• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a micro-blower (1) for a breathing apparatus comprising an electric motor (9) comprising a motor body (2) and a rotary shaft (3) of elongate shape, said motor shaft (3) being held or guided by at least one bearing device (8) arranged in said motor body (2), said motor shaft (3) passing through the upper wall (5) of the motor body (2) by a orifice (16) arranged in said upper wall (5) and projecting outside said motor body (2). A sealing piece (6) traversed by the motor shaft (3) is arranged at the orifice (16). Respiratory assistance apparatus equipped with such a micro-blower (1).
    公开号:FR3036143A1
    申请号:FR1554212
    申请日:2015-05-12
    公开日:2016-11-18
    发明作者:Hadrien Guiducci
    申请人:Air Liquide Medical Systems SA；
    IPC主号:
    专利说明:

    [0001] The invention relates to a micro-blower for a breathing apparatus whose gastightness has been improved and respiratory assistance device equipped with such a micro-blower. In order to assist certain patients in their respiratory function, respiratory assistance or assisted ventilation devices, also known as medical ventilators, are used which deliver respiratory gas with a non-zero flow rate and / or at a pressure greater than atmospheric pressure ( ie> 1 atm), typically air. The air sent to the patient may be supplemented with additional oxygen, especially when the patient must receive, as part of its treatment, a proportion of oxygen greater than 21% by volume. To do this, use of respiratory assistance devices using a micro-blower, sometimes simply called "blower" or "turbine", used to suck the ambient air and deliver it to a given pressure to patients. EP-A-2165078, EP-A-2102504 and WO-A-2012/139681 disclose micro-blowers and respiratory assistance apparatus equipped with such micro-blowers. Conventionally, the suction of the air by the micro-blower is done through one (or more) impeller arranged on a rotating shaft driven in rotation by an electric motor. The wheel of the micro-blower is generally arranged in a compartment arranged between a lower volute and an upper volute, fixed to one another, defining between them a hollow volume within which the wheel can turn, said wheel being taken in sandwich between said volutes. However, many micro-blowers have a problem of lifetime of the electric motor related in particular to a lack of gaseous sealing at the rotary shaft of the engine carrying the impeller. Indeed, the design of current micro-blowers does not ensure a seal between the rotating wheel compartment and the inside of the motor body where the bearings that hold or guide the rotary motor shaft 3036143 2 Gold, this lack of sealing is a significant problem because it leads to premature wear of the engine. Thus, it leads to pressurized air inlets (> 1 atm) in the engine body where there is a lower pressure (+/- 1 atm) due to the existing pressure differential. These pressurized air inlets will then come to sweep the bearings and to expel some of the lubricant therein, typically grease or the like, which will progressively lead to a lack of lubrication and inevitably accelerate wear. components in contact with each other, in particular bearings. In addition, when the ventilation of the patient is done with a flow of air enriched in oxygen, that is to say containing a proportion of oxygen greater than that of the ambient air, there is an aging even more rapid of these components, particularly bearings, because the oxygen present in the flow of leakage gas can then come oxidize the lubricants and reduce their efficiency and thus cause even faster wear of these engine components. In view of this, the problem which arises is to propose an improved micro-blower which does not have the aforementioned sealing problems at the motor shaft, making it possible to make the gas circuit completely watertight and thus to avoid leakage gas can not damage the motor bearings and lead to premature wear of the motor. The solution of the invention is then a micro-blower comprising an electric motor 20 comprising a motor body, that is to say defining, a motor compartment, and a rotary shaft-elongated form, said motor shaft being held or guided by at least one rolling device arranged in said motor body, said motor shaft passing through the upper wall of the motor body through an orifice formed in said upper wall and projecting outside said motor body, characterized in that a sealing member traversed by the motor shaft is arranged at the orifice. Depending on the case, the micro-blower of the invention may comprise one or more of the following technical characteristics: the motor body encloses and holds the bearings, the coils and the rotary shaft. The rotary shaft protrudes out of the motor body through a removable cover forming the upper wall of the motor body. the sealing member is held in position by a holding device. the holding device is a flange or the like. The sealing member is positioned in contact with the upper wall of the motor body. - The sealing piece (6) is formed of a deformable material capable of providing a fluidic seal, preferably the material is polytetrafluoroethylene (PTFE) or polyethylene (PE). 10 - the sealing piece is a piece of revolution. - The sealing piece is held in a fixed position relative to the motor shaft. - The sealing member is traversed by an internal passage having an inner diameter substantially equal to the outer diameter of the motor shaft, preferably the rotary motor shaft has an elongate tubular shape. The motor shaft carries a finned wheel, the sealing part being arranged between the upper surface of the motor body and the lower face of the finned wheel. the impeller is made of a light material, preferably of polymer, for example molded plastic. the sealing member is arranged in a housing provided in the upper wall of the motor body, the orifice opening into the bottom of said housing. the sealing piece is a rotary joint. - The impeller is fixed to the motor shaft so as to be rotated during rotations of said motor shaft, said motor shaft is itself rotated by the motor. The motor shaft is of elongated shape, in particular of tubular shape, for example cylindrical. - The impeller is arranged in a wheel compartment defined by an upper volute and a lower volute, fixed to one another. The upper volute comprises a gas inlet passage in fluid communication with the wheel compartment containing the impeller. This gas inlet passage allows a gas inlet, typically air or air enriched with oxygen, within the wheel compartment, said gas being sucked by the impeller, during its rotations. the upper volute and the lower volute form between them an outlet or gas outlet duct making it possible to extract the gas sucked by the impeller from the wheel compartment. - The upper volute is surmounted by a flag comprising an opening in fluid communication with the gas inlet passage of the upper volute. The invention further relates to a respiratory assistance apparatus equipped with a micro-blower according to the invention, as described above and illustrated hereinafter. Preferably, the respiratory assistance apparatus comprises a gas outlet to which a gas conveying conduit, such as a flexible hose, can be fluidly connected, for conveying the gas delivered by the turbine of the apparatus until to a patient interface, such as a respirator or the like, fluidly connected to the gas delivery conduit. The invention will now be better understood from the following detailed description given with reference to the appended figures in which: FIG. 1 is a view of 3/4 of a part of a micro-blower according to the present invention, FIG. 2 shows the micro-blower of FIG. 1 equipped with a finned wheel, FIGS. 3 and 4 are representations of the micro-blower of FIG. 2 in side view and in sectional side view. 5 is a sectional view of the micro-blower of FIG. 4; FIG. 6 is an enlarged view of a portion of FIG. 5; FIG. 7 is a sectional view of FIG. FIG. 8 is an enlarged view of the bearings of the micro-blower of FIG. 7, FIG. 9 is a slightly top view of a micro-blower of the invention. equipped with its scrolls, and - Figure 10 is a side view of the middle cross-fan of Figure 9.
    [0002] Figure 1 shows an embodiment, in view of 3/4, of a portion of a micro-blower 1 according to the present invention not equipped with the impeller, nor its volutes. This micro-blower 1 generally has the structure of a conventional micro-blower 1, as for example that illustrated in Figures 7 and 8. More specifically, it comprises a motor 9 (visible in Fig. 7) supplied with electric current. and delimited by a motor body 2 or housing, here cylindrical, defining a compartment or internal volume, also called engine compartment 19, enclosing a rotating shaft, coils / magnets and the other components of the engine 9. The engine 9 is controlled via electrical cables (not shown) or the like coming to connect to the lower end 2b of the motor body 2.
    [0003] The motor body 2 comprises, at its upper end 2a, a disc-shaped front flange 5 to which the lower volute 10 has just been fastened, as illustrated in FIGS. 7 and 8. The front flange 5 thus constitutes all or part of the wall or upper face of the motor body 2. The rotary shaft or shaft 3 of the motor 9 arranged in the motor body 2 protrudes from said motor body 2 at its upper end 2a through an orifice 16 formed in the upper face of the body motor 2, for example through the flange 5 in the embodiment 3036143 6 illustrated in Figures 7 and 8 wherein the upper wall of the motor body 2 is constituted by the flange 5 which forms a kind of cover at the end upper 2a of the motor body2. As can be seen in FIG. 2, this shaft 3 carries a finned wheel 4 and drives it in rotation during the operation of the engine 9, which makes it possible to draw air into the compartment 12 in which is arranged the wheel 4, which is formed between the upper scrolls 11 and lower 10. Figures 9 and 10 show the micro-fan 1 of Figure 2 equipped with its volutes 10, 11. The volutes 10, 11 over the motor body 2 9. The lower volute 10 bears on the lower surface 51D of the flange 5, as shown in FIG. 7.
    [0004] The air enters the internal compartment 12 defined by the volutes 10, 11 through the opening 13 arranged in the upper volute 11. The air sucked by the impeller 4, during its rotations, is expelled from the compartment 12 internal by an outlet conduit 14 for conveying the air which is then sent to the patient, via a flexible conduit or the like. As can be seen in FIGS. 3, 4 and 7, the lower face 4b of the impeller 4 is spaced apart and substantially parallel to the upper surface 5a of the disk-shaped front flange 5, whereas the upper face 4a of the wheel 4 carries the fins 4c. In general, the wheel 4 is made of lightweight material, typically of polymer. Usually, the motor shaft 3 is held and / or guided, during its rotations, by rolling bearings 8 lubricated with oil-type lubricants or the like. Preferably, bearing devices 8 are arranged on either side of the motor 9, around the axis 3, as can be seen in FIGS. 7 and 8. The problem that arises is that there is always a set 20, that is to say a spacing, between the axis 3 and the inner wall 15 of the orifice 16 passing through the upper face of the motor body 2, through which the shaft 3 leaves the motor body 2 to allow a rotation of the axis 3 in the orifice 16. This clearance 20, although low, is sufficient for the occurrence of inadvertent passages of pressurized gas from the compartment 12 towards the interior of the engine body 2 .
    [0005] However, as already explained, these pressurized air inlets cause premature wear of the bearings 8 of the engine 9 because the gaseous pressure expels the (or) lubricant which is supposed to limit the wear of the bearings 8 and the oxygen. which is present there, in particular when it is air enriched with oxygen (> 22% vol 02), deteriorates said lubricant by oxidizing it.
    [0006] To overcome this problem, in accordance with the present invention and as illustrated in FIGS. 4-6, a complete or almost complete gaseous seal is achieved at the level of the motor shaft 3 by means of the arrangement around said shaft 3, at the upper end of the motor body 2, a sealing member 6, which may be for example a rotary joint. This sealing member 6 is traversed by the motor shaft 3 and is retained or fixed to the motor body 2 by a holding device 7 adapted, for example a flange. It is formed of a deformable material, for example a polymer, typically a polymer of PE or PTFE type. Advantageously, the sealing member 6 is arranged in a housing 21 provided in the upper wall 5 of the motor body 2, the orifice 16 through which the shaft 3 opening into the bottom of said housing 21 is held there. by the flange or the like. The sealing part 6 therefore constitutes a gas-tight mechanical barrier which makes it possible to protect certain engine components contained in the engine body 2, in particular the bearings, by preventing: - on the one hand, the pressure differential existing between the interior of the motor body 2 and 20 inside the wheel compartment 4 lead to untimely entries of gas under pressure in the engine body 2 which would then operate a gaseous scan of the bearings and drive the lubricant that protects these bearings; and - secondly, oxygen can not enter the motor body 2 and comes to oxidize and thus damage the lubricant protecting the bearings.
    [0007] More specifically, this sealing piece 6 is attached upstream of the orifice 16 through which the axis 3 passes and thus ensures a maximum seal at the axis 3 and the upper surface of the motor body 2, therefore constitute a sealed mechanical barrier opposing the passage of gas in the clearance 20 existing between the inner wall 15 of said orifice 16 and the axis 3.
    [0008] Thus, the flow of gas that will sweep the bearings 8 will be zero or extremely reduced and the amount of oxygen capable of oxidizing the lubricant will also be very reduced or even zero. The life of the micro-blower will therefore be improved. In general, the apparatus of the invention equipped with the micro-blower described above can be used to treat respiratory pathologies of any type, in particular sleep apnea, chronic obstructive pulmonary disease (COPD). , disorders related to obesity ...
    权利要求:
    Claims (13)
    [0001]
    REVENDICATIONS1. A micro-blower (1) for a breathing apparatus comprising an electric motor (9) comprising a motor body (2) and an elongated rotary motor shaft (3), said motor shaft (3) being maintained or guided by at least one bearing device (8) arranged in said motor body (2), said motor shaft (3) passing through the upper wall (5) of the motor body (2) through an orifice (16) arranged in said upper wall (5) projecting outside said motor body (2), characterized in that a sealing piece (6) traversed by the motor shaft (3) is arranged at the level of the orifice (16).
    [0002]
    2. Micro-blower according to the preceding claim, characterized in that the sealing member (6) is held in position by a holding device (7).
    [0003]
    3. Micro-blower according to one of the preceding claims, characterized in that the holding device (7) is a flange.
    [0004]
    4. Micro-blower according to one of the preceding claims, characterized in that the sealing member (6) is positioned in contact with the upper wall (5) of the motor body (2).
    [0005]
    5. Micro-blower according to one of the preceding claims, characterized in that the sealing member (6) is formed of a deformable material capable of providing a fluid tightness selected from polytetrafluoroethylene (PTFE) and polyethylene (PE ).
    [0006]
    6. Micro-blower according to one of the preceding claims, characterized in that the sealing member (6) is a part of revolution.
    [0007]
    7. Micro-blower according to one of the preceding claims, characterized in that the sealing member (6) is held in a fixed position relative to the motor shaft (3).
    [0008]
    8. Micro-blower according to one of the preceding claims, characterized in that the sealing member (6) is traversed by an internal passage having an inner diameter substantially equal to the outer diameter of the motor shaft (3). 3036143 10
    [0009]
    9. Micro-blower according to one of the preceding claims, characterized in that the rotary motor shaft (3) has an elongate tubular shape.
    [0010]
    Micro-blower according to one of the preceding claims, characterized in that the motor shaft (3) carries a finned wheel (4), the sealing part (6) being arranged between the upper surface ( 5) of the motor body (2) and the lower face (4b) of the impeller (4).
    [0011]
    Micro-blower according to one of the preceding claims, characterized in that the sealing part (6) is arranged in a recess (21) arranged in the upper wall (5) of the motor body (2). orifice (16) opening into the bottom of said housing (21).
    [0012]
    12. Micro-blower according to one of the preceding claims, characterized in that the sealing member (6) is a rotary joint.
    [0013]
    13. Respiratory assistance device equipped with a micro-blower (1) according to one of the preceding claims. 15
    类似技术:
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    EP3482788B1|2021-02-17|Breathing assistance apparatus with motorised micro-fan
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    EP3482789B1|2020-04-29|Breathing apparatus with improved gas circuit
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    BE1000978A5|1989-05-30|Integrated electric motor and pump unit - uses lateral inlet and outlet pipes and has motor unit formed around rotating sleeve which has internal pumping elements
    FR3082894A1|2019-12-27|WHEEL-WHEEL MICRO-BLOWER FOR BREATHING ASSISTANCE APPARATUS
    FR3110438A1|2021-11-26|Air / oxygen mixer for an artificial respirator
    FR3035686A1|2016-11-04|ELECTRICAL COMPRESSOR WITH IMPROVED DYNAMIC SYSTEM OF SEALING
    同族专利:
    公开号 | 公开日
    CA2928215A1|2016-11-12|
    EP3093498A1|2016-11-16|
    FR3036143B1|2019-07-05|
    CN106151097A|2016-11-23|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP2000675A2|2007-06-05|2008-12-10|ResMed Limited|Blower With Bearing Tube|
    EP2031253A1|2007-08-28|2009-03-04|ebm-papst Mulfingen GmbH & Co.KG|Seal for circumferential gap sealing|
    CN203867931U|2014-04-30|2014-10-08|浙江海洋学院|Computer graphic card fan|
    FR2807117B1|2000-03-30|2002-12-13|Technofan|CENTRIFUGAL FAN AND BREATHING ASSISTANCE DEVICE COMPRISING SAME|
    CN101296722B|2005-10-28|2013-03-27|雷斯梅德有限公司|Single or multiple stage blower and nested volute and/or impeller therefor|
    FR2908482B1|2006-11-13|2010-04-02|Airfan|REGULATED DELIVERY APPARATUS FOR A GAS, PARTICULARLY RESPIRATORY ASSISTANCE APPARATUS|
    US20100189554A1|2007-06-25|2010-07-29|Airfan|Apparatus for regulated delivery of a gas, in particular breathing apparatus|
    EP3747489A1|2011-02-25|2020-12-09|ResMed Motor Technologies Inc|Blower and pap system|
    FR2973846B1|2011-04-11|2013-05-24|Airfan|APPARATUS FOR REGULATED DELIVERY OF GAS, ESPECIALLY RESPIRATORY ASSISTANCE APPARATUS|WO2018148789A1|2017-02-14|2018-08-23|Resmed Limited|An impeller for a respiratory device|
    FR3082897A1|2018-06-20|2019-12-27|Air Liquide Medical Systems|MICRO-BLOWER WITH IMPELLERED FLAP WHEELS FOR BREATHING ASSISTANCE APPARATUS|
    FR3087127A1|2018-10-15|2020-04-17|Air Liquide Medical Systems|MONITORING OR VENTILATION APPARATUS FOR CARDIOPULMONARY RESUSCITATION WITH DETERMINATION OF AN AIRWAY OPENING INDEX|
    法律状态:
    2016-05-20| PLFP| Fee payment|Year of fee payment: 2 |
    2016-11-18| PLSC| Search report ready|Effective date: 20161118 |
    2017-05-23| PLFP| Fee payment|Year of fee payment: 3 |
    2018-05-22| PLFP| Fee payment|Year of fee payment: 4 |
    2019-05-22| PLFP| Fee payment|Year of fee payment: 5 |
    2021-02-12| ST| Notification of lapse|Effective date: 20210105 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1554212|2015-05-12|
    FR1554212A|FR3036143B1|2015-05-12|2015-05-12|IMPROVED MOTOR-MOTOR SEALANT MICRO-BLOWER FOR RESPIRATORY ASSISTANCE APPARATUS|FR1554212A| FR3036143B1|2015-05-12|2015-05-12|IMPROVED MOTOR-MOTOR SEALANT MICRO-BLOWER FOR RESPIRATORY ASSISTANCE APPARATUS|
    EP16305480.2A| EP3093498A1|2015-05-12|2016-04-25|Micro-fan with improved motor-shaft sealing for assisted-breathing apparatus|
    CA2928215A| CA2928215A1|2015-05-12|2016-04-26|Micro-fan with improved axis-motor seal for respiratory assistance device|
    CN201610308085.9A| CN106151097A|2015-05-12|2016-05-11|The mini fan sealed for the drive shaft with improvement of respiratory assistance apparatus|
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