公开(公告)号：US20180207632A1

公开(公告)日：2018-07-26

申请号：US15745177

申请日：2016-04-14

Applicant: Korea Aerospace Research Institute

Inventor： Hyok Jin CHO ,  Hee Jun SEO ,  Sung Wook PARK ,  Guee Won MOON

IPC: B01L1/02 ,  B01J20/20 ,  B01J20/04 ,  B01J20/02 ,  G01L13/00 ,  F04B37/04

CPC classification number: B01L1/02 ,  B01J20/0211 ,  B01J20/0292 ,  B01J20/04 ,  B01J20/20 ,  B01L2200/146 ,  B01L2200/147 ,  B01L2300/14 ,  B01L2300/1805 ,  F04B37/04 ,  G01L13/00

Abstract: Provided is a method for maintaining a preset air pressure of a low-pressure chamber. The method may comprise the steps of: measuring the inside air pressure of a low-pressure chamber; if the difference between the inside air pressure and a preset air pressure is the same or higher than a threshold value, adjusting the inside temperature of the low-pressure chamber by using a thermal conduction part disposed inside the low-pressure chamber; and by using a getter, making the difference to be below the threshold value by adsorbing or releasing molecules inside the low-pressure chamber according to the adjustment of the temperature

公开(公告)号：US20200206728A1

公开(公告)日：2020-07-02

申请号：US16814080

申请日：2020-03-10

Applicant: Korea Aerospace Research Institute

Inventor： Hyok Jin CHO ,  Hee Jun SEO ,  Sung Wook PARK ,  Guee Won MOON

IPC: B01L1/02 ,  F04B37/04 ,  B01J20/02 ,  B01J20/04 ,  B01J20/20 ,  G01L13/00

Abstract: Provided is a method of designing a low-pressure chamber that provides a preset air pressure corresponding to a predetermined altitude. The method may include the steps of: calculating a predetermined error range of the preset air pressure, and calculating an amount and types of materials of a getter to be inserted into the low-pressure chamber based on the error range and a total volume of the low-pressure chamber.

公开(公告)号：US20180216610A1

公开(公告)日：2018-08-02

申请号：US15746526

申请日：2016-04-14

Applicant: Korea Aerospace Research Institute

Inventor： Hyok Jin CHO ,  Hee Jun SEO ,  Sung Wook PARK ,  Guee Won MOON

IPC: F04B37/08 ,  B64G7/00 ,  F04B39/06 ,  F28D20/02

CPC classification number: F04B37/08 ,  B64G7/00 ,  B64G2007/005 ,  F04B37/14 ,  F04B39/06 ,  F04B49/02 ,  F04B2201/0801 ,  F28D20/028

Abstract: Provided is a cryopump enabling the maintaining of a preset temperature during a preset time, even when turned off. The cryopump may comprise: a displacer which adjusts outside temperature by compressing or expanding a refrigerant existing therein; a thermal conduction part which transfers heat outside the cryopump to the refrigerant; and a thermal conduction buffer part which, if the displacer is turned off, absorbs the heat outside that is transferred to the refrigerant, and uses same as energy for changing a phase.