Fan volute and range hood

Abstract

The utility model relates to a fan volute and a range hood. The fan volute comprises a volute body and a volute tongue plate, a volute tongue hole is formed in the side, close to an outlet, of the volute body, and the volute tongue plate and the volute body are fixed to seal the volute tongue hole; the volute body comprises two shells, each shell comprises a side panel and a peripheral panel perpendicular to the side panel, the two peripheral panels are fixed to each other so that a volute cavity can be formed in the two shells, and the volute tongue holes are formed in the peripheral panels; a traditional two-end splicing structure is replaced by the half-and-half splicing structure of the two shells, only the joints for fixing positions of the two peripheral panels are arranged, the number of the joints is reduced, the possibility of flow leakage in the volute using process is reduced, and meanwhile the volute assembling difficulty is lowered; in addition, the independently-formed volute tongue plate is arranged and fixed to the volute body, it can be better guaranteed that the volute tongue does not deform, and the performance consistency of the volute is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field related to range hoods, in particular to a fan volute and a range hood. Background Art

[0002] Traditional centrifugal fans mostly use metal volute components, which are mostly composed of a volute front cover, a panel and a volute rear cover. The front and rear covers and the panel are installed through a pre-positioning structure and then connected by welding, riveting and other processes;

[0003] However, on the one hand, there will be gaps in the conventional two-end splicing structure and the pre-positioning structure, and these gaps will cause flow leakage during the use of the volute, which is more serious under high pressure conditions; on the other hand, there is a large curvature change in the shroud at the volute tongue, and there will be serious uncontrollable deformation in the actual processing process, and the performance is unstable. Utility Model Content

[0004] Based on this, it is necessary to provide a fan volute and range hood that are not prone to leakage and deformation during processing, in order to address the problems of flow leakage and tensile deformation in the current volute structure.

[0005] The present application first provides a fan volute, comprising a volute body and a volute tongue plate, wherein a volute tongue hole is opened on one side of the volute body close to an outlet, and the volute tongue plate is fixed to the volute body to close the volute tongue hole;

[0006] The volute body includes two shells, each of which includes a side panel and a peripheral panel perpendicular to the side panel. The two peripheral panels are fixed to each other to form a volute cavity inside the two shells, and the volute tongue hole is opened in the peripheral panel.

[0007] In one of the embodiments, the two peripheral panels have the same height along the axial direction of the volute cavity, and both peripheral panels are provided with a volute tongue groove, and the two volute tongue grooves are interconnected to form the volute tongue hole.

[0008] In one of the embodiments, the height of the position where the volute tongue groove is provided in the peripheral panel is in the range of 5 mm to 25 mm along the axial direction of the volute cavity.

[0009] In one of the embodiments, the volute tongue plate is welded and fixed to the shell to close the volute tongue hole.

[0010] In one of the embodiments, one of the peripheral plate and the snail tongue plate is provided with a positioning hole, and the other is provided with a positioning protrusion that can be correspondingly engaged with the positioning hole.

[0011] In one of the embodiments, a plug-in portion is fixedly provided at one end of one of the peripheral panels away from the corresponding side panel, and the plug-in portion is in contact with and fixed to the other peripheral panel along the radial direction of the volute cavity.

[0012] In one of the embodiments, the plug-in portion contacts and is fixed to an outer wall of another peripheral panel along a radial direction of the volute cavity.

[0013] In one of the embodiments, the height of the plug-in portion along the axial direction of the volute cavity ranges from 5 mm to 20 mm.

[0014] In one of the embodiments, the plug-in portion is fixed to the other peripheral panel by welding.

[0015] A second aspect of the present application provides a range hood comprising the above-mentioned fan volute.

[0016] The above-mentioned fan volute replaces the traditional two-end splicing structure with a half-splicing structure of two shells, and only has two seams at the fixed positions of the peripheral panels, which reduces the number of seams and reduces the possibility of flow leakage during the use of the volute, while also reducing the difficulty of assembling the volute; in addition, by providing an independently formed volute tongue plate and fixing it to the volute body, it can better ensure that the volute tongue does not deform and ensure the consistency of the volute performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of the fan volute of this application;

[0018] Figure 2 for Figure 1 Exploded diagram of

[0019] Figure 3 for Figure 1 Stereoscopic image after sectioning;

[0020] Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0021] Figure numerals: 10, volute body; 10a, volute tongue hole; 11, shell; 111, side panel; 112, peripheral panel; 112a, volute tongue groove; 112b, positioning hole; 112c, plug-in part; 20, volute tongue plate; 21, positioning protrusion; 30, volute cavity; 40, outlet flange. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0023] In the description of the present invention, 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", "axial", "radial", "circumferential" and the like 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 invention and simplifying the description, and do not indicate or imply that the referred device or element 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 invention.

[0024] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0025] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0028] Please combine Figure 1 as well as Figure 2 As shown, the present application first provides a fan volute, including a volute body 10 and a volute tongue plate 20. The volute body 10 is provided with a volute tongue hole 10a on one side close to the outlet, and the volute tongue plate 20 is fixed to the volute body 10 to close the volute tongue hole 10a; the volute body 10 includes two shells 11, each shell 11 includes a side panel 111 and a peripheral panel 112 perpendicular to the side panel 111, the two peripheral panels 112 are fixed to each other to form a volute cavity 30 inside the two shells 11, and the volute tongue hole 10a is opened in the peripheral panel 112.

[0029] In the present application, the conventional two-end splicing structure is replaced by a half-splicing structure of two shells 11, and only two seams of the surrounding panels 112 are provided at fixed positions, thereby reducing the number of seams, reducing the possibility of flow leakage during the use of the volute, and also reducing the difficulty of assembling the volute.

[0030] It is worth mentioning that the enclosure of the traditional two-end spliced ​​structure is in a flat state before assembly and needs to be manually rolled during the assembly process. It has no molding and the material thickness is generally thin, and the structural strength is low. In the present application, the surrounding panel 112 of the shell 11 is obtained by stretching the side panel 111, and the overall strength of the arc surface part of the volute body 10 is greatly improved compared with the traditional enclosure.

[0031] In addition, the surrounding panel 112 is usually obtained by a stretching process. For positions with large curvature changes such as the volute tongue, uncontrollable deformation may occur during the actual stretching process, such as stretching shortage, wrinkles, deformation, etc., which will cause uncontrollable impact on the performance of the volute. The present application provides an independently formed volute tongue plate 20 and fixes it to the volute body 10, which can better ensure that the volute tongue does not deform and ensure the consistency of the volute performance.

[0032] Specifically, the curve of the outer side surface of the volute tongue plate 20 along the radial direction of the volute cavity 30 is aligned with the curve of the inner side surface of the surrounding panel 112 , that is, the volute tongue plate 20 is attached to and fixed to the inner side surface of the surrounding panel 112 .

[0033] Of course, the form of the volute tongue plate 20 is not limited to a straight volute tongue, and a variable diameter volute tongue, an inclined volute tongue, etc. may also be adopted; the fixing position of the volute tongue plate 20 is not limited to the inner side of the surrounding panel 112, and it may also be fixed to the outer side of the surrounding panel 112.

[0034] In some embodiments, the fan volute further includes an outlet flange 40 , and the outlet flange 40 is fixed to the outlet position of the volute body 10 .

[0035] Please combine Figure 1 as well as Figure 2 As shown, in some embodiments, the two peripheral panels 112 have the same height along the axis of the volute cavity 30, and both peripheral panels 112 are provided with a volute tongue groove 112a, which are interconnected to form a volute tongue hole 10a.

[0036] By designing the two peripheral panels 112 to have the same height along the axial direction of the volute cavity 30 , it is possible to ensure that the strength of the two shells 11 is consistent, thereby increasing the overall structural strength of the volute body 10 as much as possible.

[0037] Of course, according to different actual needs, the heights of the two peripheral panels 112 along the axial direction of the volute cavity 30 can also be designed to be different, and the present application does not make further limitations here.

[0038] Please combine Figure 1 as well as Figure 2 As shown, in some embodiments, the height range of the position where the volute tongue groove 112a is opened on the surrounding panel 112 along the axial direction of the volute cavity 30 is 5mm to 25mm; it is not difficult to understand that if the height of the position where the volute groove 112a is located along the axial direction of the volute cavity 30 is too large, uncontrollable deformation may still occur at this position during the stretching forming process. On the contrary, if the height is too small, it is not conducive to the fitting installation of the volute tongue plate 20 and the surrounding panel 112, and flow leakage may occur at the connection position between the two.

[0039] According to calculation and test verification, when the height of the volute tongue groove 112a along the axial direction of the volute cavity 30 is controlled at 5mm to 25mm, it can ensure that the processing and molding of the surrounding panel 112 at this position meets actual needs, and it is also convenient for the installation of the volute tongue plate 20.

[0040] Please combine Figure 1 as well as Figure 2 As shown, in some embodiments, the volute tongue plate 20 is welded and fixed to the housing 11 to close the volute tongue hole 10a.

[0041] Of course, in some other embodiments, the volute plate 20 and the shell 11 may be fixed by bolts, clamping or other commonly used fixing methods; in addition, the volute plate 20 and the shell 11 may also be sealed by providing seals to increase the sealing performance and prevent flow leakage, which are not listed one by one in this application.

[0042] Please combine Figure 1 as well as Figure 2 As shown, in some embodiments, one of the surrounding plate 112 and the volute tongue plate 20 is provided with a positioning hole 112b, and the other is provided with a positioning protrusion 21 that can be correspondingly engaged with the positioning hole 112b.

[0043] The snap-fitting between the positioning hole 112b and the positioning protrusion 21 can ensure the assembly accuracy between the volute tongue plate 20 and the surrounding panel 112, avoid performance variation due to displacement of the volute tongue plate 20, and reduce the assembly difficulty between the two.

[0044] Preferably, a positioning hole 112 b is formed on the peripheral panel 112 , and a positioning protrusion 21 is formed on the outer side surface of the volute tongue plate 20 .

[0045] It should be noted that most traditional volute splicing structures use flange edges, which are fixed by screws, secondary riveting, etc. Such flange edges are at least 5 mm wide, which will cause the internal channel of the volute to lose at least 10 mm of available space in the width direction, thereby limiting the volume of the volute and having a lot of impact on the aerodynamic performance.

[0046] In this regard, please combine Figure 3 as well as Figure 4 As shown, in some embodiments, a plug-in portion 112 c is fixedly disposed at one end of one peripheral panel 112 away from the corresponding side panel 111 , and the plug-in portion 112 c contacts and is fixed to the other peripheral panel 112 along the radial direction of the volute cavity 30 .

[0047] Specifically, the plug-in portion 112 c is a step portion that is raised along one side of the radial direction of the volute cavity 30 , and the thickness of the plug-in portion 112 c is the same as the thickness of the surrounding panel 112 .

[0048] When the surrounding panel 112 is plugged into the plug-in portion 112c, the step surface of the plug-in portion 112c along the axial direction can limit the insertion depth, while the step surface in the radial direction can fit with the other surrounding panel 112 to serve as an insertion guide, thereby effectively reducing the difficulty of assembly between the two shells 11; in addition, the connection structure only needs to protrude inward or outward by the thickness of a plug-in portion 112c, which can effectively improve the utilization rate of the space where the volute is located to release the internal channel size of the volute.

[0049] In addition, by embedding the plug-in portion 112c with another peripheral panel 112 for assembly, the peripheral panel 112 can be positioned according to its overall profile without the need for additional positioning punching sheets or complicated tooling, thereby simplifying the assembly process and reducing gaps remaining after punching sheets.

[0050] Please combine Figure 3 as well as Figure 4 As shown, in some embodiments, the plug-in portion 112c contacts and is fixed to the outer wall of the other peripheral panel 112 along the radial direction of the volute cavity 30 to ensure that the inner wall of the connection position of the two peripheral panels 112 is smooth.

[0051] Please combine Figure 3 as well as Figure 4 As shown, in some embodiments, the height range of the plug-in portion 112c along the axial direction of the volute cavity 30 is 5 mm to 20 mm; it is not difficult to understand that the greater the height of the plug-in portion 112c, the better the sealing performance between the two, the greater the required material cost and the weight of the parts, and vice versa; and controlling the height of the plug-in portion 112c between 5 mm and 20 mm can minimize the material cost and overall quality of the volute while ensuring the sealing performance of the volute body 10.

[0052] Please combine Figure 3 as well as Figure 4 As shown, in some embodiments, the plug-in portion 112 c is welded and fixed to another peripheral panel 112 ; welding and fixing takes up less space and can release space in the internal volute cavity 30 .

[0053] A second aspect of the present application provides a range hood comprising the above-mentioned fan volute.

[0054] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0055] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A fan volute, characterized in that: It comprises a volute body (10) and a volute tongue plate (20), wherein a volute tongue hole (10a) is provided on a side of the volute body (10) close to an outlet, and the volute tongue plate (20) is fixed to the volute body (10) to close the volute tongue hole (10a); The volute body (10) comprises two shells (11), each of the shells (11) comprises a side panel (111) and a peripheral panel (112) perpendicular to the side panel (111), the two peripheral panels (112) are fixed to each other to form a volute cavity (30) inside the two shells (11), and the volute tongue hole (10a) is opened in the peripheral panel (112).

2. The fan volute according to claim 1, characterized in that: The two peripheral panels (112) have the same height along the axial direction of the volute cavity (30), and both peripheral panels (112) are provided with a volute tongue groove (112a), and the two volute tongue grooves (112a) are interconnected to form the volute tongue hole (10a).

3. The fan volute according to claim 2, characterized in that: The height of the position where the volute tongue groove (112a) is formed on the peripheral panel (112) is in the range of 5 mm to 25 mm along the axial direction of the volute cavity (30).

4. The fan volute according to claim 1, characterized in that: The volute tongue plate (20) is welded and fixed to the housing (11) to close the volute tongue hole (10a).

5. The fan volute according to claim 4, characterized in that: One of the peripheral panel (112) and the volute tongue plate (20) is provided with a positioning hole (112b), and the other is provided with a positioning protrusion (21) that can be correspondingly engaged with the positioning hole (112b).

6. The fan volute according to any one of claims 1 to 5, characterized in that: An inserting portion (112c) is fixedly provided at one end of one of the peripheral panels (112) away from the corresponding side panel (111), and the inserting portion (112c) contacts and is fixed to the other peripheral panel (112) along the radial direction of the volute cavity (30).

7. The fan volute according to claim 6, characterized in that: The plug-in portion (112c) contacts and is fixed to the outer wall of the other peripheral panel (112) along the radial direction of the volute chamber (30).

8. The fan volute according to claim 6, characterized in that: The height of the plug-in portion (112c) along the axial direction of the volute cavity (30) ranges from 5 mm to 20 mm.

9. The fan volute according to claim 6, characterized in that: The plug-in portion (112c) is fixed to the other peripheral panel (112) by welding.

10. A range hood, characterized in that: It comprises a fan volute as described in any one of claims 1 to 9.

Images