Air treatment device

Abstract

The utility model discloses an air treatment device, air treatment device includes: host computer, air duct subassembly, first apron and second apron, and the host computer inside has air treatment cavity, air duct subassembly is connected in host computer, and the first air duct that is equipped with with air treatment cavity intercommunication in air duct subassembly, first apron and second apron selectively with host computer is connected, and first apron is equipped with second air duct, wherein when first apron is connected with host computer, second air duct is communicated with air treatment cavity and blocks the intercommunication of first air duct and air treatment cavity, and when second apron is connected with host computer, first air duct is communicated with air treatment cavity. Air treatment device changes the purification mode of air treatment device through the setting first apron and second apron, can select using the first air duct in air duct subassembly or is using the second air duct on first apron, thereby purifies the scene of different demand amount, improved the applicability of air treatment device.

Description

Technical Field

[0001] This invention relates to the field of air treatment, and more particularly to an air treatment device. Background Technology

[0002] In related technologies, there are generally no dedicated air handling units to directly treat pollutants generated indoors. Furthermore, air handling units cannot adjust airflow according to different airflow conditions, or rather, airflow adjustment mainly relies on the internal duct components of the fan, resulting in the air handling unit's inability to fully adapt to different duct conditions. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of this invention is to provide an air handling device according to this application that, by setting a first cover and a second cover, changes the purification mode of the air handling device, allowing selection of either the first air duct within the air duct assembly or the second air duct on the first cover, thereby purifying air for scenarios with different demand levels and improving the applicability of the air handling device.

[0004] The air handling apparatus according to this application includes: a main unit, an air duct assembly, a first cover plate, and a second cover plate. The main unit has an air handling cavity inside. The air duct assembly is connected to the main unit and has a first air duct communicating with the air handling cavity. The first cover plate and the second cover plate are selectively connected to the main unit, and the first cover plate has a second air duct. When the first cover plate is connected to the main unit, the second air duct communicates with the air handling cavity and blocks the communication between the first air duct and the air handling cavity. When the second cover plate is connected to the main unit, the first air duct communicates with the air handling cavity.

[0005] The air handling unit of this application achieves flexible switching between purification modes by setting a first cover plate and a second cover plate that can be selectively connected. The air handling chamber integrated inside the main unit provides a stable main structural platform for air purification and airflow. The first air duct in the air duct assembly can provide a large suction force to the air inlet set on the air duct assembly, which is suitable for scenarios requiring high-efficiency purification. The second air duct set on the first cover plate provides a high-flow airflow path, which is suitable for scenarios requiring rapid purification. The air handling unit of this application can switch between two operating modes by selecting different cover plates, so that the air handling unit can adapt to different usage scenarios and meet the diverse needs of users.

[0006] According to some embodiments of this application, the main unit has an installation cavity and an open opening and an air inlet communicating with the installation cavity, and an air handling cavity is disposed in the installation cavity; the main unit is also provided with an exhaust hole communicating with the air handling cavity, an air duct assembly is connected to the main unit, and a first air duct is connected with the air inlet; wherein when the main unit is connected to the first cover plate, the first cover plate covers the air inlet, the first air duct communicates with the air handling cavity and blocks the communication channel between the installation cavity and the air handling cavity, and when the main unit is connected to the second cover plate, the second cover plate seals the open opening and makes the installation cavity and the air handling cavity communicate.

[0007] According to some embodiments of this application, the air handling device further includes: a fan assembly, the air handling chamber includes a purification chamber and a fan chamber, the purification chamber is provided with a purification device, the fan assembly has a fan chamber, and when the fan assembly is running, the airflow enters the fan chamber through the purification chamber and is discharged by the fan assembly through the exhaust hole.

[0008] According to some embodiments of this application, the fan assembly includes: a duct housing disposed inside the main unit and defining a fan cavity inside the duct housing, the fan cavity communicating with an exhaust port; a fan wheel rotatably disposed inside the fan cavity; and a drive component disposed inside the air handling chamber and connected to the fan wheel.

[0009] According to some embodiments of this application, a protruding ridge is formed on the first cover plate, the ridge defines a second air duct, and an air inlet of the second air duct is provided on the front side of the ridge.

[0010] According to some embodiments of this application, an annular wall is formed on the lower surface of the first cover plate, and the annular wall extends to abut against the purification device.

[0011] According to some embodiments of this application, a limiting notch is formed at the edge of the opening, and a first limiting protrusion that mates with the limiting notch is provided on the edge of the first cover plate, and / or a second limiting protrusion that mates with the limiting notch is provided on the edge of the second cover plate.

[0012] According to some embodiments of this application, the purification device further includes: a negative ion generator disposed in the air handling chamber and used to generate negative ions; and / or an ozone generator disposed in the air handling chamber and used to generate ozone.

[0013] According to some embodiments of this application, the air duct assembly is constructed as a ring or a partially broken ring, the air duct assembly is rotatably connected to the main unit, and a strip-shaped slit is formed on the air duct assembly to serve as the air inlet of the air duct.

[0014] According to some embodiments of this application, an air handling device guide plate is disposed on an air duct assembly, with one side edge of the guide plate disposed near the air inlet end of the air duct assembly, and the other side edge of the guide plate extending toward the main unit.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0017] Figure 1 This is a schematic diagram of the structure of an air handling apparatus according to an embodiment of this application;

[0018] Figure 2 This is a schematic diagram of the structure of the air handling apparatus with the first cover plate according to an embodiment of this application;

[0019] Figure 3 This is a schematic diagram of the structure of the air handling apparatus with a second cover plate according to an embodiment of this application;

[0020] Figure 4 This is a schematic diagram of the internal structure of the air handling apparatus with the first cover plate according to an embodiment of this application;

[0021] Figure 5 This is a schematic diagram of the internal structure of the air handling apparatus with the second cover plate according to an embodiment of this application;

[0022] Figure 6 This is a schematic diagram of the internal structure of an air handling apparatus according to an embodiment of this application;

[0023] Figure 7 yes Figure 6 A magnified view of a portion of area A in the center circle;

[0024] Figure 8 This is a rear view of an air handling apparatus according to an embodiment of this application.

[0025] Figure label:

[0026] Air handling unit 1

[0027] Main unit 11, main unit housing 111, exhaust vent 1110, air handling chamber 112, fan chamber 1121, purification chamber 1122, filter screen 1123, limit notch 1101.

[0028] Wind turbine 113, rotor 1131, blades 1132, rotor cover 1133

[0029] Drive component 114,

[0030] Air duct assembly 12, air duct 121, slit 122, air inlet 123, extension section 124, seal 125, lighting component 126, deflector 127.

[0031] Purification device 131,

[0032] First cover plate 14, second air duct 141, annular wall 142, raised portion 143, air inlet 1431, first limiting protrusion 144.

[0033] Second cover plate 15, support foot 151, second limiting protrusion 152. Detailed Implementation

[0034] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0035] The following is for reference. Figures 1-8 An air handling apparatus 1 according to an embodiment of the present invention is described.

[0036] The air handling device 1 according to this application includes: a main unit 11, an air duct assembly 12, a first cover plate 14 and a second cover plate 15. The main unit 11 has an air handling cavity 112 inside. The air duct assembly 12 is connected to the main unit 11 and has a first air duct communicating with the air handling cavity 112 inside. The first cover plate 14 and the second cover plate 15 are selectively connected to the main unit 11. The first cover plate 14 has a second air duct 141. When the first cover plate 14 is connected to the main unit 11, the second air duct 141 communicates with the air handling cavity 112 and blocks the communication between the first air duct and the air handling cavity 112. When the second cover plate 15 is connected to the main unit 11, the first air duct communicates with the air handling cavity 112.

[0037] The main unit 11 is the core of the air handling unit 1, providing the mounting base for various components. The air handling chamber 112 inside the main unit 11 can be a sealed space, whose main function is to accommodate and fix the purification device 131. The purification device 131 can be such as a HEPA filter, activated carbon filter, ultraviolet lamp, etc. At the same time, a fan device can also be arranged in the air handling chamber 112 to provide power for the airflow.

[0038] The air duct assembly 12 is used to connect the host 11 to the external environment. A first air duct is formed inside the air duct assembly 12. A slit 122 can be provided on the air duct assembly 12 to provide higher air pressure, thereby accelerating the airflow speed into the first air duct. It is suitable for scenarios that require rapid air purification, such as indoor smoking, indoor hot pot, and barbecue.

[0039] In some usage scenarios where only air circulation is required, such as in a bathroom, where high airflow speed is not necessary, the second cover plate 15 can be replaced with the first cover plate 14 to activate a second operating mode. After replacing the second cover plate 15 with the first cover plate 14, the second air duct 141 on the first cover plate 14 connects to the air handling chamber 112. The cross-sectional area of ​​the second air duct 141 is larger than that of the first air duct. When the power provided by the air handling device 1 is the same, the air inlet of the second air duct 141 is larger than that of the slit 122, resulting in lower negative pressure, slower airflow speed, and lower airflow resistance. This achieves ventilation while minimizing noise, thus improving the user experience. When the first cover plate 14 is installed on the main unit 11, it blocks the connection between the first air duct in the air duct assembly 12 and the air handling chamber 112, ensuring that airflow can only pass through the second air duct 141.

[0040] When rapid ventilation is required, the first cover plate 14 is replaced with the second cover plate 15. The second cover plate 15 seals the air handling chamber 112. The first air duct is connected to the air handling chamber 112 and provides strong suction through the slit 122 on the air duct assembly 12.

[0041] The air handling device 1 of this application achieves flexible switching between purification modes by setting a first cover plate 14 and a second cover plate 15 that can be selectively connected. The air handling chamber 112 integrated inside the main unit 11 provides a stable main structural platform for air purification and airflow. The first air duct in the air duct assembly 12 can provide a large suction force to the air inlet set on the air duct assembly 12, which is suitable for scenarios requiring rapid purification. The second air duct 141 set on the first cover plate 14 provides a high-flow airflow path, which is suitable for scenarios with low noise and relatively slow air exchange rate. The air handling device 1 of this application can switch between two working modes by selecting to install different covers, so that the air handling device 1 can adapt to different usage scenarios and meet the diverse needs of users.

[0042] According to some embodiments of this application, the main unit 11 has an installation cavity and an open opening and an air inlet 123 communicating with the installation cavity, and an air handling cavity 112 is disposed in the installation cavity; the main unit 11 may include a main unit housing 111, in which an installation cavity is provided, and an exhaust hole 1110 communicating with the air handling cavity 112 is formed on the main unit housing 111.

[0043] The air duct assembly 12 is connected to the main unit housing 111. The first air duct is connected to the air inlet 123. When the main unit 11 is connected to the first cover plate 14, the first cover plate 14 covers the air inlet 123. The first air duct connects to the air handling chamber 112 and blocks the communication channel between the mounting chamber and the air handling chamber 112. When the main unit 11 is connected to the second cover plate 15, the second cover plate 15 seals the open opening and connects the mounting chamber and the air handling chamber 112.

[0044] The air handling device 1 of this application embodiment achieves physical switching between two operating modes through the cooperation of the main unit 11 with the replaceable first cover plate 14 and the second cover plate 15. The main unit 11 has an internal mounting cavity, which is connected to the outside through an open opening; when the first cover plate 14 is installed, the second air duct 141 is connected to the air handling cavity 112. When the second cover plate 15 is installed, the second cover plate 15 seals the open opening and maintains the connection between the first air duct and the air handling cavity 112.

[0045] The air handling chamber 112 is located downstream of the mounting chamber, and an exhaust port 1110 is provided on the main unit housing 111 to discharge purified air. The air duct assembly 12 is connected to the main unit 11, and the first air duct inside the air duct assembly 12 is directly connected to the air inlet 123 of the main unit 11 to form an independent air path. When the first cover plate 14 is installed, the main functions of the first cover plate 14 are: to cover the open opening of the main unit 11, to close the connection between the first air duct and the air handling chamber 112, and to form a connecting channel between the second air duct 141 in the mounting chamber and the air handling chamber 112, thereby ensuring that all airflow must enter the air handling chamber 112 through the second air duct 141 to achieve a high-efficiency purification mode with a large air volume.

[0046] When the second cover plate 15 is replaced, the cover plate effectively seals the open opening, restores the path of the mounting cavity to the first air duct through the air inlet 123, and keeps the mounting cavity and the air handling cavity 112 unobstructed, so that air can enter through the air duct assembly 12 and the first air duct.

[0047] By using two interchangeable cover plates, the air handling unit 1 of this application has two different air intake modes. This allows a single air handling unit 1 to adapt to the purification needs of different scenarios.

[0048] According to some embodiments of this application, the air handling device 1 further includes a fan assembly, the air handling chamber 112 includes a purification chamber 1122 and a fan chamber 1121, the purification chamber 1122 is provided with a purification device 131, the fan assembly has a fan chamber 1121, when the fan assembly is running, the airflow enters the fan chamber 1121 through the purification chamber 1122 and is discharged by the fan assembly through the exhaust port 1110.

[0049] In the embodiments of this application, by dividing the air handling chamber 112 into a purification chamber 1122 and a fan chamber 1121, a process of purifying the air before it enters the fan chamber 1121 is achieved. When the fan assembly operates within the fan chamber 1121, it generates a stable negative pressure, forcing the airflow to first completely pass through the purification chamber 1122, fully contacting the purification device 131 within the purification chamber 1122 to remove contaminants, thus becoming clean air before entering the fan chamber 1121, and finally being discharged through the exhaust port 1110. This ensures that all intake air undergoes forced purification, effectively avoiding airflow short-circuiting and purification dead zones, greatly improving purification efficiency and reliability. Simultaneously, it ensures that the fan always operates in a clean air environment, fundamentally preventing performance degradation, increased noise, and secondary pollution problems caused by contaminant accumulation, significantly extending the service life of the fan assembly, and maintaining long-term stable high-performance output of the device.

[0050] According to some embodiments of this application, the purification device 131 can be configured as a mesh filter 1123 disposed in the purification chamber 1122, or it can be configured as a HEPA filter, activated carbon filter, etc. disposed in the purification chamber 1122.

[0051] According to some embodiments of this application, the fan assembly includes: a duct housing, which is disposed inside the main unit 11 and defines a fan cavity 1121 inside the duct housing, the fan cavity 1121 communicating with an exhaust port 1110; a fan wheel 113, which is rotatably disposed inside the fan cavity 1121; and a drive component 114, which is disposed inside the air handling cavity 112 and connected to the fan wheel 113.

[0052] In this embodiment, the air duct shell is built into the host 11 and defines an independent fan cavity 1121, which not only provides installation space for the impeller 113, but also ensures that the fan cavity 1121 is connected to the exhaust hole 1110. The exhaust hole 1110 can be arranged in the radial direction of the fan cavity 1121. By utilizing the axial air intake and radial air exhaust of the impeller 113, the airflow efficiency can be improved.

[0053] The duct housing also effectively insulates and protects the fan from noise during operation. The impeller 113 is rotatably mounted within this enclosed fan chamber 1121, significantly reducing airflow eddies and power losses, and improving air delivery efficiency. The drive unit 114 is located within the air handling chamber 112 and connected to the impeller 113, preventing interference with airflow and protecting the motor from dust and moisture, thus extending its service life. It also facilitates heat dissipation and maintenance of the drive unit 114. The overall structure is compact, achieving low noise, high reliability, and long lifespan while ensuring excellent ventilation performance.

[0054] According to some embodiments of this application, a protruding ridge 143 is formed on the first cover plate 14. A second air duct 141 is defined within the ridge 143, and an air inlet 1431 of the second air duct 141 is provided on the front side of the ridge 143. In this embodiment, by providing the ridge 143 on the first cover plate 14, the area of ​​the air inlet end of the second air duct 141 is enlarged. The ridge 143 protrudes from the cover plate body, and the second air duct 141 defined within it significantly increases the effective cross-sectional area and length of the air duct by protruding from the first cover plate 14, providing more ample and smooth space for airflow, which is beneficial for reducing wind resistance, reducing airflow noise, and achieving a larger air intake volume. The air inlet 1431 of the second air duct 141 is directly provided on the front side of the ridge 143, making the air intake direction more concentrated, which can more efficiently guide external air into the second air duct 141, reducing air intake turbulence and energy loss.

[0055] According to some embodiments of this application, an annular wall 142 is formed on the lower surface of the first cover plate 14, and the annular wall 142 extends to abut against the purification device 131. The annular wall 142 on the lower surface of the first cover plate 14 forms a channel that fits tightly against the surface of the purification device 131, thereby preventing the connection between the mounting cavity and the purification device 131, thus isolating the airflow of the first air duct, effectively preventing unfiltered air from leaking from the gap between the first cover plate 14 and the purification device 131, ensuring that all intake air is forcibly processed by the purification device 131, thereby guaranteeing the thoroughness and effectiveness of purification.

[0056] Meanwhile, the surrounding structure of the annular wall 142 provides additional positioning and support for the first cover plate 14, enhancing its installation stability and resistance to deformation, and reducing vibrations or abnormal noises that may occur during equipment operation. In addition, this sealing design also prevents the accumulation of dust and impurities at the edge of the purification device 131, facilitating daily cleaning and maintenance, and improving the overall reliability, durability, and user experience of the air handling unit 1.

[0057] According to some embodiments of this application, a support foot 151 is formed at the bottom of the second cover plate 15, and the support foot 151 is supported on the air inlet side of the purification device 131. The second cover plate 15 extends downward through the bottom support foot 151 and is directly supported on the air inlet side of the purification device 131. This not only provides stable mechanical support for the second cover plate 15 itself, preventing it from deforming or shifting due to external forces or its own weight, but also effectively avoids the second cover plate 15 bending or collapsing when impacted by airflow. The rigid support structure of the support foot 151 maintains the flatness of the purification components such as the air inlet side filter, ensuring that the intake air passes evenly through the entire filtration surface area.

[0058] According to some embodiments of this application, a limiting notch 1101 is formed at the edge of the opening, and a first limiting protrusion 144 that mates with the limiting notch 1101 is provided at the edge of the first cover plate 14, and / or a second limiting protrusion 152 that mates with the limiting notch 1101 is provided at the edge of the second cover plate 15. The first limiting protrusion 144 that mates with the limiting notch 1101 is provided at the edge of the first cover plate 14, and the second limiting protrusion 152 that mates with the limiting notch 1101 is provided at the edge of the second cover plate 15. The top of the main unit 11 has an opening to facilitate the installation, maintenance, and cleaning of internal modules, while also providing a direct inlet and outlet channel for airflow. The limiting notch 1101 forms at the edge of the opening, providing a positioning reference for the first cover plate 14 and the second cover plate 15. The limiting notch 1101 can be used to restrict the horizontal movement of the first cover plate 14, ensuring the accuracy of the installation position of the first cover plate 14. In addition, the limiting notch 1101 also has a foolproof effect, preventing the installation direction of the first cover plate 14 from being mismatched with the host 11.

[0059] In the technical solution of this application, a wind turbine 113 is provided inside the fan cavity 1121. The wind turbine 113 consists of three components: a disc 1131, blades 1132, and a cover 1133. The disc 1131 is fixed to the bottom of the fan cavity as a basic load-bearing component. The center of the disc 1131 is directly connected to the drive component 114 to realize power transmission. Multiple blades 1132 are arranged radially and evenly along the outer periphery of the disc 1131. Each blade 1132 is inclined in a direction away from the center of the circle, so that after the disc 1131 rotates, it drives the airflow to flow out radially, realizing axial air intake and radial air exhaust. The cover 1133 adopts a ring structure to cover the top of the blades 1132, connecting multiple blades 1132 into a whole.

[0060] The bottom positioning design of the impeller 1131 lowers the center of gravity of the impeller 113, improving operational stability; the evenly distributed multi-blade 1132 ensures the smoothness and consistency of airflow output; the top cover 1133 not only enhances the structural strength of the blades 1132 but also forms a complete airflow guiding surface. The blades 1132 generate directional airflow, and the cover 1133 strengthens the structure and optimizes the flow field, enabling the impeller 113 to maintain both aerodynamic performance and good mechanical stability at high speeds, providing a reliable airflow power source for the air handling unit 1.

[0061] According to some embodiments of this application, the purification device 131 includes: a negative ion generator disposed in the airflow treatment chamber 110 and used to generate negative ions; and / or an ozone generator disposed in the airflow treatment chamber 110 and used to generate ozone.

[0062] In the technical solution of this application, the purification device 131 adopts active air purification technology and integrates at least one purification module in the airflow processing chamber 110. The negative ion generator generates a large number of negative ions through the high voltage discharge principle. These charged particles can effectively adsorb particulate pollutants in the air. The ozone generator uses ultraviolet light of a specific wavelength or corona discharge to generate ozone molecules, which oxidize and decompose organic pollutants and microorganisms.

[0063] According to some embodiments of this application, mating holes 1111 for connecting the air duct assembly 12 are formed on the two side walls of the main housing 111 facing each other. The mating holes 1111 are used to connect the air outlet 123 of the air duct 121. The air duct assembly 12 has extension sections 124 extending into the air inlet 123 at both ends of the disconnection point. A sealing element 125 is provided between the outer periphery of the extension section 124 and the inner wall of the air inlet 123.

[0064] According to the technical solution of this application, the main housing 111 adopts a symmetrical connection structure, and dedicated air inlets 123 are respectively provided on two opposite side walls of the main housing 111 for docking with the air duct assembly 12. The size and shape of the air inlets 123 match the air outlets 123 of the air duct 121 to ensure the airflow channel is sealed. The extension sections 124 provided at both ends of the air duct assembly 12 adopt an insertion structure and can be embedded into the air inlets 123 of the main housing 111 to form a stable mechanical connection. The annular seal 125 provided between the extension section 124 and the air inlet 123 is made of elastic material, which ensures airtightness while allowing for certain installation tolerances.

[0065] In some embodiments of this application, an illumination element 126 is provided on the air duct assembly 12. The illumination element 126 is integrated and installed on the annular outer wall of the air duct assembly 12. It can use an LED light source and be equipped with a light-diffusing plate to achieve a uniform lighting effect. In the embodiments of this application, the illumination element 126 provides functional lighting without affecting airflow.

[0066] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and 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. Therefore, they should not be construed as limitations on this invention.

[0067] In the description of this invention, "first feature" and "second feature" may include one or more of the features.

[0068] In the description of this invention, "a plurality of" means two or more.

[0069] In the description of this invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0070] In the description of this invention, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0071] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0072] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An air handling device, characterized in that, include: The host unit has an air handling chamber inside; A duct assembly, the duct assembly being connected to the main unit, the duct assembly having a first duct communicating with the air handling chamber; A first cover plate and a second cover plate, which are selectively connected to the main unit, wherein the first cover plate is provided with a second air duct; in When the first cover plate is connected to the host, the second air duct is connected to the air handling chamber and blocks the connection between the first air duct and the air handling chamber. When the second cover plate is connected to the host, the first air duct is connected to the air handling chamber.

2. The air handling apparatus according to claim 1, characterized in that, The main unit has a mounting cavity and an open opening and an air inlet communicating with the mounting cavity, and the air handling cavity is located inside the mounting cavity; The main unit is also provided with an exhaust port that communicates with the air handling chamber, the air duct assembly is connected to the main unit, and the first air duct communicates with the air inlet; in When the main unit is connected to the first cover plate, the first cover plate covers the air inlet, and the first air duct connects to the air handling chamber and blocks the communication channel between the mounting chamber and the air handling chamber. When the main unit is connected to the second cover plate, the second cover plate seals the open opening and connects the mounting chamber to the air handling chamber.

3. The air handling apparatus according to claim 2, characterized in that, Also includes: The fan assembly includes an air handling chamber comprising a purification chamber and a fan chamber. The purification chamber is equipped with a purification device. The fan assembly has the fan chamber. When the fan assembly is in operation, airflow enters the fan chamber through the purification chamber and is discharged by the fan assembly through the exhaust port.

4. The air handling apparatus according to claim 3, characterized in that, The wind turbine assembly includes: A duct housing is disposed inside the main unit and defines the fan cavity inside the duct housing, and the fan cavity is connected to the exhaust port; A wind turbine, which is rotatably disposed within the fan cavity; A drive component is disposed within the air handling chamber and connected to the impeller.

5. The air handling apparatus according to claim 1, characterized in that, The first cover plate has a protruding ridge, which defines the second air duct and has an air inlet for the second air duct located on the front side of the ridge.

6. The air handling apparatus according to claim 3, characterized in that, An annular wall is formed on the lower surface of the first cover plate, and the annular wall extends to abut against the purification device.

7. The air handling apparatus according to claim 2, characterized in that, The edge of the opening forms a limiting notch, and the edge of the first cover plate is provided with a first limiting protrusion that cooperates with the limiting notch, and / or; the edge of the second cover plate is provided with a second limiting protrusion that cooperates with the limiting notch.

8. The air handling apparatus according to claim 3, characterized in that, The purification device also includes: A negative ion generator, wherein the negative ion generator is disposed in an air handling chamber and is used to generate negative ions; and / or An ozone generator is disposed in the air handling chamber and is used to generate ozone.

9. The air handling apparatus according to any one of claims 1-8, characterized in that, The air duct assembly is constructed as a ring or a partially broken ring. The air duct assembly is rotatably connected to the main unit. A strip-shaped slit is formed on the air duct assembly to serve as the air inlet of the air duct.

10. The air handling apparatus according to claim 9, characterized in that, Also includes: A deflector is provided on the air duct assembly, with one edge of the deflector located near the air inlet end of the air duct assembly and the other edge of the deflector extending toward the main unit.

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