Thermoelectric cooler is a small-sized (about the size of a large women's bag) device used for its intended purpose, that is, for food storage. If at home we are used to seeing huge refrigerators in the whole wall, then it is convenient to take thermal refrigerators with them to the dacha, to the nature or to take a long car trip with the family.
Principle of operation
First of all, to understand how this simple device works, you need to know what the Peltier effect is. This is a phenomenon during which heat release and absorption take place. With reference to the models of refrigerators in question, this happens as follows: the current passes through a thermopile, at the junction of two conductors absorption and heat release occurs, thus one half of the battery heats up, the other cools. In order for the effect to work, the cold part is placed in the environment that needs to be cooled, and the hot part in the surrounding.
What is it made of?
- Power supply used to change AC voltage to DC.
- The radiator is an aluminum ribbed part used to release heat.
- The fan is a device opposite to the radiator to remove heat.
- The distributor is responsible for ensuring that cold comes to the refrigerator.
- The power supply operation regulator has two modes: from 0 to 5 degrees Celsius and from 8 to 12 degrees.
- Removable cover and shockproof housing.
Inside a large-size refrigerator, an aluminum plate equilibrates the heat that is absorbed, and thermoelectric modules transfer this heat to a stabilizing device that will dissipate it. It is usually located under the control panel of the refrigerator. And then, already a mini-fan dissipates heat into the open air from the refrigerator. At present, there are only two types of thermal refrigerators on the modern market: for cars and cooler bags. It should be noted that thermal coolers can also heat up any food, you just need to switch the mode from cooling to heating.
Comfortable to go on a long journey, when you know that problems with cold drinks and fresh food will not arise. For such purposes it is worth buying a refrigerator in your car. Thermoelectric models are made for three types of cars:
- A miniature fridge where only a couple of drink cans fit.
- Small closet or dresser. Dimensions allow you to install them in any free space of the machine.
- Box It is built into a special niche.
Such products operate on the network at 12 and 14 B, but if a charging rectifier is used, it is possible to connect a 220 and 127V refrigerator. The material of the outer part of the case is black artificial leather, under it is a sheet of steel. Inside - food aluminum, and heat insulation occurs due to molded polystyrene foam.
Portable cooler bag
The most convenient device for trips to nature. The handle and the case repeat the outlines of the bag familiar to all. Tip: put the food better already chilled in the home refrigerator, then they will remain fresh. Also, you can put cold batteries or specialized bags with ice. If you want to keep the dish prepared in advance warm, the thermoelectric bag can work in a thermos mode. Complete with a refrigerator there are always two covers, one of which with a handle, thanks to which it is easy to carry the refrigerator anywhere, and the second with all kinds of wires and switches. For a convenient location of the thermal cooler in the trunk, an elongated wire is provided.
The first and one of the most basic distinguishing qualities of this type of refrigerator is noiseless operation. It does not move and does not shake, like a stationary refrigerator in the house of each of us. Therefore, thermal refrigerators are used in wards of hospitals for patients. You can install them in the rooms of the apartment, if the kitchen does not have enough space. Low cost in operation - no less important criterion for choosing a refrigerator. In comparison with absorption and compressor, this model consumes much less electricity at the rate of one liter of the cooled volume.
Reliability and long service guaranteed by manufacturers. Such refrigerators almost never require repair. About such dignity, as small sizes, has already been said above. It is necessary to understand that banks with twists for the winter in such a refrigerator obviously will not fit. Another reason why thermocoldins buy cars is the fact that they tolerate shaking, vibration, can turn over and work in such a state.
The internal structure of the refrigerator is not stuffed with complex connecting pipes, which does not allow rubbing and moving some parts of the structure, which, in consequence, can fail. The elaborate temperature regimes make it possible to adjust it to the nearest degree. Gas or liquid coolers are not required.
The issue of price is currently quite difficult to understand., because a few years ago thermoelectric refrigerators cost a lot of money, comparable to domestic full-size refrigerators, now the cost varies depending on the manufacturer, brand, materials used, equipment and many other factors.
What to choose?
Since the efficiency of thermoelectric refrigerators is extremely low (approximately, only 16%), the main task of it is to keep food cold, so it’s better, taking food from a house for a picnic, to keep them in a home refrigerator for a while. If you take a refrigerator for cooling, but not for heating, you should let the empty inner chamber cool before using. In the car, thanks to the long cord, you can install a refrigerator behind the driver’s seat. On sale, along with cooling devices, special so-called cold accumulators are also sold. They will help the refrigerator cool food.
Based on customer feedback
The main mistake of everyone who wants to buy a portable refrigerator is that they do not know the principles of its operation, and therefore, after the purchase, they are disappointed. Thermocoobie will not replace the home. Its purpose is slightly different. Remember that warm food products are unlikely to make cold. As practice shows, cooling occurs at 15 degrees from the ambient temperature. Time for this process will take about 20 minutes.
Of the advantages distinguished by users, there are such as good capacity (although it depends on the model chosen and the dimensions of the products you want to put); the ability to work from the cigarette lighter in the car, and from the household outlet; heating function; compactness; the ability to keep food cold for a long time. There are few disadvantages: a lot of weight, a high price (which, again, depends on the chosen model, but on the whole the range presented by modern manufacturers is diverse).
In general, a thermoelectric refrigerator - it is an indispensable assistant in the conduct of self-leisure at the sea, lake, in the country. Cool water or juice on the beach during the day with a convenient opportunity to connect to the car, frozen meat stored for about 3 days in the refrigerator and did not melt when connected to a wall outlet in the house. Freshly prepared food from the house on the road can be heated if necessary or, in order to preserve its freshness for a long time, at a comfortable temperature, it will lie in a thermoelectric refrigerator.