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CN-122015154-A - Fume exhauster

CN122015154ACN 122015154 ACN122015154 ACN 122015154ACN-122015154-A

Abstract

The invention belongs to the technical field of household appliances, and particularly relates to a range hood. The range hood comprises a smoke collecting cavity, a fan, a cover plate and a flow guiding structure, wherein a smoke inlet is formed in the front side of the smoke collecting cavity, the fan is arranged in the smoke collecting cavity, the cover plate is movably arranged on the front side of the smoke collecting cavity, the cover plate can slide relative to the smoke collecting cavity along the front-back direction so as to switch between a first position attached to the front side surface of the smoke collecting cavity and a second position arranged at intervals with the front side surface of the smoke collecting cavity, and the flow guiding structure is arranged at the smoke inlet so as to divide the smoke inlet into a plurality of flow dividing channels for uniform airflow. The flow guiding structure can guide airflow to enter the smoke collecting cavity through the plurality of flow dividing channels, so that airflow and flow velocity at the smoke inlet are uniformly distributed, fluid disturbance and velocity gradient are weakened, accordingly airflow separation and turbulence development are restrained, airflow resistance is reduced, directional high-speed conveying of oil smoke is realized, air quantity loss at the smoke inlet is reduced, and performance of the range hood is improved.

Inventors

  • QI ZHONGXIANG
  • BAO MING
  • ZHANG SU
  • REN FUJIA
  • Ming Lining

Assignees

  • 杭州老板电器股份有限公司

Dates

Publication Date
20260512
Application Date
20260318

Claims (12)

  1. 1. A range hood, comprising: The cigarette collecting device comprises a cigarette collecting cavity (10), wherein a cigarette inlet (11) is formed in the front side of the cigarette collecting cavity (10); The fan (20) is arranged in the smoke collecting cavity (10); The cover plate (30) is movably arranged on the front side of the smoke collecting cavity (10), and the cover plate (30) can slide relative to the smoke collecting cavity (10) along the front-back direction so as to switch between a first position attached to the front side surface of the smoke collecting cavity (10) and a second position arranged at intervals with the front side surface of the smoke collecting cavity (10); the flow guiding structure (40) is arranged at the smoke inlet (11) to divide the smoke inlet (11) into a plurality of flow dividing channels so as to uniformly flow.
  2. 2. The range hood according to claim 1, wherein the flow guiding structure (40) comprises a plurality of flow guiding plates (41), and the plurality of flow guiding plates (41) are arranged in the smoke inlet (11) in a crossing manner so as to divide the smoke inlet (11) into a plurality of flow dividing channels.
  3. 3. The range hood according to claim 2, wherein the middle parts of the plurality of guide plates (41) are intersected and radial, the centers of the guide plates (41) are coincident with the centers of the smoke inlets (11), and the included angles between any two adjacent guide plates (41) are equal.
  4. 4. A range hood according to claim 3, wherein the inlet (11) is circular and the baffle (41) extends radially of the inlet (11); and/or the flow guiding structure (40) further comprises an annular support (42), the annular support (42) being cross-connected with each flow guiding plate (41).
  5. 5. The range hood according to any one of claims 1 to 4, wherein an arc structure is provided at the smoke inlet (11), the arc structure comprises an arc guiding surface (221) protruding toward the inside of the smoke inlet (11), and the guiding structure (40) is connected with the arc guiding surface (221).
  6. 6. A range hood according to claim 5, wherein the radius of curvature of the circular arc guiding surface (221) is 15mm-25mm.
  7. 7. The range hood according to claim 5, wherein the fan (20) comprises a housing (22), an air inlet communicated with the smoke inlet (11) is formed in the housing (22), the edge of the housing (22) surrounding the air inlet is bent and extended towards the inner side of the smoke inlet (11) to form the arc structure, and the arc guide surface (221) is abutted with the edge of the smoke collecting cavity (10) surrounding the smoke inlet (11).
  8. 8. The range hood according to claim 5, wherein the fan (20) comprises an impeller (21), an annular flange (211) is arranged at one axial end of the impeller (21) along the circumferential direction of the smoke inlet (11), and the circular arc guide surface (221) extends into the annular flange (211) and is arranged at a distance from the annular flange (211) to form a sealing gap (12).
  9. 9. A range hood according to claim 8, wherein the sealing gap (12) is 0.5mm-2mm.
  10. 10. The range hood according to any one of claims 1-4, wherein a side of the cover plate (30) facing the smoke inlet (11) is concavely formed with a groove (31), and a boss (32) is formed on a side of the cover plate (30) facing away from the smoke inlet (11), and a projection of the groove (31) onto the smoke collecting chamber (10) in the front-rear direction covers at least part of the smoke inlet (11).
  11. 11. A range hood according to claim 10, wherein the side walls of the recess (31) extend gradually from front to back towards the edge of the cover plate (30); And/or the depth of the groove (31) is 10mm-20mm; and/or the radial dimension of the groove (31) is 1.5-2 times of the radial dimension of the smoke inlet (11); And/or the boss (32) comprises at least two circular table sections which are sequentially connected, the diameters of two adjacent circular table sections are sequentially increased from front to back, and the diameter of one end of the boss (32) axially close to the smoke inlet (11) is 2-3 times of the diameter of the other end of the boss axially close to the smoke inlet.
  12. 12. The range hood according to any one of claims 1 to 4, wherein a first sliding guide (51) is provided on the cover plate (30), a second sliding guide (52) is provided in the smoke collecting chamber (10), and the first sliding guide (51) and the second sliding guide (52) are slidingly engaged in the front-rear direction.

Description

Fume exhauster Technical Field The invention relates to the technical field of household appliances, in particular to a range hood. Background In the fume treatment equipment such as a range hood, a fume collecting cavity is a core component for fume collection and flow guide, and the inlet structure of the fume collecting cavity directly determines the fume capturing efficiency and the running performance of a fan of the equipment. The straight plate type smoke collecting cavity is widely applied to miniaturized equipment due to the characteristics of simple inlet structure and small occupied space. The existing smoke collecting cavity is limited by the installation space and the appearance design, the thickness is often limited in a narrow range of 90mm-150mm, structural defects exist in a traditional horizontal telescopic cover plate due to the limitation, when air flows enter a smoke inlet through a gap of the cover plate and the smoke collecting cavity, the air flows are concentrated at the edge of the smoke inlet, the air flows are unevenly distributed, wind resistance is large, accordingly the maximum effective flow area can only meet 50% -70% of rated requirements, the air inlet capacity of a fan is insufficient, air flow distortion and vortex aggravation are caused, and the inlet loss is remarkably increased. The increase of fan inlet loss directly causes the air quantity attenuation, the wind pressure reduces, simultaneously accompanies the noise to rise, and the energy consumption increases, seriously influences the result of use. Disclosure of Invention The invention aims to provide a range hood, which can solve the problems of uneven air flow distribution, large wind resistance and large air quantity loss at an inlet of a fan of an ultrathin range hood adopting a telescopic cover plate at a smoke inlet. To achieve the purpose, the invention adopts the following technical scheme: a range hood, comprising: the front side of the smoke collecting cavity is provided with a smoke inlet; the fan is arranged in the smoke collecting cavity; The cover plate is movably arranged on the front side of the smoke collecting cavity, and can slide along the front-back direction relative to the smoke collecting cavity so as to switch between a first position attached to the front side surface of the smoke collecting cavity and a second position arranged at intervals with the front side surface of the smoke collecting cavity; The flow guiding structure is arranged at the smoke inlet so as to divide the smoke inlet into a plurality of flow dividing channels for uniform airflow. As an alternative scheme of the above range hood, the flow guiding structure includes a plurality of flow guiding plates, and the plurality of flow guiding plates are disposed in the smoke inlet in a crossing manner so as to divide the smoke inlet into a plurality of flow dividing channels. As an alternative scheme of the range hood, the middle parts of the guide plates are intersected and radial, the centers of the guide plates are coincident with the centers of the smoke inlets, and the included angles between any two adjacent guide plates are equal. As an alternative scheme of the range hood, the smoke inlet is circular, and the guide plate extends along the radial direction of the smoke inlet; and/or the flow guiding structure further comprises an annular supporting piece, and the annular supporting piece is in cross connection with each flow guiding plate. As an alternative scheme of the range hood, the smoke inlet is provided with an arc structure, the arc structure comprises an arc guide surface protruding towards the inside of the smoke inlet, and the guide structure is connected with the arc guide surface. As an alternative scheme of the range hood, the curvature radius of the arc guide surface is 15mm-25mm. As an alternative scheme of above-mentioned range hood, the fan includes the casing, is provided with the air intake with advance the cigarette mouth intercommunication on the casing, and the edge that encloses into the air intake of casing is crooked to extend to advance cigarette mouth inboard and is formed circular arc structure, and circular arc guide surface and collection cigarette chamber enclose into the edge butt of advancing the cigarette mouth. As an alternative scheme of the range hood, the fan further comprises an impeller, an annular flange is arranged at one axial end of the impeller along the circumferential direction of the smoke inlet, and the circular arc guide surface extends into the annular flange and is arranged at intervals with the annular flange to form a sealing gap. As an alternative to the above range hood, the sealing gap is 0.5mm-2mm. As an alternative scheme of the range hood, a concave groove is formed on one side of the cover plate facing the smoke inlet, a boss is formed on one side of the cover plate facing away from the smoke inlet, and at least part of the smoke inlet is covered by projectio