What is the principle of a refrigerator? How did the first person to make a refrigerator come out

Refrigerator refrigeration is based on the principle of mutual transformation of the three states of matter. We know that there are three states of matter: solid, liquid, and gaseous, and the solid state becomes liquid when heated, and the liquid state evaporates into a gaseous state.

In the hot summer, if you get wet, you will feel very cool, because the water on your body is constantly evaporating into water vapor and taking away the heat from your body, so we feel cool. If the whole body is covered with alcohol, it will feel cold, and the alcohol will also evaporate, and it will evaporate faster than water, taking away more heat, and we will not only feel cool, but also cold. Refrigerators also use this principle of liquid substances.

The refrigerant used in refrigerators is not water or alcohol, but a chemical called freon, which evaporates extremely quickly and can take away more heat, so the freezer compartment of the refrigerator can reach a low temperature of minus 18 degrees Celsius. Knowing the principle, let's take a look at the structure of the refrigerator. Refrigerators have compressors, condensers, filter driers, capillaries, evaporators, pipes and other devices.

First of all, we have some gas freon, which must be turned into liquid in order to be used as a refrigerant, and the gas freon enters the cylinder of the compressor, and under the strong pressure of an electric motor, the freon becomes an extremely high pressure gas and enters the condenser. The condenser has fins with a large contact area with air, where the high-temperature and high-pressure gas freon quickly cools down and turns into a liquid. Liquid freon enters the filter drier, and the main function of the filter drier is to filter the impurities and moisture of freon.

After the freon drier comes out of the filter drier, it enters the capillary, which is a narrow tube with an inner diameter of only millimeters, where the freon slowly seeps into the evaporator. The evaporator is the freezer compartment of the refrigerator. The evaporator is a metal cavity that is much larger than the capillary, and the freon encounters a vast space here, and immediately turns into a gas, absorbing a large amount of heat from the evaporator, so that the temperature of the evaporator drops.

The strong suction of the compressor sucks the freon in the evaporator back into the compressor through the pipeline and recycles it. The route that Freon passes is: compressor - condenser - filter drier - capillary tube - evaporator - pipeline - compressor.

Freon is like this, it becomes liquid in the evaporator and absorbs the heat, and it becomes liquid in the compressed gas and condenser, releasing a lot of heat. However, Freon has a fatal drawback, that is, when it volatilizes into the air and is exposed to ultraviolet rays, it will decompose chlorine atoms, which will destroy the earth's ozone layer. It is inevitable that the refrigerator will leak out freon if it is permanent, and the freon leaked by thousands of refrigerators is considerable.

Therefore, in order to protect the environment, refrigerators must be upgraded and find another way to use other substances as refrigerants, but the best way is to make refrigerators that do not use refrigerants. There are already such green refrigerators. Green refrigerators take advantage of the Peltier effect.

When two different metals or semiconductor materials are tightly connected, direct current is introduced, and the two ends of the metal will produce two completely different reactions of cold and heat, this process does not need to use environmentally friendly substances at all, only electricity, after some technical improvements, this refrigerator can be quickly mass-produced.

A 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 in a constant low temperature and cold state. In the past, people put ice cubes in wooden or stone cabinets to preserve them with food, and with the change of technology, in 1822, the famous British physicist Faraday discovered it.

Gases such as carbon oxide, ammonia, and chlorine turn into liquids under pressurized conditions, and turn into gases when the pressure decreases. In the process of changing from liquid to gas, a large amount of heat is absorbed, causing the surrounding temperature to drop rapidly. Faraday's discovery provided a theoretical basis for later generations to invent artificial refrigeration technologies such as compressors.

The first artificial refrigeration compressor was invented by Harrison in 1851.

The box and door body are composed of several chambers according to different temperature requirements, which are isolated from the outside air and maintain a certain low temperature respectively. The box body and door body are composed of box shell, box sleeve, door shell, door tank and other structural parts and thermal insulation materials.

1. Box shells and door shells are generally made of cold-rolled steel plates, and the surface is phosphated and sprayed (or painted). For the sake of aesthetics, the door shell is mostly colored plates, and some refrigerators have used brushed plates.

2. The box and door bladder are generally made of thick ABS board or HIPS board by vacuum forming. The box tank is also made of aluminum plate, which is stronger than plastic, but not as corrosion resistant as plastic.

3 Insulation.

In the past, the insulation layer of the refrigerator was filled with glass wool, and now the insulation layer of the refrigerator is made of polyurethane foamed plastic. Polyurethane foamed plastic is made by adding foaming agent in the polymerization reaction of isocyanate and polyether.

In the past, R11 was used as a blowing agent, which has a great destructive effect on the ozone layer of the atmosphere. The current blowing agent is gradually changed to R141B or cyclopentane, both of which are environmentally friendly blowing agents.

4 door hinges.

The cabinet and door are connected together by door hinges. Single-door refrigerators have two hinges, upper and lower, and double-door refrigerators have upper, middle, and lower hinges. A limiting mechanism and a self-locking mechanism are generally added to the door hinge.

5 Door Seals.

In order to prevent the leakage of cold air in the refrigerator and the invasion of external hot gas, a magnetic door seal is installed around the inner wall of the door body, and the door seal and the iron sheet of the box are tightly sucked by relying on the magnetic force of the magnetic stripe. The door seal is made of flexible polyvinyl chloride extruded into strips, the magnetic adhesive strip is threaded into the hollow tube of the plastic door seal, and the four corners are thermally bonded. The door seal of the Konka refrigerator can basically be removed for easy cleaning.

The refrigerator mainly has that hot and cold pipe inside. That's fine. Refrigeration of things.

What is the freezer made of, and the freezer is suitable for Sima pigments, and I don't know what Ye Liu registered.

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.

The refrigeration principle of the refrigerator is to use the evaporator to absorb the refrigerant, and then send the compressed refrigerant into the condenser, and the condenser will send the liquefied refrigerant into the evaporator through the capillary tube for evaporation and heat absorption, so as to achieve the purpose of refrigerator refrigeration.

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. Working principle of compression refrigerator: This kind of refrigerator provides mechanical energy by the electric motor, and works on the refrigeration system through the 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.

2. Working principle of absorption refrigerator: This kind of refrigerator can use heat source 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. The working principle of semiconductor refrigerator: It is a refrigerator that uses the principle of direct current to produce the Peltier effect on the junction by using the pn-type semiconductor.

4. The working principle of chemical refrigerator: it is a refrigerator that uses certain chemicals to absorb heat strongly when dissolved in water to obtain the refrigeration effect.

5. The working principle of electromagnetic vibrating refrigerator: it is a refrigerator that uses an electromagnetic vibrating machine as the main power to drive the compressor. Its principle and structure are basically the same as those of compression 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.

There are many types of refrigerators today, but they are divided into the following categories: compression refrigerators, absorption refrigerators, semiconductor refrigerators, chemical refrigerators, electromagnetic resonance refrigerators, solar refrigerators, adiabatic demagnetization refrigerators, radiant refrigeration refrigerators, and solid refrigeration refrigerators. Although it is divided into the above types of electric beam leakage refrigerators, the working principle of different refrigerators is also different.

1.Compression 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 the principle that the refrigerant with a low boiling point absorbs the heat of vaporization when it evaporates. Its advantage is that it has a long life and is easy to use, and 91 95 refrigerators in the world currently belong to this category. Nowadays, commonly used refrigerators use a substance called freon as a heat "porter" to "transport" the "heat" in the refrigerator to the outside of the refrigerator.

2.Absorption refrigerators: These refrigerators 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 refrigeration effect.

5.Electromagnetic vibrating refrigerator: It is a refrigerator that uses an electromagnetic vibrating machine 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.

The above is a brief introduction to the working principle of the refrigerator, I believe you will have a deeper understanding of the working principle of the refrigerator after further understanding it.