A fresh air blower

Abstract

The present invention discloses a fresh air blower, which includes a casing and a blower. An outdoor ventilation plate is vertically arranged inside the casing. An inner cavity is formed between the outdoor ventilation plate and the front panel, and an outer cavity is formed between the outdoor ventilation plate and the rear panel. An inner and outer partition board is vertically arranged in the inner cavity; a upper partition board and a lower partition board are horizontally arranged in the inner cavity from top to bottom. The upper partition board and the lower partition board divide the inner cavity into a first chamber, a second chamber and a third chamber in sequence from top to bottom. The blower is arranged between the first chamber and the second chamber. The present invention can not only effectively ensure the air quality coming in from the outside, but also realize the function of automatic switching between indoor and outdoor circulation, and can effectively ensure the air quality indoors.

Description

Technical Field

[0001] The present invention belongs to the technical field of fresh air systems, and particularly relates to a fresh air fan. Background Art

[0002] As is well known, when people are in the indoor environment of work or life, they generally are accustomed to regularly opening doors and windows for ventilation. Regularly opening windows for ventilation can effectively remove harmful gases in the indoor air and purify the indoor air. It is measured that when all doors and windows are opened and the indoor and outdoor air convection is good, the indoor and outdoor air can be exchanged once in 15 minutes. Regularly opening windows for ventilation can greatly reduce the content of germs in the indoor air.

[0003] For the current design concept of building doors and windows, generally a structure of large fixed and small opening is adopted. This design method can improve the airtightness of the indoor part of the building, but the ventilation effect of the building is sacrificed. That is to say, there is generally a lack of fresh air volume in the current buildings. Long-term staying in a room with insufficient fresh air volume is prone to "indoor syndrome", showing symptoms such as headache, chest tightness, and easy fatigue, and is also prone to cause respiratory and nervous system diseases, etc.

[0004] In addition, on windy days and rainy days, people generally cannot open the windows to block wind and rain. These are all problems existing in the prior art, and the existing fresh air fans generally also have the following problems:

[0005] 1. The existing fresh air fan cannot control whether to select internal circulation or external circulation according to the indoor control quality.

[0006] 2. The existing fresh air fan only has a ventilation function or only has a purification function.

[0007] 3. The existing fresh air fan cannot separate indoor and outdoor air.

[0008] 4. The existing fresh air fan cannot effectively purify the air coming in from the outside. Summary of the Invention

[0009] The purpose of the present invention is to provide a fresh air fan to solve at least one of the above problems existing in the prior art.

[0010] To achieve the above purpose, the present invention adopts the following technical solutions:

[0011] A fresh air fan includes a housing and a fan. The panel on the side of the housing close to the indoor is the front panel, and the panel on the side of the housing close to the outdoor is the rear panel; an outdoor ventilation board is vertically arranged inside the housing. An inner cavity is formed between the outdoor ventilation board and the front panel, and an outer cavity is formed between the outdoor ventilation board and the rear panel. An inner and outer partition board is vertically arranged in the inner cavity.

[0012] A upper partition plate and a lower partition plate are horizontally arranged in the inner cavity from top to bottom. The upper partition plate and the lower partition plate divide the inner cavity into a first chamber, a second chamber, and a third chamber in sequence from top to bottom. The blower is arranged between the first chamber and the second chamber; the inner and outer partition plates divide the first chamber into a blower air inlet chamber close to the outdoor side and a blower air outlet chamber close to the indoor side. The blower air inlet chamber is communicated with the air inlet of the blower, the blower air outlet chamber is communicated with the air outlet of the blower, and the blower air inlet chamber is communicated with the second chamber;

[0013] A first indoor ventilation opening corresponding to the blower air outlet chamber is arranged on the front panel, and a second indoor ventilation opening corresponding to the second chamber is also arranged on the front panel;

[0014] Outdoor ventilation holes communicating the outer cavity and the blower air inlet chamber are arranged on the outdoor ventilation plate, rear air inlet holes communicating the outer cavity and the outdoors are arranged on the rear panel. An outdoor ventilation partition plate is slidably connected to the outdoor ventilation plate, and partition ventilation openings are arranged on the outdoor ventilation partition plate; a driving mechanism is also arranged in the housing. The driving mechanism is in transmission connection with the outdoor ventilation partition plate and can drive the partition ventilation openings of the outdoor ventilation partition plate to be communicated with or misaligned and blocked with the outdoor ventilation holes.

[0015] As a preferred technical solution in the present invention, the driving mechanism includes a motor, a connecting shaft, and a cam. The cam is rotatably connected to the outdoor ventilation plate, and the lower end of the outdoor ventilation partition plate abuts against the cam; the motor is installed in the second chamber or the third chamber, and the motor shaft of the motor is connected to the cam through the connecting shaft.

[0016] As a preferred technical solution in the present invention, the motor is located in the second chamber, and the motor is installed on the inner wall of the blower close to the outdoor side.

[0017] As a preferred technical solution in the present invention, a control panel is arranged on the front panel, and the control panel is electrically connected to both the driving mechanism and the blower.

[0018] As a preferred technical solution in the present invention, an atomization device is arranged in the blower air outlet chamber. The atomization device is electrically connected to the control panel, and a nozzle is arranged on the atomization device.

[0019] As a preferred technical solution in the present invention, a purification liquid and a water pump are arranged in the third chamber. The water pump is electrically connected to the control panel, and the purification liquid is communicated with the atomization device through the water pump.

[0020] As a preferred technical solution in the present invention, a sensor probe is arranged in the second chamber. The sensor probe is electrically connected to the control panel.

[0021] As a preferred technical solution in the present invention, the rear air inlet hole is located horizontally below the outdoor ventilation hole corresponding to the second chamber and / or the third chamber, and a gauze is provided on the rear panel corresponding to the rear air inlet hole.

[0022] As a preferred technical solution in the present invention, a first filter is arranged between the outdoor ventilation plate and the outdoor ventilation partition.

[0023] As a preferred technical solution in the present invention, a second filter screen is provided on the inner side of the front panel corresponding to the first indoor vent and the second indoor vent.

[0024] Beneficial effect: The present invention is provided with a fan in the casing, which can purify the air entering the casing. In the present invention, a driving mechanism arranged in the casing is transmission-connected with the outdoor ventilation baffle and can drive the baffle vent of the outdoor ventilation baffle to be connected with the outdoor ventilation hole or to be offset and blocked. When the baffle vent is connected with the outdoor ventilation hole, the outdoor air enters the outer cavity through the rear air inlet hole, then enters the fan air inlet cavity through the outdoor ventilation hole, and then enters the fan air outlet cavity after being purified by the fan. The purified air inside the fan air outlet cavity flows into the room through the first indoor vent, thereby improving the indoor control quality and realizing the external circulation mode of outdoor and indoor air circulation; when the baffle vent is offset from the outdoor ventilation hole, the outdoor ventilation baffle blocks the outdoor ventilation plate, thereby blocking the outdoor air from entering the fan air inlet cavity, and at this time, the indoor air can pass through the second indoor vent The inner vent enters the second chamber, then flows into the fan air inlet chamber from the second chamber, and then passes through the fan air outlet chamber after purification by the fan. In the fan air outlet chamber, an inner circulation mode of indoor air and indoor air circulation is realized. At the same time, the height difference between the first indoor vent and the second indoor vent is also more conducive to the circulation of indoor air during the inner circulation, making the inner circulation more natural. The present invention can not only effectively ensure the quality of air coming in from the outside, but also realize the function of automatic switching between indoor and outdoor circulation through the sliding of the outdoor ventilation baffle. The fresh air fan can be controlled according to the indoor air quality to realize the purification mode of independent inner circulation or outer circulation, which can effectively ensure the indoor air quality. The height difference design between the outdoor vent and the second indoor vent, while effectively ensuring the separation of indoor and outdoor air, also improves the indoor and outdoor air exchange efficiency per unit time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the internal structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the internal structure of the second chamber after it is cut open;

[0027] Figure 3 It is a schematic diagram of the structure between the outdoor ventilation plate and the rear panel in the present invention;

[0028] Figure 4 Schematic diagram of air circulation in the present invention when the partition ventilation opening and the outdoor ventilation hole are misaligned;

[0029] Figure 5 Schematic diagram of the position between the outdoor ventilation plate and the outdoor ventilation partition when the partition ventilation opening and the outdoor ventilation hole are misaligned;

[0030] Figure 6 Schematic diagram of air circulation in the present invention when the partition ventilation opening and the outdoor ventilation hole are connected;

[0031] Figure 7 Schematic diagram of the position between the outdoor ventilation plate and the outdoor ventilation partition when the partition ventilation opening and the outdoor ventilation hole are connected;

[0032] Figure 8 Schematic diagram of the installation of the screen on the rear panel;

[0033] Figure 9 Schematic diagram of the structure of a part of the rear panel.

[0034] In the figure: 1 - housing; 2 - fan; 101 - front panel; 1011 - first indoor ventilation opening; 1012 - second indoor ventilation opening; 102 - rear panel; 1021 - rear air inlet hole; 103 - outer cavity; 104 - first chamber; 1041 - fan air inlet chamber; 1042 - fan air outlet chamber; 105 - second chamber; 106 - third chamber; 3 - outdoor ventilation plate; 301 - outdoor ventilation hole; 4 - inner and outer partition; 5 - upper partition; 6 - lower partition; 7 - outdoor ventilation partition; 701 - partition ventilation opening; 8 - motor; 9 - connecting shaft; 10 - cam; 11 - control panel; 12 - atomizing device; 13 - nozzle; 14 - purification liquid; 15 - water pump; 16 - sensor probe; 17 - screen; 18 - first filter; 19 - second filter. Detailed implementation manners

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the present invention in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structures of the drawings is only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. It should be noted here that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation to the present invention.

[0036] Embodiment:

[0037] As Figures 1-9As shown in the figure, this embodiment provides a fresh air fan, which includes a casing 1 and a fan 2. The fan 2 is installed inside the casing 1 to purify the air entering the casing 1. The panel of the casing 1 close to the indoor side is the front panel 101, and the front panel 101 corresponds to the indoor area. The panel of the casing 1 close to the outdoor side is the rear panel 102, and the rear panel 102 corresponds to the outdoor area. A fresh air fan structure is formed between the outdoor and indoor areas, thereby more efficiently purifying the indoor air.

[0038] Among them, an outdoor ventilation plate 3 is vertically arranged inside the casing 1. An inner cavity is formed between the outdoor ventilation plate 3 and the front panel 101, and an outer cavity 103 is formed between the outdoor ventilation plate 3 and the rear panel 102. An inner and outer partition plate 4 is vertically arranged in the inner cavity, making the inner cavity and the outer cavity 103 independent of each other. Air circulation only occurs at the positions where ventilation holes are provided, which is more convenient for guiding and controlling the internal gas circulation.

[0039] An upper partition plate 5 and a lower partition plate 6 are horizontally arranged in the inner cavity from top to bottom. The upper partition plate 5 and the lower partition plate 6 divide the inner cavity into a first chamber 104, a second chamber 105, and a third chamber 106 from top to bottom in sequence, making the first chamber 104, the second chamber 105, and the third chamber 106 independent of each other. The fan 2 is arranged between the first chamber 104 and the second chamber 105, but does not affect the sealing between the first chamber 104 and the second chamber 105. The inner and outer partition plate 4 divides the first chamber 104 into a fan air intake chamber 1041 close to the outdoor side and a fan air outlet chamber 1042 close to the indoor side. The fan air intake chamber 1041 is communicated with the air intake port of the fan 2, and the fan air outlet chamber 1042 is communicated with the air outlet port of the fan 2, which can prevent the air intake port and the air outlet port of the fan 2 from being in the same chamber, thereby preventing the purified air from mixing with the unpurified air and affecting the purification effect of the fan 2. The fan air intake chamber 1041 is communicated with the second chamber 105, and the second chamber 105 can be used to guide the indoor dirty air to the fan air intake chamber 1041, and then enter the fan 2 for purification treatment.

[0040] A first indoor ventilation port 1011 corresponding to the fan air outlet chamber 1042 is provided on the front panel 101, which is convenient for the air purified by the fan 2 to flow into the room through the fan air outlet chamber 1042 and improve the indoor air quality. A second indoor ventilation port 1012 corresponding to the second chamber 105 is also provided on the front panel 101, which is convenient for the indoor air to enter the second chamber 105 through the second indoor ventilation port 1012, then flow from the second chamber 105 into the fan air intake chamber 1041, and then flow into the room after being purified by the fan 2, so that the indoor air can be purified and the indoor air quality can be improved.

[0041] An outdoor ventilation plate 3 is provided with an outdoor ventilation hole 301 communicating with an outer cavity 103 and a fan air inlet cavity 1041. A rear panel 102 is provided with a rear air inlet hole 1021 communicating with the outer cavity 103 and the outside, facilitating the entry of outdoor air into the outer cavity 103 through the rear air inlet hole 1021, then entering the fan air inlet cavity 1041 through the outdoor ventilation hole 301, and flowing into the room after being purified by the fan 2 to improve the indoor control quality. An outdoor ventilation partition 7 is slidably connected to the outdoor ventilation plate 3. The outdoor ventilation partition 7 can slide up and down on the outdoor ventilation plate 3, and a partition ventilation opening 701 is provided on the outdoor ventilation partition 7. A driving mechanism is further provided in the machine shell 1. The driving mechanism is in transmission connection with the outdoor ventilation partition 7 and can drive the partition ventilation opening 701 of the outdoor ventilation partition 7 to communicate with or be misaligned and blocked (i.e., blocked by misalignment) with the outdoor ventilation hole 301. When the partition ventilation opening 701 communicates with the outdoor ventilation hole 301, outdoor air can be introduced into the fan air inlet cavity 1041, and at this time, it is convenient to use outdoor air to improve indoor air quality. When the partition ventilation opening 701 is misaligned with the outdoor ventilation hole 301, the outdoor ventilation partition 7 blocks the outdoor ventilation plate 3, thereby blocking outdoor air from entering the fan air inlet cavity 1041. At this time, indoor air can be directly used for purification treatment to improve indoor air quality in another way.

[0042] The present invention is provided with a fan 2 in the casing 1, which can purify the air entering the casing 1. In the present invention, the driving mechanism arranged in the casing 1 is transmission-connected with the outdoor ventilation baffle 7 and can drive the baffle vent 701 of the outdoor ventilation baffle 7 to communicate with the outdoor ventilation hole 301 or to be misaligned and blocked. When the baffle vent 701 is connected with the outdoor ventilation hole 301, the outdoor air enters the outer cavity 103 through the rear air inlet hole 1021, and then enters the fan air inlet cavity 1041 through the outdoor ventilation hole 301, and then enters the fan air outlet cavity 1042 after being purified by the fan 2. The purified air inside the fan air outlet cavity 1042 flows into the room through the first indoor vent 1011, thereby improving the indoor control quality and realizing the external circulation mode of outdoor and indoor air circulation; when the baffle vent 701 is misaligned with the outdoor ventilation hole 301, the outdoor ventilation baffle 7 blocks the outdoor ventilation plate 3, thereby preventing the outdoor air from entering the fan air inlet cavity 1041, and at this time, the indoor The air enters the second chamber 105 through the second indoor vent 1012, then flows into the fan air inlet chamber 1041 from the second chamber 105, and then passes through the fan 2 to purify the fan air outlet chamber 1042. In the fan air outlet chamber 1042, the indoor air and the indoor air are circulated in an internal circulation mode. At the same time, the height difference between the first indoor vent 1011 and the second indoor vent 1012 is also more conducive to the circulation of indoor air during the internal circulation, making the internal circulation more natural. The present invention can not only effectively ensure the quality of air coming in from the outside, but also realize the function of automatic switching between indoor and outdoor circulation through the sliding of the outdoor ventilation baffle 7. The new air fan can be controlled according to the indoor air quality to realize the purification mode of independent internal circulation or external circulation, which can effectively ensure the indoor air quality. The height difference design of the outdoor vent 301 and the second indoor vent 1012 effectively ensures the separation of indoor and outdoor air, and also improves the indoor and outdoor air exchange efficiency per unit time.

[0043] As a preferred implementation scheme in this embodiment, it needs to be further explained that the driving mechanism includes a motor 8, a connecting shaft 9 and a cam 10. The cam 10 is rotatably connected to the outdoor ventilation plate 3, and the lower end of the outdoor ventilation baffle 7 abuts against the cam 10. The motor 8 drives the connecting shaft 9 to rotate, and the connecting shaft 9 drives the cam 10 to rotate, so that the support point of the cam 10 on the outdoor ventilation baffle 7 changes continuously, so that the outdoor ventilation baffle 7 slides up and down under the action of its own gravity and the supporting force of the cam 10; the motor 8 is installed in the second chamber 105 or the third chamber 106, without specific restrictions, and can be adjusted according to the size of the outdoor ventilation baffle 7, the position of the outdoor ventilation hole 301, etc., so as to determine the actual installation position of the cam 10, and thus the actual installation position of the motor 8 can be determined. The motor shaft of the motor 8 is connected to the cam 10 through the connecting shaft 9.

[0044] As a preferred implementation in this embodiment, it should be further noted that the motor 8 is located in the second chamber 105, and the motor 8 is installed on the inner wall of the blower 2 close to the outdoor side. In this way, the motor 8 can be separated from the air flowing in the second chamber 105, avoiding the air flowing in the second chamber 105 from flushing the motor 8 and affecting the quality of the motor.

[0045] As a preferred implementation in this embodiment, it should be further noted that a control panel 11 is provided on the front panel 101. The control panel 11 is electrically connected to both the driving mechanism and the blower 2 (the specific connection method is the prior art and will not be described in detail). The control panel 11 can be regarded as a controller, and the driving mechanism and the blower 2 can be controlled through the control panel 11, thereby realizing the control of the internal circulation and the external circulation, making the device more intelligent.

[0046] As a preferred implementation in this embodiment, it should be further noted that an atomizing device 12 is provided in the blower air outlet chamber 1042. The atomizing device 12 is electrically connected to the control panel 11, and a nozzle 13 is provided on the atomizing device 12. Through the atomizing device 12, a purification liquid or water can be sprayed into the blower air outlet chamber 1042, thereby achieving the effect of purifying or humidifying the air, and processing the air more reasonably according to the actual situation to ensure the air quality in the room.

[0047] As a preferred implementation in this embodiment, it should be further noted that a purification liquid 14 and a water pump 15 are provided in the third chamber 106. The water pump 15 is electrically connected to the control panel 11, and the purification liquid 14 is communicated with the atomizing device 12 through the water pump 15, which is convenient for providing the purification liquid for the atomizing device 12, and then the atomizing device 12 performs purification treatment on the air again to ensure the air quality. It should be noted that an installation door can be provided on the casing 1 corresponding to the third chamber 106, which is convenient for repairing the device, adding the purification liquid, or replacing the purification liquid to ensure the use effect of the device.

[0048] As a preferred implementation in this embodiment, it should be further noted that a sensor probe 16 is provided in the second chamber 105. The sensor probe 16 is electrically connected to the control panel 11. The sensor probe 16 can include, but is not limited to, one or any combination of a temperature and humidity sensor, a PM2.5 sensor, a voc sensor, and an infrared sensor, and can be set according to needs to detect the air quality in the room in all directions.

[0049] As a preferred implementation in this embodiment, it should be further noted that the rear air inlet hole 1021 is located below the outdoor ventilation hole 301 corresponding to the second chamber 105 and / or the third chamber 106 in the horizontal direction. That is, in the horizontal direction, the rear air inlet hole 1021 is located below the outdoor ventilation hole 301. According to the coverage area of the rear air inlet hole 1021, the position corresponding to the second chamber 105 and / or the third chamber 106 is determined. And the rear air inlet hole 1021 being located below the outdoor ventilation hole 301 can appropriately prevent rainwater from entering the outdoor ventilation hole 301. Moreover, a screen 17 is provided on the rear panel 102 corresponding to the rear air inlet hole 1021, which can effectively prevent mosquitoes from entering the fresh air fan and affecting the use of the fresh air fan.

[0050] As a preferred implementation in this embodiment, it should be further noted that a first filter screen 18 is provided between the outdoor ventilation plate 3 and the outdoor ventilation partition 7, which can preliminarily filter the air before entering the fan, thereby improving the control quality of the air entering the fan, relatively reducing the power consumption of the fan, and prolonging the service life of the fan.

[0051] As a preferred implementation in this embodiment, it should be further noted that second filter screens 19 are provided on the inner sides of the front panel 101 corresponding to the first indoor ventilation opening 1011 and the second indoor ventilation opening 1012. The second filter screens 19 can appropriately filter the indoor air, improve the quality of the air entering the fan from the second indoor ventilation opening 1012, relatively reduce the power consumption of the fan, and prolong the service life of the fan. At the same time, when the fan 2 is not running, the second filter screens 19 can preliminarily filter the indoor air entering the air outlet chamber 1042 of the fan from the first indoor ventilation opening 1011 to ensure the air quality in the air outlet chamber 1042 of the fan.

[0052] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A fresh air blower, characterized in that, It includes a housing (1) and a blower (2). The panel of the housing (1) on the side close to the interior is the front panel (101), and the panel of the housing (1) on the side close to the exterior is the rear panel (102); An outdoor ventilation plate (3) is vertically arranged inside the housing (1). An inner cavity is formed between the outdoor ventilation plate (3) and the front panel (101), and an outer cavity (103) is formed between the outdoor ventilation plate (3) and the rear panel (102). An inner-outer partition plate (4) is vertically arranged in the inner cavity; In the inner cavity, an upper partition plate (5) and a lower partition plate (6) are horizontally arranged from top to bottom. The upper partition plate (5) and the lower partition plate (6) divide the inner cavity into a first chamber (104), a second chamber (105), and a third chamber (106) in sequence from top to bottom. The blower (2) is arranged between the first chamber (104) and the second chamber (105); The inner-outer partition plate (4) divides the first chamber (104) into a blower air intake cavity (1041) on the side close to the exterior and a blower air outlet cavity (1042) on the side close to the interior. The blower air intake cavity (1041) is communicated with the air intake port of the blower (2), the blower air outlet cavity (1042) is communicated with the air outlet port of the blower (2), and the blower air intake cavity (1041) is communicated with the second chamber (105); A first indoor ventilation opening (1011) corresponding to the blower air outlet cavity (1042) is arranged on the front panel (101), and a second indoor ventilation opening (1012) corresponding to the second chamber (105) is also arranged on the front panel (101); An outdoor ventilation hole (301) communicating the outer cavity (103) and the blower air intake cavity (1041) is arranged on the outdoor ventilation plate (3). The rear panel (102) is provided with a rear air intake hole (1021) communicating the outer cavity (103) and the outdoors. An outdoor ventilation partition plate (7) is slidably connected to the outdoor ventilation plate (3), and a partition ventilation opening (701) is arranged on the outdoor ventilation partition plate (7); A driving mechanism is also arranged inside the housing (1). The driving mechanism is in transmission connection with the outdoor ventilation partition plate (7) and can drive the partition ventilation opening (701) of the outdoor ventilation partition plate (7) to be communicated with or misaligned and blocked with the outdoor ventilation hole (301); The driving mechanism includes a motor (8), a connecting shaft (9), and a cam (10). The cam (10) is rotatably connected to the outdoor ventilation plate (3), and the lower end of the outdoor ventilation partition plate (7) abuts against the cam (10); The motor (8) is installed in the second chamber (105) or the third chamber (106). The motor shaft of the motor (8) is connected to the cam (10) through the connecting shaft (9).

2. The fresh air blower according to claim 1, characterized in that, The motor (8) is located in the second chamber (105), and the motor (8) is installed on the inner wall of the blower (2) on the side close to the exterior.

3. The fresh air fan according to claim 1 or 2, characterized in that A control panel (11) is arranged on the front panel (101). The control panel (11) is electrically connected to both the driving mechanism and the blower (2).

4. The fresh air blower according to claim 3, characterized in that, An atomizing device (12) is arranged in the blower air outlet cavity (1042). The atomizing device (12) is electrically connected to the control panel (11), and a nozzle (13) is arranged on the atomizing device (12).

5. The fresh air unit according to claim 4, characterized in that, A purification liquid (14) and a water pump (15) are arranged in the third chamber (106). The water pump (15) is electrically connected to the control panel (11), and the purification liquid (14) communicates with the atomizing device (12) through the water pump (15).

6. The fresh air fan according to claim 3, characterized in that, A sensor probe (16) is arranged in the second chamber (105). The sensor probe (16) is electrically connected to the control panel (11).

7. The fresh air unit according to claim 1, wherein The rear air inlet hole (1021) is located below the outdoor ventilation hole (301) corresponding to the second chamber (105) and / or the third chamber (106) in the horizontal direction, and a screen (17) is arranged on the rear panel (102) corresponding to the rear air inlet hole (1021).

8. A fresh air fan according to claim 1, characterized in that, A first filter screen (18) is arranged between the outdoor ventilation plate (3) and the outdoor ventilation partition plate (7).

9. The fresh air blower according to claim 1, characterized in that, Second filter screens (19) are arranged on the inner sides of the front panels (101) corresponding to the first indoor ventilation opening (1011) and the second indoor ventilation opening (1012).

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