Volute, fan and duct type air conditioner

Abstract

The utility model relates to the technical field of air conditioners, and discloses a volute, a fan and a duct type air conditioner. The volute comprises a volute body and a movable air pipe. The volute body is provided with an air outlet. The movable air pipe is mounted on the volute main body; the movable air pipe is provided with an air duct communicated with an air outlet, and the pipe wall of the movable air pipe is used for being close to or away from the central axis of the air outlet so as to adjust the cross section and the air outlet direction of the air duct. According to the volute, the size of the cross section of the air duct can be flexibly adjusted by adjusting the pipe wall of the movable air pipe to be close to or away from the central axis of the air outlet, and when the air outlet of the volute body faces an evaporator, the pipe wall of the movable air pipe can be adjusted according to the size of the evaporator; the air outlet end of the air channel can evenly blow air to the whole evaporator, and the problem that an existing fan cannot evenly blow air to the whole evaporator is solved.

Description

Technical Field

[0001] This utility model relates to the field of air conditioner technology, and in particular to a volute, a centrifugal fan, and a duct air conditioner. Background Technology

[0002] A ducted air conditioner includes a fan and an evaporator; the fan includes an impeller and a volute; the volute's outlet faces the evaporator to blow air onto it. Currently, the volute's outlet is either a straight outlet, such as... Figure 1 and Figure 2 As shown. It's either a funnel-shaped air outlet, such as... Figure 3 As shown, high-speed air passing through the straight-outlet volute quickly passes through the evaporator and is blown out, causing uneven airflow across parts of the evaporator and wasting some evaporator area. While the flared-outlet volute can alleviate the uneven airflow in the middle of the evaporator to some extent, it results in some wasted airflow at both ends of the outlet and is prone to generating turbulent noise. Therefore, how to ensure that the fan blows air evenly across the entire evaporator is a problem that the industry urgently needs to solve. Utility Model Content

[0003] This invention provides a volute, a fan, and a duct fan to solve the problem in the prior art that the fan cannot blow air evenly to the entire evaporator.

[0004] The first aspect of this utility model provides a volute, comprising:

[0005] The main body of the volute has an air outlet;

[0006] A movable air duct is installed on the volute body; the movable air duct has an air channel that is connected to the air outlet; the wall of the movable air duct is used to move closer to or further away from the central axis of the air outlet to adjust the cross-section of the air channel and the air outlet direction.

[0007] According to the volute provided by this utility model, the movable air duct includes:

[0008] Multiple first connectors are arranged at circumferential intervals along the air outlet and are connected to the volute body.

[0009] Multiple adjustable components are provided, each being the wall of the movable air duct; the adjustable components are arranged between two adjacent first connecting components, and the multiple adjustable components and the multiple first connecting components enclose the air duct to form the air duct; the adjustable components are hinged to the first connecting components via hinge shafts to adjust the cross-section and air outlet direction of the air duct; the central axis of the hinge shaft intersects the central axis of the air outlet.

[0010] The volute provided by this utility model also includes:

[0011] The second connector has one end of the first connector near the air outlet that is hinged to the movable adjusting member via the hinge shaft, and the other end of the first connector away from the air outlet that is connected to the movable adjusting member via the second connector.

[0012] According to the volute provided by this utility model, the second connecting member includes:

[0013] The long axis of the waist-shaped hole extends around the central axis of the hinge shaft; the first connector has a waist-shaped hole at the end away from the air outlet;

[0014] The first fastener is installed in the waist-shaped hole and is threadedly engaged with the movable adjusting member.

[0015] According to the volute provided by this utility model, the second connecting member includes:

[0016] Multiple mounting holes are arranged at intervals around the central axis of the hinge shaft; the mounting holes are opened at the end of the first connector away from the air outlet;

[0017] The second fastener is installed in the mounting hole and is threaded into the movable adjusting member.

[0018] According to the volute provided by this utility model, the first connecting member includes:

[0019] The base is connected to the main body of the volute.

[0020] A connecting plate, one end of which is formed on the base and the other end extends along the central axis of the air outlet; the connecting plate and the movable adjusting member are hinged together by the hinge shaft.

[0021] According to the volute provided by this utility model, the connecting plate includes:

[0022] Two fixed plates are arranged crosswise and are respectively hinged to the two movable adjusting members;

[0023] An arc-shaped plate, the two fixed plates are connected by the arc-shaped plate.

[0024] According to the volute provided by this utility model, the cross-section of the air outlet is rectangular, and the first connector is installed at the corner of the rectangle.

[0025] The second aspect of this utility model provides a fan, including an impeller and a volute as described in any one of the above claims; the impeller is installed in the mounting cavity of the volute.

[0026] The third aspect of this utility model provides a duct air conditioner, including the volute housing described in any one of the above claims, or the fan described in the above claims.

[0027] The volute provided by this invention allows for flexible adjustment of the cross-sectional size of the air duct by adjusting the wall of the movable air duct to be closer to or further away from the central axis of the air outlet. This design helps optimize airflow, making the airflow within the duct more uniform and smooth, reducing eddies and turbulence, thereby improving air delivery efficiency. When the air outlet of the volute body faces the evaporator, the wall of the movable air duct can be adjusted according to the size of the evaporator, so that the air outlet end of the duct can blow air evenly to the entire evaporator, thus solving the problem of existing fans being unable to blow air evenly to the entire evaporator. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is one of the structural diagrams of existing ducted air conditioners. The arrows in the diagram represent the direction of airflow.

[0030] Figure 2 This is the second structural diagram of an existing ducted air conditioner. The arrows in the diagram represent the air outlet direction.

[0031] Figure 3 This is the third structural diagram of an existing ducted air conditioner. The arrows in the diagram represent the air outlet direction.

[0032] Figure 4 This is one of the structural schematic diagrams of the volute provided by this utility model.

[0033] Figure 5 This is the second schematic diagram of the volute structure provided by this utility model.

[0034] Figure 6 This is a structural schematic diagram of the first connecting member of the volute provided by this utility model.

[0035] Figure 7 This is a schematic diagram of the structure of the movable adjustment component of the volute provided by this utility model.

[0036] Figure 8 This is one of the structural schematic diagrams of the ducted air conditioner provided by this utility model. The arrows in the diagram represent the air outlet direction.

[0037] Figure 9 This is the second structural schematic diagram of the ducted air conditioner provided by this utility model. The arrows in the diagram represent the air outlet direction.

[0038] Figure label:

[0039] 100. Volute housing; 110. Volute housing body; 111. Air outlet duct; 112. Mounting cavity; 120. Movable air duct; 121. First connecting piece; 122. Movable adjusting piece; 123. Hinge shaft; 124. Second connecting piece; 125. Air duct; 1211. Base; 1212. Connecting plate; 1213. Fixing plate; 1214. Arc-shaped plate; 1241. Waist-shaped hole; 1242. First fastener;

[0040] 200. Impeller;

[0041] 300. Evaporator. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0043] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the embodiments of this utility model and simplifying the description. They 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 embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" or "linked" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model based on the specific circumstances.

[0045] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0046] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0047] The following is combined with Figures 4 to 9 The structure and working principle of the volute, fan and duct air conditioner provided by this utility model are described in detail.

[0048] like Figures 4 to 7 As shown, a specific embodiment of the first aspect of this utility model provides a volute 100. The volute 100 includes a volute body 110 and a movable air duct 120; the volute body 110 has an air outlet; the movable air duct 120 is installed on the volute body 110; the movable air duct 120 has an air channel 125, which is connected to the air outlet, and the wall of the movable air duct 120 is used to move closer to or further away from the central axis of the air outlet to adjust the cross-section of the air channel 125 and the air outlet direction.

[0049] In this embodiment, the cross-sectional size of the air duct 125 can be flexibly adjusted by moving the wall of the movable air duct 120 closer to or further away from the central axis of the air outlet. This design helps optimize airflow, making the airflow within the air duct 125 more uniform and smooth, reducing eddies and turbulence, thereby improving air delivery efficiency. When the air outlet of the volute body 110 is oriented towards the evaporator 300, the wall of the movable air duct 120 can be adjusted according to the size of the evaporator 300, so that the air outlet of the air duct 125 can blow air evenly to the entire evaporator 300, thus solving the problem of existing fans being unable to blow air evenly to the entire evaporator 300.

[0050] Furthermore, adjusting the cross-section of the duct 125 can affect the air velocity and air volume. By adjusting it, air can be ensured to blow onto the evaporator 300 at the appropriate speed and direction to meet different air supply needs. This not only improves the air supply effect but also reduces energy waste. The adjustable air outlet direction allows air to be distributed more evenly across the evaporator 300, avoiding localized overcooling or overheating. The design of the movable duct 120 typically considers ease of maintenance. When cleaning or maintenance is required, the movable duct 120 can be easily disassembled and reinstalled, reducing maintenance difficulty and costs. By optimizing the design of the duct 125 and adjusting the air outlet direction, noise generated during airflow can be reduced. This design helps create a quieter and more comfortable environment.

[0051] Understandably, the air duct 125 has an air inlet and an air outlet, with the air inlet connected to the air outlet and the air outlet directed toward the evaporator 300.

[0052] It is understandable that the central axis of the air outlet is a straight line perpendicular to the cross-section of the air outlet.

[0053] like Figure 4 As shown, the volute body 110 further includes an installation cavity 112 inside, an air outlet 111, and an air outlet 111. The air inlet of the air outlet 111 is connected to the installation cavity 112, and a movable air duct 120 is installed at the air outlet. The air outlet of the movable air duct 120 can be directed toward the evaporator 300.

[0054] Specifically, the cross-section of the air outlet is rectangular.

[0055] Preferably, the cross-section of the air outlet duct 111 is rectangular.

[0056] like Figure 4 and Figure 5 As shown, in some embodiments, the movable duct 120 includes a plurality of first connectors 121 and a plurality of movable adjusters 122; the plurality of first connectors 121 are arranged at intervals along the circumference of the air outlet and are connected to the volute body 110; the movable adjusters 122 are the duct walls of the movable duct 120; the movable adjusters 122 are arranged between two adjacent first connectors 121, and the plurality of movable adjusters 122 and the plurality of first connectors 121 enclose an air duct 125; the movable adjusters 122 are hinged to the first connectors 121 through a hinge shaft 123 to adjust the cross-section and air outlet direction of the air duct 125; the central axis of the hinge shaft 123 intersects the central axis of the air outlet.

[0057] In this embodiment, the movable adjusting member 122 is connected to the first connecting member 121 via a hinge shaft 123 (the central axis of the hinge shaft 123 intersects the central axis of the air outlet), allowing the movable adjusting member 122 to rotate freely within a certain range. This design allows for highly flexible adjustment of the cross-section and air outlet direction of the duct 125 to meet different air supply requirements. By adjusting the position and angle of the movable adjusting member 122, the airflow path within the duct 125 can be optimized, reducing eddies and turbulence and improving air supply efficiency. Adjusting the movable adjusting member 122 also allows for uniform air distribution throughout the evaporator 300. This design has strong adaptability and compatibility, making it suitable for different environments and air supply requirements. The design of the movable duct 120 typically considers ease of installation and maintenance. The connection between the first connecting member 121 and the movable adjusting member 122 is simple and straightforward, facilitating disassembly and reinstallation. This reduces the difficulty and cost of installation and maintenance. The design of the hinge shaft 123 ensures that the movable adjusting member 122 remains stable during rotation, avoiding noise and wear caused by shaking or vibration. This helps improve the stability and reliability of the entire air supply system.

[0058] It should be noted that "multiple" means at least two. In other words, the movable duct 120 includes at least two first connectors 121 and at least two movable adjusting members 122.

[0059] Furthermore, the cross-section of the air outlet is rectangular, and the first connector 121 is installed at the corner of the rectangle. Placing the first connector 121 at the corner of the air outlet not only makes the appearance of the volute 100 more aesthetically pleasing, but also facilitates the adjustment of the movable adjusting member 122.

[0060] Specifically, the movable air duct 120 includes four first connectors 121 and four movable adjusters 122; the four first connectors 121 are located at the four corners of the rectangular air outlet, and a movable adjuster 122 is provided between two adjacent first connectors 121.

[0061] like Figure 7 As shown, specifically, the movable adjusting member 122 is a rotating plate; a hinge shaft 123 is formed at the lower end of the side of the rotating plate facing the first connecting member 121, and a protrusion is formed at the upper end of the outer side of the rotating plate, with a threaded hole inside the protrusion. A first fastener 1242 or a second fastener is threaded into the threaded hole. In other words, a protrusion is formed at the upper end of the side of the rotating plate away from the central axis of the air outlet.

[0062] like Figure 4 and Figure 5As shown, in some embodiments, the volute 100 further includes a second connector 124; the end of the first connector 121 near the air outlet is hinged to the movable adjustment member 122 via a hinge shaft 123, and the end of the first connector 121 away from the air outlet is connected to the movable adjustment member 122 via the second connector 124.

[0063] In this embodiment, the hinge shaft 123 allows the movable adjustment member 122 to rotate freely within a certain range. This flexibility enables more flexible adjustment of the airflow path within the duct 125 to adapt to different air supply requirements. Simultaneously, the connection between the second connector 124 and the first connector 121 further enhances the stability between the movable adjustment member 122 and the volute body 110, ensuring no shaking or vibration during adjustment, thereby improving the overall structural stability. This connection method simplifies the installation process, allowing installers to complete assembly more quickly and accurately. Because the connection between the movable adjustment member 122 and the first connector 121 is relatively simple and straightforward, the movable adjustment member 122 can be easily disassembled and reinstalled when cleaning or maintenance is required, reducing maintenance difficulty and cost. The robust connection and flexible adjustment capability ensure that the movable adjustment member 122 maintains good working condition during long-term use.

[0064] like Figures 4 to 6 As shown, by way of example, the second connector 124 includes an oblong hole and a first fastener 1242; the long axis of the oblong hole 1241 extends around the central axis of the hinge shaft 123; the oblong hole 1241 is provided at the end of the first connector 121 away from the air outlet; the first fastener 1242 is installed in the oblong hole 1241 and is threadedly engaged with the movable adjusting member 122.

[0065] In this embodiment, the first fastener 1242 can be separated from the movable adjusting member 122, or the first fastener 1242 can be loosened. Then, the movable adjusting member 122 can be rotated relative to the first connecting member 121 around the central axis of the hinge shaft 123. When the target position is reached, the first fastener 1242 can be re-threaded into the movable adjusting member 122 to achieve the purpose of adjusting the cross-section of the air duct 125 and the air outlet direction. The design of the oblong hole 1241 allows the movable adjusting member 122 to be finely adjusted within a wider range. Since the long axis of the oblong hole 1241 extends around the central axis of the hinge shaft 123, the movable adjusting member 122 can move along the long axis of the oblong hole 1241, thereby achieving more precise adjustment of the air supply angle or air volume. The cooperation between the oblong hole 1241 and the first fastener 1242 makes the connection between the movable adjusting member 122 and the first connecting member 121 more flexible. This flexibility not only helps adapt to different air supply requirements but also reduces stress concentration caused by vibration or external forces to a certain extent, thereby improving the overall structural durability. The threaded engagement between the first fastener 1242 and the movable adjuster 122 simplifies and speeds up the installation and adjustment process. Installers can easily fix or adjust the position of the movable adjuster 122 by rotating the first fastener 1242 without the need for additional tools or equipment. The design of the oblong hole 1241 helps optimize stress distribution. When subjected to external forces, the oblong hole 1241 guides stress along its long axis, reducing the probability of stress concentration. This design contributes to improving the overall structural strength and durability.

[0066] Preferably, the first fastener 1242 is a screw.

[0067] Preferably, the central axis of the first fastener 1242 is parallel to the central axis of the hinge shaft 123.

[0068] For example, the second connector 124 includes a plurality of mounting holes and a second fastener; the plurality of mounting holes are arranged at intervals around the central axis of the hinge shaft 123; the first connector 121 has a mounting hole at one end away from the air outlet; the second fastener is installed in the mounting hole and is threadedly engaged with the movable adjusting member 122.

[0069] In this embodiment, the second fastener can be removed from the mounting hole first; then, the movable adjusting member 122 is rotated relative to the first connecting member 121 around the hinge axis 123 to the next mounting hole, and finally, the mounting hole is fastened to the movable adjusting member 122 with the second fastener. Through the cooperation of multiple mounting holes and the second fastener, the connection between the movable adjusting member 122 and the first connecting member 121 is more secure. This multi-point fixing method effectively prevents the movable adjusting member 122 from shaking or falling off during adjustment, thereby enhancing the stability of the entire structure. The spaced arrangement of the mounting holes helps to distribute stress more evenly across each mounting hole, thereby reducing stress concentration in a single mounting hole. This design improves the strength and durability of the entire structure and extends its service life. The threaded engagement between the second fastener and the movable adjusting member 122 makes the installation process simpler and faster. Installers can easily fix or adjust the position of the movable adjusting member 122 by rotating the second fastener without using additional tools or equipment. In addition, the second fastener can be easily removed when maintenance or replacement of the movable adjusting part 122 is required, reducing maintenance costs and time.

[0070] like Figure 4 and Figure 6 As shown, in some embodiments, the first connecting member 121 includes a base 1211 and a connecting plate 1212; the base 1211 is connected to the volute body 110; one end of the connecting plate 1212 is formed in the base 1211, and the other end extends along the central axis of the air outlet; the connecting plate 1212 is hinged to the movable adjusting member 122 via a hinge shaft 123. Specifically, the end of the connecting plate 1212 near the air outlet is hinged to the movable adjusting member 122 via the hinge shaft 123, and the end of the connecting plate 1212 away from the air outlet is connected to the movable adjusting member 122 via a second connecting member 124.

[0071] In this embodiment, the direct connection between the base 1211 and the volute body 110 provides a stable support, ensuring that the entire connector will not loosen or deform due to external forces during operation. The connecting plate 1212 extends along the central axis of the air outlet and is hinged to the movable adjustment member 122 via the hinge shaft 123. This design allows the connector to remain stable when subjected to wind or other external forces, and is not prone to displacement or damage.

[0072] Specifically, the connection between the base 1211 and the volute body 110 may include bolt connection, welding or other reliable connection methods, all of which make the installation process simpler and faster.

[0073] Furthermore, the connecting plate 1212 includes two fixed plates 1213 and an arc-shaped plate 1214; the two fixed plates 1213 are arranged crosswise and are respectively hinged to the movable adjusting member; the two fixed plates 1213 are connected by the arc-shaped plate 1214. Specifically, the first connecting member 121 is located at the corner of the rectangular air outlet, and the two fixed plates 1213 correspond to two adjacent sides of the air outlet, improving assembly efficiency. The arc-shaped plate 1214 can reduce airflow resistance.

[0074] like Figure 1 and Figure 6 As shown, preferably, the end of the fixing plate 1213 away from the base 1211 has a waist-shaped hole, and the first fastener 1242 is installed in the waist-shaped hole and threadedly assembled with the threaded hole of the rotating plate.

[0075] like Figure 9 As shown, a specific embodiment of the second aspect of this utility model provides a fan. The fan includes an impeller 200 and a volute 100 as described in any of the above embodiments. The impeller 200 is installed within the mounting cavity 112 of the volute 100. Because this embodiment includes the volute 100 of any of the above embodiments, it possesses at least the aforementioned advantages, which will not be elaborated further here.

[0076] like Figure 8 and Figure 9 As shown, a specific embodiment of the third aspect of this utility model provides a duct air conditioner. This duct air conditioner includes the volute 100 of any of the above embodiments, or the fan of any of the above embodiments.

[0077] Because the duct unit of this embodiment includes the volute 100 or fan of any of the above embodiments, it has at least the advantages described above, which will not be repeated here. Furthermore, from... Figure 8 and Figure 9 As can be seen from the air outlet direction, the volute 100 can directly blow air to the entire area of ​​the evaporator 300, without the problem of uneven airflow in the middle of the evaporator 300 or the problem of wasted airflow at both ends of the evaporator 300.

[0078] Furthermore, the ducted air conditioner also includes an evaporator 300; the air outlet of the movable duct 120 faces the evaporator 300. The movable adjusting element 122 can be adjusted according to the size of the evaporator 300 to make the airflow evenly distributed throughout the evaporator 300, resulting in a more uniform airflow to the evaporator 300.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A volute, characterized in that, include: The main body of the volute (110) has an air outlet; A movable air duct (120) is installed on the volute body (110); the movable air duct (120) has an air channel (125) which is connected to the air outlet; the pipe wall of the movable air duct (120) is used to move closer to or further away from the central axis of the air outlet to adjust the cross-section and air outlet direction of the air channel (125).

2. The volute according to claim 1, characterized in that, The movable air duct (120) includes: A plurality of first connectors (121) are arranged at circumferential intervals along the air outlet and are connected to the volute body (110); Multiple movable adjustment components (122) are the pipe walls of the movable air duct (120); the movable adjustment components (122) are arranged between two adjacent first connecting components (121), and the multiple movable adjustment components (122) and the multiple first connecting components (121) enclose the air duct (125); the movable adjustment components (122) are hinged to the first connecting components (121) through a hinge shaft (123) to adjust the cross-section and air outlet direction of the air duct (125); the central axis of the hinge shaft (123) intersects the central axis of the air outlet.

3. The volute according to claim 2, characterized in that, Also includes: The second connector (124) is connected to the movable adjustment member (122) via the hinge shaft (123) at one end of the first connector (121) near the air outlet, and the movable adjustment member (122) is connected to the first connector (121) away from the air outlet via the second connector (124).

4. The volute according to claim 3, characterized in that, The second connector (124) includes: The long axis of the waist-shaped hole (1241) extends around the central axis of the hinge shaft (123); the first connector (121) has a waist-shaped hole (1241) at the end away from the air outlet. The first fastener (1242) is installed in the waist-shaped hole (1241) and is threadedly engaged with the movable adjusting member (122).

5. The volute according to claim 3, characterized in that, The second connector (124) includes: Multiple mounting holes are arranged at intervals around the central axis of the hinge shaft (123); the mounting holes are opened at the end of the first connector (121) away from the air outlet; The second fastener is installed in the mounting hole and is threaded into the movable adjusting member (122).

6. The volute according to claim 2, characterized in that, The first connector (121) includes: The base (1211) is connected to the volute body (110); A connecting plate (1212) is formed at one end of the base (1211) and extends along the central axis of the air outlet at the other end; the connecting plate (1212) is hinged to the movable adjusting member (122) through the hinge shaft (123).

7. The volute according to claim 6, characterized in that, The connecting plate (1212) includes: Two fixed plates (1213) are arranged crosswise and are respectively hinged to two movable adjusting members (122); The two fixed plates (1213) are connected by the arc plate (1214).

8. The volute according to any one of claims 2 to 7, characterized in that, The air outlet has a rectangular cross-section, and the first connector (121) is installed at the corner of the rectangle.

9. A fan, characterized in that, It includes an impeller (200) and a volute (100) as described in any one of claims 1 to 8; the impeller (200) is installed in the mounting cavity (112) of the volute (100).

10. A ducted air conditioner, characterized in that, Includes the volute (100) as described in any one of claims 1 to 8, or the fan as described in claim 9.

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