CN109611351A - A kind of smoke exhaust ventilator of centrifugation/hybrid blower of axis stream and its composition - Google Patents

A kind of smoke exhaust ventilator of centrifugation/hybrid blower of axis stream and its composition Download PDF

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Publication number
CN109611351A
CN109611351A CN201811601989.6A CN201811601989A CN109611351A CN 109611351 A CN109611351 A CN 109611351A CN 201811601989 A CN201811601989 A CN 201811601989A CN 109611351 A CN109611351 A CN 109611351A
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CN
China
Prior art keywords
blower
guide vane
motor
housing
hybrid
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Pending
Application number
CN201811601989.6A
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Chinese (zh)
Inventor
许常悦
吴臣
孙建红
孙智
吕润民
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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Application filed by Nanjing University of Aeronautics and Astronautics filed Critical Nanjing University of Aeronautics and Astronautics
Priority to CN201811601989.6A priority Critical patent/CN109611351A/en
Publication of CN109611351A publication Critical patent/CN109611351A/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00Pumping installations or systems
    • F04D25/02Units comprising pumps and their driving means
    • F04D25/06Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00Pumping installations or systems
    • F04D25/16Combinations of two or more pumps ; Producing two or more separate gas flows
    • F04D25/166Combinations of two or more pumps ; Producing two or more separate gas flows using fans
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/26Rotors specially for elastic fluids
    • F04D29/28Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/40Casings; Connections of working fluid
    • F04D29/403Casings; Connections of working fluid especially adapted for elastic fluid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/40Casings; Connections of working fluid
    • F04D29/42Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4213Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/66Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/70Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/703Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24CDOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00Details
    • F24C15/20Removing cooking fumes
    • F24C15/2035Arrangement or mounting of filters

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Ventilation (AREA)

Abstract

The present invention provides a kind of centrifugation/hybrid blower of axis stream and its smoke exhaust ventilators of composition, and centrifugation/hybrid blower of axis stream includes receded disk impeller, motor, guide vane, motor housing, blower housing and filter septum etc.;It include hybrid blower, oil drain pan, cooking-fume exhausting hood housing and smoke discharging pipe etc. by the smoke exhaust ventilator that the hybrid blower forms.Oil smoke is inhaled into hybrid blower via filter screen, and the grease of larger particles can be filtered, and forms the separation of first time grease.The oil smoke being inhaled into passes through receded disk impeller, under the action of the centrifugal force, forms second of grease separation.It is rectified using guide vane, forms orderly ascending air, reduce aerodynamic noise.For flue gas in the switching process of guide vane, small grease, which is attached, gets off to be formed the separation of last time grease.Grease separation can significantly improve the efficiency of grease separation three times, and flue gas passes through the rectification of guide vane, can reduce aerodynamic noise, and be conducive to the discharge of flue gas, improve the maximum quantity of wind of blower.

Description

A kind of smoke exhaust ventilator of centrifugation/hybrid blower of axis stream and its composition
Technical field
The present invention relates to smoke exhaust ventilator field more particularly to a kind of Wind Volume being made of centrifugation/hybrid blower of axis stream, Low pneumatic noise and the high smoke exhaust ventilator of grease separation rate.
Background technique
Blower belongs to an important component of smoke exhaust ventilator, its performance divides the mist extractor effect and grease of smoke exhaust ventilator There is highly important influence from effect.
The smoke exhaust ventilator of early stage mainly emphasizes mist extractor effect, does not consider grease separation problem, blower is mainly with axis stream Based on fan.Traditional axial fan type smoke exhaust ventilator is the disadvantage is that wind pressure is low, suction is small etc., and the aspiration ranges of oil smoke are only limited to Near aerofoil fan.However, the suction effect of aerofoil fan will become very poor for farther away oil smoke, hardly have Lampblack-pumped ability.Further, since aerofoil fan does not have special grease separating measure, most grease is directly arranged with flue gas Into outside atmosphere, biggish environmental pollution is easily caused.
Different according to the oil smoke suction inlet position of smoke exhaust ventilator, common smoke exhaust ventilator has top suction type, side on market today Suction and downdraft.It should be pointed out which kind of Smoking regime no matter taken, the blower of these smoke exhaust ventilators is that scroll casing type is more Wing centrifugal blower.For fan performance, although scroll casing type multi-wing centrifugal fan pressure coefficient is high, air quantity is relatively small, It is not able to satisfy the smoke pumping requirement of Wind Volume, total pressure efficiency is relatively low.On the other hand, oil smoke is after centrifugal blower is thrown away, grease hair It is estranged to be directly discharged along the smoke outlet of smoke exhaust ventilator from, remaining flue gas.The flue gas thrown away by centrifugal blower is without pneumatic Rectification processing, the unsteady vortex and separation flow dynamic characteristic with height are also easy to produce higher aerodynamic noise.Especially work as smoke extractor When Wind Volume works at full capacity, aerodynamic noise is bigger.The shortcomings that for existing scroll casing type multi-wing centrifugal fan, the invention discloses A kind of centrifugation/hybrid blower of axis stream, the blower can increase air quantity, improve grease separation rate, and can reduce aerodynamic noise.
Summary of the invention
Aiming at the problems existing in the prior art, the object of the present invention is to provide a kind of Wind Volume, low aerodynamic noise and oil The smoke exhaust ventilator of the higher centrifugation of rouge separation rate/hybrid blower of axis stream and its composition.
Technical solution of the present invention are as follows: a kind of centrifugation/hybrid blower of axis stream, by blower housing, motor casing, guide vane, The main components such as motor, receded disk impeller, filter septum and oil sump tank composition.
Above-mentioned receded disk impeller is tubular multiple wing type centrifugal impeller, and impeller and wheel hub baffle are connected.Impeller blade number is desirable It is 60 ~ 80, the interior foreign steamer radius ratio of impellerr 2/r 1It is taken as 0.82 ~ 0.88;Wheel hub baffle is arranged in the top of receded disk impeller, uses In fixed blade and oil smoke is prevented to be directly entered motor.
Above-mentioned guide vane is installed tightly between motor housing and blower housing inner sidewall, by several wings or double arc wings The blade of blade profile is constituted, and the parameter of these aerofoil profiles can be in optimized selection according to Numerical Simulation Results or fluid experiment.Electricity Channel between machine shell and blower housing inner sidewall is airflow design, to reduce the flow resistance of oil smoke, and then increases blower Air quantity;Guide vane number and the receded disk impeller number of blade are relatively prime, and guide vane number is no more than 20, if it exceeds 20 may Block runner;The established angle (angle of guide vane and vertical direction) of guide vane is not more than 45 °, a kind of simple established angle It can be taken as 0o
Above-mentioned filter septum and blower housing close installation, including filter screen, deflector hole and partition.Above filter septum with Receded disk impeller keeps lesser installation gap, to guarantee preferable oil separation effect;Deflector hole be circumferentially edge etc. Spacing aperture, shape can be semicircle orifice, but not limited to this shape;It is mounted on the filter septum circle of blower housing inner sidewall Shape edge is slight curving downwards, in order to which the grease separated successfully can instill oil sump tank below from deflector hole.
Above-mentioned oil sump tank is dismountable hollow cylinder type.Hollow channel is the fans entrance of inverted tubaeform, is convenient for oil smoke Accelerated sucking receded disk impeller;Oil sump tank is equipped with valve, convenient for bleeding off the grease in oil sump tank.
The present invention also provides a kind of smoke exhaust ventilators being made of centrifugation/hybrid blower of axis stream, including oil drain pan, oil pumping Smoke machine shell, the centrifugation/main components such as the hybrid blower of axis stream and smoke discharging pipe.Wherein, smoke discharging pipe and fan outlet are direct Connection, the shell shape of smoke exhaust ventilator can carry out design for aesthetic appropriate or be customized according to user preferences.
Advantageous effects of the invention: the pumping of centrifugation provided by the invention/hybrid blower of axis stream and its composition Kitchen ventilator improves air quantity in the case where guaranteeing maximum wind pressure;Meanwhile oil smoke is inhaled into centrifugation/axis stream via filter screen and mixes The grease of box-like blower, larger particles can be filtered, and form the separation of first time grease.The oil smoke being inhaled into passes through centrifugal leaf Wheel, under the action of the centrifugal force, grease collide and are adhered to the inner sidewall of blower housing, form second of grease separation.Second Flue gas after grease separation forms orderly ascending air by the rectification of guide vane, and then reduces pneumatically making an uproar for air-flow Sound.In addition, flue gas, in the switching process of guide vane, small grease therein can be attached, last time oil is formed Rouge separation.Grease separation can significantly improve the efficiency of grease separation three times;Flue gas passes through the rectification of guide vane, can reduce pneumatic Noise, and be conducive to the discharge of flue gas, improve the maximum quantity of wind of blower.
Detailed description of the invention
Fig. 1 is centrifugation/axis stream hybrid blower structural schematic diagram;
Fig. 2 is the range hood structure schematic diagram being made of centrifugation/hybrid blower of axis stream;
Fig. 3 is the structural schematic diagram of filter septum;
Fig. 4 is the tomograph of guide vane;
Fig. 5 is the tomograph of receded disk impeller;
Fig. 6 is scroll casing type centrifugal blower and centrifugation/axis stream hybrid blower static pressure and air quantity graph of relation;
Fig. 7 is valve structure schematic diagram.
Label title in figure: 1, fans entrance, 2, valve, 3, oil sump tank, 4, filter septum, 5, receded disk impeller, 6, Motor, 7, guide vane, 8, motor housing, 9, blower housing, 10, fan outlet, 11, oil drain pan, 12, cooking-fume exhausting hood housing, 13, centrifugation/hybrid blower of axis stream, 14, pipeline, 15, deflector hole, 16, partition, 17, filter screen, 18, adjusting knob, 19, valve Body.
Specific embodiment
The invention discloses a kind of centrifugation/hybrid blower of axis stream and its smoke exhaust ventilators of composition.To make mesh of the invention , technical solution and effect be more clear and define, the present invention referring to attached drawing, to the course of work of blower and smoke exhaust ventilator make into One step is described in detail.It should be appreciated that specific implementation described herein is not used to limit this hair only to explain the present invention It is bright.
Embodiment 1
As shown in Figure 1, a kind of centrifugation provided by the invention/hybrid blower of axis stream includes filter septum 4, receded disk impeller 5, electricity Machine 6, guide vane 7;Wherein,
The motor 6 is located at blower middle position, and the output end of motor 6 is connected on receded disk impeller 5, makes the centrifugal leaf 5 rotation of wheel;
In the outside of motor 6, guide vane 7 is installed, the guide vane 7 and motor 6 are concentric;
The hybrid blower further includes fans entrance 1, and the fans entrance 1 is set to one end of blower housing 9, is taper, Filter septum 4 is equipped in the upper limb of the fans entrance 1;It is fan outlet 10 in the other end of the blower housing 9;
The structure that the receded disk impeller 5, motor 6, guide vane 7 form is fixed in the blower housing 9.
Further, as shown in figure 4, the receded disk impeller 5, motor 6 and guide vane 7 are co-axially mounted, the motor 6 Outside is equipped with motor housing 8, is formed in air duct between the motor housing 8 and blower housing 9.
The guide vane 7 is installed tightly in the air duct between motor housing 8 and blower housing 9, the water conservancy diversion Blade 7 is that several blades are equidistant, is connected by screw bolts between guide vane and shell, in air duct, circularizes structure, It is centered around outside motor housing 8.
The guide vane 7 uses wing or double arc winged petiole types, and guide vane number and fan impeller blade number are relatively prime, water conservancy diversion The number of blade is no more than 20;The established angle of guide vane 7 is not more than 45 °.
As shown in figure 5, the receded disk impeller 5 includes baffle and the circumferential impeller blade that baffle is arranged in, the baffle It is connected at center on the output end of the motor 6, is used to fix impeller blade and oil smoke is prevented to be directly entered motor;
The impeller blade number is 60 ~ 80, the interior foreign steamer radius ratio of the receded disk impeller 5r 2/r 1It is taken as 0.82 ~ 0.88.
As shown in figure 3, the filter septum 4 includes deflector hole 15, partition 16 and filter screen 17;Wherein,
The edge and 9 close installation of blower housing of the filter septum 4, edge are bent downwardly, under top and receded disk impeller 5 It is intermarginal to have gap;
The deflector hole 15 circumferentially equidistant aperture in edge, the filter screen 17 are set to the middle position of filter septum 4, institute The aperture for stating filter screen 17 is uniformly distributed.
The outside of the fans entrance 1 is equipped with a circle oil sump tank 3;The cabinet of the oil sump tank 3 is with blower housing 9 same In face;The oil sump tank 3 is hollow cylinder type, is mounted on the blower housing, and the oil sump tank 3 is installed There is valve 2, convenient for bleeding off the grease in oil sump tank.
The valve 2 is made of valve body 19 and adjusting knob 18, and 19 left end of valve body is welded on blower housing 9;Valve body with Perpendicular plays certain guide functions at 45-60 degree angle.Adjusting knob 18 can manually adjust.
Embodiment 2
The present invention also provides the smoke exhaust ventilators using the hybrid blower composition of above-mentioned centrifugation/axis stream, as shown in Fig. 2, the oil pumping Smoke machine includes oil drain pan 11, cooking-fume exhausting hood housing 12, the hybrid blower 13 of centrifugation/axis stream and smoke discharging pipe 14;Wherein, the row Smoke pipeline 14 is directly connected to fan outlet 10, and cooking-fume exhausting hood housing 11 is installed on outside hybrid blower, with 9 phase of blower housing Even, inner sidewall is streamlined.
As depicted in figs. 1 and 2, curve with the arrow is the motion profile profile of oil smoke.Here it is being pumped with oil smoke Motion process in smoke machine is reference, discusses blower and the smoke exhaust ventilator course of work disclosed by the invention.
The high speed rotation of receded disk impeller 5 can be formed about biggish negative pressuren zone in fans entrance 1, and oil smoke is in inside and outside differential pressure Blower is inhaled under effect.When oil smoke passes through filter screen 17, the grease of larger particles be can be filtered, and form first time grease Separation.The grease filtered out instills oil drain pan 11 under the effect of gravity.Remaining oil smoke passes through receded disk impeller 5, in centrifugal force Effect of inertia under, grease collides the inner sidewall of blower housing 9 and is adhered to, and forms the separation of second grease.Second The grease separated instills oil sump tank 3 under the effect of gravity, by the deflector hole 15 of filter septum 4.It should be noted that the Secondary grease separation is most important grease separation phase, can complete most grease separation;Oil sump tank has biggish Grease ability is collected, when grease is more than warning capacity height, can be given a warning by sound or LED flash, remind and use Family cleaning oil sump tank is bled off grease by valve 2.
It is essentially flue gas by the oil smoke of receded disk impeller 5, fat content therein is very small.It is got rid of by receded disk impeller 5 Flue gas out, the characteristics of motion is disorderly and unsystematic, and there are biggish vortex separation characteristics.Flue gas moves upwards, by guide vane 7 Rectification, will form orderly ascending air, and then reduce the aerodynamic noise of flue gas.In addition, rectification of the flue gas in guide vane 7 In the process, small grease therein can be collided again on blade and be adhered to, and form the separation of last time grease.Adherency Grease can instill oil sump tank 3 through deflector hole 15 under the effect of gravity.Flue gas through over commutation is under the inside and outside differential pressure effect of blower The flue of building is discharged into along pipeline 14.
Oil smoke is inhaled into centrifugation/hybrid blower of axis stream via filter screen, and the grease of larger particles can be filtered, and is formed The separation of first time grease.The oil smoke being inhaled into passes through receded disk impeller, and under the action of the centrifugal force, grease collides and is adhered to blower The inner sidewall of shell forms second of grease separation.Flue gas after second of grease separation, by the rectification of guide vane, shape At orderly ascending air, and then reduce the aerodynamic noise of air-flow.In addition, flue gas is in the switching process of guide vane, wherein Small grease can be attached, formed last time grease separation.Grease separation can significantly improve grease separation three times Efficiency, flue gas pass through the rectification of guide vane, can reduce aerodynamic noise, and be conducive to the discharge of flue gas, improve the maximum of blower Air quantity.
In order to illustrate centrifugation/axis stream hybrid blower working performance, Fig. 6 gives centrifugation provided by the invention/axis stream The static pressure and air quantity relationship correlation curve of hybrid blower and conventional volute formula centrifugal blower.For the ease of comparison, two kinds of blowers Impeller diameter it is identical.Under identical air quantity, compared with scroll casing type centrifugal blower, centrifugation/axis stream hybrid blower static pressure is omited It is small.However, centrifugation/axis stream hybrid blower working performance curve is more gentle, maximum quantity of wind is larger, and working region is quiet Pressure value can satisfy the requirement of smoke exhaust ventilator.It should be noted that under identical air quantity operating condition, the centrifugation/hybrid blower of axis stream Efficiency be greater than scroll casing type centrifugal fan, maximal efficiency can be improved about 15% ~ 30%.
Thinking and method of the invention, there are many method and the approach for implementing the technical solution, and the above is only the present invention Preferred embodiment, it is noted that for those skilled in the art, do not departing from the principle of the invention Under the premise of, several improvements and modifications can also be made, these modifications and embellishments should also be considered as the scope of protection of the present invention.This implementation The available prior art of each component part being not known in example is realized.

Claims (7)

1. a kind of centrifugation/hybrid blower of axis stream, which is characterized in that the hybrid blower includes filter septum (4), centrifugal Impeller (5), motor (6), guide vane (7);Wherein,
The motor (6) is located at blower middle position, and the output end of motor (6) is connected on receded disk impeller (5), make it is described from Core type impeller (5) rotation;
It in the outside of motor (6), is equipped with guide vane (7), the guide vane (7) and motor (6) are concentric;
The hybrid blower further includes fans entrance (1), and the fans entrance (1) is set to one end of blower housing (9), is Taper is equipped with filter septum (4) in the upper limb of the fans entrance (1);It is wind in the other end of the blower housing (9) Machine exports (10);
The structure that the receded disk impeller (5), motor (6), guide vane (7) form is fixed in the blower housing (9).
2. the centrifugation according to claim 1/hybrid blower of axis stream, it is characterised in that: the receded disk impeller (5), electricity Machine (6) and guide vane (7) are co-axially mounted, and motor housing (8), the motor housing (8) and wind are equipped with outside the motor (6) It is formed in air duct between machine shell (9);
The guide vane (7) is installed tightly in the air duct between motor housing (8) and blower housing (9), described to lead Flowing blade (7) is that several blades are equidistant, and guide vane is connected by screw bolts with shell, in air duct, circularizes structure, It is centered around motor housing (8) outside.
3. the centrifugation according to claim 2/hybrid blower of axis stream, it is characterised in that: the guide vane (7) uses machine The wing or double arc winged petiole types, guide vane number and fan impeller blade number are relatively prime, and guide vane number is no more than 20;Guide vane (7) established angle is not more than 45 °.
4. the centrifugation according to claim 1/hybrid blower of axis stream, it is characterised in that: the receded disk impeller (5) includes The impeller blade of baffle is arranged in baffle and circumferential direction, is connected on the output end of the motor (6), uses at the baffle center In fixed impeller blade and oil smoke is prevented to be directly entered motor;
The impeller blade number is 60 ~ 80, the interior foreign steamer radius ratio of the receded disk impeller (5)r 2/r 1It is taken as 0.82 ~ 0.88.
5. the centrifugation according to claim 1/hybrid blower of axis stream, it is characterised in that: the filter septum (4) includes leading Discharge orifice (15), partition (16) and filter screen (17);Wherein,
The edge and blower housing (9) close installation of the filter septum (4), edge are bent downwardly, top and centrifugal leaf It is intermarginal under wheel (5) to have gap;
Deflector hole (15) the circumferentially equidistant aperture in edge, the filter screen (17) are set to the centre of filter septum (4) The aperture of position, the filter screen (17) is uniformly distributed.
6. the centrifugation according to claim 1/hybrid blower of axis stream, it is characterised in that: the outside of the fans entrance (1) Equipped with circle oil sump tank (9), in the same face, the oil sump tank (3) is for the cabinet of the oil sump tank (9) and blower housing (9) Hollow cylinder type is mounted on the blower housing, and the oil sump tank (3) is equipped with valve (2), convenient for putting Fall the grease in oil sump tank (9);
The valve (2) is made of valve body (19) and adjusting knob (18), and valve body (19) left end is welded on blower housing (9); The valve body downwards certain angle, so that grease flows out naturally under the effect of gravity from oil sump tank (9), adjusting knob (18) it is installed on the valve body, manually adjusts.
7. a kind of smoke exhaust ventilator being made of centrifugation/hybrid blower of axis stream, it is characterised in that: the smoke exhaust ventilator includes connecing oil Disk (11), cooking-fume exhausting hood housing (12), centrifugation/hybrid blower of axis stream (13) and smoke discharging pipe (14);Wherein, the smoke exhaust pipe Road (14) is directly connected to fan outlet (10), and cooking-fume exhausting hood housing (11) is installed on outside hybrid blower, with blower housing (9) it is connected, inner sidewall is streamlined.
CN201811601989.6A 2018-12-26 2018-12-26 A kind of smoke exhaust ventilator of centrifugation/hybrid blower of axis stream and its composition Pending CN109611351A (en)

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CN112177974A (en) * 2020-10-27 2021-01-05 德州明联空调设备有限公司 Centrifugal impeller of direct current cylinder and fan

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Application publication date: 20190412