A kind of silencer of positive airway pressure equipmentTechnical field
The utility model relates to a kind of silencer, particularly relates to a kind of silencer of positive airway pressure equipment.
Background technique
Noise is excessive in use for common positive airway pressure equipment in the market, has a strong impact on patient and family's quality of human sleeping, though can alleviate the illnesss such as snoring, low ventilation, the mental attitude of patient is reduced greatly, thus affects work, study, quality of life.In addition, be in for a long time in the noisy environment of high-decibel, also can the hearing of injured patients.Existing positive airway pressure equipment many employings motor drives and produces source of the gas, and positive airway pressure equipment is generally used for the treatment of the respiratory disorder such as sleep apnea syndrome and COPD (CAO disease).The feature of this equipment is rotated in cavity by centrifugal blower, cavity is equipped with suction port by centre bit, flabellum tangent direction is provided with air outlet, during machine operation, rotating speed is at thousands of extremely up to ten thousand revs/min, the noise that easy generation is very strong, the general method abated the noise adopted has at present: damping, sound-absorbing, sound insulation.Damping---adopt the parcel such as sponge, rubber motor, avoid the sound shaken to reach outside equipment; Sound-absorbing---use sponge to be affixed on gas channel inwall and absorb noise; Sound insulation---use density larger material such as aluminium sheet, iron plate etc. to make gas channel, make sound be interposed between minimizing in passage and spread out of.The relevant device of some company, adopts rubber and plastic or sponge wrapping motor shock absorption, and form air flue sound-absorbing, sound insulation, the product of other companies places motor in aluminum box, and inwall pastes sponge, profit sound insulation in this way, sound-absorbing.But these methods all Existential Space utilization ratio is not high, noise can not well be isolated, the problem that air outlet noise does not deal with.
Above-mentioned several method is all undesirable, does not fundamentally solve noise problem.The noise of 90% is all produced by flabellum and air friction and bottleneck effect, simple do sound insulating and absorbing and damping can not reach desirable effect, and the volume and weight of equipment can be increased, also airway resistance can be increased, if airway resistance is higher, the susceptibility that the sensor that will reduce system changes the airway resistance of people, affects the normal work of equipment.
For these shortcomings, the utility model adopts unique double-deck layout design, the soft air intake of rotary stereo, increase the design of the design of suction port noise-proofing refluxing opening and air outlet buffer cavity simultaneously, to reach good noise reduction, have that space availability ratio is high simultaneously, compact structure, be easy to produce, assemble the features such as simple.
Summary of the invention
The purpose of this utility model is the silencer providing a kind of positive airway pressure equipment, has reached the effect that abates the noise better.
For achieving the above object, technical solution of the present utility model is: a kind of silencer of positive airway pressure equipment, and comprise upper cover, middle body and base, middle body is positioned between upper cover and base, it is characterized in that:
A. described upper cover 1 is provided with helical stereo rotating air intake body 2, and it and upper cover 1 are in aggregates and be interconnected;
B. described middle body 3 to be two-layerly made up of upper and lower, and upper strata comprises blower fan placed cavity 5, exhaust outlet buffer cavity 7, exhaust outlet 9, is placed with centrifugal blower 6 in blower fan placed cavity 5, and this centrifugal fan air outlet 8 is communicated with exhaust outlet buffer cavity 7; Lower floor comprises intake grill 10, wind chamber 11, has noise-proofing refluxing opening 12 in this wind chamber, and noise-proofing refluxing opening is lower large upper toy trumpet shape, and its outlet is communicated with upper strata blower fan placed cavity 5.
The beneficial effects of the utility model are: owing to have employed unique double-deck layout design, the soft air intake of rotary stereo, increase the design of the design of suction port noise-proofing refluxing opening and air outlet buffer cavity simultaneously, reach good noise reduction, have that space availability ratio is high simultaneously, compact structure, be easy to produce, assemble the advantages such as simple.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the superstructure schematic diagram of body in the utility model.
Fig. 3 is the substructure schematic diagram of body in the utility model.
In figure: 1-upper cover, 2-helical stereo rotating air intake body, body in 3-, 4-base, 5-blower fan placed cavity, 6-centrifugal blower, 7-exhaust outlet buffer cavity, 8-fan outlet, 9-exhaust outlet, 10-intake grill, 11-wind chamber, 12-noise-proofing refluxing opening, 13-air inlet.
Embodiment
Below in conjunction with accompanying drawing, the utility model and embodiment thereof are described in further detail.
See Fig. 1-3, the utility model comprises a kind of silencer of positive airway pressure equipment, has reached the effect that abates the noise better.
For achieving the above object, the utility model comprises a kind of silencer of positive airway pressure equipment, and comprise upper cover, middle body and base, middle body is positioned between upper cover and base, it is characterized in that:
A. described upper cover 1 is provided with helical stereo rotating air intake body 2, and it and upper cover 1 are in aggregates and be interconnected;
B. described middle body 3 to be two-layerly made up of upper and lower, and upper strata comprises blower fan placed cavity 5, exhaust outlet buffer cavity 7, exhaust outlet 9, is placed with centrifugal blower 6 in blower fan placed cavity 5, and this centrifugal fan air outlet 8 is communicated with exhaust outlet buffer cavity 7; Lower floor comprises intake grill 10, wind chamber 11, has noise-proofing refluxing opening 12 in this wind chamber, and noise-proofing refluxing opening is lower large upper toy trumpet shape, and its outlet is communicated with upper strata blower fan placed cavity 5.
Start centrifugal blower 6, the intake grill 10 of natural wind therefrom body lower floor enters in wind chamber 11, through noise-proofing refluxing opening 12, enter in the blower fan placed cavity 5 on body upper strata, arrive the helical stereo rotating air intake body 2 of upper cover again, the intake grill 13 of centrifugal blower 6 is entered after water conservancy diversion, exhaust outlet buffer cavity 7 is entered after being accelerated by centrifugal blower 6, finally from exhaust outlet 9, air-flow is derived, again by the air-flow of deriving by the place such as nasal cavity of tubes connection to patient, due to the deadening of airtight cavity, helical stereo rotating air intake, the sound absorption of the horn-like design of noise-proofing refluxing opening and cavity inner wall foam body makes better effects if of the present utility model.
Described Zhong Ti lower floor is arranged in the back side on body upper strata, and the two difference 180 ° is in back to back structure (see Fig. 2,3), and upper cover, middle body, base are connected and namely form the utility model.