JP3579169B2 - Refrigerator control device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a control device for a refrigerator.
[0002]
[Prior art]
For example, in the conventional refrigerator control disclosed in Japanese Patent Application Laid-Open No. Hei 5-26564, when the operation time of the compressor reaches a set time, one day is divided into a plurality of time zones. Compressor average operation time data is added in order from the data of the current time zone, and the calculation is performed until the value reaches the maximum operation time of the compressor. Choose and defrost during that time.
[0003]
[Problems to be solved by the invention]
Since the conventional refrigerator control is performed as described above, a time zone with the lowest frequency of use is selected within a range selected as a defrostable time zone. However, when the range of selecting the door opening / closing ratio is a daytime period as a result of adding the compressor operation ratio, defrosting is performed during the daytime in order to select a time period in which the door opening / closing ratio is the smallest. Therefore, there has been a problem that the defrosting when the refrigerator is frequently used during the daytime affects the temperature of the stored food.
[0004]
In addition, since the operation rate of the compressor after defrosting during the daytime becomes higher than after defrosting at nighttime, there is a problem that the power consumption is affected.
[0005]
The present invention has been made in order to solve the above-described problems, and an object of the present invention is to provide a control device for a refrigerator capable of performing defrosting control without affecting the food temperature and power consumption in a refrigerator.
[0006]
[Means for Solving the Problems]
The refrigerator control device according to claim 1, wherein the cool air generated by the cooler of the refrigeration cycle using the compressor is forcibly circulated by a fan, and in the refrigerator having the door, the operation time of the compressor is integrated. Means for determining the average number of times of opening and closing of the door for each time period of the day, means for updating the average number of times of opening and closing of the door for each time period of the day in accordance with the usage, and setting of the operating time of the compressor. When the time is reached, means to compare the average number of times the door is opened and closed for each time period, and if there are multiple time periods with the smallest number of times the door is opened and closed, the time period farthest from the present time is defrosted Means for selecting as
[0007]
The control device for a refrigerator according to claim 2, wherein the cool air generated by the cooler of the refrigerating cycle using the compressor is forcibly circulated by a fan, and the operation time of the compressor is provided in the refrigerator having a door and an outside air temperature detecting means. Means for calculating the average number of times of opening and closing of the door for each time period of the day, means for updating the average number of times of opening and closing of the door for each time period of the day in accordance with the use condition, Means for calculating the average outside air temperature per unit time from the outside air temperature detected by the detection means, and means for comparing the average number of times the door is opened and closed for each time zone when the operating time of the compressor reaches the set time. Means for selecting a time zone having the lowest average outside air temperature as a defrosting time zone when there are a plurality of time zones in which the average number of times of opening and closing of the door is the smallest.
[0008]
The control device for a refrigerator according to claim 3 divides a day into time zones of a predetermined time, and has a door opening / closing frequency of the day for each time zone and a door average opening / closing frequency of a plurality of days for each block. The average number of door opening / closing for a plurality of days is updated for each block from the number of door opening / closing for the day, and this is used as the average number of door opening / closing for each time period of the day.
[0009]
The control device for a refrigerator according to claim 4 is characterized in that the defrosting time zone is selected at a point in time when eight hours have elapsed since the power-on or the end of the previous defrosting operation.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment 1 FIG.
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall configuration diagram of a refrigerator control device according to Embodiment 1 of the present invention. In the figure, 1 is a compressor for compressing and circulating a refrigerant, 2 is a cooler for evaporating the refrigerant, 3 is a fan for circulating cool air cooled by the cooler 2, and 4 is a door detector for detecting opening and closing of a door Reference numeral 5 denotes an outside air thermistor for detecting the ambient temperature of the refrigerator, 6 denotes a control board for controlling the entire refrigerator, 7 denotes control means, and 8 denotes control method determination means.
[0011]
2 to 6 are flowcharts of the control device of the refrigerator according to the first embodiment of the present invention. The operation up to the start of defrosting according to the first embodiment will be described with reference to FIGS.
Step 20 in FIG. 3 is a process for counting the operating time of the compressor, and the value is used when determining the cumulative operating time of the compressor in step 10 in FIG.
[0012]
FIG. 4 shows a process of dividing the day into 12 blocks (time zones), counting the number of times the door is opened and closed for each time zone, and calculating the average number of times. In step 30, the number of times of opening and closing the door is counted, and in step 31, the average number of times of opening and closing of the door is calculated. The method of obtaining the average number of times of opening and closing of the door is based on the number of times of opening and closing the door for each time period. Do. In addition, by using the following calculation method, it is possible to gradually update the average door opening / closing data for eight days in each time zone according to the use condition of the refrigerator.
Average number of open / closed doors for 8 days = [(average number of open / closed doors for 8 days) − {(average number of open / closed doors for 8 days) × 1/8)} + (number of open / closed doors per day)
[0013]
FIG. 5 compares the average door opening / closing data for eight days for each time zone obtained by the processing of FIG. 4 (step 40), and selects a time zone where the average door opening / closing number for the eight days is the least (step 41). . If there are a plurality of time zones having the smallest average door opening / closing frequency, a time zone farthest from the present time is selected (step 42). Then, the time zone selected in step 41 or step 42 is selected as the time zone for defrosting (step 43).
[0014]
FIG. 2 shows a flow up to the start of defrosting. In step 10, the operation continues to wait until the cumulative operation time of the compressor reaches 8 hours. If eight hours have elapsed, a time for performing the defrosting by the processing of FIG. 5 is selected in step 11. After that, in step 12, waiting for the time zone selected in step 11 to come, and when the time zone has come, defrosting is started (step 13).
[0015]
According to this embodiment, the defrosting is performed by always selecting a time period in which the number of times of opening and closing the door is the least in a day without being affected by the operation rate of the compressor as in the related art. Does not affect That is, conventionally, the range in which the time period for starting defrosting is selected is influenced by the operation ratio of the compressor, but by ignoring the operation ratio of the compressor, a time period in which the operation ratio of the compressor is high is selected. This is because the possibility has disappeared. If there are a plurality of time zones having the least average door opening / closing count data, the time zone farthest from the present time is selected. Defrosting can be performed every hour.
[0016]
Embodiment 2 FIG.
Hereinafter, a second embodiment of the present invention will be described with reference to the drawings. 6 and 7 are flowcharts of a control device for a refrigerator according to Embodiment 2 of the present invention.
The operation of the second embodiment up to the start of defrosting is basically the same as that of the first embodiment until a time period in which the average number of times of opening and closing the door is minimum is selected.
[0017]
FIG. 7 shows a process for selecting a time zone in which defrosting is to be performed, similarly to the process of FIG. However, if there are a plurality of time zones in which the average door opening / closing frequency is the minimum, the time zone in which the average outside air temperature is lower is selected and defrosting is performed (step 62).
[0018]
FIG. 6 shows a process for obtaining the average outside air temperature. The maximum temperature and the minimum temperature in each time zone are detected (step 50), and the calculation result is set as an average temperature (step 51).
Average temperature = {(highest temperature) + (lowest temperature)} 2
[0019]
The control device of the refrigerator according to the second embodiment further considers the outside air temperature condition. Therefore, in the night type home, the method of the first embodiment may perform defrosting during the daytime when the outside air temperature is high. However, if there is a time zone with the same number of door opening and closing times during the day and night, the night time zone where the outside air temperature is low is selected, so that the influence on the food temperature in the refrigerator and power consumption is further reduced.
[0020]
【The invention's effect】
The refrigerator control device according to claim 1, wherein the cool air generated by the cooler of the refrigeration cycle using the compressor is forcibly circulated by a fan, and in the refrigerator having the door, the operation time of the compressor is integrated. Means for determining the average number of times of opening and closing of the door for each time period of the day, means for updating the average number of times of opening and closing of the door for each time period of the day in accordance with the usage, and setting of the operating time of the compressor. When the time is reached, means to compare the average number of times the door is opened and closed for each time period, and if there are multiple time periods with the smallest number of times the door is opened and closed, the time period farthest from the present time is defrosted The defrosting interval does not become extremely short, and defrosting can be performed almost every 24 hours every day.
[0021]
The control device for a refrigerator according to claim 2, wherein the cool air generated by the cooler of the refrigerating cycle using the compressor is forcibly circulated by a fan, and the operation time of the compressor is provided in the refrigerator having a door and an outside air temperature detecting means. Means for calculating the average number of times of opening and closing of the door for each time period of the day, means for updating the average number of times of opening and closing of the door for each time period of the day in accordance with the use condition, Means for calculating the average outside air temperature per unit time from the outside air temperature detected by the detection means, and means for comparing the average number of times the door is opened and closed for each time zone when the operating time of the compressor reaches the set time. Means for selecting a time zone having the lowest average outside air temperature as a defrosting time zone when there are a plurality of time zones having the smallest average number of times of opening and closing of the door. Defrost Because, food temperature, impact on the power consumption is small.
[0022]
The refrigerator control device according to the third aspect performs defrosting by selecting a time zone in which the number of times of opening and closing the door is the least in a day, and thus has an effect of not affecting the food temperature and power consumption in the refrigerator.
[0023]
The control device for a refrigerator according to claim 4 has an effect that the cooling efficiency is not impaired because the defrosting interval is maintained for 8 hours or more.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a refrigerator control device according to Embodiment 1 of the present invention.
FIG. 2 is a flowchart of the control device of the refrigerator according to the first embodiment of the present invention.
FIG. 3 is a flowchart of a control device of the refrigerator according to the first embodiment of the present invention.
FIG. 4 is a flowchart of the control device of the refrigerator according to the first embodiment of the present invention.
FIG. 5 is a flowchart of the control device of the refrigerator according to the first embodiment of the present invention.
FIG. 6 is a flowchart of a control device for a refrigerator according to Embodiment 2 of the present invention.
FIG. 7 is a flowchart of the control device of the refrigerator according to the second embodiment of the present invention.
[Explanation of symbols]
1 compressor, 2 cooler, 3 fan, 4 door detector, 5 outside air thermistor, 6 control board, 7 control means.

Claims (4)

Forcibly circulating the cool air generated by the cooler of the refrigeration cycle using the compressor with a fan, and in a refrigerator having a door, a means for integrating the operation time of the compressor, and for each time zone of the day. Means for determining the average number of times of opening and closing of the door, means for updating the average number of times of opening and closing of the door for each time period of this day in accordance with the use situation, and when the operating time of the compressor reaches a set time. Means for comparing the average number of times of opening and closing of the door for each time zone, and means for selecting the time zone furthest from the present time as the defrosting time zone when there are a plurality of time zones with the minimum number of times of opening and closing of the door. And a control device for a refrigerator. Means for forcibly circulating cool air generated by a cooler of a refrigeration cycle using a compressor with a fan, and integrating the operating time of the compressor in a refrigerator having a door and an outside air temperature detecting means; Means for determining the average number of times of opening and closing of the door for each time period, means for updating the average number of times of opening and closing of the door for each time period of this day in accordance with usage conditions, and the outside air detected by the outside air temperature detecting means. Means for calculating the average outside air temperature per unit time from the temperature, means for comparing the average number of times the door is opened and closed for each time zone when the operating time of the compressor has reached a set time, and Means for selecting a time zone having the lowest average outside air temperature as a defrosting time zone when there are a plurality of time zones having the smallest average number of times of opening and closing. The day is divided into time zones of a predetermined time, and the number of door opening / closing of the day for each time zone, and the average number of door opening / closing for a plurality of days for each block, and when one day elapses, the number of door opening / closing for the day is divided into a plurality of 3. The refrigerator control device according to claim 1, wherein the average number of times of opening and closing of the door is updated for each block, and the updated average number of times of opening and closing is used as the average number of times of opening and closing of the door for each time period of the day. The refrigerator control device according to claim 1 or 2, wherein the timing of selecting the defrosting time zone is performed at a point of time when a compressor operation integrated time has elapsed 8 hours after power-on or a previous end of the defrosting.

Images