WO2021036485A1

WO2021036485A1 - Range hood

Info

Publication number: WO2021036485A1
Application number: PCT/CN2020/099074
Authority: WO
Inventors: 陈锦汾; 邓志敏; 王宏; 孔祥凯; 冯圆通; 张皓坤; 庞宗莉; 冯展翊
Original assignee: 珠海格力电器股份有限公司
Priority date: 2019-08-29
Filing date: 2020-06-30
Publication date: 2021-03-04
Also published as: CN110529901A

Abstract

A range hood, comprising a front dynamic filter screen (22), which is provided on an output shaft of a double shaft motor (2) and which is located between a centrifugal wind wheel (3) and a concave edge (231) of a front oil guide ring (23). The distance between the concave edge (231) of the front oil guide ring (23) and the centrifugal wind wheel (3) is L1, and the value of the distance ΔL1 from the front dynamic filter screen (21) to the centrifugal wind wheel (3) is [0.45L1, 0.85L1]. When the range hood is in operation, air carrying soot that is suctioned by the front oil guide ring (23) is guided by the concave edge (231) of the front oil guide ring (23) and then impacts the front dynamic filter screen (21). Part of the air is blocked by a dynamic filter screen (21, 22) and moves around the dynamic filter screen (21, 22) along the surface of the dynamic filter screen (21, 22). The air moving along the surface of the dynamic filter screen (21, 22) continuously enters a volute (1) by means of the dynamic filter screen (21, 22) during movement, and finally a certain amount of air passes through a gap between the front dynamic filter screen (21) and an inner wall of the front oil guide ring (23). The value of the distance ΔL1 from the front dynamic filter screen to the centrifugal wind wheel is [0.45L1, 0.85L1]. The volume of air passing between the front dynamic filter screen (21) and the inner wall of the front oil guide ring (23) may be adjusted, thereby reducing the noise generated by the front dynamic filter screen (21).

Description

Range hood

This disclosure claims the priority of a Chinese patent application filed with the Chinese Patent Office on August 29, 2019, with an application number of 201910822063.8 and an invention title of "a range hood", the entire content of which is incorporated into this disclosure by reference.

Technical field

The present disclosure relates to the technical field of a range hood structure, in particular to a range hood.

Background technique

With the improvement of living standards, the range hood is an important kitchen appliance. In addition to the basic performance of the range hood, users also pay special attention to the cleaning of the range hood, such as: no disassembly and washing, self-cleaning, etc.

As shown in FIG. 1, the dynamic filter type range hood includes a volute assembly 1, and the volute assembly 1 is provided with two oppositely arranged air inlets 11 and an air outlet 12.

The volute assembly 1 is provided with a centrifugal wind wheel 3, and the centrifugal wind wheel 3 is controlled by a biaxial motor 2. The biaxial motor 2 is fixed in the volute assembly 1 by a fixing frame 13. The fixing frame 13 is fixed on the air inlet 11 on the rear side. The two-axis motor 2 respectively extends its output shaft toward the two air inlets 11.

The two air inlets 11 are respectively provided with a front dynamic filter 21 and a rear dynamic filter 22, and the front dynamic filter 21 and the rear dynamic filter 22 are respectively connected to the two output shafts.

A front oil guide ring 23 is provided on the side of the front dynamic filter 21 away from the volute assembly 1. The front oil guide ring 23 is fixed on the volute assembly 1, and the inner ring of the front oil guide ring 23 is bent toward the volute assembly 1 to guide the airflow Enter the concave edge of the leading oil ring of the air inlet 11.

A rear oil guide ring 24 is provided on the side of the rear dynamic filter screen 21 away from the volute assembly 1. The rear oil guide ring 24 is fixed on the volute assembly 1, and the inner ring of the rear oil guide ring 24 is bent toward the volute assembly 1 The concave edge of the rear oil guide ring that guides the gold flow into the air inlet 11 is formed.

The front dynamic filter screen 21 is located between the concave edge of the front oil guide ring and the centrifugal wind wheel 3, and the rear dynamic filter screen 22 is located between the concave edge of the rear oil guide ring and the centrifugal wind wheel 3.

When the range hood is working, the dual-axis motor drives the front dynamic filter 21 and the rear dynamic filter 22 to rotate at the same time, and the centrifugal wind wheel 3 also rotates at the same time, and drives the oil smoke to enter from the air inlets 11 on both sides. The front dynamic filter 21 and the rear dynamic filter 22 are constantly impacted by the airflow and vibrate, thereby generating relatively large noise.

Summary of the invention

Therefore, the technical problem to be solved by the present disclosure is to overcome the large noise of the range hood in the related art, thereby providing a range hood.

A range hood, including:

The front dynamic filter is located on the output shaft of the double-shaft motor, between the centrifugal wind wheel and the concave edge of the front oil guide ring;

The distance between the concave edge of the leading oil ring and the centrifugal wind wheel is L1, and the value of the distance ΔL1 from the front dynamic filter to the centrifugal wind wheel is [0.45L1,0.85L1].

Also includes:

The rear dynamic filter screen is arranged on the other output shaft of the biaxial motor, and the rear dynamic filter screen is located between the centrifugal wind wheel and the concave edge of the rear oil guide ring.

The two output shafts of the dual-axis motor have different lengths, the front dynamic filter screen is arranged on the longer output shaft of the dual-axis motor, and the rear dynamic filter screen is arranged on the shorter output shaft of the dual-axis motor. On the output shaft.

The distance between the concave edge of the rear oil guide ring and the centrifugal wind wheel is L2, and the value of the distance ΔL2 from the rear dynamic filter to the centrifugal wind wheel is [0.1L2, 0.6L2].

The value of ΔL2 is 0.43L2.

The value of ΔL1 is 0.46L1.

The value of L1 is less than the value of L2, and the ratio of L1 to L2 is 0.82.

The rear oil guide ring is connected to the volute assembly through a connecting flange, the radius of the concave side of the rear oil guide ring is R1, the connecting flange fits the volute assembly, and the connecting flange The radius of the inner ring is R2, and the radius of the rear dynamic filter is [R1, 0.9R2].

The technical solution of the present disclosure has the following advantages:

1. The range hood provided by the present disclosure includes: a front dynamic filter screen, which is arranged on the output shaft of the double-shaft motor and is located between the centrifugal wind wheel and the concave edge of the front oil guide ring; the concave edge of the front oil guide ring and the The distance between the centrifugal wind wheels is L1, and the value of the distance ΔL1 from the front dynamic filter to the centrifugal wind wheels is [0.45L1,0.85L1].

When the range hood is working, the air with oil fume sucked in by the front oil guide ring is guided by the concave edge of the front oil guide ring and impacts on the front dynamic filter screen. Part of the air is sucked into the volute assembly through the mesh of the front dynamic filter, and part of the air is blocked by the dynamic filter and moves around the dynamic filter along the surface of the dynamic filter. Among them, the entire range hood has a shell. The dynamic filter position in this solution changes, that is, when the value of △L1 changes, the distance between the filter screen and the shell of the range hood changes. When the distance between the net and the casing of the range hood becomes larger, the air volume sucked in becomes larger, and the change of the air volume will cause a change in the size of the noise generated by the work. In this scheme, the value of △L1 is [0.45L1,0.85L1]. Under the premise of ensuring the air intake, the working noise is reduced to a greater extent.

2. The range hood provided by the present disclosure further includes: a rear dynamic filter, which is arranged on the other output shaft of the dual-shaft motor, and the rear dynamic filter is located between the centrifugal wind wheel and the rear oil guide Between the concave sides of the ring.

The front dynamic filter screen and the rear dynamic filter screen work together, and the wind with oil fume is sucked from both sides of the volute assembly, which improves the working efficiency of the range hood and improves the efficiency of oil filtering.

3. In the range hood provided by the present disclosure, the distance between the concave edge of the rear oil guide ring and the centrifugal wind wheel is L2, and the value of the distance △L2 from the rear dynamic filter to the centrifugal wind wheel is L2 [0.1L2,0.6L2].

When the range hood is working, the air with oil fume sucked in by the rear oil guide ring will impact on the rear dynamic filter after being guided by the concave edge of the rear oil guide ring. Part of the air passes through the meshes of the dynamic filter screen and is sucked into the volute assembly, and part of the air is blocked by the dynamic filter screen and moves around the dynamic filter screen along the surface of the dynamic filter screen. The air moving along the surface of the dynamic filter screen continuously penetrates the filter screen into the volute during the movement, and finally a certain amount of air still passes through the gap between the rear dynamic filter screen and the inner wall of the rear oil guide ring. Among them, the entire range hood has a shell. The dynamic filter position in this solution changes, that is, when the value of △L2 changes, the distance between the filter screen and the shell of the range hood changes. When the distance between the net and the casing of the range hood becomes larger, the air volume sucked in becomes larger, and the change of the air volume will cause a change in the size of the noise generated by the work. In this scheme, the value of △L2 is [0.1L2, 0.6L2]. Under the premise of ensuring the air intake, the working noise is reduced to a greater extent.

5. In the range hood provided by the present disclosure, the value of ΔL2 is 0.43L2.

Experimental data shows that when the value of △L2 is 0.43L2, the air intake is relatively larger, the noise generated by the work is relatively lower, and the noise generated by the range hood is further reduced.

6. In the range hood provided by the present disclosure, the value of ΔL1 is 0.46L1.

By reducing the noise generated by the front dynamic filter screen, the noise generated by the range hood is further reduced.

7. In the range hood provided by the present disclosure, the value of L1 is less than the value of L2, and the ratio of L1 to L2 is 0.82.

8. In the range hood provided by the present disclosure, the rear oil guide ring is connected to the volute assembly through a connecting flange, the radius of the concave side of the rear oil guide ring is R1, and the connecting flange fits the For the volute assembly, the radius of the inner ring of the connecting flange is R2, and the radius of the rear dynamic filter is [R1, 0.9R2].

Because the inner wall of the front oil guide ring and the rear oil guide ring facing the dynamic filter screen are arc-shaped, so when the values of △L1 and △L2 change, the front dynamic filter screen and the rear dynamic filter screen will reach the inner wall of the front oil guide ring or the rear oil guide ring. The distance of the inner wall of the ring is constantly changing. The radius change of the rear dynamic filter in this solution results in a sufficient distance between the edge of the rear dynamic filter and the inner wall of the rear oil guide ring for airflow to pass through, so as to reduce the direct impact of the airflow on the filter. The pressure, thereby reducing noise generation.

Description of the drawings

In order to more clearly explain the technical solutions in the specific embodiments of the present disclosure or related technologies, the following will briefly introduce the drawings that need to be used in the specific embodiments or related technical descriptions. Obviously, the drawings in the following description are For some of the embodiments of the present disclosure, for those of ordinary skill in the art, other drawings may be obtained based on these drawings without creative work.

Figure 1 is a schematic diagram of the background technology;

Figure 2 is a schematic diagram showing the front view of the volute assembly from the direction of the rear dynamic filter;

Fig. 3 is a cross-sectional view showing the installation position of the dynamic filter at A-A in Fig. 2.

Description of reference signs:

1. Volute assembly; 11. Air inlet; 12. Air outlet; 13. Fixed frame; 2. Two-axis motor; 21. Front dynamic filter; 22. Rear dynamic filter; 23. Leading oil ring; 231. Leading Oil ring concave edge; 24. Rear oil guide ring; 241. Rear oil guide ring concave edge; 242. Connecting flange; 3. Range hood housing.

detailed description

The technical solutions of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present disclosure.

In the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the pointed device or element must have a specific orientation or a specific orientation. The structure and operation cannot therefore be construed as a limitation of the present disclosure. In addition, the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, they can be fixed or detachable. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above-mentioned terms in the present disclosure can be understood in specific situations.

In addition, the technical features involved in the different embodiments of the present disclosure described below can be combined with each other as long as they do not conflict with each other.

Example 1

The range hood provided by the present disclosure includes: a front dynamic filter 21, which is arranged on the output shaft of the double-shaft motor 2 and is located between the centrifugal wind wheel and the concave edge of the front oil guide ring 231; the concave edge of the front oil guide ring 231 and the centrifugal wind The distance between the wheels is L1, and the value of the distance ΔL1 from the front dynamic filter 21 to the centrifugal wind wheel is [0.45L1,0.85L1]. When the range hood is working, the air with oil fume sucked in by the front oil guide ring 23 is guided by the concave edge of the front oil guide ring 231 and impacts on the front dynamic filter 21. Part of the air is sucked into the volute assembly 1 through the mesh on the front dynamic filter 21, and some of the air is blocked by the dynamic filter and moves around the dynamic filter along the surface of the dynamic filter. Among them, the entire range hood has a shell. The dynamic filter position in this embodiment changes, that is, when the value of △L1 changes, the distance between the filter screen and the shell of the range hood changes. When the distance between the filter screen and the casing of the range hood becomes larger, the air volume sucked in becomes larger, and the change of the air volume will cause a change in the noise level during the work. In this scheme, the value of △L1 is [0.45L1,0.85L1]. Under the premise of ensuring the air intake, the working noise is reduced to a greater extent.

The connection relationship between the front dynamic filter 21 and the output shaft of the dual-axis motor 2 is not specifically limited. In this embodiment, as shown in Figures 1 and 3, the front dynamic filter 21 is detachably connected to the dual-axis motor 2 On the output shaft. As an alternative embodiment, the front dynamic filter 21 is integrally connected with the output shaft of the biaxial motor 2.

The connection structure of the front dynamic filter 21 and the dual-axis motor 2 is not specifically limited. In this embodiment, the front dynamic filter 21 and the output shaft of the dual-axis motor are connected through a front connecting seat, and the front connecting seat is fixed by screws. At the end of the output shaft of the dual-axis motor 2, the front dynamic filter 21 is connected to the connecting seat by screws.

There are no specific restrictions on the structure of the range hood. In this embodiment, as shown in FIG. 3, it also includes a rear dynamic filter 22, which is arranged on the other output shaft of the biaxial motor 2, and the rear dynamic filter 22 is located in the centrifugal unit. Between the wind wheel and the concave edge 241 of the rear oil guide ring. The front dynamic filter 21 and the rear dynamic filter 22 work together, and the wind with oil fume is sucked in from both sides of the volute assembly 1 to improve the working efficiency of the range hood and improve the efficiency of oil filtering. As an alternative embodiment, the volute has only one air inlet 11 and the front dynamic filter 21 is provided on the air inlet 11.

There is no specific restriction on the installation position of the rear dynamic filter 22. In this embodiment, as shown in FIG. 3, the distance between the concave edge of the rear oil guide ring 241 and the centrifugal wind wheel is L2, and the rear dynamic filter 22 reaches the centrifugal rotor. The value of the distance of the wind wheel △L2 is [0.1L2, 0.6L2]. When the range hood is working, the air with oil fume sucked in by the rear oil guide ring 24 is guided by the concave edge of the rear oil guide ring 241 and impacts on the rear dynamic filter 22. Part of the air passes through the mesh holes on the dynamic filter 22 and is sucked into the volute assembly 1, and part of the air is blocked by the dynamic filter and moves around the dynamic filter along the surface of the dynamic filter. The air moving along the surface of the dynamic filter screen continuously penetrates the filter screen into the volute during the movement, and finally a certain amount of air still passes through the gap between the rear dynamic filter screen 22 and the inner wall of the rear oil guide ring 24. Among them, the entire range hood has a shell. The dynamic filter position in this embodiment changes, that is, when the value of △L2 changes, the distance between the filter screen and the shell of the range hood changes. When the distance between the filter screen and the casing of the range hood becomes larger, the air volume sucked in becomes larger, and the change of the air volume will cause a change in the noise level during the work. In this scheme, the value of △L2 is [0.1L2, 0.6L2]. Under the premise of ensuring the air intake, the working noise is reduced to a greater extent.

Among them, the value of △L2 is selected as 0.43L2. By reducing the noise generated when the rear dynamic filter 22 is working, the noise generated when the range hood is working is further reduced. The value of △L1 is selected as 0.46L1. By reducing the noise generated by the front dynamic filter 21 during operation, the noise generated by the range hood during operation is further reduced.

The specific relationship between the values of L1 and L2 is not limited. In this embodiment, the value of L1 is smaller than the value of L2, and the ratio of L1 to L2 is 0.82.

There is no specific restriction on the structure of the oil guide ring. In this embodiment, in conjunction with Figures 2 and 3, the rear oil guide ring 24 is connected to the volute assembly 1 through the connecting flange 242, and the radius of the concave side 241 of the rear oil guide ring is R1. , The connecting flange 242 fits the volute assembly 1, the inner ring radius of the connecting flange 242 is R2, and the radius of the rear dynamic filter 22 is [R1, 0.9R2]. Because the inner walls of the front oil guide ring 23 and the rear oil guide ring 24 are curved, so when the values of △L1 and △L2 change, the front dynamic filter 21 and the rear dynamic filter 22 reach the inner wall of the front oil guide ring 23 or the rear guide The distance between the inner wall of the oil ring 24 is constantly changing. In this embodiment, the radius of the rear dynamic filter screen changes, resulting in a sufficient distance between the edge of the rear dynamic filter screen and the inner wall of the rear oil guide ring for air to pass through, so as to reduce the direct flow of the filter screen. By the impact of the airflow pressure, thereby reducing noise generation.

There is no specific restriction on the selection of specific numerical values of ΔL1 and ΔL2. In this embodiment, the specific numerical values of ΔL1 and ΔL2 are selected according to the results of simulation experiments.

The range hood in the simulation experiment is a tower hood, which has a range hood shell, and the inside of the range hood shell has volutes with air intake on both sides, so the air inlet ducts on both sides are provided with front dynamic filters 21 and After the dynamic filter 22 two filters. Among them, since the thickness of the dynamic filter screen is small, the dynamic filter screen is simplified without considering the thickness of the filter screen. The number of grids divided by the finite element is 11.6 million, the rotating speed set by the dynamic filter and the centrifugal wind wheel is 930 rpm, and the number of iterative calculation steps is 5000 steps, thereby obtaining relatively stable air intake data.

Among them, the dual-axis motor 2 is a universal part, the thickness of the motor itself is 73mm, and the motor plays a certain role in diversion. The front dynamic filter 21 and the rear dynamic filter 22 are respectively installed at the ends of the two output shafts of the dual-axis motor 2. At this time, the value of L1 is 13mm, the value of L2 is 16mm, the value of △L1 is 0.65L1, and the value of △L2 is 0.28L2. Take this set of data as the basic data of the first set of experiments, change △L1 and The value of △L2 observes the numerical change of the air intake and noise.

In the second set of experiments, the value of L1 is 13mm, the value of L2 is 16mm, the value of △L1 is 0.54L1, and the value of △L2 is 0.37L2;

In the third set of experiments, the value of L1 is 13mm, the value of L2 is 16mm, the value of △L1 is 0.46L1, and the value of △L2 is 0.44L2;

In the fourth set of experiments, the value of L1 is 13mm, the value of L2 is 16mm, the value of △L1 is 0.35L1, and the value of △L2 is 0.53L2;

In the fifth set of experiments, the value of L1 is 13mm, the value of L2 is 16mm, the value of △L1 is 0.46L1, and the value of △L2 is 0.43L2. Refer to Figure 6-9 for the airflow velocity vector diagram during the simulation of the above five sets of experiments, and the experimental results are shown in the following table:

Table 1 Simulation data of each scheme

Combined with the experimental data in Table 1, when the dynamic filter is close to the range hood housing, the air flow space becomes narrower, resulting in a decrease in air volume. On the contrary, as shown in the fourth set of experimental data, when △L1 becomes smaller and △L2 becomes larger, it means that the distance between the front and rear dynamic filters and the casing of the range hood becomes larger, and the air volume of the inlet air increases significantly. However, the noise generated is correspondingly the largest, and a large eddy current area appears behind the dynamic filter.

Properly move the front and rear dynamic filters 22 by 1.5 mm in the direction close to the range hood housing to obtain the data of the third set of experiments. The air volume and noise are reduced, and the vortex area disappears.

Further adjust the position of the filter, the second set of experimental data, the air volume and noise are further reduced, and no vortex area is formed.

On the basis of the first set of experiments, the motor shaft is shortened by 5mm, that is, the output shafts at both ends of the dual-axis motor 2 are shortened by 2.5mm respectively, and the front dynamic filter 21 and the rear dynamic filter 22 are respectively installed at the ends of the two output shafts. In order to obtain the fifth set of experimental data.

Compared with the first set of basic experimental data, in the fifth set of experiments, the value of △L1 is 0.46L1, and the value of △L2 is 0.43L2. At this time, the distance between the front dynamic filter 21 and the concave edge of the leading oil ring 23 is 7mm, the distance from the centrifugal wind wheel is 6mm; the rear dynamic filter 22 is 9mm away from the centrifugal wind wheel, and the distance from the concave edge of the rear oil guide ring 24 is 7mm. At this time, the air volume has been significantly increased, which is much larger than the air intake volume shown in the experimental data of the second to third groups, and the noise generated in the second to fourth groups of experiments is smaller.

Obviously, the foregoing embodiments are merely examples for clear description, and are not intended to limit the implementation manner. For those of ordinary skill in the art, other changes or modifications in different forms can be made on the basis of the above description. It is unnecessary and impossible to list all the implementation methods here. The obvious changes or changes derived from this are still within the scope of protection created by this disclosure.

Claims

A range hood, including:

The front dynamic filter screen (21) is arranged on the output shaft of the double-shaft motor (2), between the centrifugal wind wheel (3) and the concave edge (231) of the front oil guide ring;

The distance between the concave edge of the leading oil ring (231) and the centrifugal wind wheel (3) is L1, and the value of the distance ΔL1 from the front dynamic filter screen (21) to the centrifugal wind wheel (3) It is [0.45L1,0.85L1].
The range hood according to claim 1, further comprising:

The rear dynamic filter screen (22) is arranged on the other output shaft of the dual-shaft motor (2), and the rear dynamic filter screen (22) is located between the centrifugal wind wheel (3) and the rear oil guide ring Between the concave edges (241).
The range hood according to claim 2, wherein the two output shafts of the dual-axis motor (2) have different lengths, and the front dynamic filter (21) is arranged on the larger of the dual-axis motor (2). On the long output shaft, the rear dynamic filter (22) is arranged on the shorter output shaft of the double-shaft motor (2).
The range hood according to claim 2, wherein:

The distance between the concave edge of the rear oil guide ring (241) and the centrifugal wind wheel (3) is L2, and the distance between the rear dynamic filter (22) and the centrifugal wind wheel (3) is L2 The value is [0.1L2,0.6L2].
The range hood according to claim 4, wherein the value of ΔL2 is 0.43L2.
The range hood according to any one of claims 1 to 5, wherein the value of ΔL1 is 0.46L1.
The range hood according to any one of claims 1 to 5, wherein the value of L1 is less than the value of L2, and the ratio of L1 to L2 is 0.82.
The range hood according to any one of claims 1 to 5, wherein the rear oil guide ring (24) is connected to the volute assembly (1) through a connecting flange, and the concave edge ( The radius of 241) is R1, the connecting flange fits the volute assembly (1), the inner ring radius of the connecting flange (242) is R2, and the radius of the rear dynamic filter (22) is [R1,0.9R2].