushed backward, the switch 510 is switched from the on state to the off state, and the motor 210 is powered off and stopped. As an alternative to this embodiment, a button or a knob can be used instead of the push block 520. As an alternative to this embodiment, the switch 510 can be a micro switch.

[0089] To avoid the liquid on the handle 133 from seeping into the rear shell 130 from the assembly gap between the push block 520 and the handle 133, a waterproof cap can be provided on the handle 133 to cover the push block 520. The waterproof cap can be made of flexible materials such as silicone or rubber, which can cover the assembly gap between the push block 520 and the handle 133, and ensure that the dust collector meets the IPX4 waterproof level requirement.

[0090] When the dust collector needs to be used, the filter assembly 30 is installed in the dust cup 20, and then the dust cup 20 and the battery module 40 are attached to the main machine 10. The user can hold the whole machine by the handle 133 with one hand. During the operation of the dust collector, the motor 210 drives the fan blade 220 to rotate at high speed to generate negative pressure suction, the dust cup 20 is in a negative pressure state, the baffle 440 opens the dirt inlet channel 410, and the air outside carries dirt into the dust cup 20 from the dirt inlet channel 410 under the action of the air pressure difference, the filter screen 330 performs primary filtration on the airflow (AF) so that the dirt mainly falls into the dust cup 20, the airflow (AF) filtered by the filter screen 330 flows into the filter cavity 311 and is subjected to secondary filtration by the filter element 320, the airflow (AF) filtered by the filter element 320 flows into the air inlet cavity 10A from the air inlet hole 111, the airflow (AF) flowing into the air inlet cavity 10A flows into the air guide cavity 231 through the air guide inlet 232, the airflow (AF) flowing into the air guide cavity 231 flows into the air outlet cavity 10B through the air guide outlet 233, and the airflow (AF) flowing into the air outlet cavity 10B is discharged from the main machine 10 through the sound-absorbing element 160 and the air outlet hole 112. Since the airflow (AF) does not flow through the containing cavity 10C, the water vapor carried by the airflow (AF) will not come into contact with the motor 210 and other electrical elements in the main machine 10, thereby avoiding the risk of water droplets formed by the condensation of water vapor adhering to the motor 210 and causing the motor 210 to be damaged by water, and avoiding the risk of other electrical elements in the main machine 10 being damaged by water, and improving the overall waterproof level of the dust collector. When the dust cup 20 is upward, the dirty liquid in the dust cup 20 cannot flow toward the main machine 10 under the blocking action of the water baffle 340 and the sealing element 360, thereby avoiding the risk of the main machine 10 being damaged by water.

[0091] Embodiment Two

[0092] In combinationFigure 19 The difference between the embodiment and the first embodiment is that the trigger 530 is used instead of the push block 520 in the first embodiment. The trigger 530 is preferably pivotable at the bottom side of the front end of the handle 133. The switch 510 is arranged in the front end of the handle 133 and corresponds to the trigger 530. When the user holds the handle 133, the user can press the trigger 530 with the index finger. When the trigger 530 is pressed, the trigger 530 acts on the switch. The switch is switched from the off state to the on state, and the cleaner is started. When the trigger 530 is released, the trigger 530 does not act on the switch. The switch is switched from the on state to the off state, and the cleaner is stopped.

[0093] In order to avoid that the liquid on the handle 133 seeps into the rear shell 130 from the gap between the trigger 530 and the handle 133, the handle 133 is provided with a water retaining edge 138 extending downward from the periphery of the trigger 530. The liquid on the handle 133 flows downward and can drip downward along the water retaining edge 138. The liquid is prevented from spreading toward the trigger 530 during the downward flow and seeping into the rear shell 130. The waterproof capability of the cleaner is further improved. As an optional solution of the embodiment, the water retaining edge 138 can be arranged around the trigger 530. The water retaining edge 138 can also be arranged only at the periphery of the trigger 530. In addition, the height of the downward extension of the water retaining edge 138 should be appropriate. The rotation angle of the trigger 530 is not limited, and the trigger 530 can smoothly trigger the switch.

[0094] The other structures of the second embodiment are the same as those of the first embodiment, and will not be described here.

[0095] In addition to the preferred embodiments, the utility model also has other embodiments. Those skilled in the art can make various changes and modifications according to the utility model, as long as the changes and modifications do not deviate from the spirit of the utility model, and all the changes and modifications should belong to the scope defined in the claims of the utility model.

Claims

1. A hand-held dry-wet vacuum cleaner, comprising: a main body including a housing and an air flow generating assembly arranged in the housing, the air flow generating assembly including a fan blade and a motor for driving the fan blade; a dust cup detachably attached to a front end of the main body, the dust cup being provided with a dirty air inlet channel; a filter assembly detachably installed in the dust cup; and the motor driving the fan blade to rotate to form an air flow from the dirty air inlet channel into the dust cup and to the main body after flowing through the filter assembly; characterized in that the main body is provided with an air inlet cavity, an air outlet cavity and a receiving cavity which are independent of each other, the housing is provided with an air inlet hole communicating with the air inlet cavity and an air outlet hole communicating with the air outlet cavity, and the motor is arranged in the receiving cavity, the air flow flowing into the air inlet cavity from the air inlet hole flows to the air outlet cavity and is discharged from the main body through the air outlet hole.

2. A hand-held dust extractor according to claim 1, characterised in that the air flow generating assembly further includes a wind guide cover arranged in the housing, the wind guide cover having a wind guide cavity, a wind guide inlet and a wind guide outlet, the wind guide cavity being located downstream of the air inlet cavity and upstream of the air outlet cavity, the fan blade being arranged in the wind guide cavity, the wind guide inlet communicating the air inlet cavity with the wind guide cavity, and the wind guide outlet communicating the wind guide cavity with the air outlet cavity.

3. A hand-held wet / dry vacuum cleaner as claimed in claim 2, wherein, the air inlet cavity is located at a front side of the wind guide cover, and the wind guide inlet is arranged at the front side of the wind guide cover; and / or, the air outlet cavity is located at an outer periphery of the wind guide cover, and the wind guide outlet is arranged on an annular peripheral wall of the wind guide cover and is spaced apart from each other.

4. The hand-held wet / dry vacuum cleaner of claim 2, wherein, at least a part of the air outlet cavity is located at an outer periphery of the air inlet cavity, and a first separation structure is arranged between the wind guide cover and the housing for separating the air inlet cavity from the air outlet cavity; and / or, a second separation structure is arranged between the wind guide cover and the housing for separating the air outlet cavity from the receiving cavity.

5. The hand-held wet / dry vacuum cleaner of claim 1, wherein, an inner wall of the housing is provided with a sound insulation member covering the air outlet hole; and / or, the housing is provided with a concave recess corresponding to the receiving cavity, and a ventilation hole is arranged on a bottom wall of the recess and communicates with the receiving cavity.

6. The hand-held wet / dry vacuum cleaner of claim 1, wherein, the housing is provided with a first water drain hole communicating with the air outlet cavity; and / or, the housing is provided with a second water drain hole communicating with the receiving cavity.

7. The hand-held wet / dry vacuum cleaner of claim 1, wherein, the filter assembly includes a filter member and a bracket, the bracket being provided with a filter cavity with an open rear end, the filter member being detachably installed in the filter cavity, a filter screen and a water baffle cover located outside the filter screen are arranged on a side wall of the bracket, and the water baffle cover covers at least a rear end of the filter screen to prevent liquid in the dust cup from flowing into the filter cavity through the filter screen when the dust cup is upward.

8. A hand held wet and dry vacuum cleaner as claimed in claim 7, characterised in that, a ventilation opening is formed between a front end of the water baffle cover and the filter screen; and / or, a sealing member is arranged at a rear end of the bracket and located at an outer periphery of the filter cavity to prevent liquid in the dust cup from flowing to the main body.

9. The hand-held wet / dry vacuum cleaner of claim 7, wherein, a part of a front end of the bracket is recessed rearward to form a guide cavity, and an axial projection of a rear end of the dirty air inlet channel is located in the guide cavity; and / or, a shutter is arranged in the dust cup for opening and closing the dirty air inlet channel, the shutter is arranged to be flipped, and the filter screen is arranged on a side facing away from the shutter opening the dirty air inlet channel.

10. The hand-held wet / dry vacuum cleaner of claim 1, wherein, the hand-held dry-wet vacuum cleaner further includes a battery module, the housing is provided with an attachment portion for installing the battery module, the attachment portion forms an attachment cavity for accommodating the battery module, and at least a part of the battery module is covered by the attachment portion when installed in the attachment cavity.

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