CN112754347A

CN112754347A - Hand-held vacuum cleaner

Info

Publication number: CN112754347A
Application number: CN202011544810.5A
Authority: CN
Inventors: 杨勇
Original assignee: Shenzhen 3irobotix Co Ltd
Current assignee: Shenzhen 3irobotix Co Ltd
Priority date: 2020-12-23
Filing date: 2020-12-23
Publication date: 2021-05-07

Abstract

A hand-held vacuum cleaner comprising: a main housing; a handle; the fan assembly is arranged in the main shell; the handle is internally provided with an accommodating space, and at least part of the battery pack is arranged in the accommodating space; the battery heat dissipation frame is at least partially arranged on the handle and used for supporting the battery pack and forming a cooling air channel passing through the battery pack, and the fan assembly is provided with an air passing opening for supplying air to flow to the cooling air channel; the cooling air duct is provided with an air inlet and an air outlet, the air inlet is communicated with the air passing opening, and under the condition that the fan assembly operates, at least part of air flow flows out of the air passing opening, enters the cooling air duct through the air inlet, flows through the battery pack and flows out of the air outlet; the cooling air duct comprises a first air duct and a second air duct, a battery pack is arranged in the first air duct, and the second air duct is located outside the battery pack and separated from the battery pack. The application provides a handheld dust catcher forms the cooling duct through the battery heat dissipation frame, utilizes fan unit moving air current to dispel the heat to the group battery, and the radiating effect is good.

Description

Hand-held vacuum cleaner

[ technical field ] A method for producing a semiconductor device

The invention relates to the field of dust collection equipment, in particular to a handheld dust collector.

[ background of the invention ]

The vacuum cleaner is increasingly popular with the majority of users as a cleaning household appliance, and especially a handheld vacuum cleaner product is popular with the users because the handheld vacuum cleaner is powered by a battery and is not bound by a power line when in use. Along with the development of dust collector products, a plurality of light-weight products appear, wherein the dust collector products represented by the convenient suction are popular with a part of young and white collars due to low price, low weight and convenient use, and the battery pack is usually arranged in the handle, so that the gravity center of the whole machine can be firmly held in the hand, and the use is particularly convenient.

Although the portable suction type product is convenient to use, the portable suction type product basically abandons the performance of a plurality of dust collectors because the portable suction type product is only light, for example, the portable suction type product has very low suction power, mainly because the portable suction type product adopts a low-power motor, the weight of a battery can be smaller, and because the low-power motor is adopted, the current of the battery is smaller, the heat generation is not obvious, and the surface of a handle is not too hot. Therefore, the portable hand-held cleaner can be carried conveniently, and the dust suction capability is sacrificed.

However, if the suction force is increased in order to improve the dust collection performance, the heat generated by the battery is increased, and the handle has obvious hand scalding feeling. Therefore, a handheld dust collector which has large suction force, good heat dissipation of a battery and no scalding in holding is urgently needed.

[ summary of the invention ]

The invention aims to provide a portable handheld dust collector, a handle is arranged in a battery pack, the heat dissipation effect is good, and the hand can not be scalded when being held.

The purpose of the invention is realized by the following technical scheme:

a hand-held vacuum cleaner comprising:

a main housing;

a handle connected to or integrally formed with the main housing, the handle having a gripping area for a user to grip;

a fan assembly for driving an air flow to generate a negative pressure, the fan assembly disposed within the main housing;

the main air outlet is arranged on the main shell, and at least part of air flow driven by the fan assembly flows out of the main air outlet;

the battery pack is electrically connected with the fan assembly and used for providing electric energy for the operation of the fan assembly, an accommodating space is formed in the handle, and at least part of the battery pack is arranged in the accommodating space;

the battery heat dissipation frame is at least partially arranged on the handle and used for supporting the battery pack and forming a cooling air channel passing through the battery pack, and the fan assembly is provided with an air passing opening for supplying air to flow to the cooling air channel;

the cooling air duct is provided with an air inlet and an air outlet, the air inlet is communicated with the air passing opening, and under the condition that the fan assembly is operated, at least part of air flow flows out of the air passing opening, enters the cooling air duct through the air inlet, flows through the battery pack and flows out of the air outlet;

the cooling air duct comprises a first air duct and a second air duct which are basically parallel to each other, the battery pack is arranged in the first air duct, and the second air duct is located outside the battery pack and separated from the battery pack.

In one embodiment, the direction of airflow in the first air duct is opposite to the direction of airflow in the second air duct.

In one embodiment, the air outlet is located at one end of the handle connected with the main housing, and the air flow passes through the first air duct and traverses the battery pack, then turns back and continues to move in the opposite direction until reaching the air outlet to be discharged.

In one embodiment, the battery heat dissipation frame extends along a center line of the handle, and the air inlet is disposed at one end of the battery heat dissipation frame close to the fan assembly.

In one embodiment, the fan assembly comprises a motor and a motor cover covering the periphery of the motor, the motor cover further comprises an end wall facing the battery heat dissipation frame, and the air passing opening is formed in the edge of the end wall.

In one embodiment, the number of the air passing openings is multiple, and the air passing openings are arranged on the end wall of the motor cover at intervals.

In one embodiment, a ratio range of an area of the air passing opening to an area of the main air outlet is 1: 15-1: 5.

in one embodiment, the main air outlet is located on a side of the main housing away from the air inlet.

In one embodiment, the main housing is closed on a side opposite to the main air outlet, and the air inlet is close to the closed side.

In one embodiment, the battery cooling device further comprises a sealing structure, wherein the sealing structure is arranged between the battery cooling frame and the handle or the main shell and used for blocking the air flow flowing out from the air passing opening from flowing to a gap between the battery cooling frame and the handle.

In one embodiment, the sealing structure is configured as a sealing ring, and the sealing ring is located at the root of the connection between the handle and the main shell and is clamped between the battery heat dissipation frame and the end wall of the handle.

Compared with the prior art, the invention has the following beneficial effects:

the application provides a handheld dust catcher, the built-in handle of group battery, and adopt the cooling duct of battery cooling frame formation group battery in the handle, utilize fan assembly moving air current to dispel the heat to the group battery, improve the radiating effect of group battery, restrain the handle and grip regional temperature and rise, guarantee that long-time work grips not scalding one's hand.

[ description of the drawings ]

Fig. 1 is a perspective view of a hand-held cleaner provided herein.

FIG. 2 is an angled cross-sectional view of the hand-held cleaner shown in FIG. 1.

Fig. 3 is a schematic cross-sectional view of the hand-held cleaner shown in fig. 1 at another angle.

FIG. 4 is a front view of a motor cover of the blower assembly of the embodiment shown in FIG. 1.

Fig. 5 is a side view of the side of the motor cover shown in fig. 4 facing the handle.

Figure 6 is an enlarged partial cross-sectional view of the hand-held cleaner shown in figure 3 at the handle (arrows indicate airflow paths).

Fig. 7 is a front view of the battery heat sink of the hand held cleaner shown in fig. 2.

Fig. 8 is an angular cross-sectional view of the battery heat sink of fig. 7.

Fig. 9 is a sectional view schematically showing a structure at a handle of a hand-held cleaner according to another embodiment.

[ detailed description ] embodiments

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some of the structures related to the present application are shown in the drawings, not all of the structures. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms "comprising" and "having," as well as any variations thereof, in this application are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Referring to fig. 1, a handheld vacuum cleaner according to an embodiment of the present application includes a main housing 10, a handle 12, a suction pipe 11, a dust cup 14, a fan assembly 20, and a battery pack 9.

The handle 12 takes the form of an elongate handgrip arranged so that a user grips the handle to operate the hand-held cleaner, with a gripping region for gripping by the user. The handle 12 has a centerline along which the handle 12 extends, the centerline being defined by the shape of the handle 12 and may be straight or have a curvature. The handle 12 is connected to the main housing 10, and may be fixed or movable, such as rotatable or detachable. Of course, the handle 12 and the main housing 10 may be integrally formed. In this embodiment, referring to fig. 1, the handle 12 is a straight handle, and the center line of the handle 12 is a straight line and is fixedly connected to the rear of the main housing 10, that is, the handle 12 is positioned at the rear of the handheld cleaner, so that the main housing 10, the dust suction pipe 11 and the fan assembly 20 can be supported in front of a user, and the handheld cleaner is convenient to operate.

The hand-held cleaner also has a switch 13, which is configured here as an on and off switch, the switch 13 being disposed adjacent the handle 12, facilitating a user to operate the switch to turn the hand-held cleaner on or off while gripping the handle 12.

Fig. 2 is a vertical sectional view of the hand-held cleaner shown in fig. 1, taken through the center line of the handle 12, with reference to a state in which the center line of the handle 12 is substantially horizontal and the switch 13 is positioned right above. Referring to fig. 2, a fan assembly 20 is used to drive an air flow to generate a negative pressure. The suction pipe 11 has a suction inlet 110, and suction enters the dirt cup 14 of the hand-held cleaner through the suction inlet 110. The fan assembly 20 is disposed within the main housing 10 and includes a motor 23 and an impeller drivingly connected to the motor 23, and when the fan assembly 20 is operated, the motor 23 drives the impeller to rotate and generate a negative pressure under which suction is drawn into the dirt cup 14 through the dirt suction inlet 110.

Referring to fig. 3, the main housing 10 is provided with a main air outlet 100 for allowing the air flow driven by the fan assembly 20 to flow out. The main air outlet 100 is located at a side of the fan assembly 20, specifically, at a side of the motor 23. Referring to the cross-section of the hand-held cleaner shown in fig. 2, the main outlet 100 is located at the left and/or right side of the cross-section. Therefore, when a user holds the handle 12 to operate dust collection, the air discharged from the main air outlet 100 flows to the left and/or right of the body of the user to be blown out, the user cannot feel the blown air flow, and the use experience is good.

The battery pack 9 is used to power the fan assembly 20. The battery pack 9 includes a plurality of battery cells, and in order to reduce the weight of the handheld dust collector, the battery cells adopted in this embodiment are all lithium ion battery cells.

Referring to fig. 1, the handle 12 is a linear type handle, that is, the central line of the handle 12 is a straight line, the handle 12 is parallel to the axis of the fan assembly 20, and the handle 12, the main housing 10, the dirt cup 14 and the dust collection pipe 11 are sequentially arranged, specifically in a straight line, so that the handheld dust collector is slender and compact in size.

The hand-held cleaner further comprises a separation cone 40, the separation cone 40 being located at least partially within the dirt cup 14 for separating dirt from the airflow for temporary storage within the dirt cup 14. The separation cone 40 may be a multi-stage separation cone or a single-stage separation cone. The separated airflow flows out from the main air outlet 100.

In order to reduce the pollution of the outflow air to the external environment, the handheld vacuum cleaner further comprises an air inlet assembly 30 and an air outlet assembly 50 for filtering the airflow. Wherein, air inlet assembly 30 is located the low reaches of separation awl 40 on the air current flow direction, and fan assembly 20's upper reaches filters most dust in the air current through the filtering action of air inlet assembly 30, can reduce the dust volume that gets into fan assembly 20 through the air current after the separation of separation awl 40, reduces the pollution to fan assembly 20. Air-out subassembly 50 sets up in the circumference of motor for carry out further filtration to the air current and purify, make the external air of discharge satisfy the cleanliness factor requirement, avoid causing the pollution to external environment. Specifically, the air inlet assembly 30 is a filter sponge, and the air outlet assembly 50 is an air outlet HEPA.

The dust suction pipe 11 can be connected with a dust suction working head which is used for contacting the cleaning surface so that dust enters the dust suction pipe 11 along with the dust suction working head. The dust-collecting working heads can be of various types to adapt to different working surfaces, and one of the dust-collecting working heads is connected to the dust-collecting inlet 110. The dust suction pipe 11 can also be fixedly connected with the dust suction working head, or the dust suction pipe 11 is directly constructed into a structure which is contacted with the cleaning surface for dust suction.

In order to ensure the portability of the handheld dust collector, the battery pack 9 is at least partially arranged in the handle 12, and the existing internal space of the handle 12 is used for accommodating the motor, so that the overall volume of the handheld dust collector can be reduced, and the handheld dust collector is smaller. Specifically, the handle 12 has an accommodating space therein, and at least a part of the battery pack 9 is disposed in the accommodating space.

In order to ensure the dust collection capacity of the handheld dust collector, the embodiment of the application adopts large current to work. When the hand-held cleaner is in a dust collection working state, the current output by the battery pack 9 is more than or equal to 5A. The working current higher than 5A is adopted, so that strong energy supply is provided for the handheld dust collector, larger suction force is generated, and the dust collection effect is better. In one embodiment, the current output by the battery pack 9 is in a range of 10A-30A, and the dust suction capacity is better.

The battery pack is discharged continuously to cause heat accumulation and untimely dissipation, which can reduce the service life of the battery pack 9, and if excessive heat is conducted to the handle 12, the handle 12 is easily overheated, and the holding is hot. Referring to the condition of the hand-held cleaner shown in figure 2, figure 3 shows a cross-sectional view of the hand-held cleaner in a generally horizontal plane passing through the centre line of the handle 12. In this embodiment, the hand-held cleaner is further provided with a battery heat sink 16 extending into the handle 12 for supporting the battery pack 9 and forming a cooling air duct 160 through the battery pack 9. The fan assembly 20 is provided with an air passing opening 210 for supplying air to the cooling air duct 160, the cooling air duct 160 is provided with an air inlet 163 and an air outlet 165, the air inlet 163 is communicated with the air passing opening 210, and under the condition that the fan assembly 20 is in operation, air flows out of the air passing opening 210, enters the cooling air duct 160 through the air inlet 163, flows through the battery pack 9 and flows out of the air outlet 165. Specifically, the battery heat dissipation frame 16 extends along the center line of the handle 12, so that the battery pack 9 dissipates heat by using the airflow of the fan assembly 20 during operation, and the heat dissipation effect is improved. Firstly, the good heat dissipation effect can prolong the service life of the battery pack 9 under the same condition; secondly, the good heat dissipation effect can ensure that the battery pack 9 works with large capacity and large current, and the continuous working time and the power of the handheld dust collector are improved; thirdly, the influence of the heating of the battery pack 9 on the handle holding area can be reduced, the temperature rise of the holding area can be restrained, the handle is guaranteed not to be scalded under the condition that the large current works for a long time, and the operation experience of a user is improved.

Specifically, the battery heat sink 16 extends generally along a centerline of the handle 12. The battery heat sink has an end adjacent to the fan assembly 20, the air inlet 163 is located at an end of the battery heat sink 16 adjacent to the fan assembly 20, and the air inlet 210 is located at an end of the fan assembly 20 adjacent to the battery heat sink, so as to facilitate the air flow of the fan assembly 20 into the cooling air duct 160.

The cooling air duct 160 is formed in the battery heat dissipation frame 16, the air inlet 163 and the air outlet 165 are both opened on the battery heat dissipation frame 16, and the battery pack 9 is disposed in the cooling air duct 160, so that the air flow flows through the entire battery pack 9, and the heat dissipation efficiency of the battery pack is ensured.

Referring to fig. 4 and 5, the fan assembly 20 includes a motor 23 and a motor cover 21 covering the periphery of the motor 23, the motor cover 21 includes a side wall 215 surrounding the circumference of the motor 23, and an end wall 217 facing the battery heat dissipation frame 16, and the air passing opening 210 is opened at the edge of the end wall 217. The side wall 215 is recessed inward, a cavity 212 is formed between the side wall 215 and the inner wall of the main housing 10, the cavity 212 is substantially annular, the side wall 215 is provided with an air hole 213 for air flow circulation, the main air outlet 100 is formed on the wall surface of the main housing 10 forming the cavity 212, most of the air flow driven by the fan assembly 20 is accumulated in the cavity 212 and flows out from the main air outlet 100, and a part of the air flow passes through the air passing hole 210 on the end wall 217 and flows to the cooling air duct 160, so that the heat of the battery pack in the cooling air duct 160 is dissipated.

In one embodiment, the number of the air vents 210 is multiple, and the multiple air vents 210 are arranged at intervals on the edge of the end wall 217. The number of the air inlets 210 may be 3 or 5.

In order to guarantee the heat dissipation effect of the air flow flowing to the battery pack. In an embodiment, the ratio of the area of the air passing opening 210 to the area of the main air outlet 100 ranges from 1: 15-1: 5. therefore, the flow of the air flow flowing to the battery pack can be guaranteed, and the cooling effect of the battery pack is ensured. Preferably, the ratio is 1: 10.

as described in the above embodiment, referring to the cross section of the handheld vacuum cleaner shown in fig. 2, the main air outlet 100 is located at the left side and/or the right side of the cross section. In order to increase the concentration of the airflow flowing to the cooling air duct 160, in an embodiment, the main air outlet 100 is only opened on one side of the main housing 10, specifically, the main air outlet 100 is opened on the left side or the right side of the cross section shown in fig. 2, and the air inlet 163 is located on the opposite side of the main air outlet 100, so as to output air from one side, thereby reducing the influence of the main air outlet 100 on the airflow flow rate of the air inlet 163, and facilitating the airflow to flow to the battery pack. In other words, the side of the main housing 10 opposite to the main outlet 100 is closed, and the air inlet 163 is close to the closed side, so that the air flow is more concentrated into the air inlet 163.

Referring to fig. 6 and 8, the air outlet 165 is located at the end of the handle 12 connected to the main housing 10, i.e. the air outlet 165 is located at the root of the handle 12 connected to the main housing 10, outside the grip area. Specifically, the cooling air duct 160 includes a first air duct 161 and a second air duct 162 that are substantially parallel to each other, the battery pack 9 is disposed in the first air duct 161, and the second air duct 162 is located outside the battery pack 9 and is spaced apart from the battery pack 9. The second air duct 162 passes through the free end of the handle 12 and is communicated with the first air duct 161, after flowing out from the air passing opening 210, the air flow enters the cooling air duct 160 through the air inlet 163, the first air duct 161 extends lengthwise along the center line of the handle 12, the air flow flows to the free end of the handle in the first air duct 161, turns back to flow to the second air duct 162, and flows to the root of the handle 12 in the second air duct 162 along a parallel path. That is, the air flows in the first air duct 161 and the second air duct 162 are in opposite directions. The air outlet 165 is located at the end of the second air duct 162, that is, the air outlet 165 is located at the end of the handle 12 connected to the main housing 10, and after passing through the battery pack 9, the air flow turns back to flow into the second air duct 162 and continues to move in the opposite direction until reaching the air outlet 165 to be discharged outside. Air outlet 165 is to left side or right side air-out, and the air current that flows from air outlet 165 can not be used in the user palm, under the prerequisite that promotes the radiating effect, and the guarantee operation is experienced.

Referring to fig. 7 and 8, the battery heat dissipation frame 16 further includes a fixing portion 169, the fixing portion 169 is located at one end of the battery heat dissipation frame 16 and located outside the handle 12 for positioning the battery heat dissipation frame 16. The main housing 10 has a positioning member (not shown) therein, and the fixing portion 169 is fixedly connected to the positioning member.

Because the battery heat dissipation frame 16 partially extends into the handle 12, an assembly gap is inevitably formed between the battery heat dissipation frame 16 and the handle 12, and the airflow in the cooling air duct 16 is prevented from flowing into the assembly gap and being dispersed. In an embodiment, the handheld vacuum cleaner further includes a sealing structure 17, the sealing structure 17 is disposed between the battery heat dissipation frame 16 and the handle 12, and is configured to block the air flowing out from the air passing opening 210 from flowing to a gap between the battery heat dissipation frame 16 and the handle 12, so that the amount of air flowing into the cooling air duct 160 is reduced, and the heat dissipation effect is reduced. Specifically, the sealing structure 17 is a sealing ring, and referring to fig. 7, the battery heat sink 16 further includes a sealing portion 167, the sealing portion 167 is substantially annular and is adapted to the shape of the sealing ring, the sealing portion 167 faces the end wall of the handle 12, and the sealing structure 17 is interposed between the sealing portion 167 and the end wall of the handle 12. Here, the end wall of the handle 12 refers to a bent portion of the handle 12 connected to the main housing 10. In another embodiment, the sealing structure 17 may be disposed between the battery heat sink and the inner wall of the main housing 10 as long as it can prevent the air flow from flowing to the gap between the battery heat sink 16 and the handle 12.

In order to ensure the air flow rate of the cooling air duct 16, in an embodiment, referring to fig. 9, the air outlet 165' is provided at the free end of the handle, and the air flow enters from one end of the cooling air duct 160 and directly flows out from the opposite end, i.e. the air outlet path described in the above embodiment is not provided, so that the length of the air flow path is reduced, the air outlet efficiency of the cooling air duct 160 is improved, and the heat dissipation effect is improved. Preferably, the opening of the air outlet 165 faces to the left or right, so as to prevent air from flowing to other directions and acting on the user.

In this embodiment, the battery pack 9 includes a plurality of battery cells, specifically, 6 battery cells are taken as an example for illustration, please refer to fig. 2 and fig. 3, along the central line direction of the handle 12, the 6 battery cells are arranged in two rows, each row has 3 battery cells connected to each other at the head, the two rows of battery cells are arranged in parallel, each battery cell is substantially parallel to the central line direction of the handle 12, the battery pack 9 formed by the two rows of battery cells is substantially a rectangular parallelepiped, the height of the battery pack is the diameter of two battery cells, the width of the battery pack is the diameter of one battery cell, and the length of the battery pack is. So set up, be favorable to the temperature of group battery 9 to scatter and disappear, can be littleer to the diameter of handle 12 moreover, accord with the comfortable requirement that the staff gripped, can not too thick lead to gripping uncomfortable.

The above is only one embodiment of the present invention, and any other modifications based on the concept of the present invention are considered as the protection scope of the present invention.

Claims

1. A hand-held cleaner, comprising:

a main housing (10);

a handle (12) attached to the main housing (10) or integrally formed with the main housing (10), the handle (12) having a gripping area for a user to grip;

a fan assembly (20) for driving an air flow to generate a negative pressure, the fan assembly (20) being disposed within the main housing (10);

the main air outlet (100) is arranged on the main shell (10), and at least part of air flow driven by the fan assembly (20) flows out of the main air outlet (100);

the battery pack (9) is electrically connected with the fan assembly (20) and used for providing electric energy for the operation of the fan assembly (20), an accommodating space is formed in the handle (12), and at least part of the battery pack is arranged in the accommodating space;

the battery heat dissipation frame (16) is at least partially arranged on the handle (12) and used for supporting the battery pack and forming a cooling air duct (160) passing through the battery pack (9), and the fan assembly (20) is provided with an air passing opening (210) for supplying air to flow to the cooling air duct (160);

the cooling air duct (160) is provided with an air inlet (163) and an air outlet (165), the air inlet (163) is communicated with the air passing opening (210), and under the condition that the fan assembly (20) is operated, at least part of air flow flows out of the air passing opening (210), enters the cooling air duct (160) through the air inlet (163), flows through the battery pack (60) and flows out of the air outlet (165);

the cooling air duct (160) comprises a first air duct (161) and a second air duct (162) which are substantially parallel to each other, the battery pack (9) is arranged in the first air duct (161), and the second air duct (162) is located outside the battery pack (9) and is separated from the battery pack (9).

2. The hand-held cleaner of claim 1, wherein the airflow within the first air duct (161) flows in a direction opposite to the direction of flow within the second air duct (162).

3. The hand-held cleaner according to claim 2, wherein the air outlet (165) is located at one end of the handle (12) connected with the main housing (10), and the air flow passes through the first air duct (161) and traverses the battery pack (9), then turns back and continues to move in the opposite direction until reaching the air outlet (165) to be discharged.

4. The hand-held cleaner of claim 1, wherein the battery heat sink (16) extends along a centerline of the handle (12), and the air inlet (163) is disposed at an end of the battery heat sink (16) proximate to the fan assembly (20).

5. The hand-held cleaner according to claim 1, wherein the fan assembly (20) comprises a motor (23) and a motor cover (21) covering the periphery of the motor, the motor cover (21) further comprises an end wall (217) facing the battery heat dissipation frame (16), and the air passing opening (210) is arranged at the edge of the end wall (217).

6. The hand-held vacuum cleaner as claimed in claim 5, characterized in that the number of the air passing openings (210) is plural, and the plural air passing openings are arranged at intervals on the end wall (217) of the motor cover (21).

7. The hand-held cleaner according to claim 1, wherein the ratio of the area of the air-passing opening (210) to the area of the main air outlet opening (100) ranges from 1: 15-1: 5.

8. the hand-held cleaner according to claim 1, wherein the main air outlet opening (100) is located on a side of the main housing (10) remote from the air inlet opening (163).

9. The hand-held cleaner according to claim 8, wherein the main housing (10) is closed on a side opposite the main air outlet opening (100), the air inlet opening (163) being adjacent to the closed side.

10. The hand-held cleaner according to claim 1, further comprising a sealing structure (17), wherein the sealing structure (17) is disposed between the battery heat dissipation frame (16) and the handle (12) or the main housing (10) for blocking the air flow flowing out from the air flow opening (210) from flowing to a gap between the battery heat dissipation frame (16) and the handle (12).

11. The hand-held cleaner according to claim 10, wherein the sealing structure (17) is configured as a sealing ring, which is located at the root of the connection of the handle (12) to the main housing (10), and is sandwiched between the battery heat sink (16) and the end wall of the handle (12).