Air conditioner

Abstract

The utility model discloses an air conditioner. The air conditioner comprises a filtering assembly; the air pipe connecting piece is provided with a ventilation opening; the air return box body is provided with a cavity and an air return port communicated with the cavity, and the air return box body is detachably connected with the filtering assembly and / or the air pipe connecting piece; when the air return box body is connected with the air pipe connecting piece, the ventilation opening is communicated with the air return opening.

Description

Technical Field

[0001] The present application belongs to the field of electrical appliance technology, and specifically relates to an air conditioner. Background Art

[0002] Air conditioners are household appliances commonly used in people's daily lives. Among them, air conditioners usually include an indoor unit and an outdoor unit, wherein the indoor unit is installed indoors and the outdoor unit is installed outdoors.

[0003] In order to achieve return air, a return air duct is installed on the air conditioner, and in order to achieve filtering, a filter assembly is installed on the air conditioner. However, in the prior art, the return air duct and the filter assembly cannot be compatible on the air conditioner, which affects the user experience. Utility Model Content

[0004] In order to solve the above technical problems, the present invention provides an air conditioner, which aims to at least solve to a certain extent the technical problem that the return air duct and the filter assembly cannot be compatible on the air conditioner, affecting the user experience.

[0005] The technical solution of the utility model is:

[0006] An air conditioner is special in that it includes: a filter assembly; an air duct connector with a vent; a return air box body, having a chamber and a return air outlet connected to the chamber, and detachably connected to the filter assembly and / or the air duct connector; wherein, when the return air box body is connected to the air duct connector, the vent is connected to the return air outlet.

[0007] Since the duct connector is provided with a vent, and the return air box has a chamber and a return air port connected to the chamber, and can be detachably connected to the filter assembly and / or the duct connector, when the return air box is connected to the duct connector, the vent is connected to the return air port. Therefore, when the duct is to be used, the duct connector can be connected to the return air box, and then the duct is connected to the duct connector, and the vent is connected to the return air port. The air can enter the chamber through the duct, the vent and the return air port in sequence to realize the return air of the air conditioner. When the return air needs to be filtered, the filter assembly and / or the duct connector are connected. The filter assembly is connected to the return air box body, and the wind can enter the chamber through the filter assembly and the return air port in turn to filter the return air. When the air in the chamber input by the air duct needs to be filtered, the air duct connector and the filter assembly can be connected to the return air box body, and then the air duct is connected to the air duct connector, and the vent is connected to the return air port. The wind can enter the chamber through the air duct, the vent, the filter assembly and the return air port in turn, thereby filtering the air in the chamber input by the air duct, achieving compatibility between the return air duct and the filter assembly, and improving the user experience.

[0008] In some embodiments, the return air box has a folded edge, which is located at the edge of the return air outlet; the folded edge can be detachably connected to the filter assembly and / or the air duct connector to ensure the structural strength of the connection between the return air box and the filter assembly and the air duct connector.

[0009] In some embodiments, the air conditioner further includes a fan assembly disposed in the chamber. When the return air box is connected to the filter assembly and the air duct connector, the filter assembly is located between the air duct connector and the fan assembly to ensure that the filter assembly can filter the air.

[0010] In some embodiments, the filter assembly includes: a support frame detachably connected to the return air box; and a filter element detachably connected to the support frame to facilitate inspection or maintenance of the filter assembly.

[0011] In some embodiments, the support frame includes: a connecting member, which is detachably connected to the return air box body; a main body, which is connected to the filter element and to the connecting member; wherein the connecting member is arranged outside the main body to ensure the stability of the connection between the support frame and the return air box body.

[0012] In some embodiments, the support frame is provided with a mounting groove, and the filter element can be embedded in the mounting groove to facilitate installation of the filter element.

[0013] In some embodiments, the filter assembly further includes: a limiting member connected to the support frame and located on one side of the mounting groove; a fixing member connected to the support frame and located on two opposite sides of the filter element to the limiting member to ensure the structural strength of the support frame.

[0014] In some embodiments, the filter assembly further includes: a reinforcement member disposed in the support frame and connected to the filter element to ensure the stability of the filter element installation.

[0015] In some embodiments, the air duct connector includes: a support member, which is detachably connected to the return air box body, and the vent is opened on the support member; a connecting pipe, which is connected to the support member and communicates with the vent to ensure that the air duct can transport air to the chamber.

[0016] In some embodiments, the air conditioner further includes an air duct, and the connecting pipe is provided with a clamp, which is located outside the connecting pipe; wherein the air duct is sleeved on the connecting pipe and clamped with the clamp to facilitate the connection between the air duct and the connecting pipe 203. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0018] Figure 1 is an exploded schematic diagram of an air conditioner according to some embodiments;

[0019] Figure 2 for Figure 1 Schematic diagram of the structure of the return air box of the air conditioner;

[0020] Figure 3 for Figure 1 A schematic diagram of the structure of the air duct connector of the air conditioner;

[0021] Figure 4 for Figure 1 A schematic diagram of the structure of the filter assembly of the air conditioner;

[0022] Figure 5 for Figure 4 Schematic diagram of the structure of the support frame of the filter assembly.

[0023] In the attached figure:

[0024] Filter assembly 10, support frame 101, connector 1011, body 1012, mounting slot 1013, filter element 102, stopper 103, fixing element 104, reinforcement element 105;

[0025] Duct connector 20, vent 201, support 202, connecting pipe 203, clamp 204;

[0026] Return air box 30, return air outlet 301, folded edge 302;

[0027] Fan assembly 40. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] It should be noted that all directional indications in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0030] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0031] In addition, in this utility model, the descriptions of "first" and "second" are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0032] The present application is described below with reference to specific embodiments and with reference to the accompanying drawings:

[0033] The air conditioner provided in this embodiment is intended to at least to some extent resolve the technical problem of being unable to achieve compatibility between the return air duct and the filter assembly on the air conditioner, which affects the user experience.

[0034] Figure 1 Schematic diagram of the explosion of the air conditioner in some embodiments. Figure 1 The air conditioner of the embodiment of the present application includes: a filter assembly 10, an air duct connector 20, and a return air box 30. The air duct connector 20 is provided with a vent 201. The return air box 30 has a chamber and a return air port 301 communicating with the chamber, and is detachably connected to the filter assembly 10 and / or the air duct connector 20. When the return air box 30 is connected to the air duct connector 20, the vent 201 is communicated with the return air port 301.

[0035] The filter assembly 10 may be located in the return air inlet 301 .

[0036] Since the duct connector 20 is provided with a vent 201, and the return air box 30 has a chamber and a return air port 301 communicating with the chamber, and can be detachably connected to the filter assembly 10 and / or the duct connector 20, when the return air box 30 is connected to the duct connector 20, the vent 201 is communicated with the return air port 301. Therefore, when the duct is to be used, the duct connector 20 can be connected to the return air box 30, and then the duct can be connected to the duct connector 20, and the vent 201 is communicated with the return air port 301. The air can enter the chamber through the duct, the vent 201 and the return air port 301 in sequence to realize the return air of the air conditioner. When the return air is to be filtered When the filter assembly 10 is connected to the return air box body 30, the wind can enter the chamber through the filter assembly 10 and the return air port 301 in turn to filter the return air. When the air in the air duct input chamber needs to be filtered, the air duct connector 20 and the filter assembly 10 can be connected to the return air box body 30, and then the air duct is connected to the air duct connector 20, and the vent 201 is connected to the return air port 301. The wind can enter the chamber through the air duct, the vent 201, the filter assembly 10 and the return air port 301 in turn, thereby filtering the air in the air duct input chamber, achieving compatibility between the return air duct and the filter assembly 10, and improving the user experience.

[0037] Combine Figure 1 In some embodiments, in order to allow the return air to pass through the filter assembly 10, when the return air box 30 is connected to the filter assembly 10, along the return air direction, the projection of the filter assembly 10 on the return air box 30 at least partially overlaps with the projection of the return air outlet 301 on the return air box 30, ensuring that all return air entering the return air box 30 must first be filtered by the filter assembly 10, so that pollutants such as dust and impurities in the air are effectively intercepted before entering the indoor circulation, thereby significantly improving the purification efficiency of the indoor air.

[0038] Combine Figure 1 In some embodiments, in order to allow the return air to enter the return air outlet 301 through the vent 201, when the return air box 30 is connected to the air duct connector 20, along the return air direction, the projection of the air duct connector 20 on the return air box 30 at least partially overlaps with the projection of the return air outlet 301 on the return air box 30, and the vent 201 is connected to the accommodating cavity, ensuring that the return air entering from the vent 201 can directly and smoothly enter the return air outlet 301 without being blocked or changed in direction by other structures, thereby improving the ventilation efficiency.

[0039] Figure 2 for Figure 1 The schematic diagram of the structure of the return air box of the air conditioner. Figure 1 and Figure 2In some embodiments, in order to ensure the structural strength of the connection between the return air box 30 and the filter assembly 10 and the air duct connector 20, the return air box 30 has a folded edge 302, which is located at the edge of the return air outlet 301. The folded edge 302 is detachably connected to the filter assembly 10 and / or the air duct connector 20. The folded edge 302 is arranged around the return air outlet 301 to form a sturdy frame, which can improve the overall rigidity of the return air box 30 and make it more resistant to external loads and deformation. When subjected to external forces such as pressure, bending or torsion, the return air box 30 can maintain good shape stability, thereby ensuring the stability of the connection between the return air box 30 and the filter assembly 10 and the air duct connector 20. Furthermore, when the return air box 30 is subjected to external forces, stress will be concentrated near the stress points. The multiple folded edges 302 can disperse this stress over a larger area, thereby reducing the degree of local stress concentration. This can reduce the risk of damage and failure caused by stress concentration, improve the load-bearing capacity and durability of the return air box 30, and further ensure the stability of the connection between the return air box 30, the filter assembly 10, and the air duct connector 20. The folded edges 302 are integrally formed with the return air box 30.

[0040] In some embodiments, since the folded edge 302 can be detachably connected to the filter assembly 10 and / or the air duct connector 20, that is, the folded edge 302 can be connected only to the filter assembly 10, or only to the air duct connector 20, or to both the filter assembly 10 and the air duct connector 20, the versatility of the folded edge 302 is improved, so that the same folded edge 302 can adapt to different installation objects, reducing the demand for the number of connectors and reducing costs.

[0041] Combine Figure 1 and Figure 2 In some embodiments, in order to ensure that the filter assembly 10 can filter the air, the air conditioner also includes a fan assembly 40 arranged in the chamber. When the return air box 30 is connected to the filter assembly 10 and the air duct connector 20, the filter assembly 10 is located between the air duct connector 20 and the fan assembly 40. The air returning from the outside or the room must first pass through the filter assembly 10 before circulating through the fan assembly 40. Pollutants such as dust, pollen, and bacteria in the air are effectively intercepted on the filter assembly 10, thereby improving the air purification efficiency and ensuring the freshness and cleanliness of the indoor air. At the same time, the filter assembly 10 can block the pollutants outside and prevent the pollutants from entering the fan assembly 40, protecting the fan assembly 40 from erosion by pollutants, ensuring the safety of the fan assembly 40, and extending the service life of the fan assembly 40.

[0042] Figure 4 for Figure 1 A schematic diagram of the structure of the filter assembly of the air conditioner; Figure 5 for Figure 4Schematic diagram of the structure of the support frame of the filter assembly. Figure 4 and Figure 5 In some embodiments, to facilitate inspection or maintenance of the filter assembly 10, the filter assembly 10 includes a support frame 101 and a filter element 102. The support frame 101 is detachably connected to the return air box 30. The filter element 102 is detachably connected to the support frame 101.

[0043] In some embodiments, since the support frame 101 is detachably connected to the return air housing 30, when the air duct needs to be installed and the filter assembly 10 is not needed, the support member 101 can be removed from the return air housing 30 to free up the necessary space or adjust the position for the installation of the air duct connector 20, thereby simplifying the installation process and improving work efficiency. Moreover, when the air conditioner requires regular maintenance or cleaning, the support member 101 can be removed from the return air housing 30, making it easier to inspect or replace components within the return air housing 30 without having to worry about being blocked by the filter assembly 10. The area requiring maintenance can be directly accessed, reducing maintenance difficulty and cost.

[0044] In some embodiments, due to the detachable design between the filter element 102 and the support frame 101, when the filter element 102 needs to be replaced or cleaned, the filter element 102 can be removed from the support frame 101 without disassembling the entire filter assembly 10 or the return air box 30, which simplifies the maintenance process, improves maintenance efficiency, and realizes the independent replaceability of the filter element 102. Therefore, when the filtering effect decreases, only the filter element 102 needs to be replaced without replacing the entire filter assembly 10 or the return air box 30, which reduces maintenance costs and extends the service life of other components.

[0045] Combine Figure 4 and Figure 5 In some embodiments, in order to ensure the stability of the connection between the support frame 101 and the return air box 30, the support frame 101 includes: a connector 1011 and a body 1012. The connector 1011 is detachably connected to the return air box 30. The body 1012 is connected to the filter element 102 and to the connector 1011. The connector 1011 provides support and fixing points for the body 1012, so that the body 1012 can be more firmly fixed to the return air box 30 when subjected to external forces such as the filter element 102 and possible wind pressure, thereby reducing the risk of loosening or falling off due to vibration or external forces.

[0046] In some embodiments, the connector 1011 is arranged outside the main body 1012, which can prevent the connector 1011 from occupying the space inside the main body 1012, thereby ensuring the installation area of the filter element 102, and then ensuring the filtering area of the filter element 102, so that the filter element 102 can fully filter the air entering the chamber. Moreover, the connector 1011 will not block the air entering the chamber, thereby ensuring the air intake volume.

[0047] Combine Figure 5 At the same time, the close fit between the mounting groove 1013 and the filter element 102 helps to form a good sealing effect, preventing unfiltered air from directly entering the chamber through the gap, thereby optimizing the sealing performance.

[0048] Combine Figure 4 and Figure 5 In some embodiments, to ensure the stability of the installation of the filter element 102, the filter assembly 10 further includes a stopper 103 and a fixing member 104. The stopper 103 is connected to the support frame 101 and is located on one side of the mounting groove 1013. The fixing member 104 is connected to the support frame 101 and is located on opposite sides of the filter element 102 from the stopper 103. The number of stoppers 103 can be multiple, and the multiple stoppers 103 are arranged in parallel and spaced apart along the length of the filter element 102. The mounting groove 1013 can be L-shaped.

[0049] In some embodiments, when the filter element 102 is to be installed, the filter element 102 can be inserted between the limiting member 103 and the groove wall of the installation groove 1013, providing a physical limiting effect for the filter element 102 during the installation process, preventing the filter element 102 from moving laterally or tilting during installation, ensuring its precise positioning at the predetermined position, and then, pushing the side of the filter element 102 opposite to the limiting member 103 so that the fixing member 104 can be connected to the support frame 101, forming a clamping effect on the opposite sides of the filter element 102 with the limiting member 103, realizing a double fixing mechanism, enhancing the stability of the filter element 102 after installation, and reducing the risk of loosening or falling off due to vibration or external force.

[0050] In some embodiments, the fixing member 104 can be a magnet, or can be a bolt, a screw or a connecting pin. When the fixing member 104 is a bolt, a screw or a connecting pin, the fixing member 104 can be inserted through the support frame 101 and the return air box 30 to connect.

[0051] Combine Figure 4 and Figure 5 In some embodiments, to ensure the structural strength of the support frame 101, the filter assembly 10 further includes a reinforcement member 105. The reinforcement member 105 is disposed within the support frame 101 and connected to the filter element 102. As a reinforcing structure within the support frame 101, the reinforcement member 105 can effectively disperse and bear the load from the filter element 102 and the external environment, thereby improving the overall structural strength of the support frame 101, making it more resistant to adverse conditions such as deformation and breakage, thereby ensuring the stability and durability of the filter assembly 10.

[0052] In some embodiments, reinforcement member 105 is connected not only to support frame 101 but also to filter element 102, creating a dual connection mechanism that enhances support for filter element 102 and further improves the stability of filter element 102 during installation and use. This stable support structure helps maintain the original shape and size of filter element 102, preventing deformation that could reduce filtration area or reduce filtration accuracy, thereby ensuring the filtration efficiency and performance of filter assembly 10.

[0053] Figure 3 for Figure 1 Schematic diagram of the structure of the air duct connector of the air conditioner. Figure 3 In some embodiments, to ensure that the air duct can deliver air to the chamber, the air duct connector 20 includes a support member 202 and a connecting pipe 203. The support member 202 is detachably connected to the return air box 30, and the vent 201 is defined in the support member 202. The connecting pipe 203 is connected to the support member 202 and communicates with the vent 201.

[0054] In some embodiments, when an air duct is to be used, the support member 202 can be connected to the return air box 30, and then the air duct can be connected to the connecting pipe 203, and the vent 201 can be connected to the connecting pipe 203 and the return air vent 301. The wind can enter the chamber through the air duct, the connecting pipe 203, the vent 201 and the return air vent 301 in turn to realize the return air of the air conditioner.

[0055] In some embodiments, due to the detachable design between the support member 202 and the return air box body 30, the installation, disassembly and maintenance of the air duct connector 20 become convenient. The air duct connector 20 can be operated separately without moving or disassembling the entire return air box body 30, thereby improving work efficiency and flexibility.

[0056] Combine Figure 3 In some embodiments, in order to facilitate the connection between the air duct and the connecting pipe 203, the air conditioner further includes an air duct, and the connecting pipe 203 is provided with a clamping member 204, which is located outside the connecting pipe 203. The air duct is sleeved on the connecting pipe 203 and clamped with the clamping member 204.

[0057] In some embodiments, when the air duct is to be connected to the connecting pipe 203, the air duct is put on the connecting pipe 203 and clamped with the clamp 204, so that the air duct can be easily and quickly put on the connecting pipe 203, and a stable connection is achieved by clamping with the clamp 204, which simplifies the installation process and reduces installation time and labor costs.

[0058] In some embodiments, the clamping member 204 serves as a connecting medium between the connecting tube 203 and the air duct. Its clamping structure ensures the stability of the air duct on the connecting tube 203. Even if vibration or airflow impact occurs during the operation of the air conditioner, the air duct can maintain a tight connection with the connecting tube 203, avoiding air leakage or poor airflow caused by a loose connection, and ensuring that wind can smoothly enter the chamber through the air duct, connecting tube 203, vent 201, and return air port 301 in sequence. Moreover, when the air duct or connecting tube 203 needs maintenance or replacement, maintenance personnel can easily separate the clamping member 204 from the air duct, remove the air duct from the connecting tube 203, perform maintenance or replacement operations, and then reconnect it, making maintenance and replacement easier.

[0059] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0060] In addition, the descriptions of "first", "second", etc. in this application are for descriptive purposes only and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0061] In the description of the present utility model, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0062] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification.

[0063] Although the preferred embodiments of the present application have been described, those skilled in the art may make additional changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present application.

[0064] Obviously, those skilled in the art may make various changes and modifications to this application without departing from the spirit and scope of this application. Thus, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application is intended to include these modifications and variations.

Claims

1. An air conditioner, characterized in that: include: Filter components; The air duct connector is provided with a vent; a return air box having a chamber and a return air port communicating with the chamber, and detachably connected to the filter assembly and / or the air duct connector; Wherein, when the return air box is connected to the air duct connector, the ventilation port is communicated with the return air port.

2. The air conditioner according to claim 1, characterized in that The return air box body has a folded edge, and the folded edge is located at the edge of the return air outlet; The folded edge is detachably connected to the filter assembly and / or the air duct connector.

3. The air conditioner according to claim 1, characterized in that The air conditioner further comprises a fan assembly disposed in the chamber. When the return air box is connected to the filter assembly and the air duct connector, the filter assembly is located between the air duct connector and the fan assembly.

4. The air conditioner according to any one of claims 1 to 3, characterized in that: The filter assembly comprises: A support frame detachably connected to the return air box body; The filter element is detachably connected to the support frame.

5. The air conditioner according to claim 4, characterized in that The support frame comprises: A connecting piece, detachably connected to the return air box body; a body connected to the filter element and to the connecting element; Wherein, the connecting piece is arranged outside the main body.

6. The air conditioner according to claim 4, characterized in that The support frame is provided with a mounting groove, and the filter element can be embedded in the mounting groove.

7. The air conditioner according to claim 6, characterized in that The filter assembly further comprises: a limiting member connected to the support frame and located on one side of the mounting groove; The fixing member is connected to the supporting frame and is located on two opposite sides of the filter element with the limiting member.

8. The air conditioner according to claim 4, characterized in that The filter assembly further comprises: The reinforcement member is arranged in the support frame and connected to the filter member.

9. The air conditioner according to any one of claims 1 to 3, characterized in that: The air duct connector includes: A support member detachably connected to the return air box body, wherein the vent is provided on the support member; A connecting pipe is connected to the supporting member and communicated with the vent.

10. The air conditioner according to claim 9, characterized in that The air conditioner further comprises an air duct, the connecting duct is provided with a clamp, and the clamp is located outside the connecting duct; Wherein, the air duct is sleeved on the connecting pipe and is clamped with the clamp.

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