CN206018768U - Range hood - Google Patents

Abstract

This utility model provides a kind of range hood, including：The first blower fan structure (20) is provided with casing (10), casing (10)；Discharge pipe (30), is arranged on the top of the first blower fan structure (20)；Gas boosting structure (40), is removably disposed on discharge pipe (30).The technical solution of the utility model can efficiently solve the pressurized construction of range hood of the prior art and lack motility, it is impossible to adapt to the problem of different user demands.

Description

Range hood

Technical field

This utility model is related to range hood technical field, in particular to a kind of range hood.

Background technology

At present, range hood smoking effect in a state of use is heavily dependent on the blast of range hood, wind Pressure is bigger, and smoking effect is better.When using, oil smoke needs by range hood body, air-out the range hood of normal domestic use Oil smoke is discharged by seat, discharge pipe and public passage, and said apparatus can be certain to the moving air generation in range hood Resistance, due to the presence of these resistances so that moving air has certain back pressure, the presence meeting of the back pressure in oil smoke exit Largely effect on the smoking effect of range hood.That is, suction of the blast of the blower fan system in range hood to range hood Cigarette effect has a positive effect, and the presence of back pressure then plays negative influence to the smoking effect of range hood.

In the prior art, in order to improve the blast of range hood, a kind of double wind of series connection for range hood are devised Machine structure.Specifically, above-mentioned series connection two fans structure includes main blower fan and secondary fan in blower hood.Main wind The air outlet of machine is connected by wind-guiding connecting tube with the air inlet of secondary fan, so as to realize being in fluid communication.The shell of main blower fan The housing of body and secondary fan overlaps in vertical projection, and the lower edge of the air inlet of secondary fan is located at overlapping region Top.Although above-mentioned series connection two fans structure can play a part of the blast for improving range hood, due to series connection pair Blower fan structure is arranged on inside the blower hood of range hood, lacks motility, for those two fans structures of need not connecting User for, their cost can be greatly increased.

Utility model content

Main purpose of the present utility model is to provide a kind of range hood, to solve range hood of the prior art Pressurized construction lacks motility, it is impossible to adapt to the problem of different user demands.

To achieve these goals, this utility model provides a kind of range hood, including：Casing, is provided with casing First blower fan structure；Discharge pipe, is arranged on the top of the first blower fan structure；Gas boosting structure, is removably disposed in air-out Guan Shang.

Further, gas boosting structure includes：Second blower fan structure, with fan inlet and fan outlet；Necking part, It is arranged at fan outlet, the area of passage that necking part has necking inner chamber, necking inner chamber is gradually reduced along gas flow direction.

Further, gas boosting structure also includes that the gas channel in the outside for being arranged on the second blower fan structure, air-flow lead to Road is connected with fan inlet and necking inner chamber, and the gas part at fan inlet is arranged through the second blower fan structure and necking part Go out, another part is discharged through gas channel and necking part.

Further, in a ring, gas channel is looped around the outside of the second blower fan structure for the cross section of gas channel.

Further, gas boosting structure also includes that enlarging part, enlarging part are arranged on the downstream of necking part, and enlarging part has Enlarging inner chamber, the area of passage of enlarging inner chamber gradually increase along gas flow direction.

Further, gas boosting structure also includes that there is air inlet and air outlet, the second blower fan structure to set for shell, shell Put in inside the shell, and fan inlet is arranged near air inlet, fan outlet is arranged near air outlet, and shell is included along gas stream Main paragraph, necking section and flared section that dynamic direction is sequentially connected, form gas between the inwall of main paragraph and the second blower fan structure Circulation road, necking section form necking part, and flared section forms enlarging part.

Further, the centrage of fan inlet and the centerline collineation of fan outlet or parallel.

Further, the centrage of air inlet is vertically arranged, and the centrage of air outlet is horizontally disposed with, and gas boosting structure sets Put in discharge pipe near one end of the first blower fan structure, and gas boosting structure be located at the first blower fan structure and discharge pipe it Between, range hood also includes, for connecting communicating pipe of gas boosting structure and the first blower fan structure, being vertically arranged simultaneously communicating pipe And the end of communicating pipe is connected on air inlet, discharge pipe is horizontally disposed with and the end of discharge pipe is connected on air outlet.

Further, the centrage of fan inlet and the centerline collineation of air inlet or parallel, the centrage of fan outlet With the centerline collineation of air outlet or parallel.

Further, gas boosting structure setting in discharge pipe near one end of the first blower fan structure, and gas boosting Structure is located between the first blower fan structure and discharge pipe, and casing includes chassis body and is arranged on the dress of the top of chassis body Decorations covers, the first blower fan structure is arranged in chassis body, and gas boosting structure is at least partially disposed in Decorative Cover.Further The internal diameter of the junction of ground, necking section and flared section is D5, wherein, 100mm≤D5≤300mm.

Further, 150mm≤D5≤250mm.

Further, necking section is D8, wherein, 0 along the length of the axial direction of shell<D8≤(1/2)*D5.

Further, fan outlet on the axial direction of shell with the distance between necking section and the junction of flared section For D7, wherein, 0<D7≤2*D8.

Further, the expansion angle of flared section is A, wherein, 5 °≤A≤15 °.

Application the technical solution of the utility model, arranges independent gas boosting structure, and the gas boosting structure is detachable Be arranged on discharge pipe.Above-mentioned gas pressurized construction is connected with the first blower fan structure and discharge pipe, and the first blower fan structure goes out The flowing gas for coming are discharged after gas boosting structure, and in the process, above-mentioned gas pressurized construction can play raising and inhale The effect of the whole system blast of lampblack absorber, so that improve smoking effect.Meanwhile, gas boosting structure is to be removably disposed, Higher using motility, for a user, gas boosting structure is the part that can be matched, can be according to the concrete of use environment Situation, is selectively bought and is installed, very hommization, convenient.

Description of the drawings

The Figure of description for constituting the part of the application is used for providing further understanding to of the present utility model, this practicality New schematic description and description is used for explaining this utility model, does not constitute to improper restriction of the present utility model. In the accompanying drawings：

Fig. 1 shows the perspective diagram of the embodiment one according to range hood of the present utility model；

Fig. 2 shows the perspective diagram of another angle of the range hood of Fig. 1；

Fig. 3 shows the structural representation of the partly cut-away of the gas boosting structure of the range hood of Fig. 1；

Fig. 4 shows the cross-sectional schematic of the gas boosting structure of the range hood of Fig. 1；

Fig. 5 shows the schematic front view of the gas boosting structure of Fig. 4；

Fig. 6 shows the schematic side view of the gas boosting structure of Fig. 4；

Fig. 7 shows that the section view of the second blower fan structure of the embodiment two according to range hood of the present utility model is illustrated Figure；

Fig. 8 shows the perspective diagram of the embodiment three according to range hood of the present utility model；

Fig. 9 shows the perspective diagram of the example IV according to range hood of the present utility model；

Figure 10 shows the perspective diagram of the embodiment five according to range hood of the present utility model；

Figure 11 shows the perspective diagram of the embodiment six according to range hood of the present utility model；And

Figure 12 shows the structural representation of the second blower fan structure of the range hood of Figure 11.

Wherein, above-mentioned accompanying drawing includes the following drawings labelling：

10th, casing；11st, chassis body；12nd, Decorative Cover；20th, the first blower fan structure；30th, discharge pipe；40th, gas boosting knot Structure；41st, the second blower fan structure；411st, fan inlet；412nd, fan outlet；42nd, necking inner chamber；43rd, gas channel；44th, shell； 441st, air inlet；442nd, air outlet；443rd, main paragraph；444th, necking section；445th, flared section；50th, communicating pipe；60th, common flue； 70th, air outlet seat.

Specific embodiment

It should be noted that in the case where not conflicting, the feature in embodiment and embodiment in the application can phase Mutually combine.Below with reference to the accompanying drawings and in conjunction with the embodiments describing this utility model in detail.

Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of this utility model, rather than whole Embodiment.It is illustrative below to the description only actually of at least one exemplary embodiment, never as to this practicality New and its application or any restriction for using.Embodiment in based on this utility model, those of ordinary skill in the art are not having There is the every other embodiment obtained under the premise of making creative work, belong to the scope of this utility model protection.

It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root Illustrative embodiments according to the application.As used herein, unless the context clearly indicates otherwise, otherwise singulative It is also intended to include plural form, additionally, it should be understood that, when in this manual using term "comprising" and/or " bag Include " when, which indicates existing characteristics, step, operation, device, component and/or combinations thereof.

Unless specifically stated otherwise, the part for otherwise illustrating in these embodiments and the table positioned opposite, digital of step Of the present utility model scope is not limited up to formula and numerical value.Simultaneously, it should be appreciated that for the ease of description, each shown in accompanying drawing The size of individual part is not to draw according to actual proportionate relationship.For skill known to person of ordinary skill in the relevant Art, method and apparatus may be not discussed in detail, but in the appropriate case, the technology, method and apparatus should be considered to award A part for power description.In all examples of shown here and discussion, any occurrence should be construed as merely example Property, not as restriction.Therefore, the other examples of exemplary embodiment can have different values.It should be noted that：Similar Label and letter in following accompanying drawing represent similar terms, therefore, once be defined in a certain Xiang Yi accompanying drawing, then with Which need not be further discussed in accompanying drawing afterwards.

In description of the present utility model, it is to be understood that the noun of locality such as " forward and backward, upper and lower, left and right ", " laterally, Vertically, vertically the orientation or position relationship indicated by, level " and " top, bottom " etc. is normally based on orientation shown in the drawings or position Relation is put, description this utility model is for only for ease of and is simplified description, in the case where contrary explanation is not made, these nouns of locality Do not indicate that and imply that the device or element of indication there must be specific orientation or with specific azimuth configuration and operation, because This is it is not intended that restriction to this utility model protection domain；The noun of locality " inside and outside " is referred to relative to each part wheel of itself Wide is inside and outside.

For the ease of description, space relative terms can be used here, such as " ... on ", " ... top ", " in ... upper surface ", " above " etc., for describing such as a device shown in the figure or feature and other devices or spy The spatial relation that levies.It should be appreciated that space relative terms are intended to comprising the orientation except device described in figure Outside different azimuth in use or operation.For example, if the device in accompanying drawing is squeezed, it is described as " in other devices To be positioned as " under other devices or construction after the device of part or construction top " or " on other devices or construction " Side " or " under other devices or construction ".Thus, exemplary term " ... top " can include " ... top " and " in ... lower section " two kinds of orientation.The device can also other different modes positioning (being rotated by 90 ° or in other orientation), and And respective explanations are made to the relative description in space used herein above.

Furthermore, it is necessary to illustrate, parts are limited using the word such as " first ", " second ", it is only for be easy to Corresponding parts are distinguished, such as without Stated otherwise, above-mentioned word does not have particular meaning, therefore it is not intended that to this The restriction of utility model protection scope.

As depicted in figs. 1 and 2, the range hood of embodiment one includes casing 10, discharge pipe 30 and gas boosting structure 40.Wherein, first blower fan structure 20 is provided with casing 10.Discharge pipe 30 is arranged on the top of the first blower fan structure 20.Gas Pressurized construction 40 is removably disposed in discharge pipe 30 near one end of the first blower fan structure 20, and 40, gas boosting structure Between the first blower fan structure 20 and discharge pipe 30.Gas boosting structure 40 is connected with the first blower fan structure 20 and discharge pipe 30 Logical.

The range hood of application the present embodiment, arranges independent gas boosting structure 40, and the gas boosting structure 40 is removable Discharge pipe 30 is arranged on unloading near one end of the first blower fan structure 20.Above-mentioned gas pressurized construction 40 and the first blower fan structure 20 Connect with discharge pipe 30, the first blower fan structure 20 flowing gas out are discharged after gas boosting structure 40, here mistake Cheng Zhong, above-mentioned gas pressurized construction 40 can play a part of the whole system blast for improving range hood, so as to improve smoking Effect.Meanwhile, gas boosting structure 40 is for being removably disposed, higher using motility, and for a user, gas boosting is tied Structure 40 is the part that can be matched, and can selectively be bought and installed according to the concrete condition of use environment, non-ordinary person Property, convenient.

In the prior art, the blast of range hood whole system be connect two fans structure main and secondary fan it The air quantity of that grade of big blower fan of air quantity with, the air quantity of whole system, but due to internal structure can be to the flowing in range hood Air produces certain resistance, produces back pressure, and actually air quantity is only the 80% of maximum quantity of wind.

As depicted in figs. 1 and 2, in the range hood of embodiment one, casing 10 includes chassis body 11 and is arranged on The Decorative Cover 12 of the top of chassis body 11.First blower fan structure 20 is arranged in Decorative Cover 12, and gas boosting structure 40 is located at The top of Decorative Cover 12.Oil smoke import is provided with chassis body 11, the oil smoke import, the inner chamber of chassis body 11, Decorative Cover 12 inner chamber and the inlet communication of the first blower fan structure 20.The exit of the first blower fan structure 20 is provided with air outlet seat 70.The One blower fan structure 20 is connected with gas boosting structure 40 by air outlet seat 70.The flowing gas of carrying oil smoke sequentially pass through oil smoke and enter Mouth, the inner chamber of chassis body 11, the inner chamber of Decorative Cover 12, the import of the first blower fan structure 20, the outlet of the first blower fan structure 20, Air outlet seat 70 is expelled in gas boosting structure 40.

As shown in Figures 1 to 6, in the range hood of embodiment one, gas boosting structure 40 includes shell 44 and sets Put the second blower fan structure 41 in the shell 44.There is shell 44 air inlet 441 and air outlet 442, the second blower fan structure 41 to have There are fan inlet 411 and fan outlet 412.Fan inlet 411 is arranged near air inlet 441, and fan outlet 412 is near air outlet 442 are arranged.The air inlet 441 of shell 44 is connected with air outlet seat 70, and the air outlet 442 of shell 44 is connected with the import of discharge pipe 30 Logical, the outlet of discharge pipe 30 is connected with common flue 60 as oil smoke outlet.Above-mentioned shell 44 is included along gas flow direction (i.e. The direction of air inlet 441 to air outlet 442) main paragraph 443, necking section 444 and the flared section 445 that are sequentially connected.Main paragraph Gas channel 43 is formed between 443 inwall and the second blower fan structure 41.Necking section 444 forms necking part, and the necking part is arranged At fan outlet 412.The area of passage that necking part has necking inner chamber 42, necking inner chamber 42 gradually subtracts along gas flow direction Little.Flared section 445 forms enlarging part, and the enlarging part is arranged on the downstream of necking part.Enlarging part has enlarging inner chamber, enlarging inner chamber Area of passage gradually increase along gas flow direction.

When range hood works, the air inlet that first passes through shell 44 by 70 expellant gas of air outlet seat (carrying oil smoke) 441 enter in shell 44.Gas is in the case where high blast and high wind speed drive, then the fan inlet 411 by the second blower fan structure 41 The second blower fan structure 41 is entered, is discharged by fan outlet 412.Due to the setting of gas channel 43, above-mentioned gas are from air inlet 441 Can be in the tapped upstream of fan inlet 411 after entering in shell 44：A part of gas enters the second wind by fan inlet 411 Machine structure 41, due to the isostructural stop of impeller of blower in the second blower fan structure 41, above-mentioned gas have certain air quantity and damage Lose；Another part gas then enters gas channel 43.Enter the work of the gas in the second blower fan structure 41 of the second blower fan structure 41 Increased with lower flow velocity, hereafter, the portion gas are expelled in the necking inner chamber 42 of necking section 444, now by fan outlet 412, As the area of passage of necking inner chamber 42 reduces, the flow velocity of gas further can increase.The second blower fan structure of above-mentioned entrance 41 Gas forms high velocity air after accelerating twice, and the high velocity air injection drives the gas flowing in gas channel 43 so as to Flow through necking inner chamber 42, flared section 445 and discharge from air outlet 442.Said structure employs Venturi tube structure, even if in oil suction In the case of there is back pressure in cigarette machine, it is also possible to ensure that air quantity is not suffered a loss, so as to ensure that smoking effect.Specifically, oil suction There is resistance inside cigarette machine, lose a part of air quantity, but as gas flow rate increasing degree is big, contracting is flowed to by gas channel 43 Gas at mouth part increases, and ensures air quantity with this and does not suffer a loss.

It should be noted that the structure not limited to this of gas boosting structure 40, the other embodiment not shown in figure In, gas boosting structure can only include the second blower fan structure and necking part, be not provided with shell and gas channel, and the second blower fan is tied The fan inlet of structure is connected with the first blower fan structure, and necking part is arranged at fan outlet, and necking part has a necking inner chamber, and second The fan outlet of blower fan structure and necking inner space, now, by fan outlet expellant gas, after necking part, flow velocity increases Greatly, partial gas can equally be drawn to discharge through the second blower fan structure again, guarantee so can be played to a certain extent The effect of air quantity；Or, gas boosting structure can include the second blower fan structure, necking part and be independently arranged at the second blower fan The gas channel in the outside of structure, is not provided with shell, and one end of gas channel is connected on fan inlet, gas channel another End and necking inner space, the gas at fan inlet are shunted, and a part part is through the second blower fan structure and necking Part is discharged, and another part is discharged through gas channel and necking part.

As shown in Figures 3 to 5, in the range hood of embodiment one, gas boosting structure includes enlarging part, in this enforcement In example, flared section 445 forms enlarging part, and the enlarging part is arranged on the downstream of necking part.Enlarging part has enlarging inner chamber, in enlarging The area of passage in chamber gradually increases along gas flow direction.When gas is through above-mentioned enlarging part, flow velocity can reduce, more conducively gas That flowed stablizes, and enlarging part is arranged with necking part jointly and the ejector action to the gas in gas channel can be made more notable, The effect for increasing air quantity is more preferable.Certainly, in the other embodiment not shown in figure, it is also possible to be not provided with enlarging part, only set Necking part is put, so can also play a part of to a certain extent to draw ambient gas.

As shown in Fig. 1, Fig. 3, Fig. 4 and Fig. 6, in the range hood of embodiment one, the cross section of gas channel 43 is in Annular.Gas channel 43 is looped around the outside of the second blower fan structure 41.In the present embodiment, the second blower fan structure 41 and shell 44 It is coaxially disposed, that is to say, that the channel volume everywhere of gas channel 43 is identical.Said structure is distributed can gas channel 43 More uniform, it is easy to stablizing for gaseous fluid.Certainly, the form of gas channel 43 and the second blower fan structure 41 and shell 44 Setting relation not limited to this, in the other embodiment not shown in figure, gas channel can be other forms, the second blower fan Structure can not also be coaxially disposed with shell.

As shown in Figures 4 to 6, in the range hood of embodiment one, the centrage and fan outlet of fan inlet 411 412 centerline collineation.In the present embodiment, the second blower fan structure 41 is axial flow blower.The centrage and blower fan of air inlet 441 The centerline collineation of import 411, the centrage of air outlet 442 are also conllinear with the centrage of fan outlet 412.That is, entering The centrage of air port 441, air outlet 442, fan inlet 411 and fan outlet 412 is conllinear.Said structure can try one's best compared with The loss of few air quantity.Certainly, the set-up mode not limited to this of fan inlet 411 and fan outlet 412, the second blower fan structure 41 Type is also not necessarily limited to this, and in other embodiments, fan inlet and fan outlet can be arranged otherwise, the second blower fan Structure can also be other kinds of blower fan, for example, it is possible to be cross flow fan, centrifugal blower etc., the electricity in the second blower fan structure Machine can be alternating current generator, or direct current generator.Additionally, the centrage of the centrage of fan inlet 411 and air inlet 441 It is not limited to collinearly, the centrage of fan outlet 412 is also not necessarily limited to collinearly, in other embodiment with the centrage of air outlet 442 In, the centrage of fan inlet can also be parallel with the centrage of air inlet, the centrage of fan outlet and the center of air outlet Line can also be parallel.

In the range hood of embodiment one, optimum optimization configuration is carried out to the structure of gas boosting structure 40, gas increases The scope of each size of laminated structure 40 is as follows：

Diameters of the D1 for air inlet 441, diameters of the D2 for fan outlet 412, D3 is the external diameter of the second blower fan structure 41, D4 For the external diameter of shell 44, internal diameters of the D5 for 445 junction of necking section 444 and flared section, length of the D6 for flared section 445, D7 is The distance between fan outlet 412 and 445 junction of necking section 444 and flared section, expansion angles of the A for flared section 445, D8 is necking The length of section 444, length of the D9 for shell 44.

Wherein, key dimension is：

100mm≤D5≤300mm, preferably 150mm≤D5≤250mm；

0<D8≤(1/2)*D5；

0<D7≤2*D8；

5°≤A≤15°；

Other sizes are as follows：

D1=160～200mm；

1.1≤D4/D1≤1.4；

0.7≤D2/D1≤0.8；

1.45≤D3/D2≤1.55；

1.3≤D5/D2≤1.4；

400mm≤D9≤600mm；

0.15≤D6/D9≤0.25.

As shown in fig. 7, the range hood of embodiment two and embodiment one are differred primarily in that, in fan inlet 411 Heart line and the centerline parallel of fan outlet 412.Said structure is in order to adapt to specific installation environment and to design so as to be easy to Install, and the range hood without embodiment one in the effect for ensureing air quantity is good.The other structures of the present embodiment and work are former Reason is essentially identical with the range hood of embodiment one, will not be described here.

As shown in figure 8, the range hood of embodiment three and embodiment one are differred primarily in that, gas boosting structure 40 can Discharge pipe 30 one end away from first blower fan structure 20 is releasably arranged on.The exit of the first blower fan structure 20 is provided with air-out Seat 70.First blower fan structure 20 is connected with discharge pipe 30 by air outlet seat 70.The air inlet and discharge pipe of gas boosting structure 40 30 connections, the air outlet of gas boosting structure 40 are connected with common flue 60 by one section of connecting tube.The fume-exhausting of the present embodiment The other structures and operation principle of machine are essentially identical with the range hood of embodiment one, will not be described here.

It should be noted that the set location not limited to this of gas boosting structure 40, other enforcements not shown in figure In mode, gas boosting structure can be arranged on the middle part of discharge pipe.

As shown in figure 9, the range hood of example IV and embodiment one are differred primarily in that, casing 10 includes casing master Body 11 and be arranged on chassis body 11 top Decorative Cover 12.First blower fan structure 20 is arranged in chassis body 11, gas The part of body pressurized construction 40 is arranged in Decorative Cover 12.As shown in Fig. 2 the first blower fan structure of the range hood of embodiment one 20 are arranged in Decorative Cover 12, and gas boosting structure 40 is located at the top of casing 10, and the space of occupancy is larger.In actual installation When, it is typically only capable to by gas boosting structure 40 in furred ceiling, with significant limitation.Ask to solve above-mentioned installation Topic, the range hood of the present embodiment are arranged on the first blower fan structure 20 in chassis body 11, the part of gas boosting structure 40 It is hidden in Decorative Cover 12, size so in the height direction will be substantially reduced, and save a lot of spaces, be easily installed Use with user.

As shown in Figure 10, the range hood of embodiment five and embodiment one differ primarily in that the second blower fan structure is Centrifugal blower.The centrage of the air inlet of gas boosting structure 40 is horizontally disposed with, the centrage of air inlet and the center of air outlet Line is mutually perpendicular to.Gas boosting structure 40 is arranged on discharge pipe 30 near one end of the first blower fan structure 20, and gas boosting Structure 40 is located between the first blower fan structure 20 and discharge pipe 30.Range hood is also included for connecting 40 He of gas boosting structure The communicating pipe 50 of the first blower fan structure 20.It is vertically arranged communicating pipe 50 and one end of communicating pipe 50 has level connection joint portion, should Level connection joint portion is connected on air inlet.Discharge pipe 30 is horizontally disposed with and one end of discharge pipe 30 has vertical connecting portion, should Vertically connecting portion is connected on air outlet.Said structure realizes the connection of gas boosting structure 40, but gas boosting structure 40 Connected mode complex, the space of occupancy is very big, poor availability.

As is illustrated by figs. 11 and 12, the range hood of embodiment six and embodiment five are differred primarily in that, the second blower fan Structure 41 is centrifugal blower.The centrage of air inlet 441 is vertically arranged, and the centrage of air outlet 442 is horizontally disposed with, air inlet 441 centrage is mutually perpendicular to the centrage of air outlet 442.Gas boosting structure 40 is arranged on discharge pipe 30 near the first wind One end of machine structure 20, and gas boosting structure 40 is positioned between the first blower fan structure 20 and discharge pipe 30.Range hood is also Including for connecting the communicating pipe 50 of gas boosting structure 40 and the first blower fan structure 20.Communicating pipe 50 is vertically arranged and connects One end of pipe 50 is connected on air inlet 441.Discharge pipe 30 is horizontally disposed with and one end of discharge pipe 30 is connected to air outlet 442 On.Compared with embodiment five, gas boosting structure 40 is arranged on discharge pipe 30 and communicating pipe 50 to the range hood of the present embodiment 90 ° of corners, so not only air intake is smooth, and very save space.

Preferred embodiment of the present utility model is the foregoing is only, this utility model is not limited to, for this For the technical staff in field, this utility model can have various modifications and variations.All of the present utility model spirit and principle Within, any modification, equivalent substitution and improvements that is made etc. are should be included within protection domain of the present utility model.

Claims (15)

1. a kind of range hood, it is characterised in that include：

The first blower fan structure (20) is provided with casing (10), casing (10)；

Discharge pipe (30), is arranged on the top of the first blower fan structure (20)；

Gas boosting structure (40), is removably disposed on the discharge pipe (30).

2. range hood according to claim 1, it is characterised in that gas boosting structure (40) include：

Second blower fan structure (41), with fan inlet (411) and fan outlet (412)；

Necking part, is arranged on the fan outlet (412) place, and the necking part has necking inner chamber (42), the necking inner chamber (42) area of passage is gradually reduced along gas flow direction.

3. range hood according to claim 2, it is characterised in that gas boosting structure (40) also include being arranged on The gas channel (43) in the outside of the second blower fan structure (41), gas channel (43) and the fan inlet (411) Connect with necking inner chamber (42), the gas part at fan inlet (411) place is through second blower fan structure (41) discharge with the necking part, another part is discharged through the gas channel (43) and the necking part.

4. range hood according to claim 3, it is characterised in that the cross section of gas channel (43) in a ring, Gas channel (43) are looped around the outside of the second blower fan structure (41).

5. range hood according to claim 3, it is characterised in that gas boosting structure (40) also include enlarging Part, the enlarging part are arranged on the downstream of the necking part, and the enlarging part has enlarging inner chamber, the excessively stream of the enlarging inner chamber Area gradually increases along gas flow direction.

6. range hood according to claim 5, it is characterised in that gas boosting structure (40) also include shell (44), described shell (44) there is air inlet (441) and air outlet (442), the second blower fan structure (41) to be arranged on described In shell (44), and the fan inlet (411) is arranged near the air inlet (441), and fan outlet (412) are close Described air outlet (442) are arranged, and shell (44) include main paragraph (443), the necking being sequentially connected along gas flow direction Section (444) and flared section (445), form institute between the inwall of main paragraph (443) and the second blower fan structure (41) Gas channel (43) is stated, described necking section (444) form the necking part, and described flared section (445) form the enlarging part.

7. range hood according to claim 6, it is characterised in that the centrage of fan inlet (411) with described The centerline collineation or parallel of fan outlet (412).

8. range hood according to claim 6, it is characterised in that the centrage of air inlet (441) is vertically arranged, The centrage of air outlet (442) is horizontally disposed with, and it is close that gas boosting structure (40) are arranged on the discharge pipe (30) The one end of the first blower fan structure (20), and the gas boosting structure (40) be located at the first blower fan structure (20) and Between discharge pipe (30), the range hood is also included for connecting gas boosting structure (40) and first wind The communicating pipe (50) of machine structure (20), communicating pipe (50) are vertically arranged and the end of the communicating pipe (50) is connected to institute State on air inlet (441), described discharge pipe (30) are horizontally disposed with and the end of discharge pipe (30) is connected to the air-out On mouth (442).

9. the range hood according to any one of claim 6 to 8, it is characterised in that in fan inlet (411) Heart line centerline collineation or parallel with the air inlet (441), the centrage and the air outlet of the fan outlet (412) (442) centerline collineation or parallel.

10. range hood according to claim 1, it is characterised in that gas boosting structure (40) are arranged on described The one end of discharge pipe (30) near the first blower fan structure (20), and the gas boosting structure (40) is located at described first Between blower fan structure (20) and the discharge pipe (30), described casing (10) include chassis body (11) and are arranged on the machine The Decorative Cover (12) of the top of shell main body (11), the first blower fan structure (20) are arranged in the chassis body (11), institute State being at least partially disposed in the Decorative Cover (12) for gas boosting structure (40).

11. range hoods according to claim 6, it is characterised in that necking section (444) and the flared section (445) internal diameter of junction is D5, wherein, 100mm≤D5≤300mm.

12. range hoods according to claim 11, it is characterised in that 150mm≤D5≤250mm.

13. range hoods according to claim 11 or 12, it is characterised in that necking section (444) are along the shell (44) length of axial direction is D8, wherein, 0<D8≤(1/2)*D5.

14. range hoods according to claim 13, it is characterised in that fan outlet (412) are in the shell (44) it is D7 with the distance between the junction of necking section (444) and the flared section (445) on axial direction, its In, 0<D7≤2*D8.

15. range hoods according to claim 14, it is characterised in that the expansion angle of flared section (445) is A, wherein, 5°≤A≤15°.