Range hood

Abstract

The utility model discloses a range hood which comprises a box body, a fan at least partially arranged in the box body and an air outlet cover arranged at an air outlet of the fan, the box body comprises a top plate, the top plate is provided with an air outlet, and the air outlet cover is connected with the top plate and arranged at the position corresponding to the air outlet; the range hood further comprises a sealing gasket pressed between the air outlet cover and the top plate. The top plate is provided with a turnup which is bent and extends upwards at the edge of the air outlet, the sealing gasket comprises an annular sealing gasket body and a skirt which is formed on the inner circumferential wall of the sealing gasket body, and the skirt is a flexible part and is at least in the following two states: in the first state, the fan is turned off, and in the second state, the fan is turned on; the skirt edge abuts against the turned-over edge under the action of gravity. And in the second state, the fan is turned on, and the skirt edge is turned upwards to leave the turned-over edge.

Description

TECHNICAL FIELD

[0001] The utility model relates to an oil fume purification device, especially an oil fume extractor. BACKGROUND

[0002] The oil fume extractor has become one of the indispensable kitchen household electrical appliances in modern families, and the oil fume extractor works by using the principle of fluid dynamics, absorbs and discharges the oil fume through the centrifugal fan installed in the oil fume extractor, and filters part of the oil particles by using the filter screen.

[0003] The existing oil fume extractor is generally provided with an air outlet cover at the air outlet of the fan, and the air outlet cover has the functions of air gathering and guiding and connecting the oil fume extractor and the air outlet pipe. The existing oil fume extractor usually adopts a rubber pad to press the sealing gasket tightly by screw fastening to prevent the accumulated oil in the air duct from leaking out of the interface between the top plate of the centrifugal fan at the air outlet end and the air outlet cover. For example, a kind of box body and oil fume extractor disclosed in Chinese patent application No. 202021920324.4 is used to install the air duct assembly, which comprises a box body and a check valve. The box body is provided with an air outlet, and the check valve is arranged corresponding to the air outlet and connected to the box body. The circumferential side wall of the air outlet is outwardly flanged to form a stop ring wall away from the inside of the box body. The connection position between the check valve and the box body is located in the annular space of the stop ring wall.

[0004] Due to the wind pressure existing in the air duct, the accumulated oil will be accumulated at the joint between the sealing gasket and the top plate of the box body, and under the action of changing wind pressure, the oil molecules will penetrate through the contact gap to the outer wall of the air duct. Although the stop ring wall is provided, oil leakage will still occur after a long time of use. INVENTION CONTENTS

[0005] The utility model solves the technical problems existing in the prior art, provides an oil fume extractor, and reduces the gap oil leakage and oil accumulation at the installation position of the air outlet cover.

[0006] The utility model adopts the technical scheme for solving the above technical problems: an oil fume extractor, which comprises a box body, a fan arranged at least partially in the box body, and an air outlet cover arranged at the air outlet of the fan. The box body comprises a top plate, the top plate is provided with an air outlet, the air outlet cover is connected with the top plate and arranged at a position corresponding to the air outlet, and the oil fume extractor further comprises a sealing gasket compressed between the air outlet cover and the top plate. The utility model is characterized in that:

[0007] The top plate is formed with a flange extending upwardly and bent at the edge of the air outlet, the sealing gasket comprises a ring-shaped sealing gasket body and a skirt formed on the inner circumferential wall of the sealing gasket body, the skirt is a flexible member and at least in the following two states:

[0008] In the first state, when the fan is turned off, the skirt is abutted on the flange under the action of gravity.

[0009] In the second state, the fan is turned on, and the skirt is turned up to be away from the turn-up edge.

[0010] By setting the skirt on the sealing gasket and the turn-up edge on the top plate, mechanical extrusion sealing is achieved simply by the gravity of the skirt, and negative pressure power suction is achieved by the wind power of the fan, so that the oil stains are prevented from leaking out through the gap under the action of the pipeline pressure.

[0011] Preferably, the skirt is arranged to rotate relative to the body of the sealing gasket.

[0012] Preferably, in the first state, the skirt is arranged to be inwardly beyond the turn-up edge, so that when the skirt is flush with the turn-up edge or outwardly beyond the turn-up edge, the oil stains are still prevented from entering between the skirt and the turn-up edge.

[0013] Further, in order to facilitate the positioning of the air outlet cover and the sealing gasket, the air outlet cover comprises a cover body and a mounting portion formed at the bottom of the cover body, and the mounting portion comprises an annular outer side wall.

[0014] The sealing gasket further comprises a first blocking edge and a second blocking edge, the first blocking edge and the second blocking edge are arranged close to the outer periphery of the body of the sealing gasket, and the outer side wall is inserted between the first blocking edge and the second blocking edge.

[0015] Further, in order to facilitate the positioning of the air outlet cover and the sealing gasket, the mounting portion further comprises an annular inner side wall arranged at the inner side of the outer side wall, and the sealing gasket further comprises a third blocking edge arranged close to the inner periphery of the body of the sealing gasket, and the inner side wall abuts against the inner periphery of the third blocking edge.

[0016] Further, in order to facilitate the positioning of the sealing gasket and the top plate, the top plate further comprises a stop wall arranged at the outer periphery of the turn-up edge, the turn-up edge and the stop wall are arranged in a spaced manner, and a groove for limiting the sealing gasket is formed between the turn-up edge and the stop wall.

[0017] Compared with the prior art, the advantages of the utility model lie in that by setting the skirt on the sealing gasket and the turn-up edge on the top plate, mechanical extrusion sealing is achieved simply by the gravity of the skirt, and negative pressure power suction is achieved by the wind power of the fan, so that the oil stains are prevented from leaking out through the gap under the action of the pipeline pressure. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic view of the range hood of the utility model embodiment;

[0019] Figure 2 It is a cutaway view of the range hood of the utility model embodiment in the off state;

[0020] Figure 3 It is a cutaway view of the range hood of the utility model embodiment in the off state; Figure 2 It is a local Ⅰ enlarged schematic view;

[0021] Figure 4 Figure 2 is a disassembled structural schematic view of the range hood according to an embodiment of the present application;

[0022] Figure 5 Figure 3 is a top view of the fan frame of the range hood according to an embodiment of the present application;

[0023] Figure 6 Figure 4 is a schematic view of the sealing gasket of the range hood according to an embodiment of the present application;

[0024] Figure 7 Figure 5 is a start-up state sectional view of the range hood according to an embodiment of the present application;

[0025] Figure 8 Figure 6 is a partial II enlarged schematic view of the range hood according to an embodiment of the present application. Figure 7 DETAILED DESCRIPTION

[0026] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions.

[0027] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "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 the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, since the embodiments disclosed by the present application can be arranged in different directions, so these orientation-indicating terms are only as an illustration and should not be regarded as a limitation, such as "upper", "lower" are not necessarily limited to the direction opposite or consistent with the direction of gravity. In addition, the features defined as "first", "second" can explicitly or implicitly include one or more of the features.

[0028] Referring to Figures 1-6 ​A kind of range hood, including box 1, fan 2 at least partially arranged in box 1 and the air outlet cover 3 being arranged at the air outlet of fan 2.In the present example, air inlet assembly 4 is arranged below box 1, fan 2 is completely placed in box 1, and the whole mechanism is configured as low suction mode range hood.Alternatively, range hood can also be existing side suction type, top suction type, etc., when range hood is side suction type, since fan 2 can be completely placed in side suction mode air inlet assembly 4, thereby making air inlet assembly 4 and box 1 integrated, or fan 2 can be partially placed in air inlet assembly 4 and partially placed in box 1.In summary, as long as box 1 includes top plate 11 at the top, the air outlet of fan 2 is connected at the top plate 11 of box 1, and the function of box 1, whether fan 2 is completely accommodated in box 1 is not limited.Oil cup 6 is arranged at the bottom of air inlet assembly 4.

[0029] Air outlet 111 is formed on top plate 11, and flange 112 is formed on the edge of air outlet 111 and extends upwards, and top plate 11 further includes stop wall 114 arranged on the outer periphery of flange 112, flange 112 and stop wall 114 are arranged in a spaced manner, thereby forming groove 113 between flange 112 and stop wall 114.

[0030] Air outlet cover 3 is connected with top plate 11, and the position of air outlet cover 3 corresponds to air outlet 111, so as to communicate with fan 2 through air outlet 111 of top plate 11.Range hood further includes sealing gasket 5, which is compressed between air outlet cover 3 and top plate 11.Sealing gasket 5 is arranged at groove 113, so as to limit sealing gasket 5 through groove 113.

[0031] Sealing gasket 5 includes annular sealing gasket body 51, first and second flanges 52 and 53 close to the outer periphery of sealing gasket body 51, third flange 54 close to the inner periphery of sealing gasket body 51, and skirt 55 formed on the inner peripheral wall of sealing gasket body 51.Air outlet cover 3 includes cover body 31 and mounting portion 32 formed at the bottom of cover body 31, and mounting portion 32 includes annular outer side wall 321 and annular inner side wall 322 arranged in a spaced manner on the inner side of outer side wall 321.During installation, outer side wall 321 is inserted into first and second flanges 52 and 53, and inner side wall 322 abuts against the inner periphery of third flange 54, thereby limiting the position of air outlet cover 3, and through subsequent fixing of screws and the like, each side wall can compress sealing gasket 5 and top plate 11.

[0032] Skirt 55 is a flexible edge, which can rotate relative to sealing gasket body 51 under the action of wind force and gravity, and the rotation axis of skirt 55 extends in a horizontal direction in the installed state.The length of skirt 55 is suitable, which can cover flange 112 of top plate 11.

[0033] Referring to Figure 2 And Figure 3When the fan 2 is not started, the skirt 55 is in the first state, the oil accumulated on the inner wall of the air outlet cover 3 flows down along the inner wall, when reaching the skirt 55 of the sealing gasket 5, the skirt 55 covers the flange 112 and exceeds the flange 112 inwardly under the action of gravity, so that the oil can not enter the space between the skirt 55 and the flange 112 when the skirt 55 is flush with the flange 112 or outwardly exceeds the flange 112. The oil flows along the inclined surface of the skirt 55 to the air outlet of the fan and then to the oil cup 6 at the bottom, and the flow path of the oil can be seen by arrows in Figure 3 .

[0034] Referring to Figure 7 and Figure 8 When the fan 2 is started, the skirt 55 is in the second state, the upward air force makes the skirt 55 turn upward against the gravity, and the oil accumulated on the inner wall of the air outlet cover 3 does not flow downward under the action of the air force. The interlayer sealing channel formed by the skirt 55 and the flange 112 of the top plate 11 is opened, the airflow forms a negative pressure area Q at the skirt 55 of the sealing gasket 5 and the flange 112 of the top plate 11, the external air at the joint of the top plate 11 and the air outlet cover 3 passes through the gap between the sealing gasket 5 and the top plate 11 and is discharged to the outside through the negative pressure area Q along with the flue gas, and no oil is accumulated in the negative pressure area Q, and the discharge path of the external air can be seen by arrows in Figure 8 .

[0035] The "fluid communication" in the utility model refers to the spatial position relationship between two components or parts (hereinafter referred to as the first part and the second part), i.e. the fluid (gas, liquid or mixture of the two) can flow or / and be transported from the first part to the second part along the flow path, which can be directly connected between the first part and the second part, or indirectly connected between the first part and the second part through at least one third party, which can be a fluid passage such as a pipeline, a channel, a conduit, a flow guide, a hole, a groove, etc., or a chamber allowing the fluid to flow or a combination thereof.

Claims

1. A range hood, comprising a cabinet (1), a fan (2) arranged at least partially in the cabinet (1), and an air outlet cover (3) arranged at an air outlet of the fan (2), the cabinet (1) comprising a top plate (11) having an air outlet (111) formed therein, the air outlet cover (3) being connected to the top plate (11) and arranged at a position corresponding to the air outlet (111); the range hood further comprising a sealing gasket (5) compressed between the air outlet cover (3) and the top plate (11); characterized in that: the top plate (11) is formed with a bent-over flange (112) extending upward at a periphery of the air outlet (111), the sealing gasket (5) comprises a ring-shaped gasket body (51) and a skirt (55) formed on an inner peripheral wall of the gasket body (51), the skirt (55) being a flexible member and being in at least one of the following two states: in a first state, the fan (2) is off, and the skirt (55) is abutted against the bent-over flange (112) under the action of gravity; in a second state, the fan (2) is on, and the skirt (55) is flipped upward to be separated from the bent-over flange (112); the skirt (55) is rotatably arranged relative to the gasket body (51); in the first state, the skirt (55) extends inward beyond the bent-over flange (112); the air outlet cover (3) comprises a cover body (31) and a mounting portion (32) formed at a bottom of the cover body (31), the mounting portion (32) comprising a ring-shaped outer side wall (321); the sealing gasket (5) further comprises a first retaining edge (52) and a second retaining edge (53), the first retaining edge (52) and the second retaining edge (53) being arranged close to an outer periphery of the gasket body (51), and the outer side wall (321) being inserted between the first retaining edge (52) and the second retaining edge (53); the mounting portion (32) further comprises a ring-shaped inner side wall (322) arranged at an inner side of the outer side wall (321), and the sealing gasket (5) further comprises a third retaining edge (54) arranged close to an inner periphery of the gasket body (51), and the inner side wall (322) being abutted against the inner periphery of the third retaining edge (54); the top plate (11) further comprises a stop wall (114) arranged at an outer periphery of the bent-over flange (112), the bent-over flange (112) and the stop wall (114) being arranged in a spaced-apart manner, and a groove (113) for limiting the sealing gasket (5) being formed between the bent-over flange (112) and the stop wall (114). ​ ​ ​ 2. The hood according to claim 1, characterized in that: ​ 3. The hood according to claim 1, characterized in that: ​ 4. The hood according to claim 1, characterized in that: ​ ​ 5. The hood according to claim 4, characterized in that: ​ 6. The hood according to any one of claims 1-5, characterized in that: ​

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