CN105194778B - A kind of fan assembly - Google Patents

Abstract

A kind of fan assembly, including：Vortex cabin (298), dividing plate (303), blower fan cabin (306), noise elimination cabin (313) and closure (315), vortex cabin (298) have air flow inlet (293), spiral duct (336 and 337) and basic circle center；Vortex cabin (298) is linked together by dividing plate (303) with blower fan cabin (306), the basic circle center in the central aperture vortex cabin (298) of dividing plate (303)；Blower fan (16) is placed with blower fan cabin (306), blower fan (16) has air inlet (353), first row gas port (326) and second exhaust port (295)；The resistant noise elimination air flue in noise elimination cabin (313), semicircle air flue (346), special-shaped passage (345) and mounting hole (320), the complete air flue connection first row gas port (326) and abnormity passage (345) of two semicircle air flue (346,308) compositions, and then connected and the mounting hole (320) connection with the reactive muffling air flue；The front of closure (315) sealing noise elimination cabin (313).Fan assembly noise proposed by the present invention is small.

Description

A kind of fan assembly

Technical field

Equipment is generated the present invention relates to negative pressure, more specifically, is related to a kind of fan assembly.

Background technology

For because of the respiratory failure caused by a variety of causes including Respiratory Distress Syndrome(RDS) (ARDS), severe acute edema with the lung involved Patient in swollen and asthma, respiratory insufficiency and major operation, lung ventilator is necessary important life support equipment.For upper The patient of lung ventilator, the timely and effective removing of sputum is critically important, if phlegm is discharged not in time in respiratory tract, dense phlegm and phlegm Scab is easily assembled and blocks bronchus tube chamber, has a strong impact on the ventilatory function of patient, aggravates respiratory failure, or even cause Secondary cases lung Do not open.The hotbed of sputum or bacterial reproduction, bacterium causes infection to patient respiratory organ, patient is easy to Ventilator-associated Pneumonia (VAP).But, ventilated patients are because losing cough function, the original such as PFT slump of disastrous proportions, breathing myasthenia Cause, patient tends not to voluntarily expectoration, and secretion is dramatically increased；In addition, being in the disturbance of consciousness ventilated patients, whole body declines more State is exhausted, the reduction of coughing up of sputum function aggravates original respiratory disease and respiratory failure；Trachea cannula and tracheotomy Bottleneck throat natural cover is destroyed, weakens the cleaning action of air flue cilium, weakens cough, the reflex mechanism of expectoration.Therefore, for For ventilated patients, the sputum of dispelling of continuous and effective is prevention airway obstruction, maintains the key of mechanical ventilation.

Conventional suction sputum mode is sputum aspirator tube suction sputum, and it is to pass through trachea cannula or tracheotomy with a tiny conduit Pipe, inserts the air flue of patient, by vacuum suction lasting in tiny conduit, sputum is suctioned out from the patient.When conduit with When secretion is close, secretion is sucked away.But the shortcoming of this inhaling-conveying mode is also apparent, it is a kind of intrusive mood first Suction sputum, due to the insertion and movement of conduit, even air flue scar is easily damaged to air flue increases the production of airway secretions It is raw, phlegm is inhaled more and more.Meanwhile, aggravate hypoxemia, it is impossible to remove the danger of sputum, increase infection and bleeding immediately.For It is very painful experience for most patient.

Another method that ventilated patients airway secretions are removed is to use common expectoration machine, and such as Philip is public The coughassist of department, it is in expectoration, first, and then the lung suction of patient quickly dashes forward close to the air of maximum tidal volume The air for sucking intrapulmonary so is breathed out with flank speed, because air is breathed out with high speed from patient's intrapulmonary, air-flow is by energy Carrying secretion is up, and is flowed out out of patient airway with very high flow velocity, so as to reach the purpose for removing patient's secretion. It is substantially a kind of mode for simulating expectoration that it, which removes secretion, and this expectoration machine can pass through trachea cannula, trachea cutting-pipe or face Cover is with patient airway connection.This expectoration mode should be well more many than foregoing sputum aspirator tube suction sputum, first, and it, which is that one kind is non-, invades Enter formula suction sputum.Secondly, what expectoration machine was produced is the high velocity air flowed in the whole airway diameter of patient, length range, therefore It can play a part of removing secretion from whole air flue.And sputum aspirator tube suction sputum is the low speed produced in tiny catheter interior Air-flow, secondly as the limitation of suction sputum pipe size, sputum aspirator tube can only be close to larger air flue, and for those small more stages Branching airways, then it is helpless.Also the bronchial branch shape of patient or so, determines sputum aspirator tube in insertion patient's branch gas During pipe suction sputum, the air flue on the right of insertion is typically only capable to, the air flue on the left side can not suction sputum.In suction sputum, patient respiration road it is exhausted big Part with sputum aspirator tube and does not attract air flow contacts, and a little sputum can only be absorbed near sputum aspirator tube.And expectoration machine expectoration, point Secretion is integrally removed by the air-flow in patient airway.

But, expectoration machine also has shortcoming, for example, it is necessary to cut off lung ventilator and patient during to ventilated patients expectoration Vent line, expectoration machine is connected with patient could perform expectoration operation.But for the upper ventilated patients of lung ventilator, Especially for urgent patient, continually cutting off the vent line of lung ventilator and patient may cause that sb.'s illness took a turn for the worse.Expectoration machine is adopted Stop patient's expiratory phase with loop cycle, it may bring some problems, because for ventilation patient, volume circulation Or flow circulation pattern is safer, more effective.In addition, expectoration machine does not have end-expiratory positive pressure function (PEEP), it is in expectoration Pressure in latter end air flue can only be approximately equal to atmospheric pressure.And end-expiratory positive pressure is in treatment Respiratory Distress Syndrome(RDS) ARDS, non-heart source Played an important role when property pulmonary edema, empsyxis, while sputum clearance can be promoted.And expectoration machine is not for above-mentioned symptom patient Applicable, in addition, expectoration machine does not have the warning system provisioned in life support equipment, the security used can not also be protected Card.

Conventional expectoration machine expectoration either air-breathing or expectoration, is all to use same pipeline, air-flow bag during expectoration Secretion containing patient, these secretion may contain a large amount of bacteriums, and the accumulation of these secretion is exposed in tracheae, inhaled with patient Gas air-flow is contacted repeatedly, and the risk of superinfection is brought to patient.

Further, the air-breathing of expectoration machine and expectoration all use blower fan when same blower fan, air-breathing and expectoration to face directly and may contain The air-flow and sputum of bacterium, such as different patients potentially reduce service life and the increasing of blower fan using same expectoration machine The risk of cross-infection between different patients is added.

Patent WO2007054829 proposes a kind of and lung ventilator associated working, and auxiliary patient respiration, cough remove patient The expectoration machine of airway secretions, it is with Philip coughassist difference：The source of the gas of positive airway pressure is carried out to patient not The blower fan inside expectoration machine is reused, but uses the lung ventilator to patient's mechanical ventilation.The breathing and expectoration of patient be not using Same pipeline, is respectively equipped with switch valve in breathing pipeline and expectoration pipeline, when lung ventilator bio-occlusion patient ventilating, is located at breathing Switch valve on pipeline is to open, and the switch valve on expectoration pipeline is closed.When patient's air-breathing terminates, Ji Jiangjin Enter to exhale state when, the valve on expectoration pipeline is opened, and expectoration machine starts expectoration.After expectoration terminates, the valve on expectoration pipeline Close, the valve on breathing pipeline is opened, patient enters suction condition, circulated according to this.

Compared with the coughassist expectoration machines of Philip, the company of need not be dismantled when performing suction sputum patient and lung ventilator Road is taken over, therefore, patient will not interrupt respirator treatment, particularly with needs by giving the lung ventilator PEEP patients for the treatment of, faced When interruption be even more unfavorable, and PEEP is more beneficial for expectoration.Simultaneously as Philip expectoration machine needs to dismantle lung ventilator Energy expectoration, therefore, can only can not immediately be removed every certain phase ability expectoration, sputum.And patent WO2007054829 is not due to There is the problem of lung ventilator is torn in expectoration open, therefore, it can at any time, instant expectoration.Patient's air-breathing and expectoration use different pipelines, drop The low risk of patient's superinfection, is respectively adopted negative inside lung ventilator and expectoration machine to patient's positive airway pressure and negative pressure expectoration Pressure fan, it is to avoid the cross-infection between patient, improves service life of fan.

But WO2007054829 inventions still have many problems in force, such as noise is excessive, radiates bad, is coughing The work of lung ventilator can be influenceed during phlegm or even is alarmed, noise is big etc..

One core component of expectoration machine is blower fan, and high-decibel rotational noise and eddy current crack can be produced during blower fan work, Noise can reach 75-90dB.Moreover, expectoration machine is generally used under ward environment, will certainly be to patient if noise is excessive Rest, sleep, mood impact, or even have influence on the state of an illness.

The content of the invention

The problem of existing for above-mentioned prior art, the present invention proposes a kind of fan assembly, including：Vortex cabin, dividing plate, wind Cabin, noise elimination cabin and closure, wherein,

Vortex cabin has air flow inlet, spiral duct and basic circle center, and spiral duct connects the air flow inlet and described Basic circle center；

Vortex cabin is linked together by dividing plate with blower fan cabin, and dividing plate has centre bore, and the central aperture of dividing plate is vortexed The basic circle center in cabin；

Blower fan is placed with blower fan cabin, there is annular space between blower fan and blower fan cabin；Blower fan has air inlet, first row Gas port and second exhaust port；Air inlet is directed at the centre bore of dividing plate；Blower fan cabin also includes semicircle air flue, a termination of semicircle air flue Lead to the first row gas port of blower fan；

The front in noise elimination cabin is provided with reactive muffling air flue, and the noise elimination cabin back side is provided with semicircle air flue, and noise elimination cabin has abnormity logical Stomata and mounting hole, the semicircle air flue in noise elimination cabin constitute a complete air flue with the semicircle air flue in blower fan cabin；It is described complete The first row gas port of air flue connection blower fan and with special-shaped passage, pass through the special-shaped passage and the reactive muffling air flue and connect It is logical, and then connected with the mounting hole；

The front in seal cap sealing noise elimination cabin.

The fan assembly of the present invention propose can vibration damping, the measure of noise reduction, make diversified forms, frequency that blower fan produces Noise, which is dropped to, meets relevant criterion.

Brief description of the drawings

Fig. 1 for the present invention fan assembly from the structure decomposition figure in terms of positive angle.

Fig. 2 for Fig. 1 fan assembly from the structure decomposition figure in terms of back angle.

Fig. 3 is the sectional view after Fig. 1 fan assembly assembling.

Fig. 4 is the structure decomposition figure for the lower cover component being engaged with fan assembly.

Fig. 5 is the top view of the lower cover component in Fig. 4, is flowed to which show internal gas during work.

Fig. 6 is the stereogram after the lower cover component assembling in Fig. 1 fan assembly and Fig. 4.

Fig. 7 be Fig. 6 in vibration damper plate stereogram.

Fig. 8 is a part of sectional view of the vibration damper plate in Fig. 7.

Embodiment

Embodiments of the present invention are described with reference to the accompanying drawings, wherein identical part is presented with like reference characters.

Fig. 1-3 shows the decomposing schematic representation and partial sectional view of the blower fan of the present invention.The fan assembly 180 of the present invention is wrapped Include：Vortex cabin 298, dividing plate 303, blower fan cabin 306, noise elimination cabin 313 and closure 315.

Vortex cabin 298 is linked together by dividing plate 303 with blower fan cabin 306.Therefore, dividing plate 303 and vortex cabin 298 are just tight It is closely connected to be combined, form the airintake wind-tunnel of blower fan 16, it is characterized in that using spiral of Archimedes or log spiral, etc. The basic circle center of circle of side baseline or inequilateral baseline, gas outlet and spiral of Archimedes is overlapped, and meets fluid flow characteristics, has The advantages of air-flow is steady, air loss is small.Preferably, the one side contacted in dividing plate 303 with vortex cabin 298, posts bubble silk floss, and bubble is continuous (not shown) has the effect of sound absorption and sealing.

Vortex cabin 298 has air flow inlet 293, spiral duct 336 and 337, basic circle center.Air flow inlet 293 is arranged on On the bulkhead of vortex cabin side.Basic circle is centrally disposed in the center in vortex cabin 298.Spiral duct 336 connects the gas with 337 one end Inflow entrance 293, other end connection basic circle center.Spiral duct is by the space bar of multiple arc-shapeds in the interior separations of vortex cabin 298 Form.

Dividing plate 303 has centre bore, the basic circle center in the central aperture vortex cabin 298 of dividing plate 303.

Blower fan 16 is placed with blower fan cabin 306, there is annular space 360 between blower fan 16 and blower fan cabin 306.Blower fan 16 has There are air inlet 353, first row gas port 326 and second exhaust port 295.Air inlet 353 is directed at the centre bore of dividing plate 303, first row Gas port 326 and second exhaust port 295 are all disposed within the side wall in blower fan cabin 306, and are distributed in relative both sides.Blower fan cabin 306 Also include banana-shaped semicircle air flue 308.Dividing plate and wind that banana-shaped semicircle air flue 308 is moved towards by the banana-shaped in blower fan cabin 306 The side wall of cabin 306 is formed.One end of the similar banana stem of banana-shaped semicircle air flue 308 is switched to the first row gas port of blower fan 16 326。

Blower fan is arranged provided with 3 grades of reactive muffling air flues (Fig. 1) in the front (the dorsad one side in blower fan cabin 306) in noise elimination cabin 313 The high-frequency noise of gas noise carries out noise reduction, why can only eliminate high-frequency noise, this is due to the muffler space ratio in noise elimination cabin 313 It is smaller, and frequency of noise elimination is determined by the length of expansion chambers.There is a perfume (or spice) at the back side of noise elimination cabin 313 (one side in connecting fan cabin 306) Any of several broadleaf plants shape semicircle air flue 346 (Fig. 2), noise elimination cabin 313 has special-shaped passage 345, mounting hole 320 and positioned at positive 3 grades of resistances Eliminate the noise out of my cabin on noise elimination air flue (arrow 312,321,319 indicates the trend of gas in air flue), 3 grades of reactive muffling air flues edge Enclose inside traveling.Banana-shaped semicircle air flue 346 constitutes a complete banana air flue with banana-shaped semicircle air flue 308.Banana-shaped One end of the similar banana stem of semicircle air flue 346 is communicated with the first row gas port 326 of blower fan 16, the other end and special-shaped passage 345 Connection, special-shaped passage 345 is connected with described positioned at positive noise elimination air flue.The other end positioned at positive noise elimination air flue Connected with mounting hole 320.

Fastening, gluing, the banana-shaped semicircle gas at the back side of noise elimination cabin 313 during assembling by noise elimination cabin 313 with blower fan cabin 306 Road 346 (Fig. 2) has constituted jointly the exhaust passage of blower fan 16 with the banana-shaped semicircle air flue 308 (Fig. 1) on blower fan cabin 306, should The entrance of exhaust passage and the first row gas port 326 of blower fan 16 align, and the gas discharged during blower fan work will go first through this and lead to Road.

313 positive 3 grades of noise elimination cabin reactive muffling air flue fits together with closure 315, it is ensured that between each air flue not Mutually leakage, realizes the effect eliminated the noise.

It is noted that not only 3 grades of reactive muffling air flues inside noise elimination cabin 313 play noise elimination to the exhaust noise of blower fan Effect, meanwhile, when gas flows to the ring between the larger blower fan 16 of latus rectum and blower fan cabin 306 from the less mounting hole 320 of latus rectum Shape space 360 (see Fig. 3), then the second exhaust port 295 that latus rectum diminishes is flowed to from the annular space 360, substantially also play The effect of reactive muffling, meanwhile, the exhaust noise, because the noise that vibration is produced mutually suppresses, further reduces noise with blower fan.

Preferably, the sealing between the center external cylindrical surface of closure 315 and the interior centre bore in noise elimination cabin 313, is to rely on O Type circle 314.Specifically, O-ring 314 is placed in the annular groove 318 of the center external cylindrical surface of closure 315, when closure 315 During the interior centre bore in external cylindrical surface insertion noise elimination cabin 313, O-ring 314 can produce elastomeric radial, so as to realize sealing.

During assembling, the center external cylindrical surface gap of closure 315 coordinates in the interior centre bore in insertion noise elimination cabin 313, (figure 3), then by screw 316 through the mounting hole 317 on closure 315, it is connected with the screwed hole 322 on noise elimination cabin 313, it is complete Into being fitted and connected for closure 315 and noise elimination cabin 313, the sealing of 3 grades of reactive muffling air flues in noise elimination cabin 313 is realized.

Preferably, fan assembly 180 of the invention also includes special-shaped elastomer 305, and blower fan 16 can be placed on abnormity In elastomer 305, special-shaped elastomer 305 is molded according to the profile of blower fan 16, by rubber or polyurethane into can be connect with blower fan 16 Contacting surface is fitted well.Medium-high frequency is in because blower fan 16 vibrates the noise produced, the rubber elastomer intrinsic frequency is higher than bullet Spring, can effectively reduce vibration damping and reduce high-frequency noises.

Centre bore of the centre bore 333 of dividing plate 303 not only with special-shaped elastomer 305 aligns, its center also with Archimedes The basic circle center of circle in helix air channel is overlapped, and forms the gas outlet in vortex cabin 298.It is close between vortex cabin 298 and blower fan cabin 306 Envelope relies on O-ring 329, specifically, and O-ring 329 is arranged in the groove 300 on vortex cabin 298, passes through 339 pairs of vortexs of screw Cabin 298 is axially fastened with blower fan cabin 305, O-ring 329 is compressed deformation, is realized sealing.

The centre bore of special-shaped elastomer 305 is communicated with the air inlet 353 of blower fan 16, specifically, on special-shaped elastomer 305 Outside cylinder 331 is inserted with interference fit in the air inlet 353 of blower fan, completes gas circuit connection and sealing (Fig. 3).2 screws 324, through the mounting hole 325 on blower fan 16, are connected with the built-in metal screwed hole 328 on special-shaped elastomer, fix blower fan 16 On special-shaped elastomer 305, and surrounded by special-shaped elastomer 305, support.The other end outside cylinder 354 of elastomer 305 is also with mistake The mode of cooperation of being full of is inserted in the circular hole 333 of dividing plate 303, and the one side of dividing plate 303 is fitted with the bottom surface of special-shaped elastomer 305 Together, by 4 sunk screws 302 through the counter sink 304 on dividing plate 303, the pre-buried gold with the special-shaped bottom surface of elastomer 305 Category screwed hole 341 is connected, and blower fan 16, special-shaped elastomer 305 are fixed on dividing plate 303.This 3 parts again with blower fan cabin 306 It is fixed together, specifically, by 3 sunk screws 301 through the counter sink 332 on dividing plate 303, and on blower fan cabin 306 Built-in metal screwed hole 352 is connected.And screw 339 passes through the upper installing hole 299 of vortex cabin 298, with the upper screwed hole of blower fan cabin 306 344 connections, make vortex cabin 298 be linked together with blower fan cabin 306.

After expectoration machine is started working, the gas (arrow 338, see Fig. 1) that patient's intrapulmonary is extracted out enters by air flow inlet 293 Enter fan assembly 180 (specifically into vortex cabin 298), along helix duct flows (arrow 337,336), from spiral The basic circle center outflow (arrow 335) in line air channel, through the centre bore 333 (arrow 334) of dividing plate 303.Special-shaped elastomer 305 Centre bore (arrow 330), (arrow 327) is flowed out into the air inlet 353 of blower fan 16, then from the first row gas port 326 of blower fan 16, Flow into banana-shaped semicircle air flue 308 and 346 to fasten in the banana-shaped air flue of bonding, the banana-shaped air flue and noise elimination cabin 313 3 grades of reactive muffling passages above are connected by special-shaped passage 345.Therefore gas passes through special-shaped passage from banana-shaped air flue 345 flow to 3 grades of reactive muffling passages (arrow 309,356) on noise elimination cabin 313, by 3 grades of reactive muffling passages (arrow 312, 321st, after 319) eliminating the noise, blower fan cabin 306 (arrow 311,310) is flowed to from mounting hole 320, the heat-delivery surface 323 of blower fan 16 is blown Sweep and be split (arrow 357,364 in Fig. 3), blower fan 16 is radiated.Gas after shunting continues on blower fan 16 and wind Annular space 360 between cabin 306 flows downward (arrow 363,362 in Fig. 3, arrow 358,359), in second exhaust port 295 positions, shunting Hou Ji road air-flows (arrow 361,342,343) converge to (arrow 307) together again, from the second of general mood 16 Exhaust outlet 295 is discharged.

It is generally noted above, because the muffler space in noise elimination cabin 313 is smaller, high-frequency noise can only be eliminated.And general mood is vented The existing medium-high frequency of noise, also have low frequency, in order to eliminate Middle and low frequency noise, it is necessary to larger muffler space.The blower fan of the present invention Component also includes lower cover component 30.Vortex cabin 298, dividing plate 303, blower fan cabin 306, noise elimination cabin 313 are laid in lower cover component 30 With closure 315.

The gas flow lower cover component 30 discharged from the second exhaust port 295 of blower fan 16.

Further, the operation of fan assembly 180 needs fan drive circuit plate 351 to control.Referring to Fig. 2, blower fan driving electricity Road plate 351 is by 4 screws 348, the spiral shell through on packing ring 349, the mounting hole 350 of itself, with blower fan cabin 306, noise elimination cabin 313 Pit 347 is connected, and is fixed on fan assembly 180.The leaded (not shown) of fan drive circuit plate 351 and internal blower fan 16 Connection.

Further, the fan assembly 180 assembled (preferably, can add caoutchouc elasticity by screwed hole 340 with screw Beam and packing ring) it is fixed on vibration damper plate 282 (see Fig. 6-8).

Fig. 4 is the structure decomposition figure of lower cover component 30.

Lower cover component 30 is fixed except playing support to each part of fan assembly, is undertaken outside the function of equipment base, substantially Also act as noise elimination effect.After the gas that blower fan 16 is discharged carries out high frequency noise elimination by blower fan cabin 306 and noise elimination cabin 313, it will enter Noise elimination air flue in lower cover component 30 further does middle low frequency and eliminated the noise.

Lower cover component 30 includes lower cover 374, cover plate 367, sealing gasket 377 and exhaust hose 366.

The inner surface of lower cover 374 has many studs, and stud and cover plate 367 are combined, and form the noise elimination of blower fan exhaust airstream Air flue.Specifically, 4 soket head cap screws 365,8 soket head cap screws 369 be each passed through stepped hole 379 on cover plate 367, 370, it is connected with the screwed hole 376,375 on lower cover 374, realizes the assembling of cover plate 367 and lower cover 374, forms gas muffler Road.

The both sides of lower cover 374 have steam vent 31,42, and the gas into lower cover 374 is discharged through exhaust outlet 31,42.

The front side of lower cover 374 has mounting hole 181, for being connected with front panel assembly (not shown).

Between cover plate 367 and lower cover 374 by the sealing gasket 377 that is clipped in the middle realize sealing between noise elimination air flue and The sealing of opposite outer.This hollow structure not only has the function of eliminating the noise, while enhancing the overall bending resistance of lower cover component 30 Roll over intensity.There is screwed hole 371,372,373, screwed hole 371 is used to connect, and screwed hole 372 is used to connect expectoration on cover plate 367 The air pump assembly (not shown) of machine, screwed hole 373 is used for the gas circuit component (not shown) for connecting expectoration machine.Have on cover plate 367 Screwed hole 368, for connecting vibration damper plate 282 (fan assembly 180 is integrally mounted at vibration damper plate).

The one end of exhaust hose 366 is connected with the second exhaust port 295 of fan assembly 180, one end and the lower cover on cover plate 367 The air inlet 378 of component 30 is connected, specifically, and it is soft that the external cylindrical surface of second exhaust port 295 and air inlet 378 inserts exhaust respectively In the inner cylinder face at the two ends of pipe 366, connection is realized, in order to strengthen the reliability of connection, clip is cased with the outside of exhaust hose 366 (not shown), exhaust hose 366 can be with finished products such as outsourcing medical corrugated pipe, wired hoses.Exhaust hose 366 not only acts as gas circuit The effect of connection, but also separated the vibrations shaken by the grade of fan assembly 180 between part and lower cover component 30 and transmit, play every Shake, buffer and damping effect.

Fig. 5 shows the top view of lower cover component 30, while having also clearly demonstrated that gas of the gas in lower cover component 30 Body flow graph, it can be seen that by being separated out the first slit 382, first between stud since air inlet in lower cover component 30 Expansion chambers 384, the second slit 386, the second expansion chambers 388, the 3rd slit 392, the 3rd expansion chambers 390, the 4th slit 398, Four expansion chambers 402, the 5th slit 413, the 5th expansion chambers 409, shunting slit 406.

The gas discharged from the second exhaust port 295 of blower fan 16 is entered after lower cover component by air inlet 378, from starting point 380 Set out, by the first slit 382 (arrow 381,383), into the first expansion chambers 384, complete the first order and eliminate the noise.Then again by Two slits 386 (arrow 385), into the second expansion chambers 388 (arrow 387,398), complete second level noise elimination.Go successively to the 3rd Slit 392 (arrow 391), the 3rd expansion chambers 390 (arrow 394), complete third level noise reduction.Enter back into (the arrow of the 4th slit 398 397) the 4th expansion chambers 402 (arrow 399), are reached, fourth stage noise reduction is carried out.Enter the 5th slit 413 (arrow 401) from 402, Into the 5th expansion chambers 409 (arrow 412), implement level V noise elimination.Gas flow shunting (the arrow of slit 406 after noise elimination 407), from shunting slit 406 out after (arrow 404), will be divided into two-way air-flow, a curb air flue (arrow 405,408,410, 411) discharged through steam vent 42；Another curb air flue (arrow 403,400,396,395,393) is discharged through steam vent 31.

Eliminated the noise for expansion property, sound deadening capacity size depends on the latus rectum of divergence ratio, i.e. expansion chambers and the ratio of slit latus rectum.And Frequency of noise elimination by length L1, L2, L3, L4, L5 of expansion chambers as it was previously stated, then determined.As can be seen from Figure, L1, L2, L3, L4, L5 length are different, and L1, L2 is long, are adapted to eliminate low-frequency noise, L3, L5 length are moderate, are adapted to elimination intermediate frequency and make an uproar Sound, L4 is most short, is adapted to eliminate a small amount of high-frequency noise.Expansion property, which is eliminated the noise, has one by frequency, i.e. expansion chambers length equal to sound wave During the integral multiple of half-wavelength, silencer does not play noise elimination to the noise of the frequency, in order to overcome disadvantages mentioned above, each slit The length of import and export is respectively designed to L/4, L/2 sizes (L represents the length of slit), it is possible to reduce leak through making an uproar for specific frequency Sound, improves soundproof effect.

L1, L2, L3, L5 size are all far longer than in fan assembly noise elimination air flue expansion chambers (i.e. described 3 in noise elimination cabin 313 Level reactive muffling air flue) length, therefore, the noise elimination cabin of fan assembly is mainly responsible for eliminating high-frequency noise, and in lower cover component Noise elimination air flue mainly eliminate Middle and low frequency noise, the combination of the different expansion chambers length of two parts can be to blower fan exhaust noise The frequency of ripple carries out all standing or most of covering, so as to preferably reduce the noise of full-automatic expectoration machine, model machine detection shows, The noise of blower fan 16 can reduce 20-30dB, and noise only has 55 decibels or so during work, meet hospital ward to noise of equipment It is required that.

Fig. 6 shows the figure that fan assembly 180 is assembled in lower cover component 30.In figure 6, the vortex of fan assembly 180 The air flow inlet 293 in cabin 298 is connected to fast gate valve 17 via flow sensor 14, and the fast other end of gate valve 17 is connected by flexible pipe 277 It is connected to expectoration main line interface 32.Flexible pipe 277 similarly not only acts as the effect of gas circuit connection, but also has separated by blower fan group Vibrations between vibrations part and lower cover component 30 that part 180, flow sensor 14, fast gate valve 17 are constituted are transmitted.Fan assembly 180th, fast gate valve 17 is fixed in lower cover component 30 by vibration damper plate 282.

Fig. 7 shows the structure of vibration damper plate 282.Fig. 8 shows the profile of the part of vibration damper plate 282 in Fig. 7.As schemed It can be seen that, on vibration damper plate 282, four caoutchouc elasticity beams 288,288 are evenly arranged together with 282 use bonding by Vulcanization, Four Rubber shock-absorbing pads 288 are connected by screw 290, packing ring 289 with the screwed hole 368 in lower cover component 30, are realized and are fixed.Spiral shell Nail 284 passes through packing ring 285, hole 286, adjustment packing ring 287 on vibration damper plate, connects with the screwed hole 340 of the bottom of fan assembly 180 Connect, fan assembly 180 is fixed on vibration damper plate 282.Meanwhile, screw passes through the kidney-shaped mounting hole and vibration damper plate on fast gate valve 17 Screwed hole 283 on 282 is connected, and fast gate valve 17 is fixed on vibration damper plate 282.

So as to which vibration damper plate 282 causes and the part such as fan assembly 180 thereon, flow sensor 14, fast gate valve 17 is with Cap assemblies 30 are separated, and play a part of damping and vibration isolation.

In addition, the blower fan 16 of the present invention is controlled by fan drive circuit plate 351, fan drive circuit plate 351 relies on 4 Screw 348, the spiral shell through on packing ring 349, the mounting hole 350 of fan drive circuit plate itself, with blower fan cabin 306, noise elimination cabin 313 Pit 347 is connected, and is fixed on fan assembly.The leaded (not shown) of fan drive circuit plate 351 is connected with internal blower fan.

Embodiment described above, is the present invention more preferably embodiment, those skilled in the art is at this The usual variations and alternatives carried out in the range of inventive technique scheme all should be comprising within the scope of the present invention.

Claims (9)

1. a kind of fan assembly, it is characterised in that including：Vortex cabin (298), dividing plate (303), blower fan cabin (306), noise elimination cabin (313) and closure (315),

Vortex cabin (298) has air flow inlet (293), spiral duct (336 and 337) and basic circle center, spiral duct (336 Hes 337) air flow inlet (293) and the basic circle center are connected；

Vortex cabin (298) is linked together by dividing plate (303) with blower fan cabin (306), and dividing plate (303) has centre bore, dividing plate (303) the basic circle center in central aperture vortex cabin (298)；

Blower fan (16) is placed with blower fan cabin (306), there is annular space (360) between blower fan (16) and blower fan cabin (306)；Wind Machine (16) has air inlet (353), first row gas port (326) and second exhaust port (295)；Air inlet (353) is directed at dividing plate (303) centre bore；Blower fan cabin (306) also includes semicircle air flue (308), and one end of semicircle air flue (308) is switched to blower fan (16) first row gas port (326)；

The front in noise elimination cabin (313) is provided with reactive muffling air flue, and noise elimination cabin (313) back side is provided with semicircle air flue (346), noise elimination cabin (313) there is special-shaped passage (345) and mounting hole (320), semicircle air flue (346) and the blower fan cabin (306) of noise elimination cabin (313) Semicircle air flue (308) constitute a complete air flue；The first row gas port (326) of the complete air flue connection blower fan (16) With special-shaped passage (345), connected by the special-shaped passage (345) with the reactive muffling air flue, so with the waist Shape hole (320) is connected；

The front of closure (315) sealing noise elimination cabin (313).

2. fan assembly according to claim 1, it is characterised in that

Air flow inlet (293) is arranged on the bulkhead of vortex cabin side, and basic circle is centrally disposed in the center of vortex cabin (298)；

The first row gas port (326) and second exhaust port (295) of the blower fan cabin (306) are all disposed within the side wall in blower fan cabin 306 On；

Dividing plate and wind that the banana-shaped semicircle air flue (308) of the blower fan cabin (306) is moved towards by the banana-shaped in blower fan cabin (306) The side wall of cabin (306) is formed.

3. fan assembly according to claim 1, it is characterised in that

The semicircle air flue (308) of the blower fan cabin (306) is banana-shaped semicircle air flue (308), banana-shaped semicircle air flue (308) Similar banana stem one end is switched to the first row gas port (326) of blower fan (16)；

The semicircle air flue (346) of the noise elimination cabin (313) is banana-shaped semicircle air flue (346), its banana with blower fan cabin (306) Shape semicircle air flue (308) constitutes a complete banana-shaped air flue.

4. fan assembly according to claim 1, it is characterised in that also include：

Special-shaped elastomer (305), special-shaped elastomer (305) molds according to the profile of blower fan (16), and blower fan (16) is placed on abnormity In elastomer (305),

The centre bore of special-shaped elastomer (305) and the centre bore (333) of dividing plate (303), the basic circle center in the vortex cabin (298) Overlap, the air inlet (353) of the centre bore of special-shaped elastomer (305) also with blower fan (16) is tightly connected.

5. fan assembly according to claim 1, it is characterised in that also including lower cover component (30), for supporting assembling The complete vortex cabin (298), dividing plate (303), blower fan cabin (306), noise elimination cabin (313) and closure (315), wherein,

Lower cover component (30) includes lower cover (374), cover plate (367), sealing gasket (377) and exhaust hose (366), lower cover (374) it is fixed together with cover plate (367) by sealing gasket (377), exhaust hose (366) one end and fan assembly (180) Second exhaust port (295) is connected, and one end is connected with the air inlet (378) through cover plate (367), sealing gasket (377)；

The multiple studs of lower cover (374) inner surface setting, stud and cover plate (367) combination, form blower fan (16) discharge gas Noise elimination air flue；

Lower cover (374) both sides are provided with two steam vents (31,42) being connected with the noise elimination air flue of its own.

6. fan assembly according to claim 5, it is characterised in that the noise elimination air flue of the lower cover component (30) is according to gas Stream flow direction includes successively：First slit (382), the first expansion chambers (384), the second slit (386), the second expansion chambers (388), the 3rd slit (392), the 3rd expansion chambers (390), the 4th slit (398), the 4th expansion chambers (402), the 5th slit (413), the 5th expansion chambers (409) and shunting slit (406)；

Gas into the noise elimination air flue of the lower cover component (30) is shunted via shunting slit (406), respectively through disappearing with described Connected two steam vents (the 31,42) discharge in information road.

7. fan assembly according to claim 6, it is characterised in that each slit of the lower cover component (30) and each expansion The length of room is both greater than the length of the reactive muffling air flue in noise elimination cabin (313).

8. fan assembly according to claim 5, it is characterised in that lower cover component (30) passes through vibration damper plate (282) and dress With the connection of the complete vortex cabin (298), dividing plate (303), blower fan cabin (306), noise elimination cabin (313) and closure (315), damping Plate (282) also includes the beam (288) for being used to be engaged with the screw being connected.

9. fan assembly according to claim 1, it is characterised in that the air flow inlet (293) of vortex cabin (298) is via stream Quantity sensor (14) is connected to fast gate valve (17), and fast gate valve (17) other end is connected to expectoration main line by flexible pipe (277) and connect Mouth (32).