• 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) comprising an electric motor (2) with a rotary shaft (3) carrying a finned wheel (4), said electric motor (2) being included in a peripheral shroud (5), said fin wheel (4) being arranged between a lower volute (6) and an upper volute (7), the lower volute (6) comprising a central passage (8) encircling the peripheral surface (9) of the cowling (5) . The cowling (5) of the engine comprises an upper peripheral rim (10) projecting radially away from the outer peripheral surface (9) of the cowling (5). The central passage (8) of the lower volute (6) is lined internally by an annular shoulder (11), an annular seal (14) being arranged on said annular shoulder (11). The lower volute (6) further comprises a plurality of internal stops (12) carried by the inner surface (13) of the lower volute (6). The upper peripheral rim (10) of the cowling (5) of the motor being positioned between the annular seal (14) and the internal stops (12) of the lower volute (6), said internal stops (12) pressing against said upper peripheral flange (10) of the motor casing (5) so as to compress the annular seal (14) between said upper peripheral flange (10) of the casing (5) and the annular shoulder (11) of the lower volute (6).
    公开号:FR3021371A1
    申请号:FR1454585
    申请日:2014-05-21
    公开日:2015-11-27
    发明作者:Pierre-Emmanuel Dubois；Clara Fishman；Sebastien Gadrey；Hadrien Guiducci；Benjamin Dutheil
    申请人:Air Liquide Medical Systems SA；
    IPC主号:
    专利说明:

    [0001] The invention relates to a micro-blower for use in a medical respiratory assistance device, the fluidic sealing of which has been improved, as well as to its assembly method and to a medical respiratory assistance device incorporating a such micro-blower. In a medical breathing apparatus, also called medical ventilator, it is usual to use a micro-compressor, also called "micro-blower", or "compressor" or "turbine" by abuse of language, which allows aspirate air and then distribute it to the patient to whom the ventilator is connected. This is done via a suitable connector system conventionally comprising one or more flexible hoses and a patient interface, such as a breathing mask or the like. A micro-blower or compressor actually makes it possible to generate an air flow, that is to say a flow of air, possibly enriched with oxygen, at an adequate pressure which are necessary for good ventilation of a patient. given. Usually, a micro-blower comprises an electric motor with a rotary shaft carrying a finned wheel. The motor is protected externally by a cowling or outer casing. The impeller is sandwiched between two half-shells, called lower and upper scrolls, which form between them a compartment enclosing the impeller. The upper volute is usually surmounted by an acoustic core and a pavilion, or can incorporate these elements. The lower volute may, in some embodiments, come surround the cowling or motor housing. Examples of micro-blowers are described, for example, in EP-A-2102504, EP-A-2165078, EP-A-2506907 and EP-A-2122180.
    [0002] Usually, the assembly of a micro-blower takes a lot of time and is tedious because many manual operations are necessary and some are very long, even delicate. More specifically, the assembly of a micro-blower generally starts with a mounting of the impeller on the motor shaft using a specific machine, this pose being done with a certain height clearance between wheel and engine casing. Then, the upper and lower scrolls are arranged around the finned wheel by positioning very precisely the upper volute relative to the wheel. Indeed, precise positioning is essential because it is directly related to the good performance of the micro-blower. This problem is even more noticeable when using a non-flanged wheel to gain inertia and lightness. The volutes thus take the wing wheel "sandwich", such as two half-shells. Then, in order to obtain a fluidic seal of the assembly, it is essential to fill not only the space between the edges of the two volutes but also that between the lower volute and the outer cowling or casing of the engine. To do this, the space between the two volutes is usually filled by gluing, while that between the lower volute and the engine by affixing a seal between these elements. This fluidic sealing step is rather long and tedious, and must be operated meticulously because any filling fault leads to a leakage. Thus, in practice, it has been found that, in certain micro-blowers, sealing defects between the edges of the volutes often resulted from misalignment between them, or between the lower volute and the outer cowling of the engine due to insufficient or imperfect compression of the seal resulting in particular from the current architecture of these parts in existing micro-blowers. The problem that arises is to propose an improved micro-blower structure which makes it possible to improve the fluidic sealing between the lower volute and the outer cowling of the engine and preferably also between the two volutes, but without complicating the overall assembly of the micro-blower, or even by simplifying it, as well as a method of assembling such a micro-blower, and a respiratory assistance apparatus comprising such a micro-blower. The solution of the present invention is then a micro-blower, that is to say an air compressor, for a medical device for assisted ventilation, comprising a rotary shaft electric motor carrying a finned wheel, said electric motor being included in a peripheral cowling, said finned wheel being arranged between a lower volute and an upper volute, the lower volute comprising a central passage which encircle the peripheral surface of the cowling, characterized in that: - the engine cowling comprises a peripheral rim upper projecting radially away from the outer peripheral surface of the cowling, - the central passage of the lower volute is lined internally by an annular shoulder, an annular seal being arranged on said annular shoulder, - the lower volute comprises in addition several internal stops carried by the internal surface of the lower volute, and - the upper peripheral rim of the engine cowling being positioned between the annular seal and the inner stops of the lower volute, said internal stops pressing against said upper peripheral rim of the engine cowling so as to obtain compressing the annular seal between said upper peripheral flange of the cowling and the annular shoulder of the lower volute. Depending on the case, the micro-blower of the invention may comprise one or more of the following technical characteristics: the upper peripheral rim of the engine cowling comprises a plurality of recesses dimensioned to allow the passage of the internal stops of the lower volute, preferably the number of recesses is greater than or equal to the number of stops. - The inner stops of the lower volute project radially away from the inner surface of the lower volute. - The lower volute has at least 3 internal stops. - The lower volute further comprises an upper peripheral edge comprising a plurality of housing, the lower peripheral edge of the upper volute comprising several pins, each pin coming to be housed in one of the housing when the upper and lower volutes are assembled one to the other. the upper peripheral edge of the lower volute comprising at least 3 housings and the lower peripheral edge of the upper volute comprising at least 3 pins, preferably the number of housings is equal to the number of pins. - The upper volute is surmounted by an acoustic core and / or a flag. The invention further relates to a respiratory assistance apparatus comprising a micro-blower according to the invention, as well as the use of such a respiratory assistance apparatus for administering a breathing gas, in particular air or air enriched with oxygen, to a patient suffering from a deficiency or a respiratory disorder. Furthermore, the invention also relates to a method for assembling a micro-blower according to the invention, characterized in that the following steps are carried out successively: a) the lower volute is provided with the gasket sealing around the engine cowling by inserting the engine cowling in the central passage of the lower volute, b) is positioned each stop carried by the lower volute vis-à-vis a corresponding recess carried by the upper peripheral edge c) there is a translation movement of the lower volute in the direction of the upper peripheral flange of the cowling for passing the stops through said corresponding recesses, and d) after in step c), the stops have completely traversed the recesses, there is a rotational movement of the lower volute relative to the engine cowling so as to angularly offset the stops relative to the recess and positioning each abutment opposite a portion of the upper peripheral rim of the cowling so that the upper peripheral rim of the cowling is sandwiched between said abutments and the seal carried by the annular shoulder of the cowling. lower volute, thus ensuring a solidarity and fluid tight hold of the engine cowling to the lower volute. Depending on the case, the method of the invention may comprise one or more of the following technical characteristics: prior to step a), the fin wheel is positioned on the rotary shaft of the engine. after step d), it comprises the step e) of assembling the lower and upper volutes, one to the other, by inserting the pins carried by the lower peripheral edge of the upper volute within the housings; corresponding to the upper peripheral edge of the lower volute. After step e), it comprises the step f) of fixing an acoustic core and / or a flag to the upper volute. - After positioning the impeller on the rotary shaft of the motor, it balances said impeller on said rotary shaft. The invention will now be better understood by means of the following detailed description, given by way of illustration but without limitation, with reference to the appended figures in which: FIG. 1 represents a schematic view of a micro-blower for a medical ventilator according to 2a and 2b are side views of the micro-blower of Figure 1 cleared of the acoustic core and horn, showing the upper volute secured (Fig. 2a) or disengaged (Fig. 2b). 3 is an elevational view of the micro-blower of FIG. 2a, with a finned wheel visible by transparency, FIG. 4 schematizes the lower volute and the motor of the micro-blower of FIG. 3, before their joining, - Figures 5 and 6 are detailed views of the lower volute of the micro-fan of Figure 4, - Figures 7a and 7b are top views of the micro-blower 3 and 4, without the impeller, detailing the coupling of the lower volute to the shroud, FIG. 8 is a sectional side view of the micro-blower of FIGS. 3 and 4, FIG. enlarged from the inside of the finned wheel compartment, after assembly of the volutes, - Figure 10 illustrates the implementation of the flag on the acoustic core fitted to the micro-fan of Figure 1, - Figure 11 is a view FIG. 12 is a side view of an embodiment of the acoustic core of FIG. 10. The attached figures show an embodiment of the embodiment of the acoustic core of FIG. a micro-blower 1, also called compressor, for medical fan according to the present invention. As illustrated in FIG. 1, the micro-blower 1 comprises an electric motor 2 with a rotating shaft 3 carrying a finned wheel 4 (see FIGS. 2a, 2b and 3) which makes it possible to suck in air and generate a flow rate of air and a given air pressure when it is rotated by the electric motor 2, via the rotary shaft 3. The air sucked by the impeller is then expelled by an air outlet duct 23 which makes it possible to convey the air delivered by the micro-blower to the patient, via one or more gas conduits opening at a patient interface, such as a respiratory mask or the like. The electric motor 2 is in fact included in a cowling 5 or outer peripheral casing which is here cylindrical. It is supplied with electric current by a bundle of electric wires 22.
    [0003] The micro-blower 1 further comprises an acoustic core 20 for attenuating the noise emissions generated in particular by the rotations of the impeller 4 and the engine 2, and a horn 21 comprising a central opening 25 through which the air can penetrate in the micro-blower 1 when it is sucked by the impeller 4.
    [0004] As illustrated in FIGS. 2a, 2b and 3, the impeller 4 is arranged between a lower volute 6 and an upper volute 7 which form one and the other of the half-shells "sandwiching" the impeller. 4. In other words, the lower and upper volutes 6, when they are joined to one another, define between them an internal compartment or hollow space within which is arranged the impeller 4. lower volute 6 and the upper volute 7 are preferably made of plastic but may also be made of other materials, such as aluminum or aluminum alloy.
    [0005] As can be seen in FIGS. 2a / 2b and 7a / 7b and a first part 6a of the wall of the lower volute 6 and a second part 7a of the wall of the upper volute 7 are shaped so as to form a part , especially the inlet, the air outlet duct 23, when the volutes 6, 7 are assembled to one another and said first and second wall portions 6a, 7a of the volutes 6, 7 are set look at each other. In fact, said first and second wall portions 6a, 7a of the volutes 6, 7 each form complementary tube portions, namely half-tubes, which when joined constitute at least the inlet of the duct 23. length of these complementary tube portions forming the first and second parts 6a, 7a is typically between 0.5 cm and 7 cm, preferably less than 4 cm, typically between 1 and 2.5 cm, for example of the order 1.5 cm. As seen in Figures 10 and 11, the tubular portion 28 of the horn 21 is positioned around the first and second wall portions 6a, 7a of the scrolls 6, 7, that is to say form a sleeve around said first and second parts 6a, 7a when they are joined to each other.
    [0006] Furthermore, the lower volute 6 comprises a central passage 8 which is positioned around, that is to say, surround the peripheral surface 9 of the cowling 5 of the engine 2. The internal diameter of said central passage 8 is therefore greater than or equal to outer diameter of the cowling 5, preferably they are approximately equal so that the contour of the central passage 8 comes to marry the outer contour of the cowling 5 of the engine 2. Similarly, the upper volute 7 also comprises a central passage 24 opposite which is positioned the central opening 25 of the roof 21 so as to allow the air sucked by the impeller 4 to enter the compartment defined by the lower volutes 6 and upper 7 and which encloses the impeller 4.
    [0007] The upper and lower volutes 6 and 7 therefore preferably each have a general shape of a cup and each comprise a passage in their center. However, according to another possible embodiment, the air inlet in the upper volute 7 could also be laterally and in this case, said upper volute 7 could comprise an air passage arranged laterally rather than its center. Similarly, they could also have a "snail" shape (i.e. snail) rather than cup. According to the present invention, in order to improve the fluidic seal between the lower volute 6 and the outer cowling or casing 5 of the motor 2 of the micro-blower 1, the cowling 5 of the engine and the lower volute 6 have been shaped so particular, as explained below, so as to cooperate effectively with each other. More specifically, the engine cowling 5 is provided with an upper peripheral rim 10 forming a ring around the outer periphery at the top of the cowling 5 of the engine 2. This crown-shaped upper peripheral edge 10 projects radially. away from the outer peripheral surface 9 of the cowling 5, as shown in Figure 4. According to the embodiment shown in Figures 4 and 7a / 7b, the flange 10 is carried by or is part of a plate 28 disc-shaped to cap the upper end 5a of the cowling 5, said plate 28 having a diameter greater than that of the cowling 5 so as to constitute said upper peripheral flange 10. The plate 28 is pierced at its center so as to form a axial passage 29 for the shaft 3 of the motor. The flange 10 thus consists of a portion (ie annular band) of the peripheral region of the disk constituting the plate 28. The plate 28 may be formed in one piece, by machining and may be integrally integrated with the components of the engine for example, with the peripheral wall 9 of the cowling 5 or attached thereto by gluing, screwing, welding or any other means. Of course, according to other embodiments are possible. Thus, the flange 10 may also be formed in one piece, for example by machining with the peripheral wall 9 of the cowling 5, or may consist of an independent annular piece which has been secured to the peripheral wall 9 of the cowling 5. for example by gluing, screwing, welding or any other means. Furthermore, as illustrated in FIG. 5, the central passage 8 of the lower volute 6 comprises an annular shoulder 11 coming from the inside, that is to say the side of the lower volute 6 situated opposite the wheel. fins 4. An annular seal 14 is arranged on said annular shoulder 11 so as to extend around the entire periphery of said shoulder 11. The shoulder 11 and the seal 14 here have a circular crown shape, it is ie a form of revolution The seal 14 is made of flexible material, preferably elastomer, for example rubber. In addition, as shown in FIG. 6, the lower volute 6 carries several internal stops 12, namely here three internal stops 12, which are arranged on the internal surface 13 of the lower volute 6. The internal stops 12 project radially away from each other. relative to the inner surface 13 of the lower volute 6.
    [0008] Thanks to such arrangements, it is possible to considerably improve the seal between the lower volute 6 and the cowling 5 of the engine 2 but also simplify the assembly of these elements with each other. Indeed, to do this, during assembly, it comes to position the upper peripheral rim 10 of the cowling 5 of the motor between the annular seal 14 and the internal stops 12 of the lower volute 6. The said internal stops 12 then support on the upper peripheral rim 10 of the engine cowling 5 by pushing it towards the annular shoulder 11 of the lower volute 6, which then causes compression by crushing and deformation of the annular seal 14 between said upper peripheral flange 10 of the cowling 5 and the annular shoulder 11 of the lower volute 6. In fact, to allow this insertion of the upper peripheral edge 10 of the cowling 5 between abutments 12 and seal 14, it is arranged on the upper peripheral edge 10 of the cowling 5 several recesses 15, as shown in Figures 7a and 7b in particular, which recesses 15 are dimensioned to allow the passage of The internal stops 12 of the lower volute 6. Preferably, the number of recesses 15 is equal to the number of stops 12. Advantageously, at least 3 recesses 15 and at least 3 corresponding abutments 12 are provided. Thus, in the embodiment shown in the figures, 4 stops 12 and 4 recesses 15 have been implemented, as can be seen in FIGS. 7a and 7b. Once the stops 12 are completely brought into contact with the recesses 15, then passed through said recesses 15, by translational movement of the lower volute 6 with respect to the upper peripheral rim 10 of the cowling 5 (illustrated in Fig. 7a) it is sufficient to make a rotational movement of the lower volute 6 relative to the cowling 5 to position the stops 12 in contact with the wall or annular ring constituting the upper peripheral edge 10 of the cowling 5, which then allows the internal stops 12 to ensure a fixed support of the assembly in this position and a tight compression of the seal 14 (shown in Fig. 7b). In order to allow such an assembly, it is essential that a minimum distance D be provided between the plane comprising the lower surface of the abutments 12 and the plane including the upper surface of the shoulder 11, namely a distance d slightly greater than the thickness e of the flange 10, for example greater than a few millimeters to take into account the extra thickness of the seal 14 coming to be positioned on the shoulder 11, which is compressed during the insertion of the flange 10 between the shoulder 11 and the stops 12.
    [0009] In addition, in order to facilitate the joining of the upper volute 7 to the lower volute 6, and their good alignment with respect to each other, so as to ensure a good fluidic seal between them, that is to say say at their junction, there is provided a positioning system of said volutes 6, 7, relative to each other. More precisely, as can be seen in FIGS. 2b, 3, 7a, 7b and 8, this system for positioning said volutes 6, 7 comprises pins 19 cooperating with corresponding housings 16, into which they are inserted when the volutes 6 , 7 are assembled together. For this purpose, several housings 16, for example three housings 16, are arranged on the upper peripheral edge 17 of the lower volute 6 and, moreover, several pins 19, for example three pins 19, on the lower peripheral edge 18 of the upper volute 7. Each pin 19 is housed in one of the housings 16 when the lower volutes 6 and upper 7 are brought into contact with each other, that is to say, assembled one to the other. 'other. The housings 16 may, as here, be arranged in small protuberances 30 of the upper peripheral edge 17 of the lower volute 6, which protrude outwardly of the volute 6. However, according to other embodiments, they can also be arranged directly in the edge of said upper peripheral edge 17 or the inner side of the volute 6. Similarly, the pins 19 carried by the lower peripheral edge 18 of the upper volute 7 can be, as here, slightly offset externally.
    [0010] However, according to other embodiments, they may also be carried by the edge of said lower peripheral edge 18 or slightly offset internally. The pins 19 are preferably formed in one piece with the lower peripheral edge 18 of the upper volute 7, for example by molding.
    [0011] The pins 19 are preferably formed in one piece with the lower peripheral edge 18 of the upper volute 7, for example by molding. Similarly, the small protuberances 30 of the upper peripheral edge 17 of the lower volute 6 are preferably formed in one piece with said upper peripheral edge 17. Whatever the embodiment chosen, the housings 16 and the pins 19 must be arranged so as to face each other and to cooperate together so that the pins 19 are easily inserted into the housings 16 during the assembly of the volutes 6, 7.
    [0012] In all cases, these pin pairs 19 / housing 16 thus form stowage points that allow time savings during assembly and repeatability during assembly. In other words, this not only makes it easier to mount the upper volute 7 on the lower volute 6, but also to guarantee a good positioning of the one with respect to the other, without risk of misalignment, therefore of ensure a good fluidic seal between the scrolls 6, 7. These can be optionally glued to each other. The mounting of the micro-blower 1 is thus accelerated and the fluidic sealing simplified and improved. Note that a reverse embodiment is also conceivable, that is to say with the housings 16 arranged on the lower peripheral edge 18 of the upper volute 7 and the pins 19 arranged on the upper peripheral edge 17 of the volute 6. Figures 10 to 12 schematically illustrate possible embodiments of the horn 21 and the acoustic core 20 of a micro-fan 1 according to the present invention. In all cases, the roof 21 overcomes the acoustic core 20, and this assembly overcomes the upper volute 7. It can be seen that the roof 21 here has the general shape of a cup 29 traversed at its center by the central opening 25 and bearing laterally a tubular portion 28 in fluid communication with the interior of the pavilion 21. Furthermore, the acoustic core 20 here has a generally annular shape 30 slightly convex to fit the outer profile of the upper volute 7, and has in its center a central recess 31 being positioned facing the central opening 25 of the roof 21 and the central passage 24 of the upper volute 7 so as to ensure fluid continuity between them.
    [0013] When the acoustic core 20 is positioned on the upper volute 7, it comes to match its contour and in the same way, when the flag 21 is arranged on the acoustic core 20, it also marries the contours so as to ensure good solidarity of the whole.
    [0014] Pavilion 21 is preferably made of a flexible material, for example made of silicone, so that it can be threaded and positioned easily on the acoustic core 20 and the upper volute 7. In order to facilitate the correct coupling / alignment of the horn 21 on the core 20, there is provided a coding system 26, 27, illustrated in Figure 10, comprising one (or more) projecting element 27, here carried by the flag 21, being housed in one (or more) associated housing 26 having a preferentially complementary shape, which is carried here by the acoustic core 20, so as to ensure between them a male / female type coupling. Of course, alternatively, the projecting element 27 could be carried by the acoustic core 20 and the associated housing 26 by the roof 21, or several projecting elements 27 and several associated housing 26 could also be arranged at a time on the roof 21 and on the acoustic core 20 so as to constitute several points / zones of coupling / foolproofing. More generally, the roof 21 is preferably made of flexible material, for example silicone. Furthermore, the acoustic core 20 is preferably made of elastomeric material having good vibration damping properties. Advantageously, the assembly of the micro-blower 1 of the invention is carried out according to an assembly method comprising the following successive steps: a) after having positioned the fin wheel 4 on the rotary shaft 3 of the engine 2, it is arranged the lower volute 6 provided with the seal 14 around the cowling 5 of the engine 2 by inserting the cowling 5 of the engine 2 in the central passage 8 of the lower volute 6, as shown schematically in Figure 4. The correct positioning of the finned wheel 4 on the shaft or axis 3, can be done by means of a suitable tool that accurately measures the position of the wheel 4 in height relative to the upper part of the surface 28, when it fits onto the shaft 3 for example a position sensor or a contactless detector. b) the lower volute 6 is then approached from the upper peripheral rim 10 of the cowling 5 by sliding the cowling 5 of the engine 2 into the central passage 8 of the lower volute 6 and care is taken to position correctly, that is to say ie to align, the stops 12 carried by the lower volute 6 vis-à-vis the recesses 15 carried by the upper peripheral edge 10 of the cowling 5. This step b) is illustrated in Figure 7a which shows the stops 12 and the recesses 15 positioned face to face, that is to say before the translational movement of step c). c) then, there is a translational movement of the lower volute 6 in the direction of the upper peripheral rim 10 of the cowling 5 to pass the stops 12 through said recesses 15 corresponding. d) once the stops 12 have completely passed through the recesses 15, there is a rotational movement of the lower volute 6 relative to the cowling 5 of the motor 2 so as to angularly offset the stops 12 relative to the recesses 15 and to position each stop 12 facing a portion of the upper peripheral rim 10 of the cowling 5 so that the upper peripheral edge 10 is sandwiched between said stops 12 and the seal 14 carried by the annular shoulder 11 of the lower volute 6. This step c) is illustrated in Figure 7b which shows the stops 12 and the recesses 15 in angularly offset position, that is to say in a blocking position integral with the lower volute 6 and the cowling 5 This ensures a secure and fluidly sealed support of the cowling 5 of the engine 2 to the lower volute 6 by crushing the seal 14, as shown in Figure 8. It is pro in fact does a kind of clipping by rotation to maintain the lower volute 6 on the cowling 5 of the engine 2 integrally and tightly due to the collapse of the seal 14. In general, as shown schematically in Figure 4 , it is ensured that the lower surface of the wheel 4 is slightly spaced axially from the upper surface of the cowling 5 of the engine, for example there is a minimum spacing E between them of the order of one to a few millimeters. Advantageously, after correct positioning of the fin wheel 4 on the rotary shaft 3 in step a), it is balanced to avoid vibrations, the noise generated by them but also increase its life . This can be done on a balancer by removing material so as to reduce or eliminate the unbalance of the rotating part with a milling cutter and a system measuring the angular position and the weight of the unbalance. In fact, the seal 14 which is of elastic material will, when compressed, go flat, thanks to a return force directed along the axis of the motor, the support zone 12 of the lower volute 6 against the upper portion of the motor 2 on the upper peripheral flange 10. On the underside of the disc 10 at the surface 28 and at the shoulder 11, the seal 14a a shape to ensure a fluidic seal. The seal 14 thus provides a triple action: sealing, plating and holding in position. Once these elements have been put in place, the assembly of the micro-blower 1 of the invention can be continued according to the following steps: e) the lower and upper scrolls 7 are assembled, one to the other, by inserting the pins 19 carried by the lower peripheral edge 18 within corresponding housings 16 carried by the lower volute 6. Such a design with at least 3 support points located very precisely relative to the upper plane of the engine is advantageous because it allows to avoid any problem of misalignment of the scrolls and the wheel 4 is also positioned very precisely with respect to the bearing surface thus ensuring a minimum height H less than 1 mm, typically of the order of 0.1 to 0.4 mm between the upper surface of the wheel 4 and a surface having a shape complementary to that of the top of the blades, as illustrated in FIG. 9. f) and finally, the acoustic core 20 and the roof 21 are fixed to the upper volute 7. The acoustic core 20 serves to attenuate the vibrations and the noise generated by the micro-blower 1. The horn 20 serves to maintain the acoustic core 20 on the upper volute 7, to keep the two scrolls assembled together if they are not glued, to guide the air sucked by the impeller 4 and further improve the sealing of the assembly.
    [0015] The micro-blower 1 is then fully assembled and ready for use, and can therefore be incorporated into a medical device for assisted ventilation, for example in a MONNAL type fan marketed by the Applicant. In general, a micro-blower 1 according to the invention advantageously has a weight of less than 500 g and a limited space requirement, namely a height between the bottom of the cowling 5 of the engine 2 and the top of the flag 21, typically less than 15. cm, or even less than 10 cm.
    权利要求:
    Claims (13)
    [0001]
    REVENDICATIONS1. Micro-blower (1) comprising an electric motor (2) with a rotary shaft (3) carrying a finned wheel (4), said electric motor (2) being included in a circumferential cover (5), said impeller (4 ) being arranged between a lower volute (6) and an upper volute (7), the lower volute (6) comprising a central passage (8) encircling the peripheral surface (9) of the cowling (5), characterized in that: - The cowling (5) of the engine comprises an upper peripheral flange (10) projecting radially away from the outer peripheral surface (9) of the cowling (5), - the central passage (8) of the lower volute (6). ) is internally bordered by an annular shoulder (11), an annular seal (14) being arranged on said annular shoulder (11), - the lower volute (6) further comprises a plurality of internal stops (12) carried by the inner surface (13) of the lower volute (6), and - the upper peripheral rim (10) of the engine cowling (5) being positioned between the annular seal (14) and the internal stops (12) of the lower volute (6), said internal stops (12) pressing against said upper peripheral flange (10) of the motor casing (5) so as to compress the annular seal (14) between said upper peripheral flange (10) of the casing (5) and the annular shoulder (11) of the lower volute (6).
    [0002]
    2. Micro-blower according to the preceding claim, characterized in that the upper peripheral flange (10) of the cowling (5) of the motor (2) comprises a plurality of recesses (15) sized to allow the passage of the internal stops (12) of the lower volute (6).
    [0003]
    3. Micro-blower according to one of the preceding claims, characterized in that the internal stops (12) of the lower volute (6) projects radially away from the inner surface (13) of the lower volute (6). ).
    [0004]
    4. Micro-blower according to one of the preceding claims, characterized in that the lower volute (6) comprises at least 3 internal stops (12).
    [0005]
    5. Micro-blower according to one of the preceding claims, characterized in that the lower volute (6) further comprises an upper peripheral edge (17) comprising a plurality of housings (16), the lower peripheral edge (18) of the volute upper (7) comprising a plurality of pins (19), each pin (19) being housed in one of the housings (16) when the lower scrolls (6) and upper (7) are assembled to one another.
    [0006]
    6. Micro-blower according to one of the preceding claims, characterized in that the upper peripheral edge (17) of the lower volute (6) comprising at least 3 housings (16) and the lower peripheral edge (18) of the volute upper (7) comprising at least 3 pins (19), preferably the number of housings (16) is equal to the number of pins (19).
    [0007]
    7. Micro-blower according to one of the preceding claims, characterized in that the upper volute (7) is surmounted by an acoustic core (20) and / or a flag (21).
    [0008]
    8. Respiratory assistance apparatus comprising a micro-blower according to one of the preceding claims.
    [0009]
    9. A method of assembling a micro-blower (1) according to one of claims 1 to 7, characterized in that one proceeds in the following successive steps: a) the lower volute is arranged (6) provided of the seal (14) around the cowling (5) of the engine (2) by inserting the cowling (5) of the engine (2) in the central passage (8) of the lower volute (6), b) positioning each abutment (12) carried by the lower volute (6) opposite a recess (15) corresponding carried by the upper peripheral flange (10) of the cowling (5), c) there is a translational movement the lower volute (6) towards the upper peripheral edge (10) of the cowling (5) to pass the stops (12) through said recesses (15), and d) after step c) , the stops have completely passed through the recesses (15), there is a rotational movement of the lower volute (6) relative to the cowling (5) of the engine (2) to angularly offset the stops (12) relative to the recesses (15) and to position each stop (12) facing a portion of the upper peripheral rim (10) of the cowling (5) so that that the upper peripheral rim (10) of the cowling (5) is sandwiched between said stops (12) and the seal (14) carried by the annular shoulder (11) of the lower volute (6), in thus ensuring a solidarity and fluid tight hold of the cowling (5) of the motor (2) to the lower volute (6).
    [0010]
    10. The method of claim 9, characterized in that, prior to step a), the finned wheel (4) is positioned on the rotary shaft (3) of the motor (2).
    [0011]
    11. Method according to one of claims 9 or 10, characterized in that after step d), it comprises the following step e) e) assembling the scrolls lower (6) and upper (7), to each other, by inserting the pins (19) carried by the lower peripheral edge (18) of the upper volute (7) into corresponding housings (16) carried by the upper peripheral edge (17) of the lower volute (6).
    [0012]
    12. Method according to one of claims 9 to 11, characterized in that after step e), it comprises the following step f): f) an acoustic core (20) and / or a horn ( 21) to the upper volute (7).
    [0013]
    13. Method according to one of claims 9 to 12, characterized in that after positioning the impeller (4) on the rotary shaft (3) of the motor (2), it balances said wheel to fins (4) on said rotary shaft (3).
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    同族专利:
    公开号 | 公开日
    CA2888380A1|2015-11-21|
    CN105090072B|2019-03-15|
    EP2947328A1|2015-11-25|
    EP2947328B1|2018-12-05|
    CN105090072A|2015-11-25|
    FR3021371B1|2019-06-21|
    ES2707502T3|2019-04-03|
    AU2015202627A1|2015-12-10|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR1399239A|1964-06-19|1965-05-14|Rotron Manufactureing Company|Fan|
    US5573383A|1994-03-16|1996-11-12|Nippondenso Co., Ltd.|Blower assembly including casing housing a fan and a motor|
    FR2908482A1|2006-11-13|2008-05-16|Airfan Soc Par Actions Simplif|Gas i.e. air, delivering apparatus i.e. breathing assistance apparatus, has case, motor and volute delimiting gas flow pipe that extends towards volute opening, where case interiorly forms plot that projects near wheel hub after assembling|
    EP2000675A2|2007-06-05|2008-12-10|ResMed Limited|Blower With Bearing Tube|
    WO2011017763A1|2009-08-11|2011-02-17|Resmed Motor Technologies Inc.|Single stage, axial symmetric blower and portable ventilator|FR3106065A1|2020-01-10|2021-07-16|Air Liquide Medical Systems|Radial Mount Micro Blower for Medical Ventilator|CN2255518Y|1996-04-01|1997-06-04|马建新|Dual-purpose fan|
    CN2423431Y|2000-04-21|2001-03-14|慕乃道|Pressure-regulatiing-type centrifugel blower|
    FR2910079B1|2006-12-18|2013-06-07|Airfan|APPARATUS FOR DELIVERING GAS, ESPECIALLY RESPIRATORY ASSISTANCE, TO OXYGEN LEAK INTERLEDGE COLLECTION CHAMBER.|
    US20100189554A1|2007-06-25|2010-07-29|Airfan|Apparatus for regulated delivery of a gas, in particular breathing apparatus|
    FR2953142B1|2009-12-02|2013-04-12|Airfan|APPARATUS FOR REGULATED DELIVERY OF GAS, ESPECIALLY RESPIRATORY ASSISTANCE APPARATUS|FR3002008B1|2013-02-11|2016-08-12|Air Liquide Medical Systems|TURBINE FOR RESPIRATORY ASSISTANCE APPARATUS WITH IMPROVED GAS SEALING|
    FR3070449B1|2017-08-31|2020-03-13|Valeo Systemes De Controle Moteur|ELECTRIC COMPRESSOR WITH TWO-PART VOLUTE|
    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|
    WO2020253983A1|2019-06-20|2020-12-24|Löwenstein Medical Technology S.A.|Fan unit for a ventilator|
    法律状态:
    2015-05-21| PLFP| Fee payment|Year of fee payment: 2 |
    2015-11-27| PLSC| Search report ready|Effective date: 20151127 |
    2016-05-20| PLFP| Fee payment|Year of fee payment: 3 |
    2017-05-23| PLFP| Fee payment|Year of fee payment: 4 |
    2018-05-22| PLFP| Fee payment|Year of fee payment: 5 |
    2019-05-22| PLFP| Fee payment|Year of fee payment: 6 |
    2021-02-12| ST| Notification of lapse|Effective date: 20210105 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1454585|2014-05-21|
    FR1454585A|FR3021371B1|2014-05-21|2014-05-21|IMPROVED SEALANT MICRO-BLOWER FOR MEDICAL FAN AND METHOD FOR ASSEMBLING THE SAME|FR1454585A| FR3021371B1|2014-05-21|2014-05-21|IMPROVED SEALANT MICRO-BLOWER FOR MEDICAL FAN AND METHOD FOR ASSEMBLING THE SAME|
    ES15305543T| ES2707502T3|2014-05-21|2015-04-13|Improved watertight micro-blower for medical ventilator and its assembly procedure|
    EP15305543.9A| EP2947328B1|2014-05-21|2015-04-13|Microfan with improved seal for medical ventilator and method for assembling the same|
    CA2888380A| CA2888380A1|2014-05-21|2015-04-17|Micro-fan with improved seal for medical ventilator and its assembly process|
    AU2015202627A| AU2015202627A1|2014-05-21|2015-05-15|Micro-blower having improved sealing for a medical ventilator, and method for the assembly thereof|
    CN201510252861.3A| CN105090072B|2014-05-21|2015-05-18|The micro-blower and its assemble method improved for the sealing of medical breathing machine|
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