CN214700880U - Smoke exhaust ventilator - Google Patents

Abstract

The utility model belongs to the technical field of kitchen appliances, concretely relates to smoke ventilator. The utility model aims to solve the problem that oil drops pollute cooking utensils and cookers. The utility model discloses a smoke exhaust ventilator, which comprises an air duct shell and an oil screen positioned below the air duct shell; the oil screen is provided with a bearing area for bearing oil stains; the outer side of the air duct shell is also provided with at least one detection element and a guide plate, the guide plate is obliquely arranged relative to the horizontal plane, the top end of the guide plate is positioned under the at least one detection element, and the bottom end of the guide plate is positioned over the bearing area. The utility model discloses a smoke ventilator, after detecting element gathers oil in the oil smoke environment, oil on the detecting element drips under the action of gravity, drops on the guide plate to on the water conservancy diversion effect of guide plate flows to the accepting district, reduced the probability that oil that gathers on the detecting element drops on cooking utensils and pan.

Description

Smoke exhaust ventilator

Technical Field

The utility model belongs to the technical field of kitchen appliances, concretely relates to smoke ventilator.

Background

The kitchen ventilator is also called as a range hood, and is a kitchen appliance for purifying the kitchen environment. The range hood is usually installed above a kitchen range, and can rapidly pump away waste generated in the working process of the range and oil smoke harmful to human bodies generated in the cooking process and discharge the oil smoke out of a room. Smoke ventilator includes the casing usually, sets up at the inside wind channel shell of casing, the wind wheel that uses with the cooperation of wind channel shell to and be located structures such as collection petticoat pipe of wind wheel bottom, and the wind wheel during operation can be taken out the wind channel shell with the oil smoke that the collection petticoat pipe gathers together, and then from the wind channel shell discharge outdoor, so, realize purifying kitchen environment.

In the related art, the outer side wall of the air duct shell is also provided with a detection element for detecting the concentration of oil smoke and water vapor, the inner side of the smoke collecting hood is also provided with an oil net, the oil net is provided with a plurality of ventilation gaps which are arranged opposite to the detection element, and the ventilation gaps are used for allowing the oil smoke to enter the air duct in the air duct shell.

However, the sensing element collects oil droplets in the cooking environment. Under the action of gravity, oil drops can drop from the ventilation gap on the oil screen to the kitchen range below the range hood and the cooker placed on the kitchen range to pollute the kitchen range and the cooker.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, namely solving the problem that oil drops pollute a cooker and a pan, the utility model provides a range hood, which comprises an air duct shell and an oil screen positioned below the air duct shell; the oil screen is provided with a bearing area for bearing oil stains; the outer side of the air duct shell is also provided with at least one detection element and a guide plate, the guide plate is obliquely arranged relative to the horizontal plane, the top end of the guide plate is positioned under the at least one detection element, and the bottom end of the guide plate is positioned over the bearing area.

In the preferable technical scheme of the range hood, the air duct shell is a volute, an air inlet is formed in the side portion of the volute, an air outlet is formed in the top of the volute, a support is arranged on the outer peripheral side of the air inlet, and a guide plate and at least one detection element are arranged on the support.

In the preferable technical scheme of the range hood, a first installation part is arranged on the support, a detection element is installed on the first installation part, the first installation part is obliquely arranged, and the bottom end of the first installation part is positioned right above the guide plate.

In a preferred technical solution of the above range hood, the bracket is further provided with a second mounting portion, the second mounting portion is provided with another detection element, the second mounting portion is obliquely arranged, and a bottom end of the second mounting portion is located right above the receiving area.

In the preferable technical scheme of the range hood, the support is a semi-annular support, the semi-annular support is coaxial with the air inlet, and the first installation part and the second installation part are respectively located at two ends of the semi-annular support.

In the preferable technical scheme of the range hood, a second installation part is further arranged on the support, another detection element is installed on the second installation part, the second installation part is arranged in an inclined mode, the projection of the second installation part on the oil screen is located on the outer side of the receiving area, and the guide plate is used for receiving oil stains dropped from the two detection elements installed on the first installation part and the second installation part.

In the preferable technical scheme of the range hood, the support is a semi-annular support, the semi-annular support is coaxial with the air inlet, and the first installation part and the second installation part are respectively positioned at two ends of the semi-annular support; the guide plate is a semi-annular guide plate.

In a preferred embodiment of the range hood, the detecting element mounted on the first mounting portion is a light emitter, and the detecting element mounted on the second mounting portion is a light receiver; alternatively, the detecting element mounted on the first mounting portion is a light receiver, and the detecting element mounted on the second mounting portion is a light emitter.

In the preferable technical scheme of the range hood, the guide plate is an arc-shaped guide plate.

In the preferable technical scheme of the range hood, the width of the guide plate is gradually reduced from top to bottom.

In the preferable technical scheme of the range hood, the projection of the flow guide surface of the flow guide plate in a vertical plane is a steepest curve.

In the preferable technical scheme of the range hood, one end of the guide plate is fixed with the support, the guide surface of the guide plate is provided with the reinforcing rib, the first edge of the reinforcing rib is connected with the support, and the second edge of the reinforcing rib is connected with the guide plate.

The technical personnel in the field can understand, the utility model discloses a smoke ventilator, set up the oil net in the below of wind channel shell, set up detecting element and guide plate in the outside of wind channel shell, and make the relative horizontal plane slope of guide plate set up, the top of guide plate is located detecting element under, the bottom of guide plate is located the accepting area on the oil net directly over, so, after detecting element gathers oil in the oil smoke environment, oil drips on the detecting element under the action of gravity, drop on the guide plate, and water conservancy diversion to accepting the district under the water conservancy diversion effect of guide plate on, reduce the probability that the oil that gathers on the detecting element drops on cooking utensils and pan.

Drawings

Preferred embodiments of the range hood of the present invention will be described below with reference to the accompanying drawings. The attached drawings are as follows:

fig. 1 is a first schematic structural diagram of the range hood of the present invention;

FIG. 2 is a schematic structural view of a range hood according to the present invention;

FIG. 3 is a schematic view of the assembly of the middle bracket and the volute casing of the present invention;

FIG. 4 is a schematic structural diagram of the oil screen of the present invention;

fig. 5 is a schematic structural view of the bracket of the present invention;

fig. 6 is an exploded view of the middle bracket, the first mounting portion and the second mounting portion of the present invention;

fig. 7 is an assembly view of the middle bracket, the first mounting portion and the second mounting portion of the present invention;

fig. 8 is an assembly diagram of the middle bracket and the flow guide member of the present invention.

In the drawings:

100: an air duct housing; 101: a volute;

102: an air inlet; 103: an air outlet;

200: a smoke collecting hood; 201: an oil screen;

202: a carrying area; 203: a gathering region;

204: a ventilation gap; 300: a baffle;

400: a support; 401: a first rib;

402: a second rib; 403: a first mounting hole;

404: a reinforcing pad; 405: a first mounting portion;

406: a first inner cylinder; 407: a first outer barrel;

408: a first pipe body; 409: a first convex edge;

410: a second mounting hole; 411: a third mounting hole;

412: a first avoidance hole; 413: a second mounting portion;

414: a second inner barrel; 415: a second outer barrel;

416: a second tube body; 417: a second convex edge;

418: a fourth mounting hole; 419: a fifth mounting hole;

420: a second avoidance hole; 421: reinforcing ribs;

500: a main box shell.

Detailed Description

First of all, it should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. And can be adjusted as needed by those skilled in the art to suit particular applications.

Next, it should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "inside", "outside", and the like are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that a device or member must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Related art's smoke ventilator usually includes the casing, sets up the wind channel shell in the casing inside, with the wind wheel that the cooperation of wind channel shell was used to and be located the structure such as collection petticoat pipe of wind wheel bottom, the wind wheel during operation can be taken out the wind channel shell with the oil smoke that the collection petticoat pipe was gathered together, and then outside the air channel shell discharge chamber, so, the realization purifies the kitchen environment.

In the correlation technique, the outer side wall of the air duct shell is also provided with a detection element for detecting the concentration of oil smoke and water vapor, the inner side of the smoke collecting hood is provided with an oil net, the detection element and a plurality of ventilation gaps arranged on the oil net are arranged oppositely, and the ventilation gaps are used for the air duct in which the oil smoke enters the air duct shell.

However, the sensing element collects oil droplets in the cooking environment. Under the action of gravity, oil drops can drop from the ventilation gap on the oil screen to the kitchen range below the range hood and the cooker placed on the kitchen range to pollute the kitchen range and the cooker.

In order to solve the correlation technique, the problem that oil drips on the detecting element pollutes cooking utensils and pan, the utility model provides a smoke ventilator, it sets up the guide plate through the outside at the wind channel shell, make the relative horizontal plane slope of guide plate set up, and make the top of guide plate be located detecting element under, the bottom of guide plate is located directly over the accepting region of oil net, so, utilize the guide plate to accept the oil that gathers on the detecting element and drip, and the oil that will accept drips the water conservancy diversion and collect the accepting region of oil net, so that the oil that gathers on the detecting element drips and collect in the oil cup, effectively reduce the oil that gathers on the detecting element and pass the ventilation space on the oil net, the probability that drops on cooking utensils and pan.

Referring to fig. 1 and 2, the present invention provides a range hood, which includes a duct housing 100, a smoke collecting hood 200 located below the duct housing 100, and an oil net 201 located inside the smoke collecting hood 200.

An air duct is formed inside the air duct shell 100, a wind wheel is arranged in the air duct shell 100, the wind wheel is in transmission connection with a motor, and the motor drives the wind wheel to rotate so as to be matched with the air duct shell 100 to suck oil smoke. In some embodiments, as shown in fig. 3, the air duct casing 100 is a volute 101, an air inlet 102 is disposed at a side of the volute 101, an air outlet 103 is disposed at a top of the volute 101, and the volute 101 and a wind wheel inside the volute cooperate to form a centrifugal fan, so as to effectively suck oil smoke.

Referring to fig. 2 and 4, the smoke collection cover 200 is generally trumpet-shaped, a large end of the smoke collection cover 200 is opened toward the kitchen range, and the smoke collection cover 200 is used for collecting the oil smoke. The oil screen 201 is arranged inside the smoke collecting hood 200, the oil screen 201 is positioned below the air duct shell 100, the oil screen 201 is provided with a receiving area 202 for receiving oil stains, the receiving area 202 is generally rectangular, the oil screen 201 is further provided with a gathering area 203 positioned on the outer peripheral side of the receiving area 202, the gathering area 203 is approximately conical, the large end of the gathering area 203 is opened towards a stove, the small end of the gathering area 203 is opened and covered with the receiving area 202, and the receiving area 202 and the gathering area 203 are generally integrally formed and form the oil screen 201. The gathering area 203 is also provided with a plurality of ventilation gaps 204, and when the wind wheel runs, the oil smoke flows into the air channel from the ventilation gaps 204 and is discharged to the outside.

Referring to fig. 2 and fig. 3, at least one detecting element and a flow guide plate 300 are further disposed on the outer side of the air duct housing 100, the flow guide plate 300 is disposed in an inclined manner relative to the horizontal plane, the top end of the flow guide plate 300 is located right below the at least one detecting element, and the bottom end of the flow guide plate 300 is located right above the receiving area 202. The detection element can be, for example, a lampblack sensor for detecting lampblack concentration, the detection element is located in a lampblack environment for a long time, oil drops are accumulated on the detection element and can fall off under the self gravity, the top end of the guide plate 300 is located right below the detection element, the oil drops accumulated on the detection element can fall on the guide plate 300 below the detection element, the guide plate 300 is arranged in an inclined mode relative to the horizontal plane, the oil drops falling on the guide plate 300 can flow on the guide surface of the guide plate 300 and flow to the bottom end of the guide plate 300 from the top end of the guide plate 300, the bottom end of the guide plate 300 is located right above the bearing area 202, and therefore the oil drops can fall on the bearing area 202 from the bottom end of the guide plate 300 and further flow into an oil cup of a range hood from the bearing area 202, the probability that the oil drops on the detection element pass through the ventilation gap 204 and fall on a cooker and a cooker is effectively reduced, thereby effectively reducing the pollution probability of the cooking utensils and the cookware.

The mounting of the detection element is explained in detail below by means of some embodiments.

Referring to fig. 3, a bracket 400 is disposed on the volute 101, the bracket 400 is located on an outer peripheral side of the air inlet 102, the bracket 400 is provided with a flow guide plate 300 and at least one detection element, the bracket 400 is used for disposing the flow guide plate 300 and the detection element on the volute 101, and the bracket 400 may be disposed on the volute 101 by welding, screwing, or the like. The baffle 300 can be a unitary structure with the rack 400, and the baffle 300 can also be disposed on the rack 400 by welding.

Referring to fig. 5, the bracket 400 may be, for example, a semi-annular bracket, the bracket 400 may be an injection molded part, a side of the bracket 400 facing the volute 101 is provided with a plurality of first ribs 401 extending in the radial direction and a plurality of second ribs 402 extending in the circumferential direction, the number of the first ribs 401 may be a plurality, the number of the second ribs 402 may be a plurality, and the first ribs 401 and the second ribs 402 are staggered to form a grid shape, so that the strength of the bracket 400 is increased.

Referring to fig. 5, a plurality of first mounting holes 403 are formed in the bracket 400, and a first fastening member for mounting the bracket 400 on the scroll casing 101 is inserted into each first mounting hole 403. The side of the bracket 400 facing the volute 101 is further provided with a plurality of reinforcing pads 404, and each reinforcing pad 404 is correspondingly arranged on the outer peripheral side of one first mounting hole 403 to increase the strength of the bracket 400 at the first mounting hole 403.

Referring to fig. 3 and 6, the bracket 400 may further include a first mounting portion 405, a detection element is mounted on the first mounting portion 405, the first mounting portion 405 is disposed in an inclined manner, and a bottom end of the first mounting portion 405 is located right above the baffle 300. The first mounting portion 405 is used to mount one detection element on the holder 400, and the first mounting portion 405 may include, for example, a first inner cylinder 406 and a first outer cylinder 407, the first outer cylinder 407 being disposed on the holder 400, the first inner cylinder 406 being fitted in the first outer cylinder 407, and the first inner cylinder 406 and the first outer cylinder 407 together forming a mounting space in which the detection element is mounted, so that mounting of the detection element on the holder 400 is achieved.

Referring to fig. 3 and fig. 6, a first tube 408 is convexly disposed on an outer side wall of the first outer tube 407, a first protruding edge 409 is disposed at a terminal end of the first tube 408, a second mounting hole 410 is disposed on the first protruding edge 409, correspondingly, a third mounting hole 411 is disposed on the bracket 400, and a second fastener is inserted into the second mounting hole 410 and the third mounting hole 411 to mount the first outer tube 407 on the bracket 400. The bracket 400 is further provided with a first avoiding hole 412 opposite to the first tube 408, and an electric wire for supplying power to the detection element mounted in the first mounting portion 405 penetrates through the first avoiding hole 412 and the first tube 408.

Referring to fig. 3 and 7, the bracket 400 is further provided with a second mounting portion 413, the second mounting portion 413 is provided with another detecting element, the second mounting portion 413 is obliquely arranged, and the bottom end of the second mounting portion 413 is located right above the receiving area 202. The second mounting portion 413 is used for mounting a detecting element on the bracket 400, the second mounting portion 413 may include, for example, a second inner cylinder 414 and a second outer cylinder 415, the second outer cylinder 415 is disposed on the bracket 400, the second inner cylinder 414 is fitted into the second outer cylinder 415, and the second inner cylinder 414 and the second outer cylinder 415 together form a mounting space for mounting the detecting element, so that the detecting element is mounted on the bracket 400. After the detection element of installation has accumulated oil in the oil smoke environment on second installation portion 413, oil drips and drops under self action of gravity to drop on accepting district 202, and then flow to the oil cup from accepting district 202, so, also can effectively reduce the probability that the oil that accumulates drops on cooking utensils and pan on the detection element, and then reduce the probability of polluting cooking utensils and pan.

Referring to fig. 6 and 7, a second tube 416 is convexly disposed on an outer side wall of the second outer tube 415, a second flange 417 is disposed at a distal end of the second tube 416, a fourth mounting hole 418 is disposed on the second flange 417, correspondingly, a fifth mounting hole 419 is disposed on the bracket 400, and third fasteners are inserted into the fourth mounting hole 418 and the fifth mounting hole 419 to mount the second outer tube 415 on the bracket 400, wherein a second avoiding hole 420 opposite to the second tube 416 is further disposed on the bracket 400, and an electric wire for supplying power to the detecting element mounted in the second mounting portion 413 is inserted into the second avoiding hole 420 and the second tube 416.

Referring to fig. 3, the bracket 400 may be a semi-annular bracket, the semi-annular bracket is coaxial with the air inlet 102, and the first mounting portion 405 and the second mounting portion 413 are respectively located at two ends of the semi-annular bracket. Wherein, the detecting element of installation on first installation department 405 can be the light emitter, the detecting element of installation can be light receiver on the second installation department 413, or, the detecting element of installation can be light receiver on the first installation department 405, the detecting element of installation can be the light emitter on the second installation department 413, the light emitter is used for sending light, light receiver is used for receiving light, when the environment that light emitter and light receiver were located was the oil smoke environment, the light that the light emitter sent takes place the scattering after meetting the oil smoke particle, after the light of process scattering reachs light receiver, the light that light receiver received can be different because the oil smoke concentration is different, so, realize detecting oil smoke concentration through the cooperation of light receiver and light emitter.

In some of the above embodiments of the detection element mounting, the structure of the baffle 300 will be described in detail.

Referring to fig. 3, the baffle 300 may be an arc-shaped baffle. In some embodiments, the volute 101 has a circular inlet 102, the bracket 400 is a semi-annular bracket coaxial with the inlet 102, and the baffle 300 is a circular-arc baffle, and the baffle 300 in this embodiment is coaxial with the bracket 400, that is, the baffle 300 in this embodiment and the bracket 400 in this embodiment, and the inlet 102 in this embodiment are coaxial.

Referring to fig. 3, the width of the baffle 300 is gradually reduced from top to bottom, for example, the baffle 300 is substantially triangular, wherein the first side of the baffle 300 is connected to the bracket 400, the second side of the baffle 300 is disposed to be inclined with respect to the first side of the baffle 300, the third side of the baffle 300 is substantially perpendicular to the bracket 400, and the distance from the second side of the baffle 300 to the first side of the baffle 300 is gradually reduced from top to bottom, so that the end with the larger width of the baffle 300 is the top end of the baffle 300, the end with the smaller width of the baffle 300 is the bottom end of the baffle 300, and the width of the baffle 300 is gradually reduced from the top end of the baffle 300 to the bottom end of the baffle 300. After oil drips on the guide plate 300, because the width of guide plate 300 reduces gradually, oil drips can be gradually from last down to assemble on the water conservancy diversion face of guide plate 300, and then drops on the accepting region 202, also promptly, the width of guide plate 300 is from last down to reduce gradually, can play the effect of converging to the oil drips that drips on guide plate 300.

The projection of the flow guiding surface of flow guiding plate 300 in the vertical plane, which is the vertical plane parallel to the side of scroll 101, may be the fastest curve. When oil drops are accumulated on the detection element, the oil drops drop on the guide plate 300 under the action of self gravity, and the oil drops falling on the guide surface of the guide plate 300 can flow fast and then flow onto the bearing surface fast. Compare the projection of the water conservancy diversion face of guide plate 300 in vertical plane for straight line, or circular arc curve etc. oil drips and falls on the water conservancy diversion face of guide plate 300 in this embodiment, and the time that oil drips the bottom cost of guide plate 300 from the top of guide plate 300 is the shortest, can in time effectively arrange oil drip on accepting the district 202.

In some embodiments, the edge of the diversion surface of the diversion plate 300 departing from the volute 101 is higher than the edge of the diversion plate 300 connected with the volute 101, at this time, a groove for oil drop flowing can be enclosed between the diversion surface of the diversion plate 300 and the outer side surface of the volute 101, so that oil drops flow to the receiving area 202 from the bottom end of the diversion plate 300, the probability that oil drops flow out from the edge of the diversion plate 300 departing from the volute 101 and drop on a cooker and a cooker through the ventilation gap 204 on the gathering area 203 is reduced, and the probability that oil drops pollute the cooker is reduced.

Referring to fig. 8, one end of the baffle 300 is fixed to the bracket 400, the baffle surface of the baffle 300 is provided with a stiffener 421, a first edge of the stiffener 421 is connected to the bracket 400, and a second edge of the stiffener 421 is connected to the baffle 300, so that the stiffener 421 can reliably mount the baffle 300 on the bracket 400. The number of the reinforcing ribs 421 may be plural, for example, the number of the reinforcing ribs 421 is three, and three reinforcing ribs 421 may enable the baffle 300 to be more reliably mounted on the bracket 400.

Other embodiments of the detection element mounting are given below, and the mounting of the detection element is further described in detail.

In other embodiments, a first mounting portion 405 is disposed on the bracket 400, one detection element is mounted on the first mounting portion 405, the first mounting portion 405 is disposed in an inclined manner, a bottom end of the first mounting portion 405 is located directly above the air deflector 300, a second mounting portion 413 is further disposed on the bracket 400, another detection element is mounted on the second mounting portion 413, the second mounting portion 413 is disposed in an inclined manner, a projection of the second mounting portion 413 is located outside the receiving area 202, a bottom end of the second mounting portion 413 is also located directly above the air deflector 300, and the air deflector 300 is used for receiving oil stains dropped from the two detection elements mounted on the first mounting portion 405 and the second mounting portion 413. In this embodiment, the guide plate 300 is located directly below the first installation portion 405 and the second installation portion 413, oil drops accumulated on the detection element installed on the first installation portion 405 fall on the guide plate 300, oil drops accumulated on the detection element installed on the second installation portion 413 fall on the guide plate 300, and oil drops falling on the guide plate 300 fall on the receiving area 202, so that the probability that the oil drops pollute the kitchen range and the cooker is effectively reduced.

In this embodiment, the support 400 may also be a semi-annular support, the semi-annular support is coaxial with the air inlet 102, the first mounting portion 405 and the second mounting portion 413 are respectively located at two ends of the semi-annular support, the baffle 300 is a semi-annular baffle, two ends of the semi-annular baffle are respectively located right below the first mounting portion 405 and the second mounting portion 413, two ends of the semi-annular baffle are top ends of the baffle 300, and a substantially middle position of the semi-annular baffle is a bottom end of the baffle 300.

The range hood of the embodiment also comprises a main control board which is in communication connection with the detection element, when the detection element detects that the oil smoke exists in the environment, the main control panel controls the wind wheel to start according to the detection result of the detection element, so that the wind wheel operates to suck oil smoke, when the detection element detects that the concentration of the oil smoke existing in the environment is high, the main control panel controls the increase of the rotating speed of the wind wheel according to the detection result of the detection element so as to effectively discharge the oil smoke outdoors in time, when the detection element detects that the concentration of the oil smoke existing in the environment is small, the main control panel controls and reduces the rotating speed of the wind wheel according to the detection structure of the detection element, so that the energy consumption and the noise are reduced while the oil smoke is discharged outdoors in time, when the detection element detects that the oil smoke hardly exists in the environment, the main control panel controls the wind wheel to stop according to the detection result of the detection element so as to reduce energy consumption and noise.

The smoke ventilator of this embodiment, when the operator cooks in the kitchen, the smoke ventilator can be automatically according to the oil smoke size, opening, closing and the slew velocity of control wind wheel, need not any position that the operator used the health and operates smoke ventilator, has liberated operator's both hands, and also can effectively reduce the oil that the operator carried on both hands, material such as flour, water cause the pollution to smoke ventilator.

Referring to fig. 1, the range hood of the present embodiment further includes a main box housing 500, and the air duct housing 100, the bracket 400, and the flow guide plate 300 disposed on the bracket 400 are disposed in the main box housing 500, so that the range hood has a neat and beautiful appearance.

So far, the technical solution of the present invention has been described with reference to the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, a person skilled in the art can make equivalent changes or substitutions to the related technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims (10)

1. A range hood is characterized by comprising an air duct shell and an oil screen positioned below the air duct shell;

the oil net is provided with a bearing area for bearing oil stains;

the outer side of the air duct shell is further provided with at least one detection element and a guide plate, the guide plate is arranged in an inclined mode relative to the horizontal plane, the top end of the guide plate is located under at least one detection element, and the bottom end of the guide plate is located over the bearing area.

2. The range hood of claim 1, wherein the duct housing is a volute, an air inlet is formed in a side portion of the volute, an air outlet is formed in a top portion of the volute, a support is arranged on an outer peripheral side of the air inlet, and the guide plate and the at least one detection element are arranged on the support.

3. The range hood of claim 2, wherein the bracket is provided with a first mounting portion, the first mounting portion is provided with one of the detecting elements, the first mounting portion is arranged in an inclined manner, and the bottom end of the first mounting portion is positioned right above the guide plate.

4. The range hood of claim 3, wherein the bracket is further provided with a second mounting part, another detection element is mounted on the second mounting part, the second mounting part is obliquely arranged, and the bottom end of the second mounting part is positioned right above the bearing area.

5. The range hood of claim 4, wherein the bracket is a semi-annular bracket, the semi-annular bracket is coaxial with the air inlet, and the first mounting portion and the second mounting portion are respectively located at two ends of the semi-annular bracket.

6. The range hood of claim 3, wherein the bracket is further provided with a second mounting part, the second mounting part is provided with another detection element, the second mounting part is arranged obliquely, and the projection of the second mounting part on the oil screen is positioned outside the receiving area; the guide plate is used for receiving oil stains which are dripped by the detection elements and are arranged on the first installation part and the second installation part.

7. The range hood of claim 6, wherein the bracket is a semi-annular bracket, the semi-annular bracket is coaxial with the air inlet, and the first mounting portion and the second mounting portion are respectively located at two ends of the semi-annular bracket;

the guide plate is a semi-annular guide plate.

8. The range hood of any of claims 4-7, wherein the sensing element mounted on the first mounting portion is a light emitter and the sensing element mounted on the second mounting portion is a light receiver; or,

the detection element that installs on the first installation department is photoreceiver, the detection element that installs on the second installation department is the light emitter.

9. The range hood of any of claims 1-7, wherein the deflector is an arcuate deflector; and/or the width of the guide plate is gradually reduced from top to bottom.

10. The range hood of any of claims 2-7, wherein the projection of the flow guide surface of the flow guide plate in a vertical plane is a steepest curve; and/or one end of the guide plate is fixed with the support, a reinforcing rib is arranged on the guide surface of the guide plate, the first edge of the reinforcing rib is connected with the support, and the second edge of the reinforcing rib is connected with the guide plate.

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