Fresh air device, air conditioner and control method thereof

Abstract

The present invention provides a fresh air device, an air conditioner and a control method thereof, wherein the fresh air device comprises a device shell, wherein a fresh air drive chamber and a dirty air drive chamber are constructed in the device shell, wherein the fresh air drive chamber and the dirty air drive chamber are independent of each other, wherein the fresh air drive chamber has a fresh air inlet and a fresh air outlet, wherein a first fan blade is arranged in the fresh air drive chamber, wherein the dirty air drive chamber has a dirty air inlet and a dirty air outlet, wherein a second fan blade is arranged in the dirty air drive chamber. According to the present invention, the fresh air device can introduce fresh air from the external environment into the room, and at the same time, discharge the indoor dirty air into the outdoor environment, thereby more efficiently improving the indoor air quality. At the same time, since the fresh air drive chamber and the dirty air drive chamber are simultaneously constructed in the device shell, the overall structure of the fresh air device is more compact and occupies less space.

Description

Technical Field

[0001] The present invention belongs to the technical field of air conditioning, and in particular relates to a fresh air device, an air conditioner and a control method thereof. Background Art

[0002] At present, the air quality is getting worse and worse. When users use air conditioners, they pay more and more attention to the quality of the air in the room. Air conditioners with fresh air function are gradually appearing on the market, but the functions of existing fresh air devices are relatively single. Summary of the invention

[0003] Therefore, the present invention provides a fresh air device, an air conditioner and a control method thereof to overcome the deficiency of the fresh air device in the prior art having a single function.

[0004] In order to solve the above problems, the present invention provides a fresh air device, including a device shell, wherein a fresh air driving chamber and a dirty air driving chamber are constructed in the device shell, the fresh air driving chamber and the dirty air driving chamber are independent of each other, the fresh air driving chamber has a fresh air inlet and a fresh air outlet, a first fan blade is arranged in the fresh air driving chamber, the dirty air driving chamber has a dirty air inlet and a dirty air outlet, and a second fan blade is arranged in the dirty air driving chamber.

[0005] Preferably, the fresh air device further comprises a first drive motor, which is a double-shaft motor, and the first fan blade and the second fan blade are respectively mounted on both ends of a power output shaft of the double-shaft motor.

[0006] Preferably, the fresh air inlet corresponds to a fresh air inlet pipe, the dirty air outlet corresponds to the dirty air exhaust pipe, and a first damper is provided between the fresh air inlet pipe and the dirty air exhaust pipe. The first damper has a first position for connecting the fresh air inlet pipe with the dirty air exhaust pipe and cutting off the fresh air inlet pipe and the dirty air exhaust pipe from the external environment, and a second position for cutting off the fresh air inlet pipe and the dirty air exhaust pipe.

[0007] Preferably, the device shell includes a dirty air side volute, a motor mounting plate, and a fresh air side volute. The dirty air side volute and the motor mounting plate are assembled as one body to form the dirty air drive chamber therebetween. The fresh air side volute and the motor mounting plate are assembled as one body to form the fresh air drive chamber therebetween. The first drive motor is fixedly connected to the motor mounting plate and is located in the fresh air drive chamber or the dirty air drive chamber.

[0008] Preferably, the fresh air side volute includes a fresh air volute main body, a first flow hole is constructed on the fresh air volute main body, the first fan blade is in the first flow hole, a first volute cover is connected to the side of the first flow hole away from the motor mounting plate, and the fresh air inlet is constructed on the first volute cover.

[0009] Preferably, a first filter assembly is provided on the communication path between the first flow hole and the fresh air inlet.

[0010] Preferably, the first damper is located at the air inlet side of the first through hole, and the first filter assembly is also located between the first damper and the first through hole.

[0011] Preferably, a filter element disassembly and assembly channel is constructed on the first volute cover, and the first filter assembly is inserted into the filter element disassembly and assembly channel.

[0012] Preferably, the first filter assembly comprises a filter element handle, the filter element handle has a placement groove, and the first filter element is placed in the placement groove.

[0013] Preferably, the first filter assembly has two groups, the filter element disassembly and assembly channels have two, the two filter element disassembly and assembly channels are symmetrically located on both sides of the first volute cover, and the two groups of the first filter assemblies are respectively inserted into the two filter element disassembly and assembly channels one by one; and / or, a filter element mounting bracket is also connected to the side of the fresh air volute main body facing the first volute cover, and the first filter assembly is slidably connected to the side of the filter element mounting bracket facing away from the fresh air volute main body.

[0014] Preferably, the filter element handle has an outer handle plate matching the filter element disassembly and assembly channel, and a dirty air inlet connected to the dirty air inlet port is constructed on the outer handle plate; and / or a handle position is constructed on the outer handle plate.

[0015] Preferably, a second filter is provided in the dirty air inlet; and / or a first dirty air flow hole communicating with the dirty air inlet of the dirty air driving chamber is further constructed on the fresh air volute body.

[0016] Preferably, the fresh air device also includes a dirty air circulation adapter shell, the fresh air volute body is also constructed with a second dirty air flow hole connected to the dirty air exhaust port of the dirty air driving chamber, the dirty air circulation adapter shell is constructed with a first flow hole docking with the second dirty air flow hole and a second flow hole docking with the dirty air exhaust pipe; and / or the dirty air exhaust port and / or the dirty air inlet are constructed on the motor mounting plate.

[0017] Preferably, the dirty air side volute includes a dirty air volute body, a second flow hole is configured on the dirty air volute body, the second fan blade is located in the second flow hole, and a second volute cover is connected to the side of the second flow hole away from the motor mounting plate.

[0018] Preferably, a fresh air outlet is constructed on the second volute cover, the fresh air outlet is communicated with the fresh air exhaust port, and a second damper is provided at the fresh air outlet.

[0019] Preferably, the dirty air volute body is further configured with a first fresh air flow hole connected to the fresh air outlet; and / or the fresh air outlet is configured on the motor mounting plate.

[0020] The present invention also provides an air conditioner, comprising the above-mentioned fresh air device.

[0021] The present invention also provides a method for controlling an air conditioner, comprising the following steps:

[0022] Get the operating mode of the air conditioner;

[0023] The positions of the first damper and the second damper are switched according to the operation mode.

[0024] Preferably, when the operation mode is the air intake and exhaust mode, the first damper is controlled to be in the second position so that the fresh air inlet pipe and the dirty air outlet pipe are independent of each other, and the second damper is controlled to be opened so that the fresh air outlet is connected; or,

[0025] When the operation mode is the internal circulation mode, the first damper is controlled to be in the first position to connect the fresh air inlet pipe with the dirty air outlet pipe and cut off the fresh air inlet pipe and the dirty air outlet pipe from the external environment, and the second damper is controlled to open to allow the fresh air outlet to pass through.

[0026] The present invention provides a fresh air device, an air conditioner and a control method thereof, wherein the first fan blade and the second fan blade can respectively drive the fresh air and the indoor polluted air, so that the fresh air device can introduce the fresh air from the external environment into the indoor environment while discharging the indoor polluted air into the outdoor environment, thereby more efficiently improving the indoor air quality. At the same time, since the fresh air driving chamber and the polluted air driving chamber are simultaneously constructed in the device shell, the overall structure of the fresh air device is more compact and occupies less space. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is a schematic diagram of the disassembled structure of the fresh air device according to an embodiment of the present invention;

[0028] Figure 2 for Figure 1 A schematic diagram of the three-dimensional structure of the dirty air volute body;

[0029] Figure 3 for Figure 1 A schematic diagram of the three-dimensional structure of the motor mounting plate;

[0030] Figure 4 for Figure 1A schematic diagram of the three-dimensional structure of the fresh air volute main body;

[0031] Figure 5 for Figure 1 A schematic diagram of the three-dimensional structure of the filter element handle;

[0032] Figure 6 for Figure 1 A schematic diagram of the three-dimensional structure of the first volute cover;

[0033] Figure 7 for Figure 1 A schematic diagram of the assembly structure of the fresh air device in one viewing angle;

[0034] Figure 8 for Figure 1 A schematic diagram of the assembly structure of the fresh air device in another perspective;

[0035] Fig. 9 for Figure 1 A schematic diagram of the assembly structure of the fresh air device in another viewing angle;

[0036] Fig.10 for Fig. 9 A side view of AA in the figure, in which the arrow specifically shows the direction of air flow when the fresh air device introduces fresh air, and the first air door is in the second position;

[0037] Fig.11 for Fig. 9 The top view of AA in the figure shows the direction of the airflow of the indoor dirty air driven by the second fan blade into the dirty air driving cavity;

[0038] Fig.12 for Fig. 9 The arrow in the figure specifically shows the direction of airflow in the fresh air device in the circulation state, and the first damper is in the first position.

[0039] The reference numerals are:

[0040] 1. Fresh air drive chamber; 11. Fresh air inlet; 111. Fresh air inlet pipe; 12. Fresh air outlet; 13. First fan blade; 2. Dirty air drive chamber; 21. Dirty air inlet; 22. Dirty air outlet; 221. Dirty air outlet pipe; 23. Second fan blade; 31. First drive motor; 32. Second drive motor; 33. Third drive motor; 41. First air door; 42. Second air door; 5. First filter assembly; 51. Filter handle; 511. Handle outer plate; 512. Dirty air inlet; 513. Second filter; 514. Handle position; 52. First Filter element; 53, filter element mounting frame; 101, dirty air side volute; 1011, dirty air volute body; 10111, first fresh air flow hole; 1012, second flow hole; 1013, second volute cover; 10131, fresh air outlet; 102, motor mounting plate; 103, fresh air side volute; 1031, fresh air volute body; 10311, first dirty air flow hole; 10312, second dirty air flow hole; 1032, first flow hole; 1033, first volute cover; 10331, filter element disassembly and assembly channel; 1034, dirty air circulation adapter shell. DETAILED DESCRIPTION

[0041] See also Figures 1 to 12 As shown, according to an embodiment of the present invention, a fresh air device is provided, including a device shell, wherein a fresh air drive chamber 1 and a dirty air drive chamber 2 are constructed in the device shell, wherein the fresh air drive chamber 1 and the dirty air drive chamber 2 are independent of each other, wherein the fresh air drive chamber 1 has a fresh air inlet 11 and a fresh air outlet 12, wherein a first fan blade 13 is arranged in the fresh air drive chamber 1, for driving an airflow, such as a fresh air flow in an external environment, into the fresh air drive chamber 1 via the fresh air inlet 11 and discharging the air into an indoor space via the fresh air outlet 12, wherein the dirty air drive chamber 2 has a dirty air inlet 21 and a dirty air outlet 22, wherein a second fan blade 23 is arranged in the dirty air drive chamber 2, and wherein the second fan blade 23 is used for driving an indoor dirty air flow into the dirty air drive chamber 2 via the dirty air inlet 21 and discharging the indoor dirty air flow into the outdoor environment via the dirty air outlet 22. In this technical solution, the first fan blade 13 and the second fan blade 23 can drive fresh air and indoor polluted air respectively, so that the fresh air device can introduce fresh air from the external environment into the room while discharging indoor polluted air to the outdoor environment, thereby more efficiently improving the indoor air quality. At the same time, since the fresh air driving chamber 1 and the polluted air driving chamber 2 are simultaneously constructed in the device shell, the overall structure of the fresh air device is more compact and occupies less space.

[0042] It can be understood that the first fan blade 13 and the second fan blade 23 both have corresponding driving devices such as driving motors to drive rotation. As a more optimal way, the fresh air device also includes a first driving motor 31, and the first driving motor 31 is a double-shaft motor. The first fan blade 13 and the second fan blade 23 are respectively mounted on the two ends of the power output shaft of the double-shaft motor, thereby making the structure of the fresh air device more compact and reducing the purchase cost of the driving motor. In addition, it can also simplify the design of the electrical control system.

[0043] In some embodiments, the fresh air inlet 11 corresponds to the fresh air inlet pipe 111, the dirty air outlet 22 corresponds to the dirty air outlet pipe 221, and a first damper 41 is provided between the fresh air inlet pipe 111 and the dirty air outlet pipe 221. The first damper 41 has a first position that connects the fresh air inlet pipe 111 with the dirty air outlet pipe 221 and cuts off the fresh air inlet pipe 111 and the dirty air outlet pipe 221 from the external environment, and a second position that cuts off the fresh air inlet pipe 111 from the dirty air outlet pipe 221, wherein the fresh air inlet pipe 111 and The dirty air exhaust pipe 221 is used to connect with the fresh air pipe and the dirty air pipe between the indoor and outdoor areas respectively. The setting of the first damper 41 can form a controllable connection between the dirty air drive chamber 2 and the fresh air drive chamber 1, so that the fresh air device can realize internal circulation in the operation mode. For example, the indoor dirty air is introduced into the fresh air drive chamber 1 after being introduced into the dirty air drive chamber 2 and then discharged. It can be understood that at this time, corresponding air purification components (such as the first filter assembly 5 described below) are set on the air flow paths of the two, so that air purification can be achieved by the dirty air internal circulation. The position switching of the first damper 41 can be controlled by the second drive motor 32.

[0044] In some embodiments, the device shell includes a dirty air side volute 101, a motor mounting plate 102, and a fresh air side volute 103. The dirty air side volute 101 and the motor mounting plate 102 are assembled as one body to form the dirty air drive chamber 2 therebetween. The fresh air side volute 103 and the motor mounting plate 102 are assembled as one body to form the fresh air drive chamber 1 therebetween. The first drive motor 31 is fixedly connected to the motor mounting plate 102 and is located in the fresh air drive chamber 1 or the dirty air drive chamber 2. Sealing treatment should be performed between two adjacent components. The assembly of the dirty air side volute 1011, the motor mounting plate 102, and the fresh air side volute 103 can facilitate the formation of the fresh air drive chamber 1 and the dirty air drive chamber 2. The three components can be separately manufactured by injection molding, which reduces the difficulty of the overall injection molding process.

[0045] As a specific embodiment of the fresh air side volute 103, the fresh air side volute 103 includes a fresh air volute main body 1031, and a first flow hole 1032 is constructed on the fresh air volute main body 1031. The first fan blade 13 is in the first flow hole 1032, and the first flow hole 1032 is connected to a first volute cover 1033 on the side away from the motor mounting plate 102. The fresh air inlet 11 is constructed on the first volute cover 1033. At this time, the fresh air volute main body 1031 and the first volute cover 1033 can be formed respectively by injection molding, thereby further reducing the difficulty of the overall injection molding process.

[0046] The best solution at this time is that a first filter component 5 is provided on the connecting path between the first flow hole 1032 and the fresh air inlet 11, so as to filter and purify the fresh air introduced by the fresh air inlet 11. Furthermore, the first damper 41 is located on the air inlet side of the first flow hole 1032, and the first filter component 5 is also located between the first damper 41 and the first flow hole 1032, that is, at this time, the first filter component 5 can also filter and purify the dirty air introduced by the dirty air exhaust pipe 221. As mentioned above, at this time, the fresh air device operates in the internal circulation mode, which can realize the purification and filtration of the indoor return air and improve the indoor air quality.

[0047] In some embodiments, a filter disassembly channel 10331 is constructed on the first volute cover 1033, and the first filter component 5 is inserted into the filter disassembly channel 10331, so that the first filter component 5 can be loaded, unloaded and replaced without removing the first volute cover 1033, which is more convenient.

[0048] As a specific embodiment of the first filter assembly 5, the first filter assembly 5 includes a filter handle 51, the filter handle 51 has a placement slot (understandably, the placement slot has a ventilation hole), the first filter 52 is placed in the placement slot, the filter handle 51 serves as a placement carrier for the first filter 52, and pulling the filter handle 51 can drive the first filter 52 to enter and exit the fresh air side volute 103. The first filter 52 can be, for example, a HEPA filter.

[0049] In some embodiments, the first filter assembly 5 has two groups, and the filter element disassembly and assembly channels 10331 have two. The two filter element disassembly and assembly channels 10331 are symmetrical to each other on both sides of the first volute cover 1033, and the two groups of the first filter assembly 5 are respectively inserted into the two filter element disassembly and assembly channels 10331 one by one. The two symmetrical first filter assemblies 5 can reduce the operating stroke of the first filter assembly 5 during the disassembly and assembly process, which is particularly suitable for working conditions where the installation space is relatively small.

[0050] A filter element mounting frame 53 is also connected to the side of the fresh air volute body 1031 facing the first volute cover 1033, and the first filter assembly 5 is slidably connected to the side of the filter element mounting frame 53 away from the fresh air volute body 1031. The filter element mounting frame 53 is configured with a plurality of through holes to prevent a large obstruction to the fresh air flow. The filter element mounting frame 53 can support the side of the first filter element 52 facing the second fan blade 23 to prevent the first filter element 52 from being deformed under the fresh air intake pressure.

[0051] The filter handle 51 has a handle outer side plate 511 matching the filter disassembly and assembly channel 10331, and a dirty air inlet 512 connected to the dirty air inlet 21 is configured on the handle outer side plate 511. The dirty air inlet 512 is arranged on the handle outer side plate 511, which can be substantially consistent with the setting orientation of the fresh air inlet 11, which is conducive to improving the appearance of the air conditioner (the fresh air inlet 11 and the dirty air inlet 512 are both arranged on the side of the air conditioner facing away from the user). Furthermore, a handle grip 514 is configured on the handle outer side plate 511, which is conducive to the user's disassembly and assembly of the first filter assembly 5.

[0052] A second filter element 513 is provided in the dirty air inlet 512, and the second filter element 513 can be, for example, a conventional filter net to prevent external cotton wool and particulate dirt from entering the interior of the fresh air device; the fresh air volute body 1031 is also constructed with a first dirty air flow hole 10311 that is connected to the dirty air inlet 21 of the dirty air driving chamber 2, so that the channel for the dirty air circulation is integrated on the fresh air volute body 1031, further improving the structural compactness of the fresh air device.

[0053] In some embodiments, the fresh air device also includes a dirty air circulation adapter shell 1034, and the fresh air volute body 1031 is also constructed with a second dirty air flow hole 10312 connected to the dirty air exhaust port 22 of the dirty air driving chamber 2, and the dirty air circulation adapter shell 1034 is constructed with a first flow hole (not marked in the figure) connected to the second dirty air flow hole 10312 and a second flow hole (not marked in the figure) connected to the dirty air exhaust pipe 221, thereby further improving the structural compactness of the fresh air device.

[0054] As a specific implementation of the dirty air side volute 101, preferably, the dirty air side volute 101 includes a dirty air volute main body 1011, a second flow hole 1012 is constructed on the dirty air volute main body 1011, the second fan blade 23 is in the second flow hole 1012, and the second flow hole 1012 is connected to the side away from the motor mounting plate 102 with a second volute cover 1013. At this time, the dirty air volute main body 1011 and the second volute cover 1013 can be formed respectively by injection molding, thereby further reducing the difficulty of the overall injection molding process.

[0055] In some embodiments, a fresh air outlet 10131 is constructed on the second volute cover 1013, and the fresh air outlet 10131 is connected to the fresh air outlet 12. A second damper 42 is provided at the fresh air outlet 10131. The second damper 42 can be controlled by the drive of the third drive motor 33, for example, to achieve the penetration and closure (cutoff) of the fresh air outlet 10131. Specifically, when the fresh air device is not running, that is, when there is no need for air intake, exhaust or internal circulation, the second damper 42 is controlled to be closed to prevent the entry of outdoor air.

[0056] In order to further improve the structural compactness of the fresh air device, the dirty air volute main body 1011 is also constructed with a first fresh air flow hole 10111 connected to the fresh air outlet 12; and / or the dirty air outlet 22 and / or the dirty air inlet 21 and the fresh air outlet 12 are all constructed on the motor mounting plate 102.

[0057] In some embodiments, the first drive motor 31 , the second drive motor 32 , and the third drive motor 33 are all stepper motors, and the first fan blade 13 and the second fan blade 23 are all centrifugal fan blades.

[0058] According to an embodiment of the present invention, there is also provided an air conditioner, comprising the above-mentioned fresh air device.

[0059] According to an embodiment of the present invention, there is also provided a method for controlling an air conditioner, comprising the following steps:

[0060] Get the operating mode of the air conditioner;

[0061] The positions of the first damper 41 and the second damper 42 are switched according to the operation mode.

[0062] Specifically, Fig.10 and Fig.11 As shown, when the operation mode is the suction and exhaust mode, the first damper 41 is controlled to be in the second position so that the fresh air inlet pipe 111 and the dirty air outlet pipe 221 are independent of each other, and the second damper 42 is controlled to be opened so that the fresh air outlet 10131 is connected. At this time, the fresh air in the external environment passes through the fresh air inlet pipe 111 and the fresh air inlet port 11 in sequence under the drive of the first fan blade 13 into the fresh air driving chamber 1, and passes through the fresh air outlet 12 and the first fresh air flow hole 11 under the drive of the first fan blade 13. 0111, the fresh air outlet 10131 is discharged to the room, and synchronously, the indoor polluted air is driven by the second fan blade 23 and sequentially passes through the polluted air inlet 512, the first polluted air flow hole 10311, and the polluted air introduction port 21 into the polluted air driving chamber 2, and is driven by the second fan blade 23 and discharged to the external environment through the polluted air outlet 22, the second polluted air flow hole 10312, the polluted air circulation adapter shell 1034, and the polluted air discharge pipe 221, thereby realizing the introduction of fresh air and the external discharge of indoor polluted air; or,

[0063] like Fig.11 and Fig.12 As shown, when the operating mode is the internal circulation mode, the first damper 41 is controlled to be in the first position to connect the fresh air inlet pipe 111 with the dirty air outlet pipe 221, and to cut off the fresh air inlet pipe 111 and the dirty air outlet pipe 221 from the external environment, and the second damper 42 is controlled to open to allow the fresh air outlet 10131 to pass through. At this time, the indoor dirty air, driven by the second fan blade 23, passes through the dirty air inlet 512, the first dirty air flow hole 10311, and the dirty air inlet 21 in sequence to enter the dirty air driving chamber 2, and, driven by the second fan blade 23, passes through the dirty air outlet 22, the second dirty air flow hole 10312, the dirty air circulation adapter shell 1034, the dirty air outlet pipe 221, and the first damper 41 to enter the fresh air driving chamber 1, and, driven by the first fan blade 13, passes through the fresh air outlet 12, the first fresh air flow hole 10111, and the fresh air outlet 10131 to be discharged into the room, thereby purifying the indoor air flow.

[0064] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0065] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention. The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention, and these improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A fresh air device, characterized in that: The device comprises a housing, wherein a fresh air drive chamber (1) and a dirty air drive chamber (2) are constructed in the housing, wherein the fresh air drive chamber (1) and the dirty air drive chamber (2) are independent of each other, wherein the fresh air drive chamber (1) has a fresh air inlet (11) and a fresh air outlet (12), wherein a first fan blade (13) is arranged in the fresh air drive chamber (1), wherein the dirty air drive chamber (2) has a dirty air inlet (21) and a dirty air outlet (22), wherein a second fan blade (23) is arranged in the dirty air drive chamber (2); wherein the fresh air inlet (11) is opposite to the fresh air inlet; wherein the fresh air inlet (11) is opposite to the dirty ... The fresh air inlet pipe (111) corresponds to the dirty air outlet (22), and a first air door (41) is provided between the fresh air inlet pipe (111) and the dirty air outlet pipe (221). The first air door (41) has a first position for connecting the fresh air inlet pipe (111) with the dirty air outlet pipe (221) and isolating the fresh air inlet pipe (111) and the dirty air outlet pipe (221) from the external environment, and a first position for connecting the fresh air inlet pipe (111) with the dirty air outlet pipe (221). 1) A second position of truncation; the device housing comprises a dirty air side volute (101), a motor mounting plate (102), and a fresh air side volute (103); the dirty air side volute (101) comprises a dirty air volute body (1011); a second flow hole (1012) is configured on the dirty air volute body (1011); the second fan blade (23) is located in the second flow hole (1012); and a second volute cover (1013) is connected to a side of the second flow hole (1012) away from the motor mounting plate (102). The second volute cover (1013) is provided with a fresh air outlet (10131), the fresh air outlet (10131) is connected to the fresh air outlet (12), and a second damper (42) is provided at the fresh air outlet (10131); when the operation mode of the fresh air device is the suction and exhaust mode, the first damper (41) is in the second position, and the second damper (42) is in the open state; when the operation mode of the fresh air device is the internal circulation mode, the first damper (41) is in the first position, and the second damper (42) is in the open state.

2. The fresh air device according to claim 1, characterized in that: It also comprises a first drive motor (31), the first drive motor (31) being a double-output shaft motor, the first fan blade (13) and the second fan blade (23) being respectively mounted on two ends of a power output shaft of the double-output shaft motor.

3. The fresh air device according to claim 2, characterized in that: The dirty air side volute (101) and the motor mounting plate (102) are assembled as a whole to form the dirty air drive chamber (2) therebetween; the fresh air side volute (103) and the motor mounting plate (102) are assembled as a whole to form the fresh air drive chamber (1) therebetween; the first drive motor (31) is fixedly connected to the motor mounting plate (102) and is located in the fresh air drive chamber (1) or the dirty air drive chamber (2).

4. The fresh air device according to claim 3, characterized in that: The fresh air side volute (103) comprises a fresh air volute main body (1031), a first flow hole (1032) is configured on the fresh air volute main body (1031), the first fan blade (13) is located in the first flow hole (1032), a first volute cover (1033) is connected to a side of the first flow hole (1032) away from the motor mounting plate (102), and the fresh air inlet (11) is configured on the first volute cover (1033).

5. The fresh air device according to claim 4, characterized in that: A first filter assembly (5) is provided on the communication path between the first flow hole (1032) and the fresh air inlet (11).

6. The fresh air device according to claim 5, characterized in that: The first damper (41) is located on the air inlet side of the first through-hole (1032), and the first filter assembly (5) is also located between the first damper (41) and the first through-hole (1032).

7. The fresh air device according to claim 5, characterized in that: A filter element disassembly channel (10331) is constructed on the first volute cover (1033), and the first filter assembly (5) is inserted into the filter element disassembly channel (10331).

8. The fresh air device according to claim 7, characterized in that: The first filter assembly (5) comprises a filter element handle (51), the filter element handle (51) having a placement groove, and the first filter element (52) is placed in the placement groove.

9. The fresh air device according to claim 8, characterized in that: The first filter assembly (5) has two groups, the filter element disassembly and assembly channels (10331) have two groups, the two filter element disassembly and assembly channels (10331) are symmetrically located on both sides of the first volute cover (1033), and the two groups of the first filter assembly (5) are respectively inserted into the two filter element disassembly and assembly channels (10331) in a one-to-one correspondence; and / or, a filter element mounting frame (53) is further connected to a side of the fresh air volute body (1031) facing the first volute cover (1033), and the first filter assembly (5) is slidably connected to a side of the filter element mounting frame (53) facing away from the fresh air volute body (1031).

10. The fresh air device according to claim 8, characterized in that: The filter element handle (51) comprises an outer handle plate (511) matching the filter element disassembly and assembly channel (10331), and the outer handle plate (511) is provided with a dirty air inlet (512) connected to the dirty air inlet (21); and / or the outer handle plate (511) is provided with a handle grip (514).

11. The fresh air device according to claim 10, characterized in that: A second filter element (513) is provided in the dirty air inlet (512); and / or the fresh air volute body (1031) is also provided with a first dirty air flow hole (10311) which is in communication with the dirty air inlet (21) of the dirty air driving chamber (2).

12. The fresh air device according to claim 4, characterized in that: It also includes a dirty air circulation adapter shell (1034), the fresh air volute body (1031) is also configured with a second dirty air flow hole (10312) connected to the dirty air outlet (22) of the dirty air drive chamber (2), the dirty air circulation adapter shell (1034) is configured with a first flow hole connected to the second dirty air flow hole (10312) and a second flow hole connected to the dirty air outlet pipe (221); and / or the dirty air outlet (22) and / or the dirty air inlet (21) are configured on the motor mounting plate (102).

13. The fresh air device according to claim 1, characterized in that: The dirty air volute body (1011) is also provided with a first fresh air flow hole (10111) connected to the fresh air outlet (12); and / or the fresh air outlet (12) is configured on the motor mounting plate (102).

14. An air conditioner, comprising a fresh air device, characterized in that: The fresh air device is the fresh air device according to any one of claims 1 to 13.

15. A method for controlling an air conditioner as claimed in claim 14, characterized in that: The steps include: Get the operating mode of the air conditioner; The positions of the first damper (41) and the second damper (42) are switched according to the operating mode.

16. The control method according to claim 15, characterized in that: When the operation mode is the air intake and exhaust mode, the first damper (41) is controlled to be in the second position so that the fresh air intake pipe (111) and the dirty air exhaust pipe (221) are independent of each other, and the second damper (42) is controlled to be open so that the fresh air outlet (10131) is connected; or, When the operation mode is the internal circulation mode, the first damper (41) is controlled to be in the first position so that the fresh air introduction pipe (111) is connected to the dirty air discharge pipe (221), and the fresh air introduction pipe (111) and the dirty air discharge pipe (221) are cut off from the external environment, and the second damper (42) is controlled to open so that the fresh air outlet (10131) is connected.

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