EP1479335A2 - Elektrogebläse und damit ausgerüstetes Elektrogerät - Google Patents
Elektrogebläse und damit ausgerüstetes Elektrogerät Download PDFInfo
- Publication number
- EP1479335A2 EP1479335A2 EP04252453A EP04252453A EP1479335A2 EP 1479335 A2 EP1479335 A2 EP 1479335A2 EP 04252453 A EP04252453 A EP 04252453A EP 04252453 A EP04252453 A EP 04252453A EP 1479335 A2 EP1479335 A2 EP 1479335A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- motor
- case
- electric blower
- fan
- centrifugal fan
- 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.)
- Granted
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Classifications
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L5/00—Structural features of suction cleaners
- A47L5/12—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum
- A47L5/22—Structural features of suction cleaners with power-driven air-pumps or air-compressors, e.g. driven by motor vehicle engine vacuum with rotary fans
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
- A47L9/22—Mountings for motor fan assemblies
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/5813—Cooling the control unit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
- F04D29/5853—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps heat insulation or conduction
Definitions
- the present invention relates, in general, to an electric blower and an electric apparatus equipped with this electric blower, such as a vacuum cleaner.
- the invention relates to an electric blower which is equipped with a switching element for controlling the operation of the blower.
- Fig. 1 of the Japanese Patent Laid-Open No. Hei 6 (1994) 26494 shows an example in which a switching element is mounted in a close contact on the outer circumferential wall of a motor case facing a space formed by a step portion between the outer circumferential wall of the motor case and the outer circumferential wall of a fan case.
- Fig. 3 of the Japanese Patent Laid-Open No. Hei 6 (1994) 261847 shows an example in which a package including a control/drive integrated circuit board is fixed on a case in the area closer to the fan than the partition plate where air from a diffuser directly hits in a position.
- the package including a control/drive integrated circuit board is arranged in an air channel between the fan and the motor.
- the arrangement of the package located in the air channel increases pressure loss of the channel and, therefore lowers the efficiency of the electric blower.
- motors such as brushless motor equipped with a plurality of power devices that require cooling, the internal channel is more complex, causing even greater pressure loss of the channel.
- an object of the present invention is to enable power devices such as switching elements to be efficiently cooled without causing increase in pressure loss of the air channel.
- a case for housing the motor and a centrifugal fan fitted to a rotation shaft of the motor is provided, and a power device or devices provided in a drive circuit to drive the motor are arranged on an outer surface of a partition wall constituting an air channel between the exhaust port of the centrifugal fan and the motor.
- An electric blower 1 is basically comprised of a motor 2, a centrifugal fan 4 fitted to a rotor shaft 3 of this motor 2, and a case 5 for housing the motor 2 and centrifugal fan 4.
- the motor 2 in this embodiment is a motor with brush, housed in a cylindrical shaped motor case 6.
- the front end of this motor case 6 constitutes an opening 7, and a long planar bracket 8 bridges over this motor case 6 in the diametric direction of the motor case 6, fitted with screws 9 so as to cover part of the opening 7.
- the opening 7 not covered by the bracket 8 therefore forms an air flow opening 10.
- a bearing housing 13a is arranged to protrude forward (towards the centrifugal fan 4) in a substantially cylindrical shape.
- a bearing 11a is housed on the inner circumferential side of this bearing housing 13a.
- a through hole 12 for the rotor shaft 3 is formed at the center of the bearing housing 13a.
- the centrifugal fan 4 comprises a main disk plate 322, a side disk plate 323 and a plurality of vanes 324.
- Each vane 324 has a plurality of ear portions 325, which are respectively fit and fastened up in their corresponding holes 326 formed in the main disk plate 322 and the side disk plate 323.
- vanes 324 are respectively fixed in a sandwiched manner between the main disk plate 322 and the side disk plate 323.
- An inlet 17 is formed at a center of the side disk plate 323 and exhaust ports 22 communicating to the inlet 17 along vanes 324 respectively are formed between a circumferential edge of the main disk plate 322 and that of the side disk plate 323.
- a diffuser 14 is fixed to a forward side of the bracket 8. Farther ahead of this diffuser 4, the centrifugal fan 4 is arranged. Onto the outer circumferential portion of the motor case 6 is snapped (connected) a fan cover 15. This fan cover 15 covers the centrifugal fan 4 and the diffuser 14. This fan cover 15 has an intake opening 16, which is located opposite to the inlet 17 of the centrifugal fan 4, at the center of its front side and a rear opening (not shown) at the entire rear side. And the fan cover 15 is formed substantially as a cylindrical shape. These motor case 6 and fan cover 15 comprise the case 5. The fan cover 15 here is formed to have a larger outer circumferential wall than that of the motor case 6 in the centrifugal direction. The upper end of an outer circumferential wall of the motor case 6 (the upward direction being toward the fan cover 15 as viewed from the motor case 6) and the lower end of that of the fan cover 15 are connected through a linking portion 18.
- an air outlet (not shown) is opened, positioned in the radial direction.
- the rear side of the motor case 6 in the axial direction is sealed by a rear plate 21.
- the central part of this rear plate 21 protrudes backward in a substantially cylindrical shape to constitute a bearing housing 13b.
- a bearing 11b is housed in this bearing housing 13b.
- the motor 2 is configured of a stator 19 fixed to the motor case 6 and a rotor 20 arranged inside this stator 19. Both ends of the rotor shaft 3 at the center of the rotor 20 are rotatably supported by the bearings 11a and 11b.
- the diffuser 14 comprises: a substantially circular disk plate 81; a through hole 82, through which the rotor shaft 3 rotatably penetrates, formed substantially at the center of this disk plate 81 ; screw holes 83a and 83b for fixing the disk plate 81 to the bracket 8; a plurality of arcuate blades 84 erected on the circumferential area of the front surface of the disk plate 81 so as to be positioned outside of the circumferential edge of the centrifugal fan 4; and a plurality of arcuate blades 85 erected in a volute shape on the rear surface of the disk plate 81.
- the diffuser 14 having the above-described construction is located opposite to the linking portion 18 of the case 5, and secured to the bracket 8 with screws.
- the rotor shaft 3 penetrates the through hole 82 of the disk plate 81 and is supported by the bracket 8.
- the centrifugal fan 4 rotates integrally with that rotation.
- This rotation causes flow of air to pass the centrifugal fan 4 from the intake opening 16 opened at the front face of the fan cover 15 to exhaust port 22.
- Air from the exhaust port 22 flows between the arcuate blades 84 along the inner circumferential face of the fan cover 15 toward the rear side of the disk plate 81.
- the air further flows between the arcuate blades 85 in a volute manner along the rear surface of the disk plate 81 toward the center of the diffuser 14.
- the diffuser 14 in this way uniformly rectifies the air discharged from the exhaust port 22 of the centrifugal fan 4 and guides the air to the motor 2.
- the electric blower 1 is connected to a commercial A.C. power source via a switching element 23 for controlling electric power to the motor 2 as shown in Fig. 5.
- a control terminal of this switching element 23 is connected with an electric blower control unit 26 consisting of a microcomputer 25 and the like.
- the electric blower control unit 26 is mounted on a circuit board 27 and terminals of the switching element 23 are connected with wired patterns on it.
- This electric blower control unit 26 is further connected with an operating unit 28 for starting and stopping power, or selecting from a plurality of different electric powers (Strong, Regular and Weak) a desirable power supplied to the electric blower 1.
- the switching element 23 and the electric blower control unit 26 in this way constitute a drive circuit 27a.
- a body of the switching element 23 contained in the drive circuit 27a as a power device is arranged on the outside of a partition wall 29a forming an air channel 29 between the exhaust port 22 of the centrifugal fan 4 and the motor 2, and secured by a screw 30.
- the partition wall 29a is a wall forming the channel 19 between the exhaust port 22 of the centrifugal fan 4 and the upper end of the motor 2 in the electric blower 1 and separating air flowing through the air channel 29 from an outside air.
- this electric blower 1 part of an outer circumferential wall 15a of fan cover 15 and part of an outer circumferential wall 6a of motor case 6 constitute the partition wall 29a.
- the case 5 comprises the motor case 6 and the fan cover 15, and this fan cover 15 has an outer circumferential wall 15a greater in diameter than an outer circumferential wall 6a of the motor case 6.
- the partition wall 29a includes the linking portion 18 which is interposed between the outer circumferential wall 15a of the fan cover 15 and the outer circumferential wall 6a of the motor case 6.
- the switching element 23 is fixed on the outside surface of the linking portion 18.
- this type of linking portion 18 is a step portion created by the difference in outer circumferential size between the fan cover 15 and the motor case 6 in the centrifugal direction. It is therefore structurally easy to form the linking portion 18 as a planar portion. Since the switching element 23 can be mounted to this type of plane in this structure, there is greater degree of freedom in mounting of the switching element 23 compared with a case where the switching element is mounted on the outer circumferential surface of the motor case 6.
- this linking portion 18 also constitutes a region opposite the diffuser 14 for rectifying the channel flow of the air from the exhaust port 22 of the centrifugal fan 4 to the motor 2.
- Experimental findings by the present inventor have also confirmed the high cooling effect on the switching element 23 arranged in the region opposite the diffuser 14.
- the linking portion 18 in the case 5 is integrated with the motor case 6, and is configured of a flange 31 formed by bending the circumferential end portion'of this cylindrical shaped motor case 6 to protrude in the outer direction to have a substantially L-shaped section.
- the flange 31 can be easily shaped flatly in this configuration, the switching element 23 can be easily secured to the flange 31.
- the switching element 23 is arranged on the outer surface of the flange 31 formed by a step portion designed to make fixing easier and cooling more efficient.
- the switching element 23 can also be fixed on the outer surface of the electric blower 1 in a position closer to the intake opening 16 than the motor 2 and opposite the diffuser 14, for instance on the outer surface of the outer circumferential wall 15a of the fan cover 15 as shown in Fig. 6 and Fig. 7.
- this embodiment uses a motor case 32 in place of the motor case 6.
- the motor case 32 in this embodiment is a bottomed structure using a rear plate portion 33, whose fan cover 15 side opens as an opening 34 to house the motor 2.
- a disk-shaped frame 35 larger than the motor case 32 in outer circumference is fitted to the motor case 32 with screws 36 so as to cover the opening 34 of the motor case 32.
- the outer circumferential wall 15a of the fan cover 15 is secured tightly by a pressure fitting or the like to an outer circumferential edge 87 of the disk-shaped frame 35.
- the motor case 32 and the fan cover 15 are integrally affixed to each other.
- the disk-shaped frame 35 is therefore interposed between the motor case 32 and the fan cover 15.
- This disk-shaped frame 35 has an outer ring shaped plate portion 35a acting as the linking portion 18 and an inner disk shaped plate portion 35b integrally extending from the inner edge of the outer ring shaped plate portion 35a, as shown in Fig. 8.
- a plurality of openings 37 which are shaped like a fan as shown in Fig. 9 for instance, are formed in the inner disk shaped plate portion 39 to flow the air from the exhaust port 22 of the centrifugal fan 4 to the motor 2. These openings 37 are designed to secure a required rate of air for cooling the motor 2 according to the performance of the centrifugal fan 4.
- the bearing housing 13a is formed at substantially the center of the disk-shaped frame 35, protruding forward in a substantially cylindrical shape.
- the bearing 11a is housed in the bearing housing 13a, and the through hole 12 for the rotor shaft 3 is formed at its center.
- the outer ring shaped plate portion 35a positioned outside the outer circumferential wall 6a of the motor case 32 constitutes part of the partition wall 29a forming the air channel 29 between the exhaust port 22 of the centrifugal fan 4 and the motor 2, and which acts as the linking portion 18.
- the switching element 23 is fixed on the outer surface of this outer ring shaped plate portion 35a, and secured with the screw 30.
- the same functions and effects as in the first embodiment using the flange 31 can be achieved.
- the motor case 6, the fan cover 15 and the outer ring shaped plate portion 35a of the disk-shaped frame 35 constitute the case 5.
- the disk-shaped frame 35 of this embodiment is comprised of part of the partition wall 88 that forms the air channel 29 between the exhaust port 22 of the centrifugal fan 4 and the upper end of the motor 2 . Furthermore, the inner disk shaped plate portion 35b is arranged in a position farther upstream in the air flow direction than the motor 2 from which heat emits. This arrangement results in increase in a surface area of the disk-shaped frame 35 in contact with the air at the farther upstream than the motor 2 and accordingly a cooling effect of the disk-shaped frame 35 is enhanced. The switching element 23 therefore affixed integrally to this disk-shaped frame 35 is also cooled more efficiently.
- FIG. 10 A third preferred embodiment of the invention will now be described with reference to Fig. 10 through Fig. 12. While this embodiment is basically similar to the first embodiment, this embodiment applies the present invention to an electric blower 42 using a brushless motor 41 in place of the motor 2 with brushes.
- a drive control system including a drive circuit 27b for the brushless motor 41.
- the centrifugal fan 4 is rotated by the brushless motor 41 which is driven by an inverter circuit 44.
- the DC voltage is supplied to the inverter circuit 44 from a D.C. power supply unit 43.
- An electric blower control unit 45 for controlling the electric blower 42 is connected to drivers 46a through 46f, and controls the switching timing of switching elements 47a through 47f, which are power devices such as power MOSFET devices that constitute the inverter circuit 44.
- the D.C. power supply unit 43 consists of a battery combining a plurality of secondary cells, such as nickel cadmium (NiCd) cells, nickel hydrogen cells or lithium ion cells, or is a circuit which converts an A. C. voltage of a commercial A. C. power supply into a D.C. voltage under rectifying and smoothing. This D.C. voltage is supplied to the inverter circuit 44.
- NiCd nickel cadmium
- the inverter drive circuit 44 has a configuration in which six switching elements 47a through 47f are connected in a three-phase bridge structure. These switching elements 47a through 47f are driven by the high voltage side drivers 46a through 46c and the low voltage side drivers 46d through 46f on the basis of pulse signals supplied from the electric blower control unit 45 mainly consisting of a microcomputer 48. They supply A.C. to the windings 49a through 49c of the electric blower 42.
- the electric blower control unit 45 are connected with an operating unit 50 for starting, stopping or selecting power to supply to the electric blower 42, a current detecting means 51 for detecting a current flowing to the inverter circuit 44, and an input voltage detecting means 52 for detecting an input voltage.
- the electric blower control unit 45 is further connected with a position detecting means 55 for detecting magnetic poles of a rotor 54 surrounded by a stator 53.
- a position detecting means 55 for detecting magnetic poles of a rotor 54 surrounded by a stator 53.
- Three magnetic sensors arranged at electrical angle intervals of 120° are used as this position detecting means 55. Hole sensors and hole ICs may also be utilized as these magnetic sensors.
- Other methods for detecting the magnetic poles include, though not shown, a method using an optical pulse encoder and another method for detecting by a voltage phase detecting means the voltages induced by the windings 49a through 49c.
- terminals of the plurality of switching elements 47a through 47f which are power devices, are connected with wired patterns on a circuit board 56.
- bodies of the switching elements 47a through 47f are arranged on the outer surface of the linking portion 18 of the partition wall 88 and secured with the screws 30 or similar manners.
- the plurality of switching elements 47a through 47f must be considered.
- These switching elements 47a through 47f, as shown in Fig. 11 are arranged on substantially the same circle around the rotor shaft 3 of the brushless motor 41 and radially arranged at nearly equal intervals.
- the switching elements 47a through 47f can be effectively cooled without increasing pressure loss of the channel 29 of the electric blower 42. Since the drive circuit 27b of the brushless motor 41 in this embodiment is in particular configured of a plurality of switching elements 47a through 47f, this plurality of switching elements 47a through 47f are effectively cooled without increasing pressure loss of the channel 29 of the electric blower 42. This embodiment is therefore particularly effective.
- this plurality of switching elements 47a through 47f are radially arranged on substantially the same circumferential region around the rotor shaft 3, the unevenly distributed cooling of these switching elements 47a through 47f is reduced, and they are uniformly cooled, resulting in an increased cooling effect. It is therefore possible to stabilize the operation of the switching elements 47a through 47 and accordingly the operation of all the circuitry.
- This embodiment has been described as an application of the first embodiment and the second embodiment can also be applied using the disk-shaped frame 35.
- motor cases 6 and 32 in these embodiments are supposed to have bottomed structures for blocking, their rear plate 21 and 33 may also be blocked using separate members.
- switching element 23 or elements 47a through 47f such as Triac switches or power MOSFETs were used as a power device or devices.
- the present invention is not limited to these elements and is applicable to devices that emit heat during drive operation such as switching elements using insulated gate bipolar transistors (IGBTs). These elements can be used not only discretely but also in a packaged form or integrated into a device.
- IGBTs insulated gate bipolar transistors
- FIG. 13 A fourth preferred embodiment of the invention will now be described with reference to Fig. 13 through Fig. 15.
- This embodiment is an application of the electric blower 1 or 42 of any of the configurations described above for a vacuum cleaner, which is particularly suitable.
- the other applications are kitchen equipments or electric tools, for example food processors or power drills.
- a vacuum cleaner 61 as the present embodiment, is mounted with the electric blower 1.
- the vacuum cleaner 61 is mainly configured of a cleaner body 62 which constitutes the basic constituent of the vacuum cleaner 61, a hose 63 one of whose ends is detachably connected to the cleaner body 62, a manual operating unit 64 arranged at the other end of the hose 63, an extension pipe 65 of a bisected structure one of whose ends is connected to the manual operating unit 64, a suction inlet unit 66 detachably connected to the other end of the extension pipe 65, the electric blower 1 housed and held within the cleaner body 62, and a dust chamber 67 formed within the cleaner body 62.
- the hose 63 is connected to the cleaner body 62 in such a manner that its base end is made to communicate with the suction side of the electric blower 1 via the dust chamber 67.
- the manual operating unit 64 provided at the other end of the hose 63 is equipped with a grip 68 extending backwards and an operating means 69 positioned within manipulation range of the fingers of the operator holding this grip 68.
- the operating means 69 is equivalent to the operating unit 28 in Fig. 5.
- the operating means 69 also serves as the power switch for the electric blower 1, and is configured to allow selecting one of a plurality of operating modes in which this electric blower 1 is driven to different states of power. More specifically, there are successively arranged in a row, in the direction from the grip 68 to the extension pipe 65, a stop button 69a for setting the operating mode to a stopped state, a low power operation button 69b for setting low power operation, and a high power operation button 69c for setting high power operation. In high power operation mode for instance, the electric blower 1 turns at a high speed of 30,000 rpm and sucks up the dust.
- the cleaner body 62 has a body case 70.
- This body case 70 is configured by joining a lower case 70a which is open on the top face and formed for example of acrylonitrile butadiene styrene (ABS) or similar material, and an upper case 70b of the same material to block the rear top face of this lower case 70a with a bumper (not shown) being held by the circumferential edges including the front face, and is thereby formed into a case whose front upper face is open.
- a lid 71 is fitted to this body case 70, pivoting on it to make the opening in the front upper face closable.
- the body case 70 is fitted with turning wheels 72 on the front under face of the cleaner body 62 in the running direction, and following wheels 73 of a larger diameter are fitted to the rear side faces of the cleaner body 62.
- the turning wheels 72 and the following wheels 73 allow the vacuum cleaner 61 to move along the floor (not shown).
- a handle 74 which is vertically slidable is provided at the top of the cleaner body 62.
- a dust chamber 77 is partitioned and formed in the running direction of the cleaner body 62 within the cleaner body 62.
- a inside wall 76 having ventilated grids 75 is formed behind the dust chamber 77.
- the dust chamber 77 is opened upward.
- An electric blower chamber 78 for housing the electric blower 1 is partitioned and formed behind the dust chamber 77.
- a dust bag 90 is detachably fitted by a holder 79 formed within the dust chamber 77.
- auxiliary dust filter 91 covering those ventilated grids 75 is detachably fitted to the front side of the inside wall 76.
- This auxiliary dust filter 91 has a frame 92 and an auxiliary filter 93 to be snapped onto this frame 92.
- the dust bag 90 and the auxiliary dust filter 91 are attached or detached through the top opening of the dust chamber 77.
- the lid 71 whose rear end pivots on the upper case 70b, is formed so as to cover the dust chamber 77 from above.
- the electric blower 1 is provided within the electric blower chamber 78.
- This electric blower 1 is structured in the same way as the electric blower 1 as the first preferred embodiment of the invention.
- an electric blower outlet 94 On the circumferential surface near the rear'part of the motor case 6 is opened an electric blower outlet 94 as the exhaust port. Though not shown, the electric blower outlet 94 may also be formed in the rear surface of the motor case 6.
- the centrifugal fan 4 rotates integrally with that rotation, and this rotation guides air from the intake opening 16 of the fan cover 15 through the centrifugal fan 4, its exhaust port 22, the diffuser 14 and the motor 2 to the electric blower outlet 94.
- An airtight supporter 95 which is an annular and made of natural rubber or synthetic rubber for instance, is fitted into the front end of the outer circumferential edge of the electric blower 1.
- an upper rib front 78a and a lower rib front 78b constituting part of a chamber wall of the electric blower chamber 78 are protrusively formed at the lower face of the upper case 70b and the upper face of the lower case 70a.
- the airtight supporter 95 is brought into contact with the upper rib front 78a and lower rib front 78b to set the electric blower 1 in the electric blower chamber 78.
- a negative pressure generated by the drive of the electric blower 1 deforms the airtight supporter 95.
- this airtight supporter 95 makes an airtight communication between the intake opening 16 of the electric blower 1 and the dust chamber 77 via the ventilated grids 75.
- the airtight supporter 95 has a substantial L-shaped section and is arranged between the outer surface of the fan cover 15 and the chamber wall of the electric blower chamber 78.
- the airtight supporter 95 is made of absorbing vibration material which is natural rubber or synthetic rubber, for instance, as mentioned above.
- the switching element 23 as the power device to drive the electric blower 1 is directly fixed to the outer surface of the case 5
- the vibration of the body case 70 caused by steps and/or unevenness of floors is directly transmitted to the switching element 23 when the vacuum cleaner 61 is moved on the floors.
- the airtight supporter 95 of the absorbing vibration material, it is possible to suppress the transmission of vibrations from the body case 70 and thereby increase the mechanical reliability of the switching element 23.
- the airtight supporter 95 is affected by heat from the switching element 23 when the electric blower 1 is being driven. Therefore, by using highly heat resisting material, such as silicone rubber or ethylene propylene rubber for the airtight supporter 95, the thermal reliability of the vacuum cleaner 61 can be enhanced.
- the airtight supporter 95 of thermally insulated material, which is natural foam rubber or synthetic foam rubber having a lot of air bubbles inside. Since foam material even of the same component parts may differ in thermal insulation performance if density of the air bubbles varies, the density should be adjusted according to the level of heat caused by the switching element 23.
- the material of the airtight supporter 95 is chosen from among the absorbing-vibration material, heat resisting material or thermally insulated material and/or the component parts are adjusted.
- An electric blower mounted in the vacuum cleaner 61 may be not only the electric blower of the first embodiment but that of other embodiments.
- a cooling opening 100 is formed on the partition wall 88 near the switching element 23.
- the cooling opening 100 is formed at a position where a blown air directly hits the switching element 23 or a position where the blown air directly gives rise to forced convection around the switching element 23.
- Fig. 16 specifically shows a case in which the cooling opening 100 is formed on the partition wall 88 parallel to the rotor axis 3 in the vicinity of the fixed switching element 23.
- the number of cooling openings 100 may be one or more.
- FIG. 17 specifically shows a case in which a plurality of cooling openings 101 are formed on the flange 31 orthogonal to the rotor shaft 3 in the vicinity of the switching elements 47a through 47f.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Motor Or Generator Cooling System (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003141344 | 2003-05-20 | ||
JP2003141344 | 2003-05-20 | ||
JP2003201695A JP2005040251A (ja) | 2003-07-25 | 2003-07-25 | 電気掃除機 |
JP2003201695 | 2003-07-25 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1479335A2 true EP1479335A2 (de) | 2004-11-24 |
EP1479335A3 EP1479335A3 (de) | 2006-05-31 |
EP1479335B1 EP1479335B1 (de) | 2010-03-10 |
Family
ID=33100433
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04252453A Expired - Fee Related EP1479335B1 (de) | 2003-05-20 | 2004-04-28 | Elektrogebläse und damit ausgerüstetes Elektrogerät |
Country Status (4)
Country | Link |
---|---|
US (1) | US20040231090A1 (de) |
EP (1) | EP1479335B1 (de) |
CN (1) | CN100545462C (de) |
DE (1) | DE602004025874D1 (de) |
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CN104948478A (zh) * | 2014-03-26 | 2015-09-30 | 霍尼韦尔国际公司 | 具有形成扩散器的壁的热屏蔽的电动机驱动的压缩机 |
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US6856113B1 (en) | 2004-05-12 | 2005-02-15 | Cube Investments Limited | Central vacuum cleaning system motor control circuit mounting post, mounting configuration, and mounting methods |
JP3942605B2 (ja) | 2004-05-17 | 2007-07-11 | 東芝テック株式会社 | モータ制御装置及び電気機器 |
WO2006029535A1 (en) | 2004-09-17 | 2006-03-23 | Cube Investments Limited | Cleaner handle and cleaner handle housing sections |
JP2006161620A (ja) * | 2004-12-03 | 2006-06-22 | Toshiba Tec Corp | 電動送風機、及びその組立方法 |
US20060204383A1 (en) * | 2005-03-08 | 2006-09-14 | Hiroyuki Kushida | Electric vacuum cleaner |
JP4079962B2 (ja) * | 2005-08-30 | 2008-04-23 | 株式会社東芝 | 電気掃除機 |
US7690075B2 (en) | 2005-10-07 | 2010-04-06 | Cube Investments Limited | Central vacuum cleaner control, unit and system with contaminant sensor |
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EP2169236A1 (de) * | 2008-09-24 | 2010-03-31 | Fandis S.p.A. | Gebläsevorrichtung zum Rauchabsaugen, insbesondere für ein Ofen für Brennstoffpellets |
ITTO20080960A1 (it) * | 2008-12-22 | 2009-03-23 | Fandis S P A | Gruppo ventilatore per estrazione di fumi, in particolare per stufa a pellet |
US9709068B2 (en) | 2014-02-19 | 2017-07-18 | Honeywell International Inc. | Sealing arrangement for fuel cell compressor |
US9732766B2 (en) | 2014-02-19 | 2017-08-15 | Honeywell International Inc. | Electric motor-driven compressor having a heat shield forming a wall of a diffuser |
CN104948478A (zh) * | 2014-03-26 | 2015-09-30 | 霍尼韦尔国际公司 | 具有形成扩散器的壁的热屏蔽的电动机驱动的压缩机 |
EP2924294A3 (de) * | 2014-03-26 | 2015-10-28 | Honeywell International Inc. | Elektromotorgetriebener verdichter mit hitzeschild zur herstellung einer wand eines diffusors |
US9537363B2 (en) | 2014-04-30 | 2017-01-03 | Honeywell International Inc. | Electric motor-driven compressor having an electrical terminal block assembly |
Also Published As
Publication number | Publication date |
---|---|
CN1573121A (zh) | 2005-02-02 |
US20040231090A1 (en) | 2004-11-25 |
EP1479335A3 (de) | 2006-05-31 |
EP1479335B1 (de) | 2010-03-10 |
CN100545462C (zh) | 2009-09-30 |
DE602004025874D1 (de) | 2010-04-22 |
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