CN207179755U - Range hood - Google Patents

Abstract

The utility model discloses a kind of range hood, including exhaust fume collecting hood and cold plate, and the medial surface of the cold plate is convex provided with keeping off, and the range hood also includes the sound-absorbing member for being adhered to the cold plate medial surface, and the sound-absorbing member lee face convex with the gear is connected.The utility model range hood can be stably in a long term with working with low noise.

Description

Range hood

Technical field

Range hood field is the utility model is related to, more particularly to a kind of range hood.

Background technology

As the improvement of people's living standards, requirement more and more higher of the people to the smoking effect of range hood.It is existing Range hood, cold plate is provided with smoke collecting chamber, is planar structure on the inside of cold plate, exists between cold plate and blower fan larger Cavity, flue gas flow, surrounding of the air-flow along cold plate is done laminar flow and entered in the presence of cold plate to the surrounding of smoke collecting chamber When entering the cavity, because cold plate is relatively poor easily because generating period resonates, and cold plate typically in tabular, intensity Inner side sound reflection, echoing produces extra noise.

Utility model content

Main purpose of the present utility model is to propose a kind of range hood, it is intended to it is high to solve existing range hood noise Technical problem.

To achieve the above object, the utility model proposes range hood, including exhaust fume collecting hood and cold plate, the cold plate Medial surface be provided with and keep off convex, the range hood also includes being adhered to the sound-absorbing member of the cold plate medial surface, the sound-absorbing The part lee face convex with the gear is connected.

Preferably, the cold plate tilts down setting from front to back.

Preferably, the gear convex closure includes the front section positioned at the condensation front edge of board, and the front side of the front section, which is formed, to be used Face is drained so that greasy dirt is drained into left side and/or right side.

Preferably, the drainage face is in the step-like arc-shaped for extending downwardly or being bent downwardly extension.

Preferably, the front section tilts extension toward left and right directions separately down from middle part.

Preferably, the angular range that the front section with respect to the horizontal plane tilts down extension is [10 °, 15 °].

Preferably, the gear is convex also includes the rear gear section relative with the front section, and positioned at the front section and after Two side block sections between gear section, the front section, rear gear section and two side block sections are connected and enclose to form ring-type.

Preferably, the sound-absorbing member is sheet or convex closure shape, and the range hood also includes being located at the sound-absorbing part The protective cover of part periphery, offers multiple penetrable sound holes for being communicated to the sound-absorbing member on the protective cover.

Preferably, the convex projection from the cold plate of the gear is formed；The range hood is also described cold including being attached at The paster of solidifying plate lateral surface, the convex inner chamber of the paster covering gear are set.

Preferably, the convex altitude range of the gear is more than or equal to 5mm, and is less than or equal to 10mm.

Preferably, the convex windward side of the gear is obliquely installed relative to the cold plate, the windward side and the condensation Angular range between plate is more than 90 °, and less than or equal to 135 °.

Preferably, range hood also includes diffusion plate, and the diffusion plate has water conservancy diversion side and diffusion side, the water conservancy diversion Side is connected with the side of the cold plate, and the diffusion side is extended in the smoke collecting chamber of the exhaust fume collecting hood, the diffusion side There is airspace between the inwall of side and the smoke collecting chamber；And/or

Air vent is offered on the diffusion plate.

Preferably, the quantity of the air vent is multiple, and the area sums of multiple air vents is from the water conservancy diversion side Gradually increase to the diffusion side.

Preferably, the diffusion plate, cold plate and gear convex are wholely set.

The utility model range hood can effectively strengthen cold plate by adhering to sound-absorbing member in the inner side of cold plate Intensity, the generation of resonance is reduced, and then reduce noise；In addition, the intensity that convex setting is equally beneficial for being lifted cold plate is kept off, and And sound-absorbing member is connected with keeping off convex lee face, the presence that gear projection is put can avoid sound-absorbing member from directly mutually being met with oil smoke, oil Dirt can not infiltrate the tack coat between sound-absorbing member and cold plate, and then ensure that the reliability of adhesion so that range hood can With stably in a long term with working with low noise.

Brief description of the drawings

, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work Under, other accompanying drawings can also be obtained according to the structure shown in these accompanying drawings.

Fig. 1 is the structural representation of the embodiment of the utility model range hood one, and the panel of housing therein, which is in, to be opened Position；

Fig. 2 is the perspective cross section structural representation of the embodiment of the utility model range hood one；

Fig. 3 is the partial enlarged drawing at A in Fig. 2；

Fig. 4 is the positive cross-sectional view of the embodiment of the utility model range hood one；

Fig. 5 is the partial enlarged drawing at B in Fig. 4；

Fig. 6 is the lateral cross-sectional view of the embodiment of the utility model range hood one；

Fig. 7 is the partial enlarged drawing at C in Fig. 6；

Fig. 8 is the cold plate of the utility model range hood, keeps off the convex and embodiment schematic diagram of diffusion plate integrative-structure one；

Fig. 9 is the cold plate of the utility model range hood, keeps off convex and another embodiment schematic diagram of diffusion plate integrative-structure；

Figure 10 is the cold plate of the utility model range hood, gear is convex and diffusion plate integrative-structure another embodiment is illustrated Figure.

Drawing reference numeral explanation：

Label	Title	Label	Title	Label	Title
						100	Housing	320	Air inlet	430	After keep off section
110	Flue	330	Air intake passage	440	Side block section
						120	Smoking chamber	340	Side wall	500	Sound-absorbing member
130	Shell body	350	Roof	600	Check-valves
						140	Panel	400	Cold plate	700	Lubricating cup
200	Blower fan	410	Keep off convex	800	Paster
						210	Spiral case	411	Lee face	900	Diffusion plate
220	Impeller	412	Windward side	910	Water conservancy diversion side
						230	Motor	420	Front section	920	Diffusion side
300	Exhaust fume collecting hood	420'	Front section	930	Air vent
						310	Smoke collecting chamber	420”	Front section	101	Greasy dirt

Realization, functional characteristics and the advantage of the utility model purpose will be described further referring to the drawings in conjunction with the embodiments.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out Clearly and completely describing, it is clear that described embodiment is only part of the embodiment of the present utility model, rather than all Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making creative work premise Lower obtained every other embodiment, belong to the scope of the utility model protection.

If it is to be appreciated that related in the utility model embodiment directionality instruction (such as upper and lower, left and right, it is preceding, Afterwards ...), then directionality instruction be only used for explain it is relative between each part under a certain particular pose (as shown in drawings) Position relationship, motion conditions etc., if the particular pose changes, directionality instruction also correspondingly changes therewith.

If, should " first ", " the in addition, relate to the description of " first ", " second " etc. in the utility model embodiment Two " etc. description is only used for describing purpose, and it is not intended that instruction or implying its relative importance or implicit indicating meaning The quantity of the technical characteristic shown.Thus, " first " is defined, the feature of " second " can express or implicitly include at least one Individual this feature.In addition, the technical scheme between each embodiment can be combined with each other, but must be with ordinary skill Personnel can be implemented as basis, and this technical side is will be understood that when the combination appearance of technical scheme is conflicting or can not realize The combination of case is not present, also not within the protection domain of the requires of the utility model.

The utility model proposes a kind of range hood.

In the utility model embodiment, such as Fig. 1 to Fig. 3, and shown in Fig. 5, the range hood includes housing 100, wind Machine 200, exhaust fume collecting hood 300 and cold plate 400, housing 100 have been internally formed flue 110；Blower fan 200 is arranged on flue 110, flue 110 form smoking chamber 120 at the air inlet of blower fan 200；The medial surface of cold plate 400 is provided with gear convex 410, and range hood is also Sound-absorbing member 500 including being adhered to the medial surface of cold plate 400, sound-absorbing member 500 are connected with the lee face 411 of gear convex 410.

In the present embodiment, specifically, exhaust fume collecting hood 300 has the smoke collecting chamber 310 of indent and connects the air inlet of flue 110 320.Air intake passage 330 is formed between the edge of cold plate 400 and the wall of smoke collecting chamber 310.Housing 100 includes shell body 130 With the panel 140 being detachably connected with shell body 130, the connected mode of panel 140 and shell body 130 can have a lot, such as block Button is connected, is connected by screw.Blower fan 200 includes spiral case 210, impeller 220 and motor 230, and impeller 220 is arranged on spiral case Fixed in 210 and with the rotating shaft of motor 230.Range hood also includes check-valves 600, and the outlet of corresponding flue 110 is fixedly arranged on shell On body 100, to prevent air-flow from entering housing 100 from the outlet of flue 110.When motor 230 rotates, impeller 220 rotates, So that flue gas is entered inside housing 100 from the outside of range hood, and fume-exhausting is discharged to by blower fan 200, check-valves 600 Outside machine.

The entrance of the corresponding flue 110 of exhaust fume collecting hood 300 is fixedly connected with housing 100, exhaust fume collecting hood 300 with smoke collecting chamber 310 with And the air inlet 320 to connect with the entrance of flue 110, cold plate 400 correspond to the air inlet 320 in smoke collecting chamber 310.Cold plate 400 Shape can have a lot, such as circle, polygon, ellipse, be not particularly limited herein, by taking quadrangle as an example.

In the lubricating cup formed below 700 of the sidewall 34 0 of smoke collecting chamber 310, the oil stream of smoke collecting chamber 310 is condensate in lubricating cup 700 In.Exhaust fume collecting hood 300 has much with the mode that housing 100 is connected, and such as snaps connection, mode connects for screw etc..

Sound-absorbing member 500 can be acoustical cotton or other soft porous sound-absorbing materials.It is understood that sound-absorbing member 500 are typically invested by way of bonding on cold plate 400.Keeping off convex 410 can weld, and snap connection, and mode connects for screw etc. is cold On solidifying plate 400, as long as greasy dirt infiltration sound-absorbing member 500 can be obstructed.

The utility model range hood can effectively be strengthened cold by adhering to sound-absorbing member 500 in the inner side of cold plate 400 The intensity of solidifying plate 400, the generation of resonance is reduced, and then reduce noise；In addition, the setting of gear convex 410 be equally beneficial for being lifted it is cold The intensity of solidifying plate 400, and sound-absorbing member 500 is connected with the lee face 411 of gear convex 410, and the presence that gear convex 410 is set can be kept away Exempt from sound-absorbing member 500 directly mutually to meet with oil smoke, greasy dirt can not infiltrate the tack coat between sound-absorbing member 500 and cold plate 400, enter And it ensure that the reliability of adhesion so that range hood can be stably in a long term with working with low noise.

Further, Fig. 2 and Fig. 6 be refer in one embodiment, cold plate 400 tilts down setting from front to back, Such cold plate 400 can carry out preferably water conservancy diversion to the flue gas of rising, under the premise of anteroposterior dimension identical, also improve with The contact area of flue gas, the smoking areas that the surrounding smoking of cold plate 400 is formed is bigger, thus can reach preferably smoking effect Fruit.

Further, it is described gear convex 410 include positioned at the front end of cold plate 400 front section (420,420', 420 "), the front side of the front section (420,420', 420 ") is formed drains face greasy dirt is drained into left side and/or right side. Fig. 9 is refer to, front section 420' tilts extension toward left and right directions separately down from middle part.It refer to Figure 10, the drainage face In the step-like arc-shaped for extending downwardly or being bent downwardly extension, as front convex 420 " is illustrated, specifically, front section can be with In the tabular of step-like bending, that is, roll over shape plate, or the tabular of circular arc.In the present embodiment, front section (420', 420 ") Windward side 412 accumulate greasy dirt more swimmingly can be flowed to along front section (420', 420 ") in lubricating cup 700.Especially, Backboard in blower fan 200 close to the housing 100, and smoking chamber 120 is formed at the front side of blower fan 200, the air intake of front side leads to The flue gas flow in road 330 is maximum, if front section (420', 420 ") is horizontally disposed, then effect of the greasy dirt accumulated in flow of flue gas Front convex 410 is easily crossed down and stains sound-absorbing member 500, reduces the sound-absorbing effect of sound-absorbing member 500.Preferably, front section The angular range that 420' with respect to the horizontal plane tilts down extension is [10 °, 15 °].

Further, Fig. 8 and Fig. 9 is refer to, gear convex 410 also includes the rear gear section relative with front section (420,420') 430, and the two side block sections 440 between front section 420' and rear gear section 430, front section (420,420'), rear gear section 430 And two side block section 440 be connected and enclose to form ring-type.

In the present embodiment, it is however generally that, gear convex 410 to be arranged at air intake passage 330 corresponding, such as work as air intake passage 330 are only formed in the left and right sides and during front side, and gear convex 410 can also be only formed in the left and right ends and front end of cold plate 400. Furthermore if the center ofthe of blower fan 200 is set, when air intake passage 330 only forms the left and right sides, gear convex 410 can be accordingly to shape Into the left and right ends of cold plate 400.Circularize, be on the one hand advantageous to more complete but it is understood that convex 410 will be kept off and set Sound-absorbing member 500 is protected to face, is on the other hand also beneficial to further strengthen the intensity of cold plate 400, particularly works as condensation When plate 400 is formed with keeping off convex 410 using same plate stamping.

Further, sound-absorbing member 500 is sheet or convex closure shape, and range hood also includes being located at outside sound-absorbing member 500 The protective cover (not shown) enclosed, multiple penetrable sound holes for being communicated to sound-absorbing member 500 are offered on protective cover.

In the present embodiment, on the one hand protective cover can protect sound-absorbing member 500, such as reduce the impact of oil smoke air-flow, or Scratch in person's assembling process；On the other hand can be by the peptizaiton of sound wave, sound wave is again through penetrable sound hole by the sound-absorbing Material absorbs, and so widens the acoustically effective of sound-absorbing parts, that is, reduces noise.

Further, Fig. 3 to Fig. 7 is refer to, the projection for keeping off convex 410 autocondensation plate 400 is formed；Range hood also includes patch Located at the paster 800 of the lateral surface of cold plate 400, the inner chamber of the covering of paster 800 gear convex 410 is set.In the present embodiment, paster 800 Glass material typically is used, is so easier to obtain smooth surface and easy to clean., can be certain by setting paster 800 Degree acts on behalf of the guide functions of cold plate 400, by covering the inner chamber of gear convex 410, can avoid the flue gas gas along cold plate 400 Flow and vortex is formed at the inner chamber of gear convex 410.

Further, it refer to Fig. 5 and Fig. 7, the altitude range of gear convex 410 is more than or equal to 5mm, and is less than or equal to 10mm.In the present embodiment, show that the gear convex 410 of this altitude range can be formed to flue gas condensing by test of many times test Oil droplet play preferable water conservancy diversion and barriering effect.

Further, the windward side 412 of gear convex 410 is obliquely installed relative to cold plate 400, windward side 412 and cold plate Angular range between 400 is more than 90 °, and less than or equal to 135 °.

In the present embodiment, windward side 412 is inclined-plane, it is possible to understand that windward side 412 can also be what is be equally obliquely installed Concave curved surface or convex surface.By the way that windward side 412 is obliquely installed, so as to which flue gas is flowing to smoking chamber 120 through air intake passage 330 During, it is possible to reduce to the resistance of flow of flue gas.Also just say, the flowing of flue gas is more smooth, and then caused noise is just more It is few.

Further, Fig. 2 to Fig. 7 is refer to, range hood also includes diffusion plate 900, and diffusion plate 900 has water conservancy diversion side Side 910 and diffusion side 920, water conservancy diversion side 910 are connected with the side of cold plate 400, and diffusion side 920 extends to exhaust fume collecting hood In 300 smoke collecting chamber 310, there is airspace (not shown) between the inwall of diffusion side 920 and smoke collecting chamber 310；And/or

Air vent 930 is offered on diffusion plate 900.

In the present embodiment, the shape of diffusion plate 900 can have a lot, such as circular, ellipse, triangle, and polygon Deng being not particularly limited, be defined by that can be fixedly connected with the sidewall 34 0 of cold plate 400 or smoke collecting chamber 310 herein.It is preferred that Ground, refer to Fig. 8 and Fig. 9, and diffusion plate 900, cold plate 400 and gear convex 410 are wholely set.Such as diffusion plate 900 can with it is cold Solidifying plate 400 and gear convex 410 are obtained by same plate stamping, or are spliced by multi-sheets.It is understood that diffusion Plate 900, cold plate 400 and gear convex 410 between any two can also split settings, such as it can be individual components and to lead to keep off convex 410 The mode for crossing screw or welding is fixed on cold plate 400.The quantity of diffusion plate 900 is also not particularly limited herein, Ke Yiyou A lot, can be depending on actual conditions, in accompanying drawing exemplified by four pieces.The material of diffusion plate 900 can have a lot, as solid wood, Glass, metal etc., by taking stainless steel as an example.The water conservancy diversion side 910 of diffusion plate 900 is fixedly connected with the side of cold plate 400, or is expanded For being fixedly connected of pressing plate 900 and the sidewall 34 0 of smoke collecting chamber 310, the connected mode can have a lot, such as snap connection, screw Connection, certainly, in certain embodiments, diffusion plate 900 and cold plate 400 can be integrally formed setting or diffusion plate 900 and collection The sidewall 34 0 of smoke chamber 310 is wholely set.What deserves to be explained is water conservancy diversion side 910 and diffusion side 920, can be oppositely arranged, It can be disposed adjacent, exemplified by being oppositely arranged.

The installation form of diffusion plate 900 has a variety of, is illustrated separately below.

There is airspace, i.e. diffusion side between the sidewall 34 0 of the first situation, diffusion plate 900 and smoke collecting chamber 310 There is airspace, the width of the airspace is less than cold plate 400 in smoke collecting chamber between 920 and the sidewall 34 0 of smoke collecting chamber 310 The distance between 310 sidewall 34s 0.Wherein, in order to ensure smoking effect, the width of airspace is more than 0mm, and is less than or waits In 90mm, in certain embodiments, with more than or equal to 45mm, and less than or equal to exemplified by 60mm.Diffusion side 920 can Have much with the angle of extension, be defined by the negative pressuren zone for meeting increase smoking.Wherein, the inwall of smoke collecting chamber 310 includes sidewall 34 0 With roof 350.Now, air vent 930 can be offered on diffusion plate 900, can also not open up air vent 930.

Diffusion side 920 extends into smoke collecting chamber 310 so that diffusion side 920 is compared to cold plate 400 and smoke collecting chamber The distance between 310 inwalls reduce, so that range hood, in smoking process, what is formed on the periphery of diffusion side 920 is negative Pressure, much larger than the negative pressure formed on the periphery of cold plate 400, so as to which in the case where the rotating speed of impeller 220 is certain, diffusion plate 900 has Beneficial to smoking negative pressure is improved, so as to improve smoking effect；Further, since diffusion plate 900 is in the distance between inwall of smoke collecting chamber 310 Reduce so that random air-flow can be entered more uniformly in flue 110 by airspace originally, so as to be advantageous to improve The uniformity of smoking.

Second case, air vent 930 is offered on diffusion plate 900, the shape of air vent 930 can have a lot, such as Circular, ellipse, triangle and polygon etc., do not do particular determination to the shape of air vent 930 herein.Air vent 930 Effect is identical with the effect of ventilation gap, is that flue gas offer passage is flowed in flue 110.After flue gas runs into cold plate 400, Under the guide functions of cold plate 400, the water conservancy diversion side 910 through diffusion plate 900 is flowed into diffusion plate 900, and flue gas is along diffusion Plate 900 flows to diffusion side 920, and during flow of flue gas, flue gas enters in the presence of negative pressure through air vent 930 Enter to flue 110, and range hood is discharged through flue 110 under suction function.Now, diffusion plate 900 and smoke collecting chamber 310 Inwall between there may be airspace, can also be not present airspace (now, the diffusion side 920 of diffusion plate 900 with The sidewall 34 0 or roof 350 of smoke collecting chamber 310 abut), when airspace be present, the flue gas for not passing through air vent 930 is whole Enter from airspace in flue 110.

Diffusion side 920 extends into smoke collecting chamber 310, and air vent 930 is arranged along diffusion plate 900 so that air vent 930 Position extended out compared to the gap between cold plate 400 and the inwall of smoke collecting chamber 310 so that range hood is in smoking process In, the negative pressure of formation at air vent 930, more than the negative pressure formed on the periphery of cold plate 400, so as in the rotating speed one of impeller 220 In the case of fixed, diffusion plate 900 and air vent 930 are advantageous to improve smoking negative pressure, so as to improve smoking effect；Further, since The position of air vent 930 is closer to the inwall of smoke collecting chamber 310, while air vent 930 also breaks up flue gas so that originally disorderly Air-flow more uniformly can be entered by air vent 930 in flue 110, so as to be advantageous to improve smoking uniformity. What deserves to be explained is when air-flow is extended along surrounding air inlet towards smoke collecting chamber 310, the side wall of smoke collecting chamber 310 can be guided The air-flow of 340 surroundings (including outside smoke collecting chamber 310) is flowed, and can so cause Tobacco Control region to increase.

In order to improve the smoking ability of range hood and the uniformity of smoking, the quantity of the air vent 930 be it is multiple, it is more The area sum of the individual air vent 930 gradually increases from the water conservancy diversion side 910 to the diffusion side 920.

Specifically, in the present embodiment, by by the area sum of air vent 930 from water conservancy diversion side 910 to diffusion side 920 Gradually increase so that the suction strength in negative pressure enhancing region is more uniform, when air-flow flows along diffusion plate 900, is led close The side of side 910 is flowed, blast is big, and flue gas concentration is high, but the area of air vent 930 is small；And close to the one of diffusion side 920 Side, wind speed is relatively low, and flue gas concentration is relatively low, and the area of air vent 930 is big so that negative pressure enhancement region area is increased same When, flue gas uniformly can enter flue 110 through air vent 930, so that flue gas is by layering uniform pickup so that The absorption of flue gas is more efficient, is advantageous to improve smoking effect.

Realize that the mode that the area sum of air vent 930 gradually increases from water conservancy diversion side 910 to diffusion side 920 has very It is more, two class examples are named to explain.Wherein, the first kind is to open up the air vent 930 of large aperture, each air vent 930 Variable area given rule above is just embodied, the second class is then to open up the air vent 930 of small-bore, and the shape in hole can have more Kind, realize variable area given rule above by setting perforate density.Certainly, in certain embodiments, the two can be mutual Staggeredly use, scope staggeredly should be fallen into the range of any type, described further below.

The first kind, the 930 elongated setting of air vent, multiple air vents 930 are distributed in the diffusion plate 900 Plate face on；The air vent 930 extends from the water conservancy diversion side 910 to the diffusion side 920, and its aperture leads to along described The bearing of trend of air holes 930 gradually increases.The shape of air vent 930 can have a lot, such as mounting hole, trapezoidal hole, water-drop-shaped hole Etc., as long as meeting that the width in hole is gradually increased.

The shape of air vent 930 is by taking water-drop-shaped as an example, and specifically, the air vent 930 is smaller in shape setting of dripping, width The chamfer radius at end are more than or equal to 2mm.The chamfer radius at the larger end of width are more than the chamfer radius of width small end.Pass through Air vent 930 is arranged to gradual change so that the also gradual change of the throughput of air-flow, so as to which the fluctuation of air-flow will not be caused so that air-flow Flowing it is very smooth.

Second class, the area of multiple air vents 930 is suitable, and the arrangement density of the air vent 930, is led described in Stream side 910 gradually increases to the diffusion side 920.The shape of air vent 930 can have a lot, circular, oval, polygon Shape etc..On from water conservancy diversion side 910 to the direction of diffusion side 920, the perforate density of air vent 930 is increasing so that logical The gross area of air holes 930 uniformly increases, so that the area of negative pressure region is increased, while negative pressure is more uniform so that The throughput of air-flow also gradual change, so as to which the fluctuation of air-flow will not be caused so that the flowing of air-flow is very smooth.

Preferred embodiment of the present utility model is these are only, not thereby limits the scope of the claims of the present utility model, it is every Under inventive concept of the present utility model, the equivalent structure transformation made using the utility model specification and accompanying drawing content, or Directly/be used in other related technical areas indirectly and be included in scope of patent protection of the present utility model.

Claims (14)

1. a kind of range hood, including exhaust fume collecting hood and cold plate, it is characterised in that：

The medial surface of the cold plate, which is provided with, keeps off convex, the range hood also sound-absorbing including being adhered to the cold plate medial surface Part, the sound-absorbing member lee face convex with the gear are connected.

2. range hood as claimed in claim 1, it is characterised in that the cold plate tilts down setting from front to back.

3. range hood as claimed in claim 2, it is characterised in that the gear convex closure is included before the condensation front edge of board Section is kept off, the front side of the front section is formed drains face greasy dirt is drained into left side and/or right side.

4. range hood as claimed in claim 3, it is characterised in that the drainage face extends downwardly or is turned under in step-like Qu Yanshen arc-shaped.

5. range hood as claimed in claim 3, it is characterised in that the front section from middle part toward left and right directions respectively to It is lower to tilt extension.

6. range hood as claimed in claim 5, it is characterised in that the front section with respect to the horizontal plane tilts down extension Angular range be [10 °, 15 °].

7. range hood as claimed in claim 6, it is characterised in that it is described gear it is convex also include it is relative with the front section after Keep off section, and the two side block sections between the front section and rear gear section, the front section, rear gear section and two side block sections be connected and Enclose to form ring-type.

8. range hood as claimed in claim 1, it is characterised in that the sound-absorbing member is sheet or convex closure shape, the suction Lampblack absorber also includes the protective cover for being located at sound-absorbing member periphery, is offered on the protective cover and multiple is communicated to the suction The penetrable sound hole of line part.

9. range hood as claimed in claim 8, it is characterised in that the convex projection from the cold plate of the gear is formed；Institute The paster that range hood also includes being attached at the cold plate lateral surface is stated, the convex inner chamber of the paster covering gear is set.

10. the range hood as described in claim any one of 1-9, it is characterised in that the convex altitude range of the gear be more than Or equal to 5mm, and it is less than or equal to 10mm.

11. range hood as claimed in claim 10, it is characterised in that the convex windward side of the gear is relative to the cold plate It is obliquely installed, the angular range between the windward side and the cold plate is more than 90 °, and less than or equal to 135 °.

12. the range hood as described in claim any one of 1-9, it is characterised in that also including diffusion plate, the diffusion plate tool There are water conservancy diversion side and diffusion side, the water conservancy diversion side is connected with the side of the cold plate, and the diffusion side extends to institute State in the smoke collecting chamber of exhaust fume collecting hood, there is airspace between the diffusion side and the inwall of the smoke collecting chamber；And/or

Air vent is offered on the diffusion plate.

13. range hood as claimed in claim 12, it is characterised in that the quantity of the air vent is multiple described to be multiple The area sum of air vent gradually increases from the water conservancy diversion side to the diffusion side.

14. range hood as claimed in claim 13, it is characterised in that the diffusion plate, cold plate and gear convex are wholely set.