The first time I bought a car refrigerator was when I had a baby, and I was thinking about going out or playing. What should I do with my breast milk? Later, I simply bought a car refrigerator, which directly solved this problem. Later, when the baby got older, we used it to ice drinks, and found that it is good to learn to enjoy life, especially in summer. Many friends may choose to go out and drive by themselves during the holidays. In addition, the weather is getting hotter and hotter, and long-term driving will inevitably lead to dry mouth. How comfortable and comfortable it is to have a bottle of iced Coke at this time, so it is time to give yourself love The car is equipped with a car refrigerator, and for families with babies, the car refrigerator ensures the freshness of breast milk, which is really very convenient.
Based on the experience of choosing a car refrigerator, I have also done a lot of homework, hoping to help myself choose a cost-effective car refrigerator. Now share it with everyone, I hope it can help. To choose a good car refrigerator, we need to understand the principle of car refrigerator first.
1. Refrigeration method
The motivation for most families to buy a car refrigerator is that it can be refrigerated with the car. At present, refrigerators can be divided into compression type, absorption type, and semiconductor type according to the refrigeration method. The working principles of these refrigeration methods are completely different, and each has certain advantages. Disadvantages, I made a table to compare and analyze:
| working principle | Compressed | Absorption | semiconductor type |
| Cooling efficiency | higher | lower | lower |
| noise | Below 50db(A) | basically none | none |
| Use ambient temperature | Below 43℃ | Below 30℃ | none |
| energy | Single-phase AC power | Electricity, Gas, Solar etc. | DC power supply |
At present, most of the car refrigerators use compression or semiconductor refrigeration. Now let's talk about the working principles, advantages and disadvantages of these two refrigeration methods. I hope it will be helpful to everyone's purchase reference.
Semiconductor refrigeration: Using the Peltier effect, the functions of cooling and heating can be realized at the same time, but the cooling efficiency is low, it takes a long time to achieve the expected effect, and is greatly affected by the ambient temperature.
Compressor refrigeration: The working principle is the same as that of household refrigerators, the lowest temperature can reach -18 ℃, and the price is almost 5 times that of semiconductor car refrigerators.
From the above comparative analysis, if the family has sufficient budget and frequent outdoor self-driving tours, the refrigeration requirements are high. It is recommended to choose a car refrigerator with compressor refrigeration. If you only drive occasionally, it is recommended to use a semiconductor refrigeration car refrigerator.
2. Compressor (for compression refrigeration refrigerators)
For friends who choose compression refrigeration refrigerators, the compressor is the soul of the entire car refrigerator. He obtains liquid refrigerant through mechanical compression (compressor), convection heat exchange (condenser), and throttling and depressurization (capillary). , The liquid refrigerant is evaporated into a gaseous state (evaporator) in the refrigerator box, and the heat in the box is taken away through phase change, so as to achieve the cooling effect. When a good compressor is working, the noise is small.
3. Capacity
The current car refrigerators can provide a lot of volume options, ranging from 5L to 20L, covering models from off-road trucks, trucks, cars, taxis, etc. It is best to measure the exact size when purchasing, such as putting In the trunk or outdoor picnic, you need to buy more than 30L of products, and if you put it in the center armrest of the rear row for easy access, then a car refrigerator of about 10L can be satisfied.
4. Power
Generally, the power of the car refrigerator is about 50W. For example, the car refrigerator I am using now has a volume of 18L, and the overall average power is 55W, which is enough to meet the needs of daily life.
When purchasing a car refrigerator, in addition to the above parameters, you should also refer to the heat preservation time, the seismic performance, whether it has anti-electromagnetic interference, low-voltage battery protection, anti-dumping protection and other functions. After you get the car refrigerator, test the machine. See if there is frost on the bottom, this can judge the refrigeration performance of the refrigerator.