CN214804417U

CN214804417U - Hand-held vacuum cleaner

Info

Publication number: CN214804417U
Application number: CN202023030422.3U
Authority: CN
Inventors: 杨勇
Original assignee: Shenzhen 3irobotix Co Ltd
Current assignee: Shenzhen 3irobotix Co Ltd
Priority date: 2020-12-16
Filing date: 2020-12-16
Publication date: 2021-11-23
Anticipated expiration: 2030-12-16

Abstract

A hand-held vacuum cleaner comprising: a main housing; a dust-gas separation unit for separating the air flow, the dust-gas separation unit comprising an air inlet, a separation chamber and a base surface; the air inlet pipeline is communicated with the separation cavity; a fan assembly for driving an air flow to generate a negative pressure; the battery pack is electrically connected with the fan assembly and used for providing electric energy for the operation of the fan assembly; a handle having a gripping area for gripping by a user, the handle extending along an axis parallel to an axis of the battery pack, at least a portion of the wall surface and the base surface of the battery pack cooperatively supporting the hand-held cleaner. The application provides a handheld dust catcher structural support is stable, is convenient for deposit.

Description

Hand-held vacuum cleaner

[ technical field ] A method for producing a semiconductor device

The utility model relates to a clean technical field especially relates to a handheld dust catcher.

[ background of the invention ]

The dust catcher is a common household cleaning appliance at present, and the dust catcher commonly used can roughly be divided into horizontal type, vertical type, hand-held type etc. according to the structural configuration difference, wherein, horizontal type dust catcher includes parts such as body, vacuum blower, connecting pipe, scrubbing brush, and vacuum blower installs inside the body, and vacuum blower passes through the hose to be connected with the scrubbing brush, operates the scrubbing brush during use and carries out the dust absorption to drag the body through the connecting pipe and remove. The horizontal dust collector is generally large in size, and the body needs to be frequently dragged when the horizontal dust collector is used, so that the operation is not very convenient. The floor brush and the vacuum fan of the vertical dust collector adopt an integrated structure, the dust collection operation can be completed by pushing the vertical dust collector body during use, the vertical dust collector is very suitable for cleaning the ground, but when walls, furniture surfaces, table tops and the like need to be cleaned, the whole dust collector needs to be lifted, and the vertical dust collector is inconvenient to use.

The handheld dust collector is designed for portability, has small volume and light weight, is convenient for a user to operate, and has wider application range. The existing handheld dust collector comprises a battery, a motor, a handle, a cup body and other parts, and when the handheld dust collector is designed, the relative position of the parts has obvious influence on the overall performance of the handheld dust collector, so that the use experience of a user also has obvious influence. The existing handheld dust collector usually adopts a built-in battery, the battery and the machine body are integrally arranged, the battery cannot be replaced, the battery is not beneficial to heat dissipation, and when the battery fails, a user can hardly replace the battery. The relative position arrangement of the motor and the cup body has obvious influence on the dust collection effect of the handheld dust collector, and the design and the manufacture of the handheld dust collector need to be considered simultaneously.

Current handheld dust catcher, in non-user state, handheld dust catcher is kept flat on the desktop usually, and handle and cup are in the state of erectting, and the motor is located the top of cup usually, and it utilizes the bottom surface of battery package and the bottom surface of cup to support jointly, and whole handheld dust catcher occupies higher space, emptys easily.

[ Utility model ] content

The utility model aims at providing a hand-held type dust catcher, its appearance is succinct, structural layout is reasonable, grips conveniently, operates conveniently.

The utility model aims at realizing through the following technical scheme:

a hand-held vacuum cleaner comprising:

a main housing;

a dust-gas separation unit for separating the gas flow, the dust-gas separation unit comprising a gas inlet, a separation chamber and a base surface;

the air inlet pipeline is communicated with the separation cavity;

a fan assembly for driving an air flow to generate a negative pressure;

the battery pack is electrically connected with the fan assembly and is used for providing electric energy for the operation of the fan assembly;

a handle having a gripping area for gripping by a user, the handle extending along an axis parallel to an axis of the battery pack, at least a portion of the wall surface of the battery pack and the base surface together supporting a hand-held vacuum cleaner.

In one embodiment, the dust and air separation unit has a first axis, the base surface is parallel to the first axis, and the handle has an axis of extension parallel to the first axis.

In one embodiment, at least a portion of the air inlet duct is located below the first axis, and at least a portion of the air inlet duct has an axis of extension that passes through the battery pack.

In one embodiment, the air inlet duct includes a first air duct and a second air duct, an axis of the first air duct passes through the dust-air separation unit, and an axis of the second air duct passes through the battery pack.

In one embodiment, the second air duct and the battery pack are located on the same side of the handle and are arranged side by side.

In one embodiment, the dust-air separation unit, the fan assembly and the handle are arranged in a straight line.

In one embodiment, the battery pack has an axis of extension passing through the handle.

In one embodiment, the center of gravity of the handheld dust collector is located in front of the center line of the battery pack in the vertical direction.

In one embodiment, the battery pack is detachably mounted on the body of the handheld dust collector, and the removal direction of the battery pack is parallel to the extending axis of the handle.

In one embodiment, the dust-gas separation unit is detachably connected with the main housing and has a matching wall, the battery pack is located on one side of the plane of the matching wall, and the projection of the fan assembly and the battery pack in the extending direction of the matching wall at least partially overlaps.

Compared with the prior art, the utility model discloses following beneficial effect has: in the handheld dust collector, at least part of the wall surface of the battery pack and the surface of the base part of the dust-air separation unit support the handheld dust collector together, so that the handheld dust collector is stably supported and is convenient to store; and the extension axis of the handle is parallel to the axis of the battery pack, so that the whole machine is low in height and convenient to extend into a narrow area for dust collection.

[ description of the drawings ]

Fig. 1 is a perspective view of a hand-held cleaner according to an embodiment of the present disclosure.

Figure 2 is a front view of the hand-held cleaner shown in figure 1.

Figure 3 is a cross-sectional view of the hand-held cleaner shown in figure 1.

[ 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 to 3, a handheld vacuum cleaner according to an embodiment of the present disclosure includes a main housing 10, a dust-air separating unit 30 for separating air flow, a fan assembly 20 for driving the air flow to generate negative pressure, a handle 12 for holding, and a battery pack 50 electrically connected to the fan assembly 20, wherein the battery pack 50 is used for providing power for operating the fan assembly 20.

A dust and air separating unit 30 is mounted on the main housing 10, and the dust and air separating unit 30 includes a dust cup 32, a filter 34 located in the dust cup 32, a separating chamber (not shown) for separating dust and air, and a dust collecting chamber 320 for collecting dust. Wherein a separation chamber is formed within the filter 34, and a dirt collection chamber 320 is defined by the dirt cup 32 and the outer surface of the filter 34, wherein the airflow entraining the dirt is subjected to a separation of dirt and air, and wherein the separated dirt is temporarily stored within the dirt collection chamber 320. To facilitate the dumping of dirt, the dirt cup 32 is removably attached to the main housing 10. In one embodiment, the dust cup 32 and the main housing 10 can also be fixedly connected, but an openable and closable door member is provided on the dust cup 32, so that when dust needs to be poured, the dust can be poured out from the opening of the dust cup 32 by opening the door member.

In one embodiment of the present invention, the separation chamber and the dirt collection chamber 320 are both located within the dirt cup 32, together forming an interior chamber of the dirt cup 32. Referring to fig. 2, the dust and gas separation unit 30 defines a first axis L1. In one embodiment, the first axis L1 is parallel to or collinear with the axis of the filter 34.

For convenience of explanation, referring to the state of the hand-held cleaner shown in fig. 2, it is defined that the upper side of the drawing of fig. 2 is the upper side, the lower side is the lower side, one side (right side of the drawing) of the handle 12 is the rear part of the hand-held cleaner, and the other end (the end where the air inlet 160 is provided as shown in fig. 3) opposite to the handle 12 is the front part of the hand-held cleaner. The above definitions are for illustrative purposes only and are not to be construed as limiting the scope of the present application.

The handle 12 has an axis of extension along which the handle 12 extends, the axis of extension being determined by the shape of the handle, and may be straight or have a curvature. The handle has a gripping area for grasping by a user. In one embodiment, referring to FIG. 2, the handle 12 is in the form of an elongated handle that is a linear handle defining a second axis L2. The extension axis of the handle 12 (i.e., the second axis L2) and the first axis L1 are parallel to each other. Further, the first axis L1 is substantially collinear with the second axis L2, i.e., the handle 12 extends in the direction of the first axis L1.

One end of the handle 12 is connected to the main housing 10 of the hand-held cleaner, and may be fixedly connected or movably connected, such as rotatably connected or detachably connected, and the other end of the handle 12 is a free end. When the main housing 10 of the hand-held cleaner comprises a combination of different parts, such as a fan assembly 20 having a separate fan housing, the main housing also comprises the fan housing, and the handle 12 can be connected to the fan housing in the main housing.

In the embodiment shown in fig. 1-3, the handle 12 is attached to the main housing 10. the handle 12 may also be integrally formed with the main housing 10, with the fan assembly 20 disposed within the main housing 10. In this embodiment, referring to fig. 1, the handle is a straight handle, and is fixedly connected to the rear of the main housing 10, that is, the handle 12 is positioned at the rear of the hand-held cleaner, the handle 12 extends rearward beyond the battery pack 50, and the end of the battery pack 50 is positioned in front of the end of the handle 12, so that the main housing 10, the dust-air separating unit 30 and the fan assembly 20 can be supported in front of a user, thereby facilitating the operation of the hand-held cleaner.

For the linear handle 12, the extension axis of the handle is the second axis L2, the dust-air separation unit 30, the fan assembly 20, the handle 12 is arranged in a straight line, and particularly, the handle is arranged along the second axis L2 in sequence, so that the handheld vacuum cleaner is slender and small in size and portable.

In this embodiment, the battery pack 50 is positioned below the handle 12, the user grips the handle 12, the battery pack 50 with a larger weight is positioned below the handle 12, and the palm of the hand to grip needs only to apply an upward lifting force, which is labor-saving. Specifically, at least a portion of the battery pack 50 is located directly below the handle 12. Since the dust and air separating assembly 30 is located in front of the handle 12, the weight of the dust and air separating assembly 30 makes the front of the hand-held cleaner naturally droop in the case of grasping the handle 12 of the hand-held cleaner, thereby facilitating cleaning of lower surfaces such as floors.

In this embodiment, the battery pack 50 is detachably provided. Specifically, the battery pack 50 is detachably attached to the body of the hand-held cleaner in a direction substantially parallel to the direction in which the free end of the handle 12 extends, i.e., the battery pack is attached to or detached from the detachable hand-held cleaner in a direction parallel to the second axis L2. The direction of removal of the battery pack 50 is parallel to the second axis L2 such that the direction of the force on the body of the hand-held cleaner when the battery pack 50 is removed is parallel to the direction of the second axis L2 of the handle 12. When the user mounts or removes the battery pack 50, the user holds the handle 12 with one hand for keeping the state of holding the cleaner, and holds the battery pack 50 with the other hand to pull/insert it in a direction parallel to the second axis L2 of the handle 12, the hand holding the handle 12 only needs to apply a torque substantially the same as the pulling/inserting direction, and the operation of removing and mounting the battery pack is labor-saving. Wherein the body, understood as the body of the hand-held cleaner, removes a main portion of the battery pack 50. In this embodiment, the battery pack 50 is attached to the main housing 10, and in another embodiment, the battery pack may also be attached to the fan housing of the fan assembly 20. In another embodiment, the battery pack 50 is non-detachably disposed, the main housing 10 has a receiving cavity for receiving the battery, and the battery pack 50 is received in the receiving cavity of the main housing 10.

In one embodiment, the battery pack 50 is substantially rectangular parallelepiped in shape, and a center line defined parallel to a longitudinal direction of the battery pack 50 is an axis of the battery pack 50. As shown in fig. 2, the axis of the battery pack 50 is a third axis M, the handle 12 and the battery pack 50 are distributed in a direction perpendicular to the first axis L1, and the axis of the handle 12 and the axis of the battery pack 50 are parallel to each other, i.e., the second axis L2 and the third axis M are parallel to each other. Since the first axis L1 is parallel to the second axis L2, that is, the first axis L1, the second axis L2 and the third axis M are parallel to each other, the battery pack 50 and the handle 12 are arranged along a direction perpendicular to the first axis L1/the second axis L2, so that when the handheld cleaner is lifted by the handle 12 (without applying a yawing moment), the battery pack 50 is located just below the handle 12, and the handheld cleaner is more comfortable and labor-saving to hold.

The axis of rotation of the fan assembly 20 is defined as a fourth axis (not shown). In one embodiment, the first axis L1, the second axis L2, the third axis M and the fourth axis are parallel to each other. So, whole handheld dust catcher's major structure part all arranges along the axis that is parallel to each other for overall structure is compact and exquisite more, is applicable to narrow scene dust absorption, flexible operation. Further, the first axis L1, the second axis L2, and the fourth axis are substantially collinear, and the second axis L2 is parallel to the third axis M. The battery pack 50 is arranged in series spaced apart from the dust and gas separation unit 30 in the extending direction of the first axis L1.

Since the handheld cleaner has a substantially elongated rod shape extending in a direction parallel to the first axis L1/the second axis L2, the volume of the handheld cleaner is further reduced in order to reduce the radial dimension of the handheld cleaner. The fan assembly 20 at least partially overlaps the battery pack 50 in a projection in a direction perpendicular to the second axis L2, or the fan assembly 20 at least partially overlaps the battery pack 50 in a projection in a direction perpendicular to the first axis L1. That is, the fan assembly 20 and the battery pack 50 have a cross-overlapping portion in the axial direction. Therefore, the gravity center layout of the handheld dust collector can be more centralized, the length of the handheld dust collector is reduced, the size of the handheld dust collector is small, and the gravity center layout accords with a man-machine.

In one embodiment, the filter 34 includes at least a cyclonic separation cone located at least partially within the dirt cup 32 for separating dirt from the airflow for temporary storage within the dirt cup 32. The cyclone separation cone can be a multi-stage separation cone or a single-stage separation cone. An air outlet 110 is formed in the main housing 10, and the airflow separated by the cyclone separation cone reaches the fan assembly 20 and then flows out of the air outlet 110.

The hand-held cleaner also has a switch (not shown), here configured as an on and off switch, disposed adjacent the handle 12, for facilitating a user to operate the switch to turn the hand-held cleaner on or off while gripping the handle 12.

The hand-held cleaner includes an air inlet duct 16, the air inlet duct 16 communicating with the separating chamber and the dirt-collecting chamber 320. Further, at least a portion of the air inlet duct 16 is located to one side of the first axis L1. At least part of the air inlet duct 16 is located on the battery pack 50 in parallel projection in the direction of the first axis L1. The air inlet duct 16 includes an air inlet 160 at an end thereof through which suction material enters the dirt cup 32 of the hand-held cleaner. Referring to fig. 3, the air inlet duct 16 is located outside the dust-air separating unit 30 and communicates with the dust-air separating unit 30, the air inlet 160 and the dust-air separating unit 30 are arranged along a first axis L1, and the axis of the air inlet 160 is substantially collinear with the first axis L1. Specifically, the axis of extension of the air inlet duct 16, which is located below the first axis L1, passes through the battery pack 50. The handle 12 is coupled to the main housing 10 at a front end thereof and extends in a direction opposite to the air inlet 160 at a rear end thereof.

As shown in fig. 3, the air inlet duct 16 has a two-stage structure, and the air inlet duct 16 includes a first duct 161 and a second duct 162, wherein an axis of the first duct 161 passes through the dust-gas separation unit 30, and an axis of the second duct 162 passes through the battery pack 50. Specifically, the first duct 161 defines an air inlet direction, which is an axial direction of the first duct 161, and the first axis L1 of the dust-gas separation unit 30 is parallel to the first axis. The air inlet 160 is formed at one end of a first duct 161, the first duct 161 being located in front of the dust-gas separation unit 30, and a second duct 162 being located below the dust-gas separation unit 30, i.e., below the first axis L1.

In one embodiment, the air inlet duct 16 and the dust and gas separating unit 30 are two separate components, and the air inlet duct 16 communicates with the dust and gas separating unit 30. In another embodiment, the air inlet duct 16 is part of the dust and air separation unit 30, and the dirt cup 32 is removed along with the air inlet duct 16. Specifically, the air inlet duct 16 is fixedly connected to or integrally formed with the dust cup 32, and when dust needs to be poured, the dust cup 32 and the air inlet duct 16 are detached from the main housing 10 as a whole, and then the dust is poured and installed back as a whole. The air inlet pipe 16 and the dust cup 32 are disassembled together, so that the connecting structure is reduced, and the handheld cleaning machine has simpler structure and more compact volume.

To facilitate support of the hand-held cleaner, the dust and air separation unit 30 further comprises a base surface, and at least part of the wall surface of the battery pack 50 and the base surface together support the hand-held cleaner. In this embodiment, the second duct 162 may be disposed above the first axis L1 and below the first axis L1, and the base surface is at least a portion of the bottom surface of the air inlet duct 16 when the second duct 162 is disposed below the first axis L1. I.e., at least a portion of the bottom surface of the air inlet duct 16 is coplanar with at least a portion of the bottom surface of the battery pack 50, thereby collectively supporting the hand-held cleaner. In another embodiment, the second conduit 162 is flush with or above the first axis L1, and the base surface is formed on a lower surface of the dirt cup 32, the lower surface of the dirt cup 32 being coplanar with a portion of the bottom surface of the battery pack 50, thereby collectively supporting the hand-held cleaner. The support for supporting the hand-held cleaner may be a surface support formed by the base surface and the lower surface of the battery pack 50, or may be a line contact formed by one of the support contacts, which is called a support line, and the other support line is formed by the support surface, or may be a support line formed by both support lines. Preferably, the base surface is parallel to the first axis L1.

The dust-air separating unit 30 is detachably connected to the main housing 10 and has a fitting wall, the battery pack 50 is located on one side of a plane of the fitting wall, a partition wall is provided between the dust collecting chamber 320 and at least a portion of the air inlet duct 16, and the handle 12 and the battery pack 50 are located on two sides of the partition wall, respectively. In one embodiment, the mating wall extends in a vertical direction, i.e., up and down in FIG. 2; the partition wall extends in the lateral direction, i.e., the front-rear direction in fig. 2. The fan assembly 20 at least partially overlaps the projection of the battery pack 50 in the direction of extension of the mating wall.

The battery 50 has a large mass with its center of gravity located approximately at its geometric center. As shown in fig. 2, the center of gravity of the handheld vacuum cleaner is substantially located on the center line parallel to the vertical direction, and in order to achieve better use effect and improve the holding experience, the center of gravity of the handheld vacuum cleaner is located in front of the center line of the battery pack 50 in the vertical direction. The center line of the battery pack 50 in the up-down direction passes through the handle 12.

Further, the battery pack 50 extends in a direction parallel to the first axis L1 and has a free end that is adjacent the rear of the hand held cleaner. Similarly, the handle 12 has a first end connected to the main housing 10 or the fan assembly 20 and a free end opposite the first end, the free end and the air inlet 160 being located at opposite ends of the hand-held cleaner. The free end of the battery pack 50 is closer to the air inlet 160 than the free end of the handle 12. That is, the handle 12 has a free end extending rearward in a direction parallel to the first axis L1, and the free end of the battery pack 50 is closer to the air inlet opening 160 than the free end of the handle 12. That is, the free end of the handle 12 is closer to the rear of the hand-held cleaner than the free end of the battery pack 50. Further, the free end of the battery pack 50 is closer to the air intake duct 16 than the free end of the handle 12. That is, the farthest position at which the handle 12 extends rearward is larger than the farthest position at which the battery pack 50 extends rearward, and a projection of the handle 12 in a direction perpendicular to the axis of the battery pack 50 at least partially protrudes from the battery pack 50. Therefore, a user can conveniently grip the tail of the handheld dust collector, and the weight part and the like are supported in front of the handle 12, so that dust collection operation is facilitated.

The hand-held cleaner may further include a dust suction pipe (not shown) having one end connected to the air inlet 160 and the other end connected to a dust suction working head (not shown) for contacting a cleaning surface to allow dust to enter the dust suction pipe along with the dust suction working head. The dust-absorbing working heads can be in various forms to adapt to different working surfaces, and one of the dust-absorbing working heads is directly connected to the air inlet or indirectly connected to the air inlet through an intermediate connecting piece such as a dust-absorbing pipe. The dust suction pipe can also be fixedly connected with the dust suction working head, or the dust suction pipe is directly constructed into a structure which is contacted with the cleaning surface for dust suction.

In one embodiment, a fan assembly 20 is disposed within the main housing 10, the fan assembly 20 being used to drive an air flow to create a negative pressure. The fan assembly 20 includes a motor and an impeller drivingly connected to the motor, and when the fan assembly 20 is in operation, the motor drives the impeller to rotate and generate a negative pressure under which suction is drawn into the dirt cup 32 through the air inlet.

In order to reduce the pollution of the outflow air to the external environment, the handheld dust collector further comprises an air inlet assembly and an air outlet assembly which are used for filtering the airflow. Wherein, the air inlet subassembly is located the low reaches of filter 34 in the air current flow direction, and fan subassembly 20's upper reaches, the filtering action of the air current through filter 34 after the separation through the air inlet subassembly filters most dust in the air current, can reduce the dust volume that gets into fan subassembly 20, reduces the pollution to fan subassembly 20. The air-out subassembly 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 is a filter sponge, and the air outlet assembly is an air outlet HEPA.

The projection in a certain direction in the present application is understood to be a positional relationship of a planar light parallel to the direction, which is projected on a plane perpendicular to the direction by orthographic projection.

The above is only a specific embodiment of the present invention, and other improvements made on the premise of the inventive concept are all considered as the protection scope of the present invention.

Claims

1. A hand-held cleaner, comprising:

a main housing;

the air inlet pipeline is communicated with the separation cavity;

a fan assembly for driving an air flow to generate a negative pressure;

a handle having a gripping area for gripping by a user, the handle extending along an axis parallel to an axis of the battery pack, at least a portion of the wall surface of the battery pack and the base surface together supporting the hand-held cleaner.

2. The hand-held cleaner of claim 1, wherein the dirt-air separation unit has a first axis, the base surface being parallel to the first axis, the handle extending axis being parallel to the first axis.

3. The hand-held cleaner of claim 2, wherein at least a portion of said air inlet duct is located below said first axis, and at least a portion of an axis of extension of said air inlet duct passes through said battery pack.

4. The hand-held cleaner of claim 1, wherein the air inlet duct comprises a first air duct and a second air duct, an axis of the first air duct passes through the dust-air separation unit, and an axis of the second air duct passes through the battery pack.

5. The hand-held cleaner of claim 4, wherein the second air duct is located on the same side of the handle as the battery pack and is arranged side-by-side.

6. The hand-held cleaner of claim 1, wherein the dirt-air separation unit, the fan assembly, and the handle are arranged in a straight configuration.

7. The hand-held cleaner of claim 1, wherein an axis of extension of the battery pack passes through the handle.

8. The hand-held cleaner according to claim 7, wherein a center of gravity of the hand-held cleaner is located forward of a center line of the battery pack in an up-down direction.

9. The hand-held cleaner of claim 1, wherein the battery pack is detachably mounted to a body of the hand-held cleaner, and a detaching direction of the battery pack is parallel to an extending axis of the handle.

10. The handheld vacuum cleaner of claim 1, wherein the dust-air separation unit is detachably connected to the main housing and has a mating wall, the battery pack is located on one side of a plane of the mating wall, and a projection of the fan assembly and the battery pack in an extending direction of the mating wall at least partially overlaps.