Patent ID: 8800303
Filing Date: 2014-08-12
Classification: B01D,F04B,Y10S

Abstract:
1. A cold trap, comprising: a cold panel; a refrigerator comprising a cooling stage configured to cool the cold panel; a temperature sensor configured to measure a temperature of the cold panel; and a controller configured to control a regeneration process of the cold panel, the regeneration process comprising raising the temperature of the cold panel to a temperature exceeding a non-liquefaction temperature range of a gas frozen on a surface of the cold trap, wherein the controller is configured to control the temperature of the cold panel based on measurement of the temperature sensor so that an ambient pressure around the cold panel is maintained in a pressure range in which the gas frozen on the surface is evaporated without being melted, wherein the temperature sensor is provided in the cooling stage, wherein the cold trap further comprises a pressure sensor configured to measure the ambient pressure around the cold panel, wherein the controller is configured to control the refrigerator to temporarily cool the cold panel when a measured ambient pressure exceeds a permitted pressure range.