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1. 发明专利

JP2003000478A Motor-driven blower and vacuum cleaner using the same 审中-公开
标题翻译：使用电机驱动的鼓风机和真空清洁器
公开(公告)号：JP2003000478A
公开(公告)日：2003-01-07
申请号：JP2001192042
申请日：2001-06-25
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： HARADA HIDEYUKI , JORAKU FUMIO , AKOSHIMA KAZUHIRO
IPC分类号： A47L9/00 , A47L9/28
CPC分类号： Y02B40/84
摘要： PROBLEM TO BE SOLVED: To provide a light, compact, and usable vacuum cleaner with high- security which immediately detects an unusual heating of a motor-driven blower.
SOLUTION: The vacuum cleaner is provided with a protective device 19 for shutting off or regulating electric power supplied to the motor-driven blower, the protective device has a holding member 20 and is fixed to a housing 2 by inserting a part of a flange into a fixing hole 21 provided on the outer periphery of the housing 2, and a detecting portion of the protective device is brought into contact with the housing.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：提供一种轻巧，紧凑，可用的高安全性真空吸尘器，可立即检测电机驱动风机的异常加热。解决方案：真空吸尘器设有一个保护装置19，用于关闭或调节供应给电动鼓风机的电力，保护装置具有保持构件20，并通过将一部分凸缘插入到壳体2中设置在壳体2的外周上的固定孔21和保护装置的检测部分与壳体接触。

2. 发明专利

JP2002000524A VACUUM CLEANER 失效
公开(公告)号：JP2002000524A
公开(公告)日：2002-01-08
申请号：JP2000184714
申请日：2000-06-20
申请人： HITACHI LTD
发明人： AKOSHIMA KAZUHIRO , JORAKU FUMIO , TAWARA KAZUO , ENDO TSUNEHIRO , IWASE KOJI
IPC分类号： A47L9/28
摘要： PROBLEM TO BE SOLVED: To obtain a sufficient sucking force even at d.c. power operation of a vacuum cleaner which is operable by both a.c. and d.c powers and to prolong the operable life of the electric motor. SOLUTION: Instead of a conventional a.c. commutator motor, a brushless motor or an inductive motor, which do not have a mechanical contact such as a commutator and the like, is used for the motor in the electric blower. The control circuit for driving the motor has a constitution having a booster converter and an inverter.

3. 发明专利

JP2001073994A ELECTRIC AIR BLOWER AND ELECTRIC VACUUM CLEANER THEREWITH 失效
公开(公告)号：JP2001073994A
公开(公告)日：2001-03-21
申请号：JP24479799
申请日：1999-08-31
申请人： HITACHI LTD
发明人： HAYASHI SHOJI , TANAKA TEIJI , SUGIMURA KAZUYUKI , SATO SHIGENORI , JORAKU FUMIO
IPC分类号： A47L9/00 , F04D17/10 , F04D25/08 , F04D29/30 , F04D29/44
摘要： PROBLEM TO BE SOLVED: To rotate flow of air from a centrifugal impeller at a diffuser part with a good efficiency serving dynamic pressure as static pressure, and improve an air blower efficiency by arranging a recessed part on a part of an outer end part opposed to a diffuser of the blade in a centrifugal impeller. SOLUTION: An electric air blower is provided with a centrifugal impeller 12 and a diffuser 11 having a plurality of air guides 11a disposed on an outer peripheral part of the centrifugal impeller 12. A cutout part 12e is disposed on a part of an outer end part of the blade 12a other than a shroud side plate 12e side of the centrifugal impeller 12. In a part where the cutout 12e is disposed on the blade 12a, the blade 12 is apparently formed in a small size comparing with a part other than the cutout part 12e. In flow 12 of air that flows out from an outlet part of the centrifugal impeller 12, main flow slantly flows a part where the cutout part is not disposed on the blade 12. Namely, in the flow 102 of air which flows in the diffuser 11, main flow slantly flows also a wall surface side of a fan casing side of the diffuser 11.

4. 发明专利

JP2000356197A ELECTRIC BLOWER 失效
公开(公告)号：JP2000356197A
公开(公告)日：2000-12-26
申请号：JP16577799
申请日：1999-06-11
申请人： HITACHI LTD
发明人： AKOSHIMA KAZUHIRO , JORAKU FUMIO
IPC分类号： F04D29/28 , F04D29/62
摘要： PROBLEM TO BE SOLVED: To improve the aerodynamic performance of an impeller by providing a blade and a mount hole on the surface of a front plate having a suction port, which surface is opposed to a rear plate having a mount hole for inserting the drive shaft of an electric motor, and mounting the front plate and the rear plate one over another on the drive shaft through each mount hole. SOLUTION: A front plate 52 has a suction port 51, and a thick part 53A for enhancing the mechanical strength is formed in the center of a rear plate 53. Further, the front plate 52 has a blade 54 and an air discharge port 55, and a disc-like mount plate 56 is integrally formed on the suction port side of each blade 54. A mount hole to be mounted on the rotating shaft 26 of an electric motor is formed in the center of the front plate 52. The front plate 52, the blade 54 and the mount plate 56 are integrally formed by injection molding, and assembled to the electric motor together with the rear plate 53, whereby the air resistance and noise resulted from a caulking projection can be reduced. Since the blade 54 is closely connected to the rear plate 53, the aerodynamic performance of the electric blower can be improved.

5. 发明专利

JP2000179495A ELECTRIC FAN 失效
公开(公告)号：JP2000179495A
公开(公告)日：2000-06-27
申请号：JP36094598
申请日：1998-12-18
申请人： HITACHI LTD
发明人： HARADA HIDEYUKI , JORAKU FUMIO , AKOSHIMA KAZUHIRO
IPC分类号： F04D29/16 , F04D17/10 , F04D29/44
摘要： PROBLEM TO BE SOLVED: To effectively seal a seal member for sealing a space between a centrifugal fan and a fan casing by retaining it by a seal retaining member. SOLUTION: This electric fan is constituted of a fan casing 15 mounted to a housing of a motor and formed so as to cover a centrifugal fan and a diffuser; a curved portion 23 circularly formed on the suction hole 16 of the fan casing coaxially to a suction hole of the centrifugal fan; a seal member 20 slidably contacted with the suction hole of the centrifugal fan in the state that it is retained by a seal retaining member 21; and a seal presser member 25 mounted to the fan casing and pressing the seal member 20. The seal retaining member 21 is provided with a recess groove 22 engaged with the seal member 20 and engagement-retains the seal member 20 on the curved portion 23.

6. 发明专利

JP2000154797A MOTOR-DRIVEN BLOWER AND VACUUM CLEANER USING THE SAME 失效
公开(公告)号：JP2000154797A
公开(公告)日：2000-06-06
申请号：JP32924698
申请日：1998-11-19
申请人： HITACHI LTD
发明人： AKOSHIMA KAZUHIRO , JORAKU FUMIO , TOYOSHIMA HISANORI , OBANA TAKESHI
IPC分类号： A47L9/00 , F04D29/08 , F04D29/16 , F04D29/28 , F04D29/44
摘要： PROBLEM TO BE SOLVED: To reduce lowering of blowing efficiency by providing an air flow reflux preventing means for preventing a part of air flow from a centrifugal fan from refluxing to an air intake between the centrifugal fan and a casing and integrally molding either one of front and rear plates and a blade by using a magnesium alloy. SOLUTION: A fan 12 is constituted by integrally manufacturing a front surface plate 12a and a blade 12c by injection molding by using a magnesium alloy as a molding material and by assembling a rear surface plate. As a result, leakage between adjacent air channels at the inside of the fan 12 can be remarkably reduced. On an end face of an air intake 12' of the front surface plate 12a constituting the fan 12, a plurality of annular grooves 15 are formed, and tips of the annular grooves 15 and a plane part provided with an air intake 14' of a casing 14 are opposed with a very small gap. A part of air flow refluxing to the air intake 12' side of the fan 12 again through a gap between the fan 12 and the casing 14 extends in groove space in the annular grooves 15, slows flow velocity and shows a staying tendency.

7. 发明专利

JP2000073994A ELECTRIC BLOWER 失效
公开(公告)号：JP2000073994A
公开(公告)日：2000-03-07
申请号：JP24691298
申请日：1998-09-01
申请人： HITACHI LTD
发明人： HARADA HIDEYUKI , JORAKU FUMIO , TOYOSHIMA HISANORI , KAWAGUCHI TAKAO , TAKAGI HIROAKI
IPC分类号： F04D17/10 , F04D29/42 , F04D29/44
摘要： PROBLEM TO BE SOLVED: To realize a highly efficient electric blower by preventing part of the air current flowing from a centrifugal fan into a diffuser through a space between a fan casing and the upper surface of a diffuser from flowing in the circumferential direction. SOLUTION: The electric blower, which includes a centrifugal fan 12 directly connected to the rotary shaft of an electric motor, a diffuser 13 arranged on the outer circumferential side of the centrifugal fan 12, and a fan casing 15 covering the centrifugal fan 12 and the diffuser 13, is applied with an adhesive on at least either the inner surface of the fan casing 15 adjoining the diffuser 15 or the end of the diffuser 13 adjoining the inside of the fan casing 15.

8. 发明专利

JP2000064992A ELECTRIC BLOWER 失效
公开(公告)号：JP2000064992A
公开(公告)日：2000-03-03
申请号：JP22977598
申请日：1998-08-14
申请人： HITACHI LTD
发明人： OBANA TAKESHI , NAKAMURA KIYOMI , ABE TERUYOSHI , AONO YASUHISA , JORAKU FUMIO , TOYOSHIMA HISANORI , AKOSHIMA KAZUHIRO
IPC分类号： A47L9/00 , F04D17/10 , F04D29/42 , F04D29/44
摘要： PROBLEM TO BE SOLVED: To provide an electric blower preventing generation of a circulation flow at a high speed rotation by forming a front shroud of an impeller constituting the electric blower by a magnesium alloy and disposing a high melting point member at an inlet port edge portion of the front shroud. SOLUTION: In an electric blower being provided with an impeller 212 having a front shroud having an inlet port, a back shroud and a plurality of blades inserted between the front shroud and the back shroud; a fan casing covering the impeller 212 and a fixed guide blade 214 and being provided with a shield member 222 slidably contacted with an inlet port edge of the front shroud in an inner surface thereof; and an electric motor 217 driving the impeller 212, at least front shroud of the impeller 212 is formed by a magnesium alloy and a high melting point member is adhered to the inlet port edge of the front shroud.

9. 发明专利

JPH1080107A BRUSH DEVICE OF ROTATING MACHINE 失效
公开(公告)号：JPH1080107A
公开(公告)日：1998-03-24
申请号：JP23385096
申请日：1996-09-04
申请人： HITACHI LTD
发明人： AKOJIMA KAZUHIRO , JORAKU FUMIO , TOYOSHIMA HISANORI
IPC分类号： H02K13/00
摘要： PROBLEM TO BE SOLVED: To provide an efficient rotating machine by reducing the electric loss caused by the contact between a brush and a commutator. SOLUTION: This rotating machine has a brush 8 whose end face slides on a rotating armature 7 and also which is connected electrically with the armature 7, and the sliding face with the said armature of the brush is provided with at least one hole 13a and 13b or recess, and the inner faces of the holes 13a and 13b or the recesses are plated with metal. Or, this rotating machine has a brush 8 whose end face slides on a rotating armature 7 and also which is connected electrically with the armature 7, and the sliding face with the said armature of the brush is provided with at least one hole 13a and 13b or recess, and the holes 13a and 13b or the recesses are charged with conductive paste.

10. 发明专利

JPH1073094A MOTOR-DRIVEN BLOWER 失效
公开(公告)号：JPH1073094A
公开(公告)日：1998-03-17
申请号：JP22970896
申请日：1996-08-30
申请人： HITACHI LTD
发明人： JORAKU FUMIO , AKOSHIMA KAZUHIRO , IKEDA RYUJI , IWASE KOJI , SATO SHIGENORI
IPC分类号： F04D29/44
摘要： PROBLEM TO BE SOLVED: To integrated a junction between a return guide vane and an opening part so as to reduce any loss of flow gas by forming an approximately rectangular cylindrical guide vane while providing those ribs provided on both side faces of approximately planar end bracket for supporting the impeller side bearing of an electric motor, so as to be placed along a return guide vane. SOLUTION: A rotor having its rotary shaft and a stator 15 having a stator coil 14 wound around it are arranged in the casing of the electric motor of a motor-driven blower. Ribs 20 are provided on both side surfaces of an end bracket 11 to be opposed to a return guide vane side, but in the case, by forcing the ribs 20 to oppose to each other to be placed along the return guide vanes 6a, 6e, 6f, 6j, the sectional surfaces act as respective partial portions of the opening part 19 of an inter-vane passage and an electric motor by forming approximately rectangular cylindrical wall body so as to provide smooth connection between the entire inter-vane passage and the opening part 19. In addition, no rib 20 is provided and any flow in a flow passage may not be disturbed, in those parts corresponding to inter-vane passages 21a, 21d, 21e, 21h flowing through a space below the end bracket 11.

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