CN101296722B - Single or multiple stage blower and nested volute(s) and/or impeller(s) therefor - Google Patents
Single or multiple stage blower and nested volute(s) and/or impeller(s) therefor Download PDFInfo
- Publication number
- CN101296722B CN101296722B CN200680040333.0A CN200680040333A CN101296722B CN 101296722 B CN101296722 B CN 101296722B CN 200680040333 A CN200680040333 A CN 200680040333A CN 101296722 B CN101296722 B CN 101296722B
- Authority
- CN
- China
- Prior art keywords
- spiral case
- impeller
- double
- blower fan
- ended drum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
A single-ended or double-ended blower comprises a blower motor assembly (M) supporting opposed first (258) and second (260) shaft ends, the first (258) and second (260) shaft ends having respective first (244) and second (248) impellers attached thereto and enclosed within first (247) and second (251) volutes, respectively, wherein the first volute (247) is connected to an inlet (264) and the second volute (251) is connected to an outlet (276). The blower motor assembly (M) is supported in the sub-base shell (238), with a radial outer inter-stage gas path extending between the first (247) and second (251) volute, wherein, the second volute (251) at least partly in principle coaxial sheath with the radial outer inter-stage gas path.
Description
Cross reference in first to file
It is 60/730 that the application requires to enjoy in the application number of submitting on October 28th, 2005,875 U.S. Provisional Application, the application number of submitting on August 31st, 2006 are 60/841,202 U.S. Provisional Application and the application number of submitting on February 22nd, 2006 are 60/775, the interests of 333 U.S. Provisional Application, the full content of each application is incorporated herein by reference.
Technical field
The present invention relates to a kind of device for supply with breathable gas to human body, for example, be used for obstructive sleep apnea (OSA:Obstructive Sleep Apnea), treat the perhaps application of assisted ventilation such as emophysematous other respiratory tract disease and disorderly continuous positive airway pressure (CPAP:ContinuousPositive Airway Pressure).
Prior art
The CPAP treatment of OSA, namely a kind of form of noninvasive positive pressure ventilation (NIPPV:NoninvasivePositive Pressure Ventilation) relates to the air flue that utilizes conduit and face shield the breathable gas that is generally air of supercharging to be transported to the patient.According to patient's needs, the air pressure that is used for CPAP can be limited to such as the 4cm water column to the scope of 30cm water column (being typically in the scope of 8-15cm water column), and it flows scooter 180L/min (place records at face shield).Pressurization gas stops airway contraction as the inflatable splint of patient airway, especially in the expiratory phase of breathing.
Typically, in the CPAP process, pressure that the patient ventilates is changed according to the stage of patient respiratory cycle.For example, air interchanger for example can be used control algolithm to be preset as and carry two pressure, namely (IPAP:inspiratory positive airway pressure (for example at the inspiratory phase Positive Airway Pressure of the expiratory phase of breath cycle, the 4-8cm water column)), with the expiratory phase Positive Airway Pressure (EPAP:expiratory positive airwaypressure (for example, 10-20cm water column)) in the expiration phase of breath cycle.Idealized system for CPAP can be changed on quick between IPAP and EPAP pressure, effective also noiseless ground, and the while provides the pressure support ventilation of maximum to the patient at the initial stage of expiratory phase.
In traditional CPAP system, supply with patient's air by the aerator with single impeller, namely single-stage blower comes supercharging.This impeller is packaged in spiral case or the housing, and input gas is closed in this spiral case or the housing also simultaneously by the rotary blade supercharging.Pressurization gas for example leaves gradually spiral case by the air delivery passage that typically comprises air delivery pipe and is sent to patient's face shield place.
Other aerator uses a pair of impeller, and for example, impeller is positioned at the either side of motor but is fixed on the public output shaft.It is that 6,910,483 total U.S. Patent application and the serial number submitted to June 10 in 2004 are that its full content separately is incorporated herein by reference in 10/864,869 the total copending application that this structure is disclosed in the patent No..
Usually, the single-stage blower noise is large and be not so good as like that sensitivity of two-stage aerator, because need to obtain for more time desirable pressure.The two-stage aerator is because less at the noise that just can produce desirable pressure thereby generation than low velocity operation, and sensitiveer.On the other hand, two-stage or double-ended drum blower fan seem excessive for application-specific.
Summary of the invention
A scheme of the present invention normally relates to a kind of single-stage or multistage (for example, two-stage and more than) variable-speed blower assembly, and it provides higher reliability and more low noisely provides simultaneously faster pressure response time, and package dimension is less.
Another scheme of the present invention relates to the impeller that a kind of blower assembly with being used for the treatment of sleep disordered breathing together uses.
For this reason, exemplary embodiment described herein has particularly advantageous various structures scheme.A scheme relates to the blower motor assembly, relates in particular to the reduction to typical motor case, therefore reduces its size and weight.Along with the reduction of motor case, motor body and supported space boundary between the base (chassis) of motor body and be used for the first spiral case motor of the pressurized air between the first order and the second level impeller.
In an embodiment, will to be substantially spatial division radially be two parts to the annular segmentation sealing member between motor shell and the base.First wherein or top have held the first half of blower motor assembly and have comprised for air inlet from non pressurized gas to the first order impeller that is positioned at motor upper end that supply with, and wherein second one or bottom have held the Lower Half of blower motor assembly and comprise the first spiral case and to the second air inlet of the second level impeller of the lower end that is positioned at motor or end opposite.In other words, the mode of the first spiral case in the top by the inter-stage passage be to the second air inlet supply gas at second level impeller place, and be positioned at the motor body and the second spiral case of being presented axially in below the first spiral case makes air move to the base air vent.This axial nested layout and the inter-stage passage of spiral case have been saved the space significantly.
Another organization plan of exemplary embodiment relates to the blower motor assembly is supported on a plurality of springs in the base, so that blower motor assembly and base are isolated in vibration.Another correlated characteristic is the top cover use plastic material for the blower motor assembly; Be cutting apart sealing member and using relatively soft flexible polymer such as silicone rubber for the joint between blower motor assembly outlet and the base outlet between blower motor assembly and the base; And be that motor cover and motor body use the metal such as aluminum or magnesium.The combination that is used for the dissimilar material of different ingredients can suppress vibration and therefore reduce noise.
The responding ability that changes for pressure in order to reduce inertia thereby raising, first and second grades of impellers are two shield (double-shroud) types, but a pair of shield that is positioned on each impeller is not identical.Exactly, shield extends relatively short distance from the center hub of impeller in radially outer direction.Another shield extends radially outwardly to the external margin of impeller blade, but this shield has the internal diameter central opening similar to the external diameter of less shield.This structure (sometimes being called as " alternative expression shield " structure herein) is convenient to make and reduce inertia by the material usage that reduces the impeller outside, and can not lose the rigidity requirement of impeller.This method also can reduce the sensitivity for the variation in the gap between impeller and the cover (cover).
In another embodiment, nested type spiral case element is fixed together around blower motor, be clipped in simultaneously and can fasten between the top and bottom cover (lid) or cover of (snap-fit) (perhaps otherwise for suitably connect) to each spiral case element, with the assembly that axially compact is provided and is easy to assemble.Described assembly also is fit to be contained in cup-shaped, the open-ended flexible sleeve.
Impeller wheel blade (vane) or blade (blade) be continuous bend diametrically, but its width also reduces gradually at the edge of radially outer along contiguous small diameter shield simultaneously.In addition, the outermost transverse edge of blade or wheel blade can be stepped along its transverse width separately.This design reduces the eddy current crack at blade tip place, and in addition, impeller is preferably made by polypropylene rather than conventional Merlon, thereby further acoustic damping characteristic is provided.
In selectivity embodiment, the larger diameter shield can have frusto-conical (truncated frusto-conical shape), its edge along impeller blade on the radical length direction has corresponding tapering, thereby radially outer width on the radial outside direction of blade is reduced gradually.
Another feature relates to along one or two the neighbouring surface in top or bottom cover or the cover and has the coupling tapering, to provide substantially invariable distance between taper blade edge and contiguous lid or cover surface.
Preferably, first and second grades of impellers are fixed on the opposite end of the motor output shaft that centers on common axle rotation.Impeller is set to by the gas channel fluid communication with each other, thereby described impeller makes gas boosting jointly in the first and second spiral cases before gas leaves the base outlet.
Therefore, in a scheme, the present invention relates to a kind of double-ended drum blower fan, described double-ended drum blower fan comprises: the blower motor assembly that supports the first and second relative axle heads, the first and second axle heads respectively have the first and second impellers that are connected thereto and are enclosed in respectively in the first and second spiral cases, and wherein the first spiral case is connected to entrance and the second spiral case is connected to outlet; The blower motor assembly is supported in the base shell; Radially outer inter-stage passage between the first and second spiral cases, wherein the second spiral case is coaxial nested substantially with radially outer inter-stage gas passage at least in part.
In another scheme, the present invention relates to a kind of double-ended drum blower fan, described double-ended drum blower fan comprises: support the blower motor assembly of the first and second relative axle heads, the first and second axle heads have respectively the first and second impellers that are connected thereto; The blower motor assembly is supported in the base shell and comprises the motor body, and described motor body comprises lower wall, peripheral sidewall and overhead guard, and wherein overhead guard is provided with the flexible seals that engages with the inwall of described base shell.
In another scheme, the present invention relates to a kind of aerator that comprises the blower motor assembly, described blower motor assembly supports the axle that axle head is provided with impeller, and described impeller has the wheel blade of a plurality of bendings, and the width of each wheel blade reduces gradually at its radially outer.
Another scheme of the present invention is for a kind of impeller, and described impeller comprises the top shield; The bottom shield; A plurality of wheel blades that extend to the bottom shield from the top shield, each described wheel blade comprises the apical margin in the inner radial of wheel blade that contacts with the top shield, and the root edge at the radially outer of wheel blade that contacts with the bottom shield, thereby the inner radial at the wheel blade at the root edge place of each wheel blade is not contacted or the adjacent bottom shield, and do not contact or the adjacent top shield at the radially outer of the wheel blade of the upper edge of each wheel blade.
In another scheme, the present invention relates to a kind of double-ended drum blower fan, comprising: blower motor, it comprises the first and second axle heads that relatively extend that support respectively the first order and second level impeller; The first and second spiral case elements, it is at the opposite side of motor and fixed to one another; Be connected to top cover or the overhead guard and the bottom that is connected to the second spiral case or end cover of the first spiral case, the first spiral case element and top cover or overhead guard limit the first spiral case that first order impeller wherein has been installed, the second spiral case element and bottom or end cover limits the second spiral case that the second impeller wherein has been installed, the first and second spiral cases by with the first and second axle heads substantially coaxial nested spiral inter-stage gas passage be connected.
Described or other scheme will be described or become apparent in the detailed description of the preferred embodiment hereinafter.
Description of drawings
Fig. 1 is the axonometric chart according to the blower motor assembly of the first exemplary embodiment of the present invention;
Fig. 2 is the axonometric chart of the blower motor assembly of Fig. 1, but rotates approximately 90 ° with the vertical central axis that counterclockwise centers on assembly;
Fig. 3 is another axonometric chart of blower motor assembly shown in Figure 1, but the overhead guard of assembly is removed;
Fig. 4 is the axonometric chart according to the blower motor assembly of another exemplary embodiments of the present invention;
Fig. 5 is the blower motor assembly of key diagram 4 and the exploded perspective view of base combination;
Fig. 6 is the axonometric chart similar to Fig. 5, but blower motor assembly inserted base;
The sectional view that Fig. 7 obtains for the line 7-7 along Fig. 6;
Fig. 8 is the axonometric chart of a kind of impeller in the blower motor assembly shown in load map 1 and 4;
Fig. 9 is the axonometric chart of the opposition side of impeller shown in Figure 8;
The sectional view that Figure 10 obtains for the line 10-10 along Fig. 9;
Figure 10-1 is the view of impeller according to another embodiment of the invention to 10-6;
Figure 10-7 is the view of three selectivity embodiment of impeller with chamfering of wheel blade or blade tip to 10-10;
Figure 11 is similar to Fig. 6, but is provided with top cover above base, and the axonometric chart of the biopsy cavity marker devices of the blower motor assembly of removal part base and first order impeller and base;
Figure 12 is the blower motor assembly of Figure 11 and the view of base, but observes from slightly different angles, and support spring removed for clarity;
Figure 13 is the sectional view similar to Figure 12, but the blower motor assembly is also dissectd;
Figure 14 is the plane graph of base, and base cover and blower motor assembly are removed;
Figure 15 is the upward view of blower motor assembly shown in Figure 4;
Figure 16 is the axonometric chart according to the flexible sleeve that together uses with the blower motor assembly of another embodiment;
Figure 17 is the top view of sleeve shown in Figure 16;
Figure 18 is the side view of the sleeve shown in Figure 17 that dissects along the line 18 among Figure 17;
Figure 19 is the upward view of sleeve shown in Figure 16;
Figure 20 is assembled in the axonometric chart that remove the part of the sleeve of the Figure 16 on the blower motor assembly;
Figure 21 is positioned at the blower motor of base shell and the sectional view of sleeve assembly; And
Figure 22 is the partial perspective view of the variant of the flexible sleeve shown in Figure 16-21;
Figure 23 is the assembly exploded view according to the blower motor assembly of another embodiment;
Figure 24 is the sectional view of the blower motor assembly of the Figure 23 after assembling;
Figure 25 is the axonometric chart that is used for the first spiral case element of Figure 23 and 24 embodiment that illustrate;
Figure 26 is the axonometric chart from the first and second spiral case elements after the assembling of the embodiment of Figure 23 and 24 explanations;
Figure 27 is the axonometric chart of the assembly of Figure 26, but is in upside down position;
Figure 28 is another axonometric chart of the first and second spiral case elements after the assembling shown in Figure 26 and 27;
Figure 29 is the axonometric chart similar to Figure 28, but has rotated about 180 °;
Figure 30 is the axonometric chart similar to Figure 28, but the assembling after element in the counterclockwise direction slightly the rotation and to more vertical inclined position;
Figure 31 is the top cover that obtains from Figure 23 or the axonometric chart of overhead guard;
Figure 32 is the top cover of Figure 31 or the axonometric chart of overhead guard, but described lid or cover are in upside down position;
Figure 33 is the bottom that obtains from Figure 23 or the axonometric chart of end cover;
Figure 34 is bottom shown in Figure 33 or the upward view of end cover;
Figure 35 is the axonometric chart of the flexible sleeve that obtains from Figure 23; And
Figure 36 is another axonometric chart of sleeve shown in Figure 23.
The specific embodiment
A) general introduction
At first with reference to Fig. 1,2 and 3, generally include the motor body 12 with overhead guard 14 and end cover 16 according to the blower motor assembly 10 of exemplary embodiments.Therefore motor need not to describe in detail from as conventional design, it should be noted that in addition but output shaft (in Fig. 7 by central axis 48 expressions) is outstanding do not extend through overhead guard 14 and the end cover 16 of assembly from the relative top and bottom of motor.In this, it should be understood that here convenient such as quoting just when observing accompanying drawing of " top ", " bottom ", " top " and terms such as " bottoms ", and be not to be intended to carry out any type of restriction.
Before describing blower motor assembly 10 in detail, referring to base shell (or being called simply base) 24 accompanying drawing 5-7 and the 11-14 that describe to being suitable for holding blower motor assembly 10.The more details of base 24 can be that the application number of submitting on May 4th, 2005 is to find in 10/533,840 the U.S. Patent application, and its full content is by being incorporated herein by reference.More particularly, the blower motor assembly can be supported on the lower wall 26 of base 24 by a plurality of helical springs 28 (having illustrated one in Fig. 1,2).Used in the exemplary embodiment three such springs, but the number of this spring and configuration can change.Spring 28 is installed in the cave mouth (pocket) or recess (recess) 30 (seeing Fig. 5 and 14) in the lower wall 26 that is formed at base 24, the similar cave mouth of aiming at or recess 31 (the seeing Figure 15) engagement of the upper end of spring and bottom 16 downsides that are positioned at blower motor assembly 10.
Air induction conduit 32 (seeing Fig. 7) in the base 24 is to blower motor assembly 10 air feed, and when blower motor assembly 10 was installed in the base fully, exhaustor 34 was connected to the air vent 20 of blower motor assembly 10.
After blower motor assembly 10 inserted bases 24, base cover 38 (Fig. 7 and 11-13) is positioned at blower motor assembly top, the upper, open end of closed base.
By above-mentioned general introduction, now with in more detail element and the operation of tracing device.
B) blower motor assembly
It should be noted, the blower motor assembly 10 shown in Fig. 1-3 is slightly different from the blower motor assembly 110 of Fig. 4-7 and 11-14 herein.Assembly shown in Fig. 1-3 has different parts, wherein some part can relate to the consideration of manufacture view and may or can not appear in the assembly shown in Fig. 4-7 and the 11-14, vice versa, particularly for blower motor body, overhead guard and end cover.In this, the outer member of the blower motor assembly among Fig. 4-7 and the 11-14 by to Fig. 1-3 in employed similar Reference numeral represent, but added prefix " 1 ".Therefore, can think that assembly 10 and 110 is different embodiment, although they are similar on population structure and function.In addition, simultaneously for purpose of the present disclosure, should think that the inner member of blower motor assembly 10 and 110 is basic identical.
Especially with reference to Fig. 7 and 11-13, blower motor assembly 110 comprises and being formed with by lower wall 42, medial wall 44 and the motor housing (cap) of main body 112 or the motor body 112 of end shield (end bell) 46 internal cavities that limit 40.Motor coil and armature (not shown for clarity) are fixed in the motor body 112 in a usual manner, and schematically extend through in the opposite direction motor housing 46 and the lower wall 42 of main body 112 with the output shaft of 48 expressions.Housing 46 and lower wall 42 can comprise the suitable support of bearing that is used for axle.It should be noted, motor housing 46 engages with the upper outer edges 52 of motor body 112, and engages with the inner circular bead 58 of overhead guard 114 via lateral flange 54 and vertical antelabium 56.Space 60 between motor housing 46 and the blower motor assembly overhead guard 114 (being also referred to as " the first spiral case " herein) is occupied by first order impeller 62, and first order impeller 62 is fixed to the upper end of motor output shaft 48 via center hub or lining (bushing) 50.
The overhead guard 114 of blower motor assembly comprises respectively top 74 and bottom 76.Top can be consisted of and had roughly inverted cup-shaped and central opening or hole 118 by the plastics of relative hard or other suitable light material, and air is supplied with first order impellers 62 by central opening or hole 118.The bottom 76 of overhead guard is sagging edge shape, and is attached to the top 74 at contiguous shoulder or edge 58 by adhesion or any other suitable mode.Bottom 76 preferably is made of flexible polymer or the elastomeric material (for example, silicone rubber) that the medial wall 36 that can make at 78 places 114 pairs of bases 24 of overhead guard seals.The importance of this seal arrangement will be further described hereinafter.
C) impeller
C1) the two shield impellers of the first embodiment-alternative expression
First and second grades of impellers 62,72 can have identical design (although must be mirror image geometry in order to adapt to the present embodiment), therefore only impeller 62 are described in detail.With reference to Fig. 8-10, although can use other suitable material and manufacturing technology, impeller 62 is single-piece molding plastic construction especially.Impeller 62 comprises the curved or rectilinear wheel blade of a plurality of Curved Continuous that are clipped between a pair of plate- like shield 90,92 or blade 88.Less shield 92 has merged hub or the lining 50 of the upper end that holds motor drive shaft 48.Shield 92 is overlapping with the inside of wheel blade 88, that is, and and the basic OD less than larger shield 90 of the external diameter of less shield (OD).Larger shield 90 is formed with relatively large central opening 94, but this shield extends to the radially outer top of wheel blade.Make the OD of less shield 92 be slightly less than the diameter of the central opening 94 of shield 90, simplified the moulding process (being easy to the single-piece molding by allowing impeller) for the manufacture of impeller.
By using the shield (specifically, only having a shield in the outside of impeller) of different size, impeller 62,70 inertia reduce and the overall stiffness of impeller remains unchanged.In this, impeller 62,70 the two all preferably consist of (rear a kind of material provides the acoustic damping characteristic that suppresses impeller resonance) by Merlon or polypropylene material.If necessary, can be with the glass fiber-reinforced rigidity that increases polypropylene and Merlon.
The width of the radially outer 96 of wheel blade or blade 88 reduces gradually and laterally apical margin 98 can be stepped, sees the most clearly among Figure 10.Each wheel blade can have the profile that is suitable for re-set target, and described profile can reduce gradually.For example, each wheel blade can reduce in plane graph (namely gradually, the edge thickness of each wheel blade can reduce to narrower width from larger width from inside to outside gradually), and/or each wheel blade can reduce (that is, each wheel blade can be from inside to outside from larger height to reducing gradually than low height along the height of length) gradually in front view.This can reduce gradually to realize by wheel blade or the blade edge that makes contiguous small diameter shield, thereby makes at least the radially outer of blade be decreased to less width at the radial outer end of impeller.In addition, the section thickness of wheel blade can change or reduce gradually.The purpose of these wheel blade features is noise decreases, and the concrete effect of stepped edge is the pressure pulse that disperses around the wheel blade top.In selectivity embodiment, the trailing edge of impeller blade can be disturbed to destroy by other, such as but not limited to depression or roughing.This interference can be decomposed the smooth air of trailing blade edge and be helped noise decrease.
At Figure 10-7 to an embodiment of 10-9 explanation, the edge surface 88.3 of the less shield 92 of extend through and laterally the impeller between the apical margin 98 the top chamfering or generate transitional surface 99 by otch (notched) thereby on the top.The example of transitional surface comprises straight line chamfering 99.1 (Figure 10-7), protruding chamfering, for example arch 99.2 (Figure 10-8), or recessed otch 99.3 (Figure 10-9).
Shown in Figure 10-10, the gravel size decision of chamfering or otch from make by the plane of extending horizontal apical margin 98 and edge surface 88.3 places its imaginary corner that intersect to form along each edge (98 and 88.3) size between 0.5-5mm, the preferred 2mm that is about.Size along every edge does not need identical.
The chamfering of described wheel blade or otch are intended to further noise decrease, comprise that reducing wheel blade rotates sound.
Outside or the outer surface of end cover 16,116 also are provided with a plurality of fixed blades 100, and as shown in figure 15, a plurality of fixed blades 100 can two one group be set to three groups, but also can implement other layout.Before making gas inflow second level impeller 72, these wheel blades are used for reducing the degree of gas turn or rotation, will further describe herein.
C2) the two shield impellers of the second embodiment-taper alternative expression
Figure 10-1 has illustrated impeller 62.1 according to optional design of the present invention to 10-6.As the impeller 62 shown in Fig. 8-10, impeller 62.1 comprises alternative expression shield design, but in addition, this impeller is tapered in front view, and for example, the height of each wheel blade changes or reduces gradually along its radical length, shown in Figure 10-1 and 10-6.Each wheel blade also can reduce on width gradually, as shown in plane graph.This taper alternative expression shield impeller has the advantage (cost is low, inertia is little with preferably balance) of alternative expression shield impeller and the advantage of disk of conical profile (by the radial air flow velocity of impeller more consistent and thereby have the efficient of lower noise and Geng Gao) concurrently.As less important benefit, taper alternative expression shield design also provides excellent rigidity and to the resistance of crooked, sagging or " creep ".
As mentioned above, impeller 62.1 has conical design and comprises the curved or linear wheel blade of a plurality of Curved Continuous that are clipped between a pair of plate-like shield 90.1,92.1 or blade 88.1.Each wheel blade 88.1 comprises the first edge 88.2 and the second edge 88.3.The radially outer 88.4 at each edge 88.2 (Figure 10-4) in abutting connection with or contact or near the inner surface of shield 90.1, and the inner radial 88.5 at the edge 88.2 of each wheel blade (Figure 10-5) further inwardly radially extends beyond shield 90.1 and by opening 90.2 (being also referred to as " minor diameter " of shield 92.1) as seen.On the contrary, the inner radial at each edge 88.3 in abutting connection with or contact or near the inner surface of shield 92.1, and the further outward radial of radially outer at every edge 88.3 of each wheel blade extends beyond shield 92.1, in Figure 10-1 as seen.In described example, produce conical design by the shield 90.1 that forms frusto-conical, and shield 92.1 (the seeing Figure 10-6) on plane normally.Wheel blade 88.1 between the shield is configured as in the space that is suitable for being installed between the shield, thereby the inner radial of wheel blade along the larger diameter shield from impeller is tapered to radially outer.
The corresponding minor diameter 90.2 of truncated cone and major diameter 90.3 form with respect to shield 92.1 angled skew walls 90.4.Angle α is preferably between 10-30 ° according to practical application in 0-60 ° scope.On the contrary, the shield among Fig. 8-10 extends in substantially parallel plane, although it may have different thickness.Less shield 92.1 has merged hub or the lining 50.1 of the upper end that holds motor drive shaft 48.Shield 92.1 is overlapping with the inside of wheel blade 88.1, that is, and and the basic OD less than larger shield 90.1 of the external diameter of less shield 92.1 (OD).Shield 90.1 is formed with the opening 90.2 of the inner radial of failing to cover wheel blade, but shield 90.1 extends to the radially outer top of wheel blade.So that the OD of less shield 92.1 has simplified the moulding process for the manufacture of impeller slightly less than the diameter of the central opening 90.2 of shield 90.1.
By using the shield (specifically only having a shield in the outside of impeller) of different size, the inertia of impeller 62.1 reduces and the overall stiffness of impeller remains unchanged.In this, impeller 62.1 preferably maybe can provide the polypropylene material of acoustic damping characteristic to consist of (rear a kind of material can suppress the resonance of impeller) by Merlon.If necessary, can be with the glass fiber-reinforced rigidity that increases polypropylene and Merlon.
The width of the radially outer 96.1 of wheel blade or blade 88.1 can reduce gradually and laterally apical margin 98.1 can be stepped, to shown in Figure 10-6 and/or Figure 10-7 to the otch shown in the 10-10 or chamfering 99 and mentioned above similar.
These wheel blade features are intended to noise decrease and the concrete effect of stepped edge is the pressure pulse that decomposes around the wheel blade top.In selectivity embodiment, the trailing edge of impeller blade can be disturbed to destroy by other, such as but not limited to depression or roughing.This interference decomposition is trailed the smooth air of blade edge and is helped noise decrease.
Impeller 62.1 firm equally (can per second rotating speed higher) even have lower inertia (responding faster) and may be also quieter than impeller 62 it typically is parallel arrangement.In addition, because its design, impeller 62.1 can be made single part.
Taper alternative expression shield embodiment cost is low, has good balance, very low inertia, low noise and high strength.Use the design of taper shield with material still less.Conical design can also cause more level and smooth gas flow rate, for example, makes speed keep constant between the radial inner end of wheel blade and outer end.
Compare with single shield impeller, impeller top and the gap between the top cover of two shield impellers are less sensitive to tolerance.On single shield (or opening) impeller, if top cover is relatively far away, because air can flow through the top of blade, the top clearance is very responsive to deviation.
D) spiral case
Get back to Fig. 7 and 11-13, can see that the space 60 (encapsulated first order impeller 62 and comprised just regional at the annular volute in the impeller outside) that upper (or outer) side by the downside of overhead guard 114 and motor housing 46 forms defines the first spiral case.Leaving the first spiral case 60 (high-speed region) afterwards, air along the inter-stage of the entrance 104 that leads to blower motor body bottom 116 (namely, level is to level) path 10 2 advances, inter-stage path 10 2 be in the zone between the inwall 36 of its outer peripheral edge 64 of blower motor body 112 and base 24 radially outward and the downward passage that spirals.Described air inlet is filled with by the first impeller 62 superchargings in the first spiral case 60 and via inter-stage (level is to level) path 10 2 and is sent to the air of second level impeller 72 and the second spiral case 70, and wheel blade 100 makes the gas steady (going to revolve) that flows into entrance 104.
As mentioned above, the second spiral case has been by having encapsulated second level impeller 72 and having extended at the spiral path that makes progress between the corresponding outer wall 64 of motor case and inwall 44, leads to air vent 20,120 cavity or space 70 limit.
It should be understood that having coaxial nested inter-stage (level is to level) path 10 2 in the first spiral case 60 and the second spiral case 70 outsides has saved the overall dimension of blower motor assembly considerably, therefore can be installed in than in the small footprint.
The first and second spiral cases can have similar or different shapes.Yet the first spiral case can be called as " downward-sloping (ramp down) ", and the second spiral case can be called as " (ramp up) is inclined upwardly ".It is level and smooth that each angled profile is preferably, but each angled profile also can have the gradient of classification.
E) operation
Be in operation, take embodiment or Fig. 4 to 15 as example, gas (normally air or oxygen) is provided for blower motor assembly 110 via conduit 32 and hole 33.Then, air is drawn through and into first order impeller 62 by entrance 118.Impeller makes the air rotation and makes gas boosting in conjunction with the first spiral case 60.Gas leaves after the deceleration of the first spiral case, flows in the downward spiral of inter-stage (level is to level) path 10 2, moves in the space between motor body 112 and the base wall 36.It should be noted, the sealing member at 78 places between motor body overhead guard 114 and the base wall 36 prevents that pressurization gas from revealing and gets back in the non pressurized zone of entrance 118 tops.The flexible nature of sealing member also helps the blower motor assembly isolated in vibration with respect to base shell.
Now, the gas that is guided by fixed blade 100 flows in the second impeller 72, and the second impeller 72 and 70 combinations of the second spiral case further make gas boosting until gas arrives motor body assembly outlet 120 and discharges via base exhaustor 34.
Although aerator described herein can be used in CPAP, NIPPV and the BiLevel (Bi-level positive airway pressure of OSA, bi-level positive-pressure non-invasiveventilation) in the treatment, it should be noted, described aerator also is convenient to for or is suitable for together use with the wound ventilation is arranged.
F) selectivity flexible sleeve embodiment
In the selectivity layout, by 202 encapsulation of cup-shaped flexible sleeve, Figure 16 to 19 sees the most clearly the blower motor assembly 200 (Figure 20,21) similar to assembly mentioned above substantially.Sleeve 202 comprises peripheral sidewall 204 and lower wall 206.The lower wall 206 of sleeve can be formed with interior curve wheel blade 208, and wheel blade 208 is with the second level entrance of the mode similar to the layout of above-mentioned wheel blade 100 around the blower motor assembly.Wheel blade 208 preferred and lower wall 206 whole formation still, if necessary, also can be used by for example suitable adhesion discretely.As in the above-described embodiments, wheel blade can also be formed at the downside of cover at the bottom of the blower motor assembly.The circular recess 212 interior global formations of a plurality of legs 210 that illustrate in being formed at lower wall 232.Another kind of support arrangement can be a large cylindrical web (web) 211 on the bottom outer surface 233 of sleeve, as shown in figure 22.
The peripheral sidewall 204 of sleeve 202 is circular substantially in cross section, but 218 either side has a pair of " plane " 214,216 that is suitable for holding air vent connection bump section 220 (seeing Figure 200) in the hole.The upper end of sleeve can be formed with and limit the diameter parts that reduces that is connected to the top edge 222 on the adjacent residue sleeve part by shoulder 224 radially.It should be noted, be combined with the main part of sidewall 204 at 214,216 places on the plane in edge 222, and 226,228 places stop in the position thereby make shoulder 224.Edge 222 stops at inner circular flange or antelabium 230 places of the radially inner side that is positioned at edge 222.It should be understood that at other of sleeve openings end and be equal to attachment and/or seal arrangement also within the scope of the invention.
When the motor body used shown in Figure 20 and 21, the edge 222 of sleeve engages with the peripheral edge of overhead guard 232 with elastic type closely, and antelabium 230 is installed in the circular trough 234 of described cover.This resilient engagement provides enough sealings to leak from the space between motor body and the sleeve to prevent air/gas.
Figure 21 has illustrated the blower motor assembly that is positioned at base shell 238.It should be understood that, when pressurization gas/air when (radially between blower motor assembly 200 and flexible sleeve 202) between 1 grade and the 2 grades of spiral cases flows, flexible sleeve can radially outward expand in case at least with inwall 240 local engagement of base shell 238.Under this condition, still can completely cut off vibration by the air cushion of sleeve inner.Therefore in other words, the inter-stage gas/air of supercharging is at least with the mode of isolated vibration support drum blower fan motor sub-assembly partly, also can cushion simultaneously motor with prevent motor operate roughly and the processes such as transportation in destroyed.In this, elastic force and flexible boot 210 replaces springs 28, therefore eliminated to be difficult to the dispersive element that operates and assemble.
Hole 236 (Figure 17) in the shoulder 224 is for the electric wire that is connected with the blower motor of motor body.Optionally, the otch relative with hole 218 can be set in upper lip or edge 222.
Now, because interstage air/gas plays two effects in a space, that is, and gas channel and vibration isolation and damping of shocks element between at different levels, the incorporating into so that the size of blower motor assembly is reduced of flexible sleeve.In addition, because more space is used as the intake noise reduction capacity, can make this equipment quieter.As indicated above, another advantage is the flexible sealing section 76 of having removed overhead guard.
G) selectivity blower motor assembly embodiment
Figure 23 is the decomposition view of another selectivity embodiment that comprises the blower motor assembly 242 of the first order impeller 244 that combines with the first spiral case element (being also referred to as motor housing or end shield herein) 246 and the second level impeller 248 that combines with the second spiral case element (being also referred to as the motor body herein) 250.So the blower motor assembly can be axially stacking can automatic Composition.In addition, as mentioned below, the spiral case element is axially gone up compact, and is clipped between loam cake and the lower cover.
The first and second spiral case elements 246,250 link together, and motor M is therebetween.For example, the first spiral case element 246 can comprise that a plurality of holes 252 are provided with screwed hole be used to the aligning that holds screw 254 to hold for the first spiral case element being fixed on screw 254, the second spiral case elements on the second spiral case element.Optionally, or additionally, the second spiral case element 250 can be connected on the first spiral case element 246 with adhering, perhaps the first spiral case element can be fitted on the second spiral case element.
The rotor 256 of motor is between spiral case element 246 and 250, and this rotor comprises the first axle head 258 that is connected with the first impeller 244 and axially aligned the second axle head 260 that is connected with second level impeller 258.Top cover or overhead guard 262 comprise entrance 264 and are positioned at the first impeller top, and bottom or end cover 266 are positioned at second level impeller 248 belows and contiguous second level impeller 248.Bottom comprises a plurality of wheel blades 268 around entrance 270.Therefore, top cover or overhead guard 262 and the first spiral case element 246 together define cavity or the first spiral case 247 (Figure 24) that is provided with the first impeller 244, and the downside of bottom or end cover the 266 and second spiral case element 250 together defines lower wall 253 belows that another cavity of being provided with the second impeller 244 or the second spiral case 251, the second spiral cases 251 are located immediately at the second spiral case element 250.The below will describe the inter-stage gas passage between the first and second spiral cases in more detail.
Flexible motor sleeve 272 (Figure 23,24,35 and 36) is substantially around whole assembly, but comprises the outlet 276 of cut portion 274 to hold the second spiral case element 250.Sleeve 272 is to suppress the vibration of inner member and/or the flexible member of resonance.The use of sleeve 272 can cause comparing with common motor sub-assembly parts still less.Sleeve 272 can be on aluminum insert molding, perhaps can common molding on top cover and/or bottom.
Figure 24 show motor M other part and with the position relationship of the first and second spiral cases.Motor M comprises lamination 278, a plurality of coil 280 and rotor magnet 282.Motor drive shaft 284 (it comprises axle head 258,260) is supported by metal (upper 286,288.In addition, spiral case element 246,250 at least part of nested, this provides compact and the design of joint space-efficient, and especially in the axial direction, and sleeve 272 also helps diametrically conserve space.Sleeve 272 is combined with motor sub-assembly hermetically, for example uses the silicones thickened section 290 around its upper surface, and shown in Figure 24 and 33, the silicones thickened section is around the Elongation of Edge of top cover or overhead guard 262.
Figure 25 shows the first spiral case element 246 with the inclined-plane with part annular 292 that limits gas channel 294, and this gas channel 294 is held to " outlet " 298 modes that increase gradually of holding from 296 passage " entrance " with its degree of depth and extended about 180 °.Figure 26-30 description taken in conjunction the first and second spiral case elements 246,250 together, and do not have motor.These figure have illustrated gas from the first impeller 244 to second impellers 248, thereby also are the inter-stage passages from 251 circulations of the first spiral case 247 to second spiral cases.This inter-stage passage is coaxial with respect to motor drive shaft 284 substantially, and defines the transition region under being designed to be tilted in a spiral manner from the first spiral case to the second spiral case.More particularly, two initial arrows are arranged on the surface 292 of passage 294 of the first spiral case among Figure 26, and the 3rd arrow is positioned on the inclined-plane that more sharply tilts in the second spiral case 250 outsides, next, this inclined-plane continues to extend along the surface 302 of basic horizontal, is equally on the second spiral case element 250.
This layout is so that gas deceleration when being tilted to lower and expanding.It should be noted that, groove 304 is formed between the downside of surface the 302 and first spiral case element 246 now.This groove narrows down in a circumferential direction gradually, and rise so that impelling to be retained in centers on forward serial movement of spiral case element 250 with any gas that slows down in the first spiral case 246 in the inter-stage passage slightly towards the first spiral case 246 in surface 302, and that sees in Figure 28-30 is the most clear.Otch 255 in the inwall 257 of the second spiral case 250 allows motor electric wire (not shown) to pass through.
In use, gas spirals downwards by transition region and enter the zone 306 of extending equally below bottom or end cover 266, then enters in the opening 270, enters afterwards the second spiral case 251.Wheel blade 268 reduces to flow into the degree of turn or the rotation of the gas in the second spiral case, afterwards gas via the second impeller 248 around spiral case 251 turns and rise to outlet 276.
Shown in Figure 23 and 31, top cover or overhead guard 262 comprise flat upper surfaces 307 and the peripheral sagging edge 308 that is provided with entrance 264.Outlet protective cover 310 is sagging and cover transition region between the first and second spiral cases from the part of outer rim 308, so that gas is radially outward mobile to be full of level to level passage or inter-stage passage.Brace (attachment tab) 312,314 and 316 is used for top cap is received the downside of the first spiral case element 246.
With reference to Figure 23,24,33 and 34, bottom 266 is formed with upright brace 314,316 and 318 at the edge 320 that is suitable for engaging with peripheral edge 322 on the second spiral case element 250 equally.The first spiral case element 246 is fixed firmly on the second spiral case element 250 via screw fastener 254, and top cover and bottom 262,266 fasten on the second spiral case element 250, perhaps otherwise be connected respectively to the first and second spiral case elements, it should be understood that the assembling that is easy to realize dense parts.In Figure 23,24,35 and 36, see the most clearly, flexible sleeve 272 telescopicallies hold motor/spiral case assembly so that further gas passage between restricted class, embodiment in conjunction with Figure 21 explanation as indicated above, and similar to the embodiment shown in Figure 16 to 21 with the method for operation of motor sub-assembly in conjunction with the described sleeve drum blower fan of Figure 23 to 36.
About impeller 244 and 248, each blade can be tapered towards the outside of impeller, for example, from otch vertically the moving blade top to reduce the out-of-date sound of vanes.When outwards moving from the center of impeller, this structure also can make cross section remain near constant.This can promote air-flow keep with blade contact to increase efficient and/or reduction noise.In another variant, the surface of the adjacent impeller of parts can be the shape of taper with the coupling impeller, thereby makes the constant distance between those surfaces and the impeller blade edge.As mentioned above, impeller 244,248 has the design of alternative expression shield equally, and it helps to reduce noise equally.
The motor sub-assembly of describing thus has low inertia, and it can be used as other application, for example, and the response that responds fast other treatment and/or improve sensor.In addition, because the speed of motor running is lower, the temperature of motor is lower, and is also less from the resistance of bearing heat, and this helps to improve reliability.Similarly, whole spiral case can help to conduct heat with heated air in air duct, and this has the effect that improves the motor reliability equally.In addition, the heat of generation can the heated air passage, and this is favourable under colder condition.Another benefit is that the result of multi-staged air passage is less through the pressure of bearing.
H) supplementary features
In another changes, can have a kind of operational mode, wherein vibration occurs with faster than breathing rate in air-flow by motor wittingly.The result is useful for diagnostic purpose, for example, determines to open or close air channel or is used for other diagnostic purpose.Be to have described suitable oscillation technology in 5,704,345 the United States Patent (USP) in the total patent No..This information can be used in the activation active exhaust port equally.
Thermal cutout can be arranged on the motor.Interrupter can be monitored the heat in the motor shell, and cuts off the electricity supply when overheated.
In another embodiment, each impeller can be constructed to rotate at equidirectional or rightabout.
In another changed, blower assembly comprised the port for water outlet, and such as the hole of sleeve bottom, if water refluxes from the humidifier that is connected, this port can prevent that sealing accumulates in the bottom of motor.
In addition, motor shell and the first and second spiral case elements can be one.
It seems at present it is that the most practical and preferred embodiment have been described the present invention although be combined in, it should be understood that, the present invention is not limited to published embodiment, and on the contrary, embodiment is intended to cover the various modifications that are included in the spirit and scope of the present invention and equal layout.For example, although a plurality of scheme of the present invention relates to double end or multistage blowers (two-stage or multistage), the one pole aerator is also among considering.On the other hand, each end of motor drive shaft can comprise a plurality of impellers.Similarly, above-mentioned various embodiment can realize in conjunction with other embodiment, and for example, the scheme of an embodiment can be in conjunction with the scheme of another embodiment to realize still unaccounted other embodiment.In addition, each parts or the feature that only are used for any embodiment that provides can form independent embodiment.In addition, although the present invention has application-specific to the patient who suffers from OSA, it should be understood that and suffer from Other diseases the patient of (for example, congestive heart failure, diabetes, morbid obesity, apoplexy and obesity surgery etc.) also can benefit from above-mentioned technology.In addition, above-mentioned theory has same practicality to patient and non-patient in non-medical applications.
Claims (44)
1. double-ended drum blower fan comprises:
The blower motor assembly, it supports relative the first axle head and the second axle head, described the first axle head and the second axle head have be connected respectively on it and be enclosed in respectively the first spiral case and the second spiral case in the first impeller and the second impeller, wherein said the first spiral case is connected to the first entrance and described the second spiral case is connected to the second entrance and exit; Described blower motor assembly is supported in the base shell;
Radially outer inter-stage passage, it is between described the first spiral case and the second spiral case, wherein said the second spiral case is coaxial nested substantially with radially outer inter-stage gas passage at least in part, and wherein said the first spiral case and the second spiral case are between described the first entrance and the second entrance.
2. double-ended drum blower fan as claimed in claim 1, wherein said blower motor assembly is supported on a plurality of elastic components, separates with described base shell in addition, thereby makes the substantially isolation in vibration of described blower motor and described base shell.
3. double-ended drum blower fan as claimed in claim 1, wherein said blower motor assembly comprises the motor body, described motor body comprises lower wall, peripheral sidewall, motor housing, overhead guard and end cover, in first space of wherein said the first impeller between described motor housing and described overhead guard, in the second space of described the second impeller between described lower wall and cover of the described end.
4. double-ended drum blower fan as claimed in claim 3, wherein said the second spiral case is positioned at the radially inner side of described inter-stage passage.
5. double-ended drum blower fan as claimed in claim 4, wherein said the first spiral case is positioned at the radially inner side of described inter-stage passage.
6. double-ended drum blower fan as claimed in claim 5, wherein said the second spiral case integral body is positioned at described motor body.
7. double-ended drum blower fan as claimed in claim 4, the downside of the described lower wall of wherein said blower motor assembly is provided with a plurality of fixed blades that revolve be used to the air that enters described the second spiral case is gone.
8. double-ended drum blower fan as claimed in claim 3, wherein said overhead guard is provided with and is used to described the first impeller that the entrance of non pressurized gas is provided, and described entrance is communicated with air inlet fluid to described base shell.
9. double-ended drum blower fan as claimed in claim 3, wherein said overhead guard is provided with the flexible seals that engages with the inner wall surface of described base shell.
10. double-ended drum blower fan as claimed in claim 9, wherein said flexible seals radially are divided into described base shell the two parts that comprise the first non pressurized part and the second supercharging part.
11. such as each described double-ended drum blower fan in the claim 1 to 10, wherein each impeller is included in a plurality of wheel blades that reduce gradually on the width of its radially outer.
12. double-ended drum blower fan as claimed in claim 11, wherein each wheel blade has the staged transverse edge at its radial outer end.
13. double-ended drum blower fan that comprises the blower motor assembly, described blower motor assembly supports the axle that has the first axle head that is provided with the first impeller and be provided with the second axle head of the second impeller, and described the first impeller and the second impeller are packaged in the first spiral case and the second spiral case; Described blower motor assembly is supported in the base shell and comprises the motor body, and described motor body comprises lower wall, peripheral sidewall and overhead guard, and wherein said overhead guard is provided with the flexible seals that engages with the inwall of described base shell, and
Wherein said the first spiral case is connected to the first entrance and described the second spiral case is connected to the second entrance and exit, and described the first spiral case and the second spiral case are between described the first entrance and the second entrance.
14. double-ended drum blower fan as claimed in claim 13, wherein said blower motor assembly are supported on a plurality of elastic components between the bottom of the lower wall of described base shell and described blower motor assembly.
15. double-ended drum blower fan as claimed in claim 14, wherein said a plurality of elastic components comprise a plurality of helical springs, and each described helical spring is installed in the corresponding cave mouth of lower wall of described base shell.
16. double-ended drum blower fan as claimed in claim 13, wherein said flexible seals is comprised of silastic material.
17. double-ended drum blower fan as claimed in claim 13, wherein said overhead guard comprise the top of being made by the substantially rigid plastic material and have merged the bottom of described flexible seals.
18. double-ended drum blower fan as claimed in claim 13, wherein said blower motor assembly is provided with the first air inlet and first row QI KOU, and wherein said base shell is provided with the second air inlet that is communicated with described the first air inlet and the second row QI KOU that is communicated with described first row QI KOU, and wherein described at least first row QI KOU is formed by flexible polymeric materials.
19. double-ended drum blower fan as claimed in claim 18, wherein said base shell is made of metal.
20. double-ended drum blower fan as claimed in claim 19, wherein said motor body and inner housing are made of heat-conducting metal.
21. double-ended drum blower fan that comprises the blower motor assembly, described blower motor assembly supports relative the first axle head and the second axle head, described the first axle head and the second axle head have the first impeller and the second impeller that is connected respectively on it, and described the first impeller and the second impeller are packaged in the first spiral case and the second spiral case; Each impeller has the wheel blade of a plurality of bendings, and each wheel blade reduces on the width of its radially outer gradually,
Wherein said the first spiral case is connected to the first entrance and described the second spiral case is connected to the second entrance and exit, and described the first spiral case and the second spiral case are between described the first entrance and the second entrance.
22. double-ended drum blower fan as claimed in claim 21, wherein each wheel blade its radially outermost end have the staged transverse edge.
23. double-ended drum blower fan as claimed in claim 21, wherein each impeller is made of makrolon material.
24. double-ended drum blower fan as claimed in claim 21, wherein each impeller is made of polypropylene material.
25. such as each described double-ended drum blower fan in the claim 21 to 24, wherein said blower motor assembly comprises the motor body with lower wall and housing, described the first impeller is between described housing and overhead guard, and described the second impeller is between described lower wall and end cover.
26. double-ended drum blower fan as claimed in claim 21, wherein each impeller forms surface disturbance along its trailing edge.
27. a double-ended drum blower fan comprises:
Blower motor, it comprises the first axle head and the second axle head that relatively extend that supports respectively first order impeller and second level impeller;
The first spiral case element and the second spiral case element are positioned at the opposite side of described motor and fastened to each other;
Be connected to top cover or the overhead guard and the bottom that is connected to described the second spiral case or end cover of described the first spiral case, described the first spiral case element and described top cover or overhead guard limit the first spiral case that described first order impeller has been installed in it, described the second spiral case element and described bottom or end cover limit the second spiral case that described the second impeller has been installed in it, described the first spiral case be connected spiral case by with described the first axle head be connected axle head substantially coaxial nested spiral inter-stage gas passage be connected
Described the first spiral case is connected to the first entrance and described the second spiral case is connected to the second entrance and exit, and described the first spiral case and the second spiral case are between described the first entrance and the second entrance.
28. double-ended drum blower fan as claimed in claim 27, wherein said top cover or overhead guard are provided with the air inlet of contiguous described first order impeller.
29. double-ended drum blower fan as claimed in claim 27, wherein each impeller has the wheel blade of a plurality of bendings, and each wheel blade reduces on the width of its radially outer gradually.
30. double-ended drum blower fan as claimed in claim 27, wherein each impeller comprises:
The top shield;
The bottom shield,
A plurality of wheel blades that extend to described bottom shield from described top shield, each described wheel blade comprises the apical margin in the inner radial of described wheel blade that contacts with described top shield, and the root edge at the radially outer of described wheel blade that contacts with described bottom shield, thereby the inner radial at the described wheel blade at the described root edge place of each wheel blade is not contacted or contiguous described bottom shield, and do not contact or contiguous described top shield at the radially outer of the described wheel blade of the described upper edge of each wheel blade.
31. double-ended drum blower fan as claimed in claim 30, wherein the width that has of each described wheel blade is bordering on constant from described inner radial to described radially outer.
32. double-ended drum blower fan as claimed in claim 30, wherein the edge thickness that has of each described wheel blade and/or height change to described radially outer from described inner radial.
33. double-ended drum blower fan as claimed in claim 32, wherein said edge thickness and/or height are to reduce gradually downwards from described inner radial to described radially outer.
34. double-ended drum blower fan as claimed in claim 27, wherein said top shield is frusto-conical, has with respect to the angled surface of shield, described bottom, and angulation is in 15 to 25 degree scopes.
35. double-ended drum blower fan as claimed in claim 27, wherein said inter-stage gas passage is included in the inclined plane of described the first spiral case element internal, and the peripheral surface of described inclined plane on described the second spiral case element is combined.
36. double-ended drum blower fan as claimed in claim 35, the hood-shaped one-tenth in wherein said bottom or the end are useful on the second entrance that gas is supplied to described the second spiral case from described inter-stage gas passage.
37. double-ended drum blower fan as claimed in claim 35, wherein the described peripheral surface on described the second spiral case element forms an in a circumferential direction part of tapered peripheral grooves.
38. such as each described double-ended drum blower fan in the claim 27 to 37, further comprise flexible sleeve, described flexible sleeve encapsulates described aerator basically, and forms at least a portion of the interstage air passage between described the first impeller and described the second impeller.
39. further being provided for the vibration of described aerator, double-ended drum blower fan as claimed in claim 38, wherein said flexible sleeve support.
40. a double-ended drum blower fan comprises:
The blower motor assembly, it comprises the motor body of the axle that is constructed to support the second axle head that has the first axle head of being provided with the first impeller and be provided with the second impeller, and described the first impeller and the second impeller are packaged in the first spiral case and the second spiral case; And
Base shell, it is constructed to support described blower motor assembly,
Thereby the sidewall of wherein said motor body and described base shell limits the gap and sets up the inter-stage gas passage, and
Wherein said the first spiral case is connected to the first entrance and described the second spiral case is connected to the second entrance and exit, and described the first spiral case and the second spiral case are between described the first entrance and the second entrance.
41. double-ended drum blower fan as claimed in claim 40, wherein said blower motor assembly is not closed among motor housing or the housing.
42. double-ended drum blower fan as claimed in claim 40, wherein said motor body comprises lower wall, peripheral sidewall and overhead guard, and wherein overhead guard is provided with the flexible seals that engages with the inwall of described base shell.
43. double-ended drum blower fan as claimed in claim 40, wherein said blower motor assembly are supported on a plurality of elastic components between the bottom of the lower wall of described base shell and described blower motor assembly.
44. double-ended drum blower fan as claimed in claim 40, wherein said blower motor assembly is provided with the first air inlet and first row QI KOU, and wherein said base shell is provided with the second air inlet that is communicated with described the first air inlet and the second row QI KOU that is communicated with described first row QI KOU, and wherein described at least first row QI KOU is formed by flexible polymeric materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310054938.7A CN103185027B (en) | 2005-10-28 | 2006-10-27 | Single-stage or multistage blowers and the air blower nested type spiral case and/or impeller |
Applications Claiming Priority (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US73087505P | 2005-10-28 | 2005-10-28 | |
| US60/730,875 | 2005-10-28 | ||
| US77533306P | 2006-02-22 | 2006-02-22 | |
| US60/775,333 | 2006-02-22 | ||
| US84120206P | 2006-08-31 | 2006-08-31 | |
| US60/841,202 | 2006-08-31 | ||
| PCT/AU2006/001617 WO2007048206A1 (en) | 2005-10-28 | 2006-10-27 | Single or multiple stage blower and nested volute(s) and/or impeller(s) therefor |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310054938.7A Division CN103185027B (en) | 2005-10-28 | 2006-10-27 | Single-stage or multistage blowers and the air blower nested type spiral case and/or impeller |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101296722A CN101296722A (en) | 2008-10-29 |
| CN101296722B true CN101296722B (en) | 2013-03-27 |
Family
ID=40066517
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200680040340.0A Active CN101296723B (en) | 2005-10-28 | 2006-10-27 | Blower motor with flexible support sleeve |
| CN200680040333.0A Active CN101296722B (en) | 2005-10-28 | 2006-10-27 | Single or multiple stage blower and nested volute(s) and/or impeller(s) therefor |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200680040340.0A Active CN101296723B (en) | 2005-10-28 | 2006-10-27 | Blower motor with flexible support sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN101296723B (en) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111140519A (en) * | 2011-02-25 | 2020-05-12 | 瑞思迈发动机及马达技术股份有限公司 | Blower and PAP system |
| CN103476448B (en) * | 2011-04-18 | 2017-09-01 | 瑞思迈发动机及马达技术股份有限公司 | PAP system blower |
| US10286167B2 (en) | 2011-07-13 | 2019-05-14 | Fisher & Paykel Healthcare Limited | Impeller and motor assembly |
| US10137264B2 (en) | 2011-07-13 | 2018-11-27 | Fisher & Paykel Healthcare Limited | Respiratory assistance apparatus |
| CA3108658A1 (en) * | 2012-02-02 | 2014-01-09 | Fisher & Paykel Healthcare Limited | Respiratory assistance apparatus |
| US10092716B2 (en) | 2012-03-06 | 2018-10-09 | Resmed Motor Technologies Inc. | Flow generator |
| JP5211302B1 (en) * | 2012-09-03 | 2013-06-12 | 株式会社メトラン | Blower |
| CN102937101B (en) * | 2012-11-21 | 2015-05-06 | 王卫 | Self-pressured low-pressure large-flow air pump |
| AU2013365897A1 (en) | 2012-12-18 | 2015-07-16 | Fisher & Paykel Healthcare Limited | Impeller and motor assembly |
| FR3002008B1 (en) * | 2013-02-11 | 2016-08-12 | Air Liquide Medical Systems | TURBINE FOR RESPIRATORY ASSISTANCE APPARATUS WITH IMPROVED GAS SEALING |
| FR3014320B1 (en) * | 2013-12-10 | 2017-08-25 | Air Liquide Medical Systems | MOTORIZED TURBINE BREATHING ASSISTANCE APPARATUS |
| FR3036143B1 (en) * | 2015-05-12 | 2019-07-05 | Air Liquide Medical Systems | IMPROVED MOTOR-MOTOR SEALANT MICRO-BLOWER FOR RESPIRATORY ASSISTANCE APPARATUS |
| CN105597208B (en) * | 2016-01-26 | 2019-01-04 | 北京怡和嘉业医疗科技股份有限公司 | A kind of ventilator |
| CN115006666A (en) * | 2017-02-14 | 2022-09-06 | 瑞思迈私人有限公司 | Impeller for a respiratory device |
| CN110545869B (en) * | 2017-04-10 | 2022-07-29 | 株式会社村田制作所 | Blower and fluid control device |
| CN114288513A (en) | 2017-04-23 | 2022-04-08 | 费雪派克医疗保健有限公司 | Breathing assistance apparatus |
| JP7119802B2 (en) * | 2018-09-11 | 2022-08-17 | 日本電産株式会社 | Air blower and air blower using the same |
| JP7259683B2 (en) * | 2019-09-26 | 2023-04-18 | 日本電産株式会社 | centrifugal fan |
| CN114183397B (en) * | 2021-10-25 | 2023-08-18 | 吉林大学 | High-efficiency backward centrifugal fan and design method thereof |
| CN115653918B (en) * | 2022-10-25 | 2024-01-26 | 江苏恒康机电有限公司 | High-temperature-resistant explosion-proof fan |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1432416A (en) * | 2002-01-08 | 2003-07-30 | 雷斯梅德有限公司 | Shunt for controlling pressure and flow rate inside CPAP equipment |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4797072A (en) * | 1987-06-19 | 1989-01-10 | Shop-Vac Corporation | Portable electric blower |
| US5893705A (en) * | 1996-12-13 | 1999-04-13 | General Electric Company | Integrated motor and blower apparatus having two back-to-back coupled rotors |
| AUPP826999A0 (en) * | 1999-01-21 | 1999-02-11 | Resmed Limited | A mounting arrangement |
-
2006
- 2006-10-27 CN CN200680040340.0A patent/CN101296723B/en active Active
- 2006-10-27 CN CN200680040333.0A patent/CN101296722B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1432416A (en) * | 2002-01-08 | 2003-07-30 | 雷斯梅德有限公司 | Shunt for controlling pressure and flow rate inside CPAP equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101296723A (en) | 2008-10-29 |
| CN101296723B (en) | 2013-01-23 |
| CN101296722A (en) | 2008-10-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101296722B (en) | Single or multiple stage blower and nested volute(s) and/or impeller(s) therefor | |
| CN103185027A (en) | Single or multiple stage blower and nested volute(s) and/or impeller(s) therefor | |
| ES2942856T3 (en) | Impeller and motor assembly | |
| US20090301485A1 (en) | Single or multiple stage blower and nested volute(s) and or impeller(s) thereof | |
| AU2013202608B2 (en) | Single or Multiple Stage Blower and Nested Volute(s) and/or Impeller(s) Therefor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: RESMED MOTOR TECHNOLOGIES INC. Free format text: FORMER OWNER: RAYSMEDD CO., LTD. Effective date: 20130524 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20130524 Address after: American California Patentee after: Resmed Motor Technologies, Inc. Address before: New South Wales Australia Patentee before: Raysmedd Co., Ltd. |
|
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: American California Patentee after: RESMED MOTOR TECHNOLOGIES INC Address before: American California Patentee before: Resmed Motor Technologies, Inc. |