CN217004614U - Fume exhaust fan - Google Patents

Abstract

The utility model discloses a range hood, which comprises a box body and a fan system, wherein the bottom of the box body is provided with a main air inlet, the left side wall of the box body is provided with a first auxiliary air inlet, the right side wall of the box body is provided with a second auxiliary air inlet, and the box body is hollow to form a smoke collection cavity; the range hood also comprises a first smoke baffle and a second smoke baffle positioned on the right side of the first smoke baffle, wherein when the first smoke baffle is positioned at a first position, the first auxiliary air inlet is closed, and when the second smoke baffle is positioned at the first position, the second auxiliary air inlet is closed; when the first smoke baffle and the second smoke baffle are at respective first positions at the same time, the smoke collection cavity is sealed by the parts of the two smoke baffles in the smoke collection cavity; when the first smoke baffle is at the second position, at least part of the first smoke baffle moves leftwards to exceed the left side of the box body, the smoke collection cavity and the first auxiliary air inlet are opened, and when the second smoke baffle is at the second position, at least part of the first smoke baffle moves rightwards to exceed the right side of the box body, the smoke collection cavity and the second auxiliary air inlet are opened.

Description

Fume exhaust fan

Technical Field

The utility model relates to an oil fume purification device, in particular to 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, accelerated by the fan and then collected and guided by the volute to be discharged out of a room.

The range hood can be mainly divided into a top-suction range hood and a side-suction range hood according to different shapes. The air inlet position of the top-suction type range hood is basically flush with the cabinet and is positioned in the middle of the fume collecting hood, and the air inlet form is net suction and circular suction; the side-draft range hood has various air inlet positions and air inlet forms, wherein the air inlet positions are arranged at the upper part, the middle part and the lower part of the front side, and the air inlet forms are direct-draft and circular-draft.

In general, the ceiling-mounted range hood uses the oil smoke to rise to the vicinity of the air inlet, and combines the smoke collecting function of the smoke collecting cover to suck the oil smoke away. The smoke inlet of the side-suction type range hood is closer to the source of the oil smoke, so that the side-suction type range hood can lock the generated oil smoke in the first time, compared with the top-suction type range hood, the effect of the smoke exhaust is more ideal, the oil smoke can be better guided into the shell of the range hood, and the effect is better.

At present, a top suction air inlet of a top suction type range hood is far away from a smoke source, a negative pressure area covers a cooking area, and the oil smoke escapes due to interference in the rising process; the smoke inlet of the side-draft range hood is closer to the source of oil smoke, the gathered smoke is sucked quickly, but the cross section of the whole range hood is triangular, so that cooking interference is easily caused, and the cooking experience is reduced.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to provide a range hood aiming at the defects of the prior art, so that a negative pressure area and an air inlet area are enlarged, and the oil smoke escape is reduced.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the utility model provides a range hood, includes box and fan system, its characterized in that: the bottom of the box body is provided with a main air inlet, the left side wall of the box body is provided with a first auxiliary air inlet, the right side wall of the box body is provided with a second auxiliary air inlet, the box body is hollow to form a smoke collection cavity, the main air inlet, the two auxiliary air inlets, the smoke collection cavity and a fan system are in fluid communication, and the fan system is positioned at the downstream of the two auxiliary air inlets on an oil smoke flow path;

the range hood also comprises a first smoke baffle and a second smoke baffle positioned on the right side of the first smoke baffle, and the first smoke baffle and the second smoke baffle are respectively positioned at a first position and a second position in a left-right moving manner;

when the first smoke baffle is located at the first position of the first smoke baffle, the first smoke baffle closes the first auxiliary air inlet, and when the second smoke baffle is located at the first position of the second smoke baffle, the second smoke baffle closes the second auxiliary air inlet; when the first smoke baffle and the second smoke baffle are positioned at respective first positions at the same time, the smoke collection cavity is sealed by the parts of the first smoke baffle and the second smoke baffle, which are positioned in the smoke collection cavity;

when the first smoke baffle is located at the second position of the first smoke baffle, at least part of the first smoke baffle moves leftwards to exceed the left side of the box body, the smoke collection cavity and the first auxiliary air inlet are opened, when the second smoke baffle is located at the second position of the second smoke baffle, at least part of the second smoke baffle moves rightwards to exceed the right side of the box body, and the smoke collection cavity and the second auxiliary air inlet are opened.

Preferably, in order to facilitate the smoke baffles to close and open the smoke collecting cavity and the auxiliary air inlet simultaneously, the first smoke baffle comprises a first plate body extending transversely and a second plate body extending downwards from the left end of the first plate body, and the second smoke baffle comprises a third plate body extending transversely and a fourth plate body extending downwards from the right end of the third plate body;

when the first smoke baffle is located at the first position of the first smoke baffle, the second plate body closes the first auxiliary air inlet, and when the second smoke baffle is located at the first position of the second smoke baffle, the fourth plate body closes the second auxiliary air inlet; when the first smoke baffle and the second smoke baffle are located at respective first positions at the same time, the first plate body and the third plate body are located in the smoke collection cavity and attached to each other, so that the smoke collection cavity is closed;

when the first smoke baffle is located at the second position of the first smoke baffle, the first plate body penetrates through the first auxiliary air inlet, and when the second smoke baffle is located at the second position of the second smoke baffle, the third plate body penetrates through the second auxiliary air inlet.

Preferably, in order to facilitate the guiding of the corresponding auxiliary air inlet of the oil smoke outer side, the first smoke baffle further comprises a first guide plate, the second smoke baffle further comprises a second guide plate, the first guide plate extends downwards to the second plate body from the position of the first plate body close to the right end part to the left, and the second guide plate extends downwards to the fourth plate body from the position of the third plate body close to the left end part to the right.

Preferably, in order to effectively ensure that the left negative pressure area and the right negative pressure area cover the oil smoke rising area, when the first smoke baffle plate and the second smoke baffle plate are simultaneously positioned at respective second positions, the distance between the left end part of the first smoke baffle plate and the right end part of the second smoke baffle plate ranges from 700 mm to 900 mm.

Preferably, for the problem of avoiding user and range hood collision during the culinary art, promote the culinary art and experience, the value range of the ascending degree of depth of box fore-and-aft direction is at 320 ~ 350 mm.

Preferably, in order to reduce the negative pressure area and improve the oil fume suction effect, the value range of the installation height of the box body is 450-600 mm.

Furthermore, in order to improve the appearance delicacy of the whole machine and improve the cleaning experience, a back plate is arranged on the rear side of the box body, and the back plate extends downwards to exceed the bottom of the box body.

According to one aspect of the utility model, in order to filter oil smoke conveniently, a first filter screen is arranged between the main air inlet and the fan system on the oil smoke flow path, the first filter screen is a grid screen, and grid mesh holes of the first filter screen extend from the middle to the left and right sides.

In order to guide the oil stains on the first filter screen to the left side, the right side and the rear side and facilitate collection, the first filter screen is in a shape which is gradually inclined from the middle to the left side and the right side and extends downwards, and the first filter screen is integrally inclined downwards gradually from front to back.

According to another aspect of the utility model, in order to filter oil smoke conveniently, a second filter screen is arranged at the main air inlet.

Compared with the prior art, the utility model has the advantages that: the smoke baffle plates which are horizontally moved from left to right are arranged, so that the main air inlet and the auxiliary air inlet can be closed when the range hood is in a non-working state, the main air inlet and the auxiliary air inlet are opened when the range hood is in a working state, the auxiliary air inlet is additionally arranged outside the main air inlet, the air inlet area is enlarged, and meanwhile, the negative pressure area is enlarged towards the left side and the right side, so that a larger negative pressure area is formed to improve the oil smoke absorption effect; by reducing the depth of the box body, the problem of user collision during cooking is effectively solved, and the cooking experience of a user is improved; by reducing the installation height of the box body, the negative pressure area is reduced, and the oil fume suction effect is improved.

Drawings

Fig. 1 is a schematic view of a range hood in a closed state according to a first embodiment of the present invention;

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

fig. 3 is a schematic view of the range hood according to the first embodiment of the present invention in an open state;

fig. 4 is a sectional view of the open state of the range hood according to the first embodiment of the present invention;

fig. 5 is a schematic view of a range hood according to a second embodiment of the present invention in an open state;

fig. 6 is a sectional view (left-right sectional view) of a range hood according to a second embodiment of the present invention in an open state;

fig. 7 is a sectional view (front-rear section) of a range hood according to a second embodiment of the present invention in an open state;

fig. 8 is a schematic view of a first filter screen of a range hood according to a second embodiment of the present invention.

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 "central," "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 are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and to simplify the description, but are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and that the directional terms are used for purposes of illustration and are not to be construed as limiting, for example, because the disclosed embodiments of the present invention may be oriented in different directions, "lower" is not necessarily limited to a direction 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.

Example one

Referring to fig. 1, 2 and 4, a range hood is a ceiling range hood, and includes a box 1, a fan frame 2 and a fan system 3 disposed in the fan frame 2, the fan frame 2 is disposed above the box 1, and the fan system 3 is disposed above the box 1. The fan system 3 may be a conventional centrifugal fan. The housing 1 and the fan frame 2 may be integrated.

The box body 1 is of a hollow structure, a first main air inlet 11 and a second main air inlet 12 are formed in the bottom of the box body 1, and the two main air inlets are arranged at left and right intervals and can be communicated with each other to form a main air inlet. The box 1 has formed the cigarette collecting cavity 13 inside, can hold together the cigarette. The top of the box body 1 is open and connected with the fan frame 2, and the main air inlets, the smoke collection cavity 13 and the fan system 3 are in fluid communication, so that oil smoke below the box body 1 can enter the fan frame 2 after being sucked from the two main air inlets and is finally discharged out of the oil smoke suction machine by the fan system 3.

The depth range of the box body 1 in the front-back direction is 320-350 mm, so that the problem that a user collides with a common fume collecting hood of a top suction type range hood during cooking can be effectively solved, and the cooking experience is improved. In addition, the installation height of the common top-suction range hood is 650-750 mm, while the height of two main air inlets of the box body 1 of the top-suction range hood can be 450-600 mm, on one hand, the height of the main air inlets below 600mm meets the requirement that a negative pressure area is close to a smoke source, so that the smoke suction effect is ensured, and on the other hand, the height of the main air inlets above 450mm meets the requirement that a cooking area without sight line blocking, so that the user experience is improved. The width of the box body 1 in the left-right direction can be 400-500 mm. On the oil smoke flow path, the fan system 3 is located downstream of the main air inlet and the auxiliary air inlet.

A first auxiliary air inlet 14 is formed in the left side wall of the box body 1, a second auxiliary air inlet 15 is formed in the right side wall of the box body 1, and each auxiliary air inlet preferably extends upwards from the bottom of the corresponding side of the box body 1. The range hood further comprises a first smoke baffle 41 and a second smoke baffle 42, the first smoke baffle 41 comprises a first plate 411 and a second plate 412 which are arranged at an angle, the second smoke baffle 42 comprises a third plate 421 and a fourth plate 422 which are arranged at an angle, and the two smoke baffles are preferably L-shaped. The first plate 411 and the third plate 421 extend laterally, preferably horizontally. The second plate 412 extends downward from the left end of the first plate 411, the fourth plate 422 extends downward from the right end of the third plate 421, and preferably, the second plate 412 and the fourth plate 422 both extend vertically and correspond to the extending directions of the two auxiliary air inlets. The two auxiliary air inlets are also in fluid communication with the smoke collecting cavity 13 and the fan system 3.

The first smoke baffle 41 corresponds to the first main air inlet 11 and the first auxiliary air inlet 14, and the second smoke baffle 42 corresponds to the second main air inlet 12 and the second auxiliary air inlet 15. When the range hood does not work, the first smoke baffle 41 and the second smoke baffle 42 are respectively located at respective first positions, the first plate 411 of the first smoke baffle 41 is located above the first main air inlet 11, the third plate 421 of the second smoke baffle 42 is located above the second main air inlet 12, the width of the two plates in the left-right direction can be larger than the width of the two main air inlets, the right end of the first plate 411 is attached to the left end of the third body 413, so that the smoke collection cavity 13 is sealed (the effect of the smoke collection cavity is equivalent to closing the main air inlets), and the space below the first plate 411 and the second plate 412 is isolated from the space above the smoke collection cavity. Here, the enclosed smoke collection chamber 13 means that two plates extending transversely block the cross section of the smoke collection chamber 13, thereby preventing fluid from passing through. The second plate 412 of the first smoke barrier 41 closes the first auxiliary air inlet 14, and the fourth plate 422 of the second smoke barrier 42 closes the second auxiliary air inlet 15. In the idle closed state, preferably, the first smoke barrier 41 does not exceed the left end of the box body 1, and the second smoke barrier 42 does not exceed the right end of the box body 1, so as to reduce the occupied space and maintain the appearance consistency of the whole machine.

The first smoke baffle 41 and the second smoke baffle 42 can also translate in the left-right direction, therefore, when the range hood works, the first smoke baffle 41 can translate left through the first auxiliary air inlet 14, the second smoke baffle 42 can translate right through the second auxiliary air inlet 15, and thus the first smoke baffle 41 and the second smoke baffle 42 are respectively located at respective second positions, at this time, the first plate 411 and the third plate 421 no longer seal the smoke collection chamber 13, the second plate 412 no longer closes the first auxiliary air inlet 14, the fourth plate 422 no longer closes the second auxiliary air inlet 15, and the oil smoke can enter from the first main air inlet 11, the second main air inlet 12, the first auxiliary air inlet 14, and the second auxiliary air inlet 15, then enter the fan frame 2 through the smoke collection chamber 13, and finally is discharged by the fan system 3, see fig. 3 and fig. 4. And the first smoke barrier 41 extends at least partially beyond the left side of the housing 1 and the second smoke barrier 42 extends at least partially beyond the right side of the housing 1. Therefore, the first smoke baffle 41 and the second smoke baffle 42 also expand negative pressure areas towards the left side and the right side, the formed larger negative pressure area can reduce the escape of oil smoke, meanwhile, the arrangement of the two auxiliary air inlets expands the air inlet area, and the oil smoke absorption effect is further improved. After the two smoke baffles are opened, the distance between the left end part of the first smoke baffle 41 and the right end part of the second smoke baffle 42 can be 700-900 mm, and the left negative pressure area and the right negative pressure area can be effectively ensured to cover the oil smoke rising area. And the second plate body 412 of the first smoke baffle 41 and the fourth plate body 422 of the second smoke baffle 42 can further play a role of gathering the smoke due to the downward extension.

When there is only one main air inlet, the first plate 411 of the first smoke baffle 41 corresponds to the left area of the main air inlet, and the third plate 421 of the second smoke baffle 42 corresponds to the right area of the main air inlet.

In the present embodiment, it is preferable that the first auxiliary air inlet 14 and the second auxiliary air inlet 15 are symmetrical, and the first smoke barrier 41 and the second smoke barrier 42 are symmetrical, where symmetrical refers to the same shape and size, and are symmetrically arranged with respect to the center line of the bottom of the box body 1 in the left-right direction.

The two smoke baffles may be linked so that the first smoke baffle 41 and the second smoke baffle 42 are in the respective first position or second position at the same time; or independently movable, so that the first smoke barrier 41 and the second smoke barrier 42 can be freely located at the respective first position or second position (e.g. the first smoke barrier 41 is at the first position and the second smoke barrier 42 is at the second position) at the same time, and the moving directions of the two smoke barriers are opposite when the two smoke barriers are linked. The motion mechanisms of the two smoke baffles can adopt the prior art, such as a linear driving module, such as the combination of a motor gear and a rack, the combination of a motor screw rod and a nut, an electric push rod and the like. And the stroke of the two smoke baffles can be adjusted according to the cooking state.

The rear side of box 1 can set up backplate 5, and backplate 5 downwardly extending surpasss the bottom of box 1 to the preferred manger plate that extends to on the top of a kitchen range (not shown, the manger plate is prior art), promote the integrative exquisite degree of lampblack absorber and cupboard on the one hand from this, on the other hand promotes the clean experience of user.

Example two

Referring to fig. 5 to 8 (hidden back plate in the figures), in the present embodiment, the difference from the first embodiment is that the first smoke barrier 41 'further includes a first flow guide 413, the second smoke barrier 42' further includes a second flow guide 423, and the first flow guide 413 extends from the position of the first plate 411 near the right end to the second plate 412 obliquely downward and leftward. The second baffle 423 extends from the position of the third plate 421 near the left end to the fourth plate 422 obliquely and downwardly to the right. Thus, the longitudinal cross-sections of the first smoke barrier 41 'and the second smoke barrier 42' resemble triangles. The front and rear ends of the first baffle 413 are respectively sealed with the corresponding front and rear ends of the first plate 411 and the second plate 412, and the front and rear ends of the second baffle 423 are respectively sealed with the corresponding front and rear ends of the third plate 421 and the fourth plate 422.

Therefore, when the first smoke baffle 41 'and the second smoke baffle 42' are respectively located at the second position, the first guide plate 413 and the second guide plate 423 can function to guide the outside of the oil smoke to the corresponding auxiliary air inlet.

On the oil smoke flow path, a first filter screen 6 is arranged between the two main air inlets and the fan system 3, and the first filter screen 6 is in a shape which gradually inclines and extends downwards from the middle to the left and right sides, so that the first filter screen corresponds to the two air inlets and can guide the oil smoke to enter the fan system 3 upwards in a centralized manner. Meanwhile, the first filter screen 6 is integrally inclined downwards gradually from front to back, so that the first filter screen 6 can guide the oil stains flowing downwards from the upper part to the back side and the left side and the right side. The angle of the first filter screen 6 gradually inclining downwards from front to back is D, the angle of the first filter screen 6 gradually inclining downwards from the middle to the left and right sides is E, and preferably, the angle is more than or equal to 10 degrees and less than or equal to 20 degrees, and the angle is more than or equal to 6 degrees and less than or equal to 15 degrees.

Preferably, the first screen 6 is a grill screen having grill openings 61 extending from the center to the left and right.

In addition, the first main air inlet 11 and the second main air inlet 12 are respectively provided with a second filter screen 16.

The first screen 6 and the second screen 16 can also be applied to the first embodiment.

The term "fluid communication" as used herein refers to a spatial relationship between two components or portions (hereinafter collectively referred to as a first portion and a second portion, respectively), i.e., a fluid (gas, liquid or a mixture of both) can flow from the first portion along a flow path or/and be transported to the second portion, and may be a direct communication between the first portion and the second portion, or an indirect communication between the first portion and the second portion via at least one third member, such as a fluid channel, e.g., a pipe, a channel, a conduit, a flow guide, a hole, a groove, or a chamber that allows a fluid to flow therethrough, or a combination thereof.

Claims (10)

1. The utility model provides a range hood, includes box (1) and fan system (3), its characterized in that: the oil fume exhaust fan is characterized in that a main air inlet is formed in the bottom of the box body (1), a first auxiliary air inlet (14) is formed in the left side wall of the box body (1), a second auxiliary air inlet (15) is formed in the right side wall of the box body (1), the box body (1) is hollow to form a fume collecting cavity (13), the main air inlet, the two auxiliary air inlets, the fume collecting cavity (13) and the fan system (3) are in fluid communication, and the fan system (3) is located at the downstream of the two auxiliary air inlets on an oil fume flow path;

the range hood also comprises a first smoke baffle plate (41; 41 ') and a second smoke baffle plate (42; 42 ') positioned on the right side of the first smoke baffle plate (41; 41 '), wherein the first smoke baffle plate (41; 41 ') and the second smoke baffle plate (42; 42 ') can be respectively positioned at a first position and a second position in a left-right movement manner;

when the first smoke baffle (41; 41 ') is in the first position of the first smoke baffle, the first smoke baffle (41; 41') closes the first auxiliary air inlet (14), and when the second smoke baffle (42; 42 ') is in the first position of the second smoke baffle, the second smoke baffle (42; 42') closes the second auxiliary air inlet (15); when the first smoke baffle (41; 41 ') and the second smoke baffle (42; 42') are at the same time at the respective first positions, the smoke collection cavity (13) is closed by the parts of the first smoke baffle (41; 41 ') and the second smoke baffle (42; 42') positioned in the smoke collection cavity (13);

when the first smoke baffle (41; 41 ') is in the second position, the first smoke baffle (41; 41') moves leftwards at least partially and exceeds the left side of the box body (1), the smoke collection cavity (13) and the first auxiliary air inlet (14) are opened, and when the second smoke baffle (42; 42 ') is in the second position, the second smoke baffle (42; 42') moves rightwards at least partially and exceeds the right side of the box body (1), and the smoke collection cavity (13) and the second auxiliary air inlet (15) are opened.

2. The range hood of claim 1, wherein: the first smoke baffle (41; 41 ') comprises a first plate body (411) extending transversely and a second plate body (412) extending downwards from the left end part of the first plate body (411), and the second smoke baffle (42; 42') comprises a third plate body (421) extending transversely and a fourth plate body (422) extending downwards from the right end part of the third plate body (421);

when the first smoke baffle (41; 41 ') is at the first position, the second plate body (412) closes the first auxiliary air inlet (14), and when the second smoke baffle (42; 42') is at the first position, the fourth plate body (422) closes the second auxiliary air inlet (15); when the first smoke baffle (41; 41 ') and the second smoke baffle (42; 42') are at the same time at the respective first positions, the first plate body (411) and the third plate body (421) are positioned in the smoke collection cavity (13) and are jointed, so that the smoke collection cavity (13) is closed;

when the first smoke baffle (41; 41 ') is in the second position, the first plate body (411) penetrates through the first auxiliary air inlet (14), and when the second smoke baffle (42; 42') is in the second position, the third plate body (421) penetrates through the second auxiliary air inlet (15).

3. The range hood of claim 2, wherein: the first smoke baffle (41 ') further comprises a first guide plate (413), the second smoke baffle (42') further comprises a second guide plate (423), the first guide plate (413) is inclined downwards to the second plate body (412) from the position, close to the right end, of the first plate body (411), and the second guide plate (423) is inclined downwards to the fourth plate body (422) from the position, close to the left end, of the third plate body (421).

4. The range hood according to any one of claims 1 to 3, wherein: when the first smoke baffle (41; 41 ') and the second smoke baffle (42; 41') are at the respective second positions at the same time, the distance between the left end of the first smoke baffle (41) and the right end of the second smoke baffle (42) ranges from 700 mm to 900 mm.

5. The range hood according to any one of claims 1 to 3, wherein: the depth of the box body (1) in the front-back direction ranges from 320 mm to 350 mm.

6. A range hood according to any one of claims 1 to 3, wherein: the value range of the installation height of the box body (1) is 450-600 mm.

7. A range hood according to any one of claims 1 to 3, wherein: the rear side of the box body (1) is provided with a back plate (5), and the back plate (5) extends downwards to exceed the bottom of the box body (1).

8. A range hood according to any one of claims 1 to 3, wherein: on the oil smoke flow path, be provided with first filter screen (6) between main air intake and fan system (3), first filter screen (6) are the grid net, grid mesh (61) of first filter screen (6) extend to the left and right sides by the centre.

9. The range hood of claim 8, wherein: the first filter screen (6) is in a shape which gradually inclines from the middle to the left side and the right side and extends downwards, and the first filter screen (6) is integrally and gradually inclined downwards from front to back.

10. A range hood according to any one of claims 1 to 3, wherein: and a second filter screen (16) is arranged at the main air inlet.

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