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41. 发明专利

JPS6392248A AC COMMUTATOR MOTOR FOR VACUUM CLEANER 失效
公开(公告)号：JPS6392248A
公开(公告)日：1988-04-22
申请号：JP23464686
申请日：1986-10-03
申请人： HITACHI LTD
发明人： TAWARA KAZUO , OHARAGI HARUO , ABE TAKASHI , YAMASHITA NOBUYUKI , JORAKU FUMIO
IPC分类号： H02K27/02
摘要： PURPOSE:To improve commutation performance, by setting the turn ratio of the number of the turns of a front coil to the number of the turns of a rear coil, to be 1.6-3.2, and by selecting brush resistivity according to the ratio. CONSTITUTION:In an AC commutator motor for a vacuum cleaner, field windings 32 are excited by desired output via an input controller 3, and current is permitted to flow to an armature winding 24 via a commutator 26 through brushes 28, and the fan of a shaft 16 is rotated. On this motor, an armature core 20 is fixed on the shaft 16 and in the slot 18 of the core 20, the armature winding 24 is wound up. At one end of the shaft 16, the commutator 26 is fixed and is permitted to come in contact with the brushes 28 pressed by elastic units 29 in brush retainers 31. In this case, the ratio of the number of the turns of a front coil side to the number of the turns of a rear coil side is selected to be 1.6-3.2, and the resistivity of brush members is set to be (2-8.2)X10 muOMEGA-cm. Then, even if input is increased, the commutation performance of coils can be uniformed.

42. 发明专利

JPS6345494A MOTOR-DRIVEN BLOWER 失效
公开(公告)号：JPS6345494A
公开(公告)日：1988-02-26
申请号：JP18850986
申请日：1986-08-13
申请人： HITACHI LTD
发明人： JORAKU FUMIO , TOYOSHIMA HISANORI
IPC分类号： F04D29/44
摘要： PURPOSE:To improve the blowing efficiency by fitting the inner peripheral part of a fixed guide vane for introducing air into a motor from a wind hole formed onto the outer peripheral side surface of an end bracket onto the outer peripheral side surface of the end bracket. CONSTITUTION:An air stream supplied from a centrifugal vane wheel 6 is sent into a motor through a diffuser 7a and a wind hole 20. The inner peripheral part 2 of a fixed guide vane 7 is fitted with the outer peripheral side surface of an end bracket 3. In the fitting part in the space 50 between the fixed guide vane 7, end bracket 3, and the centrifugal vane wheel 6, the pressure reduction is little, and the fitting part is easily made airtight, and the blowing efficiency can be increased.

43. 发明专利

JPS61244253A ROTARY ELECTRIC MACHINE OF COMMUTATOR TYPE 失效
公开(公告)号：JPS61244253A
公开(公告)日：1986-10-30
申请号：JP8226885
申请日：1985-04-19
申请人： HITACHI LTD
发明人： JORAKU FUMIO , TOYOSHIMA HISANORI
IPC分类号： H02K13/00 , H02K5/14 , H02K5/20 , H02K9/06 , H02K9/28 , H02K27/00 , H02K27/04
摘要： PURPOSE:To cool a brush holder effectively, by providing a ring-shaped current plate having a rib for collecting and conducting cooling air to the brush holder, between a field core and the brush holder. CONSTITUTION:A rotor 30 is rotatably supported by bearings 31, 32 at the both ends. A commutator 33 comes in sliding contact with a carbon brush 28 for rectifying action. A centrifugal fan 34 is fitted at the side end of the end bracket 3 of the rotor 30, and air stream due to the centrifugal fan 34 flows through a conducting stream passage organized with a stationary conducting blade 35 fixed on the end bracket 3 and with a fan casing 36, and flows into a motor 1. Then, air stream is concentrated on the commutator 33 section by the current plate of a current plate assembly 14, to be cooled. After that, air stream cools a brush holder 4 and is discharged through the aperture of the housing 1.

44. 发明专利

JPS6144498B2 失效
公开(公告)号：JPS6144498B2
公开(公告)日：1986-10-03
申请号：JP10728179
申请日：1979-08-24
申请人： HITACHI LTD
发明人： JORAKU FUMIO , HATA MASAO
IPC分类号： A47L11/34 , D06G1/00

45. 发明专利

JPS61218395A CONTROL CIRCUIT FOR AC POWER 失效
公开(公告)号：JPS61218395A
公开(公告)日：1986-09-27
申请号：JP5692685
申请日：1985-03-20
申请人： HITACHI LTD
发明人： HOSOKAWA ATSUSHI , JORAKU FUMIO
IPC分类号： A47L9/28 , H02P25/04 , H02P27/02
摘要： PURPOSE:To suppress the difference of power consumption of AC power sources of different frequencies as small as possible by reducing a power source voltage by a transformer and applying it to a controller. CONSTITUTION:A transformer 5 is inserted between an AC power source 1 and a rectifier 13. In other words, the transformer 15 reduces the voltage (100V) of the power source 1 to a voltage (e.g., 20-40V) of the degree which does not obstruct the operation of a trigger element 6, and outputs it to the rectifier 13. The low voltage is rectified by the rectifier 13, and applied to charger/ discharger 7, 8 for applying the voltage synchronized with the frequency of a power source to the element 6. As a result, since the difference of the power consumption by the frequency difference of 50 and 60Hz is reduced by the same circuit, when the circuit is associated in an electric device, it can be manufactured commonly in both 50/60Hz districts with the same circuit.

46. 发明专利

JPS61131721A Wet and dry type cleaner 失效
标题翻译：湿式干式清洗机
公开(公告)号：JPS61131721A
公开(公告)日：1986-06-19
申请号：JP25188484
申请日：1984-11-30
申请人： Hitachi Ltd
发明人： SUGA HISANAKA , JORAKU FUMIO
IPC分类号： A47L7/00

47. 发明专利

JP2003052587A Vacuum cleaner 有权
标题翻译：吸尘器
公开(公告)号：JP2003052587A
公开(公告)日：2003-02-25
申请号：JP2001240953
申请日：2001-08-08
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： HAYASHI SHOJI , TAJIMA TAIJI , SATO SHIGENORI , SATO SUSUMU , JORAKU FUMIO , UMEZAWA KOICHI , TAKEUCHI HIROSHI
IPC分类号： A47L9/00 , A47L5/30 , A47L9/02 , A47L9/04
摘要： PROBLEM TO BE SOLVED: To provide an easy-to-use and small cleaner that helps downsize a dust chamber, effectively accumulate dust in the dust chamber and prevent a dust filter from getting clogged by dust.
SOLUTION: The vacuum cleaner has a suction opening having an opening facing a surface to be cleaned, a brush chamber provided on the opening side of the suction opening, an electric blower, the rotating shaft of which is arranged in parallel with the longitudinal direction of the suction opening, and a dust chamber. In an air passage communicatively connecting the dust chamber and the electric blower, the entrance side central axis of the air passage is arranged nearer the brush chamber side than the central axis parallel with the longitudinal direction of the suction opening of the dust chamber.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：为了提供易于使用的小型清洁器，有助于减小灰尘室的尺寸，有效地积聚灰尘，并防止灰尘过滤器被灰尘堵塞。解决方案：真空吸尘器具有吸入口，其具有面向待清洁表面的开口，设置在吸入口开口侧的刷室，电动鼓风机，其旋转轴与纵向方向吸入口和灰尘室。在通气地连通集尘室和电动鼓风机的空气通道中，空气通道的入口侧中心轴布置成比与灰尘室的吸入口的纵向方向平行的中心轴线更靠近刷室侧。

48. 发明专利

JP2001342997A ELECTRIC BLOWER AND VACUUM CLEANER 失效
公开(公告)号：JP2001342997A
公开(公告)日：2001-12-14
申请号：JP2000169057
申请日：2000-06-01
申请人： HITACHI LTD
发明人： SUGIMURA KAZUYUKI , JORAKU FUMIO , TANAKA TEIJI , HAYASHI SHOJI
IPC分类号： A47L9/00 , F04D29/44 , F04D29/66
摘要： PROBLEM TO BE SOLVED: To provide a compact, high-efficiency and low-noise electric blower and vacuum cleaner by reducing separation in a stationary passage of a duct. SOLUTION: The electric blower and the vacuum cleaner has the duct 11 for forming the stationary passage 14 extending from laterally outward of a supply opening 12b of a centrifugal impeller 12 to the outward in the circumferential direction and in the axial direction, and a fan casing 13 for containing the centrifugal impeller 12 and the duct 11, forms a plurality of continuous stationary passages 14 which are independent from the duct 11, and smoothes change in a flow passage sectional area in the flow direction of air of a plurality of stationary passages 14.

49. 发明专利

JP2001342992A ELECTRIC BLOWER 失效
公开(公告)号：JP2001342992A
公开(公告)日：2001-12-14
申请号：JP2000164744
申请日：2000-05-30
申请人： HITACHI LTD
发明人： AKOSHIMA KAZUHIRO , JORAKU FUMIO , TOYOSHIMA HISANORI
IPC分类号： A47L9/00 , F04D29/16 , F04D29/44
摘要： PROBLEM TO BE SOLVED: To improve watertightness in a sealing member 17 for preventing a circulating flow wherein a flow of air from a fan 12 passes through clearance between a casing 14 and the fan 12 then flows back in the fan 12 in an electric blower using a centrifugal fan. SOLUTION: In this device, the seal member is provided by laminating a thinly mill material in a cylindrical shape and cutting it in a required width, not provided with an annular sealing member 17 by simply blanking a sheet subjected to a mill process as conventional method.

50. 发明专利

JP2001065494A ELECTRIC AIR BLOWER AND ASSEMBLING METHOD OF CENTRIFUGAL FAN 失效
公开(公告)号：JP2001065494A
公开(公告)日：2001-03-16
申请号：JP24315599
申请日：1999-08-30
申请人： HITACHI LTD
发明人： AKOSHIMA KAZUHIRO , JORAKU FUMIO , HARADA HIDEYUKI
IPC分类号： F04D29/16 , F04D29/28
摘要： PROBLEM TO BE SOLVED: To prevent or suppress circulating flow through an air tight member by forming an outer surface cut at a distnace of a radius R from a rotary center of a centrifugal fan on an air flow-in part of a front plate. SOLUTION: A tip end part of a front plate 21 is cut at a distance of a radius R from a nearly center 34 of a rotary shaft hole so as to form an oiuter surface 33. When a centrifugal fan around a rotary shaft 36 is rotated, a distance between the rotary shaft 36 and the outer surface 33 is held coinstantly at every points on a circumference. Accordingly, abrasion of a seal member caused by rotary sliding of a seal part 37 is not increased. Namely, the relation of a distance 11, 12 between the rotary shaft 36 and the right and left outer surfaces is 11=12. In this case, the relation of the thickness t1, t2 of the seal part 37 is t1≠t2 in the normal case. The inner surface of the air flow-in part 32 is cut, and thereby, the relation between the thickness t1, t2 is t1=t2. It is thus possible to suppress abrasion of the seal member, and it is also possible to reduce a leakage air quantity.

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