KR20150032404A - refrigerator and control method thereof - Google Patents

Abstract

Provided are a refrigerator and a control method thereof, capable of counting opening and closing times of a door of the refrigerator and analyzing the pattern to perform defrosting at a time when a user less frequently uses the refrigerator. To this end, according to an embodiment of the present invention, the refrigerator includes: an evaporator; a defrosting heater installed near the evaporator; an input unit arranged to set a learning defrost function of the defrosting heater; a door opening and closing sensor sensing an opening and closing of the door of the refrigerator when setting the learning defrost function by the input unit; a memory storing sensed data about the opening and closing of the door; and a control unit counting the opening and closing times of the door based on the stored data, analyzing the pattern, determining a time to defrost based on the analysis, and controlling the defrosting heater.

Description

REFRIGERATOR AND CONTROL METHOD THEREOF BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to a refrigerator and a control method thereof, and more particularly, to a refrigerator including a defrost heater and a control method thereof.

Generally, a refrigerator is a household appliance that stores a food in a fresh state by having a storage room for storing food and a cooler for supplying cool air to the storage room.

The refrigerator is operated by repeating a refrigeration cycle consisting of compressing, condensing, expanding and evaporating the refrigerant and absorbing the surrounding heat during evaporation.

At this time, condensation and freezing of the atmospheric water vapor in the evaporator cause a phenomenon of adhering to the surface of the cooling tube in a frost state.

If the evaporator gets hot, various problems such as temperature rise in the refrigerating room and liquid compression in the compressor occur due to disturbance of the heat of the evaporator, and work for removing the refrigerant should be performed. The defrost is called defrosting by generating heat flow through the heater or fan and dissolving it by vaporizing or evaporating. The heat flow generated at this time causes high-temperature, high-humidity air to flow into the furnace.

This causes an increase in the internal temperature, and a temperature rise occurs on a surface having a relatively lower temperature than air. In addition, there is a problem that the temperature rise is increased due to opening and closing by the user during defrosting.

The present invention is to provide a refrigerator and a control method thereof, in which the number of door opening and closing times of a refrigerator is counted and the patterns are analyzed to perform defrosting at a time when a user uses a refrigerator is small.

According to an aspect of the present invention, there is provided a refrigerator including an evaporator, a defrost heater disposed around the evaporator, an input unit configured to set a learning defrosting function of the defrost heater, A door opening / closing sensor for detecting door opening / closing of the refrigerator, a memory for storing data on the detected door opening / closing, and a door opening / closing counting unit for counting door opening / closing times based on the stored data, And controls the defrost heater.

The control unit may be configured to set a plurality of control intervals, to divide the first control interval into a first predetermined number of days, to divide each of the plurality of days into a plurality of preset statistical intervals, A pattern is analyzed if the average number of door opening / closing times is equal to or less than a preset number of times, a B pattern is determined when the average number of times of door opening / closing is less than a predetermined second number, and a C pattern is determined.

In addition, the control unit can immediately control the defrost heater when the pattern A is seen.

The control unit may extend the control time point of the defrost heater to the time when the A pattern is seen within a first predetermined time when the B pattern is displayed, and immediately when the A pattern is not seen within the preset first time, Can be controlled.

When the C pattern is displayed, the control unit extends the control point of the defrost heater until the A pattern or the B pattern is displayed within the first predetermined time, and does not show the A pattern or the B pattern within the preset first time The defrost heater can be controlled immediately.

The refrigerator may further include an outside air sensor for sensing a temperature outside the refrigerator.

Also, the controller may control the defrost heater when the temperature detected by the outside air sensor is equal to or higher than a first predetermined temperature.

A method of controlling a refrigerator according to an embodiment of the present invention includes setting a plurality of control intervals, sensing door opening / closing of the refrigerator in a first control period, storing the detected door opening / closing data in a memory, And analyzing the number of door opening / closing patterns and the pattern based on the data, determining a defrosting point of the second control section based on the analysis, and controlling the defrost heater included in the refrigerator.

The analysis of the door opening / closing pattern may be performed by dividing the first section into a first predetermined number of days and dividing the number of days into a plurality of predetermined statistical sections, Pattern A if the average number of door opening / closing times is equal to or less than a predetermined number, analyzing B pattern if the number of times is less than a predetermined second number, and C pattern if the number of times is more than the second predetermined number.

The control of the defrost heater may include controlling the defrost heater immediately when the pattern A is seen.

In addition, the control of the defrost heater extends the control time point of the defrost heater to the time when the A pattern is seen within the first predetermined time when the B pattern is seen, and when the A pattern is not seen within the preset first time, And controlling the defrost heater.

The control of the defrost heater may be performed by extending the control time point of the defrost heater until the time when the A pattern or the B pattern is displayed within the first predetermined time when the C pattern is displayed, And controlling the defrost heater immediately when the pattern is not seen.

The control of the defrost heater in the Nth section following the second section may include controlling the defrost heater based on data sensed in the (N-1) th section.

In addition, controlling the defrost heater in the first section may include controlling the defrost heater at a second predetermined time interval.

The refrigerator may further include an outside air sensor to determine whether the temperature sensed by the outside air sensor is equal to or higher than a first predetermined temperature. When the sensed temperature of the outside air sensor is equal to or higher than the first temperature, And controlling the defrost heater with the defrost heater.

The refrigerator and its control method according to the present invention can perform the defrosting operation at the optimal defrosting point, thereby improving the internal temperature rise and the improvement in the high-temperature defrosting.

In addition, defrosting can be performed in consideration of adverse influences on the consumer use environment, which is considered to be a phenomenon that occurs naturally when the automatic defrosting function is performed.

1 is a perspective view illustrating an interior of a refrigerator according to an embodiment of the present invention.
2 is a cross-sectional view of a refrigerator according to one embodiment.
3 is a block diagram illustrating a control flow of a refrigerator according to an exemplary embodiment of the present invention.
4 is a diagram illustrating a process of analyzing a door opening / closing pattern and determining a defrosting rush point.
5 is a graph showing an analysis method of a door opening / closing pattern.
6 is a block diagram illustrating a control flow of a refrigerator according to an embodiment of the present invention.
7 is a flowchart illustrating a control method of a refrigerator according to an embodiment.
8 is a flowchart showing a control method of a refrigerator according to another embodiment.
9 is a diagram showing conditions for verifying the effect of the present invention.
FIG. 10 is a view for verifying the effectiveness of the present invention by comparing ratios of the rush-on and rubbing ratios by door opening / closing intervals.
11 is a view showing a result of verifying that the internal temperature has been improved.
Figs. 12 to 15 are diagrams showing the results of verifying that the improvement of the internal-implantation is improved.

The embodiments described herein and the configurations shown in the drawings are merely exemplary embodiments of the present invention, and various modifications may be made at the time of filing of the present application to replace the embodiments and drawings of the present specification.

In this regard, the refrigerator of the present invention includes an electronic refrigerator and an electronic kimchi refrigerator, and should be widely understood as including not only domestic but also industrial applications.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

A refrigerator according to an embodiment of the present invention includes an evaporator, a defrost heater disposed around the evaporator, an input unit configured to set a learning defrosting function of the defrost heater, a door opening / closing unit configured to detect opening and closing of the door of the refrigerator when the learning defrost function is set by the input unit And a controller for counting the number of door opening / closing operations based on the stored data, analyzing the pattern, determining a defrosting time based on the analysis, and controlling the defrost heater.

In addition, the control unit sets a plurality of control intervals, divides the first control interval into a first predetermined number of days, divides the number of days into a plurality of statistical intervals that are set in advance, Pattern A if the number of times is equal to or less than the predetermined number of times, pattern B if the number of times is less than the second predetermined number exceeding the first number, and C pattern if the number of times is more than the second number.

FIG. 1 is a perspective view showing the inside of a refrigerator 1 according to an embodiment, and FIG. 2 is a sectional view of a refrigerator 1 according to an embodiment.

1 and 2, a refrigerator 1 according to an embodiment includes a main body 10, storage chambers 20 and 30 formed inside the main body 10, cool air supplied to the storage chambers 20 and 30, A cold air supply device.

The main body 10 comprises a main body 10 and a main body 10 which are connected to the outside of the inside and the inside of the inside of the storage room 20 and 30 to form an external appearance of the refrigerator 1, . ≪ / RTI >

The storage rooms 20 and 30 can be partitioned into an upper refrigerator compartment 20 and a lower refrigerator compartment 30 by an intermediate partition 11. The refrigerator compartment 20 can be kept at a temperature of about 3 ° C to refrigerate the food and the freezer compartment 30 can be kept at a temperature of about minus 18.5 ° C to freeze and store the food. The refrigerator compartment 20 may be provided with a shelf 23 on which food can be placed and at least one storage box 27 for enclosing the food.

An evaporator 40 for cooling the storage chambers 20 and 30 is installed at the inner rear side of the storage chambers 20 and 30 and a fan 40 for circulating the cool air into the storage chambers 20 and 30 is disposed above the evaporator 40. [ And a defrost heater 93 for removing frost that is conceived on the evaporator 40 may be provided on the lower side of the evaporator 40. [

An ice making chamber 81 capable of producing ice can be formed in the upper corner of the refrigerating chamber 20 so as to be partitioned from the refrigerating chamber 20 by the ice making chamber case 82. Ice is supplied to the ice making chamber 81 An ice making apparatus 80 including an ice tray for manufacturing ice and an ice bucket for storing ice made in the ice tray may be provided.

On the other hand, the refrigerating chamber 20 may be provided with a water tank capable of storing water. The water tank may be provided between the plurality of storage boxes 27 as shown in FIG. 1. However, the water tank may be provided in the refrigerator compartment (not shown) so that the water in the water tank can be cooled by the cold air inside the refrigerator compartment 20 20).

A water tank can be connected to an external water source, such as the water supply, and can store purified water through a water filter. The water supply pipe connecting the external water supply source and the water tank may be provided with a flow path switching valve, and water may be supplied to the ice making device 80 through the flow path switching valve.

The refrigerator compartment 20 and the freezer compartment 30 each have a front face opened to allow food to be delivered and received. The opened front face of the refrigerator compartment 20 includes a pair of rotary doors 21 and 22 hinged to the main body 10, And the opened front face of the freezing chamber 30 can be opened and closed by the sliding door 31 slidable with respect to the main body 10. [

A door opening / closing sensor 32 (a door opening / closing sensor) 32 interlocked with the opening / closing of the doors 21, 22, 31 for sensing the opening / closing of the door is provided at a position where the front surfaces of the refrigerating compartment doors 21, 22 and the freezing compartment door 31 and the storage compartments 20, Is installed.

On the other hand, a door guard 24 for storing food can be provided on the rear surface of the refrigerating compartment doors 21 and 22. When the refrigerating compartment doors 21 and 22 are closed at the rear edge of the refrigerating compartment doors 21 and 22 A gasket 28 may be provided to seal the space between the refrigerating compartment doors 21 and 22 and the main body 10 to intermittently cool the refrigerating chamber 20. One of the refrigerating compartment doors 21 and 22 seals the refrigerating compartment doors 21 and 22 and the refrigerating compartment doors 21 and 22 when the refrigerating compartment doors 21 and 22 are closed, A rotating bar 26 may be provided for interrupting the rotation.

A dispenser 90 is provided in any one of the refrigerating chamber doors 21 and 22 of the refrigerating chamber doors 21 and 22 so as to take out purified water, carbonated water, or ice from the outside without opening the refrigerating chamber doors 21 and 22 .

The dispenser 90 is provided with a dispenser 90 lever that can operate the dispenser 90 so as to discharge the water or ice, such as a cup or the like, through which water or ice can be taken, purified water, carbonated water, And a dispenser 90 nozzle to be discharged.

3 is a block diagram showing a control flow of the refrigerator 1 according to an embodiment. 3, the refrigerator 1 according to an embodiment includes a door open / close sensor 32, a driving unit 91, a fan 92, and a defrost heater 93, A control panel 94 for displaying the operation information of the refrigerator 1, a memory 98 for storing a program and data for controlling the refrigerator 1, and a controller 99 for collectively controlling the operation of the refrigerator 1 .

The description of the door opening / closing sensor 32, the fan 92, and the defrost heater 93 described above will be omitted.

The driving unit 91 drives the fan 92, the defrost heater 93, and the like in accordance with the drive control signal of the control unit 99.

The control panel 94 receives a tentative command of the refrigerator 1 from the user and displays the operation information of the refrigerator 1 to the user. The control panel 94 includes an input unit for receiving a user's operation command and a display unit for displaying operation information of the refrigerator 1. The control panel 94 includes a defrost command input unit for receiving a user's command regarding defrosting of the refrigerator 1, And a defrosting information display unit for displaying operation information relating to defrosting of the defrosting unit (1).

The defrosting command input unit receives a defrosting activation command for activating defrosting operation and a defrosting deactivation command for deactivating defrosting operation from the user. The input unit including the defrosting command input unit may employ a pressure switch or a touch pad.

The defrosting information display unit displays a pattern analysis display area for displaying the result of analyzing the pattern of the number of door opening and closing times of the refrigerator 1, a defrosting time display area for indicating the next defrosting time point according to the pattern analysis result, And a defrost condition display area. A liquid crystal display (LCD) panel or a light emitting diode (LED) panel may be used as the display unit for displaying the defrost information display unit.

Although the control panel 94 of the refrigerator 1 according to the embodiment is provided separately from the input unit and the display unit, the present invention is not limited thereto and may adopt a touch screen panel (TSP) having an input unit and a display unit . Further, it is possible to input an input command within a range that can be designed by a person having ordinary skill in the art, and may further include another display area.

The memory 98 stores programs and data for controlling the refrigerator 1, for example, information on defrosting patterns according to the number of door opening and closing operations.

In the case of this embodiment, when the cumulative average door opening / closing count of each statistical section during the first predetermined number of days is equal to or less than the predetermined first number, the pattern A, the B pattern if the first number is less than the predetermined second number, It can be stored in advance so as to be set as a C pattern. In addition, the memory 98 may temporarily store the measured information when measuring the number of door opening / closing operations of the refrigerator 1. [

The control unit 99 receives the data sensed by the door open / close sensor 32, counts the number of times the door is opened and closed, analyzes the door open / close pattern to determine the defrosting time, and controls the defrost heater 93 and the like.

Hereinafter, the analysis of the door opening / closing pattern of the controller 99 and the determination of the defrosting start time will be described in more detail.

FIG. 4 illustrates a process of analyzing a door opening / closing pattern and determining a defrosting start time, and FIG. 5 is a graph illustrating a method of analyzing a door opening / closing pattern.

Referring to FIGS. 4 and 5, the controller 99 analyzes the cumulative average door opening / closing number and pattern thereof for each section, and determines a section showing a pattern with a small number of door opening / closing times as a defrosting start time according to the analysis result.

This is because, when defrosting is carried out instantaneously when the temperature inside the storage chambers 20, 30 is increased by use of the user, the temperature is increased and the temperature of the food is raised and congestion occurs in the inside of the storage chambers 20, 30, This is because it can cause discomfort.

More specifically, a plurality of control intervals are set to divide a first control interval of a plurality of control intervals into a first predetermined number of days, and each day is divided into a plurality of preset statistical intervals.

In FIG. 4, the door opening / closing pattern is analyzed in a case where the first section divided by one week is divided into the seventh day, and the days are divided into one hour unit, thereby dividing the total into 24 statistical sections.

In this embodiment, when the number of door opening / closing times is cumulatively averaged for 7 days for each statistical interval, the A pattern is determined if the accumulated number of door opening / closing times is equal to or less than the first predetermined number, the B pattern if the accumulated number is less than the predetermined second predetermined number, If it is more than the second number, it is analyzed in C pattern. That is, the pattern A has the smallest number of door opening / closing times, the pattern B has the number of door opening / closing times in the middle, and the C pattern has the largest number of door opening / closing patterns.

FIG. 5 shows a case where the door opening / closing pattern is analyzed by taking the case where the first number is 0.5 and the second number is 2.2, for example. In FIG. 4, as an example of analyzing the door opening / closing pattern according to the standard shown in FIG. 5, Explain how to determine the point of view. On the other hand, the first number and the second number are not limited to the reference shown in Fig. 5, and can be changed within a range that can be designed by a person having ordinary skill in the art.

When the analysis of the door opening / closing pattern is completed for each statistical section in the above manner, the controller 99 determines a defrosting start point based on the above pattern.

That is, the controller 99 immediately controls the defrost heater 93 to perform the defrosting when the pattern A is seen. When the B pattern is displayed, the control point of the defrost heater 93 is extended to the time when the A pattern is seen within the first predetermined time, and when the A pattern is not seen within the preset first time, the defrost heater 93 To perform defrosting. When the C pattern is displayed, the control point of the defrost heater 93 is extended until the time when the A pattern or the B pattern is displayed within the first predetermined time, and when the A pattern or the B pattern is not displayed within the preset first time, The defrost heater 93 is controlled to perform defrosting.

More specifically, the statistical sections 3-4, 9-10, and 22-23 are sections where the doors of the refrigerator (1) are frequently opened and closed, and the cumulative average door opening / see. The C pattern generally appears at mealtimes when the number of door opening / closing is frequent.

Also, the statistical section 17-21 is a section in which the door of the refrigerator 1 is hardly opened or closed, and the number of cumulative average door opening / closing times of the corresponding section is less than 0.5 times for 7 days. The A pattern usually appears in the early morning hours of sleep.

The defrosting rush is based on the analyzed pattern. In other words, the existing defrosting point is located in the statistical sections 3, 8, 15, and 21. In the statistical section 3, it is expected that the door opening / closing pattern shows the C pattern and the B pattern is displayed within the preset 3 hours. And the defrosting is performed. Also, the statistical interval 8 shows the C pattern, but it is not expected to show the A or B pattern within the preset 3 hours, so the defrosting is performed immediately. In addition, since the statistical interval 15 shows the pattern B and the pattern A is expected to be displayed within the preset 3 hours, the defrosting time is extended to the statistical period 17 to perform defrosting. In addition, since the statistical section 21 shows pattern A, defrosting is performed immediately.

Next, the refrigerator 1 according to another embodiment of the present invention will be described in detail.

6 is a block diagram showing a control flow of the refrigerator 1 according to another embodiment. Referring to FIG. 6, the refrigerator 1 according to another embodiment includes a sensor unit 105, which further includes an ambient air sensor 100 in addition to the components shown in FIG.

Hereinafter, for the sake of convenience of description, redundant description of the door opening / closing sensor 32, the driving unit 91, the fan 92 and the defrost heater 93, the control panel 94 and the memory 98 will be omitted, 99 will be described in detail.

The control unit 99 according to another embodiment is the same as the control unit 99 according to the embodiment except that when the temperature of the average room temperature sensed by the ambient air sensor 100 is equal to or higher than a predetermined first temperature There is a difference in that the above control is performed. To perform effective defrost control, it is preferable that the first temperature is set to 22 deg.

When the outside air temperature is below a certain temperature, the degree of temperature rise inside the inside of the storage compartment that occurs at the same time as opening and closing the door is not so large, and the effect of controlling the defrosting according to the pattern is analyzed. It may take a load. Accordingly, defrosting is performed only when the temperature of the room temperature sensed by the outside air sensor 100 is equal to or higher than a first predetermined temperature, thereby preventing such a problem.

Next, a control method of a refrigerator according to an embodiment of the present invention will be described in detail.

According to an embodiment of the present invention, when the learning defrost function of the refrigerator 1 is set, a plurality of control periods are set, the door opening / closing of the refrigerator 1 is sensed in the first control period, The number of door opening / closing times and the pattern thereof are analyzed based on the data, the defrosting time point of the second control section is determined based on the analysis, and the defrost heater (not shown) included in the refrigerator 1 93).

In analyzing the door opening / closing pattern, the first control period is divided into a first predetermined number of days, the first number of days is divided into a plurality of statistical intervals set in advance, and the cumulative average door opening / Pattern A if the first number of times is less than the first predetermined number, B pattern if the first number is less than the second number, and C pattern if the second number is more than the second number. The control method for each pattern is the same as described above, and a duplicate description will be omitted.

On the other hand, controlling the defrost heater 93 in the Nth control period subsequent to the second control period includes controlling the defrost heater 93 based on the data sensed in the (N-1) th control period. That is, the data related to the door opening / closing sensed at the same time as the defrosting of the previous control period is used as a basis for determining the defrosting time point of the next control period.

In the first control section, there is no previous door opening / closing data, and controlling the defrost heater 93 in the first control section includes controlling the defrost heater 93 at a second predetermined time interval do.

7 is a flowchart illustrating a control method of a refrigerator according to an embodiment.

Hereinafter, for convenience of description, each control section is divided at intervals of one week when a plurality of statistical sections are set, and one week is divided by one unit, and a day is divided and divided into statistical sections of one hour, The control method of the refrigerator will be described by taking the case where the time is set to 3 hours as an example.

In more detail, the first control period is divided into a weekly interval, and the first day is divided into a seven-day interval and a one-hour interval, And the defrosting is performed at intervals of 3 hours during the defrosting of the first section where there is no previous data relating to door opening and closing. However, this is merely an example for effectively performing defrost control of the refrigerator 1, and the interval and the time setting can be changed within a range that can be easily designed by a person having ordinary skill in the art.

Referring to FIG. 7, when a user inputs a defrosting command through an input unit of a control panel 94 provided on the front of the refrigerator 1, a control method of the refrigerator according to an embodiment is performed.

When a defrosting command is inputted, a period of one week unit is set to perform control of the refrigerator 1, and a defrosting of the existing defrosting mode is performed in the first control period (205, 210). At the same time, door opening / closing is sensed through the door open / close sensor 32 in the first control period, and data related to door opening / closing is stored in the memory 98 (220).

If one week has not elapsed since the above process is performed, the defrosting is continued in the first control period, and the door opening / closing detection result is accumulated (230).

When one week has elapsed from the above process, the number of door opening / closing operations and the pattern thereof are analyzed 240 based on the data stored in the memory 98.

In the case of the same pattern as that of the conventional defrosting method by analyzing the above pattern, defrosting in the same manner as the existing defrosting method is performed when defrosting the second control period following the first control period.

However, in the case of the new defrosting mode adoption pattern, the defrosting time is determined by the defrosting pattern of the new type at the time of defrosting the second control period subsequent to the first control period, so that the defrosting start time is determined and the defrosting is performed (250, 260).

In the second control period, the defrosting mode determined according to the above process is adopted. The above process is repeated until the user inputs an active defrost stop command through the input unit of the control panel 94 (270).

8 is a flowchart illustrating a control method of a refrigerator according to another embodiment of the present invention.

Referring to FIG. 8, the method for controlling a refrigerator according to another embodiment differs from the method for controlling a refrigerator shown in FIG. 6 in that it further includes determining an average room temperature before analyzing a door opening / closing pattern.

That is, in the refrigerator control method according to the present embodiment, the refrigerator 1 further includes the ambient air sensor 100, and based on the data sensed by the ambient air sensor 100 after 230, It is determined whether the room temperature is equal to or higher than the first temperature (233, 236).

If it is determined that the temperature is higher than the first temperature, the door opening / closing pattern is analyzed. If it is determined that the temperature is lower than the first temperature, defrosting is performed in a conventional defrosting mode (210, 240).

The reason for adding the process of determining the average room temperature is to analyze the number of door opening / closing operations and to perform defrosting according to the pattern because the degree of temperature rise inside the storage compartment that occurs at the same time as the door opening / This is because the effect is insignificant and the refrigerator 1 may be subjected to an excessive load, which is described above.

At this time, it is preferable that the first temperature for performing the effective defrost control is set to 22 deg.

Hereinafter, the effects of the refrigerator 1 and the control method thereof according to the present invention will be described in detail.

FIG. 9 is a view showing a condition for verifying the effect of the present invention, FIG. 10 is a view for verifying the effectiveness of the present invention by comparing ratios of defrosting rushes by door opening / closing intervals, and FIG. 11 And FIGS. 12 to 15 are diagrams showing the results of verifying the improvement of the internal-implantation. FIG.

The SBS refrigerator (RS84GRPC) was used as a model for verifying the effect of the present invention, and the effect of the present invention was verified by dividing the number of door opening / closing operations into three patterns in the SBS refrigerator (1).

9A, Case 1 shows a case where the average number of door opening / closing times is 61.7, Case 2 is a case where the average number of door opening / closing times is 111.7, Case 3 is a case where the average door opening / closing number is 24 In Case 2, the number of door opening / closing is the largest, and in Case 3, the number of door opening / closing is the smallest.

Referring to FIG. 9 (b), when the door opening / closing pattern per hour is recognized for each case, the A pattern is shown when the 7-day cumulative average door opening / closing frequency is less than 0.5, If it is more than one, set it to be recognized as C pattern.

Next, the day is divided into 24 time sections and divided into 24 statistical sections, and the door opening / closing pattern according to each section is analyzed for each case, and the result as shown in (c) of FIG. 9 is obtained. Accordingly, the control method of the refrigerator according to the present invention is applied to each case to verify its effect.

Referring to FIG. 10, it is possible to compare ratios of defrosting rushes by door opening / closing intervals for each case. The first parking means the rate of time when the conventional technology is applied, and the second means the rate of time when the door is opened and closed when the technical idea of the present invention is applied.

In Case 1, for example, when the pattern A is seen, the time to start defrosting was 64% in the first and 100% in the second. In the case of C pattern, The ratio of the first and the second car decreased to 36% and 0%, respectively. This means that 100% defrosting is performed in a section where the number of times of opening and closing of the door of the refrigerator (1) of the consumer is small, and as a result, it is possible to prevent an excessive temperature rise in the oven.

In cases 1 to 3, when the pattern A was seen, the time to start defrosting was 32% in the first and 69% in the second, 37% Of the first week, 21% in the first week, 27% in the second week, and 6% in the second week. In the case of C pattern, And 4%, respectively.

From the above results, it can be seen that the time point at which the defrosting operation is started is shifted to the section where the door opening / closing frequency of the refrigerator 1 is small through the refrigerator 1 and the control method according to the technical idea of the present invention.

Next, referring to FIG. 11, it can be confirmed that the temperature in the hearth is improved by applying the refrigerator 1 of the present invention and the control method thereof. That is, when the maximum in-door temperature of each door opening / closing time period of a user who has a poor cold-proofing and a faulty in-installation is compared, the result shown in FIG. 11 can be obtained.

11 is a comparison between the improvement rates of the inside temperature rise of the freezing compartment 30 and the freezing compartment 20 with respect to the cases 1 and 2. The reference temperatures of the freezing compartment 30 and the freezing compartment 20 are set differently for the cases 1 and 2 The improvement rate of the internal temperature rise per reference temperature was compared.

When the reference temperature of the freezing compartment 30 was set at minus 16 캜, the temperature improvement rate of Case 1 was 89.36% and that of Case 2 was 11.47%. On the other hand, when the reference temperature of the freezing compartment 30 was set to minus 13.5 캜, the temperature improvement rate of 0% was shown in Case 1, and the temperature improvement rate of 70.22% in Case 2. Taken together, it can be confirmed that the temperature improvement rate is 89% when the reference temperature of the freezing chamber 30 of the case 1 is set to minus 16 캜.

In the same manner, when the reference temperature of the refrigerator compartment 20 of the case 1 is set to 4 ° C, the temperature improvement rate is 88.48%. When the reference temperature of the freezer compartment 30 of the case 2 is set to minus 13.5 ° C, And a temperature improvement rate of 60.00% is obtained when the reference temperature of the refrigerating chamber 20 of the case 2 is set to 6.2 캜.

It is preferable that the reference temperature of the freezing compartment 30 is set at minus 16 ° C and the reference temperature of the refrigerating compartment 20 is set at 4 ° C in case of case 1, Is set to minus 13.5 deg. C and the reference temperature of the refrigerating chamber 20 is set to 6.5 deg.

That is, when the reference temperature is set as described above, it is confirmed that the improvement rate of the internal temperature is high at the time of the occurrence of the poor cooling and the failure of the internal fixation. More specifically, in the case of the freezing chamber 30, , It was confirmed that the maximum internal temperature was decreased by 2 ° C.

Next, referring to FIGS. 12 to 15, it can be confirmed that the degree of implantation in the cavity is improved by applying the refrigerator 1 of the present invention and its control method.

12 is a view for showing the temperature rise in the power source and the oven due to the time of starting the defrosting operation and the opening and closing of the door, wherein the abscissa axis in Fig. 12 means time and the ordinate axis means the strength and the internal temperature of the power source applied to the refrigerator 1 . The G2 graph shows the temperature change of the refrigerating chamber 20 when the door of the refrigerating chamber 20 of the refrigerator 1 is opened and closed. (30) during the opening and closing of the door of the freezing chamber (30) of the freezing chamber (1).

Referring to G1, it can be seen that the power of the power source is rapidly increased at the time of the rushing of the defrosting, and when referring to G2 and G3, it can be confirmed that the temperature in the ridge rises sharply at the time of door opening / closing. That is, when the defrosting is performed or the door of the refrigerator 1 is opened or closed, an increase in the temperature of the oven is caused, and water vapor is introduced into the oven.

Fig. 13 shows a state in which sexuality is implanted in the hips at the time of protrusion rush as shown in G1. Referring to FIG. 13, it can be seen that the deflagration is congested in the high temperature at the time of the inflow of the defrost. This is because the heat flow by the defrost heater 93 and the fan 92 is generated at the time of inflow of the defrosting, .

However, the implantation due to the defrosting is sublimated and removed naturally after a certain time elapses after the defrosting operation. However, when the defrosting operation is started at the time of opening and closing the door of the refrigerator 1,

Fig. 14 is a view showing the case where the defrosting operation is intensified due to frequent opening and closing of the door due to frequent opening and closing of the door in Case 2, Fig. 15 is a case of Case 3 and the door opening / closing frequency is relatively small, FIG. 5 is a view showing a state in which the implantation of the defects is improved by avoiding the penetration of the defrosting.

In this manner, learning of the door opening / closing pattern and avoiding the rush of the defrosting at the time when door opening /

1: Refrigerator 10: Body
20, 30: storage room (refrigerator, freezer) 32: door opening / closing sensor
40: evaporator 91:
92: Fan 93: Defrost heater
94: Control Panel 98: Memory
99: control unit 100: outdoor sensor
105:

Claims (15)

evaporator;
A defrost heater disposed around the evaporator;
An input unit configured to set a learning defrost function of the defrost heater;
A door open / close sensor for detecting door opening / closing of the refrigerator when the learning defrost function is set by the input unit;
A memory for storing data on the sensed door opening / closing; And
And a controller for counting the number of door opening / closing operations based on the stored data, analyzing the pattern, determining a defrosting time based on the analysis, and controlling the defrost heater. The method according to claim 1,
Wherein,
A plurality of control intervals are set, a first control interval is divided into a first predetermined number of days, each of the days is divided into a plurality of preset statistical intervals,
If the average number of door opening / closing times accumulated during the first day of each statistical period is less than a first predetermined number, the pattern A is analyzed. If the number of times is less than the second predetermined number, the pattern B is analyzed. The refrigerator. 3. The method of claim 2,
Wherein,
A pattern, the defrost heater is controlled immediately. 3. The method of claim 2,
Wherein,
The controller controls the defrost heater immediately when the A pattern is not seen within a predetermined first time by extending the control point of the defrost heater until the A pattern is seen within a first predetermined time when the B pattern is displayed. 3. The method of claim 2,
Wherein,
C pattern is displayed, the control point of time of the defrost heater is extended to the time when the A pattern or the B pattern is displayed within the first predetermined time, and when the A pattern or the B pattern is not displayed within the preset first time, Controlled refrigerator. The method according to claim 1,
And an outside air sensor for sensing a temperature outside the refrigerator. The method according to claim 6,
Wherein,
Wherein the controller controls the defrost heater when the temperature sensed by the outside air sensor is equal to or higher than a first predetermined temperature. Setting the learning defrost function of the refrigerator to a plurality of control intervals;
Detecting opening and closing of the door of the refrigerator in the first control period;
Storing the sensed data related to door opening and closing in a memory;
Analyze the number of door opening and closing operations and the pattern thereof based on the data;
Determining a defrosting point of the second control section based on the analysis, and controlling a defrost heater included in the refrigerator. 9. The method of claim 8,
The analysis of the door opening /
Wherein the first interval is divided into a first number of days set in advance and the number of days is divided into a plurality of statistical intervals,
If the average number of door opening / closing times accumulated during the first day of each statistical period is less than a first predetermined number, the pattern A is analyzed. If the number of times is less than the second predetermined number, the pattern B is analyzed. And controlling the refrigerator. 10. The method of claim 9,
To control the defrost heater,
A pattern is displayed, the defrost heater is controlled immediately. 10. The method of claim 9,
To control the defrost heater,
The controller controls the defrost heater immediately when the control point of time of the defrost heater is extended within a first predetermined time when the pattern A is visible and the pattern A is not seen within a predetermined first time . 10. The method of claim 9,
To control the defrost heater,
C pattern is displayed, the control point of time of the defrost heater is extended to the time when the A pattern or the B pattern is displayed within the first predetermined time, and when the A pattern or the B pattern is not displayed within the preset first time, Controlling the refrigerator. 9. The method of claim 8,
The control of the defrost heater in the Nth section subsequent to the second section may include:
And controlling the defrost heater based on the sensed data in the (N-1) th section. 9. The method of claim 8,
Controlling the defrost heater in the first section includes:
And controlling the defrost heater at a second predetermined time interval. 9. The method of claim 8,
The refrigerator may further include an ambient air sensor,
Further comprising determining whether a temperature sensed by the outdoor sensor is equal to or higher than a first predetermined temperature,
And controlling the defrost heater when the detected temperature of the outdoor air sensor is equal to or higher than the first temperature.

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