CN113915718A

CN113915718A - System capable of achieving internal and external circulation disinfection and sterilization fresh air purification

Info

Publication number: CN113915718A
Application number: CN202111278675.9A
Authority: CN
Inventors: 王健
Original assignee: Air Puring Environmental Technology Guangdong Co ltd
Current assignee: Air Puring Environmental Technology Guangdong Co ltd
Priority date: 2021-10-31
Filing date: 2021-10-31
Publication date: 2022-01-11

Abstract

The utility model provides a system that can inside and outside circulation disinfection and sterilization new trend purifies, includes to the indoor outdoor equipment who carries cold wind or warm braw, the air intake of outdoor equipment passes through the air-supply line and connects indoor air-supply line, the air outlet of outdoor equipment passes through the indoor play tuber pipe of air-out pipe connection, is equipped with the purification module that carries out filtration purification to the air between air-supply line and the air-supply line, still is equipped with the ventilation department that lets external new trend get into between air-supply line and the air-supply line, is equipped with electronic or the pneumatic valve body that opens and shuts in this ventilation department. The place where the fresh air enters is arranged between the air inlet pipeline and the air inlet pipe, and the purification module is arranged between the air inlet pipeline and the air inlet pipe, so that the air can be purified before entering the air inlet of the air conditioner outdoor unit, the air is purified and then conveyed indoors, the pipeline is clean and tidy, the air in the conveying room is clean, the pipeline cannot be polluted in an air external circulation mode, and the air inlet cannot be blocked.

Description

System capable of achieving internal and external circulation disinfection and sterilization fresh air purification

Technical Field

The invention relates to an air purification system, in particular to a system capable of internally and externally circulating, disinfecting, sterilizing and purifying fresh air.

Background

The indoor air conditioner is used for cooling or heating indoor air by matching with an outdoor air conditioner in the prior art, some merchants develop a machine for cooling or heating indoor air, the machine is arranged outdoors and comprises the outdoor air conditioner, a condenser and a compressor, the setting of the indoor air conditioner is cancelled, then an air inlet and an air outlet are arranged indoors, the indoor air inlet is connected with an air inlet of the outdoor air conditioner through a pipeline, the indoor air outlet is connected with an air outlet of the outdoor air conditioner through a pipeline, indoor air enters the air inlet of the outdoor air conditioner through the indoor air inlet and then enters the air outlet of the outdoor air conditioner through heat exchange, and cold air or hot air enters indoors from the air outlet, the pipeline and the indoor air outlet of the outdoor air conditioner to provide cold air or hot air indoors.

The air system adopts an internal circulation mode, so that fresh air is lacked, an air inlet communicated with the outside air is formed in the air conditioner outdoor unit by a merchant, the outside air is mixed into the air internal circulation from the air inlet, but the air has dust, particles and the like, so that the phenomenon of blocking the air inlet communicated with the outside air exists, the outside air is mixed into the air internal circulation, so that the air in the conveying chamber is polluted, the pipeline is polluted, and the air conditioner outdoor unit is located outdoors, so that the air inlet communicated with the outside air by the air conditioner outdoor unit is difficult to clean manually. Therefore, in order to solve the technical problems, the merchants add technical bidding to add a set of air purification system to purify the air.

In the technical bidding process, some merchants developing air purification systems adopt the following scheme, and the air purification system is arranged at an indoor air outlet (namely, the fresh air purification equipment is independently installed indoors), so that the air entering the room from the indoor air outlet is clean, but the scheme cannot solve the problem that an air inlet for communicating the air conditioner outdoor unit with the outside air is blocked, namely, the air entering the air conditioner from the outside cannot be purified, and therefore, the pipeline still has a pollution phenomenon along with long-time use. The technical scheme of the applicant is distinguished in the technical bid and is adopted by the traders, so that the patent is applied to the national intellectual property office.

Disclosure of Invention

The invention aims to provide a system capable of internally and externally circulating, disinfecting, sterilizing and purifying fresh air, which solves the technical problems that the outside fresh air cannot be purified in the prior art so as to pollute and block pipelines after the outside fresh air is mixed with an air internal circulation channel, does not need to independently install fresh air purifying equipment indoors, and saves a large amount of cost. And the functions of refrigeration, fresh air, purification and disinfection are solved for the air conditioner, the air conditioner is provided with the disinfection function, and the defects in the prior art are overcome.

The system comprises outdoor equipment for conveying cold air or warm air indoors, an air inlet of the outdoor equipment is connected with an indoor air inlet pipe through an air inlet pipeline, an air outlet of the outdoor equipment is connected with an indoor air outlet pipe through an air outlet pipeline, a purification module for filtering and purifying air is arranged between the air inlet pipeline and the air inlet pipe, a ventilation part for allowing outside fresh air to enter is further arranged between the air inlet pipeline and the air inlet pipe, an electric or pneumatic opening and closing valve body is arranged at the ventilation part, the fresh air entering the ventilation part is communicated with the purification module under the opening state of the valve body, and an air inlet communicated with the outside is cancelled to be formed in an air conditioner outdoor unit. The place setting that the new trend got into is between intake stack and intake stack, and be equipped with between intake stack and the intake stack and purify the module, just so just can be before the air intake of air admission air condensing units, ensure that the air all through purifying, the air reentrants air condensing units after purifying, then carry to indoor again, the pipeline does not receive the pollution, it is clean and tidy, and the air in the delivery chamber all is clean, in opening the air extrinsic cycle mode, the pipeline also can not receive the pollution, the wind gap also can not be plugged up, effectively solve the difficult problem in the background art, open the air extrinsic cycle mode promptly, the pipeline receives the pollution, the wind gap receives the problem of plugging up.

The air inlet pipe is arranged in a cavity of an indoor wall, a protective cover for covering the purification module is further arranged between the air inlet pipe and the air inlet pipe, the protective cover plays a role in protecting the purification module, the protective cover is made of metal materials and prevents plastic pieces in the purification module from aging, an external air inlet is formed in the protective cover, and the system further comprises a valve for opening or closing the external air inlet; when the valve is in a closed state, the air inlet pipe, the air inlet pipeline, the air inlet, the air outlet pipeline and the air outlet pipe are sequentially communicated to form a flow channel for internal circulation of air; when the valve is in an open state, the air inlet pipe and the external air inlet are respectively communicated with the air inlet pipeline, and the air inlet pipe, the air outlet pipeline and the air outlet pipeline form a flow channel for external circulation of air. The valve is electrically opened, and is opened or closed through the operation of a remote controller, so that a user can select an air internal circulation mode or an air external circulation mode.

One side of the protective cover is attached to the outer side of the indoor wall, and a sealing gasket is arranged between the protective cover and the outer side of the indoor wall; under the valve closed state, form a airtight cavity between the outside of protection casing, indoor wall, ensure in the air inner loop mode, the air can not outwards reveal.

It purifies in the plug-type entering air-supply line of module, it purifies the module and washs to be convenient for the user from the air-supply line extraction, moreover tear out and purify the module after, because the air purification stage all is gone on this air-supply line, and the air of air-supply line back end is all clean, so the air pipe of air-supply line back end does not need how to wash, tear out and purify the module after, at this moment the user can use the brush to stretch into the air-supply line, the protection casing, to the air-supply line, the external air intake of protection casing, first filter plate washs, it is difficult to wash the external air intake that is located outdoors to solve the manpower.

Be equipped with the wind channel of connecting the intake stack on the protection casing and connect, purify and be equipped with between module and the wind channel joint and form the installation and prevent slow-witted location structure, set up the installation and prevent slow-witted location structure, after the user of being convenient for tears out the purification module, the user can only carry out according to the direction that the installation was set for and will purify the module and install correctly.

Still be equipped with first elasticity lock structure between purification module and the wind channel joint, the purification module is connected with the wind channel joint dismantlement formula through first elasticity lock structure, and convenient to use user dismantles the purification module, then purifies the module from the air-supply line extraction.

The purifying module comprises a shell, a filter element layer, a buckling cover, a positive plate, a positioning plate, a plurality of static electricity tubes, a negative plate and a bottom cover, wherein the filter element layer is positioned between the shell and the buckling cover; the filter element layer has a filtering effect on air, and the positive plate, the negative plate and the static cylinder generate an electromagnetic field to purify the air under the electrification.

A second elastic buckling structure is arranged between the shell and the buckling cover, and the shell and the buckling cover are detachably connected through the second elastic buckling structure; a clamping structure is arranged between the buckling cover and the bottom cover, and the buckling cover is connected with the bottom cover through the clamping structure; adopt and dismantle connection structure, the user of being convenient for washs the purification module.

The positioning structure for forming installation fool-proofing comprises a positioning groove arranged on the bottom cover and a boss arranged on the air duct joint, and the boss is limited on the positioning groove in an installation state; after the purification module is detached by a user, the purification module can be correctly installed in situ.

Or, be equipped with between lock lid, the bottom of purification module and collect board district, a plurality of anion module, collect the collection chamber that the board district was equipped with the protruding setting of a plurality of, every anion module includes the current conducting plate, sets up the anion utmost point on the current conducting plate, and the anion is extremely spacing under the installation condition and is collecting the intracavity. The anion module disinfects the air, and the collection cavity can collect pollutants in the air, such as dust.

Be equipped with the handle on the shell, be equipped with location installation sign on the handle, the user takes out purification module through the handle, and purification module installation to former department when needs, the user can observe location installation sign, according to location installation sign, will purify the module installation to former department.

A plurality of bulges are arranged in the collecting cavity at intervals along the inner wall of the collecting cavity, and the contact area of air is increased by the bulges, so that the area for collecting air pollutants is increased; the negative ion electrode is in a carbon brush type or a needle point type.

The purification module further comprises two electrode connecting pieces, a contact is arranged on the air channel joint corresponding to each electrode connecting piece, each electrode connecting piece is in contact with the corresponding contact in the installation state, an electric control wiring board and a wiring board are further arranged on the air channel joint, a threading hole is formed between the protective cover and the air channel joint, and a wiring harness enters the air channel joint along the threading hole and is electrically connected with the contacts, the electric control wiring board and the wiring board. The wire harness may be a wire harness of a control panel on an outdoor unit of an air conditioner. When the purification module is pushed into the air inlet pipe and buckled with the air duct joint, the electrode connecting sheet is contacted with the corresponding contact, so that the positive electrode plate, the negative electrode plate and the static cylinder can be electrified; or to energize the negative ion module.

The shell is provided with a plurality of ventilation grooves, and an external air inlet of the protective cover is provided with a first filter screen plate which can block dust of external air (fresh air) and prevent mice from entering an air pipeline; the external air inlet is communicated with the ventilation groove in a valve opening state, external air (fresh air) is purified from the ventilation groove to the inside of the purification module and then flows to the air inlet of the air conditioner outdoor unit, the bottom of the external air inlet is provided with a box body for installing a valve, and the valve is arranged on the box body in a sliding or rotating mode; the outside of box body is equipped with the motor that promotes or drive valve pivoted, and the outside of box body still is equipped with the motor cover of cladding motor.

A purification module is arranged between the air outlet pipeline and the air outlet pipe, the air inlet part of the air inlet pipe and the air outlet part of the air outlet pipe are both provided with a cover body, the cover body is provided with a second filter screen plate, the second filter screen plate can block dust in the air and also can prevent mice from entering the air pipeline, and the air inlet part of the air inlet pipe and the air outlet part of the air outlet pipe are detachably connected with the cover body; the air outlet pipe is arranged in a cavity of the indoor wall; or the air outlet pipe is arranged on the indoor ceiling.

The invention has the following beneficial effects:

the place setting that the new trend got into is between intake stack and air-supply line, and be equipped with between intake stack and the intake stack and purify the module, just so just can be before the air intake of air admission air condensing units, ensure that the air all through purifying, the air is through purifying the back reentrant air condensing units, then carry to indoor again, the pipeline does not receive the pollution, clean and tidy, and the air in the delivery chamber all is clean, in opening the air extrinsic cycle mode, the pipeline also can not receive the pollution, the wind gap also can not be plugged up, effectively solve the difficult problem in the background art.

The valve is electrically opened, and is opened or closed through the operation of a remote controller, so that a user can select an air internal circulation mode or an air external circulation mode.

It is intraductal to purify the plug-type entering air-supply line of module, it purifies the module and washs to be convenient for the user from the air-supply line extraction, and tear purification module back off, because the air purification stage all is gone on this air-supply line, and the air of air-supply line back end is all clean, so the air pipe of air-supply line back end need not wash, tear purification module back off, at this moment the user can use the brush to stretch into the air-supply line, the protection casing, to the air-supply line, the external air intake of protection casing, first filter plate washs, can the manual work go clean new trend air intake (external air intake), external air intake need not dismantle, the maintenance and the use have been made things convenient for greatly, it is difficult to wash the external air intake that is located outdoors to solve the manpower.

Fresh air purification equipment does not need to be installed indoors independently, and a large amount of cost is saved. The air conditioner has the advantages that the functions of refrigeration, fresh air, purification and disinfection are achieved, and the air conditioner is provided with the disinfection function.

Drawings

Fig. 1 is a schematic structural diagram of a purification system according to an embodiment of the present invention.

Fig. 2 is a schematic view of an air external circulation structure of the purification system according to an embodiment of the present invention.

Fig. 3 is a schematic view of an air internal circulation structure of the purification system according to an embodiment of the present invention.

Fig. 4 is an enlarged view of a portion a in fig. 2.

Fig. 5 is an enlarged view of fig. 3 at B.

FIG. 6 is an assembled exploded cross-sectional view of a purification system according to an embodiment of the present invention.

Fig. 7 is an assembled and exploded perspective view of a purification system according to an embodiment of the present invention.

Fig. 8 is a schematic structural diagram of a purification module according to an embodiment of the present invention.

Fig. 9 is a schematic structural diagram of a protective cover according to an embodiment of the invention.

Fig. 10 is an exploded view of the purification module according to an embodiment of the present invention.

Fig. 11 is a schematic structural diagram of a housing according to an embodiment of the invention.

Fig. 12 is a schematic view of an assembly structure of the housing and the air duct joint according to an embodiment of the invention.

Fig. 13 is a schematic view of a structure of anion purification in the purification module according to an embodiment of the present invention.

Fig. 14 is a schematic view of an assembled and disassembled structure of the negative ion purification module according to an embodiment of the present invention.

Fig. 15 is a schematic structural diagram of a conductive plate and a negative ion electrode according to an embodiment of the invention.

Fig. 16 is a schematic structural diagram of a collecting plate region according to an embodiment of the present invention.

Fig. 17 is a schematic view of a valve opening structure according to an embodiment of the invention.

Detailed Description

The invention is further described with reference to the following figures and examples.

Referring to fig. 1-17, a system for purifying fresh air capable of internal and external circulation sterilization and disinfection comprises an outdoor device 1 for conveying cold air or warm air indoors, an air inlet 2 of the outdoor device 1 is connected with an indoor air inlet pipe 3 through an air inlet pipe 6, an air outlet 4 of the outdoor device 1 is connected with an indoor air outlet pipe 5 through an air outlet pipe 7, a purification module 8 for filtering and purifying air is arranged between the air inlet pipe 6 and the air inlet pipe 3, a ventilation part for allowing external fresh air to enter is arranged between the air inlet pipe 6 and the air inlet pipe 3, an electric or pneumatic opening and closing valve body is arranged on the ventilation part, and the fresh air entering the ventilation part is communicated with the purification module 8 in an opening state of the valve body.

The air inlet pipe 3 is arranged in a cavity of an indoor wall 9, a protective cover 10 for covering the purification module 8 is further arranged between the air inlet pipe 6 and the air inlet pipe 3, an external air inlet 12 is arranged on the protective cover 10, and the system further comprises a valve 11 for opening or closing the external air inlet 12; when the valve 11 is in a closed state, the air inlet pipe 3, the air inlet pipeline 6, the air inlet 2, the air outlet 4, the air outlet pipeline 7 and the air outlet pipe 5 are sequentially communicated to form a flow channel for internal circulation of air; when the valve 11 is in an open state, the air inlet pipe 3 and the external air inlet 12 are respectively communicated with the air inlet pipeline 6, and the air inlet pipe 3, the external air inlet 12, the air outlet pipeline 4, the air outlet pipeline 7 and the air outlet pipe 5 form a flow channel for external circulation of air.

In the embodiment, the outside air inlet 12 is disposed on the bottom surface of the protection cover 10, and the protection cover 10 is provided with a normal screen corresponding to the outside air inlet 12 to prevent water and snow from entering the outdoor environment and prevent rats and the like. In addition, the outside air inlet 12 may also be disposed on the side surface or the top surface of the protection cover 10, as long as protection is achieved.

One side of the protective cover 10 is attached to the outer side of the indoor wall 9, and a sealing gasket 13 is arranged between the protective cover 10 and the outer side of the indoor wall 9; in the closed state of the valve 11, a closed cavity is formed between the protective cover 10 and the outer side of the indoor wall 9.

In this embodiment, a channel is provided on the indoor wall 9, and the air inlet pipe 3 or the air outlet pipe 5 is embedded in the channel.

In purifying module 8 plug-type entering air-supply line 3, be equipped with the wind channel joint 14 of connecting air-supply line 6 on the protection casing 10, purify and be equipped with between module 8 and the wind channel joint 14 and form the installation and prevent slow-witted location structure, purify and still be equipped with first elasticity lock structure between module 8 and the wind channel joint 14, purify module 8 and connect 14 dismantlement formula with the wind channel through first elasticity lock structure and be connected.

Purify module 8 and include shell 15, filter element layer 16, lock lid 17, positive plate 18, locating plate 19, a plurality of static section of thick bamboo 20, negative plate 21, bottom 22, filter element layer 16 is located shell 15, between the lock lid 17, be equipped with limit structure between positive plate 18 and the locating plate 19, positive plate 18 passes through limit structure spacing on locating plate 19, be equipped with a plurality of through-hole on the negative plate 21, a plurality of static section of thick bamboo 20 corresponds and inserts in a plurality of through-hole, and 20 one-to-one of a plurality of sharp utmost point and a plurality of static section of thick bamboo on the positive plate 18.

In this embodiment, the housing 15 is a hollow structure, the first elastic fastening structure includes a first fastening hole disposed on the housing 15 and a first fastening disposed on the air duct joint 14, and the first fastening hole and the first fastening are fastened when the air duct joint 14 and the housing 15 are assembled.

In this embodiment, the fastening cover 17, the positioning plate 19, and the bottom cover 22 are all provided with a plurality of ventilation holes.

In this embodiment, the limiting structure includes a positioning hole disposed on the positioning plate 19 and a positioning column disposed on the positive plate 18, and the positioning column is inserted into the positioning hole when the positioning plate 19 and the positive plate 18 are assembled.

A second elastic buckling structure is arranged between the shell 15 and the buckling cover 17, and the shell 15 and the buckling cover 17 are detachably connected through the second elastic buckling structure; a clamping structure is arranged between the buckling cover 17 and the bottom cover 22, and the buckling cover 17 is connected with the bottom cover 22 through the clamping structure.

In this embodiment, the second elastic fastening structure includes a second fastening hole disposed on the housing 15 and a second fastening disposed on the fastening cover 17, and the second fastening hole is fastened with the second fastening when the housing 15 and the fastening cover 17 are assembled.

The positioning structure for mounting fool-proofing comprises a positioning groove 22.1 arranged on the bottom cover 22 and a boss 14.1 arranged on the air duct joint 14, wherein the boss 14.1 is limited on the positioning groove 22.1 in a mounting state. If the user makes a mistake, the boss 14.1 will be pressed against the bottom cover 22.

Or, be equipped with between the lock lid 17 of purification module 8, the bottom 22 and collect board district 23, a plurality of anion module 24, collect board district 23 and be equipped with the protruding collection chamber 23.1 that sets up of a plurality of, every anion module 24 includes the conducting plate 25, sets up the negative ion utmost point 26 on the conducting plate 25, and the negative ion utmost point 26 is spacing in collection chamber 23.1 under the mounted state.

The shell 15 is provided with a handle 15.1, and the handle 15.1 is provided with a positioning and mounting mark.

In this embodiment, the positioning installation mark is a guide mark with an arrow facing upward.

In this embodiment, a bayonet is disposed on the periphery of the collecting plate area 23, a bump is disposed on the inner wall of the bottom cover 22, the collecting plate area 23 is assembled with the bottom cover 22 in such a way that the bump is embedded into the bayonet, a screw hole is disposed on the collecting plate area 23, a stud is disposed on the bottom cover 22, the screw hole and the stud are fixedly connected through a screw, and the same is also applicable to the fixing manner of the negative plate 21 and the bottom cover 22.

A plurality of bulges 23.2 are arranged in the collecting cavity 23.1, and the bulges 23.2 are arranged at intervals along the inner wall of the collecting cavity 23.1; the negative ion electrode 26 is in a carbon brush type or a needle point type.

The purification module 8 further comprises two electrode connecting sheets 27, a contact 28 is arranged on the air duct joint 14 corresponding to each electrode connecting sheet 27, each electrode connecting sheet 27 is in contact with the corresponding contact 28 in the installation state, an electric control 29 and a wiring board 30 are further arranged on the air duct joint 14, a threading hole is formed between the protective cover 10 and the air duct joint 14, and a wire harness enters the air duct joint 14 along the threading hole and is electrically connected with the contacts 28, the electric control 29 and the wiring board 30.

In this embodiment, the protective cover 10 is provided with an opening, the air duct joint 14 is in a step-shaped structure, the air duct joint 14 is inserted into the opening, and a step surface of the air duct joint 14 covers the opening, and the step surface is attached to the peripheral wall surface of the opening of the protective cover 10 to form a seal; the air duct joint 14 is provided with a pressing sheet for pressing the contact 28, the air duct joint 14 is also provided with a clamping block for clamping the electric control 29 and the wiring board 30, and the shape of the protective cover 10 can be round, square or any polygon.

The shell 15 is provided with a plurality of ventilation grooves 15.2, and the outside air inlet 12 of the protective cover 10 is provided with a first filter screen plate 31; the external air inlet 12 is communicated with the ventilation groove 15.2 when the valve 11 is opened, a box body 32 for installing the valve 11 is arranged at the bottom of the external air inlet 12, and the valve 11 is arranged on the box body 32 in a sliding or rotating mode; the outer side of the box body 32 is provided with a motor 33 for pushing or driving the valve 11 to rotate, and the outer side of the box body 32 is also provided with a motor cover 34 for covering the motor 33.

In this embodiment, the valve 11 is provided with a rotating shaft connected to a motor shaft of the motor 33, and the motor 33 drives the valve 11 to rotate to open or close the external air inlet 12. Or the motor 33 is provided with an electric push rod, and the electric push rod drives the valve 11 to open or close the external air inlet 12 in a sliding manner.

In this embodiment, the box 32 is fixedly connected to the bottom of the protection cover 10 by screws.

A purification module 8 is arranged between the air outlet pipeline 7 and the air outlet pipe 5, a cover body 37 is arranged at the air inlet position of the air inlet pipe 3 and the air outlet position of the air outlet pipe 5, a second filter screen plate 35 is arranged on the cover body 37, and the air inlet position of the air inlet pipe 3 and the air outlet position of the air outlet pipe 5 are detachably connected with the cover body 37; the air outlet pipe 5 is arranged in a cavity of the indoor wall 9; alternatively, the outlet duct 5 is provided on the ceiling 36 of the room.

The air conditioner evaporator adsorbs particulate matter in the air passing through it in comparison as follows:

and (3) testing items: PM2.5 adsorption; and (3) testing conditions are as follows: the tested PM2.5 average concentration was 300ug/m3, the evaporator was of the order of 1.5 mesh, the tubing was 6 cm in diameter by 1 meter long at 24 ℃ and 51%

According to the data, the average removal rate (air purification rate) of the system capable of internally and externally circulating, disinfecting, sterilizing and purifying fresh air is 93% within 576 hours.

The foregoing is a preferred embodiment of the present invention, and the basic principles, principal features and advantages of the invention are shown and described. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and the invention is intended to be protected by the following claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a but system that inside and outside circulation disinfection new trend purified, includes to indoor outdoor equipment (1) of carrying cold wind or warm braw, indoor air-supply line (3) are connected through air-supply line (6) in air intake (2) of outdoor equipment (1), and indoor play tuber pipe (5), its characterized in that are connected through air-out pipeline (7) in air outlet (4) of outdoor equipment (1): be equipped with between air-supply line (6) and air-supply line (3) and carry out filtration purification's purification module (8) to the air, still be equipped with the ventilation department that lets external new trend get into between air-supply line (6) and air-supply line (3), be equipped with the electronic or pneumatic valve body that opens and shuts on this ventilation department, the new trend that gets into this ventilation department communicates under the valve body open mode and purifies module (8).

2. The system for sterilizing, fresh air purifying by internal and external circulation as claimed in claim 1, wherein: the air inlet pipe (3) is arranged in a cavity of an indoor wall (9), a protective cover (10) for covering the purification module (8) is arranged between the air inlet pipe (6) and the air inlet pipe (3), an external air inlet (12) is arranged on the protective cover (10), and the system further comprises a valve (11) for opening or closing the external air inlet (12); when the valve (11) is in a closed state, the air inlet pipe (3), the air inlet pipeline (6), the air inlet (2), the air outlet (4), the air outlet pipeline (7) and the air outlet pipe (5) are sequentially communicated to form a flow channel for internal circulation of air; when the valve (11) is in an open state, the air inlet pipe (3) and the external air inlet (12) are respectively communicated with the air inlet pipeline (6), and the air inlet pipe, the air outlet pipeline (2), the air outlet pipeline (4), the air outlet pipeline (7) and the air outlet pipe (5) form a flow channel for external circulation of air.

3. The system for sterilizing, fresh air purifying by internal and external circulation as claimed in claim 2, wherein: one side of the protective cover (10) is attached to the outer side of the indoor wall (9), and a sealing gasket (13) is arranged between the protective cover (10) and the outer side of the indoor wall (9); when the valve (11) is closed, a closed cavity is formed between the protective cover (10) and the outer side of the indoor wall (9).

4. The system for sterilizing, fresh air purifying by internal and external circulation as claimed in claim 3, wherein: purify in module (8) plug-type entering air-supply line (3), be equipped with the wind channel of connecting air-supply line (6) on protection casing (10) and connect (14), purify and be equipped with between module (8) and wind channel joint (14) and form the installation and prevent the location structure of slow-witted, purify and still be equipped with first elasticity lock structure between module (8) and wind channel joint (14), purify module (8) and connect (14) dismantlement formula with the wind channel through first elasticity lock structure and be connected.

5. The system for sterilizing, disinfecting and purifying fresh air by internal and external circulation as claimed in claim 4, characterized in that: the purification module (8) comprises a shell (15), a filter element layer (16), a buckling cover (17), a positive plate (18), a positioning plate (19), a plurality of static electric tubes (20), a negative plate (21) and a bottom cover (22), wherein the filter element layer (16) is positioned between the shell (15) and the buckling cover (17), a limiting structure is arranged between the positive plate (18) and the positioning plate (19), the positive plate (18) is limited on the positioning plate (19) through the limiting structure, a plurality of through holes are formed in the negative plate (21), the plurality of static electric tubes (20) are correspondingly inserted into the plurality of through holes, and a plurality of sharp poles on the positive plate (18) correspond to the plurality of static electric tubes (20) one by one;

a second elastic buckling structure is arranged between the shell (15) and the buckling cover (17), and the shell (15) and the buckling cover (17) are detachably connected through the second elastic buckling structure; a clamping structure is arranged between the buckling cover (17) and the bottom cover (22), and the buckling cover (17) is connected with the bottom cover (22) through the clamping structure;

the positioning structure forming installation fool-proofing comprises a positioning groove (22.1) arranged on the bottom cover (22) and a boss (14.1) arranged on the air duct joint (14), and the boss (14.1) is limited on the positioning groove (22.1) in an installation state;

or, be equipped with between lock lid (17), the bottom (22) of purification module (8) and collect board district (23), a plurality of anion module (24), collect board district (23) and be equipped with collection chamber (23.1) that a plurality of is protruding to be set up, every anion module (24) are including current-conducting plate (25), set up anion utmost point (26) on current-conducting plate (25), and anion utmost point (26) are spacing in collection chamber (23.1) under the mounted state.

6. The system for sterilizing, fresh air purifying by internal and external circulation as claimed in claim 5, wherein: a handle (15.1) is arranged on the shell (15), and a positioning installation mark is arranged on the handle (15.1).

7. The system for sterilizing, fresh air purifying by internal and external circulation as claimed in claim 5, wherein: a plurality of bulges (23.2) are arranged in the collecting cavity (23.1), and the bulges (23.2) are arranged at intervals along the inner wall of the collecting cavity (23.1); the negative ion electrode (26) is in a carbon brush type or a needle point type.

8. The system for sterilizing, fresh air purifying by internal and external circulation as claimed in claim 5, wherein: purification module (8) still includes two electrode connection pieces (27), it is equipped with contact (28) to correspond every electrode connection piece (27) on wind channel joint (14), every electrode connection piece (27) contact with corresponding contact (28) under the mounted state, still be equipped with automatically controlled (29) on wind channel joint (14), wiring board (30), protection casing (10), be equipped with the through wires hole between wind channel joint (14), the pencil along the through wires hole get into wind channel joint (14) in and with contact (28), automatically controlled (29), wiring board (30) electric connection.

9. The system for sterilizing, fresh air purifying by internal and external circulation as claimed in claim 5, wherein: a plurality of ventilation grooves (15.2) are arranged on the shell (15), and a first filter screen plate (31) is arranged on an external air inlet (12) of the protective cover (10); the external air inlet (12) is communicated with the ventilation groove (15.2) in the opening state of the valve (11), a box body (32) for installing the valve (11) is arranged at the bottom of the external air inlet (12), and the valve (11) is arranged on the box body (32) in a sliding or rotating mode; the outer side of the box body (32) is provided with a motor (33) for pushing or driving the valve (11) to rotate, and the outer side of the box body (32) is also provided with a motor cover (34) for covering the motor (33).

10. The system for sterilizing, fresh air purifying by internal and external circulation as claimed in claim 9, wherein: a purification module (8) is arranged between the air outlet pipeline (7) and the air outlet pipe (5), the air inlet position of the air inlet pipe (3) and the air outlet position of the air outlet pipe (5) are both provided with a cover body (37), the cover body (37) is provided with a second filter screen plate (35), and the air inlet position of the air inlet pipe (3) and the air outlet position of the air outlet pipe (5) are both detachably connected with the cover body (37); the air outlet pipe (5) is arranged in a cavity of the indoor wall (9); or the air outlet pipe (5) is arranged on an indoor ceiling (36).