CN218093601U

CN218093601U - Volute for range hood, fan system and range hood

Info

Publication number: CN218093601U
Application number: CN202221530424.5U
Authority: CN
Inventors: 易芳文
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2022-06-16
Filing date: 2022-06-16
Publication date: 2022-12-20
Anticipated expiration: 2032-06-16

Abstract

The utility model relates to a volute for a range hood, which comprises a shell, wherein the shell comprises a front cover plate, a rear cover plate and a ring wall for connecting the front cover plate and the rear cover plate, an air inlet is arranged on the front cover plate and/or the rear cover plate, and the front cover plate, the rear cover plate and the ring wall jointly enclose to form an air outlet positioned at the top of the shell; the method is characterized in that: the center of the annular wall is provided with at least two flow guide parts which are connected end to end, each flow guide part extends along the circumferential direction of the annular wall and forms a step at the joint of the end and the tail, and a space is reserved between two sides of each flow guide part and the corresponding side of the annular wall. Also discloses a fan system applying the volute for the range hood and a range hood applying the fan system. The volute enables the fan system to reduce airflow noise and improve the oil fume suction effect.

Description

Volute and fan system for range hood and range hood

Technical Field

The utility model relates to a range hood technical field, in particular to a spiral case, fan system and range hood for range hood.

Background

The range hood is a common kitchen appliance, and mainly drives air flow through a fan to quickly exhaust oil smoke generated in a cooking process and discharge the oil smoke to the outside so as to purify a kitchen environment. The fan system in the existing range hood generally adopts a multi-wing centrifugal fan to drive oil smoke and air to flow. The volute of the existing centrifugal fan comprises a front cover plate, a rear cover plate and a ring wall for connecting the front cover plate and the rear cover plate.

When the range hood operates, because the air current that the impeller rotation in the fan system produced is inhomogeneous, and the structure of the single spiral case molded lines design of inside wind channel can't cushion and encircle the air current, lead to the air current to form the swirl in spiral case mouth department to produce great aerodynamic noise, influence the user and cook and experience and feel.

In order to solve the above technical problem, the chinese utility model with patent No. ZL202122703503.3 (No. CN 216111340U) discloses a volute structure, a fan and a range hood, which separates an air outlet channel into a first air channel and a second air channel by a guide plate arranged in the air outlet channel, wherein the air flow entering from an air inlet in the volute structure is respectively flowed out from the first air channel and the second air channel, thereby the air flow contacting with a volute tongue is reduced. Although the volute structure can reduce the noise enriched at the volute tongue through the guide plate, the above volute structure still has the following technical problems to be solved: 1. because the position of the guide plate in the air outlet channel is close to that of the impeller in the volute, when strong airflow guided out during rotation of the impeller is forcedly divided by the guide plate, the resistance borne by the guide plate is large, so that the guide plate is easy to generate large aerodynamic noise during flow division; 2. the baffle reduces the rate at which the airflow is discharged when the airflow is diverted. Further improvements are needed for this purpose.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the first technical problem that to above-mentioned prior art, provide a spiral case that is used for range hood that can reduce the air current noise.

The utility model discloses the second technical problem that will solve is to above-mentioned prior art, provides the intake that can increase the spiral case, and then improves the spiral case that is used for range hood of air current discharge rate.

The utility model discloses the third technical problem that will solve is to above-mentioned prior art, provides an use fan system who has above-mentioned spiral case.

The utility model discloses the fourth technical problem that will solve is to above-mentioned prior art, provides an use range hood that has above-mentioned fan system.

The utility model provides a technical scheme that above-mentioned first and second technical problem adopted is: a volute for a range hood comprises a shell, wherein the shell comprises a front cover plate, a rear cover plate and a ring wall for connecting the front cover plate and the rear cover plate, an air inlet is formed in the front cover plate and/or the rear cover plate, and the front cover plate, the rear cover plate and the ring wall jointly enclose to form an air outlet positioned at the top of the shell; the method is characterized in that:

the central authorities of rampart are equipped with the water conservancy diversion portion that two at least end to end connect, and each water conservancy diversion portion all extends and forms the step in end to end department of meeting along the rampart circumference, and has the interval between two sides of water conservancy diversion portion and the rampart side that corresponds.

The forming method of the steps comprises the following steps: the tail part of the flow guide part is firstly concave towards the center of the volute and then is bent towards the center of the volute, so that the step is formed. The tail part of the flow guide part is bent towards the center direction of the volute, so that the height difference exists between the tail part of the flow guide part and the head part of the next flow guide part, and the air flow guided by the tail part of the flow guide part is separated from the wall surface and enters the next flow guide part, so that the viscous noise of the air flow to the annular wall is effectively reduced, and the noise generated by the air flow is reduced.

In order to prevent the airflow guided by the guide part from transversely jumping to two sides of the annular wall, two side edges of the guide part are provided with flanges bent towards the center of the volute. The flange is used for blocking the airflow, so that the airflow flows in the flow guide part in order, and the generation of vortex is reduced, thereby reducing the noise of the airflow.

In order to realize that the flow guide part can buffer the airflow, the annular wall comprises a first sub annular wall, a second sub annular wall and a third sub annular wall which are sequentially arranged along the width direction of the annular wall, two flanges of the flow guide part are correspondingly boundaries of the second sub annular wall and the first sub annular wall as well as the third sub annular wall, and the outer surface of each flow guide part is higher than the outer surfaces of the first sub annular wall and the third sub annular wall.

In order to reduce the noise of the air flow and simultaneously reduce the air outlet speed as much as possible, the flow guide parts are arranged in the center of the second sub-annular wall, and the second sub-annular wall is consistent with the profile lines of the first sub-annular wall and the third sub-annular wall at the position close to the air outlet.

In order to play a role in guiding the airflow and not influence the discharge of the airflow, the ratio of the width of the second sub-annular wall to the width of the annular wall is alpha, and the value range of alpha is more than or equal to 1/4 and less than or equal to 1/2.

In order to make the installation of the flow guide parts simpler, the flow guide parts which are connected end to end on the annular wall are integrally formed.

The solution adopted to solve the third technical problem is as follows: the utility model provides an use fan system that has above-mentioned spiral case that is used for range hood which characterized in that: the spiral case is characterized by further comprising an impeller and a motor, wherein the impeller is arranged in the spiral case, the motor is arranged on a rear cover plate of the spiral case, and an output shaft of the motor is connected with the impeller.

The scheme adopted to solve the fourth technical problem is as follows: a range hood, its characterized in that: the fan system is applied.

Compared with the prior art, the utility model has the advantages of: the flow guide part which extends along the circumferential direction of the annular wall and is connected end to end is additionally arranged in the center of the annular wall, and the head to end connection part of the flow guide part forms a step, so that the height difference is formed between the center and two sides of the annular wall, the flow guide effect of airflow can be achieved, and the airflow guided from the flow guide part is prevented from transversely jumping; in addition, the step is utilized to lengthen the airflow path, so that the outflow speed of the airflow is slowed down, the viscous noise of the airflow to the annular wall is reduced, meanwhile, because the airflow is buffered, the air pressure is suddenly reduced when the airflow passes through the step, the difference between the air pressure inside and outside the annular cavity is increased, the air inlet volume of the volute is increased, the oil smoke absorption effect of the fan system is improved, and the cooking experience of a user is improved.

Drawings

Fig. 1 is a schematic structural diagram of a fan system according to an embodiment of the present invention;

FIG. 2 is a schematic view of the structure of FIG. 1 from another perspective;

FIG. 3 is a cross-sectional view of FIG. 1;

FIG. 4 is a schematic view of the volute of FIG. 1;

FIG. 5 is an exploded view of FIG. 4;

fig. 6 is a schematic structural view of the second sub-annular wall in fig. 5.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 4 to 6, the scroll casing in this embodiment includes a casing 1, the casing 1 includes a front cover plate 11, a rear cover plate 12 and a circular wall 13 connecting the front cover plate 11 and the rear cover plate 12, an air inlet is formed in the front cover plate 11 and/or the rear cover plate 12, in this embodiment, the air inlet corresponds to a first air inlet 14a formed in the front cover plate 11 and a second air inlet 14b formed in the rear cover plate 12, and the front cover plate 11, the rear cover plate 12 and the circular wall 13 together enclose an air outlet 15 located at the top of the casing 1.

Wherein the center of rampart 13 is equipped with two at least water conservancy diversion portions 2 that meet end to end, and each water conservancy diversion portion 2 all extends along rampart 13 circumference and forms step 4 in end to end department of meeting, and has the interval between two sides of water conservancy diversion portion 2 and the rampart 13 side that corresponds. The flow guiding parts 2 connected end to end on the annular wall 13 are preferably integrally formed, and the tail parts 21 of the flow guiding parts 2 are firstly concave towards the center of the volute and then bent towards the center of the volute, so that the steps 4 are formed; in addition, both side edges of the flow guide part 2 have flanges 23 bent toward the center of the scroll. Because the air current is unordered, the flange 23 that is equipped with at the both sides edge of water conservancy diversion portion 2, so a part of air current assembles the ring intracavity between two flanges 23 and discharges because of the guide effect of water conservancy diversion portion 2, prevent effectively that the air current in the wind channel from shifting transversely and reduce the vortex and produce, thus improve the air current noise; in addition, when the airflow flows out, the airflow outflow path is enlarged due to the step 4, the outflow speed is slowed down, the airflow which originally flows close to the flow guide part 2 can be buffered at the step 4 and separated from the flow guide part 2, the viscous noise of the airflow to the inner annular wall can be effectively reduced, the noise generated by the airflow is reduced, and meanwhile, because the airflow is buffered, the air pressure is suddenly reduced when the airflow passes through the step 4, the air pressure difference between the inside and the outside of the annular cavity is increased, the air inlet volume of the volute is increased, the smoke absorption effect of the fan system is improved, and the cooking experience of a user is improved; the other part of the air flow is directly discharged to the air outlet 15 along the left side and the right side of the flange 23 without influencing the original air discharge.

For convenience of describing the structure of the annular wall, the annular wall 13 in this embodiment includes a first sub annular wall 131, a second sub annular wall 132, and a third sub annular wall 133 sequentially arranged along the width direction thereof, two flanges 23 of the flow guide portion 2 correspond to the boundaries between the second sub annular wall 132 and the first sub annular wall 131 and the third sub annular wall 133, and the outer surface of each flow guide portion 2 is higher than the outer surfaces of the first sub annular wall 131 and the third sub annular wall 133. The second sub-annular wall 132 with a height difference is integrally connected with the adjacent first sub-annular wall 131 and the third sub-annular wall 133 in a transition manner, and forms the whole volute cavity with the front cover plate 11 and the rear cover plate 12. In order to increase the air outlet rate, each flow guiding portion 2 is disposed at the center of the second sub-annular wall 132, and the second sub-annular wall 132 is in line with the first sub-annular wall 131 and the third sub-annular wall 133 at a position adjacent to the air outlet 15. In addition, in order to achieve the airflow guiding effect and not affect the discharge of the airflow, the ratio of the width of the second sub-annular wall 132 to the width of the annular wall 13 is α, and the value range of α is 1/4 ≦ α ≦ 1/2, and α =1/3 is preferred in this embodiment.

The volute is mainly used in a fan system (centrifugal fan) as a power device, wherein as shown in fig. 1-3, the fan system comprises the volute, an impeller 5 and a motor 6, the impeller 5 is arranged in the volute, the motor 6 is arranged on a rear cover plate 12 of the volute, and an output shaft of the motor 6 is connected with the impeller 5. The fan system can be used in a range hood, and a range hood with the fan system is a prior art, and details are not repeated herein, and refer to what is disclosed in patent No. ZL202122266966.8 applied by the present applicant.

When a motor 6 in the fan system operates, oil smoke and air are driven to enter from an air inlet until finally discharged from the impeller 5 to an exhaust channel formed by the front cover plate 11, the rear cover plate 12 and the annular wall 13 which are enclosed together, and the volute can buffer and guide the air flow so as to finally reduce the noise generated by the air flow.

Directional terms such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", and the like are used in the description and claims of the present invention to describe various example structural portions and elements of the present invention, but these terms are used herein for convenience of description only and are determined based on example orientations shown in the drawings. Because the disclosed embodiments of the present invention may be oriented in different directions, the directional terms are used for descriptive purposes and are not to be construed as limiting, e.g., "upper" and "lower" are not necessarily limited to directions opposite to or coincident with the direction of gravity.

Claims

1. A volute for a range hood comprises a shell (1), wherein the shell (1) comprises a front cover plate (11), a rear cover plate (12) and a circular wall (13) for connecting the front cover plate and the rear cover plate, the front cover plate (11) and/or the rear cover plate (12) are/is provided with an air inlet, and the front cover plate (11), the rear cover plate (12) and the circular wall (13) jointly enclose to form an air outlet (15) positioned at the top of the shell (1); the method is characterized in that:

the central authorities of cliff (13) are equipped with two at least water conservancy diversion portions (2) that meet end to end, and each water conservancy diversion portion (2) all extend and form step (4) in end to end department of meeting along cliff (13) circumference, and have the interval between two sides of water conservancy diversion portion (2) and cliff (13) sides that correspond.

2. The volute for a range hood according to claim 1, wherein: the tail part (21) of the flow guide part (2) is firstly concave towards the center of the volute and then is bent towards the center of the volute, so that the step (4) is formed.

3. The volute for a range hood according to claim 1 or 2, wherein: the two side edges of the flow guide part (2) are provided with flanges (23) bent towards the center of the volute.

4. The volute for a range hood according to claim 3, wherein: the annular wall (13) comprises a first sub annular wall (131), a second sub annular wall (132) and a third sub annular wall (133) which are sequentially arranged along the width direction of the annular wall, two flanges (23) of the flow guide part (2) are correspondingly boundaries of the second sub annular wall (132) and the first sub annular wall (131) and the third sub annular wall (133), and the outer surface of each flow guide part (2) is higher than the outer surfaces of the first sub annular wall (131) and the third sub annular wall (133).

5. The volute for a range hood according to claim 4, wherein: each flow guide part (2) is arranged in the center of the second sub-annular wall (132), and the second sub-annular wall (132) is consistent with the profiles of the first sub-annular wall (131) and the third sub-annular wall (133) at the position adjacent to the air outlet (15).

6. The volute for a range hood according to claim 5, wherein: the ratio of the width of the second sub-annular wall (132) to the width of the annular wall (13) is alpha, and the value range of alpha is more than or equal to 1/4 and less than or equal to 1/2.

7. The volute for a range hood according to claim 1, wherein: the guide parts (2) which are connected end to end on the annular wall (13) are integrally formed.

8. A fan system using the volute of the range hood according to any one of the above claims 1 to 7, wherein: still include impeller (5) and motor (6), impeller (5) are located in the spiral case, motor (6) are located on the back shroud (12) of spiral case, the output shaft of motor (6) with impeller (5) are connected.

9. A range hood, its characterized in that: the fan system of claim 8 is applied.