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公开(公告)号：DE69116244D1
公开(公告)日：1996-02-22
申请号：DE69116244
申请日：1991-06-25
Applicant: EBARA CORP
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公开(公告)号：DE68921561T2
公开(公告)日：1995-07-27
申请号：DE68921561
申请日：1989-12-05
Applicant: EBARA CORP
Inventor： YANAGISAWA KIYOSHI , MAEDA MITSURU , MARUTA YOSHIYUKI , SASE TOSHITSUGU
Abstract: The present invention provides a screw compressor having a wide operating range with respect to flow rate and pressure ratio, wherein a discharge opening portion (9) of a casing (7) is provided with a generally taperingly-cut notch portion (8) so that compressed gas is gradually discharged from a certain fixed point where a volume ratio of one groove defined by rotors (6, 6') and the casing (7) is smaller than an inherent built-in volume ratio. Since the present invention is arranged in the above-mentioned manner, rapid flow of the gas at the discharge opening portion is reduced by means of the notch portion (8) of the discharge opening portion (9) which is readily formed, whereby the variation range of the pressure (the amplitude of pulsation of the pressure) is decreased and the noise level is lowered. Further, a loss of pressure resulting from the rapid flow of the gas is restricted to thereby widen a range of preferable performance of the compressor.
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公开(公告)号：DE68921561D1
公开(公告)日：1995-04-13
申请号：DE68921561
申请日：1989-12-05
Applicant: EBARA CORP
Inventor： YANAGISAWA KIYOSHI , MAEDA MITSURU , MARUTA YOSHIYUKI , SASE TOSHITSUGU
Abstract: The present invention provides a screw compressor having a wide operating range with respect to flow rate and pressure ratio, wherein a discharge opening portion (9) of a casing (7) is provided with a generally taperingly-cut notch portion (8) so that compressed gas is gradually discharged from a certain fixed point where a volume ratio of one groove defined by rotors (6, 6') and the casing (7) is smaller than an inherent built-in volume ratio. Since the present invention is arranged in the above-mentioned manner, rapid flow of the gas at the discharge opening portion is reduced by means of the notch portion (8) of the discharge opening portion (9) which is readily formed, whereby the variation range of the pressure (the amplitude of pulsation of the pressure) is decreased and the noise level is lowered. Further, a loss of pressure resulting from the rapid flow of the gas is restricted to thereby widen a range of preferable performance of the compressor.
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公开(公告)号：DE69116244T2
公开(公告)日：1996-07-04
申请号：DE69116244
申请日：1991-06-25
Applicant: EBARA CORP
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公开(公告)号：ES2072285T3
公开(公告)日：1995-07-16
申请号：ES89122389
申请日：1989-12-05
Applicant: EBARA CORP
Inventor： YANAGISAWA KIYOSHI , MAEDA MITSURU , MARUTA YOSHIYUKI , SASE TOSHITSUGU
Abstract: The present invention provides a screw compressor having a wide operating range with respect to flow rate and pressure ratio, wherein a discharge opening portion (9) of a casing (7) is provided with a generally taperingly-cut notch portion (8) so that compressed gas is gradually discharged from a certain fixed point where a volume ratio of one groove defined by rotors (6, 6') and the casing (7) is smaller than an inherent built-in volume ratio. Since the present invention is arranged in the above-mentioned manner, rapid flow of the gas at the discharge opening portion is reduced by means of the notch portion (8) of the discharge opening portion (9) which is readily formed, whereby the variation range of the pressure (the amplitude of pulsation of the pressure) is decreased and the noise level is lowered. Further, a loss of pressure resulting from the rapid flow of the gas is restricted to thereby widen a range of preferable performance of the compressor.
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Patent Agency Ranking
公开(公告)号：JPH0926793A
公开(公告)日：1997-01-28
申请号：JP19917095
申请日：1995-07-12
Applicant: EBARA CORP
Inventor： ABE MASATO , NEMOTO YOSHIAKI , MARUTA YOSHIYUKI , MINORIKAWA MANABU
Abstract: PROBLEM TO BE SOLVED: To provide an active silencing device which can silence a three- dimensional space with a single sound source without specifying the frequency and direction. SOLUTION: A monopole sound source is composed of a speaker 6 and an external noise detecting microphone 2 which is opposed to the speaker. This source is controlled by a control system in which the system is approximated by a first-order time lag system in a minute frequency band by limiting the frequency range.
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公开(公告)号：JPH08247504A
公开(公告)日：1996-09-27
申请号：JP7726895
申请日：1995-03-08
Applicant: EBARA CORP
Inventor： YATSUHASHI HAJIME , INOUE OSAYUKI , SUZUKI AKIYOSHI , KAWANISHI TAKU , MARUTA YOSHIYUKI
Abstract: PURPOSE: To obtain an air heat exchanger making it possible to reduce noise and also to cope with an increase in an air loss of a heat exchange part. CONSTITUTION: In a heat exchanger having a large number of fins and exchanging heat with air, a casing 1 enclosing a heat exchange part 3 so as to make the air flow into an intake part of a blower from the atmosphere through the heat exchange part 3 is provided, and the blower 4 taking in the air and sending it with pressure to the downstream side of the heat exchange part 3 is equipped with an impeller 6 which sends out the air outward from a rotating shaft 4a of the blower as the center.
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公开(公告)号：JP2010201400A
公开(公告)日：2010-09-16
申请号：JP2009052774
申请日：2009-03-06
Applicant: Ebara Corp , 株式会社荏原製作所
Inventor： GOTO MASANORI , ISHII MASAHARU , CHO REIKA , MARUTA YOSHIYUKI
CPC classification number: Y02W10/15
Abstract: PROBLEM TO BE SOLVED: To generate a large amount of fine bubbles having a diameter of about ≤100 μm, preferably of ≤60 μm without adding a chemical agent such as a surfactant with significantly reduced power, and to easily manufacture. SOLUTION: A gas diffuser 12 includes a gas chamber 16, a gas inflow pipe 18 for allowing a gas to flow into the gas chamber 16, and a gas diffusion part 24 for allowing the inflow gas to flow out of the gas chamber 16 into an external flowing liquid while being diffused as bubbles. The gas diffusion part 24 is provided with a plurality of gas diffusion pipes 28 each projecting outward from the plane surface of the gas diffusion part and having a gas diffusion hole 28a axially penetrating therethrough in the inside thereof. The projection length L of the gas diffusion pipe 28 from the surface of the gas diffusion part to the end thereof is ≥0.5 mm and ≤1.5 mm. COPYRIGHT: (C)2010,JPO&INPIT
Abstract translation: 要解决的问题：为了产生大量直径约≤100μm，优选≤60μm的微小气泡，而不添加具有显着降低功率的表面活性剂等化学试剂，并且易于制造。 解决方案：气体扩散器12包括气体室16，用于允许气体流入气体室16的气体流入管18和用于允许流入气体从气体室流出的气体扩散部24 16成为外部流动的液体，同时作为气泡扩散。 气体扩散部24设置有从气体扩散部的平面向外侧突出的多个气体扩散管28，并且具有在其内部轴向贯通的气体扩散孔28a。 气体扩散管28从气体扩散部的表面到其端部的突出长度L为≥0.5mm，≤1.5mm。 版权所有（C）2010，JPO＆INPIT
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公开(公告)号：JPH07293939A
公开(公告)日：1995-11-10
申请号：JP11020994
申请日：1994-04-27
Applicant: EBARA CORP
Inventor： FUJII TOSHIAKI , HARADA HIDEOMI , MIYA AKIKO , MARUTA YOSHIYUKI , NOMICHI SHINJI
Abstract: PURPOSE:To obtain a comfortable air producer enabling effective attainment of comfortable air according with a purpose, and a comfortable dwelling using the same. CONSTITUTION:In a comfortable air producer 10 for creating a comfortable space in a dwelling, a particle collecting device A which uses a filter for making the concentration of particles (of a particle size 0.1mum or above) in air be 10000000pcs./ft or below and/or photoelectrons 15, 16, 17 and 18 and a negative ion generating device B which uses photoelectrons generated by application 20 of ultraviolet rays to a photoelectron emitting material 19 passing the air wherefrom the particles are removed, are provided. Moreover, a deodorizing filter or an aroma producer may also be used Jointly.
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公开(公告)号：JPH0460210A
公开(公告)日：1992-02-26
申请号：JP17066490
申请日：1990-06-27
Applicant: EBARA CORP
Inventor： KATAOKA TADASHI , MIMURA SHUNSUKE , KANEMITSU YOICHI , MARUTA YOSHIYUKI , HIUGA TATSUO , SUZUKI MAMORU , TOSHIMITSU MANABU , AIYOSHIZAWA SHIYUNICHI
Abstract: PURPOSE:To smoothly start and stop a bearing by superposing a piezoelectric element on a fixed side bearing member, applying high frequency voltage to the piezoelectric element to oscillate it, and thereby reducing frictional resistance at the time of starting and stopping. CONSTITUTION:High-frequency oscillations are applied to a stator 2 by exerting ac voltage on a piezoelectric element 6 arranged on a lower part of the stator 2. This high-frequency oscillations are applied only at the time of starting and stopping of a motor 5. In case that the oscillations are performed with a resonance frequency of a stator side bearing plate 4a, the oscillations have a plurality of nodes and loops. The stator side bearing plate 4a is in contact to a rotor side bearing plate 4b at the loops of the oscillations. As for the rotor 1, it nearly stops at a maximum portion of oscillation amplitude by inertia. Since the oscillation has high frequency, the bearing plate 4a is in contact to the bearing plate 4b instantaneously. Air film by squeezing effect may be formed. The bearing plate 4a is hardly in contact to the bearing plate 4b, so that the frictional resistance is remarkably reduced.
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