There are two types of refrigerators: water-cooled and air-cooled. The water-cooled refrigeration effect is good, but it requires cooling water. The air-cooled type is flexible and convenient, without the need for cooling water, and is suitable for use in areas with water scarcity or in mobile situations. The working medium of the freezer is the refrigerant responsible for transferring heat in the refrigeration system. The compressor delay start protection ice water pump overload and indicator light compressor overload protection motor reverse protection and indicator light compressor overload protection and indicator light refrigerant insufficient protection and indicator light refrigerant high-pressure safety valve heat dissipation poor protection and indicator light fault alarm buzzer. The principle is to cool the air below the dew point temperature, and the water vapor in the air condenses into water. By removing the condensate and heating it again, low humidity air can be obtained. The cooling source of air can be the refrigerant of a refrigerator, ice water, or brine. Modern refrigeration dehumidifiers usually use specialized compressors for refrigeration. High standard refrigeration dehumidifier principle humidity concept. The high-temperature gaseous refrigerant entering the condensing coil undergoes heat exchange with water and air sprayed on the outer side of the coil through the coil wall. The temperature of the refrigerant gas decreases with increasing time inside the tube, gradually changing from a gaseous state to a liquid state. By using a fan with super strong wind power, the spray water is fully covered on the outer surface of the coil, thereby improving heat exchange efficiency. After the spray water and air absorb the heat from the coil wall, the temperature increases, and some of the water changes from a liquid state to a gaseous state, taking away a large amount of heat from the pipe wall. The moisture in the humid and hot air is intercepted by the water baffle and introduced into the PVC heat exchange layer, and the hot air is discharged. The water in the PVC heat exchange layer is cooled by the fresh air flowing through it, and the temperature decreases. It flows into the water collection tank and is then pumped into the spray system for further circulation. The water lost to the air is automatically adjusted and replenished by the water level control device