CN217928919U

CN217928919U - Cooking fume remover

Info

Publication number: CN217928919U
Application number: CN202221459884.3U
Authority: CN
Inventors: 任富佳; 董豪炳; 于巍巍; 王嘉明; 黄文才; 钱金鑫
Original assignee: Hangzhou Robam Appliances Co Ltd
Current assignee: Hangzhou Robam Appliances Co Ltd
Priority date: 2022-06-09
Filing date: 2022-06-09
Publication date: 2022-11-29
Anticipated expiration: 2032-06-09

Abstract

The utility model discloses a range hood, which belongs to the technical field of household appliances and is designed for solving the problem of poor gas flow performance of the existing range hood. The utility model provides a range hood includes the spiral case, and the air outlet end of spiral case is including diffusion face and spiral tongue, and the spiral case is the slope setting around the rotatory angle of settlement of axis in air inlet to increase the horizontal distance between the vertical tangent line of spiral tongue and air intake. The utility model provides a spiral case of range hood is the slope setting around the axis rotation of air inlet after setting for the angle, has widened from the horizontal distance between the left vertical tangent line of volute tongue bottom to air intake, has increased the regional scope of the fluid domain effluence, helps promoting mobility, realizes high-efficient air-out.

Description

Cooking fume remover

Technical Field

The utility model relates to a household electrical appliances technical field especially relates to a range hood.

Background

The cooking fume exhauster is one electric appliance for exhausting fume produced during cooking indoors to outdoor. The main working principle is that the fan is used to generate air flow, so that the oil smoke is discharged along with the air flow. In order to make the air flow along a specified route, the range hood usually further includes a volute, a check valve and an exhaust pipe, the fan is disposed in the volute, one end of the check valve is connected to the volute, and the other end of the check valve is connected to the exhaust pipe. When the fan rotates, the airflow can be discharged outdoors after sequentially passing through the volute, the check valve and the exhaust pipe.

The existing volute is usually placed vertically, and the installation is convenient. The defects are as follows: the outflow area range is narrow, and the gas flow performance is poor; the vertical height of the volute can not be compressed, so that the overall volume of the range hood is large, and the miniaturization and the lightness and thinness of the range hood are not facilitated.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a range hood that gas flow performance is good.

To achieve the purpose, the utility model adopts the following technical proposal:

a range hood comprises a volute, wherein an air outlet end of the volute comprises a diffusion surface and a volute tongue, and the volute is obliquely arranged after rotating for a set angle around the axis of an air inlet so as to increase the horizontal distance S5 between the volute tongue and a vertical tangent line Q of the air inlet.

In a preferred embodiment, the range hood further includes a top plate, the top plate is disposed to be inclined with respect to a horizontal plane, and the air outlet end of the volute is connected to the top plate.

In one preferred embodiment, the top plate is inclined with respect to the horizontal by θ 2 e [5 °,15 ° ].

In a preferred embodiment, the range hood further includes a check valve, a bottom end of the check valve is connected to the air outlet end of the volute, and a top end surface of the check valve is horizontally arranged.

In one preferred embodiment, the top plate is integrally formed with the check valve.

In a preferred embodiment, the valve body of the check valve is cylindrical, the maximum contour curve of the valve body on the same side as the diffuser surface is a second contour curve L2, and the second contour curve L2 is tangent to the extension line of the diffuser surface.

In a preferred embodiment, the maximum contour curve of the valve body on the same side as the volute tongue is a first contour curve L1, and the first contour curve L1 is tangent to the extension line of the volute tongue.

In a preferred embodiment, a horizontal distance S1 between the center O1 of the top end surface and the center O of the air inlet is within a set range.

In a preferred embodiment, the range hood further comprises a box body, the volute is arranged in the box body, an outer wall of the box body, which is on the same side as the diffuser surface, protrudes outwards to form an avoiding groove, and the volute part is located in the avoiding groove.

In a preferred embodiment, a cutting surface is formed on the outer contour of the volute on the same side as the volute tongue, and the cutting surface is parallel to the side surface of the box body.

The utility model provides a spiral case of range hood is the slope setting around the axis rotation of air inlet after setting for the angle, has widened from the horizontal distance between the left vertical tangent line of volute tongue bottom to air intake, has increased the regional scope of the fluid domain effluence, helps promoting mobility, realizes high-efficient air-out.

Drawings

Fig. 1 is a schematic structural view of a range hood according to an embodiment of the present invention;

fig. 2 is a schematic structural view of the range hood after the box body is removed according to the embodiment of the present invention;

fig. 3 is a schematic structural diagram of two placement manners of the spiral case according to the embodiment of the present invention;

FIG. 4 is a longitudinal sectional view of a range hood according to an embodiment of the present invention;

fig. 5 is a longitudinal sectional view of the range hood after the box body is removed according to the embodiment of the present invention.

In the figure:

1. a volute; 2. a top plate; 3. a box body; 4. a check valve; 11. an air inlet; 12. a pressure expansion surface; 13. a volute tongue; 14. cutting the surface; 31. avoiding the groove; 41. a tip end face.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., 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 formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present application, unless expressly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the second feature or the first and second features may be indirectly contacting the second feature through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are for purposes of illustration only and do not denote a single embodiment.

The present embodiment provides a range hood. As shown in fig. 1 and fig. 2, the range hood includes a volute 1, a top plate 2, a box 3 and a check valve 4, the volute 1 and the top plate 2 are disposed in the box 3, and an air outlet end of the volute 1 is connected to the check valve 4. A fan (not shown) is arranged in the volute 1, and when the fan works, airflow can be generated in the volute 1, and indoor oil smoke is sucked and discharged to the outside by utilizing the negative pressure characteristic of the airflow. As shown in fig. 3 to 5, the air outlet end of the volute 1 includes a pressure expansion surface 12 and a volute tongue 13, and the volute 1 is inclined after rotating around the axis of the air inlet 11 by a set angle, so as to increase the horizontal distance S5 between the volute tongue 13 and the vertical tangent Q of the air inlet 11. The specific rotation angle of the volute 1 is not limited, and the horizontal distance S5 can be increased.

Fig. 3 shows a comparison of the two placement modes of the volute 1, in which the position of the axis is indicated by the point O. In fig. 3a, the volute 1 is normally placed, a line Q 'is a vertical tangent line on the left side of the air inlet 11, and a horizontal distance S5 from the bottom of the volute tongue 13 to the line Q' is the width of a fan impeller fluid domain outflow area; the spiral casing 1 in fig. 3b is rotated clockwise by a certain angle relative to the spiral casing 1 in fig. 3a to form an inclined state, and the line Q is a vertical tangent line on the left side of the air inlet 11. According to comparison, when the volute 1 is obliquely arranged, the horizontal distance S4 from the bottom of the volute tongue 13 to the line Q is larger than S5, the range of the outflow area of the fluid domain is increased, the fluidity is improved beneficially, and efficient air outlet is achieved.

As shown in fig. 1 and 2, the top plate 2 is disposed to be inclined with respect to the horizontal plane, and the air outlet end of the scroll casing 1 is connected to the top plate 2. The top plate 2 is used for fixedly mounting the volute 1, and the other is used for shielding the opening at the top of the box body 3. Namely, the air outlet end of the volute 1 is fixed in the box body 3 through the top plate 2, so that the volute 1 is stably installed; the air outlet end of the volute 1 is communicated with the check valve 4 to form an air flow channel.

As shown in fig. 4, the top plate 2 is inclined after rotating with the volute 1 by the same angle, which does not affect the normal connection between the volute 1 and the top plate 2. Under the unchangeable condition of 2 areas on the roof, compare in the level setting, the roof 2 width on the horizontal direction that the slope set up has diminished, is favorable to reducing the width of box 3, realizes the miniaturization of range hood.

The specific inclination angle of the top plate 2 is not limited, and the top plate 2 and the volute 1 are rotated to incline by the same angle to realize normal installation of the two. Preferably, as shown in fig. 5, the top plate 2 is inclined with respect to the horizontal plane by θ 2 ∈ [5 °,15 ° ], the range of the fluid domain outflow region reaches the maximum, the air-out efficiency is high, and the gas fluidity is good.

On the basis of the structure, as shown in fig. 4 and 5, the bottom end of the check valve 4 is connected to the air outlet end of the volute 1 in an inclined state, the connection structure is simple, a transition device does not need to be added between the air outlet end of the volute 1 and the bottom end of the check valve 4, the assembly and disassembly are convenient, and the processing cost is low. The top end face 41 of the check valve 4 is horizontally arranged, so that the check valve is convenient to connect with an exhaust pipe (not shown), air flow can realize vertical air outlet at the top end face 41, and the flow velocity loss is small.

If a conventional cylindrical check valve 4 with the bottom end arranged in parallel with the top end face 41 is adopted, when the bottom end is arranged obliquely, the cylinder wall of the check valve 4 extends along the axial direction of the air outlet end of the volute 1, the center O1 of the top end face 41 is far away from the center O of the air inlet 11, the air flow channel is too tortuous, the wind resistance is large, the noise is large, and the energy consumption is high.

As shown in fig. 5, the outer wall surface of the check valve 4 has a curved surface structure, and the top end surface 41 is horizontally arranged, so that the whole airflow passage in the check valve 4 is vertically upward, the wind resistance is small, and the noise is low. The horizontal distance S1 between the center O1 of the top end surface 41 and the center O of the air inlet 11 is within a predetermined range, preferably, the horizontal distance S1 ∈ [5mm,20mm ], and the specific value needs to be considered to avoid factors such as components and the like of an electrical box (not shown). In fig. 5, the point O1 is located on the left side of the point O, and in the actual product, the point O1 may also be located on the right side of the point O, so that the use effect is not affected.

The width of the top end face 41 and the height of the check valve 4 are not particularly limited and may be determined according to the size of the scroll casing 1 as long as the air flow resistance is reduced and the air flow performance is improved.

The check valve 4 has a cylindrical valve body, which is formed by connecting a plurality of curved surfaces in sequence. As shown in fig. 4 and 5, the most protruding curves on the left and right sides of the check valve 4 are the maximum contour curves, taking the axial extension direction of the air inlet 11 as the main viewing direction. In the present embodiment, the intersection between the valve body and the vertical cross section passing through the center O1 of the tip end surface 41 is the maximum profile curve.

The maximum profile curve of the valve body on the same side as the diffuser surface 12 is defined as a second profile curve L2, the second profile curve L2 being tangent to the extension of the diffuser surface 12. Stated another way, as shown in fig. 5, the diffusion angle of the outlet section of the volute is θ 3, the included angle between the tangent of the second profile L2 at the intersection with the volute 1 and the top plate 2 is θ 4, and θ 3+ θ 4=180 °. The specific value of θ 3 is not limited, and can be determined according to actual use requirements, for example, according to the power of the fan, whether the range hood is used in a light oil smoke environment or a heavy oil smoke environment, and other factors. In addition, the value of θ 3 is set by considering process errors, actual mounting effects, and the like, and a difference of ± 10 ° is allowed.

The maximum profile curve of the valve body on the same side as the volute tongue 13 is defined as a first profile curve L1, and the first profile curve L1 is tangent to the extension line of the volute tongue 13. Alternatively, as shown in fig. 5, the included angle between the volute tongue 13 and the top plate 2 is θ 5, the included angle between the bottom end of the first contour curve L1 and the plate 2 is θ 1, and θ 1= θ 5. The specific value of θ 5 is not limited, and can be determined according to actual use requirements, for example, according to the power of the fan, whether the range hood is used in a light oil smoke environment or a heavy oil smoke environment, and other factors. In addition, the value of θ 5 needs to be set in consideration of process errors, actual mounting effects, and the like, and a difference of ± 10 ° is allowed.

The second contour curve L2 is tangent to the extension line of the diffuser surface 12, the first contour curve L1 is tangent to the extension line of the volute tongue 13, the resistance of the gas entering the check valve 4 from the volute 1 is smaller, the flow loss caused by the change of the sectional area is weakened, the matching performance of the volute 1 and the check valve 4 is better, and the gas flows more smoothly.

The top plate 2 and the check valve 4 can be of a split structure, and are convenient to process. Roof 2 and check valve 4 also can integrated into one piece, and overall structure is more firm, can not lead to

roof

2 and 4 phase separations of check valve because of vibrating of fan, has reduced the fault probability of range hood.

On the basis of the above structure, as shown in fig. 1, 4 and 5, the casing 3 is cubic, an escape groove 31 is formed by protruding outward on the outer wall of the casing 3 on the same side as the diffuser 12, and the volute 1 is partially located in the escape groove 31. The width S3 of the avoiding groove 31 is preferably between 8mm and 12mm, so that the volute 1 can be completely accommodated, the occupied space can be reduced as much as possible to avoid interference with other surrounding devices, and the application range is wider.

The outer contour of the volute 1 on the same side with the volute tongue 13 is provided with a cutting surface 14, and the cutting surface 14 is parallel to the side surface of the box body 3. The arrangement of the cutting surface 14 does not influence the normal work of the fan and the exhaust of oil smoke carried by air flow, and on the basis, the transverse width of the volute 1 can be reduced, so that the side surface of the box body 3 is retracted, the transverse width of the box body 3 is reduced, and the miniaturization of the oil smoke exhauster is facilitated.

The fitting method of the curve and the curved surface according to the present embodiment, including but not limited to the curve and the curved surface on the volute 1 and the check valve 4, is not limited to a specific one, and is applicable to any fitting method used in the design of the existing range hood.

The structure of the volute 1, the top plate 2, the box body 3, the check valve 4 and the like are designed as a whole, and the problem that the performance of a single component cannot be upgraded to ensure that the combined oil fume exhauster can show more excellent working performance is solved. The volute 1, the top plate 2, the box body 3 and the check valve 4 which are obtained through linkage type structural design have the advantages of better overall performance in the aspect of gas flow, higher air outlet efficiency and lower noise.

Note that the above description is only for the preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. The range hood comprises a volute (1), wherein an air outlet end of the volute (1) comprises a diffusion surface (12) and a volute tongue (13), and the range hood is characterized in that the volute (1) rotates around the axis of an air inlet (11) by a set angle and then is obliquely arranged so as to increase the horizontal distance S5 between the volute tongue (13) and a vertical tangent Q of the air inlet (11).

2. The range hood as set forth in claim 1, further comprising a top plate (2), wherein the top plate (2) is disposed to be inclined with respect to a horizontal plane, and the air outlet end of the volute (1) is connected to the top plate (2).

3. The range hood according to claim 2, wherein the top plate (2) is inclined with respect to the horizontal plane by θ 2 e [5 °,15 °.

4. The range hood as set forth in claim 2, further comprising a check valve (4), wherein a bottom end of the check valve (4) is connected to an air outlet end of the volute (1), and a top end surface (41) of the check valve (4) is horizontally disposed.

5. The cooking fume exhauster according to claim 4, wherein the top plate (2) is integrally formed with the check valve (4).

6. The cooking fume exhauster according to claim 4, wherein the valve body of the check valve (4) is cylindrical, the maximum profile curve of the valve body on the same side as the diffuser surface (12) is a second profile curve L2, and the second profile curve L2 is tangent to the extension line of the diffuser surface (12).

7. The range hood according to claim 6, wherein the maximum profile curve of the valve body on the same side as the volute tongue (13) is a first profile curve L1, and the first profile curve L1 is tangent to the extension line of the volute tongue (13).

8. The range hood as claimed in claim 4, wherein a horizontal distance S1 between the center O1 of the top end surface (41) and the center O of the air inlet (11) is within a set range.

9. The range hood according to any one of claims 1 to 8, further comprising a box body (3), wherein the volute (1) is arranged in the box body (3), an outer wall of the box body (3) on the same side as the diffusion surface (12) protrudes outwards to form an avoiding groove (31), and the volute (1) is partially located in the avoiding groove (31).

10. The range hood according to claim 9, wherein a cutting surface (14) is formed on the outer contour of the volute (1) on the same side as the volute tongue (13), and the cutting surface (14) is parallel to the side surface of the box body (3).