How does a refrigerator cool?

Question 1: How does a refrigerator cool? Refrigerator refrigeration principle and Freon

We know that in order to make the temperature inside the refrigerator down, we must find ways to constantly move the heat inside the refrigerator to the outside of the box, so what is the way? We know that the boiling temperature of water at standard atmospheric pressure of 100 ℃, that is, water at 100 ℃ when the "open". In the boiling process, the water to absorb a lot of heat, from liquid to water vapor. Which "absorbs a lot of heat into water vapor" this characteristic is very inspiring to us. So we found a substance, "Freon-12", which does not boil at 100 ℃ like water, but can boil and vaporize at a low temperature of about -30 ℃, and absorbs a lot of heat in the process of vaporization. We use this substance as a refrigerant for refrigerators, so that this liquid substance can boil and vaporize in the evaporator of the refrigerator, absorbing a large amount of heat inside the box to cool down the refrigerator. And because Freon-12 can boil and vaporize at a low temperature of about -30°C, the temperature inside the refrigerator can be reduced to a very low level, for example, the temperature in the freezer room of an ordinary double-door refrigerator can be reduced to less than -18°C (i.e., a three-star standard).

The following is why the refrigerator condenser works』

In order to make the vaporized Freon -12 can also be restored to the original liquid state for reuse, this task is completed by the compressor and condenser. The compressor, through the consumption of electrical energy, compresses the vaporized Freon-12 into high-temperature, high-pressure vapor, and makes this high-temperature, high-pressure Freon-12 vapor flow through the condenser set outside the box, like a radiator to dissipate the heat absorbed inside the box to the air outside the box, so that the refrigerant becomes a high-temperature, high-pressure liquid again. Liquid, so as the refrigerant Freon -12 can be recycled. The compressor is constantly running, the heat inside the refrigerator will be constantly moved to the air outside the box, so the purpose of refrigeration. Refrigerator is also equipped with an automatic control system, through self-adjustment of this control system, can make the box to maintain a certain required refrigeration, freezing temperature. Refrigerator shell are equipped with good insulation materials to prevent the box outside the heat into the box.

The condenser, in order to dissipate the heat, has to be made of a metal with good thermal conductivity, and the strength of the metal, which is also able to withstand pressure and prevent leakage.

Question 2: How does the refrigerator keep cooling? The thermostat is broken, to the set temperature should be disconnected, the result is not open, the result is caused

Change the temperature control switch on the good, but need to be replaced by a professional

Or go to buy a "refrigerator power saving treasure", home appliance repair places are sold, more than ten yuan a. It is a time-controlled socket, but also a time-controlled socket, and a time-controlled socket. It is a time control socket, you can adjust the refrigerator power on time and power off time, for example: power on 30 minutes, power off 10 minutes, back and forth cycle

Question 3: What is the best way to refrigerate the refrigerator? Hello!

Currently on the market there are three main ways of refrigerator refrigeration, namely, "direct cooling", "air-cooled" and "mixed cooling".

Direct cooling or frost refrigerator. The freezer is directly surrounded by the evaporator, or the freezer has an evaporator, and the upper part of the freezer is equipped with an evaporator, and the evaporator directly absorbs heat and cooling. This type of refrigerator structure is relatively simple, small power consumption, good preservation effect, the need for regular defrosting of the refrigerator freezer.

Intercooled (air-cooled) or frost-free refrigerator. There is a small fan inside the refrigerator to force the air inside the box to flow, so the temperature inside the box is uniform, the cooling speed is fast, easy to use. However, because of the defrost system leads to high power consumption, while the fan inside the box will make the refrigerator noisy, while easy to air-dry food, refrigerator manufacturing is relatively complex.

Mixed cooling refrigerator. This form of refrigerator in recent years, the new product is more often used, mainly to take into account the advantages of wind, direct cooling refrigerator at the same time. General freezer with air-cooled, free of defrosting troubles, the freezer room with direct cooling, enhance the effect of freshness of vegetables and fruits. The manufacturing process is complex and costly.

Glad to serve you, thank you!

Question 4: Which is a good refrigerator cooling method? Air-cooled refrigerator refrigeration good, our family just bought eleven, Haier 290W that section, 2 plant 0 liter capacity, large ah, and refrigeration fast, and have not seen the previous kind of ice cubes on the inner wall

Problem 5: Refrigerator which refrigeration is good Refrigerator refrigeration is divided into two main types of cooling direct cooling and air-cooled.

Direct-cooled refrigerator through the evaporator, absorbing heat for cooling, while the air-cooled refrigerator is mainly used in the forced air convection cooling method, through the fan of the wind, making the entire refrigerator inside the stability of the expected, so as to cool down.

The air-cooled refrigerator due to more fan air supply, so the refrigerator indoor temperature is more average, there is no big temperature change, the cooling effect is also naturally better, while taking into account the role of the fan, the air-cooled refrigerator refrigeration speed naturally wear to be faster than the direct-cooled refrigerator. However, also taking into account the role of the fan and complex line design, air-cooled refrigerator in the energy consumption and noise compared to direct-cooled refrigerator is much higher. At the same time, we should note that the fan for food drying effect is also we can not ignore, so the air-cooled refrigerator food to dry relatively faster.

The air-cooled refrigerator is the one that excels in defrosting.

Nowadays, there are some refrigerators that use traditional direct cooling in the freezer, and air-cooled cooling in the freezer. This way the fruits and vegetables in the freezer will not dry out easily and the freezer will not frost. This wind direct cooling refrigeration method of refrigerator is relatively scientific, you can consider when buying.

Question 6: How to adjust the refrigerator button cold ah? Thermostat knob adjustment method: refrigerator temperature control knob generally have 0, 1, 2, 3, 4, 5, 6, 7 when, the larger the number, the lower the temperature in the freezer. General spring and fall days we put on the 3 gear, depending on your requirements, the freezer can reach below -18 degrees. In order to achieve the purpose of food preservation and power saving, summer we can play to 1 or 2 gears, and winter to 4 or 5 gears.

Some people may want to ask, the winter temperature is low, but the temperature is set low (thermostat value is large), the summer temperature is high, but the temperature is set high (thermostat value is small), is not the opposite ah?

In fact, there are many people have such a misunderstanding, that the winter temperature is low can set the refrigerator temperature higher, the summer temperature is high to set lower. Why should the refrigerator thermostat be set this way? The temperature in the refrigerator freezer is usually 4 to 8 degrees, and in winter, the indoor temperature is close to this temperature. If the thermostat knob is still at 3 or less than 3, the refrigerator compressor rarely starts. Although the temperature in the freezer can meet the requirements, but the temperature of the freezer can not reach minus 18 degrees, food is easy to deteriorate, serious food thawing and melting. In summer, the temperature is higher, if the thermostat knob is still 3 or greater than 3, the refrigerator freezer in order to achieve the temperature requirements, the compressor starts frequently. Although the freezer temperature can reach minus 18 degrees, but it causes a waste of electricity, shortening the service life of the refrigerator, which is what we do not want. So correctly adjusting the refrigerator temperature controller knob can make us both fresh and save electricity!

Question 7: How does the refrigerator cool. The gas Fluorine Pleiades from the left side of the compressor low-pressure return pipe into the compressor (black objects at the bottom of the illustration);

The compressor will be Fluorine Pleiades crowded into the high-pressure exhaust pipe;

The capillary tube of the slow resistance and compressor crowded in the generation of high-pressure, where the gas becomes a liquid heat, the condenser plays a role in the dissipation of heat;

Hard to pass through the capillary tube of the Fluorine Pleiades to reach the evaporator (a winding ice ice), and the condenser will not be able to reach the evaporator (a winding ice). Evaporator (a pipe around the inner wall of the ice on the inner layer), the space increases, the pressure decreases, coupled with the low boiling point of Freon, Freon quickly vaporize heat absorption, absorbing a large amount of heat inside the refrigerator, and in the compressor's suction into the compressor, continue the cycle of refrigeration.

Question 8: What is the difference between refrigerator and air conditioner refrigeration ah The principle is the same. Only the air conditioner to move the heat to the outside of the room (a greater distance), the refrigerator to transfer the heat to the outside of the refrigerator (a smaller distance). That's why opening the refrigerator doesn't lower the temperature of the room (it raises it).

Question 9: How does an oxygen-free refrigerator cool? Common household refrigerator refrigeration principle are vapor compression refrigeration. It uses the physical properties of Freon refrigerant, so that the compressor consumes electricity to drive the refrigerant in a closed system for the refrigeration cycle, the heat inside the refrigerator is constantly transferred to the outside of the box, so that the refrigerator to obtain a low temperature. In the history of the development of refrigeration technology, mankind in accordance with the needs of production, life has developed a variety of refrigerants, Freon family is only one of the categories

In order to reduce Freon damage to the ozone layer and comply with the need for human environmental protection, manufacturers have found a few alternatives to Freon refrigerants (chemical composition does not damage the ozone layer, but not necessarily "fluorine-free"). ", such as refrigerant R134a: CH 2 FCF 3 --- tetrafluoroethane), the refrigeration principle is the same as the above. "Fluorine-free refrigerator, fluorine-free air conditioning" is a business speculation, fooling consumers, the purpose is only to increase the price of more money; car air conditioning is the same. Just for reference

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