WO2022131561A1 - Refrigerator and control method thereof - Google Patents

Abstract

The present invention determines the cooling power for load-responsive operation in consideration of the in-compartment temperature at the point when a door is opened, and performs load-responsive operation at the determined cooling power. Thus, excessive power consumption during load-responsive operation can be prevented, and thus it is possible to improve the power consumption resulting therefrom.

Description

Refrigerator and its control method

The present invention relates to a refrigerator and a method for controlling the same according to a new method for efficiently performing a load response operation performed to solve an excessive temperature rise in a refrigerator caused by an opening of a door, thereby improving power consumption. .

BACKGROUND ART In general, a refrigerator is a device that allows storage objects stored in a storage space to be stored for a long time or while maintaining a constant temperature by using cold air.

Such a refrigerator is configured to generate and circulate cold air while being provided with a refrigeration system including a compressor and an evaporator.

When the temperature control for the inside of the storage room rises further than the upper limit reference temperature (NT+diff) based on the set reference temperature (NT; Notch) of the storage room, the compressor is operated to supply cold air into the storage room, and set When the reference temperature (NT) is further lower than the lower limit reference temperature (NT-diff) based on the reference temperature (NT), the operation of the compressor is stopped and the cold air supplied into the storage chamber is blocked.

On the other hand, there is a case in which the temperature in the storage chamber rises even though the refrigeration system does not fail while the general storage operation for the storage chamber is being performed.

This may be the case when hot food is usually stored in the storage compartment, or when the indoor air flows into the storage chamber when the door is opened for a long time.

Accordingly, in the related art, when the door is opened, the load response operation is performed with a higher output (output of the compressor) compared to the general storage operation, so that the inside of the storage chamber reaches the normal storage temperature quickly.

The above-described load response operation has the advantage of protecting the food in the storage room by quickly stabilizing the temperature in the refrigerator, but also has the disadvantage of lowering power consumption.

In relation to the load response operation, various methods such as Patent Publication No. 10-2017-0087440, Patent Publication No. 10-2020-0105183, and Patent Publication No. 10-2020-0087049 are provided.

However, conventionally, when the power consumption of the refrigerator is measured only by performing a general storage operation without opening and closing the door, efforts for efficient load response operation are insufficient.

In other words, since the conventional measurement of power consumption is performed without considering the consumer's real life (the action of opening and closing the door frequently), complaints that it is different from the power consumption perceived by the consumer while actually using it were inevitably caused.

Of course, there is also an effort to improve the efficiency of the execution conditions of the load response operation so as to prevent a decrease in power consumption as in Patent Publication No. 10-2018-0055242.

That is, even when the door is opened, load response operation is performed only when certain conditions (for example, when a temperature rise of 2℃ or more occurs within 5 minutes of opening the door) is performed so that power consumption can be improved in consideration of actual use. did it

However, the load response operation of the prior art has a drawback in that it does not sufficiently satisfy the situation in actual use because the temperature inside the refrigerator at the time the door is opened is not considered.

For example, in the case of the prior art, the temperature at the time the door is opened is a temperature between the set reference temperature (NT) and the upper limit reference temperature (NT+diff) or the temperature of the dissatisfaction area higher than the upper limit reference temperature (NT+diff) In this case, even if it does not exceed 2°C within 5 minutes, it may enter the dissatisfaction area exceeding the upper limit reference temperature (NT+diff), and deterioration of food may occur. That is, the conventional technology has a disadvantage in that it cannot safely protect food because the load response operation is performed only when a temperature change of 2°C occurs even when the temperature in the refrigerator is close to the dissatisfaction region.

In addition, in the case of the prior art, if the temperature at the time the door is opened is between the set reference temperature (NT) and the lower limit reference temperature (NT-diff) or is lower than the lower limit reference temperature (NT-diff), 5 minutes Even if the temperature rises by more than 2℃ inside the storage room, there is a problem in that power consumption is rather reduced because the unconditional load response operation is performed despite the range that satisfies the set reference temperature (NT) inside the storage room.

In addition, the conventional load response operation is controlled to be performed for a predetermined time under the maximum load of the corresponding refrigerator. That is, during the load response operation, the compressor is operated at the maximum load and the cooling fan is operated at the maximum speed so that the temperature inside the refrigerator can be stabilized (maintained within the reference temperature range) as soon as possible.

However, in the conventional method described above, there was a case in which overcooling occurred because the load response operation was continued for a predetermined time even though the temperature inside the refrigerator reached the satisfactory range, and as a result, the power consumption also increased. There was a problem that there was no choice.

Also, while the above-described load response operation is being performed, a case in which the input condition of the defrost operation is satisfied may occur.

In this way, when the input condition of the defrost operation is satisfied, the load response operation is stopped and the operation before the defrost for the defrost operation is preferentially performed.

The operation before the defrost is the cooling power during the general storage operation to prevent the temperature of the storage room from rising rapidly during the defrost operation. do.

However, when the internal temperature of the refrigerator is the upper limit reference temperature (NT+diff) or higher, it takes a long time until the defrosting temperature is reached, and power consumption is rather severe. This caused the power to drop.

Also, while the above-described load response operation is being performed, the door may be reopened according to the user's need.

In this way, when the door is reopened during the load response operation, it is determined whether the load response operation is performed again while the load response operation is initialized.

However, the load response operation method of the prior art has a problem in that it is difficult to lower the internal temperature to the satisfactory region even when the internal temperature reaches the unsatisfactory region because the internal temperature cannot be quickly lowered when the door is frequently opened and closed.

The present invention has been devised to solve various problems according to the prior art, and an object of the present invention is to solve the operating conditions of the load response operation performed to solve the excessive temperature rise in the refrigerator caused by the opening of the door. An object of the present invention is to provide a refrigerator and a method for controlling the same so that power consumption can be improved by improving and efficiently performing load response operation.

Another object of the present invention is to provide a refrigerator and a method for controlling the same so that the load-response operation can be performed by using the temperature inside the refrigerator when the door is opened as a reference, so that the load-response operation can be performed more efficiently.

Another object of the present invention is to provide a refrigerator and a method for controlling the same, in which power consumption due to overcooling can be minimized by controlling the amount of cold air supplied to vary according to the temperature inside the refrigerator during load response operation.

In addition, another object of the present invention is to reduce power consumption by bringing the internal temperature of the refrigerator to a temperature lower than the lower limit reference temperature (NT-diff) as quickly as possible when the input condition of the defrosting operation is satisfied while the load response operation is performed. An object of the present invention is to provide a refrigerator and a method for controlling the same.

According to the refrigerator of the present invention for achieving the above object, the cooling power for performing the load response operation may be determined according to the temperature inside the storage compartment.

According to the refrigerator of the present invention, the load of the cooling power control means can be controlled after the door is closed.

According to the refrigerator of the present invention, the cooling power during the load response operation can be controlled to be higher than that during the general storage operation.

According to the refrigerator of the present invention, the cooling power may vary according to the internal temperature of the storage compartment.

According to the refrigerator of the present invention, the cooling power is, when the temperature in the storage compartment is in the first temperature region higher than the upper limit reference temperature (NT+diff) set based on the set reference temperature (NT) and the set reference temperature (NT) and the upper limit It may be determined differently depending on the case belonging to the second temperature range between the reference temperature (NT+diff).

According to the refrigerator of the present invention, when the temperature in the storage compartment belongs to the first temperature region than the second temperature region, a higher cooling power may be provided.

According to the refrigerator of the present invention, the cooling power is determined when the temperature in the storage compartment falls within the second temperature range between the set reference temperature (NT) and the upper limit reference temperature (NT+diff) and the set reference temperature (NT) and the lower limit reference temperature ( NT-diff) may be determined differently depending on the case belonging to the third temperature region.

In addition, according to the refrigerator of the present invention, when the temperature in the storage compartment belongs to the second temperature region than the third temperature region, a higher cooling power may be provided.

According to the refrigerator of the present invention, the cooling power is lower than the lower limit reference temperature (NT-diff) and when the temperature in the storage compartment is in the third temperature range between the set reference temperature (NT) and the lower limit reference temperature (NT-diff). It may be determined differently depending on the case belonging to the 4 temperature range.

According to the refrigerator of the present invention, when the temperature in the storage compartment belongs to the third temperature region than the fourth temperature region, a higher cooling power may be provided.

According to the refrigerator of the present invention, the cooling power may be determined differently depending on the temperature region in the storage compartment.

According to the refrigerator of the present invention, the cooling power may be controlled by at least one of a compressor and a cooling fan.

According to the refrigerator of the present invention, the cooling power may be varied by adjusting at least one of the load of the compressor and the load of the cooling fan.

According to the refrigerator of the present invention, the higher the temperature inside the storage compartment, the higher the cooling power can be controlled.

According to the refrigerator of the present invention, the cooling power may be controlled to gradually decrease as the operation duration of the load response operation elapses.

According to the refrigerator of the present invention, when the door is reopened while the load-response operation is being performed, the cooling power can be variably controlled according to the temperature inside the storage room after the load-response operation is performed while providing the cooling power of the maximum load.

According to the refrigerator of the present invention, when the input condition of the defrost operation is satisfied while the load response operation is being performed, the load response operation is stopped and the operation before the defrost for the defrost operation may be preferentially performed.

According to the refrigerator of the present invention, when the input condition of the defrost operation is satisfied while the load response operation is being performed, in the pre-defrost operation, the cooling power control means is operated at the maximum load and the internal temperature of the storage chamber is lower than the lower limit reference temperature (NT-diff). It can be cooled until it reaches a low-temperature defrosting operation temperature.

According to the refrigerator of the present invention, the maximum load may be a load sufficient to provide a cooling power higher than that during a general storage operation.

According to the refrigerator of the present invention, after the defrosting operation is completed, cooling power can be provided at the maximum load and then cooled until the internal temperature of the storage chamber reaches a temperature lower than the set reference temperature (NT).

According to the refrigerator of the present invention, when the operation start condition of the load response operation is satisfied when the door is opened, the load response operation is performed while providing cooling power at the maximum load after the door is closed, and then cooling power is supplied according to the temperature inside the storage room. can be variable.

As described above, in the refrigerator and the control method thereof of the present invention, the cooling power of the load response operation is determined in consideration of the temperature inside the refrigerator at the time the door is opened, and the load response operation is performed with the determined cooling power. Accordingly, it is possible to prevent excessive power consumption during the operation of the load response operation, thereby achieving an improvement in power consumption.

In addition, the refrigerator and the control method thereof according to the present invention are configured such that the cooling power is determined differently depending on the temperature region inside the refrigerator at the time the door is opened. Accordingly, there is an effect that an accurate load response operation can be performed.

In addition, the refrigerator and the control method thereof according to the present invention are controlled so that the cooling power during operation varies according to the temperature change in the refrigerator while the load response operation is performed. Accordingly, it is possible to reduce power consumption due to excessive load response operation.

In addition, in the refrigerator and the control method thereof according to the present invention, the cooling power control means is operated at the maximum load in the pre-defrost operation while the load response operation is performed. Accordingly, it has the effect that the time required to reach the defrosting performance temperature can be shortened even in a temperature region where the internal temperature of the furnace is high.

In addition, the refrigerator and the control method thereof according to the present invention are configured to perform the load-response operation at the maximum load for a predetermined time when the first door is reopened, and then perform the load-response operation while varying the cooling power according to the internal temperature of the refrigerator. Accordingly, it is possible to reduce power consumption.

1 is a state diagram illustrating an internal structure of a refrigerator according to an embodiment of the present invention;

2 is a block diagram schematically illustrating a structure for a load-responsive operation of a refrigerator according to an embodiment of the present invention;

3 is a state diagram schematically showing the structure of a thermoelectric module according to an embodiment of the present invention;

4 is a block diagram schematically illustrating a refrigeration cycle of a refrigerator according to an embodiment of the present invention;

5 is a diagram schematically illustrating an operation state performed according to an operation reference value based on a user-set reference temperature for a storage compartment of a refrigerator according to an embodiment of the present invention;

6 is a flowchart illustrating a method for controlling a refrigerator according to a first embodiment of the present invention;

7 is a flowchart illustrating a process of performing a load response operation in a control method of a refrigerator according to the first embodiment of the present invention;

8 is a flowchart illustrating a method for controlling a refrigerator according to a second embodiment of the present invention;

9 is a graph illustrating a state in which a door is opened in a satisfaction region in a control method of a refrigerator according to a second embodiment of the present invention;

10 is a graph illustrating a state in which a door is opened in a dissatisfaction area in a control method of a refrigerator according to a second embodiment of the present invention;

11 is a flowchart illustrating a process of performing a load response operation in a control method of a refrigerator according to a second embodiment of the present invention;

12 is a flowchart illustrating a method for controlling a refrigerator according to a third embodiment of the present invention;

13 is a flowchart illustrating a process of performing a load response operation in a control method of a refrigerator according to a third embodiment of the present invention;

14 is a flowchart illustrating a method for controlling a refrigerator according to a fourth embodiment of the present invention;

15 is a flowchart illustrating a process of performing a load response operation in a control method of a refrigerator according to a fourth embodiment of the present invention;

16 is a flowchart illustrating a method for controlling a refrigerator according to a fifth embodiment of the present invention;

17 is a flowchart illustrating a process of performing a load response operation in a control method of a refrigerator according to a fifth embodiment of the present invention;

The present invention is to reduce power consumption and improve power consumption by allowing the load response operation to be controlled differently depending on the internal temperature of the storage room.

That is, according to the present invention, power consumption can be reduced by allowing the load response operation to be performed not only with the maximum load but with a variable load.

Preferred embodiments of such a refrigerator and a method for controlling the same according to the present invention will be described with reference to FIGS. 1 to 17 attached thereto.

1 is a state diagram illustrating an internal structure of a refrigerator according to an embodiment of the present invention, and FIG. 2 is a schematic diagram illustrating a structure for load response operation of a refrigerator according to an embodiment of the present invention It is a block diagram.

As shown in these drawings, the refrigerator according to the embodiment of the present invention includes a case 11 .

The case 11 includes an inner-case 11a forming an inner wall surface of the refrigerator 1 and an outer case 11b forming an exterior surface of the refrigerator 1, and in this case 11, A storage room is provided in which the stored material is stored by the

Only one storage compartment may be provided, or a plurality of two or more storage compartments may be provided. In an embodiment of the present invention, it is assumed that the storage chamber includes two storage chambers for storing stored materials in different temperature regions.

The storage chamber may include a first storage chamber 12 maintained at a first set reference temperature (NT: Notch Temperature).

The first set reference temperature NT may be a temperature at which the stored object is not frozen, but may be in a temperature range lower than the external temperature (indoor temperature) of the refrigerator 1 .

For example, the first set reference temperature NT may be set to an internal temperature of 32°C or less and greater than 0°C. Of course, the first set reference temperature NT may be set higher than 32°C, or equal to or lower than 0°C, if necessary (eg, depending on the room temperature or the type of storage).

In particular, the first set reference temperature NT may be the internal temperature of the first storage compartment 12 set by the user, and if the user does not set the first set reference temperature NT, An arbitrarily designated temperature is used as the first set reference temperature NT.

In addition, a general storage operation is performed in the first storage chamber 12 with a first operation reference value NT±diff for maintaining the first set reference temperature NT.

The first operation reference value NT±diff is a temperature range value of a satisfactory region including the first lower limit reference temperature NT-diff and the first upper limit reference temperature NT+diff.

That is, when the temperature inside the refrigerator in the first storage chamber 12 reaches the first lower limit reference temperature NT-diff1 based on the first set reference temperature NT, the operation for supplying cold air is stopped. On the other hand, when the internal temperature of the refrigerator is increased based on the first set reference temperature NT, the operation for supplying cold air is resumed before reaching the first upper limit reference temperature NT+diff.

As such, the inside of the first storage compartment 12 is supplied with or stopped supplying cold air in consideration of the first operation reference value NT±diff for the first storage compartment 12 based on the first set reference temperature NT. The general storage operation is performed.

The first set reference temperature NT and the first operation reference value NT±diff are as shown in FIG. 3 .

In addition, the storage chamber may include a second storage chamber 13 maintained at the second set reference temperature NT2.

The second set reference temperature NT2 may be a lower temperature than the first set reference temperature NT. In this case, the second set reference temperature NT2 may be set by the user, and when the user does not set it, an arbitrarily defined temperature is used.

The second set reference temperature NT2 may be a temperature sufficient to freeze the stored object. For example, the second set reference temperature NT2 may be set to a temperature of 0°C or lower -24°C or higher.

Of course, the second set reference temperature NT2 may be set higher than 0°C, or equal to or lower than -24°C, if necessary (eg, according to the room temperature or the type of storage). .

In particular, the second set reference temperature NT2 may be the internal temperature of the second storage chamber 13 set by the user, and if the user does not set the second set reference temperature NT2, An arbitrarily designated temperature may be used as the second set reference temperature NT2.

In addition, the second storage chamber 13 may be operated at a second operating reference value NT2±diff2 for maintaining the second set reference temperature NT2.

The second operation reference value NT2±diff2 is a temperature range value of a satisfactory region including the second lower limit reference temperature NT2-diff2 and the second upper limit reference temperature NT2+diff2.

That is, when the internal temperature of the refrigerator in the second storage chamber 13 reaches the second lower limit reference temperature NT2-diff2 based on the second set reference temperature NT2±diff2, the operation for supplying cold air may be stopped. . On the other hand, when the internal temperature of the refrigerator is increased based on the second set reference temperature NT2, the operation for supplying cold air may be resumed before reaching the second upper limit reference temperature NT2+diff2.

As such, cold air is supplied to the inside of the second storage chamber 13 in consideration of the second operation reference value NT2±diff2 for the second storage chamber 13 based on the second set reference temperature NT2, or the supply is stopped. do.

In particular, the first operation reference value NT±diff may be set to have a smaller range between the upper limit reference temperature NT+diff and the lower limit reference temperature NT-diff than the second operation reference value NT2±diff2. .

For example, the first lower limit reference temperature NT-diff and the first upper limit reference temperature NT+diff of the first operation reference value NT±diff may be set to ±2.0° C., and the second operation reference value NT2 The second lower limit reference temperature (NT2-diff2) and the second upper limit reference temperature (NT2+diff2) of ±diff2) may be set to ±1.5°C.

On the other hand, each of the storage chambers 12 and 13 described above is configured such that the temperature inside the refrigerator is maintained while the fluid is circulated.

The fluid may be air. In the following description, the fluid circulating in the storage chambers 12 and 13 is air as an example. Of course, the fluid may be a gas other than air.

Temperatures outside the storage chambers 12 and 13 (internal temperature) may be measured by the first temperature sensor 1a, and the internal temperature (temperature in the first storage chamber) of the storage chambers 12 and 13 may be measured by the second temperature sensor 1b (see attached FIG. 9 ). ) can be measured by

The first temperature sensor 1a and the second temperature sensor 1b may be formed separately. Of course, the indoor temperature and the internal temperature of the refrigerator may be measured by the same single temperature sensor, or two or more temperature sensors may be configured to measure cooperatively.

In addition, doors 12a and 13a are provided in the storage compartments 12 and 13 .

The doors 12a and 13a serve to open and close the storage compartments 12 and 13, and may have a rotational opening/closing structure or a drawer type opening/closing structure.

One or more of the doors 12a and 13a may be provided.

In particular, at least one of the doors 12a and 13a or the case 11 may be provided with a detection sensor 14 capable of detecting whether the doors 12a and 13a are opened.

Next, the refrigerator 1 according to the embodiment of the present invention includes a cold air heat source.

The cold air heat source is configured to generate cold air.

The cold air heat source may be made in various ways.

For example, the cold air heat source may be composed of a thermoelectric module 23 .

At this time, the thermoelectric module 23 includes at least one of a thermoelectric element 23a including a heat absorbing surface 231 and a heat generating surface 232 , and the heat absorbing surface 231 or the heating surface 232 as shown in FIG. 3 . It can be a module comprising a sink 23b connected to one.

In addition, the cold air heat source may be composed of evaporators (21, 22).

The evaporators 21 and 22 form a refrigeration system together with a compressor 60 (refer to attached FIG. 4), a condenser (not shown), and an expander (not shown), and exchange heat with air passing through the evaporator. operated to lower the temperature of the air.

When the storage chamber includes a first storage chamber 12 and a second storage chamber 13 , the evaporator includes a first evaporator 21 for supplying cold air to the first storage chamber 12 and the second storage chamber 13 . It may be composed of a second evaporator 22 for supplying cold air to the furnace.

At this time, the first evaporator 21 is located on the rear side of the first storage chamber 12 in the inner case 11a, and the second evaporator 22 is located on the rear side of the second storage chamber 13 . can be located on the side.

Of course, although not shown, the evaporator may be provided only in at least one of the first storage chamber 12 and the second storage chamber 13 .

In addition, even if two evaporators 21 and 22 are provided, only one compressor 60 constituting the corresponding refrigeration system may be provided.

In this case, as shown in FIG. 4 , the compressor 60 is connected to supply refrigerant to the first evaporator 21 through the first refrigerant passage 61 and the second refrigerant passage 62 through the second refrigerant passage 62 . It may be connected to supply a refrigerant to the evaporator 22 . At this time, each of the refrigerant passages (61, 62) can be selectively opened and closed using the refrigerant valve (63).

Next, the refrigerator 1 according to the embodiment of the present invention includes a cooling power control means.

The cooling power control means is configured to adjust the cooling power of the cold air supplied to the first storage compartment 12 .

The cooling power regulating means may be configured to enable load control by the controller 70 , and the cooling power regulating means may include at least one of the compressor 60 and the first cooling fan 31 .

Here, the compressor 60 is one of the components constituting the refrigeration system together with the cold air heat source (evaporator) 21 and 22 , and the cooling power can be adjusted by controlling the load of the compressor 60 .

In addition, the first cooling fan 31 is a device that supplies cool air generated while passing through the first evaporator 21 to the first storage chamber 12 , and controls the load (rotation speed) of the first cooling fan 31 . control) to control the cooling power.

Of course, the refrigerator further includes a second cooling fan 41 that supplies cool air generated while passing through the second evaporator 22 to the second storage chamber 13, or the first cooling fan 31 (or , second cooling fan) may be configured to supply cool air generated while passing through the first evaporator 21 or the second evaporator 22 to the second storage chamber 13 .

Next, the refrigerator 1 according to the embodiment of the present invention includes a control unit 70 .

The control unit 70 may be configured to control the load and operation of the cooling power control means (41, 60). That is, the first storage compartment 12 is set to the first setting while controlling the load and operation of the cooling power control means 41 and 60 based on the temperatures measured by the first temperature sensor 1a and the second temperature sensor 1b. It is controlled to maintain the reference temperature (NT).

A temperature range between the first upper limit reference temperature (NT+diff) and the first lower limit reference temperature (NT-diff) may be set as a satisfactory region when viewed based on the first set reference temperature (NT), A temperature higher than the upper limit reference temperature (NT+diff) may be set as a dissatisfaction area.

The control unit 70 may control the loads of the cooling power control means 41 and 60 differently according to the general storage operation and the load corresponding operation.

For example, during the general storage operation, the power saving operation in consideration of the power consumption of the cooling power control means 41 and 60 may be controlled to gradually lower the temperature of the first storage chamber 12 .

On the other hand, in the load response operation, the cooling power control means 41 and 60 are controlled to be operated at a higher load compared to the general storage operation in order to prevent deterioration of the food, and the temperature of the first storage compartment 12 is quickly lowered. can be controlled to

In addition, it is preferable to reduce power consumption by enabling the load response operation to be performed only when an operation start condition is satisfied.

The driving start condition may include an opening condition (first driving condition) of the door (first door) 12a.

The opening condition of the first door 12a may include when the first door 12a is opened or when the first door 12a is opened and closed. That is, when the first door 12a is not opened, it is determined that the operation start condition of the load response operation is not satisfied.

Also, the driving start condition may include a condition of a set elapsed time (a second driving condition).

The condition of the set elapsed time may be from the time the first door 12a is opened until the set elapsed time is reached. That is, it may be set to periodically perform the determination of the condition within the set elapsed time. To this end, the control unit 70 may include a counter 71 for counting time.

Of course, the condition for the set elapsed time may be after the set time has elapsed as the condition for the elapsed time from the opening time of the first door 12a. That is, it may be set to perform the determination of the condition after the set elapsed time has elapsed.

In addition, the operation start condition includes a condition in which the temperature in the first storage compartment 12 measured after the first door 12a is opened exceeds the input condition temperature Δt (third operation condition). can

The input condition temperature Δt may be a specific temperature or a specific temperature range.

Preferably, the input condition temperature (Δt) is a temperature that satisfies the condition of 0 < Δt1 ≤ set upper limit temperature - first upper limit reference temperature (NT+diff). In this case, the set upper limit temperature is the maximum temperature allowable by the first storage compartment 12 of the corresponding refrigerator, and may be a reference temperature for determining whether there is a failure or a complete conception of the evaporator (first evaporator) 21 . . That is, the input condition temperature Δt is determined in a range in which the internal temperature (the temperature in the first storage chamber) does not exceed the set upper limit temperature.

In addition, the input condition temperature (Δt) is higher than the first upper limit reference temperature (NT+diff) at which the temperature measured at the time the first door 12a is opened is set based on the first set reference temperature NT. A high case and a case lower than the first upper limit reference temperature (NT+diff) may be configured to be different from each other.

In addition, the operation start condition may include a case in which the internal temperature (temperature in the first storage room) is greater than or equal to the reference value 1 (internal temperature ≥ the reference value 1) (fourth operation condition).

Here, the reference value 1 is greater than the first upper limit reference temperature (NT+diff) and less than or equal to the set upper limit temperature ((NT+diff)<reference value 1≤set upper limit temperature).

That is, the above-described fourth operating condition is a condition that supplements the second and third operating conditions, and the temperature inside the refrigerator is unsatisfactory after the first door 12a is opened (first upper limit reference temperature (NT+diff)) higher case), the load response operation is performed regardless of the input condition temperature Δt or the elapsed time since the first door 12a is opened.

In addition, the operation start condition may include a case where the reference value 2 is smaller than the input condition temperature Δt (Δt > reference value 2) (fifth operation condition). At this time, the reference value 2 is greater than 0 and smaller than or equal to the difference between the set upper limit temperature and the first upper limit reference temperature (NT+diff) (0 < reference value 2 ≤ set upper limit temperature - first upper limit reference temperature (NT+) diff)) value.

That is, when the input condition temperature Δt is set to fall between the set upper limit temperature and the first upper limit reference temperature NT+diff after the first door 12a is opened, the input condition temperature Δt It is designed so that the load response operation is performed regardless of whether or not it is reached.

On the other hand, if the operation start condition of the load response operation is satisfied when the first door 12a is opened, the control unit 70 changes the cooling power for performing the load response operation according to the temperature inside the first storage compartment 12 . can be configured to determine.

This is because there is a risk of overcooling if the load response operation continues with the maximum cooling power for a predetermined time even though the internal temperature (the temperature inside the first storage room) falls within the satisfactory range when the load response operation is performed. This is because consumption is bound to increase.

That is, the cooling power during the load response operation is determined differently according to the internal temperature of the first storage chamber 12 at the time when the load response operation starts, and during the load response operation, the control unit 70 controls the cooling power of the cooling power control means according to the determined cooling power. As it is made to control the load, unnecessary power consumption can be reduced.

In particular, the temperature in the first storage compartment 12 may be divided into a plurality of regions, and the cooling power may be determined differently depending on the temperature region in the first storage compartment 12 .

The plurality of temperature regions includes a first temperature region in which the temperature in the first storage compartment 12 is higher than the first upper limit reference temperature (NT+diff) set based on the first set reference temperature (NT), and a first set reference temperature A second temperature region between (NT) and the first upper limit reference temperature (NT+diff), and a third temperature region between the first set reference temperature (NT) and the first lower limit reference temperature (NT-diff), At least one temperature region among the fourth temperature regions lower than the first lower limit reference temperature NT-diff may be included.

In this case, the cooling power may be determined to be higher as it corresponds to a temperature region of the high temperature range.

For example, the controller 70 controls to provide a higher cooling power when the temperature in the first storage chamber 12 belongs to the first temperature region than the second temperature region, and the temperature in the first storage chamber 12 is the third temperature region. When belonging to the second temperature region than the temperature region, higher cooling power is controlled to be provided, and when the temperature in the first storage chamber 12 belongs to the third temperature region than the fourth temperature region, it can be controlled to provide a higher cooling power. have.

Of course, the control unit 70 may control the load response operation to end when the temperature in the first storage chamber 12 reaches the fourth temperature range.

That is, if the load response operation is continuously performed despite the temperature in the first storage chamber 12 reaching the fourth temperature range, overcooling occurs and the storage in the first storage chamber 12 is damaged. can Considering this, when the temperature in the first storage compartment 12 reaches a temperature lower than the first lower limit reference temperature NT-diff, it is preferable to end the load response operation and switch to the general storage operation.

In addition, the control unit 70 may continuously check the internal temperature of the first storage chamber 12 while the load response operation is being performed, and control the cooling power to vary according to the checked temperature.

That is, the internal temperature of the first storage chamber 12 gradually decreases due to the load response operation. As this temperature gradually converges to the end temperature of the load response operation (the lower the temperature inside the storage chamber), the cooling power is gradually lowered. This is to prevent excessive temperature drop and power consumption due to this.

By the variable control of the cooling power by the controller 70, the degree of additional temperature drop due to inertia at the end of the load response operation can be minimized, and thus consumption efficiency can be improved.

Of course, the control unit 70 may control the cooling power to be variable according to the driving duration of the load response operation. That is, by variably controlling the cooling power to gradually decrease as the load response operation progresses, it is possible to prevent the internal temperature of the first storage chamber 12 from excessively lowering than the end temperature due to the load response operation.

Also, when the first door 12a is reopened while the load response operation is being performed, the control unit 70 may control the load response operation to be performed while operating the cooling power control means at the maximum load. That is, when the first door 12a is reopened during the load response operation, the maximum cooling power can be provided when the first door 12a is closed regardless of whether the driving start condition is satisfied.

In this case, the maximum load is a load sufficient to provide a higher cooling power than that during a general storage operation.

Of course, the provision of the above-described maximum cooling power is performed until a predetermined time elapses after the re-performation of the load response operation is performed, and after that, it is more preferable to control the cooling power to be variable according to the temperature inside the first storage compartment 12 . do.

In addition, when the input condition of the defrost operation is satisfied while the load response operation is being performed, the control unit 70 may control the load response operation to be stopped and the operation before the defrost for the defrost operation to be preferentially performed.

In particular, the operation before the defrost is cooled until the internal temperature of the first storage chamber 12 reaches a defrosting performance temperature lower than the first lower limit reference temperature (NT-diff) while controlling the cooling power control means to operate at the maximum load. can be controlled as much as possible.

The control of the controller 70 is to minimize the time until the defrosting operation temperature is reached even when the internal temperature of the refrigerator is the first upper limit reference temperature (NT+diff) or higher.

At the same time, the control unit 70 performs a defrost operation after the operation before the defrost is finished, and after the defrost operation is completed, the cooling power control means is operated at the maximum load, and then the temperature inside the first storage chamber 12 is controlled. 1 It can be controlled to cool until it reaches a temperature lower than the set reference temperature (NT).

Next, a control method for a general storage operation and a load response operation of the refrigerator according to the first embodiment described above will be described in more detail with reference to the accompanying flowcharts of FIGS. 6 and 7 .

Prior to the description, each operation is performed by the control of the control unit 70 which receives the sensing values of the respective temperature sensors 1a and 1b and operates the refrigeration system, and in the first embodiment below, the first storage compartment 12 For example, each operation for .

First, as shown in the flowchart of FIG. 6 , the control unit 70 continuously acquires sensing values for the indoor temperature and the temperature inside the refrigerator in the first storage room 12 ( S110 ).

The internal temperature of the refrigerator is measured by the second temperature sensor 1b located in the first storage compartment 12 , and the measured internal temperature is provided to the controller 70 .

Then, the control unit 70 continuously performs the general storage operation for the first storage compartment 12 while controlling the cooling power control means based on the acquired internal temperature (S120).

The general storage operation maintains the temperature range of the satisfactory region (the temperature range between the first upper limit reference temperature (NT+diff) and the first lower limit reference temperature (NT-diff)) based on the first set reference temperature (NT) made to do

In this case, the compressor 60 constituting the refrigeration system during the general storage operation is controlled to operate at a lower output compared to the load corresponding operation.

In addition, in the general storage operation, when the first upper limit reference temperature (NT+diff) is reached, the compressor 60 is operated while increasing the supply of cold air, and the compressor before reaching the first lower limit reference temperature (NT-diff) While the operation of (60) is stopped, it proceeds by continuously repeating the control to reduce the cold air supply.

Of course, the compressor 60 may be controlled to operate before reaching the first upper limit reference temperature (NT+diff), and when reaching the dissatisfaction region exceeding the first upper limit reference temperature (NT+diff) It can also be controlled to be driven.

In addition, while the above-described general storage operation is being performed, the control unit 70 continuously determines whether the operation start condition of the load response operation is satisfied based on the temperature information inside the first storage chamber 12 .

The driving start condition is preceded by a condition in which the first door 12a is opened.

That is, only when the first door 12a for opening and closing the first storage compartment 12 is opened, the operation start condition of the load response operation is determined, and in a situation where the first door 12a is not opened, Repeated normal storage operation is performed.

When it is confirmed that the first door 12a is opened while the general storage operation is being performed, the control unit 70 receives a temperature value for the internal temperature of the refrigerator from the second temperature sensor 1b (S130). In this case, the temperature value for the internal temperature may be continuously provided within a set elapsed time after the first door 12a is opened, or may be provided after the set elapsed time has elapsed.

Subsequently, the control unit 70 checks whether the received internal temperature is a satisfactory region or a dissatisfaction region set based on the first set reference temperature NT.

As a result of this check, if it is confirmed that the internal temperature of the refrigerator belongs to the dissatisfaction region (the region outside the first upper limit reference temperature (NT+diff)), the input condition temperature Δt or the elapsed time from the opening of the first door 12a Regardless, it is determined that the driving start condition is satisfied (S140).

On the other hand, if it is confirmed that the internal temperature of the refrigerator belongs to the satisfactory region (the region within the first upper limit reference temperature (NT+diff)), the counted elapsed time from after the first door 12a is opened by the counter 71 Check the time.

Then, while the elapsed time is being counted or when the counting time has elapsed, the increase in the internal temperature is checked to determine whether the increase is equal to or greater than the preset input condition temperature (Δt).

That is, if the increase in the internal temperature is greater than or equal to the input condition temperature (Δt), it is determined that the operation start condition is satisfied (S140). judged to be unsatisfactory.

For example, if the temperature increase in the refrigerator exceeds 2°C (input condition temperature) when 5 minutes (elapsed time) have elapsed after opening the first door 12a, it is determined that the operation start condition is satisfied and exceeds 2°C. If not, it is judged that the driving start condition is not satisfied.

And, when it is determined that the operation start condition is satisfied (when the temperature inside the refrigerator is a dissatisfaction area or, even in a satisfactory area, the temperature increase in the refrigerator is greater than or equal to the input condition temperature (Δt)), the control unit 70 according to the determination result It is controlled to perform the load response operation (S150).

The load response operation may be performed while the first door 12a is closed.

That is, if it is determined that the driving start condition for the load response operation is satisfied before the first door 12a is closed, the load response operation may be performed immediately after the first door 12a is closed, and If it is determined that the driving start condition for the load response operation is satisfied after the first door 12a is closed, the load response operation may be performed immediately after the satisfaction is determined.

In particular, as shown in the flow chart of FIG. 7 , the load response operation S150 is performed with a cooling power determined according to the internal temperature of the first storage compartment 12 . That is, when the operation start condition for the load response operation is satisfied when the first door 12a is opened, the control unit 70 checks the temperature inside the first storage compartment 12 ( S151 ) and then loads the load according to the checked temperature ( S151 ). The cooling power for performing the corresponding operation is determined (S152), and when the first door 12a is closed, the load of the cooling power adjusting means (compressor or the first cooling fan) is controlled (S153) according to the determined cooling power. It is a response operation.

In this case, the cooling power is determined differently depending on the temperature region in the first storage chamber 12 . That is, the controller 70 determines to provide a higher cooling power as the interior of the first storage chamber 12 corresponds to a temperature region of a high temperature range. Conversely, the controller 70 determines to provide a lower cooling power as the interior of the first storage chamber 12 corresponds to a temperature region of a low temperature range.

And, while the load control of the cooling power control means (compressor or the first cooling fan) by the control unit 70 with the determined cooling power is performed, the temperature inside the first storage chamber 12 is continuously checked (S154), and the control unit In step 70, the cooling power is recrystallized according to the confirmed temperature (S155), and the load of the cooling power adjusting means is variably controlled (S156) according to the recrystallized cooling power.

That is, the internal temperature of the first storage chamber 12 gradually decreases due to the load response operation, and the cooling power is controlled to gradually decrease according to the temperature. In this way, excessive temperature drop and power consumption due to this can be prevented.

Of course, if the operation start condition of the load response operation is satisfied when the first door 12a is opened, the cooling power control means (compressor or first cooling fan) is operated at the maximum load after the first door 12a is closed. After controlling so that the load response operation of the maximum cooling power is performed, the cooling power may be controlled to be variable according to the temperature inside the first storage chamber 12 during the load response operation.

In addition, the control unit 70 may variably control the cooling power to gradually decrease as the operation progressing time of the load response operation elapses regardless of the temperature change inside the first storage chamber 12 .

If the first door 12a is reopened while the load response operation is being performed, the control unit 70 operates the cooling power control means (compressor or first cooling fan) at the maximum load, and the load response operation is performed. to be controlled as much as possible. Accordingly, it is possible to reduce the time required for reconfirming the operation start condition of the load response operation.

The provision of the maximum cooling power is performed until a predetermined time elapses after the re-performation of the load response operation is performed, and when this time elapses, the cooling power is controlled to be variable according to the temperature inside the first storage chamber 12 .

In addition, when the input condition of the defrost operation is satisfied while the load response operation is being performed, the load response operation is stopped and the operation before the defrost for the defrost operation is controlled to be preferentially performed.

That is, the control unit 70 controls the cooling power control means (compressor or the first cooling fan) to operate at the maximum load while the internal temperature of the first storage chamber 12 is lower than the first lower limit reference temperature NT-diff. It is operated to cool until it reaches the defrost operation temperature. Accordingly, even when the internal temperature of the refrigerator is the first upper limit reference temperature (NT+diff) or higher, the time until the defrosting operation temperature is reached can be minimized.

And, when the operation before the defrost is finished, the control unit 70 performs a defrost operation. In the defrosting operation, the first evaporator 21 is heated by providing hot air, and air is blown through the first evaporator 21 through the operation of the first cooling fan 31 to pass the first evaporator 21 . It will defrost the frost that has been implanted on the surface of

Subsequently, when the defrosting operation is completed, the control unit 70 stops providing hot air and operates the cooling power control means (compressor and first cooling fan) at the maximum load while setting the internal temperature of the first storage compartment 12 to the first setting. It is controlled to cool until it reaches a temperature lower than the reference temperature (NT).

Thereafter, the control unit 70 performs a general storage operation, and the temperature range (the first upper limit reference temperature (NT+diff) and the first lower limit reference temperature (NT-diff) of the interior of the first storage chamber 12 is satisfied. temperature range).

Of course, if the operation start condition of the load response operation is not satisfied during the execution of the above-described general storage operation, the control unit 70 controls to continuously perform the general storage operation according to the internal temperature of the refrigerator.

On the other hand, the refrigerator of the present invention can be implemented in various ways as well as the control method of the first embodiment described above.

Hereinafter, a control method according to another embodiment of such a refrigerator will be described, respectively.

First, the control method of the second embodiment by the control unit 70 will be described in more detail with reference to the accompanying FIGS. 8 to 11 .

The operation start condition according to the control method of the second embodiment is the process of confirming the internal temperature of the refrigerator (S210), performing a general storage operation according to the internal temperature (S220), and the first door 12a during the general storage operation. When it is opened, the process of checking the temperature inside the refrigerator (S230) may be included.

In addition, the operation start condition according to the control method of the second embodiment may include a process in which different input condition temperatures Δt1 and Δt2 are respectively determined according to the temperature inside the refrigerator.

That is, in the case of the prior art, it is determined whether or not the operation start condition is satisfied based on the same input condition temperature (temperature increase width) regardless of the temperature of the first storage compartment 12 at the time the door 12a is opened, whereas the present invention is such that the input condition temperature Δt is set in different ranges depending on the temperature of the first storage compartment 12 at the time when the door 12a is opened.

When the input condition temperature Δt is higher than the upper limit reference temperature (NT+diff) set based on the set reference temperature (NT) at the time the door 12a is opened, the temperature of the first storage chamber 12 is higher than the input condition temperature Δt (In the case of a dissatisfied region) and a case lower than the upper limit reference temperature (NT+diff) (in the case of a satisfactory region) may be different from each other.

That is, when the internal temperature of the refrigerator is in the unsatisfactory region, it is determined as the first input condition temperature Δt1, and when the internal temperature is in the satisfactory region, it is determined as the second input condition temperature Δt2.

In particular, the two input condition temperatures Δt1 and Δt2 are the first when the temperature of the first storage compartment 12 is high at the time the door 12a is opened, and the first when the door 12a is opened. It may be set to a lower temperature (or temperature range) than when the temperature of the storage chamber 12 is low.

That is, the first input condition when the temperature of the first storage compartment 12 is higher than the first upper limit reference temperature (NT+diff) set based on the first set reference temperature (NT) at the time the door (12a) is opened When the temperature Δt1 is lower than the first upper limit reference temperature NT+diff, it may be set to a temperature (or a temperature range) lower than the second input condition temperature Δt2 .

Of course, the second input when the temperature of the first storage compartment 12 is lower than the first upper limit reference temperature (NT+diff) set based on the first set reference temperature (NT) at the time the door 12a is opened When the condition temperature Δt2 is higher than the upper limit reference temperature NT+diff, the first input condition temperature Δt1 may be set to a higher temperature (or temperature range).

Hereinafter, the control method for the load response operation of the refrigerator according to the second embodiment will be described in more detail with reference to the flowchart of FIG. 7 and the graphs of FIGS. 8 and 9 .

First, the controller 70 continuously acquires the internal temperature of the refrigerator, and continuously performs a general storage operation for the first storage compartment 12 while controlling the refrigeration system based on the acquired internal temperature.

Accordingly, the first storage compartment 12 is the temperature range of the satisfaction region based on the first set reference temperature NT (the temperature between the first upper limit reference temperature NT+diff and the first lower limit reference temperature NT-diff). range) is maintained.

And, while the above-described general storage operation is being performed, the control unit 70 continuously determines whether the operation start condition of the load response operation is satisfied based on the temperature information inside the first storage chamber 12 .

The driving start condition is preceded by a condition in which the first door 12a is opened.

That is, only when the first door 12a that opens and closes the first storage compartment 12 is opened, the operation start condition of the load response operation is determined, and in a situation where the first door 12a is not opened, Repeated general storage operation is performed.

And, when it is confirmed that the first door 12a is opened while the general storage operation is being performed, the controller 70 receives a temperature value for the internal temperature of the refrigerator from the second temperature sensor 1b.

Subsequently, the control unit 70 checks whether the received internal temperature is a satisfactory region or a dissatisfaction region set based on the first set reference temperature NT, and determines the input condition temperature Δt based on this .

That is, when the internal temperature of the refrigerator is the unsatisfactory region, the first input condition temperature Δt1 is determined (S241), and when the internal temperature is the satisfactory region, the second input condition temperature Δt2 is determined (S242). In this case, the first input condition temperature Δt1 may be set to a temperature (or a temperature range) lower than the second input condition temperature Δt2 .

Then, when the input condition temperature (Δt1 or Δt2) is determined by the above process, the elapsed time from when the door 12a is opened is counted using the counter 71 .

In this case, the elapsed time may be set to a time sufficient to accurately recognize the temperature increase and the recognized temperature increase to obtain an effective value, and may be usually 5 minutes.

And, when the set elapsed time has elapsed, the control unit 70 receives the internal temperature of the first storage compartment 12 at the time point again from the second temperature sensor 1b.

Thereafter, if it is confirmed that the received internal temperature of the refrigerator has increased by more than the input condition temperature (Δt1 or Δt2), it is determined that the operation start condition of the load response operation is satisfied.

That is, when the temperature inside the refrigerator is a dissatisfaction area when the door 12a is opened as shown in FIG. 9, if the temperature of the input condition rises above Δt1 set as the input condition temperature, it is determined that the operation start condition of the load response operation is satisfied, as shown in FIG. 10 When the door 12a is opened and the temperature inside the refrigerator is in the satisfactory range, it is determined that the operation start condition of the load response operation is satisfied if the temperature Δt2 or more set as the input condition temperature rises.

In this case, the determination of the driving start condition may be performed periodically within the set elapsed time from the opening time of the door 12a or after the set elapsed time has elapsed from the opening time of the door 12a. may be

Then, the load response operation is performed according to the determination result as to whether the operation start condition is satisfied (S250).

As an example, when the first set reference temperature NT is 13° C. and the first upper limit reference temperature NT+diff is 23° C., the temperature of the first storage compartment 12 is In the case of 20°C, the input condition temperature (Δt2) is set to 4°C, and when the temperature of the first storage chamber 12 is 25°C when the door 12a is opened, the input condition temperature (Δt1) is 2°C can be set to That is, if the temperature of the first storage compartment 12 is 20° C. at the time the door 12a is opened, the temperature of the first storage compartment 12 reaches 24° C. within the set elapsed time condition (eg, 5 minutes). If the load response operation is performed and the temperature of the storage room is 25°C when the door is opened, the load response operation is performed when the temperature of the first storage room 12 reaches 27°C within the set elapsed time condition (eg, 5 minutes) carry out

The load response operation may be performed while the first door 12a is closed.

That is, if it is determined that the driving start condition for the load response operation is satisfied before the first door 12a is closed, the load response operation is performed immediately after the first door 12a is closed, and the first door 12a is closed. If it is determined that the driving start condition for the load response operation is satisfied after the door 12a is closed, the load response operation is performed immediately after the satisfaction is determined.

In particular, as shown in the flowchart of FIG. 11, the control unit 70 checks the temperature in the first storage chamber 12 confirmed through the second temperature sensor 1b (S251) during the load response operation as shown in the flowchart of FIG. After determining the cooling power according to the cooling power (S252), the cooling power thus determined is set as the initial cooling power, and the cooling power control means is controlled (S253) to perform the load response operation.

And, while the load response operation is being performed, the internal temperature change of the first storage chamber 12 is checked (S254), and the cooling power is recrystallized according to the checked temperature (S255), and then the cooling power control means according to the recrystallized cooling power Variably control the load of (S256).

Of course, the cooling power may be variably controlled according to the driving time.

As such, the operation control method of the second embodiment by the control unit 70 prevents in advance the problem of deterioration of stored food (eg, fresh food, etc.) be able to do

Next, the control method of the third embodiment by the control unit 70 will be described in more detail with reference to the accompanying flowchart of FIG. 12 .

The operation start conditions according to the control method (S3) of the third embodiment are the process of checking the temperature inside the refrigerator (S310), performing a storage operation according to the temperature inside the refrigerator (S320), and when the door is opened during the storage operation, the inside of the refrigerator The process of checking the temperature (S330) may be included.

In addition, the operation start condition according to the control method of the third embodiment is when the temperature change amount per unit time (temperature gradient) is measured while counting the elapsed time and the temperature change amount per unit time is greater than the reference value 3 (temperature change amount > reference value 3) may be included. In this case, the reference value 3 may be a value greater than 1.

That is, if the amount of temperature change per unit time after the door 12a is opened is greater than the reference value 3, it is determined that the operation start condition is satisfied while recognizing that a rapid increase in the internal temperature is made (S340), and after counting the time (S350) When the set time elapses, the load response operation is performed (S360).

In particular, as shown in the flow chart of FIG. 13 , during the load response operation, the control unit 70 checks the temperature in the first storage chamber 12 checked through the second temperature sensor 1b ( S361 ), and the temperature confirmed in this way After determining the cooling power according to (S362), the determined cooling power is set as the initial cooling power, and the cooling power control means is controlled (S363) to perform the load response operation.

And, while the load response operation is being performed, a change in the internal temperature of the first storage compartment 12 is checked (S364), and the cooling power according to the checked temperature is recrystallized (S365), and then the cooling power control means according to the recrystallized cooling power. Variably control the load of (S366).

Next, the control method of the fourth embodiment by the control unit 70 will be described in more detail with reference to the accompanying flowchart of FIG. 14 .

The operation start condition according to the control method of the fourth embodiment is the process of checking the inside temperature (S410), performing a storage operation according to the inside temperature (S420), and checking the inside temperature when the door is opened during the storage operation (S430) may be included. Since this is the same as the content introduced through the control method of the first embodiment described above, repeated description will be omitted.

In addition, the driving start condition according to the control method S4 of the fourth embodiment is confirmed as a temperature in which the internal temperature exceeds the upper limit reference temperature (NT+diff) after the door 12a is opened, so that the driving start condition is satisfied If it is determined (S440), the control unit 70 counts the elapsed time after closing the door 12a (S450), and controls the load response operation to be input (S460) when the first reference time is reached.

That is, considering that the stored food and the cold air in the first storage room 12 are gradually heat exchanged, the load response operation is started after the sensed value is stabilized, so that the end time of the load response operation can be accurately determined.

In particular, when the internal temperature ≥ (NT+diff + set upper limit temperature)/2 is satisfied after the door 12a is opened, the counted time is reset after the counted elapsed time is reset to the second reference time. When the second reference time is reached, the operation start condition may be set to perform the load response operation. In this case, the second reference time may be shorter than the first reference time.

That is, the case where the internal temperature of the refrigerator is higher than the case where the internal temperature of the refrigerator is ≥(NT+diff + upper limit temperature)/2 After counting for a short time, load response operation can be put into operation.

In particular, as shown in the flow chart of FIG. 15 , during the load response operation, the control unit 70 checks the temperature in the first storage chamber 12 confirmed through the second temperature sensor 1b ( S461 ), and the temperature confirmed in this way After determining the cooling power according to (S462), the cooling power thus determined is set as the initial cooling power, and the cooling power control means is controlled (S463) to perform the load response operation.

And, while the load response operation is being performed, a change in the internal temperature of the first storage chamber 12 is checked (S464), and the cooling power is recrystallized according to the checked temperature (S465), and then the cooling power control means according to the recrystallized cooling power Variably control the load of (S466).

Next, the control method of the fifth embodiment by the control unit 70 will be described in more detail with reference to the accompanying flowchart of FIG. 16 .

The operation start condition according to the control method (S5) of the fifth embodiment is the process of checking the temperature inside the refrigerator (S510), performing a storage operation according to the temperature inside the refrigerator (S520), and when the door is opened during the storage operation, the inside of the refrigerator The process of checking the temperature (S530) may be included. Since this is the same as the content introduced through the control method of the first embodiment described above, repeated description will be omitted.

In addition, the driving start condition according to the control method of the fifth embodiment may include a condition in which a different elapsed time from when the door 12a is closed to when the load response operation is inputted according to the amount of temperature change per unit time is reached.

That is, when the internal temperature of the refrigerator is greater than the upper limit reference temperature (NT+diff), the temperature change per unit time is measured (S540) while counting the elapsed time. If this temperature change is greater than the reference value 3, the counting time is When the first set time elapses, the load response operation is input (S560).

If the amount of temperature change is smaller than the reference value 3, when the counting time elapses the second set time, the load response operation is input (S570).

The second set time is set to be longer than the first set time.

The method in which the load response operation is input when the first set time elapses is an algorithm that considers the constant temperature operation for the freshness (or deterioration) of the stored food, and the load response operation is input when the second set time elapses The method is an algorithm that considers power consumption.

In particular, when the load response operation is input (S560, S570) as shown in the flowchart of FIG. 17, the control unit 70 checks the temperature in the first storage chamber 12 confirmed through the second temperature sensor 1b (S561) ) and, after determining (S562) the cooling power according to the thus-confirmed temperature, the determined cooling power is set as the initial cooling power, and the cooling power control means is controlled (S563) to perform the load response operation.

And, while the load response operation is being performed, the change in the internal temperature of the first storage chamber 12 is checked (S564), and the cooling power according to the checked temperature is recrystallized (S565), and then the cooling power control means according to the recrystallized cooling power Variably control the load of (S566).

As described above, in the refrigerator of the present invention, the cooling power of the load response operation is determined in consideration of the temperature inside the first storage compartment 12 at the time the first door 12a is opened, and the load response operation is performed with the determined cooling power. Since it is made to be performed, it is possible to prevent excessive power consumption during the operation of the load response operation, thereby improving power consumption.

In addition, in the refrigerator of the present invention, the cooling power is determined differently according to the temperature region inside the first storage compartment 12 at the time when the first door 12a is opened, so that an accurate load response operation can be performed.

In addition, the refrigerator according to the present invention is controlled to change the cooling power during operation according to a temperature change in the first storage compartment 12 while the load response operation is being performed, thereby reducing power consumption due to the excessive load response operation.

In addition, in the refrigerator of the present invention, the cooling power control means is controlled to operate at the maximum load in the pre-defrost operation performed when the input condition of the defrost operation is satisfied while the load response operation is being performed. The time required to reach the temperature can be shortened.

In addition, in the refrigerator of the present invention, when the first door 12a is reopened due to the user's need while the load response operation is being performed, the load response operation is performed at the maximum load for a certain period of time, and then the temperature inside the refrigerator is lowered. As the cooling power is varied according to the load response operation, power consumption can be reduced.

Claims (20)

1. storeroom;

   a door for opening and closing the storage compartment;

   a temperature sensor for measuring the temperature inside the storage chamber;

   a cold air heat source that generates cold air;

   Cooling power control means for adjusting the cooling power of the cold air supplied to the storage chamber while the load control is possible;

   Includes; a control unit for controlling the load of the cooling power control means;

   The control unit is

   When the operation start condition of the load response operation is satisfied when the door is opened, the cooling power for performing the load response operation is determined according to the temperature inside the storage room, and after the door is closed, the load of the cooling power control means is determined according to the determined cooling power Refrigerator, characterized in that it is configured to perform a load response operation while controlling the.
2. The method of claim 1,

   The control unit is

   The refrigerator, characterized in that the cooling power during the load response operation is controlled to be higher than that during the general storage operation.
3. The method of claim 1,

   The cooling power is

   A refrigerator, characterized in that it varies according to the internal temperature of the storage room during the load response operation.
4. 4. The method of claim 3,

   The cooling power is

   Refrigerator, characterized in that the lower the temperature inside the storage chamber during the load response operation is variably controlled to become lower.
5. The method of claim 1,

   The plurality of temperature regions,

   A first temperature region higher than the upper limit reference temperature (NT + diff) set based on the set reference temperature (NT),

   a second temperature region between the set reference temperature (NT) and the upper limit reference temperature (NT + diff);

   a third temperature region between the set reference temperature (NT) and the lower limit reference temperature (NT-diff);

   Refrigerator, characterized in that at least one temperature region of the fourth temperature region lower than the lower limit reference temperature (NT-diff) is included.
6. 6. The method of claim 5,

   The control unit is

   The refrigerator according to claim 1, wherein when the temperature in the storage compartment belongs to the first temperature region than the second temperature region, a higher cooling power is controlled to be provided.
7. 6. The method of claim 5,

   The control unit is

   The refrigerator according to claim 1, wherein when the temperature in the storage compartment belongs to the second temperature region than the third temperature region, a higher cooling power is provided.
8. 6. The method of claim 5,

   The control unit is

   The refrigerator according to claim 1, wherein when the temperature in the storage compartment belongs to the third temperature region than the fourth temperature region, a higher cooling power is provided.
9. The method of claim 1,

   The cooling power control means includes at least one of a compressor and a cooling fan,

   and the controller is configured to control at least one of a load of the compressor and a load of the cooling fan to vary the cooling power.
10. The method of claim 1,

    The cooling power is

    Refrigerator, characterized in that variably controlled to gradually decrease as the operation progress time of the load response operation elapses.
11. The method of claim 1,

    The control unit is

    When the door is reopened while the load response operation is being performed, the cooling power control means is operated at the maximum load and the load response operation is controlled to be performed, and then the cooling power is controlled to vary according to the temperature inside the storage room. refrigerator.
12. The method of claim 1,

    The control unit is

    If the input condition of the defrost operation is satisfied while the load response operation is being performed, the load response operation is stopped and the operation before the defrost for the defrost operation is preferentially performed,

    The refrigerator, characterized in that the pre-defrost operation is performed to cool the cooling power control means to operate at the maximum load until the internal temperature of the storage chamber reaches a defrosting execution temperature lower than the lower limit reference temperature (NT-diff).
13. 13. The method of claim 12,

    The maximum load is

    A refrigerator, characterized in that the load is sufficient to provide a cooling power higher than that during a general storage operation.
14. 13. The method of claim 12,

    The control unit is

    After the operation before the defrost is finished, a defrost operation is performed,

    After the defrosting operation is completed, the cooling power control means is operated at the maximum load, and then the temperature inside the storage compartment is controlled to be cooled until it reaches a temperature lower than the set reference temperature (NT).
15. storeroom;

    a door for opening and closing the storage compartment;

    a temperature sensor for measuring the temperature inside the storage chamber;

    a cold air heat source that generates cold air;

    cooling power control means for controlling the cooling power of the cold air generated and supplied by the cold air heat source;

    A control unit for controlling the cooling power adjusting means so that the cooling power is gradually increased, gradually decreased, or provided as a maximum load;

    The control unit is

    If the operation start condition of the load response operation is satisfied when the door is opened, after the door is closed, the cooling power control means is operated at the maximum load and the load response operation of the maximum cooling power is controlled to be performed, and then the temperature inside the storage room during the load response operation Refrigerator, characterized in that the cooling power is variably controlled according to the
16. 16. The method of claim 15,

    The control unit is

    When the door is reopened while the load response operation is being performed, the cooling power control means is operated at the maximum load and the load response operation is controlled to be performed, and then the cooling power is controlled to vary according to the temperature inside the storage room. refrigerator.
17. 16. The method of claim 15,

    The control unit is

    If the input condition of the defrost operation is satisfied while the load response operation is being performed, the load response operation is stopped and the operation before the defrost for the defrost operation is preferentially performed,

    The refrigerator, characterized in that the pre-defrost operation is performed to cool the cooling power control means to operate at the maximum load until the internal temperature of the storage chamber reaches a defrosting execution temperature lower than the lower limit reference temperature (NT-diff).
18. a general storage operation step of increasing the cold air supply when the temperature in the storage room is in the unsatisfactory region and maintaining the temperature in the storage in the satisfactory region while controlling so that the cold air supply is decreased when the temperature is in the satisfactory region;

    a cooling power determination step of determining a cooling power for performing a load response operation according to a temperature inside the storage room when the operation start condition of the load response operation is satisfied when the door is opened while the general storage operation is being performed;

    and a load response operation step of performing a load response operation while controlling the load of the cooling power adjusting means according to the determined cooling power after the cooling power is determined and the door is closed.
19. 19. The method of claim 18,

    The control method of the refrigerator, characterized in that while the load response operation of the load response operation step is performed, the cooling power of the cooling power adjusting means is controlled to vary according to the internal temperature of the storage compartment.
20. 19. The method of claim 18,

    If the door is reopened while the load response operation is being performed,

    While operating the cooling power control means at the maximum load, the load response operation is performed,

    The control method of the refrigerator, characterized in that by checking the temperature inside the storage chamber while the load response operation is performed, and controlling the cooling power to gradually decrease as the temperature decreases.

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