CN205897284U - Range hood - Google Patents

Abstract

The utility model discloses a range hood, establish the box of fan, its characterized in that in including: be provided with whole flow net in the box horizontally, the mesh has been seted up on the whole flow net, whole flow net has concave -convex structure. Through set up three -dimensional whole flow net in the runner, can cut apart the air current that enters into the fan, eliminate great swirl among the cooking fume air current to reach the purpose that reduces the noise, better adaptation cooking fume air current's flow field in addition, it is bigger to make cooking fume air current lead to out of date area of contact, air current, sound wave through the time consume the energy through the friction, obtain better rectification effect from this.

Description

A kind of range hood

Technical field

This utility model is related to kitchen appliance, especially a kind of range hood.

Background technology

Range hood has become one of indispensable machine for kitchen use equipment in Modern Family, and usual range hood includes pushing up Suction and side-suction type, and the range hood of top suction type due to neatly light and handy, take up room little the advantages of, and have more and more extensive Application.Top-sucking kitchen ventilator generally includes exhaust fume collecting hood, the blower housing being located on exhaust fume collecting hood, is provided with snail in blower housing Shell, impeller and the motor driving impeller.

The range hood of conventional top suction type, a kind of suction as disclosed in the Chinese patent of Application No. 201410704669.9 Lampblack absorber, including the exhaust fume collecting hood with inlet scoop, is arranged on the wind cabinet on exhaust fume collecting hood top, is arranged on the wind with spiral case in wind cabinet Machine, by the effect of blower fan, forms negative pressure while the gas in wind cabinet is discharged thus outside oil smoke is sucked cabinet wind cabinet Interior, realize the purpose of fume-exhausting.

Increasingly focus on quality of life with people, the noise problem of range hood is increasingly taken seriously.Noise Size be to evaluate an important indicator of range hood quality, and noise and air quantity are two conflicting technical specifications, both Air quantity to be kept, controls noise to be a very big technical barrier again.

The noise source of lampblack absorber is substantially from the rotational noise of draught fan impeller and two parts of turbulence noise.Drop at present The noise of low range hood mainly or by the way of passive noise reduction, by aerodynamic mode to centrifugal blower, snail Shell is optimized, but this smoke evacuation air quantity often leading to range hood reduces, and noise reduction is not fairly obvious.As changing Enter, also have by the way of active noise reduction in prior art.Turbulence noise due to range hood directly results from centrifugal blower, It is mainly derived from the air intake at air inlet of centrifugal fan, if the oil smoke flow in the oil smoke passage before air inlet of centrifugal fan Dynamic disorderly and unsystematic, then can increase the condition of turbulent flow generation, thus lead to the noise of range hood larger.

Utility model content

Technical problem to be solved in the utility model is the problem existing for above-mentioned prior art, provides a kind of effective Reduce the range hood of noise.

This utility model solves the technical scheme that adopted of above-mentioned technical problem: a kind of range hood, including in set wind The casing of machine it is characterised in that: be flatly provided with screens in described casing, described screens offer mesh, described Screens has concaveconvex structure.

According to one side of the present utility model, the concaveconvex structure of described screens is at least in concave up recessed in middle part Portion.

According to other side of the present utility model, the concaveconvex structure of described screens be have on left and right direction many The individual wavy shaped configuration being arranged in juxtaposition.

According to other side of the present utility model, each wavy shaped configuration of described screens includes concave up fovea superior Portion and to recessed lower concave part, the front side width of described upper recess is less than back side width, and the front side width of described lower concave part is more than Back side width.

Preferably, for reducing oil smoke air turbulence, obtain more preferable rectification effect, the front side of described upper recess is to rear side width Degree is gradually increased, and the rear side forward side width of described lower concave part is gradually increased.

Preferably, described mesh is square hole, strip hole, circular hole, diamond hole, slotted eye or regular polygon hole.

Preferably, in order to preferably eliminate whirlpool, the fluid entering blower fan is preferably split, to greatest extent simultaneously Reduce the windage that screens itself produces, the percent opening of described screens is 30%～85%.

Preferably, in order to better adapt to the soot gas flow field in casing, described mesh is in be non-uniformly distributed, described At least one region is had on screens, in this region, the density of described mesh is more than the density of this area peripheral edge.

Further, being connected for ease of screens and casing, the left and right sides of described screens has flange.

Compared with prior art, the utility model has the advantage of: by arrange in runner solid screens, permissible The air-flow entering into blower fan is split, to eliminate larger whirlpool in oil smoke air-flow, thus reducing the purpose of noise, And preferably adapt to the flow field of oil smoke air-flow so that the out-of-date contact area of cooking fume circulation is bigger, when air-flow, sound wave pass through Energy is consumed by friction, thus obtains more preferable rectification effect；Further, since stereochemical structure increased the contact of same oil smoke Area, can also be lifted to the purification efficiency entering blower fan oil smoke；By making the mesh non-uniform Distribution of screens, come more preferably Ground adapts to oil smoke flow field, improves noise reduction efficacy；By arranging certain percent opening so that carrying out to the fluid entering blower fan Preferably split, reduce the windage that screens itself produces simultaneously to greatest extent.

Brief description

Fig. 1 is the schematic diagram of range hood of the present utility model；

Fig. 2 is the schematic diagram of first embodiment of screens of range hood of the present utility model；

Fig. 3 is the schematic diagram of second embodiment of screens of range hood of the present utility model；

Fig. 4 is the schematic diagram of the 3rd embodiment of screens of range hood of the present utility model；

Fig. 5 is the schematic diagram of the 4th embodiment of screens of range hood of the present utility model.

Specific embodiment

Below in conjunction with accompanying drawing embodiment, this utility model is described in further detail.

Embodiment one

Referring to Fig. 1, a kind of range hood, including exhaust fume collecting hood 1, the casing 2 that is arranged on exhaust fume collecting hood 1 top, setting in casing 2 There is blower fan 3.Air inlet is offered on exhaust fume collecting hood 1, thus, oil smoke can be aspirated through air inlet and enter into by the blower fan 3 in casing 2 It is discharged into common flue after casing 2.

It is provided with screens 4, screens 4 is arranged horizontally in casing 2, and screens 4 offers mesh in casing 2 41, by arranging screens 4, the air-flow air intake entering into blower fan 3 can be split, to eliminate larger whirlpool in air-flow, from And reduce the purpose of noise.In the present embodiment, screens is not plane, but has the stereochemical structure of concaveconvex structure, Thus preferably adapting to the flow field of oil smoke air-flow, make that the out-of-date contact area of cooking fume circulation is bigger, air-flow, sound wave lead to simultaneously Out-of-date by friction consume energy, thus obtain more preferable rectification effect；Additionally, screens 4 was also equipped with oil in filtering fume The function of fat granule, because stereochemical structure increased the contact area of same oil smoke, can also be lifted to the cooking fume entering blower fan 3 The purification efficiency of stream.

Referring to Fig. 2, mesh 41 is circle, is evenly distributed on screens 4 it is preferred that percent opening is 30%～85%. At least in the concave up recess in middle part 42, recess 42 can be square, circular, inverted trapezoidal etc. to screens 4.

The left and right sides of screens 4 has flange 43, thus can be used for casing 2 inside be connected.In this enforcement In example, the edge of screens 4 bends downwards and forms above-mentioned flange 43.

Embodiment two

Difference with above-described embodiment one is, in the present embodiment, concaveconvex structure is screens 4 ' on left and right direction There are multiple wavy shaped configuration 44 ' being arranged in juxtaposition.

Embodiment three

Difference with above-described embodiment two is, in the present embodiment, mesh 41 ' is strip hole, and strip hole is in right and left Upwardly extend, to reduce windage.

Example IV

Difference with above-described embodiment three is, in the present embodiment, screens 4 " each wavy shaped configuration 44 " include Concave up upper recess 441 " and to recessed lower concave part 442 ", wherein, upper recess 441 " front side width (width is right and left Width upwards) be less than back side width, can lateral back side width be gradually increased, and lower concave part 442 in the past " front side width be more than Back side width, can lateral back side width be gradually reduced in the past.The overall width of each wavy shaped configuration 44 " then can be roughly equal. Thus, the structure of this screens 4 " can better adapt to uneven whirlpool produced by oil smoke air-flow.

Alternatively, mesh can also be diamond hole, slotted eye, regular polygon hole etc..Mesh can also be in screens 4th, 4 ', 4 " upper is in non-uniform Distribution, and this is because, in casing 2, the raw whirlpool of cooking fume miscarriage is uneven, for whirlpool relatively For the part concentrated, screens 4,4 ', 4 " on there is at least one region, in this region, mesh 41,41 ', 41 " density More than the density of this area peripheral edge, thus can better adapt to oil smoke flow field, improve noise reduction efficacy.

Claims (9)

1. a kind of range hood, including in set blower fan (3) casing (2) it is characterised in that: flatly set in described casing (2) It is equipped with screens (4；4’；4 "), described screens (4；4’；4 " offer mesh (41 on)；41 '), described screens (4；4’； 4 ") there is concaveconvex structure.

2. range hood as claimed in claim 1 it is characterised in that: the concaveconvex structure of described screens (4) be at least in The concave up recess in portion (42).

3. range hood as claimed in claim 1 it is characterised in that: described screens (4 '；4 " concaveconvex structure) be left, Multiple wavy shaped configuration (44 ' being arranged in juxtaposition are had on right direction；44”).

4. range hood as claimed in claim 3 it is characterised in that: each wavy shaped configuration of described screens (4 ") (44 ") include concave up upper recess (441 ") and to recessed lower concave part (442 "), the front side width of described upper recess (441 ") Degree is less than back side width, and the front side width of described lower concave part (442 ") is more than back side width.

5. range hood as claimed in claim 4 it is characterised in that: the front side of described upper recess (441 ") to back side width by Cumulative big, the rear side forward side width of described lower concave part (442 ") is gradually increased.

6. the range hood as any one of Claims 1 to 5 it is characterised in that: described mesh (41；41 ') be square hole, Strip hole, circular hole, diamond hole, slotted eye or regular polygon hole.

7. the range hood as any one of Claims 1 to 5 it is characterised in that: described screens (4；4’；Opening 4 ") Porosity is 30%～85%.

8. the range hood as any one of Claims 1 to 5 it is characterised in that: described mesh (41；41 ') it is in non-equal It is distributed, described screens (4 evenly；4’；4 " there is on) at least one region, in this region, described mesh (41；41 ') Density is more than the density of this area peripheral edge.

9. the range hood as any one of Claims 1 to 5 it is characterised in that: described screens (4；4’；4 " left side) Right both sides have flange (43).