Three items of freezer quality inspection

1. Test the quality skills of freezer compressor: Compressor is the heart of the whole refrigeration equipment, and its quality will directly affect the performance of freezer. Detect the quality of the freezer, from the detection of its old and new and operation.
① the product is marked with the model number, serial number, factory date, power size and other production date labels of the compressor, which can be checked, because new compressors usually have tags.
② the appearance of the new compressor is smooth and will not be rough. The input and output pipe joints are directly welded to the evaporator at one time. If they are re-welded, there will usually be polished marks, which can be seen from the appearance.
(3) judging by the sound of the compressor, because the mechanical sound is generally not heard when the compressor starts to rotate. The increase of running time will make a clear, balanced and stable running sound. Moreover, the sound will gradually become smaller, and no abnormal sound will be made when the machine is stopped.
④ the temperature of the commercial freezer can be passed, because when the compressor is running, the shell can be touched by the back of the hand, and the temperature will be hot. Second, test refrigeration. After the freezer starts running for 5 minutes, touch the freezer condenser (On the cold sides or back) The part should have a hot feeling, and the faster the heat, the better; When opening the freezer door, touch the evaporator with your hand, and you should feel cold; Consumers can put a few cups of cold boiled water in the freezer and adjust the freezer to a quick-frozen state, and test the quick-freezing ability and compressor performance of the commercial freezer through freezing time and efficiency.
third, check the temperature control. When the thermostat is adjusted to the stop position, the compressor should stop immediately; To strong cold location compressor should be shipped zhuan bu ting; After the normal operation of the freezer for a period of time, it should be able to automatically open and stop at certain intervals. At this time, the temperature of the refrigerating chamber should not be higher than 5℃, and the temperature of the freezing chamber should reach the star level; Generally, the number of compressor starts should not be more than 6-9 times per hour.