Refrigerator refrigeration principle, what is the refrigerator refrigeration principle

Refrigeration principle: The refrigeration principle of the refrigerator is the evaporator.

Absorbs refrigerants.

The compressed refrigerant is then fed into the condenser.

, the condenser passes through the capillaries.

The liquefied refrigerant is sent into the evaporator for evaporation and heat absorption, which achieves the purpose of refrigerator refrigeration.

Refrigeration stage of the refrigerator:

1. Adiabatic compression: It uses the compressor to suck in the evaporated low-temperature and low-pressure refrigerant, and through the sharp compression of the piston, the mechanical engineer of the gas is converted into heat, so that it becomes a high-temperature and high-pressure gas.

2. Isothermal compression: After the refrigerant becomes a gas with high temperature and high pressure, the compressor will transfer the refrigerant in the gaseous state to the condenser to liquefy, and then the latent heat of condensation will be released, and the temperature of the refrigerant will not change, but the gas will become liquid.

3. Adiabatic expansion: the refrigerant in the liquid state is throttled in the capillaries, so that the pressure of the liquid drops to the pressure of evaporation, and the temperature of the refrigerant drops sharply in this process, but the time is short and can not absorb the heat from the outside.

4. Isothermal expansion: the refrigerant that enters the evaporator evaporates rapidly, continuously absorbs the heat inside the refrigerator, and knows that all the liquefied refrigerant is vaporized, and the temperature of the total refrigerant is in a constant state in this process, so it is called isothermal expansion.

When a gas becomes a liquid, the heat of condensation is released, and conversely, when the liquid becomes a gas, the heat of vaporization is absorbed. When the refrigerator compressor is working, the gaseous refrigerant is compressed and liquefied, the refrigerant is heated, and the heat is dissipated through the heat dissipation system, and the temperature is reduced to become a high-pressure liquid, when the liquid is sprayed out through the capillary, the pressure suddenly decreases, and soon the liquid becomes a gas, and at the same time absorbs a large amount of vaporization heat, so that the temperature in the refrigerator is reduced, and the temperature of these gases rises after heat absorption, and is pumped back by the compressor to compress ......As the cycle continues, the temperature in the refrigerator gets lower and lower.

Relying on the compressor to realize the change of the physical state (liquid vapor state) of the refrigerant, and using the principle of absorption and release of the physical state of the refrigerant, the refrigeration effect of continuously transferring the heat in the refrigerator to the outside of the refrigerator to achieve the gradual reduction of the temperature in the refrigerator is achieved.

In general, the refrigeration principle of the refrigerator is that the evaporator absorbs the refrigerant and then sends the compressed refrigerant into the condenser, and the condenser sends the liquefied refrigerant into the evaporator through the capillary for evaporation and heat absorption, which achieves the purpose of refrigerator refrigeration.

A refrigerator is a refrigeration device 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. The refrigerator box contains a compressor, an ice machine, and a cabinet or box for freezing, as well as a storage box for the refrigeration unit. Whether it is a home, a restaurant, a store, etc., it will be seen, and the volume of household refrigerators is usually 20-500 liters.

The refrigerator should be placed in a position that is free from direct sunlight and conducive to ventilation, and at the same time keep a distance from the wall to facilitate heat dissipation during the operation of the refrigerator.

Precautions for refrigerator maintenance

1. The refrigerator should be cleaned regularly (at least twice a year). When cleaning the refrigerator, first cut off the power, use a soft cloth dipped in water or dish soap, scrub gently, and then dip it in water to wipe off the dish soap.

2. In order to prevent damage to the outer coating of the box and the plastic parts inside the box, do not use washing powder, detergent, alkaline detergent, Tianna water, boiling water, oil, brushes, etc. to clean the refrigerator.

3. When the refrigerator is not used for a long time, the power plug should be unplugged, the inside of the box should be wiped clean, and the door of the box should be closed after the box is fully dried.

Introduction to the refrigeratorRefrigerator is a kind of appliance that can keep the temperature low, so that food or other items can be kept for a longer time, whether it is a family, a restaurant, a store, etc., and now there are many types of refrigerators, and different types of refrigerators have different refrigeration principles.

The refrigeration principle of the refrigeratorFor example, the common compression refrigerator is based on the principle that the motor provides mechanical energy and works on the refrigeration system through the compressor. The refrigeration system uses a refrigerant with a low boiling point to evaporate and absorb heat for refrigeration. There is also a semiconductor refrigerator, the principle of which is to use the principle of direct current to the PN-type semiconductor to produce the Peltier effect on the junction to achieve cooling.

When the temperature in the compressor is lower than the critical temperature of the refrigerant to reach the required pressure, the refrigerant will be liquefied, and a large amount of heat is emitted into the air during the liquefaction process. <

This is a process of energy conversion, the refrigerant can absorb heat and evaporate into gas under certain pressure conditions, when the temperature in the compressor is lower than the critical temperature of the refrigerant to reach the required pressure, the refrigerant will be liquefied, and a large amount of heat is emitted into the air during the liquefaction process, at this time, the temperature of the liquefied refrigerant is reduced, and the buffer is again sent to the steaming chamber to continue to evaporate, reabsorb a large amount of heat, and reduce the temperature around the evaporator. To put it simply, the refrigerant evaporates and absorbs heat, and then liquefies**, and then evaporates and absorbs heat again.

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. 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.

Different types of refrigerators have different refrigeration principles. The gas compression type electric pulse refrigerator uses a refrigerant with a low boiling point to absorb heat during evaporation and vaporization to achieve the purpose of refrigeration, and then evaporates and compresses it with a compressor to release heat and liquefy, so as to complete the refrigeration cycle. The gas-absorbing refrigerator uses a mixed solution of ammonia-water-hydrogen to achieve refrigeration in a continuous "absorption-diffusion" process.

Chemical refrigerators use certain chemicals when they are dissolved in water to absorb heat strongly and achieve a refrigeration effect.

Semiconductor refrigerators use semiconductor materials to generate the Pearl-dominant effect to work, that is, p-type semiconductors and n-type semiconductors are used to make galvanic couples, and after direct current is turned on, heat release and heat absorption are generated at the nodes, so as to achieve the purpose of refrigeration.

Types of refrigerators and corresponding refrigerator refrigeration principles:

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 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.

2.Absorption refrigerator:

This type of refrigerator can use heat sources (such as gas, kerosene, electricity, etc.) as power. The ammonia and hydrogen mixed solution are 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 refrigerators:

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 vibrating 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, radiant refrigeration refrigerators, solid refrigeration refrigerators. Detailed explanation of the principle of refrigerator refrigeration.

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 cools, the refrigerant liquefies into a liquid form (purple) and flows through the safety valve.

3.As 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 absorbs heat and exerts a cooling effect.

5.The coils inside the refrigerator help the refrigerant absorb the heat and keep the inside of the refrigerator cold. Then, repeat the cycle.

The compressor of the refrigerator sucks in the low-temperature, low-pressure refrigerant vapor in the evaporator for compression, and the refrigerant releases a large amount of heat after liquefaction, which is dissipated into the air through the heat pipe and heat sink. After the liquefied refrigerant dissipates heat, it enters the evaporator through the buffer and then through the air pipe, and the refrigerant evaporates in the evaporator to absorb a large amount of heat, and the temperature around the evaporator is rapidly reduced. So as to achieve the refrigeration effect.

Compression refrigerator: It is made by compressing the refrigeration system, which uses the principle that the refrigerant below the boiling point is turned into steam in the evaporator for heat absorption.

Absorption refrigerator: This kind of refrigerator can use the electric heating element as the power, and use the mixed solution of ammonia and hydrogen to continuously absorb heat for diffusion to the purpose of refrigeration, its refrigeration efficiency is low, and the cooling speed is relatively slow.

Semiconductor refrigerator: It is the use of pn-type semiconductors through the utility of direct current on the node, and the principle of the Peltier effect is used to realize the refrigeration of the refrigerator.

The refrigerator is a more commonly used electrical appliance that can be used to keep food fresh. So what is the principle of refrigerator refrigeration? Let's take a look.

In general, the refrigeration principle of the refrigerator is that the evaporator absorbs the refrigerant and then sends the compressed refrigerant into the condenser, and the condenser sends the liquefied refrigerant into the evaporator through or with capillaries for evaporation and heat absorption, so as to achieve the purpose of refrigerator refrigeration.

The refrigeration process is roughly as follows:

The compressor compresses and heats the refrigerant gas and passes it through a disc-shaped condenser. The gas will condense into a liquid state in the condenser tube, and at the same time dissipate the heat and become a condensed liquid in a high-pressure state; The condensate flows through the expansion valve and enters the evaporator after the pressure is lowered, where the low-pressure refrigerant liquid absorbs the heat inside the refrigerator (endothermic refrigeration) and converts it into a low-pressure gas. The refrigeration gas flows into the compressor again and starts the next refrigeration process, forming a complete self-circulating refrigeration system.