[Choice of heating and cooling box] Which car heating and cooling box is better to use the selection guide of heating and cooling box
Advantages and disadvantages of semiconductor refrigeration (heat)
1. Volume and cost . No compressor is needed, it is not only small in size but also very low in cost, and it can be used for both cooling and heating.
2. Cooling temperature and heating temperature. The minimum cooling temperature is mostly around 6 degrees Celsius; the temperature difference between the minimum temperature and the ambient temperature is at most 20-25 degrees Celsius; the maximum heating temperature is about 65 degrees Celsius.
Large and medium-sized vehicles can choose a compressor-type on-board refrigerator
1. RVs, buses and commercial vehicles have more space, and for large and large compartments For medium-sized vehicles, if stronger, faster and more constant cooling performance is required, a compressor-type on-board refrigerator with a larger volume and higher power consumption is the first choice.
2. Power interface. Large and medium-sized vehicles have sufficient power, and can even provide a 220V standard power port and a power output of more than 500W.
3. Compressor-type car refrigerators usually have no heating function.
Don’t ignore the heat preservation and heating function
1. The heat preservation effect. The car heating and cooling box is thick and has good thermal insulation performance, so it should have good thermal insulation (cold insulation) performance.
2. The heating function is more practical. In winter, many areas may not need refrigeration (the trunk is the perfect ‘refrigerator’), but enjoying a warm meal and drink on the go is often a luxury. The thermal insulation and heating functions of the vehicle-mounted heating and cooling box come into play at this time. 3. Heating is more efficient than cooling. Fortunately, the heating speed of the car heating and cooling box is relatively faster and more efficient, and the maximum temperature limit of 65 degrees Celsius is sufficient for daily needs.
The relationship between capacity, cooling speed and power
1. The larger the capacity, the slower the cooling (heating). A too accurate example: a mini heating and cooling box with a capacity of 4 liters of 60W power, when the ambient temperature is 28 degrees Celsius, the temperature in the box (empty box) can be reduced to 6 degrees Celsius in about 3 hours, but if the same 60W power is 8 liters The capacity of the heating and cooling box may take more than 6 hours to drop to 6 degrees Celsius.
2. The smaller the power, the slower the cooling (heating). Another inaccurate example: a 4-liter mini heating and cooling box with a power of 60W, if the cooling time to 6 degrees Celsius is 3 hours, if it is replaced with a power of 30W, this time may be extended to more than 6 hours. car).
3. A heating and cooling box with small capacity and high power. In order to ensure good cooling efficiency, on the premise that the capacity is sufficient, a high-power, small-capacity cooling and heating box may be the best choice.
Factors affecting cooling (thermal) efficiency
1. Ambient temperature. The higher the ambient temperature, the slower the cooling speed of the vehicle-mounted heating and cooling box will be, and the faster the heating speed will be; and vice versa.
2. Items to be stored. If it is a bottle of boiled water that you want to refrigerate, the effect of putting it in the car heating and cooling box is not as good as opening the bottle cap and letting it dry outside for a few hours; if it is a piece of ice that you want to melt, the effect of putting it in the car heating and cooling box may be different from that of drying in the sun for a few hours. Hours make little difference.
3. Pre-chill (hot) food and drinks. In order to achieve fast and efficient cooling or heating, it is necessary to pre-cool the food that needs to be refrigerated in the household refrigerator in advance, or pre-heat the food that needs to be heated in the microwave oven, which can achieve faster, more efficient, and more efficient. Constant cooling or heating effect.
4. It is strongly recommended to use ice packs or frozen bottled water to assist in keeping cold, which is more efficient and maintains a constant temperature.
Necessity of dual-use heating and cooling box for car and home
1. Air-conditioning does not come when you want it. Many car owners complain that the cooling speed of the car heating and cooling box is slow, claiming that a bottle of room temperature water is placed in the car refrigerator for 1 hour without much change. The slow cooling speed is indeed the embarrassment of the car heating and cooling box, which is also the time to reflect the advantages of the dual-use cooling and heating box. The dual-purpose car heating and cooling box for home and car can be used either in the car or at home after connecting to the ordinary power supply. It can work in almost any place with power supply, and avoid temperature loss and fluctuation caused by power interruption to the greatest extent.
2. Use the car heating and cooling box in the home environment. The working principle of the vehicle-mounted heating and cooling box is similar to that of the cooling and heating dual-purpose water dispenser. If necessary, the vehicle-mounted heating and cooling box can be used in the home environment through the power adapter, so that the advantages of both home and car are fully displayed. .