Electronics
Testing of household frost free refrigeration appliances
Testing of household frost free refrigeration appliances
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Testing of household frost free refrigeration appliances

Structure 1. Defrosting timer (calculates that the power supply to the compressor is cut off and supplied to the evaporator and water-saving tank heating wire after the compressor has been working for 17-24 hours) 2. Evaporator heating wire (evaporator heating and defrosting) 3. Water tank heating wire (water tank heating and defrosting) 4. Defrosting temperature controller (controls the temperature during defrosting) 5 The working principle of a bimetallic sheet or temperature fuse (a protective device to prevent the failure of the defrosting temperature controller) is as follows:

The defrosting timer accumulates and calculates that the power to the compressor and circulation fan will stop after the compressor has been working for 17-24 hours. At the same time, the defrosting temperature controller and temperature fuse will supply power to the evaporator and water-saving tank heating wire, When the defrosting temperature controller reaches the critical point (the temperature at which the defrosting temperature controller is located), disconnect the power supply to the heating wire (if the defrosting temperature controller reaches the critical point and is not disconnected yet, the temperature fuse will overheat and disconnect). At this point, the defrosting process ends, and then the timer resumes power supply to the compressor, delaying power supply to the circulating fan for a few minutes, and refrigeration starts again. Product Features Editing Broadcast Advantages 1. The evaporator of the automatic defrosting refrigerator, as it does not come into direct contact with food, can be heated up for a short time through the heating system. After defrosting, the refrigeration immediately resumes, and the temperature fluctuations inside the refrigerator are minimal. 2. The interior of a clean, refreshing, and frost free refrigerator is clean and refreshing. Its cold air system will remove excess moisture from the box during the refrigeration process, so it will not produce frost. When food is frozen, it will not freeze together. In addition, its continuously circulating cold air, filtered by the deodorization system, keeps the odor in the refrigerator fresh for a long time, greatly reducing the phenomenon of food cross flavors. 3. The uniform cooling air system for refrigeration is like installing an air conditioner in a refrigerator, where the cold flow is seamless and the temperature inside the refrigerator is stable and uniform. Direct cooling refrigerators rely on natural convection for direct cooling, just like placing a piece of ice inside the refrigerator. Food near the evaporator will be very cold, while some places far away from the evaporator can easily form frozen dead spots, causing food to spoil. 4. The temperature is precise and frost free. The temperature of the refrigerator is uniform, and the temperature control point is the temperature at any point. The temperature inside the refrigerator is very accurate. However, due to the presence of freezing dead spots in direct cooling refrigerators, the temperature at the temperature control point often differs by several degrees from the actual temperature, which affects the quality of food preservation. The disadvantage is high power consumption and manufacturing costs. Due to the air-cooled refrigerator, the food preservation effect is not as good as that of a direct cooled refrigerator

Function of testing report:

1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report

2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms

3. Used as a sales report: issuing legally effective testing reports to make consumers more confident

4. Papers and research: Provide professional personalized testing needs

5. Judicial services: providing scientific, fair, and accurate testing data

6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problems

Baijian and testing process:

1. Telephone communication and confirmation of requirements

2. Recommend solutions and confirm quotations

3. Mail samples and arrange testing

4. Progress tracking and result feedback

5. Provide reports and after-sales service

6. If urgent or priority processing is required

Testing and testing characteristics:

1. The testing industry is fully covered, meeting different testing needs

2. Fully cover the laboratory and allocate localized testing nearby

3. Engineers provide one-on-one services to make testing more accurate

4. Free initial testing, with no testing fees charged

5. Self service order delivery for free on-site sampling

6. Short cycle, low cost, and attentive service

7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc

8. The testing report is authoritative and effective, and is generally used in China