Carbon dioxide removal machine. In the process of air conditioning, it is generally required that the concentration of carbon dioxide is controlled within the range of 1% to 5%. The respiration of fruits and vegetables will increase the concentration of carbon dioxide in the reservoir. Excessive concentrations of carbon dioxide can cause poisoning of fruits and vegetables, and produce a series of adverse symptoms that eventually rot and deteriorate. Therefore, it is necessary to install and use a carbon dioxide removal machine (also known as a scrubber) to remove excess carbon dioxide from the reservoir to achieve the optimal range of gas-conditioning parameters.