... system etc..3.suck the low pressure and low temperature gas from the sucktion pipe , through the operation of the motor ... drives ,the piston can compress the gas of the cold storage , provides the power for the cold ... a sealed enclosure,with low noise and good sealing .6. Refrigerant : R134a ,R404A , R22 ,R5027.Applicable objects: flowers, tea, medicine, medicine, medical ...