US 12,336,467 B2
Temperature control system of a rice paddy methane flux collecting device
Namgoo Kang, Daejeon (KR)
Filed by KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE, Daejeon (KR)
Filed on May 12, 2021, as Appl. No. 17/317,950.
Prior Publication US 2021/0378183 A1, Dec. 9, 2021
Int. Cl. A01G 9/24 (2006.01); A01G 22/22 (2018.01); G01N 1/22 (2006.01)
CPC A01G 9/24 (2013.01) [A01G 22/22 (2018.02); G01N 1/2226 (2013.01); G01N 2001/2241 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A temperature control system of a rice paddy methane flux collecting device, comprising:
a chamber body which has a collecting space formed therein and is opened in a vertical direction, and is installed so that a certain number of rice grains are located in the chamber body;
a chamber door configured to open and close an upper side of the collecting space;
a collecting unit configured to collect a sample gas in the collecting space;
a heating unit configured to increase a temperature in the collecting space;
a cooling unit configured to decrease the temperature in the collecting space;
a circulation unit configured to circulate the gas in the collecting space;
a ventilation unit configured to ventilate the collecting space;
an external temperature sensor configured to measure an external temperature outside the chamber body;
an internal temperature sensor configured to measure the temperature in the collecting space of the chamber body; and
a temperature controller configured to receive signals from the external temperature sensor and internal temperature sensor to control one or more of the heating unit, the cooling unit, the circulation unit, and the ventilation unit based on the received signals so as to maintain the temperature in the collecting space to be equal to the external temperature,
wherein the temperature in the collecting space is maintained equal to the external temperature by the temperature controller before collecting the sample gas by the collecting unit, such that the sample gas of the natural environment state is collected in an artificial environment which is the same as the natural environment, and
wherein the chamber door comprises:
a door base frame provided across a middle of an upper end of the chamber body;
a first chamber door pivotally provided at one end of the door base frame to open and close one portion of the collecting space divided by the door base frame; and
a second chamber door pivotally provided at the other end of the door base frame to open and close the other portion of the collecting space divided by the door base frame.