CN208442894U - Impeller, blower and kitchen ventilator - Google Patents

Abstract

The utility model provides a kind of impeller, blower and kitchen ventilator, is related to purification technology field.The impeller includes integrally formed blade and cricoid upper connecting band, lower connecting band, and multiple blades are all connected between connecting band and lower connecting band, and upper connecting band is equipped with upper folding part, and lower connecting band is equipped with lower folding part；The blower includes shell, driving part and above-mentioned impeller, and impeller is installed on enclosure interior, and the driving end of driving part and impeller are affixed；The kitchen ventilator includes cabinet and above-mentioned blower, and blower is fixedly arranged in cabinet, and the air inlet of blower is connected to the smoking port of cabinet.The impeller connectivity robustness is strong, operation stability is high, noise is small.

Description

Impeller, blower and kitchen ventilator

Technical field

The utility model relates to purification technology field more particularly to a kind of impellers, blower and kitchen ventilator.

Background technique

Kitchen ventilator is the purification device being widely used among kitchen, and the blower operating in kitchen ventilator generates negative pressure, by kitchen In the oil smoke sucking blower of room side, and oil smoke is transported in common flue through exhaust pipe, therefore, blower is the core of kitchen ventilator Component, effect superiority and inferiority directly determine kitchen ventilator to the clean-up effect of oil smoke.

The core component of existing blower is impeller, and impeller mainly includes Shang Quan, lower circle and blade, and multiple blades circumferentially connect It is connected between Shang Quan and lower circle formation tubular impeller, impeller internal is connected with mid-game, and the drive shaft of mid-game and motor is affixed, motor Drive shaft turns, drive mid-game and then drive entire wheel rotation.

Multiple blades are generally successively individually connected between Shang Quan and lower circle by existing impeller, and multiple blades are along upper circle Be circumferentially arranged, the connectivity robustness between blade and Shang Quan, lower circle is poor, during wheel rotation, junction be easy to loosen and Blade offset is caused even to fall, impeller running noises are big, drainage effect is poor, or even are not available.

Utility model content

The purpose of this utility model is to provide a kind of impeller, blower and kitchen ventilators, existing in the prior art to solve During wheel rotation, junction be easy to loosen and cause blade offset in addition fall, running noises are big, drainage effect is poor, very To not being available technical problem.

Impeller provided by the utility model, including blade and cricoid upper connecting band, lower connecting band, the blade are more A, multiple blades are all connected between the upper connecting band and the lower connecting band, and along the upper connecting band and described The circumferential dispersed distribution of lower connecting band, the upper connecting band are equipped with upper folding part, and the lower connecting band is equipped with lower folding part； The blade, the upper connecting band and the lower connecting band integrated molding are made.

Further, the upper folding part is set in the upper connecting band, and is located at the adjacent blade and the upper company Between the tie point of tape splicing；

And/or the lower folding part is set in the lower connecting band, and is located at the adjacent blade and the lower connecting band Tie point between.

Further, the upper folding part is bent by the upper connecting band, and the upper folding part includes at least one A bending body；

And/or the lower folding part is bent by the lower connecting band, and the lower folding part includes that at least one is curved Roll over body.

Further, the tubular inside cavity that multiple blades are formed is connected with mid-game, and the mid-game includes annular Outer ring and support frame, support frame as described above are connected in the ring of the outer ring, and with the outer ring coaxial line；The outer ring with it is described The tubular cavity that blade is formed is affixed.

Further, be radially equipped with outwardly open joint-cutting on the outer ring, the joint-cutting be it is multiple, it is multiple described For joint-cutting along the circumferential dispersed distribution of the outer ring, the blade matches grafting with the joint-cutting one by one.

Further, the blade is equipped with connecting hole, and the blade is located in the joint-cutting, the side wall of the joint-cutting Part corresponding with the connecting hole is pressed into the connecting hole.

Further, support frame as described above includes the vane of multiple radial settings, the rotation direction of the vane and the blade Rotation direction it is consistent, distance of the vane away from the upper connecting band be greater than the distance away from the lower connecting band.

Further, matching is connected with circle in the upper connecting band of the impeller, matches and is connected in the lower connecting band Lower circle, it is described it is upper circle for ring-type, and its radial section be it is U-shaped, the upper connecting band and the upper folding part are located on described It encloses in the U-type groove formed；

And/or the lower circle is ring-type, and its radial section is U-shaped, the lower connecting band and the lower folding part sandwiched In in the U-type groove that the lower circle is formed.

Another of the utility model is designed to provide a kind of blower, including shell, driving part and above-mentioned impeller, institute It states impeller and is installed on the enclosure interior, the driving end of the driving part and the impeller are affixed, for driving the impeller It is rotatable around its axis.

Another of the utility model is designed to provide a kind of kitchen ventilator, including cabinet and above-mentioned blower, the cabinet It is equipped with smoking port and smoke outlet, the blower is fixedly arranged in the cabinet, and the air inlet of the blower and the smoking port Connection, the air outlet of the blower are connected to the smoke outlet.

The utility model impeller, blower and kitchen ventilator have the beneficial effect that

Impeller, blower and kitchen ventilator provided by the utility model, wherein impeller include rotation can drive gas flow it is dynamic Blade, the upper connecting band for being respectively connected together the top and bottom of multiple blades and lower connecting band, upper connecting band, leaf Piece and the integrated molding of lower connecting band are made, and upper connecting band is equipped with the upper folding for adjusting spacing between two neighboring blade Portion, lower connecting band are equipped with the lower folding part for adjusting spacing between two neighboring blade；Wherein, blower includes being used to form The shell in the air duct that gas supply stream passes through, the impeller for generating driving force to air-flow and the driving portion for driving wheel rotation Part；Wherein, kitchen ventilator includes for accommodating the cabinet of blower and oil smoke, cabinet equipped with the suction for entering cabinet for external oil smoke Mouth and the smoke outlet being discharged for oil smoke.

When needing using kitchen ventilator, the driving part of blower is opened, driving part drives impeller along its axis rotation, multiple Blade rotation is oriented to the air-flow in oil smoke box body, is in negative pressure state in cabinet, the oil smoke outside kitchen ventilator is in inside and outside differential pressure Under the action of through smoking port flow into cabinet in, then followed by the air inlet of blower and air outlet after, from the smoke outlet of cabinet Discharge, completes the suction-discharge of oil smoke；When without using kitchen ventilator, the driving part of blower is closed.

Impeller is integrally formed and is formed by blade, upper connecting band and lower connecting band, the connectivity robustness between multiple blades compared with By force, it has been correspondingly improved stability when wheel rotation, and wheel rotation can be reduced in the process due to loosening the noise generated.

Detailed description of the invention

It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art Under the premise of labour, it is also possible to obtain other drawings based on these drawings.

Fig. 1 be impeller provided by the embodiment of the utility model and Shang Quan, it is lower enclose, structural schematic diagram when mid-game is connect；

Fig. 2 is that internal structure when impeller provided by the embodiment of the utility model is connect with Shang Quan, lower circle, mid-game is illustrated Figure；

Fig. 3 is the partial enlargement diagram of A in Fig. 2；

Fig. 4 is the structural schematic diagram of mid-game in blower provided by the embodiment of the utility model；

Fig. 5 is the schematic cross-sectional view of mid-game in blower provided by the embodiment of the utility model；

Fig. 6 is the partial enlargement diagram of B in Fig. 5；

Fig. 7 is the structural schematic diagram of impeller provided by the embodiment of the utility model；

Fig. 8 is structural schematic diagram when impeller provided by the embodiment of the utility model is unfolded；

Fig. 9 is the three dimensional structure diagram of impeller provided by the embodiment of the utility model.

Icon: 1- blade；The upper connecting band of 2-；Connecting band under 3-；It is enclosed on 4-；It is enclosed under 5-；6- mid-game；7-U type Slot；11- connecting hole；The upper interconnecting piece of 21-；The upper folding part 22-；The outer ring 61-；611- joint-cutting；62- vane.

Specific embodiment

The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical Novel protected range.

It is in the description of the present invention, it should be noted that term " center ", "upper", "lower", "left", "right", " perpendicular Directly ", the orientation or positional relationship of the instructions such as "horizontal", "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is only For ease of description the utility model and simplify description, rather than the device or element of indication or suggestion meaning must have it is specific Orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.

In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary, It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition The concrete meaning of language in the present invention.

The present embodiment provides a kind of impellers, as shown in figures 7 and 9, including blade 1 and cricoid upper connecting band 2, lower connection Band 3, blade 1 be it is multiple, multiple blades 1 are all connected between connecting band 2 and lower connecting band 3, and along upper connecting band 2 and lower company The circumferential dispersed distribution of tape splicing 3, upper connecting band 2 are equipped with upper folding part 22, and lower connecting band 3 is equipped with lower folding part；Blade 1, Upper connecting band 2 and the integrated molding of lower connecting band 3 are made；It is matched in the upper connecting band 2 of impeller and is connected with circle 4, in lower connecting band 3 Matching is connected with lower circle 5, and the tubular inside cavity that multiple blades 1 are formed is connected with mid-game 6.

The present embodiment also provides a kind of blower, as depicted in figs. 1 and 2, including shell, driving part and above-mentioned impeller, leaf Wheel is installed on enclosure interior, and the driving end of driving part and impeller are affixed, for driving impeller around its axis rotation.

The present embodiment also provides a kind of kitchen ventilator, including cabinet and above-mentioned blower, and cabinet is equipped with smoking port and smoke outlet, Blower is fixedly arranged in cabinet, and the air inlet of blower is connected to smoking port, and the air outlet of blower is connected to smoke outlet.

Impeller, blower and kitchen ventilator provided in this embodiment, wherein impeller includes that rotation being capable of the dynamic leaf of drive gas flow Piece 1, the upper connecting band 2 for being respectively connected together the top and bottom of multiple blades 1 and lower connecting band 3, upper connecting band 2, blade 1 and the integrated molding of lower connecting band 3 are made, and upper connecting band 2 is equipped with for adjusting spacing between two neighboring blade 1 Upper folding part 22, lower connecting band 3 are equipped with the lower folding part for adjusting spacing between two neighboring blade 1；Wherein, blower packet It includes and is used to form the shell in the air duct that gas supply stream passes through, for generating the impeller of driving force to air-flow and for driving wheel rotation Driving part；Wherein, kitchen ventilator includes for accommodating the cabinet of blower and oil smoke, cabinet equipped with for the entrance of external oil smoke The smoking port of cabinet and the smoke outlet being discharged for oil smoke.

When needing using kitchen ventilator, the driving part of blower is opened, driving part drives impeller along its axis rotation, multiple The rotation of blade 1 is oriented to the air-flow in oil smoke box body, is in negative pressure state in cabinet, the oil smoke outside kitchen ventilator is in inside and outside differential pressure Under the action of through smoking port flow into cabinet in, then followed by the air inlet of blower and air outlet after, from the smoke outlet of cabinet Discharge, completes the suction-discharge of oil smoke；When without using kitchen ventilator, the driving part of blower is closed.

Impeller is formed by the integrated molding of blade 1, upper connecting band 2 and lower connecting band 3, being connected firmly between multiple blades 1 Property it is stronger, be correspondingly improved stability when wheel rotation, and can reduce and be generated during wheel rotation due to loosening Noise.

Specifically, blade 1, upper connecting band 2 and the integrally formed manufacturing process of lower connecting band 3 can be such that

S100 chooses a rectangle material strips to be processed, cuts off excess stock, such as Fig. 8 along its width direction in material strips Shown, surplus material is the shape of impeller blade 1, and multiple blades 1 disperse arrangement, material bandwidth along the length direction of material strips The upper connecting band 2 and lower connecting band 3 of the residue strip of both sides up and down in direction；

S200 folds the part of upper connecting band 2 along its length, square along its length to lower connecting band 3 accordingly To part folded, with reduce two blades 1 between spacing；

Treated rectangle material band is rolled into tubular by S300 along its length, and upper connecting band 2 joins end to end, lower company Tape splicing 3 joins end to end, and realizes the integrated molding production of impeller.Specifically, above-mentioned processing flow can be added by automation Construction equipment is processed automatically, and machining accuracy is high, high-efficient.

When the internal diameter for the cylinder that blade 1 is rolled into is equal, the setting of upper folding part 22 and lower folding part can be realized blade 1, upper connecting band 2 and lower connecting band 3 be integrally formed made of on the basis of, the spacing that can be effectively shortened between adjacent blades 1, phase The quantity of blade 1 should be increased, improve the driving air quantity of impeller.

Specifically, upper folding part 22 is set in upper connecting band 2 in the present embodiment, and it is located at adjacent blades 1 and upper connecting band Between 2 tie point；And/or lower folding part is set in lower connecting band 3, and is located at the connection of adjacent blades 1 and lower connecting band 3 Between point.Folding part is between adjacent blades 1 and the tie point of connecting band, when folding to form folding part to connecting band, folds Portion is corresponding to reduce in process to blade 1 and connecting band tie point on not influencing at blade 1 and the tie point of connecting band External force influence, it is ensured that the angle of blade 1 is arranged and bonding strength.

Specifically, being illustrated for the above connecting band 2, upper connecting band 2 forms multiple upper folding parts 22 by folding, and Can closely connect between adjacent upper folding part 22 (can be understood as connecting band 2 by multiple upper folding parts 22 and is sequentially connected shape At)；In addition to above-mentioned form, can also there be gap between adjacent upper folding part 22, then the gap is upper interconnecting piece 21, blade 1 It is located on upper interconnecting piece 21 with the tie point of upper connecting band 2.Specifically, upper interconnecting piece 21 can with upper folding part 22 successively between Spacing between setting, multiple blades 1 is also equal.

Specifically, upper folding part 22 is bent by upper connecting band 2 in the present embodiment, and upper folding part 22 includes at least One bending body；And/or lower folding part is bent by lower connecting band 3, and lower folding part includes at least one bending body.It is curved The setting of folding body can shorten the length dimension of upper 2 outer dimension of connecting band, be illustrated for the above connecting band 2, such as Fig. 9 institute Show, upper folding part 22 includes two bending bodies interconnected, and two bending bodies can be compressed with upper connecting band 2 to be arranged；In addition, Upper folding part 22 also may include one, three, four bending body etc..

In addition, requiring to be greater than 1 spacing a of adjacent blades (on the impeller of certain diameter φ, it is desirable that blade for 1 width b of blade 1 quantity is Z, then a=π φ/Z) impeller, above-mentioned production method can be processed according to S100 blade 1 and upper connecting band 2, under Connecting band 3, the spacing between adjacent blades 1 are c；Upper connecting band 2 and the lower company between adjacent blades 1 are then folded according to S200 Tape splicing 3, it is b+c-a that length is shortened in folding part；Finally according to S300 webs of wrapping material, the spacing between two neighboring blade 1 is A, the setting of folding part be adapted to blade 1, the various width requirements of 1 spacing of adjacent blades processing (such as not set folding part, if When 1 spacing a of adjacent blades is less than 1 width b of blade, blade 1 is cut out in material strips, spacing minimum 0 between adjacent blades 1, In so rolled impeller, the spacing between adjacent blades 1 is b, and b is greater than a, processing request is not achieved).

In the present embodiment, as shown in Figure 4 and Figure 5, the tubular inside cavity that multiple blades 1 are formed is connected with mid-game 6, mid-game 6 may include annular outer ring 61 and support frame, support frame be connected in the ring of outer ring 61, and with 61 coaxial line of outer ring；Outer ring 61 is affixed with the tubular cavity of the formation of blade 1.It here is a kind of specific structure of driving part driving wheel rotation, fan operation When, driving part driving mid-game 6 drives entire impeller to rotate synchronously, and in rotation process, the blade 1 of impeller leads air-flow To guiding of the realization to oil smoke box body interior air-flow.

In the present embodiment, as shown in figure 4, can radially be equipped with outwardly open joint-cutting 611, joint-cutting on outer ring 61 611 is multiple, and for multiple joint-cuttings 611 along the circumferential dispersed distribution of outer ring 61, blade 1 matches grafting with joint-cutting 611 one by one.Here it is A kind of concrete form that mid-game 6 is connect with impeller, each blade 1 connect one to one with the joint-cutting 611 on 6 outer ring 61 of mid-game, Connectivity robustness is strong, and position precision is higher, mid-game 6 and the concentricity of impeller are higher.

Specifically, as shown in figure 8, connecting hole 11 can be equipped with blade 1, blade 1 is located in joint-cutting in the present embodiment In 611, in the side wall of joint-cutting 611 part indentation connecting hole 11 corresponding with connecting hole 11.Specifically, connection procedure is as follows: first The joint-cutting 611 (611 width of joint-cutting is approximately 0) for first cutting out certain depth from the outside to the core on the outer ring of mid-game 6 61, by joint-cutting The bending up and down respectively of the outer ring 61 of 611 two sides, the outer ring 61 of two sides form the gap of certain altitude difference (between as shown in Figure 6 Gap), similar, the gap of all joint-cuttings 611 can be thusly-formed；By mid-game 6 and impeller location Corresponding matching, blade 1 is inserted Enter in gap, the outer ring 61 of 611 two sides of joint-cutting is pressed to original position using mold, then the outer ring 61 of 611 two sides of joint-cutting is squeezing Effect is lower to occur plastic deformation, is pressed into the connecting hole 11 on blade 1, completes the connection of mid-game 6 and blade 1 and impeller, connection The setting in hole 11 can be further improved the connectivity robustness of blade 1 Yu mid-game 6, correspondingly increase the stabilization during fan operation Property, and reduce the generation of noise.

In the present embodiment, support frame may include the vane 62 of multiple radial settings, rotation direction and the blade 1 of vane 62 Rotation direction is consistent, and distance of the vane 62 away from upper connecting band 2 is greater than the distance away from lower connecting band 3.Vane 62 on 6 support frame of mid-game Air-flow is oriented to, and guide direction is consistent with impeller, to play booster action to impeller, enhances its diversion effect；Into The air-flow for entering impeller tubular inner cavity can be after the auxiliary water conservancy diversion of 6 support frame of the water conservancy diversion of blade 1 and mid-game, going out through blower Air port outflow, installation site of the mid-game 6 on impeller along its axial direction close to it is lower circle 5 (as shown in Fig. 2, 6 outer ring 61 of mid-game away from Be L from upper circle 4, the outer ring 61 of mid-game 6 is H-L, L > H-L apart from lower circle 5, that is, L > H/2), ensure it is auxiliary in front of support frame It helps on the basis of diversion effect, adverse effect of the vortex of support frame rear formation to impeller wind-guiding can be effectively reduced.Tool Body, the difference in height of two sides can be 5~10mm in 62 width direction of vane.

Specifically, mid-game 6 can be fixed at the position for connecting lower connecting band 3 on blade 1 in the present embodiment.That is, such as Shown in Fig. 2, L=H is supported at this point, the front of 6 support frame of mid-game can carry out auxiliary guiding to the air-flow for entering impeller internal The vortex that frame rear is formed is located at the outside of impeller, to be further reduced the vortex of support frame rear formation to impeller Adverse effect improves the wind-guiding ability of blower.

In the present embodiment, it can be matched in the upper connecting band 2 of impeller and be connected with circle 4, upper circle 4 can be ring-type, and its Radial section be it is U-shaped, upper connecting band 2 and the upper folding part 22 are located in the U-type groove 7 that circle 4 is formed.It here is upper circle 4 With a kind of specific connection type of connecting band 2 upper in impeller, i.e., the end of upper connecting band 2 is corresponding to be inserted into the U-type groove 7 for enclosing 4, Then the two side walls riveting of U-type groove 7 is compressed, upper circle 4 is closely coated on to the end of upper connecting band 2；In addition, upper circle 4 By in upper connecting band 2 interconnecting piece and folding part be fixed, can effectively improve the folding fastness of folding part, it is corresponding really Protect the position precision between blade 1.

Similar, in the present embodiment, it is connected with lower circle 5 as shown in figure 3, can match in lower connecting band 3, lower circle 5 can also Think ring-type, and its radial section be it is U-shaped, lower connecting band 3 and lower folding part are located in the U-type groove 7 that lower circle 5 is formed.Lower circle 5 The interconnecting piece and folding part of lower connecting band 3 are fixed, can effectively improve the folding fastness of folding part, it is corresponding true The position precision between blade 1 is protected, lower circle 5 and upper circle 4 are jointly fixed the upper and lower end parts of impeller, improve impeller Relative position fastness between each component, it is ensured that the normal operation of impeller.

Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations； Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: It can still modify to technical solution documented by previous embodiment, or to some or all of the technical features It is equivalently replaced；And these are modified or replaceed, the utility model embodiment that it does not separate the essence of the corresponding technical solution The range of technical solution.

Claims (10)

1. a kind of impeller, which is characterized in that including blade (1) and cricoid upper connecting band (2), lower connecting band (3), the blade (1) to be multiple, multiple blades (1) are all connected between the upper connecting band (2) and the lower connecting band (3), and along institute The circumferential dispersed distribution of connecting band (2) and the lower connecting band (3) is stated, the upper connecting band (2) is equipped with upper folding part (22), the lower connecting band (3) is equipped with lower folding part；The blade (1), the upper connecting band (2) and the lower connecting band (3) it is integrally formed and is made.

2. impeller according to claim 1, which is characterized in that the upper folding part (22) is set to the upper connecting band (2) On, and between the adjacent blade (1) and the tie point of the upper connecting band (2)；

And/or the lower folding part is set on the lower connecting band (3), and is located at the adjacent blade (1) and the lower connection Between the tie point of band (3).

3. impeller according to claim 1, which is characterized in that the upper folding part (22) is curved by the upper connecting band (2) It rolls over, and the upper folding part (22) includes at least one bending body；

And/or the lower folding part is bent by the lower connecting band (3), and the lower folding part includes that at least one is curved Roll over body.

4. impeller according to claim 1, which is characterized in that the tubular inside cavity that multiple blades (1) are formed is solid It is connected to mid-game (6), the mid-game (6) includes that the outer ring (61) of annular and support frame, support frame as described above are connected to the outer ring (61) in ring, and with the outer ring (61) coaxial line；The tubular cavity that the outer ring (61) and the blade (1) are formed is solid It connects.

5. impeller according to claim 4, which is characterized in that be radially equipped on the outer ring (61) outwardly open Joint-cutting (611), the joint-cutting (611) be it is multiple, multiple joint-cuttings (611) along the outer ring (61) circumferential dispersed distribution, The blade (1) matches grafting with the joint-cutting (611) one by one.

6. impeller according to claim 5, which is characterized in that the blade (1) is equipped with connecting hole (11), the blade (1) it is located in the joint-cutting (611), the side wall of the joint-cutting (611) part corresponding with the connecting hole (11) is pressed into institute It states in connecting hole (11).

7. impeller according to claim 4, which is characterized in that support frame as described above includes the vane of multiple radial settings (62), the rotation direction of the vane (62) is consistent with the rotation direction of the blade (1), and the vane (62) is away from the upper connecting band (2) Distance be greater than the distance away from the lower connecting band (3).

8. impeller described in any one of -7 according to claim 1, which is characterized in that the upper connecting band (2) on of the impeller With upper circle (4) is connected with, matching is connected with lower circle (5) on the lower connecting band (3), and the upper circle (4) is cyclic annular, and its radial direction Section be it is U-shaped, it is interior that the upper connecting band (2) and the upper folding part (22) are located in the U-type groove (7) that the upper circle (4) is formed；

And/or the lower circle (5) is ring-type, and its radial section is U-shaped, the lower connecting band (3) and the lower folding part folder In the U-type groove (7) that the lower circle (5) is formed.

9. a kind of blower, which is characterized in that including shell, driving part and impeller of any of claims 1-8, The impeller is installed on the enclosure interior, and the driving end of the driving part and the impeller are affixed, for driving the leaf Wheel is around its axis rotation.

10. a kind of kitchen ventilator, which is characterized in that including cabinet and blower as claimed in claim 9, the cabinet is equipped with smoking Mouth and smoke outlet, the blower are fixedly arranged in the cabinet, and the air inlet of the blower is connected to the smoking port, the wind The air outlet of machine is connected to the smoke outlet.