Exhaust pipe assembly, volute and electrical equipment

Abstract

The invention provides an exhaust pipe assembly, a volute and electrical equipment wherein the exhaust pipe assembly comprises: a pipe body, the pipe body comprises a plurality of assembly parts, the plurality of assembly parts are annularly distributed, and the plurality of assembly parts can move relatively; and the adjusting assembly is movably arranged on the pipe body, and the adjusting assembly is used for adjusting the opening area of the first end of the pipe body.

Description

Technical Field

[0001] The present invention relates to the technical field of fans, and in particular to an exhaust pipe assembly, a volute and an electrical appliance. Background Art

[0002] A volute fan generally includes an impeller and a volute. The impeller rotates to generate air flow, which is discharged after being diffused by the volute.

[0003] In the related art, a volute fan generally has a preset design flow rate, and the outlet cross-sectional area of the corresponding volute is set to correspond to the design flow rate to achieve high-efficiency operation of the volute fan at the design flow rate. However, the air outlet of the volute can only meet the efficient operation under a certain working condition, and when the working condition changes, the efficiency decreases due to the mismatch with the oncoming flow of different parameters. Summary of the Invention

[0004] The present invention aims to at least solve or improve the technical problem that the air outlet of the volute in the prior art cannot adapt to different air flow rates.

[0005] To this end, a first aspect of the present invention provides an exhaust pipe assembly.

[0006] A second aspect of the present invention provides a volute.

[0007] A third aspect of the present invention provides an electrical appliance.

[0008] In view of this, according to the first aspect of the present invention, an exhaust pipe assembly is provided, including: a pipe body, the pipe body includes a plurality of assembled parts, the plurality of assembled parts are distributed in a ring, and the plurality of assembled parts are relatively movable; an adjusting assembly, movably arranged on the pipe body, and the adjusting assembly is used to adjust the opening area of the first end of the pipe body.

[0009] The exhaust pipe assembly provided by the present invention includes: a pipe body and an adjusting assembly. The pipe body includes a plurality of assembled parts, the plurality of assembled parts are assembled into a ring structure, and moreover, the plurality of assembled parts are relatively movable. The adjusting assembly is movably arranged on the pipe body, and the movement of the adjusting assembly can make the assembled parts move. The movement of the assembled parts can change the opening area of the first end of the pipe body, so as to adapt to different air flow rates, so that the volute or the electrical appliance can have better efficiency under different working conditions.

[0010] In addition, according to the above technical solution of the exhaust pipe assembly provided by the present invention, the following additional technical features may also be provided:

[0011] In some embodiments, optionally, the adjusting assembly includes: an adjusting member movably disposed on the pipe body. The adjusting member can move along the axial direction of the pipe body. When the adjusting member is in the first position, the opening area of the first end of the pipe body is the first area. When the adjusting member is in the second position, the opening area of the first end of the pipe body is the second area. The first position is farther from the first end of the pipe body than the second position, and the first area is larger than the second area.

[0012] In this embodiment, the adjusting assembly includes an adjusting member movably disposed on the pipe body, and the adjusting member can move along the axial direction of the pipe body. When the adjusting member moves to the first position, the opening area of the first end of the pipe body is the first area. When the adjusting member moves to the second position, the opening area of the first end of the pipe body is the second area.

[0013] Wherein, the first position is farther from the first end of the pipe body than the second position, and the first area is larger than the second area. Thus, by moving the adjusting member, the opening area of the first end of the exhaust pipe assembly is adjusted.

[0014] In some embodiments, optionally, the adjusting member has an annular structure and is sleeved outside the pipe body.

[0015] In this embodiment, the adjusting member has an annular structure and is sleeved outside the pipe body. The adjusting member is clamped outside the pipe body, improving the limiting effect of the adjusting member on the movement of the assembled part and enhancing the control accuracy of the opening area of the first end of the pipe body.

[0016] When the adjusting member moves along the axial direction of the pipe body in the first direction, the assembled part is squeezed by the adjusting member and rotates towards the inside of the pipe body, thereby reducing the opening area of the first end of the pipe body.

[0017] When the adjusting member moves along the axial direction of the pipe body in the second direction, the assembled part rotates towards the outside of the pipe body, thereby increasing the opening area of the first end of the pipe body.

[0018] In some embodiments, optionally, the adjusting assembly further includes: a rack connected to the adjusting member, and the rack is used to drive the adjusting member to move.

[0019] In this embodiment, the adjusting assembly further includes a rack connected to the adjusting member. The rack can drive the adjusting member to move. The cooperation between the rack and the gear can achieve a locking effect to ensure that the opening area of the first end of the pipe body can stay in the required situation. Moreover, the movement accuracy of the rack is high, enhancing the reliability of the matching between the pipe body and the air flow rate.

[0020] In some embodiments, optionally, the assembled part includes: a main body; a convex portion disposed on the main body; a reset member disposed on the main body, and the reset member abuts against the convex portion of the adjacent assembled part.

[0021] In this embodiment, the assembling piece includes a main body, a protrusion and a reset piece, the protrusion and the reset piece are arranged on the main body, the main bodies of multiple assembling pieces are matched and spliced ​​into a tube body, the main body is provided with a protrusion and a reset piece, the reset piece of an assembling piece and the protrusion of the adjacent assembling piece are abutted against each other, and thus the adjacent assembling pieces can move relative to each other.

[0022] Specifically, when the adjusting member moves to the second position, the reset member is squeezed by the protrusions of the main body and another assembly member, and the opening area of ​​the first end of the tube body is smaller. When the adjusting member moves to the first position, the reset member supports the protrusions of the main body and another assembly member, thereby increasing the opening area of ​​the first end of the tube body. Automatic reset of the first end of the tube body can be achieved by setting the reset member.

[0023] In some embodiments, optionally, along the circumference of the tube body, the length of the first end of the main body is greater than the length of the second end of the main body.

[0024] In this embodiment, along the circumference of the tube body, the length of the first end of the main body is greater than the length of the second end of the main body, that is, the main body is roughly wedge-shaped and the tube body is trumpet-shaped, which increases the adjustment range of the opening area of ​​the first end of the tube body.

[0025] In some embodiments, optionally, the main body includes a guide surface, the reset element is disposed on one side of the main body, and the guide surface is located on a side of the protrusion facing away from the reset element.

[0026] In this embodiment, the main body includes a guide surface, and the reset member and the guide surface are respectively arranged on opposite sides of the protrusion, so that the guide surfaces of one assembly part and another assembly part are abutted against each other to ensure that during the process of adjusting the opening area of ​​the first end of the tube body, adjacent assembly parts can be abutted against each other, thereby reducing the possibility of air leakage between the assembly parts.

[0027] In some embodiments, optionally, the second end of the assembly piece includes a first connecting portion, and the first connecting portion is used to be movably connected to the volute body.

[0028] In this embodiment, the second end of the assembly piece includes a first connecting portion, and the first connecting portion and the volute body are movably connected. Therefore, when the pipe body adjusts the opening area of ​​the first end, the assembly piece moves relative to the volute body, thereby ensuring the reliability of the connection between the exhaust pipe assembly and the volute body.

[0029] In some embodiments, optionally, the first connection is a ball joint connection.

[0030] In this embodiment, the first connection portion includes a ball-joint connection portion, thereby increasing the degree of freedom of the assembly and reducing the possibility that the movement of the assembly is interfered with by the volute body, thereby making the movement of the assembly smoother.

[0031] According to a second aspect of the present invention, the present invention provides a volute, including a volute main body; and an exhaust pipe assembly as proposed in the embodiment of the first aspect, the exhaust pipe assembly being disposed on the volute main body, and a first end of the exhaust pipe assembly facing away from the volute main body.

[0032] The volute provided by the present invention includes the exhaust pipe assembly as proposed in the embodiment of the first aspect, and thus has all the beneficial effects of the exhaust pipe assembly as proposed in the embodiment of the first aspect, which will not be elaborated one by one herein.

[0033] According to a third aspect of the present invention, the present invention provides an electrical device, including: the exhaust pipe assembly as proposed in the embodiment of the first aspect; or the volute as proposed in the embodiment of the second aspect.

[0034] The electrical device provided by the present invention includes the exhaust pipe assembly as proposed in the embodiment of the first aspect or the volute as proposed in the embodiment of the second aspect, and thus has all the beneficial effects of the exhaust pipe assembly as proposed in the embodiment of the first aspect or the volute as proposed in the embodiment of the second aspect, which will not be elaborated one by one herein.

[0035] The additional aspects and advantages of the present invention will become apparent in the following description section, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, where:

[0037] Figure 1 A schematic structural diagram of an exhaust pipe assembly provided by an embodiment of the present invention is shown;

[0038] Figure 2 A schematic structural diagram of a pipe body provided by an embodiment of the present invention is shown;

[0039] Figure 3 A schematic structural diagram of an exhaust pipe assembly provided by an embodiment of the present invention is shown;

[0040] Figure 4 A schematic structural diagram of two assembled parts and an adjustment assembly in an exhaust pipe assembly provided by an embodiment of the present invention is shown;

[0041] Figure 5 A schematic structural diagram of an assembled part in an exhaust pipe assembly provided by an embodiment of the present invention is shown;

[0042] Figure 6 A schematic structural diagram of a volute provided by an embodiment of the present invention is shown;

[0043] Figure 7 A schematic structural diagram of a volute provided by an embodiment of the present invention is shown.

[0044] Among them, Figures 1 to 7 The corresponding relationship between the reference numerals in the drawings and the component names is as follows:

[0045] 100 exhaust pipe assembly, 110 pipe body, 112 assembled parts, 114 main body, 116 convex part, 118 reset part, 120 guiding surface, 122 first connecting part, 130 adjusting assembly, 132 adjusting part, 134 rack, 200 volute, 210 volute main body. Detailed implementation manners

[0046] In order to more clearly understand the above objects, features and advantages of the present invention, the present invention will be further described in detail below with reference to the drawings and specific implementation manners. It should be noted that, without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

[0047] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited by the specific embodiments disclosed below.

[0048] Next, refer to Figures 1 to 7 to describe the exhaust pipe assembly 100, volute 200 and electrical equipment provided according to some embodiments of the present invention.

[0049] As Figure 1 , Figure 2 and Figure 3 shown, according to the first aspect of the present invention, the present invention provides an exhaust pipe assembly 100, the exhaust pipe assembly 100 includes a pipe body 110 and an adjusting assembly 130. The pipe body 110 is assembled by a plurality of assembled parts 112. The plurality of assembled parts 112 are arranged along the circumferential direction of the pipe body 110, so as to assemble into the pipe body 110, and the plurality of assembled parts 112 can move relative to each other. The adjusting assembly 130 is arranged on the pipe body 110, and the adjusting assembly 130 can adjust the opening area of the first end of the pipe body 110.

[0050] The exhaust pipe assembly 100 provided by the present invention includes: a pipe body 110 and an adjusting assembly 130. The pipe body 110 includes a plurality of assembled parts 112. The plurality of assembled parts 112 are assembled into an annular structure. And, the plurality of assembled parts 112 can move relative to each other. The adjusting assembly 130 is movably arranged on the pipe body 110. The movement of the adjusting assembly 130 can make the assembled parts 112 move. The movement of the assembled parts 112 can change the opening area of the first end of the pipe body 110, so as to adapt to different air flow rates, so that the volute 200 or the electrical equipment can have better efficiency under different working conditions, and on the premise of ensuring the structural reliability of the electrical equipment, improve the efficiency of the electrical equipment under different working conditions.

[0051] As Figure 1 , Figure 3 and Figure 4 shown, in some embodiments, optionally, the adjusting assembly 130 includes an adjusting member 132 movably disposed on the pipe body 110. The adjusting member 132 can move axially along the pipe body 110 to a first position and a second position. When the adjusting member 132 is in the first position, the opening area of the first end of the pipe body 110 is a first area. When the adjusting member 132 is in the second position, the opening area of the first end of the pipe body 110 is a second area. The first position is farther from the first end of the pipe body 110 than the second position, and the first area is larger than the second area.

[0052] In this embodiment, the adjusting assembly 130 includes an adjusting member 132 movably disposed on the pipe body 110. Moreover, the adjusting member 132 can move axially along the pipe body 110. When the adjusting member 132 moves to the first position, the opening area of the first end of the pipe body 110 is a first area. When the adjusting member 132 moves to the second position, the opening area of the first end of the pipe body 110 is a second area.

[0053] Wherein, the first position is farther from the first end of the pipe body 110 than the second position, and the first area is larger than the second area. Thus, by moving the adjusting member 132, the opening area of the first end of the exhaust pipe assembly 100 is adjusted.

[0054] The above first position can be any position to which the adjusting member 132 can move, and the second position can be any position to which the adjusting member 132 can move.

[0055] As Figure 1 and Figure 4 shown, in some embodiments, optionally, the adjusting member 132 has an annular structure and is sleeved outside the pipe body 110.

[0056] In this embodiment, the adjusting member 132 has an annular structure and is sleeved outside the pipe body 110. The adjusting member 132 is hoop-shaped outside the pipe body 110, improving the restricting effect of the adjusting member 132 on the movement of the assembled part 112 and improving the control accuracy of the opening area of the first end of the pipe body 110.

[0057] As Figure 3 shown, when the adjusting member 132 moves axially along the pipe body 110 in a first direction, the assembled part 112 is squeezed by the adjusting member 132 and rotates towards the inside of the pipe body 110, thereby reducing the opening area of the first end of the pipe body 110. When the adjusting member 132 moves axially along the pipe body 110 in a second direction, the assembled part 112 rotates towards the outside of the pipe body 110, thereby increasing the opening area of the first end of the pipe body 110.

[0058] That is, the outer edge of the adjusting member 132 cooperates with the outer edge of the assembling member 112.

[0059] Such as Figure 1 and Figure 3 shown, in some embodiments, optionally, the adjusting assembly 130 further includes a rack 134 connected to the adjusting member 132, and the rack 134 is used to drive the adjusting member 132 to move.

[0060] In this embodiment, the adjusting assembly 130 further includes a rack 134 connected to the adjusting member 132. The rack 134 can drive the adjusting member 132 to move. The cooperation between the rack 134 and the gear can achieve a locking effect to ensure that the opening area of the first end of the pipe body 110 can stay in the required condition. Moreover, the movement precision of the rack 134 is high, improving the reliability of the matching between the pipe body 110 and the air flow rate.

[0061] Such as Figure 1 , Figure 2 , Figure 4 and Figure 5 shown, in some embodiments, optionally, the assembling member 112 includes a main body 114, a convex portion 116 and a reset member 118. The convex portion 116 is arranged on the main body 114, the reset member 118 is arranged on the main body 114, and the reset member 118 abuts against the convex portion 116 of the adjacent assembling member 112.

[0062] In this embodiment, the assembling member 112 includes a main body 114, a convex portion 116 and a reset member 118. The convex portion 116 and the reset member 118 are arranged on the main body 114. The main bodies 114 of multiple assembling members 112 cooperate to form the pipe body 110. The convex portion 116 and the reset member 118 are arranged on the main body 114. The reset member 118 of one assembling member 112 abuts against the convex portion 116 of the adjacent assembling member 112, so that the adjacent assembling members 112 can move relative to each other.

[0063] Specifically, when the adjusting member 132 moves to the second position, the reset member 118 is squeezed by the main body 114 and the convex portion 116 of another assembling member 112, and the opening area of the first end of the pipe body 110 is small. When the adjusting member 132 moves to the first position, the reset member 118 supports the main body 114 and the convex portion 116 of another assembling member 112, so that the opening area of the first end of the pipe body 110 increases. Through the setting of the reset member 118, automatic reset of the first end of the pipe body 110 can be realized.

[0064] Among them, the main body 114, the convex portion 116 and the reset member 118 can be an integral structure.

[0065] Such as Figure 5As shown, in some embodiments, optionally, along the circumferential direction of the pipe body 110, the length of the first end of the main body 114 is greater than the length of the second end of the main body 114.

[0066] In this embodiment, along the circumferential direction of the pipe body 110, the length of the first end of the main body 114 is greater than the length of the second end of the main body 114, that is, the main body 114 is generally in a wedge-shaped structure, and the pipe body 110 is in a flared structure, improving the adjustment range of the opening area of the first end of the pipe body 110.

[0067] As Figure 3 shown, when the adjusting member 132 moves along the axial direction of the pipe body 110 to the first direction, the assembling member 112 is squeezed by the adjusting member 132 and rotates towards the inner side of the pipe body 110, thereby reducing the opening area of the first end of the pipe body 110. When the adjusting member 132 moves along the axial direction of the pipe body 110 to the second direction, the assembling member 112 rotates towards the outer side of the pipe body 110, thereby increasing the opening area of the first end of the pipe body 110.

[0068] As Figure 1 、 Figure 2 、 Figure 4 and Figure 5 shown, in some embodiments, optionally, the main body 114 includes a guiding surface 120, a reset member 118 is arranged on one side of the main body 114, and the guiding surface 120 is located on the side of the convex portion 116 away from the reset member 118.

[0069] In this embodiment, the main body 114 includes a guiding surface 120, the reset member 118 and the guiding surface 120 are respectively arranged on the opposite sides of the convex portion 116, and then the guiding surfaces 120 of one assembling member 112 and the other assembling member 112 are in contact with each other, so as to ensure that adjacent assembling members 112 can be in contact with each other during the process of adjusting the opening area of the first end of the pipe body 110, reducing the possibility of air leakage between the assembling members 112.

[0070] As Figure 5 shown, in some embodiments, optionally, the second end of the assembling member 112 includes a first connecting portion 122, and the first connecting portion 122 is used for movably connecting with the volute main body 210.

[0071] In this embodiment, the second end of the assembling member 112 includes a first connecting portion 122, and the first connecting portion 122 is movably connected with the volute main body 210. Further, during the process of adjusting the opening area of the first end of the pipe body 110, the splicing member moves relative to the volute main body 210, thereby ensuring the reliability of the connection between the exhaust pipe assembly 100 and the volute main body 210.

[0072] As Figure 5 shown, in some embodiments, optionally, the first connecting portion 122 includes a spherical pair connecting portion.

[0073] In this embodiment, the first connecting portion 122 includes a spherical pair connecting portion, thereby increasing the degree of freedom of the assembled member 112 and reducing the possibility that the movement of the assembled member 112 is interfered by the volute main body 210, making the movement of the assembled member 112 smoother.

[0074] As Figure 6 and Figure 7 shown, according to the second aspect of the present invention, the present invention provides a volute 200, including a volute main body 210; as the exhaust pipe assembly 100 proposed in the embodiment of the first aspect, the exhaust pipe assembly 100 is disposed on the volute main body 210, and the first end of the exhaust pipe assembly 100 faces away from the volute main body 210.

[0075] Specifically, a second connecting portion is provided on the volute 200, and the first connecting portion 122 cooperates with the second connecting portion. Among them, the second connecting portion may be a groove, and the first connecting portion 122 is embedded in the groove, thereby realizing the movable connection between the volute 200 and the exhaust pipe assembly 100.

[0076] Since the volute 200 provided by the present invention includes the exhaust pipe assembly 100 proposed in the embodiment of the first aspect, therefore, it has all the beneficial effects of the exhaust pipe assembly 100 provided in the embodiment of the first aspect, which will not be elaborated one by one here.

[0077] A volute 200 provided by the present invention includes a volute main body 210 and an exhaust pipe assembly 100. The exhaust pipe assembly 100 includes a plurality of movably assembled members 112. The plurality of assembled members 112 are circumferentially spaced apart on the volute main body 210 at the outlet of the volute main body 210. The adjusting assembly 130 contacts the outer edge of the assembled member 112, and each assembled member 112 can be interlocked with each other as the adjusting assembly 130 moves along the axial direction of the pipe body 110, thereby adjusting the opening area of the first end of the pipe body 110.

[0078] By changing the opening area of the first end of the pipe body 110 of the exhaust pipe assembly 100, the volute 200 can be matched with airflows of different parameters, thereby adapting to different working conditions of the electrical equipment, which is beneficial to the electrical equipment to achieve higher efficiency under different working conditions.

[0079] According to the third aspect of the present invention, the present invention provides an electrical equipment, including: the exhaust pipe assembly 100 provided in the embodiment of the first aspect; or the volute 200 provided in the embodiment of the second aspect.

[0080] Since the electrical equipment provided by the present invention includes the exhaust pipe assembly 100 provided in the embodiment of the first aspect or the volute 200 provided in the embodiment of the second aspect, therefore, it has all the beneficial effects of the exhaust pipe assembly 100 provided in the embodiment of the first aspect or the volute 200 provided in the embodiment of the second aspect, which will not be elaborated one by one here.

[0081] Specifically, the electrical equipment includes a blower, a hair dryer, an air conditioner, a fan, etc.

[0082] In the present invention, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "joined", "fixed", etc. shall be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "joined" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0083] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or units referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be construed as a limitation to the present invention.

[0084] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "specific embodiments", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0085] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An exhaust pipe assembly, characterized in that, Comprising: A pipe body, the pipe body includes a plurality of assembled parts, the plurality of assembled parts are distributed in a ring shape, and the plurality of assembled parts are relatively movable; An adjusting assembly, movably arranged on the pipe body, the adjusting assembly is used to adjust the opening area of the first end of the pipe body.

2. The exhaust pipe assembly according to claim 1, wherein, The adjusting assembly includes: An adjusting member, movably arranged on the pipe body, the adjusting member can move along the axial direction of the pipe body. When the adjusting member is in the first position, the opening area of the first end of the pipe body is the first area. When the adjusting member is in the second position, the opening area of the first end of the pipe body is the second area. The first position is farther from the first end of the pipe body than the second position, and the first area is larger than the second area.

3. The exhaust pipe assembly according to claim 2, wherein The adjusting member has an annular structure and is sleeved on the outside of the pipe body.

4. The exhaust pipe assembly according to claim 2, wherein, The adjusting assembly further includes: A rack, connected to the adjusting member, the rack is used to drive the adjusting member to move.

5. The exhaust pipe assembly according to any one of claims 1 to 4, characterized in that The assembled part includes: A main body; A convex portion, arranged on the main body; A reset member, arranged on the main body, the reset member abuts against the convex portion of the adjacent assembled part.

6. The exhaust pipe assembly according to claim 5, wherein Along the circumferential direction of the pipe body, the length of the first end of the main body is greater than the length of the second end of the main body.

7. The exhaust pipe assembly according to claim 5, wherein The main body includes a guiding surface, the reset member is arranged on one side of the main body, and the guiding surface is located on the side of the convex portion away from the reset member.

8. The exhaust pipe assembly according to any one of claims 1 to 4, wherein The second end of the assembled part includes a first connecting portion, and the first connecting portion is used to be movably connected to the volute main body.

9. The exhaust pipe assembly according to claim 8, wherein The first connecting portion is a spherical pair connecting portion.

10. A volute, characterized in that, Comprising: A volute main body; The exhaust pipe assembly according to any one of claims 1 to 9, the exhaust pipe assembly is arranged on the volute main body, and the first end of the exhaust pipe assembly faces away from the volute main body.

11. An electrical device, characterized in that, Comprising: The exhaust pipe assembly according to any one of claims 1 to 9; Or The volute according to claim 10.

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