Low-pressure chamber providing preset air pressure

Patent metadata

Field	Value
Publication number	US-10632459-B2
Application number	US-201615745177-A
Country	US
Kind code	B2
Filing date	Apr 14, 2016
Priority date	Jul 22, 2015
Publication date	Apr 28, 2020
Grant date	Apr 28, 2020

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.

First claim

The invention claimed is:

1. A low-pressure chamber that provides a preset air pressure corresponding to a predetermined altitude, the low-pressure chamber comprising:
a pressure measurer configured to measure an inside air pressure of the low-pressure chamber;
a temperature controller disposed inside the low-pressure chamber to adjust, when a difference between the inside air pressure and the preset air pressure is greater than or equal to a threshold, a temperature of a thermal conductor disposed inside the low-pressure chamber; and
a getter connected to the thermal conductor to absorb or release molecules inside the low-pressure chamber based on the adjusted temperature such that the difference is less than the threshold.

2. The low-pressure chamber of claim 1 , wherein the temperature controller is configured to adjust the temperature of the thermal conductor using a fluid circulating in the thermal conductor.

3. The low-pressure chamber of claim 1 , wherein the temperature controller is configured to adjust the temperature of the thermal conductor through a thermal conductive element connected to the thermal conductor.

4. The low-pressure chamber of claim 1 , wherein the getter comprises at least one of activated carbon, barium, magnesium, zirconium, and phosphorus as a constituent material.

5. The low-pressure chamber of claim 1 , further comprising:
a thermal conductive material layer configured to fill a gap between the getter and the thermal conductor to perform a heat exchange.

6. The low-pressure chamber of claim 5 , wherein the thermal conductive material layer is formed by mixing hexamethylene diisocyanate, methylenediphenyl isocyanate, isophorone diisocyanate, and dibutyltin dilaurate with a synthesized polyol.

7. A method of maintaining a preset air pressure of a low-pressure chamber, the method comprising:
measuring an inside air pressure of the low-pressure chamber;
adjusting, when a difference between the inside air pressure and the preset air pressure is greater or equal to a threshold, a temperature of the thermal conductor disposed inside the low-pressure chamber; and
absorbing or releasing molecules inside the low-pressure chamber using a getter based on the adjusted inside temperature of the low-pressure chamber such that the difference is less than the threshold.

8. The method of claim 7 , wherein the adjusting of the temperature of the thermal conductor comprises adjusting a temperature of the thermal conductor using a fluid circulating in the thermal conductor.

9. The method of claim 7 , wherein the adjusting of the inside temperature of the low-pressure chamber comprises adjusting a temperature of the thermal conductor through a thermal conductive element connected to the thermal conductor.

10. The method of claim 7 , wherein the getter comprises a porous membrane that increases an adsorbability associated with the molecules inside the low-pressure chamber.

Assignees

• Korea Aerospace Res Inst

Inventors

• Cho Hyok Jin
• Seo Hee Jun
• Park Sung Wook
• Moon Guee Won

Classifications

• B01L1/02 Primary

  Air-pressure chambers; Air-locks therefor · CPC title

• B01L2200/146

  Employing pressure sensors · CPC title

• B01J20/04

  comprising compounds of alkali metals, alkaline earth metals or magnesium · CPC title

• B01L2300/14

  Means for pressure control · CPC title

• B01J20/20

  comprising free carbon; comprising carbon obtained by carbonising processes · CPC title