How do you test a refrigerator?

Buying a refrigerator for your supermarket is a must thing, and you can buy a commercial refrigerator in the store or online. If you buy a refrigerator online, when you receive it, you can check your refrigerator from the following points:

1. Look at the appearance. Make sure the model of the refrigerator is correct, check if the color of the refrigerator is correct, whether the surface is smooth, flat, no scratching and loose. The interior of the refrigerator is required to be smooth, free from cracks and air bubbles, and has no unevenness, no odor and severe stains. The circumference of the box and the box door should be straight, the assembly should be firm, the box door should not be skewed, and the gap between the rotating shaft and the shaft pin should be well matched. The contact points such as the door, the box and the door sill should be well sealed.

2. Power-on inspection. After the power is turned on, the door is checked first. When the door is closed, the air cannot enter and there should be no gaps. Then check the compressor. When the power is turned on, the refrigerator can be started immediately and enter the running state; when the power is turned off, the refrigerator should be stopped normally; when restarted, the compressor should be able to start up and operate normally within 1 second.

3. Listen to the sound. After the compressor starts to start, the refrigerator will vibrate slightly, generating running noise, but the noise should not be higher than 45 decibels, that is, in a quiet environment, only a slight hum of the compressor can be heard. About 1 meter away from the refrigerator, there should be no sound. Hand touch the box, there should be no obvious vibration.
   
   

4. Detect the lights. Open the refrigerator door, the light inside the coller is bright; when the door is nearly closed, the light is off.

5. Check the refrigeration. After the refrigerator is started for 5 minutes, touch the condenser of the refrigerator (on the sides or back of the refrigerator) by hand. It should have a hot feeling, and the faster the heat, the better; when opening the door of the refrigerator, touch the evaporator by hand, there should be a cold feeling; close the cooler door for about 20 minutes, the condenser part is already very hot. Opening refrigerator door and look at the evaporator, there should be a thin layer of uniform frost on the top, if the frost on the evaporator is uneven Or if there is no frost on a certain part, maybe the performance is not good. You can put a few cups of cold water in the refrigerator and then adjust the refrigerator to a "quick-freezing" state to check the quick-freezing capacity and compressor performance of the refrigerator through freezing time and efficiency.

6. Temperature control. When the temperature controller is adjusted to the "stop" position, the compressor should stop immediately; adjust to the "strong cold" position, the compressor should run continuously; after the refrigerator has been running for a period of time, it should be able to automatically rotate at a certain interval. Open and stop, at this time, the temperature of the refrigerator should not exceed 5 °C, the temperature of the freezer should reach the star rating; the number of compressor starts should not exceed 6-9 times per hour.

7. Check the fresh effect. You can put a few apples in the refrigerator and observe the freshness of the apples two days later.

The above is the entire process of checking the quality of the refrigerator, you can use these tips when buying a refrigerator or checking the refrigerator.

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