Rectifier device for a range hood and range hood

Abstract

The present application relates to the field of electrical appliances, and provides a rectifying device for a range hood and the range hood. The rectifying device is adapted to be installed in a vertical smoke cavity of the range hood and is arranged downstream of an air inlet of the range hood in an air inlet direction. The rectifying device is formed with a first rectifying surface, a first vortex separation surface and a second vortex separation surface. The first rectifying surface is adapted to be arranged opposite to the air inlet and is inclined towards the vertical smoke cavity along the air inlet direction. The first vortex separation surface and the second vortex separation surface are respectively located on two sides of the first rectifying surface, and the first vortex separation surface and the second vortex separation surface are respectively adapted to be inclined and extended towards the vertical smoke cavity along a direction of approaching each other. The rectifying device can eliminate vortexes in the front-rear direction above the air inlet and can eliminate vortexes on the left and right sides inside the air inlet, thereby avoiding the formation of a triangular turbulent flow area, reducing air volume loss and optimizing air inlet noise.

Description

Technical Field

[0001] This invention relates to the field of electrical technology, and more particularly to a rectifier for a range hood and a range hood. Background Technology

[0002] In related technologies, for range hoods with the smoke inlet positioned downwards, there is a vortex at the front of the air intake chamber. Furthermore, two air intake screens are installed at the lower end of the air intake chamber. The flow velocity inside the air intake chamber above the air intake screens is faster than the flow velocity on the sides. As a result, vortices flowing upwards towards the air intake screens will exist on the left and right sides and in the middle of the air intake chamber. In addition, since there are three vortices in the left and right directions on the left and right sides and in the middle of the air intake chamber, when these three vortices in the left and right directions meet the vortices in the front and back directions, they will form two triangular turbulent areas at the front of the air intake chamber.

[0003] Currently, for range hoods with bottom-mounted smoke inlets, the rectification design mainly involves rectification and noise reduction on the left and right sides. However, there is little attention paid to the rectification and noise reduction design of the front and rear sections at the bottom of the range hood, and no relevant solutions have been developed. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a rectifier for a range hood, which can eliminate the vortex in the front-to-back direction located above the air inlet, and prevent the airflow on both sides from meeting the airflow in the middle to form a vortex, thereby eliminating the vortex on the left and right sides inside the air inlet, thus avoiding the formation of a triangular turbulence area, reducing air volume loss, and optimizing intake noise.

[0005] The present invention also proposes a range hood.

[0006] According to a first aspect of the present invention, a rectifier for a range hood is adapted to be installed in the vertical smoke chamber of the range hood and disposed downstream of the air inlet of the range hood in its air inlet direction.

[0007] The rectifying device has a first rectifying surface, a first vortex separation surface and a second vortex separation surface. The first rectifying surface is adapted to be arranged opposite to the air inlet and is inclined towards the vertical smoke chamber along the air inlet direction.

[0008] The first vortex separation surface and the second vortex separation surface are respectively located on both sides of the first rectification surface, and the first vortex separation surface and the second vortex separation surface are respectively adapted to extend obliquely into the vertical smoke cavity along a direction that approaches each other.

[0009] According to the rectifier device of the present invention, when the rectifier device is applied to a range hood, the first rectifier surface can eliminate the vortex in the front-to-back direction located above the air inlet. Furthermore, the first vortex separation surface and the second vortex separation surface located on both sides of the first rectifier surface can separate and block the airflow on the left and right sides inside the air inlet, preventing the airflow on both sides from meeting the airflow in the middle to form a vortex, thereby eliminating the vortex on the left and right sides inside the air inlet. This can further prevent the formation of a triangular turbulence area, reduce airflow loss, and optimize intake noise.

[0010] According to one embodiment of the present invention, the rectifying device is pyramidal in shape and is adapted to protrude toward the vertical smoke chamber. The side of the rectifying device relative to the air inlet forms the first rectifying surface, and the other two sides of the rectifying device respectively form the first vortex separation surface and the second vortex separation surface.

[0011] According to one embodiment of the present invention, the central axis of the rectifier is adapted to be located in the same vertical plane as the vertical axis of the air inlet.

[0012] According to one embodiment of the present invention, the rectifying device further comprises a second rectifying surface and a third rectifying surface, wherein the first rectifying surface, the second rectifying surface and the third rectifying surface are sequentially connected along the air intake direction to form a main flow rectifying surface, and the first vortex separation surface and the second vortex separation surface are respectively located on the left and right sides of the main flow rectifying surface.

[0013] According to one embodiment of the present invention, the second rectifying surface is an arc transition surface, and the second rectifying surface is adapted to bulge toward the vertical smoke cavity.

[0014] According to one embodiment of the present invention, the third rectifying surface is adapted to extend obliquely along the air inlet direction toward the direction close to the air inlet.

[0015] According to one embodiment of the present invention, the rectifier is provided with a plurality of noise reduction holes, which are uniformly distributed along its surface.

[0016] According to one embodiment of the present invention, the sound-absorbing hole is filled with sound-absorbing material.

[0017] A range hood according to a second aspect of the present invention includes:

[0018] The main body of the smoke hood includes a vertical smoke collection hood, a horizontal smoke collection hood, and a fan disposed above the horizontal smoke collection hood. The vertical smoke collection hood forms a vertical smoke chamber and at least one air inlet, and the air inlet communicates with the vertical smoke chamber.

[0019] At least one rectifier for a range hood as described in the first aspect of the invention is disposed within the vertical smoke chamber, the rectifier being fixed to the inner wall of the side of the vertical smoke hood where the air inlet is located.

[0020] The range hood according to the second aspect of the present invention has similar effects to the rectifier device for a range hood according to the first aspect of the present invention, and will not be described again here.

[0021] According to one embodiment of the present invention, on any horizontal plane parallel to the air inlet, the width of the projection of the air inlet is always greater than or equal to the width of the projection of the rectifier.

[0022] According to one embodiment of the present invention, on any vertical cross section perpendicular to the air inlet, the width of the vertical smoke chamber is L1, and the maximum width of the rectifier is L2, wherein L2 = (0.1~0.5)*L1.

[0023] According to one embodiment of the present invention, the air inlet includes a first air inlet and a second air inlet. Correspondingly, the rectifier includes a first rectifier and a second rectifier. The first air inlet and the second air inlet are arranged at the same height along the surface of the vertical smoke hood, and both the first air inlet and the second air inlet are arranged vertically.

[0024] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is one of the structural schematic diagrams of a range hood in related technologies;

[0027] Figure 2 This is the second structural schematic diagram of a range hood in related technologies;

[0028] Figure 3 This is one of the structural schematic diagrams of a range hood provided in one embodiment of the present invention;

[0029] Figure 4 It is along Figure 3 Sectional view of line AA in the middle;

[0030] Figure 5 This is a second schematic diagram of the structure of a range hood provided in one embodiment of the present invention;

[0031] Figure 6 This is the third structural schematic diagram of a range hood provided in one embodiment of the present invention;

[0032] Figure 7 This is a perspective view of a rectifier device provided in one embodiment of the present invention;

[0033] Figure 8 This is one of the structural schematic diagrams of a range hood provided in another embodiment of the present invention;

[0034] Figure 9 It is along Figure 8 Sectional view of the middle BB line;

[0035] Figure 10 This is a second schematic diagram of the structure of a range hood provided in another embodiment of the present invention;

[0036] Figure 11 This is the third structural schematic diagram of a range hood provided in another embodiment of the present invention;

[0037] Figure 12 This is a three-dimensional schematic diagram of a rectifier device provided in another embodiment of the present invention.

[0038] Figure label:

[0039] 001. Fan assembly; 002. Frame assembly; 003. Air inlet chamber; 004. Air inlet grille; 005. Check valve;

[0040] 100. First rectifier; 200. Second rectifier; 11. First rectifier surface; 12. Second rectifier surface; 13. Third rectifier surface; 21. First vortex separation surface; 22. Second vortex separation surface; 3. Air inlet; 31. First air inlet; 32. Second air inlet; 4. Vertical smoke hood; 41. Vertical smoke chamber; 5. Horizontal smoke hood; 6. Fan. Detailed Implementation

[0041] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0042] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0043] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0044] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0046] A rectifier device (hereinafter referred to as the rectifier device) for a range hood according to a first aspect of the present invention is described below with reference to the accompanying drawings.

[0047] like Figures 3 to 12 As shown, according to an embodiment of the present invention, the rectifier is adapted to be installed in the vertical smoke chamber 41 of the range hood, and the rectifier is adapted to be located downstream of the air inlet 3 of the range hood in its air intake direction.

[0048] The rectifier has a first rectifier surface 11, a first eddy current separation surface 21, and a second eddy current separation surface 22.

[0049] The first rectifying surface 11 is adapted to be disposed opposite to the air inlet 3, and the first rectifying surface 11 is adapted to be inclined toward the vertical smoke chamber 41 along the air inlet direction.

[0050] The first vortex separation surface 21 and the second vortex separation surface 22 are located on both sides of the first rectifying surface 11, and the first vortex separation surface 21 and the second vortex separation surface 22 are adapted to extend obliquely into the vertical smoke chamber 41 along a direction that approaches each other.

[0051] According to the rectifier of the present invention, when the rectifier is applied to a range hood, the first rectifier surface 11 can eliminate the vortex in the front-to-back direction above the air inlet 3. Furthermore, the first vortex separation surface 21 and the second vortex separation surface 22 located on both sides of the first rectifier surface 11 can separate and block the airflow on the left and right sides inside the air inlet 3, preventing the airflow on both sides from meeting the airflow in the middle to form a vortex. This eliminates the vortex on the left and right sides inside the air inlet 3, thereby avoiding the formation of a triangular turbulence area, reducing airflow loss, and optimizing intake noise.

[0052] Furthermore, as the horizontal distance between the first rectifying surface 11 and the rear wall of the vertical smoke chamber 41 continuously decreases along the airflow direction, the flow area of ​​the airflow will gradually decrease when passing the third rectifying surface 13. Therefore, the first rectifying surface 11 can accelerate the airflow to increase the airflow velocity, thereby expanding the negative pressure range near the air inlet 3 area, and thus increasing the flow rate of the airflow entering the air inlet 3, thereby improving the smoke extraction effect of the range hood.

[0053] According to an embodiment of the present invention, the phrase "the first rectifying surface 11 is adapted to be disposed opposite to the air inlet 3" means that at least a portion of the airflow entering from the air inlet 3 will flow through the first rectifying surface 11. For example, the first rectifying surface 11 is located directly above the air inlet 3, and at least the airflow entering from the middle region of the air inlet 3 will pass through the first rectifying surface 11.

[0054] It is understood that the air inlet 3 of the range hood is usually located at the lower end of the range hood. The air intake direction of the range hood refers to the direction in which the airflow enters the vertical smoke chamber 41 from the air inlet 3 and enters the fan 6 of the range hood. For example, assuming that the air inlet 3 is located at the bottom of the front wall of the vertical smoke chamber 41 of the range hood, the above-mentioned "the first rectifier surface 11 is adapted to be inclined towards the vertical smoke chamber 41 along the air intake direction" means that the first rectifier surface 11 extends inclined from bottom to top towards the rear wall of the vertical smoke chamber 41.

[0055] The phrase "along the direction of mutual approach" refers to the direction toward the central axis of the rectifier. Therefore, the phrase "the first vortex separation surface 21 and the second vortex separation surface 22 are respectively adapted to extend obliquely toward the vertical smoke chamber 41 along the direction of mutual approach" means that the first vortex surface extends obliquely toward the rear wall of the vertical smoke chamber 41 in the direction of the central axis of the rectifier, and the second vortex surface extends obliquely toward the rear wall of the vertical smoke chamber 41 in the direction of the central axis of the rectifier.

[0056] like Figure 1 and Figure 2 As shown, the specific formation process of the vortex involved in the above effect is explained below based on the specific structure in the relevant technology and the basic knowledge in this field: According to the conventional knowledge mastered by those skilled in the art, in order to improve the absorption of oil fumes, the air inlet of the range hood in the relevant technology is generally set at a certain angle relative to the horizontal direction. The above structural form will lead to the following result: After the airflow enters the vertical smoke chamber from the air inlet, due to the inclination of the air inlet relative to the horizontal plane, the airflow will usually change its flow direction, and the change in the flow direction will cause the airflow to form a vortex above the inner side of the air inlet.

[0057] Furthermore, based on conventional knowledge possessed by those skilled in the art, it can be understood that, since the airflow velocity at the end near the inlet is less than that at the middle position of the air inlet, under different air pressure environments, the airflow at the end near the air inlet will deflect towards the middle position of the air inlet, thereby causing the airflow to form vortices in the left and right sides of the air inlet cavity respectively.

[0058] Let's take a range hood from the relevant technology as an example for illustration, such as... Figure 1 and Figure 2 As shown, the air inlet mesh 004 is vertically arranged and directly connected to the vertical air inlet chamber of the range hood. Figure 1 As shown, when the airflow enters the air intake chamber 003 from the air intake mesh 004, the airflow direction changes from horizontal to vertical, resulting in a clockwise vortex forming above the inner side of the air intake mesh 004. Figure 2As shown, because the airflow velocity through the middle of the air inlet mesh 004 is greater than the airflow velocity through the left and right sides of the air inlet mesh 004, the airflow on the left and right sides deflects towards the middle, thus causing the airflow to form vortices on the left and right sides of the air inlet cavity 003, and the direction of the vortices is as follows. Figure 2 As shown.

[0059] In conclusion, Figure 1 and Figure 2 The range hood in the related technology shown has three vortices in the left and right directions on the left and right sides and in the middle of the air intake cavity 003. After the three vortices meet the vortex in the front and back direction located above the air intake net 004, they together form two triangular turbulent areas on the front side of the air intake cavity 003.

[0060] The following comparison between the rectifier structure in related technologies and the rectifier device of the present invention will highlight the beneficial effects of the rectifier device of the present invention:

[0061] Range hoods in related technologies typically lack a rectification structure to address the aforementioned multi-stream vortices. Even those range hoods with rectification structures only address the elimination of vortices on the left and right sides of the air intake chamber (e.g., Figure 2 The vortex shown may only have a silencing effect but not eliminate the vortex. In other words, the rectification structure in related technologies usually only involves rectification and silencing on the left and right sides of the intake chamber, and does not address the vortex located above the air intake mesh in the front-to-back direction (e.g., the vortex). Figure 1 Even if the eddies shown are eliminated, the formation of turbulence in the triangular region mentioned above cannot be avoided.

[0062] In summary, the rectification structure in the relevant technologies cannot eliminate the vortices in the front-to-back direction above the air inlet screen, and does not form a comprehensive solution for all vortices near the air inlet. Therefore, it cannot completely eliminate the vortices near the air inlet, which will still lead to the formation of triangular turbulence, and it cannot solve the noise problem caused by other vortices.

[0063] To solve the above-mentioned technical problems, according to the rectifier of the present invention, when it is installed in the air intake cavity of the range hood, on the one hand, since the first rectifier surface 11 is inclined towards the vertical smoke cavity 41, for the vortex located above the air inlet 3 in the front-to-back direction, the first rectifier surface 11 is located on the flow path of the vortex, so the first rectifier surface 11 can eliminate the vortex located above the air inlet 3 in the front-to-back direction; on the other hand, the first vortex separation surface 21 and the second vortex separation surface 22 located on both sides of the first rectifier surface 11 can also separate and block the airflow on the left and right sides inside the air inlet 3, preventing the airflow on both sides from meeting the airflow in the middle to form a vortex, thereby eliminating the vortex located on the left and right sides inside the air inlet 3.

[0064] In summary, the rectifier of the present invention can not only eliminate the vortices located on the left and right sides of the air intake cavity, but also eliminate the vortices located above the air inlet 3 along the front and rear directions, thereby greatly reducing the loss of air volume and optimizing the intake noise. Furthermore, since all the vortices near the air inlet 3 are eliminated by the rectifier, the formation of the triangular turbulence area can be avoided, further optimizing the smoke extraction effect and noise reduction effect.

[0065] The purpose of the above description is to highlight the difference between the rectifier of the present invention and rectifiers in related technologies. The rectifier of the present invention will be described in detail below through various specific embodiments.

[0066] According to one embodiment of the present invention, the rectifier is pyramidal in shape and is adapted to protrude into the vertical smoke chamber 41. The side of the rectifier relative to the air inlet 3 forms a first rectifier surface 11, and the other two sides of the rectifier form a first vortex separation surface 21 and a second vortex separation surface 22, respectively.

[0067] like Figures 3 to 7 As shown, in this embodiment, the rectifier is pyramid-shaped, with the apex of the rectifier protruding into the vertical smoke chamber 41, that is, the apex of the rectifier protruding towards the rear wall of the vertical smoke chamber 41. In this way, the side of the rectifier relative to the air inlet 3 (i.e., the first rectifier surface 11) can guide the airflow in the middle region. The airflow entering from the two sides of the air inlet 3 is blocked by the first vortex separation surface 21 and the second vortex separation surface 22, so that the airflow in the two sides cannot meet the airflow in the middle region, that is, the airflow in the two sides is separated from the airflow in the middle region, thereby avoiding the generation of vortices.

[0068] like Figure 3 As shown, according to one embodiment of the present invention, the central axis of the rectifier is adapted to be located in the same vertical plane as the vertical axis of the air inlet 3. This allows the rectifier to be positioned directly above the air inlet 3, resulting in better rectification and eddy current elimination effects.

[0069] like Figures 3 to 7 As shown, in a specific embodiment of the present invention, the rectifier is pyramidal in shape. The first rectifier plate, the first vortex separator plate, and the second vortex separator plate are all triangular plates and exist as the three side plates of the rectifier. The outer wall surface of the first rectifier plate forms the first rectifier surface 11, the outer wall surface of the first vortex separator plate forms the first vortex separator surface 21, and the outer wall surface of the second vortex separator plate forms the second vortex separator surface 22.

[0070] The bottom ends of the first vortex separation plate, the second vortex separation plate, and the first rectifier plate all extend outward to form fixed ends. The fixed ends of the three plates are respectively fixed to the front wall of the vertical smoke chamber 41 by bolts.

[0071] like Figures 8 to 12 As shown, according to an embodiment of the present invention, the rectifier further comprises a second rectifier surface 12 and a third rectifier surface 13. The first rectifier surface 11, the second rectifier surface 12 and the third rectifier surface 13 are connected sequentially along the air intake direction to form a main flow rectifier surface. The first vortex separation surface 21 and the second vortex separation surface 22 are located on the left and right sides of the main flow rectifier surface, respectively.

[0072] In this way, by adding the second rectifying surface 12 and the third rectifying surface 13, the rectifying surface area of ​​the main flow channel is increased, so that the flue gas is better rectified during the rising process. In addition, the distance between the first vortex separation surface 21 and the second vortex separation surface 22 is increased, thereby further strengthening the separation of the vortices on the left and right sides and avoiding the airflow on the left and right sides from affecting the airflow in the middle area.

[0073] like Figure 12 As shown, in one embodiment of the present invention, the first rectifying surface 11, the second rectifying surface 12, and the third rectifying surface 13 are connected sequentially from bottom to top and together constitute the main flow channel rectifying surface. The first vortex separating surface 21 is connected to one side of each of the three rectifying surfaces (i.e., the first rectifying surface 11, the second rectifying surface 12, and the third rectifying surface 13), and the second vortex separating surface 22 is connected to the other side of each of the three rectifying surfaces. The main flow channel rectifying surface can rectify the airflow in the middle region, while the first vortex separating surface 21 and the second vortex separating surface 22 can guide and block the airflow on the left and right sides, respectively.

[0074] like Figure 12 As shown, according to one embodiment of the present invention, the second rectifying surface 12 is an arc transition surface, and the second rectifying surface 12 is adapted to protrude toward the vertical smoke chamber 41.

[0075] In this way, by setting the second rectifying surface 12, which serves as a transition surface, as an arc surface, the airflow can be guided more gently during the rectification process, avoiding abrupt changes in airflow direction when passing through the second rectifying surface 12, and reducing airflow loss during the rectification process.

[0076] like Figure 10 As shown, according to one embodiment of the present invention, the third rectifying surface 13 is adapted to extend obliquely along the air inlet direction toward the direction close to the air inlet 3.

[0077] Thus, as the horizontal distance between the third rectifying surface 13 and the rear wall of the vertical smoke chamber 41 continuously increases along the airflow direction, the flow area of ​​the airflow passing through the third rectifying surface 13 will gradually increase. As a result, the third rectifying surface 13 can slow down the airflow, which is beneficial for noise control of the range hood and avoids excessive noise caused by excessive airflow velocity. In addition, when the range hood is equipped with multiple air inlets 3 and corresponding multiple rectifying devices, reducing the airflow velocity by the third rectifying surface 13 can also avoid large collision losses when airflows entering from different air inlets 3 meet, ensuring the airflow effect in the vertical smoke chamber 41 of the range hood, and also reducing noise.

[0078] like Figures 8 to 12 As shown, in a specific embodiment of the present invention, the air inlet 3 is vertically disposed on the front wall of the vertical smoke chamber 41. The first rectifier plate (not shown in the figure), the second rectifier plate (not shown in the figure), and the third rectifier plate (not shown in the figure) are connected in sequence from bottom to top. The first rectifier plate extends upward and obliquely toward the rear wall of the vertical smoke chamber 41. The second rectifier plate is an arc-shaped plate and protrudes toward the rear wall of the vertical smoke chamber 41. The third rectifier plate extends upward and obliquely toward the front wall of the vertical smoke chamber 41.

[0079] The first vortex separation plate (not shown in the figure) is connected to one side of the first rectifier plate, the second rectifier plate and the third rectifier plate, and the second vortex separation plate (not shown in the figure) is connected to the other side of the first rectifier plate, the second rectifier plate and the third rectifier plate. The first vortex separation plate and the second vortex separation plate extend obliquely toward the central axis of the rectifier device and toward the rear wall of the vertical smoke chamber 41.

[0080] The outer wall surface of the first rectifier plate forms a first rectifier surface 11, the outer wall surface of the second rectifier plate forms a second rectifier surface 12, the outer wall surface of the third rectifier plate forms a third rectifier surface 13, the outer wall surface of the first vortex separator plate forms a first vortex separation surface 21, and the outer wall surface of the second vortex separator plate forms a second vortex separation surface 22. The outer edge of the rectifier device is fixed to the front wall of the vertical smoke chamber 41 by bolts.

[0081] According to one embodiment of the present invention, the rectifier is provided with a plurality of silencing holes (not shown in the figure), which are evenly distributed along its surface. In this way, the silencing holes can reduce noise, thereby lowering the overall noise level of the range hood.

[0082] According to one embodiment of the present invention, the sound-absorbing holes are filled with a sound-absorbing material (not shown in the figure). This can further reduce the operating noise of the range hood. For example, the sound-absorbing material can be a sponge, cloth, or other similar materials.

[0083] The following description, with reference to the accompanying drawings, describes a range hood according to a second aspect of the present invention, including a rectifier as described in the first aspect of the present invention, and also including a range hood body.

[0084] like Figures 3 to 12 As shown, the main body of the smoke machine includes a vertical smoke collection hood 4, a horizontal smoke collection hood 5, and a fan 6 disposed above the horizontal smoke collection hood 5. The vertical smoke collection hood 4 forms a vertical smoke chamber 41 and at least one air inlet 3, and the air inlet 3 is connected to the vertical smoke chamber 41.

[0085] The range hood has at least one rectifier, which is located in the vertical smoke chamber 41 and connected to the air inlet 3. The rectifier is fixed to the inner wall of the vertical smoke hood 4 on the side with the air inlet 3.

[0086] The range hood according to the embodiments of the present invention has similar effects to the rectifier device for a range hood according to the first aspect of the present invention, and will not be described again here.

[0087] According to one embodiment of the present invention, on any horizontal plane parallel to the air inlet 3, the width of the projection of the air inlet 3 is always greater than or equal to the width of the projection of the rectifier. This avoids the rectifier from becoming too large and obstructing the airflow entering from both sides of the air inlet 3, thus not only eliminating eddies but also ensuring smooth airflow.

[0088] like Figure 3 As shown, in one embodiment of the present invention, the rectifier is pyramidal in shape, and the maximum width of the first rectifier surface 11 is less than or equal to the width of the air inlet 3.

[0089] like Figure 8 As shown, in another embodiment of the present invention, the rectifier further comprises a second rectifier surface 12 and a third rectifier surface 13, wherein the first rectifier surface 11, the second rectifier surface 12 and the third rectifier surface 13 together form the main channel rectifier surface, wherein the maximum width of the main channel rectifier surface is less than or equal to the width of the air inlet 3.

[0090] like Figure 11 As shown, according to an embodiment of the present invention, on any vertical section perpendicular to the air inlet 3, the width of the vertical smoke chamber 41 is L1, and the maximum width of the rectifier is L2, wherein L2 = (0.1~0.5)*L1.

[0091] This ensures that the tilt angle of the first rectifier surface 11 is more suitable for the overall size of the range hood, resulting in better rectification effect of the rectifier device.

[0092] like Figure 11As shown, according to one embodiment of the present invention, on any vertical section perpendicular to the air inlet 3, the width of the vertical smoke chamber 41 is L1, and the distance between the surface of the volute on the front side of the main air inlet 3 and the back plate of the fan 6 is L3, where L1 = (0.5~1.5)*L3. This avoids abrupt changes in airflow direction during the process of airflow exiting the vertical smoke chamber 41 and entering the fan 6, thus reducing airflow loss.

[0093] like Figure 3 and Figure 8 As shown, according to an embodiment of the present invention, the air inlet 3 includes a first air inlet 31 and a second air inlet 32. Correspondingly, the rectifier includes a first rectifier 100 and a second rectifier 200. The first air inlet 31 and the second air inlet 32 ​​are arranged at the same height along the surface of the vertical smoke hood 4, and both the first air inlet 31 and the second air inlet 32 ​​are arranged vertically.

[0094] By installing two air inlets 3 on the range hood and equipping each inlet 3 with a corresponding rectifier, the range hood can achieve better smoke extraction and lower noise. Furthermore, the vertically positioned air inlets 3 provide even better air intake.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

[0096] The above embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Although the invention has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of the invention do not depart from the spirit and scope of the invention and should be covered within the scope of the claims of the invention.

Claims

1. A rectifier for a range hood, characterized in that, The rectifier is suitable for installation in the vertical smoke chamber of the range hood, and is located downstream of the air inlet of the range hood in its air intake direction; The rectifying device has a first rectifying surface, a first vortex separation surface and a second vortex separation surface. The first rectifying surface is adapted to be arranged opposite to the air inlet and is inclined towards the vertical smoke chamber along the air inlet direction. The first vortex separation surface and the second vortex separation surface are respectively located on both sides of the first rectifying surface, and the first vortex separation surface and the second vortex separation surface extend obliquely toward the vertical smoke chamber along a direction that approaches each other; The rectifying device is adapted to protrude toward the vertical smoke chamber, and the side of the rectifying device relative to the air inlet forms the first rectifying surface, and the other two sides of the rectifying device form the first vortex separation surface and the second vortex separation surface, respectively.

2. The rectifier for a range hood according to claim 1, characterized in that, The rectifier is pyramid-shaped.

3. The rectifier for a range hood according to claim 2, characterized in that, The central axis of the rectifier is adapted to be located in the same vertical plane as the vertical axis of the air inlet.

4. The rectifier for a range hood according to claim 1, characterized in that, The rectifier also has a second rectifier surface and a third rectifier surface. The first rectifier surface, the second rectifier surface and the third rectifier surface are connected in sequence along the air intake direction to form a main flow rectifier surface. The first vortex separation surface and the second vortex separation surface are located on the left and right sides of the main flow rectifier surface, respectively.

5. The rectifier for a range hood according to claim 4, characterized in that, The second rectifying surface is a rounded transition surface, and the second rectifying surface is adapted to protrude toward the vertical smoke cavity.

6. The rectifier for a range hood according to claim 4, characterized in that, The third rectifying surface is adapted to extend at an angle toward the air inlet along the air intake direction.

7. The rectifier for a range hood according to any one of claims 1 to 6, characterized in that, The rectifier is provided with a plurality of noise reduction holes, which are evenly distributed along its surface.

8. The rectifier for a range hood according to claim 7, characterized in that, The sound-absorbing holes are filled with sound-absorbing material.

9. A range hood, characterized in that, include: The main body of the smoke hood includes a vertical smoke collection hood, a horizontal smoke collection hood, and a fan disposed above the horizontal smoke collection hood. The vertical smoke collection hood forms a vertical smoke chamber and at least one air inlet, and the air inlet communicates with the vertical smoke chamber. At least one rectifier for a range hood as described in any one of claims 1 to 8 is disposed within the vertical smoke chamber, and the rectifier is fixed to the inner wall of the side of the vertical smoke hood where the air inlet is located.

10. The range hood according to claim 9, characterized in that, On any horizontal plane parallel to the air inlet, the width of the projection of the air inlet is always greater than or equal to the width of the projection of the rectifier.

11. The range hood according to claim 9, characterized in that, On any vertical section perpendicular to the air inlet, the width of the vertical smoke chamber is L1, and the maximum width of the rectifier is L2, where L2 = (0.1~0.5) * L1.

12. The range hood according to any one of claims 9 to 11, characterized in that, The air inlet includes a first air inlet and a second air inlet. Correspondingly, the rectifier includes a first rectifier and a second rectifier. The first air inlet and the second air inlet are spaced apart at the same height along the surface of the vertical smoke hood, and both the first air inlet and the second air inlet are vertically arranged.

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