小型制冷设备及家用电冰箱在维修过程中充加制冷剂时,普遍存在制冷剂充入量难以准确控制的问题。而系统中制冷剂是否适量是关系到设备能否正常运行和能否发挥较好的制冷效果的重要因素。对于小型制冷设备来说,制冷量和功率消耗与制冷剂充入量是否适量有密切的关系,直接影响P_0,P_k的变化。当制冷剂充入量太少时,蒸发器上不能全 Small refrigeration equipment and household refrigerators in the maintenance process, add refrigerant, the prevalence of refrigerant charge is difficult to accurately control the problem. Whether the amount of refrigerant in the system is an important factor is related to the normal operation of the equipment and can play a better cooling effect. For small refrigeration equipment, the cooling capacity and power consumption and refrigerant charge is appropriate whether there is a close relationship, a direct impact on P_0, P_k changes. When the refrigerant charge is too small, the evaporator can not be full