Volute structure, fan and range hood

Abstract

The utility model provides a volute structure, fan and range hood belongs to range hood equipment technical field. Volute structure includes front cover, back cover, ring wall, front air -guide ring and rear air -guide ring, the front cover is set up with the front air inlet, the back cover is set up with rear air inlet, the ring wall is connected between the front cover and back cover, the front air -guide ring is installed in the front air inlet, and the front air -guide ring includes annular air -guide portion and sets up the installation portion in annular air -guide portion outer edge, and the longitudinal section of annular air -guide portion includes the oblique line segment and the front circular arc segment that connect with each other, and the front circular arc segment extends along the air inlet direction of front air inlet, the rear air -guide ring is connected in rear air inlet, and the longitudinal section of rear air -guide ring includes rear circular arc segment, and rear circular arc segment extends along the air inlet direction of rear air inlet. By oblique line segment and circular arc segment to make the front air -guide ring air -guide more smooth, avoid the vortex that produces in volute structure, and then reduce the noise, and because the wind along oblique line segment and circular arc segment smooth flow to the volute, greatly reduce the wind loss.

Description

Technical Field

[0001] This utility model belongs to the technical field of range hood equipment, specifically relating to a volute structure, a fan, and a range hood. Background Technology

[0002] With changes in people's living environment and improvements in their quality of life, the requirements for range hoods are also increasing. Household range hoods mostly use centrifugal fans for air intake and exhaust. A centrifugal fan generally consists of a volute, a motor, and an impeller. When the range hood is drawing in air, the air enters the volute through the inlet and is then exhausted through the outlet.

[0003] In existing technologies, a guide ring is usually installed at the air inlet of the volute to guide the fumes into the volute. However, the existing guide ring is generally in the form of a circular arc surface. When the fumes enter the volute from this circular arc surface, some of the airflow tends to deviate from the air intake direction at the edge of the circular arc surface, making the air intake of the guide ring not smooth enough and generating noise. Utility Model Content

[0004] In view of the problems existing in the prior art, the primary objective of this utility model is to provide a volute structure, and the technical problem to be solved is: how to achieve smoother air intake and reduce noise in the fan.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A volute structure, comprising:

[0007] Front cover, wherein the front cover is provided with an air inlet;

[0008] Rear cover plate, wherein the rear cover plate is provided with a rear air inlet;

[0009] A ring wall, the ring wall being connected between the front cover plate and the rear cover plate;

[0010] A front air guide ring is installed on the front air inlet. The front air guide ring includes an annular air guide portion and a mounting portion disposed on the outer edge of the annular air guide portion. The longitudinal section of the annular air guide portion includes an interconnected oblique line segment and a front arc segment. The front arc segment extends along the air intake direction of the front air inlet.

[0011] A rear air guide ring is connected to the rear air inlet. The longitudinal section of the rear air guide ring includes a rear arc segment, which extends along the air intake direction of the rear air inlet.

[0012] In the aforementioned volute structure, the front arc segment includes a first arc and a second arc. One side of the first arc is connected to the oblique line segment, and the second arc is connected to the side of the first arc away from the oblique line segment. Furthermore, the oblique line segment is tangent to the first arc, and the first arc is tangent to the second arc.

[0013] In one of the aforementioned volute structures, the radius of the first arc is r1, 12mm≤r1≤18mm; the radius of the second arc is r2, 3mm≤r2≤5mm.

[0014] In the aforementioned volute structure, the oblique segment is inclined and tilted upwards toward the front air inlet; the angle between the oblique segment and the horizontal line is α, where 170°≤α≤175°.

[0015] In the aforementioned volute structure, the mounting portion includes a connecting section and a bending section. One side of the connecting section is connected to the side of the inclined line segment away from the first arc. The bending section is connected to the side of the connecting section away from the inclined line segment. The bending section bends toward the air intake direction of the forward air inlet.

[0016] In the aforementioned volute structure, the connecting section is provided with a plurality of mounting holes, which are evenly and spaced apart on the connecting section.

[0017] In the aforementioned volute structure, the bending segment, the connecting segment, the oblique segment, the first arc, and the second arc are sequentially connected to form a single unit.

[0018] The second objective of this utility model is to provide a fan:

[0019] A fan, comprising:

[0020] In the aforementioned volute structure, the front cover plate, the annular wall, and the rear cover plate enclose and form a volute cavity;

[0021] An impeller is installed inside the volute cavity.

[0022] In one of the aforementioned fan types, the distance from the free end of the rear guide ring to the side of the impeller is i1, where 2mm ≤ i1 ≤ 4mm; and the distance from the free end of the rear guide ring to the end face of the impeller is i2, where 2mm ≤ i2 ≤ 3mm.

[0023] The third objective of this utility model is to provide a range hood:

[0024] A range hood, including the aforementioned fan.

[0025] The beneficial effects of this utility model are:

[0026] The volute structure of this invention uses oblique and arc segments to make the airflow of the front guide ring smoother, avoids the generation of vortices in the volute structure, and thus reduces noise; and because the air flows smoothly into the volute along the oblique and arc segments, wind loss is greatly reduced.

[0027] In this embodiment, the fan, through the front and rear guide rings of the volute structure, ensures smoother air intake, reduces noise, and greatly improves the user experience of the fan when air is drawn in.

[0028] The range hood of this invention ensures smoother air intake and reduces fan noise, thereby improving the smoke extraction effect and reducing noise, thus enhancing the overall performance and user experience of the range hood. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the volute structure;

[0030] Figure 2 A schematic diagram of the volute structure from another perspective;

[0031] Figure 3 This is a schematic diagram of the structure of the front guide vane;

[0032] Figure 4 This is a cross-sectional view of the front guide vane;

[0033] Figure 5 for Figure 4 Enlarged view of section A in the middle;

[0034] Figure 6 This is a schematic diagram of the fan structure;

[0035] Figure 7 This is a cross-sectional view of the fan;

[0036] Figure 8 for Figure 7 Enlarged view of section B in the middle.

[0037] In the diagram, 100 is the volute structure; 110 is the front cover plate; 111 is the front air inlet; 120 is the rear cover plate; 121 is the rear air inlet; 130 is the annular wall; 140 is the front air guide ring; 141 is the annular air guide section; 1411 is the oblique line segment; 1412 is the front arc segment; 1413 is the first arc; 1414 is the second arc; 142 is the mounting part; 1421 is the connecting section; 1422 is the bending section; 1423 is the mounting hole; 150 is the rear air guide ring; 151 is the rear arc segment; 160 is the volute cavity; and 200 is the impeller. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment 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.

[0040] Example 1:

[0041] It should be noted that the volute in this embodiment can be applied to a fan, which can be applied to a smoke hood. Of course, it can also be used in other wind power systems that require the duct structure formed by this volute. The following description takes the specific construction of the volute structure 100 in the fan as an example, but it is not limited thereto.

[0042] like Figure 1-5 As shown in Figure 7, this embodiment provides a volute structure 100, including a front cover plate 110, a rear cover plate 120, an annular wall 130, a front air guide ring 140, and a rear air guide ring 150; the front cover plate 110 has a front air inlet 111; the rear cover plate 120 has a rear air inlet 121; the annular wall 130 connects the front cover plate 110 and the rear cover plate 120; the front air guide ring 140 is installed at the front air inlet 111, and the front air guide ring 140 includes an annular air guide portion. 141 and a mounting portion 142 disposed on the outer edge of the annular air guide portion 141, wherein the longitudinal section of the annular air guide portion 141 includes an interconnected oblique line segment 1411 and a front arc segment 1412, the front arc segment 1412 extending along the air intake direction of the front air inlet 111; the rear air guide ring 150 is connected to the rear air inlet 121, and the longitudinal section of the rear air guide ring 150 includes a rear arc segment 151, the rear arc segment 151 extending along the air intake direction of the rear air inlet 121.

[0043] In this embodiment, the volute structure 100 includes a front cover plate 110, a rear cover plate 120, and an annular wall 130. The front cover plate 110, the annular wall 130, and the rear cover plate 120 enclose a volute cavity 160. An impeller 200 structure is installed inside the volute cavity 160, which constitutes a fan. An air outlet is formed at the free end of the annular wall 130. The free ends of the annular wall 130 are the two ends along its length. The two sides of the annular wall 130 are connected to the front cover plate 110 and the rear cover plate 120, and the two ends of the annular wall 130 are connected to the front cover plate 110 and the rear cover plate 120. The cover plate 120 forms an air outlet; the front cover plate 110 has a front air inlet 111, and the rear cover plate 120 has a rear air inlet 121. It can be understood that the front air inlet 111 is the main air inlet, and the rear air inlet 121 is the secondary air inlet. That is, the air in the volute is mainly drawn in through the front air inlet 111, and of course, some air will also enter through the rear air inlet 121. The air enters the volute cavity 160 formed by the front cover plate 110, the annular wall 130, and the rear cover plate 120 from the front air inlet 111 and the rear air inlet 121, and is then blown out from the air outlet.

[0044] In this embodiment, the front air guide ring 140 includes an annular air guide portion 141 and a mounting portion 142 disposed on the outer edge of the annular air guide portion 141. The longitudinal section of the annular air guide portion 141 includes an interconnected oblique line segment 1411 and a front arc segment 1412. The front arc segment 1412 extends along the air intake direction of the front air inlet 111. The front air guide ring 140 can be mounted on the front cover plate 110 of the volute through the mounting portion 142. An air guide port is formed inside the annular air guide portion 141. When the front air guide ring 140 is mounted on the front air inlet 111 of the front cover plate 110, the air guide port and the front air inlet 111 of the front cover plate 110 are connected. It can also be understood that the front air inlet 111 coincides with the air guide port of the front air guide ring 140. The air intake direction of the front air inlet 111 is the direction from the front air guide ring 140 toward the interior of the volute structure 100. Since the longitudinal section of the annular air guide 141 includes an interconnected oblique line segment 1411 and an arc segment, the oblique line segment 1411 is connected to the mounting part 142, and the arc segment extends along the air inlet direction of the air guide. When the fan is working, the air first flows along the oblique line segment 1411, then smoothly transitions to the arc segment, and is then guided into the volute cavity 160 of the volute structure 100 through the arc segment. In this way, the air guide of the front air guide ring 140 is smoother through the oblique line segment 1411 and the arc segment, avoiding the generation of vortices in the volute structure 100, thereby reducing noise. Furthermore, since the air flows smoothly into the volute along the oblique line segment 1411 and the arc segment, wind loss is greatly reduced. The longitudinal section of the rear air guide ring 150 includes a rear arc segment 151, which extends along the air intake direction of the rear air inlet 121. The air intake direction of the rear air inlet 121 is from the rear air inlet 121 toward the volute cavity 160 of the volute structure 100. The rear air inlet 121 serves as a secondary air inlet, and the rear arc segment 151 ensures smooth air intake from the rear air inlet 121.

[0045] like Figure 4 and 5 As shown, the front arc segment 1412 includes a first arc 1413 and a second arc 1414. One side of the first arc 1413 is connected to the oblique line segment 1411, and the second arc 1414 is connected to the side of the first arc 1413 away from the oblique line segment 1411. The oblique line segment 1411 is tangent to the first arc 1413, and the first arc 1413 is tangent to the second arc 1414.

[0046] In this embodiment, the arc segment includes a first arc 1413 and a second arc 1414, wherein the first arc 1413 is a larger arc and the second arc 1414 is a smaller arc. The wind flows through the oblique segment 1411 first through the larger arc, i.e., the first arc 1413, thus guiding the wind to the inlet 111 first, and then through the smaller arc, i.e., the second arc 1414, to guide the wind to a deeper depth. In this volute structure 100, the wind is guided to the interior of the volute structure 100 through the second arc 1414, so that the airflow is smoother, wind loss is reduced, and vortices are prevented from forming at the inlet 111 of the volute structure 100, resulting in less noise.

[0047] like Figure 4 and 5 As shown, the radius of the first arc 1413 is r1, 12mm≤r1≤18mm; the radius of the second arc 1414 is r2, 3mm≤r2≤5mm.

[0048] In this embodiment, the radius r1 of the first arc 1413 is in the range of 12-18mm, and the radius r2 of the second arc 1414 is in the range of 3-5mm. By limiting the radii of the first arc 1413 and the second arc 1414, the wind is guided to a deeper depth, ensuring smoother airflow.

[0049] like Figure 4 and 5 As shown, the oblique line segment 1411 is inclined and tilted towards the upper part of the front air inlet 111; the angle between the oblique line segment 1411 and the horizontal line is α, 170°≤α≤175°.

[0050] In this embodiment, the oblique segment 1411 slopes upward toward the front air inlet 111, and combined with the arc segment extending along the air intake direction of the front air inlet 111, during air guidance, the air first flows slightly upward, and then flows through the arc segment into the interior of the front air inlet 111. This results in a smoother airflow trajectory, thus ensuring smoother air guidance. Furthermore, by limiting the angle α between the oblique segment 1411 and the horizontal line to 170°-175°, it is ensured that the oblique segment 1411 slopes slightly upward toward the front air inlet 111, thereby ensuring smoother air guidance.

[0051] like Figure 4 and 5 As shown, the mounting part 142 includes a connecting section 1421 and a bending section 1422. One side of the connecting section 1421 is connected to the side of the oblique line segment 1411 away from the first arc 1413. The bending section 1422 is connected to the side of the connecting section 1421 away from the oblique line segment 1411. The bending section 1422 bends toward the air intake direction of the front air inlet 111.

[0052] In this embodiment, the front air guide ring 140 is installed on the front air inlet 111 of the front cover plate 110 by the mounting part 142. The bending section 1422 bends towards the air intake direction of the front air inlet 111, that is, the bending part bends towards the front cover plate 110 of the volute structure 100, so that the bending part is in close contact with the front cover plate 110, ensuring that the front air guide ring 140 is installed tightly.

[0053] like Figure 1 and 3 As shown, the connecting segment 1421 is provided with a plurality of mounting holes 1423, which are evenly and spaced apart on the connecting segment 1421.

[0054] In this embodiment, a fixed connection between the connecting section 1421 and the front cover plate 110 is achieved by screwing in a fastening screw at the mounting hole 1423, thereby realizing the installation and fixation between the front air guide ring 140 and the front cover plate 110; a number of evenly spaced mounting holes 1423 provide multiple fixing points, making the fixation between the front air guide ring 140 and the front cover plate 110 more stable and firm.

[0055] like Figure 3 , 4 As shown in Figure 5, the bending segment 1422, the connecting segment 1421, the oblique line segment 1411, the first arc 1413 and the second arc 1414 are sequentially connected to form an integral unit.

[0056] In this embodiment, the bending section 1422, the connecting section 1421, the oblique section 1411, the first arc 1413 and the second arc 1414 are connected in sequence to form an integral unit, ensuring the integrity of the front guide ring 140.

[0057] Example 2:

[0058] like Figure 6 and 7 As shown, this embodiment provides a fan, including the volute structure 100 and impeller 200 described in Embodiment 1; the front cover plate 110, the annular wall 130 and the rear cover plate 120 enclose to form a volute cavity 160; the impeller 200 is installed in the volute cavity 160.

[0059] In this embodiment, through the front guide ring 140 and the rear guide ring 150 of the volute structure 100 in Embodiment 1, when the fan is intake, the air enters the volute cavity 160 of the volute structure 100 along the front guide ring 140, which ensures smoother air intake, reduces noise, and greatly improves the user experience of the fan.

[0060] like Figure 8 As shown, the distance from the free end of the rear guide ring 150 to the side of the impeller 200 is i1, 2mm≤i1≤4mm; the distance from the free end of the rear guide ring 150 to the end face of the impeller 200 is i2, 2mm≤i2≤3mm.

[0061] In this embodiment, by limiting the distance i1 from the free end of the rear air guide ring 150 to the side of the impeller 200 and the distance i2 from the free end of the rear air guide ring 150 to the end face of the impeller 200, the installation position of the rear air guide ring 150 is ensured to be reasonable, and the air intake from the rear air inlet 121 is ensured to be smooth.

[0062] Example 3:

[0063] This embodiment provides a range hood, including the fan described in Embodiment 2.

[0064] In this embodiment, the range hood uses the fan of Embodiment 2 to ensure smoother air intake, reduce fan noise, thereby improving the smoke extraction effect of the range hood and reducing noise, thus enhancing the overall performance and user experience of the range hood.

[0065] The above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A volute structure, characterized in that, include: A front cover (110) is provided with a front air inlet (111); The rear cover (120) is provided with a rear air inlet (121); A ring wall (130) is connected between the front cover plate (110) and the rear cover plate (120); A front air guide ring (140) is installed on the front air inlet (111). The front air guide ring (140) includes an annular air guide portion (141) and a mounting portion (142) disposed on the outer edge of the annular air guide portion (141). The longitudinal section of the annular air guide portion (141) includes an interconnected oblique line segment (1411) and a front arc segment (1412). The front arc segment (1412) extends along the air intake direction of the front air inlet (111). A rear air guide ring (150) is connected to the rear air inlet (121). The longitudinal section of the rear air guide ring (150) includes a rear arc segment (151), which extends along the air intake direction of the rear air inlet (121).

2. The volute structure according to claim 1, characterized in that, The front arc segment (1412) includes a first arc (1413) and a second arc (1414). One side of the first arc (1413) is connected to the oblique line segment (1411), and the second arc (1414) is connected to the side of the first arc (1413) away from the oblique line segment (1411).

3. The volute structure according to claim 2, characterized in that, The oblique line segment (1411) is tangent to the first arc (1413), and the first arc (1413) is tangent to the second arc (1414).

4. The volute structure according to claim 2, characterized in that, The radius of the first arc (1413) is r1, 12mm≤r1≤18mm; the radius of the second arc (1414) is r2, 3mm≤r2≤5mm.

5. The volute structure according to any one of claims 1-4, characterized in that, The oblique line segment (1411) is set at an angle, and the oblique line segment (1411) is inclined towards the upper part of the front air inlet (111); the angle between the oblique line segment (1411) and the horizontal line is α, 170°≤α≤175°.

6. The volute structure according to any one of claims 2-4, characterized in that, The mounting section (142) includes a connecting section (1421) and a bending section (1422). One side of the connecting section (1421) is connected to the side of the oblique line section (1411) away from the first arc (1413). The bending section (1422) is connected to the side of the connecting section (1421) away from the oblique line section (1411). The bending section (1422) bends toward the air intake direction of the front air inlet (111).

7. The volute structure according to claim 6, characterized in that, The connecting segment (1421) is provided with a plurality of mounting holes (1423), which are evenly and spaced apart on the connecting segment (1421).

8. A fan, characterized in that, include: The volute structure according to any one of claims 1-7, wherein the front cover plate (110), the annular wall (130) and the rear cover plate (120) enclose a volute cavity (160); Impeller (200), which is installed inside the volute cavity (160).

9. The fan according to claim 8, characterized in that, The distance from the free end of the rear guide ring (150) to the side of the impeller (200) is i1, 2mm≤i1≤4mm; the distance from the free end of the rear guide ring (150) to the end face of the impeller (200) is i2, 2mm≤i2≤3mm.

10. A range hood, characterized in that... Includes the wind turbine as described in claim 8 or 9.

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