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51. 发明专利

JP2002081672A AIR CONDITIONER 失效
公开(公告)号：JP2002081672A
公开(公告)日：2002-03-22
申请号：JP2000276609
申请日：2000-09-07
申请人： HITACHI LTD
发明人： TAKADA YOSHIHIRO , MORIMOTO MOTOO , OTA KAZUTOSHI , MATSUBARA EISUKE
IPC分类号： F24F1/00 , F24F13/30
摘要： PROBLEM TO BE SOLVED: To eliminate the problem with prior art that a room air conditioner using a reflux fan as a fan for an indoor machine can be improved in performance of a heat exchanger by converting the air volume to a high level, but a noise level is raised in accordance with such a high air volume. SOLUTION: A reflux fan 7 is adapted such that air sucked from openings 1, 2 in the front surface and in the upper surface of an indoor machine is diffused from a nozzle at a lower portion of the indoor machine through heat exchangers 3, 4, 5. The reflux fan 7 is provided on a downstream side from the heat exchangers 3, 4, 5. An angle is set over 180 degree at the heater exchanger side in the vertical section, at the intersection of the line between the extremity of the front nose 8 and the center of the shaft of the reflux fan 7 and the line between the rear nose 7 and the center of the fan shaft.

52. 发明专利

JP2001050189A AIR CONDITIONER 失效
公开(公告)号：JP2001050189A
公开(公告)日：2001-02-23
申请号：JP21957699
申请日：1999-08-03
申请人： HITACHI LTD
发明人： HAKAMAYA NOBUSUKE , TAKADA YOSHIHIRO , MORIMOTO MOTOO , MATSUBARA EISUKE , MIYAZAKI NORIO
IPC分类号： F04D17/04 , F04D17/16
摘要： PROBLEM TO BE SOLVED: To increase a wind quantity while suppressing generation of blade noise by differing curvatures of maximum outer diameter parts of both side blades serving the maximum outer diameter part as a boundary, in a device provided with a fan wherein a plurality of blades are attached in the outer peripheral direction of disk plates, and the maximum outer diameter part is disposed on each blade. SOLUTION: When an impeller 2 as a percolation fan composed of blades 1 and disk plates 9 is rotated, air sucked from a grill 11 arranged on a front suction port 17 of a decorative frame 8 and an upper grill 3 through a filter 12 is passed a nose 10 and the impeller 2, and then, the air is blown out from a blowout port on which vertical and horizontal wind direction plates 13, 5 are disposed. In this case, in the blades 1, those outer shapes are changed between disk plates 9, and are set maximum between the disk plates 9. In association with rotation of the impeller 2, air is firstly passed near the nose 10 from the maximum outer diameter part of the blades 1, and passing phase of the blades 1 crossing rear flow in the nose 10 or a thermal exchanger 4 is changed. It is thus possible to increase a wind quantity while reducing blade noise.

53. 发明专利

JP2000325717A FAN FILTER UNIT 失效
公开(公告)号：JP2000325717A
公开(公告)日：2000-11-28
申请号：JP14279499
申请日：1999-05-24
申请人： HITACHI LTD
发明人： TAKADA YOSHIHIRO , ISHIKAWA TOMINORI , YOKOYAMA MAKOTO , TOYAMA YUJI
IPC分类号： B01D46/00 , B01D46/52 , F24F7/06
摘要： PROBLEM TO BE SOLVED: To reduce a demand caused by many manufacturing apparatus while making a fan filter unit thin-typed is achieved by a method wherein a filter for cleaning air and a casing for feeding the air are provided, and one set of opposed side edge parts of a top of the casing are inclined to a filter face. SOLUTION: A casing comprising a top 4 and a side plate 11 is installed to an upper part of a filter 1. Further, a hole for installing a motor 2, a support spacer 6 for a motor support plate 5, and a suction pipe 7 is opened to an upper part of the top 4. Further, a turbofan 3 is attached to the motor 2, and a guard 8 for preventing inflow of foreign matter is attached to a suction face of a suction pipe 7. In this case though a part corresponding to suction of the fan 3 is almost parallel to a face of the filter 1, an inclined part 9 is provided to one set of opposed side edge parts of the top 4. Then, air is sucked from the upper part by rotation of the fan 3, guided smoothly by the inclined part 9 of the top 4, sent to the filter 1, and the air is cleaned.

54. 发明专利

JP2000065418A AIR CONDITIONER 失效
公开(公告)号：JP2000065418A
公开(公告)日：2000-03-03
申请号：JP23811298
申请日：1998-08-25
申请人： HITACHI LTD
发明人： TAKADA YOSHIHIRO , HAKAMAYA NOBUSUKE , MORIMOTO MOTOO , YOKOYAMA HIDENORI , HAMADA SUSUMU , WADA HIROMI , NAKAGAWA YOJI
IPC分类号： F24F5/00 , F24F1/40 , F24F1/56 , F24F3/06 , F24F13/00 , F24F13/08
摘要： PROBLEM TO BE SOLVED: To decrease a noise between horizontal mutins and to increase a wind volume by bending air upstream side of a sash bar perpendicular to a rotating direction of a fan to meet a discharge angle of the air. SOLUTION: A fan 14 having blades 11 is rotated down. A mouth ring 12 and a diffusing enlarged part 13 are disposed in its air outlet. Further, a curvature guard 5 is disposed at a part in which an advancing direction of the fan perpendicularly crosses a longitudinal direction of flat plate-like horizontal mutins 3 at its downstream. The mutins 3 are disposed above and below the guard 5 (1). Since the air outflow from the fan has an angle α2, a front edge of the guard 5 is formed in a circular arc-like state to meet the outflow angle of the air, and formed axially in a flat plate-like state similar to the mutins. Thus, when the front edge of the guard 5 is formed in the arc-like state, an angle of entering the air matches the front edge of the guard 5. Accordingly, since the air flows to crawl a rear surface of the guard, a flow of the air is not released from the guard (3).

55. 发明专利

JP2000064991A AIR-CONDITIONER 失效
公开(公告)号：JP2000064991A
公开(公告)日：2000-03-03
申请号：JP23811598
申请日：1998-08-25
申请人： HITACHI LTD
发明人： TAKADA YOSHIHIRO , HAKAMAYA NOBUSUKE , YOSHINAGA SHINYA , YOKOYAMA HIDENORI , MORIMOTO MOTOO , HAMADA SUSUMU , MURAYAMA MASAMI , TAKAKU SHOJI
IPC分类号： F04D29/38 , F04D29/66
摘要： PROBLEM TO BE SOLVED: To reduce the generation of noise, to improve strength, and to prevent the occurrence of unevenness in a vane mounting angle by a method wherein the maximum value of the chord length of a propeller fan being the electric fan of a heat-exchange part is positioned at the outer peripheral part of the fan and the fan6 outer peripheral part is protruded to the pressure surface side, and the outer peripheral part is moved backward to the negative pressure surface side. SOLUTION: A propeller fan 5 is formed that vanes 2 are disposed at a boss 1. In this case, since an outer peripheral protrusion part 3 protruding from a pressure surface at the tip of the vane 2 has a given curvature, the protrusion part is moved backward to a negative pressure surface after protrusion. The vane shape of a part wherein a fan outer peripheral end formed that it is moved backward to the negative pressure surface side at an outer peripheral part and a fan front edge cross each other is changed in a manner to protrude toward the pressure surface side. Further, a maximum outside diameter part is arranged further near the front edge side than the central part (, for example, 50% of a chord flare) of the vane. The outside diameter D21 is set to a value, for example, 3% or more higher than an outside diameter D23. This constitution increases an air volume without increasing the generation of noise.

56. 发明专利

JPH11248198A AIR BLOWING DEVICE 失效
公开(公告)号：JPH11248198A
公开(公告)日：1999-09-14
申请号：JP5309498
申请日：1998-03-05
申请人： HITACHI LTD
发明人： HAKAMAYA NOBUSUKE , TAKADA YOSHIHIRO
IPC分类号： F04D25/08 , F04D29/44 , F04D29/66 , F24F5/00
摘要： PROBLEM TO BE SOLVED: To prevent the leak flow at the outer peripheral end of a blade and contrive the increase of air volume by a method wherein the outer diameter of a propeller fan, superposed with a mouth ring in the axial direction of the same, is made larger than at least one maximum outer diameter of upstream or downstream side while the part of inner diameter of the mouth ring, corresponding to the part, is made larger than the maximum inner diameter in the upstream and downstream of the mouth ring. SOLUTION: The outdoor unit 1 of an air conditioner is provided with a heat exchanger 2 therein while air is passed through the heat exchanger 2 by the rotation of a propeller fan arranged in the downstream side of the heat exchanger whereby heat exchange is effected. In this case, a part 8, whereat the outer diameter 2D of the propeller fan 6 is increased locally, is formed at a part, whereat the trailing rim side of the propeller fan 6 is superposed axially with a mouth ring 5, while another part 7, whereat the inner diameter becomes larger locally than the inner diameter 2Db of the mouth ring 5, is formed at a part whereat the mouth ring 5 is superposed axially with the propeller fan 6. The diameters of the propeller fan 6 and the mouth ring 5 are changed locally in such a manner whereby a projected clearance S can be reduced and the amount of leakage can be reduced.

57. 发明专利

JPH11108403A AIR CLEANER 失效
公开(公告)号：JPH11108403A
公开(公告)日：1999-04-23
申请号：JP27079497
申请日：1997-10-03
申请人： HITACHI LTD , HITACHI TECHNO ENG
发明人： ISHIKAWA TOMINORI , TOYAMA YUJI , YOKOYAMA MAKOTO , TAKADA YOSHIHIRO , HONMA KEIICHI , KAWASAKI OSAMU , INOUE MASAYOSHI
IPC分类号： F24F7/00
摘要： PROBLEM TO BE SOLVED: To realize functions of saving energy and lowering poises in an air cleaner provided on the ceiling or the like of a clean room. SOLUTION: This air cleaner is provided with an impeller, a turbo fan having a motor 3 for rotating the impeller, a bell mouth 6 to supply air to a suction port of the turbo fan, a filter 5 to purify air blown out of the turbofan and a housing 1 having a pressurization chamber in which the air blown out of the turbo fan is pressurized to be guided to the filter. In this case, the turbo fan is housed into the housing and the motor is fixed while a motor base 4 having an opening part from which the air blown out of the impeller is sent to be supplied to the filter and a louver 7 arranged in proximity to the impeller are provided in the housing. The impeller is provided with vane-shaped blades while the number of the blades is set at four or less.

58. 发明专利

JPH1151412A INDOOR UNIT FOR AIR-CONDITIONER, AND ITS INDOOR HEAT EXCHANGER 失效
公开(公告)号：JPH1151412A
公开(公告)日：1999-02-26
申请号：JP20907197
申请日：1997-08-04
申请人： HITACHI LTD
发明人： KUDO MITSUO , NAKAMURA HIROO , TAKADA YOSHIHIRO , KOGURE HIROSHI , MORIMOTO MOTOO , OTSUKA ATSUSHI , MATSUBARA EISUKE
IPC分类号： F24F1/00
摘要： PROBLEM TO BE SOLVED: To prevent the heat exchange efficiency from being adversely affected even when the speed of the air flow passing through an indoor heat exchanger becomes different. SOLUTION: In an indoor unit for an air conditioner which is provided with an air inlet, an air outlet, a crossflow fan, and an indoor heat exchanger, leads the refrigerant from an outdoor unit to the indoor heat exchanger to exchange the heat with the air sucked indoors, and feeds the heat-exchanged air indoors from the outlet, heat transfer tubes 102 in which the refrigerant is circulated are arranged in a meandering manner in a core 150 where a large number of fins 100 are laminated, the core 150 is divided into >=2 blocks in the direction perpendicular to the direction of the air flow, and the heat transfer tubes 12 are connected thereto in a crossing manner at the middle and lower stages between a plurality of blocks. The refrigerant path is crossed between a plurality of blocks, and the heat exchange efficiency of the whole heat exchanger can be improved without adversely affecting the heat exchange efficiency of the whole indoor heat exchanger.

59. 发明专利

JPH10153341A AIR CONDITIONER 失效
公开(公告)号：JPH10153341A
公开(公告)日：1998-06-09
申请号：JP31036596
申请日：1996-11-21
申请人： HITACHI LTD
发明人： KUDO MITSUO , HATADA TOSHIO , NAKAMURA HIROO , WATABE YOSHITO , KOGURE HIROSHI , TAKAKU SHOJI , MORIMOTO YASUO , TAKADA YOSHIHIRO
IPC分类号： F24F13/30
摘要： PROBLEM TO BE SOLVED: To upgrade a suction air velocity by improving the layout structure of a heat exchanger and enhance the performance of an air conditioner with regard to an air conditioner indoor unit. SOLUTION: In an air conditioner provided with a heat exchanger unit which comprises a sub-heat exchanger 6 separately provided on the weather side of a rear surface heat exchanger 5B laid out between an air inlet 4B at the upper part of an indoor unit 20 and a reflux fan, the rear surface heat exchanger 5B and one end side of the sub-heat exchanger laid out on the weather side thereof are arranged to approach each other while the multi-end sides are separated from each other, thereby providing a V-shaped clearance surrounded by the rear surface heat exchanger 5B, the sub-heat exchanger 6 and a side wall 2A on the rear surface side of a casing.

60. 发明专利

JPH0829035A FORCED AIR COOLING DEVICE 失效
公开(公告)号：JPH0829035A
公开(公告)日：1996-02-02
申请号：JP16504794
申请日：1994-07-18
申请人： HITACHI LTD
发明人： HAYASHI ISATAKA , MIYAMOTO MITSUO , WATARAI YOSHIHITO , SHIN TAKAYUKI , TANAKA TETSUYA , HATADA TOSHIO , TAKADA YOSHIHIRO , OGURO TAKAHIRO
IPC分类号： F25D1/00 , C04B28/18 , F04D29/42 , H05K7/20
摘要： PURPOSE:To prevent an eddy air flow from being produced and improve the cooling efficiency by a method wherein a flow regulating plate crossing at a right angle with an air suction plane is mounted just before the air suction plate. CONSTITUTION:A table 2 is fixed to a frame 1. Many electronic circuit devices 8 are loaded on the table 2. A flat plate flow regulating plate 10 is mounted in such a manner that it may be crossed at a right angle just before the suction plane of a blower 6 so as to prevent air sucked into a side surface of a vane wheel 7 from becoming an eddy air flow. With such an arrangement as mentioned above, the cooling capability obtained from the blower 6 is made most appropriate one. Even if a sufficient distance (1) is not kept between the air sucking plane of the blower 6 and a wall surface 5, the electronic circuit device 8 can be efficiently cooled. In addition, if an improved efficiency of the blower 6 caused by mounting of the flow regulating plate 10 and an increased amount of pressure loss caused by a shortage of the distance (1) are properly balanced, a width of the blower 6 and a width of the table 2 can be reduced without cooling the electronic circuit device 8 having a larger amount of heating with the blower 6 of the same size or reducing a cooling capability and then the electronic device can be miniaturized.

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