A range hood

Abstract

The present invention discloses a range hood, including a smoke collecting hood, the smoke collecting hood including a hood body, the hood body is recessed upward from the bottom to form a smoke collecting chamber, an air inlet is opened on the hood body, the air inlet is located at the top of the smoke collecting chamber, the top of the hood body is located on the left and right sides of the air inlet and is in a shape of horizontal extension, and the top of the hood body is located on the left and right sides of the air inlet and is respectively provided with a profile, the profile is formed by a part of the hood body recessed downward; a filter is provided in the smoke collecting chamber, and the filter can receive oil dripping from the lower surface of the profile. Compared with the prior art, the advantage of the present invention is that the top wall of the smoke collecting chamber is designed to be recessed downward, so that the oil condensed on the wall can flow downward along the profile and drip downward onto the filter, thereby realizing the oil path under the cramped space of the smoke collecting chamber of the top suction range hood, which can ensure a large ventilation area while preventing the oil dripping from the top of the smoke collecting chamber onto the stove.

Description

Technical Field

[0001] The invention relates to an oil fume purification device, in particular to a range hood. Background Art

[0002] Range hoods have become one of the indispensable kitchen appliances in modern families. Range hoods work based on the principle of fluid dynamics. A centrifugal fan installed inside the range hood absorbs and exhausts oil fumes, and uses a filter to filter out some grease particles. The centrifugal fan includes a volute, an impeller installed in the volute, and a motor that drives the impeller to rotate. When the impeller rotates, negative pressure suction is generated at the center of the fan, sucking the oil fumes under the range hood into the fan. After being accelerated by the fan, the fumes are collected by the volute and guided to be discharged outdoors.

[0003] Range hoods usually include side suction type and top suction type. For side suction range hoods, since the surface of the smoke collecting chamber is very inclined, the oil condensed in the smoke collecting chamber can flow smoothly into the oil cup along the surface of the smoke collecting chamber. For top suction range hoods, such as a top suction range hood disclosed in Chinese patent application No. 201910770207.X, includes a casing, a wind cabinet, a smoke collecting hood, an oil net and an oil cup. The wind cabinet is installed in the casing, an impeller is installed inside the wind cabinet, the smoke collecting hood is installed at the bottom of the casing, the oil net is installed at the air inlet of the smoke collecting hood, and the oil cup is installed at the bottom of the oil net.

[0004] The existing top-suction range hood has a relatively thin overall thickness of the smoke collecting chamber, and therefore cannot form a plane with a large inclination angle for guiding the oil, which poses a safety hazard of oil dripping. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a range hood to prevent oil from dripping in view of the deficiencies in the above-mentioned prior art.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a range hood, including a smoke collecting hood, the smoke collecting hood including a hood body, the hood body is recessed upward from the bottom to form a smoke collecting chamber, the hood body is provided with an air inlet, and the air inlet is located at the top of the smoke collecting chamber, and is characterized in that: the top of the hood body located on the left and right sides of the air inlet is in a laterally extended shape, and the top of the hood body located on the left and right sides of the air inlet are respectively provided with pressed profiles, and the pressed profiles are formed by a part of the hood body being recessed downward; a filter is provided in the smoke collecting chamber, and the filter can receive oil dripping from the lower surface of the pressed profile.

[0007] Preferably, each of the left and right sides of the cover body has at least two pressed profiles, and the pressed profiles are arranged side by side in the left-right direction.

[0008] In order to facilitate the filter to receive the oil dripping from the pressure profile, the filter includes at least two mesh holes, each mesh hole is long and extends in the front-to-back direction, and the mesh holes are arranged at intervals in the left-to-right direction. The part between adjacent mesh holes constitutes an oil guide groove. The pressure profile corresponds to the oil guide groove, and the lowest point of the pressure profile is located above the corresponding oil guide groove.

[0009] In order to ensure that the filter can catch the dripping oil and prevent the oil from overflowing or splashing, the press has a straight transition area at the bottom, the width of the transition area in the left and right direction is D1, the width of the oil guide groove in the left and right direction is D2, and D2>D1 is satisfied.

[0010] In order to prevent oil from spilling out, the mesh holes are flanged holes with the left and right sides flanged upward.

[0011] Preferably, in order to facilitate the oil to flow downward along the pressure profile, the pressure profile is V-shaped, and the angles between the left and right sides of the pressure profile and the horizontal direction are both in the range of 10° to 40°.

[0012] Preferably, in order to ensure the consistency of the appearance of the smoke hood and to facilitate the installation of a control panel, lighting device, etc. on the smoke hood, the hood body includes an inner hood and an outer hood arranged outside the inner hood, the inner hood is recessed upward from the bottom to form the smoke collecting cavity, and the pressed profile is formed on the inner hood.

[0013] In order to receive the oil on the filter screen, an oil cup is arranged at the bottom of the rear side of the smoke collecting hood, and the rear end of the filter screen is located above the oil cup.

[0014] Preferably, in order to facilitate the oil on the filter to flow into the oil cup, the filter is gradually tilted downward from front to back, and the inclination angle of the filter relative to the horizontal direction is α2, and satisfies 12.5°≤α2≤25°.

[0015] Compared with the prior art, the advantages of the present invention are that the top wall of the smoke collecting chamber is designed to be a downwardly concave profile, so that the oil condensed on the wall can flow downward along the profile and drip onto the filter, thereby realizing the oil path in the cramped space of the smoke collecting chamber of the top-suction range hood, which can ensure a larger ventilation area while preventing the oil on the top of the smoke collecting chamber from dripping onto the stove through a single-layer net. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of a range hood according to an embodiment of the present invention;

[0017] Figure 2 It is a cross-sectional view (left-right cross-section) of a hidden fan frame of a range hood according to an embodiment of the present invention;

[0018] Figure 3 for Figure 2 A front view of

[0019] Figure 4 for Figure 3 A schematic diagram of the partial enlargement of Ⅰ;

[0020] Figure 5 A schematic diagram of a portion of a smoke collecting hood of a range hood according to an embodiment of the present invention;

[0021] Figure 6 It is a cross-sectional view (front-to-back cross-section) of a hidden fan frame of a range hood according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present invention can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0024] See also Figure 1 to Figure 5 A range hood is a top-suction range hood, comprising a fume hood 1 and a fan frame 2 arranged above the fume hood 1, wherein a fan system (not shown) is arranged in the fan frame 2.

[0025] The smoke hood 1 includes an inner hood 11 and an outer hood 12 arranged outside the inner hood 11. The inner hood 11 and the outer hood 12 constitute a hood body. The inner hood 11 is recessed upward from the bottom to form a smoke collecting chamber 13. An air inlet 14 is provided on the hood body. The air inlet 14 is located at the top of the smoke collecting chamber 13, that is, the connection position of the smoke hood 1 and the fan frame 2. The air inlet 14 allows the internal fluid of the smoke collecting chamber 13 and the fan frame 2 to be connected, so that the oil smoke can enter the fan frame 2 from the smoke collecting chamber 13 through the air inlet 14 and be discharged by the fan system in the fan frame 2. The top of the outer hood 12 is preferably horizontal, and the top of the inner hood 11 is horizontal as a whole. The hood body may also include only the inner hood 11.

[0026] The top of the inner cover 11 (the top of the smoke collecting chamber 13) is located on the left and right sides of the air inlet 14 and is in a shape of horizontal extension as a whole. Here, horizontal extension refers to a state that is not tilted relative to the horizontal direction, or is close to the horizontal state. Due to the limitation of the overall thickness of the smoke collecting hood 1, the inner cover 11 cannot be made into an inclined shape to guide the oil. For this reason, the top of the inner cover 11 is located on the left and right sides of the air inlet 14 and is respectively provided with a profile 15. The profile 15 is formed by a part of the inner cover 11 being recessed downward, so that the oil condensed in the inner cover 11 can be gathered on the bottom curve of the profile 15. There can be one profile 15 on each side, preferably at least two, and they are arranged side by side in the left and right directions to form a regular array structure. In this embodiment, the longitudinal section of the profile 15 is roughly V-shaped, and each profile 15 is serrated as a whole. The angles between the left and right sides and the horizontal direction are both α1, and preferably, the value range of α1 is 10°≤α1≤40°. The α1 on the left and right sides can be equal or unequal. The embossed profile 15 has a straight and gentle transition region 151 at the bottom.

[0027] Alternatively, each profile 15 may also form a wave shape, a sinusoidal wave shape, etc. as a whole.

[0028] In order to further expand the air intake area, a filter screen 3 is provided in the smoke collecting chamber 13, and the filter screen 3 extends left and right to nearly fill the smoke collecting chamber 13. The filter screen 3 is preferably a grille screen, and the filter screen 3 includes at least two mesh holes 31, each mesh hole 31 is in a long strip shape and extends in the front-to-back direction, and each mesh hole 31 is arranged at intervals in the left-to-right direction, and the mesh holes 31 are flanged holes (the left and right sides are flanged upward), so that the portion between adjacent mesh holes 31 constitutes an oil guide groove 32. Figure 6 , the filter 3 gradually tilts downward from front to back. The inclination angle of the filter 3 relative to the horizontal direction is α2, and the preferred interval is 12.5°≤α2≤25°. An oil cup 4 is provided at the bottom of the rear side of the smoke hood 1, and the rear end of the filter 3 is located above the oil cup 4, so that the filter 3 can guide its own oil into the oil cup 4.

[0029] See also Figure 2 to Figure 4 Each profile 15 corresponds to an oil guide groove 32, and the lowest point of the profile 15 is located above the corresponding oil guide groove 32, so that the oil on the lower surface of the top of the smoke collecting chamber 13 can just be directed to the filter 3. The width of the transition area 151 of the profile 15 (the size in the left-right direction) is D1, and the width of the oil guide groove 32 (the size in the left-right direction) is D2. In order to ensure that the filter 3 can catch the dripping oil and avoid oil droplets from overflowing or splashing, it is necessary to meet D2>D1, preferably D2≥D1+5mm.

Claims

1. A range hood, comprising a smoke collecting hood (1), the smoke collecting hood (1) comprising a hood body, the hood body being recessed upward from the bottom to form a smoke collecting chamber (13), the hood body being provided with an air inlet (14), the air inlet (14) being located at the top of the smoke collecting chamber (13), characterized in that: The top of the cover body located on the left and right sides of the air inlet (14) is in a transversely extending shape, and the top of the cover body located on the left and right sides of the air inlet (14) are respectively provided with pressure profiles (15), and the pressure profiles (15) are formed by a part of the cover body being recessed downward; a filter screen (3) is provided in the smoke collecting chamber (13), and the filter screen (3) can receive oil dripping from the lower surface of the pressure profile (15); The filter screen (3) comprises at least two meshes (31), each mesh (31) is in a long strip shape and extends in the front-rear direction, each mesh (31) is arranged at intervals in the left-right direction, and the portion between adjacent meshes (31) forms an oil guide groove (32), the pressure profile (15) corresponds to the oil guide groove (32), and the lowest point of the pressure profile (15) is located above the corresponding oil guide groove (32); The pressure profile (15) has a straight transition area (151) at the bottom, the width of the transition area (151) in the left-right direction is D1, the width of the oil guide groove (32) in the left-right direction is D2, and D2>D1 is satisfied; The mesh (31) is a flanged hole with the left and right sides flanged upward; The pressure profile (15) is V-shaped, and the angles between the left and right sides of the pressure profile (15) and the horizontal direction are both in the range of 10° to 40°.

2. The range hood according to claim 1, characterized in that: Each of the left and right sides of the cover body has at least two pressed profiles (15), and the pressed profiles (15) are arranged in parallel in the left-right direction.

3. The range hood according to claim 1 or 2, characterized in that: The cover body comprises an inner cover (11) and an outer cover (12) arranged outside the inner cover (11); the inner cover (11) is recessed upward from the bottom to form the smoke collecting chamber (13); and the pressed profile (15) is formed on the inner cover (11).

4. The range hood according to claim 1 or 2, characterized in that: An oil cup (4) is provided at the rear bottom of the smoke collecting hood (1), and the rear end of the filter screen (3) is located above the oil cup (4).

5. The range hood according to claim 4, characterized in that: The filter screen (3) gradually tilts downward from front to back, and the inclination angle of the filter screen (3) relative to the horizontal direction is α2, and satisfies 12.5°≤α2≤25°.

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