RU2513416C2 - Method of operating household refrigerator and household refrigerator that implements this method - Google Patents

Abstract

FIELD: personal use articles.

SUBSTANCE: refrigerator comprises at least the first and the second chambers for storing food products and a refrigeration circuit for cooling the said chambers, which comprises at least one compressor. In the chambers different temperatures are maintained: in the first chamber, which is a cooling chamber, a higher temperature is maintained, and in the second chamber, which is a freezing chamber, a lower temperature is maintained. The method comprises the following steps: b) switching off the compressor for a time period, c) discharge of the cold air flow from the freezing chamber and feeding it into the cooling chamber for maintaining the temperature of the latter within a temperature range defined by the first and second limit values (T_fmin, T_fmax). The time interval, during which the compressor is switched off, is such that the temperature in the freezing chamber does not exceed the third predetermined limit value (T_sup).

EFFECT: use of this group of inventions enables to increase the time, during which the compressor is disconnected.

25 cl, 3 dwg

Description

The invention relates to a method for operating a domestic refrigerator and a domestic refrigerator implementing this method.

The term "domestic refrigerator", as used in the description of the claims, refers to refrigerators containing a first refrigerating chamber, which is usually maintained at a temperature in the range from 0 ° C to 12 ° C (usually called a "refrigerating chamber"), and a second refrigerating chamber, which maintains a lower temperature between -12 ° C and -35 ° C (commonly called a “freezer”).

In addition, the invention, in particular, relates to refrigerators with a frost prevention system in which food products in both chambers are cooled by cold air supplied by a forced ventilation system. The circulating air is cooled by an evaporator-type heat exchanger or evaporator by heat exchange with a cooler refrigerant circulating in the refrigeration circuit, which contains at least one compressor, one evaporator and one throttle valve.

The household refrigerator described above with a frost prevention system during operation usually creates noise caused mainly by two components: a compressor and a forced ventilation fan. Of these two components, the compressor is more noisy (in the sense of noise produced in the area where the refrigerator is installed), since the fan is installed inside the refrigerator next to the cold air supply channels to the chambers.

During normal operation of the refrigerator, the compressor starts every time when cold air is required to maintain the set temperature in the chambers. The tests showed that the frequency of turning on the compressor in the refrigerator with an outside temperature of 25 ° C and with closed chamber doors is approximately thirty minutes of continuous operation per hour. Thus, it can be easily understood that the compressor switching frequency is a noise source, especially in situations where the need for noise reduction is especially necessary, for example at night.

Some solutions are known, for example, from document KR 2001-0081331 in the name SAMSUNG ELECTRONICS CO LTD, in which, to reduce the noise produced by the refrigerator at specified time periods, the compressor operating parameters are changed using a timer or a brightness sensor.

However, this solution is not optimal, because the compressor still needs to be turned on, albeit in lighter operating conditions, in order to maintain the specified operating temperature in the chambers, as a result, complete or almost complete silence is not achieved (as required, for example, when the refrigerator needs to be installed near the bed in a one-room or two-bedroom apartment).

The objective of the invention is to eliminate these and other disadvantages of known systems using the method of operation of household refrigerators according to paragraph 1 of the claims.

The invention also relates to a domestic refrigerator that implements the specified method.

The invention is based on the idea of using a freezer (i.e., a chamber with a lower temperature than in the refrigerator) to select and supply air to the refrigerator (operating at a higher temperature) in order to maintain the latter at a given and possibly constant temperature at the compressor off after the temperature in the freezer has been brought to a value below the normal operating temperature. This condition does not affect the quality of storage of food products stored in such a chamber.

This allows the compressor to remain off for a long time, from about three to eight hours in a row, thereby eliminating the noise associated with compressor operation.

Features and advantages of the invention will be more apparent from the description of its implementation with reference to the attached drawings.

Figure 1 shows a household refrigerator;

figure 2 - diagram of the method of operation of the refrigerator in accordance with the present invention;

figure 3 - graphs of temperature changes over time in the refrigerator and freezer during the working cycle according to the invention.

Figure 1 shows a refrigerator 1 with a frost prevention system comprising a refrigerator 2 and a freezer 3, which is in fluid communication with the evaporator 4 of the refrigeration circuit and fan 5. The air distributed by the fan 5 is cooled by blowing the evaporator 4, and then enters in the freezer 3 to freeze it. Next, air enters the refrigeration chamber 2 through the channel 6 to cool it, as well as remove moisture. In this case, air circulation can be provided by a second fan 12 installed at the end of the duct 6. However, it should be noted that the second fan 12 is optional and may be absent.

The air flow leaving the freezing chamber 3 and entering the refrigerating chamber 2 is controlled by a shut-off valve 8 installed in the channel 6 (usually called a “valve” by specialists in the art), which is shown here in its simplest form, i.e. like a shutter that overlaps the channel 6 in cross section.

If necessary, the position of the shut-off valve 8 may be different. It can be installed on any part of the channel 6, which supplies air from the freezer 3 to the refrigerator 2. For example, if the second fan 12 is absent, the shut-off valve can be installed in its place, i.e. in that section of the channel 6, which is closest to the refrigeration chamber 2.

The forced air circulation is such that the air leaving the refrigerating chamber 2 enters the freezing chamber 3 through an additional return channel (not shown for clarity), which communicates the refrigerating chamber 2 with the freezing chamber 3 through the fluid, so that the air is again cooled by the evaporator 4 and a new cycle begins.

Of course, the shut-off valve can also be installed in the return air channel, however, the characteristics of the specified return channel and its shut-off valve are not important for the essence of the invention and may vary depending on the specific design requirements.

A refrigeration circuit of a known type includes: an evaporator 4, a compressor 9, a throttle valve 10, a condenser 11 and all the corresponding connecting tubes (shown in dashed line in the drawing).

Figure 1 also shows the shelves 13, which are usually installed in chambers 2 and 3, doors 14 and 15 for closing these chambers, and two temperature sensors 17 and 18 installed in the refrigerating chamber 2 and in the freezing chamber 3, respectively, and made with the possibility of determining air temperatures, respectively, T _f and T _c , in these chambers.

Fans 5 and 12 and a shut-off valve 8 are each driven by an electric motor (not shown) under the control of a control unit (not shown), which receives data on temperatures detected by sensors 17 and 18 and accordingly controls the cooling cycle, for example, by controlling the operation of the compressor 9 .

The presence of an additional camera will not mainly affect the way the refrigerator 1 works.

During the normal duty cycle, data on the temperatures T _f and T _c determined by sensors 17 and 18, respectively, are entered into the control unit, and then the compressor 9, fans 5 and 12 (if any) and the shut-off valve 8 are controlled to maintain temperatures in both chambers 2 and 3 within the specified values. The average temperature in the refrigerator 2 is usually set in the range from 2 ° C to 12 ° C, and the average temperature in the freezer 3 can be from -18 ° C to -26 ° C, while in both chambers the temperature fluctuates from the average set value may be 4 ° C.

If during the normal operating cycle the sensors 17 and 18 determine the temperature increase in the refrigerating chamber 2 or in the freezing chamber 3, then the compressor 9 is started, the fans 5 and 12 are turned on and the shut-off valve 8 is opened (fully or partially) to cool the freezing chamber 3 and the direction part of the flow of cold air from it into the refrigerating chamber 2, thereby regulating their temperature.

It should be noted that during the normal duty cycle, the fans 5 and 12 are turned off, and the shut-off valve 8 is installed so that the channel 6 is open only when the compressor 9 is running; as soon as the latter is turned off, the fans 5 and 12 are turned off and the shut-off valve 8 closes the channel 6.

The method of operation according to the invention includes at least the following

stages:

b) shutdown of the compressor 9;

C) the selection of the flow of cold air from the freezer 3 and its supply to the refrigerator 2 to maintain the temperature within the specified minimum and maximum limit values T _fmin and T _fmax ,

wherein the compressor shutdown time interval 9 is such that the temperature in the freezer 3 does not exceed a predetermined limit value T _sup .

In this way, the temperature of the refrigerator 2 can be controlled by taking cold air from the freezer 3 without using the compressor 9, resulting in very quiet operation of the refrigerator 1.

The selection of the flow of cold air from the freezer 3 will inevitably lead to an increase in the temperature of the latter, therefore, the maximum limit temperature can be set higher than that at which the compressor 9 is turned on, completing the silent mode of operation.

To increase the period of quiet operation (i.e., with the compressor 9 turned off) of the refrigerator 1, before step b), step a) is carried out, at which the temperature of the freezing chamber 3 is lowered to a value T _inf that is lower than the normal operating temperature T _cn . This can be realized due to the fact that lowering the temperature in the freezer 3 below the normal operating temperature T _cn will not lead to a deterioration in the quality of the food stored in it, while at the same time cooling the air supplied from the freezer 3 to the refrigerating chamber 2 for a sufficient a long time until the temperature increase inside the freezer again requires the inclusion of compressor 9.

In particular, step a) is performed with the compressor 9 turned on for a longer time than usual, for example, if during normal operation the compressor remains on for about thirty minutes, then in this case it can operate continuously for preferably from sixty to one hundred and eighty minutes, so that the temperature in the freezer compartment 3 falls below the normal operating temperature T _cn (usually T _cn = -18 ° C), for example, to a value of T _inf in the range from -23 ° C to -26 ° C, i.e. 5-8 ° C below the temperature T _cn .

It should be noted that step a) can be performed using either the compressor operating time 9 or the temperature reached in the freezer 3 as a control value: these values are proportional, i.e. the longer the continuous operation of the compressor 9, the lower the temperature reached in the freezer 3. According to the invention, for performing step a), any solution can be selected, i.e. the compressor 9 can operate either a predetermined period of time, or until the temperature limit in the freezer 3 is reached.

After step a), regardless of the selected control value (working time or temperature in the freezer 3), the compressor 9 is turned off and the quiet mode of operation of the refrigerator 1 starts: in this case, the sensors 17 and 18 determine the temperatures T _f and T _c in both chambers 2 and 3 at predetermined time intervals (or continuously) and send the received data to the control unit.

Suppose that doors 14 and 15 remain closed, and two chambers 2 and 3 have optimal temperatures for a certain period of time due to the available gaskets and thermal insulation.

However, due to the heat exchange of the refrigerator 1 with the environment, the temperatures in both chambers 2 and 3 will start to rise again.

In particular, after a certain time, the temperature T _f in the refrigerator 2 rises above a predetermined limit value T _fmax (for example, T _fmax = 5 ° C); and the temperature T _c in the freezer 3, which during step a) became much lower than the normal working temperature (decreased to the value of T _inf ), will still remain for a long time below the set limit value T _sup , which can be chosen equal to the normal working temperature T _cn (i.e., T _sup = T _cn = -18 ° C).

When the control unit detects that the specified temperature limit T _fmax is exceeded in the refrigerator 2, it opens the shut-off valve 8 and turns on the fan 5, as well as the second fan 12 (if any) to perform step c), in which the flow of cold air is taken from the freezer 3 and is fed into the chamber with a higher temperature, i.e. into the refrigeration chamber 2, until the latter again reaches the set temperature, for example, equal to the lower limit value T _fmin, without the help of the compressor 9, which remains off.

Step c) may be repeated many times, at least until the temperature in the freezer 3 remains below a predetermined maximum limit value T _sup .

It should be noted that step c) can be performed continuously or by a certain number of repetitions. In the previously considered case, the shut-off valve 8 always remains at least partially open, and the fans 5 and 12 (if any) are turned on (can be turned on at different speeds of rotation) depending on the temperature values determined in the refrigerating chamber 2: if the temperature rises, the fan 5 and / or 12 is turned on, and the shut-off valve 8 can open a larger section of the channel 6 (to allow a greater flow of cold air) in order to reduce the temperature in the refrigerator 2. When the temperature in the latter becomes optimal, fan 5 and / or 12 is turned off (or similarly, its rotation speed is reduced to a minimum), but shut-off valve 8 remains open.

As a preferred alternative, step c) is performed by repeating the steps of opening the shut-off valve 8 and activating the fan 5 and / or 12 until the limit temperature T _fmin in the cooling chamber 2 is reached, after which the fan turns off and the shut-off valve 8 closes, as soon as the temperature in the refrigerator 2 reaches the set value.

In any case, when the sensor 18 determines that the temperature inside the freezer compartment 3 has reached or exceeded the maximum limit value (T _c ≥T _sup ), the quiet operation cycle ends and the compressor 9 turns on again.

It should be noted that under optimal conditions, i.e. when the temperature surrounding the refrigerator 1 is approximately 10 ° C and the doors 14 and 15 are closed, setting the limit values as follows:

T _inf = -24 ° C

T _sup = -18 ° C

T _fmin = 0 ° C

T _fmax = 4 ° C

it will be possible to stop the compressor 9 for periods of time up to eight hours, thereby achieving a significant improvement compared to the known solutions in which the compressor 9 should be turned on more often, although the operating conditions are easier.

Even in less favorable conditions, for example, when the ambient temperature is 35 ° C, it was found that this solution allows the compressor 9 to be left off for more than three hours, which leads to a certain improvement compared with known systems.

Of course, repeated openings of the door 15 of the freezing chamber 3 can greatly affect the operating time with the compressor 9 turned off. However, it is often required that the refrigerator work quietly at night, when the chambers of the refrigerator 1 open relatively rarely (or do not open at all), so this refrigerator works considered satisfactory.

A diagram of the method of operation according to the invention is shown in FIG. The duty cycle begins with the first stage of turning on the compressor 9, which runs for a given time (condition for a given time) or until the temperature in the freezer T _c drops and becomes substantially equal to the limit temperature T _inf (condition T _c = T _inf ), after which the compressor 9 turns off, and the shut-off valve 8 closes.

Next, the temperature T _f in the refrigerator 2 is determined. As long as it is below the maximum limit value T _fmax , no action will be taken.

When the temperature T _f rises above the maximum limit value T _fmax , the temperature T _c in the freezer 3 is checked. If it is lower than the upper limit value T _sup , the shut-off valve 8 will open and fan 5 or the second fan 12 (if any) will turn on in order to to direct the flow of cold air from the freezer 3 to the refrigerator 2, until the temperature T _f in the refrigerator 2 becomes equal to the lower limit value T _fmin at which the shut-off valve 8 closes and the fans (fan) 5 and 12 are turned off.

If after the temperature T _{f has} risen above the maximum limit value T _fmax , it turns out that the temperature T _c in the freezer 3 is higher than the upper limit value T _sup , then the cycle will be considered completed and compressor 9 will turn on, shut-off valve 8 will open, and fans 5 and 12 will turn on in order to restore the temperatures of the normal duty cycle.

Preferably, the temperature limits set for the refrigerating chamber 2 are equal to each other, i.e. T _fmin is equal to T _fmax .

In this case, the system will still work as described above, except that the temperature in the refrigerating chamber 2 will always be maintained substantially at about one set point, i.e. T _fmin = T _fmax .

It should be noted that this option also implies a change in the temperature limit values of the refrigerating chamber 2, since the compressor 9 operates continuously during the execution of step a). In the normal mode, as indicated above, the cooling of the refrigerator 2 is controlled so that the temperature of the latter fluctuates around 4 ° C from the set average value, and, conversely, during step a), the temperature of the refrigerator 2 is already set to T _fmin = T _fmax , i.e. a predetermined temperature limit value maintained during the next step c), thus, at the beginning of the latter, the temperature in the refrigerator 2 will already reach the value maintained during operation with the compressor 9 turned off.

The indicated temperature value T _fmin = T _{fmax is} achieved and maintained in the refrigerating chamber 2 by turning on the fan 5 and / or 12, as well as opening and closing the shut-off valve 8 to supply a variable flow of cold air to the refrigerating chamber 2 in order to bring it to the desired temperature T _fmin = T _fmax and maintain a given temperature value.

It is very important to emphasize that the solution proposed in this embodiment allows you to increase the time during which the compressor 9 remains turned off and cold air is taken from the freezer 3. In fact, the longer the instantaneous temperature inside the refrigerator 2 remains constant, the less energy should be used to maintain an average constant temperature and the longer the time during which the compressor 9 remains off.

This solution is shown in FIG. 3, where time (expressed in hours) is plotted on the abscissa axis and temperature is plotted on the ordinate axis. The upper beam of curves C1 shows the temperature change at different points inside the refrigerator 2, and the lower beam of curves C2 shows the temperature at different points inside the freezer 3.

As can be seen, in normal operation, a duty cycle is activated, which includes the steps of the method of operation according to the invention: during step a) described above, the compressor 9 is turned on for approximately 80 minutes, during which the temperature in the freezer 3 drops from its initial value (in a quiet state) normal operation) of approximately -18 ° C to a value of T _{inf of} approximately -25 ° C, as shown by the beam of C2 curves. During this period of time, the temperature in the refrigerator 2 also drops from a higher initial value to a value of about T _{fmax of} about 4 ° C, as shown by the beam of curves C1.

As soon as these values are achieved, stage b) of the above operation method starts, in which the compressor 9 is turned off and the shut-off valve is closed.

Then, for about four hours, the temperature in the refrigerating chamber 2 remains essentially constant (T _fmin = T _fmax ), approximately equal to 5 ° C, by performing step c) of the method, i.e. by supplying a stream of cold air from the freezer 3, the temperature of which, as shown by the beam of curves C2, rises to the limit value T _sup , at which stage c) ends and normal operation of the refrigerator 1 resumes.

It should be noted that the temperature T _inf can be generally any temperature below T _cn , although better results are achieved by setting the temperature below the temperature T _cn by 3-10 ° C, in particular 6 ° C.

More specifically, the limit value of T _fmin varies from 0 ° C to 2 ° C, the limit value of T _fmax varies from 4 ° C to 6 ° C, the limit value of TSUp varies from -20 ° C to -16 ° C , and the limit value T _inf varies from -24 ° C to -30 ° C, while the normal operating temperature of the freezer 3 is approximately -18 ° C.

As for the control performed by the user to start the method of operation described above, it can be carried out manually, semi-automatically and automatically.

In the first case (manual control), the user sets the time to start work (coincides with the beginning of stage a)) by simply clicking on the corresponding button.

In the second case (semi-automatic control), the user sets the time interval after which the refrigerator 1 should start to work in quiet mode. For example, the user may want the refrigerator 1 to start in quiet mode after four hours, which corresponds, as described above, to turn off the compressor 9 after a predetermined time interval. In this case, the control unit of the refrigerator 1 turns on the timer and monitors the execution of step a) until the time specified by the user so that the specified step is completed at the end of the selected time interval. It should be noted that this mode is especially convenient when the controlled value in step a) is the operating time of the compressor 9, and not the temperature reached in the freezer 3.

In the third case (automatic control), the user sets the time at which the quiet mode should begin (i.e., steps b) and c)): in this case, the control unit turns on the corresponding clock or timer and controls the execution of step a) in this way, that it ends at a user-specified time. In this case, it is also preferable to use the operating time of the compressor 9 instead of the temperature reached in the freezer 3 as a control value in step a).

The invention also relates to a refrigerator 1 shown in FIG. 1 and described with reference to FIG. 1, which is intended to carry out the method according to the invention.

As an option, it should be noted that in the refrigerator 1, the shelves 13 can be replaced with drawers or cameras. In addition, the shut-off valve 8 can be of any type (for example, throttle, sector and the like), provided that it is suitable for blocking the channel 6 in order to regulate the air flow passing through it.

In turn, the channel 6 may have a different design than the one illustrated, for example, if you connect different points of the chambers 2 and 3, but without deviating from the scope and objectives of the invention.

In addition, the shut-off valve 8 can be located anywhere in the channel 6, even, for example, in a place adjacent to the refrigerating chamber 2.

Finally, fans 5 and 12 may be installed in a different manner from the illustrated one, and, as indicated above, the second fan 12 may be absent.

Claims (25)

1. The method of operation of a domestic refrigerator (1) containing at least the first (2) and second (3) food storage chambers and a refrigeration circuit for cooling these chambers (2,3), which contains at least one compressor (9 ), while different temperatures are maintained in the chambers, the first chamber (2) being a refrigerating chamber (2) with a higher supported temperature, and the second chamber (3) being a freezing chamber (3) with a lower supported temperature, characterized in that includes the following steps on which:
b) turn off the compressor (9) for a period of time;
c) take cold air from the freezer (3) and supply it to the refrigerator (2) to maintain the temperature of the latter within the temperature range specified by the first and second limit values (T _fmin , T _fmax ),
however, the specified period of time during which the compressor (9) is turned off is such that the temperature in the freezer (3) does not exceed the third predetermined limit value (T _sup ). 2. The method according to claim 1, characterized in that step b) follows step a), at which the temperature of the freezer (3) is brought to the fourth limit value (T _inf ), which is lower than the normal operating temperature (T _cn ). 3. The method according to claim 2, characterized in that the value of the normal operating temperature (T _cn ) of the freezer (3) essentially coincides with the third limit value (T _sup ). 4. The method according to claim 2, characterized in that the fourth limit value (T _inf ) is lower than the normal operating temperature (T _cn ) of the freezer (3). 5. The method according to claim 3, characterized in that the fourth limit value (T _inf ) is lower than the normal operating temperature (T _cn ) of the freezer (3). 6. The method according to claim 1, characterized in that the first and second limit values (T _fmin , T _fmax ) of the temperature in the refrigerating chamber (2) are practically equal. 7. The method according to claim 2, characterized in that the first and second limit values (T _fmin , T _fmax ) of the temperature in the refrigerator (2) are practically equal. 8. The method according to claim 3, characterized in that the first and second limit values (T _fmin , T _fmax ) of the temperature in the refrigerator (2) are practically equal. 9. The method according to claim 4, characterized in that the first and second limit values (T _fmin , T _fmax ) of the temperature in the refrigerating chamber (2) are practically equal. 10. The method according to claim 5, characterized in that the first and second limit values (T _fmin , T _fmax ) of the temperature in the refrigerating chamber (2) are practically equal. 11. The method according to any one of claims 1 to 10, characterized in that step c) selection of a stream of cold air from the freezer (3) and its supply to the refrigerator (2) to maintain the temperature of the latter within the temperature range specified by the first and the second limit values (T _fmin , T _fMAX ), repeated several times. 12. The method according to any one of claims 1 to 10, characterized in that it includes the steps in which:
- turn on the compressor (9) and maintain its operation until the temperature (T _c ) in the freezer (3) reaches the fourth limit value (T _inf ) or within a predetermined time interval;
- turn off the compressor (9);
- prevent air from flowing between the refrigerator (2) and the freezer (3);
- determine the temperature (T _f ) in the refrigerator (2);
- compare the temperature value determined in the refrigerator (2) (T _f ) with the second limit value (T _fmax );
- if the temperature value (T _f ) exceeds the maximum limit value (T _fmax ), then determine the temperature (T _c ) in the freezer (3) and compare it with the third limit value (T _sup ); if the temperature value (T _c ) in the freezer (3) is below the third limit value (T _sup ), then the refrigerator (2) is communicated in fluid with the freezer (3) to supply cold air from the freezer to the refrigerator, cooling thereby, the refrigerator until the measured temperature reaches the first limit value (T _fmin ), or until the temperature (T _c ) in the freezer exceeds the limit value (T _sup );
- if the temperature value (T _f ) exceeds the maximum limit value (T _fmax ), then determine the temperature (T _c ) in the freezer (3) and compare it with the third limit value (T _sup ); if the temperature (T _c ) in the freezer (3) is above the third limit value (T _sup ), then turn on the compressor (9). 13. The method according to claim 11, characterized in that it includes the steps in which:
- turn on the compressor (9) and maintain its operation until the temperature (Tc) in the freezer (3) reaches the fourth limit value (T _inf ) or within a predetermined time interval;
- turn off the compressor (9);
- prevent air from flowing between the refrigerator (2) and the freezer (3);
- determine the temperature (T _f ) in the refrigerator (2);
- compare the temperature value determined in the refrigerator (2) (T _f ) with the second limit value (T _fmax );
- if the temperature value (T _f ) exceeds the maximum limit value (T _fmax ), then determine the temperature (T _c ) in the freezer (3) and compare it with the third limit value (T _sup ); if the temperature value (T _c ) in the freezer (3) is below the third limit value (T _sup ), then the refrigerator (2) is communicated in fluid with the freezer (3) to supply cold air from the freezer to the refrigerator, cooling thereby, the refrigerator until the measured temperature reaches the first limit value (T _fmin ), or until the temperature (T _c ) in the freezer exceeds the limit value (T _sup );
- if the temperature value (T _f ) exceeds the maximum limit value (T _fmax ), then determine the temperature (T _c ) in the freezer (3) and compare it with the third limit value (T _sup ); if the temperature (T _c ) in the freezer (3) is above the third limit value (T _sup ), then turn on the compressor (9). 14. The method according to any one of claims 1 to 10, 13, characterized in that the fourth limiting value (T _inf ) is lower than the normal operating temperature (T _cn ) by 3-10 ° C, in particular by 6 ° C. 15. The method according to claim 11, characterized in that the fourth limiting value (T _inf ) below the normal operating temperature (T _cn ) by 3-10 ° C, in particular by 6 ° C. 16. The method according to p. 12, characterized in that the fourth limit value (T _inf ) below the normal operating temperature (T _cn ) by 3-10 ° C, in particular by 6 ° C. 17. The method according to any one of claims 1 to 10, 13, 15, 16, characterized in that the first limit value (T _fmin ) varies from 0 ° C to 2 ° C, the second limit value (T _fmax ) varies in range from 4 ° C to 6 ° C, the third limit value (T _sup ) ranges from -20 ° C to -16 ° C, the fourth limit value (T _inf ) ranges from -24 ° C to -30 ° C, and the normal operating temperature of the freezer (3) is approximately -18 ° C. 18. The method according to claim 11, characterized in that the first limit value (T _fmin ) varies from 0 ° C to 2 ° C, the second limit value (T _fmax ) varies from 4 ° C to 6 ° C, the third limit value (T _sup ) varies from -20 ° C to -16 ° C, the fourth limit value (T _inf ) varies from -24 ° C to -30 ° C, and the normal operating temperature of the freezer (3 ) is approximately -18 ° C. 19. The method according to p. 12, characterized in that the first limit value (T _fmin ) varies from 0 ° C to 2 ° C, the second limit value (T _fmax ) varies from 4 ° C to 6 ° C, the third limit value (T _sup ) varies from -20 ° C to -16 ° C, the fourth limit value (T _inf ) varies from -24 ° C to -30 ° C, and the normal operating temperature of the freezer (3 ) is approximately -18 ° C. 20. The method according to any one of claims 1 to 10, 13, 15, 16, 18, 19, characterized in that the duration of step a) is set depending on the control value, such as the temperature in the freezer (3) or a period of time. 21. The method according to any one of claims 1 to 10, 13, 15, 16, 18, 19, characterized in that the first limit value (T _fmin ) is equal to the second limit value (T _fmax ). 22. The method according to any one of claims 1 to 10, 13, 15, 16, 18, 19, characterized in that during step a) the temperature of the refrigerator (2) is brought to a value that is essentially equal to the first limit value (T _fmin ). 23. The method according to any one of claims 1 to 10, 13, 15, 16, 18, 19, characterized in that the inclusion of step a) is controlled by the user. 24. The method according to any one of claims 1 to 10, 13, 15, 16, 18, 19, characterized in that the inclusion of step a) is controlled by the control unit of the refrigerator (1) depending on the moment the user selected step b), and when stage b) is turned on, stage a) is completed. 25. A refrigerator (1) comprising a first refrigerator (2) and a second freezer (3), wherein at least the freezer (3) is in fluid communication with an evaporator (4) of the refrigeration circuit containing at least one a compressor (9), one throttle valve (10) and one condenser (11), while at least one fan (5) is configured to force circulation of air cooled by the evaporator in the freezer (3), the refrigeration chamber (2) and the freezer (3) are communicated with each other by t a heap of medium through the channel (6), blocked by a shut-off valve (8), so that the refrigerator (2) is a cooled air stream taken from the freezer (3), characterized in that it is designed to implement the method according to any one of claims 1- 24.

Images