A clear idea of \u200b\u200bthe device and processes occurring inside the refrigeration unit helps extend the service life of the equipment. Understand the principle of the refrigerator is easy. In any model, it consists in the formation of a cold medium by absorbing heat in the inside of the object and its subsequent removal beyond the device.

All about how refrigerators work with a different principle of action, you will learn from the articles submitted by us. We will tell about the features of the device and related rules of operation. Our tips will help protect refrigeration machines from premature breakdowns, and you will get rid of the need to repair.

Refrigeration equipment is used in many areas of activity. Without it, it is not necessary to do in everyday life and it is impossible to present the full work of production shops at enterprises, shopping areas, catering institutions.

Depending on the target purpose and application area, several basic types of devices are distinguished: absorption, vortex, thermoelectric and compressor.

The compressor type is most common, so consider it in detail in more detail in the next section. Now let's designate the main differences between all 4 constructions.

Operation of absorption technology

In the system of absorption type settings, two substances are circulated - refrigerant and absorbent. The refrigerant functions typically perform ammonia, less often - acetylene, methanol, freon, lithium bromide solution.

The absorbent is a liquid that has sufficient absorption capacity. It may be sulfuric acid, water, etc.

All the operation of the equipment is based on the principle of absorption implying the absorption of the same substance to others. The design consists of several leading nodes - evaporator, absorber, capacitor, adjusting valves, generator, pump

The system elements are connected by tubes, with which a single closed circuit is formed. Cooling cameras occurs due to thermal energy.

The process is carried out as follows:

• the refrigeration agent dissolved in the liquid penetrates the evaporator;
• the concentrated solution is highlighted boiling with 33 degrees of ammonia pairs, cooling object;
• the substance passes into the absorber, where the absorbent is absorbed again;
• the pump pumps the solution into the generator heated by a specific heat source;
• the substance boils and the allocated ammonia couples go to the condenser;
• the refrigerant cools and is converted into a liquid;
• the working fluid passes through the regulating valve, compressing and sent to the evaporator.

As a result, ammonia, circulating in a closed loop, takes heat from a cooled chamber, entering the evaporator. And gives it to the external environment, being in the condenser. Cycles are reproduced non-stop.

Since the unit cannot be turned off, it is not a very econner and is distinguished by increased energy consumption. If such equipment fails, to repair it, most likely it will not work.

The dependence of the absorption devices from voltage drops, current and other power grid parameters is minimal. Compact dimensions allow you to easily install them on any convenient area.

There are no bulky moving and driving elements in the design of the devices, so they have a low noise level. Devices are relevant for buildings, the electrical network of which is subjected to constant peak loads, and places where there is no constant power supply.

The principle of absorption is implemented in industrial refrigeration units, small refrigerators for cars and office space. Sometimes it is found in separate household models operating on natural gas.

The principle of operation of thermoelectric models

The decrease in temperature in the thermoelectric refrigerator chamber is achieved using a special system that pumps heat according to the Peltier effect. It implies the absorption of heat in the connection area of \u200b\u200btwo different conductors at the time of the electric flow through it.

The design of refrigerators consists of thermoelectric elements in the form of a cube made of metals. They are combined with one electrical circuit. Together with the movement of the current from one element in another moves and heat.

The aluminum plate absorbs it from the inner compartment, and then transmits cubic working parts, which, in turn, redirect to the stabilizer. There, thanks to the fan, it is thrown out. For this principle, portable and bags with a cooling effect are operating.

In most models of thermoelectric refrigeration instruments, when switching the polarity of the power can not be obtained not only cold, but also heat - up to 60 degrees Celsius. This feature is applied to heating products.

This equipment is used in campsite, in the field of arrangement of passenger cars, yachts and motor boats, is often placed on dachas and in other places where it is possible to provide a power supply device with a voltage in a network of 12 V.

In thermoelectric articles there is a special emergency mechanism that disables them in case of overheating of working parts or ventilation system failure.

The advantages of this method of work include high reliability and rather low noise levels during the operation of the instruments. Among the disadvantages - high cost, sensitivity to external temperatures.

Features of equipment on vortex coolers

In the instruments of this category there is a compressor. It squeezes air, which is further expanding in the installed blocks of vortex coolers. The object is cooled due to a sharp expansion of compressed air.

Vortex devices are durable and safe: they do not need electricity, do not have moving elements, do not contain hazardous chemical compositions in the internal design system

The method of vortex coolers did not receive a wide distribution, but limited to test samples. This is due to the extensive air flow, a very noisy work and a relatively low cooling capacity. Sometimes devices are used in industrial enterprises.

Overview of compressor technology

Compressor refrigerators are the most common type of equipment in everyday life. They are almost in every home - they consume not too much energy resources and safely in operation. The most successful models of reliable manufacturers serve their owners for more than 10 years. Consider their structure and principles by which they work.

Features of the internal device

The classic household refrigerator is a vertically oriented cabinet equipped with one or two doors. Its housing is made of rigid sheet steel with a thickness of about 0.6 mm or durable plastic, facilitating the weight of the carrier structure.

For high-quality sealing, the product is used by a step with a high chlorvinyl resin. The surface is ground and covered with high-quality enamel from the paintopult. In the production of internal metal compartments, the so-called method of stamping, plastic cabinets are made according to the method of vacuum molding.

The instrument doors consist of steel sheets. On the edges, a dense rubber seal is inserted, which does not transmit outer air. In some modifications, magnetic shutters are embedded

Between the inner and outer wall, the product is sure to lay a layer of thermal insulation, which protects the chamber from heat trying to penetrate the environment, and prevent the loss of the cold formed inside the cold. For these purposes, mineral or glass felt is well suited, expanded polystyrene foam, polyurethane foam.

The inner space is traditionally divided into two functional zones: refrigeration and freezer.

The layout form differences:

• one-;
• two-;
• multi-chamber devices.

A separate look is highlighted, including two, three or four chambers.

Single-chamber units are equipped with one door. In the upper part of the equipment, the freezer compartment is placed with its own door with a folding or opening mechanism, in the lower - refrigeration department with height adjustable shelves.

The chambers establishes lighting equipment with a LED or a conventional incandescent lamp in order to see that, in fact, in the refrigerator lies.

The devices made by the type "side by side", much more and wider than college. Both compartments in them occupy space over the entire height of the equipment. They are located in parallel to each other.

In two-chamber units, internal cabinets are isolated and separated by each one's door. The location of the departments in them may be European and Asian. The first option involves the lower layout of the freezer, the second - the top.

Components of design elements

Compressor refrigeration units do not produce cold. They cooled the object by choosing the inner heat and turn it out.

The process of education of the cold proceeds with the participation of the following nodes:

• cooling agent;
• capacitor;
• evaporative radiator;
• compressor device;
• thermostatic valve.

In the role of refrigerant, which fill the refrigerator system, perform various grades of freon - a mixture of gases with a high flow rate and rather low boiling / evaporation temperature. The mixture moves along a closed loop, transferring heat to various sections of the cycle.

In most cases, the manufacturers use Freon 12 as a working element for home refrigeration machines. This colorless gas with hardly with a tangible specific smell is not poisons for a person and does not affect the taste and properties of products stored in cameras

Compressor - Central part of the design of any refrigerator. This is an inverter or linear unit provoking the forced gas circulation in the system, bent pressure. Simply put, squeezes Freon's pair and makes them move in the right direction.

The technique can be equipped with one or two compressors. Vibrations arising when working, absorbs an external or inner suspension. In models with a pair of compressors for each camera, a separate device is responsible.

The classification of compressors is provided by two subtypes:

1. Dynamic. Forcing the refrigerant to move from the strength of the movement of the vocabuses of a centrifugal or axial fan. It has a simple structure, but due to low efficiency and rapid wear under the action of torque in household equipment, it is rarely used.
2. Volume. Squeezes the working body using a special mechanical device that is started by the electric motor. It happens piston and rotary. Basically, these compressors are installed in the refrigerators.

Piston apparatus It is represented in the form of an electric motor with a vertical shaft concluded in a solid metal casing. When the starter relay connects the power, it activates the crankshaft, and the piston fixed on it starts moving.

The operation connects the system of opening and closing valves. As a result, the freon pairs are pulled out of the evaporator and injected into the condenser.

In case of breakdowns of the piston compressor, the repair is possible only under the condition of the use of specialized professional equipment. Any disassembly in the household setting is fraught with loss of tightness and the impossibility of further operation

In rotary mechanisms, the required pressure is maintained by two rotors moving towards each other. Freon enters the upper pocket, located at the beginning of the shaft, compressing and comes out through the bottom hole of a small diameter. To reduce friction, oil is injected into the space between the shafts.

Condencators Performed in the form of a snake grid, which is fixed on the back or side wall of the equipment.

They have a different design, but are always responsible for one task: cooling of hot gas vapors to the specified temperature values \u200b\u200bby condensation of the substance and dispersion of heat indoors. There are shield or ribbed tubular.

The evaporator consists of a subtle aluminum pipeline, soldered steel plates. It is in contact with the inner compartments of the refrigerator, effectively removes the absorbed heat from the instrument and significantly reduces the temperature in the cabinets

Thermostatic valve Need to maintain the pressure of the working fluid at a certain level. Large assemblies of the unit are associated with each other system of tubes forming a hermetic closed ring.

The sequence of the working cycle

The optimal temperature for long-term storage of provisions in compression devices is created during the working cycles that are carried out one by one.

They proceed as follows:

• when the apparatus is connected to the mains, the compressor is launched, compressing the freon pair, synchronously increasing their pressure and temperature;
• under the force of overpressure, the hot working body in the gas aggregate state falls into the capacitance of the capacitor;
• moving along a long metal tube, steam ejects the accumulated heat into an external environment, smoothly cools to room temperature values \u200b\u200band turns into a liquid;
• the liquid working body passes through a filter-desiccant, absorbing excess moisture;
• the refrigerant penetrates through a narrow capillary tube, at the exit of which reduces its pressure;
• the substance cools and is converted to gas;
• chilled steam gets to the evaporator and, passing through its channels, takes heat from the internal compartments of the refrigeration unit;
• freon temperature rises, and it goes back to the compressor again.

If we speak simple words about how the compressor refrigerator works, the process looks like this: the compressor distingizes the refrigerant over a closed circle. Freon, in turn, changes the aggregate status thanks to special devices, collects heat inside and transfers it out.

The operating cycle in the system is repeated until the temperature values \u200b\u200bspecified by the system programs are reached and renewed again when their increase is recorded.

After cooling to the desired parameters, the thermostat stops the motor, blurring electrical circuit.

When the temperature in the chambers begins to increase, the contacts are closed again, and the compressor electric motor is activated. That is why during the work of the refrigerator constantly it appears, then the hum of the motor subsides again.

There is nothing complicated in the operation of the equipment: it functions automatically around the clock. The only thing that needs to be done when you first turn on and periodically adjust in the process of work is to establish the optimal temperature in specific circumstances.

The desired temperature is set. In the electromechanical system, the values \u200b\u200bare set on the eye or taking into account the recommendations specified in the manufacturer's instructions. This should take into account the type and number of products stored in the refrigerator.

The knob of the regulator, as a rule, is a round mechanism with multiple divisions, or, in models more than more than and more expensive, control can be carried out using the touch panel.

In order to assess the degree of frost, experts advise at first put the regulator in the middle position, and after some time, if necessary, tweak it to the right or left

Each mark on such a handle corresponds to a specific temperature regime: the more division, the lower the temperature. The electronic unit also allows you to set the temperature with a maximum accuracy of 1 degree using a rotary regulator or buttons.

For example, set -14 degrees in the freezer compartment. All entered parameters will be displayed on a digital display.

To maximize the life of the home refrigerator, it should be not only able to deal with its device, but also to care for him competently. The lack of due service and improper exploitation can lead to rapid wear of important details and defective functioning.

Avoiding unwanted consequences, adhering to a number of rules:

1. Regularly clean condenser From dirt, dust and cobwebs in models with an open metal grid on the back wall. To do this, use the usual slightly moistened rag or vacuum cleaner with a small nozzle.
2. Completely install techniques. It is easy to ensure that the distance between the capacitor and the wall of the room is at least 10 cm. Such a measure will help ensure the unhindered circulation of air masses.
3. Timely defrost, not allowing the formation of an excessive layer of snow on the walls of the chambers. At the same time, to eliminate ice crusts, it is forbidden to go into the course of knives and other sharp items that can easily damage and disable evaporator.

It should also be borne in mind that the refrigerator cannot be placed next to heating devices and in places where direct contact with sunbeams is possible. The excessive effect of external heat does not affect the operation of the main nodes and the overall productivity of the device.

To clean the fragments of the product made of stainless steel, only special funds recommended by the manufacturer are suitable for the instructions for the instructions.

If transportation is planned from place to place, it is best to transport equipment in a cargo car with a high van, fixing it in a strictly vertical position.

Thus, it is possible to prevent breakdowns, leaking oil from the compressor that falls directly into the circuit circuit of the cooling agent.

Conclusions and useful video on the topic

Video # 1. How the refrigeration unit works:

Video # 2. Detailed explanation of the device of compression refrigerators:

Video # 3. Information about the operation of absorption machines:

While the refrigeration equipment works properly, consumers rarely are interested in its device. However, these knowledge should not be neglected. They are very valuable because they allow you to quickly determine the cause of the breakdown and detect a problem space, preventing serious malfunctions.

Please leave comments, place thematic photographs, ask questions on the topic of the article below the block. Tell us about how they were sacrificed in the device of your own refrigerator. Share how in practice we used knowledge about the design of the refrigeration machine.

Information about the basic principles of the refrigeration equipment will help you use its capabilities most fully, while maintaining its working capacity for a long time.

The device of the largest amount of refrigeration machines is based on a compression cooling cycle, the main structural elements of which are - , I. flood regulator (thermostatic valve or capillary tube) connected by pipelines and represent a closed system in which the circulation of refrigerant (freon) performs a compressor. In addition to providing circulation, the compressor supports in the condenser (on the injection line) and high pressure, about 20-23 atm.

Cooling in the refrigeration machine is provided by continuous circulation, boiling and refrigerant condensation in a closed system. The boiling of the refrigerant occurs at low pressure and low temperature. The steamy refrigerant is absorbed by the compressor, and is fed into the condenser, the refrigerant pressure rises to 15-20 atm., And its temperature rises to 70-90? P.

Passing through the capacitor, the hot vapor refrigerant is cooled and condensed, i.e. it goes into the liquid phase. The capacitor can be either air cooled or water-cooled - depending on the type of refrigeration system.

At the outlet of the condenser, the refrigerant is in a liquid state at high pressure. The dimensions of the capacitor are chosen in such a way that the gas is completely condensed inside the condenser. Therefore, the temperature of the fluid at the outlet of the condenser is slightly lower than the condensation temperature. The supercooling in air-cooled capacitors is usually about 4-7? P. In this case, the condensation temperature is about 10-20? From above the temperature of atmospheric air.

The refrigerant in the liquid phase at high temperature and pressure enters the flow regulator, where the mixture pressure decreases sharply - part of the fluid can evaporate, turning into a vapor phase. Thus, a mixture of steam and liquid falls into the evaporator. Liquid boils in an evaporator, taking the heat from the surrounding air, and again goes into a vapor state.

The dimensions of the evaporator are chosen in such a way that the fluid in it completely disappear. Therefore, the temperature of the steam at the outlet of the evaporator turns out to be higher than the boiling point - the so-called refrigerant overheating in the evaporator occurs. In this case, even the smallest droplets of the refrigerant, and liquid does not fall into the compressor.

It should be noted that in the case of a liquid refrigerant hitting the compressor - the so-called hydraulic impact - Damage and damage to valves and other components of the compressor are possible. For air-cooled capacitors, the overheating value is 5-8? P. Superheated steam comes out of the evaporator, and the cycle is renewed.

Thus, the refrigerant is constantly circulating on a closed contour by changing its aggregate state from liquid to vapor-shaped and vice versa. Despite the fact that there are many types of compression refrigeration machines, the scheme of the cycle in them is almost the same.

We describe the device of individual units, nodes and parts of refrigeration equipment:

UNIT

The refrigeration unit consists of the following main parts and nodes: compressor, receiver, capacitor, evaporator, thermostatic valve (TRV) ,.

Refrigeration units are available on the basis of hermetic, shielded, semi-hermetic and gland compressors. According to its constructive execution, the compressors used in the refrigeration units are divided into two main categories: piston and rotary, spiral, screws.

The fundamental difference between rotational, spiral and screw compressors from piston lies in the fact that the suction and compression of the refrigerant is carried out not due to the reciprocating movement of the pistons in the cylinders, and due to the rotational motion of the plates, spirals and screws.

IN sealed Compressors The electric motor and compressor are located in a single hermetic case. Such compressors are widely used in refrigeration machines of small and medium capacities and in domestic air conditioners. The advantage of hermetic aggregates is their relatively low cost and a smaller level of noise. The disadvantage is the impossibility of repairing the compressor, even with minor damage, for example, when the valve fails.

In the shielded compressors, the stator of the electric motor is made from the phone-oil medium. The units of this type are less sensitive to the presence of moisture in the refrigeration circuit and, it is important, all the work on the installation and replacement of the stator of the compressor electric motor during its combustion to produce at the place of operation, not violating the tightness of the entire system.

IN semi-hermetic Compressors The electric motor and compressor are located in a single collapsible case. These compressors are produced in different power, which allows them to be used in medium and high power units. The advantage is the ability to repair and reliability in work, disadvantage - high compared to hermetic compressors. Increased noise and need for maintenance.

IN salnikov Compressors electric motor is located outside. The compressor shaft through the glands is removed outside the housing and drives the electric motor using the belt transmission. Such a design contributes to increased refrigerant leakage through the gland seals and requires regular maintenance.

Currently, aggregates on the basis of gland compressors for trading equipment are practically not available. There are no advantages in designs with gland compressors at the moment, the repair of such refrigeration machines is distinguished by low reliability.

The capacitor is a heat exchange unit that transmits the thermal energy of the refrigerant environment. In refrigeration units for commercial equipment, air cooling capacitors are most often used. Compared with water cooling capacitors, they are more economical in operation and easier to operate.

The capacitor can be mounted on the frame of the unit or be installed separately from it. The advantage of the remote capacitor is that it is less demanding on air temperature in the engine room and practically does not require additional ventilation in the engine room.

As a rule, the air capacitor for refrigeration or freezer is installed in the outdoor. But, despite the advantage of the remote capacitor, during the operation of the refrigeration unit in the winter period there are certain problems:

• the ability to damage the compressor when starting;
• the risk of liquid refrigerant to enter the compressor;
• the frost of the heat exchanger during long work;
• reducing cooling capacity.

To eliminate these reasons, an additional automatic set is used: pressure switch or electric motor rotation regulator, differential valve, check valve and condensation pressure regulator.

Receiver

The receiver is a reservoir serving to collect a liquid refrigerant in order to ensure its uniform entry to the thermostatting valve and in the evaporator. In small cooling machines, the receiver is designed to collect the refrigerant during the repair of the machine, as well as for cooling the gas and the separation of oil drops and moisture.

The evaporator is a device in which the liquid refrigerant boils at low pressure, removing the heat from the cooled objects (products). The lower the pressure supported in the evaporator, the lower the temperature of the boiling refrigerant. The boiling point is usually supported by 10-15 ° C below the air temperature in the chamber. The air temperature in the chamber depends on the type of cooled product. The evaporator can be located directly in the cooled volume (camera, cabinet) or be outside it.

In accordance with this, for the purpose, evaporators differ for direct cooling of the medium and evaporators to cool the intermediate coolant (water, brine, air, etc.). The design of the evaporator depends on the type of cooling medium, the necessary cooling capacity, the properties of the refrigerant itself. As a rule, these are lamellar heat exchangers with copper or aluminum tubes and ribs from aluminum, copper or galvanized steel.

Thermostatic valve

The thermostatic valve (TRV) is installed in the discharge highway before the evaporator and ensures the filling of the evaporator with a liquid refrigerant at optimal limits. Excess refrigerant in the evaporator may result in a refrigerant liquid phase compressor, which will lead to a compressor breakdown. The lack of refrigerant in the evaporator sharply reduces the efficiency of the evaporator.

Drainage cartridges are designed to purify the refrigerant circulating the refrigerant system from mechanical particles and moisture. Often, drainage cartridges are used to reduce the acidity of the medium within the refrigeration unit system. Drainaged cartridges can be installed on both the discharge highways and the suction side.

Air cooler

Air cooler is a device for cooling the air inside the cooled volume. Consists of an evaporator and fan (fans). Runs the cooled air through the evaporator and sends to cooled products.

Monoblock

Machine refrigerated monoblock (monoblock) is designed to create an artificial cold in the commercial refrigeration equipment. A feature of the monoblock is that it does not require the installation of individual nodes at the site of operation, and simply mounted on the refrigeration chamber. Unlike split systems, the monoblock has a smaller cost with the same parameters.

This is a device for disconnecting and turning on the compressor in order to maintain a certain temperature in the cooled volume. Electronic thermostats are based on the principle of thermocouples, where the electronic device - depending on the resistance of the temperature sensor, controls the time of operation of the compressor.

Electromechanical thermostats operate on the principle of expansion of the bellows harmonic, filled with a refrigerant. When cooled, the pressure inside the bellows decreases, the bellows harmonic is compressed and the contacts through which the compressor feeds is swapped. When heated, everything occurs in the reverse order.

Refrigerents

Refrigerators are working substances of steam refrigeration machines, with which low temperatures are provided.

Coldon-12 (R.-12) it has a chemical formula CHF 2 C1 2 (Diftorudichloromethane). It is a gaseous colorless substance with a weak specific smell, which begins to be felt with the volumetric content of its vapor in the air over 20%. Cladon-12 has good thermodynamic properties

Cladon-22 (R.-22) , or diphther monochloromethane (CHF 2 C1), as well as chladone-12, has good thermodynamic and operational properties. It is characterized by a lower boiling point and a higher wall of vaporization. The bulk cooling capacity of chladone-22 is approximately 1.6 times more than Coldone-12.

To navigate when the kitchen equipment fails, many housewives are forced to understand in the principle of operation of many devices, such as: electric stove, microwave, refrigerator and others. The main function of the refrigerator is the preservation of nutritional products in the fresh state, so it should work constantly, and the services of a repair specialist cannot be used instantly. Understanding how the refrigerator works will help save financial and temporary resources, and many malfunctions can be repaired with their own hands.

Interior refrigerator device

Everyone knows how the refrigerator works, simple words - this equipment freezes and cools a variety of products, allowing you to avoid their damage for some time.

At the same time, not everyone knows certain features of this device: from which the refrigerator consists of where the cold is taken in the inner plane of the chamber, as it is created by the refrigerator and why the device is turned off from time to time.

To understand these issues, it is necessary to consider in detail the principle of operation of the refrigerator. To begin with, we note that the cold air masses arise not themselves: a decrease in air temperature is carried out inside the chamber during the functioning of the unit.

This refrigeration equipment includes several main parts:

• refrigerant;
• evaporator;
• capacitor;
• compressor.

Compressor is a kind of heart of any refrigeration unit. This element is responsible for circulating the refrigerant for a large number of special tubes, some of which is located behind the refrigerator. The remaining parts are disguised in the inside of the chamber under the panel.

When working, the compressor, like any motor, is subjected to significant heating, so it needs some time for cooling. In order for this unit to not lose performance due to overheating, a relay discharged into it, opening the electrical panel at certain temperature indicators.

The tubes located on the outer surface of the refrigeration equipment is a condenser. It is intended for the release of thermal energy outward. Compressor, carrying out the refrigerant pumping, sends it inside the capacitor by means of high pressure. As a result, the substance with the gaseous structure (isobutane or freon) becomes liquid and begins to heat up. Excessive heat dissipated in the room so that the refrigerant cooling occurred naturally. It is for this reason that it is forbidden to install heating appliances next to the refrigerators.

The owners who know about the principle of operation of the refrigerated cabinet, try to arrange their "kitchen assistant" the most optimal conditions for cooling the capacitor and compressor. This allows you to extend the life of its operation..

To obtain a cold in the inner chamber there is another part of the pipe system into which the liquefied gaseous substance is sent after the condenser - it is called the evaporator. This element is separated from the condenser with a drying filter and capillary. Cooling pricing inside the chamber:

• Hovering in the evaporator, Freon begins to cry and expand, again transforming into the gas. In this case, the absorption of thermal energy is carried out.
• The tubes in the chamber are cooled not only the air mass of the unit, but also cooled themselves.
• The refrigerant is then sent to the compressor again, and the cycle is repeated.

In order for nutrient foods not beyled inside the refrigerator, the thermoregulator is built into the equipment. A special scale makes it possible to set the desired degree of cooling, and after reaching the desired values, the equipment is automatically turned off.

Single-chamber and two-chamber models

The unit, cooling air, in each refrigerator has a general principle of the device. However, differences in the functioning of different equipment are still available. They are based on the features of the refrigerant movement in refrigerated cabinets with one or a pair of cameras.

The scheme that was presented slightly higher is characteristic of the models of a single-chamber type. Regardless of the location of the evaporator, the principle of functioning will be united. However, if the freezer is located under or over the cooling compartment, then an additional compressor is required for stable and full operation of the refrigerator. For the freezer, the principle of operation will be the same.

The cooling compartment in which the temperature indicators do not fall below the zero mark, it is started only after the freezer cooled sufficiently and turned off. In this moment, the refrigerant of the freezer system is sent to the chambers with a positive temperature, and the evaporation / condensation cycle is already at a lower level, therefore it is impossible to say for sure how much the refrigeration equipment needs to be developed before automatic shutdown. It all depends on the adjustment of the thermoster and the freezing chamber volume.

Function fast frost

This function is characteristic of two-chamber refrigerators. In this mode, the refrigerator can continuously work long enough. Fast frost is designed to efficiently freeze products in large volumes..

After activating the option, special LED indicators are ignited on the panel, showing that the compressor is running. Here it is necessary to take into account the fact that the functioning of the unit will not be stopped automatically, and too long the operation of the refrigerator can negatively affect its condition.

After manually disconnecting the installation, the indicators themselves go out, and the compressor drive will turn off.

Modern refrigerators are equipped with a large number of various functions. And today housewives are aware of the existence of the automatic defrost function. The immeasant and drip refrigeration systems made human life much easier, but the principle of the refrigerator remained the same.