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61. 发明专利

JPH11223365A AIR CONDITIONER 失效
公开(公告)号：JPH11223365A
公开(公告)日：1999-08-17
申请号：JP2558798
申请日：1998-02-06
申请人： HITACHI LTD
发明人： FUNABASHI SHIGEHISA , OKI KATSUO , OTAGURO TOSHIO , SHIMOIDE SHINICHI , KISHITANI TETSUSHI , SATO RYOJI , NAGAI MAKOTO , YAMADA SHINICHIRO , TAKENAKA HIROSHI
IPC分类号： F24F5/00
摘要： PROBLEM TO BE SOLVED: To provide an air conditioner to be formed in a compact manner and reduce the generation of noise. SOLUTION: One or more propeller fans 1 each having a suction pipe 2 are provided and heat exchangers 3 are arranged in one or more directions of a side situated upper stream from the propeller fan 1, and an electric box 4 having a flow of cooling air is arranged at the internal part of the opposite side of the heat-exchanger 3. In the outside machine of a so formed air conditioner, provided the outside diameter of the propeller fan 1 is D2, and a distance between the tip of the propeller fan 1 and the upper surface of the electric box 4 is (h), arrangement is effected such that a formula of 0.3 less than or equal to h/D2 less than or equal to 0.8 is satisfied.

62. 发明专利

JPH11223362A AIR CONDITIONER AND OUTDOOR UNIT USED THEREIN 失效
公开(公告)号：JPH11223362A
公开(公告)日：1999-08-17
申请号：JP2419198
申请日：1998-02-05
申请人： HITACHI LTD
发明人： TAKENAKA HIROSHI , YAMADA SHINICHIRO , NAKAMURA KENICHI , SATO RYOJI
IPC分类号： F04D29/00 , F04D25/08 , F04D29/38 , F24F5/00
摘要： PROBLEM TO BE SOLVED: To provide an air conditioner, reducing an arrangement space for arrangement of an outdoor unit and suitable for the environment, in particular reduction in noises. SOLUTION: An air conditioner comprises a fan for air supply wherein a ratio of the outermost peripheral size of a single blade to a value obtained by dividing the outermost peripheral size of the fan for air supply by the number of blades is 0.8 or more, a bell mouth 11 arranged at the outer periphery of the fan for air supply and formed in a cylindrical shape, and formed in a shape in which an inside diameter is increased in the radial direction at a part in the peripheral direction of a periphery, and a fan guard 12 having an outline formed in a loop-form shape and a plurality of loop wires having different diameters, and having a maximum outline approximately equal to the inside diameter of the bell mouth 11, and formed in a manner to cover the opening part of the bell mouth 11.

63. 发明专利

JPH11201506A OUTDOOR MACHINE FOR AIR CONDITIONER 失效
公开(公告)号：JPH11201506A
公开(公告)日：1999-07-30
申请号：JP714698
申请日：1998-01-19
申请人： HITACHI LTD
发明人： SHIMOIDE SHINICHI , OTAGURO TOSHIO , FUNABASHI SHIGEHISA , SHIKAZONO NAOKI , TSUKADA FUKUJI , SATO RYOJI , KISHITANI TETSUSHI , NAGAI MAKOTO , TAKENAKA HIROSHI , MATSUSHITA ISAO
IPC分类号： F24F5/00
摘要： PROBLEM TO BE SOLVED: To make compact and silent an outdoor machine for an air conditioner which uses the air blowing-out surface of an axial fan installed to the upper section of an enclosure as its upper surface by providing a corner guide to at least one of the void sections in the corner sections formed of the front-face plate, roof plate, and one side-face plate which is adjacent to the front-face plate. SOLUTION: A top-flow type outdoor machine 1 is provided with air supplying openings on its side-face sides and a heat exchanger 8 on its back side. The machine 1 is also provided with a compressor 9, an accumulator 10, an axial fan, a bell mouth 12, etc., and a heat-exchanged wind exhausted front the fan 11 is discharged upward after passing through an exhaust pipe 7 and a guard net 16. In the machine 1, a corner guide 18a is provided to the void of each corner section formed of the front-face plate 2, side-face plate, roof plate 6, and bell mouth of the machine 1. Therefore, the outdoor machine 1 can be operated silently, because the heat-exchanged wind sucked from the heat exchanger 8 is prevented front staying in the voids of the corner sections and, at the same time, the efficiency deterioration of the fan 11 caused by uneven flows in the circumferential direction can be suppressed.

64. 发明专利

JPH10318190A FAN FOR AIR CONDITIONER 失效
公开(公告)号：JPH10318190A
公开(公告)日：1998-12-02
申请号：JP13070997
申请日：1997-05-21
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： KOHAMA SHIZUO , NAGAI MAKOTO , SARUTA AKIRA , SATO RYOJI , MOCHIZUKI YOSHIHIKO , MOCHIZUKI MASAAKI , MORI YUTAKA , YONEYAMA HIROYASU , TSUKADA FUKUJI
IPC分类号： F04D17/04 , F04D29/30 , F04D29/34
摘要： PROBLEM TO BE SOLVED: To reduce a fluid noise of a fan and an electromagnetic vibration noise generated from a fan driving motor as exciting source, and improve reliability, by placing a plurality of openings on torque transferring parts from a boss part of the fan to a blade to provide a spring effect. SOLUTION: By placing openings 1b on torque transferring parts from a boss part of a fan to a blade, a cross section of torque transferring parts 1c between adjacent openings 1b is decreased and its spring effect is increased. By increasing the spring effect, a blade of the fan is separated from the fan boss part to which a damping member 3 is fixed. A vibration system with three masses and two torsion springs consists of a rotor and a rotational shaft of a motor, vibration mode changes, and vibration in the direction of rotation of the motor can be absorbed with the damping member 3. The vibration of the blade of the fan so sounding body can be reduced, the vibration of the rotor of the motor also decreases, and electromagnetic exciting force can be reduced.

65. 发明专利

JPH1037895A AIR-CONDITIONING FAN 失效
公开(公告)号：JPH1037895A
公开(公告)日：1998-02-13
申请号：JP19598096
申请日：1996-07-25
申请人： HITACHI LTD , HITACHI SHIMIZU ENG KK
发明人： SATO RYOJI , NAGAI MAKOTO , MOCHIZUKI YOSHIHIKO , YONEYAMA HIROYASU , WATANABE MASATOSHI , TSUKADA FUKUJI
IPC分类号： F04D29/38
摘要： PROBLEM TO BE SOLVED: To control any possible vibration in making the boundary-layer control of flow separation achievable by installing a lot of small holes in plural sheets of blade surface members constituting a fan in a sense of being perpendicular and oblique with a blade surface, and providing a different king member in a hollow layer in the inner part of a blade. SOLUTION: Many small holes 5 are installed in a suction surface 6 and a pressure surface 7 in place nearer to a rear edge 3 of a fan 1. The inner part of a spatial layer held between both these blade surfaces 6 and 7 is composed of an integrally formed different kind member. A flow 8 taken into the fan 1 from a front edge 2 of a blade flow into the small holes 5, producing small vortexes there. These vortexes produced in the small holes 5 are discharged to the outside air form the small holes 5 after having receiving a pressure interference on the surface of the different kind member 4 in the spatial layer. The vortexes discharged to the outside air become lessened of a pressure variation in the blade surface in order to become such a vortex as preventing it from being separated form these surfaces 6 and 7. Therefore it turns to a vibration absorbent by installing the different kind member 4 in the spatial layer being held between these surfaces 6 and 7. Thus, a reduction in fluid noises is made possible, and thus the vibro-noise being generated out of the fan is reducible.

66. 发明专利

JPH06317295A AXIAL FAN 失效
公开(公告)号：JPH06317295A
公开(公告)日：1994-11-15
申请号：JP10839993
申请日：1993-05-10
申请人： HITACHI LTD
发明人： SATO RYOJI , OKAMOTO JOJI , KURODA SHIGEAKI , NAGAI MAKOTO , YONEYAMA HIROYASU , SAKUMA KOJI , IZUSHI MINETOSHI , SHIMOIDE SHINICHI , WATANABE MASATOSHI
IPC分类号： F04D29/32 , F04D29/66
摘要： PURPOSE:To set a lift coefficient at the optimal value by setting the whole blade area of blades so that the whole blade area in the number where the number of sample blades is reduced more than the reference number can be put in the specific relationship to the whole blade area of the reference number in a blade and a boss having the same diameter. CONSTITUTION:In a blade and a boss having the same diameter, the whole blade area A2 of blades, that is, the number of blades is set so that the whole blade area A2 in the number N2 where the number of sample blades is reduced more than the reference number N1 becomes [A2

67. 发明专利

JPH0626738A AIR CONDITIONING APPARATUS 失效
公开(公告)号：JPH0626738A
公开(公告)日：1994-02-04
申请号：JP18070892
申请日：1992-07-08
申请人： HITACHI LTD
发明人： SATO RYOJI , KATSUMATA NAOTO , SHIMOIDE SHINICHI , UMEDA TOMOMI
IPC分类号： F25B41/00
摘要： PURPOSE:To reduce the generation of refrigerant noise and vibration noise during the passage of the refrigerant by providing a refrigerant flow form control pipe having a suction pipe and a delivery pipe arranged on the high pressure side of an expansion valve and providing a in the middle of the control pipe with porous plate having a plurality of refrigerant flow holes. CONSTITUTION:A refrigerant flow form control pipe 13 is arranged as nearer the expansion valve 5 side as possible in a piping 8 for interconnecting an expansion valve 5 and a condenser 3. The mechanism of the refrigerant flow form control pipe 13 comprises a suction pipe 15 and a delivery pipe 19, expanded and contracted at a constant angle being below 10 deg. at which a flow does not peel, and a porous plate 18 located therebetween and having a plurality of refrigerant flow holes 17 having an area equal to the line sectional areas of a refrigerant piping 8 on the condenser 3 side and a refrigerant piping 20 on the expansion valve 5 side. By damping energy in a way that air bubbles flowing to the orifice of the expansion valve 5 are previously separated into fine pieces, the generation of refrigerant noise during the generation of a slug flow where the flow of a refrigerant is formed in the shape of a cannonball is reduced and the generation of noise on the low frequency side owing to collision with the expansion valve 5 can be reduced.

68. 发明专利

JPH05231706A ACTIVE SILENCER FOR THREE-DIMENSIONAL SPACE 失效
公开(公告)号：JPH05231706A
公开(公告)日：1993-09-07
申请号：JP3202992
申请日：1992-02-19
申请人： HITACHI LTD
发明人： OKABE SHINYA , SHIMOIDE SHINICHI , SATO RYOJI , HANADA MASAMICHI , CHIAKI TAKAO
IPC分类号： F24F13/06 , F24F13/20 , G01H3/00 , G10K11/16 , G10K11/178
摘要： PURPOSE:To silence wide-band noises actively by emitting a sound wave having the same sound pressure, wavelength and directivity in antiphase to noises in a wide frequency band on the basis of the output signals of a noise detecting means and a sound-arresting effect detecting means in the title device of an air conditioner, etc. CONSTITUTION:In a ceiling installation type air conditioner, sounding means 2a-2c and sound-arresting effect detecting means 3a-3c are disposed onto a suction grill 8 with an air filter 7. The mutual spaces of the sounding means 2a-2c and a space from the turbo-fan 6 of a noise source are made shorter than the half of the wavelength of maximum frequency in the frequency of noises to be arrested, and the noise source 6 is arranged so as to be surrounded at that time. Fixed filters 51-53 are interposed among each sound-arresting effect detecting means 3a-3c and the sounding means 2a-2c and a controller 4 and between the controller 4 and a signal processing circuit respectively. A sound wave having antiphase to noises and the same sound pressure, wavelength and directivity is emitted from the sounding means 2a-2c, and noises in the wide bands of low or high frequency sounds can be silenced.

69. 发明专利

JPH0526540A AIR-CONDITIONER 失效
公开(公告)号：JPH0526540A
公开(公告)日：1993-02-02
申请号：JP18075991
申请日：1991-07-22
申请人： HITACHI LTD
发明人： UMEDA TOMOMI , FUKUSHIMA TOSHIHIKO , NAKAMURA SHOZO , SATO RYOJI
IPC分类号： F25B41/00
摘要： PURPOSE:To reduce the generation of refrigerant fluid noise in pipings before and after an expansion valve and the generation of vibration of a piping owing to the flow of a refrigerant by a method wherein a piping the sectional area of which is increased and which has a fixed shape is located on a horizontal piping between a condenser and the expansion valve. CONSTITUTION:An air-conditioner comprises a compressor 1, a condenser 2, a piping 3 the sectional area of which is increased and which has a fixed shape, an expansion valve 4, a vaporizer 5, and a piping 6 for interconnecting the above devices. The piping 3 the sectional area of which is increased and which has a fixed shape is installed on a horizontal piping between the condenser 2 and the expansion valve 4 arranged such that the direction of an inlet passage crosses a power direction at right angles. Since combination of air bubble lumps can be promoted, a gas phase and a liquid phase are migrated in a short horizontal piping to a horizontal flow where the two phases are continued to each other and can flow in the expansion valve, this constitution prevents closing of the throttle of the expansion valve with an air foam lump, resulting in the possibility to reduce the generation of refrigerant fluid noise.

70. 发明专利

JPH04203750A AIR-CONDITIONER AND MANUFACTURE THEREOF 失效
公开(公告)号：JPH04203750A
公开(公告)日：1992-07-24
申请号：JP32926290
申请日：1990-11-30
申请人： HITACHI LTD
发明人： OKABE SHINYA , SHIMOIDE SHINICHI , SATO RYOJI , HANADA MASAMICHI
IPC分类号： F24F13/15
摘要： PURPOSE:To improve the directional properties of the flow of fluid by a method wherein at least one louver is formed of a resilient material being changeable of the flow direction and the velocity of flow of fluid through expansion and contraction operation of a thread. CONSTITUTION:Louvers 4 and 5 formed of a resilient substance are fixed to a fixed shaft 6 and the direction of the flow of fluid is changeable through deformation of a louver through pull or slackening of a thread 8 attached to the lower parts of the louvers 4 and 5. Arms 11 and 12 connected to an electric motor 9 transmit operation to run the electric motor 9 to an X-arm 10. Since the X-arm 10 is rotated, the rotation is changed into operation to pull and restore the thread 8 by a distance between the center of the X-arm 10 and the end of the X-arm 10, whereby no malfunction occurs. Since the louver formed of a resilient substance has a strong and a weak part, the louver formed of a resilient substance deformed through operation to pull and restore the thread is formed in a shape where incurring of a pressure loss is uniformly reduced to a lowmost value. This constitution and method enable fluid to produce a flow the direction and the velocity of flow of which are kept at a target value, reduces incurring of a pressure loss, and decreases the generation of noise.

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