CN218096133U - Fume exhaust fan - Google Patents

Abstract

The utility model discloses a range hood, which comprises a shell, wherein the upper part of the front side of the shell is provided with an air inlet, the shell is provided with a smoke baffle plate which can open and close the air inlet in a turnover manner, the smoke baffle plate is provided with a flow guide cover towards one side in the shell, the flow guide cover comprises a first flow guide plate, and the first flow guide plate extends towards the inside of the shell from the lower end part of the smoke baffle plate in the opening state of the smoke baffle plate; the range hood further comprises a second guide plate, the lower end portion of the second guide plate is fixed at the position, located below the lower edge of the air inlet, of the inner side of the shell, the second guide plate gradually extends towards the direction in the shell from bottom to top in an inclined mode, and the included angle between the second guide plate and the first guide plate is an acute angle in the opening state of the smoke baffle. Compared with the prior art, the utility model has the advantages of: the two guide plates are respectively arranged at the upper end and the lower end of the air inlet, so that the oil smoke is bounded by the air inlet to form an air inlet area with a large outer part and a small inner part, the oil smoke can be accelerated to enter, and the oil smoke suction and exhaust efficiency is improved.

Description

Cooking fume exhauster

Technical Field

The utility model relates to an oil smoke purifier, especially a range hood.

Background

The range hood has become one of the indispensable kitchen household electrical appliances in modern families. The range hood works by utilizing the fluid dynamics principle, sucks and exhausts oil smoke through a centrifugal fan arranged in the range hood, and filters partial grease particles by using a filter screen. The centrifugal fan comprises a volute, an impeller arranged in the volute and a motor driving the impeller to rotate. When the impeller rotates, negative pressure suction is generated in the center of the fan, oil smoke below the range hood is sucked into the fan, and is accelerated by the fan, collected by the volute and guided to be discharged outdoors.

In order to expand the range of smoke collection, a range hood with side-suction type, low-suction type and other forms usually adopts a scheme of arranging a smoke baffle plate, for example, a range hood disclosed in chinese patent application No. 202210172767.7, comprising: the smoke collecting hood comprises a smoke collecting hood body, a filter screen and a smoke baffle plate, wherein the filter screen and the smoke baffle plate are movably connected with the smoke collecting hood body; a cleaning device for cleaning the filter screen is arranged in the smoke collecting hood and is positioned on the motion path of the filter screen; the range hood is in a starting state and a closing state, in the starting state, the filter screen is positioned at the position of the smoke suction port of the smoke collecting hood, and the smoke baffle plate opens the smoke suction port; in a closed state, the filter screen is positioned in the cleaning device, and the smoke baffle closes the smoke suction port.

Also, as disclosed in chinese patent application No. 202120811057.5, a range hood includes a box body, a smoke collection shell and a smoke blocking member, wherein the smoke collection shell is disposed at a lower side of the box body, a smoke collection chamber is formed inside the smoke collection shell, the smoke collection chamber is communicated with an air inlet of a fan, and a smoke inlet is formed at a front wall of the smoke collection shell; the smoke blocking piece is arranged on the upper side of the smoke inlet; when the smoke inlet is opened, the smoke blocking piece is turned from bottom to top.

According to the range hood in the prior art, the air inlet is arranged upwards, the negative pressure area is arranged upwards relatively, the smoking effect is relatively poor, oil smoke is easy to escape, if the air inlet is directly downwards moved, the oil smoke is easy to diffuse in a triangular area formed by the smoke baffle plate, and smoke escapes from a gap of the rotating shaft at the top; the scheme that the air inlet is close to the lower part, the smoke baffle plate is easy to interfere with the cooker in the moving and opening process, and the cooking space is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to the not enough of above-mentioned prior art existence, provide a range hood, can move the negative pressure zone outward for the air inlet wind speed increases oil smoke suction and exhaust efficiency.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a range hood, includes the casing, the air intake has been seted up on the front side upper portion of casing, be provided with the cigarette board that keeps off that can open and close the air intake on the casing with overturning, its characterized in that:

a flow guide cover is arranged on one side of the smoke baffle plate facing the shell, the flow guide cover comprises a first flow guide plate, and the first flow guide plate extends towards the inside of the shell from the lower end part of the smoke baffle plate in the opening state of the smoke baffle plate;

the range hood further comprises a second guide plate, the lower end portion of the second guide plate is fixed at the position, located below the lower edge of the air inlet, of the inner side of the shell, the second guide plate extends towards the inner side of the shell from bottom to top gradually, and in the opening state of the smoke baffle, an included angle between the second guide plate and the first guide plate is an acute angle.

In order to guide the oil stains dripped from the front side downwards so as to be collected, a folded edge fixed with the shell is formed at the lower end part of the second guide plate, and a first oil leakage hole is formed on the folded edge.

In order to facilitate the leading of the negative pressure region and enlarge the smoke collection range, the range hood further comprises an air inlet plate arranged corresponding to the air inlet, an opening for oil smoke to pass through is formed in the air inlet plate, the air inlet plate can extend out of the air inlet to be opened at least at the upper end part along with the opening of the smoke baffle plate, and the lower end part of the air inlet plate is kept in the shell.

In order to ensure good air performance of the outlet of the shell, the front side of the shell is gradually inclined backwards from top to bottom, the distance between the upper end part of the air inlet plate and the rear side of the shell is D1 in the state that the air inlet plate is opened, the thickness of the outlet of the upper end part of the shell is D2, and D1/D2 is more than or equal to 0.9.

In order to accelerate the flow rate of oil smoke at two sides and facilitate the suction of the oil smoke, the opening is in a shape with small left and right sides and large middle.

In order to facilitate guiding of the oil smoke passing through the opening, the air inlet plate further includes a turned-over edge formed at a side facing the inside of the housing, the turned-over edge being located at an edge of the opening.

In order to guide the oil dirt flowing downwards from the air inlet downwards so as to be collected, the lower end part of the air inlet plate is provided with a second oil leakage hole.

In order to facilitate linkage of the air inlet plate and the smoke baffle plate, the upper end part of the air inlet plate is rotatably connected with the flow guide cover, the lower end part of the air inlet plate is rotatably connected in the shell, and at least one end part of the air inlet plate is also in sliding connection with the corresponding connecting position.

Preferably, the lower extreme and the casing sliding connection of air inlet plate, the lower tip left and right sides of air inlet plate is provided with the traveller, the relevant position is provided with the guide holder in the casing, set up the guide way of longitudinal extension on the guide holder, the traveller passes the guide way and can slide and rotate from top to bottom relative to the guide way.

For avoiding the air current disorder and the pressure release, under the state that the air intake board was opened, the lower tip of air intake board and the upper end butt of second guide plate.

In order to better illuminate the cooking area, an illuminating device is arranged on the first flow guide plate.

For avoiding the oil smoke to pollute lighting device and control scheme etc. and further avoid the oil smoke to escape from the left and right sides, the kuppe still includes backplate and two side shields, and under keeping away from the cigarette board open mode, the backplate is kept away from the tip that keeps away from the cigarette board by first guide plate and is upwards extended to the upper end that keeps away from the cigarette board, and two side shields shutoff first guide plate and the regional left side opening and the right side opening of backplate formation respectively.

Compared with the prior art, the utility model has the advantages of: the upper end and the lower end of the air inlet are respectively provided with the two guide plates, so that the oil smoke is bounded by the air inlet to form an air inlet area with a large outer part and a small inner part, the oil smoke can be accelerated to enter, and the oil smoke suction and exhaust efficiency is improved; the air inlet plate can be opened together with the smoke baffle plate, so that the negative pressure is preposed, the smoke collecting range is expanded, and the oil smoke absorption effect is improved; by defining the degree of opening of the air inlet plate, good air performance at the housing outlet is ensured.

Drawings

Fig. 1 is a schematic view of an open state of a range hood according to an embodiment of the present invention;

fig. 2 is a sectional view of the opened state of the range hood according to the embodiment of the present invention;

FIG. 3 is an enlarged view of a portion I of FIG. 2;

fig. 4 is a sectional view (the section is parallel to fig. 2) of the open state of the range hood according to the embodiment of the present invention;

fig. 5 is a schematic view of an air inlet plate of the range hood according to the embodiment of the present invention;

fig. 6 is a schematic view of a deflector of the range hood according to the embodiment of the present invention;

fig. 7 is a schematic view of a closed state of the range hood according to the embodiment of the present invention;

fig. 8 is a sectional view of the range hood according to the embodiment of the present invention in a closed state.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar functions.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and to simplify the description, rather than to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, since the disclosed embodiments of the invention may be arranged in different orientations, these directional terms are for illustrative purposes only and should not be considered limiting, as "upper", "lower", and the like are not necessarily limited to directions opposite to or coincident with the direction of gravity. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Referring to fig. 1, 2 and 4, a range hood includes a housing 1, a fan frame 2 disposed above the housing 1, and a fan system (not shown) disposed in the fan frame 2. The range hood of the embodiment is ultra-thin, and the thickness (the size in the front-back direction) of the housing 1 is less than or equal to 150mm. Referring to fig. 7, the range hood is thin as a whole, simple and large in appearance and small in occupied kitchen space in a closed state.

The front side of the casing 1 is inclined backward gradually from top to bottom, that is, the thickness of the casing 1 in the front-back direction is reduced gradually from top to bottom, the air inlet 11 is opened at the upper part of the front side of the casing 1, the smoke baffle 3 is arranged at the position corresponding to the air inlet 11 on the casing 1, and the smoke baffle can be turned over relative to the casing 1, so as to open or close the air inlet 11. The smoke barrier 3 is rotatable about a fixed axis, and is rotatably connected to the housing 1 at an upper end portion thereof with its axis of rotation extending in the left-right direction. The bottom of the shell 1 is provided with an oil cup 4 for receiving oil stains flowing down from the fan frame 2, the shell 1, the smoke baffle 3 and the like.

Because the whole machine is ultra-thin, the smoke gathering range of the whole machine is small. In order to solve the problem, the range hood further comprises a flow guide cover 5 arranged on one side of the smoke baffle 3 facing the inside of the shell 1, and the flow guide cover 5 moves along with the smoke baffle 3. The pod 5 includes a first baffle 51, a backplate 52, and two side baffles 53. Under the state that the smoke baffle 3 is opened, the first guide plate 51 extends towards the inside of the shell 1 from the lower end part of the smoke baffle 3, the rear baffle plate 52 extends upwards to the upper end part of the smoke baffle 3 from the end part of the first guide plate 51 far away from the smoke baffle 3, and the two side baffle plates 53 respectively block the left opening and the right opening of the area formed by the first guide plate 51 and the rear baffle plate 52. The first guide plate 51 can be further provided with an illuminating device 6, so that when the smoke baffle plate 3 is opened, the light emitting direction of the smoke baffle plate is downward, and the cooking area is conveniently illuminated.

Through setting up first guide plate 51, can make the negative pressure zone put down for the negative pressure zone is closer to the smoke source, thereby promotes the oil absorption cigarette effect.

The range hood further comprises a second guide plate 7, the lower end portion of which is fixed at a position, below the lower edge of the air inlet 11, on the inner side of the housing 1 and extends obliquely from bottom to top gradually towards the direction in the housing 1. When the smoke barrier 3 is opened, the included angle α between the second guide plate 7 and the first guide plate 51 is an acute angle, so that an air inlet area with a large outside and a small inside is formed, and the air speed at the air inlet 11 can be increased and the oil smoke exhaust efficiency can be improved as compared with the case 1 at the inside and the outside.

The lower end of the second baffle 7 is formed with a folded edge 71, see fig. 6, for fixing with the housing 1, the folded edge 71 is preferably L-shaped, and the folded edge 71 is opened with a first oil leakage hole 711, so that the oil dirt flowing down from the front side of the housing 1 can be collected downward into the oil cup 4 by the second baffle 7.

Referring to fig. 1, 2, 4 and 5, the range hood further includes an air inlet plate 8, which is disposed corresponding to the air inlet 11. The upper end of the air inlet plate 8 is connected to the air guide sleeve 5, preferably at the connection position of the air guide plate 51 and the rear baffle plate 52, and the lower end of the air inlet plate 8 is connected to the inside of the shell 1. The opening 81 that supplies the oil smoke to pass through is seted up on the air inlet plate 8, and the opening 81 is the shape that the left and right sides is little, the centre is big, can strengthen the wind speed of both sides from this, promotes the regional oil absorption cigarette effect in the outside, avoids range hood left and right sides edge to run the cigarette. In the present embodiment, the shape in which the left and right sides are small and the middle is large is formed by making the upper edge of the opening 81 gradually incline upward from the left and right sides toward the middle.

The air inlet plate 8 can move along with the smoke baffle 3, so that when the smoke baffle 3 is opened, the air inlet plate 8 at least penetrates through the air inlet 11 at the upper end part and extends out of the shell 1 to be opened, the effect of leading negative pressure is realized, the smoke collecting area is enlarged, the oil smoke absorption effect is further improved, and the lower end part of the air inlet plate 8 is abutted to the second guide plate 7. Under the state that air inlet plate 8 is opened, the distance between the upper end of casing 1 and the rear side of casing is D1, the thickness of the outlet of the upper end of casing 1 is D2 (front-back distance), D2 is also the thickness of the inlet of the lower end of blower frame 2, and the performance of oil smoke entering blower frame 2 from casing 1 will be affected if D1 is too small, so in this embodiment, D1/D2 is not less than 0.9, and good air performance indexes (air volume and noise) are obtained.

The air inlet plate 8 faces one side in the housing 1, a flange 82 is further formed at the edge of the opening 81, and the flange 82 can play a role in guiding flow and guide oil smoke entering from the opening 81 upwards. The lower end of the air inlet plate 8 is provided with a second oil leakage hole 83, so that oil stains (which drip from the fan frame 2 or accumulate when oil smoke passes through) on one side of the air inlet plate 8 facing the inside of the housing 1 can be collected to the lower end of the air inlet plate 8 under the guidance of the flange 82, and are collected downwards into the oil cup 4 through the second oil leakage hole 83. And the oil stain on the side of the air inlet plate 8 facing the outside of the housing 1 (which is dropped by the fan frame 2, flows down by the air guide cover 5 or is accumulated when oil smoke passes through) passes through the second oil leakage hole 83 downwards along the surface of the air inlet plate 8 or can be collected into the oil cup 4 downwards by the second air guide plate 7 in an open state. The lower end of the air inlet plate 8 is held within the housing 1.

For making air inlet plate 8 can be along with the motion of keeping off cigarette board 3, simultaneously not breaking away from with casing 1 again, the junction of air inlet plate 8 and keeping off cigarette board 3, perhaps the junction of air inlet plate 8 and casing 1 not only is for rotating to connect also sliding connection simultaneously for air inlet plate 8 rotates for non-dead axle, in order to avoid the limited unable motion in air inlet plate 8 both ends. In this embodiment, referring to fig. 2 and 3, the left and right sides of the lower end of the air inlet plate 8 are provided with the sliding columns 9, the corresponding positions in the casing 1 are provided with the guide bases 10, the guide bases 10 are provided with the guide grooves 101 extending in the longitudinal direction, and the sliding columns 9 pass through the guide grooves 101 and can slide and rotate up and down (the rotation axis extends in the left and right directions) relative to the guide grooves 101.

Therefore, when the smoke baffle 3 is opened, the air inlet plate 8 is turned over along with the smoke baffle 3 and rotates towards the direction outside the shell 1, and after the smoke baffle 3 is opened in place, the lower end part of the air inlet plate 8 is abutted against the upper end part of the second guide plate 7, referring to fig. 7 and 8, oil smoke only enters the shell 1 from the opening 81 on the air inlet plate 8, and the first guide plate 51 and the second guide plate 7 can guide and accelerate the suction of the oil smoke. When the smoke baffle 3 is closed, the air inlet plate 8 rotates along with the smoke baffle 3 towards the inner direction of the shell 1, after the smoke baffle 3 is closed in place, the air guide sleeve 5 is stored in the shell 1, and the lower end part of the air inlet plate 8 leaves the second air guide plate 7. In the above process, the spool 9 slides along the guide groove 101 and relatively rotates.

Claims (12)

1. The utility model provides a range hood, includes casing (1), air intake (11) have been seted up on the front side upper portion of casing (1), be provided with on casing (1) and open and close cigarette board (3), its characterized in that of air intake (11) with overturning:

a flow guide cover (5) is arranged on one side, facing the inside of the shell (1), of the smoke baffle plate (3), the flow guide cover (5) comprises a first flow guide plate (51), and the first flow guide plate (51) extends towards the inside of the shell (1) from the lower end part of the smoke baffle plate (3) in an opening state of the smoke baffle plate (3);

the range hood further comprises a second guide plate (7), the lower end part of the second guide plate (7) is fixed at the position, located below the lower edge of the air inlet (11), of the inner side of the shell (1), the second guide plate (7) extends towards the inner side of the shell (1) from bottom to top gradually in an inclined mode, and under the opening state of the smoke baffle plate (3), an included angle alpha between the second guide plate (7) and the first guide plate (51) is an acute angle.

2. The range hood of claim 1, wherein: a folded edge (71) fixed with the shell (1) is formed at the lower end part of the second guide plate (7), and a first oil leakage hole (711) is formed in the folded edge (71).

3. The range hood of claim 1 or 2, wherein: the range hood further comprises an air inlet plate (8) arranged corresponding to the air inlet (11), an opening (81) for oil smoke to pass through is formed in the air inlet plate (8), the air inlet plate (8) can extend out of the air inlet (11) to be opened at least at the upper end part along with the opening of the smoke baffle plate (3), and the lower end part of the air inlet plate (8) is kept in the shell (1).

4. The range hood of claim 3, wherein: the front side of the shell (1) is gradually inclined backwards from top to bottom, the distance between the upper end of the air inlet plate (8) and the rear side of the shell (1) is D1 in the state that the air inlet plate (8) is opened, the thickness of an outlet at the upper end of the shell (1) is D2, and D1/D2 is more than or equal to 0.9.

5. The range hood of claim 3, wherein: the opening (81) is in a shape with small left and right sides and a large middle part.

6. The range hood of claim 3, wherein: the air inlet plate (8) further comprises a flange (82) formed on one side facing the inside of the shell (1), and the flange (82) is located at the edge of the opening (81).

7. The range hood of claim 6, wherein: and a second oil leakage hole (83) is formed in the lower end part of the air inlet plate (8).

8. A range hood as claimed in claim 3, wherein: the upper end of the air inlet plate (8) is rotatably connected with the air guide sleeve (5), the lower end of the air inlet plate (8) is rotatably connected in the shell (1), and at least one end of the air inlet plate (8) is also in sliding connection with the corresponding connecting position.

9. The range hood of claim 8, wherein: the air inlet plate is characterized in that sliding columns (9) are arranged on the left side and the right side of the lower end portion of the air inlet plate (8), guide seats (10) are arranged in corresponding positions in the shell (1), guide grooves (101) extending longitudinally are formed in the guide seats (10), and the sliding columns (9) penetrate through the guide grooves (101) and can slide and rotate up and down relative to the guide grooves (101).

10. The range hood of claim 3, wherein: and under the state that the air inlet plate (8) is opened, the lower end part of the air inlet plate (8) is abutted against the upper end part of the second guide plate (7).

11. The range hood of claim 1 or 2, wherein: the first guide plate (51) is also provided with a lighting device (6).

12. The range hood of claim 11, wherein: the air guide sleeve (5) further comprises a rear baffle (52) and two side baffles (53), under the opening state of the smoke baffle (3), the rear baffle (52) upwards extends to the upper end part of the smoke baffle (3) from the end part, far away from the smoke baffle (3), of the first guide plate (51), and the two side baffles (53) respectively block the left side opening and the right side opening of the area formed by the first guide plate (51) and the rear baffle (52).

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