On February 1, 2018, the expansion and technical transformation project of freezer performance test room with an investment of 150,000 yuan was completed and put into use.In order to increase the capacity of performance test, the company began to plan the expansion and technical renovation of the performance test room of the original freezer in October 2017.Added two test lines;A packing line.The capacity of the first acceptance test of the performance test room of the refrigerator is increased by one third compared with the original, which effectively solves the bottleneck of the final assembly line due to the insufficient capacity of the test room.