Volute, fan and extractor hood
Patent Information
- Application Number
- CN202521813796.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-22
- Publication Date
- 2026-08-21
- Estimated Expiration
- 2035-08-22
AI Technical Summary
风机由蜗壳、风轮、进风圈等零件组成，现有方案中，蜗壳通常由蜗壳前板(也称端板)、蜗壳围板和蜗壳后板(也称端板)三部分组成，蜗壳前板和蜗壳围板之间的夹角空间，以及蜗壳后板和蜗壳围板之间的夹角空间容易形成涡流，产生较大的流动撞击损失，从而降低降压和效率，并导致噪声升高
[0018] In this application's technical solution, the surrounding plate and the first end plate have a circular arc transition, as do the second end plate and the surrounding plate. This, to a certain extent, suppresses the generation of eddies in the angled space between the surrounding plate and the first end plate, and in the angled space between the surrounding plate and the second end plate, thereby reducing flow losses, improving the static pressure recovery capability of the volute, and further improving the static pressure and flow efficiency of the fan, while reducing noise. Furthermore, along the spiral expansion direction of the volute, the curvature of the circular arc transition between the surrounding plate and the first end plate gradually decreases, as does the curvature of the circular arc transition between the surrounding plate and the second end plate. Thus, the curvature of the circular arc transition tends to be gentler along the spiral expansion direction of the volute, which helps to further reduce the generation of eddies in the angled space between the surrounding plate and the first end plate, and in the angled space between the surrounding plate and the second end plate.
Smart Images
Figure CN224664895U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of range hood technology, and in particular to a volute, a fan, and a range hood. Background Technology
[0002] Range hoods are essential appliances for kitchen ventilation, and the fan is the core power component that determines the range hood's performance levels, including airflow, static pressure, noise, and efficiency. The fan consists of parts such as the volute, impeller, and air inlet ring. In existing designs, the volute typically comprises three parts: the front plate (also called the end plate), the surrounding plate, and the rear plate (also called the end plate). The angles between the front and surrounding plates, and between the rear and surrounding plates, easily create eddies, resulting in significant flow impact losses, reduced pressure drop and efficiency, and increased noise. Utility Model Content
[0003] This application aims to at least partially solve one of the technical problems in the related art. To this end, this application proposes a volute.
[0004] To achieve the above objectives, this application discloses a volute, the volute comprising:
[0005] First end plate;
[0006] Second end plate; and
[0007] A surrounding plate is disposed between the first end plate and the second end plate, and the surrounding plate and the first end plate have a circular arc transition. Along the spiral expansion direction of the volute, the curvature of the circular arc transition portion between the surrounding plate and the first end plate gradually decreases.
[0008] In some embodiments of this application, the arc transition portion between the enclosure and the first end plate includes n first transition curves connecting the enclosure and the first end plate. The n first transition curves are arranged sequentially along the spiral expansion direction of the volute, and the arc length gradually increases.
[0009] In some embodiments of this application, the connection points of the n first transition curves to the first end plate are located in the same plane perpendicular to the central axis of the volute.
[0010] In some embodiments of this application, the radius of curvature of the first transition curve is 3mm to 50mm.
[0011] In some embodiments of this application, the arc transition portion between the enclosure and the second end plate includes n second transition curves connecting the enclosure and the second end plate. The n second transition curves are arranged sequentially along the spiral expansion direction of the volute, and the arc length gradually increases.
[0012] In some embodiments of this application, the connection points of the n second transition curves to the second end plate are located in the same plane perpendicular to the central axis of the volute.
[0013] In some embodiments of this application, the radius of curvature of the second transition curve is 3mm to 50mm.
[0014] In some embodiments of this application, the arc transition portion between the enclosure and the first end plate, and the arc transition portion between the enclosure and the second end plate, are either mirror-symmetric or non-mirror-symmetric with respect to the enclosure.
[0015] In some embodiments of this application, the enclosure includes a first enclosure and a second enclosure arranged along the axial direction of the volute, wherein the first enclosure and the first end plate are integrally formed, the second enclosure and the second end plate are integrally formed, and the first enclosure and the second enclosure are connected.
[0016] A second aspect of this application discloses a fan comprising the aforementioned volute.
[0017] A third aspect of this application discloses a range hood, which includes the aforementioned fan.
[0018] In this application's technical solution, the surrounding plate and the first end plate have a circular arc transition, as do the second end plate and the surrounding plate. This, to a certain extent, suppresses the generation of eddies in the angled space between the surrounding plate and the first end plate, and in the angled space between the surrounding plate and the second end plate, thereby reducing flow losses, improving the static pressure recovery capability of the volute, and further improving the static pressure and flow efficiency of the fan, while reducing noise. Furthermore, along the spiral expansion direction of the volute, the curvature of the circular arc transition between the surrounding plate and the first end plate gradually decreases, as does the curvature of the circular arc transition between the surrounding plate and the second end plate. Thus, the curvature of the circular arc transition tends to be gentler along the spiral expansion direction of the volute, which helps to further reduce the generation of eddies in the angled space between the surrounding plate and the first end plate, and in the angled space between the surrounding plate and the second end plate.
[0019] Other advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description or may be learned by practice of this application. Attached Figure Description
[0020] To more clearly illustrate the technical solutions in the embodiments of this application 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 only some embodiments of this application. For those skilled in the art, other designs can be obtained based on the structures shown in these drawings without creative effort.
[0021] Figure 1 Schematic diagram of the volute in some embodiments;
[0022] Figure 2 for Figure 1 The volute shown illustrates graphic X (see red portion);
[0023] Figure 3 This is a second schematic diagram of the volute in some embodiments;
[0024] Figure 4 for Figure 3 The volute shown illustrates a figure Y (see red portion);
[0025] Figure 5 This is a third schematic diagram of the volute in some embodiments;
[0026] Figure 6 Cross-sectional views of the volute in some embodiments (partial view shown);
[0027] Figure 7 An exploded view of the volute in some embodiments.
[0028] Explanation of icon numbers:
[0029] The volute 10 includes a first end plate 100, a second end plate 200, a surrounding plate 300, a first surrounding plate 310, a second surrounding plate 320, a first transition curve 410, a second transition curve 420, an air inlet 510, and an air outlet 520.
[0030] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0032] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0033] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0034] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.
[0035] The first aspect of this application discloses a volute 10, which, in some embodiments, is combined with Figure 1 , Figure 3 Figure 5 ,and Figure 6 As shown, the volute 10 includes a first end plate 100, a second end plate 200, and a surrounding plate 300. The surrounding plate 300 is disposed between the first end plate 100 and the second end plate 200, and there is an arc transition between the surrounding plate 300 and the first end plate 100, and an arc transition between the surrounding plate 300 and the second end plate 200. Along the spiral expansion direction of the volute 10, the arc transition portion between the surrounding plate 300 and the first end plate 100 (see...) Figure 1 The curvature of the marked I) gradually decreases, and the arc transition between the surrounding plate 300 and the second end plate 200 (see...) Figure 3 The curvature of mark II in the middle gradually decreases.
[0036] The following section provides a detailed description of the fan, which includes a volute 10, a rotor, and a motor. The volute 10 is a component for gas collection and energy conversion, used for mounting the impeller. In this embodiment, the volute 10 includes a first end plate 100, a second end plate 200, and a surrounding plate 300. The surrounding plate 300 is disposed between the first end plate 100 and the second end plate 200. The first end plate 100, the surrounding plate 300, and the second end plate 200 enclose a cavity for mounting the impeller. Furthermore, the first end plate 100, the surrounding plate 300, and the second end plate 200 also enclose an air outlet 520 that communicates with the cavity. The first end plate 100 is provided with an air inlet 510, or the second end plate 200 is provided with an air inlet 510, or both the first end plate 10 and the second end plate 200 are provided with air inlets 510. The impeller is connected to a motor, and the motor drives the impeller to rotate. When the impeller rotates, the airflow enters the interior (cavity) of the volute 10 from the air inlet 510 and is discharged from the air outlet 520.
[0037] In related technologies, the volute includes a front plate (equivalent to the first end plate 100 or the second end plate 200 in this application), a rear plate (equivalent to the second end plate 200 or the first end plate 100 in this application), and a surrounding plate. The surrounding plate is disposed between the front plate and the rear plate. When the impeller rotates, the airflow enters the interior of the volute from the air inlet and exits from the air outlet. When the airflow flows from the air inlet toward the air outlet, eddies are generated in the angle space between the front plate and the surrounding plate, and in the angle space between the rear plate and the surrounding plate, resulting in a large flow impact loss.
[0038] Therefore, in this embodiment, there is a circular arc transition between the first end plate 100 and the surrounding plate 300, and between the second end plate 200 and the surrounding plate 300. This circular arc transition means that a smooth transition between the two objects is achieved through at least one curved surface or curved surface structure, thereby avoiding sharp corners or protruding edges. This arrangement, to a certain extent, suppresses the generation of eddies in the included angle space between the first end plate 100 and the surrounding plate 300, and in the included angle space between the second end plate 200 and the surrounding plate 300. This reduces flow losses, improves the static pressure recovery capability of the volute 10, and thus improves the static pressure and flow efficiency of the fan, while reducing noise.
[0039] It is understandable that, along the spiral expansion direction of the volute 10, the cross-section of the flow channel between the enclosure plate 300 and the impeller gradually increases. Under the premise that the fan flow rate remains unchanged, the airflow velocity will gradually decrease. Low flow velocity makes it easier to generate vortices in the angle space between the first end plate 100 and the enclosure plate 300 and the angle space between the second end plate 200 and the enclosure plate 300. Therefore, in this embodiment, along the spiral expansion direction of the volute 10, the curvature of the arc transition portion between the enclosure plate 300 and the first end plate 100 gradually decreases, and the curvature of the arc transition portion between the enclosure plate 300 and the second end plate 200 gradually decreases. The curvature gradually decreases means that it tends to be gentle (still curved), which can further suppress the formation of vortices in the angle space between the enclosure plate 300 and the first end plate 100 and the angle space between the enclosure plate 300 and the second end plate 200, thereby further improving the overall performance of the fan. The spiral expansion direction can be understood as the spiral extension direction of the enclosure 300 from one side of the air outlet 520 to the other side of the air outlet 520. One side of the air outlet 520 refers to the side closer to the volute tongue, while the other side is relatively far away from the volute tongue.
[0040] Along the spiral expansion direction of the volute 10, the degree of curvature of the arc transition portion between the surrounding plate 300 and the first end plate 100 gradually decreases, which can be understood as follows: (Combined with...) Figure 1 As shown, the arc transition portion between the enclosure 300 and the first end plate 100 includes n first transition curves 410 connecting the enclosure 300 and the first end plate 100. The n first transition curves 410 are arranged sequentially along the spiral expansion direction of the volute 10, and the radius of curvature gradually increases.
[0041] The arc transition between the enclosure 300 and the first end plate 100 is shown below. Figure 1 Mark I in the figure, the first transition curve 410 is shown. Figure 1The curves A11A12 and n first transition curves 410 have curvature radii of R11, R12, R13, R14, R15…R1n, satisfying R11<R12<R13<R14<R15<…<R1n. By setting them in this way, the curvature radii of the n first transition curves 410 gradually increase along the spiral expansion direction of the volute 10. This makes the curvature of the arc transition portion between the surrounding plate 300 and the first end plate 100 gradually decrease, and the gradual change of the arc transition portion between the surrounding plate 300 and the first end plate 100 along the spiral expansion direction of the volute 10 becomes more natural, which is more conducive to reducing the formation of vortices in the included angle space between the surrounding plate 300 and the first end plate 100. It is understandable that the radius of curvature of the first transition curve 410 refers to the radius of curvature at a certain point of the first transition curve 410. That is, among two adjacent first transition curves 410, along the spiral expansion direction of the volute 10, the radius of curvature at any point of the first transition curve 410 on the upstream side is smaller than the radius of curvature at any point of the first transition curve 410 on the downstream side.
[0042] Optionally, the radius of curvature of the first transition curve 410 is 3mm to 50mm. For example, the radius of curvature of the first transition curve 410 is 3mm, 10mm, 15mm, 25mm, 35mm, 40mm, 45mm or 50mm. In this way, the manufacturing of the arc transition portion between the surrounding plate 300 and the first end plate 100 can be guaranteed, avoiding manufacturing difficulties due to excessive size, and the internal flow area of the volute 10 will not be reduced too much compared to a right angle.
[0043] Similarly, along the spiral expansion direction of the volute 10, the degree of curvature of the arc transition portion between the surrounding plate 300 and the second end plate 200 gradually decreases, which can be understood as follows: (Combined with...) Figure 3 As shown, the arc transition portion between the enclosure plate 300 and the second end plate 200 includes n second transition curves 420 connecting the enclosure plate 300 and the second end plate 200. The n second transition curves 420 are arranged sequentially along the spiral expansion direction of the volute 10, and the radius of curvature gradually increases.
[0044] The arc transition between the enclosure 300 and the second end plate 200 is shown below. Figure 3 Mark II in the middle, the second transition curve 420 is shown. Figure 3The radii of curvature of the curves A21 and A22, and the n second transition curves 420 are R21, R22, R23, R24, R25…R2n, respectively, satisfying R21<R22<R23<R24<R25<…<R2n. By setting them in this way, the radii of curvature of each of the n second transition curves 420 gradually increase along the spiral expansion direction of the volute 10. This makes the curvature of the arc transition portion between the surrounding plate 300 and the second end plate 200 gradually decrease, and the gradual change of the arc transition portion between the surrounding plate 300 and the second end plate 200 along the spiral expansion direction of the volute 10 becomes more natural, which is more conducive to reducing the formation of vortices in the included angle space between the surrounding plate 300 and the second end plate 200. It is understandable that the radius of curvature of the second transition curve 420 refers to the radius of curvature at a certain point of the second transition curve 420. That is, among two adjacent second transition curves 420, along the spiral expansion direction of the volute 10, the radius of curvature at any point of the upstream second transition curve 420 is smaller than the radius of curvature at any point of the downstream second transition curve 420.
[0045] Optionally, the radius of curvature of the second transition curve 420 is 3mm to 50mm. For example, the radius of curvature of the second transition curve 420 is 3mm, 10mm, 15mm, 25mm, 35mm, 40mm, 45mm or 50mm. In this way, the manufacturing of the arc transition part between the surrounding plate 300 and the second end plate 200 can be guaranteed, avoiding manufacturing difficulties due to excessive size, and the internal flow area of the volute 10 will not be reduced too much compared to a right angle.
[0046] In some embodiments, combined with Figure 1 As shown, the arc transition portion between the enclosure 300 and the first end plate 100 includes n first transition curves 410 connecting the enclosure 300 and the first end plate 100. The n first transition curves 410 are arranged sequentially along the spiral expansion direction of the volute 10, and the arc length gradually increases.
[0047] As can be seen from the above, along the spiral expansion direction of the volute 10, the curvature of the arc transition section between the surrounding plate 300 and the first end plate 100 gradually decreases. Based on this, n first transition curves 410 are sequentially arranged along the spiral expansion direction of the volute 10, and the arc length gradually increases. That is, the curvature range of the n first transition curves 410 along the spiral expansion direction of the volute 10 gradually increases. This makes the transition between the surrounding plate 300 and the arc transition section I smoother, the transition between the first end plate 100 and the arc transition section I smoother, and the included angle space between the surrounding plate 300 and the first end plate 100 gradually increases. The flow of low-speed airflow in the arc transition section I is smoother, further reducing the generation of vortices and improving overall performance.
[0048] Optionally, in some embodiments, combined with Figure 1 and Figure 2 As shown, the connection points of the n first transition curves 410 to the first end plate 100 are located on the same plane perpendicular to the central axis of the volute 10 (the central axis of the volute 10 is the central axis of the impeller). The connection points of the first transition curves 410 to the first end plate 100 are shown in the figure. Figure 1 At point A12, as n approaches infinity, the connection points of the n first transition curves 410 to the first end plate 100 form a shape X. This shape X is located in a plane perpendicular to the central axis of the volute 10, thus reducing the manufacturing difficulty of the arc transition part I. Since the n first transition curves 410 are arranged sequentially along the spiral expansion direction of the volute 10 and the arc length gradually increases, and the connection points of the n first transition curves 410 to the first end plate 100 are located in the same plane perpendicular to the central axis of the volute 10, the arc transition part I only expands towards the surrounding plate 300, without needing to expand towards both the location of the first end plate 100 and the location of the surrounding plate 300. This allows for better control of variables and reduces the manufacturing difficulty of the volute 10.
[0049] Similarly, in some embodiments, combined with Figure 3 As shown, the arc transition portion between the enclosure plate 300 and the second end plate 200 includes n second transition curves 420 connecting the enclosure plate 300 and the second end plate 200. The n second transition curves 420 are arranged sequentially along the spiral expansion direction of the volute 10, and the arc length gradually increases.
[0050] As can be seen from the above, along the spiral expansion direction of the volute 10, the curvature of the arc transition section between the surrounding plate 300 and the second end plate 200 gradually decreases. Based on this, n second transition curves 420 are sequentially arranged along the spiral expansion direction of the volute 10, and the arc length gradually increases. That is, the curvature range of the n second transition curves 420 along the spiral expansion direction of the volute 10 gradually increases. This makes the transition between the surrounding plate 300 and the arc transition section II smoother, the transition between the second end plate 200 and the arc transition section II smoother, and the angle space between the surrounding plate 300 and the second end plate 200 gradually increases. The flow of low-speed airflow in the arc transition section II is smoother, further reducing the generation of vortices and improving overall performance.
[0051] Optionally, in some embodiments, combined with Figure 3 and Figure 4 As shown, the connection points of the n second transition curves 420 to the second end plate 200 are located on the same plane perpendicular to the central axis of the volute 10. The connection points of the second transition curves 420 to the second end plate 200 are shown in the figure. Figure 3At point A22, as n approaches infinity, the connection points of the n second transition curves 420 to the second end plate 200 form a shape Y. This shape Y is located in a plane perpendicular to the central axis of the volute 10, thus reducing the manufacturing difficulty of the arc transition part II. Since the n second transition curves 420 are arranged sequentially along the spiral expansion direction of the volute 10 and the arc length gradually increases, and the connection points of the n second transition curves 420 to the second end plate 200 are located in the same plane perpendicular to the central axis of the volute 10, the arc transition part II only expands towards the surrounding plate 300, without needing to expand towards both the location of the second end plate 200 and the location of the surrounding plate 300. This allows for better control of variables and reduces the manufacturing difficulty of the volute 10.
[0052] In some embodiments, combined with Figure 6 As shown, the arc transition portion between the enclosure plate 300 and the first end plate 100, and the arc transition portion between the enclosure plate 300 and the second end plate 200, are mirror-symmetrical about the enclosure plate 300. This helps to reduce manufacturing difficulty, and the mirror-symmetrical setting can reduce the problem of eddy current generation caused by uneven flow, reduce energy loss, and ensure the stable operation of the fan.
[0053] Of course, in other embodiments, the arc transition portion between the enclosure 300 and the first end plate 100 may be non-mirror symmetrical with respect to the arc transition portion between the enclosure 300 and the second end plate 200.
[0054] In some embodiments, combined with Figure 1 and Figure 7 As shown, the enclosure 300 includes a first enclosure 310 and a second enclosure 320 arranged along the axial direction of the volute 10 (the axial direction of the volute 10 is the axial direction of the impeller). The first enclosure 310 and the first end plate 100 are integrally formed, the second enclosure 320 and the second end plate 200 are integrally formed, and the first enclosure 310 and the second enclosure 320 are connected.
[0055] One-piece molding refers to the process of manufacturing a product using a single molding technique. Taking the one-piece molding of the first enclosure plate 310 and the first end plate 100 as an example, it can be manufactured using plastic. Molten plastic is injected into a mold, and after the molten plastic solidifies, a structure is formed where the first enclosure plate 310 and the first end plate 100 are integrated, with a rounded transition between them. Alternatively, the one-piece molding of the first enclosure plate 310 and the first end plate 100 can also be achieved using metal and machined using techniques such as cutting, drilling, stretching, and stamping.
[0056] In related technologies, the front plate, rear plate, and side plates need to be connected and assembled together. In this embodiment, the first side plate 310 and the first end plate 100 are integrally formed, and the second side plate 320 and the end plate are integrally formed. The first side plate 310 and the second side plate 320 are connected, which not only reduces the number of parts but also reduces the number of assembly connections. This helps to simplify the structure of the volute 10, improve the manufacturing convenience of the volute 10, and also improve the overall structural strength of the volute 10. It is understood that there are various ways to connect the first side plate 310 and the second side plate 320, including but not limited to riveting, screwing, welding, fusion, etc., as long as the first side plate 310 and the second side plate 320 can be fixed together.
[0057] In some embodiments, the axial dimension of the first enclosure 310 is not less than 0.3 times the axial dimension of the enclosure 300, and the axial dimension of the second enclosure 320 is not less than 0.3 times the axial dimension of the enclosure 300. The so-called axial direction is the direction of extension of the central axis of the volute 10. For example, the axial dimension of the first enclosure 310 is equal to the axial dimension of the second enclosure 320.
[0058] If the axial dimension of either the first enclosure plate 310 or the second enclosure plate 320 is too large, a larger cavity will be formed, making it difficult to process and shape. In this embodiment, by improving the axial dimensions of the first enclosure plate 310 and the second enclosure plate 320, the axial dimension of either the first enclosure plate 310 or the second enclosure plate 320 is prevented from becoming too large, thereby making it more conducive to the integral molding manufacturing of the first enclosure plate 310 and the first end plate 100, as well as the integral molding manufacturing of the second enclosure plate 320 and the second end plate 200.
[0059] The second aspect of this application discloses a fan. In some embodiments, the fan includes the aforementioned volute 10, with a fan impeller disposed within the volute 10. The fan motor is connected to the fan impeller. The volute 10 includes a first end plate 100, a second end plate 200, and a surrounding plate 300. The surrounding plate 300 is disposed between the first end plate 100 and the second end plate 200, and there is an arc transition between the surrounding plate 300 and the first end plate 100, and an arc transition between the surrounding plate 300 and the second end plate 200. Along the spiral expansion direction of the volute 10, the curvature of the arc transition portion between the surrounding plate 300 and the first end plate 100 gradually decreases, and the curvature of the arc transition portion between the surrounding plate 300 and the second end plate 200 gradually decreases.
[0060] The arc transitions between the enclosure plate 300 and the first end plate 100, and between the enclosure plate 300 and the second end plate 200, effectively suppress vortex generation in the angled space between the enclosure plate 300 and the first end plate 100, as well as in the angled space between the enclosure plate 300 and the second end plate 200. This reduces flow losses, improves the static pressure recovery capability of the volute 10, and consequently enhances the static pressure and flow efficiency of the fan, while reducing noise. Furthermore, along the spiral expansion direction of the volute 10, the curvature of the arc transition portions between the enclosure plate 300 and the first end plate 100 gradually decreases, as does the curvature of the arc transition portions between the enclosure plate 300 and the second end plate 200. This makes the curvature of the arc transition portions more gradual along the spiral expansion direction of the volute 10, further reducing vortex generation in the angled space between the enclosure plate 300 and the first end plate 100, and in the angled space between the enclosure plate 300 and the second end plate 200. It is understood that the volute 10 of the fan in this embodiment adopts the technical solution of the above embodiment, and therefore has at least the beneficial effects brought about by the technical solution of the above embodiment, which will not be repeated here.
[0061] The third aspect of this application discloses a range hood. In some embodiments, the range hood includes the aforementioned fan. The fan of the range hood in this embodiment adopts the technical solution of the aforementioned embodiment, and therefore has at least the beneficial effects brought about by the technical solution of the aforementioned embodiment, which will not be repeated here.
[0062] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.
Claims
1. A volute (10), characterized in that, The volute (10) includes: First end plate (100); Second end plate (200); and A surrounding plate (300) is disposed between the first end plate (100) and the second end plate (200), and the surrounding plate (300) and the first end plate (100) have a circular arc transition. The circular arc transition between the surrounding plate (300) and the second end plate (200) gradually decreases along the spiral expansion direction of the volute (10).
2. The volute (10) as described in claim 1, characterized in that, The arc transition portion between the enclosure plate (300) and the first end plate (100) includes n first transition curves (410) connecting the enclosure plate (300) and the first end plate (100). The n first transition curves (410) are arranged sequentially along the spiral expansion direction of the volute (10), and the arc length gradually increases.
3. The volute (10) as described in claim 2, characterized in that, The connection points of the n first transition curves (410) to the first end plate (100) are located in the same plane perpendicular to the central axis of the volute (10).
4. The volute (10) as described in claim 2, characterized in that, The radius of curvature of the first transition curve (410) is 3mm to 50mm.
5. The volute (10) as described in claim 1, characterized in that, The arc transition portion between the enclosure plate (300) and the second end plate (200) includes n second transition curves (420) connecting the enclosure plate (300) and the second end plate (200). The n second transition curves (420) are arranged sequentially along the spiral expansion direction of the volute (10), and the arc length gradually increases.
6. The volute (10) as described in claim 5, characterized in that, The connection points of the n second transition curves (420) to the second end plate (200) are located in the same plane perpendicular to the central axis of the volute (10).
7. The volute (10) as described in claim 5, characterized in that, The radius of curvature of the second transition curve (420) is 3mm to 50mm.
8. The volute (10) as claimed in claim 1, characterized in that, The arc transition portion between the enclosure (300) and the first end plate (100) and the arc transition portion between the enclosure (300) and the second end plate (200) are either mirror-symmetric or non-mirror-symmetric about the enclosure (300).
9. The volute (10) as claimed in claim 1, characterized in that, The enclosure (300) includes a first enclosure (310) and a second enclosure (320) arranged along the axial direction of the volute (10). The first enclosure (310) and the first end plate (100) are integrally formed, and the second enclosure (320) and the second end plate (200) are integrally formed. The first enclosure (310) and the second enclosure (320) are connected.
10. A fan, characterized in that, The fan includes the volute (10) as described in any one of claims 1 to 9.
11. A range hood, characterized in that, The range hood includes the fan as described in claim 10.