Fresh air system, its control method, and air conditioner

Abstract

The present application provides a fresh air system, a control method thereof, and an air conditioner. The fresh air system includes a rear cover, a rear bottom case, a pressing plate, a front bottom case, and a front cover that are sequentially connected. A first flow channel and a second flow channel that are spaced apart from each other are formed between the rear cover, the rear bottom case, the pressing plate, the front bottom case, and the front cover. An air duct switching structure is provided between the rear cover and the rear bottom case. When the air duct switching structure is in the first position, a first outdoor communication port and a second outdoor communication port are closed, and the first flow channel and the second flow channel are connected. When the air duct switching structure is in the second position, the first flow channel and the second flow channel are separated, the first outdoor communication port is connected to the first flow channel, and the second outdoor communication port is connected to the second flow channel. According to the fresh air system of the present application, the functions of the fresh air system can be diversified, and can be adjusted according to the needs of users, improving the user experience.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and particularly relates to a fresh air system, a control method thereof, and an air conditioner. 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 air quality in the room. Air conditioners with fresh air functions have gradually emerged on the market. At present, the fresh air functions of air conditioners on the market mainly include: 1. Purifying the dirty air in the room; 2. Discharging the purified outdoor air into the room and discharging the dirty air in the room to the outside.

[0003] Known air conditioners can only achieve a single function, resulting in a single function of the air conditioner, unable to be adjusted according to the needs of users, and reducing the user experience. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present application is to provide a fresh air system, a control method thereof, and an air conditioner, which can diversify the functions of the fresh air system, can be adjusted according to the needs of users, and improve the user experience.

[0005] To solve the above problems, the present application provides a fresh air system, including a rear cover, a rear bottom shell, a pressing plate, a front bottom shell, and a front cover connected in sequence. A first flow channel and a second flow channel are formed between the rear cover, the rear bottom shell, the pressing plate, the front bottom shell, and the front cover, and are spaced apart from each other. The fresh air system further includes an indoor air suction port and an indoor air discharge port. The first flow channel is communicated with the indoor air suction port, and the second flow channel is communicated with the indoor air discharge port. A first outdoor communication port and a second outdoor communication port are provided on the rear cover. An air duct switching structure is provided between the rear cover and the rear bottom shell. When the air duct switching structure is in the first position, the first outdoor communication port and the second outdoor communication port are closed, and the first flow channel and the second flow channel are communicated. When the air duct switching structure is in the second position, the first flow channel and the second flow channel are separated, the first outdoor communication port is communicated with the first flow channel, and the second outdoor communication port is communicated with the second flow channel.

[0006] Preferably, a first air blade is provided in the first flow channel, and a second air blade is provided in the second flow channel. The spaces where the first air blade and the second air blade are located are spaced apart.

[0007] Preferably, the first air blade is located in the space formed between the pressing plate and the front bottom shell, the second air blade is located in the space formed between the pressing plate and the rear bottom shell, and the first air blade and the second air blade are separated by the pressing plate.

[0008] Preferably, the first air blade and the second air blade are driven and connected by a double-axis motor.

[0009] Preferably, a cover plate is provided between the rear cover and the rear bottom case. The cover plate is provided with a first air passage, and the first air passage forms part of the first flow passage. The cover plate is further provided with a communication passage. The air duct switching structure includes a runner and an adjusting plate. The runner is rotatably provided on the rear cover, and the adjusting plate is rotatable relative to the communication passage. The runner is provided with a first communication hole and a second communication hole, and the first communication hole and the second communication hole are located on both sides of the adjusting plate. When the air duct switching structure is in the first position, the adjusting plate opens the communication passage, and the runner closes the first outdoor communication port and the second outdoor communication port. When the air duct switching structure is in the second position, the adjusting plate closes the communication passage, the first communication hole of the runner communicates with the first outdoor communication port, and the second communication hole of the runner communicates with the second outdoor communication port.

[0010] Preferably, the adjusting plate is fixedly connected to the runner, and a third driving motor is provided on the rear cover. The third driving motor is fixedly connected to the runner to drive the rotational position of the runner.

[0011] Preferably, a filter is provided between the first outdoor communication port and the rear bottom case. The filter is located in the second flow passage and is provided on the side close to the indoor air discharge port at the communication position between the first flow passage and the second flow passage.

[0012] Preferably, the front bottom case includes a first air blade installation space and a second air passage. The first air blade installation space and the second air passage are separated by a partition. The first air blade installation space is located on the path of the first flow passage, and the second air passage forms part of the second flow passage.

[0013] Preferably, the pressing plate is provided with a third air passage, a fourth air passage and an avoidance opening. The third air passage, the fourth air passage and the avoidance opening are spaced apart. The third air passage communicates with the air inlet of the first air blade and the indoor air suction port, and the fourth air passage communicates with the air outlet of the first air blade. Both the third air passage and the fourth air passage form part of the first flow passage, and the avoidance opening forms part of the second flow passage.

[0014] Preferably, the rear bottom case includes a second air blade installation space. The second air blade is arranged in the second air blade installation space. The rear bottom case is further provided with a fifth air passage and an air outlet passage. The fifth air passage is isolated from the second air blade installation space and the air outlet passage. The air outlet passage is communicated with the second air blade installation space. The conveyed fifth air passage forms part of the first flow passage, and the second air blade installation space and the air outlet passage form part of the second flow passage.

[0015] Preferably, a second air guide plate and a second driving motor are provided at the indoor air suction inlet. The second driving motor drives the second air guide plate to rotate. When the second air guide plate is in the first position, the indoor air suction inlet is opened, and the first flow channel and the second flow channel are spaced apart at the indoor air suction inlet. When the second air guide plate is in the second position, the indoor air suction inlet is closed, and the first flow channel and the second flow channel are communicated at the indoor air suction inlet.

[0016] Preferably, the air duct switching structure further includes a third position. When the air duct switching structure is in the third position, the first flow channel and the second flow channel are communicated, the first outdoor communication port is communicated with the first flow channel, and the second outdoor communication port is communicated with the second flow channel. The second air guide plate is in the second position.

[0017] Preferably, the air duct switching structure further includes a third position. A third communication hole and a fourth communication hole are further provided on the runner. When the air duct switching structure is in the third position, the regulating plate opens the communication channel, the third communication hole of the runner is communicated with the first outdoor communication port, and the fourth communication hole of the runner is communicated with the second outdoor communication port.

[0018] Preferably, the air duct switching structure further includes a third position. An auxiliary air exhaust port is provided at the top of the front bottom case. A first air guide plate and a first driving motor are provided at the auxiliary air exhaust port. The first driving motor is drivingly connected to the first air guide plate to drive the first air guide plate to swing. When the air duct switching structure is in the first position and the second position, the first air guide plate is in the first position, closing the auxiliary air exhaust port and opening the fifth air passing channel. When the air duct switching structure is in the third position, the first air guide plate is in the second position, opening the auxiliary air exhaust port and closing the fifth air passing channel.

[0019] According to another aspect of the present application, an air conditioner is provided, including a fresh air system, and the fresh air system is the above-mentioned fresh air system.

[0020] According to another aspect of the present application, a control method for the above-mentioned fresh air system is provided, including:

[0021] Obtaining the working mode of the fresh air system;

[0022] When the fresh air system is in the internal circulation mode, control the air duct switching structure to be in the first position, so that the first outdoor communication port and the second outdoor communication port are closed, the first flow channel and the second flow channel are communicated, and the indoor air reaches the air duct switching structure from the indoor air suction inlet through the first flow channel, enters the second flow channel, and then is discharged from the indoor air discharge outlet along the second flow channel;

[0023] When the fresh air system is in the air intake and exhaust mode, control the air duct switching structure to be in the second position, separate the first flow channel and the second flow channel, connect the first outdoor communication port with the first flow channel, connect the second outdoor communication port with the second flow channel, discharge the outdoor air from the indoor air exhaust port through the second outdoor communication port and the second flow channel, and discharge the indoor air from the first outdoor communication port through the first flow channel to the outside.

[0024] Preferably, the control method further includes:

[0025] When the fresh air system is in the double air intake and double exhaust mode, control the first air deflector to be in the second position, open the auxiliary exhaust port and close the fifth air passage, control the second air deflector to be in the second position to close the indoor air intake port, connect the first flow channel and the second flow channel at the indoor air intake port, control the air duct switching structure to be in the third position, connect the first flow channel and the second flow channel, connect the first outdoor communication port with the first flow channel, connect the second outdoor communication port with the second flow channel, the outdoor air enters the rear bottom case through the first outdoor communication port and the second outdoor communication port, and is divided into two parts at the air inlet of the second air blade. One part enters the second air blade and then is discharged into the room from the indoor air exhaust port along the second flow channel, and the other part enters the first air blade along the first flow channel and is then discharged into the room through the auxiliary exhaust port.

[0026] The fresh air system provided by the present application includes a rear cover, a rear bottom case, a pressing plate, a front bottom case and a front cover connected in sequence. A first flow channel and a second flow channel which are spaced apart from each other are formed between the rear cover, the rear bottom case, the pressing plate, the front bottom case and the front cover. The fresh air system further includes an indoor air intake port and an indoor air exhaust port. The first flow channel is connected with the indoor air intake port, the second flow channel is connected with the indoor air exhaust port. The rear cover is provided with a first outdoor communication port and a second outdoor communication port. An air duct switching structure is provided between the rear cover and the rear bottom case. When the air duct switching structure is in the first position, the first outdoor communication port and the second outdoor communication port are closed, and the first flow channel and the second flow channel are connected. When the air duct switching structure is in the second position, the first flow channel and the second flow channel are separated, the first outdoor communication port is connected with the first flow channel, and the second outdoor communication port is connected with the second flow channel. The fresh air system can adjust the connection state between the flow channels and between the flow channels and the outdoor communication ports through the air duct switching structure, so as to realize a variety of different working modes, diversify the functions of the fresh air system, and can be adjusted according to the needs of users, improving the user experience. Description of the Drawings

[0027] Figure 1 is a schematic exploded view of the fresh air system according to the embodiment of the present application;

[0028] Figure 2Schematic diagram of the three-dimensional structure of the fresh air system according to the embodiment of the present application;

[0029] Figures 3 to 6 Air flow path diagram of the fresh air system according to the embodiment of the present application in the internal circulation mode;

[0030] Figures 7 to 10 Air flow path diagram of the fresh air system according to the embodiment of the present application in the air intake and exhaust mode;

[0031] Figures 11 to 14 Air flow path diagram of the fresh air system according to the embodiment of the present application in the double air intake and double exhaust mode;

[0032] Figure 15 Control flow chart of the fresh air system according to the embodiment of the present application.

[0033] The reference numerals are shown as:

[0034] 1. Front cover; 2. Front bottom case; 3. First air deflector; 4. First driving motor; 5. First wind blade; 6. Biaxial motor; 7. Pressure plate; 8. Second wind blade; 9. Rear bottom case; 10. Cover plate; 11. Second driving motor; 12. Second air deflector; 13. Filter; 14. Rotor; 15. Rear cover; 16. Third driving motor; 17. Indoor air intake port; 18. Indoor air exhaust port; 19. First outdoor communication port; 20. Second outdoor communication port; 21. First air passage; 22. Second air passage; 23. Third air passage; 24. Fourth air passage; 25. Fifth air passage; 26. Communication passage; 27. Adjusting plate; 28. First communication hole; 29. Second communication hole; 30. Third communication hole; 31. Fourth communication hole; 32. Avoidance opening; 33. Air outlet passage; 34. Auxiliary exhaust port. Detailed implementation manners

[0035] With reference to Figures 1 to 14As shown, according to an embodiment of the present application, the fresh air system includes a rear cover 15, a rear bottom case 9, a pressing plate 7, a front bottom case 2, and a front cover 1 connected in sequence. A first flow channel and a second flow channel that are spaced apart from each other are formed between the rear cover 15, the rear bottom case 9, the pressing plate 7, the front bottom case 2, and the front cover 1. The fresh air system further includes an indoor air suction port 17 and an indoor air discharge port 18. The first flow channel is communicated with the indoor air suction port 17, and the second flow channel is communicated with the indoor air discharge port 18. A first outdoor communication port 19 and a second outdoor communication port 20 are provided on the rear cover 15. A duct switching structure is provided between the rear cover 15 and the rear bottom case 9. When the duct switching structure is in the first position, the first outdoor communication port 19 and the second outdoor communication port 20 are closed, and the first flow channel and the second flow channel are communicated. When the duct switching structure is in the second position, the first flow channel and the second flow channel are separated, the first outdoor communication port 19 is communicated with the first flow channel, and the second outdoor communication port 20 is communicated with the second flow channel.

[0036] This fresh air system can adjust the connection state between the flow channels and between the flow channels and the outdoor communication ports through the duct switching structure, so that multiple different working modes can be realized, the functions of the fresh air system are diversified, and it can be adjusted according to the needs of users, improving the user experience.

[0037] A first air blade 5 is arranged in the first flow channel, and a second air blade 8 is arranged in the second flow channel. The spaces where the first air blade 5 and the second air blade 8 are located are spaced apart. The first air blade 5 is used to provide power for the air flow in the first flow channel, and the second air blade 8 is used to provide power for the air flow in the second flow channel. The spaces where they are located are spaced apart, so that the two air blades do not affect each other, so that the first flow channel and the second flow channel can be independently controlled respectively, and the air flow in different flow channels can be realized.

[0038] The first air blade 5 is located in the space formed between the pressing plate 7 and the front bottom case 2, and the second air blade 8 is located in the space formed between the pressing plate 7 and the rear bottom case 9. The first air blade 5 and the second air blade 8 are separated by the pressing plate 7. In this embodiment, since both the front bottom case 2 and the rear bottom case 9 are shell structures with a certain thickness, enough space can be provided for the arrangement of the air blades. In this way, the pressing plate 7 only needs to separate the space where the first air blade 5 is located and the space where the second air blade 8 is located, and a simple flat plate can be used, and the processing is also simpler and more convenient.

[0039] The above-mentioned first air blade 5 and second air blade 8 are, for example, centrifugal air blades or mixed-flow air blades, which can reduce the overall axial length of the fresh air system, greatly reduce the overall volume of the fresh air system, facilitate the miniaturization of the fresh air system, make the structure more compact, and have better noise control. If the influence of volume and noise is not considered, using axial-flow air blades is also a feasible solution.

[0040] In one embodiment, the first wind blade 5 and the second wind blade 8 are drivingly connected by a dual-axis motor 6, and one motor can be used to drive the two wind blades to rotate simultaneously. Therefore, the number of motors can be reduced, the motor cost can be lowered, and the volume of the fresh air system can be further reduced.

[0041] To facilitate the support of the dual-axis motor 6, a motor mounting groove can also be provided on the pressing plate 7, so that one end of the dual-axis motor 6 is supported on the front bottom shell 2, and the other end is supported on the pressing plate 7, forming a more stable and reliable mounting structure.

[0042] A cover plate 10 is provided between the rear cover 15 and the rear bottom shell 9. The cover plate 10 is provided with a first air passage 21, and the first air passage 21 forms a part of the first flow passage. The cover plate 10 is also provided with a communication passage 26. The air duct switching structure includes a runner 14 and an adjusting plate 27. The runner 14 is rotatably provided on the rear cover 15, and the adjusting plate 27 can rotate relative to the communication passage 26. The runner 14 is provided with a first communication hole 28 and a second communication hole 29. The first communication hole 28 and the second communication hole 29 are located on both sides of the adjusting plate 27. When the air duct switching structure is in the first position, the adjusting plate 27 opens the communication passage 26, and the runner 14 closes the first outdoor communication port 19 and the second outdoor communication port 20. When the air duct switching structure is in the second position, the adjusting plate 27 closes the communication passage 26, the first communication hole 28 of the runner 14 communicates with the first outdoor communication port 19, and the second communication hole 29 of the runner 14 communicates with the second outdoor communication port 20.

[0043] By adjusting the rotation position of the runner 14, the connection relationship between the outdoor communication port and the flow passage can be adjusted. By adjusting the rotation position of the adjusting plate 27, the connection state between the first flow passage and the second flow passage can be adjusted. The combination of the two can conveniently realize the switching between the internal circulation mode and the air intake and exhaust mode.

[0044] In one embodiment, the adjusting plate 27 is fixedly connected to the runner 14, and a third driving motor 16 is provided on the rear cover 15. The third driving motor 16 is fixedly connected to the runner 14 to drive the rotation position of the runner 14. In this way, only by reasonably setting the relative position between the adjusting plate 27 and the runner 14, and then only by driving the runner 14 to rotate through the third driving motor 16, the rotation position adjustment of the adjusting plate 27 can be realized simultaneously. The structure is simpler, the adjustment is more convenient, and the driving mechanism can be saved, the volume occupation can be reduced, and the cost can be lowered.

[0045] A filter 13 is provided between the first outdoor connection port 19 and the rear bottom case 9. The filter 13 is located within the second flow channel and is disposed on the side of the connection position between the first flow channel and the second flow channel that is closer to the indoor air discharge outlet 18. By arranging the filter 13 on the side of the connection position between the first flow channel and the second flow channel that is closer to the indoor air discharge outlet 18, when the fresh air system is in the internal circulation mode, the indoor air can flow through the filter 13 during the process of entering the second flow channel from the first flow channel, so as to filter and purify the indoor air. The filtered and purified indoor air is discharged back into the room again from the second flow channel through the indoor air discharge outlet 18.

[0046] The front bottom case 2 includes a first wind blade installation space and a second air passage 22. The first wind blade installation space and the second air passage 22 are separated by a partition. The first wind blade installation space is located on the path of the first flow channel, and the second air passage 22 forms a part of the second flow channel. By respectively providing the mutually separated first wind blade installation space and the second air passage 22 on the front bottom case 2, the first flow channel on the air inlet side and the air outlet side of the first wind blade 5 can be connected through the first wind blade installation space. By providing the second air passage 22, it can be ensured that the second flow channel can smoothly pass through the front bottom case 2 to reach the front cover 1, and the intersection between the first flow channel and the second flow channel can be avoided. The connection state can only be adjusted at the air duct switching structure, which is more convenient for adjusting the working mode of the fresh air system.

[0047] The pressing plate 7 is provided with a third air passage 23, a fourth air passage 24, and an avoidance opening 32. The third air passage 23, the fourth air passage 24, and the avoidance opening 32 are spaced apart. The third air passage 23 is connected to the air inlet of the first wind blade 5 and the indoor air suction inlet 17, and the fourth air passage 24 is connected to the air outlet of the first wind blade 5. Both the third air passage 23 and the fourth air passage 24 form a part of the first flow channel, and the avoidance opening 32 forms a part of the second flow channel. By providing the third air passage 23 and the fourth air passage 24 on the pressing plate 7, the air inlet of the first wind blade 5 and the indoor air suction inlet 17 can be connected through the third air passage 23, and the air outlet of the first wind blade 5 and the first air passage 21 can be connected through the fourth air passage 24. Thus, while enabling the first flow channel to be connected, the intersection between the first flow channels at different nodes can be avoided, ensuring that the first flow channel can form a preset air path and meeting the working mode adjustment requirements of the fresh air system.

[0048] The rear bottom shell 9 includes a second wind blade installation space, the second wind blade 8 is arranged in the second wind blade installation space, and a fifth air passing channel 25 and an air outlet channel 33 are also arranged on the rear bottom shell 9. The fifth air passing channel 25 is isolated from the second wind blade installation space and the air outlet channel 33, and the air outlet channel 33 is communicated with the second wind blade installation space. The conveyed fifth air passing channel 25 forms a part of the first flow channel, and the second wind blade installation space and the air outlet channel 33 form a part of the second flow channel.

[0049] The fifth air passing channel 25 therein is communicated with the fourth air passing channel 24 and is isolated from the second wind blade installation space and the air outlet channel 33, which can not only ensure the integrity of the first flow channel, but also avoid the connection of the first flow channel and the second flow channel in other places except the air duct switching structure, ensuring the accuracy and reliability of the fresh air system control.

[0050] Since the second wind blade installation space is communicated with the avoidance opening 32 and the second air passing channel 22 through the fifth air passing channel 25, the air outlet of the second wind blade 8 can bypass the first flow channel and directly reach the indoor air discharge outlet 18 from the second flow channel and be discharged to the indoor from the indoor air discharge outlet 18.

[0051] In one embodiment, a second air guiding plate 12 and a second driving motor 11 are arranged at the indoor air suction inlet 17. The second driving motor 11 drives the second air guiding plate 12 to rotate. When the second air guiding plate 12 is in the first position, the indoor air suction inlet 17 is opened, and the first flow channel and the second flow channel are spaced apart at the indoor air suction inlet 17. When the second air guiding plate 12 is in the second position, the indoor air suction inlet 17 is closed, and the first flow channel and the second flow channel are communicated at the indoor air suction inlet 17.

[0052] The arrangement of the second air guiding plate 12 can conveniently adjust the opening and closing state of the indoor air suction inlet 17, so that the first wind blade 5 and the second wind blade 8 can be switched between the parallel and series states, can be selected according to needs, and cooperate with the air duct switching structure to realize the adjustment of different working modes of the fresh air system.

[0053] The air duct switching structure further includes a third position. When the air duct switching structure is in the third position, the first flow channel and the second flow channel are communicated, the first outdoor communication port 19 is communicated with the first flow channel, and the second outdoor communication port 20 is communicated with the second flow channel. The second air guiding plate 12 is in the second position. In this state, since both the first flow channel and the second flow channel are communicated with the outdoor, outdoor air can enter through the two communication ports at the same time, which can greatly increase the air intake volume of outdoor air entering the indoor.

[0054] In one embodiment, the air duct switching structure further includes a third position. The runner 14 is further provided with a third communication hole 30 and a fourth communication hole 31. When the air duct switching structure is in the third position, the regulating plate 27 opens the communication channel 26. The third communication hole 30 of the runner 14 communicates with the first outdoor communication port 19, and the fourth communication hole 31 of the runner 14 communicates with the second outdoor communication port 20. In this case, the incoming air at the first outdoor communication port 19 and the second outdoor communication port 20 can be in series. After the incoming air at the two communication ports is mixed, it is filtered and purified by the filter 13, and then under the combined action of the first air blade 5 and the second air blade 8, it is sent into the room from the indoor air discharge port 18, effectively increasing the indoor incoming air volume.

[0055] In one embodiment, the air duct switching structure further includes a third position. The front bottom shell 2 is provided with an auxiliary air discharge port 34 at the top. A first air deflector 3 and a first driving motor 4 are arranged at the auxiliary air discharge port 34. The first driving motor 4 is drivingly connected to the first air deflector 3 to drive the first air deflector 3 to swing. When the air duct switching structure is in the first position and the second position, the first air deflector 3 is in the first position, closing the auxiliary air discharge port 34 and opening the fifth air passing channel 25. When the air duct switching structure is in the third position, the first air deflector 3 is in the second position, opening the auxiliary air discharge port 34 and closing the fifth air passing channel 25.

[0056] In this embodiment, the incoming air at the first outdoor communication port 19 enters the second flow channel through the first air passing channel 21 and the communication channel 26, and after being mixed with the incoming air at the second outdoor communication port 20, it enters the filter 13 for filtering and purification. Since the second air deflector 12 is in the second position at this time, the indoor air suction port 17 is closed, and the first flow channel and the second flow channel communicate at the indoor air suction port 17, and the first air blade 5 and the second air blade 8 form a parallel structure. Since the first air deflector 3 is in the second position, the auxiliary air discharge port 34 is opened at this time, the fifth air passing channel 25 is closed, and the first flow channel is closed at the fifth air passing channel 25 and is changed to communicate with the auxiliary air discharge port 34. After the air flow is filtered and purified by the filter 13, it is divided into two parts. One part enters the second air blade 8 and then is discharged into the room from the indoor air discharge port 18 along the second flow channel, and the other part enters the first air blade 5 along the first flow channel and is then discharged into the room through the auxiliary air discharge port 34.

[0057] According to an embodiment of the present application, the air conditioner includes a fresh air system, and this fresh air system is the above-mentioned fresh air system.

[0058] Combined with reference to Figures 3 to 15As shown, according to an embodiment of the present application, the first wind blade 5 and the second wind blade 8 are driven and controlled by a dual-axis motor 6, and the opening and closing of the first wind blade 5 and the second wind blade 8 can be realized; the first air deflector 3 is driven and controlled by a first driving motor 4, and the switching between the first position and the second position of the first air deflector 3 can be realized; the second air deflector 12 is driven and controlled by a second driving motor 11, and the switching between the first position and the second position of the second air deflector 12 can be realized; the runner 14 is driven and controlled by a third driving motor 16, and the switching between the first position, the second position and the third position of the runner 14 can be realized. When the first air deflector 3, the second air deflector 12 and the runner 14 are in different positions, the switching between the internal circulation mode, the air intake and exhaust mode and the double air intake and double exhaust mode of the fresh air system can be realized. The internal circulation mode can realize the filtration and purification of indoor dirty air; the air intake and exhaust mode can realize the discharge of indoor dirty air and the intake of outdoor dirty air after filtration and purification; the double air intake and double exhaust mode can realize the entry of outdoor dirty air through multiple air inlets, and then after being filtered and purified by the filter screen, it is discharged into the room through multiple air outlets, increasing the air intake volume of outdoor air entering the room.

[0059] The control method of the above fresh air system includes: obtaining the working mode of the fresh air system; when the fresh air system is in the internal circulation mode, controlling the air duct switching structure to be in the first position, closing the first outdoor communication port 19 and the second outdoor communication port 20, connecting the first flow channel and the second flow channel, and indoor air enters from the indoor air suction port 17, passes through the first flow channel to reach the air duct switching structure, enters the second flow channel, and then is discharged from the indoor air discharge port 18 along the second flow channel.

[0060] Combined with reference to Figures 3 to 6 As shown, when the internal circulation mode of the fresh air system is turned on, the dual-axis motor 6 is started, the first wind blade 5 and the second wind blade 8 are turned on, the first air deflector 3 is in the first position, the second air deflector 12 is in the first position, and the runner 14 is in the first position. The dirty air in the room enters the channel formed by the rear cover 15, the rear bottom shell 9, the pressing plate 7 and the front bottom shell 2 through the indoor air suction port 17, then enters the air duct space formed by the front cover 1 and the front bottom shell 2, and then through the rotation of the first wind blade 5, the dirty air is transported through the flow channel formed by the front bottom shell 2, the pressing plate 7 and the rear bottom shell 9 to the space formed by the cover plate 10 and the rear cover 15. The rear cover 15 is designed with a filter 13, and the dirty air is purified and filtered by the filter 13 to form clean air. The clean air enters the air duct space formed by the rear bottom shell 9 and the pressing plate 7, and then through the rotation of the second wind blade 8, the clean air is transported to the channel formed by the rear bottom shell 9, the pressing plate 7, the front bottom shell 2 and the front cover 1, and finally the clean air is discharged into the room through the indoor air discharge port 18.

[0061] When the fresh air system is in the air intake and exhaust mode, control the air duct switching structure to be in the second position, separate the first flow channel and the second flow channel, connect the first outdoor communication port 19 with the first flow channel, and connect the second outdoor communication port 20 with the second flow channel. Outdoor air is discharged from the indoor air exhaust outlet 18 through the second outdoor communication port 20 and the second flow channel, and indoor air is discharged outdoors through the first flow channel from the first outdoor communication port 19.

[0062] Combined with reference to Figures 7 to 10 As shown, when the fresh air system's air intake and exhaust mode is turned on, the dual-axis motor 6 starts, the first wind blade 5 and the second wind blade 8 are turned on, the first air deflector 3 is in the first position, the second air deflector 12 is in the first position, and the runner 14 rotates to the second position. Outdoor dirty air enters the space formed by the rear cover 15 and the rear bottom shell 9 through the second outdoor communication port 20. The rear cover 15 is designed with a filter 13. The dirty air is purified and filtered by the filter 13 to form clean air. The clean air enters the air duct space formed by the rear bottom shell 9 and the pressing plate 7, and then the clean air is transported to the channel formed by the rear bottom shell 9, the pressing plate 7, the front bottom shell 2, and the front cover 1 by the rotation of the second wind blade 8. Finally, the clean air is discharged into the room through the first outdoor communication port 19; Indoor dirty air enters the channel formed by the rear cover 15, the rear bottom shell 9, the pressing plate 7, and the front bottom shell 2 through the indoor air intake 17, then enters the air duct space formed by the front cover 1 and the front bottom shell 2, and then through the rotation of the first wind blade 5, the dirty air is transported through the channel formed by the front bottom shell 2, the pressing plate 7, and the rear bottom shell 9 to the space formed by the cover plate 10 and the rear cover 15, and finally the dirty air is discharged outdoors through the indoor air exhaust outlet 18.

[0063] The control method further includes: when the fresh air system is in the double air intake and double exhaust mode, control the first air deflector 3 to be in the second position, open the auxiliary exhaust port 34 and close the fifth air passage 25, control the second air deflector 12 to be in the second position to close the indoor air intake 17, connect the first flow channel and the second flow channel at the indoor air intake 17, control the air duct switching structure to be in the third position, connect the first flow channel and the second flow channel, connect the first outdoor communication port 19 with the first flow channel, and connect the second outdoor communication port 20 with the second flow channel. Outdoor air enters the rear bottom shell 9 through the first outdoor communication port 19 and the second outdoor communication port 20, and is divided into two parts at the air inlet of the second wind blade 8. One part enters the second wind blade 8 and is discharged into the room from the indoor air exhaust outlet 18 along the second flow channel, and the other part enters the first wind blade 5 along the first flow channel and is discharged into the room through the auxiliary exhaust port 34.

[0064] Combined with reference to Figures 11 to 14As shown, when the double-suction and double-exhaust air mode of the fresh air system is turned on, the double-shaft motor 6 starts, the first air blade 5 and the second air blade 8 are turned on, the first air deflector 3 rotates to the second position, the second air deflector 12 rotates to the second position, and the runner 14 rotates to the third position. The outdoor dirty air enters the space formed by the rear bottom shell 9, the cover plate 10 and the rear cover 15 through the first outdoor communication port 19 and the second outdoor communication port 20. A filter 13 is designed on the rear cover 15, and the dirty air is purified and filtered through the filter 13 to form clean air. A part of the clean air enters the air duct space formed by the rear bottom shell 9 and the pressing plate 7, and then the clean air is transported to the second flow channel formed by the rear bottom shell 9, the pressing plate 7, the front bottom shell 2 and the front cover 1 by the rotation of the second air blade 8, and then the clean air is discharged into the room through the indoor air discharge port 18; another part of the clean air enters the first flow channel formed by the rear cover 15, the rear bottom shell 9, the pressing plate 7 and the front bottom shell 2, then enters the air duct space formed by the front cover 1 and the front bottom shell 2, and then through the rotation of the first air blade 5, the clean air is discharged into the room through the auxiliary air discharge port 34.

[0065] It is easy for those skilled in the art to understand that, on the premise of no conflict, the above-mentioned advantageous ways can be freely combined and superimposed.

[0066] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. The above is only the preferred implementation manner of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present application, several improvements and modifications can still be made, and these improvements and modifications should also be regarded as the protection scope of the present application.

Claims

1. A fresh air system, characterized in that, It includes a rear cover (15), a rear bottom shell (9), a pressing plate (7), a front bottom shell (2) and a front cover (1) connected in sequence. A first flow channel and a second flow channel which are spaced apart from each other are formed between the rear cover (15), the rear bottom shell (9), the pressing plate (7), the front bottom shell (2) and the front cover (1). The fresh air system further includes an indoor air suction inlet (17) and an indoor air discharge outlet (18). The first flow channel is communicated with the indoor air suction inlet (17), and the second flow channel is communicated with the indoor air discharge outlet (18). A first outdoor communication port (19) and a second outdoor communication port (20) are arranged on the rear cover (15). A duct switching structure is arranged between the rear cover (15) and the rear bottom shell (9). When the duct switching structure is in the first position, the first outdoor communication port (19) and the second outdoor communication port (20) are closed, and the first flow channel and the second flow channel are communicated. When the duct switching structure is in the second position, the first flow channel and the second flow channel are separated, the first outdoor communication port (19) is communicated with the first flow channel, and the second outdoor communication port (20) is communicated with the second flow channel; A second air guide plate (12) is arranged at the indoor air suction inlet (17). When the second air guide plate (12) is in the first position, the indoor air suction inlet (17) is opened, and the first flow channel and the second flow channel are spaced apart at the indoor air suction inlet (17). When the second air guide plate (12) is in the second position, the indoor air suction inlet (17) is closed, and the first flow channel and the second flow channel are communicated at the indoor air suction inlet (17).

2. The fresh air system according to claim 1, characterized in that A first air blade (5) is arranged in the first flow channel, a second air blade (8) is arranged in the second flow channel, and the spaces where the first air blade (5) and the second air blade (8) are located are spaced apart.

3. The fresh air system according to claim 2, wherein The first air blade (5) is located in the space formed between the pressing plate (7) and the front bottom shell (2), the second air blade (8) is located in the space formed between the pressing plate (7) and the rear bottom shell (9), and the first air blade (5) and the second air blade (8) are separated by the pressing plate (7).

4. The fresh air system according to claim 2, wherein The first air blade (5) and the second air blade (8) are driven and connected by a double-shaft motor (6).

5. The fresh air system according to claim 1, wherein A cover plate (10) is provided between the rear cover (15) and the rear bottom shell (9). A first air passage (21) is provided on the cover plate (10), and the first air passage (21) forms part of the first flow passage. The cover plate (10) is further provided with a communication passage (26). The air duct switching structure includes a runner (14) and an adjusting plate (27). The runner (14) is rotatably provided on the rear cover (15), and the adjusting plate (27) is rotatable relative to the communication passage (26). The runner (14) is provided with a first communication hole (28) and a second communication hole (29). The first communication hole (28) and the second communication hole (29) are located on both sides of the adjusting plate (27). When the air duct switching structure is in the first position, the adjusting plate (27) opens the communication passage (26), and the runner (14) closes the first outdoor communication port (19) and the second outdoor communication port (20). When the air duct switching structure is in the second position, the adjusting plate (27) closes the communication passage (26), the first communication hole (28) of the runner (14) communicates with the first outdoor communication port (19), and the second communication hole (29) of the runner (14) communicates with the second outdoor communication port (20).

6. The fresh air system according to claim 5, wherein The adjusting plate (27) is fixedly connected to the runner (14). A third driving motor (16) is provided on the rear cover (15). The third driving motor (16) is fixedly connected to the runner (14) to drive the rotational position of the runner (14).

7. The fresh air system according to claim 1, wherein A filter (13) is provided between the first outdoor communication port (19) and the rear bottom shell (9). The filter (13) is located in the second flow passage and is provided on the side of the communication position between the first flow passage and the second flow passage close to the indoor air discharge port (18).

8. The fresh air system according to claim 2, wherein The front bottom shell (2) includes a first impeller installation space and a second air passage (22). The first impeller installation space and the second air passage (22) are separated by a partition. The first impeller installation space is located on the path of the first flow passage, and the second air passage (22) forms part of the second flow passage.

9. The fresh air system according to claim 2, wherein The pressing plate (7) is provided with a third air passage (23), a fourth air passage (24) and an avoidance opening (32). The third air passage (23), the fourth air passage (24) and the avoidance opening (32) are spaced apart. The third air passage (23) communicates with the air inlet of the first impeller (5) and the indoor air suction port (17). The fourth air passage (24) communicates with the air outlet of the first impeller (5). Both the third air passage (23) and the fourth air passage (24) form part of the first flow passage, and the avoidance opening (32) forms part of the second flow passage.

10. The fresh air system according to claim 9, characterized in that, The rear bottom case (9) includes a second wind blade installation space, the second wind blade (8) is disposed within the second wind blade installation space, and a fifth air passage (25) and an air outlet passage (33) are further provided on the rear bottom case (9). The fifth air passage (25) is isolated from the second wind blade installation space and the air outlet passage (33), the air outlet passage (33) is in communication with the second wind blade installation space, the fifth air passage (25) forms a part of the first flow passage, and the second wind blade installation space and the air outlet passage (33) form a part of the second flow passage.

11. The fresh air system according to claim 1, characterized in that, A second drive motor (11) is provided at the indoor air suction inlet (17), and the second drive motor (11) drives the second air deflector (12) to rotate.

12. The fresh air system according to claim 11, characterized in that, The air duct switching structure further includes a third position. When the air duct switching structure is in the third position, the first flow passage and the second flow passage are in communication, the first outdoor communication port (19) is in communication with the first flow passage, the second outdoor communication port (20) is in communication with the second flow passage, and the second air deflector (12) is in the second position.

13. The fresh air system according to claim 5, characterized in that, The air duct switching structure further includes a third position. A third communication hole (30) and a fourth communication hole (31) are further provided on the runner (14). When the air duct switching structure is in the third position, the regulating plate (27) opens the communication passage (26), the third communication hole (30) of the runner (14) is in communication with the first outdoor communication port (19), and the fourth communication hole (31) of the runner (14) is in communication with the second outdoor communication port (20).

14. The fresh air system according to claim 10, wherein, The air duct switching structure further includes a third position. An auxiliary air outlet (34) is provided at the top of the front bottom case (2). A first air deflector (3) and a first drive motor (4) are provided at the auxiliary air outlet (34). The first drive motor (4) is drivingly connected to the first air deflector (3) to drive the first air deflector (3) to swing. When the air duct switching structure is in the first position and the second position, the first air deflector (3) is in the first position, closing the auxiliary air outlet (34) and opening the fifth air passage (25). When the air duct switching structure is in the third position, the first air deflector (3) is in the second position, opening the auxiliary air outlet (34) and closing the fifth air passage (25).

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

16. A control method for a fresh air system according to any one of claims 1 to 14, characterized in that, Including: Obtaining the working mode of the fresh air system; When the fresh air system is in the internal circulation mode, controlling the air duct switching structure to be in the first position, closing the first outdoor communication port (19) and the second outdoor communication port (20), connecting the first flow passage and the second flow passage, allowing indoor air to reach the air duct switching structure from the indoor air suction inlet (17) through the first flow passage, enter the second flow passage, and then be discharged from the indoor air discharge outlet (18) along the second flow passage; When the fresh air system is in the air intake and exhaust mode, control the air duct switching structure to be in the second position, separate the first flow channel and the second flow channel, connect the first outdoor communication port (19) with the first flow channel, connect the second outdoor communication port (20) with the second flow channel, discharge the outdoor air from the indoor air exhaust outlet (18) through the second outdoor communication port (20) and the second flow channel, and discharge the indoor air from the first outdoor communication port (19) through the first flow channel to the outside.

17. The control method of the fresh air system according to claim 16, wherein, The control method further includes: When the fresh air system is in the double air intake and double exhaust mode, control the first air deflector (3) to be in the second position, open the auxiliary exhaust port (34) and close the fifth air passage (25), control the second air deflector (12) to be in the second position to close the indoor air intake port (17), connect the first flow channel and the second flow channel at the indoor air intake port (17), control the air duct switching structure to be in the third position, connect the first flow channel and the second flow channel, connect the first outdoor communication port (19) with the first flow channel, connect the second outdoor communication port (20) with the second flow channel, allow the outdoor air to enter the rear bottom case (9) through the first outdoor communication port (19) and the second outdoor communication port (20), and divide into two parts at the air inlet of the second air blade (8). One part enters the second air blade (8) and then is discharged into the room from the indoor air exhaust outlet (18) along the second flow channel, and the other part enters the first air blade (5) along the first flow channel and is then discharged into the room through the auxiliary exhaust port (34).

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