Air duct structure, fresh air conditioner and control method

Abstract

The application provides a duct structure, a fresh air conditioner and a control method. The duct structure comprises a duct body, a reversing device and a sterilization assembly. The duct body is in communication with the reversing device. The reversing device has a first state and a second state. When the reversing device is in the first state, the reversing device introduces fresh air from the outdoor to the indoor. When the reversing device is in the second state, the reversing device sends air from the indoor to the outdoor. When the reversing device is in the second state, the sterilization assembly sterilizes the duct body. The application can switch the indoor air to flow to the duct body through the reversing device, and form return air in the duct body. The flow of the air is fully utilized, so that the sterilization assembly can completely sterilize the duct body, and the duct body can be kept dry under the action of the air even if the duct body is sterilized.

Description

Technical Field

[0001] This invention belongs to the field of air conditioner technology, specifically relating to a duct structure, a fresh air air conditioner, and a control method. Background Technology

[0002] Ozone sterilization is thorough and residue-free, killing vegetative bacteria, spores, viruses, fungi, and mold, and also removing odors. Ozone rapidly decomposes into oxygen and individual oxygen atoms, which can then combine to form oxygen molecules, leaving no toxic residues. Therefore, ozone is a pollution-free sterilizing agent. As a gas, ozone can quickly diffuse throughout the sterilization space, ensuring thorough sterilization. In contrast, traditional fresh air disinfection methods, whether ultraviolet light or chemical fumigation, have drawbacks such as incomplete sterilization, dead spots, residual pollution, or odors.

[0003] Air conditioners are mostly used in enclosed spaces, and fresh air conditioners draw in fresh outdoor air through ducts. The outdoor environment is variable, relatively humid, and carries dust and bacteria. Currently, there are methods for sterilizing the extracted fresh air, such as using filters and ultraviolet sterilization. However, these methods are not effective in sterilizing and repelling insects from the ducts. Furthermore, the ducts are not easy to disassemble and clean, and bacteria and insects can easily grow inside them. Summary of the Invention

[0004] This invention provides a duct structure, a fresh air conditioner, and a control method, which can solve the technical problem that existing fresh air sterilization methods cannot effectively sterilize and repel insects from ducts.

[0005] This invention provides a duct structure, including a duct body, a reversing device, and a sterilization component;

[0006] The duct body is connected to the reversing device;

[0007] The reversing device has a first state and a second state. In the first state, the reversing device introduces fresh air from the outside to the inside; in the second state, the reversing device supplies air from the inside to the outside.

[0008] When the reversing device is in the second state, the duct body is sterilized by the sterilization component.

[0009] In some implementations, the sterilization component includes an ozone generating module for delivering ozone into the duct body.

[0010] In some embodiments, the ozone generating module is located in the reversing device, and the sterilization component also includes an ozone detection module for detecting the ozone concentration in the reversing device; the ozone generating module delivers ozone to the duct body through the air supply component.

[0011] In some embodiments, the commutation device is equipped with an ultraviolet sterilization module, which is used to accelerate the decomposition of ozone.

[0012] In some embodiments, a first control module is also included. When the sterilization component includes an ozone generating module and an ozone detection module, and the commutation device is equipped with an ultraviolet sterilization module, the first control module is used to control the ozone generating module, the ozone detection module, and the ultraviolet sterilization module.

[0013] In some embodiments, the reversing device includes a housing, a first damper, and a second damper;

[0014] The enclosure has an air inlet and an air outlet. A first air damper is rotatably installed at the air outlet and can cover the air outlet. A second air damper is rotatably installed at the air inlet and can cover the air inlet.

[0015] In some embodiments, the first damper includes a first door panel and a second door panel that rotate in opposite directions, the first door panel and the second door panel having a first position and a second position, the first door panel and the second door panel being in the first position and being far apart from each other to open the air outlet; the first door panel and the second door panel being in the second position and being connected to each other to close the air outlet.

[0016] In some embodiments, the second damper includes a third door panel and a fourth door panel that rotate in opposite directions, the third door panel and the fourth door panel having a third position and a fourth position, the third door panel and the fourth door panel being in the third position, the third door panel and the fourth door panel being away from each other to open the air inlet; the third door panel and the fourth door panel being in the fourth position, the third door panel and the fourth door panel being connected to each other to close the air inlet.

[0017] A fresh air air conditioner includes a fresh air housing and a fan, and also includes a duct structure, wherein the duct structure is the aforementioned duct structure;

[0018] The fan is installed in the fresh air casing, and the reversing device is connected to the fresh air casing on the side away from the duct body;

[0019] When the reversing device is in the first state, the duct body introduces fresh air from the outside to the inside through the fan; when the reversing device is in the second state, the duct body supplies air from the inside to the outside through the fan.

[0020] A control method for a duct structure, the control method being used to control the aforementioned duct structure, the sterilization component including an ozone generating module and an ozone detection module, and the reversing device being equipped with an ultraviolet sterilization module, the control method including:

[0021] Switch the commutation device to the second state and turn on the ozone generation module, ozone detection module and ultraviolet sterilization module.

[0022] When the ozone concentration in the reversing device is greater than the first set value, the indoor air is sent to the outside, blowing ozone into the air duct body and entering the ozone sterilization process.

[0023] After the ozone sterilization process has run for the first time, the ozone generating module stops working.

[0024] In some embodiments, the control method further includes a residual ozone decomposition process, which includes:

[0025] After the ozone generating module stops working, the indoor air supply continues to supply air to the outside until the ozone concentration remains below the second set value for the second time period. Then the indoor air supply stops, and the ozone detection module and the ultraviolet sterilization module continue to work.

[0026] If the ozone concentration remains below the second set value for the third time period, the ozone detection module and the ultraviolet sterilization module will stop working and the switching device will switch to the first state.

[0027] The duct structure, fresh air conditioner, and control method provided by this invention have the following beneficial effects:

[0028] When the reversing device is in its first state, air enters the duct body and flows into the duct before being delivered into the room. When the reversing device is in its second state, indoor air enters the switching state and is then delivered into the duct body. During this process, the sterilization component sterilizes the duct body through the flowing air. This invention, through the reversing device, can switch indoor airflow towards the duct body, creating return air within the duct body. This fully utilizes the fluidity of the air, allowing the sterilization component to thoroughly sterilize the duct body. Furthermore, the duct body remains dry even after sterilization due to the airflow. When the reversing device is in its first state, it ensures that the air entering the room from the duct body is clean, fresh, and odorless. Attached Figure Description

[0029] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the duct structure according to an embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the fresh air flow direction when the reversing device is in the first state according to an embodiment of the present invention;

[0032] Figure 3This is a schematic diagram of the first and second dampers when the reversing device is in the first state according to an embodiment of the present invention;

[0033] Figure 4 This is a schematic diagram of the return airflow direction when the reversing device is in the second state according to an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the first and second dampers when the reversing device is in the second state according to an embodiment of the present invention;

[0035] Figure 6 This is a logic control diagram of the control method for the duct structure according to an embodiment of the present invention.

[0036] Attached Figures: 1-Duct body; 2-Reversing device; 31-Ozone generating module; 32-Ozone detection module; 33-Ultraviolet sterilization module; 41-Box body; 411-First chamber; 412-Second chamber; 401-Air inlet; 402-Air outlet; 42-First damper; 421-First door panel; 422-Second door panel; 423-First motor; 424-Second motor; 43-Second damper; 431-Third door panel; 432-Third motor; 5-Fresh air casing; 501-Fresh air outlet; 6-Fan. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0039] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0040] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0041] See also Figure 1 , Figure 2 and Figure 4 As shown, according to an embodiment of the present invention, a duct structure is provided, including a duct body 1, a reversing device 2, and a sterilization component; the duct body 1 is connected to the reversing device 2; the reversing device 2 has a first state and a second state, the reversing device 2 is in the first state, the reversing device 2 introduces fresh air from the outside to the inside; the reversing device 2 is in the second state, the reversing device 2 supplies air from the inside to the outside; wherein, when the reversing device 2 is in the second state, the duct body 1 is sterilized by the sterilization component.

[0042] In this embodiment, when the reversing device 2 is in the first state, air enters the duct body 1 through the reversing device 2 and is then delivered into the room. When the reversing device 2 is in the second state, indoor air enters the reversing device 2 and is then delivered into the duct body 1. During this process, the sterilization component sterilizes the duct body 1 through the flowing air. This invention can switch the indoor air to flow towards the duct body 1 through the reversing device 2, forming a return air in the duct body 1. This fully utilizes the fluidity of the air, enabling the sterilization component to thoroughly sterilize the duct body 1. Furthermore, under the action of the air, even after sterilization, the duct body 1 remains dry. When the reversing device 2 is in the first state, it ensures that the air entering the room from the duct body 1 is clean, fresh, and odorless.

[0043] The reversing device 2 includes a housing 41, a first damper 42, and a second damper 43. The housing 41 has an air inlet 401 and an air outlet 402. The first damper 42 is rotatably disposed at the air outlet 402 and can cover the air outlet 402. The second damper 43 is rotatably disposed at the air inlet 401 and can cover the air inlet 401.

[0044] In this embodiment, a first damper 42 and a second damper 43 are provided to cooperate with each other, so as to flexibly adjust the opening and closing states of the air inlet 401 and the air outlet 402, thereby switching the reversing device 2 to the first state or the second state, which can not only meet the air intake requirements of the present invention, but also form return air in the duct body 1.

[0045] In one specific implementation, the housing 41 includes a first chamber 411 and a second chamber 412. The second chamber 412 is located above the first chamber 411 (as shown in the figure). One side of the first chamber 411 is connected to the air duct body 1, and an air outlet 402 is provided on the other side of the first chamber 411. The second chamber 412 is provided with an air inlet 401.

[0046] In this embodiment, when the reversing device 2 is in the first state, the first damper 42 rotates at a certain angle, causing the air outlet 402 to open. Outdoor air flows sequentially through the duct body 1 and the first chamber 411 before entering the room. During this process, the second damper 43 rotates at a certain angle, causing the air inlet 401 to close, preventing indoor air from entering the second chamber 412. When the reversing device 2 is in the second state, the first damper 42 rotates at the opposite angle, causing the air outlet 402 to close, and the second damper 43 rotates at the opposite angle, causing the air inlet 401 to open. Indoor air flows sequentially through the second chamber 412, the first chamber 411, and the duct body 1, thereby forming return air in the duct body 1. The housing 41 of the present invention includes a first chamber 411 and a second chamber 412. The position of the air inlet 401 can be flexibly adjusted according to the air intake requirements. Furthermore, the air intake path and the air outlet path with different flow directions are formed in the housing 41 according to the rotation of the first damper 42 and the second damper 43.

[0047] See also Figure 3As shown, the first damper 42 includes a first door panel 421 and a second door panel 422 that rotate in opposite directions. The first door panel 421 and the second door panel 422 are driven by a first motor 423 and a second motor 424, respectively. The first motor 423 and the second motor 424 are respectively mounted on the housing 41. The first door panel 421 and the second door panel 422 have a first position and a second position. When the first door panel 421 and the second door panel 422 are in the first position, they are far apart from each other to open the air outlet 402. When the first door panel 421 and the second door panel 422 are in the second position, they are connected to each other to close the air outlet 402.

[0048] In one specific implementation, a first through hole is provided at the connection between the first chamber 411 and the second chamber 412. A first door panel 421 is disposed in the first through hole, and the area of ​​the first door panel 421 is larger than the area of ​​the first through hole and the area of ​​the air outlet 402. When the first door panel 421 is in the first position, it is horizontally positioned, covering the first through hole, and the air outlet 402 is open. At this time, the air in the duct body 1 enters the first chamber 411, thereby introducing outdoor air into the room. When the first door panel 421 is in the second position, it is vertically positioned, covering the air outlet 402. The first through hole connects the first chamber 411 and the second chamber 412. At this time, the indoor air first enters the second chamber 412, and then sequentially enters the first chamber 411 and the duct body 1, thereby introducing indoor air into the outside. The first door panel 421 of the present invention serves to separate the box 41, reasonably divide the space inside the box 41, and can also change the communication relationship between the first chamber 411 and the second chamber 412, so that the air intake and return paths of the box 41 are different, thereby ensuring that the air duct body 1 can both take in air normally and introduce indoor air into the air duct body 1.

[0049] As a specific implementation, the air outlet 402 of the present invention can be a closed structure, that is, the air outlet 402 can be covered by the first door panel 421 alone, or the air outlet 402 can be covered by the first door panel 421 and the second door panel 422 being connected to each other. In this embodiment, the preferred method is that the air outlet 402 can be covered by the first door panel 421 alone.

[0050] In one specific implementation, after applying the duct structure to the fresh air conditioner, a second through hole is provided at the bottom of the second chamber 412. The second door panel 422 is tilted and installed on the housing 41. The second door panel 422 can rotate relative to the second through hole under the action of the second motor 424. When the second door panel 422 is in the first position, it covers the second through hole. At this time, the air introduced from the outside into the first chamber 411 will not flow out of the second through hole, but will be drawn into the room by the fan 6. When the door panel is in the second position, it rotates in the opposite direction, and the second through hole is open. Under the action of the fan 6, the indoor air is drawn into the second chamber 412 through the second through hole and sent to the second chamber 412. The air in the second chamber 412 then flows into the first chamber 411 and the duct body 1 in sequence. The second door panel 422 of this invention can prevent air from flowing out of the first chamber 411 and also provide a channel for the fan 6 to draw in indoor air.

[0051] See also Figure 5 As shown, the second damper 43 includes a third door plate 431 and a fourth door plate that rotate in opposite directions. The third door plate 431 and the fourth door plate are driven by a third motor 432 and a fourth motor, respectively. The third motor 432 and the fourth motor are respectively mounted on the housing 41. The third door plate 431 and the fourth door plate have a third position and a fourth position. When the third door plate 431 and the fourth door plate are in the third position, they are far apart from each other to open the air inlet 401. When the third door plate 431 and the fourth door plate are in the fourth position, they are connected to each other to close the air inlet 401.

[0052] In one specific implementation, the third door panel 431 and the fourth door panel are arranged opposite to each other, and their rotation directions are opposite, forming a double-door structure. When the third door panel 431 and the fourth door panel are in the third position, they are far apart from each other, so that the air inlet 401 is open, and the indoor air can smoothly enter the second chamber 412. At this time, the first door panel 421 is in the second position, and the first through hole connects the first chamber 411 and the second chamber 412, thereby allowing the indoor air to flow into the air duct body 1. When the third door panel 431 and the fourth door panel are in the fourth position, they are connected to each other, so that the air inlet 401 is closed. At this time, the first door panel 421 is in the first position, the first through hole is covered, and the air can only flow from the air duct body 1 into the first chamber 411, thereby introducing outdoor air into the room. The third door panel 431 and the fourth door panel of the present invention are used in conjunction to flexibly adjust the opening and closing state of the air inlet 401.

[0053] The sterilization component includes an ozone generating module 31, which is used to deliver ozone into the duct body 1. Specifically, the ozone generating module 31 is an ozone generator. When the reversing device 2 is in the first state, that is, when outdoor air is introduced into the room, the ozone generating module 31 does not work; when the reversing device 2 is in the second state, the ozone generating module 31 works and can release ozone, which is introduced from the room into the duct body 1 to form return air. The return air brings a large amount of ozone into the duct body 1, thereby thoroughly sterilizing the duct body 1. After sterilization, the return air can thoroughly dry the duct body 1.

[0054] The ozone generating module 31 is installed in the reversing device 2. The sterilization component also includes an ozone detection module 32, which is used to detect the ozone concentration in the reversing device 2. The ozone generating module 31 delivers ozone to the duct body 1 through the air supply component.

[0055] Specifically, the ozone generating module 31 is located in the first chamber 411. When the reversing device 2 is in the second state, the air in the room flows from the second chamber 412 into the first chamber 411. The ozone generated by the ozone generating module 31 is also first released into the first chamber 411. When the air in the first chamber 411 flows into the duct body 1, it carries the ozone into the duct body 1. During this process, the ozone detection module 32 can detect the ozone concentration in the first chamber 411. Only when the ozone concentration reaches a certain value will the ozone in the first chamber 411 be released into the duct body 1.

[0056] In one specific implementation, the air supply component is a fan 6, which can be independently installed outside the first chamber 411. In this embodiment, the air supply component is the fan 6 of a fresh air conditioning unit. When the reversing device 2 is in the first state, the fan 6 draws air into the duct body 1 and the first chamber 411, and then into the room. When the reversing device 2 is in the second state, the fan 6 draws in the air from the room and sends it into the second chamber 412, the first chamber 411, and the duct body 1.

[0057] The reversing device 2 is equipped with an ultraviolet (UV) sterilization module 33, which accelerates the decomposition of ozone. UV light catalyzes the decomposition of ozone, rapidly breaking it down into oxides, thus enhancing the sterilization effect of the duct body 1 during ozone sterilization. Even after the ozone generating module 31 stops working, some ozone remains in the housing 41. The UV sterilization module 33 continues to operate, accelerating the decomposition of the remaining ozone and reducing ozone residue. Furthermore, the UV sterilization module 33 can be activated independently when the reversing device 2 is in its first state, i.e., when air is drawn from outdoors to indoors, to disinfect the fresh air drawn into the duct body 1.

[0058] It also includes a first control module. When the sterilization component includes an ozone generating module 31 and an ozone detection module 32, and the commutation device 2 is equipped with an ultraviolet sterilization module 33, the first control module is used to control the ozone generating module 31, the ozone detection module 32, and the ultraviolet sterilization module 33.

[0059] In this embodiment, the first control module is a controller. The first control module can flexibly adjust the operating status of the ozone generating module 31, the ozone detection module 32, and the ultraviolet sterilization module 33 based on the ozone concentration in the first chamber 411 and the operating time of the ozone generating module 31. Preferably, the first control module is also electrically connected to the first motor 423, the second motor 424, the third motor 432, and the fourth motor, thereby flexibly controlling the ozone generating module 31, the ozone detection module 32, and the ultraviolet sterilization module 33 according to the opening and closing states of the air inlet 401 and the air outlet 402.

[0060] A fresh air air conditioner includes a fresh air housing 5 and a fan 6, and also includes a duct structure, which is the duct structure described above.

[0061] The fan 6 is installed in the fresh air housing 5, and the reversing device 2 is connected to the fresh air housing 5 on the side away from the duct body 1. When the reversing device 2 is in the first state, the duct body 1 introduces fresh air from the outside to the inside through the fan 6. When the reversing device 2 is in the second state, the duct body 1 sends air from the inside to the outside through the fan 6.

[0062] In one specific implementation, after applying the duct structure to the fresh air conditioning system, the fan 6 is positioned facing the air outlet 402, and the fresh air housing 5 is provided with a fresh air outlet 501, which is positioned opposite to the air inlet 401. When the first door panel 421 and the second door panel 422 move away from each other, the air outlet 402 opens, and the fan 6 draws in air through the air outlet 402 and sends it into the room through the fresh air outlet 501. At this time, the third door panel 431 and the fourth door panel are connected to each other, closing the air inlet 401 and keeping the fresh air outlet 501 open. That is, in this implementation, both the air inlet 401 and the fresh air outlet 501 are opened by changing the rotation of the second damper 43, and their opening and closing states are opposite at the same time. When the first door panel 421 and the second door panel 422 are connected, the air outlet 402 is closed and the second through hole is opened. The fan 6 draws in indoor air through the second through hole and sends it into the second chamber 412. At this time, the third door panel 431 and the fourth door panel move away from each other and close the fresh air outlet 501, while the air inlet 401 is open. The first through hole is also open, and the air in the second chamber 412 flows into the first chamber 411 and the duct body 1 and is sent to the outside. By setting the first air damper 42 and the second air damper 43 inside the box, the space inside the box 41 is reasonably isolated. Without affecting the normal air intake requirements of the fresh air conditioner, the return air can be formed in the duct body 1 by changing the position of the first air damper 42 and the second air damper 43, thus changing the inherent single air intake mode of the fresh air conditioner.

[0063] A control method for a duct structure, the control method being used to control the aforementioned duct structure, the sterilization component including an ozone generating module 31 and an ozone detection module 32, and the reversing device 2 being equipped with an ultraviolet sterilization module 33, the control method including:

[0064] Switch the commutation device 2 to the second state and turn on the ozone generation module 31, ozone detection module 32 and ultraviolet sterilization module 33.

[0065] When the ozone concentration in the reversing device 2 is greater than the first set value XPPM, the indoor air is sent to the outside, blowing ozone into the air duct body 1 and entering the ozone sterilization process.

[0066] After the ozone sterilization process has been running for the first time for Y minutes, the ozone generating module 31 stops working.

[0067] The present invention provides a reversing device 2 for changing the airflow direction on the basis of the existing duct body 1. The reversing device 2 is flexible and can meet the needs of fresh air and return air, and fully improves the flow of return air. When used in conjunction with the ozone generating module 31 and the ultraviolet sterilization module 33, it can achieve sterilization of the duct body 1 and disinfection of fresh air, keep the duct body 1 dry, and ensure that the fresh air is clean and odorless.

[0068] The control methods also include the residual ozone decomposition process, which includes:

[0069] After the ozone generating module 31 stops working, the indoor air supply continues to the outside until the ozone concentration is lower than the second set value ZPPM. Then, it runs for a second duration Jmin, and the indoor air supply stops. The ozone detection module 32 and the ultraviolet sterilization module 33 continue to work.

[0070] If the ozone concentration remains below the second set value ZPPM for the third time period Kmin, the ozone detection module 32 and the ultraviolet sterilization module 33 stop working, and the switching device 2 is switched to the first state.

[0071] In this embodiment, the ozone remaining in the first chamber 411 is rapidly decomposed by the continuous operation of the ultraviolet sterilization module 33, thus preventing the ozone from being stored in the duct body 1 for a long time without being discharged.

[0072] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0073] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention. The above are merely preferred embodiments of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the protection scope of the present invention.

Claims

1. A duct structure, comprising a duct body (1), characterized in that, It also includes a reversing device (2) and a sterilization component; The duct body (1) is connected to the reversing device (2); The reversing device (2) has a first state and a second state. In the first state, the reversing device (2) introduces fresh air from the outside to the inside. In the second state, the reversing device (2) supplies air from the inside to the outside. When the reversing device (2) is in the second state, the duct body (1) is sterilized by the sterilization component; The reversing device (2) includes a housing (41), a first damper (42), and a second damper (43); the housing (41) has an air inlet (401) and an air outlet (402), the first damper (42) is rotatably disposed at the air outlet (402), and the first damper (42) can cover the air outlet (402); the second damper (43) is rotatably disposed at the air inlet (401), and the second damper (43) can cover the air inlet (401). The housing (41) includes a first chamber (411) and a second chamber (412). One side of the first chamber (411) is connected to the air duct body (1), and the other side of the first chamber (411) is provided with the air outlet (402). The second chamber (412) is provided with the air inlet (401). The sterilization component includes an ozone generating module (31). The ozone generating module (31) is used to deliver ozone into the air duct body (1). The ozone generating module (31) is located in the first chamber (411). The first chamber (411) first stores ozone and then releases ozone into the air duct body (1).

2. The duct structure according to claim 1, characterized in that, The ozone generating module (31) is installed in the reversing device (2), and the sterilization component also includes an ozone detection module (32), which is used to detect the ozone concentration in the reversing device (2); the ozone generating module (31) delivers ozone to the duct body (1) through the air supply component.

3. The duct structure according to claim 1, characterized in that, The commutation device (2) is equipped with an ultraviolet sterilization module (33), which is used to accelerate the decomposition of ozone.

4. The duct structure according to claim 3, characterized in that, It also includes a first control module (34). When the sterilization component includes an ozone generating module (31) and an ozone detection module (32), and the reversing device (2) is provided with an ultraviolet sterilization module (33), the first control module (34) is used to control the ozone generating module (31), the ozone detection module (32) and the ultraviolet sterilization module (33).

5. The duct structure according to claim 1, characterized in that, The first damper (42) includes a first door plate (421) and a second door plate (422) that rotate in opposite directions. The first door plate (421) and the second door plate (422) are driven by a first motor (423) and a second motor (424) respectively. The first motor (423) and the second motor (424) are respectively mounted on the housing (41). The first door panel (421) and the second door panel (422) have a first position and a second position. The first door panel (421) and the second door panel (422) are located in the first position and are far apart from each other to open the air outlet (402). The first door panel (421) and the second door panel (422) are located in the second position and are connected to each other to close the air outlet (402).

6. The duct structure according to claim 1, characterized in that, The second damper (43) includes a third door plate (431) and a fourth door plate that rotate in opposite directions. The third door plate (431) and the fourth door plate are driven by a third motor (432) and a fourth motor, respectively. The third motor (432) and the fourth motor are respectively mounted on the housing (41). The third door panel (431) and the fourth door panel have a third position and a fourth position. The third door panel (431) and the fourth door panel are located in the third position and are far apart from each other to open the air inlet (401). The third door panel (431) and the fourth door panel are located in the fourth position and are connected to each other to close the air inlet (401).

7. A fresh air conditioner, comprising a fresh air housing (5) and a fan (6), characterized in that, It also includes a duct structure, wherein the duct structure is the duct structure described in any one of claims 1 to 5; The fan (6) is installed in the fresh air housing (5), and the reversing device (2) is connected to the fresh air housing (5) on the side away from the air duct body (1). When the reversing device (2) is in the first state, the duct body (1) introduces fresh air from the outside to the inside through the fan (6); when the reversing device (2) is in the second state, the duct body (1) sends air from the inside to the outside through the fan (6).

8. A method for controlling a duct structure, characterized in that, The control method is used to control the duct structure according to any one of claims 1 to 7, wherein the sterilization component includes an ozone generating module (31) and an ozone detection module (32), and the reversing device (2) is provided with an ultraviolet sterilization module (33). The control method includes: Switch the reversing device (2) to the second state and turn on the ozone generating module (31), the ozone detection module (32) and the ultraviolet sterilization module (33). When the ozone concentration in the reversing device (2) is greater than the first set value, the indoor air is sent to the outdoor air, and the ozone is blown into the air duct body (1) to enter the ozone sterilization process. After the ozone sterilization process has been running for a first period of time, the ozone generating module (31) stops working.

9. The control method for the duct structure according to claim 8, characterized in that, The control method further includes a residual ozone decomposition process, which includes: After the ozone generating module (31) stops working, the room continues to supply air to the outside until the ozone concentration is lower than the second set value. After running for a second period of time, the room stops supplying air to the outside, and the ozone detection module (32) and the ultraviolet sterilization module (33) continue to work. If the ozone concentration remains below the second set value for a third time period, the ozone detection module (32) and the ultraviolet sterilization module (33) stop working and switch the reversing device (2) to the first state.

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