WO2020144847A1

WO2020144847A1 - Refrigerator

Info

Publication number: WO2020144847A1
Application number: PCT/JP2019/000684
Authority: WO
Inventors: 牧人冨村; 康成大和
Original assignee: 三菱電機株式会社
Priority date: 2019-01-11
Filing date: 2019-01-11
Publication date: 2020-07-16
Also published as: AU2019420355B2; CN113227685B; CN113227685A; JP7038856B2; TWI717938B; JPWO2020144847A1; TW202026578A; SG11202104529VA; AU2019420355A1

Abstract

This refrigerator is provided with a storage chamber, a door opening/closing detection unit, a memory unit, and a control unit, wherein the control unit: calculates an arbitrarily-defined day-number average value from a door opening/closing count stored in the memory unit in each arbitrarily-defined unit of time; calculates an immediately-preceding total value by using as a start point each unit of time, in the arbitrarily-defined day-number average value; calculates an immediately-following total value by using, as a start point, each unit of time, in the arbitrarily-defined day-number average value; and determines, on the basis of the immediately-preceding total value and/or the immediately-following total value, an interval which is defined by a preset time duration and in which the frequency of opening/closing of the storage chamber is low.

Description

refrigerator

The present invention relates to a refrigerator having a door that can be opened and closed, a storage room that stores stored goods and whose temperature is adjusted, and a door opening/closing detection unit.

In the conventional refrigerator, the number of times the doors of the ice making chamber doors stored for 7 days were added every hour, and the ice making capacity was switched according to the number of times the doors were opened per unit time. For example, when the number of times the door is opened is less than 5 times per hour, which is a time period in which the door is open, it is determined that the amount of ice used is small, and the refrigerator is operated with a low ice making capacity. In addition, the refrigerator is operated with the medium ice-making capacity in a time period in which the number of times of opening the door is slightly high, such as 5 times or more and less than 15 times per hour. Then, the refrigerator is operated with a high ice-making capacity, for example, 15 times or more per hour, which is a time period when the number of times of opening the door is large. In this way, wasteful cooling is suppressed by operating the refrigerator according to the usage situation of the user (for example, refer to Patent Document 1).

In other conventional refrigerators, 24 hours a day are subdivided into predetermined times, for example, 1 hour intervals, and the number of times the refrigerator door is opened and closed is summed up for each section time. Then, the section time when the refrigerator is not used, the section time when the refrigerator is used, and the section time when the refrigerator is used but the use frequency is low are determined, and the defrosting operation is performed in the section time when the refrigerator is not used ( See, for example, Patent Document 2).

JP, 2017-15344, A JP-A-5-248756

In the method of operating the refrigerator according to the use situation of the user according to the number of times of opening the door of the technique of Patent Document 1, for example, when the user suddenly wakes up when the user is asleep and opens and closes the refrigerator, the door can be opened and closed even at midnight. The number of times is recorded. As a result, it is not possible to determine a cohesive section time with a low frequency of use, for example, about 6 hours. Then, when it is desired to execute the control for a plurality of hours, for example, 4 hours, there is a possibility that the control is interrupted midway.

Also, in the technique of Patent Document 1, a threshold value used for determining whether the frequency of use is high or low is set according to the number of times the door is opened. For this reason, if there is a difference in the absolute value of the number of times of opening the door in each user's daily life, the accuracy may not be as intended. For example, it is assumed that the user A opens the door at most about 5 times per unit time. On the other hand, it is assumed that the user B reaches the maximum number of times of opening the door about 15 times per unit time. Here, if the threshold value is set such that the frequency of use is high when the number of times of opening the door is 10 or more, it may be determined that the frequency of use is always low for user A throughout the day. Further, when the usage frequency changes every unit time, the operating state changes every moment, which may deteriorate the energy consumption performance.

In the driving method according to the use situation of the user according to the number of times of opening the door of the technology of Patent Document 2, in the case of a double-income household which has been seen in recent years and the like in which the day shifter and the night shifter are mixed, the door can be opened and closed at night. Not a little done. As a result, there are cases where it is difficult to find a time period when the refrigerator is not used for a plurality of hours. Then, there is a possibility that the defrosting operation or the like, which is performed during the time period when the refrigerator is not used, cannot be performed throughout the day.

　These problems are due to the fact that it was not possible to predict the arbitrary time period in which the frequency of use of the user is low according to the living situation of the user.

The present invention is intended to solve the above problems, and an object of the present invention is to obtain a refrigerator in which an arbitrary time period in which a user is less frequently used can be predicted according to the living situation of the user.

The refrigerator according to the present invention has a door that can be opened and closed, a storage room that cools and stores stored items, a door opening and closing detection unit that detects opening and closing of the door of the storage room, and the door opening and closing detection unit detects A storage unit for storing the number of times of opening and closing the door for each arbitrary unit time for an arbitrary number of days, and a control unit, wherein the control unit opens and closes the door for each arbitrary unit time stored in the storage unit. From the number of times, an average value between arbitrary days, which is the average of the number of times of opening and closing the door in each unit time during the arbitrary number of days, is calculated, and each unit time in the average value between the arbitrary days is used as a starting point until the set time Of the number of times of opening and closing of the door is calculated for each unit time, and the latest total value is calculated, and the number of times of opening and closing of the door is set for each unit time after a set time from each unit time in the average value between the arbitrary days as a starting point. The summed immediately following total value is calculated, and based on one or both of the most recent total value and the immediately following total value, a section having a small opening/closing frequency of the storage chamber divided by the set time is determined.

According to the refrigerator of the present invention, the control unit determines, based on one or both of the most recent value and the immediately following total value, a section in which the opening/closing frequency of the storage chamber divided by the set time is small. Therefore, an arbitrary time period in which the frequency of use by the user is low can be predicted according to the living situation of the user.

It is a perspective view which shows the refrigerator which concerns on Embodiment 1 of this invention. It is a front view which shows the refrigerator which concerns on Embodiment 1 of this invention. It is a functional block diagram which shows the refrigerator which concerns on Embodiment 1 of this invention. It is a block diagram which shows the control part which concerns on Embodiment 1 of this invention. 3 is a flowchart showing control according to the first embodiment of the present invention. It is explanatory drawing which shows the control result 1 which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the control result 2 which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the control result 3 which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the special temperature control which concerns on Embodiment 1 of this invention. 5 is a flowchart showing special temperature control according to the first embodiment of the present invention. It is explanatory drawing which shows the special temperature control of redoing which concerns on Embodiment 1 of this invention. It is explanatory drawing which shows the temperature averaging control which concerns on Embodiment 1 of this invention.

An embodiment of the present invention will be described below with reference to the drawings. In each drawing, the same reference numerals are the same or equivalent to each other, and this is common to all the texts of the specification. Further, in the drawings of the cross-sectional views, hatching is omitted as appropriate in view of visibility. Furthermore, the forms of the constituent elements shown in the entire text of the specification are merely examples, and the present invention is not limited to these descriptions.

Embodiment 1.
FIG. 1 is a perspective view showing a refrigerator 1 according to Embodiment 1 of the present invention. FIG. 2 is a front view showing the refrigerator 1 according to Embodiment 1 of the present invention.

As shown in FIGS. 1 and 2, the refrigerator 1 includes a refrigerating room 121, an ice making room 122, a freezing room 123, a freezing room 124, and a vegetable room 125. The freezing compartment 123 is switched to a temperature range of -18 degrees, which is a freezing temperature zone, or -7 degrees, which is soft freezing. The refrigerating room 121, the ice making room 122, the freezing room 123, the freezing room 124, and the vegetable room 125 are storage rooms 12 that have openable and closable doors and cool and store foods and the like that are stored items. The refrigerator 1 may include at least one or more storage rooms 12. Moreover, when the refrigerator 1 has a plurality of storage chambers 12, the plurality of storage chambers 12 may be arranged in any manner.

The refrigerator 1 includes a door switch 131 that is turned on and off by opening and closing the doors of the refrigerating room 121, the ice making room 122, and the freezing room 123. The refrigerator 1 includes a door switch 132 that is turned on or off by opening and closing the door of the freezer compartment 124. The refrigerator 1 includes a door switch 133 that is turned on or off by opening and closing the door of the vegetable compartment 125. The door switch 131, the door switch 132, and the door switch 133 configure a door opening/closing detection unit 13 that detects opening/closing of the door of the storage chamber 12.

FIG. 3 is a functional block diagram showing the refrigerator 1 according to the first embodiment of the present invention. As shown in FIG. 3, the refrigerator 1 includes a door opening/closing detection unit 13 that detects opening/closing of the door of the storage room 12. The refrigerator 1 includes a storage unit 111 that receives a door opening signal transmitted from the door opening/closing detection unit 13 and stores the number of times of opening/closing of the door for each arbitrary unit time for an arbitrary number of days. The refrigerator 1 includes a control unit 11. The control unit 11 includes a storage unit 111. The refrigerator 1 includes a cooler 14 that cools the insides of the plurality of storage chambers 12. The refrigerator 1 includes a defrost heater 15 that defrosts the cooler 14.

<Control unit 11>
FIG. 4 is a block diagram showing the control unit 11 according to the first embodiment of the present invention. The control unit 11 controls the drive device of the cooler 14, the defrost heater 15, and the like. As shown in FIG. 4, the control unit 11 is a processing circuit having a microcomputer including a CPU, memories such as ROM and RAM, and input/output devices such as I/O ports. The storage unit 111 is composed of a RAM.

The control unit 11 is an average of the number of times of opening and closing the door per hour, which is an arbitrary number of days, from the number of times of opening and closing the door, which is an arbitrary unit time, stored in the storage unit 111. The 7-day average value, which is the average value between arbitrary days, is calculated. The control unit 11 calculates the latest total value obtained by summing the number of times of opening and closing the door for each hour up to 6 hours before the set time, starting from each 1 hour in the 7-day average value. The control unit 11 calculates the total value immediately after summing the number of times of opening and closing the door up to 6 hours after the start of each hour in the average value for 7 days for each unit time. The control unit 11 determines a section in which the opening/closing frequency of the storage chamber 12 divided into 6 hours is small, based on one or both of the latest total value and the immediately following total value.

<Control of living situation analogy>
FIG. 5 is a flowchart showing the control according to the first embodiment of the present invention. As shown in FIG. 5, the control unit 11 stores the number of times of opening and closing the door per unit time in the storage unit 111 in step S1. The control unit 11 divides a day into 0 blocks to 23 blocks for a total of 24 blocks every hour, and stores the number of times the door is opened in each block in the storage unit 111 for each door. Step S1 is executed until the data for 7 days is stored. When it exceeds 7 days, the control unit 11 overwrites the oldest data in order and stores it in the storage unit 111. The control unit 11 repeats the storage process of step S1 to always store the latest number of door opening/closing times for each storage room for 7 days in the storage unit 111.

Basically, it is preferable to divide this memory processing into unit time of 1 hour unit. As a result, the living conditions of the user can be sufficiently analogized. However, if it is desired to analyze a more detailed door opening/closing frequency, the unit time may be set in units of 30 minutes. Further, when a rougher door opening/closing frequency is analyzed in consideration of the memory capacity of the storage unit 111, the unit time may be set in units of 8 hours.

The control unit 11 calculates an average value of the number of times of opening and closing the door every 7 hours for 7 days in step S2. ‥

The control unit 11 stores the number of times the door has been opened for 24 hours from 0 block to 23 blocks per day with the unit time being 1 hour. Here, the control unit 11 finishes storing the number of times of opening the door to the 23 blocks in the storage unit 111, and at the timing of moving the storage location to the 0th block of the next day, the door opening of each storage chamber 12 is performed for each block. Sum the number of times.

Specifically, the 0th block of the refrigerating room 121, the 0th block of the ice making room 122, the 0th block of the freezing room 123, the 0th block of the freezing room 124, and the 0th block of the vegetable room 125. Sum the number of doors opened. The same calculation is performed from the remaining 1st block to the 23rd block.

Next, the control unit 11 multiplies the 7-day average value of 0 blocks to 23 blocks, which has been calculated in the past, for 7 days by 6, and adds the number of times the door has been opened for the latest 1 day calculated for each block. , And the addition result is divided by 7. The control unit 11 stores the calculation result in the storage unit 111 as the latest 7-day average value.

The initial value of the 7-day average value is set in advance in the storage unit 111 in preparation for the timing of shifting from the first 23 blocks after turning on the refrigerator 1 to 0 block on the next day. Basically, it is preferable to set all the initial values to 0. However, for example, the initial value of the 7-day average value may be set with reference to general household opening/closing frequency data rather than market data.

Note that the initial value may be set to a value such as the number of switching operations that cannot occur in actual use, for example, 10,000 times. However, if the initial value greatly deviates from the actual use purpose, extra time is required until the actual use frequency can be estimated, which is not preferable.

In step S3, the control unit 11 calculates the latest total value which is the total value of the number of times of opening the door 6 hours before the set time, that is, 6 blocks before, starting from each block of the average value for 7 days. Here, the set time is set to 6 hours in order to carry out the control for a maximum of 6 hours which will be described later in that time zone after estimating the time zone in which the usage frequency is low.

FIG. 6 is an explanatory diagram showing a control result 1 according to the first embodiment of the present invention. FIG. 7 is an explanatory diagram showing a control result 2 according to the first embodiment of the present invention. FIG. 8 is an explanatory diagram showing the control result 3 according to the first embodiment of the present invention.

The latest total value will be explained using FIG. 7. In FIG. 7, the horizontal axis represents the unit time from 0 block to 23 blocks, and the vertical axis represents the number of times of door opening of the 7-day average value in each unit time. In the case of the total value of the 0th block for the last 6 hours, the number of times of opening the 0th block as the starting point is 0 times, the number of times of opening the 23rd block one block before is 0 times, and the 22nd block before 2nd block is 22 times. No. of doors opened 0 times, No. of doors opened 21st block before 3 blocks, No. of doors opened 20th block before 4 blocks, No. of doors opened 19th block before 5 blocks 3 The total value of 6 blocks is 3 times. The same calculation is performed for each of the remaining 1 to 23 blocks, and the latest 6-hour total value is calculated for all 24 blocks.

In step S4, the control unit 11 compares the calculation results of the latest total value and determines whether or not the minimum value of the number of times of opening and closing the door is one. When the minimum value of the number of times of opening and closing the door is one, the process proceeds to step S5. When the minimum value of the number of times of opening and closing the door is plural, the process proceeds to step S6.

In step S5, the control unit 11 sets the interval of 6 hours before the set time of the block having the minimum number of times of opening and closing the door, that is, from the block 6 blocks before to the block 1 block before the refrigerator 1 It is judged that it is a time when the use frequency of is low. That is, as shown in FIG. 6, when the latest 6-hour total value of the third block is one as the minimum value, the control unit 11 determines the sixth block from the 21st block to the 3rd block. It is determined that 6 hours until the second block, which is the immediately preceding block, is a section time zone in which the refrigerator 1 is used less frequently. That is, when the minimum value of the latest total values is one, the control unit 11 uses the start time of the third block, which is one first unit time when the latest total value of the minimum values is calculated, as a reference for the three blocks. It is determined that the interval between the opening time of 6 hours and the starting time of the third block is the interval in which the opening/closing frequency of the storage chamber 12 is low.

In step S6, the control unit 11 calculates a total value immediately after, which is the total value up to 6 blocks after 6 hours, which is an arbitrary time, starting from each block of the average value for 7 days. Specifically, as shown in FIG. 7, the calculation of the 6-hour total value immediately after the 0th block is performed by setting the number of times of opening the 0th block as the starting point to 0 times and opening the 1st block after 1 block. The number of times of opening is 0, the number of times of opening of the second block after 2 blocks is 0, the number of times of opening of the third block after 3 blocks is 0, and the number of times of opening of the fourth block after 4 blocks is 3 times. After 5 blocks, the total number of times of opening the door of the 5th block 8 times, 6 blocks in total, is 11 times. The control unit 11 performs the same calculation for each of the remaining 1 block to 23 blocks, and calculates the immediately following 6-hour total value for all 24 blocks.

In step S7, the control unit 11 determines whether or not the maximum value of the 6-hour total value immediately after that block is one among the plurality of blocks having the minimum 6-hour total value. When the maximum value of the number of times of opening and closing the door is 1, the process proceeds to step S5. When the maximum number of times of opening and closing the door is plural, the process proceeds to step S8.

In step S5 transferred from step S7, the control unit 11 selects, from among the plurality of blocks having the smallest latest 6-hour total value, the block whose maximum 6-hour total value immediately after that block is one, It is determined that the interval up to 6 hours before the arbitrary time, that is, the block 6 blocks before to the block 1 block before is the time when the frequency of use of the refrigerator 1 is small. That is, in the example of FIG. 7, the latest 6-hour total value from 1 block to 3 blocks is the minimum of 0 times, and the 6-hour total value immediately after the 3rd block is the maximum of 22 times. Therefore, it is determined that 6 hours from the 21st block, which is six blocks before, to the second block, which is one block before, from the third block, is a section time zone in which the refrigerator 1 is used less frequently. That is, the control unit 11 is one second unit time for which the immediately following total value of the maximum values is calculated when there are a plurality of minimum values of the latest total values and the maximum value of the immediately following total values is one. Based on the start time of the third block, it is determined that the interval between the start time of the third block and the start time of the third block is 6 hours before the opening and closing frequency of the storage chamber 12 is small.

In step S8, if there are a plurality of maximum 6-hour total values immediately after the block among the plurality of blocks having the minimum latest 6-hour total values, the control unit 11 determines each day. Among the blocks, the section time zone in which the frequency of use of the refrigerator 1 is low is determined, starting from the earliest unit time with the smallest number. In the example of FIG. 8, the unit time in which the latest 6-hour total value is the minimum value and the immediately-after 6-hour total value is the maximum value is the 6th block and the 18th block. In this case, the section time zone in which the frequency of use of the refrigerator 1 is low is determined starting from the sixth block with the smallest number in each day. That is, when there are a plurality of minimum values of the latest total value and a plurality of maximum values of the immediately following total value, the control unit 11 is the earliest immediately after the maximum value with the smallest number among the immediately following total values of the plurality of maximum values. Based on the start time of the sixth block, which is one third unit time for which the total time is calculated, the opening/closing frequency of the storage chamber 12 between 6 hours before the start time of the sixth block and the start time of the sixth block Is a small section.

As described above, FIG. 6 exemplifies a case where there is only one unit time in which the minimum value of the latest 6-hour total value is one. In FIG. 7, when there are multiple minimum values of the latest 6-hour total value and the maximum value of the next 6-hour total value is only one, the unit time is expected to have the highest occurrence probability. Is given as an example. FIG. 8 exemplifies a case in which there are a plurality of minimum values of the latest 6-hour total value and a plurality of unit times in which the maximum value of the immediate 6-hour total value is a plurality of points.

As mentioned above, the most recent use of the refrigerator 1 is the least used until that time, and the immediately following total value focuses on the time when the refrigerator 1 is used most to predict the boundary of the use frequency. Therefore, it is possible to accurately determine the time zone in which the frequency of use by the user is low. In addition, even if there is a difference in the activity time zone in one day depending on the household used, the frequency of use is predicted based on the amount of change in the number of times of use. Therefore, the living situation of the user can be inferred without any problem. Specifically, the user A wakes up at 7:00 am and starts using the refrigerator 1 and goes to bed at 22:00 pm, and the user B wakes up at 21:00 pm and starts using the refrigerator 1. It is assumed that the living situation is such that the user sleeps at 13:00. In this case, the frequency of use of the refrigerator 1 is determined by paying attention to the amount of change in the number of times the door is opened and closed, so that, for example, in the case of the user A, the time zone in which the frequency of use is low is from 24:00 pm to 6:00 a.m. For user B, it is determined that the time zone of low use frequency is from 2:00 pm to 8:00 pm.

In step S9, the control unit 11 performs temperature averaging control, which will be described later, as special control during the determined time of low usage frequency.

<Special temperature control>
FIG. 9 is an explanatory diagram showing special temperature control according to the first embodiment of the present invention. The special temperature control is an example of control performed in a living time zone other than the time zone in which the frequency of use is determined to be low. In other words, the special control is control in which the special temperature control is not started in a time zone of low usage frequency.

As shown in FIG. 9, first, the special temperature control uses a temperature control unit (not shown) that adjusts the temperature of each storage chamber 12 to a temperature higher than the normal temperature control such as −7° C. within a fixed time such as 100 minutes. The temperature is adjusted to the first set temperature such as high -3 degrees. Subsequently, in the special temperature control, the temperature is adjusted to a second set temperature such as -11 degrees which is lower than the normal temperature control such as -7 degrees within a fixed time such as 120 minutes. As described above, the special temperature control changes the temperature in the storage chamber 12 to two different temperatures over a plurality of unit times. By such special temperature control, the food is frozen after being supercooled.

The normal temperature, the first set temperature, and the second set temperature are in the freezing temperature zone of 0 degrees or less. The first set temperature is higher than a normal set temperature such as -7 degrees for soft freezing and is set between -5 degrees and 0 degrees, which is equal to or higher than the freezing start temperature of food, and is -3 degrees here. The second set temperature is set as a temperature lower than the normal temperature, and is set to -11 degrees here.

Note that the control execution time and the set temperature values described here are selected to be preferable values for accurately entering the supercooling control. However, it may be changed according to the cooling capacity of the refrigerator 1. Since the special temperature control is redone by opening and closing the door as a signal, the special temperature control can be started in accordance with the food input performed in conjunction with the opening and closing of the door.

When the refrigerator 1 starts operation, normal temperature control is performed. Further, when the door of the freezer compartment 123 of the storage compartment 12 is opened and closed during the life time zone, special temperature control is performed along with the opening and closing of the door of the freezer compartment 123 during the life hours other than the time zone determined to be less frequently used. Is carried out. After the special temperature control is completed, the normal temperature control is performed again.

FIG. 10 is a flowchart showing special temperature control according to the first embodiment of the present invention. As shown in FIG. 10, the special temperature control is started in a living time period other than the time period in which the usage frequency is determined to be low.

When the door of the freezer compartment 123 is opened/closed in the living time period other than the time period in which the use frequency is determined to be low in step S91, the control unit 11 differs from the normal temperature such as −7° C.-3 The temperature is cooled to the first set temperature such that the first set temperature such as degrees is maintained for a certain time such as 100 minutes.

The control unit 11 determines whether or not the door is opened/closed during cooling to the first set temperature in step S92. If the door has been opened or closed, the process returns to step S91, and the special temperature control is restarted from the beginning. The re-execution of the special temperature control will be described later. Further, when the process is redone, how much time has elapsed at the first set temperature is stored. If the door has not been opened or closed, the process proceeds to step S93.

The control unit 11 determines in step S93 whether or not a fixed time such as 100 minutes has elapsed. When the fixed time has elapsed, the process proceeds to step S94. If the fixed time has not elapsed, the process returns to step S92.

In step S94, the control unit 11 continuously maintains the second set temperature such as −11 degrees, which is different from the normal temperature such as −7 degrees, for a certain period of time such as 120 minutes continuously from the state of the first set temperature. Cool to the second set temperature.

The control unit 11 determines whether or not the door is opened/closed during cooling to the second set temperature in step S95. If the door has been opened or closed, the process returns to step S91, and the special temperature control is restarted from the beginning. Further, when the process is redone, how much time has elapsed at the first set temperature and the second set temperature is stored. If the door has not been opened or closed, the process proceeds to step S96.

The control unit 11 determines in step S96 whether a fixed time such as 120 minutes has elapsed. When the fixed time has elapsed, the process proceeds to step S97. If the fixed time has not elapsed, the process returns to step S95.

The control unit 11 determines in step S97 whether or not the special temperature control has to be redone. If there is a redo, the process proceeds to step S98. In step S98, temperature averaging control, which will be described later, is performed in the time zone when it is determined that the next usage frequency is low. When there is no redo, the special temperature control is ended and the normal temperature control is performed.

<Retry special temperature control>
FIG. 11 is an explanatory diagram showing the special temperature control of the redone according to the first embodiment of the present invention. As shown in FIG. 11, when the door opening/closing detector 13 detects the opening/closing of the door of the freezer compartment 123 during the special temperature control, the special temperature control is restarted from the beginning. The redo is extended for more than 6 hours when it is determined that the frequency of use is low.

That is, when the opening and closing of the door is performed again, for example, 50 minutes after the start of the special temperature control, the special temperature control is restarted from the beginning, and the inside of the storage chamber 12 is cooled again to the first set temperature and maintained for a certain period of time. After that, the second set temperature is maintained for a certain period of time.

<Temperature averaging control>
FIG. 12 is an explanatory diagram showing the temperature averaging control according to the first embodiment of the present invention. As shown in FIG. 12, when the special temperature control is performed once or more, the temperature in the freezing compartment 123, which is the storage compartment 12, is different from the normal temperature. Therefore, temperature averaging is performed to maintain the temperature in the freezing compartment 123, which is the storage compartment 12, in a temperature zone lower than the normal temperature so that the averaged temperature in the freezing compartment 123, which is the storage compartment 12, becomes the same as the normal temperature. Take control. The temperature averaging control is performed for 6 hours when it is determined that the frequency of use is low. The temperature averaging control is a special control.

The special temperature control is repeatedly performed by performing the special temperature control a plurality of times in the living time period other than the time period in which the use frequency is low, and the temperature in the freezing chamber 123, which is the storage chamber 12, is higher than the normal temperature. The first set temperature is maintained. In this case, calculate the average temperature of your daily life, and if the average temperature is higher than the normal temperature, make sure that the average temperature of the day is the same as the normal temperature. At, the temperature averaging control for cooling to the second set temperature lower than the normal temperature is performed. After the temperature averaging control is carried out, the set temperature is changed to the normal temperature when shifting to a period other than the time period in which the frequency of use is low. Thereby, even when the special temperature control is performed a plurality of times within a day, the temperature in the freezing compartment 123, which is the storage compartment 12, can be maintained at the same temperature as the normal temperature. Therefore, the storage period of the food due to the storage temperature can be stably maintained.

As shown in FIG. 12, special temperature control is performed multiple times during the life time, and temperature averaging control is performed during the next time when the usage frequency is low. When the special temperature control is repeatedly performed during the life time, the average temperature throughout the day becomes the normal temperature, so the temperature averaging control that operates at the second set temperature during the next time when the frequency of use is low. Is required.

<Calculation method of temperature averaging control>
If the door is opened/closed again during the period when the first preset temperature is selected in the section where the first preset temperature is selected in the living time zone and the special control is restarted from the beginning, the special temperature before the restart is performed. The extension time is defined as the elapsed time from the start of control to the start of special temperature control for re-execution. When the special temperature control is performed a plurality of times during the life time and the special temperature control is performed again a plurality of times, the extension time is added at any time.

　The extension time is reset at the timing of shifting from the living time zone to the less frequently used time zone, or at the timing of shifting from the less frequently used time zone to the living time zone.

Also, when the door is opened and closed again during the period when the second set temperature is selected and the special temperature control is restarted from the beginning, the second set temperature that was scheduled to be executed by the special temperature control before the restart is performed. The remaining time obtained by subtracting the time of the second set temperature actually performed from the temperature execution time is defined as the shortage time. When the special temperature control is performed a plurality of times in the life time zone and the special temperature control is performed again a plurality of times during the selection of the second set temperature, the shortage time is added at any time.

ㆍReset the shortage time at the timing of shifting from the living time zone to the less frequently used time zone, or at the timing of shifting from the less frequently used time zone to the living time zone.

Explain how to calculate the execution time of the temperature averaging control to be executed in the next time when the usage frequency is low from the extension time and the shortage time.

First, let A1 be the area obtained from the difference between the first set temperature and the reference temperature and the extension time. Next, the area obtained from the difference between the reference temperature and the second set temperature and the multiplication of the shortage time is defined as A2.

Further, in the next time period in which the frequency of use is low, the difference between the reference temperature and the second set temperature and the execution time X of the temperature averaging control, which is the time of the second set temperature, are set. Let B be the area obtained from the multiplication.

Establish the temperature averaging control execution time X so that A1, A2, and B obtained by these calculation methods are equal to the sum of A1 and A2 and B. The execution time X of the temperature averaging control in FIG. 12 is calculated according to the above calculation method. First, the difference between the first set temperature and the reference temperature is 4K due to the difference between -3 degrees and -7 degrees. The difference between the reference temperature and the second set temperature is 4K due to the difference between -7 degrees and -11 degrees. That is, A1, A2, and B can be determined only by the operating time in this example. According to this, A1 is 50 minutes, which is 50, and A2 is two 115 minutes, which is 230, and B is 50+230=280. Thereby, according to the above calculation method, the execution time X of the temperature averaging control is 280 minutes, which is 4 hours and 40 minutes.

In the first embodiment, the purpose of determining 6 hours with a low frequency of use is to enable the temperature averaging control in the special temperature control. In the first embodiment, the control for performing cooling at a temperature lower than the normal temperature, which is the second set temperature by the temperature averaging control, is 4 hours and 40 minutes with respect to 6 hours, which is less frequently used. This is an example with a small margin. However, if the user does not like the state of being cooled by the second set temperature, which is the state where the temperature inside the storage chamber 12 is low when the time period of low usage ends, for example, the calculation result exceeds 4 hours. In such a case, a restriction may be set so that the temperature averaging control is performed for 4 hours. In addition, if it is assumed that cooling requires, for example, 8 hours in terms of control specifications, then 6 hours with a low frequency of use is discriminated from 8 hours with a low frequency of use in the first embodiment. Is also good.

<Effect of Embodiment 1>
According to the first embodiment, the refrigerator 1 includes a storage chamber 12 that has an openable/closable door and cools and stores food such as stored products. The refrigerator 1 includes a door opening/closing detection unit 13 that detects opening/closing of the door of the storage room 12. The refrigerator 1 includes a storage unit 111 that stores the number of times of opening and closing the door detected by the door opening/closing detection unit 13 for each arbitrary unit time and for an arbitrary number of days. The refrigerator 1 includes a control unit 11. The control unit 11 calculates an average value between arbitrary days, which is the average of the number of times of opening and closing the door in each unit time during an arbitrary number of days, from the number of times of opening and closing the door for each arbitrary unit time stored in the storage unit 111. .. The control unit 11 calculates the latest total value obtained by summing up the number of times of opening and closing the door for each unit time up to the set time, starting from each unit time in the average value over the arbitrary days. The control unit 11 calculates the total value immediately after summing the number of times of opening and closing the door for each unit time up to the set time, starting from each unit time in the average value between arbitrary days. The control unit 11 determines a section having a small opening/closing frequency of the storage chamber 12 divided by the set time based on one or both of the latest total value and the immediately following total value.

According to this configuration, the average value for any number of days is updated every 24 hours, and the number of times of opening and closing the door in each section time can be grasped in a form following the change in the living condition of the user, and the frequency of use by the user is small. Any time zone can be predicted according to the living situation of the user. Further, the time period in which the frequency of use is small is predicted by paying attention to the amount of change in the number of times of opening and closing the door, not the absolute value of the number of times of opening and closing the door. Thereby, even if the absolute value of the number of times of opening and closing the door of the refrigerator 1 differs depending on the household, and the living situation of the user differs from that of general life, it is possible to accurately predict an arbitrary time with a low frequency of use.

Also, with this configuration, it is possible to set a group of section times that are less frequently used. Then, when it is desired to perform control over a plurality of hours, the control is not interrupted midway.

Also, according to this configuration, for example, the threshold value that the frequency of use is high when the number of door openings is 10 or more is not set. Therefore, in the case of a user who opens the door about 5 times at most per unit time, it is not always determined that the frequency of use is low throughout the day. Furthermore, when the usage frequency changes every unit time, the operating state does not change momentarily, and the energy consumption performance does not deteriorate.

Also, according to this configuration, it is possible to find a time period when the refrigerator 1 is not used for a plurality of hours. Then, it is possible to reduce the case where the temperature averaging control or the special control such as the defrosting operation which is performed during the time period when the refrigerator 1 is not used cannot be performed throughout the day.

According to the first embodiment, when the minimum value of the latest total values is one, the control unit 11 uses the start time of one first unit time for calculating the latest total value of the minimum values as a reference, and It is determined that the interval between the set time before the start time of one unit time and the start time of the first unit time is the interval in which the opening/closing frequency of the storage chamber 12 is small.

According to this configuration, the average value for any number of days is updated every 24 hours, and the number of times of opening and closing the door in each section time can be grasped in accordance with the change in the living condition of the user, and the latest total value can be obtained for each section time. Calculate the minimum value of. Then, it can be understood that the frequency of use of the refrigerator 1 is low until the first unit time, which is one minimum interval time. Accordingly, it is possible to accurately grasp the boundary of the frequency of use in which the user does not use the refrigerator 1 most by the first unit time and uses the refrigerator 1 most by the first unit time or later. Therefore, for example, even if the door opening/closing is detected in the midnight when the frequency of use is generally low, it is still determined that the time of use is low in terms of control. Therefore, when the temperature averaging control for a plurality of unit times desired to be performed at midnight is set, the temperature averaging control can be performed in the time zone determined to be less frequently used.

According to the first embodiment, when there are a plurality of minimum values of the latest sum and the maximum value of the immediately following sum is one, the controller 11 calculates one immediately after the maximum. Based on the start time of the second unit time, it is determined that the interval between the set time before the start time of the second unit time and the start time of the second unit time is the interval in which the opening/closing frequency of the storage chamber 12 is small.

According to this configuration, the immediately following total value is calculated in addition to the most recent total value, and when there are multiple minimum values of the most recent total values and the maximum value of the immediately following total values is one, the immediately following total value of the maximum values is calculated. From the start time of the second unit time when the value is calculated, it can be understood that a time zone between the set time and the start time of the second unit time is the usage frequency is low. Accordingly, it is possible to accurately grasp the boundary of the frequency of use in which the user does not use the refrigerator 1 most by the second unit time and uses the refrigerator 1 most by the second unit time or later. Therefore, for example, even if the door opening/closing is detected in the midnight when the frequency of use is generally low, it is still determined that the time of use is low in terms of control. Therefore, when the temperature averaging control for a plurality of unit times desired to be performed at midnight is set, the temperature averaging control can be performed in the time zone determined to be less frequently used.

According to the first embodiment, when there are a plurality of latest minimum sum values and a plurality of immediately following sum values, the control unit 11 determines the earliest maximum value among the plurality of immediately following sum values. The opening and closing frequency of the storage chamber 12 between the start time of the third unit time and the start time of the third unit time, based on the start time of one third unit time for which the total time immediately after the value is calculated is used as a reference. Is a small section.

According to this configuration, in addition to the latest total value, the immediately following total value is calculated, and when there are a plurality of latest minimum total values and there are a plurality of immediately following total values, the immediately following total of the plurality of maximum values is calculated. From the start time of the third unit time when the total value immediately after the maximum value having the smallest number among the values is calculated, it can be understood as a time zone in which the frequency of use is low between the set time before and the start time of the third unit time. Accordingly, it is possible to accurately grasp the boundary of the frequency of use, in which the user does not use the refrigerator 1 most by the third unit time and uses the refrigerator 1 most by the third unit time or later. Therefore, for example, even if the door opening/closing is detected in the middle of the night when the frequency of use is generally low, it is still determined that the time of use is low in terms of control. For this reason, when the temperature averaging control for a plurality of unit times desired to be performed at midnight is set, the temperature averaging control can be performed in the time zone determined to be less frequently used.

According to the first embodiment, the control unit 11 performs special control such as temperature averaging control that continues for a plurality of unit times in a time period when it is determined that the opening/closing frequency of the storage chamber 12 is low.

According to this configuration, even if the door opening/closing is detected, for example, in the middle of the night when the frequency of use is generally low, it is still determined that the time of use is low in terms of control. For this reason, when special controls such as temperature averaging control over multiple unit times desired to be performed at midnight are set, if the special control is not interrupted by the opening and closing of the door at midnight and is not used frequently, Special control can be implemented during the determined time period.

According to the first embodiment, the control unit 11 maintains the temperature in the storage chamber 12 at the first set temperature different from the normal temperature for a certain period of time, and then keeps the temperature at the second set temperature different from the first set temperature. Perform special temperature control to maintain time. In the special control, the special temperature control is not started in a section where the opening/closing frequency of the storage chamber 12 is small.

According to this configuration, when the special temperature control other than the special control over a plurality of unit times is set, the special temperature control can be performed in a time period other than the time period when it is determined that the usage frequency is low.

According to the first embodiment, when the door is opened or closed during the special temperature control, the control unit 11 restarts the special temperature control from the beginning.

Special temperature control must be performed continuously to optimally cool stored foods. According to this configuration, when the door is opened and closed during the special temperature control, the special temperature control is restarted from the beginning. As a result, the stored food or the like can be optimally cooled with good quality.

According to the first embodiment, when the control unit 11 performs the special temperature control again from the beginning, the control unit 11 operates at the second set temperature in the section in which the opening/closing frequency of the storage chamber 12 is small next time and throughout the day. The temperature averaging control for adjusting the temperature in the storage chamber 12 to the normal temperature is performed. The special control is temperature averaging control.

According to this configuration, when the temperature averaging control, which is a special control that extends over a plurality of unit times, is set, the temperature averaging control can be performed in a time zone determined to be infrequently used. The temperature averaging control is performed when the special temperature control is performed again from the beginning to cause a difference between the current temperature in the storage chamber 12 and the normal temperature in the storage chamber 12. As a result, the temperature inside the storage chamber 12 is averaged to the normal temperature by the temperature averaging control, and the inside of the storage chamber 12 can be maintained at the optimum temperature for cooling the stored food or the like.

According to the first embodiment, the control unit 11 determines that a section other than the section in which the storage room 12 is opened and closed less frequently is the living time zone, and performs the special temperature control in the living time zone.

Special temperature control needs to be carried out immediately and continuously after opening and closing the door of the storage room 12 in order to optimally cool the stored foods. According to this configuration, the special temperature control is performed during the living time period when the door of the storage room 12 is opened and closed. As a result, the stored food or the like can be optimally cooled with good quality.

According to the first embodiment, the control unit 11 re-executes the special temperature control from the beginning by extending it from the living time period to the section where the opening/closing frequency of the storage chamber 12 is small.

According to this configuration, when the special temperature control cannot be performed during the life time, the special temperature control is extended to the time period when it is determined that the usage frequency is low thereafter. Thereby, the special temperature control is performed before the stored food or the like is damaged by long-term storage, and the stored food or the like can be optimally cooled with good quality.

Embodiment 2.
In the second embodiment, the defrosting operation is performed as a special control at an arbitrary time determined in the first embodiment and having a low use frequency.

By starting defrosting in the section where it is determined that the frequency of use by the user is low, the defrosting operation can be performed while suppressing the temperature rise in the storage chamber 12. In the first embodiment, in consideration of the possibility that the temperature averaging control time may reach 6 hours, the values of the latest 6-hour total value and the immediately-after 6-hour total value of the 7-day average value are calculated to reduce the frequency of use 6 I was determining the time. However, when considering the defrosting operation of the second embodiment and the control time before and after the defrosting operation, about 3 hours are required. For this reason, in the second embodiment, the latest three-hour total value and the immediately-following three-hour total value of the seven-day average value are calculated, and the three-hour usage frequency is determined.

In addition, in the first and second embodiments, it is desirable that all the arbitrary times of the immediate total value, the latest total value, and the arbitrary time with low usage frequency be set to the same value. However, the respective arbitrary times may be set to different values. As the conventional defrosting timing, there is a start by the operating time of the compressor or the refrigerator 1, or a start by a detection value of a temperature detecting means for detecting the temperature of the cooler 14.

However, there is a possibility that the start of defrosting may be determined during the daytime when users frequently use it. In that case, there is a problem that the temperature in the storage chamber 12 rises too much.

Besides, by performing the defrosting operation during the time when the user does not open and close the door, the temperature rise in the storage chamber 12 is suppressed. However, if the configuration is performed when there is no opening/closing of the door, there may be a case where the timing when defrosting is necessary and the section where the number of times the door is opened/closed that fluctuates depending on the user do not match. It is possible that driving may not be possible.

On the other hand, also in the second embodiment, the method of determining the time zone of low use frequency determined in the first embodiment is used. As a result, it is possible to extract a section with a certain degree of coherence and a small frequency of use, and even if door opening/closing is detected during that section, it is possible to suppress the risk of causing an excessive rise in the temperature in the storage chamber 12, and to perform the defrosting operation. Can be implemented.

<Effect of Embodiment 2>
According to the second embodiment, the refrigerator 1 includes the defrost heater 15 that defrosts the cooler 14. The special control is a defrosting operation in which the defrosting heater 15 defrosts the cooler 14.

According to this configuration, by predicting a time zone in which the frequency of use is low, it is possible to extract a section with a certain degree of coherence and a low frequency of use, and even if door opening/closing is detected in the low frequency of use, storage is performed. An excessive temperature rise in the chamber 12 is suppressed, and the defrosting operation can be performed.

Embodiment 3.
In the third embodiment, the time zones of morning, daytime, night, and midnight are set from an arbitrary time of low use frequency determined in the first embodiment, and the operation is controlled according to each.

In the third embodiment, the arbitrary time with low usage frequency is set to 6 hours. This 6 hours with a low frequency of use is defined as midnight, and during this period, it is determined that the frequency of use of the refrigerator 1 by the user is low, and it is generally a time period when the user is sleeping. 6 hours from the end of midnight are defined as morning, 6 hours from the end of morning are defined as daytime, and 6 hours from the end of day to the start of midnight are defined as night. 6 hours is set because the possibility of becoming a 6-hour segment obtained by dividing one day into four is considered as a general lifestyle pattern.

Specifically, an example is described in which one day is divided into 24 blocks from 0 block to 23 blocks on an hourly basis. In the first embodiment, when it is determined that 6 hours from 18 blocks to 23 blocks is a section with a low use frequency, this section is set to midnight.

▽It is expected that the section with the least frequency of use will be bedtime, regardless of the user. Therefore, it is assumed that it is midnight, then 0 blocks from the end of midnight to 5 blocks 6 hours later are in the morning, 6 blocks from the end of the morning to 11 blocks 6 hours later are noon, and so on. 12 to 17 blocks are defined as night.

By defining one day as morning, noon, night, and midnight in this way, for example, in the case of the refrigerator 1 in which the frequency of use of frozen food for lunch is increased in the morning, that is, the frequency of opening and closing the freezer compartment 124 tends to increase. In anticipation that the temperature in the storage room 12 will rise in the morning, the refrigerator 1 is operated with the cooling capacity improved from midnight.

If the opening/closing of the freezer compartment 124 is not actually detected in the morning, this detection result may be taken into consideration to determine whether or not to implement the operation for improving the cooling capacity at the next midnight.

Similarly, it is possible to prepare a water bottle in the morning and use a lot of ice-made ice. Therefore, the refrigerator 1 is operated so that the ice making is performed at the midnight timing and the ice making is completed at the morning timing.

In addition, it is expected that the number of beverages taken out will increase in the daytime hours when the temperature is the highest in the day, and the cooling performance of the refrigerating room 121 is increased one hour before the optional end time in the morning so that the refrigerator can be used. 1 is driven. As a result of the operation, when the opening/closing of the ice making chamber 122 is not actually detected at noon, the detection result is taken into consideration to determine whether or not to implement the morning cooling operation in preparation for the next ice making. good.

In addition, assuming that a user who goes out shopping at noon opens and closes each storage room 12 of the refrigerator 1 after returning from the shopping, the cooling capacity is improved so that the temperature shifts in a temperature zone lower than a preset temperature in advance. The refrigerator 1 may be operated. At the end of the daytime, if the temperature change throughout the daytime is lower than the set temperature by 1°C, which is an arbitrary frequency, even if you decide whether to learn whether to improve the cooling capacity assuming the next daytime shopping good.

Also, in the latter half of the night, preparation of meals and cleaning up are completed, and it is determined that the time for entertainment and the time for preparation before rest are entered, and the cooling capacity of each storage room 12 is lowered and the refrigerator 1 is operated. good. Thereby, the energy saving performance can be improved. In the meantime, when any one of the five times of opening/closing of the door of the storage room 12 is detected per hour, which is an arbitrary number of times, it may be determined by learning whether or not the operation of lowering the cooling capacity is performed in the latter half of the night.

In the third embodiment, the section is defined as morning, daytime, night, and midnight, but it may be divided into a plurality of time zones such as A, B, C, and D in general.

In the above-described Embodiment 3, the time of low use frequency is defined as midnight, and the time zone is defined as morning, daytime, and night, which are set as basic pillars in living condition prediction. Therefore, the refrigerator 1 can be optimally operated for each time zone based on the content predicted in advance.

Next, we will explain the control that can determine whether special temperature control should be performed or not according to the lifestyle pattern of the day, even if the doors are opened and closed at times other than the standard lifestyle pattern such as holidays.

In the storage unit 111, when the special temperature control is performed, the history is a time zone in which one day is divided into four every 6 hours defined above, that is, morning, daytime, night, midnight, or general time. It is saved in each time zone such as A, B, C, and D. If special temperature control is performed at least once each in the morning, daytime, and night among these four time zones, it is determined that there is activity in three time zones from morning to night, and the midnight time zone It is determined that the door is unlikely to be opened/closed during the time of low use frequency, and that the special temperature control is not performed even if the door is opened/closed during the midnight time.

On the other hand, if the special temperature control is not performed at least during one of the morning, daytime, and evening hours, there is no activity during at least one of the morning and evening hours on that day, which is normally the case. It is judged that there is a possibility that the door may be opened and closed even in the midnight hours when it is judged that the usage frequency is low. Then, when the opening/closing of the door is actually detected during the midnight time, the special temperature control is executed.

Based on the result of usage frequency prediction and special temperature control execution history, the special temperature control execution timing is automatically determined and implemented even when the life pattern is different from normal. As a result, it is possible to provide optimum temperature control at an appropriate timing without the need for manual operation by the user.

<Effect of Embodiment 3>
According to the third embodiment, the special control is a normal operation and an operation in which the cooling capacity is changed.

According to this configuration, the refrigerator 1 can be operated by changing the cooling capacity during normal use and the cooling capacity during the time of low usage, and the stored foods can be optimally stored in the storage room 12 with good quality.

According to the third embodiment, the control unit 11 defines a section in which the opening and closing frequency of the storage room 12 is small as 6 hours at midnight, and determines morning, noon, and night in order every 6 hours from the end of midnight. The control unit 11 performs control with a predetermined cooling capacity in accordance with the respective time zones of midnight, morning, daytime, and night.

According to this configuration, a time zone with a low frequency of use is defined as midnight, and the time zone after midnight is defined as the starting point, and the subsequent time zones are defined as morning, noon, and night. Thereby, the living situation prediction of the user can be basically divided, and the refrigerator 1 can be optimally operated with the content predicted in advance for each time zone such as midnight, morning, day, and night.

Note that the first to third embodiments of the present invention may be combined or applied to other parts.

1 refrigerator, 11 control section, 12 storage room, 13 door opening/closing detection section, 14 cooler, 15 defrost heater, 111 storage section, 121 refrigerating room, 122 ice making room, 123 freezing room, 124 freezing room, 125 vegetable room, 131 door switch, 132 door switch, 133 door switch.

Claims

A storage room that has a door that can be opened and closed and cools and stores stored items,
A door opening/closing detection unit that detects opening/closing of the door of the storage room,
A storage unit that stores the number of times the door is opened and closed detected by the door open/close detection unit for an arbitrary number of days for each arbitrary unit time,
A control unit,
Equipped with
The control unit is
From the number of times of opening and closing the door for each arbitrary unit time stored in the storage unit, calculate an average value for any number of days, which is an average of the number of times of opening and closing the door in each unit time during the arbitrary number of days,
Calculate the latest total sum of the number of times of opening and closing the door for each unit time up to a set time starting from each unit time in the average value between the arbitrary days,
Calculate the total value immediately after summing the number of times of opening and closing the door for each unit time up to a set time starting from each unit time in the average value between the arbitrary days,
A refrigerator that determines a section having a small opening/closing frequency of the storage compartment divided into set times, based on one or both of the latest total value and the immediately following total value.
The control unit is
When the minimum value of the latest total value is one, the start time of one first unit time when the latest total value of the minimum value is calculated is used as a reference, and the set time is before the start time of the first unit time. The refrigerator according to claim 1, wherein the interval between the start time of the first unit time and the start time of the first unit time is determined as a section in which the opening/closing frequency of the storage chamber is low.
The control unit is
When there are a plurality of minimum values of the latest total value and the maximum value of the immediately following total value is one, the start time of one second unit time for calculating the immediately following total value of the maximum values is used as a reference. The refrigerator according to claim 1 or 2, wherein a period between a set time before the start time of the second unit time and a start time of the second unit time is determined as a section in which the opening/closing frequency of the storage chamber is small.
The control unit is
When there are a plurality of minimum values of the latest total value and a plurality of maximum values of the immediately following total value, the immediately following total value of the earliest maximum value among the plurality of immediately following total values is calculated 1 Based on the start time of one third unit time, it is determined that the interval between the set time before the start time of the third unit time and the start time of the third unit time is a section in which the opening/closing frequency of the storage chamber is small. The refrigerator according to any one of claims 1 to 3.
The refrigerator according to any one of claims 1 to 4, wherein the control unit performs a special control that continues for a plurality of unit times during a time period when it is determined that the opening/closing frequency of the storage room is low.
The control unit performs a special temperature control in which the temperature in the storage chamber is maintained at a first preset temperature different from the normal temperature for a certain period of time, and then at a second preset temperature different from the first preset temperature for a certain period of time. Then
The refrigerator according to claim 5, wherein the special control does not start the special temperature control in a section in which the opening/closing frequency of the storage chamber is small.
The refrigerator according to claim 6, wherein the control unit restarts the special temperature control from the beginning when the door is opened and closed during the special temperature control.
When the control unit performs the special temperature control again from the beginning, the temperature of the storage chamber throughout the day is increased by operating at the second set temperature in a section where the opening/closing frequency of the storage chamber is small next time. Perform temperature averaging control to adjust to normal temperature,
The refrigerator according to claim 7, wherein the special control is the temperature averaging control.
9. The control unit determines that a section other than a section in which the opening/closing frequency of the storage chamber is small is a living time zone, and performs the special temperature control in the living time zone. refrigerator.
10. The refrigerator according to claim 9, wherein the control unit extends the special temperature control from the beginning to a section in which the opening and closing frequency of the storage chamber is small from the living time period.
Equipped with a defrost heater that defrosts the cooler,
The refrigerator according to claim 5, wherein the special control is a defrosting operation for performing defrosting of the cooler by the defrosting heater.
The refrigerator according to claim 5, wherein the special control is an operation in which the cooling capacity is changed from that in normal operation.
The control unit is
The section in which the opening and closing frequency of the storage room is small is defined as 6 hours at midnight, and it is determined to be morning, noon, and night in order every 6 hours from the end of midnight.
The refrigerator according to any one of claims 1 to 12, wherein the refrigerator is controlled with a predetermined cooling capacity in accordance with each time zone of midnight, morning, daytime, and night.