JPH1144480A - Temperature control device for refrigerator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control a target temperature appropriately in a temperature control device for a refrigerator. SOLUTION: The temperature in a storage room 12 is detected by a controlled temperature sensor 18, and then stored in a memory as the temperature data in order at predetermined intervals. When the storage zone of this memory becomes full, the stored temperature data are updated into new detected temperatures of the controlled temperature sensor 18 in order from the old data. Whenever new temperature data is stored in the memory, the highest and lowest temperatures are chosen from all the temperature data that are stored in this memory to be indicated by an indicator. At this time, when a door switch 16 detects that a door 15 is in an open condition, the detected temperature of the controlled temperature sensor 18 is prohibited from being stored in the memory.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to a refrigerator for storing foods in a low-temperature state, and manages the temperature in the storage room of the refrigerator or the core temperature of the foods stored in the storage room. About.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Utility Model No. 1-41109.
As disclosed in Japanese Patent Application Laid-Open Publication No. H10-209, temperature detection means for detecting a temperature to be managed is provided, and temperature data representing the temperature detected by the temperature detection means is obtained at predetermined time intervals for a predetermined number of times in the past. The stored temperature is stored in the storage means, and the temperature represented by the past predetermined time of the temperature data stored and stored in the storage means is respectively displayed on the display, and the past of the temperature to be managed is displayed. A temperature management device for a refrigerator that displays a history over a predetermined time is known.

Further, as disclosed in Japanese Patent Application Laid-Open No. 61-50026, for example, a temperature detecting means for detecting a temperature to be managed is provided, and a start instruction means instructs the start of monitoring of the temperature to be managed. While storing the temperature data representing the temperature detected by the temperature detection means as the temperature data representing the maximum temperature in the storage means,
Thereafter, when the temperature detected by the temperature detection means is higher than the maximum temperature represented by the temperature data stored in the storage means, the temperature data representing the maximum temperature stored in the storage means represents the detected temperature. After updating to the temperature data, the maximum temperature represented by the temperature data stored in the storage means is displayed on the display at any time, and the start instruction by the start instruction means of the temperature to be managed is performed. There has also been a temperature control device for refrigerators that displays the history since then by displaying the highest temperature.

[0004]

However, in the above-mentioned conventional apparatus, when trying to control the temperature in the storage room of the refrigerator or the core temperature of the food material stored in the storage room, it is necessary to carry in or out the food material. The temperature temporarily increased when the door of the accommodation room is opened and closed is also displayed on the display as the history of the temperature to be managed based on the detection by the temperature detecting means. Therefore, in the above case, the conventional apparatus cannot appropriately manage the target temperature.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to address the above problems, and an object of the present invention is to provide a temperature control device for a refrigerator capable of appropriately controlling a target temperature. .

[0006] The structural features of the present invention for solving the above problems include a temperature detecting means for detecting a temperature to be managed, and a plurality of temperature data each representing the temperature detected by the temperature detecting means. Storage means for storing temperature data representing the temperature detected by the temperature detection means for a predetermined number of times in the past at predetermined time intervals and storing the data in the storage means; When the temperature data representing the temperature detected by the means is newly stored in the storage means, the temperature represented by the temperature data newly stored in the storage means and the storage order stored and held in the storage means A maximum temperature detecting means for detecting a maximum temperature from among the temperatures represented by temperature data for a predetermined number of times from a new one, and a table for displaying the detected maximum temperature And a door detecting means for detecting an open state and a closed state of the refrigerator door, and a prohibiting means for prohibiting the storage control means from controlling the storage of the temperature data when the door is opened based on the detection by the door detecting means. And has been provided. In this case, the prohibition unit may execute the prohibition from when the door is opened until the predetermined time elapses after the door is closed.

[0007] In the temperature management apparatus having the features of the present invention configured as described above, the storage control means holds the temperature detected by the temperature detection means for a predetermined number of times at predetermined time intervals. While the data is repeatedly stored in the storage means as the temperature data above, the highest temperature detection means may occasionally output the highest temperature from among the predetermined number of temperatures in a new order of storage stored as temperature data in the storage means. Since the temperature is detected and the display unit displays the detected maximum temperature, the history of the temperature to be managed over the past predetermined time is always represented by the maximum temperature, and is continuously displayed on the display unit. At this time, when the door of the refrigerator is opened and closed, the prohibition unit prohibits the storage control of the temperature data by the storage control unit based on the detection by the door detection unit,
The update storage by the storage unit of the temperature to be managed, which is temporarily increased with the opening and closing of the door, is avoided. This prevents the temperature temporarily increased by opening and closing the door from being detected as the maximum temperature by the maximum temperature detection means and displayed on the display, so that the target temperature can be appropriately managed. Become.

Another feature of the present invention is that a temperature management device having the same temperature detection means, storage means, storage control means, maximum temperature detection means, and display as described above. Door detection means, and prohibition means for prohibiting temperature data storage control by the storage control means from when the door is opened to when a predetermined time elapses from when the door is opened based on the detection by the door detection means. Has been established.
Also in this case, similarly to the above, it is possible to prevent the temperature temporarily increased with the opening and closing of the door from being detected as the maximum temperature by the maximum temperature detecting means and being displayed on the display, so that the target is used. The temperature can be controlled appropriately.
Further, according to this, after a predetermined time has elapsed since the door was opened, the storage control means starts storing the temperature detected by the temperature detecting means in the storage means again, and a predetermined time has elapsed since the door was opened. Since the temperature to be managed later can be detected as the maximum temperature by the maximum temperature detection means, if the door is left open for a long time, The increased temperature to be managed can be detected as the highest temperature and displayed on the display, and the temperature to be managed can be more appropriately managed.

Another structural feature of the present invention is that temperature detecting means for detecting a temperature to be managed, storage means for storing temperature data representing the maximum temperature of the temperature to be managed, Start instruction means for instructing the start of monitoring of the temperature to be managed, and temperature data representing the temperature detected by the temperature detection means when the start of the monitoring of the temperature to be managed is instructed by the start instruction means. Start storage control means for storing in the storage means as temperature data representing the maximum temperature of the temperature to be, and when the temperature detected by the temperature detection means is higher than the maximum temperature represented by the temperature data stored in the storage means, Update control means for updating temperature data representing the maximum temperature stored in the storage means to temperature data representing the detected temperature; and temperature data stored in the storage means. In the temperature management device provided with a display for displaying the maximum temperature represented by the following formula, the door is opened based on the detection by the door detecting means for detecting the open state and the closed state of the door. The prohibition means for prohibiting the temperature data storage control by the storage control means is provided. In this case, the prohibition unit may prohibit the storage control unit from controlling the storage of the temperature data from when the door is opened until the predetermined time elapses after the door is closed. The start instructing means is constituted by a switch or a time measuring means for measuring time, and instructs the start storage control means to start monitoring of a temperature to be managed each time the time measuring means measures a predetermined time. It is preferable to use an instruction means.

[0010] In the temperature management apparatus having another feature of the present invention configured as described above, the maximum temperature stored as temperature data in the storage means is detected by the temperature sensor after the start instruction by the start means. Since the update is selectively performed based on the temperature, the history of the temperature to be managed since the start instruction by the start instruction means is always indicated by the maximum temperature and is continuously displayed on the display. In this case, since the storage means only needs to store the temperature data indicating the maximum temperature, it can be configured at low cost. At this time, when the door of the refrigerator is opened and closed, the prohibiting means prohibits the storage control of the temperature data by the storage control means based on the detection by the door detecting means, and the management temporarily increases with the opening and closing of the door. Avoid storage of the target temperature by the storage means. This prevents the temperature temporarily increased by opening and closing the door from being detected as the maximum temperature by the maximum temperature detection means and displayed on the display, so that the target temperature can be appropriately managed. Become.

Another feature of the present invention resides in a temperature management apparatus having the same temperature detection means, storage means, start instruction means, start storage control means, update control means, and display as described above. Temperature data storage control by the storage control means based on detection by the same door detection means as described above, and from when the door is opened until a predetermined time elapses after the door is opened, based on detection by the door detection means. And a prohibition means for prohibiting the operation. Also in this case, the start instructing means is constituted by a switch or a time measuring means for measuring time,
It is preferable that the time keeping means comprises an instruction means for instructing the start storage control means to start monitoring the temperature to be managed each time the predetermined time is measured. This also
Similarly to the above, it is possible to avoid that the temperature temporarily increased with the opening and closing of the door is detected as the maximum temperature by the maximum temperature detecting means and displayed on the display, so that the target temperature can be appropriately set. Be able to manage. Further, after a predetermined time has elapsed since the door was opened, the storage control means again starts storing the temperature detected by the temperature detection means in the storage means, and the management target after the elapse of the predetermined time since the door was opened. Temperature can be detected as the maximum temperature by the maximum temperature detection means, and if the door is left open for a long time, The detected temperature can be detected as the maximum temperature and displayed on the display, and the target temperature can be managed more appropriately.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION

a. First Embodiment First, a first embodiment of the present invention will be described. In this embodiment, the highest temperature and the lowest temperature of a temperature to be managed over a predetermined time in the past are displayed.

FIG. 1 is a sectional view showing a refrigerator to which the embodiment is applied. This refrigerator includes a housing 10 formed in a rectangular shape with a heat insulating material or the like. The inside of a refrigerator formed inside the housing 10 is partitioned by a partition plate 11 into an accommodation room 12 and a cooling room 13. A door 15 that can be opened and closed is attached to the front surface of the housing 10, and when the door 15 is open, the food F is carried into and out of the accommodation room 12. Has become. A door 15 is provided on the front of the housing 10.
A door switch 16 that is turned off when is opened and turned on when the door 15 is closed is also assembled. A shelf 17 is provided in the accommodation room 12, and accommodates the introduced food F. Also,
A management temperature sensor 18 for detecting the temperature in the accommodation room 12 to be managed by the temperature management device is attached to the upper part of the accommodation room 12 and the lower surface of the partition 11.

An evaporator 21 is mounted on the partition plate 11. The evaporator 21 cools the air in the cooling chamber 13 by supplying the refrigerant that is pressure-fed by the compressor 22 and condensed by the condenser 23. The supplied refrigerant is returned to the compressor 22 again. The evaporator 21 is provided with a defrost heater 24 for melting attached frost and a defrost temperature sensor 25 for detecting the temperature of the evaporator 21. Inside the cooling chamber 13, an in-compartment cooling fan 26 is also provided. The in-compartment cooling fan 26 sucks the lower air in the storage chamber 12 from the gap provided in the partition 11 into the cooling chamber 13 and circulates the cool air in the cooling chamber 13 into the housing 10.

The refrigerator includes an electric control circuit 30 connected to the door switch 16, the temperature sensors 18, 25, the compressor 22, the defrost heater 24, and the cooling fan 26 in the refrigerator. The electric control circuit 30 is constituted by a microcomputer, as shown in FIG. 2, a memory 30a, a temperature management timer 30b, a defrost cycle timer 30c, a defrost backup timer 30d, a drain timer 30e, a fan delay timer 30f, a defrost invalid timer 30g, A door opening / closing invalid timer 30h and first and second interrupt timers 30i and 30j are incorporated. As shown in detail in FIG. 3, the memory 30a has an area for storing first to n-th temperature data K1 to Kn representing the temperature in the storage chamber 12, respectively. The value n is a large positive integer. Each timer 30
b to 30h are for measuring time, respectively. First and second interrupt timers 30i, 30j
8 generates a timer interrupt signal at predetermined short time intervals and outputs a timer interrupt signal to the electric control circuit 30 as shown in FIG.
9 for executing the first and second timer interrupt programs.

The electric control circuit 30 includes a display 3
1, display designation switch group 32, cancel switch 3
3, first to third time setting dials 34 to 36, alarm 3
7, an alarm setting switch group 38 and an external storage device 39 are also connected (each is shown only in FIG. 2). Display 31
Displays the current temperature, the maximum temperature, and the minimum temperature in the accommodation room 12, respectively. Display designation switch 32
The group is a large number of switches for changing and specifying display contents on the display. The cancel switch 33 is a switch for causing the electric control circuit 30 to start measuring the maximum temperature and the minimum temperature again. The first to third time setting dials 34 to 36 are dials for setting first to third predetermined times T1 to T3 described later in a predetermined range, respectively. The alarm 37 is provided for the accommodation room 12.
A lamp and a buzzer for notifying an abnormal temperature in the inside. The alarm setting switch group 38 is a number of switches for setting the operating condition of the alarm 37. The external storage device 39 is used to transmit the temperature information of the refrigerator to the outside, is configured to be detachable, and always stores the same contents as the memory 30a in each process described later. ing. 4 to FIG.
9, a program corresponding to the flowchart shown in FIG. 9 is executed, and based on the detection by the door switch 16 and the temperature sensors 18 and 25, and the operation of the switches 32, 33 and 38 and the dials 34 to 36, the compressor 22 and the defrost heater 24 are operated. , Internal cooling fan 26 and alarm 37
And the display on the display 31 is controlled.

Next, the operation of the refrigerator configured as described above will be described. When a power switch (not shown) is turned on, the electric control circuit 30 starts executing the main program in step 100 of FIG.
Execute the start process. This start processing is performed by the flag FLG
1 to FLG3, number of data DN, and data designation variable DP
Is set to the value "0", and the temperature management timer 30b and the defrost cycle timer 30c are reset-started to start timekeeping. The flag FLG1 indicates that the refrigerator is in normal operation with a value “0”, and indicates that the refrigerator is in each step of the defrost operation with a value of “1” to “3”. . The flags FLG2 and FLG3 prohibit the storage of the temperature detected by the control temperature sensor 18 in the memory 30a at the value "1". Number of data DN
Represents the number of temperature data stored in the memory 30a. The data specification variable DP is stored in the memory 3
This represents the number of the temperature data stored in 0a.

After the start processing, the flag FLG1 remains set to the value "0" until the defrost timer 30c, which has been reset-started in the start processing, measures the defrost cycle time (for example, 6 hours). Based on the determination of “YES” in step 104 and “NO” in step 108, the electric control circuit 30 repeatedly executes the circulation processing of steps 104 to 110. During the circulation process, in step 106, an operation control process is executed. This operation control processing is performed when the temperature in the storage chamber 12 detected by the management temperature sensor 18 becomes higher than a predetermined upper limit temperature until the temperature in the storage chamber 12 reaches the predetermined lower limit temperature. This is a process of operating the in-compartment cooling fan 26 to cool the air in the storage chamber 12. However, the operation control of the compressor 22 and the in-compartment cooling fan 26 is not executed while the progress of the program is stopped, but is executed at any time during the circulation processing. Thus, during the circulation process, the operations of the compressor 22 and the internal cooling fan 26 are controlled, and the temperature in the storage chamber 12 is maintained between the predetermined upper limit temperature and the lower limit temperature.

Further, during the above-mentioned circulation processing, at step 110, a temperature management processing shown in detail in FIG. 5 is executed. This temperature management process is performed based on the temperature detected by the management temperature sensor 18, which is the maximum temperature Kmax of the temperature in the accommodation room 12.
And for detecting and displaying the minimum temperature Kmin.

When the electric control circuit 30 starts execution of the temperature management processing in step 200, the electric control circuit 30 executes step 20.
At 2, the time of the temperature management timer 30b that has been reset and started at step 102 in FIG. 4 is obtained by dividing the first predetermined time T1 (for example, 0 to 48 hours) set by the first time setting dial 34 into n times. It is determined whether or not the predetermined time T1 / n has been reached. If the time count of the temperature management timer 30b has not reached the predetermined time T1 / n at this time, the program proceeds to step 230 based on the determination of "NO", and the execution of the temperature management process is temporarily terminated. On the other hand, at this time, if the time count of the temperature management timer 30b has reached the predetermined time T1 / n, it is determined to be "YES", and the processing after step 204 is executed.

After the electric control circuit 30 adds the value "1" to the data designated variable DP in step 204, if the added data designated variable DP does not exceed the value n which is the number of the largest temperature data. Based on the determination of “NO” in step 206, the program is
Proceed to 0 or later. At this time, the door 15 is closed, the switch 16 is turned on, and the flags FLG1-FLG
If all of LG3 are set to the value “0”, the program proceeds to step 214 based on the determination of “YES” in steps 210 and 212, and the control temperature sensor 18
Is stored in the memory 30a as the temperature data KDP specified by the added data specifying variable DP, and displayed on the display 31 as the current temperature. If the data number DN has not reached the value n after the storage and display, the value “1” is added to the data number DN in step 218 based on the determination of “YES” in step 216. .

After the above processes, the electric control circuit 30 executes a maximum / minimum temperature detection process shown in FIG. This maximum / minimum temperature detection processing is performed in the memory 30
Maximum temperature Km from the temperature data stored in a
This is a process of selecting and displaying ax and the minimum temperature Kmin. When the electric control circuit 30 starts executing the maximum / minimum temperature detection processing in step 300,
2, the temperature represented by the first temperature data K1 is the maximum temperature K
While setting as max and minimum temperature Kmin,
After setting the data designation variable i to the value "1" in step 304, the cyclic process including steps 306 to 322 is repeatedly executed.

During the circulating process consisting of steps 306 to 322, the electric control circuit 30 increases the value of the data designated variable i by "1" at step 306 while increasing the temperature data Ki designated by the designated variable i. In step 31, it is determined whether the indicated temperature is higher than the maximum temperature Kmax and whether it is lower than the minimum temperature Kmin.
The determination is sequentially made at 4,320. When the temperature represented by the temperature data Ki is higher than the maximum temperature Kmax,
In step 316, the maximum temperature Kmax is updated to the temperature represented by the same temperature data Ki. On the other hand, if the temperature represented by the temperature data Ki is lower than the minimum temperature Kmin, the minimum temperature Kmin is updated to the temperature represented by the same temperature data Ki in step 322. However, if the temperature data Ki has been set to the invalid value “E” by the processing described later,
Based on the determination in step 310, the above step 3
14, 320 comparison and determination processing is avoided. Also, the first temperature data K1 is set to an invalid value “E”,
If the maximum temperature Kmax and the minimum temperature Kmin have been set to the same invalid value “E” by the processing in step 302, the comparison determination processing in steps 314 and 320 is performed based on the determinations in steps 312 and 318, respectively. Without going through, the temperatures Kmax and Kmin are updated to the temperature represented by the temperature data Ki specified by the specified variable i.

The circulation processing consisting of steps 306 to 322 is continued until the data designated variable i exceeds the number of data DN based on the judgment of the judgment processing in step 308. Thereby, out of all the temperature data stored in the memory 30a, the data having the invalid value “E” is removed, and the data having the highest temperature is set as the maximum temperature Kmax. The lowest temperature is set as the minimum temperature Kmin. After the completion of the circulation processing, the electric control circuit 30 causes the set maximum temperature Kmax and the minimum temperature Kmin to be displayed on the display 31 as the maximum temperature and the minimum temperature in step 324, and in step 326 The execution of the maximum / minimum temperature display processing ends. However, all the temperature data stored in the memory 30a are set to the invalid value “E”, and the maximum temperature Kmax and the minimum temperature Kmin are set to the same invalid value “E” as a result of the circulation processing including the steps 306 to 322. If "E" has been set, step 32
Based on the determination in step 3, the display processing in step 324 is avoided. As a result, in this case, the display of the highest temperature and the lowest temperature is maintained as it is on the display 31.

After the execution of the above-mentioned maximum / minimum temperature display processing, the electric control circuit 30 resets and starts the temperature management timer 30b again at step 226 in FIG. 5 on condition that the cancel switch 33 is not turned on. After starting the time measurement, the execution of the temperature management process is temporarily ended in step 230. By repeatedly executing such a temperature management process, the temperature detected by the management temperature sensor 18 at that time is sequentially stored as temperature data every predetermined time T1 / n during the circulation process of steps 104 to 110 in FIG. The highest temperature Kmax and the lowest temperature Kmin are newly selected from all the temperature data stored in the past, including the newly stored temperature data, while being newly stored in the memory 30a. Displayed at 31.

During the above-mentioned repetition, a first predetermined time T1 has elapsed since the operation of the refrigerator or the ON operation of the cancel switch 33 described later, and the first to n-th temperature data K1 to N1 are stored in the memory 30a. When Kn is stored, the next time the processing of step 204 is executed,
The value of the data designation variable DP becomes “n + 1” and exceeds the value “n”. In this case, the electric control circuit 30
Based on the determination of “YES” in step 6, step 20
At step 8, the data designation variable DP is set to the value "1". Thus, in step 214, the temperature detected by the management temperature sensor 18 is stored in the memory 30a as temperature data again from the first temperature. That is, the temperature data K1 already stored in the memory 30a
ＫKn, the stored temperature is updated to the detection temperature of the new management temperature sensor 18 in order from the oldest one. Therefore, the memory 30a always keeps storing and holding the temperature in the accommodation room 12 over the past predetermined time T1 based on the n pieces of temperature data K1 to Kn.

As described above, when the first to n-th temperature data K1 to Kn are stored in the memory 30a and the number of data DN reaches the value "n", the process proceeds to step 216. Based on the determination of "NO", the electric control circuit 30 avoids the addition process of step 218. As a result, the data number DN is thereafter kept at the value “n”, and the temperature data to be checked in the maximum / minimum temperature detection processing at the step 220 is kept at n pieces from the first to the nth. The maximum temperature Kmax and the minimum temperature Kmin are selected from the pieces of temperature data K1 to Kn and are displayed on the display 31. In this case, since the n pieces of temperature data K1 to Kn represent the temperatures in the storage chamber 12 over the past predetermined time T1 as described above, the displayed maximum temperature Kmax and minimum temperature Kmin are also the same predetermined time. It goes to T1.

On the other hand, if the cancel switch 33 is turned on during the repetitive execution, the electric control circuit 30
Based on the determination of “YES” in step 222,
In step 224, the number of data DN and the data designation variable D
Set both P to the value "0". As a result, the temperature data starts to be stored again in the memory 30a from the first time onward, and the temperature data stored in the memory 30a up to that point is not checked in the maximum / minimum temperature detection processing in step 220, and Only the temperature data newly started to be stored from the first can be checked, and the maximum temperature K among the temperature data newly started to be stored can be checked.
The maximum and the minimum temperature Kmin are selected and displayed on the display 31.

When the display designation switch group 32 is operated, the electric control circuit 30 executes the program (not shown) to display the designated temperature data among the temperature data stored in the memory 30a on the display 33. To display.

During the repetitive execution, the electric control circuit 3
0 indicates that the alarm 37
Also controls the operation of. Specifically, when the temperature data is newly stored in the memory 30b, the temperature represented by the temperature data and the alarm setting switch group 38 are set on condition that the temperature data is not set to the invalid value “E”. By comparing and determining the set abnormal upper limit temperature and abnormal lower limit temperature, the alarm 37 is activated when the temperature represented by the temperature data is higher than the abnormal upper limit temperature or lower than the abnormal lower limit temperature. Also, during the operation of the alarm 37, based on the end condition set by the alarm setting switch group 38, when the time set by the alarm setting switch group 38 has elapsed from the start of the operation, or when the alarm 30 is newly stored in the memory 30a. When the temperature represented by the temperature data stored in the above is lower than the abnormal upper limit temperature or higher than the abnormal lower limit temperature, the operation of the alarm device 37 is stopped.

Next, the defrosting operation of the refrigerator will be described. If the defrost cycle timer 30c counts the defrost cycle time during the circulation processing of steps 104 to 110 in FIG.
Based on the determination of "S", the electric control circuit 30 advances the program to step 112 and thereafter, and causes the refrigerator to start a defrost operation. In step 112, the compressor 22 and the internal cooling fan 26 are stopped, and the defrost heater 24 is operated. In step 114, the defrost backup timer 30
d is reset-started to start timing. Step 1
At 16, the flag FLG1 is set to the value “1”.

The flag FLG in the above step 116
In accordance with the setting of 1, the electric control circuit 30 thereafter executes step 1 based on the determination of “NO” in step 104.
04, 118 and 110 are repeatedly executed. During the circulation process, in step 118, a defrost control process shown in detail in FIG. 7 is executed.

First, while the flag FLG1 is “1”, the electric control circuit 30 executes the steps 400 to 406 every time this defrost control processing is executed, based on the determination of “YES” in step 402. The process of 432 is repeatedly executed. During the repetitive execution, step 11 in FIG.
By the operation of the defrost heater 24 started in 2,
The evaporator 21 continues to be heated, and the frost attached to the evaporator 21 melts. Then, when the temperature of the evaporator 21 rises and the detected temperature of the defrost temperature sensor 25 becomes higher than the predetermined defrost end temperature, or the defrost backup timer 30d, which has been reset and started in step 114 in FIG. When the defrost end time is measured, the electric control circuit 30 stops the operation of the defrost heater 24 in step 408 based on the determination in step 404 or step 406, and ends the heating of the evaporator 21. Drain timer 30 at 410
e is reset started to start timekeeping, and in step 412, the flag FLG1 is set to a value “2”.

The flag FLG in the above step 412
By setting the value of “1” to “2”, the electric control circuit 30
Each time the defrost control process is executed,
2 and “YE” in step 414
S ”, steps 400, 402, 41
4, 416, 432 are repeatedly executed. During the repetition, the frost-melted water adhering to the evaporator 21 is discharged to the outside of the refrigerator through a water passage (not shown). Then, when the water draining timer 30e, which has been reset-started in step 410, measures a predetermined draining end time, the electric control circuit 30 starts the operation of the compressor 22 in step 418 based on the determination in step 416. In step 420, the fan delay timer 30
At the same time as starting the time counting by resetting f, the flag FLG1 is set to a value “3” in step 422.

The flag FLG in the above step 422
By setting the value of “1” to “3”, the electric control circuit 30
Each time the defrost control process is executed,
Based on the determination of “NO” in 2, 414, the processing of steps 400, 402, 414, 424, 432 is repeatedly executed. During the repetition, the operation of the compressor 22 started in step 418 causes the cooling chamber 1
The air in 3 is cooled. Then, the above step 420
When the fan delay timer 30f, which has been reset-started at step 3, measures a predetermined fan delay time, the electric control circuit 3
0 means that the operation of the internal cooling fan 26 is started in step 426 based on the determination in step 424, the defrost cycle timer 30c is reset and started again in step 428, and time measurement is started.
At step 30, the flag FLG1 is set to a value “0”.

By setting the value of the flag FLG1 to "0" in step 428, the electric control circuit 30 executes the "Y" in step 104 in the main program of FIG.
ES ”, the steps 104 to 110 are performed again.
Is repeatedly executed. When the defrost cycle timer 30c, which has been reset and started in step 428, measures the defrost cycle time, the circulation processing in steps 104, 118, and 110 is started again, and the refrigerator starts the defrost operation. Thereafter, the processing consisting of steps 104 to 118 is repeated and executed.

On the other hand, during the defrost operation, that is, steps 104, 118 and 11 in the main program
During the circulation process of 0, in the temperature management process of step 110, since the flag FLG1 is set to a value of “1” to “3”, based on the determination of “NO” in step 212 of FIG. The storage and display processing of the detected temperature of the control temperature sensor 18 in the step 214 is prohibited.
This prevents the temperature in the storage chamber 12 raised by the defrosting operation from being stored in the memory 30a based on the detection by the management temperature sensor 18, so that it is avoided.
The temperature in the storage chamber 12 during the defrosting operation is
It is avoided that the maximum temperature Kmax is set as the maximum temperature Kmax in the maximum / minimum temperature detection processing 20 and displayed on the display 31 or the alarm 37 is activated based on the temperature in the accommodation room 12 during the defrost operation. In the normal operation, that is, during the repetition of the processing of steps 104 to 110 in the main program, the temperature in the storage chamber 12 is appropriately managed.

When the storage and display processing of the detected temperature of the control temperature sensor 18 in step 214 is prohibited as described above, the electric control circuit 30 should have stored it in step 228 in step 228. Instead of the detected temperature of the control temperature sensor 18, a predetermined invalid value “E” which is data not representing temperature information is stored in the memory 30a as temperature data KDP. This is because the n pieces of temperature data K1 to Kn stored in the memory 30a always correspond to the first temperature data.
This is a measure for displaying a temperature history for a predetermined time T1. As described above, the temperature data set to the invalid value “E” is not compared with the maximum temperature Kmax and the minimum temperature Kmin in the maximum / minimum temperature detection processing in step 220. At this time, the display corresponding to the invalid value “E” is also displayed on the display 31 as the current temperature.

Next, the operation of the refrigerator after the end of the defrost operation will be described. Steps 104 to 104 in FIG.
During the repetitive execution of the process consisting of 118, the electric control circuit 30
Executes the first timer interrupt program shown in detail in FIG. 8 every time the first interrupt timer 30i measures the predetermined short time. This first timer interrupt program is executed for a second predetermined time T2 (for example, 0 minutes to 60 minutes) after the end of the defrost operation.
This is for prohibiting the storage of the detected temperature of the control temperature sensor 18 in the memory 30a and the display on the display 31.

First, while the flag FLG2 is still set to the value “0” by the processing of step 102 in FIG. 4, the electric control circuit 30 executes the processing of step 502 at every execution of the first timer interrupt program. YE
S ", steps 500 to 504, 51
4 is repeatedly executed. During the repetitive execution, the defrosting operation of the refrigerator is completed, and FIG.
When the value of the flag FLG1 changes from "3" to "0" by the processing of step 430, the defrost invalidation timer 30g is reset-started in step 506, and time measurement is started.
The value of G2 is set to "1".

By setting the flag FLG2, FIG.
In the temperature management process of step 110 during the circulation process of steps 104 to 110 in the main program, the control temperature sensor 1 in step 214 is determined based on the determination of “NO” in step 212 of FIG.
The storage and display processing of the detected temperature 8 is continuously prohibited during the defrost operation. This prevents the temporarily high temperature in the storage chamber 12 from being stored in the memory 30a based on the detection by the management temperature sensor 18 immediately after the defrosting operation. Is set as the maximum temperature Kmax in the maximum / minimum temperature detection processing in step 220 and displayed on the display 31 or the alarm 37 is activated based on the temperature in the accommodating chamber 12 which is high at the same time. Is avoided during normal operation, that is, step 104 in the main program.
The temperature in the accommodation room 12 during the repetitive execution of the processes of to 110 is appropriately managed. Also in this case, the electric control circuit 30 stores and displays the invalid value “E” at step 228 as in the case of the above-described defrost operation.

On the other hand, by setting the flag FLG2,
In the first timer interrupt program,
Based on the determination of "NO" in step 502, the processing of steps 500, 502, 510 to 514 is repeatedly executed. During the repetitive execution, when the defrost invalidation timer 30g, which has been reset and started in step 506, measures the second predetermined time T2 set by the second time setting dial 35, the electric control circuit 30 proceeds to step 512. The flag FLG2 is set to the value "0" again, and the prohibition of the storage and display processing of the detected temperature of the control temperature sensor 18 is released.

Next, steps 104 to 118 in FIG.
The case where the door 15 is opened / closed during the repetitive execution of the process consisting of the following will be described. During the repetitive execution, when the door 15 is opened and the door switch 16 is turned off, the electric control circuit 30 determines whether or not “NO” in the step 210 in FIG. At the same time, the control temperature sensor 1
The storage and display processing of the detected temperature of step 8 is prohibited. And
At this time, similarly to the case during the above-described defrost operation and within the predetermined time T2 after the defrost operation, step 228 is performed.
To store and display the invalid value "E".

During the repetitive execution of the processing consisting of the above steps 104 to 118, the electric control circuit 30 sets the second timer shown in FIG. 9 every time the second interrupt timer 30j counts the predetermined short time. Repeated execution of interrupt program. The second timer interrupt program stores the detected temperature of the control temperature sensor 18 in the memory 30a for a third predetermined time T3 (for example, 0 to 10 minutes) after the opened door 15 is closed. And to prohibit the display on the display 31.

First, while the flag FLG3 is still set to the value "0" by the processing of step 102 in FIG. 4, the electric control circuit 30 executes the processing of step 602 every time this first timer interrupt program is executed. YE
S ", steps 600 to 604, 61
4 is repeatedly executed. During the repetition, when the opened door 15 is closed and the door switch 16 is changed from off to on, the door opening / closing invalid timer 30h is reset-started in step 606, and time counting is started. At 608, the value of the flag FLG3 is set to "1".

By setting the flag FLG3, during the repetitive execution of the processing consisting of steps 104 to 118 in the main program of FIG. 4, in the temperature management processing of step 110, "NO" in step 212 of FIG.
The storage and display processing of the detected temperature of the control temperature sensor 18 in step 214
Continued to be banned when 5 was open, step 2
The storage and display of the 28 invalid values "E" are performed.

On the other hand, by setting the flag FLG3,
In the second timer interrupt program,
Based on the determination of “NO” in step 602, the processing of steps 600, 602, 610, and 614 is repeatedly executed. If the door 15 has been closed as described above and remains closed without being reopened, the door opening / closing invalid timer 30h, which has been reset-started in step 606, is set by the third time setting dial 35. When the third predetermined time T3 has been counted,
The electric control circuit 30 determines in step 612 that the flag FLG
3 is set to the value “0” again, and the control temperature sensor 18
Of the detected temperature and prohibition of the display processing is released. If the closed door 15 is reopened and the door switch 16 is turned off while waiting for the third predetermined time T3 by the door opening / closing invalidation timer 30h as described above, step 610 is executed. In step 614, the electric control circuit 30 sets the flag FLG3 to the value "0", and starts waiting again for the door 15 to be closed.

As described above, in the above embodiment,
From the time when the door 15 is opened to the time when the third predetermined time T3 elapses after the door 15 is closed, Step 2 in FIG.
The storage and display processing of the detected temperature of the control temperature sensor 18 in 14 is prohibited. This avoids storing the temperature in the storage chamber 12 which temporarily rises with the opening and closing of the door 15 in the memory 30a based on the detection by the management temperature sensor 18, so that the temperature rises at the same time. Containment room 1
5 is set as the maximum temperature Kmax in the maximum / minimum temperature detection processing in step 220 of FIG.
, Or the alarm 37 is prevented from being activated based on the temperature in the accommodation room 12 which has risen at the same time, and during normal operation, that is, repeatedly executing the processing of steps 104 to 110 in the main program. The temperature inside the accommodation room 12 is appropriately managed.

Next, a modification of the above embodiment will be described. In this modification, a modified second timer interrupt program as shown in FIG. 10 is executed every time the second interrupt timer 30j measures the predetermined short time. This second timer interrupt program is different from the second timer interrupt program of FIG. 9 in the above embodiment in that the determination process of step 618 is executed instead of step 604, and the determination process of step 610 is omitted. is there.

In this modification, when the closed door 15 is opened and the door switch 16 changes from ON to OFF, the electric control circuit 30 executes the above-described steps 606 and 606.
The execution of each process of 608 causes the door opening / closing invalidation timer 30h
Is reset to start timekeeping, and the value of the flag FLG3 is set to "1" to prohibit the storage and display processing of the detected temperature of the control temperature sensor 18 in step 214 in FIG. Then, the door opening / closing invalidation timer 30h that has started the reset is set to the third time setting dial 3
When the third predetermined time T3 set in Step 5 (in this case, for example, 0 to 30 minutes) is counted, the electric control circuit 30 sets the flag FLG3 to the value “0” again in Step 612, The storage of the detected temperature of the management temperature sensor 18 and the prohibition of the display processing are released.

Therefore, in the above modification, the door 1
From the time when the door 5 is opened to the time when the door 15 is opened and the third predetermined time T3 elapses, the storage and display processing of the detected temperature of the control temperature sensor 18 in the step 214 in FIG. 5 is prohibited. Thus, similarly to the case of the above-described embodiment, it is avoided that the temperature in the storage chamber 12 that has temporarily increased with the opening and closing of the door 15 is stored in the memory 30a based on the detection by the management temperature sensor 18. For,
The temperature in the accommodation room 12 is appropriately managed.

In the above modification, even if the flag FLG3 is set to the value "0" at step 614 in FIG. 10 after the third predetermined time T3 has elapsed since the door 15 was opened, the door 15 is not opened. While step is open, step 210 of FIG.
Although the storage process of the detected temperature of the management temperature sensor 18 and the prohibition of the display process are continued by the determination process of
At this time, the prohibition may be released regardless of the state of the door 15. In this case, the determination process in step 210 in FIG. 5 is omitted, and in step 618 in FIG. 10, it is determined whether or not the door switch 16 has changed from on to off instead of whether or not the door switch 16 is off. It is good to make a judgment. According to this, when the third predetermined time T3 elapses after the door 15 is opened, regardless of the state of the door 15, the control temperature sensor 18 is returned to step 214 in FIG.
Is started to be stored in the memory 30a, so that the temperature in the storage chamber 12 after the third predetermined time T3 has elapsed since the door 15 was opened is set as the maximum temperature Kmax by the maximum / minimum temperature detection processing in step 220. It is possible to be. Therefore, when the door 15 is left open for a long time, the temperature in the storage chamber 12 that has risen with the open state of the door 15 is set as the maximum temperature Kmax and displayed on the display 31. Storage room 12
The alarm 37 can be activated based on the temperature in the inside, so that the target temperature can be managed more appropriately.

B. Second Embodiment Next, a second embodiment of the present invention and modifications thereof will be described. In this embodiment and the modified example, the maximum temperature and the minimum temperature after the cancel operation of the temperature to be managed are displayed. The embodiment and the modified example are similar to the first embodiment and the modified example in FIGS.
2, but the data structure of the memory 30a in FIG. 2 is configured as shown in FIG. This memory 30
a has an area for storing current temperature data K representing the current temperature in the accommodation room 12 and maximum temperature data Kmax and minimum temperature data Kmin respectively representing the maximum temperature and the minimum temperature after the cancel operation described later. doing. Further, the temperature management timer 30b, the display instruction switch group 32, and the first time setting dial 34 may be omitted.

In the second embodiment and the modification,
The electric control circuit 30 executes the main program shown in FIG. 4, the first timer interrupt program shown in FIG. 8, and the second timer interrupt program shown in FIG. 9 or FIG. 10, as in the first embodiment and its modifications. . However, in the second embodiment and the modified example, the start processing in step 102 and the temperature management processing in step 110 in the main program are different from those in the first embodiment and the modified examples.

In the start processing, the electric control circuit 30
Sets the flags FLG1 to FLG3 to the value “0”, resets the defrost timer 30c to start timekeeping, and initializes the maximum temperature data Kmax and the minimum temperature data Kmin. Specifically, at this time, if the door 15 is closed and the switch 16 is turned on, the temperature in the storage chamber 12 at that time detected by the management temperature sensor 18 is used as the temperature data Kmax,
Kmin is stored in the memory 30a. At this time, if the door 15 is opened and the switch 16 is turned off, the invalid value “E” is stored in the temperature data Kmax, Kmin.
Respectively in the memory 30a.

Further, in the second embodiment and the modification, the program shown in FIG. 12 is executed as the temperature management processing in step 110. Electric control circuit 30
When the door 15 is closed and the switch 16 is turned on and the flags FLG1 to FLG3 are all set to the value “0” every time the execution of the temperature management process is started in step 700, Based on the determination of “YES” in Steps 702 and 704, the current temperature in the storage room 12 detected by the management temperature sensor 18 is stored as current temperature data K in the memory 30 in Step 706.
a and the display 31 displays the current temperature. Then, in step 708, a maximum / minimum temperature detection process shown in detail in FIG. 13 is executed. However,
The parentheses in FIG. 13 are referred to in a third embodiment and a modification thereof described later. This maximum / minimum temperature detection process is a process of selectively updating and displaying the maximum temperature Kmax and the minimum temperature Kmin stored in the memory 30a.

The electric control circuit 30 starts the execution of the maximum / minimum temperature detection processing in step 800, and
The temperature represented by the current temperature data K stored in step 706 is the maximum temperature data K stored in the memory 30a.
If the temperature is higher than the temperature represented by max, the maximum temperature data K is determined in step 808 based on the determination in step 806.
The maximum is updated to the temperature represented by the current temperature data K. On the other hand, the temperature represented by the current temperature data K is the lowest temperature data K
If it is lower than min, the minimum temperature data Kmin is updated to the temperature represented by the current temperature data K in step 814 based on the determination in step 812. Then, at step 816, the temperatures represented by the selectively updated maximum temperature data Kmax and minimum temperature data Kmin are displayed on the display 31 as the maximum temperature and the minimum temperature, respectively. However, if the current temperature data K has been set to the invalid value “E” by the processing of step 718 described below, the above processing is avoided based on the determination in step 802. Step 10 in FIG.
If the maximum temperature Kmax and the minimum temperature Kmin have been set to the invalid value “E” by either the start processing of Step 2 or the processing of Step 720 described later, the above-described steps are performed based on the determinations in Steps 804 and 810, respectively. 8
The respective temperatures Kmax and Kmin are updated to the temperature represented by the current temperature data K without going through the comparison determination process of steps 06 and 812.

After the above processes, if the cancel switch 33 has not been turned on, the electric control circuit 30 terminates the temperature management process in step 722 based on the determination of "NO" in step 710. . By repeatedly executing such temperature management processing, the current temperature data K and the maximum temperature data Kmax stored in the memory 30a are obtained.
The minimum temperature data Kmin is continuously updated as needed based on the detection of the management temperature sensor 18, and the display 31 always displays the maximum temperature and the minimum temperature in the storage room 12 since the operation of the refrigerator was started. to continue.

On the other hand, if the cancel switch 33 is turned on during the repetitive execution, the electric control circuit 30 advances the program to step 712 and subsequent steps based on the determination of "YES" in step 710. At this time, door 1
5 is closed, the switch 16 is turned on, and the flags FLG1 to FLG3 are all set to the value “0”, then “YE” in steps 712 and 714
In step 716, based on the determination of “S”, the current temperature in the storage room 12 detected by the control temperature sensor 18 is used as the current temperature data K, the maximum temperature data Kmax, and the minimum temperature data Kmin, respectively. Memory 30a
And updates the current temperature on the display 31.
The temperature is displayed as the maximum temperature and the minimum temperature, respectively. Thereby, the maximum temperature and the minimum temperature in the accommodation room 12 are measured and displayed again.

By repeatedly executing the above-described temperature management processing, the display unit 31 always displays the highest temperature and the lowest temperature in the storage chamber 12 since the start of operation of the refrigerator or the ON operation of the cancel switch 33. to continue.
In this case, since the memory 30a only needs to store the three temperature data of the current temperature data K, the maximum temperature data Kmax, and the minimum temperature data Kmin, the memory 30a is inexpensive as compared with the first embodiment and its modification. Can be configured.

On the other hand, if the door 15 is open and the door switch 16 is off during the repetitive execution of the above-described temperature management processing, or if the refrigerator is in the defrost operation or after the end of the defrost operation, In a state where the predetermined time T2 has not elapsed, the flag FLG1 is set to a value of “1” to “3” or the flag FLG2 is set to a value of “1”, as in the first embodiment and its modification. Or the third predetermined time has not elapsed since the door 15 was closed since the door 15 was opened, or the door 1
Whether the third predetermined time has elapsed since the door 15 was opened after the door 5 was opened, and the flag FLG3 is set to the value “1” as in the first embodiment and its modification. If it has been set, the electric control circuit 30 proceeds to step 702
Alternatively, by the determination processing of step 704 and step 712 or step 714, respectively,
The storage and display processing of the detected temperature of the control temperature sensor 18 in 716 is prohibited. This prevents the temperature in the storage chamber 12, which has been temporarily increased due to the defrosting operation of the refrigerator or the opening and closing of the door 15, from being stored in the memory 30 a based on the detection by the temperature management sensor 18. The temperature in the accommodation room 12 that has risen temporally rises to the maximum temperature K in the maximum / minimum temperature detection processing in step 710 in FIG.
The temperature in the storage chamber 12 during the normal operation, that is, during the repetition of the processing of steps 104 to 110 in the main program, is properly managed while avoiding being set as the max and being displayed on the display 31. become.

As described above, steps 706 and 71
When the storage and display processing of the detected temperature of the control temperature sensor 18 in step 6 is prohibited, the electric control circuit 30 replaces the processing of steps 706 and 716 with step 7
18 and 720 are executed. The process of step 718 is performed by using the invalid value “E” as the current temperature data K in the memory 30.
a, and the same invalid value “E” is displayed on the display 31.
Is a process for displaying a display corresponding to the current temperature as the current temperature. In the process of step 720, the invalid value “E” is stored in the memory 30a as the current temperature data K the maximum temperature Kmax and the minimum temperature Kmin, and a display corresponding to the invalid value “E” is displayed on the display 31 at the current temperature. Is displayed. When step 720 is executed, the display of the maximum temperature and the minimum temperature on the display 31 is maintained as it is.

In the modified example of the second embodiment, as in the modified example of the first embodiment, when the third predetermined time T3 has elapsed since the door 15 was opened, the door 15 is opened. In order to release the prohibition regardless of the state, the determination process of step 618 in FIG. 10 is changed in the same manner as the modification of the first embodiment, and
The determination processing of Steps 702 and 712 of Step 2 may be omitted. Also in this case, when the door 15 is left open for a long time, the temperature in the storage chamber 12 that has risen with the open state of the door 15 is set as the maximum temperature Kmax, and is displayed on the display 31. Since the alarm 37 can be displayed or actuated based on the temperature in the storage chamber 12 that has risen, the target temperature can be managed more appropriately.

C. Third Embodiment Next, a third embodiment of the present invention and modifications thereof will be described. In the present embodiment and the modified example, the maximum temperature and the minimum temperature of the temperature to be managed are displayed at predetermined time intervals. The embodiment and the modified example are also configured as shown in FIGS. 1 and 2 similarly to the above-described embodiments and the respective modified examples, but the data structure of the memory 30a is shown in FIG.
It is configured as follows. This memory 30a is
Has an area for storing the current temperature data K representing the current temperature in and the n-th to n-th data sets. Each data set includes the maximum temperature data Kmax and the minimum temperature data Kmin representing the maximum temperature and the minimum temperature in the accommodation room 12 for each predetermined time.

In the third embodiment and the modification,
The electric control circuit 30 includes a main program shown in FIG. 4, a first timer interrupt program shown in FIG. 8, and a program shown in FIG. 9 or FIG.
Execute the timer interrupt program. However,
In the third embodiment and the modified example, the start processing of step 102 in the main program and step 1
Ten temperature management processes are different from the above embodiments and the respective modifications.

In the above start processing, the electric control circuit 30
Sets the flags FLG1 to FLG3 to a value “0”, resets the temperature management timer 30b and the defrost timer 30c, starts timekeeping for each, and
The maximum temperature data Kmax1 and the minimum temperature data Kmin1 of the first data set are managed by the same method as the initial setting of the maximum temperature data Kmax and the minimum temperature data Kmin in the second embodiment and its modified example. Initially, the temperature detected by the sensor 18 or the invalid value “E” is set. In addition, the data set designation variable SP is set to the value “1”. The data set designation variable SP is stored in the memory 3
It represents the number of the data set stored in 0a.

In the third embodiment and the modification, the program shown in FIG. 15 is executed as the temperature management process in step 110. Electric control circuit 30
Is that the door 15 is closed, the switch 16 is turned on, and the flags FLG1 to FLG3 are all set to the value "0" every time the execution of the temperature management process is started in step 900. Based on the determination of “YES” in Steps 902 and 904, in Step 906, the current temperature in the accommodation room 12 detected by the management temperature sensor 18 is stored as current temperature data K in the memory 30.
a and the display 31 displays the current temperature. Then, in step 908, a maximum / minimum temperature detection process is executed. This maximum / minimum temperature detection processing is performed in the same manner as the maximum temperature data Kmax and the minimum temperature data Kmin are updated and displayed in the above-described second embodiment and its modified example, as indicated by parentheses in FIG. , The maximum temperature data Kmax of the data set specified by the data set specification variable SP.
This is a process for updating and displaying the SP and the minimum temperature data KminSP.

After each of the above processes, the cancel switch 33 is not turned on, and the step 102 in FIG.
If the temperature management timer 30b, which has been reset and started in the start processing of the above, has not counted the first predetermined time T1 set by the first time setting dial 34, step 9
Based on the determination of “NO” in 10, 912, the electric control circuit 30 ends this temperature management processing in step 932. By repeatedly executing such a temperature management process, the current temperature data K stored in the memory 30b,
Maximum temperature data KmaxSP and minimum temperature data Kmi
The nSP is continuously updated on the basis of the detection of the management temperature sensor 18, and the display 31 continuously displays the highest temperature and the lowest temperature in the accommodation room 12 since the start of the operation of the refrigerator.

On the other hand, during the repetition execution, the first predetermined time T1 has elapsed since the operation of the refrigerator started, and
When the timer 30b, which has been reset and started in the start processing of step 102, measures the same predetermined time T1, the electric control circuit 30 advances the program to step 914 and subsequent steps based on the determination of "YES" in step 912. . In this case, the electric control circuit 30 adds the value “1” to the data set designation variable SP in step 916,
If the added data designation variable SP does not exceed the value n which is the number of the largest data set, step 91 is executed.
Step 920 based on the determination of “NO” in 6
Then, the temperature management timer 30b is reset and started again to start timing, and then the program proceeds to step 922 and subsequent steps. Then, when the door 15 is closed and the switch 1
6 is turned on and all the flags FLG1 to FLG3 are set to the value “0”,
Based on the determination of “YES” in 924, in step 826, the current temperature in the accommodation room 12 detected by the control temperature sensor 18 is designated by the current temperature data K and the data set designation variable SP. The updated temperature is stored in the memory 30a as the maximum temperature data KmaxSP and the minimum temperature data KminSP of the data set, and is displayed on the display 31 as the current temperature, the maximum temperature, and the minimum temperature, respectively. This allows
Thereafter, the maximum temperature and the minimum temperature in the accommodation room 12 are measured and displayed again as the maximum temperature data KmaxSP and the minimum temperature data KminSP of the new data set specified by the data specification variable SP added in the step 814. Will be done.

By repeatedly executing the temperature management process as described above, the data set is stored in the memory 30a while being switched sequentially from the first at the first predetermined time T1. The predetermined time T represented by the maximum temperature data KmaxSP and the minimum temperature data KminSP of the data set
The maximum temperature and the minimum temperature in each accommodation room 12 are always displayed.

When the first to n-th data sets are stored in the memory 30a during the repetitive execution, the value of the data set designating variable SP becomes " n + 1 ”and exceeds the value“ n ”. In this case, the electric control circuit 30 proceeds to step 916
Based on the determination of “YES” in step 918,
Sets the data designation variable SP to the value "1" again. Thus, in step 906, the data sets are stored again in order from the first.

On the other hand, if the cancel switch 33 is turned on during the repetitive execution, the electric control circuit 30
Based on the determination of “YES” in step 910,
The time of the temperature management timer 30b and the data set designation variable S
Regardless of the value of P, the program proceeds to step 918 to set the data designation variable SP to the value "1". In this case as well, the data sets are stored again sequentially from the first.

On the other hand, during the repetition, the door 15 is opened and the door switch 16 is turned off, or the refrigerator is in the defrost operation or the second predetermined time T2 has elapsed after the end of the defrost operation. In the absence of the flag FL as in the above-described embodiments and the respective modifications.
Flag FL indicating whether G1 is set to a value between “1” and “3”
When G2 is set to the value "1", or when the door 15 is opened, the door 15 is closed and the third predetermined time has not elapsed, or when the door 15 is opened. If the third predetermined time has not elapsed since the door 15 was opened, and the flag FLG3 is set to the value “1” as in the above-described embodiments and respective modifications,
The electric control circuit 30 determines in step 902 or step 90
By the determination processing of step 4 and step 922 or step 924, the storage and display processing of the detected temperature of the control temperature sensor 18 in steps 906 and 926 are prohibited. As a result, the temperature in the storage chamber 12 that has temporarily risen due to the defrosting operation of the refrigerator or the opening and closing of the door 15 can be stored in the memory 30 based on the detection by the temperature management sensor 18.
a, the temperature in the storage chamber 12 that has risen at the same time is set as the maximum temperature KmaxSP in the maximum and minimum temperature detection processing in step 710 in FIG. The display is avoided and during normal operation, that is, step 1 in the main program
The accommodation room 12 during the repetitive execution of the processing of steps 04 to 110
The temperature inside is properly controlled.

As described above, steps 906 and 92
When the storage and display processing of the detected temperature of the control temperature sensor 18 in step 6 is prohibited, the electric control circuit 30 replaces the processing of steps 906 and 926 with step 9
28 and 930 are executed. The process of step 928 is performed by setting the invalid value “E” as the current temperature data K in the memory 30.
a, and the same invalid value “E” is displayed on the display 31.
Is a process for displaying a display corresponding to the current temperature as the current temperature. The process of step 930 sets the invalid value “E” to the current temperature data K and the maximum temperature data KmaxS of the data set specified by the data set specification variable SP.
Memory 30a as P and minimum temperature data KminSP
And the display corresponding to the invalid value “E” is displayed on the display 31 as the current temperature. When the process of step 930 is performed, the display of the maximum temperature and the minimum temperature on the display 31 is maintained as it is.

Further, in the modification of the third embodiment, similarly to the modification of each of the above embodiments, when the third predetermined time T3 has elapsed since the door 15 was opened, the state of the door 15 is changed. In order to release the prohibition regardless of the above, the determination processing of step 618 in FIG. 10 is changed in the same manner as the modification of each of the above embodiments, and the determination processing of steps 902 and 922 in FIG. 15 is omitted. It is good to Also in this case, when the door 15 is left open for a long time, the temperature in the storage chamber 12 that has risen with the open state of the door 15 is set as the maximum temperature Kmax, and is displayed on the display 31. Displayed or raised accommodation room 12
The alarm 37 can be activated based on the temperature in the inside, so that the target temperature can be managed more appropriately.

In the above-described embodiments and modifications, the above-described controls are executed with the temperature in the storage room 12 as a management target. However, the respective controls are executed with the core temperature of the food material F as a management target. You may make it. In this case, FIG.
As shown by a two-dot chain line, the control temperature sensor 18 is formed in a bar shape and inserted into the food F so that the core temperature of the food F is detected by the control temperature sensor 18 and detected. Each of the above controls may be executed based on the core temperature of the food F. In addition, the control temperature sensor 18
Is covered with a film having a heat capacity similar to that of the food F, and the control temperature sensor 18 virtually detects the core temperature of the food F, and executes each of the above-described controls based on the detected core temperature of the food F. You may make it. As shown by a two-dot chain line in FIG. 2, a core for setting a heat radiation coefficient and a heat capacity of the food F in the electric control circuit 30, a correction coefficient corresponding to the position of the food F in the accommodation room 12, and the like. The temperature estimation switch group 41 is connected, and the core temperature of the same food material F is estimated from the temperature in the accommodation room 12 detected by the control temperature sensor 18 based on each coefficient set by the concentric temperature setting switch group 41. The above-described control may be executed based on the detected core temperature of the foodstuff F.

In each of the above embodiments and modifications, each control of the temperature management device is executed by using the electric control circuit 30 of the refrigerator that controls the compressor 22, the defrost heater 24 and the cooling fan 26 in the refrigerator. However, an electric control circuit that executes only each control of the temperature management device may be housed in a separate housing, and the temperature management device may be configured independently. In this case, the electric control circuit that executes only each control of the temperature management device includes the refrigerator, the temperature in the storage room 12, the upper limit temperature and the lower limit temperature set in the refrigerator, and the refrigerator in the defrost operation. The information is transmitted so as to determine whether or not there is a temperature control process. In parallel with the control of the refrigerator 22, the defrost heater 24 and the cooling fan 26 in the refrigerator, the temperature management process of FIGS. The first timer interrupt program shown in FIG. 8, the second timer interrupt program shown in FIGS. 9 and 10, the display control according to the display instruction switch group 32, and the control of the alarm 37 may be executed.

In each of the above embodiments and modifications, the temperature information of the refrigerator is transmitted to the outside by attaching and detaching the external storage device 39. However, as shown by the two-dot chain line in FIG. An infrared light emitting element 42 representing the maximum temperature and the minimum temperature in the chamber 12 by infrared light is connected to the electric control circuit 30, and the infrared light emitting element 4 is connected to an external device.
The temperature information of the refrigerator may be transmitted to the outside by reading infrared rays emitted from the refrigerator 2.

In the above-described embodiment and the modification, the display 31 displays the current temperature, the maximum temperature, and the minimum temperature, respectively.
May be switched and displayed in accordance with the instruction given by the user.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a refrigerator to which a temperature management device according to first to third embodiments of the present invention and modifications thereof is applied.

FIG. 2 is a block diagram showing an electric control unit of the refrigerator.

FIG. 3 is a format diagram of the memory of FIG. 2 according to the first embodiment of the present invention and its modification.

FIG. 4 is a flowchart showing a main program executed by the microcomputer of FIG. 2;

FIG. 5 is a flowchart showing details of a temperature management process in FIG. 4 according to the first embodiment of the present invention and its modification.

FIG. 6 is a flowchart illustrating details of a maximum / minimum temperature detection process of FIG. 5;

FIG. 7 is a flowchart showing details of a defrost control process of FIG. 4;

FIG. 8 is a flowchart showing a first timer interrupt program executed by the microcomputer of FIG. 2;

FIG. 9 relates to the first to third embodiments of the present invention,
Is a flowchart showing a second timer interrupt program executed by the microcomputer of FIG.

FIG. 10 relates to a modification of the first to third embodiments of the present invention;
It is a flowchart which shows a timer interrupt program.

FIG. 11 is a format diagram of the memory of FIG. 2 according to the second embodiment of the present invention and its modification.

FIG. 12 is a flowchart showing details of a temperature management process in FIG. 4 according to the second embodiment of the present invention and its modification.

FIG. 13 is a flowchart illustrating details of a maximum / minimum temperature detection process in FIG. 12;

FIG. 14 is a format diagram of the memory of FIG. 2 according to the third embodiment of the present invention and its modification.

FIG. 15 is a flowchart showing details of a temperature management process in FIG. 4 according to the third embodiment of the present invention and its modification.

[Explanation of symbols]

F: foodstuffs, 10: housing, 12: accommodation room, 15 ...
Door, 16: Door switch, 18: Control temperature sensor, 30:
Electrical control circuit, 30a memory, 30b temperature management timer, 30h door open / close invalid timer, 31 display, 33
Cancel switch.

Claims (8)

[Claims] The present invention is applied to a refrigerator that has a door that can be opened and closed and that opens the door and stores the food carried into the accommodation room in a low temperature state, and controls the temperature in the accommodation room or the core temperature of the food. Temperature detecting means for detecting the temperature to be managed, storage means capable of storing a plurality of temperature data each representing the temperature detected by the temperature detecting means, the temperature detection Storage control means for storing the temperature data representing the temperature detected by the means for the predetermined number of times in the past at predetermined time intervals and storing the same in the storage means; and wherein the storage control means is detected by the temperature detection means. When the temperature data indicating the temperature is newly stored in the storage means, the temperature represented by the temperature data newly stored in the storage means and the data stored in the storage means are stored. A maximum temperature detecting means for detecting a maximum temperature from among the temperatures represented by the temperature data for a predetermined number of times from a new one in the memory order, an indicator for displaying the detected maximum temperature, and opening of the door. A door detection unit that detects a state and a closed state; and a prohibition unit that prohibits storage control of the temperature data by the storage control unit when the door is opened based on the detection by the door detection unit. Characteristic temperature control device for refrigerators. 2. The temperature control device according to claim 1, wherein the prohibition means is provided by the storage control means from when the door is opened to when a predetermined time elapses after the door is closed. A temperature management device for a refrigerator, wherein storage control of temperature data is prohibited. The present invention is applied to a refrigerator that has a door that can be opened and closed and stores the food carried in the accommodation room in a low temperature state by opening the door, and controls the temperature in the accommodation room or the core temperature of the food. Temperature detecting means for detecting the temperature to be managed, storage means capable of storing a plurality of temperature data each representing the temperature detected by the temperature detecting means, the temperature detection Storage control means for storing the temperature data representing the temperature detected by the means for the predetermined number of times in the past at predetermined time intervals and storing the same in the storage means; and wherein the storage control means is detected by the temperature detection means. When the temperature data indicating the temperature is newly stored in the storage means, the temperature represented by the temperature data newly stored in the storage means and the data stored in the storage means are stored. A maximum temperature detecting means for detecting a maximum temperature from among the temperatures represented by the temperature data for a predetermined number of times from a new one in the memory order, an indicator for displaying the detected maximum temperature, and opening of the door. A door detection unit that detects a state and a closed state, based on the detection by the door detection unit, from the time when the door is opened to the time when the door is opened and a predetermined time elapses, by the storage control unit. A temperature management device for a refrigerator, comprising: a prohibition unit that prohibits temperature data storage control. The present invention is applied to a refrigerator that has a door that can be opened and closed and stores the food brought into the accommodation room by opening the door in a low temperature state, and the temperature in the accommodation room or the core temperature of the food is controlled. A temperature detecting device for detecting a temperature to be managed, a storage device for storing temperature data representing a maximum temperature of the temperature to be managed, and a device to be managed. Start instructing means for instructing start of temperature monitoring, and when the start instructing means instructs start of monitoring of the temperature to be managed, temperature data representing the temperature detected by the temperature detecting means is stored in the management object. Start storage control means for storing in the storage means as temperature data representing the maximum temperature of the temperature to be set, and temperature data in which the temperature detected by the temperature detection means is stored in the storage means Update control means for updating the temperature data representing the maximum temperature stored in the storage means to the temperature data representing the detected temperature when the temperature is higher than the maximum temperature represented by the storage means; and the temperature data stored in the storage means. And a display that displays a maximum temperature represented by: a door detection unit that detects an open state and a closed state of the door; and the door is opened based on the detection by the door detection unit. And a prohibition unit for prohibiting the storage control of the temperature data by the storage control unit. 5. The temperature control device according to claim 4, wherein the prohibition means is provided by the storage control means from when the door is opened to when a predetermined time elapses after the door is closed. A temperature management device for a refrigerator, wherein storage control of temperature data is prohibited. 6. The present invention is applied to a refrigerator that has a door that can be opened and closed and that opens the door to store the food carried into the accommodation room in a low temperature state, and controls the temperature in the accommodation room or the core temperature of the food. A temperature detecting device for detecting a temperature to be managed, a storage device for storing temperature data representing a maximum temperature of the temperature to be managed, and a device to be managed. Start instructing means for instructing start of temperature monitoring, and when the start instructing means instructs start of monitoring of the temperature to be managed, temperature data representing the temperature detected by the temperature detecting means is stored in the management object. Start storage control means for storing in the storage means as temperature data representing the maximum temperature of the temperature to be set, and temperature data in which the temperature detected by the temperature detection means is stored in the storage means Update control means for updating the temperature data representing the maximum temperature stored in the storage means to the temperature data representing the detected temperature when the temperature is higher than the maximum temperature represented by the storage means; and the temperature data stored in the storage means. And a display that displays a maximum temperature represented by the following: a door detection unit that detects an open state and a closed state of the door; and a door that opens based on the detection by the door detection unit. A temperature control device for a refrigerator, further comprising: a prohibition unit for prohibiting the temperature data storage control by the storage control unit from when the door is opened until a predetermined time elapses. 7. The temperature management device for a refrigerator according to claim 4, wherein said start instruction means is a switch. 8. The temperature management device according to claim 4, wherein said start instruction means is a time measuring means for measuring a time, and said start instruction means is a means for measuring a predetermined time. An instruction means for instructing the start storage control means to start monitoring the temperature to be managed.