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    • 7. 发明申请
    • LIQUID DELIVERY DEVIDE AND LIQUID CHROMATOGRAPHY DEVICE
    • 液体输送和液相色谱装置
    • US20120055581A1
    • 2012-03-08
    • US13319111
    • 2010-05-24
    • Daisuke AkiedaKisaburo DeguchiHironori Kaji
    • Daisuke AkiedaKisaburo DeguchiHironori Kaji
    • B65B1/04B01D15/08
    • G01N30/32G01N2030/326
    • In a liquid delivery device, when an inlet-side check valve and an outlet-side check valve of a first cylinder are both closed, and compression of an eluent inside the first cylinder is started by means of a first plunger inside the first cylinder, a control unit doubles the rotational speed of a step motor, and measures the amount of change in the pressure inside the first cylinder which changes for a prescribed time by means of a first cylinder internal pressure detector. The time elapsed until the pressure inside the first cylinder is the same as the pressure inside a discharge-side flow passage is predicted using the rate of change over time of the pressure of the eluent. When the predicted elapsed time has elapsed, the rotational speed of the step motor is returned to the original speed, and the compression of the eluent inside the first cylinder is completed.
    • 在液体输送装置中,当第一气缸的入口侧止回阀和出口侧止回阀都被关闭时,借助于第一气缸内的第一柱塞开始第一气缸内的洗脱液的压缩, 控制单元使步进电机的转速加倍,并且通过第一气缸内压检测器来测量第一气缸内的压力变化达规定时间的变化量。 使用洗脱液的压力随时间的变化率预测在第一气缸内的压力与放电侧流路内的压力相同的时间。 当预测经过时间过去时,步进电机的转速恢复到原来的速度,并且完成了第一气缸内的洗脱液的压缩。
    • 8. 发明申请
    • LIQUID MIXING DEVICE AND LIQUID CHROMATOGRAPH
    • 液体混合装置和液相色谱
    • US20130091933A1
    • 2013-04-18
    • US13704247
    • 2011-05-18
    • Nobuhiro TsukadaYoshihiro NagaokaHironori KajiDaisuke Akieda
    • Nobuhiro TsukadaYoshihiro NagaokaHironori KajiDaisuke Akieda
    • G01N30/02
    • G01N30/02B01F5/0646G01N30/34
    • A liquid mixing device that decreases a concentration non-uniformity in the flow direction of a mobile phase and a liquid chromatograph that uses the liquid mixing device are provided. The liquid mixing device is configured to include a flow channel unit that is made from an introduction channel, a branch portion that is positioned in a downstream of the introduction channel, multiple branched flow channels that branch from the branch portion, a junction portion in which the multiple branched flow channels join together, and a discharge channel of the downstream of the junction portion. The multiple branched flow channels are different in terms of any one of, or several of width, depth, and length that are associated with an external shape, and a structure filling the inside of the flow channel and thus the times for the liquid to pass through the branched flow channels are different from each other.
    • 提供了降低流动相的流动方向的浓度不均匀性和使用液体混合装置的液相色谱仪的液体混合装置。 液体混合装置被构造成包括由引入通道制成的流动通道单元,位于引入通道下游的分支部分,从分支部分分支的多个分支流动通道,其中连接部分 多个分支流动通道连接在一起,以及连接部分下游的排出通道。 多个分支流动通道在与外部形状相关联的宽度,深度和长度中的任何一个或几个方面是不同的,以及填充流动通道内部的结构,因此液体通过的时间 通过分支流动通道彼此不同。
    • 9. 发明授权
    • Liquid mixing device and liquid chromatograph
    • 液体混合装置和液相色谱仪
    • US09128071B2
    • 2015-09-08
    • US13704247
    • 2011-05-18
    • Nobuhiro TsukadaYoshihiro NagaokaHironori KajiDaisuke Akieda
    • Nobuhiro TsukadaYoshihiro NagaokaHironori KajiDaisuke Akieda
    • G01N30/02B01F5/06G01N30/34
    • G01N30/02B01F5/0646G01N30/34
    • A liquid mixing device that decreases a concentration non-uniformity in the flow direction of a mobile phase and a liquid chromatograph that uses the liquid mixing device are provided. The liquid mixing device is configured to include a flow channel unit that is made from an introduction channel, a branch portion that is positioned in a downstream of the introduction channel, multiple branched flow channels that branch from the branch portion, a junction portion in which the multiple branched flow channels join together, and a discharge channel of the downstream of the junction portion. The multiple branched flow channels are different in terms of any one of, or several of width, depth, and length that are associated with an external shape, and a structure filling the inside of the flow channel and thus the times for the liquid to pass through the branched flow channels are different from each other.
    • 提供了降低流动相的流动方向的浓度不均匀性和使用液体混合装置的液相色谱仪的液体混合装置。 液体混合装置被构造成包括由引入通道制成的流动通道单元,位于引入通道下游的分支部分,从分支部分分支的多个分支流动通道,其中连接部分 多个分支流动通道连接在一起,以及连接部分下游的排出通道。 多个分支流动通道在与外部形状相关联的宽度,深度和长度中的任何一个或几个方面是不同的,以及填充流动通道内部的结构,因此液体通过的时间 通过分支流动通道彼此不同。
    • 10. 发明申请
    • Pump for liquid chromatography
    • 泵用于液相色谱
    • US20050023205A1
    • 2005-02-03
    • US10902028
    • 2004-07-30
    • Kenji HirakuKunihiko TakaoHironori KajiMasahito Ito
    • Kenji HirakuKunihiko TakaoHironori KajiMasahito Ito
    • G01N30/32B01D15/08B01D15/14F04B1/02F04B11/00F04B13/02F04B23/06F04B53/06
    • F04B11/0058B01D15/14F04B11/0083F04B13/02F04B53/06F04B2205/09G01N2030/326
    • The invention provides a pump for liquid chromatography excellent in feeding liquid stably at an extremely low flow rate with high accuracy and in discharging bubbles at startup. At startup, a first plunger feeds solvent at a large flow rate to discharge bubbles in a pump and to fill the solvent into the pump in a short time and in a normal operation, the first plunger is stopped and the second plunger is pushed into a second pressure chamber at a low speed to feed the solvent at a low flow rate. When the second plunger reaches full stroke, the second plunger is pulled back at a high speed and at the same time the first plunger is pushed into a first pressure chamber in synchronization with the pullback of the second plunger to control the flow rate passing a discharge passage to a constant value at all times by a controller. Further, while the second plunger feeds the solvent, the first plunger is slightly pushed into the first pressure chamber to keep pressure in the first pressure chamber at pressure equal to or less than pressure in the second pressure chamber.
    • 本发明提供了一种液体色谱泵,其具有以极高的精度稳定地以极低的流量供给液体并在起动时排出气泡的液体色谱。 在启动时,第一柱塞以大流量供给溶剂以排出泵中的气泡并在短时间内和正常操作中将溶剂填充到泵中,使第一柱塞停止,将第二柱塞推入 第二压力室以低速进料以低流量进料溶剂。 当第二柱塞达到全行程时,第二柱塞被高速拉回,同时第一柱塞与第二柱塞的回退同步地被推入第一压力室,以控制通过排放的流量 任何时候都由控制器传递给恒定值。 此外,当第二柱塞进料溶剂时,第一柱塞稍微推入第一压力室,以将第一压力室中的压力保持在第二压力室中等于或小于压力的压力。