CN212339454U

CN212339454U - Fresh air system

Info

Publication number: CN212339454U
Application number: CN202022084377.3U
Authority: CN
Inventors: 黄开心
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2021-01-12
Anticipated expiration: 2030-09-21

Abstract

The utility model discloses a new trend system, it includes first tuber pipe, electrostatic precipitator unit and anion generating unit, the export of electrostatic precipitator unit communicates in anion generating unit's entry through first tuber pipe, anion generating unit has the inner chamber with the entry intercommunication, anion generating unit is including spraying the subassembly, it sets up in the inner chamber to spray the subassembly, it is used for toward the inner chamber water spray to spray the subassembly, the ozone that electrostatic precipitator unit produced is carried to the inner chamber through first tuber pipe, cross in the inner chamber including spraying subassembly spun water, it is used for getting rid of ozone to spray subassembly spun water. This new trend system's electrostatic precipitator unit and anion generating unit communicate through first tuber pipe for ozone that the electrostatic precipitator unit produced is got rid of through locating the subassembly spun water that sprays in the anion generating unit when the inner chamber of anion generating unit flows through, eliminates ozone to people's influence, and water has still washd the air simultaneously, and human impression is good.

Description

Fresh air system

Technical Field

The utility model relates to a new trend system.

Background

At present, the existing novel fan has two dust removal modes. One is to adopt a filter screen for dust removal, and the filter screen generally adopts one or a combination of more of PP cotton, active carbon and HEPA. The filter screen dust removal mode can lead to fast consumption of the filter screen, the filter screen needs to be replaced in time, the operation is complex, and secondary air pollution can be caused if the filter screen is not replaced for a long time. The other is an electrostatic dust collection mode, which does not need to replace a filter screen, but can release ozone in the electrostatic dust collection process, and can affect the human health.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a new trend system in order to overcome the new trend system release ozone among the prior art, influence user experience's defect.

The utility model discloses an above-mentioned technical problem is solved through following technical scheme:

the utility model provides a fresh air system, its includes first tuber pipe, electrostatic precipitator unit and anion generating unit, the export of electrostatic precipitator unit is passed through first tuber pipe communicate in anion generating unit's entry, anion generating unit have with the inner chamber of entry intercommunication, anion generating unit is including spraying the subassembly, spraying the subassembly set up in the inner chamber, spraying the subassembly be used for toward the inner chamber water spray, the ozone that electrostatic precipitator unit produced passes through first tuber pipe is carried extremely the inner chamber, with spraying subassembly spun water is in the inner chamber intersects, spraying subassembly spun water is used for getting rid of ozone.

In this scheme, this new trend system's electrostatic precipitator unit and anion generating unit communicate through first tuber pipe for ozone that the electrostatic precipitator unit produced is got rid of through the subassembly spun water that sprays who locates in the anion generating unit when the inner chamber of anion generating unit flows through, eliminates ozone to people's influence, and water has still washd the air, makes the air after purifying have moderate humidity. Simultaneously in the in-process that removes ozone, the wall of inner chamber is hit to water, makes rivers produce a large amount of negative oxygen ions through physical excitation for the new trend after the negative ion generating unit does not have the influence of ozone, still has negative oxygen ion, and human impression is good.

Preferably, the negative ion generating unit and the electrostatic dust removing unit are arranged from top to bottom in sequence.

In this scheme, anion generating unit sets up in the top of electrostatic precipitator unit, makes the negative ion generating unit of the air-discharge of the electrostatic precipitator unit of low department to the eminence, and the air is arranged from low department toward the eminence, forms the siphon effect, can inhale more air, does benefit to and airs exhaust. Meanwhile, the anion generating unit and the electrostatic dust removal unit can be stacked from top to bottom, so that the volume of the fresh air system can be reduced, and the miniaturized fresh air system is facilitated.

Preferably, the first air duct comprises a vertical section and a transverse section which are connected in sequence, the vertical section is communicated with an outlet of the electrostatic dust removal unit, and the transverse section is communicated with an inlet of the negative ion generation unit;

wherein the lateral section is inclined downward in a direction toward the negative ion generating unit.

In this scheme, the horizontal section that the slope set up downwards can be with the water log raft that gets into in first tuber pipe to anion generating element's inner chamber, avoids water to get into the electrostatic precipitator unit through first tuber pipe.

Preferably, the inlet of the negative ion generating unit is arranged on the side wall of the inner cavity, and the outlet of the negative ion generating unit is arranged at the top of the inner cavity.

In this scheme, the setting of anion generating unit's entry can avoid water to get into first tuber pipe at the lateral wall. The outlet of the anion generating unit is arranged at the top, so that the inlet is lower than the outlet, and the siphon effect is convenient for air exhaust.

Preferably, the fresh air system further comprises a second air pipe, the second air pipe comprises at least one bend, one end of the second air pipe is communicated with an outlet of the negative ion generating unit, and the other end of the second air pipe is used for being communicated with the indoor space.

In this scheme, the second tuber pipe changes the flow direction of wind through bending, makes the inner wall contact of wind and second tuber pipe, and then with the inner chamber of unnecessary vapor condensation backward flow to anion generating unit in the wind to reduce the humidity in the wind.

Preferably, the water sprayed by the spraying assembly forms a water curtain which closes the inner cavity along the direction perpendicular to the flowing direction of the wind.

In this scheme, the water curtain is used for sealing the inner chamber, increases the area of contact of wind and water, improves the clearance of ozone, prevents that ozone from spilling from the clearance of rivers.

Preferably, the negative ion generating unit further comprises a water outlet, and the water outlet is arranged at the bottom of the inner cavity.

In this scheme, the water accessible delivery port of dissolving ozone discharges fast, avoids the inner chamber to produce ponding, and then flows into the electrostatic precipitator unit.

Preferably, the fresh air system further comprises a water circulation device, the water circulation device comprises a water pump, a water purification unit and a water storage tank, the water pump, the water purification unit and the water storage tank are sequentially arranged from top to bottom, an inlet of the water purification unit is communicated with the water outlet, an outlet of the water purification unit is communicated with the water storage tank, and the water pump is used for pumping the spraying assembly through the water storage tank.

In this scheme, the water that flows out from anion generating unit is through storing in the storage water tank after purifying by the water purification unit, then utilizes the water pump to pump water for spraying the subassembly. Because the air can take away some water yield, in order to keep having sufficient water in the storage water tank, the water purification unit still communicates with outside water source, when the water level in the storage water tank is less than the settlement water level, still can be through intelligent control's mode toward the moisturizing in the storage water tank. But the new trend system passes through water circle device cyclic utilization water, need not additionally to consume more water resources. And each unit is arranged from top to bottom, so that the volume of the fresh air system can be reduced, and the miniaturization of the fresh air system is facilitated.

Preferably, the fresh air system further comprises a fan, and the fan is installed on the air path between the electrostatic dust removal unit and the negative ion generation unit and used for supplying air into the negative ion generation unit.

In the scheme, the fan accelerates the flow of wind, and the air purification amount of the fresh air system is improved.

Preferably, the fresh air system further comprises a filter screen, and the filter screen is arranged on the air path between the electrostatic dust removal unit and the fan.

In this scheme, be provided with the material and the air filter layer that remove ozone in the filter screen, can partly get rid of the ozone that produces in electrostatic precipitator, filter the air simultaneously, improve the cleanliness factor of air.

Preferably, the spraying assembly comprises a spray head and a water pump, the spray head is arranged on the wall surface of the inner cavity, and the water pump is communicated to the spray head through a pipeline.

In this scheme, the pressure of the water of water pump adjustable delivery for the shower nozzle, the size and the direction of the adjustable spun rivers of shower nozzle to cover wideer and wider scope in the inner chamber.

On the basis of the common knowledge in the field, the above preferred conditions can be combined at will to obtain the preferred embodiments of the present invention.

The utility model discloses an actively advance the effect and lie in: this new trend system's electrostatic precipitator unit and anion generating unit communicate through first tuber pipe for ozone that the electrostatic precipitator unit produced gets rid of through the subassembly spun water that sprays who locates in the anion generating unit when the inner chamber of anion generating unit flows through, eliminates ozone to people's influence, and water has still washd the air, makes the air after purifying cleaner and has moderate humidity. Simultaneously in the in-process that removes ozone, the wall of inner chamber is hit to water, makes rivers produce a large amount of negative oxygen ions through physical excitation for wind behind the negative ion generating unit does not have the influence of ozone, still has negative oxygen ion, and human impression is good.

Drawings

Fig. 1 is an external structural diagram of a first view angle of the fresh air system in embodiment 1.

Fig. 2 is an external structural diagram of a second viewing angle of the fresh air system in embodiment 1.

Fig. 3 is a schematic view of the third view angle of the fresh air system in embodiment 1.

Fig. 4 is an internal structural diagram of a fourth viewing angle of the fresh air system in embodiment 1.

Fig. 5 is a schematic structural view of the negative ion generating unit of embodiment 1.

Fig. 6 is a schematic view of the internal structure of the negative ion generating unit of embodiment 1.

Fig. 7 is a schematic structural view of the first duct of embodiment 1.

Fig. 8 is a schematic structural view of a spray assembly of embodiment 2.

Description of reference numerals:

a first air duct 1, a vertical section 1a, and a transverse section 1b

Electrostatic dust removal unit 2

Negative ion generating unit 3, inlet 3a, outlet 3b

Cylinder 31

Limit bump 311

Water outlet 32

Air inlet duct 33

Top baffle 34

Eaves 341

Drainage opening 342

Diversion trench 343

Bottom plate 35

Sound deadening layer 36

Spray assembly 37

Spray head 371

Water pump 372

Second air duct 4

Fan 5

Purified water unit 6

Water tank 7

Filter screen 8

Motor 101

Turntable 102

Support member 103

Pipe 10

Fresh air system air inlet 20

Fresh air system air outlet 30

Wind flow direction 40

Detailed Description

The present invention will be more clearly and completely described below by way of examples and with reference to the accompanying drawings, but the present invention is not limited thereto.

Example 1

As shown in fig. 1-7, the present embodiment discloses a fresh air system, which includes a first air duct 1, an electrostatic dust removal unit 2, and a negative ion generation unit 3. The outlet of the electrostatic dust collection unit 2 is communicated with the inlet 3a of the negative ion generation unit 3 through the first air pipe 1, and the negative ion generation unit 3 is provided with an inner cavity communicated with the inlet 3 a. Anion generating unit 3 includes sprays subassembly 37, sprays subassembly 37 and sets up in the inner chamber, sprays subassembly 37 and is used for spraying water toward anion generating unit 3's inner chamber. Ozone generated by the electrostatic dust collection unit 2 is conveyed to the inner cavity of the negative ion generation unit 3 through the first air pipe 1, and is intersected with water sprayed by the spraying assembly 37 in the inner cavity of the negative ion generation unit 3. The water sprayed from the spray assembly 37 is used to remove ozone.

This new trend system's electrostatic precipitator unit 2 and anion generating unit 3 are through first tuber pipe 1 intercommunication for the ozone that electrostatic precipitator unit 2 produced is when the inner chamber of anion generating unit 3 of flowing through, gets rid of through the water that sprays 37 spun of locating in the anion generating unit 3, eliminates ozone to people's influence, and water has still washd the air, makes the air after the purification cleaner and has moderate humidity. Simultaneously in the in-process that removes ozone, the wall of inner chamber is hit to water, makes rivers produce a large amount of negative oxygen ions through physical excitation for wind behind the negative ion generating unit 3 does not have the influence of ozone, still has negative oxygen ion, and the human body feels good.

Preferably, the negative ion generating unit 3 and the electrostatic dust removing unit 2 are sequentially arranged from top to bottom, so that air exhausted by the electrostatic dust removing unit 2 at a lower position is exhausted to the negative ion generating unit 3 at a higher position, and air is exhausted from the lower position to the higher position, a siphon effect is formed, more air can be inhaled, and air exhaust is facilitated. Meanwhile, the anion generating unit 3 and the electrostatic dust removal unit 2 can be stacked from top to bottom, the volume of the fresh air system can be reduced, and the miniaturized fresh air system is facilitated.

The anion generating unit 3 further comprises a cylinder 31, and the inner cavity of the anion generating unit 3 is arranged in the cylinder 31. An inlet 3a of the negative ion generating unit 3 and an outlet 3b of the negative ion generating unit 3 are both provided on the outer surface of the cylinder 31. Wherein, the inlet 3a of the anion generating unit 3 is arranged on the side wall of the cylinder 31, the outlet 3b of the anion generating unit 3 is arranged on the top of the cylinder 31, so as to prevent water from entering the first air duct 1 through the inlet 3a of the anion generating unit 3, and simultaneously, the inlet 3a of the anion generating unit 3 is lower than the outlet 3b of the anion generating unit 3, thereby facilitating the air exhaust by utilizing the siphon effect.

As shown in fig. 5 and 6, the spraying assembly includes a nozzle 371 and a water pump 372, the nozzle 371 is disposed on the wall of the inner cavity, and the water pump 372 is connected to the nozzle 371 through a pipe 10. The water pump 372 may adjust the pressure of the water supplied to the nozzle 371, and the nozzle 371 may adjust the size and direction of the water stream sprayed to cover a wider and wider range within the cavity. Preferably, the water sprayed from the spraying unit 37 forms a water curtain, and the water curtain closes the inner cavity along the direction perpendicular to the wind flow direction, so as to increase the contact area between the wind and the water, improve the ozone removal rate, and prevent the ozone from leaking out of the gaps between the water flows.

As shown in fig. 3 and 6, a water outlet 32 is further disposed in the cylinder 31, and the water outlet 32 is located at the bottom of the cylinder 31. The water outlet 32 is arranged at the bottom of the cylinder 31 and can discharge water dissolved with ozone in the cylinder 31 as soon as possible. Preferably, the bottom of barrel 31 sets up to the structure of the obconic shape, and the point portion of the structure of the obconic shape is established to delivery port 32, can carry out the drainage better, avoids barrel 31 bottom to produce ponding.

As shown in fig. 5 and 6, the inlet 3a of the negative ion generating unit 3 is further surrounded by an air inlet duct 33, the air inlet duct 33 extends from the inner sidewall of the cylinder 31 toward the inner cavity, the air inlet duct 33 includes a top baffle 34 and a bottom plate 35, the top baffle 34 extends from the inner sidewall of the cylinder 31 toward the inner cavity and is disposed between the nozzle 371 and the inlet 3 a. The bottom plate 35 is inclined in a direction from the inner cavity toward the outside of the cylindrical body 31 toward the top baffle 34. The bottom plate 35 of the air inlet duct 33 is inclined upward from the inside to the outside in order to prevent the flow of the water condensed inside from flowing into the outer air inlet duct connected to the inlet port 3a to some extent. In other embodiments, the top baffle 34 may be separately disposed without the air inlet duct 33, so as to extend from the inner sidewall of the cylinder 31 to the inner cavity and be located between the nozzle 371 and the inlet 3 a. The spray head 371 is located on the side of the baffle far away from the inlet 3a, and can prevent water flow from directly flowing to the inlet 3a through the arrangement of the top baffle 34, so that the influence of excessive water entering the air inlet pipe on normal use is avoided.

Further, a blocking eaves 341 may be provided at an edge of the top blocking plate 34. The blocking eaves 341 extend and protrude towards the spray head 371, and a drainage opening 342 is formed at a connection position of the blocking eaves 341 and the cylinder 31. The blocking eaves 341 are used for guiding water on the surface of the blocking top baffle 34 to the water outlet 32 below, so as to avoid directly dripping into the air inlet duct 33. Moreover, a flow guide groove 343 may be further disposed on a surface of one end of the air inlet duct 33 located in the inner cavity, and two ends of the flow guide groove 343 are respectively communicated to the drainage opening 342 and the bottom surface of the cylinder 31. The diversion trench 343 is used for further guiding water, so as to guide the water along the diversion trench 343, and prevent the water flow from flowing towards the direction inside the air inlet duct 33 at the opening of the air inlet duct 33. The top baffle 34 guides the accumulated water flow to converge to the drainage opening 342 on the surface of the top baffle 34 through the drainage opening 342 and the diversion trench 343, then guides the accumulated water flow to the bottom of the cylinder through the diversion trench 343, and then flows to the water outlet 32 along the inverted conical ground.

As shown in fig. 5, the inner wall of the cylinder 31 is covered with the sound-deadening layer 36, the contact surface between the water jet of the nozzle 371 and the inner wall of the cylinder 31 is an excitation surface, and the sound-deadening layer 36 can completely cover the excitation surface. The sound-deadening layer 36 is provided to reduce the sound of the water jet when it hits the inner wall. In this embodiment, the sound deadening layer 36 is made of a glass plate, and in other embodiments, the sound deadening layer 36 may be made of other materials capable of absorbing impact sound.

As shown in fig. 7, the first air duct 1 includes a vertical section 1a and a horizontal section 1b connected in sequence, the vertical section 1a is communicated with an outlet of the electrostatic dust removal unit 2 through a fan 5, and the horizontal section 1b is communicated with an inlet 3a of the negative ion generation unit 3; wherein, horizontal section 1b is along the direction downward sloping towards anion generating element 3, can be with getting into the interior chamber of the interior log raft of first tuber pipe 1 to anion generating element 3, because be provided with high voltage electricity in the electrostatic precipitator unit 2, prevent that water from getting into electrostatic precipitator unit 2 through first tuber pipe 1, take place the electric shock accident.

As shown in fig. 4, the fresh air system further includes a second air duct 4, the second air duct 4 includes at least one bend, one end of the second air duct 4 is communicated with the outlet 3b of the negative ion generating unit 3, and the other end of the second air duct 4 is used for being communicated with the indoor space. The second air pipe 4 changes the flow direction of the air through bending, so that the air is contacted with the inner wall of the second air pipe 4, and then the redundant water vapor in the air is condensed and flows back to the inner cavity of the anion generating unit 3, so as to reduce the humidity in the air.

The fresh air system further comprises a fan 5, and the fan 5 is installed on the air path between the electrostatic dust removal unit 2 and the negative ion generation unit 3 and used for supplying air into the negative ion generation unit 3. The fan 5 accelerates the flow of wind, improves the air purification amount of the fresh air system, and simultaneously, the fan 5 can blow water flowing into the first air pipe 1 to the inner cavity of the cylinder 31, so that water is prevented from flowing into the charged electrostatic dust collection unit 2, and safety accidents occur. In other embodiments, the fan can be arranged at any position on the air duct to accelerate the air supply into the air duct.

As shown in fig. 1 and 4, the fresh air system further includes a filter screen 8, and the filter screen 8 is disposed on the air path between the electrostatic dust removal unit 2 and the fan 5. Be provided with the material and the air filter layer that remove ozone in the filter screen 8, can partly get rid of the ozone that produces in electrostatic precipitator, filter the air simultaneously, improve the cleanliness factor of air. In this embodiment, the ozone-removing substance is activated carbon. Meanwhile, the filter screen 8 further isolates water from the electrostatic dust removal unit 2, and safety is improved. In other embodiments, the screen may be disposed at any position on the air duct after the electrostatic precipitation unit 2.

As shown in fig. 3 and 4, the fresh air system further includes a water circulation device, and the water circulation device includes a water pump 372, a purified water unit 6, and a water storage tank 7. The water pump 372, the water purification unit 6 and the water storage tank 7 are sequentially arranged from top to bottom, an inlet of the water purification unit 6 is communicated with the water outlet 32 through a pipeline, an outlet of the water purification unit 6 is communicated with the water storage tank 7, and the water pump 372 is used for pumping water for the spraying assembly through the water storage tank 7. Because the air can take away a part of water volume, in order to keep the water storage tank 7 to have enough water, the water purification unit 6 is also communicated with an external water source, and when the water level in the water storage tank 7 is lower than a set water level, water can be supplemented into the water storage tank 7 in an intelligent control mode. The water discharged from the negative ion generating unit 3 is purified by the purified water unit 6 and then stored in the water storage tank 7, and then the water pump 372 is used to pump the water to the spray assembly. The fresh air system can recycle water through the water circulating device arranged in the machine body, and more water resources do not need to be additionally consumed. In other embodiments, the water line may be directly connected to the spray head, and the resulting waste water may be discharged directly through the drain opening.

The working mode of the fresh air system is briefly described below.

After the fresh air system is started, the fan 5 is started, external air enters from the inlet of the electrostatic dust removal unit 2, flows through the electrostatic dust removal unit 2, the filter screen 8, the fan 5, the first air pipe 1 and the negative ion generation unit 3 in sequence, and finally, fresh air with negative oxygen ions is discharged to the indoor through the second air pipe 4. Firstly, wind removes dust at the electrostatic dust removal unit 2, and then the wind passes through a filter screen 8 to remove part of ozone and further remove dust; secondly, when the wind flows through the anion generating unit 3, the water pump 372 sucks water in the water storage tank 7 and supplies water to the spray head 371, and the spray head 371 sprays water to the inner cavity of the barrel 31 so as to remove ozone generated by the electrostatic dust removing unit 2 and clean air. The water dissolved with ozone is discharged to the water purification unit 6 through the water outlet 32 on the cylinder 31, the water purification unit 6 purifies the water and then stores the water in the water storage tank 7 for the water supply pump 372 to use, and the whole fresh air system realizes the reciprocating cyclic utilization of the water. When the water level in the water storage tank 7 is lower than the set water level, water can be supplemented into the water storage tank 7 in an intelligent control mode. The fresh air system inlet 20 and the fresh air system outlet 30 are shown in fig. 1. The direction of wind flow 40 in the fresh air system is shown by the arrows in the figure.

Example 2

As shown in fig. 8, the structure of the present embodiment is substantially the same as that of embodiment 1, except that: the spraying assembly 37 comprises a spraying head 371, a motor 101, a turntable 102 and a support member 103, wherein the spraying head 371, the motor 101 and the turntable 102 are mounted at the central part of the cylinder 31 through the support member 103, the turntable 102 is connected with the motor 101 through a shaft, and the motor 101 drives the turntable 102 to rotate. The inside wall of barrel 31 is provided with a plurality of spacing archs 311, and the extending direction of spacing archs 311 is the axial of barrel 31, and the one end that support piece 103 is close to barrel 31 has the portion of sliding, and the portion cover that slides is established on the surface of spacing archs 311 and can be followed the extending direction and movable, conveniently adjusts the high position of shower nozzle 371 in barrel 31.

The below of carousel 102 is provided with shower nozzle 371, and shower nozzle 371 passes through pipeline 10 and water pump intercommunication, and the upper surface of shower nozzle 371 is provided with a plurality of hole for water spraying, and shower nozzle 371 is the loop configuration, and the central point of loop configuration is located the axis of rotation axis, and a plurality of hole for water spraying follow hoop evenly distributed on shower nozzle 371 to the hole for water spraying is towards carousel 102. The water sprayed from the water spray holes is cut by the rotary disc 102 rotating at high speed, and disperses the water flow, increasing the contact area between the water and the ozone, improving the ozone removal rate, and generating negative oxygen ions and cleaning the air through the physical excitation of the rotary disc 102 and the water flow. Preferably, the rotating disk 102 is an impeller, which facilitates dispersing water more uniformly and generating more negative oxygen ions.

Although specific embodiments of the present invention have been described above, it will be understood by those skilled in the art that this is by way of example only and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and the principles of the present invention, and these changes and modifications are all within the scope of the present invention.

Claims

1. The utility model provides a fresh air system, its characterized in that, it includes first tuber pipe, electrostatic precipitator unit and anion generating unit, the export of electrostatic precipitator unit is passed through first tuber pipe communicate in anion generating unit's entry, anion generating unit have with the inner chamber of entry intercommunication, anion generating unit is including spraying the subassembly, spraying the subassembly set up in the inner chamber, spraying the subassembly be used for toward the inner chamber water spray, the ozone that electrostatic precipitator unit produced passes through first tuber pipe is carried extremely the inner chamber, with spraying subassembly spun water is in the inner chamber is crossed, spraying subassembly spun water is used for getting rid of ozone.

2. The fresh air system as claimed in claim 1, wherein the negative ion generating unit and the electrostatic precipitation unit are arranged in sequence from top to bottom.

3. The fresh air system as claimed in claim 1, wherein the first air duct comprises a vertical section and a transverse section which are connected in sequence, the vertical section is communicated with the outlet of the electrostatic dust removal unit, and the transverse section is communicated with the inlet of the negative ion generation unit;

4. The fresh air system as claimed in claim 1, wherein the inlet of the negative ion generating unit is disposed on a side wall of the inner cavity, and the outlet of the negative ion generating unit is disposed on a top of the inner cavity.

5. The fresh air system as claimed in claim 4, further comprising a second air duct, wherein the second air duct comprises at least one bend, one end of the second air duct is communicated with the outlet of the negative ion generating unit, and the other end of the second air duct is used for being communicated with the indoor space.

6. The fresh air system as claimed in claim 1, wherein the water sprayed from the spray assembly forms a water curtain that closes the interior chamber in a direction perpendicular to the direction of the wind.

7. The fresh air system as claimed in claim 1, wherein the negative ion generating unit further comprises a water outlet, and the water outlet is arranged at the bottom of the inner cavity.

8. The fresh air system as claimed in claim 7, further comprising a water circulation device, wherein the water circulation device comprises a water pump, a purified water unit and a water storage tank, the water pump, the purified water unit and the water storage tank are sequentially arranged from top to bottom, an inlet of the purified water unit is communicated with the water outlet, an outlet of the purified water unit is communicated with the water storage tank, and the water pump is used for pumping water to the spraying assembly through the water storage tank.

9. The fresh air system as claimed in claim 1, further comprising a fan, wherein the fan is installed in the air path between the electrostatic dust removal unit and the negative ion generation unit, and is used for supplying air into the negative ion generation unit.

10. The fresh air system as claimed in claim 9, further comprising a filter screen disposed in the air path between the electrostatic precipitator unit and the fan.

11. The fresh air system as claimed in any one of claims 1 to 10, wherein the spray assembly comprises a spray head and a water pump, the spray head is arranged on the wall surface of the inner cavity, and the water pump is communicated to the spray head through a pipeline.