CN215001768U - Volute structure and range hood - Google Patents

Abstract

The utility model discloses a spiral case structure and range hood. The volute structure comprises a volute body with a cavity, wherein a first air inlet communicated with the cavity is formed in a surrounding plate of the volute body, and a flow limiting piece is installed at the first air inlet; the flow-limiting piece is provided with a plurality of flow-limiting holes. The first air inlet can increase the air inlet volume of the volute structure, the flow limiting piece can not only play a role in effectively filtering noise generated when air flow enters, but also can reduce the loss of air exhaust pressure in the cavity, and the effect of not losing negative pressure while increasing the air inlet volume is guaranteed. The utility model discloses a range hood includes the cigarette machine body and locates the spiral case structure on the cigarette machine body. The utility model discloses can the effectual problem of solving current unable balanced intake and noise of spiral case structure.

Description

Volute structure and range hood

Technical Field

The utility model relates to a range hood technical field, concretely relates to spiral case structure and range hood.

Background

The range hood is used as an essential kitchen appliance for modern families, and most of range hoods sold on the market at present mainly adopt two morphological structures, namely a top suction type and a side suction type. The technical points influencing the smoking effect and the smoke absorbing capacity of the range hood include whether the air intake and the air guide of the range hood are reasonable, whether the air intake is smooth, the air intake amount and the like.

As shown in fig. 1 and 2, the range hood includes a volute body 1 having a cavity, a motor 2 is installed at an opening of a back plate 11 of the volute body 1, an air guiding ring 3 is arranged in the circumferential direction of an opening of a front plate 12 of the volute body 1, and an impeller is installed on an output shaft of the motor 2. After the motor 2 is started, the impeller can be driven to rotate, so that air enters the cavity from an air inlet formed by enclosing the air guide ring 3 and flows out from an air outlet 14 of the cavity, and suction and discharge work is finished. Because the impeller usually takes the wind gathering at the front end as the main part, the left space behind the cavity of the volute body 1 is limited, so that air can not enter the cavity from the back of the cavity basically, and the air inlet amount of the volute body is limited. In order to increase the intake air, the impeller is usually operated at a higher speed by increasing the speed of the motor 2, but this increases the noise.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem of the unable balanced intake and the noise of spiral case for present range hood, the utility model provides a spiral case structure.

Another object of the present invention is to provide a range hood using the above volute structure.

The utility model discloses an adopt following scheme to realize:

the utility model provides a volute structure, which comprises a volute body with a cavity, wherein a first air inlet communicated with the cavity is formed in a wall plate of the volute body, and a current limiting piece is arranged at the first air inlet; the flow-limiting piece is provided with a plurality of flow-limiting holes.

Right the utility model discloses a further improvement part of spiral case structure lies in, first air intake is located the position that the bottom the left side of bounding wall is close to the motor center.

The further improvement of the volute structure of the utility model is that the connecting line between the first air inlet and the middle part of the motor (2) and the motor form an included angle beta with the degree of 5-15 degrees between the axes of the vertical direction.

The further improvement of the volute structure of the utility model is that the degree of the included angle beta is 7-11 degrees.

It is right the utility model discloses a further improvement part of spiral case structure lies in, is close to the air outlet of spiral case body the second air intake has still been seted up on the bounding wall, second air intake department also installs the current-limiting piece, the second air intake is located the top of first air intake.

The further improvement of the volute structure of the utility model is that the second air inlet and the line in the middle of the motor and the first air inlet and the line in the middle of the motor form an included angle alpha of 95-110 degrees between them.

The further improvement of the volute structure of the utility model is that the degree of the included angle alpha is 100-105 degrees.

The spiral case structure of the utility model is further improved in that the aperture ratio of the current-limiting piece is 93-96%, and the aperture of the current-limiting hole is 0.3-0.7 mm.

The volute casing structure of the utility model is further improved in that the volute casing structure further comprises a first air inlet part with a first air flow channel; the first air flow channel is communicated with the cavity through the first air inlet.

It is right the utility model discloses a further improvement part of spiral case structure lies in, first air inlet spare includes first passageway wall, first passageway wall with the bounding wall is connected and is formed first air current channel, the edge of the air inlet end of first passageway wall is the wave form.

The volute structure of the utility model is further improved in that the air inlet of the first air flow channel faces the right side of the volute body.

The volute casing structure of the utility model is further improved in that the volute casing structure further comprises a second air inlet part with a second airflow channel; and the second air flow channel is communicated with the cavity through the second air inlet.

It is right the utility model discloses a volute structure's further improvement part lies in, second air inlet spare includes the second channel wall, the second channel wall with the bounding wall is connected and is formed second airflow channel, the edge of the air inlet end of second channel wall is wavy shape.

The volute structure of the utility model is further improved in that the air inlet of the second airflow channel faces the lower part of the volute body.

The utility model also provides a range hood, including the cigarette machine body to and foretell spiral case structure, spiral case structure locates the cigarette machine is originally internal.

Compared with the prior art, adopt above-mentioned scheme the beneficial effects of the utility model are that:

the utility model discloses an among the volute structure, because first air intake has been seted up on the bounding wall, so when motor start-up drove the impeller and rotate, wind not only can be followed and enclosed the air intake that closes formation by the wind-guiding circle and enter into the die cavity, but also can follow first air intake and enter into the die cavity in, this air intake that has just increased volute structure under the prerequisite that does not increase motor speed. The first air inlet is provided with a flow limiting piece; the flow limiting piece is provided with a plurality of flow limiting holes, and air enters the cavity through the flow limiting holes and the first air inlet, so that the flow limiting piece not only can effectively filter noise generated when airflow enters, but also can reduce the effective air inlet area of the first air inlet, thereby reducing the loss of exhaust pressure in the cavity and ensuring that the air inlet amount is increased without losing negative pressure; because the flow-limiting piece is provided with a plurality of flow-limiting holes, the air inlet speed from the first air inlet and into the volute body cavity can be increased, and the noise is reduced. Just so can the unable problem of balanced intake and noise of present spiral case structure of effectual solution.

And the utility model discloses a range hood because what adopt is foretell spiral case structure, so can the unable balanced intake and the problem of noise of present spiral case structure of effectual solution at least.

Drawings

FIG. 1 is a schematic perspective view of a conventional volute structure, in which arrows indicate the flow direction of air;

FIG. 2 is a schematic structural view of the volute structure of FIG. 1 in cross-section with the arrows indicating the direction of airflow;

fig. 3 is a schematic perspective view of a scroll structure provided in this embodiment under a first visual sense, wherein an arrow represents a flow direction of an air flow;

fig. 4 is a schematic structural diagram of a scroll structure provided in this embodiment in a front view, in which arrows represent the flow direction of the airflow;

FIG. 5 is a schematic view in cross-section of the volute structure of FIG. 3, with arrows indicating the direction of airflow;

FIG. 6 is an enlarged schematic view of the structure at A in FIG. 5;

FIG. 7 is an enlarged schematic view of the structure at B in FIG. 3;

FIG. 8 is a schematic perspective view of the flow restriction member exploded from the first air inlet member in a second view of the scroll structure according to the present embodiment, wherein arrows indicate the flowing direction of the airflow;

fig. 9 is a schematic perspective view of the flow-limiting member exploded from the second air inlet member in a third visual sense of the scroll structure according to the present embodiment, wherein arrows indicate the flowing direction of the airflow;

fig. 10 is a schematic perspective view of a flow restriction member of a volute structure according to this embodiment.

In the figure: 1. a volute body; 2. a motor; 3. a wind guide ring; 11. a back plate; 12. a front plate; 13. enclosing plates; 14. an air outlet; 15. a flow restriction; 16. a first air intake member; 17. a second air inlet part; 131. a first air inlet; 132. a second air inlet; 151. and a flow restriction orifice.

Detailed Description

In order to make the above objects, features, advantages, etc. of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "axial", "radial", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The meaning of "plurality" is two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Example 1

As shown in fig. 1 and 2, a conventional volute structure includes a volute body 1 having a cavity, the cavity is defined by a back plate 11, a front plate 12 and a surrounding plate 13, a mounting hole is usually formed in the back plate 11 for mounting a motor 2, the motor 2 is disposed in the cavity, and an impeller is mounted on an output shaft of the motor 2; the front plate 12 is provided with an opening as an air inlet, and the air guide ring 3 is arranged on the circumference of the air inlet. The motor 2 drives the impeller to rotate after being started, air enters the cavity of the volute body 1 from the air inlet formed by enclosing the air guide ring 3, and finally the air outlet 14 of the cavity flows out of the volute body 1 to finish suction and discharge work. Because the impeller is usually designed mainly by wind gathering at the front end, the left space at the back of the cavity of the volute body 1 is limited, so that the air inlet amount of the volute body 1 is limited, and in order to increase the air inlet amount, the rotating speed of the motor 2 is usually increased to enable the impeller to operate at a higher rotating speed, but the noise is increased.

The surface of the wind guiding ring 3 is a curved surface which is turned over towards the inside of the volute body 1, so that a good wind guiding effect is achieved.

As shown in fig. 3 to 10, in order to solve the problem that the conventional volute structure cannot balance the air intake and the noise, the present embodiment provides a volute structure, which includes a volute body 1 having a cavity, a first air inlet 131 communicated with the cavity is formed in a surrounding plate 13 of the volute body 1, and a flow limiting member 15 is installed at the first air inlet 131; the restrictor 15 is provided with a plurality of restrictor orifices 151.

In this embodiment, because the first air inlet 131 is formed in the enclosing plate 13, when the motor 2 is started to drive the impeller to rotate, air can enter the cavity from the air inlet formed by enclosing the air guide ring 3, and can enter the cavity from the first air inlet 131, so that the air inlet amount of the volute structure is increased on the premise of not increasing the rotation speed of the motor. The first air inlet 131 is provided with the flow limiting piece 15; the flow limiting piece 15 is provided with a plurality of flow limiting holes 151, air enters the cavity through the flow limiting holes 151 and the first air inlet 131, the flow limiting piece 15 not only can effectively filter noise generated when air flow enters, but also can reduce the effective air inlet area of the first air inlet 131, the loss of exhaust pressure in the cavity is reduced, and the effect of increasing air inlet amount without losing negative pressure is ensured; because the plurality of flow restriction holes 151 are formed in the flow restriction member 15, the speed of the air entering from the first air inlet 131 and the cavity of the volute body 1 can be increased, and the noise can be reduced. Just so can the unable problem of balanced intake and noise of present spiral case structure of effectual solution.

As shown in fig. 10, in the present embodiment, the aperture ratio of the flow restrictor 15 is 93% to 96%, and the aperture of the flow restricting hole 151 is 0.3mm to 0.7mm, and it is determined through trial and error that the noise reduction effect of the flow restrictor 15 is the best under test conditions such as the same rotation speed when the aperture ratio of the flow restrictor 15 is 93% to 96% and the aperture of the flow restricting hole 151 is 0.3mm to 0.7 mm.

Preferably, the orifice ratio of the restrictor 15 is 93% to 96%, and the diameter of the orifice 151 is 0.36mm to 0.68 mm.

In this embodiment, the number of the first air inlets 131 is at least one. However, it is preferable that the number of the first wind inlets 131 is one in this embodiment, because it is possible to reduce the negative pressure in the cavity by opening too many first wind inlets 131.

As shown in fig. 4, in this embodiment, the first air inlet 131 is disposed at a position near the center of the motor 2 on the left of the bottom of the enclosure 13, so as to ensure that a large air flow is sucked into the cavity, thereby assisting the impeller to generate a large air discharge torque, and achieving the effect of increasing the air intake amount and simultaneously reducing turbulence and noise as much as possible.

As shown in fig. 4, in this embodiment, an included angle β of 5 ° to 15 ° is formed between a connection line between the first air inlet 131 and the middle of the motor 2 and an axis of the motor 2 in the vertical direction, so that a larger air flow can be ensured to be sucked into the cavity, and the auxiliary impeller generates a larger air discharge torque, thereby increasing the air intake and further reducing turbulence and noise.

Preferably, the included angle β is in the range of 7 ° to 11 °.

Preferably, an included angle β of 7 to 11 degrees is formed between the projection of the connecting line of the center of the first air inlet 131 and the output shaft of the motor 2 and the projection of the axis of the output shaft of the motor 2 in the vertical direction, so that the air flow can be sucked into the cavity to the maximum extent, the auxiliary impeller generates a large air exhaust torque, the air intake is increased, and the turbulence and the noise are reduced as much as possible.

As shown in fig. 3, 4, 8 and 9, in the present embodiment, a second air inlet 132 is further formed on the enclosure plate 13 close to the air outlet 14 of the volute body 1, a flow limiting member 15 is also installed at the second air inlet 132, and the second air inlet 132 is disposed above the first air inlet 131.

The second air inlet 132 can generate a larger air flow to be sucked into the cavity, so as to assist the impeller to generate a larger air exhaust torque, and thus, the effect of increasing the air inlet amount is achieved. The second air inlet 132 is also provided with the flow limiting piece 15, so that the flow limiting piece 15 not only can effectively filter noise generated when air flow enters, but also can reduce the effective air inlet area of the first air inlet 131, thereby reducing the loss of exhaust pressure in the cavity and ensuring that the air inlet amount is increased without losing negative pressure; because the plurality of flow-limiting holes 151 are formed in the flow-limiting piece 15, the air inlet speed from the first air inlet 131 and into the cavity of the volute body 1 can be increased, and the noise reduction effect is achieved, so that the problem that the existing volute structure cannot balance the air inlet amount and the noise is effectively solved.

In this embodiment, an included angle α of 95 to 110 degrees is formed between a connecting line between the second air inlet 132 and the middle of the motor 2 and a connecting line between the first air inlet 131 and the middle of the motor 2, so that a larger air flow can be ensured to be sucked into the cavity, thereby assisting the impeller to generate a larger air discharge torque, and realizing an effect of further reducing turbulence and noise while increasing the air intake.

Preferably, the included angle α is 100 ° to 105 °.

Preferably, the included angle α is 103 °.

Preferably, an included angle α of 103 degrees is formed between the projection of the connecting line between the center of the second air inlet 132 and the output shaft of the motor 2 and the projection of the connecting line between the center of the first air inlet 131 and the output shaft of the motor 2, so that the air flow can be sucked into the cavity to the maximum extent, the auxiliary impeller generates a large air exhaust torque, the air intake is increased, and meanwhile, the turbulent flow and the noise are reduced as much as possible.

As shown in fig. 3, 4, 8 and 9, in the present embodiment, a first air intake member 16 having a first air flow channel is further included; the first air flow passage is communicated with the cavity through a first air inlet 131. When the motor 2 is started to drive the impeller to rotate, most of air enters the cavity of the volute body 1 from the air inlet formed by the air guide ring 3 in a surrounding mode, and a small amount of air enters the cavity of the volute body 1 through the first air flow channel and the first air inlet 131, so that the air inlet amount is increased; because the flow limiting member 15 is arranged in the first airflow channel, the flow limiting member 15 can also effectively filter noise generated when airflow enters, and can reduce the effective air inlet area of the first air inlet 131, thereby reducing the loss of the exhaust pressure in the cavity and ensuring that the air inlet amount is increased without losing negative pressure.

Preferably, the flow restriction 15 is disposed at the air inlet of the first air flow channel, and the shape of the flow restriction 15 is the same as that of the air inlet of the first air flow channel.

In this embodiment, the first air inlet member 16 includes a first channel wall, the first channel wall is connected with the enclosing plate 13 to form a first air flow channel, and an edge of an air inlet end of the first channel wall is in a wave shape, and the wave-shaped air inlet end can effectively interfere with generation and transmission of air flow noise, so as to increase air flow entrance without increasing noise.

As shown in fig. 6-9, it is preferable that the first air inlet 131 is formed in the surrounding plate 13 and the excess surrounding plate 13 is flanged outward to form the first passage wall integrally.

As shown in fig. 4, in this embodiment, the inlet of the first air flow channel can face any direction, but in consideration of the problem of increasing the air intake, in this embodiment, the inlet of the first air flow channel preferably faces the right side of the volute body 1, and the inlet direction of the first air flow channel is tangential to the shroud 13, so that the flow direction of the air flow entering the cavity from the first air flow channel is as consistent as possible with the flow direction of the original air flow in the cavity.

As shown in fig. 3, 4, 8 and 9, in the present embodiment, a second air intake member 17 having a second air flow channel is further included; the second air flow path communicates with the cavity through a second air inlet 132. When the motor 2 is started to drive the impeller to rotate, most of air enters the cavity of the volute body 1 from the air inlet formed by the air guide ring 3 in a surrounding mode, and a small amount of air enters the cavity of the volute body 1 through the second air flow channel and the second air inlet 132, so that the air inlet amount is increased; because the flow limiting member 15 is disposed in the first airflow channel, the flow limiting member 15 can also effectively filter noise generated when the airflow enters, and can reduce the effective air inlet area of the second air inlet 132, thereby reducing the loss of the exhaust pressure in the cavity, and ensuring that the air inlet amount is increased without loss of the negative pressure.

Preferably, the flow restriction 15 is disposed at an air inlet of the second air flow channel, and the shape of the flow restriction 15 is the same as that of the air inlet of the second air flow channel.

In this embodiment, the second air inlet member 17 includes a second channel wall, the second channel wall is connected with the enclosing plate 13 to form a second air flow channel, the edge of the air inlet end of the second channel wall is in a wave shape, and the wave-shaped air inlet end can effectively interfere with the generation and propagation of air flow noise, so as to play a role in increasing the air flow entering without increasing the noise.

As shown in fig. 6-9, it is preferable that the enclosure 13 adjacent to the air outlet 14 is provided with the second air inlet 132 and the excess enclosure 13 is flanged outward to form the second passage wall.

As shown in fig. 4, in this embodiment, the air inlet of the second air flow channel can face any direction, but in consideration of the problem of increasing the air inlet volume, in this embodiment, it is preferable that the air inlet of the second air flow channel faces the lower part of the volute body 1, and the air inlet direction of the second air flow channel is tangential to the shroud 13, so that the flow direction of the air flow entering the cavity from the second air flow channel is as consistent as possible with the flow direction of the original air flow in the cavity.

Working process;

starting a motor 2 arranged in the cavity, wherein the motor 2 drives an impeller to rotate, most of air flow enters the cavity from an air inlet formed by enclosing an air guide ring 3, one part of air flow enters the cavity from a first air flow channel and a first air inlet 131 of a first air inlet part 16, and the other part of air flow enters the cavity from a second air flow channel and a second air inlet 132 of a second air inlet part 17; because the air inlet of the first airflow channel and the air inlet of the second airflow channel are respectively provided with the flow limiting piece 15 (such as a flow limiting sheet), and the flow limiting holes 151 are formed in the flow limiting pieces 15, the effect of noise generated when airflow enters can be effectively filtered, the loss of exhaust pressure in the cavity can be reduced, the effect of excessive loss of negative pressure in the cavity while the air inlet amount is increased is ensured, and the problem that the air inlet amount and the noise cannot be balanced by the conventional volute structure is effectively solved.

Example 2

The embodiment provides a range hood, which comprises a range hood body and the volute structure of the embodiment 1, wherein the volute structure is arranged in the range hood body.

Because the present embodiment adopts the volute structure of embodiment 1, the present embodiment can at least effectively solve the problem that the current volute structure cannot balance the air intake and the noise.

In the description of the present specification, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the described parent features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (15)

1. A volute structure comprises a volute body (1) with a cavity, and is characterized in that a first air inlet (131) communicated with the cavity is formed in a surrounding plate (13) of the volute body (1), and a flow limiting piece (15) is installed at the first air inlet (131); the flow-limiting piece (15) is provided with a plurality of flow-limiting holes (151).

2. The volute structure according to claim 1, wherein the first air inlet (131) is provided at a position near the center of the motor (2) on the left of the bottom of the shroud (13).

3. The volute structure of claim 2, wherein an included angle β of 5 ° to 15 ° is formed between a line connecting the first air inlet (131) and the middle of the motor (2) and an axis of the motor (2) in a vertical direction.

4. The volute structure of claim 3, wherein the included angle β is between 7 ° and 11 °.

5. The volute structure according to claim 2, wherein a second air inlet (132) is further formed in the shroud plate (13) close to the air outlet (14) of the volute body (1), the flow restrictor (15) is further installed at the second air inlet (132), and the second air inlet (132) is formed above the first air inlet (131).

6. The volute structure according to claim 5, wherein an angle α of 95 to 110 ° is formed between a line connecting the second air inlet (132) and the middle of the motor (2) and a line connecting the first air inlet (131) and the middle of the motor (2).

7. The volute structure of claim 6, wherein the included angle α is between 100 ° and 105 °.

8. The volute structure of claim 1, wherein the orifice (15) has an opening ratio of 93-96% and the orifice (151) has an aperture diameter of 0.3-0.7 mm.

9. The volute structure of any of claims 1-8, further comprising a first air inlet member (16) having a first air flow channel; the first air flow channel is communicated with the cavity through the first air inlet (131).

10. The volute structure of claim 9, wherein the first air inlet member (16) comprises a first channel wall connected to the shroud (13) to form the first air flow channel, and wherein an edge of an air inlet end of the first channel wall has a wavy shape.

11. The volute structure of claim 9, wherein the inlet of the first flow path is toward the right side of the volute body (1).

12. The volute structure of any of claims 5-7, further comprising a second air inlet member (17) having a second air flow path; the second air flow channel is communicated with the cavity through the second air inlet (132).

13. The volute structure of claim 12, wherein the second air inlet member (17) includes a second channel wall connected to the shroud (13) to form the second air flow channel, and wherein an edge of an air inlet end of the second channel wall has a wavy shape.

14. The volute structure of claim 12, wherein an inlet of the second gas flow path is directed downward of the volute body (1).

15. A range hood, comprising a range hood body and a volute structure according to any one of claims 1-14, wherein the volute structure is disposed in the range hood body.

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