CN205252244U - Fan component - Google Patents

Abstract

The utility model provides a fan component, includes: vortex cabin (298), baffle (303), fan cabin (306), noise elimination cabin (313) and sealed lid (315), vortex cabin (298) have air current entry (293), spiral wind channel (336 and 337) and base circle center, vortex cabin (298) link together through baffle (303) and fan cabin (306), and the base circle center of vortex cabin (298) is aimed at to the centre bore of baffle (303), placed fan (16) in fan cabin (306), fan (16) have air inlet (353), first gas vent (326) and second gas vent (295), noise elimination cabin (313) have resistance noise elimination air flue, semicircle air flue (346), special -shaped air vent (345) and waist shape hole (320), complete air flue intercommunication first gas vent (326) and special -shaped air vent (345) that two semicircle air flue (346, 308) are constituteed, and then with resistance noise elimination air flue intercommunication and waist shape hole (320) intercommunication, the front of sealed lid (315) sealed noise elimination cabin (313). The utility model provides a fan component small in noise.

Description

A kind of fan assembly

Technical field

The utility model relates to negative pressure and generates equipment, more specifically, relates to a kind of fan assembly.

Background technology

For because a variety of causes due to respiratory failure, comprise Respiratory Distress Syndrome(RDS) (ARDS), severePatient in acute pulmonary edema and asthma, respiratory insufficiency and major operation, lung ventilator is necessary important lifeLife support equipment. For the upper patient of lung ventilator, the timely and effective removing of sputum is very important, ifPhlegm is discharged not in time in respiratory tract, and dense phlegm and phlegm scab are easily assembled and stopped up bronchus tube chamber, have a strong impact on troublePerson's ventilatory function, increases the weight of respiratory failure, even causes Secondary cases atelectasis. Sputum or vegetativeHotbed, bacterium is caused infection to patient respiratory organ, makes patient be easy to Ventilator-associated pneumonia(VAP). But ventilated patients is because losing cough function, PFT slump of disastrous proportions, respiratory muscle are unableEtc. reason, patient is expectoration voluntarily often, and secretion significantly increases; In addition, ventilated patients many placesIn the disturbance of consciousness, cachexia state, coughing up of sputum function reduces, and makes original respiratory disease and exhalesSuction exhaustion increases the weight of; Trachea cannula and tracheotomy destroy bottleneck throat natural cover, weaken the clear of air flue ciliumClean effect, the reflex mechanism of weakening cough, expectoration. Therefore,, for ventilated patients, continuing hasThe sputum of dispelling of effect is prevention airway obstruction, maintains the key of mechanical ventilation.

Conventional suction sputum mode is sputum aspirator tube suction sputum, and it is through trachea cannula or gas with a tiny conduitPipe cuts pipe, inserts patient's air flue, by vacuum suction lasting in tiny conduit, sputum from patientSucking-off in body. In the time that conduit and secretion approach, secretion is sucked away. But the shortcoming of this suction sputum methodAlso be that significantly first it is a kind of suction sputum of intrusive mood, due to insertion and the movement of conduit, easily to gasRoad damages the even generation of air flue scar increase airway secretions, makes phlegm inhale more and more. Meanwhile, increase the weight ofHypoxemia, can not remove sputum immediately, increases and infects and hemorrhage danger. For most patientVery painful experience.

The another kind of method that ventilated patients airway secretions is removed is to use common expectoration machine, for example, flyThe coughassist of Li Pu company, it is in the time of expectoration, and first, patient's lung sucks and to approach maximum tidal volumeAir, then breathes out and sucks the air in lung with flank speed fast and suddenly, because air is with highSpeed is breathed out in patient's lung, and it is up that air-flow can carry secretion, and from patient airway with very highFlow velocity flows out, thereby reaches the object of removing patient's secretion. It removes secretion essence is that a kind of simulation is coughedThe mode of phlegm, this expectoration machine can connect with patient airway by trachea cannula, trachea cutting-pipe or face shield.This expectoration mode should be well more a lot of than aforesaid sputum aspirator tube suction sputum, and first, it is that a kind of non-intrusion type is inhaledPhlegm. Secondly, what expectoration machine produced is mobile high velocity air in the whole airway diameter of patient, length range,Therefore can play the effect of removing secretion from whole air flue. And sputum aspirator tube suction sputum is just in tiny catheter interiorThe low speed flow producing, secondly, due to the restriction of sputum aspirator tube size, sputum aspirator tube can only approach largerAir flue, and for those little more multistage point branch airway, helpless. Also has patient left and right bronchusBranch shape, determined that sputum aspirator tube, in the time inserting patient bronchus suction sputum, can only insert the gas on the right conventionallyRoad, the air flue on the left side cannot suction sputum. In the time of suction sputum, the overwhelming majority in patient respiration road not with sputum aspirator tube andThe contact of attraction air-flow can only be absorbed a little sputum near sputum aspirator tube. And the expectoration of expectoration machine, secretion isRemoved by the air-flow entirety in patient airway.

But expectoration machine also has shortcoming, for example, while giving ventilated patients expectoration, need to cut off lung ventilatorWith patient's vent line, expectoration machine is connected with patient and could carries out expectoration operation. But exhale for upperThe ventilated patients of suction machine, especially for urgent patient, cuts off lung ventilator and patient's ventilation continuallyPipeline may cause that sb.'s illness took a turn for the worse. Expectoration machine adopts loop cycle to stop the patient inhales stage, and it may be withServe problem, because for ventilation patient, volume circulation or flow circulation pattern are safer, moreEffectively. In addition, expectoration machine does not have end-expiratory positive pressure function (PEEP), and it is in expectoration latter end air fluePressure can only approximate atmospheric pressure. And end-expiratory positive pressure is in treatment Respiratory Distress Syndrome(RDS) ARDS, non-heart sourceProperty plays an important role when pulmonary edema, empsyxis, can promote sputum clearance simultaneously. And expectoration machine is for above-mentionedPatients with symptom is inapplicable, and in addition, the warning system that expectoration machine does not have life support equipment to be equipped with, makesWith security also cannot be guaranteed.

No matter conventional expectoration machine expectoration is air-breathing or expectoration, be all to adopt same pipeline, when expectorationThe secretion that air-flow comprises patient, these secretion may contain a large amount of bacteriums, and these secretion are piled up and are exposedIn tracheae, repeatedly contact with patient inhales air-flow, bring the risk of superinfection to patient.

Further, the air-breathing and expectoration of expectoration machine all adopts same blower fan, and when air-breathing and expectoration, face directly can for blower fanCan, containing germy air-flow and sputum, as different patients uses same expectoration machine, reduce potentially windService life of machine and increased the risk of cross-infection between different patients.

Patent WO2007054829 has proposed a kind of and lung ventilator associated working, and assisting patient is breathed, coughedCough, remove the expectoration machine of patient airway secretion, the difference of it and Philip coughassist is: to sickThe source of the gas that people carries out positive airway pressure does not re-use the blower fan of expectoration machine inside, but adopts to patient's mechanical ventilationLung ventilator. Patient's breathing and expectoration adopt different pipelines, establish respectively at breathing pipeline and expectoration pipelineHave switch valve, in the time of lung ventilator bio-occlusion patient ventilating, the switch valve being located on breathing pipeline is opened,And switch valve on expectoration pipeline is in closed condition. When patient inhales finishes, while being about to enter expiration state,Valve open on expectoration pipeline, expectoration machine starts expectoration. After expectoration finishes, the valve on expectoration pipeline closesClose, the valve open on breathing pipeline, patient enters suction condition, according to this circulation.

Compared with the coughassist expectoration machine of Philip, while carrying out suction sputum, do not need dismantle patient and lung ventilatorConnecting line, therefore, patient can not interrupted respirator treatment, especially for needs by giving lung ventilatorThe patient of PEEP treatment, interim interruption is disadvantageous especially, and PEEP is more conducive to expectoration. Meanwhile,Due to Philip expectoration machine need to dismantle lung ventilator could expectoration, therefore, can only could expectoration every certain phase,Sputum can not be removed immediately. And patent WO2007054829 is owing to not existing expectoration to tear the problem of lung ventilator open,Therefore, can be at any time, instant expectoration. Patient inhales and expectoration adopt different pipelines, have reduced patient twoThe risk of subinfection, adopts respectively the negative of lung ventilator and expectoration machine inside to patient's positive airway pressure and negative pressure expectorationPressure fan, has avoided the cross-infection between patient, has improved service life of fan.

But WO2007054829 utility model still has a lot of problems in force, such as noise is excessive,Dispel the heat bad, can affect that the work of lung ventilator is even reported to the police in the time of expectoration, noise is large etc.

A core component of expectoration machine is blower fan, when blower fan work, can produce high-decibel rotational noise and eddy currentNoise, noise can reach 75-90dB. And expectoration machine uses under ward environment, if made an uproar conventionallySound is excessive, will certainly impact patient's rest, sleep, mood, even has influence on the state of an illness.

Utility model content

The problem existing for above-mentioned prior art, the utility model proposes a kind of fan assembly, comprising: whirlpoolRevolve cabin, dividing plate, blower fan cabin, noise elimination cabin and seal cover, wherein,

Vortex cabin has air flow inlet, spiral duct and basic circle center, and spiral duct is communicated with described air flow inletWith described basic circle center;

Vortex cabin links together by dividing plate and blower fan cabin, and dividing plate has centre bore, the centre bore pair of dividing plateThe basic circle center in accurate vortex cabin;

Blower fan is placed with blower fan in cabin, between blower fan and blower fan cabin, has annular space; Blower fan have air inlet,First row gas port and second row gas port; Air inlet is aimed at the centre bore of dividing plate; Blower fan cabin also comprises semicircle air flue,One end of semicircle air flue is switched to the first row gas port of blower fan;

The front in noise elimination cabin is provided with reactive muffling air flue, and the back side, noise elimination cabin is provided with semicircle air flue, and noise elimination cabin hasAbnormity passage and mounting hole, the semicircle air flue in noise elimination cabin and the semicircle air flue in blower fan cabin form one completeAir flue; Described complete air flue be communicated with the first row gas port of blower fan and with special-shaped passage, by described abnormityPassage is communicated with described reactive muffling air flue, and then is communicated with described mounting hole;

The front in seal cap sealing noise elimination cabin.

What fan assembly of the present utility model proposed can vibration damping, the measure of noise reduction, and what make that blower fan produces is multipleThe noise of form, frequency drops to and meets relevant criterion.

Brief description of the drawings

Fig. 1 is the STRUCTURE DECOMPOSITION figure that fan assembly of the present utility model is seen from positive angle.

Fig. 2 is the STRUCTURE DECOMPOSITION figure that the fan assembly of Fig. 1 is seen from back side angle.

Fig. 3 is the cutaway view after the fan assembly of Fig. 1 is assembled.

Fig. 4 is the STRUCTURE DECOMPOSITION figure of the lower cap assemblies that matches with fan assembly.

Fig. 5 is the top view of the lower cap assemblies in Fig. 4, and while wherein having shown work, internal gas flows to.

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

Fig. 7 is the stereogram of the vibration damper plate in Fig. 6.

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

Detailed description of the invention

Embodiment of the present utility model is described with reference to the accompanying drawings, wherein identical accompanying drawing for identical partsMark represents.

Fig. 1-3 have shown decomposing schematic representation and the partial sectional view of blower fan of the present utility model. The utility modelFan assembly 180 comprise: vortex cabin 298, dividing plate 303, blower fan cabin 306, noise elimination cabin 313 and closeCapping 315.

Vortex cabin 298 links together by dividing plate 303 and blower fan cabin 306. Therefore, dividing plate 303 and whirlpoolRevolve cabin 298 and just fit tightly together, formed the airintake wind-tunnel of blower fan 16, it is characterized in that adopting A JiMead helix or log spiral, equilateral baseline or inequilateral baseline, gas outlet and spiral of ArchimedesThe basic circle center of circle overlap, meet fluid flow characteristics, there is the advantages such as air-flow is steady, air loss is little. ExcellentSelection of land, in dividing plate 303 and the one side that vortex cabin 298 contacts, posts bubble continuous, steeps continuous (not shown) and hasThe effect of sound absorption and sealing.

Vortex cabin 298 has air flow inlet 293, spiral duct 336 and 337, basic circle center. Gas flows intoMouth 293 is arranged on the bulkhead of side, vortex cabin. Basic circle center is arranged on vortex Cang298 center. Spiral wind336He337 one end, road is communicated with described air flow inlet 293, and the other end is communicated with basic circle center. Spiral duct byMultiple circular-arc space bars form in vortex cabin 298 inner compartment.

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

In blower fan cabin 306, be placed with blower fan 16, between blower fan 16 and blower fan cabin 306, there is annular space 360.Blower fan 16 has air inlet 353, first row gas port 326 and second row gas port 295. Air inlet 353 is aimed atThe centre bore of dividing plate 303, first row gas port 326 and second row gas port 295 are all arranged on blower fan cabin 306Sidewall on, and be distributed in relative both sides. Blower fan cabin 306 also comprises banana-shaped semicircle air flue 308. FragrantAny of several broadleaf plants shape semicircle air flue 308 is by the dividing plate of the banana-shaped trend in blower fan cabin 306 and the sidewall shape in blower fan cabin 306Become. 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 16326。

The front (one side in blower fan cabin 306 dorsad) in noise elimination cabin 313 is provided with 3 grades of reactive muffling air flues (figure1), the high-frequency noise of blower fan exhaust noise is carried out to noise reduction, why can only eliminate high-frequency noise, this be byMuffler space in noise elimination cabin 313 is smaller, and frequency of noise elimination is determined by the length of expansion chambers. Noise elimination cabinThere is a banana-shaped semicircle air flue 346 (Fig. 2) at 313 back sides (one side in connecting fan cabin 306), eliminate the noiseCabin 313 has special-shaped passage 345, mounting hole 320 and is positioned at 3 grades of positive reactive muffling air flue (arrows312,321,319 have shown the trend of gas in air flue), described 3 grades of reactive muffling air flues are along noise eliminationInwardly enclose and advance out of my cabin. Banana-shaped semicircle air flue 346 and banana-shaped semicircle air flue 308 form one completeBanana air flue. One end of banana-shaped semicircle air flue 346 similar banana stem and the first row gas port 326 of blower fan 16Communicate, the other end is communicated with special-shaped passage 345, special-shaped passage 345 with described in be positioned at positive noise eliminationAir flue is communicated with. The described other end that is positioned at positive noise elimination air flue is communicated with mounting hole 320.

Fastening by noise elimination cabin 313 and blower fan cabin 306 when assembling, gluing, the perfume (or spice) at 313 back sides, noise elimination cabinAny of several broadleaf plants shape semicircle air flue 346 (Fig. 2) combine group with the banana-shaped semicircle air flue 308 (Fig. 1) on blower fan cabin 306Become the exhaust passage of blower fan 16, the first row gas port 326 of the entrance of this exhaust passage and blower fan 16 aligns,First the gas of discharging when blower fan work will pass through this passage.

3 grades of reactive muffling air flues and the seal cover 315 in 313 fronts, noise elimination cabin fit together, and ensure each gasBetween road, mutually do not reveal, realize the effect of eliminating the noise.

It may be noted that the exhaust noise of 3 grades of reactive muffling air flues of 313 inside, cabin of not only eliminating the noise to blower fanPlay noise elimination effect, meanwhile, when gas flows to from the less mounting hole 320 of latus rectum the blower fan that latus rectum is larger16 and blower fan cabin 306 between annular space 360 (seeing Fig. 3), then flow to logical from this annular space 360The second row gas port 295 that footpath diminishes, has in fact also played the effect of reactive muffling, and meanwhile, this exhaust is made an uproarSound and blower fan, because the noise of generation of vibration suppresses mutually, further reduce noise.

Preferably, the sealing between seal cover 315 center external cylindrical surface and the interior centre bore in noise elimination cabin 313,To rely on O type circle 314. Particularly, O type circle 314 is placed to the ring of seal cover 315 center external cylindrical surfacesIn shape groove 318, in the time that the external cylindrical surface of seal cover 315 inserts the interior centre bore in noise elimination cabin 313, O type circle314 can produce radial elastic distortion, thereby realize sealing.

When assembling, seal cover 315 center external cylindrical surface matched in clearance is inserted the interior centre bore in noise elimination cabin 313In, (Fig. 3), the installing hole 317 then passing on seal cover 315 by screw 316, with noise elimination cabin 313On screwed hole 322 connect, complete being fitted and connected of seal cover 315 and noise elimination cabin 313, realize noise elimination cabinThe sealing of 313 interior 3 grades of reactive muffling air flues.

Preferably, fan assembly 180 of the present utility model also comprises special-shaped elastomer 305, blower fan 16 quiltsCan be placed in special-shaped elastomer 305, special-shaped elastomer 305 is according to the profile die sinking of blower fan 16, byRubber or polyurethane are made, and can well fit with blower fan 16 contact-making surfaces. Due to blower fan 16 generation of vibrationsNoise is in medium-high frequency, and this rubber elastomer intrinsic frequency, higher than spring, can effectively reduce vibration damping and reduceHigh-frequency noises.

The centre bore 333 of dividing plate 303 not only aligns with the centre bore of special-shaped elastomer 305, its center also withThe basic circle center of circle in spiral of Archimedes air channel overlaps, and has formed the gas outlet in vortex cabin 298. Vortex cabin298 and blower fan cabin 306 between sealing rely on O type circle 329, particularly, O shape circle 329 is arranged on whirlpoolRevolve 300 li of grooves on cabin 298, axially tight by screw 339 to vortex cabin 298 and blower fan cabin 305Gu, make O type circle 329 compress distortion, realize sealing.

The abnormity centre bore of elastomer 305 and the air inlet 353 of blower fan 16 communicate, particularly, and special-shaped bulletOutside cylinder 331 on gonosome 305 is inserted in the air inlet 353 of blower fan with interference fit, completes gas circuitConnect and sealing (Fig. 3). 2 screws 324 are through the installing hole 325 on blower fan 16, with special-shaped elasticityBuilt-in metal screwed hole 328 on body connects, and blower fan 16 is fixed on special-shaped elastomer 305, and quiltAbnormity elastomer 305 surrounds, supports. The other end outside cylinder 354 of elastomer 305 is also with interference fitMode is inserted in the circular hole 333 of dividing plate 303, and the end of the one side of dividing plate 303 and special-shaped elastomer 305Face fits together, and the counter sink 304 passing on dividing plate 303 by 4 sunk screws 302, with abnormityPre-buried metal threaded hole 341, elastomer 305 bottom surfaces connects, by blower fan 16, special-shaped elastomer 305 admittedlyFix on dividing plate 303. These 3 parts are fixed together with blower fan cabin 306 again, particularly, and by 3Individual sunk screw 301 is through the counter sink 332 on dividing plate 303, with the built-in metal spiral shell on blower fan cabin 306Pit 352 connects. And screw 339 is through installing hole 299 on vortex cabin 298, with spiral shell on blower fan cabin 306Pit 344 connects, and vortex cabin 298 and blower fan cabin 306 are linked together.

After expectoration machine is started working, the gas (arrow 338, is shown in Fig. 1) of extracting out in patient's lung is through gasInflow entrance 293 enters fan assembly 180 (specifically entering vortex cabin 298), along helix air channelFlow (arrow 337,336), flow out (arrow 335) from the basic circle center in helix air channel, through dividing plate303 centre bore 333 (arrow 334). The centre bore (arrow 330) of abnormity elastomer 305, enters windThe air inlet 353 of machine 16, then flow out (arrow 327) from the first row gas port 326 of blower fan 16, flow into fragrantAny of several broadleaf plants shape semicircle air flue 308 and 346 fastens in the bonding banana-shaped air flue forming, this banana-shaped air flue and noise eliminationCabin 313 3 grades of reactive muffling passages are above communicated with by special-shaped passage 345. Therefore gas is from banana-shapedAir flue through special-shaped passage 345 flow to 3 grades of reactive muffling passages on noise elimination cabin 313 (arrow 309,356), after 3 grades of reactive muffling passages (arrow 312,321,319) are eliminated the noise, from mounting hole 320Flow to blower fan cabin 306 (arrow 311,310), the heat-delivery surface 323 of blower fan 16 is purged and (schemed by shuntingArrow 357,364 in 3), blower fan 16 is dispelled the heat. Gas after shunting continue along blower fan 16 withAnnular space 360 between blower fan cabin 306 flow downward (arrow 363,362 in Fig. 3, arrow 358,359),, in second row gas port 295 positions, shunting Hou Ji road air-flow (arrow 361,342,343) againConverge to (arrow 307) together, discharge from the second row gas port 295 of general mood 16.

Mention in the above, because the muffler space in noise elimination cabin 313 is smaller, can only eliminate high-frequency noise. AndThe existing medium-high frequency of noise of general mood exhaust, also has low frequency, in order to eliminate Middle and low frequency noise, needs larger disappearingSound space. Fan assembly of the present utility model also comprises lower cap assemblies 30. On lower cap assemblies 30, lay whirlpoolRevolve cabin 298, dividing plate 303, blower fan cabin 306, noise elimination cabin 313 and seal cover 315.

Cap assemblies 30 gas flow of discharging from the second row gas port 295 of blower fan 16.

Further, the operation of fan assembly 180 needs blower fan drive circuit board 351 to control. Referring to Fig. 2,Blower fan drive circuit board 351 relies on 4 screws 348, through packing ring 349, the installing hole 350 of self,Be connected with the screwed hole 347 on blower fan cabin 306, noise elimination cabin 313, be fixed on fan assembly 180. WindThe leaded (not shown) of drive circuit plate 351 is communicated with inner blower fan 16.

Further, the fan assembly 180 of having assembled is by screwed hole 340 use screw (preferably, Ke YijiaIf caoutchouc elasticity beam and packing ring) be fixed on vibration damper plate 282 (seeing Fig. 6-8).

Fig. 4 is the STRUCTURE DECOMPOSITION figure of lower cap assemblies 30.

Lower cap assemblies 30 is fixed except the each parts of fan assembly being risen support, bears outside the function of equipment base,In fact also play noise elimination effect. The gas that blower fan 16 is discharged enters through blower fan cabin 306 and noise elimination cabin 313After row high frequency is eliminated the noise, the noise elimination air flue entering in lower cap assemblies 30 is further done to medium and low frequency noise elimination.

Lower cap assemblies 30 comprises lower cover 374, cover plate 367, sealing gasket 377 and exhaust hose 366.

Lower cover 374 inner surfaces have a lot of studs, and stud and cover plate 367 combine, and have formed blower fan exhaust gasThe noise elimination air flue of stream. Particularly, 365,8 soket head cap screws 369 of 4 soket head cap screws pass respectivelyStepped hole 379,370 on cover plate 367, is connected with the screwed hole 376,375 on lower cover 374, realThe assembling of existing cover plate 367 and lower cover 374, forms noise elimination air flue.

Lower cover 374 both sides have steam vent 31,42, the gas that enters lower cover 374 through exhaust outlet 31,42 discharge.

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

Between cover plate 367 and lower cover 374, rely on the sealing gasket 377 being clipped in the middle to realize between noise elimination air flueSealing and relative outside sealing. This hollow structure not only has the function of noise elimination, has strengthened time simultaneouslyThe overall bend resistance intensity of cap assemblies 30. On cover plate 367, there is screwed hole 371,372,373, screw threadHole 371 is for connecting, and screwed hole 372 is for connecting the air pump assembly (not shown) of expectoration machine, screwed hole373 for connecting the gas circuit assembly (not shown) of expectoration machine. On cover plate 367, there is screwed hole 368, forConnect vibration damper plate 282 (fan assembly 180 one are arranged on vibration damper plate).

Exhaust hose 366 one end are connected with the second row gas port 295 of fan assembly 180, one end and cover plateThe air inlet 378 of the lower cap assemblies 30 on 367 connects, particularly, and second row gas port 295 and air inlet378 external cylindrical surface inserts respectively in the inner cylinder face at exhaust hose 366 two ends, to realize and connecting, in order to increaseThe strong reliability connecting, has clip (not shown) in the outer surface cover of exhaust hose 366, and exhaust hose 366 canWith finished products such as outsourcing medical corrugated pipe, wired hoses. Exhaust hose 366 not only plays the effect that gas circuit is communicated with,Transmit but also cut off by the vibrations between the vibrations parts such as fan assembly 180 and lower cap assemblies 30, playThe effect of vibration isolation, buffering and damping.

Fig. 5 has shown the top view of time cap assemblies 30, has also clearly illustrated that gas is at lower cap assemblies simultaneouslyGas flow cardon in 30, as can be seen from the figure, starts by between stud from air inlet on lower cap assemblies 30Be separated out the first slit 382, the first expansion chambers 384, the second slit 386, the second expansion chambers 388, the 3rd narrowGroove 392, the 3rd expansion chambers 390, the 4th slit 398, the 4th expansion chambers 402, the 5th slit 413,Five expansion chambers 409, shunting slit 406.

The gas of discharging from the second row gas port 295 of blower fan 16 is entered after cap assemblies by air inlet 378,From starting point 380s, through the first slit 382 (arrow 381,383), enter the first expansion chambers 384,Completing the first order eliminates the noise. And then by the second slit 386 (arrow 385), enter the second expansion chambers 388 (arrows387,398), completing the second level eliminates the noise. Continuing to enter the 3rd slit 392 (arrow 391), the 3rd expandsOpen chamber 390 (arrow 394), complete third level noise reduction. Enter again the 4th slit 398 (arrow 397), arriveReach the 4th expansion chambers 402 (arrow 399), carry out fourth stage noise reduction. Enter the 5th slit 413 (arrows from 402401), enter the 5th expansion chambers 409 (arrow 412), implement level V and eliminate the noise. Gas after noise eliminationFlow to shunting slit 406 (arrow 407), from shunting slit 406 out (arrow 404), will be divided intoTwo-way air-flow, a curb air flue (arrow 405,408,410,411) is discharged through steam vent 42; AnotherCurb air flue (arrow 403,400,396,395,393) is discharged through steam vent 31.

Eliminate the noise for expansion property, sound deadening capacity size depends on divergence ratio, i.e. the latus rectum of expansion chambers and slit latus rectumRatio. And frequency of noise elimination as previously mentioned, determined by length L 1, L2, L3, L4, the L5 of expansion chambers.As can be seen from Figure, L1, L2, L3, L4, L5 length is different, L1, L2 is long, suitableClose elimination low-frequency noise, L3, L5 length are moderate, are applicable to eliminating mid-frequency noise, and L4 is the shortest, is applicable to eliminatingA small amount of high-frequency noise. Expansion property eliminates the noise and has one by frequency, and expansion chambers length equals sound wave half-wavelengthWhen integral multiple, silencer does not play noise elimination effect to the noise of this frequency, in order to overcome above-mentioned shortcoming, each narrowThe length of the import and export of groove is designed to respectively L/4, and L/2 size (L represents the length of slit), can reduce leakageCross the noise of CF, improve soundproof effect.

L1, L2, L3, L5 size are all far longer than noise elimination cabin 313 interior noise elimination Airway dilations in fan assemblyThe length of chamber (being described 3 grades of reactive muffling air flues), therefore, be mainly responsible for disappearing in the noise elimination cabin of fan assemblyExcept high-frequency noise, and noise elimination air flue in lower cap assemblies is mainly eliminated Middle and low frequency noise, two different expansions of partsOpen the combination of chamber length, can carry out all standing or most of covering to blower fan exhaust noise wave frequency, fromAnd better reduce the noise of full-automatic expectoration machine, and model machine detects and shows, and the noise of blower fan 16 can reduce20-30dB, when work, noise only has 55 decibels of left and right, meets the requirement of hospital ward to noise of equipment.

Fig. 6 has shown that fan assembly 180 is assembled to the figure on lower cap assemblies 30. In Fig. 6, blower fan groupThe air flow inlet 293 in the vortex cabin 298 of part 180 is connected to the fast family of power and influence 17 via flow sensor 14, fastThe family of power and influence's 17 other ends are connected to expectoration main line interface 32 by flexible pipe 277. Flexible pipe 277 similarly not onlyPlay the effect that gas circuit is communicated with, but also cut off by fan assembly 180, flow sensor 14, the fast family of power and influenceVibrations transmission between vibrations part and the lower cap assemblies 30 of 17 compositions. Fan assembly 180, the fast family of power and influence 17All be fixed on lower cap assemblies 30 by vibration damper plate 282.

Fig. 7 has shown the structure of vibration damper plate 282. Fig. 8 has shown vibration damper plate 282 parts in Fig. 7Profile. As can be seen, on vibration damper plate 282, be evenly arranged four caoutchouc elasticity beams 288,288Together with 282 employing bonding by Vulcanizations, four Rubber shock-absorbing pads 288 by screw 290, packing ring 289 withScrewed hole 368 on lower cap assemblies 30 connects, and realizes fixing. Screw 284 is through packing ring 285, dampingHole 286 on plate, adjustment packing ring 287, be connected with the screwed hole 340 of fan assembly 180 bottoms, makes windThermomechanical components 180 is fixed on vibration damper plate 282. Meanwhile, screw is through the kidney-shaped installing hole on the fast family of power and influence 17Be connected with the screwed hole 283 on vibration damper plate 282, the fast family of power and influence 17 is fixed on vibration damper plate 282.

Thereby vibration damper plate 282 makes and on fan assembly 180, flow sensor 14, the fast family of power and influence 17Separate Deng parts and lower cap assemblies 30, play the effect of damping and vibration isolation.

In addition, blower fan 16 of the present utility model is to be controlled by blower fan drive circuit board 351, and blower fan drives electricityRoad plate 351 relies on 4 screws 348, through the installing hole 350 of packing ring 349, blower fan drive circuit board self,Be connected with the screwed hole 347 on blower fan cabin 306, noise elimination cabin 313, be fixed on fan assembly. Blower fan drivesThe moving leaded (not shown) of circuit board 351 is communicated with inner blower fan.

Above-described embodiment, just more preferably detailed description of the invention of the utility model, the skill of this areaThe common variation that art personnel carry out within the scope of technical solutions of the utility model and replacement all should be included in this realityIn novel protection domain.

Claims (9)

1. a fan assembly, is characterized in that, comprising: vortex cabin (298), dividing plate (303), blower fan cabin (306), noise elimination cabin (313) and seal cover (315),

Vortex cabin (298) has air flow inlet (293), spiral duct (336 and 337) and basic circle center, and spiral duct (336 and 337) is communicated with described air flow inlet (293) and described basic circle center;

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

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

The front in noise elimination cabin (313) is provided with reactive muffling air flue, the back side, noise elimination cabin (313) is provided with semicircle air flue (346), noise elimination cabin (313) has special-shaped passage (345) and mounting hole (320), complete air flue of the semicircle air flue (346) of noise elimination cabin (313) and the semicircle air flue (308) in blower fan cabin (306) composition; Described complete air flue be communicated with the first row gas port (326) of blower fan (16) and with special-shaped passage (345), be communicated with described reactive muffling air flue by described special-shaped passage (345), and then be communicated with described mounting hole (320);

The front in seal cover (315) sealing noise elimination cabin (313).

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

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

First row gas port (326) and the second row gas port (295) in described blower fan cabin (306) are all arranged on the sidewall in blower fan cabin 306;

The banana-shaped semicircle air flue (308) in described blower fan cabin (306) is formed by the dividing plate of the banana-shaped trend in blower fan cabin (306) and the sidewall of blower fan cabin (306).

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

The semicircle air flue (308) in described blower fan cabin (306) is for also comprising banana-shaped semicircle air flue (308), and similar banana stem one end of banana-shaped semicircle air flue (308) is switched to the first row gas port (326) of blower fan (16);

The semicircle air flue (346) in described noise elimination cabin (313) is banana-shaped semicircle air flue (346), complete banana-shaped air flue of banana-shaped semicircle air flue (308) composition of itself and blower fan cabin (306).

4. fan assembly according to claim 1, is characterized in that, also comprises:

Abnormity elastomer (305), special-shaped elastomer (305) is according to the profile die sinking of blower fan (16), and blower fan (16) is placed in special-shaped elastomer (305),

The centre bore of abnormity elastomer (305) overlaps with the basic circle center of circle in the centre bore (333) of dividing plate (303), described vortex cabin (298), and the centre bore of special-shaped elastomer (305) also aligns and seals with the air inlet (353) of blower fan (16).

5. fan assembly according to claim 1, it is characterized in that, also comprise lower cap assemblies (30), for complete vortex cabin (298), dividing plate (303), blower fan cabin (306), noise elimination cabin (313) and the seal cover (315) of support assemblies, wherein

Lower cap assemblies (30) comprises lower cover (374), cover plate (367), sealing gasket (377) and exhaust hose (366), lower cover (374) and cover plate (367) are fixed together by sealing gasket (377), exhaust hose (366) one end is connected with the second row gas port (295) of fan assembly (180), and one end is connected with the air inlet (378) that passes cover plate (367), sealing gasket (377);

Lower cover (374) inner surface arranges multiple studs, stud and cover plate (367) combination, the noise elimination air flue of formation blower fan (16) Exhaust Gas;

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

6. fan assembly according to claim 5, it is characterized in that, the noise elimination air flue of described lower cap assemblies (30) comprises successively according to air current flow direction: the 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);

The gas that enters the noise elimination air flue of described lower cap assemblies (30) is shunted via shunting slit (406), and two steam vents (31,42) that are connected through described noise elimination air flue are respectively discharged.

7. fan assembly according to claim 6, is characterized in that, each slit of described lower cap assemblies (30) and the length of each expansion chambers are all greater than the length of the reactive muffling air flue in noise elimination cabin (313).

8. fan assembly according to claim 5, it is characterized in that, lower cap assemblies (30) is connected with the vortex cabin (298) of having assembled, dividing plate (303), blower fan cabin (306), noise elimination cabin (313) and seal cover (315) by vibration damper plate (282), and vibration damper plate (282) also comprises the beam (288) for matching with the screw that is connected use.

9. fan assembly according to claim 1, it is characterized in that, the air flow inlet (293) in vortex cabin (298) is connected to the fast family of power and influence (17) via flow sensor (14), and the fast family of power and influence (17) other end is connected to expectoration main line interface (32) by flexible pipe (277).