CN114244015B

CN114244015B - Small motor for breathing machine

Info

Publication number: CN114244015B
Application number: CN202111536973.3A
Authority: CN
Inventors: 王雪莲; 黄炳锋
Original assignee: Shenzhen Zhongping Motor Co ltd
Current assignee: Shenzhen Zhongping Motor Co ltd
Priority date: 2021-12-14
Filing date: 2021-12-14
Publication date: 2022-11-29
Anticipated expiration: 2041-12-14
Also published as: CN114244015A

Abstract

The invention discloses a small motor used on a respirator, which comprises a main motor arranged in a mounting box in the respirator, wherein the mounting box is also provided with an auxiliary motor, an output shaft for outputting torque outwards is arranged in the mounting box, the mounting box is also provided with a second bevel gear, the second bevel gear is arranged on a driven shaft, the top of the mounting box is also provided with a sterilization component, a motor set for driving the respirator is formed by the movably arranged main motor and the auxiliary motor, the main motor and the auxiliary motor are mutually standby, the main motor or the auxiliary motor drives a swinging component to work through the second bevel gear, the swinging component drives cooling swing rods arranged on the main motor and the auxiliary motor to swing in a reciprocating manner, a sac-shaped heat exchange body at the lower end of the cooling swing rods and the motor carry out contact type heat exchange, the motor is cooled continuously, the sterilization component is arranged on a swinging path of the cooling swing rods, the effective maintenance of the internal environment is realized through the dynamic air supply sterilization in the respirator, and the durable use effect of the respirator is improved.

Description

Small-sized motor for breathing machine

Technical Field

The invention relates to the field of breathing machines, in particular to a small motor for a breathing machine.

Background

The breathing machine is an important medical appliance, has the function of auxiliary ventilation, and plays an irreplaceable role in various occasions of respiratory failure, anesthesia respiratory management, emergency resuscitation and the like.

In various types of ventilators, the most basic power element is often a small motor, which directly serves elements such as a breathing pump in breathing, and the like, and maintains the normal operation of the ventilator, and the following problems are found in the long-term usage of the ventilator:

1. the respirator is used as an important medical apparatus and is required to be used in various treatments, when wide-range infection and illness occur due to limited or urgent medical facility conditions, the respirator needs to continuously work for a long time, and for a motor in a compact structure in the respirator, how to keep the motor to effectively dissipate heat is the key for maintaining the stable operation of the respirator;

2. when the respirator is used, external air is needed to be supplied, not only for realizing the heat dissipation of elements, but also the use of an internal air-oxygen mixer is inevitably required, in the process, due to the particularity of the ward environment, the accumulation of bacteria and germs is easily formed inside the respirator, and the inside of the respirator needs to be sterilized and disinfected regularly, so that the use of the respirator is greatly restricted.

Disclosure of Invention

The present invention is directed to a small motor for a ventilator to solve the problems of the prior art.

In order to achieve the purpose, the invention provides the following technical scheme:

a small-sized motor used on a breathing machine comprises a main motor arranged in a mounting box in the breathing machine, wherein the mounting box is also provided with an auxiliary motor, the output ends of the main motor and the auxiliary motor are oppositely arranged, an output shaft for outputting torque outwards is arranged in the mounting box, one end of the output shaft, which is positioned at the mounting box, is provided with a first bevel gear, the output ends of the main motor and the auxiliary motor are connected with a driving bevel gear meshed with the first bevel gear, and the first bevel gear is kept in a meshed state with the driving bevel gear connected with the output end of the main motor or the output end of the auxiliary motor;

the mounting box is also internally provided with a second bevel gear which is opposite to the first bevel gear and is meshed with the driving bevel gear, the second bevel gear is arranged on a driven shaft which is coaxial with the output shaft, the driven shaft is connected with a cooling swing rod which can perform reciprocating swing to dissipate heat of the main motor or the auxiliary motor through a swing component, and the top of the mounting box is also provided with a sterilization component which performs internal sterilization along with the reciprocating swing of the cooling swing rod.

As a further scheme of the invention: the main motor and the auxiliary motor are slidably mounted in the mounting box in the direction of the output ends of the main motor and the auxiliary motor.

As a still further scheme of the invention: the main motor and the auxiliary motor are both installed on the installation seat, the installation seat is installed in the guide sliding rails matched with each other in a sliding mode, and the installation seat is connected with the push plates.

As a still further scheme of the invention: the cooling swing rod is installed above the main motor and the auxiliary motor through the installation shaft connected to the middle of the cooling swing rod in a rotating mode, the cooling swing rod comprises a rod piece, a cooling cavity used for filling cooling liquid is arranged in the rod piece, and a swing gear is installed on the installation shaft in a sleeved mode.

As a still further scheme of the invention: and the two sides of the cooling swing rod are provided with a saccular heat exchange body facing the main motor or the auxiliary motor.

As a still further scheme of the invention: the swing assembly comprises a driving wheel, a swing block and a fan-shaped swing piece, the driving wheel is installed on the driven shaft, a convex block is eccentrically and fixedly arranged on the driving wheel, a sliding groove matched with the convex block is formed in the swing block, the upper end of the swing block is rotatably connected with the fan-shaped swing piece, and a tooth pattern section meshed with a swing gear connected to the cooling swing rod is upwards arranged on the arc surface section of the fan-shaped swing piece.

As a still further scheme of the invention: the upper end of mounting box is equipped with the subassembly of disinfecting, the subassembly of disinfecting includes a chimney and an air inlet section of thick bamboo, the outside of an air inlet section of thick bamboo is tangent with the swing orbit of cooling pendulum rod, an air inlet section of thick bamboo rotates and installs on the chimney, is equipped with the flabellum of supplying air in the chimney when rotating in the air inlet section of thick bamboo, install the section of thick bamboo of disinfecting to carrying out germicidal treatment through the air current in the chimney.

As a still further scheme of the invention: the outer side of the air inlet cylinder is fixedly sleeved with a contact ring, and the edge of the cooling swing rod is provided with a contact block which is in contact transmission with the contact ring during swing.

As a still further scheme of the invention: the sterilizing cylinder is internally provided with a pre-filtering layer, a plasma electrostatic field treatment layer and a photocatalyst layer in sequence along the air inlet direction.

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

1. the breathing machine is characterized in that a motor set for driving the breathing machine is formed by adopting a main motor and an auxiliary motor which are movably arranged, one of the two groups of motors is kept in a meshing output state, and the two motors are mutually standby, so that the working state of a certain motor can be ensured through switching of the motors in the process of the ultra-long time operation of the breathing machine, effective double insurance is formed, and the accidental shutdown of the motor due to failure is avoided;

2. when the main motor or the auxiliary motor is meshed to output power, the swinging assembly is driven to work through the second bevel gear, the swinging assembly drives the cooling swing rods arranged on the main motor and the auxiliary motor to swing in a reciprocating mode, the bag-shaped heat exchange body at the lower end of the cooling swing rod carries out contact type heat exchange with the motor, continuous cooling treatment is carried out on the motor, and heat dissipation of cooling liquid is improved in the flowing process;

3. set up the subassembly that disinfects on the swing route of cooling pendulum rod, the cooling pendulum rod provides the power of air supply, and the air inlet section of thick bamboo takes place the contact transmission along with the swing of cooling pendulum rod, and intermittent type supplies air to in the draft tube, sends into the section of thick bamboo of disinfecting in the draft tube with the air in mounting box and the breathing machine, filters, sterilization processing via the section of thick bamboo of disinfecting to disinfect through this dynamic air supply in the breathing machine and realize the effective maintenance to the internal environment, promote the lasting result of use of breathing machine.

Drawings

Fig. 1 is a schematic structural diagram of a small motor used on a respirator.

Fig. 2 is a top view of a small motor for use on a ventilator.

Fig. 3 is a schematic structural diagram of a cooling swing rod in a small motor used for a respirator.

Fig. 4 is a schematic structural diagram of a swing assembly in a small motor used for a respirator.

Fig. 5 is a schematic structural diagram of a sterilization assembly in a small motor used for a respirator.

Fig. 6 is a schematic structural diagram of a connecting lantern ring and a limit check ring in a small motor used on a respirator.

Fig. 7 is a schematic structural diagram of a contact ring in a small motor used for a respirator.

Fig. 8 is a schematic structural view of a sterilizing drum in a small motor for a respirator.

Wherein: 1. mounting a box; 2. a main motor; 3. a secondary motor; 4. driving the helical gear; 5. a second helical gear; 6. a swing assembly; 601. a drive wheel; 602. a swing block; 603. a bump; 604. a sector oscillating piece; 7. cooling the oscillating bar; 701. a rod member; 702. a cooling chamber; 703. a wobble gear; 704. installing a shaft; 8. a sterilization assembly; 801. an air inlet cylinder; 802. a funnel; 803. a sterilizing drum; 8031. a pre-filter layer; 8032. a plasma electrostatic field treatment layer; 8033. a photocatalyst layer; 804. a connecting lantern ring; 805. a limit retainer ring; 806. a contact ring; 807. a boom; 9. a contact block; 10. a bladder-shaped heat exchange body; 11. a guide slide rail; 12. pushing a plate; 13. a mounting seat; 14. an output shaft; 15. a first helical gear; 16. a driven shaft.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 invention.

Example 1:

referring to fig. 1 to 4, in an embodiment of the present invention, a small-sized motor for a ventilator includes a main motor 2 and an auxiliary motor 3 which are arranged in a mounting box 1 in the ventilator, output ends of the main motor 2 and the auxiliary motor 3 are arranged opposite to each other, an output shaft 14 which is connected to an external gear box and outputs torque to the outside is arranged in the mounting box 1, one end of the output shaft 14, which is located at the mounting box 1, is provided with a first bevel gear 15, output ends of the main motor 2 and the auxiliary motor 3 are connected to a driving bevel gear 4 engaged with the first bevel gear 15, the driving bevel gear 4 connected to the main motor 2 or the auxiliary motor 3 is maintained in a contact engagement state with the first bevel gear 15 during operation, the main motor 2 and the auxiliary motor 3 are mutually standby, the main motor 2 and the auxiliary motor 3 are slidably mounted in the mounting box 1 in a direction of the output ends thereof, a second bevel gear 5 which is opposite to the first bevel gear 15 and engaged with the driving bevel gear 4 is further arranged in the mounting box 1, the second bevel gear 5 is mounted on a driven shaft 16 which is arranged coaxially with the output shaft 14, and a swing assembly 6 is connected to a reciprocating swing rod 7 for cooling the main motor 2 or the auxiliary motor.

As shown in fig. 2, the main motor 2 and the auxiliary motor 3 are both mounted on a mounting seat 13, the mounting seat 13 is slidably mounted in a guide slide rail 11 matched with the mounting seat 13, and the mounting seat 13 is connected with a push plate 12 for driving the mounting seat to move so as to adjust the main motor 2 or the auxiliary motor 3 to be engaged with a first bevel gear 15; when the needed adjustment is carried out, the mounting seat 13 is driven by the push plate 12 which is operated electrically or manually to slide on the guide slide rail 11 of the mounting box 1, so that the main motor 2 or the auxiliary motor 3 is in a working state, the first bevel gear 15 is driven to rotate, and power is output to the breathing machine; in order to keep the mounting seat 13 in a stable state, and thus to keep the main motor 2 or the auxiliary motor 3 in a state of required work engagement or stop waiting, a screw hole matched with the guide rod of the push plate 12 is formed in the mounting box 1, the push plate 12 rotates to adjust the mounting seat 13, and necessary limit fixing is performed on the position of the mounting seat 13.

As shown in fig. 3, the cooling swing link 7 is rotatably mounted above the main motor 2 and the auxiliary motor 3 through a mounting shaft 704 connected to the middle of the cooling swing link 7, the cooling swing link 7 includes a rod 701, a cooling chamber 702 for filling cooling liquid is provided in the rod 701, and a swing gear 703 is further sleeved on the mounting shaft 704; furthermore, the two sides of the cooling swing rod 7 are respectively provided with a capsule-shaped heat exchange body 10 facing the main motor 2 or the auxiliary motor 3, and the capsule-shaped heat exchange bodies can play a good role in buffering and protecting when contacting with the motors and performing contact type heat exchange on the motors; in use, the cooling chamber 702 of the rod 701 is filled with cooling fluid that is generally no more than one-half the capacity of the cooling chamber 702, so that the cooling fluid has sufficient flow space to oscillate and dissipate heat during flow.

As shown in fig. 4, the swing assembly 6 includes a driving wheel 601, a swing block 602 and a fan-shaped swing piece 604, the driving wheel 601 is mounted on the driven shaft 16, and when the second bevel gear 5 is driven by meshing to drive the driven shaft 16 to rotate, the driving wheel 601 is driven to rotate together, a bump 603 is eccentrically and fixedly disposed on the driving wheel 601, a sliding groove matched with the bump 603 is disposed on the swing block 602, the upper end of the swing block 602 is rotatably connected with the fan-shaped swing piece 604, and an arc-shaped section of the fan-shaped swing piece 604 is disposed upward and is provided with a toothed section meshed with a swing gear 703 connected to the cooling swing rod 7; when the driving wheel 601 rotates, the fixed eccentrically arranged lug 603 rotates along with the driving wheel, so that the swinging block 602 is pulled to swing back and forth, the swinging of the swinging block 602 synchronously drives the fan-shaped swinging piece 604 to swing, the fan-shaped swinging piece is driven to rotate back and forth by utilizing the meshing action of the arc surface section on the fan-shaped swinging piece 604 and the mounting shaft 704 on the cooling swinging rod 7, the reciprocating forward and reverse rotation of the fan-shaped swinging piece is further realized, the reciprocating swinging of the cooling swinging rod 7 on the main motor 2 and the auxiliary motor 3 is realized, the main motor 2 or the auxiliary motor 3 is subjected to contact type heat exchange cooling by utilizing the cooling liquid in the fan-shaped swinging piece, and the heat dissipation of the cooling liquid is improved in the flowing process.

Example 2:

referring to fig. 5 to 8, the embodiment of the present invention explains the related sterilization function of a small motor used in a ventilator:

the upper end of mounting box 1 is equipped with the subassembly 8 that disinfects, the subassembly 8 that disinfects includes chimney 802 and an air inlet drum 801, the outside of an air inlet drum 801 is tangent with the swing orbit of cooling pendulum rod 7, and an air inlet drum 801 rotates and installs on chimney 802, is equipped with the flabellum of air supply in to the chimney 802 during rotation in the air inlet drum 801, chimney 802 is through its upper end jib 807 fixed mounting in mounting box 1 or the breathing machine, install the section of thick bamboo 803 of disinfecting to the process air current among the chimney 802.

The contact ring 806 is fixedly sleeved on the outer side of the air inlet cylinder 801, the edge of the cooling swing rod 7 is provided with the contact block 9 which is in contact transmission with the contact ring 806 when swinging, so that the rotation of the air inlet cylinder 801 is realized through the action of the contact block 9 and the contact ring 806 when the cooling swing rod 7 swings, preferably, the rotation trend of the air inlet cylinder 801 is realized through the rotation trend of the cooling swing rod 7 on the condition that the cooling swing rod swings from top to bottom, the rotation air supply of fan blades in the air inlet cylinder 801 is realized, the process can be maintained for a relatively long time along with the inertia, and the sterilization treatment effect is improved.

The utility model discloses an air inlet pipe 801, including air inlet pipe 801, air inlet pipe 802, the cooperation that is equipped with the horizontally in the framework of air inlet pipe 801 and connects lantern ring 804, be equipped with on the draft tube 802 and connect lantern ring 804 assorted rotation groove, air inlet pipe 801 rotates through the cooperation of connecting lantern ring 804 and the last rotation groove of draft tube 802 and installs on draft tube 802, air inlet pipe 801 is arranged in the spacing retaining ring 805 of end fixedly connected with in draft tube 802, be equipped with on the draft tube 802 with spacing retaining ring 805 assorted annular spacing groove to the stability of air inlet pipe 801 for draft tube 802 when rotating has been guaranteed.

The sterilizing cylinder 803 is sequentially provided with a pre-filtering layer 8031, a plasma electrostatic field treatment layer 8032 and a photocatalyst layer 8033 along the air inlet direction, the pre-filtering layer 8031 can filter and remove particle pollutants larger than 10 microns, the plasma electrostatic field treatment layer 8032 can remove inhalable particles and bacteria smaller than 10 microns by using a plasma technology, and the photocatalyst layer 8033 further filters submicron inhalable particles and removes peculiar smell and bacteria, so that the excellent filtering and sterilizing effect is comprehensively achieved, the cleanness of the environment in the mounting box 1 and the whole respirator is maintained, the accumulation of internal bacteria and germs is avoided, and the using effect of the respirator is improved.

The number of the sterilization assemblies 8 is two, when the sterilization assemblies 8 are one, the sterilization assemblies are arranged above the main motor 2 or the auxiliary motor 3, and when the sterilization assemblies 8 are two, the sterilization assemblies are respectively arranged above the main motor 2 and the auxiliary motor 3.

In specific uses:

the main motor 2 and the auxiliary motor 3 which are arranged in a sliding mode are adopted to form a motor set for driving the respirator, one of the two sets of motors is kept in a meshing output state, and the two sets of motors are mutually standby, so that the working state of the motor can be guaranteed through switching of the motors in the process of the operation of the respirator for a very long time, effective double insurance is formed, and the accidental shutdown of the motor due to faults is avoided;

when the main motor 2 or the auxiliary motor 3 is meshed to output power, the swing assembly 6 is driven to work through the second bevel gear 5, the driving wheel 601 in the swing assembly 6 is installed on the driven shaft 16, the second bevel gear 5 is meshed to drive the driven shaft 16 to rotate, the driving wheel 601 is driven to rotate together, the driving wheel 601 is fixed on the driving wheel 601 to rotate along with the eccentric lug 603, so that the swing block 602 is pulled to swing back and forth, the swing of the swing block 602 synchronously drives the fan-shaped swing piece 604 to swing, and the cooling swing rod 7 is driven to rotate back and forth in a forward direction and a reverse direction by utilizing the meshing action of the arc surface section on the fan-shaped swing piece 604 and the installation shaft 704 on the cooling swing rod 7, so that the cooling swing rod 7 can swing back and forth on the main motor 2 and the auxiliary motor 3, cooling liquid is filled in the cooling cavity 702 in the cooling swing rod 7, and the bladder-shaped heat exchange body 10 at the lower end is in a contact type with the motor to carry out heat exchange treatment on the motor to carry out continuous cooling treatment on the motor, and the heat dissipation of the cooling liquid is improved in the flowing process;

meanwhile, a sterilization component 8 is arranged on a swinging path of the cooling swing rod 7, a rotating air inlet barrel 801 is arranged in the sterilization component 8, a contact ring 806 which is in contact transmission with the contact block 9 on the cooling swing rod 7 when swinging is sleeved on the digging side of the air inlet barrel 801, the air inlet barrel 801 intermittently supplies air into the ventilating barrel 802 along with the swinging of the cooling swing rod 7, the air in the mounting box 1 and the respirator is sent into the sterilizing barrel 803 in the ventilating barrel 802, and the air is filtered and sterilized through the sterilizing barrel 803, so that the effective maintenance of the internal environment is realized through the dynamic air supply sterilization in the respirator, and the lasting using effect of the respirator is improved.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," and the like are used in the orientations and positional relationships indicated in the drawings, which are based on the orientations and positional relationships indicated in the drawings, and are used for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, in the description of the present invention, "a plurality" means two or more unless otherwise specified. A feature defined as "first," "second," etc. may explicitly or implicitly include one or more of the feature.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A small-sized motor used on a breathing machine comprises a main motor (2) arranged in a mounting box (1) in the breathing machine, and is characterized in that the mounting box (1) is also provided with an auxiliary motor (3), the output ends of the main motor (2) and the auxiliary motor (3) are oppositely arranged, an output shaft (14) for outputting torque outwards is arranged in the mounting box (1), one end, located at the mounting box (1), of the output shaft (14) is provided with a first helical gear (15), the output ends of the main motor (2) and the auxiliary motor (3) are connected with a driving helical gear (4) meshed with the first helical gear (15), and the first helical gear (15) is kept in a meshed state with the driving helical gear (4) connected with the output end of the main motor (2) or the auxiliary motor (3);

a second helical gear (5) which is opposite to the first helical gear (15) and is meshed with the driving helical gear (4) is further arranged in the mounting box (1), the second helical gear (5) is mounted on a driven shaft (16), the driven shaft (16) is connected with a cooling swing rod (7) which can perform reciprocating swing to dissipate heat of the main motor (2) or the auxiliary motor (3) through a swing component (6), and a sterilization component (8) which can perform internal sterilization along with the reciprocating swing of the cooling swing rod (7) is further arranged at the top of the mounting box (1);

cooling pendulum rod (7) are installed in the top of main motor (2) and vice motor (3) through connecting installation axle (704) rotation at its middle part, cooling pendulum rod (7) include member (701), be equipped with in member (701) and be used for filling cooling chamber (702) of coolant liquid, still cup joint on installation axle (704) and install swing gear (703).

2. The small-sized motor for respirator as claimed in claim 1, wherein said main motor (2) and auxiliary motor (3) are slidably mounted in the direction of their output ends in the mounting box (1).

3. The small-sized motor for the breathing machine as claimed in claim 2, wherein the main motor (2) and the auxiliary motor (3) are both mounted on a mounting seat (13), the mounting seat (13) is slidably mounted in the mutually matched guide slide rails (11), and a push plate (12) is connected to the mounting seat (13).

4. The small-sized motor for a respirator according to claim 3, characterized in that the cooling swing link (7) is provided with a saccular heat exchanger (10) facing the main motor (2) or the auxiliary motor (3) on both sides.

5. The small-sized motor for the breathing machine as claimed in claim 1, wherein the swing assembly (6) comprises a driving wheel (601), a swing block (602) and a fan-shaped swing member (604), the driving wheel (601) is mounted on the driven shaft (16), a bump (603) is eccentrically and fixedly arranged on the driving wheel (601), a sliding groove matched with the bump (603) is formed in the swing block (602), the upper end of the swing block (602) is rotatably connected with the fan-shaped swing member (604), and a cambered surface section of the fan-shaped swing member (604) is arranged upwards and is provided with a toothed section meshed with a swing gear (703) connected to the cooling swing rod (7).

6. The small-sized motor used for the breathing machine according to claim 1, wherein a sterilization assembly (8) is arranged at the upper end of the mounting box (1), the sterilization assembly (8) comprises a ventilating duct (802) and an air inlet duct (801), the outer side of the air inlet duct (801) is tangent to the swing track of the cooling swing rod (7), the air inlet duct (801) is rotatably mounted on the ventilating duct (802), fan blades for supplying air into the ventilating duct (802) during rotation are arranged in the air inlet duct (801), and a sterilization duct (803) for performing sterilization treatment on air flow is mounted in the ventilating duct (802).

7. The small-sized motor for the breathing machine according to claim 6, wherein a contact ring (806) is fixedly sleeved on the outer side of the air inlet cylinder (801), and a contact block (9) which is in contact transmission with the contact ring (806) when swinging is arranged on the edge of the cooling swing rod (7).

8. The small-sized motor for the respirator as claimed in claim 7, wherein the sterilizing barrel (803) is provided with a pre-filtering layer (8031), a plasma electrostatic field treatment layer (8032) and a photocatalyst layer (8033) in sequence along the air intake direction.