CN110067773B

CN110067773B - Impeller, fan and range hood

Info

Publication number: CN110067773B
Application number: CN201810063800.6A
Authority: CN
Inventors: 董辉; 孟永哲; 王斌龙; 艾希顺
Original assignee: Qingdao Haier Intelligent Cooking Appliances Co Ltd
Current assignee: Qingdao Haier Intelligent Cooking Appliances Co Ltd
Priority date: 2018-01-23
Filing date: 2018-01-23
Publication date: 2024-07-30
Anticipated expiration: 2038-01-23
Also published as: CN110067773A

Abstract

The invention discloses an impeller, a fan and a range hood, and relates to the technical field of range hoods. The impeller comprises a wheel disc and a plurality of blades, and the blades are uniformly distributed along the circumferential direction of the wheel disc to form a cylindrical structure; the blade includes first spiral section, interlude and the second spiral section that connect gradually along the axial of rim plate, and first spiral section is connected with the rim plate, and the spiral direction of first spiral section and second spiral section is opposite. The blades of the impeller are of a three-section structure, the first spiral section and the second spiral section which are positioned at two sides are spiral blades, the rotation directions of the first spiral section and the second spiral section are opposite, when the impeller rotates, the spiral blades at two ends can promote the gas at two sides to continuously gather towards the middle part of the blades, the negative pressure, the air quantity and the air pressure of the impeller are increased, and the requirements of users on the air pressure and the air quantity are met; after the gas gathers towards the middle part of blade, can promote the gas to radially flow at the blade middle part, improve the outward exhaust effect of impeller for it is more smooth and easy to discharge fume.

Description

Impeller, fan and range hood

Technical Field

The invention relates to the technical field of range hoods, in particular to an impeller, a fan and a range hood.

Background

With the improvement of living standard, the requirements of people on living quality are correspondingly improved, and the range hood is taken as an important component of kitchen appliances, and becomes a key appliance in kitchen appliances for purifying kitchen environment and improving the use experience of a user of the range hood.

Wind pressure is an important parameter of the range hood, is an important index for measuring the service performance of the range hood, and is one of focuses of attention of users. The air duct system is used as a core component of smoke exhaust of the range hood, has great influence on smoke exhaust effect and increase of wind pressure of the range hood, and the impeller is a core component of the air duct system, which influences wind pressure of a fan. Because the floor is higher, the smoke exhaust pipe is longer, the distance from the public flue is longer, and the like, the wind pressure requirement of a user on the range hood is increasingly increased, and the wind pressure provided by the existing impeller is lower, the wind quantity is smaller, so that the range hood is easy to generate unsmooth smoke exhaust, insufficient wind pressure and disordered airflow direction in the actual use process, and the problems of high noise and the like are caused.

Disclosure of Invention

The invention aims to provide an impeller which can effectively increase negative pressure, promote gas to continuously gather towards the middle of the impeller and is beneficial to improving wind pressure and wind quantity generated by the impeller.

To achieve the purpose, the invention adopts the following technical scheme:

An impeller, comprising:

A wheel disc; and

The blades are uniformly distributed along the circumferential direction of the wheel disc to form a cylindrical structure;

The blade comprises a first spiral section, a middle section and a second spiral section which are sequentially connected along the axial direction of the wheel disc, wherein the first spiral section is connected with the wheel disc, and the spiral directions of the first spiral section and the second spiral section are opposite.

Wherein, the intermediate section is the arc.

Wherein the central angle a of the arc-shaped plate is 25-30 degrees. The central angle a of the arc-shaped plate can be 25 degrees, 26 degrees, 27 degrees, 28 degrees, 29 degrees and 30 degrees.

Wherein, the radial included angle b between the middle section and the corresponding position of the cylindrical structure is 25-30 degrees. The included angle b between the radial direction of the corresponding position of the middle section and the cylindrical structure can be 25 degrees, 26 degrees, 27 degrees, 28 degrees, 29 degrees and 30 degrees.

The length ratio of the first spiral section, the middle section and the second spiral section along the axial direction of the wheel disc is 1:2:1.

Wherein, the impeller still includes:

and the fixed ring is connected with the second spiral section, and the blades are positioned between the fixed ring and the wheel disc.

Wherein, the impeller still includes:

the support ring is arranged between the fixed ring and the wheel disc, and the support ring is connected with two adjacent blades.

The number of the supporting rings is two, one supporting ring is positioned at the joint of the middle section and the first spiral section, and the other supporting ring is positioned at the joint of the middle section and the second spiral section.

The invention further aims to provide a fan which can effectively increase negative pressure and increase air quantity and has a good using effect.

To achieve the purpose, the invention adopts the following technical scheme:

the fan comprises a volute, wherein the volute is provided with an air inlet and an air outlet, the fan further comprises the impeller, and the impeller is positioned in the volute.

Still another object of the present invention is to provide a range hood, in which the wind pressure and the wind volume of the air duct system of the range hood are large, and the smoke is discharged more smoothly.

To achieve the purpose, the invention adopts the following technical scheme:

a range hood comprises an air duct system, wherein the air duct system comprises the fan.

The beneficial effects are that: the blades of the impeller provided by the invention are of a three-section structure, the first spiral section and the second spiral section which are positioned at the two sides are of spiral blade structures, the rotation directions of the first spiral section and the second spiral section are opposite, and when the impeller rotates, the spiral blade structures at the two ends can promote the gas at the two sides to continuously gather towards the middle part of the blade, so that the negative pressure generated by the impeller is increased, the air conveying quantity and the air pressure of the impeller are effectively increased, the impeller has better use effect, and the requirements of users on the air pressure and the air quantity are met; after the gas gathers towards the middle part of blade, can promote gas to radially flow at the blade middle part, improve the outwards exhaust effect of impeller for range hood discharges fume more smoothly, improves user's use experience.

Drawings

FIG. 1 is a schematic view of an impeller according to the present invention;

FIG. 2 is a front view of an impeller provided by the present invention;

FIG. 3 is a cross-sectional view of an impeller A-A provided by the present invention;

FIG. 4 is a front view of a blower provided by the present invention;

fig. 5 is a schematic structural diagram of a fan provided by the invention.

Wherein:

100. A blower;

110. A volute; 111. an air inlet; 112. an air outlet;

120. an impeller; 121. a wheel disc; 122. a blade; 1221. a first helical segment; 1222. an intermediate section; 1223. a second helical segment; 123. a fixing ring; 124. a support ring;

a. Central angle of arc plate; b. and a radial included angle between the middle section and the corresponding position of the cylindrical structure.

Detailed Description

In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the invention more clear, the technical scheme of the invention is further described below by a specific embodiment in combination with the attached drawings.

As shown in fig. 1-3, the present embodiment provides an impeller 120, and the impeller 120 can be applied to a fan 100 of a range hood to suck and discharge smoke into and from an air duct system of the range hood to purify a kitchen environment.

As shown in fig. 1, the impeller 120 includes a wheel disc 121 and a plurality of blades 122, the plurality of blades 122 are disposed on one side of the wheel disc 121, two adjacent blades 122 are disposed in parallel, and the plurality of blades 122 are disposed at uniform intervals along a circumferential direction of the wheel disc 121, so as to form a cylindrical structure, and one end of the cylindrical structure is open. When the wheel disc 121 rotates, the blades 122 are driven to rotate, so that gas near the impeller 120 is sucked into the cylindrical structure through the openings of the cylindrical structure, and negative pressure is formed at the positions of the openings, so that the gas is forced to continuously enter the cylindrical structure. The gas entering the tubular structure flows out through the gaps between the vanes 122, thereby promoting the flow of gas.

Because the flow of the gas in the impeller 120 is converted from axial to radial, the gas entering the cylindrical structure flows out mainly through radial flow, and the radial airflow is concentrated mainly near the middle of the blades 122, so as to improve the smoking capability and the smoke discharging capability of the impeller 120, the blades 122 in this embodiment adopt a three-stage structure. Specifically, as shown in fig. 2, the blade 122 includes a first spiral section 1221, a middle section 1222, and a second spiral section 1223 sequentially connected in the axial direction of the wheel disc 121, the first spiral section 1221 being connected to the wheel disc 121, and the first spiral section 1221 and the second spiral section 1223 having opposite directions of rotation. The first spiral section 1221 and the second spiral section 1223 are both spiral blade structures, when the gas enters the cylindrical structure, the spiral blade structures can form axial thrust to the gas, so that the gas is extruded to the middle section 1222 in a bidirectional manner under the axial thrust action of the first spiral section 1221 and the second spiral section 1223, even if the gas gathers towards the middle section 1222, the negative pressure at the opening position can be increased, and the air quantity and the air pressure of the impeller 120 can be increased, so that the use requirement of a user can be met. After the gas gathers together to the intermediate section 1222, the radial conveying of the gas is completed in the intermediate section 1222, the gas flows out from the gaps between the adjacent blades 122, so that the gas flow in the impeller 120 can be rectified, the turbulence of the gas flow in the cylindrical structure is avoided, the noise in the working process of the impeller 120 is reduced, and the use experience of a user is improved.

To further enhance the rectifying action of the intermediate section 1222 on the radial air flow, as shown in fig. 3, the intermediate section 1222 may be an arc-shaped plate, which may reduce interference with the direction of the air flow in the intermediate portion, and avoid the air flow from forming vortex, thereby reducing noise when the impeller 120 is operated. The central angle a of the arc plate can be 25 degrees to 30 degrees, the central angle a of the arc plate is not too large, the radial airflow passing is affected by the fact that the central angle a of the arc plate is too large, the guiding effect of the arc plate on the airflow is affected by the fact that the central angle a of the arc plate is too small, and therefore the rectifying effect of the intermediate section 1222 on the radial airflow is affected. In this embodiment, the central angle a of the arcuate plate is preferably 27 °.

In order to prevent the gas from flowing from the first spiral section 1221 and the second spiral section 1223 to the middle section 1222, the middle section 1222 encounters to cause the gas flow to stir, so that the gas flow is disordered, the length ratio of the first spiral section 1221, the middle section 1222 and the second spiral section 1223 along the axial direction of the wheel disc 121 may be 1:2:1, so as to avoid the gas flows on both sides colliding with each other in the middle section 1222, so that the gas flow is stable, the rectification effect of the middle section 1222 on the gas flow is facilitated, and the gas flow is smoother.

To make the structure of the impeller 120 more stable, the impeller 120 is conveniently assembled into the blower 100, and as shown in fig. 1 and 2, the impeller 120 further includes a fixing ring 123. The retaining ring 123 is connected to the second helical segment 1223 and positions the blades 122 between the retaining ring 123 and the wheel disc 121.

In order to avoid the shaking of the blades 122 during the rotation process, a supporting ring 124 is further disposed between the fixing ring 123 and the wheel disc 121, and the supporting ring 124 connects two adjacent blades 122, thereby fixing the distance between the adjacent blades 122 and improving the stability of the impeller 120. In this embodiment, two support rings 124 are provided, wherein one support ring 124 is disposed at the connection between the middle section 1222 and the first spiral section 1221, and the other support ring 124 is disposed at the connection between the middle section 1222 and the second spiral section 1223, so that the support ring 124 can improve the structural strength of the vane 122, and ensure the guiding effect of the vane 122 on the airflow.

As shown in fig. 4 and 5, the present embodiment further provides a fan 100, the fan 100 includes a volute 110 and the impeller 120, the volute 110 includes an air inlet 111 and an air outlet 112, the air inlet 111 is disposed along an axial direction of the volute 110, the air outlet 112 is disposed along a radial direction of the volute 110, the impeller 120 is disposed in the volute 110, and an opening of a cylindrical structure formed by the blades 122 is communicated with the air inlet 111.

The outer contour line of the spiral case 110 is in spiral line distribution, an air outlet channel is formed between the spiral case 110 and the impeller 120, and after air flow enters the tubular structure from the air inlet 111, the air flow enters the air outlet channel through radial flow, and is discharged from the air outlet 112 through the air outlet channel.

To improve the smoothness of the air outlet of the fan 100, the air outlet 112 of the fan 100 is generally not vertically upward, i.e. the air outlet channel of the fan 100 is arranged along a spiral line, and to improve the smoothness of the air flow flowing radially by the impeller 120, a certain included angle is formed between the middle section 1222 and the cylindrical structure in the radial direction, so that the air flow is parallel to the air outlet direction of the fan 100 along the radial flowing direction. As shown in fig. 3, in the present embodiment, an included angle b between the middle section 1222 and a radial direction of a corresponding position of the cylindrical structure is 25 ° -30 °, and the radial direction of the corresponding position is the radial direction of the connecting point of the middle section 1222 and the cylindrical structure. In this embodiment, the included angle b between the middle section 1222 and the corresponding position of the cylindrical structure in the radial direction is preferably 29 °.

The embodiment also provides a range hood, which comprises an air duct system, wherein the air duct system comprises the fan 100, the fan 100 can improve the wind pressure and the air conveying quantity of the air duct system so as to meet the high wind pressure requirement required by the existing reasons of higher floors, longer smoke exhaust pipes, longer distance from a public flue and the like, the smoking efficiency of the range hood is improved, and the fan 100 can also stabilize the air flow direction in the air duct system and reduce the noise of the range hood.

The foregoing is merely exemplary of the present invention, and those skilled in the art should not be considered as limiting the invention, since modifications may be made in the specific embodiments and application scope of the invention in light of the teachings of the present invention.

Claims

1. An impeller, comprising:

A wheel disc (121); and

A plurality of blades (122), wherein the blades (122) are uniformly arranged at intervals along the circumferential direction of the wheel disc (121) to form a cylindrical structure;

The blade (122) comprises a first spiral section (1221), a middle section (1222) and a second spiral section (1223) which are sequentially connected along the axial direction of the wheel disc (121), wherein the first spiral section (1221) is connected with the wheel disc (121), and the rotation directions of the first spiral section (1221) and the second spiral section (1223) are opposite.

2. The impeller of claim 1, wherein the intermediate section (1222) is an arcuate plate.

3. An impeller according to claim 2, wherein the radius angle a of the arcuate plate is 25 ° -30 °.

4. The impeller of claim 2, wherein the radial included angle b of the intermediate section (1222) with respect to the cylindrical structure is 25 ° -30 °.

5. The impeller of claim 1, wherein the first helical section (1221), the intermediate section (1222), and the second helical section (1223) have a length ratio of 1:2:1 along an axial direction of the wheel disc (121).

6. The impeller of claim 1, wherein the impeller (120) further comprises:

-a fixing ring (123), said fixing ring (123) being connected to said second helical section (1223), said blades (122) being located between said fixing ring (123) and said wheel disc (121).

7. The impeller of claim 6, wherein the impeller (120) further comprises:

And the supporting ring (124), the supporting ring (124) is arranged between the fixed ring (123) and the wheel disc (121), and the supporting ring (124) is connected with two adjacent blades (122).

8. The impeller of claim 7, wherein the number of support rings (124) is two, one support ring (124) being located at the junction of the intermediate section (1222) with the first helical section (1221) and the other support ring (124) being located at the junction of the intermediate section (1222) with the second helical section (1223).

9. A fan comprising a volute (110), the volute (110) being provided with an air inlet (111) and an air outlet (112), characterized in that the fan (100) further comprises an impeller (120) according to any one of claims 1-8, the impeller (120) being located in the volute (110).

10. A range hood comprising an air duct system, characterized in that the air duct system comprises a fan (100) according to claim 9.