The sample cooler is a set of sample gas condensation and dehumidification equipment consisting of a cooler box, thermometer, sample gas cooling tube, temperature control valve, vortex refrigeration tube, etc.

The inner wall of the stainless steel box is pasted with insulation material, forming a cooling chamber to prevent the loss of cold air entering the interior of the cooling box.

The sample cooler utilizes compressed air as its power source. It introduces low-temperature air, generated at the cold end of the vortex refrigeration tube and close to 0℃, into the cooling chamber to cool the sample gas.

The spiral cooling section of the sample gas cooling tube is entirely located within the cooling chamber of the cooler. When the sample gas passes through the hollow spiral structure inside the sample gas cooling tube, it flows from top to bottom and comes into full contact with the outer wall of the tube, causing the sample gas to be cooled and the moisture to condense. Under the combined effects of the self-gravity of condensed water droplets and the propulsion of the sample gas flow, the water droplets are discharged downward. The dried sample gas flows from the bottom up through the central tube of the sample gas cooling tube. The cooled and dried sample gas then cools the inner wall of the cooling tube, ensuring that both the inner and outer shells of the sample gas cooling tube remain in a low-temperature environment, thereby achieving a better dehumidification effect. The temperature inside the cooler box is controlled by adjusting the flow of compressed air entering the scroll refrigeration tube through a temperature control valve, in order to avoid issues such as condensed water freezing due to excessively low temperature, sample gas tube blockage, and failure to achieve cooling and dehumidification effects due to excessively high temperature. Generally, the temperature inside the cooling chamber is controlled between 3-8℃. The sensitive head of the thermometer's capillary tube is installed on the outer wall of the sample gas cooling tube to display the temperature of the condensation tube.