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 housing, a fresh air drive chamber is constructed in the device housing, the fresh air drive chamber has a fresh air inlet and a fresh air outlet, the fresh air inlet is connected to one end of a fresh air inlet pipe, the other end of the fresh air inlet pipe is connected to an outdoor air outlet assembly, the fresh air inlet of the outdoor air outlet assembly is provided with an outdoor filter, and also comprises an indoor air outlet assembly, the indoor air outlet assembly is constructed with a first air outlet connected to the fresh air outlet and a second air outlet connected to an air supply duct of an indoor unit of the air conditioner, when one of the first air outlet and the second air outlet is in a closed state, the other is in a connected state. According to the present invention, the airflow in the air supply duct can be used to achieve self-cleaning of the outdoor filter, to prevent the adverse effect of dust collection on the fresh air intake, and to reduce the maintenance pressure of the user on the air conditioner.

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] With the improvement of consumer living standards, more and more air conditioners with fresh air ventilation function have begun to enter the consumer market. The current fresh air air conditioners need to expose the fresh air duct to the outdoors to introduce outdoor fresh air. After long-term use, dust is easily accumulated on the pipe mouth. If the user fails to clean the air inlet duct regularly, the accumulated dust will clog the pipe, thereby affecting the air intake volume. 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 in the prior art that the outdoor side pipe opening of the fresh air device is prone to dust accumulation and cannot be cleaned regularly, thereby reducing the fresh air intake volume.

[0004] In order to solve the above problems, the present invention provides a fresh air device, including a device shell, a fresh air driving chamber constructed in the device shell, the fresh air driving chamber having a fresh air inlet and a fresh air outlet, the fresh air inlet is connected to one end of the fresh air inlet pipe, the other end of the fresh air inlet pipe is connected to an outdoor air outlet assembly, the fresh air inlet of the outdoor air outlet assembly is provided with an outdoor filter element, and also includes an indoor air outlet element, the indoor air outlet element is constructed with a first air outlet connected to the fresh air outlet and a second air outlet connected to the air supply duct of the indoor unit of the air conditioner, when one of the first air outlet and the second air outlet is in a closed state, the other is in a through state.

[0005] Preferably, a first damper is provided in the second air outlet, the first damper can be driven to rotate, and has a fresh air discharge position that closes the second air outlet and allows the first air outlet to pass, and a clean air introduction position that closes the first air outlet and allows the second air outlet to pass; and / or, a dust sensor is provided in the outdoor air outlet assembly for detecting the blockage state of the outdoor filter element.

[0006] Preferably, a dirty air driving chamber is also constructed in the device shell, the fresh air driving chamber and the dirty air driving chamber are independent of each other, a first fan blade is provided 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 provided in the dirty air driving chamber.

[0007] Preferably, the dirty air exhaust outlet corresponds to the dirty air exhaust pipe, and a second damper is provided between the fresh air inlet pipe and the dirty air exhaust pipe, the second damper having 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 from the dirty air exhaust pipe.

[0008] 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 cavity therebetween. The fresh air side volute and the motor mounting plate are assembled as one body to form the fresh air drive cavity therebetween. The first drive motor is fixedly connected to the motor mounting plate and is located in the fresh air drive cavity or the dirty air drive cavity.

[0009] 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, the first flow hole is connected to a first volute cover on the side away from the motor mounting plate, and the fresh air inlet is constructed on the first volute cover.

[0010] Preferably, a filter assembly is provided on the communication path between the first flow hole and the fresh air inlet.

[0011] Preferably, the second damper is located on the air inlet side of the first through-hole, and the filter assembly is also located between the second damper and the first through-hole.

[0012] Preferably, a filter element disassembly channel is constructed on the first volute cover, and the filter assembly is inserted into the filter element disassembly channel.

[0013] Preferably, the filter assembly includes a filter element handle, the filter element handle has a placement groove, and the first filter element is placed in the placement groove.

[0014] Preferably, the filter assembly has two groups, and the filter element disassembly and assembly channels have two. The two filter element disassembly and assembly channels are symmetrical to each other and are located on both sides of the first volute cover. The two groups of 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 filter assembly is slidably connected to the side of the filter element mounting bracket facing away from the fresh air volute main body.

[0015] Preferably, the filter element handle has an outer handle plate that matches the filter element disassembly and assembly channel, and the outer handle plate is configured with a dirty air inlet connected to the dirty air inlet port; and / or, the outer handle plate is configured with a handle position.

[0016] 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.

[0017] Preferably, the fresh air device also includes a dirty air circulation adapter shell, and 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, and 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.

[0018] Preferably, the dirty air side volute includes a dirty air volute body, the dirty air volute body is configured with a second through hole, the second fan blade is located in the second through hole, and a second volute cover is connected to the side of the second through hole away from the motor mounting plate.

[0019] Preferably, the dirty air volute body is further constructed with a first fresh air flow hole connected to the fresh air outlet; and / or the fresh air outlet is constructed 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, which is used to control the above-mentioned air conditioner, comprising the following steps:

[0022] After the self-cleaning instruction is obtained, the first air outlet is controlled to be closed, the second air outlet is controlled to be connected, and the fresh air driving cavity and the fresh air introduction pipe are controlled to be connected.

[0023] The present invention provides a fresh air device, an air conditioner and a control method thereof, wherein a first air outlet and a second air outlet connected to a fresh air driving cavity are respectively provided on the indoor air outlet member, and since the second air outlet can be connected with the air supply duct, the supply air flow can be transported to the outdoor filter element in the outdoor air outlet assembly through the fresh air driving cavity and the fresh air inlet pipe when the two are connected, and then the air flow in the air supply duct can be used to realize self-cleaning of the outdoor filter element, thereby preventing the adverse effect of dust collection on the fresh air intake volume, and reducing the maintenance pressure of the user on the air conditioner. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the disassembled structure of the fresh air device according to an embodiment of the present invention (omitting the outdoor air outlet assembly);

[0025] Figure 2 for Figure 1 Schematic diagram of the three-dimensional structure of the dirty air volute body;

[0026] Figure 3 for Figure 1 Schematic diagram of the three-dimensional structure of the motor mounting plate;

[0027] Figure 4 for Figure 1 Schematic diagram of the three-dimensional structure of the fresh air volute main body;

[0028] Figure 5 for Figure 1 A schematic diagram of the three-dimensional structure of the filter element handle;

[0029] Figure 6 for Figure 1 A schematic diagram of the three-dimensional structure of the first volute cover;

[0030] Figure 7 for Figure 1 Schematic diagram of the assembly structure of the fresh air device in one perspective;

[0031] Figure 8 for Figure 1 Schematic diagram of the three-dimensional structure of the dirty air volute body;

[0032] Figure 9 for Figure 1 A schematic diagram of the assembly structure of the fresh air device in another perspective;

[0033] Figure 10 for Figure 9 A side view of section AA, in which the arrows specifically indicate the direction of air flow when the fresh air device introduces fresh air, with the second damper in the second position;

[0034] Figure 11 for Figure 9 The top view of AA in the middle, in which the arrows show the direction of the airflow of the indoor dirty air driven by the second fan blade into the dirty air driving chamber;

[0035] Figure 12 A schematic diagram of the assembly structure of a fresh air device according to an embodiment of the present invention (partially cross-sectional view);

[0036] Figure 13 Schematic diagram of the air flow path of the fresh air device according to an embodiment of the present invention when operating in a fresh air introduction state;

[0037] Figure 14 This is a schematic diagram of the air flow path of the fresh air device according to an embodiment of the present invention when operating in a self-cleaning state.

[0038] The reference numerals indicate:

[0039] 1. Fresh air drive chamber; 11. Fresh air inlet; 111. Fresh air inlet pipe; 12. Fresh air outlet; 13. First fan blade; 2. Sewage air drive chamber; 21. Sewage air inlet; 22. Sewage air outlet; 221. Sewage air outlet pipe; 23. Second fan blade; 31. First drive motor; 32. Second drive motor; 41. Second damper; 5. Filter assembly; 51. Filter handle; 511. Handle outer plate; 512. Dirty air inlet; 513. Second filter element; 514. Handle position; 52. First filter element; 53. Filter mounting bracket; 101. Dirty air side volute; 1011. Dirty air volute body; 10111. First fresh air flow hole; 1012. Second flow hole; 1013. Second volute cover; 102. Motor mounting plate; 103. Fresh air side volute; 1031. Fresh air volute body; 10 311. 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; 200. Air conditioner indoor unit; 201. Air supply duct; 300. Outdoor air outlet assembly; 301. Outdoor filter element; 400. Indoor air outlet element; 401. First air outlet; 402. Second air outlet; 403. First damper; 404. Third drive motor. DETAILED DESCRIPTION

[0040] See also Figures 1 to 14 As shown, according to an embodiment of the present invention, a fresh air device is provided, including a device shell, a fresh air driving chamber 1 is constructed in the device shell, the fresh air driving chamber 1 has a fresh air inlet 11 and a fresh air outlet 12, the fresh air inlet 11 is connected to one end of a fresh air inlet pipe 111, the other end of the fresh air inlet pipe 111 is connected to an outdoor air outlet assembly 300, the fresh air inlet of the outdoor air outlet assembly 300 is provided with an outdoor filter element 301, and also includes an indoor air outlet member 400, the indoor air outlet member 400 is constructed with a first air outlet 401 connected to the fresh air outlet 12 and a second air outlet 402 connected to the air supply duct 201 of the air conditioner indoor unit 200, when one of the first air outlet 401 and the second air outlet 402 is in a closed state, the other is in a through state. In this technical solution, a first air outlet 401 and a second air outlet 402 connected to the fresh air driving chamber 1 are respectively provided on the indoor air outlet member 400. Since the second air outlet 402 can be connected with the air supply duct 201, the supply air flow can be transported to the outdoor filter element 301 in the outdoor air outlet assembly 300 through the fresh air driving chamber 1 and the fresh air inlet pipe 111 when the two are connected, and then the air flow in the air supply duct can be used to achieve self-cleaning of the outdoor filter element 301, thereby preventing the adverse effects of dust collection on the fresh air intake volume, and reducing the maintenance pressure of the user on the air conditioner.

[0041] As a specific embodiment, a first damper 403 is provided in the second air outlet 402, and the first damper 403 can be driven to rotate, and has a fresh air discharge position in which the second air outlet 402 is closed and the first air outlet 401 is connected, and a clean air introduction position in which the first air outlet 401 is closed and the second air outlet 402 is connected. That is, in this technical solution, only the setting of the first damper 403 can satisfy the selection of connecting and closing the first air outlet 401 and the second air outlet 402 at the same time, thereby realizing the switching of the self-cleaning and fresh air functions of the air conditioner. It can be understood that the first damper 403 is controlled by the third drive motor 404; preferably, a dust sensor is provided in the outdoor air outlet assembly 300 for detecting the blockage state of the outdoor filter element 301, and then the operation of the self-cleaning mode can be realized by judging the blockage state, which is more intelligent.

[0042] Preferably, a dirty air driving chamber 2 is also constructed in the device shell, and the fresh air driving chamber 1 and the dirty air driving chamber 2 are independent of each other. The fresh air driving chamber 1 is provided with a first fan blade 13, which is used to drive the airflow, such as the fresh air flow in the external environment, into the fresh air driving chamber 1 through the fresh air inlet 11 and discharge it to the indoor space through the fresh air outlet 12. The dirty air driving chamber 2 has a dirty air inlet 21 and a dirty air outlet 22. The dirty air driving chamber 2 is provided with a second fan blade 23, which is used to drive the indoor dirty air flow into the dirty air driving chamber 2 through the dirty air inlet 21 and discharge it to the outdoor environment through 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 into the outdoor environment, thereby improving the indoor air quality more efficiently. 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.

[0043] 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 better 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 while reducing the purchase cost of the driving motor, and also simplifying the design of the electrical control system.

[0044] 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 second damper 41 is provided between the fresh air inlet pipe 111 and the dirty air outlet pipe 221. The second 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. The dirty air exhaust pipe 221 is respectively used to connect to the fresh air duct and the dirty air duct between the indoor and outdoor spaces. The second damper 41 is provided to establish a controllable connection between the dirty air drive chamber 2 and the fresh air drive chamber 1, thereby enabling the fresh air device to achieve internal circulation in the operating mode. For example, the indoor dirty air is introduced into the dirty air drive chamber 2 and then introduced into the fresh air drive chamber 1 and discharged. It is understandable that at this time, corresponding air purification components (such as the filter assembly 5 described below) are provided in the air flow paths of the two airflows to achieve air purification through the internal circulation of the dirty air. The position switching of the second damper 41 can be controlled by the second drive motor 32.

[0045] 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 into one and form the dirty air drive chamber 2 therebetween. The fresh air side volute 103 and the motor mounting plate 102 are assembled into one and 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. The two adjacent components should be sealed. The assembly of the dirty air side volute 101, 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.

[0046] 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, 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 the side of the motor mounting plate 102 with a first volute cover 1033, and 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, further reducing the difficulty of the overall injection molding process.

[0047] The best thing at this time is that a filter component 5 is provided on the communication 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 second air door 41 is located on the air inlet side of the first flow hole 1032, and the filter component 5 is also located between the second air door 41 and the first flow hole 1032, that is, at this time the filter component 5 can also filter and purify the dirty air introduced by the dirty air exhaust pipe 221. As mentioned above, the fresh air device is running in the internal circulation mode at this time, which can realize the purification and filtration of the indoor return air and improve the indoor air quality.

[0048] In some embodiments, a filter disassembly channel 10331 is constructed on the first volute cover 1033, and the filter assembly 5 is inserted into the filter disassembly channel 10331. The filter assembly 5 can be loaded, unloaded and replaced without removing the first volute cover 1033, which is more convenient.

[0049] As a specific embodiment of the filter assembly 5, the filter assembly 5 includes a filter handle 51 having a placement slot (understandably, the placement slot has ventilation holes), and a first filter 52 is placed in the placement slot. The filter handle 51 serves as a placement carrier for the first filter 52. Pulling the filter handle 51 can move the first filter 52 in and out of the fresh air-side volute 103. The first filter 52 can be, for example, a HEPA filter.

[0050] In some embodiments, the 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 and are located on both sides of the first volute cover 1033. The two groups of filter assemblies 5 are respectively inserted into the two filter element disassembly and assembly channels 10331 one by one. The two symmetrical filter assemblies 5 can reduce the operating stroke of the filter assembly 5 during the disassembly and assembly process, which is particularly suitable for working conditions where the installation space is relatively small.

[0051] The side of the fresh air volute body 1031 facing the first volute cover 1033 is also connected to a filter element mounting bracket 53, and the filter assembly 5 is slidably connected to the side of the filter element mounting bracket 53 away from the fresh air volute body 1031. The filter element mounting bracket 53 is constructed with multiple through holes to prevent a large obstruction to the fresh air flow. The filter element mounting bracket 53 can form a support for 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.

[0052] The filter handle 51 includes an outer handle panel 511 that mates with the filter assembly and removal passage 10331 . A dirty air inlet 512 is configured on the outer handle panel 511 and communicates with the dirty air inlet 21 . Positioning the dirty air inlet 512 on the outer handle panel 511 substantially aligns with the orientation of the fresh air inlet 11 , enhancing the appearance of the air conditioner (both the fresh air inlet 11 and the dirty air inlet 512 are positioned on the side of the air conditioner facing away from the user). Furthermore, a handle grip 514 is configured on the outer handle panel 511 to facilitate user removal and installation of the filter assembly 5 .

[0053] A second filter element 513 is provided in the dirty air inlet 512. 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 into the fresh air volute body 1031, further improving the structural compactness of the fresh air device.

[0054] 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 that is connected to the dirty air exhaust port 22 of the dirty air driving chamber 2. The dirty air circulation adapter shell 1034 is constructed with a first flow hole (not labeled in the figure) that is connected to the second dirty air flow hole 10312 and a second flow hole (not labeled in the figure) that is connected to the dirty air exhaust pipe 221, thereby further improving the structural compactness of the fresh air device.

[0055] 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, and 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 of 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, further reducing the difficulty of the overall injection molding process.

[0056] In order to further improve the structural compactness of the fresh air device, the dirty air volute 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 404 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, a method for controlling the above-mentioned air conditioner includes the following steps:

[0060] After obtaining the self-cleaning instruction, the first air outlet 401 is controlled to be closed, the second air outlet 402 is controlled to be connected, and the fresh air drive chamber 1 and the fresh air inlet pipe 111 are controlled to be connected. At this time, it can be understood that the outlet airflow in the air supply duct 201 will be introduced into the fresh air drive chamber 1 through the second air outlet 402 and then enter the outdoor air outlet assembly 300 along the fresh air inlet pipe 111, thereby forming a backblowing on the outdoor filter element 301, realizing self-cleaning of the outdoor air outlet assembly 300. During this process, the first fan blade 13 and the second fan blade 23 do not rotate, and the power of the cleaning airflow comes from the drive of the air supply fan of the air conditioner indoor unit.

[0061] The self-cleaning instruction can be a user's selection instruction. Preferably, the control component automatically determines whether to enter the self-cleaning mode based on the detection result of the dust sensor, and then issues a corresponding self-cleaning instruction to realize the self-cleaning of the outdoor filter element 301.

[0062] The air conditioner control method may further include the following steps:

[0063] Get the operating mode of the air conditioner;

[0064] The positions of the second damper 41 and the first damper 403 are controlled to switch according to the operation mode.

[0065] Specifically, such as Figure 10 and Figure 11As shown, when the operating mode is the suction and exhaust mode, the second 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. 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 and enters the fresh air driving chamber 1, and is driven by the first fan blade 13 through the fresh air outlet 12, the first fresh air flow hole 10111, and the first air outlet 401 to be discharged into the room, and at the same time In step 1, the indoor polluted air is driven by the second fan blade 23 and passes through the polluted air inlet 512, the first polluted air flow hole 10311 and the polluted air inlet 21 in sequence 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 exhaust pipe 221, thereby realizing the introduction of fresh air and the discharge of indoor polluted air. At this time, the first damper 403 is in the fresh air exhaust position.

[0066] 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.

[0067] The above are merely 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 within the scope of protection of the present invention. The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art may make various improvements and variations without departing from the technical principles of the present invention, and such improvements and variations shall also be considered within the scope of protection 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) is constructed in the housing, wherein the fresh air drive chamber (1) has a fresh air inlet (11) and a fresh air outlet (12), wherein the fresh air inlet (11) is connected to one end of a fresh air inlet pipe (111), wherein the other end of the fresh air inlet pipe (111) is connected to an outdoor air outlet assembly (300), wherein an outdoor filter element (301) is provided at the fresh air inlet of the outdoor air outlet assembly (300), and further comprises an indoor air outlet assembly (400), wherein the indoor air outlet assembly (400) is provided with a filter element (301) connected to the fresh air outlet. The air outlet (401) is connected to a first air outlet (401) connected to a fresh air outlet (12) and a second air outlet (402) connected to an air supply duct (201) of an indoor unit (200) of the air conditioner, wherein when one of the first air outlet (401) and the second air outlet (402) is in a closed state, the other is in a connected state, so that when the second air outlet (402) is connected to the air supply duct (201), the supply air flow can be transported to the outdoor filter element (300) in the outdoor air outlet assembly (300) through the fresh air drive chamber (1) and the fresh air introduction pipe (111). 1); a first damper (403) is provided in the second air outlet (402); the first damper (403) can be driven to rotate and has a fresh air discharge position where the second air outlet (402) is closed and the first air outlet (401) is connected, and a clean air introduction position where the first air outlet (401) is closed and the second air outlet (402) is connected; a dirty air drive chamber (2) is also constructed in the housing of the device; the fresh air drive chamber (1) and the dirty air drive chamber (2) are independent of each other; the dirty air drive chamber (2) has a dirty air introduction port (21), a dirty air introduction port (22), and a clean air introduction port (23). An air outlet (22), the dirty air outlet (22) corresponding to the dirty air outlet pipe (221), a second air door (41) being provided between the fresh air intake pipe (111) and the dirty air outlet pipe (221), the second air door (41) having a first position for connecting the fresh air intake pipe (111) and the dirty air outlet pipe (221) and for disconnecting the fresh air intake pipe (111) and the dirty air outlet pipe (221) from the external environment, and a second position for disconnecting the fresh air intake pipe (111) and the dirty air outlet pipe (221).

2. The fresh air device according to claim 1, characterized in that: The outdoor air outlet assembly (300) is provided with a dust sensor for detecting the blockage state of the outdoor filter element (301).

3. The fresh air device according to claim 1, characterized in that: A first fan blade (13) is provided in the fresh air driving chamber (1), and a second fan blade (23) is provided in the dirty air driving chamber (2).

4. The fresh air device according to claim 3, characterized in that: The housing of the device 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) 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; and a 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).

5. The fresh air device according to claim 4, 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).

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

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

8. The fresh air device according to claim 6, characterized in that: A filter element disassembly channel (10331) is configured on the first volute cover (1033), and the filter assembly (5) is inserted into the filter element disassembly channel (10331).

9. The fresh air device according to claim 8, characterized in that: The 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.

10. The fresh air device according to claim 9, characterized in that: The 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 filter assemblies (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 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).

11. The fresh air device according to claim 9, 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).

12. The fresh air device according to claim 11, 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).

13. The fresh air device according to claim 5, 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).

14. The fresh air device according to claim 4, characterized in that: The dirty air side volute (101) comprises a dirty air volute main body (1011), a second flow hole (1012) is configured on the dirty air volute main 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).

15. The fresh air device according to claim 14, 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).

16. 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 15.

17. A method for controlling an air conditioner, characterized in that: Used to control the air conditioner according to claim 16, comprising the following steps: After obtaining the self-cleaning instruction, the first air outlet (401) is controlled to be closed, the second air outlet (402) is controlled to be connected, and the fresh air driving chamber (1) and the fresh air introduction pipe (111) are controlled to be connected.

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