Fresh air device, duct type air conditioner and control method

Abstract

The invention provides a fresh air device, a duct type air conditioner and a control method. In the fresh air device, an air inlet of a first-section air outlet channel communicates with an air outlet of a draught fan of the fresh air device, and a first fresh air outlet is formed in the first-section air outlet channel and used for discharging air to a to-be-adjusted space adjusted by the duct type air conditioner. A first wind shield is arranged at the position of the first fresh air outlet, and the first wind shield can control the first fresh air outlet to be opened or closed. The second-section air outlet channel is connected with the first-section air outlet channel, the second-section air outlet channel and the first-section air outlet channel are controlled to be connected or disconnected through a second air baffle, and a second fresh air outlet is formed in the second-section air outlet channel and used for conveying exhausted air to an inner unit of the duct type air conditioner. Different air outlet modes can be adopted according to different conditions, the problem that the sensible temperature is abnormal due to the fact that the temperature difference between the interior and the exterior of the space to be adjusted is too large can be effectively avoided, and fresh air can be directly introduced under the condition that the temperature difference between the interior and the exterior of the space to be adjusted is not large.

Description

Technical Field

[0001] This disclosure relates to the field of duct air conditioning technology, and in particular to a fresh air device, duct air conditioning unit and control method. Background Technology

[0002] Currently, health features are increasingly valued by consumers, and the development of ducted air conditioners needs to incorporate health considerations. Traditional ducted air conditioners primarily focus on comfort, regulating indoor temperature and humidity to meet user needs. However, a major problem is that prolonged use doesn't provide a good user experience. During daily use, windows and other windows are usually closed when the air conditioner is on, resulting in poor air circulation and a stuffy feeling. Therefore, integrating a fresh air system into traditional ducted air conditioners is essential. However, in ducted air conditioners with integrated fresh air systems, the introduction of fresh air into the room leads to a significant temperature difference between indoors and outdoors, severely impacting the user experience. Summary of the Invention

[0003] In view of this, in order to solve the technical problem that the introduction of fresh air into the room in the existing duct air conditioner with fresh air device results in a large temperature difference between indoors and outdoors, this disclosure provides a fresh air device, a duct air conditioner and a control method.

[0004] According to a first aspect of the present disclosure, a fresh air device is provided, the fresh air device being applied to a ducted air conditioner, the fresh air device including a first air outlet channel and a second air outlet channel, wherein a first air inlet of the first air outlet channel is connected to the air outlet of the fan of the fresh air device. The first section of the air outlet duct is provided with a first fresh air outlet, which is used to discharge gas from the space to be adjusted by the air duct machine. A first baffle is provided at the position of the first fresh air outlet, which is used to control the opening or closing of the first fresh air outlet. The second air outlet channel is connected to the first air outlet channel, and a second baffle is provided at the connection position between the second air outlet channel and the first air outlet channel to control the connection or closure between the first air outlet channel and the second air outlet channel; The second section of the air outlet duct is provided with a second fresh air outlet, which is used to transmit the discharged gas to the indoor unit of the air duct machine, so that the gas is discharged to the space to be regulated after passing through the indoor unit.

[0005] In one alternative implementation, The second fresh air outlet and the indoor unit's air intake are located on the same side of the ducted air conditioner, so that the indoor unit can draw the gas discharged from the second fresh air outlet into the indoor unit through the indoor unit's air intake.

[0006] In one alternative implementation, The second fresh air outlet is connected to the indoor unit's air intake, so that the gas discharged from the second fresh air outlet enters the indoor unit through the indoor unit's air intake.

[0007] In one alternative implementation, The fresh air device has a first air outlet mode and a second air outlet mode; In the first air outlet mode, the first baffle plate closes the first fresh air outlet, and the second baffle plate controls the connection between the first air outlet channel and the second air outlet channel. In the second air outlet mode, the first baffle opens the first fresh air outlet, and the second baffle controls the closure between the first section of the air outlet channel and the second section of the air outlet channel.

[0008] In one alternative implementation, In the first air outlet mode, the first baffle plate rotates into the first air outlet channel, and the free end of the first baffle plate abuts against the side of the first air outlet channel opposite to the second air outlet channel, and the included angle between the first baffle plate and the axis of the second air outlet channel is greater than or equal to 30° and less than or equal to 70°.

[0009] In one alternative implementation, In the first air outlet mode, the second baffle plate of the fresh air device rotates into the second section of the air outlet channel, and the free end of the second baffle plate abuts against the side of the second section of the air outlet channel opposite to the first baffle plate.

[0010] In one alternative implementation, In the second air outlet mode, the first baffle plate of the fresh air device rotates to the outside of the first air outlet channel, and the included angle between the first baffle plate and the axial direction of the first air outlet channel is greater than 0° and less than or equal to 90°.

[0011] In one alternative implementation, The first wind deflector and / or the second wind deflector are constructed as straight plates.

[0012] In one alternative implementation, The fresh air device includes a filter screen, the filter screen having a curved filter surface, and the convex side of the filter surface facing the air intake side of the filter screen.

[0013] In one alternative implementation, The fresh air device includes an arc-shaped track, and the filter screen is placed on opposite sides within the arc-shaped track. The filter screen moves in a pull-out motion by moving along the arc-shaped track.

[0014] In one alternative implementation, One end of the filter screen is provided with a snap-fit ​​plate, the snap-fit ​​plate is provided with at least one snap-fit ​​hole, and the housing of the fresh air device is provided with a snap-fit ​​structure that cooperates with the snap-fit ​​hole; When the filter screen is in the installed state, the snap-fit ​​structure snaps into the snap-fit ​​hole.

[0015] In one alternative implementation, One end of the filter screen is provided with a handle structure, which is located on the side of the snap-fit ​​plate opposite to the housing.

[0016] According to a second aspect of the present disclosure, a ducted air conditioner is provided, the ducted air conditioner including an indoor unit and a fresh air device as described in any of the first aspects, the fresh air device being located on one side of the indoor unit.

[0017] According to a third aspect of the present disclosure, a control method is provided, the control method being applied to a ducted air conditioner as described in the second aspect, wherein the fresh air device of the ducted air conditioner has a first air outlet mode and a second air outlet mode; In the first air outlet mode, the first baffle plate closes the first fresh air outlet, and the second baffle plate controls the connection between the first air outlet channel and the second air outlet channel. In the second air outlet mode, the first baffle opens the first fresh air outlet, and the second baffle controls the closure between the first section of the air outlet channel and the second section of the air outlet channel. The control method includes: Based on the temperature difference between the inside and outside of the space to be adjusted by the duct air conditioner, the operating mode of the fresh air device of the duct air conditioner is adjusted; wherein, the operating mode includes the first air outlet mode and the second air outlet mode.

[0018] In one alternative implementation, The method of adjusting the operating mode of the fresh air device of the ducted air conditioner based on the temperature difference between the inside and outside of the space to be adjusted by the ducted air conditioner includes: If it is determined that the internal and external temperature difference is greater than the set temperature difference threshold, then the fresh air device is controlled to be in the first air outlet mode.

[0019] In one alternative implementation, The method of adjusting the operating mode of the fresh air device of the ducted air conditioner based on the temperature difference between the inside and outside of the space to be adjusted by the ducted air conditioner includes: If it is determined that the internal and external temperature difference is less than or equal to the set temperature difference threshold, then the fresh air device is controlled to be in the second air outlet mode.

[0020] In one alternative implementation, The control method includes: When the fresh air device is in the second air outlet mode, if the indoor unit is in the heating mode, the angle between the first baffle and the horizontal direction is controlled to be greater than 0° and less than or equal to 45°.

[0021] In one alternative implementation, The control method includes: When the fresh air device is in the second air outlet mode, if the indoor unit is in the cooling mode, the angle between the first baffle and the horizontal direction is controlled to be greater than 45° and less than or equal to 90°.

[0022] The technical solutions provided by the embodiments of this disclosure can include the following beneficial effects: In this disclosure, the fresh air device in the ducted air conditioner may include a first air outlet channel and a second air outlet channel. The air inlet of the first air outlet channel (denoted as the first air inlet) is connected to the air outlet of the fan of the fresh air device, that is, the gas discharged by the fan first enters the first air outlet channel. A first fresh air outlet is provided on the first air outlet channel for discharging the gas to the space to be regulated (e.g., indoor space) regulated by the ducted air conditioner. A first baffle is provided at the position of the first fresh air outlet, which can control the opening or closing of the first fresh air outlet, thereby controlling whether the fresh air device can directly discharge fresh air to the space to be regulated. The second air outlet channel is connected to the first air outlet channel, and the two are connected or closed by a second baffle. A second fresh air outlet is provided on the second air outlet channel for transmitting the discharged gas to the indoor unit of the ducted air conditioner, so that the gas is discharged to the space to be regulated after passing through the indoor unit. That is, the second baffle can control whether the fresh air discharged by the fresh air device passes through the indoor unit before being discharged to the space to be regulated. Based on this, the fresh air device and the ducted air conditioner equipped with the fresh air device disclosed herein can have two air outlet methods. One air outlet method directly discharges fresh air from the first fresh air outlet to the space to be regulated, in which case fresh air can be directly introduced to quickly reduce the carbon dioxide concentration in the space to be regulated. The other air outlet method transmits fresh air to the indoor unit and then discharges it to the space to be regulated, which has less impact on the indoor temperature. That is, the present disclosure adopts different air outlet methods according to different situations, which can effectively avoid the problem of abnormal perceived temperature caused by excessive temperature difference between the inside and outside of the space to be regulated. At the same time, when the temperature difference between the inside and outside of the space to be regulated is not large, fresh air can be directly introduced to quickly reduce the carbon dioxide concentration in the space to be regulated, which can greatly improve the user experience.

[0023] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] One or more embodiments are illustrated by way of example with reference numerals in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings are denoted as similar elements. Unless otherwise stated, the figures in the drawings are not to be limited by scale.

[0027] Figure 1 This is a schematic diagram of a fresh air system according to an exemplary embodiment.

[0028] Figure 2 This is a schematic diagram of a ducted air handling unit according to an exemplary embodiment.

[0029] Figure 3 This is another schematic diagram of a ducted air handling unit according to an exemplary embodiment.

[0030] Figure 4 This is another schematic diagram of a fresh air device according to an exemplary embodiment.

[0031] Figure 5 This is a schematic diagram illustrating a fresh air device in a first air outlet mode according to an exemplary embodiment.

[0032] Figure 6 This is a schematic diagram illustrating a fresh air device in a second air outlet mode according to an exemplary embodiment.

[0033] Figure 7 This is a partial schematic diagram of a ducted air handling unit according to an exemplary embodiment.

[0034] Figure 8 This is another schematic diagram of a fresh air device according to an exemplary embodiment.

[0035] Figure 9 This is a partial schematic diagram of a fresh air system according to an exemplary embodiment.

[0036] Figure 10 This is a schematic diagram illustrating a control method according to an exemplary embodiment.

[0037] in: 1. Fresh air unit; 11. Fan; 12. First air outlet duct; 13. Second air outlet duct; 14. First baffle plate; 15. Second baffle plate; 16. Filter screen; 161. Clip plate; 162. Clip hole; 163. Clip structure; 164. Handle structure; 17. Arc track; 2. Indoor unit; 10. First fresh air outlet; 20. Second fresh air outlet; 30. Indoor unit air intake; 40. Indoor unit air outlet; 50. Fresh air intake. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] The following disclosure provides numerous different embodiments or examples for implementing various aspects of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the scope of the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed.

[0040] For ease of description, spatial relative terms may be used in the text to describe the relative position or movement of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "front," "back," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure undergoes a positional flip, orientation change, or change of motion, these directional indications will change accordingly. For instance, an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0041] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. Therefore, the drawings only show the components related to this application and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0042] The embodiments of this application will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be understood that the preferred embodiments are only for illustrating this application and are not intended to limit the scope of protection of this application.

[0043] To address the technical problem of a large temperature difference between indoors and outdoors caused by the introduction of fresh air into ducted air conditioning units equipped with fresh air devices in the prior art, this disclosure provides a fresh air device, a ducted air conditioning unit, and a control method.

[0044] In this disclosure, the fresh air unit in the ducted air conditioning system may include a first air outlet duct and a second air outlet duct. The air inlet of the first air outlet duct (denoted as the first air inlet) is connected to the air outlet of the fan of the fresh air unit, meaning that the air discharged by the fan first enters the first air outlet duct. A first fresh air outlet is provided on the first air outlet duct for discharging the air to the space to be regulated (e.g., indoor space) by the ducted air conditioning system. A first baffle is provided at the location of the first fresh air outlet, which can control the opening or closing of the first fresh air outlet, thereby controlling whether the fresh air unit can directly discharge fresh air to the space to be regulated. The second air outlet duct is connected to the first air outlet duct, and the connection between the two is controlled by a second baffle. A second fresh air outlet is provided on the second air outlet duct for transmitting the discharged air to the indoor unit of the ducted air conditioning system, so that the air passes through the indoor unit before being discharged to the space to be regulated. That is, the second baffle can control whether the fresh air discharged by the fresh air unit passes through the indoor unit before being discharged to the space to be regulated. Based on this, the fresh air device and the ducted air conditioner equipped with the fresh air device disclosed herein can have two air outlet methods. One air outlet method directly discharges fresh air from the first fresh air outlet to the space to be regulated, in which case fresh air can be directly introduced to quickly reduce the carbon dioxide concentration in the space to be regulated. The other air outlet method transmits fresh air to the indoor unit and then discharges it to the space to be regulated, which has less impact on the indoor temperature. That is, the present disclosure adopts different air outlet methods according to different situations, which can effectively avoid the problem of abnormal perceived temperature caused by excessive temperature difference between the inside and outside of the space to be regulated. At the same time, when the temperature difference between the inside and outside of the space to be regulated is not large, fresh air can be directly introduced to quickly reduce the carbon dioxide concentration in the space to be regulated, which can greatly improve the user experience.

[0045] In one exemplary embodiment, reference Figures 1 to 4 as well as Figure 10 As shown, a fresh air device 1 is provided, as well as a ducted air conditioner equipped with the fresh air device 1, and a control method for the ducted air conditioner. That is, the fresh air device 1 can be applied to a ducted air conditioner.

[0046] The fresh air device 1 may include a first air outlet duct 12, the first air inlet of the first air outlet duct 12 being connected to the air outlet of the fan 11 of the fresh air device 1. After the fan 11 draws in fresh air from outside the space to be adjusted by the duct machine, it can transmit the fresh air to the first air outlet duct 12 through the air outlet.

[0047] Among them, the fan 11 is the core power component of the fresh air device 1. The fan 11 is installed in a suitable position of the air duct machine, and its air inlet is connected to the outside of the space to be adjusted (such as indoors) by the air duct machine, so as to draw in fresh air from outside the space to be adjusted.

[0048] The first section of the air outlet duct 12 is equipped with a first fresh air outlet 10, which is used to discharge gas into the space to be regulated (e.g., indoor space) by the duct air conditioner. A first baffle 14 is provided at the position of the first fresh air outlet 10, which is used to control whether the first fresh air outlet 10 is open or closed. That is, the first baffle 14 can control whether the fresh air drawn in by the fan 11 of the fresh air device 1 is directly discharged into the space to be regulated.

[0049] It should be noted that when the first fresh air outlet 10 is turned on (i.e., the first fresh air outlet 10 is in the open state), the fresh air drawn in by the fresh air device 1 can be directly discharged to the space to be regulated. In other words, fresh air can be directly introduced into the space to be regulated, which can quickly reduce the carbon dioxide concentration in the space to be regulated.

[0050] The fresh air device 1 may include a second air outlet duct 13, which is connected to the first air outlet duct 12. A second baffle 15 is provided at the connection point between the second air outlet duct 13 and the first air outlet duct 12 to control whether the first air outlet duct 12 and the second air outlet duct 13 are connected or disconnected. That is, the second baffle 15 can control whether the fresh air drawn in by the fan 11 of the fresh air device 1 is transmitted to the second air outlet duct 13.

[0051] The second air outlet 13 is equipped with a second fresh air outlet 20, which is used to transmit the discharged gas to the indoor unit 2 of the ducted air conditioner, so that the gas is discharged to the space to be regulated after passing through the indoor unit 2. Since the second baffle 15 can control the connection or closure (i.e., cut-off) between the first air outlet 12 and the second air outlet 13, and the second fresh air outlet 20 on the second air outlet 13 can transmit the discharged gas to the indoor unit 2, the second baffle 15 can control whether the fresh air drawn in by the fresh air device 1 enters the indoor unit 2 before being discharged to the space to be regulated.

[0052] In addition to the aforementioned fresh air unit 1 and indoor unit 2, the ducted air conditioning unit may also include an outdoor unit (not shown in the figure) and other necessary components for achieving air conditioning functions, which are not limited. The fresh air unit 1 and the indoor unit 2 of the ducted air conditioning unit are connected for gas transmission through the second fresh air outlet 20, and the indoor unit 2 discharges the treated air to the space to be conditioned through its air outlet (second air outlet).

[0053] It should be noted that when the first air outlet duct 12 and the second air outlet duct 13 are connected, the fresh air drawn in by the fresh air device 1 can be discharged through the second fresh air outlet 20, and then enter the indoor unit 2 of the duct air conditioner. Then it can be discharged to the space to be regulated through the air outlet of the indoor unit 2 (which can be referred to as the second air outlet), thereby reducing the impact on the temperature of the space to be regulated.

[0054] The fresh air device 1 has a first air outlet mode and a second air outlet mode. In the first air outlet mode, the first baffle 14 closes the first fresh air outlet 10, and the second baffle 15 controls the connection between the first section of the air outlet channel 12 and the second section of the air outlet channel 13. At this time, the fresh air drawn in by the fresh air device 1 can be discharged through the second fresh air outlet 20, then enter the indoor unit 2 of the ducted air conditioner, and then be discharged to the space to be regulated through the air outlet of the indoor unit 2, thereby reducing the impact on the temperature of the space to be regulated. In the second air outlet mode, the first baffle 14 opens the first fresh air outlet 10, and the second baffle 15 controls the connection between the first section of the air outlet channel 12 and the second section of the air outlet channel 13. At this time, the fresh air drawn in by the fresh air device 1 can be directly discharged to the space to be regulated, that is, fresh air can be directly introduced into the space to be regulated, which can quickly reduce the carbon dioxide concentration in the space to be regulated.

[0055] In the control method of this embodiment, the operating mode of the fresh air device 1 of the duct air machine can be adjusted based on the temperature difference between the inside and outside of the space to be adjusted by the duct air machine; wherein the operating mode includes the first air outlet mode and the second air outlet mode.

[0056] For example, if the internal and external temperature difference is determined to be greater than the set temperature difference threshold, it indicates that the internal and external temperature difference is large. In order to avoid the discomfort caused to the user by directly introducing fresh air into the space to be regulated when the internal and external temperature difference is large, the fresh air device 1 can be controlled to be in the first air outlet mode. The fresh air drawn in by the fresh air device 1 can be discharged through the second fresh air outlet 20, and then enter the indoor unit 2 of the duct air conditioner, and then be discharged to the space to be regulated through the air outlet of the indoor unit 2, thereby reducing the impact on the temperature of the space to be regulated.

[0057] For example, if the temperature difference between the inside and outside is determined to be less than or equal to the set temperature difference threshold, it means that the temperature difference between the inside and outside is small. Even if fresh air from outside the space to be regulated is directly introduced into the space to be regulated, it will not cause discomfort to the user. Therefore, the fresh air device 1 can be controlled to be in the second air outlet mode. At this time, fresh air can be directly introduced into the space to be regulated, which can quickly reduce the carbon dioxide concentration in the space to be regulated and improve the user's comfort.

[0058] It should be noted that the temperature difference threshold can be set according to actual needs, and its specific value is not limited. For example, the temperature difference threshold can be greater than or equal to 5℃ and less than or equal to 10℃.

[0059] The fresh air device 1 in this embodiment has a relatively simple structure, adding only necessary channels and baffles to the traditional ducted air conditioner, without requiring large-scale modifications to the existing ducted air conditioner structure. Furthermore, the fresh air device 1 and the ducted air conditioner equipped with it can have two air outlet methods: one directly discharges fresh air from the first fresh air outlet 10 to the space to be regulated, allowing for direct fresh air intake and rapid reduction of carbon dioxide concentration in the space; the other method transmits fresh air to the indoor unit 2 before discharging it to the space, minimizing impact on indoor temperature. In other words, this embodiment can employ different air outlet methods depending on the situation, exhibiting strong adaptability and flexibility. This implementation effectively avoids the problem of abnormal perceived temperature caused by excessive temperature differences between the inside and outside of the space to be regulated. Simultaneously, when the temperature difference is small, fresh air can be directly introduced to rapidly reduce carbon dioxide concentration in the space, significantly improving the user experience. The fresh air device 1, the duct air conditioner and its control method in this embodiment effectively solve the problems existing in the traditional duct air conditioner after integrating the fresh air device 1 through innovative design and reasonable control strategy. It has significant advantages in improving user experience and improving the air quality of the space to be regulated.

[0060] In one exemplary embodiment, reference Figures 1 to 7 as well as Figure 10 As shown, a fresh air device 1, a ducted air conditioner equipped with the fresh air device 1, and a control method for the ducted air conditioner are provided. In this embodiment, the second fresh air outlet 20 and the indoor unit air intake 30 of the indoor unit 2 are located on the same side of the ducted air conditioner, so that the indoor unit 2 draws in the air discharged from the second fresh air outlet 20 through the indoor unit air intake 30. Since the second fresh air outlet 20 and the indoor unit air intake 30 of the indoor unit 2 are located on the same side of the ducted air conditioner, the fresh air discharged from the second fresh air outlet 20 can be quickly drawn in by the indoor unit air intake 30 of the indoor unit 2 and enter the indoor unit 2 to participate in the heat exchange process. The indoor unit 2 then discharges the treated air to the space to be conditioned through its indoor unit air outlet 40.

[0061] For example, the fresh air device 1 can be installed on one side (e.g., the left side) of the indoor unit 2. When the fresh air device 1 and the indoor unit 2 are assembled, the second fresh air outlet 20 of the fresh air device 1 and the indoor unit air intake 30 of the indoor unit 2 are located on the same side (e.g., the rear side). With this arrangement, after the fresh air is discharged from the second fresh air outlet, it can be drawn into the indoor unit 2 through the indoor unit air intake 30 under the suction of the indoor unit 2. Then, it participates in the circulation within the indoor unit 2 and is discharged to the space to be adjusted through the indoor unit air outlet 40.

[0062] The second fresh air outlet 20 is positioned facing the indoor unit's air intake 30, allowing the indoor unit 2 to draw in the air discharged from the second fresh air outlet 20 through the indoor unit's air intake 30. Because the second fresh air outlet 20 faces the indoor unit's air intake 30, the fresh air discharged from the second fresh air outlet 20 is quickly drawn into the indoor unit 2 through the indoor unit's air intake 30 and enters the indoor unit 2 to participate in the heat exchange process. The indoor unit 2 then discharges the treated air to the space to be conditioned through its indoor unit air outlet 40.

[0063] For example, the fresh air device 1 can be installed on one side (e.g., the left side) of the indoor unit 2. When the fresh air device 1 and the indoor unit 2 are assembled, the second fresh air outlet 20 of the fresh air device 1 and the indoor unit air intake 30 of the indoor unit 2 are located on the same side (e.g., the rear side), and the second fresh air outlet 20 can face the right side. With this arrangement, the second fresh air outlet can directly discharge fresh air in the direction of the indoor unit air intake 30 of the indoor unit 2. Then, under the suction of the indoor unit 2, the fresh air can be drawn into the indoor unit 2 through the indoor unit air intake 30, participate in the circulation within the indoor unit 2, and then be discharged to the space to be adjusted through the indoor unit air outlet 40.

[0064] In this embodiment, the second fresh air outlet 20 and the indoor unit 2's air intake 30 are located on the same side of the ducted air conditioner, greatly shortening the path of fresh air from exhaust to intake into the indoor unit 2. After exhaust, the fresh air is quickly drawn into the indoor unit 2 to participate in heat exchange, enhancing the synergy between the fresh air unit 1 and the indoor unit 2, making the entire air conditioning system's regulation of fresh air and indoor air more precise and efficient. Furthermore, when the fresh air unit 1 is in the first air outlet mode, because the fresh air can quickly enter the indoor unit 2, it mixes thoroughly with the indoor circulating air and undergoes heat exchange, better regulating the temperature and humidity of the fresh air to better meet the needs of the space being regulated. The fully treated fresh air is then discharged through the indoor unit's air outlet 40, effectively improving indoor air quality and providing users with a healthier and more comfortable air environment. Moreover, designing the second fresh air outlet 20 and the indoor unit 2's air intake 30 on the same side, while meeting functional requirements, optimizes the internal space layout of the ducted air conditioner, making the structure more compact and reasonable. This helps reduce the overall size of the ducted air conditioner, facilitating installation and maintenance, and is especially suitable for spaces with limited space.

[0065] In one exemplary embodiment, reference Figures 1 to 7 As shown, a fresh air device 1 is provided, as well as a ducted air conditioner equipped with the fresh air device 1, and a control method for the ducted air conditioner. In this embodiment, a second fresh air outlet 20 is connected to the indoor unit air intake 30 of the indoor unit 2 (not shown in the figure), so that the gas discharged from the second fresh air outlet 20 enters the indoor unit 2 through the indoor unit air intake 30.

[0066] The indoor unit 2 may include two indoor unit air intakes 30. One indoor unit air intake 30 is connected to the second fresh air outlet 20 through a pipeline to treat fresh air. The other indoor unit air intake 30 is exposed in the space to be regulated and is used to absorb the gas in the space to be regulated and to directly treat the gas in the space to be regulated.

[0067] In this embodiment, when the fresh air device 1 is in the first air outlet mode, the fresh air discharged from the second fresh air outlet can directly enter the indoor unit 2, then participate in the circulation within the indoor unit 2, and then be discharged to the space to be regulated through the air outlet of the indoor unit 2. This enhances the synergy between the fresh air device 1 and the indoor unit 2, and can better regulate the temperature and humidity of the fresh air. This makes the entire air conditioning system more precise and efficient in regulating the fresh air and indoor air, making it more in line with the needs of the space to be regulated, and providing users with a healthier and more comfortable air environment.

[0068] In one exemplary embodiment, reference Figures 1 to 7 as well as Figure 10 As shown, a fresh air device 1, a ducted air conditioner equipped with the fresh air device 1, and a control method for the ducted air conditioner are provided. In this embodiment, in the first air outlet mode, the fresh air device 1 has a first baffle plate 14 rotating into the first air outlet channel 12, and the free end of the first baffle plate 14 abutting against the side of the first air outlet channel 12 opposite to the second air outlet channel 13, and the included angle α between the first baffle plate 14 and the second air outlet channel 13 is greater than or equal to 30° and less than or equal to 70°.

[0069] The first air outlet duct 12 can have its axis in a first direction, and the second air outlet duct 13 can have its axis in a second direction. The first and second directions can be perpendicular. For example, when the ducted air conditioner is in use, the first direction can be vertical, and the second direction can be horizontal. Of course, the specific directions of the first and second directions can be set according to actual needs, and there are no limitations on this.

[0070] The first air outlet duct 12 has a notch on its side wall, and the second air outlet duct 13 is connected to the side wall of the first air outlet duct 12. A second baffle plate 15 is provided at the connection position. The second baffle plate 15 is used to control the opening or closing of the notch, thereby controlling the connection or closure between the first air outlet duct 12 and the second air outlet duct 13.

[0071] The first baffle plate 14 can be located at the first fresh air outlet 10 of the first air outlet duct 12, and the first baffle plate 14 is rotatably connected to the side wall of the second air outlet duct 13 at the above-mentioned connection position. The first baffle plate 14 controls the first fresh air outlet 10 to be opened or closed by rotating.

[0072] When the fresh air device 1 is in the first air outlet mode, the first baffle plate 14 can rotate into the first air outlet duct 12, and the free end of the first baffle plate 14 can abut against the side wall of the first air outlet duct 12, which is the side wall of the first air outlet duct 12 facing away from the first air outlet duct 12. In this way, the first baffle plate 14 can not only close the first fresh air outlet 10, but also connect the first air outlet duct 12 and the second air outlet duct 13 at this time. The airflow of the first air outlet duct 12 is redirected to the second air outlet duct 13 by the obstruction of the first baffle plate 14.

[0073] The included angle b between the first baffle plate 14 and the second air outlet channel 13 along their axes can be greater than or equal to 30° and less than or equal to 70° to better guide the airflow. It should be noted that if the angle is too small, it may not effectively guide the airflow, resulting in a large airflow impact; if the angle is too large, it may excessively occupy the airflow transmission space of the first air outlet channel 12, leading to insufficient transmission space and affecting airflow transmission.

[0074] In the first air outlet mode, the second baffle plate 15 of the fresh air device 1 can be rotated into the second air outlet channel 13, and the free end of the second baffle plate 15 abuts against the side of the second air outlet channel 13 away from the first baffle plate 14, thereby completely opening the gap on the first air outlet channel 12, and ensuring that the connection position between the first air outlet channel 12 and the second air outlet channel 13 has a sufficiently large airflow transmission space, so as to better guide the airflow to the second air outlet channel 13.

[0075] In the second air outlet mode, the first baffle plate 14 of the fresh air device 1 rotates to the outside of the first air outlet channel 12 to open the first fresh air outlet 10, so that fresh air is directly discharged to the space to be adjusted through the first fresh air outlet 10.

[0076] In the second air outlet mode, the angle between the first baffle plate 14 and the first air outlet channel 12 can be greater than 0° and less than or equal to 90°, and the angle is adjustable. For example, the angle can be adjusted according to different internal and external temperature differences to better meet the different needs of users.

[0077] The first baffle plate 14 can be constructed as a straight plate, an arc shape, or any other structure, as long as it can enable the opening and closing of the first fresh air outlet 10. The second baffle plate 15 can be constructed as a straight plate, an arc shape, or any other structure, as long as it can enable the connection and closure between the first air outlet channel 12 and the second air outlet channel 13.

[0078] It should be noted that when the second wind deflector 15 is an arc-shaped structure, it is easy to cause vortex areas. Therefore, the second wind deflector 15 is preferably a straight plate structure to avoid the formation of vortex areas.

[0079] In this embodiment, the first baffle 14 and the second baffle 15 enable flexible switching between the first and second air outlet modes. In the first air outlet mode, fresh air is discharged after being processed by the indoor unit 2, avoiding excessive temperature differences between indoors and outdoors that could affect comfort. In the second air outlet mode, fresh air is discharged directly, quickly improving indoor air quality and meeting the needs of different scenarios. Moreover, the first baffle 14 and the second air outlet channel 13 are at a suitable axial angle, which effectively guides the airflow in the first air outlet mode, preventing excessive airflow impact while not occupying too much transmission space, ensuring smooth airflow to the second air outlet channel 13. In the first air outlet mode, the second baffle 15 rotates to a suitable position, fully opening the notch to ensure sufficient airflow transmission space at the connection point between the first and second air outlet channels 13, thereby improving airflow transmission efficiency. In addition, in this embodiment, in the second air outlet mode, the axial angle between the first baffle plate 14 and the first air outlet channel 12 is adjustable. The angle can be adjusted according to different internal and external temperature differences to better meet the different requirements of users for indoor air quality and comfort, and to better improve the user experience.

[0080] In addition, in this embodiment, when the fresh air device 1 is in the second air outlet mode, if the indoor unit 2 is in the heating mode, the angle between the first baffle plate 14 and the horizontal direction can be controlled to be greater than 0° and less than or equal to 45°. That is, when the axis of the first air outlet channel 12 is vertical and the axis of the second air outlet channel 13 is horizontal, when the fresh air device 1 is in the second air outlet mode, if the indoor unit 2 is in the heating mode, the angle between the first baffle plate 14 and the axis of the second air outlet channel 13 can be controlled to be greater than 0° and less than or equal to 45°.

[0081] It should be noted that when the fresh air device 1 is in the second air outlet mode, the fresh air can be directly blown into the space to be adjusted. Since the indoor unit 2 of the ducted air conditioner is in the heating mode, the hot air will rise after being sent down. Therefore, the angle between the first baffle plate 14 and the horizontal direction is set to be greater than 0° and less than or equal to 45°, so that the fresh air discharged by the fresh air device 1 is sent down a relatively short distance, and the temperature is neutralized faster after mixing with the upper air, thus improving the user experience.

[0082] When the fresh air system 1 is in the second air outlet mode, if the indoor unit 2 is in the cooling mode, the angle between the first baffle plate 14 and the horizontal direction is greater than 45° and less than or equal to 90°. That is, when the axis of the first air outlet duct 12 is vertical and the axis of the second air outlet duct 13 is horizontal, when the fresh air system 1 is in the second air outlet mode, if the indoor unit 2 is in the cooling mode, the angle between the first baffle plate 14 and the axis of the second air outlet duct 13 can be controlled to be greater than 45° and less than or equal to 90°.

[0083] It should be noted that when the fresh air device 1 is in the second air outlet mode, the fresh air can be directly blown into the space to be regulated. Since the indoor unit 2 of the ducted air conditioner is in the cooling mode, the cold air is mostly in the lower layer of the space to be regulated after being sent down. Therefore, the angle between the first baffle plate 14 and the horizontal direction is set to be greater than 45° and less than or equal to 90°, so that the fresh air discharged by the fresh air device 1 is sent down a longer distance and the temperature is neutralized faster after mixing with the lower layer of air, thus improving the user experience.

[0084] In this embodiment, by adjusting the angle to suit the operating conditions, the first baffle 14 can guide the fresh air to form a more reasonable airflow trajectory: under heating conditions, the fresh air delivered over a short distance can quickly integrate with the rising hot airflow, avoiding the feeling of coolness caused by the fresh air blowing directly onto the human body; under cooling conditions, the fresh air delivered over a long distance can effectively cover the lower level of the indoor space, fully mixing with the sinking cold air, reducing the phenomenon of temperature stratification between the upper and lower levels of the room. This design significantly optimizes the uniformity of the indoor temperature field, making the fresh air introduction process more in line with the dynamic changes of the indoor thermal environment, further improving the user experience. Moreover, this angle adjustment function is based on the existing rotatable structure of the first baffle 14 in the second air outlet mode, without the need to add an additional independent drive module or adjustment mechanism. The adaptation of the operating conditions and angle can be completed simply by optimizing the control logic. Without increasing the complexity of the device and production costs, the precise optimization of the fresh air outlet effect is achieved, taking into account both technological improvement and the economics of industrial application.

[0085] In one exemplary embodiment, reference Figures 1 to 9 As shown, a fresh air device 1 is provided, along with a ducted air conditioner equipped with the fresh air device 1, and a control method for the ducted air conditioner. In this embodiment, the fresh air device 1 may include a filter 16, the filter surface of which is curved, and the convex side of the filter surface faces the air intake side of the filter 16 (i.e., the side where the fan 11 draws in fresh air). Compared to a planar filter 16, the airflow after passing through the curved filter 16 in this embodiment has a certain upward (here referring to...) Figure 1 The upward angle (in the middle) compared to the straight-face filter 16 can reduce airflow impact loss to a certain extent in the current structure, ensure the transmission efficiency of fresh air in the channel, and avoid noise caused by airflow impact, thus improving the quiet experience for users.

[0086] The fresh air device 1 may also include an arc-shaped track 17 adapted to the filter screen 16. The two sides of the filter screen 16 are placed in the arc-shaped track 17 on the corresponding sides. The filter screen 16 can be pulled out by moving along the arc-shaped track 17, so as to facilitate the disassembly and installation of the filter screen 16.

[0087] The filter screen 16 is slidably mounted on opposite sides within the corresponding arc-shaped tracks 17. The filter screen 16 can reciprocate along the arc-shaped tracks 17 in a pull-out motion. The curvature of the arc-shaped tracks 17 matches the curvature of the filter screen 16, providing guidance and limiting for the movement of the filter screen 16, while also ensuring the structural stability of the filter screen 16 in the installed state, preventing the filter screen 16 from shifting or loosening due to airflow impact. This track-type structure replaces the traditional bolt fixing method, realizing the sliding installation and removal of the filter screen 16, greatly simplifying the installation and removal process.

[0088] The filter screen 16 has a snap-fit ​​plate 161 at one end, with at least one snap-fit ​​hole 162 on the snap-fit ​​plate 161. The housing of the fresh air device 1 has a snap-fit ​​structure 163 that engages with the snap-fit ​​hole 162. When the filter screen 16 is in the installed state, the snap-fit ​​structure 163 snaps into the snap-fit ​​hole 162, thereby installing the filter screen 16. When it is necessary to remove the filter screen 16, the snap-fit ​​structure 163 can be pressed to disengage it from the snap-fit ​​hole 162, thereby removing the filter screen 16. That is, in this embodiment, the snap-fit ​​structure 163 and the snap-fit ​​hole 162 enable the detachable installation of the filter screen 16.

[0089] For example, when the filter screen 16 is pushed into the housing along the arc-shaped track 17 and is in the installed position, the snap-fit ​​structure 163 automatically snaps into the snap-fit ​​hole 162 under elastic action. Through the snap-fit ​​engagement with the snap-fit ​​hole 162, the filter screen 16 is quickly and securely installed without the need for any tools, making the operation convenient. When it is necessary to disassemble the filter screen 16 for cleaning or replacement, the user only needs to press the snap-fit ​​structure 163 with their finger to cause it to elastically deform and disengage from the snap-fit ​​hole 162, releasing the snap-fit ​​limit. Then, the filter screen 16 can be pulled out along the arc-shaped track 17 by a pulling action to complete the disassembly. The entire disassembly and assembly process is efficient and labor-saving.

[0090] The filter screen 16 has a handle structure 164 at one end. The handle structure 164 and the snap-fit ​​plate 161 are located at the same end of the filter screen 16, and the handle structure 164 is placed on the side of the snap-fit ​​plate 161 away from the housing. The handle structure 164 provides a force point for the user to pull the filter screen 16, making it easy for the user to hold the handle structure 164 and drive the filter screen 16 to move smoothly along the arc-shaped track 17. This further improves the convenience of the pull-out installation and removal of the filter screen 16, so that the user can pull the filter screen 16 along the arc-shaped track 17 through the handle structure 164 to achieve the pull-out removal and installation of the filter screen 16.

[0091] The handle structure 164 and the snap-fit ​​plate 161 can be integrally formed or separately formed and then fixedly connected together. The fixed connection method can be adhesive, welding or other connection methods, and there is no limitation on this.

[0092] In this embodiment, the curved filter surface design not only increases the contact area between the filter 16 and the fresh air, improving the impurity filtration efficiency, but also guides the airflow to form a directional air outlet angle, reducing the impact loss and eddy current phenomenon in the airflow channel. This ensures the fresh air transmission efficiency while reducing airflow noise, achieving a triple effect of "high-efficiency filtration + low-resistance air supply + quiet operation". Moreover, the cooperation between the curved filter 16 and the arc-shaped track 17 allows for better pulling of the filter 16. Combined with the snap-on connection structure and the handle structure 164, the filter 16 can be disassembled and installed without the need for screwdrivers, wrenches, or other tools. Users can easily disassemble and install the filter 16 by simply "pressing the snap and pulling the handle", significantly reducing the operational threshold for cleaning and replacing the filter 16 and solving the technical problems of cumbersome disassembly and inconvenient maintenance of the filter 16 in traditional fresh air devices. Moreover, the arc-shaped track 17 provides all-round guidance and limit for the filter screen 16, and the snap-fit ​​structure 163 realizes the reliable fixation of the filter screen 16 after installation. The dual structure can effectively prevent the filter screen 16 from shifting, loosening or falling off due to the vibration of the fan 11 and the impact of airflow during the operation of the fresh air device 1, ensuring that the filter screen 16 is always in the best filtration position, improving the reliability and service life of the device.

[0093] In one exemplary embodiment, reference Figures 1 to 10 As shown, a fresh air device 1, a ducted air conditioner equipped with the fresh air device 1, and a control method for the ducted air conditioner are provided. In this embodiment, the indoor unit 2 of the ducted air conditioner adopts a cross-flow fan structure, the evaporator is arranged at the indoor unit air intake 30 of the indoor unit 2, and the fresh air device 1 is located on the left side of the ducted air conditioner. A fresh air duct (not shown in the figure) is connected to the fresh air intake 50 of the fresh air device 1 for transmitting fresh air.

[0094] The fresh air unit 1 is internally equipped with a curved filter 16, the convex side of which faces the fresh air intake side. Compared to a traditional straight (i.e., flat) filter 16, this is different. Figure 7 As mentioned above, after the airflow passes through the filter 16 on the curved surface, it will form an upward air outlet angle, which can effectively reduce airflow impact loss in the existing structure.

[0095] To address the maintenance needs of the filter 16 in the fresh air unit 1, this embodiment designs a pull-out filter 16, specifically as follows: Figures 7 to 9 As shown. The procedure for removing filter screen 16 is as follows: First press... Figure 9 As shown, after the three latching structures 163 are released, the user can gently lift the filter 16 by holding the handle structure 164 and pulling it upwards, thus pulling the entire filter 16 out along the arc-shaped track 17. Compared with the straight installation structure, this arc-shaped track 17-type pull-out structure requires less side operating space, making it easier for users to pull out and install the filter. In addition, the curved surface of the filter 16 itself can guide the fresh air flow, further reducing airflow impact.

[0096] After the fresh airflow enters the fresh air device 1, the connection and disconnection of the two air outlet channels can be realized through the coordinated control of the first baffle 14 and the second baffle 15. The specific control structure is as follows: Figure 1 As shown in Figure 4, a first baffle plate 14 is provided at the first fresh air outlet 10 of the first section of the air outlet duct 12 connected to the air outlet of the centrifugal fan 11, for controlling the opening and closing of the first fresh air outlet 10. A second baffle plate 15 can control the opening and closing of the first section of the air outlet duct 12 and the second section of the air outlet duct, thereby controlling whether fresh air is discharged through the second fresh air outlet 20.

[0097] In this embodiment, the fresh air device 1 has two air outlet modes, as follows: The first air outlet mode (as shown in Figure 5): The first baffle plate 14 rotates in a specified direction (e.g., clockwise) to form an angle 'a' with the horizontal direction (the recommended range for 'a' is 30°-70°; if the angle is too small, it will not effectively guide the airflow and may cause excessive airflow impact; if the angle is too large, it will reduce the effective area of ​​the air outlet and affect the air volume). At the same time, the second baffle plate 15 rotates to contact the top of the second air outlet channel 13. At this time, the first fresh air outlet 10 is closed, and fresh air can only be discharged from the second fresh air outlet 20. After the fresh air is discharged, since the indoor unit 2 is in the on state, the fresh air will be drawn into the indoor unit 2 and heat-exchanged through the heat exchanger. Then, it will be delivered by the cross-flow fan 11 to the lower air outlet of the indoor unit 2 and discharged. Regardless of the initial temperature of the fresh air, the discharge after being processed by the indoor unit 2 can reduce the impact on the indoor temperature.

[0098] The second air outlet mode (as shown in Figure 6): The first baffle plate 14 can be rotated counterclockwise by b (the recommended range of b is 0°-90°) to open the first fresh air outlet 10. At the same time, the second baffle plate 15 rotates to contact the bottom surface of the second air outlet channel 13, so that the first air outlet channel 12 and the second air outlet channel 13 are cut off. At this time, fresh air can only be discharged from the first fresh air outlet 10. The airflow path is shown in Figure 6.

[0099] It should be noted that when the fresh air device 1 discharges air from the first fresh air outlet 10, the air outlet angle can be adjusted; this embodiment can also intelligently adjust the air outlet mode and downward air outlet angle of the fresh air device 1 according to the different temperature differences between indoors and outdoors. For details, please refer to [reference needed]. Figure 6 and Figure 10 As shown.

[0100] The fresh air device 1 in this embodiment can have two air outlet methods. One air outlet method directly discharges fresh air from the first fresh air outlet 10 to the space to be regulated. In this case, fresh air can be directly introduced to quickly reduce the carbon dioxide concentration in the space to be regulated. The other air outlet method transmits fresh air to the indoor unit 2 and then discharges it to the space to be regulated, which has less impact on the indoor temperature. That is, this embodiment can adopt different air outlet methods according to different situations. It can effectively avoid the problem of abnormal perceived temperature caused by excessive temperature difference between the inside and outside of the space to be regulated. At the same time, when the temperature difference between the inside and outside of the space to be regulated is not large, fresh air can be directly introduced to quickly reduce the carbon dioxide concentration in the space to be regulated, which can greatly improve the user experience. In addition, in this embodiment, a pull-out curved filter 16 is used, which makes it easier to remove and install the filter 16, and can also guide the airflow to form a directional air outlet angle, reducing the impact loss and turbulence phenomenon of airflow in the channel. Moreover, the first baffle plate 14 of the fresh air device 1 is designed to rotate and change its angle, which can better adapt to the problem of the fresh air introduced by the fresh air device 1 mixing with the temperature of the space to be regulated in both cooling and heating modes, and further improve the user experience.

[0101] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0102] It should be noted that the terms "one implementation," "embodiment," "exemplary embodiment," and "some embodiments" used in the specification indicate that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0103] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or air conditioning apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or air conditioning apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or air conditioning apparatus that includes said element.

[0104] The above embodiments are merely preferred embodiments provided to fully illustrate this application, and the scope of protection of this application is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on this application are all within the scope of protection of this application.

Claims

1. A fresh air device, characterized in that, The fresh air device is applied to a ducted air conditioner. The fresh air device includes a first air outlet channel and a second air outlet channel. The first air inlet of the first air outlet channel is connected to the air outlet of the fan of the fresh air device. The first section of the air outlet duct is provided with a first fresh air outlet, which is used to discharge gas from the space to be adjusted by the air duct machine. A first baffle is provided at the position of the first fresh air outlet, which is used to control the opening or closing of the first fresh air outlet. The second air outlet channel is connected to the first air outlet channel, and a second baffle is provided at the connection position between the second air outlet channel and the first air outlet channel to control the connection or closure between the first air outlet channel and the second air outlet channel; The second section of the air outlet duct is provided with a second fresh air outlet, which is used to transmit the discharged gas to the indoor unit of the air duct machine, so that the gas is discharged to the space to be regulated after passing through the indoor unit.

2. The fresh air device according to claim 1, characterized in that, The second fresh air outlet and the indoor unit's air intake are located on the same side of the ducted air conditioner, so that the indoor unit can draw the gas discharged from the second fresh air outlet into the indoor unit through the indoor unit's air intake.

3. The fresh air device according to claim 1, characterized in that, The second fresh air outlet is connected to the indoor unit's air intake, so that the gas discharged from the second fresh air outlet enters the indoor unit through the indoor unit's air intake.

4. The fresh air device according to claim 1, characterized in that, The fresh air device has a first air outlet mode and a second air outlet mode; In the first air outlet mode, the first baffle plate closes the first fresh air outlet, and the second baffle plate controls the connection between the first air outlet channel and the second air outlet channel. In the second air outlet mode, the first baffle opens the first fresh air outlet, and the second baffle controls the closure between the first section of the air outlet channel and the second section of the air outlet channel.

5. The fresh air device according to claim 4, characterized in that, In the first air outlet mode, the first baffle plate rotates into the first air outlet channel, and the free end of the first baffle plate abuts against the side of the first air outlet channel opposite to the second air outlet channel, and the included angle between the first baffle plate and the axis of the second air outlet channel is greater than or equal to 30° and less than or equal to 70°.

6. The fresh air device according to claim 5, characterized in that, In the first air outlet mode, the second baffle plate of the fresh air device rotates into the second section of the air outlet channel, and the free end of the second baffle plate abuts against the side of the second section of the air outlet channel opposite to the first baffle plate.

7. The fresh air device according to claim 4, characterized in that, In the second air outlet mode, the first baffle plate of the fresh air device rotates to the outside of the first air outlet channel, and the included angle between the first baffle plate and the axial direction of the first air outlet channel is greater than 0° and less than or equal to 90°.

8. The fresh air device according to claim 1, characterized in that, The first wind deflector and / or the second wind deflector are constructed as straight plates.

9. The fresh air device according to any one of claims 1-8, characterized in that, The fresh air device includes a filter screen, the filter screen having a curved filter surface, and the convex side of the filter surface facing the air intake side of the filter screen.

10. The fresh air device according to claim 9, characterized in that, The fresh air device includes an arc-shaped track, and the filter screen is placed on opposite sides within the arc-shaped track. The filter screen moves in a pull-out motion by moving along the arc-shaped track.

11. The fresh air device according to claim 9, characterized in that, One end of the filter screen is provided with a snap-fit ​​plate, the snap-fit ​​plate is provided with at least one snap-fit ​​hole, and the housing of the fresh air device is provided with a snap-fit ​​structure that cooperates with the snap-fit ​​hole; When the filter screen is in the installed state, the snap-fit ​​structure snaps into the snap-fit ​​hole.

12. The fresh air device according to claim 11, characterized in that, One end of the filter screen is provided with a handle structure, which is located on the side of the snap-fit ​​plate opposite to the housing.

13. A ducted air conditioner, characterized in that, The ducted air conditioning unit includes an indoor unit and a fresh air device as described in any one of claims 1-12, wherein the fresh air device is located on one side of the indoor unit.

14. A control method, characterized in that, The control method is applied to the duct air conditioner as described in claim 13, wherein the fresh air device of the duct air conditioner has a first air outlet mode and a second air outlet mode; In the first air outlet mode, the first baffle plate closes the first fresh air outlet, and the second baffle plate controls the connection between the first air outlet channel and the second air outlet channel. In the second air outlet mode, the first baffle opens the first fresh air outlet, and the second baffle controls the closure between the first section of the air outlet channel and the second section of the air outlet channel. The control method includes: Based on the temperature difference between the inside and outside of the space to be adjusted by the duct air conditioner, the operating mode of the fresh air device of the duct air conditioner is adjusted; wherein, the operating mode includes the first air outlet mode and the second air outlet mode.

15. The control method according to claim 14, characterized in that, The method of adjusting the operating mode of the fresh air device of the ducted air conditioner based on the temperature difference between the inside and outside of the space to be adjusted by the ducted air conditioner includes: If it is determined that the internal and external temperature difference is greater than the set temperature difference threshold, then the fresh air device is controlled to be in the first air outlet mode.

16. The control method according to claim 14, characterized in that, The method of adjusting the operating mode of the fresh air device of the ducted air conditioner based on the temperature difference between the inside and outside of the space to be adjusted by the ducted air conditioner includes: If it is determined that the internal and external temperature difference is less than or equal to the set temperature difference threshold, then the fresh air device is controlled to be in the second air outlet mode.

17. The control method according to any one of claims 14-16, characterized in that, The control method includes: When the fresh air device is in the second air outlet mode, if the indoor unit is in the heating mode, the angle between the first baffle and the horizontal direction is controlled to be greater than 0° and less than or equal to 45°.

18. The control method according to any one of claims 14-16, characterized in that, The control method includes: When the fresh air device is in the second air outlet mode, if the indoor unit is in the cooling mode, the angle between the first baffle and the horizontal direction is controlled to be greater than 45° and less than or equal to 90°.

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