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    • 27. 发明申请
    • Preparation method of metal nano particle using micro mixer
    • 使用微型混合器制备金属纳米颗粒的方法
    • US20080245184A1
    • 2008-10-09
    • US11812072
    • 2007-06-14
    • Woo Ram LeeJae Hoon ChoeJung Hyun SeoYoo Seok Kim
    • Woo Ram LeeJae Hoon ChoeJung Hyun SeoYoo Seok Kim
    • B22F9/16B01J19/24B22F9/24
    • B22F9/24B01F5/0602B01F13/0059B22F1/0018B82Y30/00
    • Disclosed is a method for preparing metal nanoparticles, the method comprising the steps of: providing a solution of metal salt and a solution of a strong reducing agent with a standard reduction potential of −0.23V or lower; and mixing the solutions by using a micro mixer without supplying additional heat energy from the exterior, while carrying out reduction of the metal. Metal nanoparticles obtained by the above method, and a micro mixer for preparing the metal nanoparticles are also disclosed. The method for preparing metal nanoparticles via the reduction of metal ions in a solution uses a strong reducing agent and a micro mixer. Therefore, it is possible to obtain metal nanoparticles having a particle size of 20 nm or more and a uniform shape and dimension without supplying additional heat energy from the exterior. Additionally, the method is amenable to a continuous process, and thus ensures cost-efficiency and stable product quality required for mass production.
    • 公开了一种制备金属纳米颗粒的方法,该方法包括以下步骤:提供金属盐溶液和浓度为-0.23V或更低的标准还原电位的强还原剂溶液; 并且通过使用微型混合器混合溶液而不从外部提供额外的热能,同时进行金属的还原。 还公开了通过上述方法获得的金属纳米颗粒和用于制备金属纳米颗粒的微型混合器。 通过在溶液中还原金属离子制备金属纳米颗粒的方法使用强还原剂和微混合器。 因此,可以获得粒径为20nm以上且均匀的形状和尺寸的金属纳米粒子,而不从外部提供额外的热能。 此外,该方法适用于连续工艺,从而确保大规模生产所需的成本效益和稳定的产品质量。
    • 29. 发明申请
    • VENTILATING APPARATUS, HEAT EXCHANGE APPARATUS, HEAT EXCHANGE ELEMENT, AND RIB THEREFOR
    • 通风设备,热交换器,热交换器元件及其制造
    • US20080156469A1
    • 2008-07-03
    • US11853132
    • 2007-09-11
    • Woo Ram LEESung Won HanHan Lim Choi
    • Woo Ram LEESung Won HanHan Lim Choi
    • F28F3/12
    • F28D9/0062F28F3/048F28F13/12F28F13/185F28F2250/108
    • A ventilating apparatus, a heat exchange apparatus, a heat exchange element, and a rib therefor are provided. The heat exchange element includes a plurality of heat exchange sheets which are multi-stacked, and a plurality of ribs arranged between the heat exchange sheets to form ducts with the heat exchange sheets. Each of the plurality of ribs includes an irregular structural surface including an uneven portion. The uneven portion may include a recess portion, a protrusion portion, or a combination of a recess portion and a protrusion portion, which generates a turbulent flow in a heat exchange gas flowing through the duct. Such heat exchange element having such a rib may minimize duct resistance by suppressing a laminar flow and growth of a boundary layer in airflow of outdoor and indoor air passing through a heat exchanger, and may further increase heat exchange efficiency because the heat exchange gas may be introduced/exhausted smoothly at a low flow velocity.
    • 提供通风装置,热交换装置,热交换元件及其肋。 热交换元件包括多层叠的热交换片,以及设置在热交换片之间的多个肋,以形成具有热交换片的管道。 所述多个肋中的每一个包括包括不平坦部分的不规则结构表面。 不平坦部分可以包括凹陷部分,突出部分或凹部和突出部分的组合,其在流过管道的热交换气体中产生湍流。 具有这种肋的这种热交换元件可以通过抑制通过热交换器的室外和室内空气的气流中的层流和边界层的生长而使管道阻力最小化,并且由于热交换气体可能会进一步增加热交换效率 以低流速平稳地引入/排出。