CN220229464U - Multifunctional air purifier with limiting function - Google Patents

Abstract

The application relates to the technical field of air purification, and provides a multifunctional air purifier with limiting function, and the multifunctional air purifier comprises: an outer housing; the inner shell is arranged in the outer shell and is in sliding connection with the inner wall of the outer shell; the air inlet base is arranged in the outer shell and communicated with the inner shell and is used for allowing air to enter the inner shell; the lifting assembly is at least partially arranged in the inner shell and is in sliding connection with the inner shell, and the lifting assembly is fixedly connected with the outer shell so as to drive the outer shell to move in the height direction relative to the inner shell, so that the shielding area of the air inlet base is changed; the control module is positioned above the shell and is electrically connected with the lifting assembly and used for controlling the movement of the lifting assembly; and the limiting assembly is arranged in the inner shell and is electrically connected with the control module, one part of the limiting assembly is close to the bottom of the lifting assembly so as to limit the lifting assembly to move downwards, and the other part of the limiting assembly is close to the top of the lifting assembly so as to limit the lifting assembly to move upwards.

Description

Multifunctional air purifier with limiting function

Technical Field

The application relates to the technical field of air purification, in particular to a multifunctional air purifier with a limiting function.

Background

Along with the improvement of living standard, the requirements of people on air quality are also higher and higher, so that various air purifiers are grown on the market. There are more areas for improvement in the current air cleaners. Such as: in the conventional air purifier, the air quantity is regulated by changing the rotation speed of a fan or changing the area or quantity of an air inlet and/or an air outlet. However, by changing the rotation speed of the fan, the load of the fan is increased, the change principle is mainly to change the airflow velocity, and the change of the airflow velocity can generate howling; if the mode of changing the area or the number of the air inlets and the air outlets is adopted, the blocking piece is mainly utilized to move to block or expose the different areas or the number of the air inlets and the air outlets, but in the mode, a driving source is required to drive the blocking piece to move, and in the moving process, the blocking piece can possibly be excessively moved to collide with other components, so that the blocking piece or the other components are damaged.

Disclosure of Invention

The utility model provides a multi-functional air purifier with limit function to improve current air purifier air quantity regulation safety inadequately and the too big problem of noise.

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

in a first aspect, the present application provides a multifunctional air purifier with a limiting function, comprising:

an outer housing;

the inner shell is arranged inside the outer shell and is in sliding connection with the inner wall of the outer shell;

the air inlet base is arranged in the outer shell, is positioned below the inner shell and is positioned at one side close to the bottom of the outer shell, at least one part of the air inlet base extends to the outside of the outer shell, and is communicated with the inner shell and used for allowing air to enter the inner shell;

the lifting assembly is at least partially arranged in the inner shell and is in sliding connection with the inner shell, and the lifting assembly is fixedly connected with the outer shell so as to drive the outer shell to move in the height direction compared with the inner shell, so that the shielding area of the air inlet base is changed;

the control module is positioned above the outer shell, is electrically connected with the lifting assembly and is used for controlling the movement of the lifting assembly;

the limiting assembly is arranged in the inner shell and is electrically connected with the control module, one part of the limiting assembly is located at a position close to the bottom of the lifting assembly so as to limit the lifting assembly to move downwards, and the other part of the limiting assembly is located at a position close to the top of the lifting assembly so as to limit the lifting assembly to move upwards.

In some embodiments of the present application, the lifting assembly includes:

the lifting frame is fixedly connected with the outer shell and is used for driving the outer shell to lift;

the lifting motor is arranged above the outer shell;

the screw rod is in threaded connection with the geometric center of the lifting frame, and one end of the screw rod, which is away from the lifting frame, is connected with the lifting motor;

the sliding guide rod is arranged on the lifting frame in a penetrating mode, the lifting frame can slide along the length direction of the sliding guide rod, and one end of the sliding guide rod is fixed on the inner shell.

In some embodiments of the present application, the multifunctional air purifier further comprises a sterilization assembly disposed within the inner housing; the lifting frame comprises a first frame body, a second frame body and a plurality of extension support arms, wherein the first frame body and the second frame body are oppositely arranged along the height direction, the first frame body is positioned above the second frame body, two ends of the plurality of extension support arms are respectively connected with the circumferential edges of the first frame body and the second frame body, the plurality of extension support arms are matched with the first frame body and the second frame body to enclose a containing area, and the disinfection assembly is positioned in the containing area.

In some embodiments of the present application, the limiting component includes a first limiting member electrically connected to the control module and a second limiting member electrically connected to the control module, where the first limiting member is fixed on the inner housing and located above the lifting frame, and the second limiting member is fixed on the disinfection component and located below the lifting frame; when the lifting frame moves downwards to be abutted with the second limiting piece, the lifting frame stops moving downwards, and when the lifting frame moves upwards to be abutted with the first limiting piece, the lifting frame stops moving upwards.

In some embodiments of the present application, the first limiting piece includes a first limiting seat and a first micro switch, where the first limiting seat is fixedly connected with the inner shell, and the first micro switch is fixed on the first limiting seat and is electrically connected with the control module; the second limiting part comprises a second limiting seat and a second micro switch, the second limiting seat is fixedly connected with the disinfection assembly, and the second micro switch is fixed on the second limiting seat and is electrically connected with the control module.

In some embodiments of the present application, the second support body is the ring form, follows the circumference of second support body is equipped with first butt piece and second butt piece, first butt piece is located the inner peripheral wall of second support body, the second butt piece is located the outer peripheral wall of second support body, along the height direction projection, first micro-gap switch's projection with the projection coincidence of first butt piece, the projection of second micro-gap switch with the projection coincidence of second butt piece.

In some embodiments of the present application, the multifunctional air purifier further includes an atomization assembly, a filtering assembly and a disinfection assembly, the atomization assembly is disposed above the outer shell, the control module is disposed in the atomization assembly, the filtering assembly and the disinfection assembly are disposed in the outer shell and are communicated with the air inlet base, and the atomization assembly and the disinfection assembly are electrically connected with the control module.

The technical scheme of the embodiment of the application has at least the following advantages and beneficial effects:

the application provides a multi-functional air purifier with limit function, it is main through utilizing spacing subassembly and control module cooperation to control lifting unit's removal and static, restriction lifting unit drives the position that outer shell goes up and down, avoids lifting unit lifting distance too much to lead to air purifier to damage. The outer shell is connected with the inner shell in a sliding way, so that the outer shell can slide in the height direction relative to the inner shell, the lifting assembly is fixedly connected with the outer shell and is connected with the inner shell in a sliding way, the lifting function of the lifting assembly is utilized to drive the outer shell to slide in the height direction on the inner shell, and the change of the air inlet quantity of the air inlet base can be realized in the sliding process; then, one part of the limiting component is arranged at a position close to the bottom of the lifting component, and the other part of the limiting component is arranged at a position close to the top of the lifting component, so that the limiting component is used for limiting the up-and-down moving distance of the lifting component, the phenomenon that the lifting component is overlarge in lifting distance, air inlet and air outlet are influenced, and even the lifting component is damaged is avoided; finally, the limiting assembly is electrically connected with the control module, so that the lifting assembly is in lifting process, when the lifting assembly is in butt joint with the limiting assembly, the control module can receive an electric signal from the limiting assembly, control of the lifting assembly is achieved, and forced movement of the lifting assembly is further avoided, and the air purifier is damaged.

Drawings

For a clearer description of an embodiment of the present application, reference will be made to the accompanying drawings of embodiments, which, as will become apparent, relate only to some embodiments of the present application and are not limiting of the present application, wherein:

fig. 1 is a schematic structural diagram of a multifunctional air purifier with a limiting function according to an embodiment of the present application;

FIG. 2 is a schematic diagram of the explosive structure of FIG. 1;

fig. 3 is a schematic structural diagram of a limit component and a lifting frame in cooperation with each other according to an embodiment of the present application;

fig. 4 is a schematic structural view of a first limiting member provided in an embodiment of the present application;

fig. 5 is a schematic structural diagram of the cooperation of the lifting frame and the screw provided in the embodiment of the application.

Icon: 1. an outer housing; 2. an inner housing; 3. an air inlet base; 4. a lifting assembly; 41. a lifting frame; 411. a first frame body; 412. a second frame body; 4121. a first abutment block; 4122. a second abutment block; 413. extending the support arm; 414. a receiving area; 42. a lifting motor; 43. a screw rod; 44. a sliding guide rod; 5. a control module; 6. a limit component; 61. a first limiting member; 611. the first limiting seat; 612. a first microswitch; 62. a second limiting piece; 7. a sterilization assembly; 8. an atomizing assembly.

Detailed Description

The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. Based on the embodiments herein, all other embodiments that a person skilled in the art would obtain without making any inventive effort are within the scope of protection of the present application.

In the description of the present application, it should be understood that the words "first" and "second" are used for descriptive purposes only and are not to be interpreted as indicating or implying a relative importance or number of features in which such is indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more features. In the description of the present application, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

For ease of understanding of the solution of the present application, spline curves and arrows used for reference numerals in the drawings are described herein: the parts indicated for the spline without arrow are solid parts, i.e. parts with solid structure; the parts indicated for the spline with arrow are virtual parts, i.e. parts without solid structure.

Please see fig. 1 and fig. 2, the application provides a multifunctional air purifier with limiting function, which integrates functions such as air purification and humidification, and can realize the functions through one machine, thereby saving indoor space, improving convenience of using multiple functions for people and reducing cost. For this multifunctional air purifier, include:

an outer case 1;

the inner shell 2 is arranged inside the outer shell 1 and is in sliding connection with the inner wall of the outer shell 1;

the air inlet base 3 is arranged in the outer shell 1, the air inlet base 3 is positioned below the inner shell 2 and is positioned at one side close to the bottom of the outer shell 1, at least one part of the air inlet base 3 extends to the outside of the outer shell 1, and the air inlet base 3 is communicated with the inner shell 2 and is used for allowing air to enter the inner shell 2;

the lifting assembly 4 is at least partially arranged in the inner shell 2 and is in sliding connection with the inner shell 2, and the lifting assembly 4 is fixedly connected with the outer shell 1 so as to drive the outer shell 1 to move in the height direction compared with the inner shell 2, so that the shielding area of the air inlet base 3 is changed;

the control module 5 is positioned above the outer shell 1, is electrically connected with the lifting assembly 4 and is used for controlling the movement of the lifting assembly 4;

the limiting component 6 is arranged in the inner shell 2 and is electrically connected with the control module 5, one part of the limiting component 6 is positioned close to the bottom of the lifting component 4 so as to limit the lifting component 4 to move downwards, and the other part of the limiting component 6 is positioned close to the top of the lifting component 4 so as to limit the lifting component 4 to move upwards.

In addition, the air purifier further comprises a filtering component, a sterilizing component 7, an atomizing component 8, a fan and an air outlet top seat. The filtering component, the fan and the disinfection component 7 are all arranged in the outer shell 1, the air outlet footstock is arranged at the inner top of the outer shell 1, the atomization component 8 is arranged above the outer shell 1 and connected with the air outlet footstock, and the control module 5 is arranged in the atomization component 8. The filtering component, the sterilizing component 7 and the air outlet top seat are all communicated with the air inlet base 3. The filter component is mainly used for filtering air, the disinfection component 7 is mainly used for disinfecting and sterilizing the air, the air outlet footstock is mainly used for discharging the filtered and sterilized air to the external environment, the fan is mainly used for absorbing the air of the external environment into the outer shell 1 and providing the power of air flow, and the atomization component 8 is mainly used for atomizing and discharging the added water to the external environment. The fan, the atomizing assembly 8 and the sterilizing assembly 7 are electrically connected with the control module 5, so that intelligent control is realized on the fan, the atomizing assembly 8 and the sterilizing assembly 7 through the control module 5.

The technical scheme that this application provided is mainly through utilizing spacing subassembly 6 and control module 5 cooperation to control lifting unit 4 remove and static, restriction lifting unit 4 drive the position that shell body 1 goes up and down, avoid lifting unit 4 lifting distance too much to lead to the air purifier to damage. Specifically, the outer casing 1 and the inner casing 2 are slidably connected, so that the outer casing 1 can slide in the height direction relative to the inner casing 2, the lifting assembly 4 is fixedly connected with the outer casing 1 and slidably connected with the inner casing 2, the lifting function of the lifting assembly 4 is utilized to drive the outer casing 1 to slide in the height direction on the inner casing 2, and the change of the air inlet quantity of the air inlet base 3 can be realized in the sliding process; then, by utilizing the limiting component 6, one part of the limiting component 6 is arranged at a position close to the bottom of the lifting component 4, and the other part of the limiting component is arranged at a position close to the top of the lifting component 4, so that the limiting of the distance of the lifting component 4 for moving up and down is realized through the limiting component 6, the phenomenon that the lifting distance of the lifting component 4 is overlarge, the air inlet and the air outlet are influenced, and even the lifting component 4 is damaged is avoided; finally, the limiting component 6 is electrically connected with the control module 5, so that the lifting component 4 is in lifting process, when the lifting component 4 is abutted against the limiting component 6, the control module 5 can receive an electric signal from the limiting component 6, control of the lifting component 4 is achieved, and forced movement of the lifting component 4 is further avoided, so that the air purifier is damaged.

In some embodiments, referring to fig. 2, 3 and 5, the lifting assembly 4 includes:

the lifting frame 41 is fixedly connected with the outer shell 1 and is used for driving the outer shell 1 to lift;

a lifting motor 42, wherein the lifting motor 42 is arranged above the outer shell 1;

the screw 43 is in threaded connection with the geometric center of the lifting frame 41, and one end of the screw 43, which is away from the lifting frame 41, is connected with the lifting motor 42;

the sliding guide 44, the sliding guide 44 is inserted into the lifting frame 41, the lifting frame 41 can slide along the length direction of the sliding guide 44, and one end of the sliding guide 44 is fixed on the inner housing 2.

Through the sliding connection of the outer shell 1 and the inner shell 2, the outer shell 1 can have a sliding stress foundation, and the outer shell 1 slides along the height direction of the inner shell 2. The inner shell 2 is fixed on the air inlet base 3, so that when the outer shell 1 slides, the inner shell 2 generates synchronous motion, and the outer shell 1 moves unstably. The lifting frame 41 is disposed in the outer casing 1 and connected with the outer casing 1, so that the lifting frame 41 can drive the outer casing 1 to move in the height direction. When the lifting motor 42 is started, the output end of the lifting motor 42 rotates to drive the screw 43 to rotate, so that the lifting frame 41 is lifted in the height direction, and the outer shell 1 is driven to lift. Specifically, up or down, the operator can adjust the rotation direction of the lift motor 42 as desired, depending on the rotation direction of the lift motor 42. And, for the distance by which the lifting frame 41 can be precisely controlled according to the number of turns of the lifting motor 42 by adopting the cooperation of the lifting motor 42 and the screw 43, the lifting motor 42 may be a stepping motor or a servo motor, without limitation.

Further, the lifting frame 41 is slidably connected with the sliding guide rod 44, and by using the sliding guide rod 44, the sliding direction of the lifting frame 41 can be effectively limited, the stability of the whole lifting process is improved, and the lifting frame 41 is prevented from shifting in the lifting process.

In some embodiments, the lifting frame 41 includes a first frame 411, a second frame 412, and a plurality of extension arms 413, the first frame 411 and the second frame 412 are disposed opposite to each other along the height direction, the first frame 411 is located above the second frame 412, two ends of the plurality of extension arms 413 are respectively connected to circumferential edges of the first frame 411 and the second frame 412, and the plurality of extension arms 413 cooperate with the first frame 411 and the second frame 412 to enclose a containing area 414, and the sterilizing component 7 is located in the containing area 414. For the first frame 411 and the second frame 412, the diameter of the second frame 412 is larger than that of the first frame 411, so that the projection of the first frame 411 falls into the projection of the second frame 412 in the height direction. The two ends of the plurality of extension support arms 413 are respectively connected with the first frame 411 and the second frame 412 and are in an inclined state, and the plurality of extension support arms 413 are arranged in an array along the circumferential direction of the first frame 411, so that the first frame 411 and the second frame 412 are connected together and the overall strength of the lifting frame 41 is increased. In addition, the lifting frame 41 is formed by the first frame 411, the second frame 412 and the extending support arms 413 arranged in an array, so that the lifting effect of the outer shell 1 can be driven, and meanwhile, too much obstruction to airflow flow is not formed, and enough space is reserved as far as possible for air to pass through. A screw hole is provided in the center of the first frame 411, and one end of the screw 43 penetrates into and is screwed with the screw hole. When the lifting motor 42 rotates to drive the screw 43 to rotate, the lifting frame 41 can drive the outer shell 1 to do lifting motion. The cooperation between the first frame 411, the second frame 412 and the extension arm 413 conveniently forms a holding area 414 under the first frame 411 for placing the sterilizing component 7, so that the space in the outer casing 1 is saved, and the structure is more compact.

In some embodiments, referring to fig. 3 and 4, the limiting assembly 6 includes a first limiting member 61 electrically connected to the control module 5 and a second limiting member 62 electrically connected to the control module 5, the first limiting member 61 is fixed on the inner housing 2 and located above the lifting frame 41, and the second limiting member 62 is fixed on the sterilizing assembly 7 and located below the lifting frame 41; when the lifter 41 moves downward to abut against the second stopper 62, the lifter 41 stops moving downward, and when the lifter 41 moves upward to abut against the first stopper 61, the lifter 41 stops moving upward. In detail, an installation site for installing the first stopper 61 is provided on the inner housing 2, and the first stopper 61 is screw-coupled with the inner housing 2 at the installation site. The first stopper 61 is located above the lifting frame 41, and when the lifting frame 41 is lifted to a certain height, the first stopper 61 abuts against the first stopper 61, thereby preventing the lifting frame 41 from further lifting. And first locating part 61 is connected with control module 5 electricity, and when first locating part 61 and crane 41 butt, first locating part 61 just can switch on and transmit the signal of telecommunication to control module 5, and control module 5 control elevator motor 42 stop work cuts off the power source of going up and down, ensures that crane 41 can not continuously form the extrusion to first locating part 61. Because the disinfection assembly 7 is located in the accommodation area 414, an installation position for installing the second limiting piece 62 is arranged on the outer shell of the disinfection assembly 7, the second limiting piece 62 is fixed on the installation position, and the structure and the position of the existing parts are fully utilized, so that the whole structure is more compact. Similarly, the second limiting member 62 is located below the lifting frame 41, and when the lifting frame 41 descends to a certain height, the second limiting member 62 abuts against the lifting frame 41, so that the lifting frame 41 is prevented from continuing to descend. And the second limiting piece 62 is electrically connected with the control module 5, when the second limiting piece 62 is abutted with the lifting frame 41, the second limiting piece 62 is conducted and transmits an electric signal to the control module 5, the control module 5 controls the lifting motor 42 to stop working, the lifting power source is cut off, and the lifting frame 41 is ensured not to continuously extrude the second limiting piece 62.

Further, referring to fig. 4, the first limiting member 61 includes a first limiting seat 611 and a first micro switch 612, the first limiting seat 611 is fixedly connected with the inner housing 2, and the first micro switch 612 is fixed on the first limiting seat 611 and is electrically connected with the control module 5; the second limiting member 62 includes a second limiting seat and a second micro-switch, the second limiting seat is fixedly connected with the sterilizing assembly 7, and the second micro-switch is fixed on the second limiting seat and is electrically connected with the control module 5. The first limiting seat 611 is a rectangular block, a placement notch is formed on one side of the rectangular block, the first micro switch 612 is disposed in the placement notch, and portions of the first limiting seat 611 located on two sides of the first micro switch 612 are in threaded connection with the inner housing 2 through bolts. For the first micro-switch 612, it includes a fixing base and an elastic sheet, both of which are made of metal materials, so as to have a conductive effect. One end of the spring plate is connected with the fixed seat, the other end of the spring plate is in a state of being far away from the fixed seat towards the direction of the lifting frame 41 in a natural state, when the lifting frame 41 rises to a certain height, the spring plate is pushed to move towards the fixed seat until the spring plate contacts with the fixed seat, the first microswitch 612 is conducted, the control module 5 controls the lifting motor 42 to stop working, and the lifting frame 41 stops rising. Similarly, the second limiting member 62 has the same structure and operation principle as the first limiting member 61, and the only difference is that the second limiting seat is connected with the sterilizing unit 7. Therefore, the working principle and structure of the second limiting member 62 will not be described in detail.

In some embodiments, the second frame 412 has a ring shape, and a first abutment block 4121 and a second abutment block 4122 are provided along the circumferential direction of the second frame 412. The first abutment block 4121 is provided on the inner peripheral wall of the second frame 412, and the second abutment block 4122 is provided on the outer peripheral wall of the second frame 412. The first abutment block 4121 and the second abutment block 4122 are each integrally formed with the circumferential edge of the second frame 412. Through locating first butt piece 4121 in the inner peripheral wall of second support body 412, second butt piece 4122 locates the outer peripheral wall of second support body 412, can enough adapt to first support body 411 diameter and be less than second support body 412, the structure of the first spacing subassembly 6 of being convenient for respectively with first butt piece 4121 and second butt piece 4122 butt also can reduce the area that second support body 412 needs to occupy on the horizontal plane, makes the structure compacter. The projection of the first micro switch 612 overlaps with the projection of the first abutting block 4121, and the projection of the second micro switch overlaps with the projection of the second abutting block 4122, so that when the lifting frame 41 is lifted, the lifting frame is lifted or lowered to a certain height, and the first micro switch 612 or the second micro switch can abut with the first abutting block 4121 or the second abutting block 4122, so that the lifting motor 42 is controlled to stop working, and intelligent limiting is realized. It should be further noted that, the projections of the first limiting seat 611 and the second limiting seat along the height direction overlap with the projections of the first abutting block 4121 and the second abutting block 4122 along the height direction, and the projection areas of the first limiting seat 611 and the second limiting seat are larger than the projection areas of the first abutting block 4121 and the second abutting block 4122, so that the first limiting seat 611 and the second limiting seat can play a role in limiting assistance, even if the current micro switch is not turned on due to a fault, or the control module 5 is not turned on due to a fault, or the lifting motor 42 cannot stop working due to damage such as the lifting motor 42, the forced lifting movement of the lifting frame 41 can be prevented by utilizing the first limiting seat 611 and the second limiting seat, so that the air purifier is prevented from being damaged more.

While the basic concepts have been described above, it will be apparent to those skilled in the art that the foregoing detailed disclosure is by way of example only and is not intended to be limiting. Although not explicitly described herein, various modifications, improvements, and adaptations of the present application may occur to one skilled in the art. Such modifications, improvements, and modifications are intended to be suggested within this application, and are therefore within the spirit and scope of the exemplary embodiments of this application.

Meanwhile, the present application uses specific words to describe embodiments of the present application. Reference to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic is associated with at least one embodiment of the present application. Thus, it should be emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various positions in this specification are not necessarily referring to the same embodiment. Furthermore, certain features, structures, or characteristics of one or more embodiments of the present application may be combined as suitable.

Likewise, it should be noted that in order to simplify the presentation disclosed herein and thereby aid in understanding one or more application embodiments, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure. This method of disclosure, however, is not intended to imply that more features than are presented in the claims are required for the subject application. Indeed, less than all of the features of a single embodiment disclosed above.

For each patent, patent application publication, and other material, such as articles, books, specifications, publications, documents, etc., cited in this application, the entire contents of which are hereby incorporated by reference into this application, except for the application history documents which are inconsistent or conflict with the contents of this application, and for documents which have limited the broadest scope of the claims of this application (currently or hereafter attached to this application). It is noted that the descriptions, definitions, and/or terms used in the subject matter of this application are subject to the use of descriptions, definitions, and/or terms in case of inconsistent or conflicting disclosure.

The foregoing is merely a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and variations may be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (7)

1. Multifunctional air purifier with limit function, characterized by comprising:

an outer housing;

the inner shell is arranged inside the outer shell and is in sliding connection with the inner wall of the outer shell;

the air inlet base is arranged in the outer shell, is positioned below the inner shell and is positioned at one side close to the bottom of the outer shell, at least one part of the air inlet base extends to the outside of the outer shell, and is communicated with the inner shell and used for allowing air to enter the inner shell;

the lifting assembly is at least partially arranged in the inner shell and is in sliding connection with the inner shell, and the lifting assembly is fixedly connected with the outer shell so as to drive the outer shell to move in the height direction compared with the inner shell, so that the shielding area of the air inlet base is changed;

the control module is positioned above the outer shell, is electrically connected with the lifting assembly and is used for controlling the movement of the lifting assembly;

the limiting assembly is arranged in the inner shell and is electrically connected with the control module, one part of the limiting assembly is located at a position close to the bottom of the lifting assembly so as to limit the lifting assembly to move downwards, and the other part of the limiting assembly is located at a position close to the top of the lifting assembly so as to limit the lifting assembly to move upwards.

2. The multifunctional air purifier with limiting function according to claim 1, wherein the lifting assembly comprises:

the lifting frame is fixedly connected with the outer shell and is used for driving the outer shell to lift;

the lifting motor is arranged above the outer shell;

the screw rod is in threaded connection with the geometric center of the lifting frame, and one end of the screw rod, which is away from the lifting frame, is connected with the lifting motor;

the sliding guide rod is arranged on the lifting frame in a penetrating mode, the lifting frame can slide along the length direction of the sliding guide rod, and one end of the sliding guide rod is fixed on the inner shell.

3. The multifunctional air purifier with limiting function according to claim 2, further comprising a sterilizing assembly, wherein the sterilizing assembly is arranged in the inner shell; the lifting frame comprises a first frame body, a second frame body and a plurality of extension support arms, wherein the first frame body and the second frame body are oppositely arranged along the height direction, the first frame body is positioned above the second frame body, two ends of the plurality of extension support arms are respectively connected with the circumferential edges of the first frame body and the second frame body, the plurality of extension support arms are matched with the first frame body and the second frame body to enclose a containing area, and the disinfection assembly is positioned in the containing area.

4. A multifunctional air purifier with a limiting function according to claim 3, wherein the limiting assembly comprises a first limiting piece electrically connected with the control module and a second limiting piece electrically connected with the control module, the first limiting piece is fixed on the inner shell and is positioned above the lifting frame, and the second limiting piece is fixed on the disinfection assembly and is positioned below the lifting frame; when the lifting frame moves downwards to be abutted with the second limiting piece, the lifting frame stops moving downwards, and when the lifting frame moves upwards to be abutted with the first limiting piece, the lifting frame stops moving upwards.

5. The multifunctional air purifier with the limiting function according to claim 4, wherein the first limiting piece comprises a first limiting seat and a first micro switch, the first limiting seat is fixedly connected with the inner shell, and the first micro switch is fixed on the first limiting seat and is electrically connected with the control module; the second limiting part comprises a second limiting seat and a second micro switch, the second limiting seat is fixedly connected with the disinfection assembly, and the second micro switch is fixed on the second limiting seat and is electrically connected with the control module.

6. The multifunctional air purifier with the limiting function according to claim 5, wherein the second frame body is in a circular ring shape, a first abutting block and a second abutting block are arranged along the circumferential direction of the second frame body, the first abutting block is arranged on the inner circumferential wall of the second frame body, the second abutting block is arranged on the outer circumferential wall of the second frame body and projects in the height direction, the projection of the first micro switch is overlapped with the projection of the first abutting block, and the projection of the second micro switch is overlapped with the projection of the second abutting block.

7. The multifunctional air purifier with limiting functions according to claim 1, further comprising an atomization assembly, a filtering assembly and a disinfection assembly, wherein the atomization assembly is arranged above the outer shell, the control module is arranged in the atomization assembly, the filtering assembly and the disinfection assembly are arranged in the outer shell and are communicated with the air inlet base, and the atomization assembly and the disinfection assembly are electrically connected with the control module.