Refrigerators are very common in family life, what is the refrigeration principle of refrigerators?

A refrigerator is an enclosed insulated appliance for household use, with an appropriate volume and equipment, and cooled by an electrically consuming device. It has one or more compartments for the preservation of food, while it has at least one compartment where the temperature is kept above 0 degrees. The refrigeration principle of the refrigerator is simply to use the refrigerant in a confined space through a compressor.

The process of liquid-gas-liquid conversion. That is: the use of a compressor will come from the evaporator.

The low-temperature and low-pressure gas is compressed into a high-temperature and high-pressure gas and then passed through the condenser.

Condense, turn into a low-temperature and high-pressure liquid, and then turn into a low-temperature and low-pressure gas through the decompression throttling of the capillary, enter the evaporator and achieve the purpose of cooling through the absorption box. refrigerant in the circulating system.

The conversion of gas, liquid and gas is carried out repeatedly to achieve the purpose of refrigeration.

A refrigerator is a refrigeration appliance that can keep a constant low temperature and is a civilian product that keeps food or other items in a constant low temperature and cold state. It is divided into: compression, absorption, semiconductor, chemical, electromagnetic vibration, solar, solid-state refrigeration, etc., and the commonly used is compression refrigerator.

To understand the principle of refrigerator refrigeration, we must first understand the vaporization and liquefaction of substances in physics. 1. What is liquefaction and gasification? Liquefaction and vaporization are both processes of transformation of the state of matter.

Matter exists in nature in three states, namely solid, liquid, and gaseous, and can be converted into each other under certain conditions (temperature, pressure).

Liquefaction is the process of converting a substance from a gaseous state to a liquid, in which the substance releases heat; Vaporization is the process by which a substance is converted from a liquid state to a gaseous state, in which the substance absorbs heat. The refrigerator uses the principle of vaporization and liquefaction of substances. Second, the basic composition of the refrigerator:

The refrigerator is mainly composed of a compressor, a condenser, a capillary, an evaporator, and a refrigerant. The compressor plays the role of compressing the refrigerant, the condenser plays the role of cooling the gas into liquid, the capillary is to release the pressure of the compressed refrigerant, and the evaporator is to convert the liquid into gas, and the refrigerant is actually heat"Porters"That is, to carry the heat from the refrigerator to the outside of the refrigerator.

1. The compressor compresses the refrigerant gas. This increases the pressure and temperature of the refrigerant (orange), while the heat exchange coils on the outside of the refrigerator help the refrigerant dissipate the heat generated by pressurization. 2. When the refrigerant is cooled, the refrigerant liquefies into liquid form (purple) and flows through the safety valve.

3. When the refrigerant flows through the safety valve, the liquid refrigerant flows from the high-pressure area to the low-pressure area, so it expands and evaporates (light blue) 4. During the evaporation process, it will absorb heat and exert a refrigeration effect. 5. The coil in the refrigerator helps the refrigerant absorb heat and keeps the inside of the refrigerator cold. Then, repeat the cycle.

It should be that there will be a compressor in the refrigerator, and then the cold air can be directly generated through the compressor, which also requires some machines inside the refrigerator to work.

The working principle of the refrigerator is that through the work of the compressor and the refrigeration system, the motor is used to provide mechanical energy, and the refrigeration system can use the refrigerant to absorb heat and get the purpose of freezing.

There will be a refrigerant in the refrigerator, and the heat will be emitted by liquefaction, and after evaporation, the heat will be absorbed, so that the effect of freshness can be achieved.

The working principle is to use the parts inside, such as refrigerant, to play a refrigeration effect, and a lot of food can be placed in it, which is not easy to break.

The working principle is that through the compressor, and then through the evaporator, it can play a refrigeration effect, and the heat can be released from the condenser, and then it can be used for circulation.

The change of water in the refrigerator for 2 to 8 hours is recorded as follows:1. The water gradually frosts in the refrigerator.

2. From the outside to the inside, the frost gradually solidifies into an ice-water mixture.

3. As the temperature gets lower and lower, the freezing rate will get faster and faster.

4. The crystallization formed by the orderly arrangement of water molecules becomes solidified water.

There are cabinets or boxes that freeze through compressors and ice machines, and storage boxes with refrigeration devices. Its invention can be traced back to the nineteenth century, and the world's first artificial refrigeration household refrigerator was born in 1879, after years of development and innovation, China began to produce household refrigerators in the second half of the 50s of the 20th century.

How the refrigerator worksCompression refrigerators, which provide mechanical energy by an electric motor and work on the refrigeration system through a compressor. The refrigeration system is made by using a refrigerant with a low boiling point, which absorbs heat during evaporation, and its advantages are long life and easy to use, and 91 to 95% of the world's refrigerators belong to this category. Commonly used refrigerators use a refrigerant called R600 Refrigerator A as a heat porter to carry the heat from the refrigerator to the outside of the refrigerator.

Absorption refrigerators, which can use a heat source as a power source. The mixed solution of ammonia, water and hydrogen is used to achieve the purpose of refrigeration in the process of continuous absorption and diffusion. Its disadvantage is low efficiency and slow cooling, and it has been gradually phased out.

Semiconductor refrigerator is a refrigerator that uses the principle of direct current to produce the Peltier effect on the junction of the PN-type semiconductor.

1. Compression refrigerator:

This type of refrigerator uses an electric motor to provide mechanical energy, which works on the refrigeration system through a compressor. The refrigeration system is made by using the principle that the refrigerant with a low boiling point absorbs the heat of vaporization when it evaporates. Its advantages are long life and ease of use, and currently 91 95% of refrigerators in the world belong to this category.

2. Absorption refrigerator:

This type of refrigerator can use heat sources (such as gas, kerosene, electricity, etc.) as power. The mixed solution of ammonia, water and hydrogen is used to achieve the purpose of refrigeration in the process of continuous absorption and diffusion. Its disadvantage is low efficiency and slow cooling, and it has been gradually phased out.

3. Semiconductor refrigerator:

It is a refrigerator that uses the principle of direct current to produce the Peltier effect on the junction of the PN-type semiconductor.

4. Chemical refrigerator:

It is a refrigerator that uses certain chemicals to absorb heat strongly when dissolved in water to obtain a cooling effect.

5. Electromagnetic vibration refrigerator:

It is a refrigerator that uses an electromagnetic vibrator as the main power to drive the compressor. Its principle and structure are basically the same as those of compression refrigerators.

6. Solar refrigerator:

It is a refrigerator that uses solar energy as a cooling energy source.

7. Adiabatic demagnetization refrigeration refrigerators, radiation refrigeration refrigerators, and solid refrigeration refrigerators.

The refrigerator is a kind of refrigeration equipment that can maintain a constant low temperature, and the refrigerator mainly relies on the operation of compressors, condensers, capillaries, evaporators, and refrigerants for refrigeration when working in the bright source line. The working principle of the refrigerator is actually very simple, thenRefrigerator principle

When the refrigerator is working, the refrigerant is mainly sucked in through the compressor, the refrigerant will become a gaseous refrigerant with high temperature and high pressure after being sucked into the compressor, and the refrigerant after compression will be transported to the condenser through the pipeline, and the refrigerant will begin to be exothermic in the condenser, and after condensation, the gaseous refrigerant with high temperature and high pressure will become a liquid refrigerant with low temperature and high pressure, and the refrigerant will enter the capillaries after condensation, and the throttling and decompression through the capillariesThe space in the evaporator is much wider than that of the capillaries, and the liquid refrigerant at low temperature and low pressure will quickly absorb heat and evaporate after entering the evaporator, and finally become an isothermal and isobaric gaseous refrigerant, and then the gaseous refrigerant will be sucked in and compressed by the compressor again to continue the refrigeration cycle. As the refrigerant evaporates and absorbs heat, the temperature in the refrigerator also decreases, and finally the effect of refrigeration is realized.

What is the principle of a refrigerator?

1. The principle of gas absorption refrigerator: this kind of refrigerator is mainly powered by heat source, and gas absorption refrigerator often uses ammonia as a refrigerant, so that the evaporation conditions of liquid ammonia can be formed, and it also uses hydrogen as a diffusion agent, using a mixed solution of ammonia, water and hydrogen to complete the refrigeration work. Because there is no mechanical operation when the gas absorption refrigerator is working, it will not produce noise during operation, and the structure is simpler than other types of refrigerators, the production cost is relatively low, and the service life is very long.

2. The principle of semiconductor refrigerator: the semiconductor refrigerator mainly uses semiconductor materials to produce the Peltier effect when working, and it uses p-type semiconductors and n-type semiconductors to make electric couples, which will produce exothermic and endothermic phenomena at its nodes after direct energization, so as to achieve the purpose of refrigeration. Compared with the use of semiconductors for refrigeration and mechanical refrigeration, it is small in size, does not produce noise and vibration during operation, and its cooling speed can be adjusted at any time when it is used, so it is very convenient to use, but it is relatively high, so it has not been popularized.

The above is what is the principle of the refrigerator brought to you? The full content of the detailed explanation of the refrigeration principle of refrigerators.

1. The compression refrigerator uses an electric motor to provide mechanical energy, mainly through the work of the compressor and the refrigeration system to cool down. The refrigeration system uses the low boiling point of the refrigerant to cool the air. Made by the principle that the refrigerant absorbs the heat inside the refrigerator, this kind of refrigerator will have a relatively long life and is easy to use, and most refrigerators adopt this design and working principle.

2. Refrigerator is a kind of refrigeration equipment that maintains a constant low temperature, and it is also a civilian product that keeps food or other items at a constant low temperature. Inside the box there is a compressor, a cabinet or box for ice making for icing, and a storage box with a refrigeration unit. Gas compression refrigerator is a refrigerator that relies on low boiling point liquid refrigerant vaporization to absorb heat to achieve the purpose of refrigeration, and then evaporates and compresses it with a compressor, and then exothermic liquefaction to complete the refrigeration cycle.

Due to the theory, production technology and process of this refrigerator, the service life is relatively mature, so more than 90% of the refrigerators produced in China are this kind of refrigerators.