CN208918921U - Volute tongue, spiral case and kitchen ventilator - Google Patents

Abstract

The utility model discloses a kind of volute tongue, spiral case and kitchen ventilators, the volute tongue extends along the longitudinal direction, fluid channel is formed in the volute tongue, the fluid channel has entrance and spout, the fluid channel is suitable for introducing fluid from the entrance and spray from the spout, the spout is set on the outer surface of the volute tongue, and the spout is configured to be suitable for spraying fluid towards the inner space of spiral case.According to the volute tongue of the utility model embodiment, structure is simple, has cleaning function, can simplify the structure of spiral case and kitchen ventilator with the volute tongue etc..

Description

Volute tongue, spiral case and kitchen ventilator

Technical field

The utility model relates to air stream drives equipment technical field, special this is related to a kind of volute tongue, the spiral case with the volute tongue And the kitchen ventilator with the spiral case.

Background technique

After smoke machine works long hours, greasy dirt can be more and more inside smoke machine, and leading to the decline of smoke machine performance, (noise increases, wind Amount reduces, and power consumption becomes larger), while inside is easy to produce bacteria and mold and falls, therefore smoke machine work a period of time need to its into Row cleaning；Mainly smoke machine inside is cleaned using hot water cleaning, steam clean etc. on the market at present.Steam clean it is basic Principle is that steam is generated by steam generator, and then steam is delivered on the spout of nozzle tip, and steam is quick in spout It sprays, washes away impeller and spiral case is cleaned.The defects of that there are noises is big for the cleaning mode of the relevant technologies, and structure is complicated.

Utility model content

The utility model first aspect is to propose a kind of volute tongue, and structure is simple, has cleaning function, can simplify has The structure of the spiral case and kitchen ventilator of the volute tongue etc..

The utility model second aspect is to propose a kind of spiral case with the volute tongue.

The utility model third aspect is to propose a kind of kitchen ventilator with the spiral case.

According to the volute tongue of the utility model embodiment, the volute tongue extends along the longitudinal direction, and stream is formed in the volute tongue Body channel, the fluid channel have entrance and spout, and the fluid channel is suitable for introducing fluid from the entrance and from described Spout injection, the spout are set on the outer surface of the volute tongue, and the spout is configured to be suitable for towards the inside of spiral case sky Between spray fluid.

According to the volute tongue of the utility model embodiment, structure is simple, has cleaning function, can simplify with the volute tongue The structure of spiral case and kitchen ventilator etc..

In addition, can also have the following additional technical features: according to the volute tongue of the utility model above-described embodiment

In some embodiments, the volute tongue has windward side, leeward and connects the windward side and the leeward Transition face, inner space of the windward side towards spiral case, exterior space of the leeward towards the spiral case, it is described windward Face is equipped with the spout.

In some embodiments, there is spaced multiple spouts along the longitudinal direction on the windward side.

In some embodiments, the volute tongue has leading flank and trailing flank, and the entrance is set to the leading flank and described On at least one of trailing flank.

In some embodiments, the fluid channel extends along the longitudinal direction.

In some embodiments, the fluid channel includes diversion section and expanding reach, and the fluid channel is in the diameter of expanding reach It is greater than the radial dimension of step hole shape of the diversion section to size, the entrance is set to the expanding reach, and the spout connects Lead to the diversion section.

In some embodiments, it is equipped in the entrance of the fluid channel and connects soft set.

In some embodiments, the volute tongue includes: body part and reinforcing rib.There is cavity, the stream in the body part Body channel is separated with the cavity；At least part of the reinforcing rib is set in the body part, and the reinforcing rib and institute The inner surface for stating body part is connected.

In some embodiments, the inner surface of the body part is equipped with convex ribs, the interior table of the convex ribs and the body part The fluid channel is formed between face.

In some embodiments, the body part, the convex ribs and the reinforcing rib are integrally formed.

In some embodiments, the reinforcing rib is equipped with convex buckle and stud, the prominent cavity of the convex buckle, the stud If in the cavity.

According to the spiral case of the utility model second aspect, comprising: snail shell, volute tongue, the volute tongue and the snail shell phase The inner peripheral surface of snail shell described in Lian Bingcong protrudes into the snail shell, and the volute tongue is according to volute tongue above-mentioned.

In some embodiments, the volute tongue is integrally formed with the snail shell or is connect by fixing piece.

According to the kitchen ventilator of the utility model third aspect, comprising: shell, spiral case, impeller and steam generator, it is described Spiral case is disposed in the housing, and the spiral case is according to spiral case above-mentioned；The impeller is set in the spiral case；The steam hair The outlet of raw device is connected with the entrance of the fluid channel.

In some embodiments, the steam generator is set to above the spiral case, the steam generator and the fluid Channel is connected by pipe portion.

Detailed description of the invention

Fig. 1 is the schematic diagram of the volute tongue of the utility model one embodiment.

Fig. 2 is the cross-sectional view of the volute tongue of the utility model one embodiment.

Fig. 3 is the schematic diagram of the kitchen ventilator of the utility model one embodiment.

Fig. 4 is the partial enlargement diagram that Fig. 3 centre circle A shows region.

Appended drawing reference:

Kitchen ventilator 100,

Shell 1,

Spiral case 2, snail shell 21, volute tongue 22, windward side 201, leeward 202, transition face 203, body part 221, reinforcing rib 222, convex ribs 204, convex buckle 205, stud 206, fluid channel 207, spout 2071, entrance 2072, diversion section 2073, expanding reach 2074, cavity 208 connects soft set 209,

Steam generator 3,

Impeller 4,

Specific embodiment

The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model Limitation.

Combined with Figure 1 and Figure 2, according to the volute tongue of the utility model embodiment 22, volute tongue 22 extends along the longitudinal direction, volute tongue 22 On be formed with fluid channel 207, in volute tongue 22 formed fluid channel 207, can simplify the structure of volute tongue 22.Fluid channel 207 have entrance 2072 and spout 2071, and external fluid can be entered inside fluid channel 207 by entrance 2072.Example Fluid can be such as stored in fluid channel 207, be sent out when needed from spout 2071；It is also possible to from entrance 2072 The fluid entered in fluid channel 207 is immediately sprayed from spout 2071 without storing.Fluid inside fluid channel 207 can To be ejected by spout 2071.Specifically, fluid channel 207 is suitable for introducing fluid from entrance 2072 and from spout 2071 Injection.Fluid injection can be arrived into scheduled direction and position by spout 2071, spout 2071 is set to the appearance of volute tongue 22 On face, and spout 2071 is configured to be suitable for spraying fluid towards the inner space of spiral case 2, wherein the inner space of spiral case 2 is Refer to, the space that fluid passes through is used for after the volute tongue is applied on spiral case, in spiral case.

In addition, the fluid may include the fluids such as water, steam, ozone, it is not limited to gas or liquid.Preferably, originally Fluid in utility model is liquid with cleaning function, such as detergent, detergent and the mixture of water etc., so as to Realize washing.

According to the volute tongue 22 of the utility model embodiment, structure is simple, has cleaning function, can simplify with the volute tongue The structure of 22 spiral case 2 and kitchen ventilator etc..

In addition, the injection direction of spout 2071 is a specified direction in the utility model, the spray in the utility model Mouth 2071 can spray fluid towards 2 inner wall of spiral case, can also spray fluid etc. towards the impeller 4 in spiral case 2.According to different Design requirement selects that spout 2071 is arranged in different positions.

When transporting cleansing medium by fluid channel 207, the position cleaned is selected, then spout is set 2071 setting position and form.

For example, can choose the position of spout 2071 when needing to clean impeller 4, so that spout 2071 can be with Medium can be ejected on impeller 4 in carrying out cleaning process by spout 2071 towards impeller 4.

In another example spout 2071 can be arranged when needing the inside to spiral case 2 to clean and be suitable for cleaning at other Position, it is equally possible that the different location on the surface of volute tongue 22 is equipped with spout 2071.

Round hole of the diameter within the scope of 1 millimeter to 5 millimeters can be set into spout 2071, and maximum width also can be set into Spend the elongate holes less than 5 millimeters.Certainly, these descriptions to 2071 size of spout are for convenience to the utility model skill The understanding of art scheme is not the limitation to scope of protection of the utility model.

In some embodiments, in conjunction with Fig. 1 to Fig. 4, volute tongue 22 has windward side 201, leeward 202 and connection windward side 201 and leeward 202 transition face 203, inner space of the windward side 201 towards spiral case 2, leeward 202 is outer towards spiral case 2 Portion space.In spiral case 2, the windward side 201 of volute tongue 22 is the surface towards 4 side of impeller of volute tongue 22, volute tongue 22 it is leeward Face 202 is the surface away from 4 side of impeller of volute tongue 22, and the transition face 203 of volute tongue 22 is the surface at the tip of the tongue of volute tongue 22.

Wherein, the windward side 201 in the utility model, leeward 202 and transition face 203 be according to actual needs into Row selection, for example, windward side 201, leeward 202 or transition face 203 can be not provided in volute tongue 22.

In addition, volute tongue 22 can be the form with 21 one of snail shell of spiral case 2, therefore, the windward side 201 of volute tongue 22, At least partly can be in leeward 202 and transition face 203 is integrally formed on snail shell 21.

Further, windward side 201 is equipped with spout 2071, and windward side 201 is towards spiral case 2 it can be seen from front Inner space, in especially some preferred embodiments, windward side 201 be towards impeller 4, therefore, in the utility model Spout 2071 is set on windward side 201, can be sprayed a fluid on impeller 4 by spout 2071, inside spiral case 2 etc..

It is of course also possible to spout 2071 be installed in leeward 202,203 equipotential of transition face, to realize that spiral case 2 is whole Cleaning.

Preferably, there is spaced multiple spouts 2071 along the longitudinal direction on windward side 201.Spout 2071 is arranged At the multiple of time interval arrangement, multiple spouts 2071 can improve the effect of injection with 22 outflowing jet body of volute tongue.

In addition, the spout 2071 on windward side 201 can also be arranged in other manners, for example, by windward side 201 Multiple spouts 2071 are arranged to the form dissipated outward by center or matrix form etc., furthermore it is also possible to by spout 2071 It is arranged to elongated strip shaped etc..

Referring to Figures 1 and 2, in some embodiments, volute tongue 22 has leading flank and trailing flank, and entrance 2072 is set to leading flank With at least one of trailing flank.Entrance 2072 on 22 front and back sides of volute tongue is set, will not influence the wind-guiding of volute tongue 22, For example, when can connect volute tongue 22 and fluid input equipment by conduit, conduit will not be to oil smoke in kitchen ventilator 100 Circulation has an impact, so as to effectively improve fluid circulation efficiency and the stability in smoke machine, to noise is reduced, conveniently clearly The convenience such as clean has the effect of excellent.

Further, such as Fig. 2, fluid channel 207 extends along the longitudinal direction.Facilitate the form and production of volute tongue 22, improves The shaping efficiency of volute tongue 22.

Advantageously, referring to Fig. 2, fluid channel 207 includes diversion section 2073 and expanding reach 2074, and fluid channel 207 is in expansion The radial dimension of big section 2074 is greater than the radial dimension of step hole shape of diversion section 2073, and entrance 2072 is set to expanding reach 2074, spout 2071 is connected to diversion section 2073.Facilitate 207 connecting conduit of fluid channel, in the spiral case 2 for applying the volute tongue 22 or In smoke machine, the shaping efficiency of whole equipment can be promoted, and facilitates manufacture and maintenance, improves the efficiency of production and maintenance.

Further, referring to Figures 1 and 2, it is equipped in the entrance 2072 of fluid channel 207 and connects soft set 209.Setting connection Soft set 209 can effectively facilitate conduit connection fluid channel 207, improve the stabilization cooperated between conduit and fluid channel 207 Property, avoid conduit from falling off.

Such as Fig. 1, in some embodiments, volute tongue 22 includes: body part 221 and reinforcing rib 222.There is sky in body part 221 Chamber 208, fluid channel 207 are separated with cavity 208.At least part of reinforcing rib 222 is set in body part 221, and reinforcing rib 222 are connected with the inner surface of body part 221.Further, convex ribs 204, convex ribs can be equipped on the inner surface of body part 221 Fluid channel 207 is formed between 204 and the inner surface of body part 221.The structural strength of volute tongue 22 is improved, and alleviates volute tongue 22 weight.

Further, body part 221, convex ribs 204 and reinforcing rib 222 are integrally formed.Improve the structural strength of volute tongue 22 And stability.

In addition, the reinforcing rib 222 on body part 221 includes spaced apart multiple along the longitudinal direction.Referring to Fig.1, volute tongue For the shape extended along the longitudinal direction, the reinforcing rib 222 in volute tongue is arranged along perpendicular to direction in the front-back direction.In addition, may be used also Volute tongue is arranged to cross section as (or U-shaped) generally V-shaped, reinforcing rib 222 is arranged to the shape being adapted to the body part of volute tongue, That is, form generally V-shaped or U-shaped also can be set into the outer peripheral surface of reinforcing rib 222.

In some embodiments, such as Fig. 1, reinforcing rib 222 is equipped with convex buckle 205 and stud 206, the prominent cavity of convex buckle 205 208, stud 206 is set in cavity 208.Volute tongue 22 can be installed to spiral case 2 by the cooperation of convex buckle 205 and stud 206 On snail shell 21, to facilitate the assembly to volute tongue 22, maintenance and replacement.

Wherein it is possible to which opening is arranged on snail shell 21, volute tongue 22 is installed to the inner casing of spiral case 2, it can by convex buckle 205 Volute tongue 22 to be buckled on snail shell 21, then volute tongue 22 is stably installed on snail shell 21 by bolt, screw etc..

Referring to figs. 1 to Fig. 4, according to the spiral case 2 of the utility model second aspect, comprising: snail shell 21, volute tongue 22, volute tongue 22 are connected with snail shell 21 and protrude into snail shell 21 from the inner peripheral surface of snail shell 21, and volute tongue 22 is according to volute tongue 22 above-mentioned.

It can be defeated by volute tongue 22 using the volute tongue 22 of previous embodiment according to the spiral case 2 of the utility model embodiment Fluid is sent, tilts the inner space of spiral case 2, or for other purposes.The spiral case 2 of the utility model is provided with aforementioned volute tongue 22 all advantages, and the reality of 2 structure of spiral case is combined, simplify the structure of spiral case 2.

In some embodiments, volute tongue 22 is integrally formed with snail shell 21 or is connect by fixing piece.

Wherein, volute tongue 22 can be connect with snail shell 21 by fixing piece, such as volute tongue 22 and snail shell 21 are passed through spiral shell Nail, bolt etc. link together, and volute tongue 22 can also be installed on snail shell 21 by modes such as buckles, convenient for volute tongue 22 Installation, maintenance and replacement.

Furthermore it is also possible to which volute tongue 22 and snail shell 21 are integrally formed.For example, opening, volute tongue 22 are arranged on snail shell 21 The opening week in interior space along with the opening week on snail shell 21 along being connected, to realize the sealing and diversion effect of 2 entirety of spiral case.

Referring to figs. 1 to Fig. 4, according to the kitchen ventilator 100 of the utility model third aspect, comprising: shell 1, spiral case 2, impeller 4 And steam generator 3, spiral case 2 are set in shell 1, spiral case 2 is according to spiral case 2 above-mentioned.Impeller 4 is set in spiral case 2；Steam The outlet of generator 3 is connected with the entrance 2072 of fluid channel 207.

According to the kitchen ventilator 100 of the utility model embodiment, it is provided with steam generator 3, steam generator 3 can be passed through Output steam, and be transported in the fluid channel 207 of volute tongue 22 via the entrance of fluid channel 207 2072, it is then logical from fluid The spout 2071 in road 207 is sent out, and is realized to impeller 4, the isostructural cleaning of 2 inner wall of spiral case etc..

In addition, the volute tongue 22, spiral case 2 in the utility model can be used in other equipment, such as air conditioner etc., this Utility model mainly considers an urgent demand of the kitchen ventilator 100 for cleaning inside using kitchen ventilator 100 as reference, and For in the structures such as air conditioner, although not urgent to internal clean requirement, there is also clean needs, therefore, In air conditioner and other structures be arranged the utility model in spiral case 2 or volute tongue 22, can effectively improve clean effect and Efficiency.

Referring to Fig. 3, in some embodiments, steam generator 3 is set to 2 top of spiral case, steam generator 3 and fluid channel 207 are connected by pipe portion.Certainly, the steam generator 3 in the utility model also can be set and other positions.

The smoke machine product of the relevant technologies mainly uses the modes such as steam clean, hot water to be cleaned；Wherein hot water wash is logical Water pump is crossed water is pumped into heating module heating final output 60-85 degree hot water and cleans smoke machine inside from jet pipe ejection； It is water to be pumped into steam generator 3 by water pump to export 100 DEG C of -110 DEG C of steam, and spray by jet pipe that steam, which is washed, is washed away Inside smoke machine.The smoke machine product cleaning of the relevant technologies mainly has the cleaning such as steam, hot water, and steam and hot water etc. are both needed to pass through spray It is sprayed after pipe guidance, jet pipe, manufacture, the installation cost such as jet pipe folder are higher.

Steam channel is arranged inside volute tongue 22 in the utility model, and the steam that steam generator 3 generates is introduced directly into snail It is sprayed after tongue 22, spiral case 2, impeller 4 is cleaned, while guaranteeing cleaning pressure, the portions such as jet pipe, jet pipe folder can be saved Part simplifies structure, saves cost.

As shown in Fig. 2, 207 integrated apparatus of volute tongue 22 and fluid channel, is thin-wall construction, center vertical arrangement is multiple 222 structure of reinforcing rib, have below volute tongue 22 screw hole one for steam flowing fluid channel 207,207 one end of fluid channel have with The cavity 208 that soft set 209 cooperates is connected, there is the spout 2071 sprayed for steam in lower section.It is interference that soft set 209, which is connected, with volute tongue 22 Cooperate, thus connects soft set 209 when use relative motion will not occur with volute tongue 22 and be detached from.When cleaning, water pump is by water or clearly Clean liquid is pumped into steam generator 3, generates steam, and import in volute tongue 22 by hose, and steam is sprayed onto 4 surface of impeller by spray orifice, It is cleaned.

Newly-increased volute tongue 22 and jet pipe integrated apparatus can substitute jet pipe effect, make to steam while realizing 22 function of volute tongue Vapour cleans impeller 4 after passing through volute tongue 22.

Volute tongue 22 and jet pipe integrated apparatus structure, use the smoke machine overall structure to know from experience device.

If the volute tongue 22 of Fig. 3, the present embodiment include spout 2071, steam generator 3 and conduit, 2 outer wall of spiral case is in volute tongue Cavity 208 is formed at 22, which is located inside volute tongue 22, and spout 2071 is set in the cavity 208, steam generator 3 Air outlet on impeller 4 and close to spiral case 2 is arranged, is assembled under completion status, before steam generator 3 is hidden in spiral case 2 It is between baffle and rear baffle and opposite with the opening of cavity 208.The output end of steam generator 3 is connected with the first end of conduit It connects, the second end of conduit is connected with the input terminal of spout 2071.

Since the fluid field pressure of 22 position of volute tongue is minimum, and 22 position of volute tongue on entire 2 ring wall of spiral case one week apart from leaf It is nearest to take turns 4 blades, in use, cleansing medium can directly be sprayed to impeller 4 by spout 2071 by spout 2071 at volute tongue 22, has Effect shorten cleansing medium spray after stroke, meanwhile, by steam generator 3 be arranged in spiral case 2 front apron and rear baffle it Between and close to air outlet arrange that the setting position of steam generator 3 determines that its distance between spout 2071 is shorter, using compared with Short conduit can convey cleansing medium, shorten the conveying stroke before cleansing medium sprays, and be situated between to reduce cleaning The heat-energy losses of matter improve self-cleaning effect.

In the present embodiment, it is formed with the plug division that can be planted in the opening on spout 2071, assembles under completion status, inserts The end face of socket part matches with volute tongue 22 close to the surface of impeller 4, and spout 2071 is opened on the end face of plug division and with spout 2071 width direction is along the axial arrangement of impeller 4.The first side of spout 2071 is extending axially outward form along impeller 4 as support Plate assembles under completion status, and the supporting plate and 22 contacted inner surfaces of volute tongue are to carry out the plant position of plug division in the opening Limit.

The conveying flow passage that cleansing medium can be delivered to spout 2071 and radial ejection is provided in spout 2071.

In the present embodiment, 2072 area of entrance of spout 2071 be S1, discharge area S2, and S1 >=4S2 so that Spouting velocity of the cleansing medium at spout 2071 is 4 times or more of flowing velocity in runner, guarantees cleaning dynamics.

In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ", " width Degree ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", "outside", " suitable The orientation or positional relationship of the instructions such as hour hands ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " is orientation based on the figure Or positional relationship, be merely for convenience of describing the present invention and simplifying the description, rather than the device of indication or suggestion meaning or Element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as the limit to the utility model System.

In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or Implicitly include at least one this feature.The meaning of " plurality " is at least two, such as two in the description of the present invention, It is a, three etc., unless otherwise specifically defined.

In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary The interaction relationship of connection or two elements inside element, unless otherwise restricted clearly.For the common skill of this field For art personnel, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.

In the present invention unless specifically defined or limited otherwise, fisrt feature is in the second feature " on " or " down " It can be that the first and second features directly contact or the first and second features are by intermediary mediate contact.Moreover, first is special Sign can be fisrt feature above the second feature " above ", " above " and " above " and be directly above or diagonally above the second feature, or only Indicate that first feature horizontal height is higher than second feature.Fisrt feature under the second feature " below ", " below " and " below " can be with It is that fisrt feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term It states and is necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with It can be combined in any suitable manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this field Technical staff can by the feature of different embodiments or examples described in this specification and different embodiments or examples into Row combination and combination.

Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is Illustratively, it should not be understood as limiting the present invention, those skilled in the art are in the scope of the utility model Inside it can make changes, modifications, alterations, and variations to the above described embodiments.

Claims (15)

1. a kind of volute tongue, the volute tongue extends along the longitudinal direction, which is characterized in that fluid channel, institute are formed in the volute tongue Fluid channel is stated with entrance and spout, the fluid channel is suitable for introducing fluid from the entrance and spray from the spout, The spout is set on the outer surface of the volute tongue, and the spout is configured to be suitable for the inner space injection stream towards spiral case Body.

2. volute tongue according to claim 1, which is characterized in that the volute tongue has described in windward side, leeward and connection The transition face of windward side and the leeward, inner space of the windward side towards spiral case, the leeward is towards the snail The exterior space of shell, the windward side are equipped with the spout.

3. volute tongue according to claim 2, which is characterized in that have on the windward side spaced along the longitudinal direction Multiple spouts.

4. volute tongue according to claim 1, which is characterized in that the volute tongue has leading flank and right side, the entrance On at least one of the leading flank and the right side.

5. volute tongue according to claim 1, which is characterized in that the fluid channel extends along the longitudinal direction.

6. volute tongue according to claim 1, which is characterized in that the fluid channel includes diversion section and expanding reach, described Fluid channel is greater than the radial dimension of step hole shape of the diversion section in the radial dimension of expanding reach, and the entrance is set to institute State expanding reach, diversion section described in the spout connection.

7. volute tongue according to claim 1, which is characterized in that it is soft to be equipped with connection in the entrance of the fluid channel Set.

8. volute tongue according to claim 1, which is characterized in that the volute tongue includes:

Body part, the body part is interior to have cavity, and the fluid channel is separated with the cavity；

At least part of reinforcing rib, the reinforcing rib is set in the body part, and the reinforcing rib and the body part Inner surface is connected.

9. volute tongue according to claim 8, which is characterized in that the inner surface of the body part is equipped with convex ribs, described convex The fluid channel is formed between muscle and the inner surface of the body part.

10. volute tongue according to claim 9, which is characterized in that the body part, the convex ribs and the reinforcing rib one It is body formed.

11. volute tongue according to claim 8, which is characterized in that the reinforcing rib is equipped with convex buckle and stud, the convex buckle The prominent cavity, the stud are set in the cavity.

12. a kind of spiral case characterized by comprising

Snail shell；

Volute tongue, the volute tongue are connected with the snail shell and protrude into the snail shell, the snail from the inner peripheral surface of the snail shell Tongue is according to volute tongue of any of claims 1-11.

13. spiral case according to claim 12, which is characterized in that the volute tongue is integrally formed or passes through with the snail shell Fixing piece connection.

14. a kind of kitchen ventilator characterized by comprising

Shell；

Spiral case, the spiral case are disposed in the housing, and the spiral case is the spiral case according to claim 12 or 13；

Impeller, the impeller are set in the spiral case；

The outlet of steam generator, the steam generator is connected with the entrance of the fluid channel.

15. kitchen ventilator according to claim 14, which is characterized in that the steam generator is set to above the spiral case, The steam generator is connect with the fluid channel by pipe portion.